JP2023158256A - Resin joint and drain piping structure - Google Patents

Abstract

To provide a resin joint reduced in possibility of entering of the drain from an upper floor into a horizontal branch pipe by hitting on a projection, while parting the cylindrical water film formed by a drain flow by the projection.SOLUTION: A resin joint 100 includes a body part that has a rising pipe connection part 102 connectable to an upstream rising pipe 200 at an upper end, a horizontal branch pipe connection part 104 connectable to a horizontal branch pipe 400 at a side face, and a lower pipe connection part 103 connectable to a downstream pipe member at a lower end, respectively. In the resin joint 100, on the upstream side of the horizontal pipe connection part 104, six water film cutting projections 150 are formed with 60 degrees intervals on an inner peripheral surface of a rising pipe receiving port 120I connected to the rising pipe connection part 102. The resin joint 100 has a pipe wall 105I formed by extending a roughly cylindrical lower part of the rising pipe receiving port 120I, as a flow-in preventing mechanism preventing flow-in of the drain to the horizontal branch pipe 400 by the projections 150.SELECTED DRAWING: Figure 10

Description

Application for application of Article 30, Paragraph 2 of the Patent Act has been filed Place of delivery: Sanko Valve Fittings Co., Ltd. Head Office Warehouse (12-1 Ishijo-cho, Hakata-ku, Fukuoka City, Fukuoka Prefecture) Date of delivery: April 21, 2021 Place of delivery : Suginaka Kogyo Co., Ltd. (3-1-32 Kitatsumori, Nishinari-ku, Osaka City, Osaka Prefecture) Delivery date: April 23, 2021 Place of delivery: Sanko Valve Fitting Co., Ltd. Kagoshima Branch (Tenpozan-cho, Kagoshima City, Kagoshima Prefecture) 7-4) Delivery date: April 27, 2021 Place of delivery: Takara Tsusho Co., Ltd. Logistics Center (3-2-15 Sangenya Higashi, Taisho-ku, Osaka-shi, Osaka Prefecture) Delivery date: May 2021 Date of delivery: June 24, 2021 Place of delivery: Fuji Kizai Co., Ltd. Misato Logistics Center (1-3-4 Inter Minami, Misato City, Saitama Prefecture) Date of delivery: June 24, 2021 Place of delivery: Sanko Valve Fitting Co., Ltd. Kumamoto Sales (1-3-18 Josuizenji Temple, Chuo-ku, Kumamoto City, Kumamoto Prefecture) Delivery date: July 9, 2021 Location of delivery: Fuji Kizai Co., Ltd. Nishiyodogawa Warehouse (1-3-Momoshima, Nishiyodogawa-ku, Osaka City, Osaka Prefecture) 80) Date of delivery: September 16, 2021 Place of delivery: Musashi Steel Tube Co., Ltd. (2-6-17 Tokaichi-cho, Naka-ku, Hiroshima City, Hiroshima Prefecture) Date of delivery: October 30, 2021 Place of delivery : Create Co., Ltd. Osaka Distribution Center (1-1-25 Kobayashi Higashi, Taisho Ward, Osaka City, Osaka Prefecture) Delivery date: November 1, 2021 Location of delivery: Create Co., Ltd. Osaka Distribution Center (Taisho Ward, Osaka City, Osaka Prefecture) 1-1-25 Kobayashi Higashi) Delivery date: November 26, 2021 Delivery location: Fuji Kizai Co., Ltd. Kanagawa Logistics Center (15-5 Meguro-cho, Seya-ku, Yokohama, Kanagawa Prefecture) Delivery date: 2021 November 30th Place of delivery: Create Co., Ltd. Osaka Distribution Center (1-1-25 Kobayashi Higashi, Taisho-ku, Osaka City, Osaka Prefecture) Delivery date: January 18, 2020 Place of delivery: Create Co., Ltd. Tokyo Distribution Center (3-15-12 Ariake, Koto-ku, Tokyo) Date of delivery: April 8, 2020 Place of delivery: Anja Foundry Co., Ltd. (1-3-8 Toyama, Urasoe City, Okinawa Prefecture) Date of delivery: April 8, 2020 April 8, 2020 Delivery location: Maruei Kogyo Co., Ltd. Ageo Distribution Center (995 Ueno, Ageo City, Saitama Prefecture) Delivery date: April 14, 2020

The present invention relates to a resin joint that is installed through a floor slab of a building, and in particular, the present invention relates to a resin joint that is installed through a floor slab of a building. The present invention relates to a resin joint and a drainage piping structure that can reduce the possibility of the protrusion entering a side branch pipe.

Water supply equipment and drainage equipment are installed in apartment complexes, office buildings, etc. Of these, drainage equipment consists of vertical pipes (stand pipes, top pipes, down pipes) that penetrate up and down each floor of the building, and horizontal pipes (horizontal branch pipes, branch pipes) installed within each floor. A drainage piping structure including a drainage piping joint that connects these is widely known as a typical structure.
When installed in a building, this type of drainage pipe joint includes a pipe body (main body part) that is placed in a through hole in a floor slab, and the main body part can be connected to an upstream standpipe. It has an upper vertical pipe connection part at the upper end, a side branch pipe connection part connectable to the side branch pipe at the side surface, and a lower pipe connection part connectable to the downstream piping member at the lower end. Moreover, as such a drainage pipe joint, one formed of one or more resin injection molded products is widely known.

In such a drainage collection joint that connects a vertical drainage pipe and a horizontal branch pipe, if wastewater flows forcefully from the vertical drainage pipe into the drainage collection joint, the drainage flow forms a cylindrical water film and the drainage collection joint is closed. may flow down the inside of the In this case, the wastewater flow forming a cylindrical water film passes through the connecting portion with the side branch pipe so as to obstruct the connection with the side branch pipe, so there is a problem in that it obstructs the drainage flowing from the side branch pipe to the drainage collection joint. In addition, there is a risk that the drainage flow from the vertical drainage pipe to the drainage collection joint will be on the positive pressure side, and the drainage flow from the horizontal branch pipe to the drainage collection joint will be on the negative pressure side. There is also concern about the problem of backflow of water.

To solve these problems, Japanese Patent Application Laid-Open No. 2021-055417 (Patent Document 1) creates a cut with a protrusion in the flow of water flowing from the vertical pipe into the joint pipe main body, and from the horizontal branch pipe to the joint pipe main body side. Discloses a pipe joint that allows water to flow reliably into the pipe. The pipe joint disclosed in Patent Document 1 has a vertical pipe connection part at one end that can be connected to an upstream vertical pipe, and a joint pipe main body that has a side branch pipe connection part connectable to a horizontal branch pipe on a side surface. characterized in that, in the joint pipe main body, one or more protrusions are formed on the inner circumferential surface of the vertical pipe connection part side upstream of the horizontal branch pipe connection part (as disclosed in Patent Document 1). Claim 1). According to this pipe joint, even if a cylindrical water film is generated that flows down from the vertical pipe connection portion toward the joint pipe main body, the protrusion can form a dividing portion in the water film. Water that attempts to flow from the side branch pipe connection into the joint pipe main body can flow into the joint pipe main body through this divided part, so the internal pressure in the joint pipe main body near the side branch pipe connection increases. It is possible to suppress the water from becoming higher than necessary and prevent water from flowing back toward the side branch pipe (paragraph 0021 of Patent Document 1).

JP 2021-055417 Publication

However, in the pipe joint disclosed in Patent Document 1, the protrusion divides the cylindrical water film formed by the drainage flow (sometimes referred to as cutting the water film or cutting the water film). Even if it were possible, there is a problem that drainage water from the upper floor could hit the protrusion and enter the side branch pipe (backflow).
The present invention was developed in view of the above-mentioned problems, and its purpose is to divide the cylindrical water film formed by the drainage flow with protrusions, and to remove water from the upper floors. To provide a resin joint and a drainage piping structure capable of reducing the possibility that drainage water hits the protrusion and enters the side branch pipe.

In order to achieve the above object, the resin joint according to the present invention takes the following technical measures.
A resin joint according to an aspect of the present invention has an upper standpipe connection part connectable to an upstream standpipe at the upper end, a side branch pipe connection part connectable to a side branch pipe at the side, and a downstream end pipe connection part connectable to the upstream standpipe. A resin joint for the lowest floor, including a main body portion each having a lower pipe connection portion connectable to a piping member at the lower end, the inner circumferential surface of the main body portion being on the upstream side of the side branch pipe connection portion. or, one or more protrusions are formed on the inner circumferential surface of the upper member connected to the upper vertical pipe connection portion, and the resin joint is configured to prevent drainage from flowing into the side branch pipe due to the protrusions. It is characterized by having a prevention mechanism.

Preferably, in the resin joint for the lowest floor, the inflow prevention mechanism is realized by the protrusion not protruding beyond the inner diameter of the standpipe on the upstream side of the side branch pipe connection portion. Can be configured.
More preferably, in the resin joint for the lowest floor, the protrusion protrudes beyond the inner diameter of the standpipe on the upstream side of the side branch pipe connection portion, and the inflow prevention mechanism is arranged on an upper surface of the resin joint. This can be realized by the fact that the protrusion is not present in a region facing the lateral branch pipe connected to the lateral branch pipe connecting portion when viewed from above.

More preferably, in the resin joint for the lowest floor, the inflow prevention mechanism is attached to the upper vertical pipe connection portion in a top view of the resin joint with the pipe core of the horizontal branch pipe in a horizontal or vertical direction. The cross section of the standpipe to be connected is divided into four parts at 90 degree intervals around the pipe core of the standpipe, with the extension line of the pipe core of the side branch pipe as the line symmetry axis, and the fan is rotated by 45 degrees. The structure is realized by the absence of the protrusion in a region rotated 180 degrees with respect to the region including the extension line extending to the pipe core of the riser pipe among the four regions of the mold shape. Can be done.

A resin joint according to another aspect of the present invention has an upper standpipe connection part connectable to an upstream standpipe at the upper end, a side branch pipe connection part connectable to a side branch pipe at the side, and a downstream side A resin joint (not limited to the one for the lowest floor) that includes a main body portion each having a lower pipe connection portion at its lower end that can be connected to a piping member of One or more protrusions are formed on the inner circumferential surface of the main body or on the inner circumferential surface of the upper member connected to the upper vertical pipe connection part, and the resin joint is configured to prevent drainage to the side branch pipe by the protrusions. The protrusion protrudes beyond the inner diameter of the standpipe on the upstream side of the lateral branch pipe connection portion, and the inflow prevention mechanism includes an inflow prevention mechanism that prevents the inflow of , a structure covering an upper side of the lateral branch pipe connected to the lateral branch pipe connecting portion is realized by being present below the protrusion.

Preferably, in the resin joint not limited to use on the lowest floor, the structure may be an eaves provided on the main body.
More preferably, in a resin joint not limited to use on the lowest floor, the resin joint is a separate member from the main body, and is a branch pipe socket connected to a side branch pipe connection part of the main body. The structure may be configured to be an eaves provided at the branch pipe socket.
More preferably, in a resin joint not limited to use on the lowest floor, the resin joint is a separate member from the main body, and is a branch pipe socket connected to a side branch pipe connection part of the main body. and a connecting member installed between the main body and the branch pipe socket, and the structure may be an eaves provided on the connecting member.

More preferably, in a resin joint not limited to use on the lowest floor, the resin joint is a separate member from the main body, and is a branch pipe socket connected to a side branch pipe connection part of the main body. further comprising: a side branch pipe connected to the branch pipe socket;
The structure can be configured to be an eaves provided on the side branch pipe.
More preferably, in a resin joint not limited to use on the lowest floor, the resin joint is a separate member from the main body, and is a branch pipe socket connected to a side branch pipe connection part of the main body. further comprising: a side branch pipe is connected to the branch pipe socket, and the structure is an eaves provided on a connecting member installed between the branch pipe socket and the side branch pipe. It can be configured as follows.

More preferably, in a resin joint not limited to use on the lowest floor, the resin joint is a separate member from the main body, and is a branch pipe socket connected to a side branch pipe connection part of the main body. , and the upper member further includes a standpipe socket connected to an upper standpipe connection portion of the main body, the standpipe socket having a substantially cylindrical shape, and the protrusion provided on an inner circumferential surface. and the structure is a pipe wall in which a lower part of the substantially cylindrical shape of the vertical pipe socket extends to the main body, and when the resin joint is viewed from a side, the structure is a pipe wall of the branch pipe socket. With reference to the vertical direction, the upper end of the protrusion may be located on the upper side, and the lower end of the tube wall may be located on the lower side.

More preferably, in the resin joint not limited to use on the lowest floor, the pipe wall is extended below the substantially cylindrical shape in a circumferential direction of the substantially cylindrical shape in a portion where the branch pipe socket is present; The vertical pipe socket may be configured such that a cross section perpendicular to the pipe core is arcuate.
More preferably, in the resin joint for the lowest floor, the protrusion protrudes beyond the inner diameter of the standpipe on the upstream side of the side branch pipe connection portion, and the inflow prevention mechanism is arranged on a side surface of the resin joint. This can be realized by making the protrusion exist 140 mm or more above the lower surface of the lateral branch pipe connection portion when viewed from above.

More preferably, in the resin joint for the lowest floor, the resin joint is a separate member from the main body, and the vertical pipe socket connected to the upper vertical pipe connection part of the main body is connected to the upper vertical pipe. The protrusion may be further included as a member, and the protrusion may be configured to be provided in the vertical pipe socket.
More preferably, in the resin joint for the lowest floor, the resin joint is a separate member from the main body, and includes a vertical pipe socket connected to an upper vertical pipe connection part of the main body, and It may further include a connection member as the upper member installed between the main body portion and the standpipe socket, and the protrusion may be configured to be provided on the connection member.

A drainage piping structure according to yet another aspect of the present invention is characterized in that any of the resin joints described above is installed on the lowest floor or a floor slab other than the lowest floor.
More preferably, in the drainage piping structure, a piping member made by molding a resin composition containing a thermally expandable fire-resistant material can be connected to the lower piping connection portion.

According to the present invention, the resin is capable of dividing the cylindrical (cylindrical) water film formed by the drainage flow with projections, while reducing the possibility that drainage from the upper floor hits the projections and enters the side pipe. We can provide manufacturing fittings and drainage piping structures.

FIG. 2 is a two-view diagram (a top view and a half-sectional view showing a side surface) of a resin joint 100 (100A) according to an embodiment of the present invention. FIG. 2 is a two-view diagram (a top view and a half-sectional view showing a side surface) of a resin joint 100 (100B) according to an embodiment of the present invention. FIG. 2 is a two-view diagram (a top view and a half-sectional view showing a side surface) of a resin joint 100 (100X) according to an embodiment of the present invention. It is a figure for demonstrating the area|region where the protrusion 150 does not exist in the resin joint 100 (100B) based on embodiment of this invention. FIG. 1 is a two-view diagram (a top view and a half-sectional view showing a side surface) of a resin joint 100 (100C) according to an embodiment of the present invention. FIG. 2 is a two-view diagram (a top view and a half-sectional view showing a side surface) of a resin joint 100 (100E) according to an embodiment of the present invention. FIG. 2 is a two-view diagram (a top view and a half-sectional view showing a side surface) of a resin joint 100 (100D) according to an embodiment of the present invention. FIG. 2 is a two-view diagram (a top view and a half-sectional view showing a side surface) of a resin joint 100 (100F1) according to an embodiment of the present invention. FIG. 2 is a two-view diagram (a top view and a half-sectional view showing a side surface) of a resin joint 100 (100F2) according to an embodiment of the present invention. FIG. 2 is a two-view diagram (a top view and a half-sectional view showing a side surface) of a resin joint 100 (100I) according to an embodiment of the present invention. FIG. 2 is a two-view diagram (a top view and a half-sectional view showing a side surface) of a resin joint 100 (100H) according to an embodiment of the present invention. FIG. 2 is a two-view diagram (a top view and a half-sectional view showing a side surface) of a resin joint 100 (100G) according to an embodiment of the present invention.

Below, a resin joint 100 according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 12. The drainage piping structure according to the embodiment of the present invention is one in which the resin joints 100 shown in FIGS. 1 to 12 are installed on the lowest floor or a floor slab other than the lowest floor. The construction is performed so that the thermal expansion material 110 is present at the position. In addition, in the following explanation, the outer circumferential surface, the outer surface and the outer side, the outer layer side, the outer circumferential side and the outer side, the inner layer side, the inner circumferential side and the inner side, and the thermally expandable material and the thermally expandable refractory material are clearly distinguished and described. It may not have been done. Further, in the cross-sectional view, different members may not be clearly distinguished depending on the type of hatching. Furthermore, in the resin joint 100 according to the present embodiment, resin joints having different structures (strictly speaking) are distinguished by adding an alphabet or an alphabet + numeral to the code 100. Here, in the case of having a different structure but having the same function, it will simply be referred to as a resin joint 100.

<Resin joint 100 (limited to the bottom floor)>
The resin joint 100, which is limited to the lowest floor, will be described in detail with reference to FIGS. 1 to 4 and 11 to 12.
As shown in these figures, this resin joint 100 has an upper standpipe connection part 102 connectable to the upstream standpipe 200 at the upper end, and a side branch pipe connection part 104 connectable to the side branch pipe 400 at the upper end. on the side and a lower piping connection part 103 connectable to downstream piping members (down pipe 300 shown as an example, connection member 302 connected to the leg joint) at the lower end, respectively. This is a resin joint for the lower floor. This resin joint 100 is connected to the inner circumferential surface of the main body or to the upper member connected to the upper standpipe connection part 102 (standpipe socket 120H shown in FIG. , the standpipe adapter 122 shown in FIG. An inflow prevention mechanism (to be described in detail later) is provided to prevent drainage from flowing into the lateral branch pipe 400 due to the above-mentioned problems. The upper standpipe connection part 102 is provided with a standpipe socket 120, the standpipe 200 is connected to the upper standpipe connection part 102 via the standpipe socket 120, and the side pipe connection part 104 has a branch pipe. A pipe socket 140 is provided, and the horizontal branch pipe 400 is connected to the horizontal branch pipe connecting portion 104 via the branch pipe socket 140 . In addition to these, a connection adapter 121 shown in FIG. 11 and a socket 144 shown in FIG. 9 may be included as members constituting the resin joint 100.

Here, the downstream piping members include the down pipe 300, the connection member 302 connected to the leg joint, the extension pipe connected to the leg joint, etc., and as shown in FIG. This also includes a case where the portion 103 is a socket.
The inflow prevention mechanism in the resin joint for the lowest floor will be explained below.
As shown in FIG. 1, this inflow prevention mechanism is realized by the fact that the protrusion 150 does not protrude beyond the inner diameter of the standpipe 200 on the upstream side of the side branch pipe connection portion 104, although this is an example. be. That is, in the resin joint 100A shown in FIG. 1, as shown by dotted lines (hidden lines) in FIG.

As shown in FIG. 1, since the protrusion 150 does not protrude beyond the inner diameter of the standpipe 200, the possibility that drainage from the upper floor hits the protrusion 150 and enters the side branch pipe 400 can be reduced. Note that even if the protrusion 150 does not protrude beyond the inner diameter of the standpipe 200, if there is a certain distance from the lower end of the standpipe 200 to the position of the protrusion 150, the drainage will be greater than the inner diameter of the standpipe 200 at that distance. Since the water flows down while spreading, there is a possibility that the water film can be broken even if the protrusion 150 does not protrude beyond the inner diameter of the standpipe 200.

As shown in FIG. 2, in this resin joint 100, on the upstream side of the side branch pipe connection portion 104, a protrusion 150 protrudes beyond the inner diameter of the standpipe 200, and the inflow prevention mechanism This is realized by the absence of the protrusion 150 in the region facing the lateral branch pipe 400 connected to the lateral branch pipe connection portion 104 in the top view of the resin joint 100 (in this case, the resin joint 100B) shown in (A). It is something that Note that in FIG. 2A, there are three protrusions 150, but the present invention is not limited to this. The number and shape of the protrusions 150 are not limited as long as the following conditions are satisfied:

Furthermore, as shown in FIG. 3, although this inflow prevention mechanism is an example, the protrusion 152 protrudes beyond the inner diameter of the standpipe 200 on the upstream side of the side branch pipe connection portion 104, and the inflow prevention mechanism In a top view of the resin joint 100 (resin joint 100X here) shown in FIG. It will be realized. Note that in FIGS. 3(A) and 3(C), one protrusion 152 is shown, but the present invention is not limited to this. In other words, the number and shape of the protrusions 152 are not limited as long as they satisfy the following conditions (areas in which the protrusions 152 may exist).

The region where the protrusion 150 or the protrusion 152 in the inflow prevention mechanism shown in FIGS. 2 and 3 is not present will be explained with reference to FIG. 4, using the resin joint 100 in FIG. 2 (resin joint 100B here) as a representative. do.
First, in a top view of the resin joint 100B with the pipe core of the horizontal branch pipe 400 in the horizontal or vertical direction (this top view is shown in FIG. The cross section of the standpipe 200 is divided into four parts at 90 degree intervals around the pipe core of the standpipe 200, with the extension line of the pipe core of the horizontal branch pipe 400 as the axis of line symmetry. The regions divided into four in this manner are shown in FIG. 4A as an upper left region UL, an upper right region UR, a lower left region DL, and a lower right region DR.

Next, as shown in FIG. 4(B), the upper left region UL, upper right region UR, lower left region DL, and lower right region DR, which are divided into four regions, are divided into four fan-shaped regions rotated by 45 degrees. . The regions rotated by 45 degrees in this manner are shown as an upper region U, a lower region D, a left region L, and a right region R in FIG. 4(B).
The absence of the protrusion 150 in the region facing the side branch pipe 400 connected to the side branch pipe connecting portion 104 mentioned above means that the extension line extending to the pipe core of the standpipe 200 (the pipe of the side branch pipe 400 The reason why the protrusion 150 does not exist in the area rotated 180 degrees with respect to the area including the extension line of the core will be explained. As shown in FIG. 4(C), it is rotated by 180 degrees with respect to the left region L, right region R, and lower region D, which include the extension line of the pipe core of the side branch pipe 400 extending to the pipe core of the standpipe 200. In addition, the protrusion 150 does not exist in the right region R, the left region L, and the upper region U, and the protrusion 150 exists only in the lower region D.

That is, when three lateral branch pipes 400 are connected to the resin joint 100, the protrusions 150 do not exist (must not exist) in the three regions, and even if the protrusions 150 exist only in one region. If two lateral branch pipes 400 are connected to the resin joint 100, the protrusions 150 may not exist (must not exist) in the two areas, but the protrusions 150 may exist in the two areas. When one lateral branch pipe 400 is connected to the resin joint 100, the protrusion 150 may not exist (must not exist) in one region, but the protrusion 150 may exist in three regions.

As shown in FIGS. 2 to 4, since the protrusion 150 protrudes beyond the inner diameter of the standpipe 200, it is possible to divide the water film, and the protrusion 150 can be used to connect the side branch pipe. It does not exist in the region facing the side branch pipe 400 connected to the section 104. Therefore, even if the protrusion 150 protrudes beyond the inner diameter of the top pipe 200 and drainage from the upper floor hits the protrusion, there is no side branch pipe on the opposite side, so the drainage from the upper floor will flow into the side branch pipe. This can reduce the possibility of entering.

As shown in FIGS. 11 and 12, in this resin joint, on the upstream side of the side branch pipe connection portion 104, the protrusion 150 protrudes beyond the inner diameter of the standpipe 200, and the inflow prevention mechanism In the side view of the resin joint 100 shown in FIG. 11(B) and FIG. 12(B), from the lower surface of the side branch pipe connection part 104 (the same meaning is also applied to the lower surface of the branch pipe socket 140) to the upper side of L or more. This is realized by the presence of the protrusion 150. Here, although it is an example, the nominal diameter of the upstand pipe 200 is 100 A, the nominal diameter of the down pipe 300 is 125 A, the maximum nominal diameter of the side branch pipe 400 is 100 A, and L is 140 mm. More specifically, it has the following configuration.

As shown in FIG. 11, the resin joint 100 (resin joint 100H here) is a separate member from the main body, and has a standpipe socket 120H connected to the upper standpipe connection part 102 of the main body. It is further included as an upper member, and a protrusion 150 is provided in this vertical pipe socket 120H. At this time as well, the protrusion 150 is present at least L above the lower surface of the lateral branch pipe connection portion 104. Moreover, as shown in FIG. 11(A), in the resin joint 100H, six protrusions 150 are provided at 60 degree intervals on the inner circumferential surface of the vertical pipe socket 120H, although this is not limited.

Note that, as shown in FIG. 11C, a standpipe socket 120H is connected to the upper standpipe connection portion 102 of the main body of this resin joint 100H via a connection adapter 121. As shown in (D), the standpipe socket 120H2 may be connected to the upper standpipe connection portion 102 of the main body of the resin joint 100H without using such a connection adapter 121. However, the protrusion 150 provided on the inner periphery of both the standpipe socket 120H and the standpipe socket 120H2 is located at least L above the lower surface of the side branch pipe connection part 104.

As shown in FIG. 12, the resin joint 100 (resin joint 100G here) is a separate member from the main body and has a vertical pipe socket 120 connected to the upper vertical pipe connection part 102 of the main body. , further includes a standpipe adapter 122 which is a connection member as an upper member installed between the main body portion and the standpipe socket 120, and the protrusion 150 is provided on the standpipe adapter 122 which is this connection member. At this time as well, the protrusion 150 is present at least L above the lower surface of the lateral branch pipe connection portion 104. Moreover, as shown in FIG. 12(A), in the resin joint 100G, six protrusions 150 are provided at 60 degree intervals on the inner peripheral surface of the vertical pipe adapter 122, although this is not limited.

As shown in FIGS. 11 and 12, since the protrusion 150 protrudes beyond the inner diameter of the standpipe 200, it is possible to divide the water film, and the protrusion 150 is connected to the side branch pipe 400 by a length of L or more. In order to provide a distance (more precisely, the protrusion 150 is provided above the lower surface of the side branch pipe connection part 104 by L or more), the protrusion 150 protrudes beyond the inner diameter of the standpipe 200 and drains water from the upper floor. Since there is a distance to the side branch pipe 400 even if it hits the protrusion, it is possible to reduce the possibility that drainage from the upper floor will enter the side branch pipe.

<Resin joint 100 (not limited to bottom floor)>
With reference to FIGS. 5 to 10, the resin joint 100, which is not limited to use on the lowest floor, will be described in detail.
As shown in these figures, this resin joint 100 has an upper standpipe connection part 102 connectable to the upstream standpipe 200 at the upper end, and a side branch pipe connection part 104 connectable to the side branch pipe 400 at the upper end. on the side, and a lower piping connection part 103 connectable to the downstream piping member (as an example, the downpipe 300 and the connection member 302 connected to the leg joint) at the lower end. It is a manufactured joint. This resin joint 100 is connected to the inner circumferential surface of the main body (as shown in FIGS. 5 to 9) on the upstream side of the side branch pipe connection part 104, or the upper part connected to the upper vertical pipe connection part 102. One or more protrusions 150 for cutting water film are formed on the inner circumferential surface of a member (such as a standpipe socket 120I with an extended lower end shown in FIG. 10), and the resin joint 100 prevents wastewater flowing down the standpipe. An inflow prevention mechanism (to be described in detail later) is provided to prevent drainage from flowing into the side branch pipe 400 due to contact with the protrusion 150. The upper standpipe connection part 102 is provided with a standpipe socket 120, and the standpipe 200 is connected to the upper standpipe connection part 102 via the standpipe socket 120. A pipe socket 140 is provided, and the horizontal branch pipe 400 is connected to the horizontal branch pipe connecting portion 104 via the branch pipe socket 140 . In addition to these, an annular adapter 142 shown in FIG. 7 and a socket 144 shown in FIG. 9 may be included as members constituting the resin joint 100.

Here, the downstream piping members include the down pipe 300, the connection member 302 connected to the leg joint, the extension pipe connected to the leg joint, etc., and as shown in FIG. As mentioned above, this also includes the case where the portion 103 is a socket.
The inflow prevention mechanism in the resin joint 100, which is not limited to the one for the lowest floor, will be described below.
As shown in FIGS. 5 to 9, although this inflow prevention mechanism is an example, a protrusion 150 protrudes beyond the inner diameter of the standpipe 200 on the upstream side of the side branch pipe connection portion 104 in this resin joint 100. In addition, the inflow prevention mechanism includes a structure that covers the upper side of the horizontal branch pipe 400 connected to the horizontal branch pipe connecting portion 104 (such as an eave 105C, which will be described in detail later), whose lower end is extended when the resin joint 100 is viewed from the side. This is achieved by the standpipe socket 120I being located below the protrusion 150.

In this way, since the protrusion 150 protrudes beyond the inner diameter of the standpipe 200, the water film can be divided, and the structure covers the upper side of the lateral branch pipe 400 connected to the lateral branch pipe connection part 104. Because objects (eaves 105C, etc., which will be described in detail later, and the extended standpipe socket 120I) are located below the protrusion 150, the protrusion 150 protrudes beyond the inner diameter of the standpipe 200, making it difficult for people to see from the upper floor. Even if drainage water hits the protrusion, since there is a structure covering the upper side of the side branch pipe 400, it is possible to reduce the possibility that drainage water from the upper floor will enter the side branch pipe.
As shown in FIG. 5, this structure is, by way of example, an eave 105C provided on the main body of the resin joint 100.

Further, as shown in FIG. 6, the resin joint 100 (resin joint 100E here) is a separate member from the main body, and is a branch pipe socket connected to the side branch pipe connection part 104 of the main body. 140E, this structure is, by way of example, an eave 105E provided at the branch pipe socket 140E.
Further, as shown in FIG. 7, the resin joint 100 (resin joint 100D in this case) is a separate member from the main body, and is a branch pipe socket connected to the side branch pipe connection part 104 of the main body. 140 and an annular adapter 142 as a connecting member installed between the main body and the branch pipe socket 140, and this structure is provided in the annular adapter 142 as a connecting member, although this is an example. This is the eave 105D.

Further, as shown in FIG. 8, the resin joint 100 (resin joint 100F1 in this case) is a separate member from the main body, and is a branch pipe socket connected to the side branch pipe connection part 104 of the main body. 140, a horizontal branch pipe 402 is connected to the branch pipe socket 140, and this structure is an eave 105F1 provided on the horizontal branch pipe 402, although this is an example.
Further, as shown in FIG. 9, the resin joint 100 (resin joint 100F2 in this case) is a separate member from the main body, and is a branch pipe socket connected to the side branch pipe connection part 104 of the main body. 140, a horizontal branch pipe 400 is connected to the branch pipe socket 140, and this structure serves as a connecting member installed between the branch pipe socket 140 and the horizontal branch pipe 400, although this is an example. This is the eave 105F2 provided on the socket 144 of.

As shown in FIGS. 5 to 9, since the protrusion 150 protrudes beyond the inner diameter of the standpipe 200, the water film can be divided, and the lateral branch connected to the lateral branch pipe connection part 104 can be separated. A structure covering the upper side of the pipe 400 (the above-mentioned eaves 105C, eaves 105E, eaves 105D, eaves 105F1, and eaves 105F2, which may be collectively referred to as eaves 105) is located below the protrusion 150. Because of this, the protrusion 150 protrudes beyond the inner diameter of the top pipe 200, and even if drainage from the upper floor hits the protrusion, the eaves 105 as a structure that covers the upper side of the side branch pipe 400 exists. It is possible to reduce the possibility that drainage water from the floor will enter the side branch pipe. Note that the distance Φd between the eaves 105 and the lower end of the inner surface of the horizontal branch pipe 400 shown in FIGS. This is preferable because the possibility of entering the side branch pipe can be reduced, and the side branch pipe can merge into the resin joint without resistance. Note that this distance Φd is also set to 44 mm or more for the following reasons. The side branch pipe 400 connected to the side branch pipe connection part 104 of the resin joint 100 may be connected to a toilet, and this toilet has passed the JIS A 5207 (8.2.1.2 Discharge performance test d) test. As stipulated in 1) Ball Pass Performance Test, an opening is required through which a ball with a diameter of 44 mm or more can be discharged from the toilet (through which it can pass without any problem). In consideration of this regulation, the distance Φd between the eaves 105 and the lower end of the inner surface of the lateral branch pipe 400 is set to be 44 mm or more. In addition, the shape of the open end of the eaves 105 should be such that it can reduce the possibility that drainage water from the upper floor will enter the side branch pipe, and also allow it to flow from the side branch pipe to the resin joint without resistance. (Furthermore, the side branch pipe 400 is not particularly limited as long as it can satisfy the ball path performance test specified in the JIS above, considering the case where it is connected to a toilet bowl.)

Next, a structure that covers the upper side of the horizontal branch pipe 400 connected to the horizontal branch pipe connecting portion 104, which is different from the eaves 105 shown in FIGS. 5 to 9, will be described in detail with reference to FIG. do. Note that the resin joint 100 (specifically, the resin joint 100I) shown in FIG. 10 is not limited to the lowest floor, like the resin joint 100 shown in FIGS. 5 to 9.
As shown in FIG. 10, the resin joint 100 (resin joint 100I here) is a separate member from the main body, and includes a branch pipe socket 140 connected to the side branch pipe connection part 104 of the main body. The standpipe socket 120I is connected to the upper standpipe connecting portion 102 of the main body as an upper member. A protrusion 150 for cutting a water film is provided (the protrusion 150 protrudes beyond the inner diameter of the tube 200). The structure of the inflow prevention mechanism included in this resin joint 100I is, by way of example, a pipe wall 105I in which the substantially cylindrical lower part of the standpipe socket 120I extends to the main body; As shown in B), in a side view of the resin joint 100I, with the tube core of the branch pipe socket 140 as a reference in the vertical direction, the upper end of the protrusion 150 is on the upper side, and the lower end of the pipe wall 105I is on the lower side. It is something to do. Note that the upper side and the lower side are indicated by white arrows in FIG. 10(B).

Further, as shown in FIG. 10, the pipe wall 105I is located below the generally cylindrical shape of the vertical pipe socket 120I in the circumferential direction of the vertical pipe socket 120I where the branch pipe socket 140 is present. is extended, and the cross section of the vertical pipe socket 120I perpendicular to the pipe core is arcuate. That is, only in the portion where the branch pipe socket 140 is present, the pipe wall 105I as a structure (for example, the section perpendicular to the pipe core of the stand pipe socket 120I has an arc shape with a center angle of 90 degrees) 120I is realized by extending the lower part of the substantially cylindrical shape. Note that the cross section of the vertical pipe socket 120I perpendicular to the pipe core is not limited to an arcuate shape, and may be entirely circular. That is, the pipe wall 105I as a structure may exist over the entire 360 degrees around the pipe core of the standpipe 200.

As shown in FIG. 10, since the protrusion 150 protrudes beyond the inner diameter of the standpipe 200, it is possible to break up the water film, and the upper part of the lateral branch pipe 400 connected to the lateral branch pipe connection portion 104 is Since the structure covering the side (the pipe wall 105I formed by extending the substantially cylindrical lower part of the standpipe socket 120I described above) exists below the protrusion 150, the structure is smaller than the inner diameter of the standpipe 200. Even if the projection 150 protrudes and the drainage water from the upper floor hits the projection, there is a possibility that the drainage water from the upper floor will enter the horizontal branch pipe because there is an eaves as a structure that covers the upper side of the horizontal branch pipe 400. can be reduced.

As described above, according to the drainage piping structure in which the resin joint 100 and the resin joint 100 according to the present embodiment are installed on the bottom floor or a floor slab other than the bottom floor, the cylindrical shape formed by the drainage flow While dividing the (cylindrical) water film by the protrusions, it is possible to reduce the possibility that drainage from the upper floor hits the protrusions and enters the side branch pipe.
It should be noted that the embodiments disclosed herein are illustrative in all respects and should not be considered restrictive. The scope of the present invention is indicated by the claims rather than the above description, and it is intended that all changes within the meaning and range equivalent to the claims are included.

For example, such a change may include a drainage piping structure in which a (downstream side) piping member made by molding a resin composition containing a thermally expandable fire-resistant material is connected to the lower piping connection part 103. I don't mind. The downstream piping members include the downpipe 300, the connection member 302 connected to the leg joint, the extension pipe connected to the leg joint, etc., and as shown in FIG. As mentioned above, the case where 103 is a socket is also included.

The present invention is preferable for resin joints that are installed through floor slabs of buildings, and allows the drainage from the upper floors to flow while dividing the cylindrical (cylindrical) water film formed by the drainage flow with projections. It is particularly preferable in that it can reduce the possibility that it will hit the protrusion and enter the lateral branch canal.

100 Resin joint 102 Upper standpipe connection part 103 Lower pipe connection part 104 Side branch pipe connection part 105 Eaves 120 Standpipe socket 1
140 Branch pipe socket 200 Uppipe 300 Downpipe 400 Side branch pipe

Claims (17)

The upper standpipe connection part that can be connected to the upstream standpipe is on the top end, the side branch pipe connection part that can be connected to the side branch pipe is on the side, and the lower pipe connection part that can be connected to the downstream piping member is on the bottom end. A resin joint for the lowest floor including a main body portion each having a body portion,
One or more protrusions are formed on the inner circumferential surface of the main body part or on the inner circumferential surface of an upper member connected to the upper vertical pipe connection part on the upstream side of the lateral branch pipe connection part,
The resin joint is characterized in that the resin joint includes an inflow prevention mechanism that prevents drainage from flowing into the side branch pipe due to the protrusion. The resin-made pipe according to claim 1, wherein the inflow prevention mechanism is realized by the protrusion not protruding beyond the inner diameter of the standpipe on the upstream side of the side branch pipe connection part. Fittings. On the upstream side of the side branch pipe connection part, the protrusion protrudes beyond the inner diameter of the standpipe, and
The inflow prevention mechanism is realized by the absence of the protrusion in a region facing the lateral branch pipe connected to the lateral branch pipe connection portion when viewed from above of the resin joint. The resin joint according to item 1. In a top view of the resin joint with the pipe core of the horizontal branch pipe in the horizontal or vertical direction, the inflow prevention mechanism is configured to change the cross section of the standpipe connected to the upper standpipe connection portion to the upright pipe. The upright pipe is divided into four areas at 90 degree intervals around the pipe core of the pipe, using the extension line of the pipe core of the horizontal branch pipe as an axis of line symmetry, and rotated by 45 degrees. 4. The resin joint according to claim 3, characterized in that said projection is not present in a region rotated by 180 degrees with respect to a region including said extension line extending to a tube core. The upper standpipe connection part that can be connected to the upstream standpipe is on the top end, the side branch pipe connection part that can be connected to the side branch pipe is on the side, and the lower pipe connection part that can be connected to the downstream piping member is on the bottom end. A resin joint including a main body portion each having a main body portion,
One or more protrusions are formed on the inner circumferential surface of the main body part or on the inner circumferential surface of an upper member connected to the upper vertical pipe connection part on the upstream side of the lateral branch pipe connection part,
The resin joint includes an inflow prevention mechanism that prevents drainage from flowing into the side branch pipe due to the protrusion,
On the upstream side of the side branch pipe connection part, the protrusion protrudes beyond the inner diameter of the standpipe, and
The inflow prevention mechanism is realized by a structure that covers the upper side of the lateral branch pipe connected to the lateral branch pipe connection portion being located below the protrusion when viewed from a side of the resin joint. A resin joint characterized by: The resin joint according to claim 5, wherein the structure is an eave provided on the main body. The resin joint further includes a branch pipe socket that is a separate member from the main body and is connected to a side branch pipe connection part of the main body,
6. The resin joint according to claim 5, wherein the structure is an eave provided at the branch pipe socket. The resin joint is a separate member from the main body, and is installed between a branch pipe socket connected to a side branch pipe connection part of the main body and between the main body and the branch pipe socket. further comprising a connecting member,
The resin joint according to claim 5, wherein the structure is an eave provided on the connection member. The resin joint further includes a branch pipe socket that is a separate member from the main body and is connected to a side branch pipe connection part of the main body,
A side branch pipe is connected to the branch pipe socket,
The resin joint according to claim 5, wherein the structure is an eave provided on the side branch pipe. The resin joint further includes a branch pipe socket that is a separate member from the main body and is connected to a side branch pipe connection part of the main body,
A side branch pipe is connected to the branch pipe socket,
6. The resin joint according to claim 5, wherein the structure is an eaves provided on a connecting member installed between the branch pipe socket and the side branch pipe. The resin joint is a separate member from the main body, and is connected to a branch pipe socket connected to a side branch pipe connection part of the main body and an upper vertical pipe connection part of the main body. further including a standpipe socket as the upper member;
The vertical pipe socket has a substantially cylindrical shape, and the protrusion is provided on the inner peripheral surface,
The structure is a pipe wall in which a lower part of the substantially cylindrical shape in the standpipe socket extends to the main body,
In a side view of the resin joint, the upper end of the protrusion is located on the upper side, and the lower end of the pipe wall is located on the lower side, with the pipe core of the branch pipe socket as a reference in the vertical direction. The resin joint according to claim 5. The pipe wall is extended in the circumferential direction of the substantially cylindrical shape in a portion where the branch pipe socket is located, and has an arc-shaped cross section perpendicular to the pipe core of the vertical pipe socket. The resin joint according to claim 11, characterized in that: On the upstream side of the side branch pipe connection part, the protrusion protrudes beyond the inner diameter of the standpipe, and
According to claim 1, the inflow prevention mechanism is realized by providing the protrusion 140 mm or more above the lower surface of the side branch pipe connection portion when viewed from a side of the resin joint. Resin fittings. The resin joint further includes, as the upper member, a standpipe socket that is a separate member from the main body and is connected to an upper standpipe connection part of the main body,
14. The resin joint according to claim 13, wherein the protrusion is provided at the standpipe socket. The resin joint is a separate member from the main body, and is installed between a standpipe socket connected to an upper standpipe connection part of the main body and between the main body and the standpipe socket. further comprising a connecting member as the upper member,
14. The resin joint according to claim 13, wherein the protrusion is provided on the connecting member. A drainage piping structure, characterized in that the resin joint according to any one of claims 1 to 15 is installed on the lowest floor or a floor slab other than the lowest floor. 17. The drainage piping structure according to claim 16, wherein a piping member made by molding a resin composition containing a thermally expandable fire-resistant material is connected to the lower piping connection part.

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