JP7072813B2 - Drain trap - Google Patents

Description

The present invention relates to a drain trap that forms a trap function that discharges wastewater from equipment and prevents odors and pests from downstream from flowing back into the room. More specifically, the present invention relates to a drain trap having a first flow path through which drainage from equipment and equipment flows in and a second flow path through which drainage from other equipment and equipment flows in.

Drainage pipes are attached to the drainage outlets of washing machines and bathrooms to drain the drainage that has flowed into the drainage outlets. It will flow backwards. Therefore, the problem is solved by providing a device having a trap function called a drain trap.
The drain trap stores drainage inside and fills a part of the drainage channel with water (water seal) by the stored drainage to prevent odors and pests from entering the room from the downstream side. To form. The wastewater stored inside is called "sealed water".
Here, the drain trap is provided with a first flow path through which drainage from the washing place pan (equipment) flows in and a second flow path through which drainage from the bathtub and bathtub pan (other equipment) flows in. It has been known. Further, the drain trap is composed of a trap main body arranged below the washing place pan and a drain elbow arranged below the bathtub and the bathtub pan.
The drainage from the washing place pan flows into the first flow path from the drainage port provided on the washing place pan. That is, it flows into the trap main body through the deodorant cylinder and the water sealing portion, and is discharged to the drainage pipe further downstream from the discharge port formed on the side wall of the trap main body. On the other hand, the drainage from the bathtub or the bathtub pan flows into the second flow path from the drainage port provided on the bathtub or the bathtub pan. That is, it flows into the drain trap main body through the drain elbow and the branch pipe portion, and is discharged to the drain pipe further downstream from the discharge port through the water sealing portion.

Here, in the above drain trap, the drainage drained from the second flow path merges with the first flow path in the trap body. Therefore, when a large amount of drainage is discharged to the second flow path, the drainage is the first flow. It may overflow from the drain of the washing place bread through the road. Therefore, in the drain trap described in Patent Document 1, a check valve is arranged in the drain flow path to prevent backflow of drainage.

Japanese Unexamined Patent Publication No. 2010-203113

However, in the drain trap described in Patent Document 1, since the valve body has a structure in contact with the lower end of the deodorizing cylinder, a space for the check valve to operate is required below the deodorizing cylinder. The device becomes large. Further, since the check valve does not have a structure in which the valve body does not always block the drainage flow path, it may not be possible to prevent the backflow of the drainage when a large amount of bubbles are mixed in the drainage. rice field.

In view of the above problems, it is an object of the present invention to prevent backflow of drainage, to provide a drain trap with a miniaturized apparatus, and to improve the backflow prevention function.

The present invention according to claim 1 for solving the above problems includes a first flow path through which drainage from equipment and equipment flows in, and a first flow path.
The second channel through which drainage from other equipment flows in,
A water seal that stores part of the wastewater,
The first flow path includes a first inlet as an inlet for drainage.
The first flow path has a deodorizing cylinder whose lower end is arranged in the water-sealed portion and which forms a water-sealed state in combination with the water-sealed portion.
The deodorant cylinder has a bent portion that directs the flow direction of the drainage that has flowed in from the first inflow port in a substantially horizontal direction, and a discharge portion that discharges the drainage that has flowed in from the bent portion in a substantially vertical direction. A swing-type valve that prevents backflow of drainage from the downstream side between the bent portion and the discharge portion, and rotates with the inflow of drainage from the upstream side to allow the drainage to flow into the downstream side. It comprises a check valve consisting of a body and a vertically extending valve seat with which the valve body abuts.
The valve body is arranged in the water-sealed portion and abuts on the valve seat from a substantially horizontal direction, and the valve body hits the valve seat by its own weight in a state where drainage does not flow in from the first inflow port. Contact, block the first flow path ,
The drainage portion is a drainage trap characterized in that it is located below the upper end of the valve seat .

The drainage trap according to claim 1, wherein the check valve is arranged on the upstream side of the lower end of the deodorizing cylinder.

The drain trap according to claim 1 or 2, wherein the valve seat of the check valve is inclined upward by several degrees with respect to the vertical direction. Is.

In the present invention according to claim 4, the drain trap is
The drain trap according to any one of claims 1 to 3, further comprising a noise preventing mechanism for preventing noise during operation of the check valve.

According to the first to third aspects of the present invention, by providing the check valve inside the deodorizing cylinder, it is possible to prevent the backflow of drainage and to reduce the size of the apparatus.
Further, according to the present invention, by adopting a check valve provided with a swing type valve body, it is possible to secure a drainage flow rate from the upstream side while fully exerting the check flow prevention function.
According to the fourth aspect of the present invention, the muffling member makes it possible to reduce the noise associated with the operation of the check valve.

It is sectional drawing which shows the construction state of the drainage trap of this invention. It is sectional drawing which shows the trap body. It is (a) front view (b) rear view which shows the structure of a valve body. It is a reference figure which shows the flow of the drainage of the 1st channel. It is a reference figure which shows the flow of the drainage of the 2nd channel. It is sectional drawing which shows the other embodiment.

Hereinafter, the drain trap 1 of the present invention will be described with reference to the drawings. It should be noted that the description described below is for facilitating the understanding of the embodiment, and the invention is not limited and understood by this.

Hereinafter, the first embodiment of the present invention will be described with reference to FIGS. 1 to 4.

As shown in FIG. 1, the drain trap 1 according to the present embodiment is attached to the bathroom 100. The bathroom 100 is composed of a washing place pan 101 for washing the body of the user and receiving drainage from the washing place, a bathtub 102, and a bathtub pan 103 on which the bathtub 102 is placed. In the first embodiment described below, the washing place pan 101 is used as equipment, and the bathtub 102 and the bathtub pan 103 are used as other equipment.

As shown in FIG. 1, the drain trap 1 has a trap body 2, a water sealing portion 6, a flange member 7, a deodorizing cylinder 10, and a drain elbow arranged on the bathtub 102 and the bathtub pan 103 side, as shown in FIG. It is composed of 23 and has a first flow path 25 for discharging the drainage from the washing place pan 101 and a second flow path 26 for discharging the drainage from the bathtub 102 or the bathtub pan 103.

As shown in FIG. 2, the trap main body 2 has a bottomed cylinder shape and is box-shaped with openings formed on its upper surface and side surfaces, and a discharge port 3 and a branch pipe portion 4 are formed on its side surface. Has been done. Further, the trap body 2 is provided with a water sealing portion 6 inside.
The opening formed on the upper surface of the trap body 2 has a female screw portion threaded on the inner circumference thereof, and is screwed to a flange member 7 described later via a packing and a washing place pan 101.
The discharge port 3 is an opening for discharging the drainage that has flowed into the trap main body 2 to the pipe on the downstream side, and the pipe on the downstream side is further adhered.
The branch pipe portion 4 is an opening formed on the side surface facing the discharge port 3, and extends in a cylindrical shape toward the upstream side, and the end portion of the drainage elbow 23, which will be described later, is adhered to the branch pipe portion 4. Therefore, in the present embodiment, the first flow path 25 and the second flow path 26 communicate with each other through the branch pipe portion 4, and the drainage from the second flow path 26 flows into the drain trap main body 2 and the first flow path 25 It has a structure that merges with.
The water-sealing portion 6 is a space capable of storing drainage inside, and in the present embodiment, the water-sealing portion 6 is formed by erecting the water-sealing wall 5 upward from the bottom surface of the trap body 2. Here, as described above, the trap body 2 communicates with the drainage elbow 23 through the branch pipe portion 4. Therefore, the drain trap 1 of the present invention can store drainage in a part of the drain elbow 23 and the trap main body 2 to form a sealing water, and the first flow path 25 and the second flow path 26 seal the water. Sharing.

The flange member 7 has a cylindrical shape, and is composed of an outward flange-shaped portion formed at the upper end thereof and a tubular portion extending below the flange-shaped portion. A male screw portion is engraved on the outer periphery of the tubular portion, and is screwed to the trap body 2 via a packing and a washing place pan 101. Further, an inward step portion 8 and a protrusion 9 extending inward in the middle are formed on the inner circumference of the tubular portion. The outer circumference of the flange-shaped portion has a larger diameter than the mounting hole of the washing place pan 101, but the outer circumference of the tubular portion has a smaller diameter than the mounting hole, and the lower surface of the flange-shaped portion and the trap body 2 The peripheral edge of the mounting hole is sandwiched between the upper surface and the upper surface of the mounting hole. A deodorant cylinder 10 to be described later is placed on the stepped portion 8, and the outer periphery of the deodorant cylinder 10 is engaged with the protrusion 9 to hold the deodorant cylinder 10. Further, the upper end of the flange member 7 functions as an inlet (first inlet 27) of the first flow path 25, and the drainage generated on the washing place pan 101 flows into the flange member 7.

The deodorant cylinder 10 is a cylindrical member that forms a drainage flow path inside, and is composed of a reduced diameter portion 11, a bent portion 12, and a discharge portion 13, and is formed at a boundary portion between the bent portion 12 and the discharge portion 13. A check valve 14 is provided.
The diameter-reduced portion 11 gradually reduces in diameter toward one inner wall as it goes downstream from the upper end of the deodorizing cylinder 10, and is continuous with the bent portion 12. As shown in FIG. 2, at the lower end of the reduced diameter portion 11, the cross-sectional area of the legs of the drainage flow path in the deodorizing cylinder 10 is about 1/2.
The bent portion 12 is a bent portion formed from the lower end of the reduced diameter portion 11 to the bottom surface of the deodorizing cylinder 10, and the flow direction of the inflowing drainage is substantially horizontal in the bent portion 12.
The discharge portion 13 is a downstream end portion of the deodorant cylinder 10, and in the discharge portion 13, the flow direction of the drainage flowing from the bent portion 12 is substantially vertical from the substantially horizontal direction, and is discharged to the water sealing portion 6. .. The lower end of the discharge portion 13 (lower end of the deodorant cylinder 10) is arranged between the bottom surface of the water sealing portion 6 (bottom surface of the trap body 2) and the upper end of the water sealing wall 5. Therefore, the deodorant cylinder 10 is arranged indoors from the downstream side by arranging the lower end in the sealed water stored in the water sealing portion 6 to fill a part of the first flow path 25 with water (water sealing). It forms a trap function to prevent odors and pests from invading the water.

The check valve 14 is inside the deodorant cylinder 10, is composed of a valve seat 15 and a valve body 16, is arranged between the bent portion 12 and the discharge portion 13, and drainage from the downstream side, odor, pests, etc. flow back. It has a backflow prevention function to prevent.
The valve seat 15 is a contact portion of the valve body 16 formed in the flow path of the deodorant cylinder 10, and is arranged at the center of the deodorant cylinder 10. Further, the valve seat 15 is inclined several degrees with respect to the vertical direction, and the valve body 16 comes into contact with the valve seat 15 to block the drainage flow path inside the deodorizing cylinder 10.
The valve body 16 is composed of a substantially rectangular plate-shaped portion 17 and a shaft portion 19 formed at the upper end of the plate-shaped portion 17, and rotates with the inflow of drainage from the upstream side. It is a swing-type check valve 14 that allows the water to be turned, and is made of a hard resin material having a higher specific gravity than water. The plate-shaped portion 17 is a plate body having a function of closing the first flow path, and a convex portion 18 is projected on the side surface of the plate-shaped portion 17. Further, a sound deadening member 20 is fitted around the plate-shaped portion 17, and a concave portion 21 of the sound deadening member 20 is engaged with the convex portion 18. The shaft portion 19 is a cylindrical shaft extending in the side surface direction at the upper end of the valve body 16, and is rotatably held in the deodorizing cylinder 10.
Here, the valve seat 15 extends in the direction perpendicular to the cross-sectional view, and the valve body 16 is in contact with the valve seat 15 from a substantially horizontal direction. Although the valve seat 15 is described as "substantially vertical in cross section", as described above, the valve seat 15 has an inclined surface. Therefore, although it is described that "the valve body 16 is in contact with the valve seat 15 from a substantially horizontal direction", the valve body 16 is actually in contact with the valve seat 15 in a state of being tilted several degrees. The valve body 16 comes into contact with the valve seat 15 due to its own weight in a state where drainage does not flow in from the first inflow port 27, and blocks the first flow path 25.

The sound deadening member 20 is made of a soft material such as rubber or silicon or an elastic material, and is fitted around the plate-shaped portion 17. Further, the sound deadening member 20 is fitted around the plate-shaped portion 17 of the valve body 16, and the concave portion 21 formed on the inner surface engages with the convex portion 18 to prevent the sound deadening member 20 from being detached. In the state where the muffling member 20 is fitted, as shown in FIG. 3A, the entire surface of the plate-shaped portion 17 (the side in contact with the valve seat 15) is covered with the muffling member 20. As shown in 3 (b), the outer edges of the three sides of the back surface of the plate-shaped portion 17 excluding the upper side are covered with the sound deadening member 20.
Here, since the entire surface of the plate-shaped portion 17 of the valve body 16 is covered with the sound deadening member 20, the sound deadening member 20 is arranged at the contact point between the valve body 16 and the valve seat 15. Further, since the outer edges of the three sides of the back surface of the plate-shaped portion 17 are covered with the sound deadening member 20, the contact between the valve body 16 and the inner peripheral surface of the deodorizing cylinder 10 when the valve body 16 rotates. The sound deadening member 20 is also arranged at the location. That is, in the present invention, when the valve body 16 comes into contact with the valve seat 15 and the deodorizing cylinder 10, it always comes into contact with the sound deadening member 20.

The first plate 22 is a circular shape attached to the first inflow port 27, which is arranged above the deodorizing cylinder 10, and is a mesh-like collecting portion for collecting hair and the like in the drainage generated on the washing place pan 101. have.

The drainage elbow 23 is a pipe having a substantially L-shaped side view, and a second inflow port 28 into which drainage from the bathtub 102 and the bathtub pan 103 flows in is open on the upstream side, and the second inflow port 28 has an opening. The second plate 24 is attached. Further, the drainage elbow 23 is connected to the branch pipe portion 4 of the trap main body 2 at the downstream end portion, and the drainage flowing from the second inflow port 28 is discharged into the trap main body 2 through the branch pipe portion 4. ..

In the center of the second plate 24, a pipe continuous from the drain port of the bathtub 102 is connected to the center, and a notch through which the drainage from the bathtub pan 103 flows is formed around the opening. A float-type check valve is arranged on the back surface (lower surface) of the second plate 24 to prevent drainage from the downstream side from flowing back to the bathtub pan 103 side.

The drain trap 1 has a first flow path 25 through which drainage from the washing place pan 101 flows, and a second flow path 26 through which drainage from the bathtub 102 and the bathtub pan 103 flows. Hereinafter, the flow of drainage flowing through the first flow path 25 and the second flow path will be described.

First, as shown in FIG. 4, when drainage is generated on the washing place pan 101, the drainage passes through the first plate 22 and passes through the reduced diameter portion 11 in the deodorizing cylinder 10 from the first inflow port 27. It flows into the bent portion 12. At this time, the flow direction of the inflowing drainage is bent by about 90 degrees by the bent portion 12, and the flow is substantially horizontal. Then, the drainage flowing in the substantially horizontal direction comes into contact with the valve body 16 attached to the valve seat 15. At this time, since water pressure is applied to the valve body 16 in a direction away from the valve seat 15, the valve body 16 rotates around the shaft portion 19 to open the first flow path 25. At this time, the bottom of the plate-shaped portion 17 of the valve body 16 rotated by the water force may come into contact with the inner wall of the deodorizing cylinder 10 (inner wall of the discharge portion 13), but as described above, the back surface of the plate-shaped portion 17 Since the outer edges of the three sides of the wall are covered with the muffling member 20, the noise when the valve body 16 and the deodorizing cylinder 10 collide is reduced by the muffling member 20.

Then, the drainage obtained by rotating the valve body 16 flows into the discharge portion 13 from the substantially horizontal direction, is bent again in the substantially vertical direction, and is discharged from the lower end of the deodorant cylinder 10 into the water sealing portion 6. .. After that, the drainage passes through the outside of the deodorant cylinder 10, passes over the sealing wall 5, and is discharged to the pipe on the downstream side from the discharge port 3. When the drainage to the first flow path 25 is completed, the valve body 16 rotates by its own weight, comes into contact with the valve seat 15, and closes the first flow path 25 again. As described above, since the surface of the plate-shaped portion 17 is covered with the muffling member 20, the noise when the valve body 16 and the valve seat 15 collide is reduced by the muffling member 20.

Next, as shown in FIG. 5, when drainage is generated on the bathtub 102 and the bathtub pan 103, the drainage passes through the second plate 24 and flows into the drainage elbow 23 from the second inflow port 28. do. The drainage that has flowed into the drainage elbow 23 flows into the trap main body 2 through the branch pipe portion 4, passes over the water sealing wall 5, and is discharged from the discharge port 3.

Here, when a large amount of drainage is generated from the bathtub 102, a part of the drainage flowing into the trap main body 2 from the branch pipe portion 4 (second flow path 26) tends to flow back from the lower end of the deodorizing cylinder 10. However, since the first flow path 25 is blocked by the check valve 14 and the drainage to be backflowed urges the valve body 16 toward the valve seat 15, the check valve 14 is the first flow path 25. It keeps the closed state and the drainage does not flow back.

When the drainage from the first flow path 25 or the second flow path 26 is completed, a part of the drainage that has flowed into the trap body 2 is a part of the trap body 2, the branch pipe part 4, and the drainage elbow 23, that is, the water sealing part. It is stored in 6. At this time, a part of the inside of the deodorant cylinder 10, the deodorant cylinder 10 and the drainage flow path on the outer periphery are filled with water (water-sealed) by the drainage, and a trap function is formed in the first flow path 25. Similarly, the drainage channels of the trap main body 2, the branch pipe portion 4, and the drainage elbow 23 are filled with water (water-sealed) by the drainage, and the trap function is formed in the second channel 26.

When a large amount of drainage flows into the drain trap 1, or when a large amount of drainage flows into the piping on the downstream side of the drain trap 1, the drain flow path in the drain trap 1 may become negative pressure. be. At this time, the valve body 16 rotates due to the pressure difference between the upstream side and the downstream side of the check valve 14, and the valve body 16 repeatedly opens and closes, and the valve body 16 moves to the inner wall of the valve seat 15 and the deodorizing cylinder 10 (the discharge portion 13). Collide with the inner wall). However, as described above, in the present invention, the sound deadening member 20 is arranged as a noise prevention mechanism at the contact points between the valve body 16 and the valve seat 15 and the contact points between the valve body 16 and the inner wall of the deodorizing cylinder 10. ing. Therefore, since the valve body 16 collides with the inner wall of the valve seat 15 and the deodorizing cylinder 10 via the muffling member 20, the muffling member 20 reduces the noise at the time of collision.

In the present invention, the check valve 14 is arranged inside the deodorizing cylinder 10, so that the total height of the drain trap 1 can be suppressed. Further, in the check valve 14, the valve seat 15 extends in the direction perpendicular to the cross-sectional view, and the valve body 16 is in contact with the valve seat 15 from a substantially horizontal direction. Therefore, since it is possible to secure a large flow path area in the check valve 14 portion, it is possible to maintain a suitable drainage flow rate.

The drain trap of the present invention is described above, but the present invention is not limited to the shape of the first embodiment, and various modifications may be made without departing from the gist of the invention. For example, in the first embodiment, the washing place pan 101 is used as equipment and the bathtub 102 and the bathtub pan 103 are used as other equipment, but the bathtub 102 may be used as equipment and the bathtub pan 103 may be used as other equipment. In addition, in a sink having two sinks called a so-called double sink, one sink may be used as equipment and the other sink may be used as other equipment, and the washbasin may be used as equipment and the overflow pipe may be used as other equipment. It may be adopted for the equipment of.
Further, in the first embodiment, the noise reduction member 20 made of rubber or silicon is fitted to the valve body 16 to reduce the noise when the check valve 14 is operated, but the material of the sound deadening member 20 is the above. The material is not limited to this, and a material having the same effect such as foamed resin may be used. Further, in order to reduce the noise when the check valve 14 is operated, in addition to fitting the sound deadening member 20 to the valve body 16, the valve body 16 may be urged toward the valve seat 15 by using a spring or a weight. It is also good, and noise may be reduced by eliminating the pressure difference between the upstream side and the downstream side of the check valve 14 by opening the ventilation portion in the valve body 16.
Further, the valve body 16 of the check valve 14 is a swing type check valve 14 that rotates with the inflow of drainage from the upstream side and allows the drainage to flow in from the downstream side, but is a float type check valve. A check valve such as the above may be adopted.
Further, regarding the second flow path 26, in the above embodiment, the branch pipe portion 4 is provided in the side surface direction of the trap main body 2, and the branch pipe portion 4 is provided on the downstream side of the check valve 14 from the second inflow port 28. Although it was configured to allow wastewater to flow in, the present invention is not limited to the above embodiment. That is, as in the other embodiment shown in FIG. 6, the pipe body to be the second inflow port 28 is configured to be inserted from above the first inflow port 27 to the downstream side of the check valve 14 in the deodorizing cylinder 10. It doesn't matter. In this way, the piping layout can be freely changed as needed.

1 Drain trap 2 Trap body 3 Drain port 4 Branch pipe part 5 Water seal part 6 Water seal part 7 Flange member 8 Step part 9 Protrusion part 10 Deodorant cylinder 11 Reduced diameter part 12 Bending part 13 Drain part 14 Check valve 15 Valve seat 16 Valve body 17 Plate-shaped part 18 Convex part 19 Shaft part 20 Silent member 21 Concave part 22 First plate 23 Drainage elbow 24 Second plate 25 First flow path 26 Second flow path 27 First inflow port 28 Second inflow port 100 Bathroom 101 Washing area bread 102 Bathtub 103 Bathtub bread

Claims (4)

The first flow path through which drainage from equipment flows in,
The second channel through which drainage from other equipment flows in,
A water seal that stores part of the wastewater,
The first flow path includes a first inlet as an inlet for drainage.
The first flow path has a deodorizing cylinder whose lower end is arranged in the water-sealed portion and which forms a water-sealed state in combination with the water-sealed portion.
The deodorant cylinder has a bent portion that directs the flow direction of the drainage that has flowed in from the first inflow port in a substantially horizontal direction, and a discharge portion that discharges the drainage that has flowed in from the bent portion in a substantially vertical direction. A swing-type valve that prevents backflow of drainage from the downstream side between the bent portion and the discharge portion, and rotates with the inflow of drainage from the upstream side to allow the drainage to flow into the downstream side. It comprises a check valve consisting of a body and a vertically extending valve seat with which the valve body abuts.
The valve body is arranged in the water-sealed portion and abuts on the valve seat from a substantially horizontal direction, and the valve body hits the valve seat by its own weight in a state where drainage does not flow in from the first inflow port. Contact, block the first flow path ,
The drain trap is characterized in that the drain portion is located below the upper end of the valve seat . The drain trap according to claim 1, wherein the check valve is arranged on the upstream side of the lower end of the deodorizing cylinder. The drain trap according to claim 1 or 2, wherein the valve seat of the check valve is inclined upward by several degrees with respect to the vertical direction. The drain trap
The drain trap according to any one of claims 1 to 3, further comprising a noise preventing mechanism for preventing noise during operation of the check valve.

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