JP2023091447A - Drain trap and drainage device - Google Patents

Abstract

To provide a drain trap that is less likely to cause water leakage.SOLUTION: A drainage trap 1 comprises: a body part 4 that is provided between a drain port 210 and a drain pipe 220 and has a bottom with a drainage hole 44 formed therein in the form of a bottomed cylindrical shape; a connection pipe part 5 that extends downward from the bottom part 42 and is connected to the drain pipe 220; a water sealing tube 6 that extends from a peripheral edge of the drain hole 44 toward an upper part of the body part and can store sealed water in the bottom part; and an extension pipe 7 that extends downward from the water sealing tube 6, has an outer diameter smaller than an inner diameter of the connection pipe part 5, and can be inserted into the drain pipe 220.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to drainage traps and drainage devices.

BACKGROUND ART Conventionally, drain outlets of kitchens, sinks, etc. are connected to drain pipes for drainage. A substantially cylindrical drain trap with a bottom is arranged between the drain port and the drain pipe. It is known that the drain trap is attached to the outside of the drain pipe, and the overlapped portion of the drain trap and the drain pipe is connected by fastening with a nut (see, for example, Patent Document 1).

JP-A-2002-13175

If the nut is loosely tightened, water may leak from between the drain trap and the drain pipe.

The present disclosure includes a body portion provided between a drain port and a drain pipe and having a drain hole formed in the bottom portion of a bottomed tubular shape, and a connection pipe portion extending downward from the bottom portion and connected to the drain pipe. a water sealing tube extending from the periphery of the drain hole toward the upper portion of the main body and capable of storing water in the bottom; and an extension pipe insertable inside said drain pipe.

It is a cross-sectional schematic diagram which shows the drainage apparatus of this embodiment. It is a partially enlarged perspective cross-sectional view of the drainage device of the present embodiment.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. As shown in FIG. 1, the drainage device 10 is installed in a drainage facility 200 that spouts and drains hot water, such as a sink of a kitchen or a sink of a washbasin. The drainage device 10 has a drainage trap 1, a lock nut 2, and a V-packing 3 as an elastic member.

As shown in FIG. 1, the drain trap 1 is a member that connects the drain outlet 210 of the drainage facility 200 and the drain pipe 220, and foul odors and pests enter the room from the drain pipe 220 side through the drain outlet 210. to prevent The drain trap 1 has a body portion 4 , a connection pipe portion 5 , a water seal tube 6 , an extension pipe 7 and a bowl lid portion 8 .

The body portion 4 is provided between the drain port 210 and the drain pipe 220 and has a cylindrical shape with a bottom. The body portion 4 has a side wall portion 41 , a bottom portion 42 , an upper opening 43 and a drain hole 44 .

The side wall portion 41 is a side surface of the cylinder, and has a stepped portion while gradually decreasing in diameter from top to bottom. The bottom portion 42 is a flat surface that extends radially inward from the lower end of the side wall portion 41 so as to intersect the extending direction of the side wall portion 41 . The upper opening 43 has an open upper portion facing the bottom portion 42 . Top opening 43 is connected to drain port 210 . The peripheral edge of the upper opening 43 has a screw groove formed on the outer peripheral side, and has a mouthpiece 431 connected to the drainage equipment 200 with a nut or the like. The drain hole 44 is a through hole formed in the center side in the radial direction of the bottom portion 42 . Via the drain hole 44 , the interior of the main body 4 and the drain pipe 220 communicate with each other.

The connecting pipe portion 5 is a substantially cylindrical portion extending downward from the bottom portion 42 of the main body portion 4, as shown in FIG. The connecting pipe portion 5 is a portion connected to the outside of the drain pipe 220, and has an inner diameter larger than the outer diameter of the drain pipe 220. The connecting pipe portion 5 has a thread groove 51 and an inclined surface 52. . The thread groove 51 is formed on the outer periphery of the connecting pipe portion 5 and is formed so as to be engageable with a lock nut 2, which will be described later. The inclined surface 52 is a flat surface that slopes upward from the outer peripheral side toward the inner peripheral side at the lower end portion of the connection pipe portion 5 . A V-packing 3, which will be described later, abuts against the inclined surface 52. As shown in FIG.

The water sealing tube 6 is a cylindrical portion that extends upward from the peripheral edge of the drain hole 44 of the main body 4 so as to stand upright. The water seal tube 6 has a water seal tube side wall portion 61 and a water seal tube opening 62 . The water sealing tube side wall portion 61 extends vertically on the center side of the main body portion 4 . The height of the water sealing tube side wall portion 61 is, for example, less than half the height of the main body portion 4 . The water seal tube 6 extends upward inside the main body 4 so that the water seal can be stored between the water seal tube side wall portion 61 , the side wall portion 41 of the main body portion 4 , and the bottom portion 42 . The water seal opening 62 is below the upper opening 43 of the main body 4 and opens upward.

The extension pipe 7 is a cylindrical portion that is molded integrally with the water seal tube 6 and extends downward from the lower end of the water seal tube 6 . The inner peripheral surface of the extension pipe 7 and the inner peripheral surface of the water sealing tube 6 are continuous without a step. The extension pipe 7 has an outer diameter smaller than the inner diameter of the connecting pipe portion 5 and is arranged inside the connecting pipe portion 5 . A gap S<b>1 is formed between the outer peripheral surface of the extension pipe 7 and the inner peripheral surface of the connection pipe portion 5 . As shown in FIG. 1, the upper end of the drain pipe 220 can be inserted into the gap S1, and the extension pipe 7 is inserted into the drain pipe 220 so as to overlap the upper part of the drain pipe 220. . On the outer periphery of the extension pipe 7, an upper portion of the drain pipe 220, a V-packing 3 described later, a connecting pipe portion 5, and a lock nut 2 described later are arranged in order radially outward. The vertical dimension of the extension pipe 7 is not particularly limited. The length of the extension tube 7 can be exemplified to be about 20 mm, for example.

As shown in FIG. 1, the bowl lid portion 8 has a substantially U-shaped cross section and is shaped like a bowl lid that opens downward. The bowl lid portion 8 is arranged so as to cover the upper portion of the sealed water tube 6 . Since the water sealing cylinder opening 62 is lightly closed by the bowl lid part 8, it is possible to prevent bad odors, harmful insects, etc. flowing back from the water sealing cylinder 6 connected to the drain pipe 220 from entering the room.

The lock nut 2 is formed in an annular shape and arranged along the outer circumference of the connecting pipe portion 5 . The lock nut 2 engages with the thread groove 51 of the connecting pipe portion 5 , and fastens the overlapping portion of the upstream end of the drain pipe 220 and the connecting pipe portion 5 from above the connecting pipe portion 5 . The lock nut 2 has a nut side wall portion 22 , a nut upper through hole 23 a, a nut lower through hole 23 b, and a nut bottom portion 24 .

The nut side wall portion 22 is a portion that extends vertically along the outer peripheral surface of the connecting pipe portion 5 . A thread groove 21 that engages with the thread groove 51 of the connecting pipe portion 5 is formed on the inner peripheral surface of the nut side wall portion 22 .

The nut upper through-hole 23a is a substantially circular through-hole formed on the upper end side when the connecting pipe portion 5 is fastened. The diameter of the nut upper through-hole 23 a is larger than the outer shape of the connecting pipe portion 5 . The nut lower through-hole 23b is a substantially circular through-hole formed on the lower end side when the connecting pipe portion 5 is fastened. The diameter of the nut lower through-hole 23 b is larger than the outer diameter of the drain pipe 220 and smaller than the outer shape of the connecting pipe portion 5 .

The nut bottom surface portion 24 is a flat portion extending radially inward of the lock nut 2 from the lower end of the nut side wall portion 22 . A nut lower through-hole 23b is formed on the center side of the nut bottom surface portion 24 .

The V-packing 3 is an annular elastic body that can be arranged on the inner peripheral side of the lock nut 2, and is made of rubber or the like, for example. The V-packing has a packing side portion 31 , a packing lower surface 32 , a packing inclined surface 33 , and a packing through-hole 34 .

The packing side portion 31 is arranged inside the nut side wall portion 22 so as to face the nut side wall portion 22 . The packing side portion 31 is a cylindrical tube portion extending in the vertical direction. The inner peripheral surface of the packing side portion 31 is fitted into the outer peripheral surface of the drain pipe 220 so as to be in close contact therewith. The packing lower surface 32 is arranged on the nut bottom surface portion 24 of the lock nut 2 with the V-packing 3 arranged on the inner peripheral side of the lock nut 2 . The packing inclined surface 33 is a surface that slopes upward from the upper end of the outer peripheral surface side of the packing side portion 31 toward the upper end of the inner peripheral surface side. The packing inclined surface 33 is arranged so as to be in contact with the inclined surface 52 of the connecting pipe portion 5 . The packing through hole 34 is a through hole formed inside the packing side portion 31 . The inner diameter of the packing through-hole 34 matches the outer diameter of the drain pipe 220 so that it can come into contact with the outer peripheral surface of the drain pipe 220 .

The flow of wastewater in the drainage device 10 using the drainage trap 1 of this embodiment will be described. As shown in FIGS. 1 and 2, the lock nut 2 accommodates the V-packing 3 inside, and the packing inclined surface 33 of the V-packing 3 and the inclined surface 52 of the connecting pipe portion 5 are aligned to form the packing inclined surface 33. is fastened so as to block the gap S2 formed between the outer peripheral surface of the drain pipe 220 and the inner peripheral surface of the connecting pipe portion 5. As shown in FIG. Here, if the lock nut 2 is loosely tightened, if the extension pipe 7 is not formed, some of the water running down the lower end of the water sealing tube 6 and the upper end of the drain pipe 220 will flow. , there is a concern that the water may leak from the upper end of the drain pipe 220 to the outside of the drain pipe 220 through the gap S2 between the drain pipe 220 and the connecting pipe portion 5 . It is conceivable that the water that has leaked out of the drain pipe 220 may seep out from the lock nut 2 and leak. However, in this embodiment, the extension pipe 7 extends downward from the lower end of the water sealing tube 6 and is inserted into the drain pipe 220 . Therefore, the water that has fallen along the water sealing tube 6 as shown by the arrow in FIG.

According to this embodiment, the following effects are achieved. The drain trap 1 is provided between a drain port 210 and a drain pipe 220, and includes a main body portion 4 having a cylindrical bottom portion with a drain hole 44 formed therein, and a bottom portion 42 extending downward from the bottom portion 42 and connected to the drain pipe 220. a water sealing tube 6 extending from the periphery of the drain hole 44 toward the top of the main body 4 and capable of storing water in the bottom 42; and an extension pipe 7 having an outer diameter smaller than the inner diameter and capable of being inserted into the drain pipe 220 . Since the extension pipe 7 extends downward from the water sealing cylinder 6 and is inserted into the drain pipe 220, the water that has fallen down the water sealing cylinder 6 flows along the extension pipe 7 to the drain pipe. It flows inside 220. Therefore, even if there is a gap between the connecting pipe portion 5 and the drain pipe 220, the waste water flows into the drain pipe 220 along the extension pipe 7, so that water hardly leaks from the gap. Occurrence can be prevented or suppressed. For example, when the drain trap 1 is constructed, there may be a case where the lock nut 2 is loosely tightened, but even in such a case, water leakage is prevented. can do.

According to this embodiment, the water sealing tube 6 and the extension tube 7 are integrally molded. By integrally forming the water sealing tube 6 and the extension pipe 7, manufacturing and construction work are facilitated, and at the same time, since no seams or the like are formed between the water sealing tube 6 and the extension pipe 7, drainage flows smoothly. can make it fall.

According to this embodiment, the inner peripheral surface of the water seal tube 6 and the inner peripheral surface of the extension pipe 7 are made continuous without a step. As a result, it is possible to smoothly run down the drainage, and the same effect as described above can be obtained.

According to this embodiment, the gap S1 into which the drainage pipe 220 can be inserted is formed between the inner peripheral surface of the connection pipe portion 5 and the outer peripheral surface of the extension pipe 7 . Accordingly, by inserting the upper end of the drain pipe 220 into the gap S1, the drain trap 1 can be easily attached to the drain pipe 220, and water leakage can be prevented or suppressed.

According to this embodiment, the drainage device 10 includes the above-described drainage trap 1, the lock nut 2 arranged along the outer circumference of the connection pipe portion 5 connected to the outside of the drainage pipe 220, and the lock nut 2 A V-packing 3 that is arranged on the peripheral side and closes the gap S1 between the drain pipe 220 and the connection pipe portion 5 is included. When the connection pipe portion 5 was fastened to the drain pipe 220 with the lock nut 2, the lock nut 2 was loosely fastened, and the V-packing 3 could not bring the drain pipe 220 and the connection pipe portion 5 into close contact. Even in such a case, water leakage can be prevented or suppressed by using the drain trap 1 described above.

The present disclosure is not limited to the above-described embodiments, and includes modifications, improvements, and the like within a range that can achieve the purpose of the present disclosure. In the above-described embodiment, the extension pipe 7 is not in contact with the drain pipe 220, and the state in which the gap S1 is formed between the extension pipe 7 and the inner peripheral surface of the drain pipe 220 is illustrated. However, the extension pipe 7 may be in contact with the inner peripheral surface of the drain pipe 220 . The extension pipe 7 may be inserted inside the inner peripheral surface of the drainage pipe 220 regardless of whether the thickness of the drainage pipe 220 is thick or thin.

1 Drain Trap 2 Lock Nut 3 Elastic Member 4 Body Part 5 Connection Pipe Part 6 Water Seal Tube 7 Extension Pipe 10 Drain Device 42 Bottom Part 44 Drain Hole 210 Drain Port 220 Drain Pipe

Claims (5)

a body portion provided between the drain port and the drain pipe and having a drain hole formed in the bottom portion of the bottomed cylindrical body;
a connecting pipe portion extending downward from the bottom portion and connected to the drain pipe;
a water seal tube extending from the periphery of the drain hole toward the top of the main body and capable of storing seal water in the bottom;
an extension pipe that extends downward from the water sealing tube, has an outer diameter smaller than the inner diameter of the connecting pipe portion, and is insertable into the drain pipe. 2. The drain trap according to claim 1, wherein said water sealing tube and said extension tube are integrally molded. 3. The drain trap according to claim 1, wherein the inner peripheral surface of said water sealing tube and the inner peripheral surface of said extension pipe are continuous without steps. The drainage according to any one of claims 1 to 3, wherein a gap into which the drainage pipe can be inserted is formed between the inner peripheral surface of the connection pipe portion and the outer peripheral surface of the extension pipe. trap. A drainage trap according to any one of claims 1 to 4;
a lock nut arranged along the outer periphery of the connecting pipe portion connected to the outside of the drain pipe;
and an elastic member disposed on the inner peripheral side of the lock nut and closing a gap between the drain pipe and the connecting pipe portion.

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