Leg part joint and drain piping structure

Abstract

To provide a leg part joint for an undermost layer, which enables construction time at construction site to be decreased by a small number of components.SOLUTION: A leg part joint 100 includes a body part 101 having a vertical pipe connection part 110 to which a substantially cylindrical connection member 310 having a vertical pipe connection member 320 to be connected to a vertical pipe 1100 above a top face of a floor slab S of an undermost layer on a top edge, a horizontal pipe connection part 120 to be connected to a horizontal main pipe 1200, and a bend part 130 to connect the vertical pipe connection part 110 and the horizontal pipe connection part 120 by changing direction so that a pipe axis direction of the vertical pipe connection part 110 is orthogonal to a pipe axis direction of the horizontal pipe connection part 120. The leg part joint 100 includes the vertical pipe connection member 320 described above and the connection member 310 described above in addition to the body part 101, which are integrated at a bonded and joint part. The connection member 310 has a part to be buried in the floor slab S of the undermost layer.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a resin leg joint that connects the downstream end of a vertical pipe that runs through each floor to the upstream end of a horizontal main pipe that runs horizontally under the floor slab of the lowest floor in the drainage equipment of a building with multiple floors.In particular, the present invention relates to a leg joint and drainage piping structure that uses a small number of parts and can shorten the construction work, and is installed under a floor slab where piping is connected only vertically above the floor slab. [Background technology]

[0002] In the drainage systems of buildings with multiple floors, such as high-rise apartment buildings, the wastewater from each floor flows down a drainage stand pipe system that runs through each floor, and is then led outdoors via a horizontal main drain pipe that runs horizontally under the floor slab of the lowest floor.To connect the lower end of the drainage stand pipe system to the upstream end of the horizontal main drain pipe, a leg joint that bends in an arc from vertical to horizontal is used.

[0003] A drainage piping structure using such leg joints, which improves the fit of the piping according to the slab thickness of the lowest floor slab while suppressing cost increases, and also makes construction management easier, is disclosed in Patent Publication No. 2019-073969 (Patent Document 1). The drainage piping structure disclosed in Patent Document 1 is a drainage piping structure installed on the lowest floor slab, and comprises: a collective joint having a branch pipe connection portion connectable to a horizontal branch pipe arranged above the lowest floor slab, and a cylindrical lower connection portion extending downward formed below the branch pipe connection portion; a curved leg joint connected to a horizontal main pipe arranged below the lowest floor slab; a connecting vertical pipe having a straight outer shape and at least a portion of which is embedded in the lowest floor slab to connect the lower connection portion and the leg joint; and a connecting joint having an upper receiving portion into which the lower connection portion can be inserted and a lower receiving portion into which the upper end of the connecting vertical pipe can be inserted, characterized in that the lower receiving portion into which the upper end of the connecting vertical pipe is inserted is embedded in the lowest floor slab, and the lower connecting portion is inserted into the upper receiving portion, at least a portion of which protrudes above the top surface of the lowest floor slab.

[0004] According to this drainage piping structure, the lower connection part of the collective joint and the leg joint are connected via a connecting vertical pipe rather than directly, so that a short connecting vertical pipe is prepared when the slab thickness of the lowest floor slab is thin, and a long connecting vertical pipe is prepared when the slab thickness of the lowest floor slab is thick, thereby realizing a drainage piping structure that corresponds to the slab thickness of the lowest floor slab. In other words, according to this drainage piping structure, since there is no need to manufacture a special collective joint even if the slab thickness of the lowest floor slab changes, it is possible to improve the fit of the piping according to the slab thickness of the lowest floor slab while suppressing increases in manufacturing costs. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2019-073969 Summary of the Invention [Problem to be solved by the invention]

[0006] However, for the lowest floor disclosed in Patent Document 1, the lower connection part of the collective joint and the leg joint are connected via a connecting joint and a connecting vertical pipe. However, if the horizontal branch pipe is not connected above the floor slab of the lowest floor, the vertical pipe and the leg joint are connected (pipes exist only vertically above the floor slab). However, since the drainage piping structure disclosed in Patent Document 1 requires a configuration in which the collective joint is located above the floor slab, the horizontal branch pipe of the collective joint is not connected. This method has the problem of requiring a cap to be placed on the horizontal branch pipe connection because a branch pipe connection is no longer necessary. Another problem is that the use of a collecting joint increases the number of parts. Furthermore, the drainage piping structure disclosed in Patent Document 1 involves transporting the collecting joint, connecting vertical pipe, connecting joint, and leg joint to the construction site, (1) cutting the connecting vertical pipe to the optimal length, (2) adhesively joining the cut connecting vertical pipe to the leg joint, (3) adhesively joining the opposite end of the connecting vertical pipe adhesively joined to the leg joint to the connecting joint, (4) adhesively joining the leg joint to the horizontal main pipe, and (5) adhesively joining the opposite end of the connecting joint adhesively joined to the connecting vertical pipe to the collecting joint, thereby completing the construction of the drainage piping structure. In other words, in addition to having to cut the connecting vertical pipe at the construction site, there is the problem of having to adhesively join four locations, which increases the construction time.

[0007] The present invention was developed in consideration of the above-mentioned problems, and its purpose is to provide a leg joint and drainage piping structure for the lowest floor that requires a small number of parts and can shorten construction time at the construction site. [Means for solving the problem]

[0008] In order to achieve the above object, the leg joint according to the present invention employs the following technical measures. A leg joint according to one aspect of the present invention is a leg joint for the lowest floor made of resin, which connects the downstream end of a standpipe piped through each floor to the upstream end of a horizontal main pipe piped horizontally below the floor slab of the lowest floor in the drainage equipment of a building having multiple floors, and which has a longer pipeline on the standpipe side than on the horizontal main pipe side, and which is composed of a plurality of members which are integrated together with adhesive joints, and which includes: a standpipe connection portion to which is connected a substantially cylindrical connection member having at its upper end a standpipe connection member which is connected to the standpipe above the top surface of the floor slab; a horizontal pipe connection portion connected to the horizontal main pipe; a main body portion which includes: a standpipe connection portion to which is connected a substantially cylindrical connection member having at its upper end a standpipe connection member which is connected to the standpipe above the top surface of the floor slab;

[0009] Preferably, at least one of the standpipe connection portion and the standpipe connection member can be configured to include, in addition to the connection member, a portion that is embedded in the floor slab of the lowest layer. More preferably, when the thickness of the floor slab is 100 mm or more, the distance between the upper end surface of the vertical pipe connecting member and the lower surface of the floor slab can be configured to be 150 mm or more. More preferably, the standpipe connection portion and the connection member can be configured to be connected via a substantially annular standpipe receptacle below the upper surface of the floor slab.

[0010] More preferably, the standpipe receptacle can be configured to have a protrusion at the lower end on the inner periphery of the substantially annular shape. More preferably, the standpipe receiving port can be configured to move the pipe core of the standpipe toward or away from the horizontal pipe connecting portion to make the pipe core eccentric. More preferably, the member located above the standpipe connecting portion can be made of a transparent resin. More preferably, the standpipe connecting member and the connecting member may be configured to be integrally formed as a connecting member, or to be formed as separate bodies.

[0011] More preferably, at least one of the outer peripheral surface of the standpipe connecting portion of the main body, the outer peripheral surface of the connecting member, and the outer peripheral surface of the standpipe connecting member is provided with a hanging support member that suspends and supports the leg joint from the underside of the floor slab, or a lifting support member that lifts and supports the leg joint from the upper surface of the floor slab, at least in part of the circumferential direction. The upper projection may be provided in contact with the upper projection. More preferably, the outer surface of the horizontal pipe connection portion of the main body can be configured to have a lower protrusion in at least a portion of its lower half in the circumferential direction that abuts against a hanging support member that supports the leg joint by suspending it from the underside of the floor slab, or a lower support member that lifts and supports the leg joint from below.

[0012] A drainage piping structure according to yet another aspect of the present invention is characterized in that any of the leg joints described above is installed below the lowest floor slab, and piping is connected only vertically above the lowest floor slab. Preferably, in the drainage piping structure relating to this aspect, the hanging support member is arranged in abutment against the upper protrusion portion so that the leg joint is suspended and supported from the underside of the floor slab, or the lifting support member is arranged in abutment against the upper protrusion portion so that the leg joint is lifted and supported from the upper surface of the floor slab.

[0013] More preferably, in the drainage piping structure relating to this aspect, the same hanging support member and the same lifting support member can be configured to be used regardless of whether or not an outer layer member is attached to the leg joint, the type of the outer layer member, and the type of vertical pipe connected to the leg joint. More preferably, in the drainage piping structure relating to this aspect, the hanging support member can be configured to abut against the lower protrusion portion so that the leg joint is suspended and supported from the underside of the floor slab, or the lower support member can be configured to abut against the lower protrusion portion so that the leg joint is lifted from below and supported. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide a leg joint and a drainage piping structure that uses a small number of parts and can shorten the construction time at the construction site. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a side view (outline view and cross-sectional view) showing a drainage piping structure in which a leg joint according to an embodiment of the present invention is installed close to a thin floor slab of the lowest floor. [Figure 2] 1 is a side view (outline drawing) showing a drainage piping structure in which a leg joint according to an embodiment of the present invention is installed close to a thick floor slab of the lowest floor. FIG. [Figure 3] 1 is a side view (cross-sectional view) showing a drainage piping structure in which a leg joint according to an embodiment of the present invention is installed close to a thick floor slab of the lowest floor. [Figure 4] A side view (outline view and cross-sectional view) of a drainage piping structure in which the pipe cores of the vertical pipe and connecting member are off-center relative to the pipe core of the vertical pipe connection part of the leg joint in a leg joint equipped with a connecting member of which length is not limited, and a cross-sectional view and oblique view of the vertical pipe receptacle. [Figure 5] A side view (outline drawing and cross-sectional view) of a drainage piping structure in which the pipe cores of the standpipe and connecting member are not offset from the pipe core of the standpipe connection part of the leg joint in a leg joint equipped with a connecting member whose length is not limited, a cross-sectional view of the standpipe receptacle, and a partial cross-sectional view when the standpipe receptacle is not used. [Figure 6]FIG. 1A is a partial cross-sectional view of a drainage piping structure in which the vertical pipe connecting member and the connecting member are (A) formed as separate pieces, and (B) is a partial cross-sectional view of a drainage piping structure in which the vertical pipe connecting member and the connecting member are (B) formed as a single piece as a connecting member. [Figure 7] This is a diagram showing the state in which the leg joint is lifted and supported from the floor slab by the lifting support member. [Figure 8] FIG. 10A is a front view of a leg joint with an upper protrusion and a lower protrusion, (B) is a side view of the leg joint with an eccentricity, and (C) is a side view of the leg joint without an eccentricity. [Figure 9] FIG. 10 is a side view of a leg joint having upper protrusions around the entire circumference. [Figure 10] 10B is a two-view diagram of the main body of the leg joint (front outline view and side 10B cross-sectional view). FIG. [Figure 11] 10A and 10B are diagrams for explaining a water film cutting protrusion. [Figure 12] 10A and 10B are diagrams for explaining a state in which a water film is cut by a water film cutting protrusion. [Figure 13] FIG. 5 is a diagram for explaining the reason why the pipe core of the vertical pipe is made eccentric by approaching the horizontal pipe connecting portion in FIGS. 1 to 4. [Figure 14] A side view of the main body of the leg joint including an outer layer member, where (A) is a diagram showing the outline of the leg joint plus a cross-sectional view of the outer layer member, and (B) is a diagram showing the cross-sectional view of the leg joint plus a cross-sectional view of the outer layer member. [Figure 15] 15A and 15B are side views of the leg joint shown in FIG. 14 with a support member attached, where (A) is a view in which an outline drawing of the leg joint is added to an outline drawing of the support member, and (B) is a view in which a cross-sectional view of the outer layer member is added to the outline drawing of the leg joint (up to this point in FIG. 14A) and a part of the support member is seen through. [Figure 16] This is a diagram in which a cross-sectional view of a lower support member is added to FIG. 15(B). [Figure 17] This is a side view showing the state in which the leg joint is lifted and supported by a lifting support member using the upper protrusion of the vertical pipe connecting member, and is suspended and supported by a hanging support member using the upper protrusion of the main body. [Figure 18] 18 is a side view of the leg joint in FIG. 17 with an outer layer member shown in cross section. [Figure 19] This is a side view showing the state in which the leg joint is lifted and supported by the lifting support member using the upper protrusion of the vertical pipe connecting member, and is suspended and supported by the hanging support member using the lower protrusion of the main body. [Figure 20] A side view showing the state in which the leg joint is suspended and supported by a hanging support member using the upper protrusion of the main body part, and also suspended and supported by a hanging support member using the lower protrusion of the main body part. [Figure 21] This figure shows the state in which the leg joint is suspended and supported by a suspension support member using the upper protrusion of the main body, and is supported downward from the floor slab by a lower support member using the lower protrusion of the main body. [Figure 22] 1 is a side view (outline drawing) showing a drainage piping structure in which a leg joint according to an embodiment of the present invention is installed close to a thin floor slab of the lowest floor. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] A leg joint 100 according to an embodiment of the present invention will be described in detail below with reference to Figures 1 to 21. The drainage piping structure according to the embodiment of the present invention is constructed by installing the leg joint 100 according to the present embodiment shown in Figures 1(B), 3 to 6, and 8 to 16 under the floor slab S of the lowest level of a building, as shown in Figures 1(A), 2, 7, and 17 to 21, with piping connected only in the vertical direction above the floor slab S of the lowest level, and with thermal expansion material TE present at the position of the floor slab S, as shown in Figures 1 and 2. The gap between the drainage piping and the through-hole in the floor slab S through which the drainage piping is inserted is filled with mortar M.

[0017] In the following description, the outer peripheral surface, the outer surface, and the outside, the outer layer side, the outer peripheral side, and the outside, the inner layer side, the inner peripheral side, and the inside, and the thermally expandable material and the thermally expandable fire-resistant material may not be clearly distinguished. Also, in cross-sectional views, different components may not be clearly distinguished depending on the type of hatching. Furthermore, in the drawings referred to in the following description, for easy understanding of the present invention, parts that should be represented by their external shapes rather than their internal shapes may be represented as if they are seen through the interior, parts that should be represented by their cross sections rather than their external shapes may be represented by their external shapes, parts that should be represented by their external shapes rather than their cross sections may be represented by their cross sections, cross sections may not be hatched, cross sections may be hatched even if they are not cross sections, detailed structures may be omitted, and drawings may not match even for the same components due to the omission or modification of detailed structures. Also, broken lines may be drawn. In the following, floor slab S means the floor slab S of the lowest layer, even if there is no mention of the lowest layer before it.

[0018] <Outline of leg joint 100 and support structure> With reference to Figs. 1 to 21, a leg joint 100 according to this embodiment and a support structure for the leg joint 100 will be outlined below. As shown in these figures, this leg joint 100 is a resin leg joint that connects the downstream end of a vertical pipe 1100 that is piped through each floor in the drainage system of a building with multiple floors to the upstream end of a horizontal main pipe 1200 that is piped horizontally below the floor slab S (thickness t(S)) of the lowest floor.

[0019] This leg joint 100 comprises a main body 101 which comprises a stand pipe connecting section 110 to which is connected a substantially cylindrical connecting member 310 which has at its upper end a stand pipe connecting member 320 which is connected to a stand pipe 1100 above the upper surface of the floor slab S, a horizontal pipe connecting section 120 which is connected to a horizontal main pipe 1200, and a curved pipe-shaped bend section 130 which changes direction so that the pipe axis direction of the stand pipe connecting section 110 and the pipe axis direction of the horizontal pipe connecting section 120 are perpendicular to each other and connects the stand pipe connecting section 110 and the horizontal pipe connecting section 120. In addition to this main body 101, the leg joint 100 further includes the stand pipe connecting member 320 and the connecting member 310 described above. In this way, the leg joint 100 is composed of these multiple components (in addition to the main body 101, standpipe connecting member 320, and connecting member 310 described above, it may also include the standpipe socket 300 described below, and further, the standpipe connecting member 320 may be a connecting member 311 configured as part of the connecting member), and these multiple components are joined together at adhesive joints with adhesive or the like to form a single unit. The leg joint 100 may also further include outer layer components (such as vibration damping material 160, vibration insulator (sound absorbing material 150), sound insulation material 152, etc.) described below. A characteristic structure is that the connecting member 310 has a portion where it is embedded in the lowest floor slab S.

[0020] In this way, the main body 101, the stand pipe connecting member 320, and the connecting member 310 (and the stand pipe receptacle 300) of the leg joint 100 are joined together by adhesive joints at a manufacturing site, not at a construction site, and therefore, at the construction site, the stand pipe 1100 is connected to the stand pipe connecting member equivalent portion of the stand pipe connecting member 320 of the leg joint 100 or the connecting member 311 (where the stand pipe connecting member and the connecting member are integrated as a connecting member), and the horizontal main pipe 1200 is connected to the horizontal pipe connecting portion 120 of the main body 101 of the leg joint 100. Furthermore, because the connecting member 310 has a portion that is embedded in the floor slab S of the lowest layer, the leg joint 100 can be constructed close to the underside of the floor slab S, and the fitting dimension L(1) can be reduced. For example, when the nominal diameter of the horizontal main pipe 1200 is 150A, and the connecting member 310 (only) has a portion that is embedded in the lowest floor slab S, as shown in Figure 22, the fitting dimension L(1) is 323 mm, which is the best fitting case in the construction example using the leg joint 100 of this embodiment.

[0021] Furthermore, at least one of the standpipe connecting portion 110 and the standpipe connecting member 320 has, in addition to the connecting member 310, a portion that is embedded in the floor slab S of the lowest layer. For example, an example of a drainage piping structure in which only the connecting member 310 is embedded in the lowest floor slab S is shown in Figures 17, 18, and 22, an example of a drainage piping structure in which the connecting member 310 and the standpipe connection portion 110 of the main body 101 are embedded in the lowest floor slab S is shown in Figures 7 and 19, an example of a drainage piping structure in which the connecting member 310 and the standpipe connection member 320 are embedded in the lowest floor slab S is shown in Figures 20 and 21, and an example of a drainage piping structure in which the connecting member 310, the standpipe connection portion 110 of the main body 101, and the standpipe connection member 320 are embedded in the lowest floor slab S is shown in Figures 1(A) and 2, respectively.

[0022] In this way, since at least a portion of the connecting member 310 is embedded in the floor slab S of the lowest layer, the leg joint 100 can be installed close to the underside of the floor slab S. As shown in FIG. 1(A) and FIG. 2, when the thickness t(S) of the bottom floor slab S is 100 mm or more, the distance L(B) between the upper end surface of the riser connection member 320 and the lower surface of the bottom floor slab S becomes 150 mm or more. The nominal diameter of the horizontal main pipe 1200 is 150A. Further, the distance L(2) between the pipe core of the horizontal pipe connection portion 120 of the main body portion 101 of the leg joint 100 and the lower surface of the bottom floor slab S is 89 mm or more. Thus, the leg joint 100 can be constructed close to the lower surface of the floor slab S.

[0023] Here, since the riser 1100 is connected to the riser connection member 320 above the upper surface of the bottom floor slab S, t(S) < L(B). Also, at the construction site, since the riser 110 (which is a member constituting the leg joint 100) is connected to the riser connection member 320 above the upper surface of the bottom floor slab S in this way (so as not to be connected within the floor slab S), it becomes easy to confirm whether the riser 110 and the leg joint 100 are reliably connected, and defects such as water leakage can be suppressed.

[0024] The riser connection portion 110 of the main body portion 101 and the connection member 310 are connected via a substantially annular riser receiving port 300 below the upper surface of the bottom floor slab S. Note that this riser receiving port 300 is an arbitrary configuration of the leg joint 100, and (as shown in FIG. 5(D)) the riser connection portion 110 of the main body portion 101 and the connection member 310 (more specifically, the connection members 312 and 314 and the connection member 316 having a different pipe diameter) may be adhesively joined without using the riser receiving port.

[0025] This riser receiving port has protrusions 300T (here, four at 90-degree intervals) at the lower end on the inner peripheral side of the substantially annular shape (as shown in FIGS. 4(C), 4(D), 5(C), etc.). Therefore, the vertical direction of the connection member 310 can be positioned only by inserting it until the lower end of the connection member 310 abuts against the protrusions 300T. This standpipe receptacle 300 includes a standpipe receptacle 304 (shown in Figs. 1 to 4) that moves the pipe core of the standpipe 1100 closer to or farther away from the horizontal pipe connecting portion 120 to make it eccentric, and a standpipe receptacle 302 (shown in Fig. 5) that does not move it eccentrically. Note that, as shown in Figs. 1 to 6, the pipe core of the standpipe 1100, the pipe core of the connecting member 310, and the pipe core of the standpipe connecting member 320 are assumed to be aligned.

[0026] Furthermore, standpipe receptacle 304 corresponds to standpipe 1104 having a nominal diameter of 100A, in which case the connecting member is connecting member 314 and the standpipe connecting member is standpipe connecting member 324, and standpipe receptacle 302 corresponds to standpipe 1102 having a nominal diameter of 125A, in which case the connecting member is connecting member 312 and the standpipe connecting member is standpipe connecting member 322. Note that when describing without distinguishing between standpipe 1104 and standpipe 1102, it will be referred to as standpipe 1100; when describing without distinguishing between standpipe receptacle 304 and standpipe receptacle 302, it will be referred to as standpipe receptacle 300; when describing without distinguishing between connecting member 314 and connecting member 312, it will be referred to as connecting member 310; and when describing without distinguishing between standpipe connecting member 324 and standpipe connecting member 322, it will be referred to as standpipe connecting member 320.

[0027] In the leg joint 100, the member located above the standpipe connection part 110 of the main body part 101 is made of transparent resin. This allows visual confirmation when connecting the piping on site, making installation easier. The standpipe connecting member 320 and the connecting member 310 are integrally formed as a connecting member 311 as shown in Fig. 6(B), or are formed as separate bodies as shown in Fig. 6(A). In order to connect to the standpipe 1100, a rubber ring is attached to an upper space 320G of the standpipe connecting member 320 or an upper space 311G of the part of the connecting member 311 that corresponds to the standpipe connecting member. It is also preferable to connect the standpipe 1100 with a rubber ring.

[0028] At least one of the outer circumferential surfaces of the standpipe connecting portion 110 of the main body 101, the outer circumferential surface of the connecting member 310, and the outer circumferential surface of the standpipe connecting member 320 is provided with an upper protrusion 112 at at least a portion of the circumferential direction. Here, in FIG. 8, the upper protrusion 112 is provided on the outer circumferential surface of the standpipe connecting portion 110 of the main body 101 and the outer circumferential surface of the standpipe connecting member 320. Note that the upper protrusion 112 of the standpipe connecting portion 110 may also be referred to as the upper protrusion 112 of the main body 101. Furthermore, the upper protrusion 112 provided on at least one of the outer circumferential surfaces of the main body 101, the outer circumferential surface of the connecting member 310, and the outer circumferential surface of the standpipe connecting member 320 have the same characteristics except for the outermost diameter length LL shown in FIG. 8, and therefore will be described in detail below with reference to FIGS. 10 and 14 to 16. A hanging support member 170D that supports the leg joint 100 by suspending it from the underside of the floor slab S as shown in Figures 17, 18, 20, and 21, or a lifting support member 170U that supports the leg joint 100 by lifting it from the upper surface of the floor slab S as shown in Figures 7, 17, 18, and 19, is provided in contact with the upper protrusion 112. Note that, for reasons that will be described later (the same (type of) support member can be used regardless of the presence or absence and type of outer layer member, so that the band portion 172 of the support member 170 can abut against the upper protrusion 112 exposed from the outer layer member), when describing the hanging support member 170D and the lifting support member 170U without distinguishing between them, they will be referred to as support member 170.

[0029] A lower protrusion 122 is provided on at least a portion of the lower half in the circumferential direction of the outer peripheral surface of the horizontal pipe connection portion 120 of the main body 101. A hanging support member 180D that supports the leg joint 100 by suspending it from the underside of the floor slab S as shown in Figures 19 and 20, or a lower support member 180US that supports the leg joint 100 by lifting it from below (here, the concrete foundation C below the lowest floor slab S) as shown in Figure 21, is provided in contact with the lower protrusion 122. Note that for reasons described below (support stabilization due to the abutment of horizontal surfaces), when there is no need to distinguish between the hanging support member 180D and the lower support member 180US, they will be referred to as support member 180.

[0030] This lower protrusion 122 has two or more rib shapes (four are shown in Figure 8(B) and elsewhere). The lower protrusion 122 is located closer to the horizontal pipe connection part 120 than the pipe core of the stand pipe connection part 110. Furthermore, this lower protrusion 122 has a horizontal surface 122L (shown in the enlarged view of Figure 8(A)) that is parallel to the slab that forms the floor or ceiling of each floor of the building. This horizontal surface 122L abuts against a horizontal surface 180L (shown in the enlarged view of Figure 16) of the support member 180 (here, an angle iron), allowing the support member 180 to stably support the leg joint 100.

[0031] The lifting support member 170U is fixed with a nut N to a cut bolt (fully threaded bolt) B erected from a bolt base BB provided on the upper surface of the floor slab S, while the hanging support member 170D is supported by fixing the hanging support member 170D with a nut N to a short cut bolt B using an anchor bolt (sleeve) AB buried in the underside of the floor slab. However, since the lifting support member 170U and the hanging support member 170D are the same in the following points, they will be simply referred to as support member 170 when there is no need to distinguish between them.

[0032] Here, the band portion 172 (for example, a combination of semicircular ring-shaped bands) of the support member 170 is abutted against the upper protrusion 112 (which is exposed from the outer layer member as described later), and the support member 170 is attached to the leg joint 100 by a fastening member 174 (for example, a member that screws together the combination of semicircular ring-shaped bands with a bolt and nut) of the support member 170. Also, the support member 170 is attached to the leg joint 100 in a state where the combination of semicircular ring-shaped bands is integrated. It has a circular cut bolt hole portion through which cut bolt B is inserted.

[0033] Furthermore, the lower support member 180US provides downward support from a concrete foundation C further below the floor slab S, while the hanging support member 180D is different in that it is supported by anchor bolts AB embedded in the underside of the floor slab and fixed to a long cut bolt B with a nut N; however, the lower support member 180US and the hanging support member 180D are similar in that the horizontal surface 180L abuts against the horizontal surface 122L of the lower protrusion 122 to provide stable support, and therefore when there is no need to distinguish between them, they will simply be referred to as support member 180.

[0034] As will be described in more detail later, this leg joint 100 further includes an outer layer member (more specifically, sound-absorbing material 150 shown in FIG. 14 etc.) for at least achieving sound insulation, and (the outermost diameter of) this upper protrusion 112 protrudes from the outer peripheral surface of the outer layer member (the outermost diameter of the sound-absorbing material 150). Furthermore, although not limited thereto, the upper protrusion 112 is present in part of the circumferential direction (here, four locations at 90-degree intervals), and the outer layer member (here, sound-absorbing material 150) has openings at the positions of the upper protrusions 112.

[0035] 8 and 10(A), and the outer layer member (here, sound-absorbing material 150 or sound-insulating material 152 in addition to sound-absorbing material 150) has openings at four locations at 90-degree intervals where upper protrusions 112 are present, each opening having a width slightly larger than width W and a height slightly larger than height H, and the outer layer member and upper protrusions 112 do not overlap, so that upper protrusions 112 are located at the outermost position where they are supported by support member 170 (thickness of outer layer member<length L of upper protrusions 112). Note that support member 170 is composed of band portion 172 and fastening member 174 shown in FIG. 7, for example, and because the height of band portion 172 is about 30 mm, the height H of upper protrusions 112 is preferably about 12 mm to 20 mm.

[0036] For this reason, even if the outer diameter of the leg joint 100 at the position supported by the support member 170 varies due to (1) whether or not an outer layer member (such as vibration-damping material 160, vibration insulator (sound-absorbing material 150), sound-proofing material 152, etc.) being attached to the leg joint 100, (2) the type of this outer layer member being different, or (3) the type of standpipe or collecting pipe connected to the leg joint being different, the same support member 170 can be used because the support member 170 is provided in contact with the upper protrusion 112. Here, being able to use the same upper support member 170 means that the same type of upper support member 170 can be used (not that a single upper support member 170 is used to support multiple support locations) and that the specifications of the upper support member 170 can be standardized.

[0037] In the case of (3) above, it is necessary to make the outermost diameter lengths LL of the upper protrusions 112 the same. This (3) means that LL(1) = LL(2) = LL(3) in FIG. 8. However, this embodiment includes construction drawings (FIGS. 17 to 21) that do not satisfy this (3). This point will not be explained again below. Furthermore, since the outer layer member has an opening, positioning can be performed reliably and easily by aligning the opening with the position of the upper protrusion 112.

[0038] In a drainage piping structure using a leg joint 100 having such an upper protrusion 112, the leg joint 100 can be stably supported by a configuration in which a hanging support member 170D for supporting the leg joint 100 by suspending it from the underside of the floor slab S abuts the upper protrusion 112, and the leg joint 100 is stably supported, or a lifting support member 170U for lifting and supporting the leg joint 100 from the upper surface of the floor slab S abuts the upper protrusion 112, and the leg joint 100 can be stably supported. In this case, the same (type of) support member 170 can be used regardless of whether or not an outer layer member is attached to the leg joint 100, the type of outer layer member, and the type of vertical pipe 1100 connected to the leg joint 100.

[0039] In a drainage piping structure using a leg joint 100 having such a lower protrusion 122, the leg joint 100 can be stably supported by a configuration in which a hanging support member 180D for supporting the leg joint 100 by suspending it from the underside of the floor slab S abuts the lower protrusion 122, and the leg joint 100 is stably supported, or a lower support member 180US for supporting the leg joint 100 from below (for example, a concrete foundation C below the lowest floor slab S) abuts the lower protrusion 122, and the leg joint 100 can be stably supported.

[0040] This upper protrusion 112 is located above the pipe core of the horizontal pipe connection part 120. This is therefore preferable in that the leg joint 100 can be suspended from the floor slab using anchor bolts AB and short cut bolts B, etc., which are embedded in the underside of the floor slab (second floor floor slab S2). In other words, the suspension support structure using the suspension support member 170D with the upper protrusion 112 requires shorter cut bolts B and is more stable than the suspension support structure using the suspension support member 180D with the lower protrusion 122 shown in Figure 20.

[0041] The leg joint 100 further includes an outer layer member for achieving at least sound insulation and vibration damping. Here, the vibration damping material 160 and the vibration insulator (sound absorbing material 150) are considered to be essential, and the sound insulating material 152 is considered to be optionally included. Here, as an example, these materials include butyl rubber as the vibration damping material 160, polyethylene terephthalate felt (a nonwoven fabric made of PET) as the sound absorbing material 150, and soft polyvinyl chloride as the sound insulating material 152. In this leg joint 100, the vibration damping material 160 is present at the curved surface portion of the bend portion 130 (a position where the wastewater flow that flows down the standpipe hits), but the vibration damping material 160 as an outer layer member for achieving vibration damping is not present at the position of the lower protrusion portion 122, and instead the sound absorbing material 150 or the sound insulating material 152 in addition to the sound absorbing material 150 is present as an outer layer member for achieving sound insulation. In other words, the lower protrusion 122 does not overlap with the vibration-damping material 160 but at least overlaps with the sound-absorbing material 150, and therefore the lower protrusion 122 abuts against the support member 180 (here, the angle bar) via the sound-absorbing material 150, thereby providing a vibration-damping effect.

[0042] The leg joint 100 also has a water film cutting protrusion 140 (shown in FIG. 11, etc.) for cutting the water film on the main body 101. This water film cutting protrusion 140 is provided at or near the intersection between the pipe wall of the stand pipe connecting part 110 on the side of the horizontal pipe connecting part 120 and the pipe wall of the horizontal pipe connecting part 120 on the side of the stand pipe connecting part 110. Because the water film formed by the wastewater that falls from the standpipe onto the leg joint can be cut by this water film cutting protrusion 140, the water film formed by the wastewater that falls from the standpipe onto the leg joint 100 is cut (an air layer is maintained within the leg joint 100 when the wastewater is discharged from the standpipe, preventing the leg joint 100 from being filled with wastewater), making it difficult for negative pressure to form within the standpipe even when the wastewater is discharged from the leg joint 100 at high speed, and difficult for positive pressure to form within the standpipe even when the wastewater is discharged from the leg joint 100 at low speed, thereby preventing unexpected negative or positive pressure within the standpipe. This prevents water seal failure, which would otherwise occur if water accumulated in the drain trap is sucked into the standpipe due to high negative pressure within the standpipe, or if water accumulated in the drain trap is sprayed into the room due to high positive pressure within the standpipe.

[0043] This water film cutting projection 140 is formed from a single projection, and is formed from a single projection having a substantially triangular shape in a front view seen from the pipe core of the vertical pipe connection part 110 toward the horizontal pipe connection part 120 (shown in an enlarged view of area A(1) in FIG. 11). In this way, the water film cutting projection 140 is provided on the thick main body part of the leg joint 100 (is a separate member from the main body part of the leg joint). The water film cutting protrusion 140 is integrated with the main body of the leg joint 100 (rather than being separated from the main body of the leg joint 100). This eliminates the need to prepare the water film cutting protrusion 140 separately from the main body of the leg joint 100, and since the water film cutting protrusion 140 is integrated with the thick main body, sufficient strength can be ensured. Furthermore, the water film cutting protrusion 140 has a substantially triangular cross section, and despite being a simple single structure, it can efficiently cut the water film and create a space below the water film cutting protrusion 140 through which air can pass. In addition, in order to ensure that the flowing water hits the water film cutting projection 140, the leg joint 100 has the following configuration.

[0044] The leg joint 100 further includes a standpipe socket 300 provided between the standpipe or collecting pipe and the standpipe connection part 110. This standpipe socket 300 can move the pipe core of the standpipe or collecting pipe toward the horizontal pipe connection part 120 (as shown in FIG. 13(A)) or away from it (as shown in FIG. 13(B)) to cause it to be off-center. Here, when the inner diameter of the standpipe is smaller than the inner diameter of the standpipe connection part 110, this standpipe socket 300 moves the pipe core of the standpipe or collecting pipe toward the horizontal pipe connection part 120 to cause it to be off-center. For example, when the standpipe connection part 110 corresponds to a standpipe with a nominal diameter of 125A and a standpipe with a nominal diameter of 100A is to be connected to the standpipe connection part 110, a standpipe socket 304 (shown in FIGS. 1 to 4) is used to move the pipe core of the standpipe toward the horizontal pipe connection part 120 (as shown in FIG. 13(A)) to cause it to be off-center. Therefore, even if the pipe diameter of the vertical pipe connected to the leg joint 100 becomes smaller, as long as a different vertical pipe receiving port 300 is prepared using the same main body 101, the flowing water can be reliably directed at the water film cutting protrusion 140.

[0045] Here, for example, the leg joint disclosed in JP 2021-162095 A does not have a water film cutting protrusion on the main body of the leg joint, but instead has a protrusion for cutting the water film on the adapter body of the adapter, which includes an adapter body, an elastic ring, and a fixing member, and is composed of four parts. On the other hand, the leg joint 100 according to the present embodiment is composed of two parts: the leg joint 100 with a water film cutting protrusion 140 on its main body, and a standpipe receptacle 300 prepared according to the diameter of the standpipe. Therefore, the leg joint 100 according to the present embodiment has a small number of parts (in addition to being excellent in strength), which reduces the assembly process.

[0046] In addition to the effect of ensuring that the flowing water hits the water film cutting protrusion 140, when the pipe diameter of the vertical pipe connected to the leg joint 100 becomes small, the reason why it is preferable to have it close to the horizontal pipe connection part 120 (as shown in Figure 13(A)) rather than away from it (as shown in Figure 13(B)) will be explained later. In a drainage piping structure using a leg joint 100 equipped with such a water film cutting protrusion 140, if the inner diameter of the standpipe is smaller than the inner diameter of the standpipe connection part, the pipe core of the standpipe can be installed eccentrically by bringing it close to the horizontal pipe connection part.Even if the pipe diameter of the standpipe connected to the leg joint 100 becomes small, a drainage piping structure can be realized in which flowing water is reliably directed at the water film cutting protrusion 140 by using the same leg joint 100 and simply preparing a different standpipe receiving port 300.

[0047] <Details of the leg joint 100 and support structure> The structure of the leg joint 100 according to this embodiment and the support structure for the leg joint 100 will be described in more detail below. As shown in Figs. 1 to 3, this leg joint 100 includes a main body 101 (having a standpipe connecting portion 110, a horizontal pipe connecting portion 120, and a bend portion 130), a standpipe connecting member 320, and a connecting member 310 (it may further include a standpipe receptacle 300, or the standpipe connecting member may be integrated as a connecting member 311). The area indicated by the double-arrowed dotted line in Figs. 1 to 3 is the range of the leg joint 100. For this reason, this leg joint 100 is a leg joint sometimes called a long-neck bend, in which the vertical length L(V) is longer than the horizontal length L(H) (L(V)>L(H)). In any of the cases shown in Figs. 1 to 3, the leg joint 1 These multiple components that make up 00 (which may include the main body 101, the standpipe connection member 320, the connection member 310, and the standpipe socket 300, and the standpipe connection member 320 may be the connection member 311 configured as part of the connection member) are joined together at the adhesive joint with adhesive or the like at the manufacturing site, integrated, and then transported to the construction site.

[0048] The leg joint 100 is delivered to the construction site, and the stand pipe connecting member 320 (which may be the stand pipe connecting member portion of the connecting member 311 in which the stand pipe connecting member and the connecting member are integrated as a connecting member) that integrally constitutes the leg joint 100 is connected to the stand pipe 1100 using a rubber ring, and the horizontal main pipe 1200 is connected to the horizontal pipe connecting portion 120 of the main body 101 of the leg joint 100, completing the connection work at two points that constitute the drainage piping structure. Then, support work is performed so that the support member 170 (hanging support member 170D, lifting support member 170U) and / or support member 180 (hanging support member 180D, lower support member 180US) is supported by the floor slab S via the cut bolts B, and / or by the concrete foundation C below the lowest floor slab S.

[0049] As a result of such connection and support work, it is possible to realize a drainage piping structure in which only the connection member 310 is embedded in the floor slab S of the lowest layer, as shown in Figures 17, 18, and 22; a drainage piping structure in which the connection member 310 and the stand pipe connection portion 110 of the main body 101 are embedded in the floor slab S of the lowest layer, as shown in Figures 7 and 19; a drainage piping structure in which the connection member 310 and the stand pipe connection member 320 are embedded in the floor slab S of the lowest layer, as shown in Figures 20 and 21; and a drainage piping structure in which the connection member 310, the stand pipe connection portion 110 of the main body 101, and the stand pipe connection member 320 are embedded in the floor slab S of the lowest layer, as shown in Figures 1(A) and 2. In order to have at least a portion of the connection member 310 embedded in the floor slab S of the lowest layer, the leg joint 100 can be installed close to the underside of the floor slab S.

[0050] The cross-sectional views of FIG. 1(B) and FIGS. 3 to 5 show the inner diameter of the pipe as an example. The leg joint 100 of this embodiment has the above-mentioned features of the upper protrusion 112, the lower protrusion 122, the water film cutting protrusion 140, and the outer layer members (vibration damping material 160, vibration insulator (sound absorbing material 150), sound insulation material 152), and the leg joint 100 shown in other than Figure 5 (D) has a stand pipe receiving port 300 that can offset the stand pipe 1100 connected to the leg joint 100.

[0051] Next, we will explain this standpipe socket 300. Figure 5 shows a standpipe socket 302 used when the standpipe 1102 connected to the leg joint 100 is not eccentric, and Figures 1 to 4 show a standpipe socket 304 used when the standpipe 1104 connected to the leg joint 100 is eccentric. Here, it is assumed that the nominal diameter of the standpipe 1102 is 125A and the nominal diameter of the standpipe 1104 is 100A.

[0052] The standpipe receptacle 302 and the standpipe receptacle 304, which have different structures, are used in the state without eccentricity shown in Fig. 5 and the state with eccentricity shown in Fig. 1 to Fig. 4. These standpipe receptacle 302 and standpipe receptacle 304 both have a substantially hollow cylindrical shape, but the standpipe receptacle 302 shown in Fig. 5(C) does not have the space 304S that the standpipe receptacle 304 shown in Fig. 4(C) has. The stand pipe receiving port 304 has this space 304S, and the pipe core of the stand pipe 1104 is The stand pipe 1104 can be made eccentric by being moved closer to or farther away from the connection part 120 (it is shown close to the connection part 120 in these Figs. 1 to 4). In the state shown in Fig. 4, if the stand pipe receptacle 304 is joined to the stand pipe connection part 110 of the leg joint 100 with the left and right reversed, the pipe core of the stand pipe 1104 can be made eccentric by being moved away from the horizontal pipe connection part 120.

[0053] Next, the upper protrusion 112 and the lower protrusion 122 will be described with reference to Figures 8 and 10. The upper protrusion 112 is attached to the outer circumferential surface of the standpipe connecting portion 110 of the main body 101, At least one location on the outer circumferential surface of the connection member 310 and the outer circumferential surface of the stand pipe connection member 320 is provided with an upper protrusion 112 on at least a portion of the circumferential direction. Here, as shown in Fig. 8, the upper protrusion 112 is provided on the outer circumferential surface of the stand pipe connection part 110 of the main body 101 and the outer circumferential surface of the stand pipe connection member 320, respectively. The upper protrusion 112 provided on the outer peripheral surface of the riser pipe connection portion 110 in the main body 101 shown in Figure 8 and the upper protrusion 112 provided on the outer peripheral surface of the riser pipe connection member 320 (and further the upper protrusion 112 provided on the outer peripheral surface of the connection member 310 not shown) are the same except for the different outer diameter lengths LL of the upper protrusions 112 (here, as an example, LL(1)>LL(3)>LL(2)).Therefore, in the following, when explaining the upper protrusion 112, the upper protrusion 112 provided on the outer peripheral surface of the riser pipe connection portion 110 in the main body 101 will be used as a representative and will be explained with reference to Figures 10, 14 to 16. Furthermore, by making LL(1), LL(2), and LL(3) shown in Figure 8 equal, it is preferable that the same (type of) support member 170 can be used for the support member 170 that is provided in contact with the upper protrusion 112 on the outer peripheral surface of the vertical pipe connection portion 110 in the main body 101 and the support member 170 that is provided in contact with the upper protrusion 112 on the outer peripheral surface of the vertical pipe connection member 320 (and also for the support member 170 that is provided in contact with the upper protrusion 112 on the outer peripheral surface of the connection member 310 (not shown)).

[0054] As shown in the front outline views of the leg joint 100 shown in Figures 8(A) and 10(A) (viewed from the direction of the outline arrow shown in Figure 10(B)) and Figure 8(B), the upper protrusion 112 has a width W and a height H, and also has a length L that protrudes from the outer layer member provided on the leg joint 100. Since an opening (slightly larger than the width W and height H) is provided in the outer layer member at the position of the upper protrusion 112, the upper protrusion 112 is configured to always abut against the band portion 172 of the support member 170, as shown in the enlarged view of Figure 14(A). That is, even if the outer diameter of the leg joint 100 (here, the outer diameter of the standpipe connection portion 110) at the position supported by the support member 170 differs due to (1) whether or not an outer layer member (vibration-damping material 160, vibration insulator (sound-absorbing material 150), sound-proofing material 152, etc.) is attached to the leg joint 100, (2) the type of this outer layer member is different, or (3) the type of standpipe 1100 connected to the leg joint is different, the same (type of) support member 170 can be used because the support member 170 is abutted against the upper protrusion portion 112.

[0055] On the other hand, as shown in the front outline view of the leg joint 100 shown in Figure 10(A), the lower protrusion 122 is formed in a rib shape extending downward from the arc-shaped bend portion 130 that constitutes the main body 101 of the leg joint 100. As shown in Figure 10(A), this lower protrusion 122 has a horizontal surface 122L that is parallel to the slab that forms the floor or ceiling of each story of the building. The leg joint 100 that has this lower protrusion 122 that is linear rather than arc-shaped can be stably supported by a support member 180 such as an angle iron.

[0056] Furthermore, since the upper protrusion 112 provided on the outer surface of the vertical pipe connection portion 110 in the main body portion 101 of the leg joint 100 is provided on at least a portion of its circumference, it may be provided on the entire circumference like the upper protrusion 113 provided on the main body portion 101 (of the vertical pipe connection portion 110) of the leg joint 103 shown in Figure 9 and / or the upper protrusion 113 provided on the vertical pipe connection member 323 of the leg joint 103 shown in Figure 9.

[0057] Next, the water film cutting projection 140 will be described with reference to Figures 11 to 13. Figure 11 shows views from various directions of the water film cutting projection 140 provided on the main body 101 of the leg joint 100. More specifically, in Figure 11, the upper left drawing shows a front view of the water film cutting projection 140, the upper right drawing shows a back view of the water film cutting projection 140, and the lower right drawing shows a bottom view of the water film cutting projection 140.

[0058] This water film cutting protrusion 140 is formed from a single protrusion with a simple, approximately triangular shape when viewed from the front as shown in the front view, and therefore has high strength due to its simple shape, and can efficiently cut the water film due to its approximately triangular shape, creating a space below the water film cutting protrusion 140 through which air can pass. The state of the water film when the water film cutting projection 140 is not present is shown in FIG. 12(A), and the state of the water film when the water film cutting projection 140 is present is shown in FIG. 12(B).

[0059] As shown in Figure 12(A), if the water film cutting protrusion 140 is not present, a water film is formed by the wastewater that falls from the standpipe onto the leg joint, and no air passage exists (an air layer cannot be secured). If an air layer cannot be secured within the leg joint when draining water from the standpipe, the leg joint will be filled with wastewater. If the wastewater is discharged from the leg joint at high speed, negative pressure will likely develop within the standpipe. If the wastewater is discharged from the leg joint at low speed, positive pressure will likely develop within the standpipe. This can result in unexpected negative or positive pressure within the standpipe. If the negative pressure within the standpipe is too high, water accumulated in the drain trap will be sucked into the standpipe, or if the positive pressure within the standpipe is too high, water accumulated in the drain trap will spray out into the room, causing a water seal failure.

[0060] On the other hand, as shown in Figure 12 (B), when a water film cutting protrusion 140 is present, the drainage flow that flows down from the vertical pipe to the leg joint hits the water film cutting protrusion 140, causing the drainage flow to split into two, ensuring an air passage, thereby preventing seal water from breaking. In order to prevent problems such as seal water breakdown, it is necessary to ensure that the drainage flow hits the water film breaking projection 140, and therefore, as shown in Figures 1 to 4, a standpipe receptacle 304 is used to make the pipe core of the standpipe close to the horizontal pipe connecting part 120 (as shown in Figure 13(A)) and eccentric, as shown in Figures 1 to 4. Here, we will explain why, in addition to the effect of ensuring that the flowing water hits the water film breaking projection 140, when the pipe diameter of the standpipe connected to the leg joint 100 becomes small, it is preferable to have the standpipe close to the horizontal pipe connecting part 120 (as shown in Figure 13(A)) rather than being separated (as shown in Figure 13(B)).

[0061] 13(B), if the drain is offset outward, the distance WL until the drain hits the main body 101 (bend portion 130) of the leg joint 100 becomes shorter, and the drain space WS becomes narrower. If this drain space WS is narrow, the air passage in the standpipe is easily blocked, which can easily lead to the generation of excessive positive pressure. On the other hand, as shown in Figure 13(A), when the center is offset inward, the distance WL until the drainage water hits the main body 101 (bend portion 130) of the leg joint 100 becomes longer, and the drainage space WS becomes wider. If this drainage space WS is wider, the air passage in the standpipe is less likely to be blocked, and excessive positive pressure is less likely to be generated.

[0062] Next, referring to FIG. 14 (partially FIG. 10), the relationship between the upper protrusion 112 and the band portion 172 of the support member 170 when an outer layer member (vibration damping material 160, vibration insulator (sound absorbing material 150), sound insulation material 152) is provided on the leg joint 100 will be described. As shown in FIG. 10(A), the upper protrusion 112 has a width W and a height H, and has a protruding length L that protrudes more than the outer layer member (only the sound absorbing material 150 in the enlarged view of FIG. 14(A)) provided on the leg joint 100. Since the position of the upper protrusion 112 in the sound absorbing material 150, which is the outer layer member, has an opening (slightly larger than the width W and height H), as shown in the enlarged view of FIG. 14(A), the upper protrusion 112 always abuts against the band portion 172 of the support member 170. For this reason, the same (type of) support member 170 can be used regardless of the presence or absence of the outer layer member attached to the leg joint 100, the type of the outer layer member, and the type of the riser pipe or the manifold pipe connected to the riser connection portion 110.

[0063] Next, referring to FIG. 15, the state in which the support member 170 is attached to the leg joint 100 will be described. As shown in the enlarged view of FIG. 14(A) described above, when the leg joint 100 includes an outer layer member (here, the sound absorbing material 150), the upper protrusion 112 protrudes from the opening of the outer layer member and its tip protrudes and is exposed more than the outer layer member. In this state, the band portion 172 (for example, a combination of semi-annular bands) of the support member 170 abuts against the tip of the upper protrusion 112, and the support member 170 is attached to the riser connection portion 110 of the main body portion 101 of the leg joint 100 by a fastening member 174 (for example, a member that integrates a combination of semi-annular bands by screwing with bolts and nuts) of the support member 170. In this case, it is preferable that the support member 170 can use the same (type of) member regardless of the presence or absence of the outer layer member attached to the leg joint 100, the type of the outer layer member, and the type of the riser pipe or the manifold pipe connected to the riser connection portion 110. Note that the support member 170 has a circular split bolt hole portion through which the split bolt B is inserted in a state where a combination of semi-annular bands is integrated.

[0064] Next, with reference to Fig. 16, a state in which the support member 180 is attached to (in contact with) the leg joint 100 will be described. As shown in Fig. 16, in this leg joint 100, the vibration-damping material 160 is present at the curved surface of the bend portion 130 (the position where the wastewater flow that has flowed down the standpipe hits), and the vibration-damping material 160 as an outer layer member for achieving vibration damping is not present at the position of the lower protrusion 122 where the support member 180 is attached, but rather there is a sound-absorbing material 150 or a sound-insulating material 152 in addition to the sound-absorbing material 150 as an outer layer member for achieving sound insulation (in the enlarged view of Fig. 16, the sound-insulating material 152 in addition to the sound-absorbing material 150). The lower protrusion 122 has a horizontal surface 122L, and therefore, as shown in Fig. 16, a horizontal surface 180L of a support member 180 such as an angle bar can be abutted against this horizontal surface 122L to provide stable support. Furthermore, this support member 180 stably supports the bend portion of the main body 101 of the leg joint 100, and is supported by the support structure described below, either by being suspended from the lowest floor slab S (as a hanging support member 180D) or by being supported from a concrete foundation C below the lowest floor slab S (as a lower support member 180US).

[0065] Next, the support structure of the leg joint 100 will be described with reference to Fig. 7 and Fig. 17 to Fig. 21. Fig. 7 shows a state in which the leg joint 100, which does not have the upper protrusion 112, the lower protrusion 122, and the outer layer member, is lifted and supported from the floor slab S by the lifting support member 170U at the position of the stand pipe connecting member 320, Fig. 17 shows a state in which the leg joint 100 is lifted and supported by the lifting support member 170U using the upper protrusion 112 of the stand pipe connecting member 320, and is suspended and supported by the hanging support member 170D using the upper protrusion 112 of the main body 101, Fig. 18 shows a case in which the leg joint 100 in Fig. 17 is equipped with the outer layer member shown in cross section, and Fig. 19 shows a state in which the leg joint 100 is lifted and supported by the lifting support member 170U using the upper protrusion 112 of the stand pipe connecting member 320, Figure 20 shows the leg joint 100 being supported by hanging support member 170D using the upper protrusion 112 of the main body 101, and also being supported by hanging support member 170D using the lower protrusion 122 of the main body 101; Figure 21 shows the leg joint 100 being supported by hanging support member 170D using the upper protrusion 112 of the main body 101, and also being supported downward from a concrete foundation C or the like below the lowest floor slab S by downward support member 180US using the lower protrusion 122 of the main body 101.

[0066] The lifting support from the floor slab S by the lifting support member 170U is performed by inserting a cut bolt B into the cut bolt hole portion of the support member 170, which is attached so that the inner surface of the band portion 172 abuts against the upper protrusion portion 112 of the vertical pipe connection member 320 of the leg joint 100, and screwing it in with a nut N, thereby lifting and supporting from the floor slab S. The suspension support from the floor slab S by the suspension support member 170D is A cut bolt B (shorter than the cut bolt B for suspension support by the suspension support member 180D) is inserted into the cut bolt hole of the support member 170, which is attached so that the inner surface of the band portion 172 abuts against the upper protrusion portion 112 of the vertical pipe connection portion 110 of the main body portion 101, and is screwed in with a nut N, so that the support is suspended from the floor slab S.

[0067] The hanging support from the floor slab S by the hanging support member 180D is achieved by abutting the horizontal surface 180L of a support member 180 such as an angle bar against the horizontal surface 122L of the lower protrusion 122 of the horizontal pipe connection part 120 of the main body 101 of the leg joint 100, and a cut bolt B is inserted into a bolt hole provided in the horizontal surface 122L and screwed in with a nut N, thereby hanging and supporting from the floor slab S. The lower support member 180US lifts and supports the lowest floor slab S from the concrete foundation C or the like below by abutting the horizontal surface 180L of the support member 180 such as an angle iron against the horizontal surface 122L of the lower protrusion 122 of the horizontal pipe connection part 120 of the main body 101 of the leg joint 100, and the end of the vertical surface abuts against the concrete foundation C or the like, thereby lifting and supporting from the concrete foundation C or the like.

[0068] Here, it is preferable that the support member 170 provided in contact with the upper protrusion 112 and / or the support member 180 provided in contact with the lower protrusion 122 include vibration-proof rubber or the like having vibration-proof properties. Furthermore, as shown in Figures 17, 18, 20 and 21, when the vertical pipe connection portion 110 of the main body 101 of the leg joint 100 is not embedded in the floor slab S, it is preferable in that it can be quickly changed from lifting support from the floor slab S by a lifting support member 170U above the slab S to hanging support from the floor slab S by a hanging support member 170D below the slab S.

[0069] As described above, the leg joint 100 of this embodiment and the drainage piping structure in which the leg joint 100 is installed on the floor slab S of a building can be constructed with a small number of parts and in a shorter construction time at the construction site. 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]

[0070] The present invention is preferable for a leg joint that is installed to penetrate the floor slab S of a building, and is particularly preferable in that it requires a small number of parts and can shorten the construction time at the construction site. [Explanation of symbols]

[0071] 100 Leg joint 101 Main body 110 Standpipe connection 112 Upper protrusion 120 Horizontal pipe connection 122 Lower protrusion 130 Bend section 140 Water film cutting protrusion 150 Sound absorbing material (vibration insulator) 152 Soundproofing material 160 Damping material 170D Hanging support member 170U lifting support member 180D Hanging support member 180US Lower support member 300 Standpipe Socket 310 Connecting member 320 Stack pipe connection member 1100 Standpipe 1200 Horizontal main pipe

Claims

1. In drainage equipment for a building having multiple floors, a resin leg joint for the lowest floor connects the downstream end of a standpipe that is piped through each floor to the upstream end of a horizontal main pipe that is piped horizontally under the floor slab of the lowest floor, the standpipe side being longer than the horizontal main pipe side, the leg joint being made of multiple members that are integrated with adhesive joints, The leg joint is a main body including a standpipe connection portion to which a substantially cylindrical connection member having a standpipe connection member at its upper end that is connected to the standpipe above the upper surface of the floor slab, a horizontal pipe connection portion that is connected to the horizontal main pipe, and a curved pipe-shaped bend portion that changes direction so that the pipe axis direction of the standpipe connection portion and the pipe axis direction of the horizontal pipe connection portion are perpendicular to each other, and connects the standpipe connection portion and the horizontal pipe connection portion; The standpipe connecting member; the connecting member, A leg joint characterized in that the connecting member has a portion that is embedded in the lowest floor slab.

2. 2. The leg joint according to claim 1, wherein at least one of the riser pipe connection portion and the riser pipe connection member has a portion that is embedded in the lowest floor slab in addition to the connection member.

3. A leg joint as described in claim 1, characterized in that when the thickness of the floor slab is 100 mm or more, the distance between the upper end surface of the vertical pipe connecting member and the lower surface of the floor slab is 150 mm or more.

4. 2. The leg joint according to claim 1, wherein the vertical pipe connection portion and the connecting member are connected below the upper surface of the floor slab via a substantially annular vertical pipe receiving port.

5. 5. The leg joint according to claim 4, wherein the standpipe socket has a protrusion at a lower end on the inner periphery of the substantially annular shape.

6. 5. The leg joint according to claim 4, wherein the standpipe receiving port causes the pipe core of the standpipe to be eccentric by moving the pipe core closer to or farther away from the horizontal pipe connecting portion.

7. 2. The leg joint according to claim 1, wherein the member located above the standpipe connection portion is made of a transparent resin.

8. 2. The leg joint according to claim 1, wherein the standpipe connecting member and the connecting member are integrally formed as a connecting member, or are formed as separate members.

9. A leg joint as described in claim 1, characterized in that at least one of the outer surfaces of the vertical pipe connection part of the main body, the outer surface of the connection member and the outer surface of the vertical pipe connection member is provided with an upper protrusion portion in at least a portion of its circumferential direction that a hanging support member that supports the leg joint by suspending it from the underside of the floor slab, or a lifting support member that lifts and supports the leg joint from the upper surface of the floor slab, comes into contact with.

10. A hanging support member that hangs and supports the leg joint from the underside of the floor slab, or a lower support member that lifts and supports the leg joint from below, is provided in contact with the outer peripheral surface of the horizontal pipe connection portion of the main body, at least in a part of the lower half in the circumferential direction.

2. A leg joint according to claim 1, characterized in that it comprises a protruding portion.

11. A drainage piping structure characterized in that the leg joint described in any one of claims 1 to 10 is installed under the floor slab of the lowest level, and piping is connected only in the vertical direction above the floor slab of the lowest level.

12. A drainage piping structure in which the leg joint described in claim 9 is installed, characterized in that the hanging support member is arranged in abutment against the upper protrusion portion so that the leg joint is suspended and supported from the underside of the floor slab, or the lifting support member is arranged in abutment against the upper protrusion portion so that the leg joint is lifted and supported from the upper surface of the floor slab.

13. A drainage piping structure as described in claim 12, characterized in that the same hanging support member and the same lifting support member are used regardless of whether or not an outer layer member is attached to the leg joint, the type of the outer layer member, and the type of vertical pipe connected to the leg joint.

14. A drainage piping structure in which the leg joint described in claim 10 is installed, characterized in that the hanging support member is arranged in abutment against the lower protrusion portion so that the leg joint is suspended and supported from the underside of the floor slab, or the lower support member is arranged in abutment against the lower protrusion portion so that the leg joint is lifted from below and supported.

Images