Socket member, drain collecting pipe and leg part joint including socket member, and connection method using socket member

Abstract

To suitably absorb thermal elongation of a resin pipe affected by heat.SOLUTION: A socket member 100 is used for connecting a pipe member (a drain collecting pipe 200, a leg part joint) with a synthetic resin drain pipe (an upper vertical pipe 210 or a lateral branch pipe 220 and a lateral branch pipe 230 connected to the drain collecting pipe 200, and a lowest floor drain collecting pipe or a lower vertical pipe connected to the leg part joint). The socket member 100 is made of a hard polyvinyl chloride and has a substantially hollow cylindrical shape. The socket member 100 includes: a projecting stopper 102 projecting to an inner surface of the substantially hollow cylindrical shape of the socket member 100 and extending in a pipe axial direction; and an annular diameter-reduced portion 104 or a projecting diameter-reduced portion formed in an end edge at the pipe member side in the stopper 102. In the case of that the pipe member is the drain collecting pipe 200 and the annular projecting diameter-reduced portion 104, the socket member 100 includes a cutout portion 106 at the lower side at the drain collecting pipe 200 side.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a technology for connecting pipe components (such as a drainage manifold and a leg joint) to a synthetic resin drainage pipe (such as an (upper) standpipe or horizontal branch pipe connected to the drainage manifold, or a lowest floor drainage manifold or a (lower) standpipe connected to the lowest floor drainage manifold) and, in particular, to a receiving member, a drainage manifold and leg joint equipped with the receiving member, which can suitably absorb thermal elongation and prevent damage to the pipe components due to thermal elongation even when the synthetic resin drainage pipe is affected by heat and elongates in the longitudinal direction of the drainage pipe, and a connection method using the receiving member. [Background technology]

[0002] Water supply and drainage systems are installed in apartment buildings, office buildings, and other buildings. A typical drainage system is a widely known drainage piping structure that includes a standpipe (synonymous with a vertical pipe) that runs vertically through each floor of the building, horizontal branch pipes installed on each floor, a drainage collector pipe (synonymous with a drainage collector joint) that connects these, and a foot joint that connects to the drainage collector pipe on the lowest floor. In such a drainage piping structure, if a drainage pipe made of synthetic resin is used for the standpipe, the drainage pipe may expand longitudinally (thermal elongation) due to the influence of heat. It is necessary to effectively absorb this thermal expansion to prevent damage to the pipe components due to thermal elongation.

[0003] For example, Japanese Patent Application Laid-Open No. 2021-042664 (Patent Document 1) discloses a drainage manifold joint equipped with a vertical bushing. The drainage manifold disclosed in Patent Document 1 is a drainage manifold that is installed in a through hole in a floor slab and includes an upper connecting pipe that is connected to a vertical pipe on the upper floor and a lower connecting pipe that is connected to a vertical pipe on the lower floor. The lower end of the upper connecting pipe and the upper end of the lower connecting pipe are positioned within the through hole in the floor slab, and are located within the through hole in the floor slab. A fire-resistant sheet having a height of 30 mm to 150 mm is wrapped around the outer periphery of the lower connecting pipe. The upper connecting pipe has a vertical pipe connecting portion that can be connected to a vertical pipe and a plurality of horizontal pipe connecting portions that can be connected to horizontal pipes, and is made of a transparent or semi-transparent material. A horizontal bush with an enlarged portion inside which a gasket is placed is fitted and adhered to the horizontal pipe connecting portion, and a vertical bush with an enlarged portion inside which a gasket is placed is fitted and adhered to the vertical pipe connecting portion, and the horizontal bushes are made of a transparent or semi-transparent material (Claim 1).

[0004] In this drainage manifold joint, when the vertical pipe P1 expands thermally (synonymous with thermal contraction), the end of the first vertical pipe P1 abuts against a step 22b that protrudes radially inward and is formed by protruding from the lower end of a lip portion 22a of a vertical gasket 22 made of a rubber material typically used in drainage equipment, such as ethylene-propylene-diene rubber (EPDM), thereby absorbing the thermal expansion and contraction of the first vertical pipe P1 (paragraph 0044). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2021-042664 Summary of the Invention [Problem to be solved by the invention]

[0006] However, Patent Document 1 merely discloses a step portion 22b of a vertical packing 22 made of a rubber material to absorb thermal expansion and contraction of the first vertical pipe P1, (1) Is it really possible for the end of the first vertical pipe P1, which has thermally expanded, to come into contact with and absorb the stepped portion 22b of the vertical packing 22 made of a rubber material? (2) The vertical packing 22 made of rubber material is used, but because it is made of rubber, it needs to be lubricated, and the lubricant needs to be prepared separately and work needs to be done on site. (3) Patent Document 1 does not mention anything about the structure for absorbing thermal expansion of the resin pipe other than the above-mentioned paragraph 0044. (4) Patent Document 1 does not describe any pipe components other than the drainage manifold joint to be connected to the synthetic resin drainage pipe. It is unclear from the disclosure of Patent Document 1 whether the thermal expansion of a synthetic resin drainage pipe (for example, a drainage manifold or leg joint) can be absorbed suitably and without reducing work efficiency when a pipe component (for example, a drainage manifold or leg joint) is connected to a synthetic resin drainage pipe (for example, an upper vertical pipe or horizontal branch pipe connected to the drainage manifold, or a bottom floor drainage manifold or leg joint).

[0007] The present invention was developed in consideration of the above-mentioned problems, and its purpose is to provide a receiving member, a drainage collector pipe and leg joint equipped with the receiving member, and a connection method using the receiving member, which can suitably absorb thermal expansion of a synthetic resin drainage pipe when connecting a pipe member (for example, a drainage collector pipe or a leg joint) to a synthetic resin drainage pipe (for example, an upper standpipe or horizontal branch pipe connected to the drainage collector pipe, or a bottom floor drainage collector pipe or standpipe connected to a leg joint). [Means for solving the problem]

[0008] In order to achieve the above object, the receiving member according to one aspect of the present invention employs the following technical means. In other words, the receiving member according to one aspect of the present invention is a receiving member made of synthetic resin and having an approximately hollow cylindrical shape, which is used to connect a pipe member to a drainage pipe made of synthetic resin, and is characterized by having a protruding stopper that protrudes from the inner surface of the approximately hollow cylindrical shape and extends in the axial direction of the pipe, and a circular or protruding reduced diameter portion formed at the end of the stopper on the pipe member side.

[0009] Preferably, the stopper and the reduced diameter portion of the ridge can be configured to be provided discretely on the circumferential surface of the inner surface. More preferably, the stoppers and the reduced diameter portions of the ridges can be provided at approximately equal intervals on the circumferential surface of the inner surface. More preferably, the receiving member is fitted into the pipe member to connect the pipe member and the receiving member, and the receiving member can be transparent so that the abutment state between the drain pipe and the stopper can be visually confirmed in the connected state.

[0010] More preferably, the receiving member is fitted into the pipe member to connect the pipe member and the receiving member, the receiving member being transparent, and the starting end of the stopper on the drain pipe side can be configured to be positioned closer to the drain pipe than the end of the pipe member in the connected state. In addition, a drainage collecting pipe according to another aspect of the present invention is characterized in that it has any of the above-mentioned inlet members at the vertical pipe connection section or the horizontal branch pipe connection section, and is equipped with swirl vanes inside.

[0011] Preferably, the drain pipe is a horizontal branch pipe, the pipe member is the drainage collecting pipe, and the stopper and the reduced diameter portion provided on the receiving member can be configured so as not to be present below the receiving member. More preferably, the receiving member can be configured to have a notch on the lower side on the drainage collecting pipe side. More preferably, the receiving member may have different inner diameters on the drainage collecting pipe side and the side of the horizontal branch pipe, and may be configured so that the pipe axis on the side of the horizontal branch pipe is eccentric downward relative to the pipe axis on the drainage collecting pipe side.

[0012] Furthermore, according to yet another aspect of the present invention, there is provided a leg joint including any one of the above-described socket members at a riser pipe connection portion. Preferably, the drain pipe may be a lowest floor drainage manifold or a standpipe, and the pipe member may be the leg joint. Further, a connection method according to yet another aspect of the present invention is a connection method for connecting a pipe member and a synthetic resin drainage pipe,

[0013] The pipe member is provided with a transparent receiving member made of synthetic resin and having an approximately hollow cylindrical shape, and the receiving member is fitted into the pipe member to connect the pipe member and the receiving member, and the receiving member has a protruding stopper that protrudes from the inner surface of the approximately hollow cylindrical shape and extends in the pipe axial direction, and a circular or protruding reduced diameter portion formed at the end of the stopper on the pipe member side, and the connection method includes the steps of: abutting the outer surface of the drain pipe against the inner surface of the receiving member on the drain pipe side of the receiving member and starting to insert the drain pipe into the receiving member; visually determining through the transparent receiving member whether the end face of the drain pipe abuts against the protruding stopper that the receiving member has on its inner surface; and when it is determined that the end face of the drain pipe abuts against the stopper, terminating the insertion of the drain pipe into the receiving member. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide a receiving member, a drainage collector pipe and leg joint equipped with a receiving member, and a connection method using a receiving member that can suitably absorb thermal expansion of a synthetic resin drainage pipe when connecting a pipe member (a drainage collector pipe, a leg joint, as one example) to a synthetic resin drainage pipe (an upper standpipe or horizontal branch pipe connected to the drainage collector pipe, or a bottom floor drainage collector pipe or standpipe connected to the leg joint, as one example). [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a cross-sectional view of a drainage collecting pipe provided with a receiving member according to an embodiment of the present invention. [Figure 2] 1A and 1B are a top view and a cross-sectional view of a leg joint (part 1) equipped with a receiving member according to an embodiment of the present invention. [Figure 3] 1A and 1B are a top view and a cross-sectional view of a leg joint (part 2) equipped with a receiving member according to an embodiment of the present invention. [Figure 4] (A) to (D) are plan views of a receiving member 100 according to an embodiment of the present invention, (E) a cross-sectional view taken along line 4E-4E in FIG. 4(C), (F) a perspective view, and (G) an enlarged view of the 4G area in FIG. 4(E). [Figure 5] 5A to 5D are plan views of a receiving member 150 according to an embodiment of the present invention, FIG. 5E is a cross-sectional view taken along line 5E-5E of FIG. 5C, and FIG. 5F is a perspective view. [Figure 6] 6A to 6D are plan views of a receiving member 160 according to an embodiment of the present invention, FIG. 6E is a cross-sectional view taken along line 6E-6E of FIG. 6C, and FIG. 6F is a perspective view. [Figure 7] 7A to 7D are plan views of a receiving member 170 according to an embodiment of the present invention, FIG. 7E is a cross-sectional view taken along line 7E-7E of FIG. 7C, and FIG. 7F is a perspective view. [Figure 8] 1A is a perspective view of a receiving member 100, FIG. 1B is a perspective view of a receiving member 150, FIG. 1C is a perspective view of a receiving member 160, and FIG. 1D is a perspective view of a receiving member 170 according to an embodiment of the present invention. [Figure 9] In the drainage collecting pipe shown in Figure 1, (A) is an enlarged cross-sectional view to explain drainage from the horizontal branch pipe, and (B) is a further enlarged view of area 9B shown in Figure 9(A) to explain the state of the resin pipe when not extended and to explain the position of the stopper starting end. [Figure 10] 10A and 10B are enlarged cross-sectional views for explaining the state of the resin pipe in the drainage collecting pipe shown in FIG. 1 when stretched, respectively. DETAILED DESCRIPTION OF THE INVENTION

[0016] The following describes in detail, with reference to the drawings, a receiving member, a drainage collecting pipe and a leg joint equipped with the receiving member, and a connection method using the receiving member according to an embodiment of the present invention. The receiving member according to this embodiment is characterized by its ability to effectively absorb thermal elongation and prevent damage to the pipe members when connecting a pipe member (such as a drainage collecting pipe or a leg joint, for example) to a synthetic resin drainage pipe (such as an (upper) standpipe or horizontal branch pipe connected to the drainage collecting pipe, or a lowest floor drainage collecting pipe or a (lower) standpipe connected to the lowest floor drainage collecting pipe, for example). Even if the synthetic resin drainage pipe (sometimes simply referred to as a resin pipe) expands longitudinally due to heat, the thermal expansion can be effectively absorbed, preventing damage to the pipe members due to thermal expansion. To effectively absorb thermal expansion, receiving members are attached to the drainage collecting pipe and the leg joint.

[0017] As an example, four types of these receiving members will be described, each with a different diameter (nominal diameter) for connecting to a plastic pipe, as shown in Figure 8. In order of decreasing diameter, they are receiving member 100 shown in Figure 8(A), receiving member 150 shown in Figure 8(B), receiving member 160 shown in Figure 8(C), and receiving member 170 shown in Figure 8(D). These receiving members, which will be described in detail later, differ in diameter, in that receiving member 100 and receiving member 150 have eccentric pipe axes on the pipe member side and the plastic pipe side (receiving member 160 and receiving member 170 are not eccentric), and in that receiving member 100, receiving member 150, and receiving member 160 have cutout portion 106 (receiving member 170 does not). The four types of receiving member given as examples thus differ in their diameter (nominal diameter) and the above-mentioned points, but they all share the same feature of effectively absorbing thermal expansion of the plastic pipe, so receiving member 100, receiving member 150, receiving member 160, and receiving member 170 may be described as representing receiving member 100.

[0018] The drainage collecting pipe 200 shown in Fig. 1 is an example of a pipe member, and the leg joints 300 and 310 shown in Fig. 2 and 3 are other examples of pipe members. When the pipe member is the drainage collecting pipe 200 shown in Fig. 1, an example of a drainage pipe made of synthetic resin is the upper standpipe 210 or the horizontal branch pipes 220 and 230 connected to the drainage collecting pipe 200, and when the pipe member is the leg joints 300 and 310 shown in Fig. 2 and 3, an example of a drainage pipe made of synthetic resin is the lowest floor drainage collecting pipe or the lower standpipe 240 (when the drainage collecting pipe 200 shown in Fig. 1 is installed on the lowest floor) connected to the leg joint 300 or the leg joint 310. Since the only difference between leg joint 300 and leg joint 310 is the diameter (nominal diameter) of the receiving member to which they are attached, leg joint 300 and leg joint 310 may be described as being representative of leg joint 300.

[0019] In the drawings referred to in the description of the present embodiment, including these figures (for example, the drainage manifold 200 shown in FIG. 1), vibration-damping materials formed from butyl-based (e.g., butyl rubber) or asphalt-based (e.g., rubber asphalt, modified asphalt), thermally expandable fire-resistant sheets, thermally expandable fire-resistant materials, vibration insulators formed from fire-resistant inorganic fibers, and sound-insulating covers formed from rubber-based materials are shown, but are not described because they are not relevant to the present invention. Furthermore, the drawings referred to in the description of the present embodiment may be drawn in a schematic manner to facilitate understanding of the present invention, or may not match one another due to the omission of details. Furthermore, the same components (structures) in different figures are designated by the same reference numerals, and their description will not be repeated. An example of such identical components is a rubber gasket 250. This rubber gasket 250 is lubricated and attached to the drainage collecting pipe 200 or leg joint 300 at the manufacturing factory of the drainage collecting pipe 200 or leg joint 300 before shipping, which is advantageous in terms of work efficiency in that there is no need to apply lubricant at the construction site.

[0020] 1 to 10 (particularly, FIGS. 4 to 8), a receiving member 100 according to this embodiment will be described. The features of the receiving member 100 will be explained below. The receiving member 100 is used to connect pipe components (a drainage collecting pipe 200, a leg joint 300) to drainage pipes made of synthetic resin (an upper standpipe 210 or a horizontal branch pipe 220 and a horizontal branch pipe 230 connected to the drainage collecting pipe 200, and a lowest floor drainage collecting pipe or a lower standpipe 240 (when the drainage collecting pipe 200 shown in FIG. 1 is installed on the lowest floor) connected to the leg joint 300). The receiving member 100 is made of synthetic resin (PVC-U, rigid polyvinyl chloride, is one example) and has a generally hollow cylindrical shape. The receiving member 100 has a protruding stopper 102 that protrudes from the inner surface of the generally hollow cylindrical shape of the receiving member 100 and extends in the pipe axial direction, and an annular reduced diameter portion 104 or a reduced diameter protruding portion formed at the end of the stopper 102 on the pipe component side.

[0021] All figures referred to in the description of this embodiment show annular reduced diameter portions 104. The reduced diameter portions of the ridges have an elongated shape similar to that of the ridge stoppers 102, and one example of such a shape is one that protrudes from the end of the stopper 102 on the tubular member side to the inner surface of the approximately hollow cylindrical shape of the receiving member 100 and extends in the axial direction of the tube. Because the reduced diameter portions of the ridges are thus provided so as to connect with the end of the stopper 102 on the tubular member side, the positions and number of the reduced diameter portions of the ridges are necessarily the same as those of the stoppers 102.

[0022] The stoppers 102 and the reduced diameter portions of the ridges are provided discretely on the circumferential surface of the inner surface at approximately equal intervals (although this is not a limitation). For example, as shown in Figures 4(C), 5(C), 6(C), and 7(C), they are provided discretely at intervals of approximately 120 degrees. Note that the number and positions are not limited to those shown in these figures (although they are limited to not being located on the lower side, as will be described later).

[0023] As described above, this receiving member 100 is fitted into the pipe members (drainage collecting pipe 200, leg joint 300) as shown in Figures 1 to 3 and 9 to 10, resulting in a connected state in which the pipe members (drainage collecting pipe 200, leg joint 300) and receiving member 100 are connected. Preferably, receiving member 100 is transparent, so that the abutting state between the drain pipe and stopper 102 can be visually confirmed in this connected state. Here, this transparency does not include opacity, which does not allow visual confirmation of the abutting state between the drain pipe and stopper 102 in the connected state, but includes both colorless transparency and colored transparency, which allow visual confirmation.

[0024] Furthermore, in this connected state and when the receiving member 100 is transparent, as shown in Figure 9(B), the starting end 102S of the stopper 102 on the drain pipe (in this Figure 9(B) the horizontal branch pipe 230) side is located closer to the drain pipe (in this Figure 9(B) the horizontal branch pipe 230) than the end of the pipe member (in this Figure 9(B) the horizontal branch pipe connection portion 202C of the drain collecting pipe 200). With this structure, even though the receiving member 100 is transparent, the pipe member (in this Figure 9(B) the horizontal branch pipe connection portion 202C of the drain collecting pipe 200) is opaque, which avoids the problem of not being able to visually confirm the abutment state between the drain pipe and the stopper 102 in the connected state.

[0025] 1 to 10 (particularly FIGS. 1, 9 and 10), the features of a drainage collecting pipe 200 according to this embodiment will be described. The drainage collecting pipe 200 is provided with an inlet member 100 having the above-described features at a riser pipe connecting portion 202A or a lateral branch pipe connecting portion 202C, and is provided with a swirl vane 204C therein. Here, the drainage collecting pipe 200 is composed of a water collecting chamber 202 and a lower pipe 204, and is provided with a swirl vane 204C at a collecting pipe reduced diameter portion 204B of the lower pipe 204.

[0026] As shown in Figures 1 and 9 to 10, when the drain pipe is a horizontal branch pipe 220 or a horizontal branch pipe 230 and the pipe member is a drainage collecting pipe 200, the stopper 102 and the reduced diameter portion (when simply referred to as the reduced diameter portion without a reference symbol, the annular portion and the ridge portion are not included) provided in the receiving member 100 are As shown in Figures 4(C), 5(C), and 6(C), it is preferable that stoppers 102 are not present on the underside of receiving member 100 because they are provided discretely at intervals of approximately 120 degrees as shown in Figures 4(C), 5(C), 6(C), and 7(C), and therefore are not present on the underside of receiving member 100, the reduced diameter portion of the ridge is also not present on the underside of receiving member 100 because it is provided at the end of stopper 102, and annular reduced diameter portion 104 is not present on the underside of receiving member 100 because it has cutout portion 106 as described below.

[0027] Furthermore, when the pipe member is a drainage collecting pipe 200, as shown in FIGS. 4(B), 5(B), and 6(B), the receiving member 100 preferably has a notch 106 on its lower side facing the drainage collecting pipe 200. This notch 106, by way of example, is formed by cutting out the portion indicated by the dashed line in the annular reduced diameter portion 104. As shown in FIG. 9(A), this notch 106 can prevent drainage water from the side branch pipe 220 and the side branch pipe 230 from stagnating. Note that if the reduced diameter portion is a rib, it does not have a portion corresponding to the dashed line, and therefore does not require the notch 106, preventing drainage water from the side branch pipe 220 and the side branch pipe 230 from stagnating. Furthermore, since a swirl vane 204C is provided downstream of this, the synergistic effect of this notch 106 and the swirl vane 204C allows drainage water from the side branch pipe 220 and the side branch pipe 230 to flow downstream in an optimal manner.

[0028] 4(A) and 5(A), the inner diameter of the inlet member 100 may differ between the drainage collecting pipe 200 side and the side of the horizontal branch pipe 220 or horizontal branch pipe 230, and the pipe axis LV(1) on the side of the horizontal branch pipe is offset downward with respect to the pipe axis LV(2) on the side of the drainage collecting pipe. By offsetting the pipe axis LV(1) on the side of the horizontal branch pipe downward with respect to the pipe axis LV(2) on the side of the drainage collecting pipe in this way, the lower ends of the horizontal branch pipes 220 and 230 can be aligned, which is preferable because it allows the heights of the support members for the horizontal branch pipes to be the same.

[0029] The features of the leg joint 300 according to this embodiment will be described with reference to Figures 1 to 10 (particularly Figures 2 and 3). The leg joint 300 has a receiving member 100 with the above-mentioned features at the standpipe connection part 300A. In this case, the drainage collecting pipe 200 is a drainage collecting pipe 200 installed on the lowest floor, or a lower standpipe 240 (when the drainage collecting pipe 200 shown in Figure 1 is installed on the lowest floor), and the pipe member is the leg joint 300.

[0030] Next, with reference to Figures 1 to 10 (particularly Figures 1, 4 to 10), the features of the connection method for connecting a pipe member (the drainage collecting pipe 200 in Figures 1, 9 to 10, and the leg joint 300 in Figures 2 to 3) equipped with the receiving member 100 of this embodiment to a synthetic resin drainage pipe (the upper standpipe 210 or the horizontal branch pipe 220 and the horizontal branch pipe 230 connected to the drainage collecting pipe 200, and the lowest floor drainage collecting pipe or the lower standpipe 240 (when the drainage collecting pipe 200 shown in Figure 1 is installed on the lowest floor) connected to the leg joint 300) will be described.

[0031] In this case, the pipe member is provided with a transparent, generally hollow cylindrical receiving member 100 made of synthetic resin. The receiving member 100 is fitted into the pipe members (drainage collecting pipe 200, leg joint 300) and connected to the pipe members (drainage collecting pipe 200, leg joint 300). The receiving member 100, which is characterized as described above, is provided with a ridge-like stopper 102 that protrudes from the inner surface of the generally hollow cylindrical shape and extends in the pipe axial direction, and an annular reduced diameter portion 104 or ridge-like reduced diameter portion formed at the end of stopper 102 on the pipe member side.

[0032] The connection method according to this embodiment includes the following three steps. For example, as shown in FIG. 9(A), first, on the drain pipe (horizontal branch pipe 230 in the case shown in FIG. 9(A)) side of the receiving member 100, the outer circumferential surface of the drain pipe (horizontal branch pipe 230) is brought into contact with the inner circumferential surface of the receiving member 100, and the drain pipe (horizontal branch pipe 230) begins to be inserted into the receiving member 100. do.

[0033] Next, as shown in Figures 4(G) and 9(B), for example, whether the end face of the drain pipe (horizontal branch pipe 230) comes into contact with the stopper 102 provided as a protrusion on the inner surface of the receiving member 100 is determined visually through the transparent receiving member 100. More specifically, the operation of inserting the drain pipe (horizontal branch pipe 230) into the receiving member 100 is continued while making the visual determination. Next, when it is determined that the end face of the drain pipe (horizontal branch pipe 230) abuts against the stopper 102, the insertion of the drain pipe (horizontal branch pipe 230) into the receiving member 100 is completed. More specifically, while visually determining, the insertion operation of the drain pipe (horizontal branch pipe 230) into the receiving member 100 continues until the end face of the drain pipe (horizontal branch pipe 230) abuts against the stopper 102 (more specifically, until it abuts against the starting end 102S of the stopper 102), and when it abuts, the insertion operation is completed.

[0034] In this way, when the drain pipe (horizontal branch pipe 230) is inserted into the receiving member 100 (when the connection of the horizontal branch pipe 230 to the drain collecting pipe 200 via the receiving member 100 is completed), the end face position of the synthetic resin drain pipe (horizontal branch pipe 230) is in a position abutting against the stopper 102 (non-extended state), as shown in Figures 4(G) and 9(B). From this state, when the synthetic resin drain pipe (horizontal branch pipe 230) is thermally elongated, its end face position is in a position abutting against the reduced diameter portion, as shown in Figures 4(G) and 10(B) (extended state). In this way, in the drainage collecting pipe 200 equipped with the receiving member 100 of this embodiment, the insertion depth when connecting the horizontal branch pipe 230 to the drainage collecting pipe 200 via the receiving member 100 (inserting the horizontal branch pipe 230 into the drainage collecting pipe 200) can be easily and visually confirmed by the stopper 102 (it is manually inserted up to the hatched arrow shown in Figure 4(G) but cannot overcome the stopper 102 by human hand), and when the drainage pipe (horizontal branch pipe 230) made of synthetic resin undergoes thermal elongation, the end face of the drainage pipe (horizontal branch pipe 230) overcomes the stopper 102 and its end face position comes into contact with the reduced diameter portion as shown in Figures 4(G) and 10(B) (thermal elongation up to the black arrow shown in Figure 4(G)), and the thermal elongation can be suitably absorbed (the end face of the drainage pipe (horizontal branch pipe 230) does not exceed the reduced diameter portion). The height of the protruding stopper 102 (height of protrusion from the inner surface), the length in the tube axis direction (length of flat portion 102B), and the angle of inclined portion 102A of stopper 102, as well as the height of the reduced diameter portion (height of further protrusion from stopper 102) and the angle of inclined portion 104A of the reduced diameter portion, are appropriately set so as to achieve the above-mentioned effects (ease of positioning during connection, suitable absorption of thermal elongation). The length of the reduced diameter portion in the tube axis direction (length of flat portion 104B) is also appropriately set.

[0035] The following mainly describes the aspects other than those described above regarding the receiving member, the drainage manifold and leg joint equipped with the receiving member, and the connection method using the receiving member according to this embodiment, which has the above-mentioned features. 1 and 9-10, the drainage collecting pipe 200 according to this embodiment is configured by connecting a water collection chamber 202 and a lower pipe 204 by fitting a water collection chamber fitting portion 202D and a lower pipe fitting portion 204A together. The water collection chamber 202 includes a water collection portion 202B, an (upper) standpipe connecting portion 202A provided above the water collection portion 202B, and a horizontal branch pipe connecting portion 202C provided to the side of the water collection portion 202B. The lower pipe 204 includes a uniform diameter portion 204E downstream of the water collection portion 202B, a collecting pipe reduced diameter portion 204B continuing downstream from the uniform diameter portion 204E, a swirl vane 204C provided in the collecting pipe reduced diameter portion 204B, and a (lower) standpipe connecting portion 204D provided at the lower end of the collecting pipe reduced diameter portion 204B.

[0036] Receiver members are appropriately attached to the drainage collecting pipe 200. Here, a receiver member 170 is attached to the (upper) standpipe connecting portion 202A, and one of receiver members 100, 150, 160 and 170 is attached to the horizontal branch pipe connecting portion 202C by fitting the receiver member to each connecting portion. Note that the receiver member 170 is provided to the (upper) standpipe connecting portion 202A, and the receiver members 100, 150 and 160 are not provided to the other portions. The reason for this is that the other receiving members 100, 150 and 160 have cutout portions 106 as shown in FIG. 8, which may hinder the uniform flow of wastewater in the vertical direction.

[0037] As shown in Figures 2 and 3, the leg joint 300 according to this embodiment is an example of a pipe member provided below the floor slab of the lowest floor. The leg joint 300 includes a bent portion 300C, a riser pipe connection portion 300A upstream of the bent portion 300C, and a horizontal main pipe connection portion 300B downstream of the bent portion 300C. A receiving member is appropriately attached to the leg joint 300. Here, a receiving member 170 is fitted and attached to the riser pipe connection portion 300A. The reason for providing the receiving member 170 to the riser pipe connection portion 300A is the same as the reason for providing the receiving member 170 to the (upper) riser pipe connection portion 202A.

[0038] As shown in Figures 4 to 8, the receiving member 100 of this embodiment is, as described above, made of synthetic resin (for example, PVC-U, rigid polyvinyl chloride) and has a generally hollow cylindrical shape, and is characterized by having a protruding stopper 102 that protrudes from the inner surface of the generally hollow cylindrical shape of the receiving member 100 and extends in the pipe axis direction, and an annular reduced diameter portion 104 or a protruding reduced diameter portion formed at the end of the stopper 102 on the pipe member side, and has a structure having the above-mentioned characteristics.

[0039] In addition to the above-described structure, as shown in Figures 4 to 8, the receiving member 100, receiving member 150 and receiving member 160 are composed of a pipe member-side short pipe section 110 connected to a pipe member (drainage collecting pipe 200, leg joint 300), a resin pipe-side short pipe section 120 connected to a synthetic resin drainage pipe (an upper vertical pipe 210 or horizontal branch pipe 220 and horizontal branch pipe 230 connected to the drainage collecting pipe 200, or a lowest floor drainage collecting pipe or a lower vertical pipe 240 (when the drainage collecting pipe 200 shown in Figure 1 is installed on the lowest floor) connected to the leg joint 300), and a flange section 130 between them. 9 and 10, pipe member-side short pipe section 110 is inserted until a predetermined connection section of the pipe member (drainage collecting pipe 200, leg joint 300) abuts against flange section 130, and receiving member 100, receiving member 150, and receiving member 160 are fitted together to establish a connected state in which the pipe member and receiving member are connected. Note that this function (insertion depth of receiving member into pipe member) of flange section 130 in receiving member 100, receiving member 150, and receiving member 160 is provided by pipe member-side step 132 of the reduced diameter section in receiving member 170, as shown in FIGS. 9 and 10.

[0040] 4 to 8 is provided on a drainage collecting pipe 200 as shown in FIGS. 1, 9 and 10, or on a leg joint 300 as shown in FIGS. 2 and 3, (1) The thermal expansion of the synthetic resin drain pipe connected to the pipe member (drainage collecting pipe 200, leg joint 300) via the receiving member 100 can be suitably absorbed (by allowing expansion from the stopper 102 to the annular reduced diameter portion 104 or the reduced diameter portion of the protrusion), (2) When connecting a synthetic resin drain pipe to a pipe member (a drainage manifold 200, a leg joint 300) via the receiving member 100, the abutment state between the stopper 102 and the synthetic resin drain pipe can be visually confirmed, thereby improving workability. (3) The notch 106 provided in the case of the annular reduced diameter portion 104 can prevent the drainage water from accumulating in the drainage collecting pipe from the horizontal branch pipe. (4) In drainage collecting pipes to which multiple horizontal branch pipes are connected, the lower end positions of the horizontal branch pipes can be aligned, and the height of the support members for the horizontal branch pipes can be made the same. do.

[0041] As described above, according to the receiving member, the drainage collecting pipe and the leg joint provided with the receiving member, and the connection method using the receiving member according to this embodiment, the pipe member (as an example, It is possible to achieve advantageous effects such as being able to effectively absorb thermal expansion of synthetic resin drainage pipes when connecting a synthetic resin drainage pipe (for example, an upper vertical pipe or horizontal branch pipe connected to a drainage collecting pipe, or a bottom floor drainage collecting pipe or vertical pipe connected to a leg joint) to a synthetic resin drainage pipe.

[0042] It should be noted that the embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. [Industrial Applicability]

[0043] The present invention is preferred when connecting a pipe component (drainage manifold, leg joint, etc.) to a synthetic resin drainage pipe, and is particularly preferred in that it can effectively absorb thermal expansion of the synthetic resin drainage pipe, thereby preventing damage to the pipe component due to thermal expansion. [Explanation of symbols]

[0044] 100, 150, 160, 170 Socket member 200 Drainage collection pipe 300, 310 Leg joints

Claims

1. A synthetic resin receiving member having a generally hollow cylindrical shape, used to connect a pipe member to a synthetic resin drainage pipe, a protruding stopper protruding from the inner surface of the substantially hollow cylindrical shape and extending in the tube axial direction; a ring-shaped or ridge-shaped reduced diameter portion formed at the end of the stopper on the pipe member side.

2. 2. The receiving member according to claim 1, wherein the stopper and the reduced diameter portion of the ridge are provided discretely on the circumferential surface of the inner surface.

3. 3. The receiving member according to claim 2, wherein the stoppers and the reduced diameter portions of the ridges are provided at approximately equal intervals on the circumferential surface of the inner surface.

4. The receiving member is fitted into the pipe member to establish a connected state in which the pipe member and the receiving member are connected, The receiving member is transparent, The receiving member according to any one of claims 1 to 3, characterized in that the abutment state between the drain pipe and the stopper can be visually confirmed in the connected state.

5. The receiving member is fitted into the pipe member to establish a connected state in which the pipe member and the receiving member are connected, The receiving member is transparent, A receiving member as described in any one of claims 1 to 3, characterized in that the starting end of the stopper on the drain pipe side is located closer to the drain pipe than the end of the pipe member in the connected state.

6. A drainage collecting pipe, characterized in that the receiving member according to any one of claims 1 to 5 is provided at a vertical pipe connecting section or a horizontal branch pipe connecting section, and that a swirl vane is provided inside.

7. The drain pipe is a horizontal branch pipe, and the pipe member is the drain collecting pipe, The drainage collecting pipe according to claim 6, wherein the stopper and the reduced diameter portion provided on the receiving member are not present below the receiving member.

8. The drainage collecting pipe according to claim 7, wherein the receiving member has a notch on the lower side on the drainage collecting pipe side.

9. A drainage collecting pipe as described in any one of claims 6 to 8, characterized in that the inner diameter of the receiving member may differ between the drainage collecting pipe side and the side of the horizontal branch pipe, and the pipe axis of the horizontal branch pipe side is eccentric downward relative to the pipe axis of the drainage collecting pipe side.

10. A leg joint, characterized in that the receiving member according to any one of claims 1 to 5 is provided at a riser pipe connection section.

11. The leg joint according to claim 10, characterized in that the drain pipe is a lowest floor drainage manifold or a standpipe, and the pipe member is the leg joint.

12. A connection method for connecting a pipe member to a synthetic resin drainage pipe, the pipe member includes a transparent receiving member made of synthetic resin and having a substantially hollow cylindrical shape; The receiving member is fitted into the pipe member to connect the pipe member and the receiving member, the receiving member includes a protruding stopper that protrudes from the inner surface of the substantially hollow cylindrical shape and extends in the pipe axial direction, and an annular or protruding reduced diameter portion that is formed at the end of the stopper on the pipe member side, The connection method includes: A step of abutting an outer peripheral surface of the drain pipe against an inner peripheral surface of the receiving member on the drain pipe side of the receiving member and starting to insert the drain pipe into the receiving member; A step of visually determining whether the end surface of the drain pipe and a stopper provided on the inner surface of the receiving member as a protrusion are in contact with each other through the transparent receiving member; A connection method characterized by including a step of terminating insertion of the drain pipe into the receiving member when it is determined that the end face of the drain pipe abuts against the stopper.

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