JP2022134229A - Drain pipe joint - Google Patents

Abstract

To provide a drain pipe joint that is made from synthetic resin but enables improvement of a drainage capacity and prevention of back flow to a horizontal branch pipe.SOLUTION: A drain pipe joint 1 includes an upper connection member 10 and a lower connection member 30 that are coupled to an upper part of a joint member 20 and a lower part of the joint member 20, respectively. The upper connection member 10 comprises a guide pipe 12 having an upper revolving blade 16 for applying revolving force to drainage water. The lower connection member 30 is a cylindrical body whose whole body has a funnel shape having a diameter reducing as it goes downward, and comprises a lower revolving blade 31 for mainly receiving drainage water guided by the upper revolving blade 16 and applying revolving force thereto. The joint member 20 is formed so as to have a diameter slightly larger than that of the guide pipe 12 and receives internal fitting of the guide pipe 12. A lower end of the guide pipe 12 is formed so as to be positioned below an upper part of a horizontal branch pipe HT connected to the joint member 20, and a lower end of the upper revolving blade 16 is formed so as to be formed above a lower end edge of the guide pipe 12.SELECTED DRAWING: Figure 10

Description

The present invention relates to a drain pipe joint installed in buildings and structures such as collective housing, hotels, and office buildings.

Drainage pipe joints are usually embedded in the floor slab in the middle of the vertical drainage pipe that penetrates vertically through a high-rise building. , a lower connecting member to which the vertical pipe is connected at the bottom, and a joint member to which the horizontal branch pipe is connected in the middle of these three members, so that the shape can be molded with synthetic resin. is known (Patent Document 1).

Inside such a drain pipe joint, a swirl vane is provided to give swirl to the flowing waste water, thereby swirling the waste water and forming an air core at the center of the swirl to prevent fluctuations in the pressure inside the pipe. to improve drainage capacity.

Further, by forming the inner diameter of the joint member of the intermediate portion to be large, high drainage capacity can be expected without reducing or disappearing the air core even if drainage from the lateral branch pipe occurs.

Furthermore, by protruding backflow prevention plates extending in the longitudinal direction of the joint member from the inner wall of the pipe located on both sides of the opening of the connecting portion of the horizontal branch pipe in the joint member, the waste water can be prevented from flowing back to the horizontal branch pipe. can be prevented.

In such a drain pipe joint, the position of the upper blade, the position of the lower blade, etc. are devised to improve the drainage capacity.

JP 2011-117133

By the way, in such a drainage pipe joint, it is possible to integrally mold it with a synthetic resin, and it is possible to achieve weight reduction and slimming. There is also a problem that the backflow prevention to the is not sufficient.

In particular, regarding the drainage capacity, as described in Patent Document 1, the inner diameter of the upper and lower straight cylinder parts is 100 mm, the inner diameter of the intermediate part is 120 mm, the inner diameter of the branch pipe connection port is 77 mm, and the total length is designed to be 617 mm. The drainage capacity for is 7.5 liters/sec.

In addition, the drain pipe joint of Patent Document 1 is a so-called two-port type drain pipe joint with two horizontal branch pipes, so that another horizontal branch pipe can be connected to this drain pipe joint. There is a concern that if there are three outlets, the drainage capacity will drop, and the backflow to the lateral branch pipes will increase.

However, as buildings become taller in recent years, there is a demand for improved drainage capacity of drain pipe joints. be.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a drain pipe joint which is made of synthetic resin and which is capable of further improving drainage capacity and preventing backflow to lateral branch pipes.

In order to solve the above-mentioned problems, the invention of claim 1 provides an upper connecting member to which the standpipe arranged above is connected, a lower connecting member to which the standpipe arranged below is connected, and a slab. and a joint member to which a lateral branch pipe disposed inside is connected, wherein the upper connection member is connected to the upper part of the joint member, and the lower connection member is connected to the lower part of the joint member. In the joint, the upper connection member has a guide pipe having an upper swirl vane that imparts a swirling force to the waste water flowing in the pipe, and the lower connection member has a funnel shape whose diameter decreases as it goes downward. The cylindrical body has a lower swirl vane that mainly receives the drainage guided to the upper swirl vane and further provides a swirling force, and the joint member is formed to have a diameter one size larger than that of the guide pipe. so that the lower end of the guide pipe is located below the upper portion of the lateral branch pipe connected to the joint member, and the lower end of the upper swirl vane is formed above the lower edge of the guide pipe. It is characterized by

The invention according to claim 2 is the drain pipe joint according to claim 1, wherein the guide pipe includes a cylindrical guide body and an outer cover covering the guide body at a substantially central portion in the length direction of the guide body. The upper portion of the outer cylindrical body gradually decreases in diameter as it goes upward and is integrally joined to the guide body, and the joint member is fitted with the outer cylindrical body.

According to the first aspect of the invention, the joint member is formed to have a diameter one size larger than that of the guide pipe so that the guide pipe fits therein, and the lateral branch connects the lower end of the guide pipe to the joint member. Since the upper swirl vane is positioned below the upper part of the pipe and the lower end of the upper swirl vane is formed above the lower edge of the guide pipe, the vertical pipe flow turned into a swirling flow by the upper swirl vane is transferred to the horizontal branch pipe HT. It is prevented from jumping out in the direction, and the backflow to the lateral branch pipe HT is prevented.

That is, since centrifugal force is applied to the vertical pipe flow turned into a swirling flow by the upper swirl vane, if the lower end of the upper swirl vane and the lower end of the guide body are at the same position, the inner peripheral surface of the guide body The swirl flow away from the guide pipe flies out in the direction of the lateral branch pipe (outward) and becomes a flow that flows back into the lateral branch pipe. , the standpipe flow flows downward while swirling on the inner peripheral surface of the guide body, is prevented from flying out in the direction of the lateral branch pipe, and can be prevented from flowing back to the lateral branch pipe.

According to the invention of claim 2, the guide pipe has a double structure of the guide main body and the outer cylindrical body, and the joint member is fitted with the outer cylindrical body. The opening of the branch and the standpipe flow through the guide pipe can be spaced apart, making it possible to further reduce backflow into the side branch.

This figure shows an embodiment of the present invention together with FIGS. 2 to 23, and is a front view of a drain pipe joint. It is a top view of a drain pipe joint. FIG. 3 is a cross-sectional view taken along line AA of FIG. 2; FIG. 2 is a cross-sectional view taken along line BB of FIG. 1; FIG. 2 is a cross-sectional view taken along line CC of FIG. 1; FIG. 2 is a cross-sectional view taken along line DD of FIG. 1; It is a front view of a guide tube. 4 is a plan view of a guide tube; FIG. It is a right side view of a guide tube. FIG. 10 is a cross-sectional view taken along line EE of FIG. 9; FIG. 9 is a cross-sectional view taken along line FF of FIG. 8; FIG. 9 is a cross-sectional view taken along line GG of FIG. 8; 11 is a cross-sectional view taken along line HH of FIG. 10; FIG. It is a front view of a joint member. It is a top view of a joint member. FIG. 16 is a cross-sectional view taken along line II of FIG. 15; FIG. 17 is a cross-sectional view taken along line JJ of FIG. 16; FIG. 16 is a cross-sectional view taken along line KK of FIG. 15; FIG. 17 is a cross-sectional view along line LL in FIG. 16; It is a top view of a lower connection member. FIG. 21 is a cross-sectional view taken along line MM of FIG. 20; FIG. 21 is a cross-sectional view taken along line NN of FIG. 20; 21 is a cross-sectional view along line OO of FIG. 20; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the illustrated embodiments.

The drain pipe joint 1 includes an upper connecting member 10 that connects the vertical pipe VT arranged above, a joint member 20 that is connected to the lower part of the upper connecting member 10 and connects three horizontal branch pipes HT, and the joint and a lower connecting member 30 which is connected to the lower portion of the member 20 and connects the vertical pipe VT arranged below (see FIG. 1).

The upper connecting member 10, the lower connecting member 30, and the joint member 20 are all made of synthetic resin, and the drain pipe joint 1 is constructed by covering the outer circumference of the inner pipe with fiber-mixed mortar. be done. Note that the fiber-mixed mortar layer is omitted in the following description.

Three horizontal branch pipes HT are connected to the drain pipe joint 1 so as to form a substantially T shape in plan view (see FIG. 2). FIG. 1 is a front view. In FIG. 1, the lateral branch HT located in the front is the central port lateral branch HT, the left lateral branch HT is the left lateral branch HT, and the lateral branch HT located on the right is shown. The pipe HT will be referred to as a right lateral branch pipe HTR, and the left-right direction and front-rear direction in FIG.

In the drain pipe joint 1 according to the embodiment described below, a vertical pipe VT having an inner diameter of about φ100 mm and a horizontal branch pipe HT having an inner diameter of about φ77 mm are connected, respectively, and the joint body 21 of the joint member 20 has an inner diameter of As an example, the diameter is about φ134 mm and the total vertical length is about 720 mm.

The upper connecting member 10 consists of a socket body 11 to which an upper vertical pipe VT is connected and a guide pipe 12 to which a joint member 20 is connected (see FIGS. 1 and 3).

The receptacle body 11 is integrally formed of three cylinders, an upper part 11a, a middle part 11b, and a lower part 11c. , a vertical pipe VT is connected to the upper portion 11a, and a guide pipe 12 is connected to the lower portion 11c. The vertical length of the receptacle 11 is approximately 140 mm.

In addition, the inner diameter of the stand pipe VT, the inner diameter of the middle portion 11b, and the inner diameter of the guide pipe 12 are formed to be substantially the same (for example, φ100 mm). , the vertical pipe VT, the socket body 11, and the guide pipe 12 are formed into a continuous surface so that no steps are formed (see FIG. 3).

If the inner diameter of the vertical pipe VT is slightly larger than the inner diameter of the guide pipe 12, the diameter of the central portion 11b of the socket body 11 may be reduced downward. In any case, the inner peripheral surface of the stand pipe VT, the inner peripheral surface of the middle portion 11b of the socket body 11, and the inner periphery of the guide pipe 12 are connected to each other. It is preferable that the surface is a continuous surface so that no steps are generated.

The guide tube 12 is composed of an entirely cylindrical guide body 13 and an outer tube 14 covering the guide body 13 at a substantially central portion in the length direction of the guide body 13. The upper portion of the outer tube 14 faces upward. It is integrally joined to the guide body 13 with a diameter decreasing as it goes. The vertical length of the guide tube 12 is approximately 220 mm (see FIG. 10).

The length of the outer cylindrical body 14 is about 1/3 (about 70 mm) of the length of the guide body 13, and is formed at a position about 80 mm downward from the upper edge of the guide body 13, so that the lower edge of the guide body 13 is It is located below the lower end of the outer cylindrical body 14 (see FIG. 10).

The lower peripheral edge 13a of the guide body 13 is chamfered so that the outer peripheral surface of the guide body 13 is biased inward as it goes downward, and the inner peripheral surface is formed substantially straight. The diameter is slightly expanded as it goes to the center (see FIGS. 3 and 10).

Drainage flowing down along the inner peripheral surface of the guide body 13 does not flow to the outside, that is, to the side of the lateral branch pipe HT, at the lower end peripheral edge 13a, thus preventing backflow to the lateral branch pipe HT. (See Figure 3). In addition, the lower end peripheral edge 13a of the guide body 13 is not limited to be chamfered, and may be formed into an R surface.

Moreover, as described above, the guide pipe 12 is composed of the tubular guiding body 13 and the outer tubular body 14 covering the guiding main body 13, and the joint member 20 is fitted onto the outer tubular body 14, whereby the joint member The opening end face of the horizontal branch pipe HT connected to 20 can be separated from the inner peripheral surface of the guide body 13 where the vertical pipe flow flows down, so that the backflow to the horizontal branch pipe HT can be further prevented.

An upper outer circumference 14a of the outer cylinder body 14 is formed thicker than an outer cylinder main body 14b below, and a step is formed between the outer cylinder main body 14b and the outer cylinder main body 14b (see FIG. 10).

A projecting portion 15 having a triangular recess 15a for positioning is formed integrally with the upper outer circumference 14a of the outer cylindrical body 14 toward the front (see FIGS. 1 and 7). The side of the drain pipe joint 1 on which the projecting portion 15 is provided is the front.

The inner peripheral surface of the guide body 13 is provided with an upper swirl vane 16 that swirls the waste water flowing down the pipe, and a control guide 17 that prevents the swirled waste water from flowing into the left lateral branch pipe HTL. (See FIGS. 10 and 11).

The upper swirl vane 16 is a semi-arcuate plate body, and the arc portion is joined to the inner peripheral surface of the guide body 13, and the chord portion protrudes toward the center of the guide body 13 so as to extend toward the front side of the guide body 13. (Front side) The upper swirl vane 16 is formed integrally with the inner peripheral surface, and is inclined at approximately 30 degrees with respect to the vertical direction (pipe core), and the chord portion extends in the horizontal direction in plan view. (See FIG. 8).

If the width of the upper swirl vane 16 is too small, the swirling force of the water flowing down will be small. For example, when the inner diameter of the guide body 13 is 100 mm, the width of the upper swirl vane 16 is 30 mm. It should be noted that the "width of the swirl vane" here refers to the dimension of the widest portion of the bow shape.

The upper swirl vanes 16 are formed from a position where the upper end is substantially the same as or slightly below the upper edge of the guide body 13 to a position where the lower end is offset 40 mm above the lower edge of the guide body 13. The vertical length is approximately 180 mm. Further, the upper swirl vane 16 is formed so as to incline from the oblique upper right to the oblique lower left when viewed from the back (see FIG. 10). The lower end of the upper swirl vane 16 extends upward by 40 mm from the lower edge of the guide body 13 , and the inner peripheral surface of the guide body 13 extends 40 mm below the upper swirl vane 16 . The lower inner peripheral surface 13b is a straight cylindrical portion except for the control guide 17 formed thereon.

As a result, when the water flowing down hits the water receiving surface 16a of the upper swirl vane 16, a counterclockwise swirling force is applied to the water in a plan view, and the water flows down (see FIG. 8). Since centrifugal force is applied to this swirl flow, if the lower end of the upper swirl vane 16 and the lower end of the guide body 13 are at the same position, the swirl flow away from the inner peripheral surface of the guide body 13 will be horizontal. Although the flow may flow in the direction of the branch pipe HT (outward) and flow back into the horizontal branch pipe HT, the lower end of the upper swirl vane 16 is formed above the lower edge of the guide body 13 as described above. Therefore, it is prevented from flowing downward while swirling on the inner peripheral surface of the guide body 13 at that portion and jumping out in the direction of the lateral branch pipe HT, thereby preventing backflow to the lateral branch pipe HT.

That is, the above-described position where the lower end of the upper swirl vane 16 deviates 40 mm above the lower edge of the guide body 13 means that the wastewater that hits the upper swirl vane 16 does not flow into the horizontal branch pipe HT, and the lower connection (to be described later) is performed. It is at a height that guides the main lower swirl vane 31 of member 30 .

The control guide 17 is a vertically elongated protrusion protruding from the inner peripheral surface of the guide main body 13 on the back side, and is located at a central angle of 40 degrees in the counterclockwise direction from the front-rear direction around the tube core in plan view. It has a length of about 100 mm in the vertical direction, a thickness of 5 mm, and a protrusion amount of 10 mm from the inner peripheral surface. reference).

The control guide 17 has a flat trapezoidal shape when viewed from the side (circumferential direction), with the upper ⅓ and lower ⅓ in the length direction being inclined surfaces, and the central portion being flat. (See FIG. 11).

In addition, the control guide 17 is positioned at a central angle of 40 degrees counterclockwise from the front-rear direction around the tube core in a plan view, that is, about 220 degrees counterclockwise from the center of the upper swirl vane 16 . It is formed at a position close to the direction (see FIGS. 4 and 8).

Then, the wastewater to which a counterclockwise swirling force is imparted by the upper swirl vane 16 provided on the inner peripheral surface on the front side of the guide body 13 swirls along the inner peripheral surface on the back side and flows down. , tends to radiate out and flow into the left ostial transverse branch HTL. Therefore, by forming the control guide 17 at the position described above, the inflow into the left lateral branch HTL is suppressed (see FIG. 2).

That is, when the swirling force of the waste water is weak, it flows so as to drop down to the joint member 20 and the lower connecting member 30, but the waste water with a certain swirling force flows down while swirling as if crawling on the inner peripheral surface, and flows down to the left. The centrifugal force is large where the oral lateral branch HTL is present, and the fluid flows into the left lateral lateral branch HTL (see FIG. 2).

Therefore, by providing the control guide 17, it is possible to block the drainage toward the left lateral branch HTL even if the drainage is vigorous to some extent, thereby preventing the water from flowing into the left lateral branch HTL ( 2 and 8).

Further, since there is no upper swirl vane 16 above the left lateral branch pipe HTL and there is the control guide 17 as described above, the drainage from the left lateral branch pipe HTL flows down the inner peripheral surface of the guide pipe main body 13. The drainage from the central port horizontal branch pipe HTC and the right side horizontal branch pipe HTR joins the waste water coming from the guide pipe main body 13 and is guided to the sub-lower swirl vane 32 below. It hardly joins the drainage that has flowed down the inner peripheral surface of the joint member 20, and flows down the inner surface of the joint member 20 as it is.

The joint member 20 is a cylindrical body extending in the vertical direction. and a lateral branch tube connecting body provided so as to penetrate and communicate with each of the right side surfaces (see FIGS. 14 and 16).

The joint body 21 has a large-diameter portion 21a formed at its upper end portion to be fitted (coupled) with the outer cylinder body 14b, and a lower end portion formed at its outer peripheral surface with a slightly smaller diameter, It is formed in a thin portion 21c fitted (coupled) to the lower connecting member 30 (see FIGS. 2 and 16).

The joint body 21 is a cylindrical body that is slightly thicker than the guide body 13. For example, when the guide body 13 has an inner diameter of φ100 mm, the joint member 20 has an inner diameter of φ134 mm (see FIG. 2).

A stepped portion 21b is formed between the inner peripheral surface of the large-diameter portion 21a of the joint body 21 and the inner peripheral surface of the joint body 21, and the upper end edge of the large-diameter portion 21a protrudes upward in front of the large-diameter portion 21a. A triangular convex portion 21d is formed, and in order to connect the upper connecting member 10 (guide pipe 12) to the joint member 20 (joint main body 21), the large diameter portion 21a is fitted (coupled) to the outer cylinder main body 14b. When the outer cylinder main body 14b hits the stepped portion 21b, the triangular convex portion 21d is fitted into the triangular concave portion 15a of the projection 15 formed on the upper peripheral edge 14a of the outer cylinder body 14, thereby extending in the circumferential direction. Positioning is performed (see FIG. 1).

A protruding portion 23 having a triangular recess 23a for positioning is formed slightly below the central port lateral branch pipe connecting body 22C of the joint body 21 and above the upper edge of the thin portion 21c, and is integrally provided toward the front. (See FIGS. 1 and 14).

The three lateral branch pipe connecting bodies 22 are short cylinders and are provided substantially in the center of the joint body 21 in the vertical direction, and communicate with the inside of the pipe of the joint body 21 through a through hole 21e formed in the joint body 21. (See FIGS. 16-18).

Each lateral branch pipe connecting body 22 has a base end portion 22a with a small diameter and a connection receiving portion 22b on the distal side from the base end portion 22a with a large diameter, and a step portion 22c is formed on the inner peripheral surface thereof ( See Figure 16).

The lower side of the peripheral edge communicating with the through hole 21e of the base end portion 22a of the lateral branch pipe connector 22 is formed on the R surface 22d. The drainage flows down along the inner peripheral surface of the joint main body 21 without flowing into the lateral branch pipe connector 22 (see FIG. 16).

The inner diameter of the connection receiving portion 22b of the lateral branch pipe connector 22 is formed to be substantially the same as the outer diameter of the lateral branch pipe HT, and the inner diameter of the base end portion 22a is formed to be the same as the inner diameter of the lateral branch pipe HT. When the horizontal branch pipe HT is connected to the connecting body 22, the front edge of the horizontal branch pipe HT hits the stepped portion 22c and is connected, and the inner diameter of the base end portion 22a and the inner diameter of the horizontal branch pipe HT form a continuous surface. , steps are prevented (see FIG. 16).

On the inner peripheral surface of the joint main body 21, four backflow prevention plates 24 consisting of vertically elongated ridges are provided at equal intervals in the circumferential direction, and are shifted by 45 degrees at the center angle with respect to the front-rear direction and the left-right direction in plan view. (See FIG. 3).

The length of the backflow prevention plate 24 in the vertical direction is such that its upper end is positioned at approximately the same level as the lower edge of the large diameter portion 21a of the joint body 21 and its lower end is positioned at the same level as or slightly below the lower edge of the through hole 21e. (See FIGS. 16 and 17).

The amount of protrusion of the backflow prevention plate 24 from the inner peripheral surface of the joint main body 21 is such that the upper half 24a is low and the lower half 24b is high from the center in the vertical direction. It is formed to become lower as it goes downward (see FIG. 18).

Further, the distance between the two counterflow prevention plates 24 facing each other is formed to be substantially the same as the outer diameter of the guide body 13 in the upper half 24a having a small protrusion amount, so that the large diameter portion 21a of the joint body 21 is formed. When fitted (coupled) to the outer tube body 14b of the guide tube 12, the guide body 13 of the outer tube body 14b is sandwiched between the upper halves 24a of the four backflow preventing plates 24 described above.

As a result, at the portion where the joint member 20 and the guide pipe 12 are fitted (coupled), the guide body 13 is positioned inside, and the outer cylindrical body 14 and the joint body 21 are positioned outside. body is composed. Since the waste water flows only into the pipe of the guide body 13 located inside, the waste water is prevented from flowing into the lateral branch pipe HT connected to the lateral branch pipe connector 22 on the outside of the joint body 21 (Fig. 3).

Furthermore, when the large-diameter portion 21a is fitted (coupled) to the outer cylinder main body 14b, the lower edge of the guide main body 13 is positioned at the step between the upper half 24a and the lower half 24b of the backflow prevention plate 24, and this state is achieved. When the interior of the joint body 21 is viewed from each lateral branch pipe connector 22, the lower edge of the guide body 13 is located at a position approximately one-third downward from the vertical upper end of the through hole 21e. there is

Specifically, when the inner diameter of the lateral branch tube HT is φ77 mm, the lower edge of the guide body 13 is located at a position about 15 mm above the core of the lateral branch tube HT.

This means that since the waste water flows down inside the guide body 13, the waste water does not flow into the horizontal branch pipe HT from approximately the upper one-third of the diameter of the horizontal branch pipe HT. can be effectively suppressed.

Moreover, as described above, since the lower end peripheral edge 13a of the guide body 13 that can be seen from each horizontal branch pipe connecting body 22 is chamfered so that the outer peripheral surface thereof is biased inward, the backflow of waste water to the horizontal branch pipe HT is prevented. can be prevented.

The lower connecting member 30 is a funnel-shaped cylindrical body whose diameter decreases downward as a whole, and its upper end portion is formed to have a slightly larger diameter and is fitted to the thin portion 21c of the joint main body 21 of the joint member 20. The large-diameter portion 30a and the lower end of the large-diameter portion 30a serve as a receptacle 30b that connects the standpipe VT arranged below (see FIG. 21).

Two swirl vanes 31 and 32 are provided on the inner peripheral surface of the lower connecting member 30, one of which is a main lower swirl vane 31 with a large vane width and the other is a sub-lower swirl vane 32 with a small vane width, Both are formed integrally with the lower connecting member 30 . For example, when the upper inner diameter of the lower connecting member 30 is φ134 mm and the lower inner diameter is φ100 mm, the width of the main lower swirl vane 31 is about 30 mm, and the width of the sub lower swirl vane 32 is about 20 mm (Fig. 20).

The main lower swirl vane 31 is composed of a semi-arcuate plate-shaped vane body 31a and a base 31b erected from the lower connecting member 30 in order to form the vane body 31a integrally with the lower connecting member 30 (FIG. 23). reference).

The arc portion of the main lower swirl vane 31 is joined to the inner peripheral surface of the lower connecting member 30, and the chord portion protrudes toward the center of the lower connecting member 30. It is provided on the inner peripheral surface of the lower connecting member 30 on the oblique right rear side so that it is slanted at 30 degrees and the string portion is shifted 45 degrees with respect to the horizontal direction in plan view (see FIG. 23).

The sub-lower swirl vane 32 is a semi-arcuate plate body, the arc portion of which is joined to the inner peripheral surface of the lower connecting member 30, the chord portion of which protrudes toward the center of the guide body 13, and extends in the vertical direction (center line). It is formed integrally with the inner peripheral surface of the lower connecting member 30 on the left oblique front side so that it is inclined at approximately 30 degrees with respect to the lower connection member 30 and the string portion is shifted 45 degrees with respect to the left and right direction in plan view ( See Figure 22).

The main lower swirl vane 31 and the auxiliary lower swirl vane 32 have opposite inclinations with respect to the vertical direction. is slanted so that the left end is located at the top and the left end is located at the bottom, and the sub-lower swirl vane 32 is slanted so that the left end is located at the top and the right end is located at the bottom.

Therefore, when manufacturing the lower connecting member 30 by integral molding, since the die is cut in one direction, one (sub-lower swirl vane 32) can be molded into a plate-like blade, but the second (main lower swirl vane) 31) forms a base 31b, and a recess is formed in the outer peripheral surface of the lower connecting member 30 (see FIG. 3).

In addition, a triangular convex portion 30c projecting upward is formed on the front surface of the upper edge of the large diameter portion 30a of the lower connecting member 30 to fit (join) the lower connecting member 30 to the joint member 20. Furthermore, when the large-diameter portion 30a is fitted (coupled) to the thin portion 21c, the triangular projection 30c fits into the triangular recess 23a of the projection 23 formed on the joint body 21, thereby positioning in the circumferential direction. (see Figure 1).

Each member (upper connecting member 10 (receptacle 11, guide pipe 12), joint member 20, lower connecting member 30) configured in this way is assembled as follows, and the positional relationship of each part is as follows. become.

First, the upper connecting member 10 is constructed by fitting (coupling) the upper portion of the guide body 13 of the guide tube 12 to the lower portion 11c of the socket body 11 (see FIG. 3).

Next, the large-diameter portion 21 a of the joint body 21 of the joint member 20 is fitted to the lower portion of the guide body 13 of the upper connecting member 10 . At this time, the triangular convex portion 21 d of the joint main body 21 is fitted into the triangular concave portion 15 a formed in the protruding portion 15 of the guide body 13 . Thereby, the upper connecting member 10 and the joint member 20 are positioned in the circumferential direction (see FIG. 1).

In this state, the upper blade member 16 is positioned on the inner peripheral surface of the guide body 13 on the front side. Since the HTR is located on the right side, it is located above the through-hole 21e through which the upper blade member 16 and the lateral branch pipe HTC of the central opening communicate in plan view (see FIGS. 2 and 3).

Further, the large diameter portion 30 a of the lower connecting member 30 is fitted to the lower portion of the joint member 20 . At this time, the triangular convex portion 30c of the lower connecting member 30 is fitted into the triangular concave portion 23a formed in the protruding portion 23 of the joint main body 21. As shown in FIG. Thereby, the joint member 20 and the lower connecting member 30 are positioned in the circumferential direction, and the positional relationship in the circumferential direction between the upper connecting member 10, the joint member 20, and the lower connecting member 30 is determined (see FIG. 1).

In the drainage pipe joint 1 constructed in this manner, the upper stand pipe VT is connected to the upper portion 11a of the socket body 11 of the upper connecting member 10, and the lower stand pipe VT is connected to the receiving body 30b of the lower connecting member 30. Further, each lateral branch pipe HT is connected to the lateral branch pipe connector 22 of the joint member 20 (see FIG. 1).

Then, when the standpipe flow from the standpipe VT above the drain pipe joint 1 hits the water receiving surface 16a of the upper swirl vane 16 of the upper connecting member 10, a swirling force is applied in the counterclockwise direction in a plan view and downward. Due to the presence of the lower inner peripheral surface 13b, most of it is guided by the main lower swirl vanes 31, hits the main lower swirl vanes 31, and flows down with a further increased swirling force (see FIG. 2).

Of the standpipe flow, the waste water that does not hit the upper swirl vane 16 flows down with a weak swirl force and is guided to the sub-lower swirl vane 32 along the lower inner peripheral surface 13b.

The flow of water flowing along the lower inner peripheral surface 13b of the guide body 13, especially the inner peripheral surface on the back side to which the horizontal branch pipe HT is not connected, hits the control guide 17 and is blocked, and flows into the left lateral branch pipe HTL. inflow is blocked. This is because the drainage flowing along the inner peripheral surface on the back side runs along the lower inner peripheral surface 13b for a long time, and a radial spreading force is generated, and when flowing down from the lower end edge of the guide body 13, it spreads in the radial direction, and the lateral branch pipe Although there is a danger of entering the HT, the control guide 17 can block the drainage likely to go to the left outlet lateral branch HTL (see FIG. 3). In particular, the effect was demonstrated with an increase in the amount of drainage, and the backflow to the left lateral branch HTL was improved, making it possible to take out three lateral branches.

In addition, the lower edge of the guide body 13 is located at a position deviated upward by about 15 mm from the core of the lateral branch tube HT. , the drainage from the guide body 13 is prevented from flowing into the lateral branch pipe HT (see FIG. 3).

As described above, in the drain pipe joint 1 according to the embodiment, the lower end of the guide body 13 is positioned below the upper portion of the horizontal branch pipe HT connected to the joint member 20, and the upper swirl vane Since the lower end of 16 is formed above the lower edge of the guide body 13, the vertical pipe flow turned into a swirling flow by the upper swirl vane 16 is prevented from flying out in the direction of the horizontal branch pipe HT. backflow to the

That is, since centrifugal force is applied to the standpipe flow turned into a swirling flow by the upper swirl vanes 16, if the lower end of the upper swirl vanes 16 and the lower end of the guide body 13 are at the same position, the guide body 13 The swirl flow away from the inner peripheral surface of the upper swirl vane 16 flies out in the direction of the horizontal branch pipe HT (outward) and becomes a flow that flows back to the horizontal branch pipe HT. By forming it above the lower edge of the main body 13, the standpipe flow flows down while swirling on the inner peripheral surface of the guide main body 13, is prevented from jumping out in the direction of the horizontal branch pipe HT, and flows into the horizontal branch pipe HT. Backflow can be prevented.

Moreover, the drain pipe joint 1 according to the embodiment is composed of three members, an upper connection member 10, a joint member 20, and a lower connection member 30, and the shapes of the respective members 10, 20, and 30 can be integrally molded with resin. Because of the shape, the synthetic resin of the drain pipe joint 1 can be realized, and the weight of the drain pipe joint 1 can be reduced.

Moreover, since the swirl vanes 16, 31, and 32 provided on the drain pipe joint 1 are integrally molded, they are superior in strength compared to the conventional swirl vanes manufactured as separate parts and attached later. can be made into something That is, when the blades formed as separate parts are attached to the guide pipe or the like afterward, they may come off or break over time. Life can be extended.

Furthermore, one upper swirl vane 16 is provided on the upper connecting member 10, and a swirling force is applied to the drainage by this upper swirl vane 16, and the two lower swirling vanes 31 and 32 provided on the lower connecting member 30 are the main lower part. It is guided to the swirl vane 31, and the main lower swirl vane 31 gives a stronger swirling force, and most of the wastewater that was not received by the upper swirl vane 16 and was not caught by the main lower swirl vane 31 is also sent to the sub-lower swirl vane. Since 32 receives and gives a swirling force, the drain pipe joint 1 with a high drainage capacity can be obtained.

Improving the drainage capacity also contributes to making the drain pipe joint 1 slimmer and lighter.

Further, in the drain pipe joint 1 according to the embodiment, by providing the two lower swirl vanes 31 and 32 on the funnel-shaped member (lower swirl member 30), a stronger swirl flow can be obtained. Forming the lower swirl member 30 into a funnel shape means narrowing the caliber as it goes downward, and the flow of waste water can be made to run along the inner peripheral surface and the probability of hitting the lower swirl vanes 31 and 32 can be increased. It can increase turning power.

In the drain pipe joint 1 according to the embodiment, the diameter of the joint member 20 is increased, and the guide body 13 is fitted to form a double-structured tubular body, so that the lower end of the guide body 13 is on the side. It can be positioned so as to cover the lateral branch pipe HT when viewed from the side, and the length of the entire drain pipe joint 1 can be shortened. In the above embodiment, the length of the drain pipe joint 1 could be set to approximately 720 mm.

By increasing the drainage capacity of the drain pipe joint 1 in this way, it is possible to achieve the high drainage capacity (10.0 liters/second or more) required for high-rise buildings, etc. It became possible to connect the pipes HTL, and a three-port drain pipe joint 1 was realized.

Although the embodiments of the present invention have been described above, the specific configuration is not limited to the above-described embodiments. Included in the invention. For example, in the above embodiment, the guide tube is composed of a cylindrical guide body and an outer cylinder covering the guide body. It can also be applied to those in which the guide body is directly fitted.

1 drain pipe joint
VT vertical pipe HT horizontal branch pipe 10 upper connecting member 12 guide pipe 13 guide main body (guide pipe)
13a lower end peripheral edge 14 outer cylindrical body 16 upper swirl vane 20 joint member 30 lower connecting member

Claims (2)

An upper connecting member to which the vertical pipe arranged above is connected, a lower connecting member to which the vertical pipe arranged below is connected, and a joint member to which the horizontal branch pipe arranged in the slab is connected. and a drain pipe joint comprising:
The upper connection member comprises a guide pipe having an upper swirl vane that imparts a swirling force to the waste water flowing in the pipe,
The lower connecting member is a funnel-shaped cylindrical body whose diameter decreases as it goes downward, and includes a lower swirl vane that mainly receives the drainage guided by the upper swirl vane and further imparts a swirling force,
the joint member is formed to have a diameter one size larger than the guide pipe and fits the guide pipe inside;
A lower end of the guide pipe is located below an upper portion of the lateral branch pipe connected to the joint member, and a lower end of the upper swirl vane is formed above a lower edge of the guide pipe. drain pipe fittings. The guide tube is composed of a cylindrical guide body and an outer cylinder covering the guide body at a substantially central portion in the length direction of the guide body. diametrically bonded to the guide body,
The joint member is fitted with the outer cylindrical body,
The drain pipe joint according to claim 1, characterized in that:

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