JP2006160278A - Cap seal structure of liquid container - Google Patents

Abstract

【Task】
With regard to caps for liquid containers such as portable magic bottles, a reliable sealing state is realized with a light force.
[Solution]
In a liquid container that includes a cap 3 that can be freely opened and closed at the spout 2 and seals the spout 2 by closing the cap 3, a packing support rod 4 is projected from the inner surface of the cap 3 that faces the spout 2 of the container body 1. . A substantially cylindrical packing 5 having an outer flange 6 formed at the upper end is attached to the packing support rod 4, and when the cap 3 is closed, the opening edge 2 a of the spout 2 abuts against the bottom surface of the outer shell 6 of the packing 5. Then, the sealing state of the spout is realized by the bending elasticity of the outer casing 6. Sealing can be performed within the range of the deflection dimension of the outer casing 6 of the packing 5, and the change in the position of the packing 5 and the spout 2 due to the dimensional error of the parts is absorbed by the deflection of the outer casing 6.
[Selection] Figure 1

Description

  The present invention relates to a cap seal structure that is mainly a liquid container such as a portable fountain bottle or a water bottle and is sealed with a cap that closes the spout.

As disclosed in Patent Literature 1 and Patent Literature 3, a cap is screwed into a liquid outlet such as a portable fountain bottle or a water bottle, and the packing attached to the cap is compressed at the opening edge of the spout. In addition to what is sealed, as disclosed in Patent Document 2, a cap that can be freely opened and closed is provided at the spout, and a seal attached to the cap is pressed against the spout and sealed. That is, the caps disclosed in Patent Document 1 and Patent Document 3 are those in which the cap is screwed directly to the member where the spout is formed, and the cap disclosed in Patent Document 2 is a portion other than the spout, More specifically, the cap is pivotally supported on a member other than the one where the spout is formed, the spout can be opened and closed by the pivoted cap, and the spout is sealed by the pressing force of the pivoted cap.
JP 2003-155050 A JP 2003-327265 A JP 2002-165708 A

In the conventional cap structures disclosed in Patent Documents 1 and 3, since the seal state of the cap is realized by the adhesiveness accompanying the compression deformation of the packing, it is necessary to strongly tighten the cap with a screw. As disclosed in Patent Document 2, when the cap packing is pressed against the spout portion by opening / closing the cap that is pivotally supported on a portion other than the spout, a large force, that is, a large pressure that compresses and deforms the packing. There is a drawback that a sufficient sealing effect cannot be exhibited unless the packing is pressed with force.
Moreover, the stopper part structure disclosed by patent document 2 is in the state which cannot isolate | separate the outer cylinder part which is a separate member from the inner cylinder part which provided the packing closely_contact | adhered to the opening part of a vacuum double bottle, and pierced the spout A lid member (cap) that can be freely opened and closed is pivotally attached to the outer cylinder portion during assembly. As described above, in the case where the plug portion is constituted by a plurality of members, the pressing force of the packing is not necessarily constant due to a manufacturing dimensional error of each member, and it is difficult to realize a stable sealing state.

The present invention has been made in view of the above-mentioned drawbacks of the prior art and aims to eliminate the disadvantages of the prior art. That is, a seal structure that can realize a reliable sealing effect with a small force when mounting the cap, has a large deformation range of the packing that exhibits the sealing effect, and can absorb variations in product dimensions, etc. It is intended to be realized.
Still another object is that, as shown in Patent Document 2, when the stopper provided with the packing closely contacting the opening of the vacuum double bottle and the stopper cover for holding the stopper are configured as separate parts, the stopper and stopper A liquid container that can be separated from the cover and can be separated and cleaned is realized, and a sealing structure that maintains a sufficient sealing effect even in such a case is realized.

  In order to achieve the above-mentioned object, the spout 2 is formed by the cap 3 that is detachably attached to the spout 2 or the cap 3 that is pivotally supported on a portion other than the spout 2 by the packing 5 that includes the spout 2. In the liquid container to be sealed, a packing support rod 4 protrudes from the inner surface of the cap 3 facing the spout 2 of the container main body 1, and a substantially cylindrical packing 5 having an outer rod 6 formed at the upper end of the packing support rod 4. Wear. When the cap 3 is attached or closed, the opening edge 2a of the spout 2 abuts against the bottom surface of the outer casing 6 of the packing 5 to push up this portion, and the sealing state is maintained by the flexural elasticity of the outer casing 6 of the packing 5. Let

At this time, a space X is secured between the bending range of the outer casing 6 of the packing 5 attached to the packing support casing 4 and the inner surface of the cap 3 so that the outer casing 6 of the packing does not contact the inner surface of the cap 3. If this is done, it will be difficult for heat to be transferred from the packing 5 to the cap 3.
Further, the packing support rod 4 protruding from the inner surface of the cap 3 is formed into a blind cylinder shape that opens downward, and the packing 5 attached to the packing support rod 4 is formed into a blind cylinder shape having an outer rod 6 at the upper end. When the vertical groove 7 is formed on the outer peripheral surface of the flange 4 to release air, the space 26 surrounded by the packing support flange 4 and the packing 5 functions as a heat insulating layer, and at the same time, the flow of air passing through the groove Eliminates pressure changes due to temperature changes in the space.

  The liquid container can be removably mounted with a stopper set 8 on the shoulder of the container body 1. The stopper set 8 has a cap 9 having a packing 9 in close contact with the opening of the container body 1 and a cylindrical spout 2 protruding upward, and a cylindrical spout 2 formed in the stopper 10 passes therethrough. In addition, a stopper support tube 11 that is fitted in a watertight state and is slidable in the axial direction and a cap 3 that can be opened and closed, and a stopper cover 12 that is detachably attached to the shoulder portion of the container body 1 are configured. The stopper 10 and the stopper cover 12 are separable and can be cleaned separately.

  In the above case, a dimension B that is slidable in the axial direction between the stopper support cylinder 11 formed on the stopper cover 12 and the cylindrical spout 2 formed on the stopper 10 is mounted on the packing support rod 4 of the cap 3. If the deflection dimension A of the outer shell 6 of the packing 5 is made larger, the stopper 10 and the stopper cover 12 will not be separated by the elasticity of the outer casing 6 when the stopper set 8 is removed from the container body 1, and the stopper 10 and the stopper cover 12 can be handled as a stopper set 8 in a combined state.

  According to the cap seal structure of the liquid container of the present invention described in claim 1, when the spout 2 can be opened and closed by the cap 3 pivotally supported on a portion other than the spout, the cap 3 is connected to the spout portion as in the prior art. The cap 3 can be closed with a small force and a reliable sealing state can be realized. Further, even if there is a large dimensional error in each part, the sealing state can be maintained in the deflection range of the outer shell of the packing 5, so that a dimensional error in parts and assembly can be allowed.

  According to the second aspect of the present invention, when the cap 3 is directly attached to the spout 2, the cap 3 can be attached with a small force. That is, when the cap 3 is screwed, the conventional liquid container needs to be tightened with a large force that compresses and deforms the packing, but in the present invention, the force is small enough to bend the outer shell 6 of the packing 5. In other words, the torque for closing the cap 3 is small, and in particular, since the rise of the torque immediately before the cap is fully closed is excellent, the operability is excellent and a reliable sealing state can be realized.

According to the invention described in claim 3, since the space formed by the blind cylindrical packing support rod 4 and the blind cylindrical packing 5 functions as a heat insulating layer, the heat retaining effect can be improved. And air can be distribute | circulated by the groove | channel 7 formed in the outer peripheral surface of the packing support rod 4, the pressure change which generate | occur | produces by a temperature change can be eliminated, and it can utilize as a liquid container for any of heat insulation and cold preservation.
According to the invention described in claim 4, since the packing 5 affected by the liquid temperature and the cap 3 affected by the outside temperature do not come into contact with each other, the heat conduction is cut off and the heat retaining property of the liquid container is improved. be able to.

  According to the fifth aspect of the present invention, the detachable plug set 8 is provided on the shoulder portion of the container body 1, and the plug set 8 is constituted by the separable plug 10 and the plug cover 12, and the two are separated. Can be washed separately. In this case, the sealing state can be maintained in a wide range against the dimensional error of each component and the variation of the mounting state. According to the sixth aspect of the present invention, when the stopper set 8 is removed from the container body 1, the plug 10 and the plug cover 12 can be handled without being separated.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a cap seal structure for a liquid container according to the present invention will be described with reference to the accompanying drawings.
1 is a longitudinal sectional view of only the upper part of a liquid container showing an embodiment of the present invention, FIG. 2 is a perspective view of the entire liquid container, and FIG. 3 is a longitudinal sectional view of a stopper set in an exploded state.

  The portable magic bottle of the illustrated embodiment has a container body 1 with a base body 14 fixed to the bottom of a vacuum double bottle 13 having a relatively large capacity and a shoulder member 15 fixed to the top, and a stopper set 8 is attached to the container body 1. It is detachably mounted. Handle support rods 16 project from the left and right sides of the shoulder member 15 of the container body 1 and a portal handle is attached so that it can be carried by hand.

  This portable magic bottle uses a relatively large-capacity vacuum double bottle and is intended to be used when one person rehydrates during sports. Therefore, the cap 3 that can be freely opened and closed is attached to the stopper set 8, and the cap 2 is opened by opening the cap. A long hole 18 is formed in the portal handle attached to the shoulder member 15, and a handle support rod 16 is engaged with the long hole 18. Therefore, it is possible to move the engagement position of the handle support bar along the long hole at the same time as it is tilted sideways so that the handle 17 does not get in the way when drinking.

  The cap 3 is biased in the opening direction by a spring 19 and can be opened instantaneously by pressing the open / close button 20 provided on the front face of the plug set 8, and the cap 3 is not opened carelessly. The stopper cover 12 is provided with a lock button 21 that is unable to press the open / close button by being moved in the circumferential direction.

  As shown in FIG. 3, the stopper set 8 includes a substantially cap-like stopper cover 12 and a stopper 10 that can be screwed onto the shoulder member of the container body 1, and the stopper cover 12 and the stopper 10 are free. So that they can be separated. That is, a cylindrical plug support tube 11 is formed on the top wall portion of the cap cover 12 formed in a cap shape, and an openable / closable cap 3 is pivotally supported on the rear portion of the plug support tube 11. On the front surface of the stopper cover 12, an open / close button 20 that performs a seesaw motion while keeping the cap closed by a spring 22 is disposed.

  The stopper 10 has a cap shape with a spout 2 that opens upward, and a packing 9 is attached to the outer periphery of the lower end. As shown in FIG. 1, the packing 9 maintains a sealed state in close contact with the opening of the vacuum double bottle 13, particularly the throttle portion 13 a. The spout 2 formed in the stopper 10 is fitted in the stopper support cylinder 11 of the stopper cover 12 and is slidable in the axial direction in a sealed state, that is, in a watertight state. The stopper 10 and the stopper cover 12 are freely assembled, It can also be separated.

  In order to fit the spout 2 of the stopper 10 into the stopper support cylinder 11 of the stopper cover 12 and make it slidable in the axial direction in a watertight state, the inner diameter of the stopper support cylinder 11 and the outer diameter of the outlet 2 are loose. The packing 23 is attached to the lower end portion of the spout 2 in accordance with the dimensional relationship of the fitting, and the protrusion 24 formed on the packing 23 is brought into close contact with the inner surface of the plug support cylinder 11. Thereby, it can move freely with a light force and can maintain a watertight state. A low protrusion 25 is formed on the inner surface of the lower end of the stopper support tube 11 so that the movement is locked.

  On the inner surface of the cap 3 provided on the stopper cover 12, a substantially cylindrical packing support rod 4 having a lower end opened is formed so as to protrude, and the packing 5 is attached to the packing support rod 4. The packing 5 attached to the packing support rod 4 is substantially cap-shaped and forms an outer collar 6 at the upper end, which is an opening edge, and is the upper end of the spout 2 that protrudes from the stopper support cylinder 11 when the cap 3 is closed. The opening edge 2a comes into contact with the bottom surface of the outer casing 6 and pushes the outer casing 6 at the position indicated by the dotted line in FIG. At this time, the opening edge 2a and the outer shell bottom face are brought into close contact with each other by the bending elasticity of the outer casing 6, and the sealed state is maintained.

  When the blind cylindrical packing 5 is attached to the blind cylindrical packing support rod 4, the internal space is sealed. Since the air in this space expands and contracts depending on the temperature of the beverage contained in the liquid container and the external environment, there is a possibility that the mounting position of the packing may shift or come off. Therefore, as shown in FIG. 4, the packing support rod 4 of the illustrated embodiment is provided with a vertical groove 7 on the outer peripheral surface so that air can be vented.

  The packing support rod 4 protruding from the inner surface of the cap 3 may be a solid bar. Furthermore, the packing 5 may not be a blind cylinder but may be a simple cylinder. However, as in the illustrated embodiment, the packing 5 is in the form of a blind cylinder and the space 26 is formed, so that the space 26 functions as a heat insulating layer and has an effect of improving the heat retention of the liquid container. Further, in the illustrated embodiment, the space X is held so as not to contact the inner surface of the cap 3 when the outer casing 6 of the packing 5 is pushed up. Thereby, the space X also functions as a heat insulating layer, and further improves the heat retention of the liquid container. That is, heat can be prevented from being transferred to the cap by heat conduction from the packing 5.

  The liquid container of the embodiment shown in FIG. 5 is the same as the liquid container of the embodiment shown in FIG. 1 as a basic configuration. The liquid container is mainly a medium-capacity portable magic bottle. In the stopper set 8, a cap 3 having a size matching the entire upper surface of the stopper cover 12 is pivotally supported on the rear end portion of the stopper cover 12 so as to be freely opened. It is said. Further, the opening / closing button 20 disposed at the front end of the stopper cover is formed so as to slide in the front-rear direction instead of the seesaw motion.

  The liquid container of the embodiment shown in FIG. 6 is mainly applied to a small-capacity portable magic bottle. In the liquid container of this embodiment, in the stopper set, the cap 3 is screwed onto the stopper cover 12 and a connecting string 27 is provided between the cap 3 and the shoulder member 15 to prevent the cap 3 from being lost. ing. In this case, a portion in the cylinder of the packing support rod 4 that was a blind cylinder in the previous embodiment is opened upward, and a locking member 28 for the connecting string 27 is disposed therein.

  In the case of the liquid container of the embodiment shown in FIG. 6, since the cap 3 is screwed to the stopper 2 in which the spout 2 is formed, the opening edge 2a of the spout 2 is connected with the tightening force for screwing. The outer casing 6 of the packing 5 is pressed. The conventional screw-type cap is configured to maintain the sealing state in such a manner that the packing is compressed and deformed. However, in the present invention, the opening edge of the cap and the packing are brought into close contact by the bending elasticity of the outer shell 6 of the packing. ing. That is, the cap can be attached with a light force from the contact position of the packing collar 6 and the spout 2a shown in FIG. 7A to the tightening position shown in FIG. can do. In particular, in the conventional liquid container at the final stage of screwing, it was necessary to tighten the cap strongly, but in the present invention, it can be attached with a light force even at the final stage of screwing, and the operability is improved. There is an effect that can.

  The liquid container of the embodiment shown in FIG. 6 is provided with a stopper 10 that is movable with respect to a shoulder member 15 attached to a vacuum double bottle 13 that contains a beverage, and a cap 3 at a spout 2 formed in the stopper 10. It is to be screwed. The cap sealing structure according to the present invention can also be applied to a cap screwed into a spout formed in a container for containing a liquid, such as a PET bottle.

  In the liquid container according to the embodiment shown in FIGS. 1 to 5, the stopper cover 12 of the stopper set 8 is screwed onto the shoulder member 15 attached to the vacuum double bottle 13 for containing a beverage. The stopper 10 is provided so that the spout 2 formed in the stopper 10 is closed by the cap 3 provided on the stopper cover 12. Therefore, in the structure in which the sealed state is realized by pressing the cap with a strong force such that the packing of the cap is compressed and deformed like the conventional cap seal structure disclosed in the cited document 2, the plug 10 and the plug cover 12 are realized. If the structure is separable, the cap 10 itself cannot be pushed down by the cap to achieve a sufficient sealing state. In addition, although the size range that can be sealed by compression deformation is narrow and dimensional errors due to parts and assembled states cannot be absorbed, in the present invention, sealing is performed in a bending range that is a relatively small force of the outer shell 6 of the packing. Since the state can be maintained, the liquid container having the configuration shown in FIGS. 1 to 5 can be realized.

  As shown in FIGS. 1 to 5, in the liquid container in which the stopper 10 and the stopper cover 12 can be separated, the packing 9 attached to the lower end of the stopper is formed in the inner bottle portion of the vacuum double bottle 12. Abutting against the narrowed portion 13a, the portion is sealed. On the other hand, since the stopper cover 12 is attached to the outer bottle portion of the vacuum double bottle, the position serving as a reference for the positioning of the stopper 10 and the stopper cover 12 is different, and the vacuum double bottle has its characteristics, A large dimensional error cannot be avoided. This dimensional error is absorbed by the axial sliding of the stopper support cylinder 11 of the stopper cover 12 and the spout 2 of the stopper 10. However, if the stopper support tube 11 of the stopper cover and the outlet 2 of the stopper slide in the axial direction, the positional relationship between the outlet 2 and the cap 3 changes. The change in the positional relationship, in other words, the dimensional error is absorbed by the deflection of the outer casing 6 of the packing 9, and the sealed state can be maintained.

  When handled as a plug set 8 in which the plug 10 and the plug cover 12 are combined, the plug 10 may be pushed down due to the bending elasticity of the outer casing 6 of the packing 5, and the plug 10 may be detached from the plug cover 12. Therefore, as shown in an enlarged view in FIG. 1, the axial sliding dimension B between the stopper support cylinder 11 of the stopper cover 12 and the spout 2 of the stopper 10 is set larger than the deflection dimension A of the outer casing 6 of the packing. Keep it. Accordingly, when the plug set 8 is handled alone, it is possible to prevent the plug 10 from dropping even when the cap is closed.

A longitudinal sectional view of only the upper part of the liquid container according to the embodiment of the present invention, The perspective view of the whole liquid container concerning the embodiment of the present invention, A liquid container according to an embodiment of the present invention, a longitudinal cross-sectional view of a stopper set in an exploded state, IV-IV sectional view of FIG. The longitudinal cross-sectional view only of the upper part of the liquid container which concerns on another embodiment of this invention, A longitudinal sectional view of only the upper part of a liquid container according to still another embodiment of the present invention, The expanded sectional view of the packing part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Container body, 2 ... Spout, 5a ... Opening edge, 3 ... Cap, 4 ... Packing support rod, 5 ... Packing, 6 ... Outer casing, 7 ... Groove, 8 ... Plug set, 9 ... Packing, 10 ... Plug 11 ... Plug support cylinder, 12 ... Plug cover, 13 ... Vacuum double bottle, 13a ... Throttle part, 14 ... Bottom body, 15 ... Shoulder member, 16 ... Handle support rod, 17 ... Handle, 18 ... Long hole, 19 ... Spring, 20 ... Open / close button, 21 ... Lock button, 22 ... Spring, 23 ... Packing, 24 ... Projection, 25 ... Projection, 26 ... Space, 28 ... Locking member, X ... Space.

Claims (6)

In a liquid container in which a cap for closing the spout is pivotally supported on a portion other than the spout, the spout can be opened and closed freely by the cap, and the spout is sealed by closing the cap.
A packing support rod is projected on the inner surface of the cap facing the spout, and a substantially cylindrical packing with an outer flange formed on the upper end is attached to the packing support rod.
A cap seal for a liquid container, wherein when the cap is closed, the opening edge of the spout abuts against the bottom surface of the outer shell of the packing to push up the portion, and the sealing state is maintained by the bending elasticity of the packing outer shell. Construction. In a liquid container that attaches a detachable cap to the spout portion, and seals the spout by packing provided on the cap by attaching the cap.
A packing support rod is protruded from the inner surface of the cap facing the spout, and a substantially cylindrical packing having an outer flange formed on the upper end is attached to the packing support rod.
A cap seal structure for a liquid container, wherein the opening edge of the spout abuts against the bottom surface of the packing outer shell when the cap is attached, pushes up the portion, and maintains the sealed state by the flexural elasticity of the packing outer shell. .   The packing support rod protruding from the inner surface of the cap has a blind cylinder shape that opens downward. 3. A cap seal structure for a liquid container according to claim 1, wherein a vertical groove is formed for removal.   The liquid according to any one of claims 1 to 3, wherein a space is secured between a deflection range of a packing outer casing attached to the packing support casing and an inner surface of the cap, and the packing outer casing does not contact the inner surface of the cap. Container cap seal structure.   The liquid container is provided with a detachable stopper set on the shoulder of the container main body, the stopper set having a packing closely contacting the opening of the container main body and a cap-shaped spout protruding upward. A stopper support cylinder that can be slid in the axial direction in a watertight state and a cap that can be opened and closed, and a cap that can be opened and closed. The cap seal structure for a liquid container according to any one of claims 1 to 4, wherein the cap seal structure is configured by a cap cover that is free, and a spout protruding from the plug support tube of the plug cover is sealed by a cap provided on the plug cover.   The axially slidable dimension between the stopper support cylinder formed on the stopper cover and the cylindrical spout formed on the stopper is made larger than the deflection dimension of the outer shell of the packing attached to the packing support flange of the cap. The cap seal structure for a liquid container according to claim 5.

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