JP2018009312A - Weep hole device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate maintenance of a weep hole, and to enhance functionality of a check valve and the weep hole.SOLUTION: A holder 10 of a check valve device 3 is attached to a weep hole pipe 2. A valve body 30 is provided in the holder 10. The valve body 30 includes a valve seat member 31 having a valve seat 31a, and a valve element 32 opening and closing a valve passage 30c by being seated to and separated from the valve seat 31a. A direction of the valve body 30 is selected from a first direction and a second direction reverse to the first direction, so that the valve body 30 can be attached to the holder 10.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a weephole device that relieves water pressure applied to a civil engineering structure from a natural ground, and more particularly to a weephole device having a check valve function.

  It is known to provide a weep hole as a means for preventing excessive water pressure from the natural ground on a civil engineering structure such as a pipe wall that separates a defined space such as the inside of the pipe from the natural ground. The weep hole is required to have a water-stopping property from the painting space side to the natural mountain side while maintaining water permeability from the natural mountain side of the civil engineering structure to the painting space side.

  For example, in Patent Document 1, a weephole pipe is embedded in a natural ground, and an end portion of the weephole pipe passes through a retaining wall (civil engineering structure). A through hole is formed in the tube wall of the weephole tube. The natural water enters the weep hole through the through hole and is led out of the retaining wall (definition space). A check valve is provided inside the weephole tube. The check valve has a lid plate-like valve body. The valve body allows a flow from the natural ground side and prevents a reverse flow.

JP 2006-16862 A

When weep holes are used for a long period of time, the water passage in the flow permissible direction is reduced or the water stop in the flow prevention direction is reduced by clogging the moving part of the water flow part and the check valve. Or drop. For this reason, regular maintenance is required. However, conventional weep holes are difficult to remove and expensive to maintain.
In the weephole pipe of Patent Document 1, a check valve is provided on a removable inner pipe, and the check valve can be attached and detached together with the inner pipe. However, the check valve of Patent Document 1 is used only to release the water pressure on the natural ground side to the outside of the retaining wall. For example, it cannot be used as backflow prevention means during backfilling or cleaning, and its functionality is low.
The present invention has been made in view of the above circumstances, and an object thereof is to facilitate the maintenance of a weep hole and to enhance the functionality of a check valve.

In order to solve the above-mentioned problems, the present invention is a weephole device provided in a civil engineering structure that defines a defined space separated from a natural ground,
A weep hole pipe having a passage in the pipe constituting a weep hole and penetrating the civil engineering structure, and a check valve provided in the weep hole pipe, the check valve,
A holder attached to the weephole tube;
A valve body that is held in the holder in one direction selected from a first direction and a second direction that is reversed in the tube axis direction of the weephole tube with respect to the first direction. And
The valve main body includes a valve seat member having a valve seat, and a valve body that closes and opens the pipe passage by being seated on and away from the valve seat.

It is preferable that the valve body allows a flow from the natural ground side to the defined space side in the first direction and prevents a flow from the defined space side to the natural ground side. Normally, the valve body is installed in the first direction. The water pressure load on the civil engineering structure can be reduced by escaping the natural water from the weep hole through the check valve to the defining space. In addition, it is possible to prevent water leakage from the painting space to the natural ground.
Weep holes can be easily maintained by removing the check valve from the defining space.
By changing the direction of the check valve, the check valve can be used for cleaning, backfilling, etc., and the functionality of the check valve can be enhanced.

The holder includes an annular first holder member and an annular second holder member detachably fitted to the first holder member;
It is preferable that the valve body has a held portion that is held between the first holder member and the second holder member in both the first and second directions.
By separating the first holder member and the second holder member, the valve body can be removed from the holder. As a result, cleaning of the inside of the check valve and the inside of the weephole pipe, filter replacement, and the like can be easily performed. Alternatively, the orientation of the valve body can be changed and reattached to the holder. The valve body can be stably held by the holder in any state of the first direction and the second direction.

The valve seat member includes a shaft support portion, an annular portion surrounding the shaft support portion, and a connecting arm portion that extends in a radial direction of the annular portion and connects the annular portion and the shaft support portion,
Further, the valve body is an elastic member that urges the valve body toward the valve seat;
It is preferable to include a connecting shaft member that penetrates and connects the shaft support portion, the valve body, and the elastic member.
Thereby, the valve body can be unitized. The entire valve body can be attached to and detached from the holder as one unit, and the orientation of the valve body can be easily changed.

It is preferable that a through hole is formed in the tube wall of the weephole tube, and a filter is accommodated in the weephole tube.
The natural water can enter the weep hole through the through hole, and can flow through the check valve to the defining space. The filter can prevent sediment from flowing into the weep hole. When performance degradation occurs due to filter clogging, etc., performance can be recovered by removing the valve body and replacing or cleaning the filter.

  According to the present invention, weep hole maintenance can be facilitated and the functionality of the check valve can be enhanced.

FIG. 1 is a cross-sectional view of an underground pipe with a weephole device according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of a connection portion between the weephole device and the underground pipe. FIG. 3 is a bottom view of the check valve provided at the connecting portion along the line III-III in FIG. 2. FIG. 4 is a cross-sectional view of the connecting portion showing a state in which the inflow water from the natural ground is released. FIG. 5 is a side cross-sectional view showing the valve body of the check valve in a second direction. FIG. 6 is a cross-sectional view of the connection portion between the weephole device and the underground pipe according to the second embodiment of the present invention. FIG. 7 is a bottom view of the check valve according to the second embodiment, taken along line VII-VII in FIG. FIG. 8 is a cross-sectional view of the connection portion showing a state in which inflow water from the natural ground is released in the second embodiment. FIG. 9 is a side cross-sectional view showing the valve body of the check valve of the second embodiment in a second direction.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
FIG. 1 shows an underground pipe 9 (civil engineering structure) constructed in the natural ground B. The underground pipe 9 may be a water supply pipe, a sewer pipe, or an agricultural water pipe. An underground conduit 9 b (defining space) is defined inside the underground tube 9. The pipe wall 9a of the underground pipe 9 separates the outer ground mountain B and the inner underground pipe line 9b. A through hole 9c is formed in the tube wall 9a.
In FIG. 1, the thickness of the tube wall 9 a is exaggerated with respect to the diameter of the underground tube 9.

The weephole device 1 is connected to the pipe wall 9a of the underground pipe 9. The weep hall device 1 includes a weep hole pipe 2 and a check valve 3. The material of the weephole tube 2 is a resin such as polyvinyl chloride (PVC), but may be a metal such as stainless steel.
The axis L ₂ of the weephole tube ₂ is orthogonal to the tube axis L ₉ of the underground tube 9. The connection end 2d of the weephole tube 2 with the underground tube 2 passes through the tube wall 9a by passing through the through hole 9c and faces the underground conduit 9b. The portion of the weephole tube 2 opposite to the connection end 2d extends to the outside of the tube wall 9a and is buried in the natural ground B. The in-pipe passage 2b of the weephole pipe 2 is a weephole.
The length and diameter of the weephole tube 2 are preferably set as appropriate according to the thickness of the tube wall 9a, the assumed water pressure at the installation location, and the like.

  A plurality of through holes 2 c are formed in the tube wall 2 a of the weep hole tube 2. These through holes 2c are arranged in a distributed manner in the tube axis direction of the tube wall 2a. Each through hole 2c penetrates from the outer peripheral surface of the tube wall 2a to the inner peripheral surface.

  A lid 4 is provided at the natural mountain side end 2 e of the weephole tube 2. The natural mountain side end 2 e is closed by the lid 4. A through hole 4 c is formed in the lid 4. The through hole 4c penetrates from the outer surface of the lid 4 to the inner surface (the surface facing the in-pipe passage 2b).

  A filter 5 is accommodated inside the weephole tube 2. The filter 5 is composed of a water-permeable sheet or the like, and captures earth and sand while allowing water to pass through.

A check valve 3 is provided at the connection end 2 d of the weephole pipe 2. As shown in FIGS. 2 and 3, the check valve device 3 includes a holder 10 and a valve body 30 and has a substantially cylindrical shape. As shown in FIG. 1, the axis L ₃ of the check valve device 3 is along the axis L ₂ of the weephole pipe 2 and is orthogonal to the pipe axis L ₉ of the underground pipe 9.

  As shown in FIGS. 2 and 3, the holder 10 includes a first holder member 11 and a second holder member 12. The material of the first holder member 11 and the second holder member 12 is made of a resin such as polyvinyl chloride (PVC), for example.

The first holder member 11 has an annular shape that is coaxial with the axis L ₃ of the check valve device 3. A male screw portion 11 b is formed on the outer peripheral surface of the first holder member 11. As shown in FIG. 2, a flange 11 f is formed on the outer periphery of the end portion of the first holder member 11 on the underground conduit 9 b side (lower side in FIG. 2). A flange 11f is fixed to the connection end 2d of the weep hole tube 2 with screws (not shown) or the like. A female screw portion 11 c is formed on a portion of the inner peripheral surface of the first holder member 11 on the underground conduit 9 b side.

A second holder member 12 is disposed inside the first holder member 11. The second holder member 12 has an annular shape that is shorter than the first holder member 11 and coaxial with the first holder member 11. The second holder member 12 integrally includes a cylindrical tube portion 12a and a cap plate portion 12e that closes an end portion of the tube portion 12a on the underground conduit 9b side. A male screw portion 12 c is formed on the outer periphery of the second holder member 12. By the male screw portion 12c is screwed into a female threaded portion 11c, the second holder 12 are movable forward and backward and detachably fitted along the axis L ₃ relative to the first holder member 11.

  A circular opening 12h is formed at the center of the cap plate portion 12e. The inner chamber 10c is connected to the outside on the underground conduit 9b side (lower side in FIG. 2) through the opening 12h. A hexagonal recess 12f is formed at the end of the opening 12h on the underground conduit 9b side. The second holder member 12 can be easily attached and detached by fitting and turning a tool such as a hexagon wrench in the hexagonal recess 12f.

  The first holder member 11 protrudes to the ground B side (upper side in FIG. 2) than the second holder member 12. An inner chamber 10 c of the holder 10 is configured by the inside of the portion of the first holder member 11 closer to the ground mountain B than the second holder member 12 and the inside of the second holder member 12. The inner chamber 10c penetrates the holder 10 from the ground B side (upper side in FIG. 2) to the underground conduit 9b side (lower side in FIG. 2).

The valve main body 30 is accommodated in the inner chamber 10c. The valve body 30 includes a valve seat member 31, a valve body 32, an elastic member 33, and a connecting shaft member 35.
The material of the valve seat member 31 is made of a resin such as PVC, for example. The valve seat member 31 integrally includes an annular portion 31x (held portion), one or a plurality of (here, four) connecting arm portions 31b, and a shaft support portion 31c. Annular portion 31x has become the axis L ₃ and the coaxial cylindrical.

  As shown in FIG.2 and FIG.3, the cyclic | annular axial support part 31c is arrange | positioned in the center part of the cyclic | annular part 31x. Four connecting arm portions 31b are provided at intervals of 90 degrees between the annular portion 31x and the shaft support portion 31c. Each connecting arm portion 31b extends in the radial direction of the annular portion 31x. The annular portion 31x and the shaft support portion 31c are connected by the connecting arm portion 31b. The four connecting arm portions 31b are radiating around the shaft support portion 31c. A fan-shaped valve passage 30c is formed between the adjacent connecting arm portions 31b and 31b. The valve passage 30c is interposed in an intermediate portion of the inner chamber 10c of the holder 10 and communicates with the inner chamber 10c.

The valve seat member 31 and thus the valve body 30 are held by the holder 10 as follows.
An inner flange 11g is formed at the end of the first holder member 11 of the holder 10 on the ground mountain B side (upper side in FIG. 2) so as to protrude radially inward. The annular portion 31x is sandwiched and held between the inner flange 11g and the end surface 12d of the second holder member 12 on the ground mountain B side. The inner flange 11g and the end face 12d constitute a valve body holding portion 10d. The valve main body holding portion 10 d has an annular shape over the entire circumference of the holder 10.

  When the second holder member 12 is separated from the first holder member 11, the holding state of the valve main body 30 is released. Therefore, the valve main body 30 can be attached to and detached from the holder 10.

Furthermore, the valve body 30 can be mounted on the holder 10 in one direction selected from the first direction shown in FIG. 2 and the second direction shown in FIG. 5. The valve body 30 in the second direction (FIG. 5) is inverted 180 degrees in the direction along the axes L ₂ and L ₃ with respect to the first direction (FIG. 2). In short, the portion that was facing the natural ground B side (upper side in FIG. 2) in the first direction is directed to the underground conduit 9b side in the second direction, and is underground in the first direction. The portion facing the pipe line 9b is directed to the natural ground B side (upper side in FIG. 5) in the second direction. As shown in FIGS. 2 and 5, the annular portion 31x (held portion) is sandwiched between the inner flange 11g and the end surface 12d when the valve body 30 is in either the first or second orientation. Thus, the valve body 30 is held by the valve body holding portion 10d.
The normal check valve 3 of the underground pipe 9 is oriented in the first direction (FIG. 2). Hereinafter, the check valve device 3 is assumed to be in the first direction (FIG. 2) unless otherwise specified.

As shown in FIG. 2, the valve body 32 is disposed on the underground conduit 9 b side (lower side in FIG. 2) of the valve seat member 31. The valve body 32 has a circular flat plate shape. As shown in FIG. 3, the outer diameter of the valve body 32 is slightly larger than the inner diameter of the annular portion 31x. A valve seat 31a is formed on the inner peripheral side of the annular portion 31x. The valve seat 31a has an annular shape having a difference width between the outer diameter of the valve body 32 and the inner diameter of the annular portion 31x.
The material of the valve body 32 is a resin such as PVC, for example. The material of the valve body 32 is not limited to resin, and may be hard rubber or the like.

The valve body 32 is adapted to be relatively moved along the axial line L ₃ between the seating position relative to the valve seat member 31 (FIG. 2) and the separating position (FIG. 4). As shown in FIG. 2, at the seating position, the peripheral edge of the valve body 32 is seated on the valve seat 31a. As a result, the valve passage 30c is closed. As shown in FIG. 4, the valve body 32 is separated from the valve seat 31 a at the separation position. Thereby, the valve passage 30c is opened.

As shown in FIG. 2, an elastic member 33 (biasing means) is disposed on the opposite side (upper side in FIG. 2) from the valve body 32 with the shaft support 31c interposed therebetween. The material of the elastic member 33 is composed of rubber (elastic body) softer than the valve body 32. Resilient member 33 is a conical tubular shape reduced in diameter as the distance along the cylindrical or valve seat member 31 in the axial line L _3.

As shown in FIG. 2, a connecting shaft member 35 is disposed on the axis L ₃ of the check valve 3. The connecting shaft member 35 is constituted by a bolt. The connecting shaft member 35 connects the members 31, 32, and 33 by passing through the elastic member 33, the shaft support portion 31 c, and the valve body 32. Connection shaft member 35 is adapted to be displaced in the axial L ₃ relative to the valve seat member 31 (FIG. 2, FIG. 4).

The head (upper end in FIG. 2) of the connecting shaft member 35 is pressed against the elastic member 33. Further, a nut 36 is provided at the distal end portion (the lower end portion in FIG. 2) of the connecting shaft member 35. A nut 36 is pressed against the valve body 32. By tightening the nut 36, the elastic member 33 is compressed and biases the connecting shaft member 35 toward the natural ground B side (upper side in FIG. 2). As a result, during normal times, the valve body 32 is seated and the valve passage 30c is closed.
In addition, the valve body 32 at the time of seating is also pressed against the surface (the lower surface in FIG. 2) which is flush with the valve seat 31a in the connecting arm portion 31b and the shaft support portion 31c.

  In the underground pipe 9, the water pressure in the underground pipe line 9 b acts on the valve body 32 through the opening 12 h of the check valve 3. Since the water pressure acts in the seating direction (upward in FIG. 2) with respect to the valve body 32, the valve body 32 is not opened. Thereby, it is possible to prevent the water in the underground conduit 9 b from flowing out to the natural ground B through the weephole device 1.

On the other hand, as shown in FIG. 4, the water Wa of the natural ground B can flow into the in-pipe passage 2 b through the through holes 2 c and 4 c of the weep hole pipe 2. The water pressure of the inflow water Wa acts on the valve body 32 in the seating direction (downward in FIG. 4). When this water pressure becomes a predetermined value or more, the valve body 32 is separated from the spring force of the elastic member 33. Thereby, the inflow water Wa can be discharged into the underground conduit 9b. As a result, the underground pipe 9 can be prevented from being damaged by excessive water pressure.
When the inflow water Wa from the natural ground B contains solids such as earth and sand, these solids can be captured by the filter 5. Thereby, it can prevent or suppress that the said solid substance is mixed in the water of the underground conduit 9b.

It is preferable to perform maintenance on the weep hall apparatus 1 regularly or irregularly. In maintenance, the second holder member 12 is removed by fitting and turning a tool such as a hexagon wrench into the hexagonal recess 12f from the underground conduit 9b side. Thereby, the valve body 30 can be easily detached from the holder 10. Then, the inside of the holder 10 and the valve body 30 can be cleaned. Furthermore, the filter 5 can be replaced or the inside of the pipe passage 2b can be cleaned. Thereafter, the valve body 30 is mounted in the holder 10 and the second holder member 12 is fitted. By such maintenance, the water permeability from the ground pile B side of the weephole device 1 to the underground conduit 9b side is recovered, and the water stoppage from the underground conduit 9b side to the natural mountain B side is recovered. Can do. Since maintenance work is easy, maintenance costs can be reduced.
The weephole device 1 has a small number of parts, a relatively simple structure, and can reduce the product cost.

  As shown in FIG. 5, by setting the valve body 30 in the second direction, the check valve 3 can be used as backflow prevention means or the like during backfilling or cleaning. Thereby, the functionality of the check valve 3 can be enhanced.

In the second orientation, the orientation with respect to the holder 10 of the valve body 30 is inverted 180 degrees in a direction along the axis L ₃ relative to the first orientation. Therefore, the seating direction and the seating direction of the valve body 32 are opposite to the first direction (FIG. 2), and the flow allowable direction and the flow blocking direction by the check valve 3 are the first direction (FIG. 2). Is reversed.

The members 31 to 33 of the valve body 30 are connected by the connecting shaft member 35, whereby the valve body 30 can be unitized. Therefore, the entire valve body 30 can be attached to and detached from the holder 10 as one unit, and the orientation of the valve body 30 can be easily changed.
The elastic member 33 made of rubber can be replaced with one having an appropriate hardness and dimensions so as to obtain an optimal biasing force in accordance with the viscosity and assumed pressure of the target fluid. Moreover, it can be easily replaced by removing the nut 36.
Further, according to the viscosity of the target fluid, the cross-sectional shape of the valve body 31 or the valve seat 31a of the valve seat member 31 can be changed to an appropriate one by changing the design. The replacement work of the valve body 32 can be easily performed by removing the nut 36. The replacement work of the valve seat member 31 can be easily performed by removing the second holder member 12.

Next, another embodiment of the present invention will be described. In the following embodiments, the same elements as those described above are denoted by the same reference numerals in the drawings, and the description is simplified.
[Second Embodiment]
6 to 9 show a second embodiment of the present invention. As shown in FIG. 6, in the weep hole device 1B of the second embodiment, the valve seat member 31 of the check valve 3B has a cylindrical portion 31d (annular portion). A flange 31f (held portion) is formed on the outer periphery of the cylindrical portion 31d. The flange 31 f (held portion) is held by the valve body holding portion 10 d of the holder 10, and as a result, the valve body 30 is held by the holder 10. As shown in FIGS. 6 and 9, the valve body 30 is detachable from the housing 10 and one of the first orientation (FIG. 6) and the second orientation (FIG. 9) is selected. It is the same as in the first embodiment in that it can be attached to the housing 10 by being oriented.
Hereinafter, also in the second embodiment, it is assumed that the valve body 30 is in the first direction (FIG. 6) unless otherwise specified. In other words, the check valve 3B is directed to allow the flow from the natural ground B side to the underground conduit 9b side and to prevent the flow from the underground conduit 9b side to the natural mountain B side. Shall.

As shown in FIG. 6, the annular surface (the lower surface in FIG. 8) facing the valve body 32 in the cylindrical portion 31d is a valve seat 31a. The valve seat 31a has a partially concave spherical shape.
As shown in FIG. 7, three connecting arm portions 31b of the check valve 3B are provided radially at intervals of 120 degrees. The cylinder portion 31d and the shaft support portion 31c are connected by the connecting arm portion 31b. As shown in FIG. 8, the surfaces of the connecting arm portion 31b and the shaft support portion 31c facing the valve body 32 (the lower surface in FIG. 8) have a partially concave spherical shape that is continuous with the valve seat 31a.

On the axis _{L 3} includes, in order from the natural ground B side (upper side in FIG. 6), the shaft support 31c of the valve seat member 31, the valve body 32, the elastic member 33, a spacer 37, antifouling mesh 38, washers 39, and nuts 36 is arranged. By connecting these members 31, 32, 33, 37, 38, 39, and 36 by a connecting shaft member 35, the valve body 30 is unitized. In the first direction, the head of the connecting shaft member 35 (bolt) is directed to the ground pile B side (upper side in FIG. 6), and the nut 36 is directed to the underground conduit 9b side (lower side in FIG. 6). It has been.

  As shown in FIG. 6, the valve body 32 has a partial spherical shell shape. An elastic member 33 (biasing means) is disposed on the inner peripheral portion (lower side portion in FIG. 6) of the valve body 32. The elastic member 33 is made of spherical rubber. The elastic member 33 is sandwiched between the valve body 32 and the spacer 37. The spacer 37 is made of a resin such as an elastomer, for example.

An antifouling mesh 38 is provided on the underground conduit 9b side (lower side in FIG. 6) from the valve body 32 and the elastic member 33. The antifouling mesh 38 is circular. An opening to the underground conduit 9b of the inner chamber 10c is covered with an antifouling mesh 38. The outer peripheral edge of the antifouling mesh 38 is a free end. The central portion of the antifouling mesh 38 is sandwiched between the spacer 37 and the washer 39. The washer 39 is made of a resin such as an elastomer. The washer 39 is interposed between the antifouling mesh 38 and the nut 36 at the distal end portion (lower end portion in FIG. 6) of the connecting shaft member 35.
In FIG. 7, the antifouling mesh 38 is not shown.

  The elastic member 33 is compressed and pressed against the valve body 32 by screwing the nut 36. As a result, as shown in FIG. 6, the valve passage 30c is closed by the valve body 32 being seated on the valve seat 31a in a normal state. Therefore, similarly to the first embodiment, it is possible to prevent the water in the underground conduit 9b from flowing out from the in-pipe passage 2b to the natural mountain B.

As shown in FIG. 8, when the water pressure of the inflowing water Wa such as the groundwater that has flowed into the pipe passage 2 b from the natural ground B exceeds a predetermined level, the valve body 32 is separated from the spring force of the elastic member 33. Is opened. Therefore, as in the first embodiment, the water pressure in the natural ground B can be released to the underground conduit 9b.
When solids such as earth and sand are mixed in the inflowing water Wa, in addition to being able to capture the solids by the filter 5, the solids that have passed through the filter 5 can be captured by the antifouling mesh 38. Thereby, it can prevent reliably that a solid substance mixes in the underground conduit 9b.

Also in the weep hole device 1B of the second embodiment, the valve body 30 can be easily detached from the holder 10 by removing the second holder member 12 during maintenance, and the holder 10 and the pipe passage 2b can be cleaned and filtered. 5 can be exchanged easily.
Furthermore, as shown in FIG. 9, in the check valve 3B, by the second orientation is inverted 180 degrees in the direction along the valve body 30 in the axis L _3, for example, back-filling and cleaning when the check ring It can be used as a means. In the second direction, the antifouling mesh 38, the spacer 37, and the washer 39 are removed, and the washer 34 is attached instead. However, the antifouling mesh 38 and the like are attached as in the first direction. May be.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the civil engineering structure is not limited to the underground pipe 9 and may be a retaining wall or the like as long as it defines an defining space separated from the natural ground B.
The valve body 32 is fixed to the shaft support portion 31c at the center, can be elastically deformed so that the peripheral edge is separated from the valve seat 31a by the elasticity of the valve body 32 itself, and can be seated on the valve seat 31a after being elastically restored. There may be. In that case, the elastic member 33 may be omitted.

  The present invention is applicable to, for example, a weep hall device with a check valve in a sewer pipe, an agricultural water pipe, or the like.

B Ground mountain L ₂ axis 1, 1B Weep hole device 2 Weep hole pipe 2b Pipe passage (Weep hole)
2c Through-hole 4c Through-hole 5 Filter 3, 3B Check valve 9 Underground pipe (civil engineering structure)
9b Underground pipeline (defining space)
DESCRIPTION OF SYMBOLS 10 Holder 10d Valve main body holding part 11 1st holder member 12 2nd holder member 30 Valve main body 31 Valve seat member 31x Annular part (held part)
31a Valve seat 31b Connecting arm portion 31c Shaft support portion 31d Tube portion (annular portion)
31f Flange (held part)
32 Valve body 35 Connecting shaft member

Claims (4)

A weephole device provided in a civil engineering structure that defines an image space separated from a natural ground,
A weep hole pipe having a passage in the pipe constituting a weep hole and penetrating the civil engineering structure, and a check valve provided in the weep hole pipe, the check valve,
A holder attached to the weephole tube;
A valve body that is held in the holder in one direction selected from a first direction and a second direction that is reversed in the tube axis direction of the weephole tube with respect to the first direction. And
The weep hole device, wherein the valve body includes a valve seat member having a valve seat, and a valve body that closes and opens the pipe passage by being seated on and off the valve seat. The holder includes an annular first holder member and an annular second holder member detachably fitted to the first holder member;
The valve body has a held portion that is held between the first holder member and the second holder member in both the first and second directions. The weephole device according to claim 1. The valve seat member includes a shaft support portion, an annular portion surrounding the shaft support portion, and a connecting arm portion that extends in a radial direction of the annular portion and connects the annular portion and the shaft support portion,
Further, the valve body is an elastic member that urges the valve body toward the valve seat;
The weep hole device according to claim 1, further comprising a connecting shaft member that penetrates and connects the shaft support portion, the valve body, and the elastic member.   The weep hole device according to any one of claims 1 to 3, wherein a through hole is formed in a tube wall of the weep hole tube, and a filter is accommodated inside the weep hole tube. .

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