JP2018165534A - Water cut-off structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water-stop structure used for connecting pipes, which is hygienic and has high design while improving watertightness at a connecting portion. SOLUTION: A water blocking member 4 is an annular water blocking packing made of an elastic material such as rubber, and an annular convex portion 41a and a convex portion 41b are formed on the upper surface and the lower surface thereof. Here, the convex portion 41a includes groove portions 42 and 42 formed at the rising portion on the inner peripheral side and an inclined surface 43 formed at the upper end of the convex portion 41 as means for regulating the tilting direction. The groove portion 42 is a concave portion formed so that the water blocking member 4 becomes thin in the vertical direction, and guides the convex portion 41a to fall inward. Further, the inclined surface 43 is inclined in the tilting direction of the convex portion 41a, that is, the tip of the convex portion 41a is tapered from the outside to the inside, and when stress is applied to the inclined surface 43 in the vertical direction. , A part of the stress is converted into the stress in the inner peripheral direction of the water blocking member 4. [Selection diagram] Fig. 3

Description

  The present invention relates to a water stop structure used when connecting pipes.

  Conventionally, when pipes are connected, a structure is known in which a water stop member made of an elastic material such as rubber is arranged at the connection part in order to prevent water leakage from the connection part.

Patent Document 1 describes a water stop structure used for connecting pipes. In the water stop structure, the pipe is a drain that is attached to an opening formed on the bottom surface of the sink and forms a drain, and has a flange portion that extends outward at the upper end. The connected member to which the pipe is connected is a sink. In Patent Document 1, a pipe is screwed to a nut via a sink, and the flange portion and the nut are connected to the sink in a watertight manner by sandwiching the opening periphery of the bottom of the sink via a water stop member. The water stop member is an annular shape made of an elastic material such as rubber, and has an annular convex portion protruding toward the flange portion on the upper surface, and the convex portion is in pressure contact with the pipe. Improves water tightness.

Here, as shown in FIG. 10A, when caulking is performed on the flange portion of the drainage device, the drainage may enter the pipe through the gap C between the flange portion and the caulking portion. Therefore, as shown in FIG. 10B, a convex portion is formed at the outer peripheral end portion of the water-stopping member, and the convex portion is configured to be in contact with a caulking portion that is outside the gap C. It became possible to prevent the intrusion of drainage from C.
Further, the conventional water stop member shown in FIG. 10 is unsanitary because drainage and soot accumulate on the outside of the convex portion, but the water stop member shown in FIG. By forming the convex part, it becomes possible to prevent drainage, dust, etc. from accumulating outside the convex part as in the case of a conventional water-stopping member, and the pipe or the connected member has a caulking part. Even if not, it was useful.

  However, as shown in FIG. 12 (a), when the pipe is connected using the water stop member, as shown in FIG. 12 (b), when the pipe is connected, it is directed toward the outside of the pipe. When a convex part fell down, the said convex part which fell down was exposed from the outer side of piping, and the new problem that designability was impaired occurred.

JP 2002-13175 A

  The present invention has been invented in view of the above problems, and relates to a water stop structure used for connecting pipes, and aims to provide a water stop structure that is hygienic and highly designable while improving water tightness at the connection portion. And

The present invention according to claim 1 is a water stop structure used for connecting pipes,
A water-stopping member that is sandwiched between the pipe and the connected member to which the pipe is connected, and that stops water between the pipe and the connected member;
Convex portions formed on the water stop member and projecting toward the pipe or connected member;
It is a water stop structure which consists of a control means which controls the fall direction of the said convex part at the time of piping connection.

According to a second aspect of the present invention, the regulating means includes:
The waterstop structure according to claim 1, comprising a groove formed in the waterstop member along the convex portion on the collapse direction side of the convex portion.

According to a third aspect of the present invention, the regulating means includes:
The water stop structure according to claim 1, wherein the water stop structure is formed of an inclined surface that is formed on the convex portion and is inclined toward a falling direction.

The present invention according to claim 4 is characterized in that the regulating means is
The water stop structure according to claim 1, wherein the water stop structure is formed by an inclined surface that is formed in the pipe or the connected member and is inclined toward a falling direction of the convex portion.

The present invention according to claim 5 is characterized in that the regulating means is
The water stop structure according to claim 1, wherein the water stop structure is formed by a step portion formed toward the water stop member formed in the pipe or the connected member.

The present invention described in claim 6 is characterized in that the regulating means is
The water stop structure according to claim 1, wherein the convex portion is inclined toward the falling direction side.

  According to the present invention, it is possible to cause the convex portion to fall in an arbitrary direction by including the regulating means for regulating the falling direction of the convex portion. Accordingly, it is possible to prevent the deterioration of the design property due to the water stop member being exposed from the pipe or the connected member while improving the water tightness at the connection portion.

It is sectional drawing which shows the construction state of this invention. (A) Sectional drawing which shows drainage vicinity, (b) It is the A section enlarged view of Fig.2 (a). FIG. 4A is a cross-sectional view taken along the line A-A ′ of FIG. It is a principal part expanded sectional view which shows 2nd embodiment. It is principal part sectional drawing of the water stop member which concerns on 3rd embodiment. It is a principal part expanded sectional view which shows 4th embodiment. It is principal part sectional drawing of the water stop member which concerns on 5th embodiment. It is a principal part expanded sectional view which shows the example of a deformation | transformation at the time of a water stop member being pinched. It is a principal part expanded sectional view which shows the example of a deformation | transformation at the time of a water stop member being pinched. It is the (A) sectional view (b) which shows the conventional water stop structure, and the A section enlarged view of Drawing 10 (a). FIG. 12A is a cross-sectional view taken along the line A-A ′ of FIG. It is the (A) sectional view (b) which shows the conventional water stop structure, and the A section enlarged view of Drawing 12 (a).

  Below, the water stop structure of this invention is demonstrated, referring drawings. Note that the description given below facilitates understanding of the embodiment, and the present invention is not limited and understood by this. Moreover, in the following embodiment, up and down, right and left will be described based on the construction state shown in FIG. 1 unless otherwise specified.

  As shown in FIG. 1 thru | or FIG. 3, the water stop structure which concerns on 1st embodiment is a water stop structure used for the connection of piping, Comprising: The drainage device 2 as the piping P and the said drainage device 2 are connected. A sink 1 which is a member to be connected S, a drainage device 2 and a sink member 4 which is sandwiched between the sink 1 and stops water between the members are provided. The drainage device 2 is connected to an elbow pipe 5 and a drainage trap 6 on the downstream side.

  The sink 1 is a stainless steel tank having an upper opening, and is placed on a cabinet (not shown). Further, the sink 1 has an annular depression 11 formed in a plan view on the bottom surface, and a circular opening is formed inside the depression 11.

The drainage device 2 is a drainage pipe made of a hard resin such as polypropylene, and has a cylindrical body portion 21 whose upper side is opened, and a flange portion 22 is formed outward from the upper end of the body portion 21. A male screw portion 23 is threaded on the outer periphery of the barrel portion 21 from below the flange portion 22 to the middle of the barrel portion 21. In addition, a discharge port 24 is extended to the side of the bottom of the drainage device 2, and an elbow pipe 5 is connected to the discharge port 24. Further, the drainage device 2 has a crimping portion 25 that is crimped by a thin plate made of stainless steel.
Although the outer diameter of the trunk | drum 21 is smaller than the opening formed in the bottom face of the sink 1, the outer diameter of the flange part 22 is larger than the said opening. A female screw portion 31 of the nut 3 is screwed into the male screw portion 23 from the back side of the sink 1. Therefore, in a state where the drainage device 2 is attached to the sink 1, the back surface of the flange portion 22 abuts the opening periphery of the sink 1 via the water blocking member 4, and the opening periphery of the sink 1 is formed by the nut 3 and the flange portion 22. And the water stop member 4 is pinched.
The flange portion 22 has a tapered surface 26 formed on the lower surface side at the outer peripheral edge. The tapered surface 26 is inclined outward so that the upper surface side has a larger diameter than the lower surface of the flange portion 22.
As shown in FIG. 2, the caulking portion 25 is formed by covering a thin plate from the inside of the drainage device 2 to the upper surface of the flange portion 22 and the lower end of the tapered surface 26. Here, a gap C is formed between the end portion of the caulking portion 25 and the resin portion (non-caulking portion) on the lower surface of the flange portion 22.

The water stop member 4 is an annular water stop packing made of an elastic material such as rubber. An annular convex portion 41 is formed on the entire upper surface and lower surface of the water stop member 4, and the water stop member 4 has an upper surface and a lower surface. The lower surface is sandwiched between the drainer 2 and the sink 1. Further, as shown in FIG. 3, the water stop member 4 has an annular shape in a plan view and has a shape that is an object in the vertical and horizontal directions in the sectional view.
The convex portion 41 is a double ring composed of a convex portion 41a formed at the outer peripheral end portion of the water blocking member 4 and a convex portion 41b formed closer to the center than the convex portion 41a. The projection is provided in a direction in contact with the member S, that is, toward the bottom surface of the flange portion 22 and the bottom surface of the sink 1 in this embodiment. Further, as shown in FIG. 2B, in the construction completion state, the convex portion 41a abuts on the tapered surface 26 (caulking portion 25), and the convex portion 41b abuts on the resin portion (non-caulking portion) on the lower surface of the flange portion 22. The convex portion 41a stops water outside the gap C.
The convex part 41a is formed so that the overall height is larger than that of the convex part 41b. Accordingly, as shown in FIG. 3B, in the convex portion 41 formed on the upper surface side of the water-stopping member 4, the convex portion 41a extends to the upper side of the convex portion 41b, and the water-stopping member In the convex part 41 formed on the lower surface side of the convex part 41, the convex part 41a extends to the lower side than the convex part 41b.
Here, the convex portion 41a includes groove portions 42 and 42 formed at the rising portion on the inner peripheral side and an inclined surface 43 formed at the upper end of the convex portion 41 as a means for restricting the falling direction. The groove part 42 is a concave part formed so that the water stop member 4 is thin in the vertical direction, and guides the convex part 41a to fall inward. Further, the inclined surface 43 is inclined such that the tip of the convex portion 41a is tapered from the falling direction of the convex portion 41a, that is, from the outer side to the inner side, and when stress is applied to the inclined surface 43 in the vertical direction. A part of the stress is converted into stress in the inner circumferential direction of the water stop member 4.

  The elbow pipe 5 is a substantially L-shaped drainage pipe when viewed from the side. The elbow pipe 5 is formed with a horizontal pipe section whose upper end is connected to the discharge port 24, bent about 90 degrees from the horizontal pipe section, and a lower end connected to the drain trap 6. It consists of connected vertical pipes.

  The drain trap 6 has a substantially S-shape when viewed from the side, and is a drain pipe having a trap function that fills the internal drain flow path with the stored drainage and prevents bad smells and pests from entering the indoors. is there.

  The water stop structure according to the first embodiment of the present invention is connected as follows.

First, in a state where the water blocking member 4 is disposed below the flange portion 22 of the drainage device 2, the drainage device 2 is inserted from above into the opening formed on the bottom surface of the sink 1. Next, the nut 3 is passed through the body portion 21 from the discharge port 24 side, the female screw portion 31 of the nut 3 is screwed into the male screw portion 23, and the nut 3 is attached to the back surface of the sink 1. At this time, the water stop member 4 is sandwiched between the lower surface of the flange portion 22 and the upper surface of the sink 1 from above and below. Further, as shown in FIG. 2B, the convex portion 41a of the convex portion 41 abuts against the tapered surface 26 which is the crimped portion 25 of the flange portion 22, and the convex portion 41b is a hard resin portion which is a non-crimped portion. Abut.
When the water blocking member 4 is in contact with the flange portion 22, the convex portion 41 a is in contact with the tapered surface 26, so that the contact position with the flange portion 22 is higher than the convex portion 41. Since the convex portion 41a extends above the convex portion 41b, the convex portion 41a and the convex portion 41b abut against the flange portion 22 almost simultaneously.
When the screwing of the nut 3 and the drainage device 2 is advanced from the state where the water stop member 4 and the flange portion 22 are in contact with each other, the water stop member 4 is clamped by the flange portion 22 and the sink 1 and the convex portions 41a and 41 Water is stopped between the drainage device 2 and the sink 1 by applying pressure to the convex portion 41b from above and below. The water blocking member 4 crushed by the pinching pressure is compressed in the vertical direction and spreads outward in the radial direction. However, the convex portion 41 is in contact with the flange portion 22 and the sink, and is restricted in the falling direction. Because it has means, it tends to fall inward. That is, the convex part 41a has an inclined surface 43 on the upper side, and converts a part of the downward stress received from the flange part 22 into a stress in the falling direction of the convex part 41a, that is, inward in the circumferential direction. Further, since the convex portion 41a is formed with the groove portion 42 at the rising portion on the inner peripheral side, the convex portion 41a is more easily inclined to the inner side than the outer side. Therefore, when pinched by the flange part 22 and the sink 1, the falling direction of the convex part 41a is regulated inward. Accordingly, in the state where the drainage device 2 is connected to the sink 1, the water stop member 4 is not exposed from the outside of the flange portion 22.
Finally, the elbow pipe 5 and the drain trap 6 are connected to the discharge port 24, and the connection of the drain pipe is completed.

In the water stop structure of the present invention, since the convex portion 41a comes into contact with the caulking portion 25 of the flange portion 22, intrusion of drainage from the gap C between the caulking portion 25 and the non-caulking portion (hard resin portion) is prevented. Can do.
In addition, the present invention is provided with an inclined surface 43 and a groove 42 as a restricting means for the direction in which the convex portion 41 falls, and the convex portion 41 is restricted to fall inward when the pipe P is connected. Therefore, it is possible to prevent the design from being deteriorated due to the protrusion 41 being exposed from the outside of the flange portion 22 by the protrusion 41 falling to the outside.

  The second embodiment of the present invention will be described below. In addition, since the water stop structure described below is the same member as said 1st embodiment except the drainage device 2, the same number as 1st embodiment is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 4, the water stop structure according to the second embodiment is a water stop structure used for connection of a drain pipe, and is connected to the drain device 2 as the pipe P and the drain device 2. A sink 1 which is the member S, a drainage device 2 and a water stop member 4 which is sandwiched between the sink 1 and stops water between the members are provided. The drainage device 2 is connected to an elbow pipe 5 and a drainage trap 6 on the downstream side.

The drainage device 2 is a drainage pipe made of a hard resin such as polypropylene, and has a cylindrical body portion 21 whose upper side is opened, and a flange portion 22 is formed outward from the upper end of the body portion 21. A male screw portion 23 is threaded on the outer periphery of the barrel portion 21 from below the flange portion 22 to the middle of the barrel portion 21. In addition, a discharge port 24 is extended to the side of the bottom of the drainage device 2, and an elbow pipe 5 is connected to the discharge port 24. Further, the drainage device 2 has a crimping portion 25 that is crimped by a thin plate made of stainless steel.
Although the outer diameter of the trunk | drum 21 is smaller than the opening formed in the bottom face of the sink 1, the outer diameter of the flange part 22 is larger than the said opening. A female screw portion 31 of the nut 3 is screwed into the male screw portion 23 from the back side of the sink 1. Therefore, in a state where the drainage device 2 is attached to the sink 1, the back surface of the flange portion 22 abuts the opening periphery of the sink 1 via the water blocking member 4, and the opening periphery of the sink 1 is formed by the nut 3 and the flange portion 22. And the water stop member 4 is pinched.
The flange portion 22 has a tapered surface 26 formed on the lower surface side at the outer peripheral edge. The tapered surface 26 is inclined outward so that the upper surface side has a larger diameter than the lower surface side. Further, the inclined surface 7 is formed on the lower surface of the flange portion 22 from the lower end of the tapered surface 26 toward the inside. The inclined surface 7 is a means for restricting the falling direction of the convex portion 41a in the present embodiment, and is formed such that the falling direction of the convex portion 41a, that is, the inclined surface 7 faces the inner peripheral side. Therefore, the inclined surface 7 is formed so that the flange part 22 goes upward as it advances inward from the lower end of the taper surface 26.
The caulking portion 25 is formed by covering a thin plate from the inside of the drainage device 2 to the upper surface of the flange portion 22, the tapered surface 26 and the inclined surface 7. Here, a gap C is formed between the end portion of the caulking portion 25 and the resin portion (non-caulking portion) on the lower surface of the flange portion 22.
In the construction completion state, the convex portion 41a of the water stop member 4 is in contact with the inclined surface 7 (crimped portion 25), and the convex portion 41b is in contact with the resin portion (non-crimped portion) on the lower surface of the flange portion 22, 41a stops water outside the gap C.

  The water stop structure according to the second embodiment of the present invention is connected as follows.

First, in a state where the water blocking member 4 is disposed below the flange portion 22 of the drainage device 2, the drainage device 2 is inserted from above into the opening formed on the bottom surface of the sink 1. Next, the nut 3 is passed through the body portion 21 from the discharge port 24 side, the female screw portion 31 of the nut 3 is screwed into the male screw portion 23, and the nut 3 is attached to the back surface of the sink 1. At this time, the water stop member 4 is sandwiched between the lower surface of the flange portion 22 and the upper surface of the sink 1 from above and below. As shown in FIG. 4, the convex portion 41a of the convex portion 41 abuts on the inclined surface 7 that is the caulking portion 25 of the flange portion 22, and the convex portion 41b abuts on the hard resin portion that is a non-caulking portion.
When the screwing of the nut 3 and the drainage device 2 is advanced from the state where the water stop member 4 and the flange portion 22 are in contact with each other, the water stop member 4 is clamped by the flange portion 22 and the sink 1 and the convex portions 41a and 41 Water is stopped between the drainage device 2 and the sink 1 by applying pressure to the convex portion 41b from above and below. While the waterstop member 4 crushed by the clamping pressure is compressed in the vertical direction, a force works to spread outward in the radial direction, but the convex portion 41 is in contact with the flange portion 22 and the sink, Because it is provided with a means for restricting the falling direction, it tends to fall inward. That is, the flange portion 22 includes the inclined surface 7 on the lower surface, and converts a part of the downward stress applied to the convex portion 41a into a stress inward in the circumferential direction, which is the falling direction of the convex portion 41a. Therefore, when pinched by the flange part 22 and the sink 1, the falling direction of the convex part 41a is regulated inward. Accordingly, in the state where the drainage device 2 is connected to the sink 1, the water stop member 4 is not exposed from the outside of the flange portion 22.
Finally, the elbow pipe 5 and the drain trap 6 are connected to the discharge port 24, and the connection of the drain pipe is completed.

In the water stop structure of the present invention, since the convex portion 41a contacts the inclined surface 7 of the flange portion 22, the intrusion of drainage from the gap C between the caulking portion 25 and the non-caulking portion (hard resin portion) is prevented. Can do.
Further, the present invention is provided with the inclined surface 7 as a means for restricting the falling direction of the convex portion 41, and the convex portion 41 is restricted so as to fall inward when the drain pipe is connected. Therefore, it is possible to prevent the design from being deteriorated due to the protrusion 41 being exposed from the outside of the flange portion 22 by the protrusion 41 falling to the outside.

  In addition to the first embodiment and the second embodiment, the present invention can be modified as appropriate without departing from the scope of the claims.

  For example, in the first embodiment and the second embodiment, the inclined surface 43 and the inclined surface 7 are formed in a straight line shape, but the inclined surface 43 and the inclined surface 7 may be formed in a substantially arc shape in a sectional view. Any shape that can convert the direction of the pressure to the falling direction of the convex portion 41a when pressure is applied to the convex portion 41a may be used.

  Further, the groove portion 42 is formed to be concave in the vertical direction at the rising portion of the convex portion 41a. However, as in the third embodiment shown in FIG. 5, the groove portion 42 is formed to be concave toward the convex portion 41a. May be.

  Further, in the second embodiment, the flange portion 22 regulates the falling direction of the convex portion 41a by the inclined surface 43 formed on the lower surface. However, as in the fourth embodiment shown in FIG. The restricting means may be configured by a stepped portion 27 formed downward from the outer end. In the fourth embodiment, the convex portion 41a is disposed on the inner side of the stepped portion 27 and is in contact with the outer side of the convex portion 41a, so that the convex portion 41a can be prevented from falling down. . In addition, you may form the inclined surface 43 in 2nd embodiment, and the step part 27 in 4th embodiment not to the flange part 22 (drainage 2) which is the piping P but to the to-be-connected member S side.

  Further, as in the fifth embodiment shown in FIG. 7, the fall direction regulating means may be formed so that the convex portion 41 is inclined toward the fall direction.

  Further, the falling direction regulating means may be configured such that the falling direction side of the convex portion 41 is a low-rigidity portion, and when it is sandwiched between the pipe P and the connected member S, it falls to the low-rigidity side.

Although the embodiment of the present invention is as described above, in the present invention, since the convex portion is provided with the regulating means in the falling direction, the convex portion can be prevented from being exposed from the pipe or the like.
In addition, how the convex part falls in each embodiment is an example, and it changes with the shape of a water stop member, rigidity, the shape of members, a construction method, etc. Therefore, for example, as shown in FIG. 8, there is a case where the rising portion of the convex portion 41a once bends outward and then falls inward toward the tip portion. Further, as shown in FIG. When it is crushed, it may be deformed to prevent it from falling outside by deforming so that the rising portion of the convex portion 41a is thick in the left-right direction.

Further, the water stop structure of the present invention is not limited to the connection between the drainage device 2 and the sink 1 mentioned in the above embodiment, and may be used for connection between other pipes and connected members. is there.
Further, the means for restricting the direction in which the convex part falls is not limited to the means for always restricting the convex part to fall inward. According to the use etc. of piping to connect, the structure which controls so that a convex part may fall toward an outer side may be sufficient.

DESCRIPTION OF SYMBOLS 1 sink 11 depression part 2 drainage device 21 trunk | drum 22 flange part 23 male screw part 24 discharge port 25 crimping part 26 taper surface 27 step part 3 nut 31 female screw part 4 water stop member 41, 41a, 41b convex part 42 groove part 43 Inclined surface 5 Elbow pipe 6 Drain trap 7 Inclined surface P Piping S Connected member C Clearance

Claims (7)

A water stop structure used for connecting pipes,
A water-stopping member that is sandwiched between the pipe and the connected member to which the pipe is connected, and that stops water between the pipe and the connected member;
Convex portions formed on the water stop member and projecting toward the pipe or connected member;
A water stop structure comprising a restricting means for restricting the falling direction of the convex portion when the pipe is connected. The regulating means is
The water stop structure according to claim 1, comprising a groove formed in the water stop member along the convex portion on the collapse direction side of the convex portion. The regulating means is
The water stop structure according to claim 1, wherein the water stop structure is formed of an inclined surface that is formed on the convex portion and is inclined toward a falling direction. The regulating means is
The water stop structure according to claim 1, wherein the water stop structure is formed by an inclined surface that is formed in the pipe or the connected member and is inclined toward a falling direction of the convex portion. The regulating means is
The water stop structure according to claim 1, wherein the water stop structure is formed by a stepped portion formed toward the water stop member formed in the pipe or the connected member. The regulating means is
The water stop structure according to claim 1, wherein the convex portion is inclined toward the falling direction side. The regulating means is
The waterstop structure according to claim 1, wherein the convex portion falls on the side in the direction of collapse.

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