JP7056817B2 - Drainage piping structure - Google Patents

Description

The present invention relates to a drainage pipe structure.

As a general drainage pipe structure, a pipe for flowing drainage discharged from a sink, which is a water supply device, and a pipe for flowing drainage discharged from a dishwasher are connected to a merging pipe arranged on a slab, and drainage is performed from the merging pipe. There is a drainage pipe structure in which drainage flows through one pipe toward the downstream side in the direction (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2011-169081

However, in the conventional drainage pipe structure, since the merging pipe is arranged on the slab, a hole for penetrating the drainage pipe connected to the sink and a drainage pipe connected to the dishwasher are provided. Holes for penetrating had to be formed on the floor as an example of the plate material, and the work of constructing the holes for piping became complicated. Also, as the number of water fixtures increases, so does the number of holes formed in the floor.

In consideration of the above facts, an object of the present invention is to provide a drainage pipe structure capable of minimizing holes for pipes formed in a plate material.

In the drainage piping structure according to the first aspect , a plurality of water-related appliances arranged above the plate material arranged in the horizontal direction and draining the drainage, and drainage from the plurality of water-related appliances are merged above the plate material. It has a merging member, which is to be discharged from a single discharge unit.

In the drainage pipe structure according to the first aspect , the drainage discharged from each water circulation device passes through the merging member and is discharged from a single discharge portion of the merging member. Therefore, the drainage discharged from the merging member can be discharged to the downstream side with one pipe. It is sufficient to form one hole in the plate material in order to pass one pipe, and the work of forming a hole in the plate material can be reduced.

If the merging part is provided below the plate material, pipes for discharging the drainage from the water-related equipment to the merging part are required for the number of water-related equipment, and the plate material is to pass the pipe. Holes are required for the number of pipes, and multiple holes are required.

According to the second aspect , in the drainage pipe structure according to the first aspect , a vertical portion extending in the vertical direction and a vertical portion extending in the vertical direction are provided horizontally on the downstream side in the drainage direction of the merging member. An L-shaped pipe having a horizontal portion extending in the direction is provided, and a pipe extending in the lateral direction is provided on the downstream side of the horizontal portion in the drainage direction.

In the drainage pipe structure described in the second aspect , the L-shaped pipe provided on the downstream side in the drainage direction of the merging member is rotated around the axis of the vertical portion to orient the horizontal portion in the horizontal direction and the drainage direction of the horizontal portion. The direction of the piping provided on the downstream side can be set freely. In other words, the direction of the pipe extending in the lateral direction can be freely set regardless of the arrangement of the plurality of water supply devices.

According to the third aspect , in the drainage pipe structure, a first water circulation device arranged above the plate material arranged in the horizontal direction to discharge the drainage and a first water circulation device arranged above the plate material to discharge the drainage. The second water supply device, the first inflow section for flowing the drainage from the first water supply device, the second inflow section for flowing the drainage from the second water supply device, and the first water. A confluence portion where the drainage from the revolving equipment and the drainage from the second water recirculation equipment are merged above the plate material, and a confluence portion provided on the downstream side in the drainage direction of the confluence portion from the first water recirculation equipment. It has a merging member provided with a drainage portion for draining the drainage and the drainage from the second water supply device.

In the drainage piping structure according to the third aspect , the drainage discharged from the first water supply device and the drainage discharged from the second water supply device are provided with a confluence portion where the drainage is merged above the plate material. It passes through the merging member and is discharged from a single discharge of the merging member. Therefore, the drainage discharged from the merging member can be discharged to the downstream side with one pipe. It is sufficient to form one hole in the plate material in order to pass one pipe, and the work of forming a hole in the plate material can be reduced.

In the invention described in the fourth aspect , in the drainage pipe structure according to the third aspect , a drain trap is provided between the first water circulation device and the merging member.

In the drainage pipe structure according to the fourth aspect , the drain trap provided between the first water supply device and the merging member causes the air in the downstream pipe to run up to the first water supply device side. Therefore, it is possible to prevent the water from being discharged from the first water supply device.

In the invention described in the fifth aspect , in the drainage pipe structure according to the fourth aspect , the pipe volume between the drain trap and the merging member is set between the second water circulation device and the merging member. It is set to be larger than the piping volume.

When the drainage is discharged from the second water supply device, the air between the second water supply device and the confluence is pushed and the pressure in the pipe rises until the drainage reaches the confluence. .. This pressure acts not only on the downstream side of the drainage of the merging part through the merging part but also on the drainage trap side from the merging part. Therefore, if the pressure acting on the drain trap side is large, the drain trap may be broken and the air in the drain pipe may be discharged to the first water-related device side.

Here, if the pipe volume from the merging member to the drain trap is increased, the pressure increase from the downstream side can be buffered at the portion where the pipe volume is increased, and the pressure increase acting on the water sealing of the drain trap is suppressed. It is possible to suppress the rupture of the drain trap. In the drainage pipe structure described in the fifth aspect , the pipe volume from the merging member to the drain trap is set to 1.0 times or more the pipe volume from the merging member to the second water supply device, so that the drain trap It is possible to secure a sufficient piping capacity between the merging member and the drain trap to prevent the rupture of the pipe.

Here, if the piping volume from the merging member to the drain trap is less than 1.0 times or more than the piping volume from the merging member to the second water supply device, it becomes difficult to suppress the rupture of the drain trap. Become.

In order to suppress the breakage of the drain trap, it is sufficient that the piping volume from the merging member to the drain trap is 1.0 times the piping volume from the merging member to the second water supply device. Therefore, if the piping volume from the merging member to the drain trap exceeds 2.0 times the piping volume from the merging member to the drainage of the second water supply device, the piping length from the merging member to the drain trap becomes longer than necessary. As a result, the piping members are wasted, and for example, it becomes difficult to fit the piping under the water supply equipment.

The invention described in the sixth aspect is in the drainage pipe structure according to the fourth aspect , between the second water circulation device and the merging member, and between the second water circling device and the merging member. A bag body is provided that receives the pressure of the air in the flow path in the lower part from the inside of the lower part and expands or contracts.

When drainage is suddenly discharged from the second water supply device, the pressure in the pipe on the downstream side of the drainage direction of the second water supply device suddenly rises, and the pressure is applied to the drain trap via the merging member. It is assumed that the sealed water that has been transmitted and stored in the drain trap flows back to the first water circulation device side, and the drain trap is broken.

However, in the drainage piping structure according to the sixth aspect , since the bag body is provided between the second water supply device and the merging member, when the drainage is suddenly discharged from the second water supply device. The pressure rise is suppressed by the expansion of the bag body. That is, the increase in the pressure acting on the drain trap is suppressed, and the breakage of the drain trap can be suppressed.

The invention described in the seventh aspect is the first aspect of the drainage pipe structure according to any one of the third to sixth aspects , wherein the merging member is provided with drainage from the upstream side in the drainage direction on the upper side. A first pipe portion that flows in from the inflow portion of the water and discharges toward the lower end portion, and one end portion is connected to the first pipe portion and drainage from the second water circulation device is discharged to the other end portion. It has a second pipe portion to flow in from the second inflow portion provided on the side, and the axis of the end portion of the second pipe portion on the downstream side in the drainage direction is the axis of the first pipe portion. On the other hand, it is directed diagonally downward.

In the drainage pipe structure according to the seventh aspect , the axis of the end of the second pipe portion on the downstream side in the drainage direction is directed diagonally downward with respect to the axis of the first pipe portion. Therefore, inside the merging member, the air and drainage flowing into the first pipe portion from the second water circulation device side are discharged diagonally downward with respect to the flow path of the first pipe portion. Therefore, the air and the drainage easily flow to the downstream side in the drainage direction, and it becomes difficult to apply pressure (positive pressure) to the drainage trap side. As a result, it is possible to prevent the drain trap from being broken.

In the drainage pipe structure according to any one of the third to seventh aspects , the invention described in the eighth aspect has a vertical portion extending in the vertical direction and a vertical portion on the downstream side in the drainage direction of the merging member. An L-shaped pipe provided on the downstream side in the drainage direction and having a horizontal portion extending in the horizontal direction is provided, and a pipe extending in the lateral direction is provided on the downstream side in the drainage direction of the horizontal portion.

In the drainage pipe structure according to the eighth aspect , the L-shaped pipe provided on the downstream side in the drainage direction of the merging member is rotated around the axis of the vertical portion to orient the horizontal portion in the horizontal direction and the drainage direction of the horizontal portion. The direction of the piping provided on the downstream side can be set freely. In other words, the direction of the pipe extending in the lateral direction can be freely set regardless of the arrangement of the plurality of water supply devices.

As described above, according to the drainage pipe structure of the present invention, there is an excellent effect that the number of holes for pipes formed in the plate material can be minimized.

It is a side view which shows the drainage pipe structure which concerns on 1st Embodiment of this invention. (A) is a side view of the S-shaped trap, (B) is a cross-sectional view perpendicular to the axis showing the first bent portion, and (C) is a cross-sectional view perpendicular to the axis showing the second bent portion. .. (A) is a perspective view showing a part of the pressure relaxing device and the pipe joint as a cross section, and (B) is a horizontal sectional view of the pressure relaxing device (3B-3B line cross section of FIG. 3A). Figure). It is a perspective view which shows the bag body. (A) is a perspective view looking up from diagonally below showing the combined pipe, and (B) is a side view showing the combined pipe. It is a side view which shows the drainage pipe structure which concerns on a comparative example. It is a side view which shows the drainage pipe structure which concerns on other comparative examples. It is a side view which shows the drainage pipe structure which concerns on 2nd Embodiment. It is a perspective view which made a part which shows the pressure relaxation device and a pipe joint. It is a side view which shows the drainage pipe structure which concerns on 3rd Embodiment.

[First Embodiment]
The drainage pipe structure 10 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 5.
A so-called siphon drainage system is used in the drainage pipe structure 10 according to the present embodiment. As shown in FIG. 1, a drainage joint 18 for flowing drainage from a water supply device (sink 22, dishwasher 26), which will be described later, is provided in the drainage stand pipe 16 that penetrates the through hole 14 of the floor slab 12 of the building. It is provided so as to combine the drainage from the upper drainage stand 16 and the drainage from the water supply device.

On each floor, the floor 20 as an example of the plate material is arranged on the upper side of the floor slab 12 at intervals. On the floor 20, a sink 24 for a kitchen equipped with a sink 22 as an example of a first water-related device and a dishwasher 26 as an example of a second water-related device are installed. ..

(Drainage port member)
The bottom portion 22A of the sink 22 is provided with a drainage port member 28 through which drainage flows. When the drainage port member 28 is used in a general household, it is preferable to secure a volume of about 2500 ml (milliliter) to 3000 ml. A tubular outlet 28C is formed on the bottom surface side of the drainage port member 28.

A water-sealed S-shaped trap 40 as an example of a drainage trap is connected to the outlet 28C of the drainage port member 28 via an L-shaped elbow 38. The elbow 38 and the S-shaped trap 40 are connected by using a nut 41. In other words, an S-shaped trap 40 is provided between the sink 22 and the confluence pipe 80 described later.

(S-shaped trap)
As shown in FIG. 2A, the S-shaped trap 40 has a U-shaped first bent portion 40A and an inverted U-shaped portion formed on the downstream side of the first bent portion 40A in the drainage direction. It is provided with a second bent portion 40B.

As shown in FIG. 2B, the cross-sectional shape of the first bent portion 40A is circular. On the other hand, the cross-sectional shape of the second bent portion 40B is a shape having a short axis and a long axis, for example, an elliptical shape as shown in FIG. 2C. The flow path cross-sectional area (cross-sectional area inside the pipe) A of the first bent portion 40A and the flow path cross-sectional area (cross-sectional area inside the pipe) B of the second bent portion 40B are the same. A part of the drainage is stored as the sealing water W in the S-shaped trap 40.

As shown in FIG. 2A, a tubular cleaning port 42 is provided at the lower end of the first bent portion 40A. A male screw portion (not shown) is formed on the outer periphery of the cleaning port 42. The cover 44 is attached to the cleaning port 42 by screwing the female threaded portion (not shown) of the cover 44 into the male threaded portion.

In the S-shaped trap 40 of the present embodiment, in the portion where the cross-sectional shape changes from circular to elliptical (near the left side of the drawing at the lower end of the first bent portion 40A), a step is generated due to the shape change, so that the cross-sectional shape remains circular. Compared to the case of, foreign matter in the drainage is more likely to be caught in the stepped portion (it is intentionally made easier to be caught). Since the step portion is located near the cleaning port 42, foreign matter caught on the step portion can be easily removed from the cleaning port 42. If a foreign substance is caught on the downstream side of the S-shaped trap 40, for example, in the piping under the floor, the floor 20 must be peeled off to take out the work, which complicates the work, but it is provided on the floor 20. By hooking the foreign matter on the step portion of the S-shaped trap 40 and making it possible to catch the foreign matter, the work of removing the foreign matter becomes easy.

Further, a vent valve mounting portion 46 opened upward is provided at the upper end of the second bent portion 40B, and the vent valve 48 is attached to the vent valve mounting portion 46. The vent valve 48 is a component for allowing air from the outside to pass through the S-shaped trap 40 and preventing drainage and air from passing through the S-shaped trap 40 to the outside.

(Piping joints, pressure relaxation devices)
As shown in FIG. 1, a pipe joint 50 is provided on the downstream side of the S-shaped trap 40 in the drainage direction. The pipe joint 50 is a member that connects the pressure relaxation device 64 to the S-shaped trap 40.
As shown in FIGS. 1 and 3, the pipe joint 50 includes a main pipe portion 52 extending along the vertical direction and a branch pipe portion 54 inclined with respect to the vertical direction, and is formed in a substantially Y shape. ing.

A large diameter portion 52A having a larger diameter than the general portion is formed in the lower portion of the main pipe portion 52, and a straight portion 80A of the downstream side merging pipe 80 described later is inserted into the large diameter portion 52A, and the large diameter portion is formed. A nut 58 (see FIG. 1) is screwed into a male screw portion 56 formed on the outer peripheral surface of the 52A so that it can be connected to the merging pipe 80.

The upper portion of the main portion 52 is connected to the second bent portion 40B of the S-shaped trap 40 by using a nut 62 (see FIG. 1).

As shown in FIG. 3A, a pressure relaxation device 64 is provided at the upper end of the branch pipe portion 54 in the pipe joint 50. The pressure relaxation device 64 is a component for relaxing the pressure acting on the S-shaped trap 40.

As shown in FIGS. 3A and 3B, the pressure relief device 64 includes a bag body 66 communicating with the branch pipe portion 54 of the pipe joint 50 and a cup-shaped cover 68 covering the bag body 66. It is equipped with.

The bag 66 is made of an elastic material such as rubber, and is formed in a tubular shape with one end closed and the lower open as shown in FIGS. 3 and 4. As shown in FIG. 3B, the bag body 66 is formed in a shape extending outward from the central portion in a plan view. The bag body 66 can be elastically expanded and contracted in the lateral direction (outside the radial direction of the cover 68), and when a positive pressure is received from the downstream side, the bag body 66 elastically deforms and swells in the lateral direction, and the pressure generated on the downstream side. Is configured to be mitigated. In other words, a bag body 66 is provided between the dishwasher 26 and the confluence pipe 80 described later.

As shown in FIG. 3A, the end of the branch pipe portion 54 in the pipe joint 50 is a large-diameter cylindrical mounting portion 70, and the bag body 66 and the cover 68 are mounted on the mounting portion 70. Has been done.

A male screw portion 72 for mounting is formed on the outer periphery of the mounting portion 70, and a female screw portion 74 for mounting is formed on the inner peripheral surface of the lower end portion of the cover 68. By screwing the mounting female screw portion 74 into the mounting male screw portion 72, the bag body 66 and the cover 68 are attached to the mounting portion 70.

A plurality of ventilation holes 76 are formed on the top surface 68A of the cover 68. As a result, the change in the internal pressure inside the cover 68 can be suppressed.

(Combined pipe)
As shown in FIG. 1, a merging pipe 80 as an example of a merging member is provided on the downstream side of the pipe joint 50.

The combined pipe 80 has a linear straight portion 80A arranged in the vertical direction. The straight portion 80A extends from the pipe joint 50 to the lower side of the floor 20, and the end portion (upper end portion) of the straight portion 80A on the upstream side in the drainage direction is connected to the large diameter portion 52A of the main portion 52 of the pipe joint 50. The end portion (lower end portion) of the straight line portion 80A on the downstream side in the drainage direction is connected to the vertical portion 78A of the L-shaped pipe 78, which will be described later, on the lower side of the floor 20.

The straight portion 80A is an example of the first pipe portion of the present invention, and the end portion (upper end portion) of the straight portion 80A on the upstream side in the drainage direction is an example of the first inflow portion of the present invention. Further, the curved portion 80B is an example of the second pipe portion of the present invention, and the end portion of the curved portion 80B on the downstream side in the drainage direction is an example of the second inflow portion of the present invention.

As shown in FIG. 5, on the side portion of the straight portion 80A, one end side of the curved curved portion 80B is located on the downstream side of the straight portion 80A at a relatively small angle (for example, 45 degrees or less) with respect to the straight portion 80A. It faces and is connected integrally. In other words, the axis of the end of the curved portion 80B on the downstream side in the drainage direction is directed diagonally downward with respect to the axis of the straight portion 80A.

As shown in FIGS. 1 and 5, in the merging pipe 80, the curved portion 80B is arranged on the upper side of the bottom plate (as an example of the plate material of the present invention) 24A of the sink 24, and the axis 80ACL and the curved portion of the straight portion 80A are arranged. The intersection of the 80B with the axis 80BCL (an example of the merging portion of the present invention) P is located above the bottom plate 24A of the sink 24. In the straight line portion 80A, the lower portion of the intersection P penetrates the hole 25 formed in the bottom plate 24A of the sink 24 and the hole 21 formed in the floor 20.

As shown in FIG. 1, the dishwasher 26 is provided with a drain trap 82, and the drain trap 82 is arranged on the upper side of the bottom plate 24A of the sink 24 and is arranged on the upper side of the bottom plate 24A of the sink 24. It is connected to the curved portion 80B of.

An L-shaped pipe 78 is provided between the floor slab 12 and the floor 20 on the lower side of the combined pipe 80. The L-shaped pipe 78 includes a vertical portion 78A extending along the vertical direction, a horizontal portion 78B extending along the horizontal direction, and a curved portion 78C connecting the vertical portion 78A and the horizontal portion 78B.

A horizontal pull pipe 90A of the siphon drain pipe 90 is connected to the end of the horizontal portion 78B of the L-shaped pipe 78 on the downstream side in the drainage direction. The siphon drainage pipe 90 is an L-shaped drop pipe 90A as an example of a pipe extending in the horizontal direction on the floor slab 12, a vertical pipe 90B extending in the vertical direction, and an L-shaped drop connecting the horizontal pipe 90A and the vertical pipe 90B. It is configured to include a pipe 90C. The vertical pipe 90B is connected to the drainage stand pipe 16 via the drainage joint 18.

The siphon drainage pipe 90 generates a siphon force by flowing the drainage that has flowed from the horizontal pull pipe 90A into the vertical pipe 90B downward in a full flow state. The siphon force toward the discharge direction acts on the drainage on the upstream side of the horizontal pull pipe 90A and the horizontal pull pipe 90A by being pulled by the siphon force generated in the vertical pipe 90B. In the present embodiment, in order to efficiently generate the siphon force, the pipe diameter of the pipe on the downstream side of the S-shaped trap 40 is set to 20 A as an example, but the pipe diameter is not limited to this.

(Action)
The drainage pipe structure 10 according to the present embodiment is configured as described above, and its operation will be described below.
When drainage is drained to the sink 22, the drainage is the drainage port member 28, the elbow 38, the S-shaped trap 40, the main portion 52 of the pipe joint 50, the straight portion 80A of the merging pipe 80, and the L-shaped pipe. It flows into the siphon drainage pipe 90 via 78.

In the siphon drainage pipe 90, the siphon force is generated by the drainage flowing into the vertical pipe 90B flowing downward in a full flow state, and the siphon force can quickly drain the drainage on the upstream side to the downstream side.

On the other hand, when the drainage is discharged from the dishwasher 26, the drainage flows into the siphon drainage pipe 90 via the curved portion 80B of the merging pipe 80, the straight portion 80A, and the L-shaped pipe 78. Then, when the drainage flowing into the vertical pipe 90B flows downward in a full flow state, the drainage discharged from the dishwasher 26 can be quickly flowed to the downstream side by the siphon force.

Until the drainage discharged from the dishwasher 26 reaches the confluence pipe 80, the air between the drain trap 82 of the dishwasher 26 and the confluence pipe 80 is pushed and the pressure in the pipe rises. This pressure acts not only on the drainage downstream side (drainage stand pipe 16 side) of the merge pipe 80 via the merge pipe 80, but also on the drainage direction upstream side, that is, the S-shaped trap 40 side. If the pressure acting on the S-shaped trap 40 side is large, the S-shaped trap 40 may be broken and the air in the drain pipe may be discharged to the sink 22 via the drain port member 28.

However, since the pressure relaxation device 64 is provided between the confluence pipe 80 and the S-shaped trap 40, the pressure increase acting on the S-shaped trap 40 when the drainage is discharged from the dishwasher 26 is relaxed. It is possible to prevent the S-shaped trap 40 from being broken.

Further, in the merging pipe 80, the air and drainage from the dishwasher 26 side flow into the straight portion 80A through the curved portion 80B, but the air and drainage discharged from the curved portion 80B to the straight portion 80A are discharged. Since the water is discharged toward the downstream side of the straight portion 80A in the drainage direction at a relatively small angle with respect to the straight portion 80A, the air and the drainage can easily flow to the downstream side in the drainage direction from the dishwasher 26 side. When air and drainage are discharged, it becomes difficult to apply pressure (positive pressure) to the S-shaped trap 40 side of the merging pipe 80. As a result, it is possible to prevent the S-shaped trap 40 from being broken when the drainage is discharged from the dishwasher 26.

In the drainage pipe structure 10 of the present embodiment, the drainage discharged from the sink 22 and the drainage discharged from the dishwasher 26 are straight portions of the confluence pipe 80 in which the intersection P is arranged on the upper side of the bottom plate 24A of the sink 24. Since the water is discharged from the 80A, one hole 25 is formed in the bottom plate 24A of the sink 24, one hole 21 is formed in the floor 20, and the straight portion 80A is passed through these holes 25 and the holes 21. Just do it.

That is, in the drainage pipe structure 10 of the present embodiment, there are two types of holes, a hole through which the drainage discharged from the sink 22 flows and a hole through which the drainage discharged from the dishwasher 26 flows. , The bottom plate 24A, and the floor 20 do not need to be formed, and the work of forming a hole for pipe penetration can be reduced.

Further, in the drainage pipe structure 10 of the present embodiment, the horizontal pull pipe 90A of the siphon drainage pipe 90 is connected to the straight portion 80A of the merging pipe 80 via the L-shaped pipe 78 between the floor slab 12 and the floor 20. Therefore, the horizontal orientation of the horizontal portion 78B of the L-shaped pipe 78 can be freely changed, whereby the horizontal pulling pipe 90A connected to the L-shaped pipe 78 is installed on the floor slab 12. The degree of freedom in the orientation of the arrangement) can be increased. In other words, the horizontal pulling pipe 90A can be layout-free regardless of the layout of the water supply device.

Further, in the drainage pipe structure 10 of the present embodiment, since the merging pipe 80 can be rotated around the axis of the straight portion 80A extending in the vertical direction, the direction of the curved portion 80B of the merging pipe 80 can be freely changed, and the merging pipe 80 can be freely changed. Regardless of the installation structure of the piping on the downstream side, the degree of freedom in installing the sink 22 and the dishwasher 26 can be increased. In other words, the dishwasher 26 can be layout-free with respect to the sink 22.

FIG. 6 shows an example of a conventional drainage pipe structure. In this drainage pipe structure, the drainage of the sink 22 and the drainage of the dishwasher 26 are collectively discharged to the vertical pipe 90B via the horizontal pulling pipe 90. In the middle of the pipe for flowing the drainage from the sink 22 provided with the pressure relaxation device 64 on the downstream side, the pipe 84 for flowing the drainage from the dishwasher 26 is connected via the merging pipe 116.
For example, when the pipe for flowing the drainage from the sink 22 is connected via the merging pipe 116 in the middle of the pipe for flowing the drainage from the dishwasher 26, a large amount of drainage is discharged from the sink 22 in a short time. At that time, the pressure of the air pushed by the drainage from the sink 22 is transmitted to the dishwasher 26 side through the merging pipe 116, and the drain trap 82 provided in the dishwasher 26 may be broken. ..
On the other hand, if the pipe for flowing the drainage from the dishwasher 26 is connected via the merging pipe 116 in the middle of the pipe for flowing the drainage from the sink 22 provided with the pressure relaxation device 64 on the downstream side, the drainage is drained. Does not go to the piping on the dishwasher 26 side, and the pressure fluctuation on the dishwasher 26 side is small.
Therefore, in order to prevent the drain trap 82 provided in the dishwasher 26 from being broken, a pipe for flowing the drainage from the dishwasher 26 via the confluence pipe 116 is provided in the middle of the pipe for flowing the drainage from the sink 22. You are connected.

6 and 7 show a conventional drainage pipe structure 112 and a drainage pipe structure 114. In the drainage pipe structure 112 and the drainage pipe structure 114 shown in FIGS. 6 and 7, the same components as those in the present embodiment are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 6, when the sink 22 is arranged at a position away from the right side of the drainage vertical pipe 16, the shortest horizontal pulling pipe 90A is arranged between the sink 22 and the drainage vertical pipe 16 (in other words). For example, the horizontal pull pipe 90A is arranged linearly in a plan view), the dishwasher 26 is arranged in the middle portion between the sink 22 and the drainage stand pipe 16 on the left side, and the drainage from the dishwasher 26 is drained. It is necessary to connect the pipe 84 for flowing the water to the merging pipe 116 connected to the horizontal pulling pipe 90A.

Further, as shown in FIG. 7, when the sink 22 is arranged at a position away from the left side of the drainage vertical pipe 16, if the horizontal pulling pipe 90A having the shortest length is arranged between the sink 22 and the drainage vertical pipe 16. It is necessary to arrange the dishwasher 26 in the middle part between the sink 22 and the drainage stand 16 on the right side, and connect the pipe 84 for draining the drainage from the dishwasher 26 to the confluence pipe 116 connected to the horizontal pull pipe 90A. There is.

As shown in FIG. 6, when the sink 22 is arranged at a position away from the right side of the drainage pipe 16, let's tentatively install the dishwasher 26 on the right side of the sink 22 (in the direction opposite to the drainage pipe 16). Then, it is necessary to bend and route the horizontal pulling pipe 90A arranged between the sink 22 and the drainage stand pipe 16 in a plan view, and a long pipe is required.

The drainage pipe structure shown in FIG. 7 is the same as the drainage pipe structure shown in FIG. 6, and when the sink 22 is arranged at a position away from the left side of the drainage stand pipe 16, the dishwasher 26 is temporarily placed on the left side of the sink 22. When trying to install in (the direction opposite to the drainage stand pipe 16), it is necessary to bend and route the horizontal pull pipe 90A arranged between the sink 22 and the drainage stand pipe 16 in a plan view, and the horizontal pull pipe 90A is arranged in a straight line. The pipe length is longer than in the case.

The siphon drainage pipe 90 can drain water more efficiently than a gradient pipe due to the siphon force, but if the pipe length becomes too long, problems such as a delay in starting the siphon force may occur. .. However, in the drainage pipe structure 10 of the present embodiment, the horizontal pulling pipe 90A arranged between the sink 22 and the drainage stand pipe 16 can be made linear in a plan view to have the shortest length. Therefore, it is possible to suppress the occurrence of a problem when the horizontal pulling pipe 90A is lengthened.

[Second Embodiment]
The drainage pipe structure 10 according to the second embodiment of the present invention will be described with reference to FIGS. 8 and 9. The same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.
In the drainage pipe structure 10 of the present embodiment, the pressure relief device 64 is connected to the middle portion of the pipe 84 via a T-shaped joint 92 and a pipe joint 94.

The pipe joint 94 includes a straight pipe portion 98 extending in the vertical direction and a funnel portion 100 whose diameter gradually increases upward, and a mounting male screw portion 102 formed on the outer periphery of the funnel portion 100. The cover 68 is attached as in the first embodiment.

(Action)
According to the drainage pipe structure 10 of the present embodiment, the pressure relief device 64 provided in front of the confluence pipe 80 alleviates the pressure increase when the drainage is discharged from the dishwasher 26 in front of the confluence pipe 80. Therefore, the pressure increase acting on the S-shaped trap 40 can be more effectively alleviated, and the breakage of the S-shaped trap 40 can be effectively suppressed.

[Third Embodiment]
The drainage pipe structure 10 according to the third embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 10, the merging pipe 80 used in the drainage pipe structure 10 of the present embodiment has a shorter straight portion 80A below the intersection point P as compared with the first embodiment, and the length of the straight portion 80A is shorter than that of the first embodiment. In the L-shaped pipe 78 used for the drainage pipe structure 10 of the above, the length of the vertical portion 78A is longer than that of the first embodiment, and the straight portion 80A of the merging pipe 80 and the vertical portion 78 of the L-shaped pipe 78 are vertical. The portion 78A is connected (reference numeral 81) on the upper side of the bottom plate 24A of the sink 24.

Leakage of drainage often occurs at the connection between pipes. Further, if there is a repaired portion on the lower side of the floor 20, it is necessary to peel off the floor 20, which complicates the work. Therefore, as in the present embodiment, it is preferable to provide the connection portion between the pipes (as an example, the portion indicated by reference numerals 81, 86, 88 in FIG. 1) on the upper side of the floor 20 as much as possible.

(Test example)
A drainage pipe structure according to an example to which the present invention was applied and a drainage pipe structure according to a comparative example were prototyped, and whether or not the drain trap was broken was investigated.

The drainage pipe structure used in the experiment is the drainage pipe structure of the first embodiment shown in FIG. 1, in which the flow path from the S-shaped trap (the liquid level on the downstream side of the sealed water; see FIG. 2) to the merging pipe The ratio A / B of the volume A and the volume B from the drain trap of the dishwasher to the merging pipe is variously changed.

In the test, whether or not the S-shaped trap was broken when the drainage was discharged from the dishwasher, and the value of the pressure increased in the flow path between the S-shaped trap and the merging pipe (based on atmospheric pressure). ) Was investigated.

As a result of the test, by setting the ratio A / B of the volume A of the flow path from the S-shaped trap to the merging pipe to the volume B from the drain trap of the dishwasher to the merging pipe to 1.0 or more, the dishwasher was washed. It can be seen that it is possible to suppress the breakage of the S-shaped trap when the drainage is discharged from the machine. Further, this makes it possible to reduce the volume of the pressure relaxation device.

In order to suppress the rupture of the S-shaped trap, it is sufficient that the pipe volume between the merging pipe and the S-shaped trap is 1.0 times the pipe volume between the merging pipe and the S-shaped trap. Therefore, if the pipe volume between the combined pipe and the S-shaped trap exceeds 2.0 times the pipe volume between the combined pipe and the dishwasher, the pipe length between the combined pipe and the S-shaped trap becomes longer. It will be longer than necessary, and the piping members will be wasted.

[Other embodiments]
Although an example of the embodiment of the present invention has been described above, the embodiment of the present invention is not limited to the above, and can be variously modified and implemented without departing from the gist thereof. Of course there is.

In the above embodiment, as an example, the drainage pipe structure 10 provided with the sink 22 and the dishwasher 26 is shown, but the present invention is not limited to this, and the drainage pipe structure is a water supply device. May be provided in three or more. In this case, a merging pipe for merging the drainage discharged from a plurality of water circulation appliances may be used, and the merging portion may be provided on the bottom plate 24A as in the above embodiment.

In the above embodiment, the bottom plate 24A of the sink 24 and the floor 20 are provided under the sink 22 and the dishwasher 26, but the bottom plate 24A of the sink 24 may not be provided.

In the above embodiment, the S-shaped trap 40 is provided on the downstream side of the drainage port member 28 in the drainage direction, but other types of drainage traps having a structure other than the S-shaped trap 40 are located on the downstream side of the drainage port member 28 in the drainage direction. It may be provided.

In the drainage pipe structure 10 of the present embodiment, a siphon drainage system provided with a siphon drainage pipe 90 has been used, but it can also be applied to a conventional general drainage system that is not a siphon drainage system.

10 ... Drainage piping structure, 20 ... Floor (plate material), 22 ... Sink (first water supply equipment), 24A ... Bottom plate (plate material), 26 ... Dishwasher (second water supply equipment), 40 ... S-shaped Trap (drainage trap), 66 ... bag body, 78 ... L-shaped pipe, 78A ... vertical part, 78B ... horizontal part, 80 ... merging pipe (merging member), 80A ... straight part (first inflow part, discharge part) ), 80B ... Curved part (second inflow part), 90A ... Horizontal pull pipe (pipe extending in the lateral direction), P ... Intersection point (confluence part)

Claims (5)

The first water supply device that is placed above the horizontally arranged plate and drains the drainage,
A second water supply device that is placed above the plate and discharges wastewater,
The first inflow portion for inflowing the drainage from the first water-related equipment, the second inflow portion for inflowing the drainage from the second water-related equipment, the drainage from the first water-related equipment and the above. The merging portion where the drainage from the second water circulatory device is merged above the plate material, and the drainage from the first water circling device and the second water provided on the downstream side in the drainage direction of the merging portion. A merging member with a drainage unit that drains the drainage from the surrounding equipment,
Have,
The merging member has a linear shape, and has a first pipe portion that allows drainage from the upstream side in the drainage direction to flow in from the first inflow portion provided on the upper side and discharges toward the lower end portion, and one end thereof. A second pipe portion is connected so as to face the downstream side of the first pipe portion, and drainage from the second water circulation device is allowed to flow in from the second inflow portion provided on the other end side. Have,
A drainage pipe structure in which the axis of the end of the second pipe portion on the downstream side in the drainage direction has an angle of 45 degrees or less with respect to the axis of the first pipe portion . The drainage pipe structure according to claim 1 , wherein a drain trap is provided between the first water circulation device and the merging member. The drainage pipe structure according to claim 2 , wherein the pipe volume between the drain trap and the merging member is set to be equal to or larger than the pipe volume between the second water supply device and the merging member. A bag body is provided between the second water circulation device and the merging member to receive the pressure of air in the flow path between the second water circling device and the merging member from the inside of the lower part and expand / contract. The drainage pipe structure according to claim 2 . On the downstream side of the merging member in the drainage direction, an L-shaped pipe having a vertical portion extending in the vertical direction and a horizontal portion provided on the downstream side in the drainage direction of the vertical portion and extending in the horizontal direction is provided.
A pipe extending in the lateral direction is provided on the downstream side of the horizontal portion in the drainage direction.
The drainage pipe structure according to any one of claims 1 to 4 .

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