JP2010269846A - Screwing structure and lid structure of liquid-enclosed body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screwing structure that secures a sure screwing strength while reducing the amount of screwing, whereas, to provide a lid structure of a liquid-enclosed body capable of being safely used by reducing the chances of a liquid enclosed therein leaking out under a state of screwing being achieved. <P>SOLUTION: There is disclosed a high water-stopping cap structure 1 constituted by a cylindrical shape opening 20 formed in a reservoir tank 2 wherein a liquid is enclosed, the opening 20 communicating the interior 2a of the reservoir tank 2 and the exterior thereof, and by a water-stopping cap 10 that seals the cylindrical shape opening 20. The prevention of liquid leakage from the sealed cylindrical shape opening 20 is effected by having the opening's upper end part 20c tightly kept in contact with a ring packing 15, due to the opening's upper end part 20c being screwed together between the cylindrical shape opening 20 and the water-stopping cap 10, with the locking of a cap side inner screw thread 14b of an inner side ring part 13 with the body side screw thread 21b of the cylindrical shape opening 20 serving to improve the preventive capability of liquid leakage. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a screw structure that can ensure a reliable screw strength while reducing the screwing amount, and a lid structure that uses the screw structure in a liquid enclosure that encloses a liquid in a hot water bottle, a liquid storage container, or the like. More specifically, the present invention relates to a lid structure having excellent liquid leakage prevention performance that prevents liquid enclosed inside from leaking.

  Conventionally, there are many screwing structures in which two articles each having a helical thread portion corresponding to each are screwed and screwed together. In this screwing structure, the screwing strength that opposes the tensile force in the direction of separating the two articles in the screwed state depends on the locking length of the helical screw portion. However, in recent years, high performance has been demanded for everything, while miniaturization and weight reduction have been demanded. In such a situation, in the above-described screwing structure, in order to secure a desired screwing strength, a predetermined screwing amount is required to secure a locking length, and it has been difficult to reduce the size.

In addition, as the one using a screwing structure in which two articles each having a helical screw portion corresponding to each other are screwed and screwed together, a lid that prevents the liquid enclosed inside from leaking out by the screwing structure Many structures have been proposed.
For example, the “sealing plug structure of a cryopreservation container” in Patent Document 1 below is one of them.

  The above-mentioned “sealing container structure for cryopreservation container” is composed of a container made of synthetic resin and a cap. When the cap is screwed together with a ridge formed on the inner peripheral edge of the open end of the cap (the lower end of the ring portion) A ridge that engages with the ridge is formed in the mouth portion on the container side.

  Thereby, when the cap is screwed, the cap ridge and the ridge of the mouth on the container side are engaged, and even if the container or the cap is deformed due to temperature change, the screwed cap does not loosen. It has a configuration.

  In the case of the above-described “tight plug structure”, the cap is not loosened, but, for example, when the container body is deformed due to pressure applied to the container body, the screw is not loose. However, the possibility of leakage of the liquid sealed inside from between the cap and the mouth on the container side has not been improved.

  In this way, for example, when pressure is applied to the container body in a screwed state and the container body is deformed, the liquid sealed inside leaks from between the cap and the mouth on the container side in the loosely screwed state. The risk of coming out was a problem particularly in hot water bottles used in a state in which a liquid was enclosed, and in beverage containers carried in a state in which a liquid was enclosed.

Japanese Utility Model Publication No. 5-35690

  Therefore, in the present invention, a screw structure that can ensure a reliable screwing strength while reducing the screwing amount, and a liquid that can be used safely by reducing the risk of leakage of the liquid enclosed in the screwed state. An object is to provide a lid structure for an enclosure.

  The present invention is a screwing structure in which a first member having a cylindrical inner peripheral surface and a cylindrical second member having an outer peripheral surface having a smaller diameter than the inner peripheral surface of the first member are screwed together. The second member is formed in a ring shape having a cylindrical inner peripheral surface, and an outer periphery having a smaller diameter than the inner peripheral surface of the second member is formed on the inner side of the inner peripheral surface of the first member. A cylindrical first inner cylindrical portion having a surface, the outer peripheral surface of the second member having a spiral second outer peripheral side screw portion, and the inner peripheral surface of the second member having a spiral first 2 provided with a first outer threaded portion that engages with the second outer peripheral threaded portion on the inner peripheral surface of the first member, and on the outer peripheral surface of the first inner cylindrical portion. A first inner threaded portion that engages with the second inner circumferential threaded portion; The screw member and the first outer screw portion, and the second inner peripheral screw portion and the first inner screw portion are locked, and the first member and the second member are screwed together. To do.

  According to the configuration of the present invention, in the threaded connection between the first member and the second member, the second outer peripheral side screw portion and the first outer screw portion, and the second inner peripheral side screw portion and the first inner screw portion are engaged. The first member and the second member can be screwed together by stopping. As a result, since the two sets of screw parts are locked to each other, as compared with a normal screwing structure in which only the screw parts corresponding to the second outer peripheral screw part and the first outer screw part are locked and screwed together. The screwing strength against the tensile force in the direction of pulling out the first member and the second member can be improved.

  Therefore, according to the configuration of the present invention, since the same screwing strength can be ensured with a small screwing amount as compared with the normal screwing structure, the screw part forming section provided with the screw part can be formed short, and the screwing direction. A short threaded structure can be formed.

Therefore, an article having the screwed structure can be reduced in size.
Moreover, since the same screwing strength can be ensured with a small screwing amount, the screwing work can be reduced, and the satisfaction of the user who uses this screwing structure can be improved.

  The present invention also includes a cylindrical opening that is formed in a liquid enclosure that encloses a liquid, communicates the inside and the outside of the liquid enclosure, and projects in a cylindrical shape from the liquid enclosure, and the cylindrical opening A lid structure for a liquid enclosure comprising a sealing cap portion for sealing a portion, wherein a spiral body-side screw portion is formed on the outer peripheral surface of the cylindrical opening portion, and the cylindrical opening portion A spiral main body side internal thread portion is formed on the inner peripheral surface, the cylindrical opening is the second member, the main body side thread portion is the second outer peripheral thread portion, and the main body side internal thread portion is The second inner peripheral side threaded portion, and the sealing cap portion is arranged on the inner side of the cap main body portion, the outer ring portion projecting in a ring shape from the cap main body portion, and the inner diameter of the outer ring portion. It is integrated with the inner cylindrical part whose diameter is smaller than the inner diameter of the opening. A cap-side screw that is engaged with the body-side inner threaded portion on the outer peripheral surface of the inner cylindrical portion, and a cap-side threaded portion that is engaged with the body-side threaded portion is formed on the inner circumferential surface of the outer ring portion. Forming the sealing cap portion as the first member, the inner cylindrical portion as the first inner cylindrical portion, the cap-side screw portion as the first outer screw portion, and the cap-side inner screw portion. As the first inner threaded portion, and the cylindrical opening and the sealing cap portion are screwed together so as to be sealable by using the above-described screwing structure.

The liquid may be water, hot water, a beverage, or a heat-retaining gel.
The liquid enclosure may be a hot water bottle, a beverage container, a water bottle, or the like.
According to the configuration of the present invention, inadvertent liquid leakage from the cylindrical opening of the liquid sealed in the liquid sealing portion can be prevented.

Specifically, in the threaded engagement between the sealing cap part and the cylindrical opening, in addition to the locking of the main body side external thread part and the cap side external thread part, the main body side internal thread part and the cap side internal thread part are engaged. Therefore, the screwing strength between the sealing cap and the cylindrical opening is improved.
Therefore, the adhesion between the sealing cap portion and the cylindrical opening can be improved, and a reliable liquid leakage preventing effect can be obtained.

  In addition, since the cylindrical opening is provided with the main body side external thread portion and the main body side internal thread portion, and the sealing cap portion is provided with the cap side external screw portion and the cap side internal thread portion, the cylindrical opening portion is sealed. By simply screwing the stop cap portion, the main body side external screw portion and the cap side external screw portion can be locked, and the main body side internal screw portion and the cap side internal screw portion can be locked.

  As described above, since the liquid leakage prevention performance can be reinforced by only one operation of screwing the sealing cap portion into the cylindrical opening, for example, compared with the case where the liquid leakage prevention performance is reinforced by different operations. Therefore, convenience is high and user satisfaction can be improved.

Furthermore, since the same screwing strength can be ensured with a small screwing amount, the screwing work can be reduced compared to a cover structure that only locks the main body side external thread part and the cap side external thread part. The satisfaction of the user who uses this lid structure can be improved.
Further, since the same screwing strength can be ensured with a small screwing amount, the height of the cylindrical opening and the sealing cap portion that can secure the desired screwing strength can be suppressed and the size can be reduced.

  As an aspect of the present invention, at least one of the inner peripheral surface of the outer ring portion, the outer peripheral surface of the inner cylindrical portion, the inner peripheral surface of the cylindrical opening, and the outer peripheral surface of the cylindrical opening is sealed. It can form with the inclined surface inclined with respect to the fitting direction of a cap part and the said cylindrical opening part.

  With the configuration of the present invention, the liquid leakage prevention performance is reinforced by the wedge effect corresponding to the screwing of the sealing cap portion and the cylindrical opening portion, and the liquid opening portion is more reliably sealed in the liquid sealing portion. Inadvertent liquid leakage can be reliably prevented.

  Furthermore, this invention is provided with a spiral first screw portion on the inner peripheral surface of the first member having a cylindrical inner peripheral surface, and a cylindrical shape having a smaller diameter than the inner peripheral surface of the first member. The second member having the outer peripheral surface is provided with a second screw portion that is engaged with the first screw portion, and the first screw portion and the second screw portion are engaged with each other. Using a threaded structure in which a member and the second member are screwed together, formed in a liquid enclosing portion that encloses liquid, communicates the inside and outside of the liquid enclosing portion, and protrudes in a cylindrical shape from the liquid enclosing portion The liquid-enclosed body lid structure includes a cylindrical opening portion and a sealing cap portion that seals the cylindrical opening portion, and has a spiral body-side screw portion on the outer peripheral surface of the cylindrical opening portion. The cylindrical opening is used as the second member, and the body-side screw portion is As the second threaded portion, the sealing cap portion is integrally formed of a cap main body portion and a ring portion protruding in a ring shape from the cap main body portion, and the inner peripheral surface of the ring portion is connected to the main body side. A cap-side screw portion that is engaged with the screw portion is formed, the sealing cap portion is the first member, the cap-side screw portion is the first screw portion, and the cylindrical opening is formed by the screwing structure. And a sealing cap portion that can be sealed so as to be capable of being sealed, and provided with a liquid leakage preventing reinforcing means that reinforces a liquid leakage preventing performance that prevents liquid leakage from the sealed cylindrical opening. To do.

According to the configuration of the present invention, inadvertent liquid leakage from the cylindrical opening of the liquid sealed in the liquid sealing portion can be prevented.
Specifically, the first member having a cylindrical inner peripheral surface is provided with a spiral first screw portion on the inner peripheral surface, and a cylindrical outer peripheral surface having a smaller diameter than the inner peripheral surface of the first member. A second screw part that is engaged with the first screw part is provided on the outer peripheral surface of the second member, and the first member and the second screw part are engaged with each other by engaging the first screw part and the second screw part. Since the cylindrical opening is sealed with the sealing cap portion by using a screwing structure in which the two members are screwed together, leakage of the sealed liquid from the cylindrical opening can be prevented.

  Further, for example, even when the internal pressure is increased due to deformation of the liquid sealing portion, etc., the liquid leakage prevention performance is enhanced by screwing the cylindrical opening and the sealing cap portion so that they can be sealed. By providing the liquid leakage prevention reinforcing means, it is possible to reliably prevent inadvertent liquid leakage from the cylindrical opening of the liquid enclosed in the liquid enclosure.

  As an aspect of the present invention, the liquid leakage prevention reinforcing means increases the adhesion between the sealing cap portion and the cylindrical opening according to the screwing of the sealing cap portion and the cylindrical opening. It can be composed of adhesion improving means.

  According to the configuration of the present invention, in the screwed state of the sealing cap portion that locks the main body side screw portion and the cap side screw portion and the cylindrical opening portion, The liquid leakage prevention performance can be reliably reinforced by means of an adhesion improving means having a simple structure that improves the adhesion to the cylindrical opening. Therefore, liquid leakage can be reliably prevented with a simple structure.

  As an aspect of the present invention, an intermediate cap is provided that covers the opening end on the outside of the cylindrical opening, and the adhesion improving means is screwed between the sealing cap and the cylindrical opening. Depending on the condition, the adhesiveness between the inner cap and the opening end on the outside of the cylindrical opening can be increased.

According to the configuration of the present invention, it is possible to improve the liquid leakage prevention performance in a screwed state between the sealing cap portion and the cylindrical opening portion, thereby reliably preventing liquid leakage.
Specifically, since a middle cap that closes the opening end on the outside of the cylindrical opening is fitted inside the sealing cap, the liquid leaks compared to the case where only the sealing cap is attached. Prevention performance can be improved.

  Further, according to the screwing of the sealing cap portion and the cylindrical opening portion, the adhesion between the inner cap and the opening end portion outside the cylindrical opening portion is increased, and the liquid leakage prevention performance is more surely achieved. Can be improved.

  Further, as an aspect of the present invention, the liquid leakage prevention reinforcing means is provided with an opening end of the cylindrical opening inside the liquid sealing portion in accordance with screwing between the sealing cap portion and the cylindrical opening. It can be constituted by an opening closing means for closing the part.

  According to the configuration of the present invention, it is possible to improve the liquid leakage prevention performance in a state where the sealing cap portion and the cylindrical opening are screwed together, and reliably prevent liquid leakage from the cylindrical opening.

  Specifically, the outer opening end of the cylindrical opening is sealed with the sealing cap to prevent liquid leakage, and the inner opening end of the cylindrical opening inside the liquid enclosure is closed with the opening closing means. Therefore, both the inner and outer ends of the cylindrical opening can be sealed to reliably prevent liquid leakage. That is, since the inner and outer sides of the opening end are double sealed, it is possible to reinforce the effect of preventing liquid leakage from each other and reliably prevent liquid leakage from the cylindrical opening.

  In addition, since the liquid leakage prevention performance can be reinforced by only one operation of screwing the sealing cap portion into the cylindrical opening in this way, for example, when the liquid leakage prevention performance is reinforced by different operations. Compared with this, convenience is high and user satisfaction can be improved.

  Further, as an aspect of the present invention, the opening closing means approaches the opening end portion and covers the opening end portion in accordance with the screwing of the sealing cap portion and the cylindrical opening portion. Can be configured.

According to the configuration of the present invention, it is possible to improve the liquid leakage prevention performance in a state where the sealing cap portion and the cylindrical opening are screwed together, and reliably prevent liquid leakage from the cylindrical opening.
In addition, since the covering and closing means is configured to cover the opening end portion so as to cover, for example, even when the internal pressure increases due to the deformation of the liquid sealing portion, the covering closing means and the opening end portion are caused by the internal pressure. As a result, the liquid leakage from the cylindrical opening can be prevented.

  According to the present invention, the first member having a cylindrical inner peripheral surface is provided with a spiral first screw portion on the inner peripheral surface, and the cylindrical member has a smaller diameter than the inner peripheral surface of the first member. The second member having an outer peripheral surface is provided with a second screw portion that is engaged with the first screw portion on the outer peripheral surface, and the first screw portion and the second screw portion are engaged with each other. And the second member are screwed together to form a liquid enclosing portion for enclosing the liquid, and the inside and outside of the liquid enclosing portion are communicated with each other from the liquid enclosing portion to the inside in a cylindrical shape. A lid structure for a liquid enclosure comprising a protruding inner cylindrical opening and a sealing cap that seals the inner cylindrical opening, the inner cylindrical surface of the inner cylindrical opening having a spiral shape And forming the inner cylindrical opening as the first member, and The main body side screw portion is the first screw portion, and the sealing cap portion is integrally formed of a cap main body portion and a ring portion protruding in a ring shape from the cap main body portion, and on the outer peripheral surface of the ring portion, While forming a cap side screw portion to be locked to the main body side screw portion, forming a cap side inner screw portion on the inner peripheral surface of the ring portion, and using the sealing cap portion as the second member, The cap-side screw portion is a second screw portion, and the inner cylindrical opening and the sealing cap portion are screwed together by the screwing structure so as to be able to be sealed, from the sealed inner cylindrical opening. As the liquid leakage prevention reinforcing means for reinforcing the liquid leakage prevention performance for preventing liquid leakage, the cap-side inner screw portion is screwed according to the screwing between the sealing cap portion and the inner cylindrical opening portion, and the Inside the liquid enclosure Close to the open end of the serial inner cylindrical opening may be provided with a coating closing means covering the opening end.

  According to the configuration of the present invention, it is possible to improve the liquid leakage prevention performance in a state where the sealing cap portion and the inner cylindrical opening are screwed together, and reliably prevent the liquid leakage from the inner cylindrical opening. .

  Specifically, the sealing cap portion seals the opening end portion outside the opening portion to prevent liquid leakage, and the opening blocking means closes the opening end portion inside the inner cylindrical opening portion inside the liquid sealing portion, Since it closes with the covering closure means that closes and covers, both the inner and outer ends of the inner cylindrical opening can be sealed to reliably prevent liquid leakage. That is, since the inner and outer sides of the opening end are double sealed, it is possible to reinforce the effect of preventing liquid leakage from each other and reliably prevent liquid leakage from the cylindrical opening.

  In addition, since the covering and closing means is configured to cover the opening end portion so as to cover, for example, even when the internal pressure increases due to the deformation of the liquid sealing portion, the covering closing means and the opening end portion are caused by the internal pressure. As a result, the liquid leakage from the inner cylindrical opening can be prevented.

  In addition, since the liquid leakage prevention performance can be reinforced by only one operation of screwing the sealing cap portion into the cylindrical opening in this way, for example, when the liquid leakage prevention performance is reinforced by different operations. Compared with this, convenience is high and user satisfaction can be improved.

  Further, as an aspect of the present invention, a circular fitting that is concentric with the cylindrical opening and fitted in the screwing direction is provided on the outer diameter side of the cylindrical opening and the corresponding portion of the sealing cap. Means may be provided.

  The circular fitting means for fitting in the screwing direction includes a fitting portion that is concave in the screwing direction with respect to the fitting portion that is convex in the screwing direction, and a screw that is recessed in the screwing direction. A fitting portion that is convex in the insertion direction or a plurality of fitting portions that are convex and concave in the screwing direction and are configured to be concave and convex in the screwing direction. Can do.

  With the configuration of the present invention, a circular fitting means that is concentric with the cylindrical opening and fitted in the screwing direction in a state where the sealing cap and the cylindrical opening are screwed together is fitted. Therefore, the liquid leakage prevention performance by the sealing cap part and the cylindrical opening part can be further improved.

  In the present invention, the screwing structure that can ensure a reliable screwing strength while reducing the screwing amount, and the liquid sealing that can be used safely by reducing the risk of leakage of the liquid sealed inside when screwed. A body lid structure can be provided.

Explanatory drawing about the high water-stop cap structure of 1st embodiment. The longitudinal cross-sectional view about the high water-stop cap structure of 1st embodiment. Explanatory drawing about the variation of the high water-stop cap structure of 1st embodiment. Explanatory drawing about the variation of the high water-stop cap structure of 1st embodiment. Explanatory drawing about the high water-stop cap structure of 2nd embodiment. Explanatory drawing about the variation of the high water-stop cap structure of 2nd embodiment. Explanatory drawing about the high water-stop cap structure of 3rd embodiment. Explanatory drawing about the high water-stop cap structure of 3rd embodiment. Explanatory drawing about the high water-stop cap structure of 4th embodiment. Explanatory drawing about the high water-stop cap structure of 4th embodiment. Explanatory drawing about the variation of the high water-stop cap structure of 4th embodiment. Explanatory drawing about the high water-stop cap structure of 5th embodiment. Explanatory drawing about the high water-stop cap structure of 6th embodiment. Explanatory drawing about the high water-stop cap structure of 6th embodiment. Explanatory drawing about the high water-stop cap structure of 7th embodiment. Explanatory drawing about the high water-stop cap structure of 7th embodiment. Explanatory drawing about the high water-stop cap structure of another form in 7th embodiment. Explanatory drawing about the high water-stop cap structure of another form in 7th embodiment. Explanatory drawing about the high water-stop cap structure of another form in 7th embodiment. Explanatory drawing about the high water-stop cap structure of another form in 7th embodiment. Explanatory drawing about a high intensity | strength screwing structure. Explanatory drawing about the conventional screwing structure. Explanatory drawing by sectional drawing which compares a high intensity | strength screwing structure and the conventional screwing structure.

An embodiment of the present invention will be described below with reference to the drawings.
(First embodiment)
The high water-stop cap structure 1 in the first embodiment is configured as shown in FIGS.
In addition, FIG. 1 shows the explanatory view by the perspective view about the high water-stop cap structure 1 of 1st embodiment, FIG. 2 has shown the longitudinal cross-sectional view about the high water-stop cap structure 1 of 1st embodiment.

  1A shows a perspective view of the high water-stop cap structure 1 in a state before screwing of the water-stop cap 10 whose internal structure is indicated by a dotted line, and FIG. 1B shows a water-stop cap 10 and a cylindrical opening. The explanatory drawing by the perspective view of the high water-stop cap structure 1 which notched a part of 20 in the depth direction center is shown.

  The high water-stop cap structure 1 includes a cylindrical opening 20 provided in the upper part of the water storage tank portion 2 and a water-stop cap 10 that is screwed into the cylindrical opening 20. In addition, in this specification, although the water storage tank part 2 is not limited, the water storage tank part 2 can be comprised by the main-body part of a hot water bottle or a water bottle, for example.

The cylindrical opening 20 is formed integrally with the water tank 2 made of polycarbonate, and is a cylindrical opening that communicates the inside 2a and the outside of the water tank 2 with the outer peripheral surface 20a and the inner peripheral surface 20b. A spiral main body side thread 21 (main body side outer thread 21a, main body side inner thread 21b) is provided.
In addition, the main body side outer thread 21a formed on the outer peripheral surface 20a and the main body side inner thread 21b formed on the inner peripheral surface 20b are formed in the same spiral angle by the same number.

  The water stop cap 10 is a cap that is screwed into the cylindrical opening 20 to seal the opening of the water storage tank portion 2. The water stop cap 10 has a circular upper surface 11 that is circular in plan view and an outer surface from the bottom surface 11 a of the circular upper surface 11. A ring-shaped outer ring portion 12 that protrudes downward along the peripheral edge and an inner ring portion 13 that is disposed on the inner side of the outer ring portion 12 at an appropriate interval are integrally configured.

  A spiral cap-side thread 14 (cap side) is respectively formed on an inner peripheral surface 12a of the outer ring portion 12 facing the inner ring portion 13 and an outer peripheral surface 13a of the inner ring portion 13 facing the outer ring portion 12. An outer thread 14a and a cap-side inner thread 14b).

  The cap-side outer thread 14a formed on the inner peripheral surface 12a of the outer ring part 12 is engaged with the main body-side outer thread 21a, and the cap-side inner thread formed on the outer peripheral surface 13a of the inner ring part 13. Since 14b is engaged with the above-described main body side internal thread 21b, the main body side external thread 21a, the main body side internal thread 21b, the cap side external thread 14a, and the cap side internal thread 14b are formed at the same spiral angle. At the same time, the cap-side outer thread 14a and the cap-side inner thread 14b are formed in the same number.

  A ring-shaped ring packing 15 is provided between the upper end of the outer ring portion 12 and the upper end of the inner ring portion 13 along the bottom surface 11a. The ring packing 15 is made of rubber having high elasticity, deformability, and water-stopping property.

  As shown in FIG. 2, the high water-stop cap structure 1 configured as described above locks the cap-side outer thread 14a and the main-body-side outer thread 21a, and the cap-side inner-thread 14b and the main-body-side inner thread. The water stop cap 10 can be screwed to the cylindrical opening 20 by engaging the mountain 21b.

  At this time, the upper end 20c of the cylindrical opening 20 is brought into close contact with the bottom surface of the ring packing 15 according to the screwing amount of the water stop cap 10, and the ring packing 15 is deformed, so that the upper end opening portion of the cylindrical opening 20 is deformed. Is sealed by the ring packing 15 and the water stop cap 10. As described above, in this embodiment, the ring packing 15 and the water stop cap 10 that seal the upper end opening portion of the cylindrical opening 20 function as a liquid leakage prevention unit in the high water stop cap structure 1.

  Further, as in the case of a normal cap, compared to the case where only the cap-side outer thread of the water-stopping cap and the main-body-side outer thread of the cylindrical opening are locked and screwed together, the high water-stop cap structure 1 Since the watertight cap 10 and the cylindrical opening 20 are screwed together, the cap-side inner screw thread 14b and the main body-side inner screw thread 21b are locked, so that the screwing strength is improved.

  Therefore, the screw-engagement strength between the water-stop cap 10 of the high water-stop cap structure 1 and the cylindrical opening 20 is improved, and the cap-side inner thread 14b and the main-body-side inner thread 21b function as liquid leakage prevention reinforcing means. By the locking, the adhesion between the ring packing 15 and the opening upper end 20c can be enhanced. Thereby, the liquid leak prevention performance of the high water-stop cap structure 1 can be improved, and the liquid leak of the liquid enclosed in the water storage tank part 2 can be prevented reliably.

  In addition, the liquid between the ring packing 15 and the opening upper end 20c is locked by the cap-side inner thread 14b and the body-side inner thread 21b by only one operation of screwing the water-stop cap 10 into the cylindrical opening 20. Leakage prevention performance can be reinforced by increasing adhesion. Therefore, for example, compared with the case where the liquid leakage prevention performance is reinforced by different operations, the convenience is high and the satisfaction of the user can be improved.

  Further, the screw-tightening strength between the water-stop cap 10 of the high water-stop cap structure 1 and the cylindrical opening 20 is improved, and the cap-side inner thread 14b and the main-body side inner thread 21b function as a liquid leakage prevention reinforcing means. By locking, the adhesion between the ring packing 15 and the upper end 20c of the opening can be enhanced. Therefore, compared with the case where the liquid leakage prevention performance is reinforced in a separate process, the convenience is high and the satisfaction of the user is increased. Can be improved.

  Even if the ring packing 15 is not provided, the upper end opening portion of the cylindrical opening 20 is covered with the water stop cap 10 due to the adhesion between the upper end portion 20c of the cylindrical opening 20 and the bottom surface 11a of the circular upper surface 11 of the water stop cap 10. The structure which seals may be sufficient and the structure which improves the adhesiveness of the opening upper end part 20c and the bottom face 11a with the screwing amount of the water stop cap 10 with respect to the cylindrical opening 20 may be sufficient.

  Furthermore, as shown in FIG. 3 and FIG. 4, any one of the water stop cap 10 and the cylindrical opening 20 may be configured as an inclined surface, and the screwing strength may be improved by the wedge effect. .

  Specifically, as shown in FIG. 3 (a), the inner peripheral surface 12a of the outer ring portion 12 is reduced in diameter toward the upper side with respect to the outer peripheral surface 20a which is a vertical surface, that is, the cross section of the C in front view. You may comprise by the inclined surface which becomes.

  Thereby, the cap side outer thread 14a and the main body side outer thread 21a are locked, and the cap side inner thread 14b and the main body side inner thread 21b are locked, that is, two sets of threads are engaged. When the water stop cap 10 is screwed to the cylindrical opening 20, the liquid leak prevention performance of the high water stop cap structure 1 is improved, and the liquid leaked in the water storage tank portion 2 is surely leaked. In addition to the above-mentioned effect of being able to prevent, the liquid leakage prevention performance is further improved by the wedge effect according to the screwing by the inner peripheral surface 12a constituted by the inclined surface and the outer peripheral surface 20a of the cylindrical opening 20. be able to.

  Similarly, as shown in FIG. 3 (b), the inner peripheral surface 12a, which is a vertical surface, has an outer peripheral surface 20a whose diameter is increased downward, that is, an inclined surface having a cross section in a front view. Even so, it is possible to improve the liquid leakage prevention performance by the similar wedge effect.

  Furthermore, as shown in FIG. 4 (a), the outer peripheral surface 13a is increased in diameter upward with respect to the inner peripheral surface 20b which is a vertical surface, that is, an inclined surface having a reverse C-shaped cross section when viewed from the front. It may be configured. On the other hand, as shown in FIG. 4B, the inner peripheral surface 20b is reduced in diameter toward the lower side with respect to the outer peripheral surface 13a which is a vertical surface, that is, an inclined surface having a reverse C-shaped cross section when viewed from the front. It may be configured. Even in the case of such a configuration, it is possible to improve the liquid leakage prevention performance by the similar wedge effect.

  In the following, high water-stop cap structures 1 ′, 1 ″, 1A, 1B, 1C, 1D, 1E, 1F, and 1F ′ according to other embodiments will be described. , 1 ″, 1A, 1B, 1C, 1D, 1E, 1F, 1F ′, the same components as those of the high water-stop cap structure 1 in the first embodiment described above are denoted by the same reference numerals. The description is omitted.

(Second embodiment)
As shown in FIG. 5, the high water-stop cap structure 1 </ b> A according to the second embodiment includes a cylindrical opening 40 provided at an upper portion of the water storage tank portion 2 and a water-stop cap 30 that is screwed into the cylindrical opening 40. is doing. 5A is an explanatory diagram showing a perspective view of the high water-stop cap structure 1A in which a part of the water-stop cap 30 and the cylindrical opening 40 is cut out at the center in the depth direction, and FIG. The longitudinal cross-sectional view about the water-stop cap structure 1A is shown.

  The cylindrical opening 40 is formed integrally with the water tank 2 made of polycarbonate, and is a cylindrical opening that communicates the inside 2a and the outside of the water tank 2 with a spiral thread on the outer peripheral surface 40a. 41 is provided.

  The water stop cap 30 is a cap that is screwed into the cylindrical opening 40 and seals the opening of the water storage tank portion 2. The water stop cap 30 is external to the circular upper surface 31 that is circular in plan view and the bottom surface 31 a of the circular upper surface 31. A ring-shaped ring portion 32 projecting downward along the peripheral edge, and an inverted frustoconical inner plug portion 33 that decreases in diameter toward the center of the bottom surface 31a of the circular upper surface 31. ing.

  The inner circumferential surface 32a of the ring portion 32 is provided with a spiral cap-side screw thread 34 that engages with the main-body screw thread 41, and the main-body screw thread 41 and the cap-side screw thread 34 have the same spiral angle. It is formed with.

  The inner plug portion 33 is made of rubber having high elasticity, deformability, and water blocking properties, and has a lower end 33b smaller than the upper end opening portion of the cylindrical opening 40 and an upper end 33a larger than the upper end opening portion of the cylindrical opening 40. It has an inverted truncated cone shape.

  A ring-shaped ring packing 15 is provided between the upper end of the ring portion 32 and the upper end 33a of the inner plug portion 33 so as to follow the bottom surface 31a. The ring packing 15 is made of rubber having high elasticity, deformability, and water-stopping property.

  As shown in FIG. 5 (b), the high water-stop cap structure 1 </ b> A configured in this manner locks the cap-side screw thread 34 and the main-body screw thread 41, and stops water with respect to the cylindrical opening 40. The cap 30 can be screwed.

  At this time, the opening upper end portion 40c of the cylindrical opening 40 is brought into close contact with the bottom surface of the ring packing 15 according to the screwing amount of the water stop cap 30, and the ring packing 15 is deformed, so that the upper end opening portion of the cylindrical opening 40 is deformed. Is sealed by the ring packing 15 and the water stop cap 30.

  Further, by screwing the water stop cap 30 and the cylindrical opening 40, the inner plug portion 33 is inserted into the cylindrical opening 40 from the upper end opening portion, and the inner plug portion 33 formed in an inverted truncated cone shape is shown in FIG. As shown in b), the cylindrical opening 40 is deformed and closely adhered along the inner peripheral surface 40b, and the upper end opening portion of the cylindrical opening 40 is sealed in a substantially sealed state. Thereby, the liquid leak prevention performance of 1 A of high water-stop cap structures can be improved, and the liquid leak of the liquid enclosed with the water storage tank part 2 can be prevented reliably.

  Specifically, the high water-stop cap structure 1 </ b> A has the effect of preventing liquid leakage due to the close contact between the upper end portion 40 c of the cylindrical opening 40 and the bottom surface of the ring packing 15 due to the screwing strength between the water-stop cap 30 and the cylindrical opening 40. An inner plug that is inserted into the cylindrical opening 40 from the upper end opening portion, is deformed and closely adhered along the inner peripheral surface 40b of the cylindrical opening 40, and seals the upper end opening portion of the cylindrical opening 40 in a substantially sealed state. Due to the double leakage prevention effect of the portion 33 and the leakage prevention effect, the leakage prevention functions can be mutually reinforced and the leakage of the liquid sealed in the water storage tank portion 2 can be reliably prevented.

  Further, the high water-stop cap structure 1 </ b> A has a liquid leakage prevention effect due to the close contact between the upper end portion 40 c of the cylindrical opening 40 and the bottom surface of the ring packing 15 due to the screwing strength between the water-stop cap 30 and the cylindrical opening 40. An inner plug portion that is inserted into the cylindrical opening 40 from the upper end opening portion, deforms and adheres along the inner peripheral surface 40b of the cylindrical opening 40, and seals the upper end opening portion of the cylindrical opening 40 in a substantially sealed state. Since the liquid leakage prevention effect of 33 mutually reinforces the liquid leakage prevention function, it is more convenient than the case where the liquid leakage prevention performance is reinforced in a separate process, and the user satisfaction is improved. Can be improved.

As shown in FIG. 6, the inner peripheral surface 32 a of the ring portion 32 may be configured as an inclined surface, and the cylindrical opening 40 may be provided with an inverted triangular cutout portion 43.
Specifically, as shown in FIG. 6 (a), the inner peripheral surface 32a of the ring portion 32 is configured with an inclined surface that is reduced in diameter toward the upper side, that is, has a cross-section in a front view.

  The notch 43 is a notch that allows the cylindrical opening 40 on both sides of the notch 43 to fall down and is formed at an angle corresponding to the inclination angle of the inner peripheral surface 32a. In addition, the notch part 43 is arrange | positioned so that it may become above the lower end of the ring part 32 of the state which screwed the water stop cap 30 to the cylindrical opening 40. FIG.

  With this configuration, the cylindrical openings 40 on both sides sandwiching the notch 43 are collapsed and deformed due to the wedge effect of the inner peripheral surface 32a formed by the inclined surface with respect to the outer peripheral surface 40a which is a vertical surface in the cylindrical opening 40, and the upper end Adhesiveness with the inside plug part 33 inserted inside the cylindrical opening 40 from the opening part is improved. Thereby, the liquid leakage prevention performance of 1 A of high water-stop cap structures can be improved, and the liquid leakage of the liquid enclosed with the water storage tank part 2 can be prevented further more reliably.

  In addition, in the said Example, although the internal peripheral surface 32a of the water stop cap 30 was comprised with the inclined surface with respect to the outer peripheral surface 40a of the cylindrical opening 40 which is a perpendicular | vertical surface, the inner peripheral surface 32a which is a perpendicular | vertical surface is formed. On the other hand, the outer peripheral surface 40a of the cylindrical opening 40 may be inclined to obtain a wedge effect, and both may be configured as inclined surfaces. Even in such a case, the liquid leakage prevention function can be mutually reinforced by the double liquid leakage prevention effect, and the liquid leakage of the liquid sealed in the water storage tank unit 2 can be reliably prevented.

  Even if the ring packing 15 is not provided, the upper end opening portion of the cylindrical opening 40 is covered with the water stop cap 30 due to the adhesion between the upper end portion 40c of the cylindrical opening 40 and the bottom surface 31a of the circular upper surface 31 of the water stop cap 30. The structure which seals may be sufficient and the structure which improves the adhesiveness of the opening upper end part 40c and the bottom face 11a with the screwing amount of the water stop cap 30 with respect to the cylindrical opening 40 may be sufficient.

(Third embodiment)
As shown in FIGS. 7 and 8, the high water-stop cap structure 1 </ b> B according to the third embodiment includes a cylindrical opening 40 ′ provided in the upper part of the water storage tank 2 and a water-stop cap screwed into the cylindrical opening 40 ′. 30 '.

  FIG. 7 shows an explanatory view based on a perspective view of the high water-stop cap structure 1B of the first embodiment, and FIG. 8 shows an explanatory view based on a perspective view and a longitudinal sectional view of the high water-stop cap structure 1B. Yes.

  Specifically, FIG. 7A shows a perspective view of the high water-stop cap structure 1B in a state before the water-stop cap 30 ′ and the inner cap 50 are attached to the cylindrical opening 40 ′, and FIG. Shows a perspective view of a highly water-stop cap structure 1B in which a part of the water-stop cap 30 ′, the inner cap 50 and the cylindrical opening 40 ′ in the same state is cut out at the center in the depth direction.

  8A shows a perspective view of the high water-stop cap structure 1B in a state where the inner cap 50 is attached to the cylindrical opening 40 ′, and FIG. 8B shows the inner cap 50 and the cylindrical opening in the same state. A perspective view of the high water-stop cap structure 1B in which a part of 40 ′ is cut out at the center in the depth direction is shown, and FIG. 8C shows a longitudinal sectional view of the high water-stop cap structure 1B.

  The cylindrical opening 40 ′ is a cylindrical opening integrally formed with the water tank 2 made of polycarbonate and communicating the inside 2 a and the outside of the water tank 2, and has a spiral body-side screw on the outer peripheral surface 40 a. A mountain 41 is provided. The side surface of the opening upper end portion 40c has a locking groove 45 that allows the locking of the engagement convex portion 52b of the inner cap 50, which will be described later, and the upper surface of the opening upper end portion 40c has a convex protrusion that has an arcuate section. The portion 46 is provided in a ring shape in plan view (see FIG. 8 (c) a portion enlarged view).

  The water stop cap 30 ′ is a cap that is screwed into the cylindrical opening 40 ′ to seal the opening of the water storage tank unit 2. The water stop cap 30 ′ is a circular upper surface 31 that is circular in plan view, and a bottom surface 31 a of the circular upper surface 31. And a ring-shaped ring portion 32 that projects downward along the outer peripheral edge from a plane.

  The inner circumferential surface 32a of the ring portion 32 is provided with a spiral cap-side screw thread 34 that engages with the main-body screw thread 41, and the main-body screw thread 41 and the cap-side screw thread 34 have the same spiral angle. It is formed with.

The inner cap 50 is an intermediate cap that is fitted inside the upper end portion 40c of the cylindrical opening 40 ′ and covers the upper end opening portion of the cylindrical opening 40 ′ inside the water stop cap 30 ′.
The inner cap 50 includes a circular upper surface 51 that is circular in plan view and a ring-shaped ring portion 52 that projects downward from the bottom surface 51a of the circular upper surface 51 along the outer peripheral edge. Made in one piece.

Note that an engagement convex portion 52 b that engages with the aforementioned engagement groove 45 is formed on the inner peripheral surface 52 a of the ring portion 52.
The inner cap 50 is formed with the same diameter as the cylindrical opening 40 ′. Therefore, when the inner cap 50 is attached to the upper end portion 40c of the opening, the outer peripheral surface 40a of the cylindrical opening 40 'and the ring portion 52 of the inner cap 50 are flush with each other. Can be used in a sanitary manner.

  As shown in FIG. 8A, the high water-stop cap structure 1B configured as described above has a cylindrical shape in which an inner cap 50 is attached to the opening upper end portion 40c of the cylindrical opening 40 ′ and covered from the outside. A water-stop cap 30 'can be screwed onto the opening 40' (see FIG. 8C).

  Specifically, the cylindrical opening 40 ′ may be mounted so that the locking groove 45 of the cylindrical opening 40 ′ and the engaging convex portion 52b of the inner cap 50 are locked to cover the upper end of the cylindrical opening 40 ′ from above. it can. At this time, the biting convex portion 46 formed on the opening upper end portion 40 c comes into contact with the bottom surface 51 a of the circular upper surface 51 of the inner cap 50.

  In this state, the cap-side thread 34 and the body-side thread 41 are locked so as to cover the inner cap 50 from above, and the water-stop cap 30 'is screwed into the cylindrical opening 40'.

  Further, the bottom surface 31a of the circular upper surface 31 presses the circular upper surface 51 of the inner cap 50 from above by screwing the water stop cap 30 'and the cylindrical opening 40'. Therefore, the close contact degree between the opening upper end portion 40c and the inner cap 50 can be increased, and the upper end opening portion of the cylindrical opening 40 'can be sealed.

  Further, the biting convex portion 46 formed on the opening upper end portion 40 c bites into the bottom surface 51 a of the circular upper surface 51 pressed downward by the circular upper surface 31, so that the inner cap 50 projects from the upper end opening portion of the cylindrical opening 40 ′. Liquid leakage can be reliably prevented.

  As described above, the high water-stop cap structure 1B includes the sealing of the cylindrical opening 40 ′ by screwing the water-stop cap 30 ′ and the cylindrical opening 40 ′, and the inner cap 50 fitted to the upper end portion 40c of the opening. There is a double liquid leakage prevention effect by sealing the cylindrical opening 40 '.

  Further, since the bottom surface 31a of the circular upper surface 31 presses the circular upper surface 51 in accordance with the screwing amount of the water stop cap 30 ′, the cylindrical opening 40 ′ is sealed by the inner cap 50 fitted to the opening upper end portion 40c. Make sure.

  In addition, by pressing the circular upper surface 51 by the bottom surface 31a of the circular upper surface 31 according to the screwing amount of the water stop cap 30 ′, the biting convex portion 46 bites into the bottom surface 51a, thereby improving the liquid leakage prevention performance, Liquid leakage of the liquid sealed in the water storage tank unit 2 can be reliably prevented.

  As described above, the high water-stop cap structure 1B includes the sealing of the cylindrical opening 40 ′ by screwing the water-stop cap 30 ′ and the cylindrical opening 40 ′, and the inner cap 50 fitted to the upper end portion 40c of the opening. There is a double liquid leakage prevention effect by sealing the cylindrical opening 40 '.

  Furthermore, the high water-stop cap structure 1B includes an inner cap 50 fitted to the upper end portion 40c of the opening due to the bottom surface 31a of the circular top surface 31 pressing the circular top surface 51 according to the screwing amount of the water stop cap 30 ′. The cylindrical opening 40 ′ is surely sealed, and the biting convex portion 46 bites into the bottom surface 51a by pressing the circular top surface 51 with the bottom surface 31a of the circular top surface 31 according to the screwing amount of the water stop cap 30 ′. Therefore, the liquid leakage prevention performance can be improved and the liquid leakage of the liquid sealed in the water storage tank unit 2 can be reliably prevented. Therefore, compared with the case where the liquid leakage prevention performance is reinforced in a separate process, the convenience is high and the satisfaction of the user can be improved.

  Even if the ring packing 15 is not provided, the upper end opening portion of the cylindrical opening 40 ′ is water-stopped due to the close contact between the upper end portion 40c of the cylindrical opening 40 ′ and the bottom surface 31a of the circular upper surface 31 of the water-stop cap 30 ′. The structure sealed with cap 30 'may be sufficient, and the structure which improves the adhesiveness of the opening upper end part 40c and the bottom face 31a with the screwing amount of the water stop cap 30' with respect to cylindrical opening 40 'may be sufficient. .

(Fourth embodiment)
As shown in FIGS. 9 and 10, the high water-stop cap structure 1 </ b> C in the fourth embodiment includes a cylindrical opening 40 provided at the upper part of the water storage tank portion 2 and a water-stop cap 10 ′ screwed into the cylindrical opening 40. And an auxiliary water stop valve 60 mounted inside the cylindrical opening 40.

  In addition, FIG. 9 shows the explanatory view by the perspective view about 1 C of high water-stop cap structures of 1st embodiment, and FIG. 10 has shown the explanatory view by the longitudinal cross-sectional view about 1 C of high water-stop cap structures.

  Specifically, FIG. 9A shows a perspective view of the high water-stop cap structure 1C before the water-stop cap 10 ′ and the auxiliary water-stop valve 60 are attached to the cylindrical opening 40, and FIG. ) Shows a perspective view of the high water-stop cap structure 1C in which a part of the water stop cap 10 ′, the auxiliary water stop valve 60 and the cylindrical opening 40 in the same state is cut out at the center in the depth direction.

  10A shows a longitudinal sectional view of the high water-stop cap structure 1C in a state where the auxiliary water stop valve 60 is mounted on the cylindrical opening 40, and FIG. 10B shows the water stop cap 10 'screwed. The longitudinal cross-sectional view of 1 C of high water-stop cap structures of the state which showed is shown.

  The cylindrical opening 40 is formed integrally with the water tank 2 made of polycarbonate, and is a cylindrical opening that communicates the inside 2a and the outside of the water tank 2 with a spiral thread on the outer peripheral surface 40a. 41 is provided.

  The water stop cap 10 ′ is a cap that is screwed into the cylindrical opening 40 and seals the opening of the water storage tank portion 2, and includes a circular upper surface 11 that is circular in plan view and a bottom surface 11 a of the circular upper surface 11. A ring-shaped outer ring portion 12 ′ projecting downward along the outer peripheral edge and an inner ring portion 13 ′ disposed on the inner side at an appropriate interval from the outer ring portion 12 ′ are integrally configured. Yes.

On the inner peripheral surface 12a of the outer ring portion 12 ′ and the inner peripheral surface 13a of the inner ring portion 13 ′, spiral cap-side thread 14 (cap-side outer thread 14a ′, cap-side inner thread 14b ′, respectively). ).
In addition, since the cap side outer thread 14a ′ is engaged with the main body side thread 41, the main body side thread 41 and the cap side outer thread 14a ′ are formed at the same spiral angle.

  A ring-shaped ring packing 15 is provided between the upper end of the outer ring portion 12 ′ and the upper end of the inner ring portion 13 ′ along the bottom surface 11 a. The ring packing 15 is made of rubber having high elasticity, deformability, and water-stopping property.

  The auxiliary water stop valve 60 includes a cylindrical car body 61 that can be mounted along the outer peripheral surface 40a of the cylindrical opening 40, a movable valve 62 that is slidable in the vertical direction with respect to the car body 61, The movable valve 62 is composed of a spring 63 that urges the movable valve 62 downward.

  Specifically, the cage main body 61 includes, at its upper end, a locking flange portion 61a that is locked to the opening upper end portion 40c of the cylindrical opening 40, a cylindrical main body 61b, a locking flange portion 61a, and a cylindrical main body 61b. A column part 61c connected at a half point position and a support frame 61d disposed at a position facing the radial direction at the upper end of the cylindrical main body 61b and slidably supporting the movable valve 62 are configured.

The cylindrical main body 61b is mounted on the cylindrical opening 40 in such a manner that it projects downward across the lower opening 40d of the cylindrical opening 40 when the locking flange 61a is locked to the upper opening 40c. (See FIGS. 10A and 10B).
In addition, a loose fitting pin 61da that is inserted into a loose fitting hole 62ca formed in the overhanging portion 62c of the movable valve 62 is provided on the upper surface of the support frame 61d.

  The movable valve 62 protrudes radially outward near the boundary between the screw insertion shaft 62a and the water blocking umbrella portion 62b, the vertical screw insertion shaft 62a, the water blocking umbrella portion 62b disposed at the lower end of the screw insertion shaft 62a. The projecting portion 62c is configured.

As described above, the overhang portion 62c is formed with a loose fitting hole 62ca into which the loose fitting pin 61da of the support frame 61d is loosely fitted.
Further, a valve-side thread 62aa that is engaged with the cap-side inner thread 14b ′ of the water stop cap 10 ′ is formed on the screw insertion shaft 62a. The valve-side thread 62aa is formed at the same spiral angle as the cap-side inner thread 14b ′ so as to be engaged with the cap-side inner thread 14b ′.

  The spiral angle of the valve-side thread 62aa and the cap-side inner thread 14b 'is set to be steeper than the spiral angle of the body-side thread 41 and the cap-side outer thread 14a'. In this embodiment, the spiral angle of the valve-side thread 62aa and the cap-side inner thread 14b ′ is set to twice the spiral angle of the main-body-side thread 41 and the cap-side outer thread 14a ′. .

The waterstop umbrella portion 62b is formed in an umbrella shape widening at the end of the cross-sectional view, and has a larger diameter than the cage main body 61 so as to close the lower end opening 61ba of the cylindrical main body 61b at the upper surface portion. In addition, the water-stop umbrella part 62b is comprised with resin with high elasticity and water-stopping property.
The spring 63 is a spring having a smaller diameter than the water blocking umbrella portion 62b.

  The auxiliary water stop valve 60 configured by assembling the basket body 61, the movable valve 62, and the spring 63 is stopped with the lower end opening 61ba in a state where the movable valve 62 is urged downward with respect to the basket body 61 by the spring 63. A gap is formed between the upper surface of the water umbrella portion 62b and the upper surface of the water stop umbrella portion 62b is in close contact with the lower end opening 61ba by pulling the movable valve 62 upward in opposition to the urging force of the spring 63. .

  Further, in the auxiliary water stop valve 60, although the movable valve 62 is assembled to the cage body 61 so as to be slidable in the vertical direction, the loose fitting hole 62ca of the overhanging portion 62c and the loose fitting pin 61da of the support frame 61d. Therefore, the movable valve 62 is restricted from rotating with respect to the car body 61.

  As shown in FIG. 10A, the high water-stop cap structure 1 </ b> C configured in this way has an auxiliary water stop valve 60 inside the cylindrical opening 40 in such a manner that the locking flange portion 61 a is locked to the opening upper end portion 40 c. Wear. At that time, as described above, the cylindrical main body 61b is mounted in a state of straddling the lower end of the opening 40d and projecting downward from the lower end of the opening 40d to the inside 2a.

  In this state, since the movable valve 62 is in the lower position due to the urging force of the spring 63, there is a gap between the lower end opening 61ba and the upper surface of the water blocking umbrella portion 62b. The liquid 2a can be taken in and out of the cylindrical opening 40.

In this state, the water stop cap 10 ′ can be screwed so as to cover the cylindrical opening 40 from above (see FIG. 10B).
At this time, according to the screwing amount of the water stop cap 10 ′, the locking flange portion 61 a of the auxiliary water stop valve 60 inserted into the cylindrical opening 40 is brought into close contact with the bottom surface of the ring packing 15, so that the ring packing 15 The upper opening portion of the cylindrical opening 40 is deformed and sealed by the ring packing 15 and the water stop cap 10 ′.

  Further, by locking the cap-side outer thread 14a ′ of the water-stop cap 10 ′ and the main-body-side thread 41 of the cylindrical opening 40 and screwing the water-stop cap 10 ′ to the cylindrical opening 40, The cap-side inner thread 14b ′ of the inner ring portion 13 ′ and the valve-side thread 62aa of the screw insertion shaft 62a are locked in accordance with the screwing of the water-stop cap 10 ′, so that the movable valve 62 is stopped. The inner ring portion 13 ′ and the screw insertion shaft 62a are screwed together so as to be pulled toward 10 ′.

  At this time, the spiral angle of the valve-side thread 62aa and the cap-side inner thread 14b ′ is set to be steeper than the spiral angle of the main-body-side thread 41 and the cap-side outer thread 14a ′. The movable valve 62 is drawn closer to the water stop cap 10 ′ than the screw amount of the water stop cap 10 ′ into the opening 40.

  Therefore, the movable valve 62 moves upward against the urging force of the spring 63 by screwing the inner ring portion 13 ′ and the screw insertion shaft 62a, and the upper surface of the water blocking umbrella portion 62b is in close contact with the lower end opening 61ba. There is no gap between the lower end opening 61ba and the upper surface of the water blocking umbrella 62b, and the liquid inside the inner 2a cannot be taken in and out through the cylindrical opening 40.

  As described above, the high water-stop cap structure 1C has the sealing of the upper end opening portion of the cylindrical opening 40 by screwing the water-stop cap 10 'and the cylindrical opening 40, and downward so as to straddle the cylindrical opening 40d. The upper and lower ends of the opening are double prevented from leaking by sealing the lower end opening 61ba of the cylindrical main body 61b of the auxiliary water stop valve 60 attached to the protruding cylindrical opening 40 with the water stop umbrella portion 62b. .

  Accordingly, the water leakage prevention performance by sealing the upper end opening portion of the cylindrical opening 40 by screwing the water stop cap 10 ′ and the cylindrical opening 40, and the water stop umbrella portion 62 b at the lower end opening 61 ba of the cylindrical main body 61 b. It is improved by sealing, and the liquid leakage of the liquid sealed in the water storage tank unit 2 can be reliably prevented.

  In other words, the screwing between the water stop cap 10 'and the cylindrical opening 40 functions as a liquid leakage preventing means, and the water blocking umbrella portion 62b seals the lower end opening 61ba of the cylindrical main body 61b. Since it functions as a means, liquid leakage of the liquid sealed in the water storage tank unit 2 can be reliably prevented.

  Further, the screwing between the water stop cap 10 ′ and the cylindrical opening 40 functions as a liquid leakage prevention means, and the water leakage umbrella reinforcing part 62b seals the lower end opening 61ba of the cylindrical body 61b. Compared with the case where the liquid leakage prevention performance is reinforced in a separate process, the convenience is improved and the satisfaction of the user is improved. can do.

  Even if the ring packing 15 is not provided, due to the close contact between the locking flange portion 61a of the auxiliary water stop valve 60 inserted into the cylindrical opening 40 and the bottom surface 11a of the circular upper surface 11 of the water stop cap 10 ', the cylindrical opening The top opening portion of 40 may be sealed with the water stop cap 10 ′, and the adhesion between the locking flange portion 61 a and the bottom surface 11 a can be determined by the screwing amount of the water stop cap 10 ′ into the cylindrical opening 40. The structure to improve may be sufficient.

  In the above description, the high water-stop cap structure 1C in which the auxiliary water stop valve 60 is mounted on the cylindrical opening 40 protruding upward from the water storage tank portion 2 has been described. As shown in FIG. An opening 3 is formed in the water storage tank section 2 such as a hot water bottle, and a threaded auxiliary water stop valve 60 ′ is attached to the opening 3, and the water stop cap 10 ″ is attached to the threaded auxiliary water stop valve 60 ′. May be configured to be screwed.

  Specifically, the threaded auxiliary water stop valve 60 ′ is formed in a vertical direction with respect to the cylindrical threaded car body 61 ′ and the threaded car body 61 ′ in the same manner as the auxiliary water stop valve 60 described above. The movable valve 62 is slidably mounted and a spring 63 that biases the movable valve 62 downward. The movable valve 62 and the spring 63 have the same configuration as the auxiliary water stop valve 60 described above.

  The threaded basket main body 61 ′ includes a cylindrical main body 61 b ′ having a main body side thread 61 bb on the inner peripheral surface 61 ba and a locking flange portion 61 a that is locked to the opening 3. The other configuration of the threaded car body 61 ′ is the same as that of the car body 61 of the auxiliary water stop valve 60 described above.

The water stop cap 10 ″ is a cap for sealing the opening of the water storage tank portion 2 by screwing onto the threaded auxiliary water stop valve 60 ′ locked to the opening 3. The circular upper surface 11 of the cap 10 ′ and the intermediate ring portion 16 are integrally configured.
A ring packing 15 is provided on the bottom surface 11 a of the circular upper surface 11 on the outer diameter side of the intermediate ring portion 16.

  The outer peripheral surface 16a and the inner peripheral surface 16b of the intermediate ring portion 16 are each provided with a helical cap-side thread 14 '' (cap-side outer thread 14a '', cap-side inner thread 14b ''). ing.

  It should be noted that the cap-side outer thread 14a ″ is the inner periphery of the threaded basket body 61 ′ attached to the opening 3 when the water stop cap 10 ″ and the threaded auxiliary water stop valve 60 ′ are screwed together. The cap 61 is engaged with the main body side thread 61bb formed on the surface 61ba, and the cap side outer thread 14a '' and the main body side thread 61bb are formed at the same spiral angle.

  In addition, the cap-side inner thread 14b ″ and the valve-side thread 62aa of the screw insertion shaft 62a are engaged with each other, and thus are formed at the same spiral angle. The spiral angle of the valve-side thread 62aa and the cap-side inner thread 14b '' is set to be a steeper angle than the spiral angle of the cap-side outer thread 14a '' and the body-side thread 61bb. In this embodiment, the spiral angle of the cap-side inner thread 14b ″ and the valve-side thread 62aa is set to be twice the spiral angle of the cap-side outer thread 14a ″ and the main-body-side thread 61bb. ing.

  With such a configuration, the high water-stop cap structure 1C using the water-stop cap 10 ″ and the threaded auxiliary water stop valve 60 ′ has the water stop cap 10 ″ and the threaded auxiliary water-stop valve 60 ′. Sealing of the upper end opening portion of the threaded auxiliary water stop valve 60 ′ by screwing to the lower end opening 61ba of the cylindrical main body 61b of the threaded auxiliary water stop valve 60 ′ protruding downward from the opening 3. The upper and lower end portions of the opening 3 due to sealing by the water umbrella portion 62b are doubled to prevent liquid leakage.

  Specifically, the spiral angles of the valve-side thread 62aa and the cap-side inner thread 14b '' are set to be steeper than the spiral angles of the body-side thread 41 and the cap-side outer thread 14a ''. Therefore, the movable valve 62 is drawn closer to the water stop cap 10 ′ than the screw amount of the water stop cap 10 ″ into the threaded auxiliary water stop valve 60 ′.

  Therefore, the liquid leakage prevention performance by sealing the upper end opening portion of the threaded auxiliary water stop valve 60 ′ by screwing the water stop cap 10 ″ and the threaded auxiliary water stop valve 60 ′ is improved. The lower end opening 61ba is sealed by the waterproof umbrella portion 62b, so that leakage of the liquid sealed in the water storage tank portion 2 can be reliably prevented.

  In other words, screwing between the water stop cap 10 '' and the threaded auxiliary water stop valve 60 'functions as a liquid leakage preventing means, and the water stop umbrella portion 62b seals the lower end opening 61ba of the cylindrical main body 61b. Since this functions as a liquid leakage prevention reinforcing means, liquid leakage of the liquid sealed in the water storage tank portion 2 can be reliably prevented.

  Further, the screwing of the water stop cap 10 ″ and the threaded auxiliary water stop valve 60 ′ functions as a liquid leakage preventing means, and the water stop umbrella portion 62b seals the lower end opening 61ba of the cylindrical main body 61b. Functions as a means for preventing leakage of liquid and can reliably prevent the leakage of the liquid enclosed in the water storage tank part 2, which is more convenient than the case of reinforcing the leakage prevention performance in a separate process. Is high and can improve user satisfaction.

  Even if the ring packing 15 is not provided, due to the close contact between the locking flange portion 61a of the threaded auxiliary water stop valve 60 ′ inserted into the opening 3 and the bottom surface 11a of the circular upper surface 11 of the water stop cap 10 ″. The upper end opening portion of the opening 3 may be sealed with a water stop cap 10 ″, and the water stop cap for the auxiliary water stop valve 60 ′ with a thread is provided for the adhesion between the locking flange portion 61a and the bottom surface 11a. The configuration may be improved with a 10 ″ screwing amount.

(Fifth embodiment)
As shown in FIG. 12, the high water-stop cap structure 1 </ b> D according to the fifth embodiment includes a cylindrical opening 40 provided in the upper part of the water storage tank portion 2 and a water-stop cap 70 screwed into the cylindrical opening 40. is doing.
In addition, FIG. 12 has shown explanatory drawing by the longitudinal cross-section about high water-stop cap structure 1D.

  The cylindrical opening 40 is formed integrally with the water tank 2 made of polycarbonate, and is a cylindrical opening that communicates the inside 2a and the outside of the water tank 2 with a spiral thread on the outer peripheral surface 40a. 41 is provided.

A packing guide portion 47 is provided in the interior 2 a below the cylindrical opening 40.
As shown in FIG. 12 (c), which is an arrow view taken along the line AA of FIG. 12 (b), the packing guide portion 47 has a cylindrical shape in the vicinity of the opening lower end 40d of the interior 2a of the water tank portion 2. The shaped openings 40 are arranged so as to be equally distributed in a plan view.

  The packing guide portion 47 is formed in a protruding shape toward the opening lower end 40d so that a slight gap is formed between the packing guide portion 47 and the opening lower end 40d. The packing guide portion 47 is supported from the inner surface of the water storage tank portion 2 by a holding bracket 48.

  The water stop cap 70 is a cap that is screwed into the cylindrical opening 40 to seal the upper end opening portion of the water storage tank portion 2, and has a circular upper surface 71 that is circular in plan view and a bottom surface 71 a of the circular upper surface 71. A ring-shaped outer ring portion 72 projecting downward along the outer peripheral edge is integrally formed.

A cap-side thread 72 b is provided on the inner peripheral surface 72 a of the outer ring portion 72.
In addition, since the cap side thread 72b is locked with the above-described main body side thread 41, the main body side thread 41 and the cap side thread 72b are formed at the same spiral angle.

  The water stop cap 70 includes a cylindrical packing 73 that is integrally fitted to the bottom surface 71 a of the circular upper surface 71. The cylindrical packing 73 is formed of an elastic body such as rubber or silicon, and is formed in a cylindrical shape having a diameter that can be inserted into the cylindrical opening 40 when the water blocking cap 70 is attached.

The cylindrical packing 73 is formed by an upper end water stop portion 74 provided at a cylindrical upper end portion and a lower end water stop portion 75 provided at a cylindrical lower end portion.
Similarly to the ring packing 15 described above, the upper end water stop 74 is made of rubber having high resilience, deformability, and water stop, and is formed to project from the upper end of the cylindrical packing 73 in a bowl shape. The upper end 40c of the opening is in close contact with the bottom surface and deforms to seal the upper end opening of the cylindrical opening 40.
The lower end water stop part 75 is formed in a sucker shape at a cylindrical lower end part. In other words, the outer peripheral portion at the lower end is formed in a divergent shape.

  As shown in FIG. 12, the high water-stop cap structure 1 </ b> D configured as described above locks the water stop cap 70 with respect to the cylindrical opening 40 by locking the upper end water stop 74 and the main body side thread 41. Can be screwed.

  At this time, the upper end 40c of the cylindrical opening 40 is brought into close contact with the bottom surface of the upper water stop 74 according to the screwing amount of the water stop cap 70, and the upper water stop 74 is deformed to form the cylindrical opening 40. The upper end opening portion of the upper end is sealed by the upper end water stop portion 74 and the water stop cap 70. That is, the cylindrical opening 40 can be sealed by the upper water stop portion 74 and the water stop cap 70 functioning as liquid leakage preventing means.

  Further, by screwing the water stop cap 70 and the cylindrical opening 40, as shown in FIG. 12 (b), the cylindrical packing 73 is inserted into the cylindrical opening 40 together with the lower end water stop part 75, and the lower end water stop part. 75 abuts on the packing guide portion 47. Thereby, the lower end water stop part 75 contacts the opening lower end 40d of the cylindrical opening 40 due to the wedge effect that the lower end water stop part 75 is pushed and spread outward in the radial direction by the reaction force received from the packing guide part 47.

Thereby, when the water stop cap 70 is screwed into the cylindrical opening 40, the lower opening 40 d of the cylindrical opening 40 can be sealed with the lower water stop 75.
Therefore, the liquid leakage prevention performance of the high water-stop cap structure 1D can be improved, and the liquid leakage of the liquid sealed in the water storage tank unit 2 can be reliably prevented.

  Specifically, the high water-stop cap structure 1 </ b> D prevents liquid leakage due to close contact between the upper end 40 c of the cylindrical opening 40 and the bottom surface of the upper water stop 74 due to the screwing strength between the water stop cap 70 and the cylindrical opening 40. By the double liquid leakage prevention effect of the effect and the liquid leakage prevention effect by sealing the opening lower end 40d by the upper end water stop portion 74 widened by the packing guide portion 47 in accordance with the screwing of the water stop cap 70 The liquid leakage preventing functions can be mutually reinforced and the liquid sealed in the water storage tank portion 2 can be reliably prevented from leaking.

  Moreover, the double liquid leakage of the liquid leakage prevention effect by contact | adherence with the opening upper end part 40c and the bottom face of the upper end water stop part 74 and the liquid leak prevention effect by sealing the opening lower end 40d by the upper end water stop part 74 is demonstrated. Because of the prevention effect, it is possible to mutually reinforce the liquid leakage prevention function and prevent liquid leakage of the liquid enclosed in the water storage tank part 2 reliably. Compared with the case where the liquid leakage prevention performance is reinforced in a separate process As a result, convenience is high and user satisfaction can be improved.

  In addition, even if the cylindrical packing 73 is not provided with the upper end water stop portion 74, the upper end of the cylindrical opening 40 is maintained due to the adhesion between the bottom surface 71 a of the circular upper surface 71 of the water stop cap 70 and the upper end portion 40 c of the cylindrical opening 40. The opening portion may be configured to be sealed with the water stop cap 70, and the adhesion between the bottom surface 71a and the upper end portion 40c of the opening is improved by the screwing amount of the water stop cap 70 into the cylindrical opening 40. Also good.

(Sixth embodiment)
As shown in FIGS. 13 and 14, the high water-stop cap structure 1 </ b> E in the sixth embodiment includes an inverted truncated cone opening 90 provided at the upper part of the water storage tank portion 2 and an insertion plug to be inserted into the inverted truncated cone opening 90. 80 and an auxiliary band 93 that assists the tightening of the inverted truncated cone opening 90.

  In addition, FIG. 13 shows the explanatory view by the perspective view about the high water-stop cap structure 1E of 1st embodiment, and FIG. 14 has shown the explanatory view by the longitudinal cross-sectional view about the high water-stop cap structure 1E.

  Specifically, FIG. 13A shows a perspective view of the high water-stop cap structure 1E before the insertion plug 80 is attached to the inverted frustoconical opening 90, and FIG. 13B shows the insertion in the same state. The perspective view of the high water-stop cap structure 1E which notched a part of the stopper 80, the auxiliary | assistant band 93, and the cylindrical opening 90 in the depth direction center is shown.

  14A shows a longitudinal sectional view of the high water-stop cap structure 1E in a state before the insertion plug 80 is inserted into the inverted frustoconical opening 90, and FIG. The longitudinal cross-sectional view of the high water-stop cap structure 1E in the state where the insertion plug 80 is inserted and the auxiliary band 93 assists in tightening is shown.

  The inverted frustoconical opening 90 is an opening having an inverted frustoconical shape when viewed from the front, which is integrally formed with the water tank 2 made of polycarbonate and communicates the inside 2a and the outside of the water tank 2 with a circumferential surface 90a. And a notch 91 on an inverted triangle is provided at two opposing positions.

  The notch 91 is a notch formed in an inverted isosceles triangle shape having a depth of about 2/3 of the height of the inverted truncated cone opening 90 by a hypotenuse according to the inclination angle of the inverted truncated cone opening 90. Two locations are provided at the center symmetrical positions on the circumference. Note that the inverted truncated cone opening 90 formed integrally with the water storage tank portion 2 is configured to be deformable inward by a notch 91.

  The locking groove 92 is formed along the outer peripheral surface 90 a of the inverted frustoconical opening 90 and has a substantially semicircular cross section that allows the auxiliary band 93 to be described later to be locked. 3 are provided at approximately equal intervals.

  The auxiliary band 93 is formed in a ring shape with a high elasticity in plan view. In addition, the auxiliary | assistant band 93 is formed in the diameter smaller than the lower end part with the smallest diameter in the inverted truncated cone opening 90 formed in the inverted truncated cone shape. Further, the elasticity of the auxiliary band 93 is set to be stronger than that of the inverted truncated cone opening 90 provided with the notch 91.

  The insertion plug 80 is a sealing plug that is inserted into the inverted truncated cone opening 90 to seal the opening of the water storage tank portion 2, and has a cylindrical shape slightly smaller than the diameter of the inverted truncated cone opening 90. It is made of rubber with high elasticity, deformability and water-stopping property.

  As shown in FIG. 14, the high water-stop cap structure 1 </ b> E configured in this way inserts the insertion plug 80 from above the inverted truncated cone opening 90. By inserting the insertion plug 80, the insertion plug 80 is deformed along the inner peripheral surface 90 b of the inverted truncated cone opening 90, and the inverted truncated cone opening 90 is sealed by the insertion plug 80.

  In this state, the auxiliary band 93 is locked in the locking groove 92. Due to the locking of the auxiliary band 93 to the locking groove 92, the inverted frustoconical opening 90 is deformed in the direction in which the notch 91 is closed due to the elasticity of the auxiliary band 93, and the adhesion with the outer peripheral surface of the insertion plug 80. Will be improved. That is, locking the auxiliary band 93 in the locking groove 92 and improving the adhesion to the outer peripheral surface of the insertion plug 80 functions as a liquid leakage prevention reinforcing means.

  As described above, the high water-stop cap structure 1E is configured to prevent liquid leakage based on the improvement in the adhesion between the inverted truncated cone opening 90 and the insertion plug 80 according to the deformation of the inverted truncated cone opening 90 by the auxiliary band 93. As a result of the insertion of the insertion plug 80 functioning as a reverse frustoconical opening 90, the reverse frustoconical opening 90 is sealed to improve the liquid leakage prevention performance, and the liquid leaked in the water storage tank 2 is reliably leaked. Can be prevented.

  In addition, the liquid leakage prevention performance due to the sealing of the inverted truncated cone opening 90 by the insertion of the insertion plug 80 functioning as the liquid leakage preventing means into the inverted truncated cone opening 90 in this way is shown in FIG. In the case where the liquid leakage prevention performance is reinforced in a separate process, the liquid leakage of the liquid enclosed in the water storage tank portion 2 can be reliably prevented. Compared with this, convenience is high and user satisfaction can be improved.

(Seventh embodiment)
As shown in FIGS. 15 and 16, the high water-stop cap structure 1 </ b> F according to the seventh embodiment includes a cylindrical opening 40 provided at an upper portion of the water storage tank portion 2 and a water-stop cap 30 screwed into the cylindrical opening 40. It consists of and.

  15A shows a perspective view of the water stop cap 30 and the cylindrical opening 40, and FIG. 15B shows a part of the water stop cap 30, the cylindrical opening 40 and the water storage tank portion 2 in the center in the depth direction. Explanatory drawing by the perspective view of the high water-stop cap structure 1F notched in FIG. 16A shows a perspective view of the high water-stop cap structure 1F in a screwed state, and FIG. 16B shows a longitudinal sectional view of the high water-stop cap structure 1F.

  Further, FIG. 16C shows an enlarged view of the portion a in FIG. 16B, and FIG. 16D shows the fitting of the flange portion 35 when the water stop cap 30 and the cylindrical opening 40 are screwed together. The enlarged view explaining the convex part 36 and the circular groove | channel 43 of the flat ring part 42 is shown.

  The high water-stop cap structure 1 </ b> F includes a circular fitting mechanism 4 (FIG. 16) concentric with the cylindrical opening 40 that fits in the screwing direction S. The circular fitting mechanism 4 includes a fitting convex portion 36 disposed on the outer diameter side of the cylindrical opening 40 and a circular groove 43 disposed at a corresponding position in the water stop cap 30.

  The water stop cap 30 is a cap that is screwed into the cylindrical opening 40 and seals the opening of the water storage tank portion 2. The water stop cap 30 is external to the circular upper surface 31 that is circular in plan view and the bottom surface 31 a of the circular upper surface 31. A ring-shaped ring portion 32 projecting downward along the peripheral edge and a flange portion 35 projecting radially outward near the lower end of the ring portion 32 are configured.

  The inner circumferential surface 32a of the ring portion 32 is provided with a spiral cap-side screw thread 34 that engages with the main-body screw thread 41, and the main-body screw thread 41 and the cap-side screw thread 34 have the same spiral angle. It is formed with.

  A ring-shaped ring packing 15 is provided at the upper end of the inner peripheral surface 32a of the ring portion 32 so as to extend along the bottom surface 31a. The ring packing 15 is made of rubber having high elasticity, deformability, and water-stopping property.

  Further, the bottom surface 35a of the flange portion 35 is provided with two fitting convex portions 36 that are concentric with the ring portion 32 and project downward from the bottom surface 35a. In addition, the two fitting convex parts 36 are arrange | positioned at predetermined intervals in radial direction, and each fitting convex part 36 of FIG.16 (b) which shows sectional drawing of the high water-stop cap structure 1F. As shown in the enlarged view of part a (FIG. 16C), a downwardly protruding isosceles trapezoidal cross section is formed.

  The cylindrical opening 40 is formed integrally with the water tank 2 made of polycarbonate, and is a cylindrical opening that communicates the inside 2a and the outside of the water tank 2 with a spiral thread on the outer peripheral surface 40a. 41 is provided.

In addition, a flat ring portion 42 having a horizontal upper surface 42a having a diameter larger than that of the cylindrical opening 40 is formed at the lower end portion of the cylindrical opening 40, which is a connecting portion between the cylindrical opening 40 and the water storage tank portion 2. ing.
The flat ring part 42 is provided with an isosceles trapezoidal circular groove 43 corresponding to the fitting convex part 36 at a predetermined interval on the horizontal upper surface 42a of the flange part 35 corresponding to the fitting convex part 36. Two are provided apart.

  As shown in FIG. 16, the high water-stop cap structure 1 </ b> F configured as described above locks the cap-side thread 34 and the main-body-side thread 41 to attach the water-stop cap 30 to the cylindrical opening 40. Can be screwed.

  At this time, the opening upper end portion 40c of the cylindrical opening 40 is brought into close contact with the bottom surface of the ring packing 15 according to the screwing amount of the water stop cap 30, and the ring packing 15 is deformed, so that the upper end opening portion of the cylindrical opening 40 is deformed. Is sealed by the ring packing 15 and the water stop cap 30.

  Further, by screwing the water stop cap 30 and the cylindrical opening 40, as shown in FIG. 16 (d), a circular circular groove 43 disposed on the outer diameter side of the cylindrical opening 40 is provided on the outer diameter side of the ring portion 32. Is inserted in the direction of the arrow S, and the fitting projection 36 and the circular groove 43 are fitted. Thus, by the circular fitting mechanism 4 formed by fitting the fitting convex portion 36 and the circular groove 43, the liquid leakage prevention performance of the high water-stop cap structure 1F is improved and sealed in the water storage tank portion 2. Liquid leakage can be reliably prevented.

  Specifically, the high water-stop cap structure 1 </ b> F is effective in preventing liquid leakage due to the close contact between the upper end portion 40 c of the cylindrical opening 40 and the bottom surface of the ring packing 15 due to the screwing strength between the water-stop cap 30 and the cylindrical opening 40. In addition, if the water stop cap 30 is screwed into the cylindrical opening 40 or the liquid that has entered from the water storage tank portion 2 between the cylindrical opening 40 and the inner peripheral surface 32 a of the ring portion 32. Even in the case where liquid is present inside, the fitting protrusion 36 and the circular groove 43 which are concentric with the ring portion 32 and the cylindrical opening 40 and are arranged on the outer side of the diameter are fitted. Therefore, it is possible to prevent the liquid from leaking outside by the fitting convex portion 36 and the circular groove 43 into which the liquid is fitted.

  As described above, the high water-stop cap structure 1 </ b> F has the effect of preventing liquid leakage due to the close contact between the upper end portion 40 c of the cylindrical opening 40 and the bottom surface of the ring packing 15 due to the screwing strength between the water-stop cap 30 and the cylindrical opening 40. The liquid leakage prevention function is mutually reinforced by the double liquid leakage prevention effect of the liquid leakage prevention effect due to the fitting between the fitting convex portion 36 and the circular groove 43 and enclosed in the water storage tank portion 2. Liquid leakage can be reliably prevented.

  In addition, in the high water-stop cap structure 1F, the two fitting projections 36 having the isosceles trapezoidal cross section and the two circular grooves 43 having the isosceles trapezoidal cross section are fitted. The number of the fitting convex part 36 and the circular groove | channel 43 should just correspond, and you may comprise by one or two or more fitting convex part 36 and the circular groove | channel 43. FIG.

  In addition, for example, a pair of non-parallel pairs of opposite sides having the same inclination angle have the same leg-shaped fitting convex part 36 and the circular groove 43, but the trapezoidal sectional fitting convex part 36 and the circular shape having the same inclination angle are not used. A groove 43 may be used.

  Further, one of the fitting convex part 36 and the circular groove 43 having a rectangular cross section or a square cross section, or one of the fitting convex part 36 and the circular groove 43 is formed with a rectangular cross section, and the other is formed with a trapezoidal cross sectional shape that can be fitted. May be.

Furthermore, the fitting portion 36 that protrudes downward from the bottom surface 35a is provided in the flange portion 35, and the circular groove 43 that is formed in a concave shape from the horizontal upper surface 42a is provided in the flat ring portion 42, but the upward direction from the horizontal upper surface 42a. It is possible to provide a fitting convex portion projecting on the bottom surface 35a and form a concave circular concave portion on the bottom surface 35a of the flange portion 35 to be fitted.
In order to improve the water shielding performance of the circular fitting mechanism 4 constituted by the fitting convex portion 36 and the circular groove 43, a packing that can be elastically deformed may be provided inside the circular groove 43.

  Furthermore, as shown in FIGS. 17 and 18, an M-shaped circular fitting mechanism 5 concentric with the cylindrical opening 40 that fits in the screwing direction S may be provided. The M-shaped cross-section circular fitting mechanism 5 includes an M-shaped cross-section fitting portion 37 disposed outside the diameter of the cylindrical opening 40 and an M-shaped cross-section fitted portion 44 disposed at a corresponding position in the water stop cap 30. ing.

  17A shows a perspective view of the water stop cap 30 and the cylindrical opening 40, and FIG. 17B shows a part of the water stop cap 30, the cylindrical opening 40 and the water storage tank portion 2 in the center in the depth direction. Explanatory drawing by the perspective view of high water-stop cap structure 1F 'notched in FIG. 18A shows a perspective view of the high water-stop cap structure 1F 'in a screwed state, and FIG. 18B shows a longitudinal sectional view of the high water-stop cap structure 1F'.

  18C shows an enlarged view of the portion a in FIG. 18B, and FIG. 18D shows the M-shape of the flange portion 35 when the water stop cap 30 and the cylindrical opening 40 are screwed together. The enlarged view explaining the cross-section fitting part 37 and the M-shaped cross-section fitting part 44 of the flat ring part 42 is shown.

  The M-shaped cross-section fitting portion 37 formed on the flange portion 35 in the high water-stop cap structure 1F ′ is formed between a two-groove recess portion 37a having a circular shape when viewed from the bottom and recessed from the bottom surface 35a, and the two two-groove recess portions 37a. The intermediate convex portion 37b protrudes downward from the bottom surface 35a.

  Corresponding to the M-shaped cross-section fitting portion 37, the M-shaped cross-section fitted portion 44 formed on the flat ring portion 42 has a two-convex convex portion 44 a having a circular shape in plan view protruding upward from the horizontal upper surface 42 a and 2 Between the two ridges 44a of the book, an intermediate recess 44b that is recessed downward from the horizontal upper surface 42a is formed.

  Thereby, like the above-mentioned high water-stop cap structure 1F, the high water-stop cap structure 1F ′ has a cylindrical shape as shown in FIG. 18 (d) by screwing the water-stop cap 30 and the cylindrical opening 40. A circular M-shaped cross-section fitting portion 37 disposed on the outer diameter side of the ring portion 32 is inserted in the circular M-shaped cross-section fitted portion 44 disposed on the outer diameter side of the opening 40 in the arrow S direction. The cross section fitting portion 37 and the M-shaped cross section fitted portion 44 are fitted. In this way, the M-shaped cross-section fitting portion 37 and the M-shaped cross-section fitted portion 44 are fitted to each other so that the liquid leakage prevention performance of the highly water-resistant cap structure 1F ′ is achieved by the M-shaped cross-section circular fitting mechanism 5. And leakage of the liquid sealed in the water storage tank unit 2 can be reliably prevented.

  Specifically, a two-groove concave portion 37a having a circular shape viewed from the bottom surface that is recessed upward from the bottom surface 35a and a two-convex convex portion 44a having a circular shape when viewed from above that protrudes upward from the horizontal upper surface 42a are fitted. Since the intermediate concave portion 44b that is recessed downward from the horizontal upper surface 42a and the intermediate convex portion 37b that protrudes downward from the bottom surface 35a are fitted, the liquid leakage prevention effect at the flange portion 35 and the flat ring portion 42 is further improved. be able to.

  Even if the ring packing 15 is not provided, the upper end opening portion of the cylindrical opening 40 is covered with the water stop cap 30 due to the adhesion between the upper end portion 40c of the cylindrical opening 40 and the bottom surface 31a of the circular upper surface 31 of the water stop cap 30. The structure which seals may be sufficient and the structure which improves the adhesiveness of the opening upper end part 40c and the bottom face 11a with the screwing amount of the water stop cap 30 with respect to the cylindrical opening 40 may be sufficient.

  Further, the improvement of the liquid leakage prevention effect by the M-shaped cross-section circular fitting mechanism 5 is not limited to the water-stop cap 30 and the cylindrical opening 40 in the high water-stop cap structure 1F, but the high water-stop cap structure 1, 1A, 1B. , 1C, 1D, 1E may be provided.

  For example, as shown in FIGS. 19 and 20, the high water-stop cap structure 1 may be provided with a circular fitting mechanism 4 and an M-shaped circular fitting mechanism 5. FIG. 19 is an explanatory view of a high water-stopping cap structure 1 ′ provided with a circular fitting mechanism 4 in the high water-stopping cap structure 1, and FIG. An explanatory view of a highly water-resistant cap structure 1 ″ provided with a mechanism 5 is shown.

  FIG. 19A is a perspective view of the high water-stop cap structure 1 ′ in which a part of the water stop cap 10, the cylindrical opening 20 and the water storage tank portion 2 is cut out at the center in the depth direction. 19 (b) shows a longitudinal sectional view of the high water-stop cap structure 1 ′.

  FIG. 20 (a) is a perspective view of a high water-stop cap structure 1 ″ in which a part of the water stop cap 10, the cylindrical opening 20 and the water storage tank part 2 is cut out at the center in the depth direction. FIG. 20B shows a longitudinal sectional view of the high water-stop cap structure 1 ″.

  As described above, the high water-stop cap structures 1 ′ and 1 ″ include the fitting convex portion 36 and the circular groove 43 in the circular fitting mechanism 4, and the M-shaped cross-sectional fitting portion 37 in the M-shaped circular fitting mechanism 5. And the M-shaped cross-section fitted portion 44 are fitted to improve the liquid leakage prevention performance of the high water-stop cap structure 1 described above, and reliably prevent the liquid sealed in the water storage tank portion 2 from leaking. be able to.

Next, the screwing jig 100 using the screwing structure in which the water blocking cap 10 and the cylindrical opening 20 are screwed in the high water blocking cap structure 1 will be described with reference to FIGS.
FIG. 21 is an explanatory view of the high-strength screw structure 100, FIG. 22 is an explanatory view of the conventional screw structure 200, and FIG. 23 is a diagram of the high-strength screw structure 100 and the conventional screw structure 200. The explanatory view by sectional drawing which compares is shown.

  21A shows a perspective view of the screwing jig 100 before screwing, and FIG. 21B shows the screwing jig 100 in which the screwing jig 100 in the same state is cut out at the center in the depth direction. The explanatory view by a perspective view is shown.

  Similarly, FIG. 22A shows a perspective view of the conventional screwing jig 200 before screwing, and FIG. 22B shows the screwing in which the screwing jig 200 in the same state is cut out at the center in the depth direction. The explanatory view by the perspective view of jig 200 is shown.

  Further, FIG. 23A shows a cross-sectional view at the center in the depth direction of the screwing jig 100 in the screwed state, and FIG. 23B shows a cross-sectional view at the center in the depth direction of the screwing jig 200 in the screwed state. Show.

The screwing jig 100 has a structure in which a female jig 110 and a male jig 120 are screwed together.
The male-side jig 120 has a ring-shaped screwing portion 121 having a male-side outer peripheral surface 121b and a cylindrical male-side inner peripheral surface 121a that are smaller in diameter than the female-side inner peripheral surface 111a of the female-side jig 110. And a main body portion 122 having a larger diameter than the screw insertion portion 121.

The male outer peripheral surface 121b of the screw insertion portion 121 of the male jig 120 is provided with a spiral second outer peripheral screw portion 123 protruding outward in the radial direction.
In addition, the male inner peripheral surface 121a of the screw insertion portion 121 in the male jig 120 is provided with a spiral second inner peripheral screw portion 124 that protrudes inward in the radial direction.

The female jig 110 includes a screwing allowance part 111 that allows the screwing part 121 to be screwed in, and a main body part 113.
The screwing-permitted portion 111 has a cylindrical female-side inner peripheral surface 111a, and a female side having a smaller diameter than the male-side inner peripheral surface 121a of the male-side jig 120 inside the female-side inner peripheral surface 111a. A cylindrical first inner cylindrical portion 112 having an outer peripheral surface 112b is provided.

  Then, on the female side inner peripheral surface 111a of the screwing allowable portion 111 in the female side jig 110, a spiral first outer screw portion 114 that is engaged with the second outer peripheral screw portion 123 and protrudes radially inward is provided. I have.

  Further, the female side outer peripheral surface 112b of the first inner cylindrical portion 112 is provided with a spiral first inner screw portion 115 that is engaged with the second inner peripheral screw portion 124 and protrudes radially outward.

In addition, the 1st outer side thread part 114, the 1st inner side thread part 115, the 2nd outer peripheral side thread part 123, and the 2nd inner peripheral side thread part 124 are formed with the same spiral angle and the same number of threads.
Further, the main body 122 of the male jig 120 and the main body 113 of the female jig 110 are simply shown in a cylindrical shape in FIGS. 21 and 23. The articles to be screwed together are formed integrally.

  The screwing jig 200 configured in this manner locks the first outer threaded portion 114 and the second outer peripheral threaded portion 123, and the first inner threaded portion 115 and the second inner peripheral threaded portion 124. Accordingly, the female side jig 110 and the male side jig 120 can be screwed together by screwing the screw insertion part 121 into the screwing allowance part 111.

  As a result, the first outer threaded portion 114 and the second outer peripheral threaded portion 123, and the two sets of threaded portions of the first inner threaded portion 115 and the second inner peripheral threaded portion 124 are locked together. Compared with the conventional screwing jig 200 in which the outer peripheral side screw part 223 and the first outer screw part 214 are engaged and screwed together, the pulling force in the direction in which the female side jig 210 and the male side jig 220 are pulled out. It is possible to improve the screwing strength facing the.

  Specifically, as shown in FIG. 22, in the conventional screwing jig 200 in which the screwing allowable part 211 in the female jig 210 and the screwing part 221 in the male jig 220 are screwed, The inner peripheral side screw portion 214 formed on the inner peripheral surface 211a of 211 and the outer peripheral side screw portion 223 formed on the outer peripheral surface 221b of the screw insertion portion 221 are locked and screwed together.

In addition, the screwing strength opposite to the tensile force in the screwing jig depends on the locking length of the screw part. Therefore, the screwing jig 100 in which two sets of screw portions of the first outer screw portion 114 and the second outer peripheral screw portion 123, and the first inner screw portion 115 and the second inner screw portion 124 are engaged with each other. In order to obtain a screwing strength equivalent to the screwing strength of the screw, as shown in FIG. 23, at least double the helical length of the inner screw portion 214 and the outer screw portion 223 in the screw jig 200. Need to be formed. Along with this, the number of threads of the inner peripheral side screw part 214 and the outer peripheral side thread part 223 also doubles, and the female side jig 210 and the male side jig 220 become longer in the screwing direction.
And the amount of screwing in which the female side jig | tool 210 and the male side jig | tool 220 are relatively rotated in a spiral direction and screwed in is also doubled.

Considering this in reverse, compared with the conventional screwing jig 200 in which the conventional inner screw part 214 and the outer screw part 223 are locked and screwed together, the same screwing strength is ensured. The screwing amount is 1 in the screwing jig 100 in which the two screw portions of the 114 and the second outer peripheral screw portion 123 and the first inner screw portion 115 and the second inner peripheral screw portion 124 are engaged with each other. / 2 can be secured. Accordingly, since the same screwing strength can be secured with a small screwing amount, the screwing work can be reduced, and the satisfaction of the user who uses the screwing jig 100 can be improved.
Further, in the case of the screwing jig 200, since the height of the screw insertion part and the screwing allowable part can be reduced by half compared to the screwing jig 200, the screwing jig 200 can be downsized while ensuring the same screwing strength. .

In the correspondence between the embodiment described above and the configuration of the present invention,
The liquid enclosure corresponds to the water storage tank 2 and
The inside of the liquid enclosure corresponds to the inside 2a,
The openings and the cylindrical openings correspond to the cylindrical openings 20, 40, 40 ′, the inverted frustoconical opening 90,
The inner cylindrical opening corresponds to the threaded auxiliary water stop valve 60 ′, and the sealing cap corresponds to the water stop caps 10, 10 ′, 10 ″, 30, 30 ′, 70 and the insertion plug 80. And
The lid structure corresponds to the high water-stop cap structure 1, 1A, 1B, 1C, 1D, 1E, 1F, 1F ′,
The main body side screw portion corresponds to the main body side screw threads 21 and 41 and the main body side screw thread 61bb,
The cap body portion corresponds to the circular upper surface 11, 31, 71,
The ring part and the outer ring part correspond to the outer ring parts 12, 72 and the ring part 32,
The cap side thread portion corresponds to the cap side thread 14,
The body-side external thread portion corresponds to the body-side external thread 21a, 41a,
The cap-side outer thread portion corresponds to the cap-side outer thread 14a, 14a ′ and the cap-side thread 34,
The second ring portion corresponds to the inner ring portion 13,
The body-side inner thread portion corresponds to the body-side inner thread 21b, 41b,
The cap-side inner thread portion corresponds to the cap-side inner thread 14b, 14b ′,
The opening end corresponds to the opening upper end 20c, the opening upper end 40c, the lower end opening 61ba,
The middle cap corresponds to the inner cap 50,
The opening end corresponds to the opening lower end 40d, the lower end opening 61ba,
The opening closing means and the covering closing means correspond to the waterproof umbrella portion 62b and the lower end waterproof portion 75,
The circular fitting means corresponds to the circular fitting mechanism 4 or the M-shaped circular fitting mechanism 5,
The first member corresponds to the screwing permission portion 111,
The inner peripheral surface of the first member corresponds to the female side inner peripheral surface 111a,
The first inner cylindrical portion corresponds to the first inner cylindrical portion 112,
The outer peripheral surface of the first inner cylindrical portion corresponds to the female-side outer peripheral surface 112b, and the second member corresponds to the screw insertion portion 121.
The inner peripheral surface of the second member corresponds to the male side inner peripheral surface 121a,
The outer peripheral surface of the second member corresponds to the male side outer peripheral surface 121b,
The screwing structure corresponds to the screwing jig 100 but is not limited to the above embodiment.

  For example, the water storage tank unit 2 in the above-described embodiment is used as a hot water bottle or a liquid storage container. For example, the water storage tank unit 2 is a seasoning container that encloses a liquid seasoning such as ra oil that is difficult to use due to liquid leakage. Also good.

  Furthermore, the auxiliary water stop valve 60 and the threaded auxiliary water stop valve 60 ′ include a spring 63, and the water stop umbrella portion 62b is pushed downward by the urging force of the spring 63 so that the lower end opening 61ba and the upper part of the movable valve 62 are located above. A gap was formed between them, but when the inner ring portion 13 ′ or the intermediate ring portion 16 and the screw insertion shaft 62 a of the movable valve 62 are eliminated, the movable valve 62 moves downward due to its own weight. Even if the spring 63 is not provided, the above effect can be obtained.

1, 1 ', 1'', 1A, 1B, 1C, 1D, 1E, 1F, 1F' ... High water-stop cap structure 2 ... Water storage tank portion 2a ... Inside 4 ... Circular fitting mechanism 5 ... M-shaped cross-section circular fitting Joint mechanism 10, 10 ', 30, 30', 70 ... Water stop cap 11, 31, 71 ... Circular upper surface 12, 72 ... Outer ring portion 14, 34 ... Cap side thread 14a ... Cap side outer thread 14b, 14b '... Cap side inner threads 20, 20', 40, 40 '... Cylindrical openings 20a, 40a ... Outer peripheral surfaces 20b, 40b ... Inner peripheral surfaces 20c, 40c ... Upper end opening portion 21 ... Main body side threads 21a, 41a ... Body side outer thread 21b, 41b ... Body side inner thread 32 ... Ring part 40d ... Opening lower end 50 ... Inner cap 60 '... Threaded auxiliary water stop valve 61ba ... Lower end opening 62b ... Water stopping umbrella part 72b ... Cap side Thread 74 ... Upper end water stop 75 ... Lower end stop Water part 80 ... Insertion plug 90 ... Reverse truncated cone opening 100 ... Screwing jig 111 ... Screwing allowable part 111a ... Female side inner peripheral surface 112 ... First inner cylindrical part 112b ... Female side outer peripheral surface 114 ... First outer side Screw part 115 ... first inner screw part 121 ... screw insertion part 121a ... male side inner peripheral surface 121b ... male side outer peripheral surface 123 ... second outer peripheral side screw part 124 ... second inner peripheral side screw part

Claims (10)

A screwing structure for screwing a first member having a cylindrical inner peripheral surface and a cylindrical second member having an outer peripheral surface having a smaller diameter than the inner peripheral surface of the first member;
The second member is formed in a ring shape having a cylindrical inner peripheral surface,
A cylindrical first inner cylindrical portion having an outer peripheral surface having a smaller diameter than the inner peripheral surface of the second member, on the inner side of the inner peripheral surface of the first member,
The outer peripheral surface of the second member is provided with a spiral second outer peripheral screw portion, and the inner peripheral surface of the second member is provided with a spiral second inner peripheral screw portion,
The first member includes a first outer threaded portion that engages with the second outer circumferential threaded portion on the inner circumferential surface, and the second inner circumferential threaded portion on the outer circumferential surface of the first inner cylindrical portion. A first inner threaded portion for locking;
The first member and the second member are screwed together by locking the second outer periphery screw portion and the first outer screw portion, and the second inner periphery screw portion and the first inner screw portion. Screwed structure. A cylindrical opening that is formed in a liquid enclosure that encloses the liquid, communicates the inside and outside of the liquid enclosure, and projects in a cylindrical shape from the liquid enclosure;
A lid structure for a liquid enclosure comprising a sealing cap for sealing the cylindrical opening,
Forming a spiral body-side screw portion on the outer peripheral surface of the cylindrical opening, and forming a spiral body-side inner screw portion on the inner peripheral surface of the cylindrical opening;
The cylindrical opening is the second member, the main body-side screw portion is the second outer peripheral screw portion, the main body-side inner screw portion is the second inner peripheral screw portion,
The sealing cap portion is disposed inside the cap main body portion, the outer ring portion protruding in a ring shape from the cap main body portion, and the inner diameter of the outer ring portion, and the inner diameter is smaller than the inner diameter of the cylindrical opening. As it is integrated with the cylindrical part,
A cap-side screw portion that engages with the main body-side screw portion is formed on the inner peripheral surface of the outer ring portion, and a cap-side inner screw portion that engages with the main body-side inner screw portion on the outer peripheral surface of the inner cylindrical portion. Form the
The sealing cap portion is the first member, the inner cylindrical portion is the first inner cylindrical portion, the cap side screw portion is the first outer screw portion, and the cap side inner screw portion is the first inner side. With the screw part,
A lid structure for a liquid enclosure, wherein the cylindrical opening and the sealing cap are screwed together using the screwing structure according to claim 1. At least one of the inner peripheral surface of the outer ring portion, the outer peripheral surface of the inner cylindrical portion, the inner peripheral surface of the cylindrical opening, and the outer peripheral surface of the cylindrical opening, the sealing cap portion and the cylindrical shape The lid structure for a liquid enclosure according to claim 2, wherein the lid structure is formed with an inclined surface that is inclined with respect to a fitting direction with the opening. A second member having a cylindrical outer peripheral surface having a spiral first screw portion on the inner peripheral surface of the first member having a cylindrical inner peripheral surface and having a smaller diameter than the inner peripheral surface of the first member. A second screw portion that engages with the first screw portion is provided on the outer peripheral surface of the member, and the first member and the second member are engaged with the first screw portion and the second screw portion. Use the screwing structure to screw
Formed in a liquid enclosure for enclosing the liquid, communicating the inside and the outside of the liquid enclosure, a cylindrical opening projecting in a cylindrical shape from the liquid enclosure, and a seal for sealing the cylindrical opening A lid structure of a liquid enclosure constituted by a stop cap portion,
Forming a spiral body-side screw portion on the outer peripheral surface of the cylindrical opening,
While the cylindrical opening is the second member, the main body side screw portion is the second screw portion,
The sealing cap portion is integrally formed of a cap main body portion and a ring portion projecting in a ring shape from the cap main body portion, and a cap that is locked to the main body side screw portion on the inner peripheral surface of the ring portion. Forming the side thread,
While making the said sealing cap part into the said 1st member, the said cap side screw part is made into the 1st screw part,
The cylindrical opening and the sealing cap portion are screwed together so as to be able to be sealed by the screwing structure,
A lid structure for a liquid enclosure including a liquid leakage prevention reinforcing means for reinforcing liquid leakage prevention performance for preventing liquid leakage from the sealed cylindrical opening. The liquid leakage prevention reinforcing means,
5. The liquid sealing according to claim 4, comprising: an adhesion improving unit that increases adhesion between the sealing cap part and the cylindrical opening according to screwing between the sealing cap part and the cylindrical opening. Body lid structure. A middle cap that is closed so as to cover the opening end on the outside of the cylindrical opening;
The adhesion improving means,
The liquid according to claim 5, wherein adhesion between the inner cap and the opening end on the outside of the cylindrical opening is increased in accordance with screwing between the sealing cap and the cylindrical opening. Enclosure lid structure. The liquid leakage prevention reinforcing means,
6. The apparatus according to claim 5, comprising an opening closing means for closing an opening end portion of the cylindrical opening inside the liquid sealing portion according to screwing between the sealing cap portion and the cylindrical opening. Lid structure of liquid enclosure. The opening closing means;
8. The lid of the liquid enclosure according to claim 7, wherein the lid of the liquid enclosure is configured by covering and closing means that approaches the opening end portion and covers the opening end portion according to screwing of the sealing cap portion and the cylindrical opening portion. Construction. A second member having a cylindrical outer peripheral surface having a spiral first screw portion on the inner peripheral surface of the first member having a cylindrical inner peripheral surface and having a smaller diameter than the inner peripheral surface of the first member. A second screw portion that engages with the first screw portion is provided on the outer peripheral surface of the member, and the first member and the second member are engaged with the first screw portion and the second screw portion. Use the screwing structure to screw
An inner cylindrical opening that is formed in a liquid enclosure for enclosing a liquid, communicates the inside and the outside of the liquid enclosure, and protrudes inward in a cylindrical shape from the liquid enclosure; and the inner cylindrical opening A lid structure of a liquid enclosure constituted by a sealing cap portion to be sealed,
Forming a spiral body-side screw portion on the inner peripheral surface of the inner cylindrical opening,
While the inner cylindrical opening is the first member, the main body side screw portion is the first screw portion,
The sealing cap part is configured integrally with a cap body part and a ring part protruding in a ring shape from the cap body part,
On the outer peripheral surface of the ring portion, a cap-side screw portion that is locked to the main body-side screw portion is formed, and on the inner peripheral surface of the ring portion, a cap-side inner screw portion is formed,
While the sealing cap part is the second member, the cap-side screw part is a second screw part,
The inner cylindrical opening and the sealing cap part are screwed together so as to be sealable by the screwing structure,
As a liquid leakage prevention reinforcing means for reinforcing liquid leakage prevention performance to prevent liquid leakage from the sealed inner cylindrical opening, according to the screwing of the sealing cap portion and the inner cylindrical opening, A lid structure for a liquid enclosing body provided with a covering closing means that is screwed onto the cap-side inner threaded portion to approach the opening end of the inner cylindrical opening inside the liquid enclosing portion and covers the opening end. 3. A circular fitting means that is concentric with the cylindrical opening and fitted in the screwing direction is provided on a radially outer side of the cylindrical opening and in a corresponding portion of the sealing cap. The lid structure of the liquid enclosure according to any one of 9.

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