TW202003972A - Drainage water piping structure - Google Patents

Abstract

Drainage water piping structure 10 includes: drainage water discharge pipe 24A that discharges drainage water from wash-basin 22; vertical part 60A of L-shaped pipe 60 provided downstream in a drainage direction from drainage water discharge pipe 24A, through which drainage water flows downstream in the drainage direction; and drainage water trap 26 provided between drainage water discharge pipe 24A and vertical part 60A, the drainage water trap 26 including a first curved pipe member 28 and a second curved pipe member 30 configured rotatably within a horizontal plane relative to the first curved pipe member 28.

Description

Drainage piping structure

The present invention relates to a drainage piping structure in which a drainage trap is provided on the downstream side of a water appliance.

In order to prevent the odor from the downstream side from being discharged toward the water appliance, a so-called S-shaped trap is provided as an example on the downstream side of the water appliance (for example, refer to Patent Document 1).

The S-shaped trap is disposed between the upstream piping on the water appliance side and the downstream piping that rises upward through the floor, and is connected to the piping on the water appliance side and the piping that rises from the floor.

[Prior Technical Literature]

[Patent Literature]

Patent Literature 1: Japanese Patent Laid-Open No. 2015-98702

In addition, when installing this S-shaped trap, it is mostly determined after determining the position of the piping on the water appliance side or the piping on the downstream side from the floor, in this case, it will be difficult to install the S There is a problem with the word catcher, and there is room for improvement.

That is, the S-shaped trap is integrally formed with synthetic resin such as PVC, and determines the distance between the upstream end (upper end) of the drainage direction and the downstream end (lower end) of the drainage direction in the horizontal direction, in other words, The spacing will be fixed, but the horizontal distance between the piping on the water appliance side and the piping standing from the floor will include errors during construction. In the case of a large gap, the piping will be bent and need to be revised. There is room for improvement in piping.

The present invention takes the above facts into consideration, and its object is to provide a drainage piping structure in which a drainage trap can be easily installed.

The drain piping structure of claim 1 is provided with: a first drain piping that drains water from a water appliance; a second drain piping that is installed downstream of the drain direction of the first drain piping and flows the drain in the drain direction Downstream side; and a drain catcher provided between the first drain pipe and the second drain pipe; the drain catcher is configured to include: a first curved pipe member connected to the first drain pipe , And the direction is changed from below to above to store the sealed water; and the second bent pipe member is provided on the downstream side of the first bent pipe member in the drainage direction, and the direction is changed from above to below and can be opposite The first curved tube member rotates in a horizontal plane.

The drain trap used in the drain piping structure of claim 1 can connect the upstream end of the first bent pipe member in the drain direction to the downstream end of the first drain pipe in the drain direction, and connect the second bent pipe member to the The downstream end of the drainage direction is connected to the upstream end of the second drainage pipe in the drainage direction.

The drainage trap can rotate the first curved pipe member and the second curved pipe member relatively in a horizontal plane, thereby changing the drainage direction of the upstream end of the first curved pipe member and the drainage of the second curved pipe member The axial center distance of the downstream end in the direction.

Therefore, the axial distance between the downstream end of the first drainage pipe and the upstream end of the second drainage pipe in the drainage direction is aligned, and by changing the drainage trap The distance between the axial center of the upstream end in the drainage direction and the axial center of the downstream side in the drainage direction makes it easy to connect the drainage trap to the first drainage pipe and the second drainage pipe.

The invention of claim 2 is the drainage piping structure of claim 1, wherein the second curved pipe member has a cross-sectional shape change portion, and the cross-sectional shape of the right-angle axis of the flow channel on the upstream side in the drainage direction is circular, while the drainage The right-angle cross-sectional shape of the flow channel on the downstream side has a long axis and a short axis.

The cross-sectional shape at right angles to the axis of the flow channel, in other words, when the shape of the inner surface of the pipe is fixed from the upstream side in the drainage direction to the downstream side in the drainage direction, foreign matter in the drainage will be difficult to be caught in the inner surface of the pipe, and the When the shape of the right-angle cross-section of the shaft changes, compared with the case where the shape of the right-angle cross-section of the shaft is fixed, the foreign matter in the drainage will be easily caught in the part where the shape of the right-angle cross-section of the shaft changes. In other words, it is easy to catch the foreign matter in the drainage in the cross-sectional shape change portion of the second curved pipe member.

In addition, in the case where the foreign matter is caught inside the second curved pipe member, for example, the first curved pipe member can be separated from the second curved pipe member, and the internal foreign matter can be easily removed from the end of the second curved pipe member .

For example, when the foreign matter in the drainage is caught in the piping under the floor, although the foreign matter in the piping cannot be easily removed, by setting the drainage trap above the floor, it can be easily removed from the drainage trap Foreign body. In addition, the foreign matter in the drainage can be caught upstream of the piping under the floor, so it is possible to prevent foreign matter in the drainage from getting stuck in the piping under the floor beforehand.

In addition, the right-angle cross-sectional shape of the axis having the long axis and the short axis may also be called a flat shape such as an ellipse.

According to the invention of claim 3, in the drainage piping structure of claim 2, the cross-sectional area of the flow path when the flow path of the second curved pipe member is viewed from a right-angled cross-section is fixed from upstream in the drainage direction to downstream in the drainage direction.

When the cross-sectional area of the piping flow channel becomes small in the middle, the impedance during the circulation of the drainage becomes larger, which makes the drainage difficult to circulate.

In the drainage trap of claim 3, although the cross-sectional shape of the second curved pipe member is changed, the cross-sectional area of the flow channel is fixed, so it hardly affects the impedance of the flow channel during the circulation and drainage.

The invention of claim 4 In the drain piping structure of claim 1, between the first drain piping and the drain catcher, a different-diameter drain pipe is formed, which is formed on the inner peripheral surface with respect to the drain direction The intersecting step difference surface, and the inner diameter of the downstream side of the step difference surface in the drainage direction will be relatively smaller than the inner diameter of the upstream side in the drainage direction.

In one example, when a siphonic drainage pipe is used in a drainage piping structure, drainage is accumulated in the water appliance. The drainage will rotate at the bottom of the water appliance to produce a vortex, and there will be a hollow part in the center of the vortex, that is, it will Allow air to enter the piping. When the air enters the piping, it will slow down the siphonic drain pipe to reach full flow, and as a result, the siphonic force will be generated slowly.

In the drainage piping structure of claim 4, the stepped surface is provided in the pipe of the different-diameter drain pipe to allow the drain to be subjected to impedance and suppress the generation of vortices in the portion where the diameter of the pipe changes, and the piping on the downstream side of the stepped surface It is easy to reach full flow in the interior, and it can quickly produce siphon force.

The invention of claim 5 In the drain piping structure of claim 2, between the first drain piping and the drain catcher, a different-diameter drain pipe is formed, which is formed on the inner peripheral surface with respect to the drain direction The intersecting step difference surface, and the inner diameter of the downstream side of the step difference surface in the drainage direction will be relatively smaller than the inner diameter of the upstream side in the drainage direction.

In one example, when a siphonic drainage pipe is used in a drainage piping structure, when water is accumulated in the water appliance, the drainage will rotate at the bottom of the water appliance and generate a vortex, and there will be a central hollow part of the vortex, that is, Conditions that allow air to enter the piping. When the air enters the piping, it will slow down the siphonic drain pipe to reach full flow, and as a result, the siphonic force will be generated slowly.

In the drainage piping structure of claim 5, the step difference surface is provided in the pipe of the different-diameter drain pipe to allow the drain to be subjected to impedance and suppress the generation of vortices in the portion where the diameter of the pipe changes, and the downstream side of the step difference surface It is easy to reach full flow in the piping, which can quickly produce siphon force.

The invention of claim 6 In the drain piping structure of claim 3, between the first drain piping and the drain catcher, a reduced-diameter drain pipe is formed, which is formed on the inner peripheral surface with respect to the drain direction The intersecting step difference surface, and the inner diameter of the downstream side of the step difference surface in the drainage direction will be relatively smaller than the inner diameter of the upstream side in the drainage direction.

In one example, when a siphonic drainage pipe is used in a drainage piping structure, when water is accumulated in the water appliance, the drainage will rotate at the bottom of the water appliance to generate a vortex, and there will be a central hollow part of the vortex, that is, it will Allow air to enter the piping. When the air enters the piping, it will slow down the siphonic drain pipe to reach full flow, and as a result, the siphonic force will be generated slowly.

In the drainage piping structure of claim 6, a step difference surface is provided in the pipe of the different-diameter drain pipe to allow the drain to be subjected to impedance to suppress the generation of vortex at the portion where the diameter of the pipe changes, and to allow the piping downstream of the step difference surface It is easy to reach full flow in the interior, and it can quickly produce siphon force.

The invention of claim 7 In the drainage piping structure of any one of claim 1 to claim 6, the first bent pipe member and the second bent pipe member are connected through a relay pipe; the relay pipe is provided with An insertion recess into which the upstream end of the second curved pipe member in the drainage direction is inserted; an elastic material is arranged between the bottom of the insertion recess and the upstream end of the second curved pipe member in the drainage direction The formed ring gasket seals the gap between the relay tube and the second curved tube member.

In the drainage piping structure of claim 7, the first bent pipe member and the second bent pipe member are connected through the relay pipe.

The insertion recess of the relay pipe allows the end of the second curved pipe member in the drain direction upstream to be inserted, and an elastic material is disposed between the bottom of the insertion recess and the upstream end of the second bend pipe member in the drain direction The ring gasket is formed to seal the gap between the relay pipe and the second curved pipe member. With this, it is possible to suppress the overflow of the drain water from between the relay pipe and the second curved pipe member.

As described above, the drainage piping structure of the present invention has an excellent effect of easily installing the drainage trap.

10‧‧‧Drainage piping structure

22‧‧‧Washboard

24A‧‧‧Drain discharge pipe (1st drain pipe)

26‧‧‧Drainage catcher

28‧‧‧The first bending pipe member

30‧‧‧Second bending pipe member

30B‧‧‧Bent section (section with changed shape)

60‧‧‧L-shaped piping (second drain piping)

84‧‧‧recess

88‧‧‧flat gasket (gasket)

90‧‧‧Reduced diameter drain pipe

98‧‧‧Difference surface

Fig. 1 is a side view showing the structure of a drainage pipe according to the first embodiment of the present invention.

Fig. 2 is a side view showing a drain trap used in the drain piping structure according to the first embodiment.

FIG. 3 is a cross-sectional side view showing a part of the first bent pipe member of the drain trap.

Fig. 4(A) is a side view showing the second bent pipe member of the drainage trap, and Fig. 4(B) is a side view showing a part of the second bent pipe member of the drainage trap as a cross section (Fig. 2) Right view).

5(A) is a cross-sectional view taken along line AA of the drainage trap shown in FIG. 2, FIG. 5(B) is a cross-sectional view taken along line BB of the drain trap shown in FIG. 2, and FIG. 5(C) is FIG. 2 The CC line section of the drainage trap shown.

6(A) is an explanatory diagram for explaining a case where the axial distance between the axis of the upstream end of the first curved pipe member and the axis of the downstream end of the second curved pipe member is maximized, and FIG. 6(B) is an illustration An explanatory diagram of the case where the axial distance between the axis of the upstream end of the first bent pipe member and the axis of the downstream end of the second bent pipe member is minimized, and FIG. 6(C) shows a drain discharge pipe of the drain port member A diagram illustrating the distance between the axis of the horizontal axis and the axis of the vertical portion of the L-shaped pipe in the horizontal direction.

7 is a horizontal cross-sectional view of a drain trap related to a second embodiment.

8 is a cross-sectional view showing a relay pipe used in a drain trap according to a third embodiment.

FIG. 9(A) is a cross-sectional view showing a different-diameter drain pipe of the drain piping structure according to the fourth embodiment, and FIG. 9(B) is an enlarged cross-sectional view showing a stepped surface of the different-diameter drain pipe.

[First Embodiment]

The drainage piping structure 10 according to the first embodiment of the present invention will be described based on FIGS. 1 to 6.

As shown in FIG. 1, the drainage piping structure 10 of the present embodiment is used in a collective residence composed of a plurality of floors (only a predetermined floor is shown in FIG. 1 ). The housing complex is equipped with a drain riser 12 that allows drain to flow downward. The drainage riser 12 is a concrete floor slab 14 extending in the up and down direction (vertical direction) of the housing complex and penetrating each floor of the housing complex. In addition, although the drainage piping structure related to the present invention is applied to a collective house, it can also be used in a single-family house or factory other than the collective house.

Each household on each floor of the assembly house is provided with a face wash as an example of the water appliance of the present invention above the floor board 20 of the living room 16 (left side of the wall portion 18 shown by a two-dot chain line in FIG. 1) Taiwan 22.

The drain member 24 of the wash stand 22 is provided with a drain outlet pipe 24A that is curved in an L shape and has a right-angled cross-section that extends downward, and serves as an example of the first drain pipe. A drain trap 26 is connected to the vertical portion of the drain discharge pipe 24A

(Drain trap)

As shown in FIG. 2, the drain trap 26 connects the first curved pipe member 28 and the second curved pipe member 30 to form an S shape in side view, and the first curved pipe member 28 is formed from below It is a way to change the direction upwards, and is arranged in a slightly U-shape in the side view, and is arranged on the upstream side in the drainage direction. The second curved pipe member 30 is a way to change the direction from above to below, and When viewed from the side, it is slightly U-shaped and arranged on the downstream side in the drainage direction. In other words, the drain trap 26 is a so-called S-shaped trap.

(1st bent pipe member)

As shown in FIG. 3, the first curved pipe member 28 is provided with a straight line extending in the vertical direction on the upstream side in the drainage direction and having the same inner diameter and the same outer diameter as the drainage discharge pipe 24A. Part 28A. An upstream end (upper end) of the straight portion 28A in the drainage direction is formed with a large-diameter pipe portion 28B having a circular cross section at a right-angled axis that allows the drainage discharge pipe 24A to be rotatably inserted.

A male thread 29 is formed on the outer circumference of the large-diameter pipe portion 28B, and the male thread 29 is detachably attached with a hand lock nut 32. A gasket 34 is interposed between the large-diameter pipe part 28B and the drain discharge pipe 24A and the drain discharge pipe 24A is inserted into the large-diameter pipe part 28B, and by locking the hand lock nut 32, the drain trap The first curved pipe member 28 of 26 is connected to the drain discharge pipe 24A.

In the first curved tube member 28, a curved portion 28C having a semi-circular arc shape when viewed from the side is continuously formed at the lower end portion of the linear portion 28A. The curved portion 28C has a circular cross section at a right angle to the axis. The bottom of the bent portion 28C is provided with a cylindrical cleaning port 36 that opens downward. A male screw portion 36A is formed on the outer periphery of the cleaning port 36. By screwing the female screw portion 38A of the cover body 38 to this male screw portion 36A, the cover body 38 is attached to the cleaning port 36.

In addition, the cleaning port 36 is attached with a gasket 40 for covering the cleaning port as a waterproof member. The cleaning port covering gasket 40 has a gasket body 40A and a columnar portion 40B. The gasket 40 for cleaning the mouth cover is preferably made of rubber or the like, and may also be an elastic member such as other resin or synthetic rubber.

The shim body 40A has a circular plate shape, and is a portion sandwiched between the end face of the cleaning port 36 and the bottom of the cover 38. The columnar portion 40B has a cylindrical shape and is formed integrally with the gasket body 40A. In a state where the cover 38 is attached to the cleaning port 36, it is a portion that fills the space inside the cleaning port 36.

The first curved pipe member 28 is formed with a large-diameter pipe portion 28D having a circular cross section at a right angle to the axis. The large-diameter pipe portion 28D extends at the downstream end of the curved portion 28 in the drainage direction and extends in the vertical direction, It has a larger diameter than the bent portion 28C, and allows the straight portion 30A of the second bent pipe member 30 described below to be inserted.

A male thread 42 is formed on the outer circumference of the large-diameter pipe portion 28D, and the male thread 42 is detachably attached with a hand lock nut 44. A spacer 46 is interposed between the large-diameter tube portion 28D and the hand lock nut 44 and the straight portion 30A of the second curved tube member 30 described below is inserted into the large-diameter tube portion 28D, and the hand lock nut 44 is locked by , The second curved pipe member 30 can be connected to the first curved pipe member 28.

In addition, in the first curved tube member 28, the straight portion 28A and the curved portion 28C have the same inner diameter.

An example of the first curved tube member 28 of this embodiment can be formed by injection molding, but it can also be formed by other methods.

(Second bending pipe member)

As shown in FIG. 4, the second curved pipe member 30 is provided with a vertical direction extending on the upstream side in the drainage direction, and has the same inner diameter and the same outer diameter as the curved portion 28C of the first curved pipe member 28, and The cross section having a right angle on the axis is a circular straight portion 30A.

As shown in FIGS. 2 and 3, the linear portion 30A of the second curved tube member 30 is rotatably inserted into the large-diameter tube portion 28D of the first curved tube member 28. Therefore, the second curved tube member 30 can rotate relative to the first curved tube member 28 in the horizontal plane, with the axis of the linear portion 30A and the large-diameter tube portion 28D as the center.

As shown in FIG. 4, the upper end of the straight portion 30A is continuously formed with a curved portion 30B that is an example of a cross-sectional shape change portion that is slightly semicircular in a side view (see FIG. 4(B) ), and the other end of the curved portion 30B A straight portion 30C extending downward is continuously formed.

The curved portion 30B extends from the upstream end in the drainage direction (connecting portion with the straight portion 30A) to the downstream end in the drainage direction (connecting portion with the straight portion 30C described below) and the right-angle section of the axis gradually changes from circular to In the ellipse (refer to FIGS. 4 and 5(A) and (B)), at the downstream end in the drainage direction (the connection to the straight portion 30C. Refer to FIG. 5(B)), the long axis LCL of the ellipse is longest. In other words, the ratio of the length of the long axis LCL of the ellipse to the length of the short axis SCL (the length of the long axis LCL/the length of the short axis SCL) at the downstream end of the curved portion 30B in the drainage direction becomes the maximum.

As shown in FIGS. 4 and 5, in the curved portion 30B of the present embodiment, the long axis LCL of the ellipse faces the direction of the upstream end portion and the downstream end portion of the drainage direction with respect to the drainage direction connecting the curved portion 30B (arrow A direction) and orthogonal direction.

The straight portion 30C continuously formed at the other end of the curved portion 30B faces downward and the cross-sectional shape of the right-angle axis of the flow channel gradually changes from elliptical to circular (in an example, according to FIG. 5(A), FIG. 5(B ), the sequence of Figure 5(C) is changed).

As shown in FIG. 4, the downstream end of the straight portion 30C in the drainage direction is formed with a large-diameter pipe portion 30D having a right-angled cross-section with a circular axis. The large-diameter pipe portion 30D is given as an example of the second drainage pipe described below The vertical portion 60A of the L-shaped pipe 60 is inserted rotatably. A male thread 48 is formed on the outer circumference of the large-diameter pipe portion 30D, and the male thread 48 is detachably attached with a hand lock nut 50.

A spacer 52 is interposed between the large-diameter pipe portion 30D and the vertical portion 60A and the vertical portion 60A is inserted into the large-diameter pipe portion 30D. By locking the hand lock nut 50, the vertical portion 60A of the L-shaped pipe 60 can be inserted It is connected to the second curved tube member 30.

In addition, in the drain trap 26 of the present embodiment, a cylindrical vent valve mounting portion 54 that opens upward is formed above the curved portion 30B of the second curved pipe member 30.

A male screw 56 is formed on the outer periphery of the vent valve mounting portion 54. As shown in FIG. 2, the male screw 56 is fitted with a vent valve 58. The vent valve 58 is a member that allows air from the outside to pass through the drain trap 26 and does not allow drain and air to pass from the drain trap 26 toward the outside. Since the vent valve 58 has the same structure as the conventional drain trap, the detailed description is omitted.

An example of the second curved tube member 30 of this embodiment can be formed by blow molding, but it can also be formed by other methods.

(L-shaped piping)

As shown in FIG. 1, on the downstream side in the drainage direction of the drainage trap 26, an L-shaped pipe 60 having a circular cross-sectional shape with a right-angled axis bent in an L shape is arranged. The L-shaped piping 60 is configured to include: a vertical portion 60A, a vertical portion 60A inserted into the large-diameter pipe portion 30D of the drain trap 26 and extending in the vertical direction; a horizontal portion 60B, disposed on the floor 14 In the horizontal direction, it extends in the horizontal direction; and the curved portion 60C connects the vertical portion 60A and the horizontal portion 60B. For the L-shaped pipe 60, a commercially available product (for example, also referred to as an elbow pipe) formed of synthetic resin such as rigid vinyl chloride resin can be used.

On the downstream side of the L-shaped pipe 60 in the drainage direction, a horizontally-drawn pipe member 64 that forms part of the siphon-type drain pipe 62 is arranged. The cross-pull pipe member 64 of the present embodiment uses flexible synthetic resin pipes having a nominal diameter of 20 as defined in JISK6778 and JISK6792. The synthetic resin piping system used for the cross-pull pipe member 64 may be, for example, a flexible polybutene tube or other types of synthetic resin piping. In addition, the cross-pull tube member 64 is not limited to the one having a nominal diameter of 20, and may be used as 25. In addition, the L-shaped pipe 60 and the horizontal pipe member 64 are connected through the joint 66.

An instrument box 68 is provided outside the living room 16 on the downstream side of the drain tube member 64 on the drainage side (the right side of the wall portion 18 shown by a two-dot chain line in FIG. 1 ).

Inside the instrument box 68, an insertion tube 70 which is part of the siphon drain pipe 62 and is bent into an L shape is arranged. The embedded tube 70 is configured to include: a horizontal portion 70A, which is arranged on the floor 14 and extends in the horizontal direction; a vertical portion 70B, which extends in the vertical direction; and a bent portion 70C, which connects the horizontal portion 70A and the vertical portion 70C . As an example of the embedding tube 70, a commercially available product (for example, also referred to as an elbow tube) formed of synthetic resin such as rigid vinyl chloride resin can be used.

In addition, the horizontal portion 70A of the horizontal tube 64 and the fitting tube 70 are connected via the joint 72.

On the downstream side of the fitting pipe 70 in the drainage direction, a riser member 74 that constitutes a part of the siphon drain pipe 62 and extends in the vertical direction is arranged. The upstream end portion of the riser member 74 in the drainage direction is connected to the vertical portion 70B of the embedded tube 70 through the joint 76.

The downstream end portion of the riser member 74 in the drainage direction is connected to the junction 78 installed in the middle portion of the drain riser 12. The riser member 74 of this embodiment uses the same piping as the cross-pull pipe member 64.

In addition, the horizontal portion 60B of the horizontally extending L-shaped pipe 60, the horizontal pipe member 64, and the horizontal portion 70A of the embedding pipe 70 are an example of the laterally pulling pipe of the siphon drain pipe of the present invention, and the embedding pipe 70 extending vertically The vertical portion 70B and the riser member 74 are an example of a riser of a siphon drain pipe.

(Effect)

Next, the function and effect of the drainage piping structure 10 of this embodiment will be described.

The drainage trap 26 of this embodiment can be divided in the middle of the drainage direction, in other words, the first curved pipe member 28 provided on the upstream side in the drainage direction and the second curved pipe member 30 provided on the downstream side in the drainage direction It can be constructed so that the first curved tube can be inserted into the connecting portion (the part where the linear portion 30A of the second curved tube member 30 is rotatably inserted into the large-diameter tube portion 28B of the first curved tube member 28) The member 28 and the second curved tube member 30 rotate relative to each other about the axes of the large-diameter tube portion 28B and the linear portion 30A. Thereby, the drain trap 26 can change the horizontal direction of the large-diameter tube portion 28B on the upstream side of the first curved tube member 28 in the drainage direction and the large-diameter tube portion 30D on the downstream side of the second curved tube member 30 in the drainage direction The distance La between the axes (refer to FIGS. 6(A) and (B)).

As an example, it can be set freely between the first state shown in FIG. 6(A) and the second state shown in FIG. 6(B), and even in the drain outlet pipe of the drain member 24 of the washstand 22 The axial distance Lb (refer to FIG. 6(C)) of the vertical portion 60A of the L-shaped pipe 60 standing upward from the floor plate 20 above the floor plate 20 has a construction error, and the drainage catch can be changed by matching the distance L2 between the shafts The distance La between the shafts of the collector 26 allows the drain trap 26 to be easily connected to the drain discharge pipe 24A of the drain port member 24 and the vertical portion 60A of the L-shaped pipe 60.

In addition, the drain trap 26 of the present embodiment is in the second curved pipe member 30, starting from the apex of the second curved pipe member to the downstream side in the drainage direction (in other words, the connecting portion of the linear portion 30A and the curved portion 30B) To change the cross-sectional shape from a circle to an ellipse, and because the short axis of the ellipse is shorter than the diameter of the circle, the foreign matter in the drainage will easily get stuck in the changed section (in other words, In the portion where the flow path is narrowed (short axis portion)) (compared to the case where the cross-sectional shape is maintained in a circular shape).

In the drain trap 26 of the present embodiment, the first curved pipe member 28 and the second curved pipe member 30 are separable, and the portion where the cross-sectional shape of the second curved pipe member 30 changes is close to the first curved pipe member The position of the connection portion between the 28 and the second curved tube member 30 makes it possible to separate the first curved tube member 28 from the second curved tube member 30, and to easily remove the foreign matter stuck inside the second curved tube member 30.

For example, when the foreign matter in the drainage is caught inside the horizontally drawn pipe member 64 disposed on the lower side of the floor material 20 or the downstream riser member 74 on the downstream side, it is difficult to specify the position where the foreign matter is stuck, and it is not easy to remove the stuck pipe Foreign objects on the way.

However, as in the present embodiment, if foreign matter is easily caught in the drain trap 26, the foreign flow can be suppressed to the downstream side of the drain trap 26 in advance. In addition, since the removal of foreign matter can be performed on the upper side of the floor material 20, even a general user can easily remove foreign matter. In addition, foreign substances (metal, etc.) with a large specific gravity such as submerged in water will stop at the bottom of the first curved tube member 28, so the cover 38 can be removed to be easily removed from the cleaning port 36.

In the drainage piping structure 10 of this embodiment, the drainage is discharged from the washstand 22, and the drainage is kept in a full water state to circulate through the drainage trap 26, the L-shaped piping 60, the horizontally drawn pipe member 64, and flows into the riser Member 74. When the drain full of water is dropped into the riser member 74 by gravity, a siphon force is generated in the riser member 74, and the drain that is closer to the upstream side of the riser member 74 is generated by the siphon force It sucks down toward the riser member 74 and performs efficient drainage.

After draining the drain from the washstand 22, a part of the drain is stored as the sealed water SW in the drain catcher 26 in such a way that the odor and the like on the downstream side in the drainage direction are not discharged from the washstand 22 1 bending pipe member 28.

In addition, in the second curved pipe member 30 of the drain trap 26, although the right-angle cross-section of the curved portion 30B changes from a circle to an ellipse, the right-angle cross-section of the linear portion 30C changes from an ellipse to a circle. However, the cross-sectional area of the flow channel at right angles to the curved portion 30B and the straight portion 30C may be changed toward the downstream side in the drainage direction, or may be fixed.

In the second curved pipe member 30 of the drain trap 26, if the cross-sectional area of the flow channel with the axis at right angles is fixed from the upstream end to the downstream end in the drainage direction, even if the cross-sectional shape changes, it is almost It will not affect the impedance during circulation and drainage.

[Second Embodiment]

Next, the drainage piping structure 10 according to the second embodiment of the present invention will be described. In addition, the same configuration as in the first embodiment will be given the same symbol, and the description thereof will be omitted.

In the drain trap 26 of the first embodiment, as shown in FIG. 5(A), although the elliptical long axis LCL of the second curved pipe member 30 faces the upstream end with respect to the drain direction of the connecting curved portion 30 and The direction of the downstream end of the drainage direction is orthogonal to the direction (arrow A direction), but the present invention is not limited to this. In one example, as shown in FIG. 7, the elliptical long axis LCL may also face the connecting curved portion 30B The direction of the upstream end in the drainage direction and the downstream end in the drainage direction (arrow B direction), the orientation of the elliptical long axis LCL is not particularly limited.

In addition, although the drawing is omitted, the cross-sectional shape of the second curved tube member 30 changes from a circle to an ellipse, and the present invention is not limited to this. If it is a cross-sectional shape having a long axis and a short axis, it may be changed to Flat shapes other than oval.

The drainage trap 26 of this embodiment can also obtain the same functions and effects as the first drainage trap 26 described above.

[Third Embodiment]

Next, the drain piping structure 10 according to the third embodiment of the present invention will be described. In addition, the same configuration as in the first embodiment will be given the same symbol, and the description thereof will be omitted.

As shown in FIG. 8, in the drain trap 26 of this embodiment, a connection between the first curved pipe member 28 and the second curved pipe member 30 is provided between the first curved pipe member 28 and the second curved pipe member 30之Trunk tube 80.

In the drain trap 26 of the present embodiment, a male thread 82 is formed on the outer circumferential surface of the straight portion 30A of the second curved pipe member 30.

The relay pipe 80 has a straight pipe portion 80A that is inserted into the large-diameter pipe portion 28D of the first curved pipe member 28 and has a circular cross section at a right-angled axis, and the upstream end portion (upper end portion) of the straight pipe portion 80A in the drainage direction The hand-turn nut portion 83 is integrally formed.

A concave portion 84 is formed on the inner peripheral side of the hand nut portion 83, and a female thread 86 that is screwed to the male thread 82 formed by the linear portion 30A of the second curved tube member 30 is formed on the inner peripheral surface of the concave portion 84.

An annular flat gasket 88 made of an elastic material such as rubber is arranged at the bottom of the recess 84, and the flat gasket 88 is sandwiched between the end (end surface) of the linear portion 30A of the second curved tube member 30 and the bottom of the recess 84 At this time, the water stop between the relay pipe 80 and the second curved pipe member 30 is performed.

In addition, the drain trap 26 of the present embodiment can also rotate the first curved pipe member 28 and the second curved pipe member 30 relatively, and can obtain the same operational effects as the first drain trap 26 described above.

[Fourth Embodiment]

Next, the drainage piping structure 10 according to the fourth embodiment of the present invention will be described. In addition, the same configuration as in the first embodiment will be given the same symbol, and the description thereof will be omitted.

As shown in FIG. 9, in the drain piping structure 10 of the present embodiment, a different-diameter drain pipe 90 is connected between the drain outlet pipe 24 of the drain member 24 and the drain trap 26.

(Reduced-diameter drain)

As shown in FIG. 9, the reduced-diameter drain pipe 90 is provided with a small-diameter pipe portion 90A having the same inner diameter and the same outer diameter as the drain discharge pipe 24A of the drain member 24. The small-diameter pipe portion 90A is formed on the upstream side in the drainage direction The large-diameter pipe portion 90B into which the drain discharge pipe 24A is inserted.

A male thread 92 is formed on the outer circumference of the large-diameter pipe portion 90B, and the male thread 92 is detachably attached with a hand lock nut 94. A gasket 96 is interposed between the large-diameter pipe portion 90B and the drain outlet pipe 24A of the drain member 24 and the drain outlet pipe 24A is inserted into the large-diameter pipe portion 90B, and by locking the hand lock nut 94, The different-diameter drain pipe 90 is connected to the drain outlet pipe 24A of the drain member 24.

In addition, the reduced-diameter drain pipe 90 is formed with a small-diameter pipe portion 90C that requires a smaller diameter than the smaller-diameter pipe portion 90A on the downstream side of the small-diameter pipe portion 90A in the drainage direction.

A stepped surface 98 is formed between the small-diameter pipe portion 90A and the small-diameter pipe portion 90C in the inner periphery of the reduced-diameter drain pipe 90. The angle θ of the stepped surface 98 relative to the small-diameter pipe portion 90A is preferably set in the range of 90 to 100°. In addition, the step size DL of the step surface 98 measured along the radial direction is preferably set in the range of 5 to 10 mm.

The small-diameter pipe portion 90C of the different-diameter drain pipe 90 is inserted into the large-diameter pipe portion 28B of the drain trap 26. In addition, in the drainage piping structure 10 of the present embodiment, the cross-sectional area of the flow path downstream side in the drainage direction bordered by the stepped surface 98 of the different-diameter drainage pipe 90 is relatively relative to the cross-sectional area of the flow path upstream side in the drainage direction Be small.

(Effect)

Next, the function and effect of the drainage piping structure 10 of this embodiment will be described.

If there is drainage in the washstand 22, the drainage will rotate at the bottom of the washstand 22 to generate a vortex, and there will be a hollow part in the center of the vortex, which will allow air to enter the pipe and make the siphon drain 62 full. The flow condition becomes slower, and as a result, the siphon force may be generated more slowly.

In the drainage piping structure of the present embodiment, the stepped surface 98 is provided on the different-diameter drainage pipe 90 to allow the drainage to be resisted at the portion where the diameter of the pipe changes, thereby suppressing the drainage at the bottom of the washstand 22 when the drain flows through the washstand 22 The formation of the formed vortex will make it easy to achieve full flow in the piping on the downstream side of the stepped surface 98 (compared to the case where the inner diameter is fixed), and the siphon force can be quickly generated.

Further, by making the diameter of the different-diameter drain pipe 90 a small diameter halfway, even in the case of flushing, the downstream side of the stepped surface 98 can be quickly fulled.

In addition, when the angle of the stepped surface 98 exceeds 100°, it will be difficult to obtain the effect of suppressing the rotation of the drainage, and when the angle of the stepped surface 98 is less than 90, foreign objects such as dust in the drainage may be easily caught on the stepped surface 98 and Become the cause of foreign body accumulation.

In addition, when the step size DL is less than 5 mm, it is difficult to obtain the effect of suppressing the generation of vortices, and when it exceeds 10 mm, the inner diameter of the pipe on the downstream side of the stepped surface 98 becomes too thin, which reduces the drainage capacity. .

[Other embodiments]

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-mentioned contents, and it is of course possible to implement various modifications without departing from the scope of the gist in addition to the above-mentioned contents.

In the above-mentioned embodiment, the water-washing device 22 is taken as an example. However, in addition to the water-washing table 22, the water-using device may be, for example, a kitchen sink or the like. As long as it is a device for draining water, the type is not particularly limited.

10‧‧‧Drainage piping structure

12‧‧‧Drainage riser

14‧‧‧ Floor

16‧‧‧Living room

18‧‧‧ Wall

20‧‧‧ Flooring

22‧‧‧Washboard

24‧‧‧Drainage member

24A‧‧‧Drain discharge pipe

26‧‧‧Drainage catcher

38‧‧‧cover

50‧‧‧hand lock nut

58‧‧‧vent valve

60‧‧‧L-shaped piping

60A‧‧‧Vertical

60B‧‧‧Level

60C‧‧‧Bend

62‧‧‧siphon drain

64‧‧‧Transverse-pull tube member

66‧‧‧Connector

68‧‧‧ instrument box

70‧‧‧Embedded tube

70A‧‧‧Level

70B‧‧‧Vertical Department

72‧‧‧Connector

74‧‧‧Riser components

76‧‧‧Connector

78‧‧‧Bus connector

Claims (7)

A drainage piping structure with: The first drainage piping is to drain the water from the water appliance; The second drainage pipe is provided on the downstream side of the first drainage pipe in the drainage direction, and flows the drainage to the downstream side in the drainage direction; and The drainage trap is provided between the first drainage pipe and the second drainage pipe; The drain trap is configured to include: a first curved pipe member connected to the first drain pipe, and a direction change from below to upward to store sealed water; and a second curved pipe member provided at The downstream side of the first curved pipe member in the drainage direction changes direction from above to below and can rotate in a horizontal plane relative to the first curved pipe member. The drainage piping structure as claimed in item 1 of the patent scope, wherein the second curved pipe member has: a cross-sectional shape changing portion, the cross-sectional shape of the right-angle axis of the flow channel on the upstream side in the drainage direction is circular, and the downstream in the drainage direction The right-angle cross-sectional shape of the side flow channel has a long axis and a short axis. For example, in the drainage piping structure according to item 2 of the patent application scope, the cross-sectional area of the flow channel when the flow channel of the second curved pipe member is viewed from a right-angled cross-section is fixed from upstream in the drainage direction to downstream in the drainage direction. For example, the drainage piping structure according to item 1 of the patent application scope, wherein between the first drainage piping and the drainage trap is provided: a different-diameter drainage pipe, which is formed on the inner peripheral surface to intersect with the drainage direction The step difference surface, and the inner diameter of the downstream side of the step difference surface in the drainage direction will be relatively smaller than the inner diameter of the upstream side in the drainage direction. For example, the drainage piping structure according to item 2 of the patent application scope, wherein between the first drainage piping and the drainage trap is provided: a different-diameter drainage pipe, formed on the inner peripheral surface intersecting with the drainage direction The step difference surface, and the inner diameter of the downstream side of the step difference surface in the drainage direction will be relatively smaller than the inner diameter of the upstream side in the drainage direction. For example, the drainage piping structure of claim 3 of the patent scope, wherein between the first drainage piping and the drainage trap is provided: a different-diameter drainage pipe, which is formed on the inner peripheral surface to cross the drainage direction The step difference surface, and the inner diameter of the downstream side of the step difference surface in the drainage direction will be relatively smaller than the inner diameter of the upstream side in the drainage direction. For example, the drainage piping structure according to any one of items 1 to 6 of the patent application scope, wherein the first bent pipe member and the second bent pipe member are connected through a relay pipe; The relay pipe is provided with an insertion recess into which the upstream end of the second curved pipe member in the drainage direction is inserted; An annular gasket made of an elastic material is arranged between the bottom of the insertion recess and the upstream end of the second curved pipe member in the drainage direction to connect the relay pipe and the second curved pipe member The gap between them is sealed.

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