JP5389431B2 - Drainage equipment - Google Patents

Description

  In the present invention, a lower connection portion of a drainage pipe joint installed through a concrete slab on an upper floor of an apartment house is inserted and connected to an upper receptacle of a drainage stack on a lower floor, and the lower end of the drainage stack is inserted. The present invention relates to a drainage facility having a structure in which a mouth is inserted and connected to an upper receiving port of a drainage pipe joint installed through a concrete slab on a lower floor.

A technique relating to the above-described drainage facility is described in Patent Document 1.
As shown in FIGS. 18 and 19, the drainage facility 100 includes drainage pipe joints 110 that are installed on each floor through a concrete slab CS that partitions an upper floor and a lower floor of an apartment house. The drainage pipe joint 110 is a joint that joins the drainage led by the drainage stack 102 on the upper floor and the drainage branch pipe 103 and flows into the drainage stack 102 on the lower floor, and the trunk portion 111 thereof is a concrete slab CS. It is fixed by backfill mortar Mr or the like while being passed through the through-hole CH.
The drainage stack 102 is provided with an upper receptacle 102u, and the lower end straight pipe portion 115 of the drainage pipe joint 110 on the upper floor is inserted and connected to the upper receptacle 102u. Further, the lower end insertion port of the drainage stack 102 is inserted and connected to the upper receiving port 112 of the drainage pipe joint 110 on the lower floor.
The drainage facility 100 is piped by assembling a drainage pipe joint 110 and a drainage stack 102 in order from the lower floor. That is, after the drainage pipe joint 110 on the lower floor is installed, the lower end insertion port of the drainage stack 102 on the floor is inserted and connected to the upper receiving port 112 of the drainage pipe joint 110. Next, in a state where the drainage stack 102 is supported by the support material, the upper floor drainage pipe joint 110 is passed through the through hole CH of the upper floor concrete slab CS, and the lower end straight pipe portion 115 of the drainage pipe joint 110. Is inserted and connected to the upper receiving port 102u of the drainage stack 102. Furthermore, the lower end insertion port of the upper floor drainage stack 102 is inserted and connected to the upper receiving port 112 of the upper floor drainage pipe joint 110. In this way, the drainage facility 100 is constructed by connecting the drainage pipe joint 110 and the drainage stack 102 in order from the lower floor.

JP 2006-22581 A

In the drainage system 100 described above, since the drainage pipe joints 110 on the upper floor and the lower floor are both fixed to the concrete slab CS, for example, the drainage pipe 102 on the way is clogged or damaged, and the drainage stand at that portion When removing the pipe 102, as shown in FIG. 19, the drainage stack 102 must be cut and pulled up and down. Further, when a new drainage stack 102 is attached, it is necessary to attach an exchange joint capable of adjusting the length to the new drainage stack 102 at the intermediate portion. That is, a part of the drainage stack 102 is accommodated in the exchange joint, and the drainage stack 102 is set between the upper and lower drainage pipe joints 110 in a short state, and then the drainage It is necessary to draw a part of the vertical pipe 102 from the exchange joint and connect it to the drainage pipe joints 110 on the upper floor and the lower floor. For this reason, the drainage facility 100 takes time to update the drainage stack 102.
Further, the drainage facility 100 hardly considers that the drainage stack 102 is generally inclined with respect to the drainage pipe joints 110 on the upper floor and the lower floor. For this reason, when the upper and lower drainage pipe joints 110 are displaced relative to each other in the horizontal direction due to an interlayer displacement due to an earthquake, an unreasonable force is applied to the connection point between the drainage stack 102 and the drainage pipe joint 110, and the drainage equipment 100 May be damaged.

  The present invention has been made to solve the above problems, and the technical problem of the present invention is to facilitate the renewal of the drainage stack and to ensure the seismic performance of the drainage equipment. is there.

The above-described problems are solved by the inventions of the claims.
According to the first aspect of the present invention, the lower connection portion of the drainage pipe joint installed through the concrete slab on the upper floor of the apartment building is inserted and connected to the upper receptacle of the drainage stack on the lower floor. Is a drainage facility having a structure in which a lower end insertion port is inserted and connected to an upper receiving port of a drainage pipe joint installed through a concrete slab on a lower floor, wherein the drainage pipe joint includes the upper body. And a lower body having the lower connecting portion, and a connection mechanism configured to connect the upper body and the lower body in a watertight manner and to be disengaged from each other. The upper body and the lower body are disconnected, and the drainage stack is then connected to the upper receptacle of the drainage stack and the lower connection part of the drainage pipe joint on the upper floor. Move upward with the fuselage and tilt further The drainage standpipe can be removed, and the drainage standpipe can be attached by reverse operation. The upper receiving port of the drainage stack and the upper receiving port of the drainage pipe joint are interlayer displacement due to an earthquake. When the upper and lower drainage pipe joints are displaced relative to each other in the horizontal direction, the drainage stack is not disturbed and the watertightness can be maintained. .

According to the present invention, the connection between the upper body and the lower body of the drainage pipe joint on the lower floor is released, and then the connection between the upper receptacle of the drainage stack and the lower connection part of the drainage pipe joint on the upper floor is maintained. The drainage stack can be removed by moving the drainage stack together with the upper body and tilting it. Further, the drainage stack can be attached by the reverse operation. That is, the drainage stack can be updated by so-called exchange. For this reason, it becomes unnecessary to cut the old drainage stack, and the removal of the old drainage stack becomes easy. In addition, an exchange joint or the like for adjusting the pipe length is not required at the intermediate portion of the drainage standpipe as in the prior art, so that costs can be reduced and a new drainage standpipe can be easily restored.
In addition, the upper receiving port of the drainage stack and the upper receiving port of the drainage pipe joint obstruct the inclination of the drainage stack when the upper and lower floor drainage pipe joints are displaced in the horizontal direction due to the interlayer displacement due to the earthquake. It is configured so that water tightness can be maintained. For this reason, the seismic performance of the drainage facility can be secured.

According to the invention of claim 2 , a seal groove is formed on the inner peripheral surface of the upper receptacle of the drainage stack so as to extend in the circumferential direction, and an annular seal material is fitted into the seal groove, The inner peripheral surface of the upper receiving port located above the annular sealing material is a tapered surface that expands upward, and the inner peripheral surface of the upper receiving port located below the sealing material expands downward. It is characterized by the fact that it has a tapered surface.
For this reason, the drainage stack can be inclined by the angle of the upper and lower tapered surfaces with the sealing material as a fulcrum with respect to the lower connection portion of the drainage pipe joint on the upper floor. Therefore, if the angle of the taper surface is set to be equal to or larger than the inclination angle necessary for renewing the drainage stack, even if an earthquake occurs, the inclination of the drainage stack is not hindered, and water tightness is maintained.

According to the invention of claim 3, the upper receiving port of the drainage pipe joint includes a receiving port main body portion that stores the substantially cylindrical sealing material, and an inner flange portion that holds the substantially cylindrical sealing material above the receiving port main body portion. And the inner peripheral surface of the inner flange portion is a tapered surface that expands upward.
For this reason, the drainage stack is inclined by the angle of the taper surface with respect to the upper receiving port of the drainage pipe joint on the lower floor by the action of the tapered surface of the inner flange portion and the substantially cylindrical sealing material of the receiving port body portion. Is possible.

According to the invention of claim 4, the gap dimension between the outer peripheral surface of the lower connecting portion of the drainage pipe joint inserted into the upper receptacle of the drainage stack and the inner peripheral surface of the upper receptacle of the drainage stack is from 2 mm. It is set between 12mm.
According to the invention of claim 5, the upper receiving port of the drainage stack is engaged with the engaging portion formed on the outer peripheral surface of the lower connecting portion of the drainage pipe joint from the axial direction, and the lower connecting portion with respect to the upper receiving port. It is characterized in that a cylindrical regulating jig that keeps the insertion depth dimension of can be mounted coaxially.
In this way, since the insertion depth dimension of the lower connection portion of the drainage pipe joint with respect to the upper receptacle of the drainage stack can be kept constant by the regulating jig, the drainage standage can be maintained during an earthquake by setting the insertion depth dimension to a specified value. Even when the tube is inclined, sealing performance can be ensured.

According to the sixth aspect of the present invention, a support that can support the drainage pipe joint is attached to the outer peripheral surface of the upper receiving port of the drainage pipe joint, and the support slab is attached to the concrete slab via a height adjustment mechanism. It is fixed to the upper surface of this.
For this reason, when inserting the lower connection part of a drainage pipe joint with respect to the upper receptacle of a drainage stack, the height adjustment of a drainage pipe joint can be performed with a height adjustment mechanism. Thereby, after the connection between the lower connection portion of the drainage pipe joint and the upper receptacle of the drainage stack on the lower floor is completed, the regulation jig can be removed.

According to the invention of claim 7, the drainage stack is constituted by a socket having an upper receiving port and a straight pipe connected to the socket.
For this reason, when the drainage stack is updated, it is possible to update only the straight pipe and reuse the socket.
According to the invention of claim 8, the drainage stack is characterized in that the upper receiving port and the straight pipe are integrally formed.
According to the invention of claim 9, the upper end portion of the upper receptacle of the drainage stack is inserted into the lower end connection port of the upper ring portion, so that the upper end ring portion is fixed to the upper receptacle, and the upper end A seal groove for holding the annular sealing material is formed coaxially with the upper receiving port on the upper inner peripheral surface of the ring portion.
According to the invention of claim 10, the upper end portion of the upper receptacle of the drainage stack is provided with an upper end ring portion in which a seal groove for holding the annular sealing material is formed on the inner peripheral surface. And the upper ring portion are integrally formed.

  According to the present invention, the drainage stack can be easily renewed, and the seismic performance of the drainage facility can be secured.

[Embodiment 1]
Hereinafter, the drainage equipment according to Embodiment 1 of the present invention will be described with reference to FIGS. The drainage facility according to the present embodiment is a drainage facility in an apartment house such as an apartment. Here, FIG. 1 is an overall side view of the drainage facility according to the present embodiment, and FIG. 2 is a longitudinal sectional view of a receptacle socket of a drainage stack, a longitudinal sectional view of an upper receptacle of a drainage pipe joint, and the like. 3 and 4 are longitudinal sectional views of the regulating jig, FIG. 5 is a perspective view of a support tool for supporting a drainage pipe joint, and FIGS. 6 to 8 are side views showing construction and renewal procedures of drainage equipment. 9 to 17 are longitudinal sectional views showing modified examples of the upper receptacle of the drainage pipe joint.

<About drain pipe joint 20>
As shown in FIG. 1, the drainage facility 10 according to the present embodiment includes a drainage pipe joint 20 that is installed on each floor through a concrete slab CS that partitions an upper floor and a lower floor of an apartment house. The drainage pipe joint 20 is a cast iron joint that joins the drainage led by the drainage stack 30 on the upper floor and the drainage side branch pipe (not shown) and flows into the drainage stack 30 on the lower floor. The body portion 21 of the pipe joint 20 is supported by the support frame 50 in a state where the body portion 21 is passed through the through hole CH of the concrete slab CS. Here, the through hole CH of the concrete slab CS is filled with the rock wool W after the trunk portion 21 of the drain pipe joint 20 is passed, and the mortar Mr is laminated on the rock wool W. Thus, since the rock wool W is filled in the through hole CH, the drainage sound is difficult to propagate to the concrete slab CS.
The body portion 21 of the drainage pipe joint 20 is of a vertically divided type, and includes an upper body 21a and a lower body 21b. And the lower flange 41 formed in the lower part of the upper body 21a and the upper flange 42 formed in the upper part of the lower body 21b are coaxially connected through a packing (not shown) in a watertight state. That is, the lower flange 41 of the upper body 21a, the upper flange 42 of the lower body 21b, packing, bolts, nuts (not shown), and the like correspond to the connecting mechanism of the present invention.

An upper receiving port 22 into which a lower end insertion port 31 s (lower end portion) of the straight pipe 31 of the drainage stack 30 is inserted and connected is formed on the upper body 21 a of the drain pipe joint 20. As shown in FIG. 2C, the upper receiving port 22 is formed in a cylindrical shape and has a receiving port main body portion 26 having a ring-shaped step 26e at the bottom, and is formed in a cylindrical shape and stored in the receiving port main body portion 26. It is composed of a rubber seal material 27 and an inner flange portion 22 f that holds the upper end surface of the seal material 27. A receiving ring portion 27r with which the end surface of the lower end insertion port 31s of the drainage stack 30 abuts is provided at the bottom of the sealing material 27. Thereby, the lower end insertion port 31 s of the drainage stack 30 can be inserted into the upper receiving port 22 of the drainage pipe joint 20 until the end surface thereof abuts on the receiving ring part 27 r of the sealing material 27. Here, the insertable dimension of the lower end insertion opening 31 s in the upper receiving opening 22, that is, the penetration depth dimension D is set to about 65 mm.
Further, the inner peripheral surface of the inner flange portion 22f of the upper receiving port 22 is a tapered surface 22t that expands upward as shown in FIG. The inclination angle of the tapered surface 22t with respect to the axis of the upper receiving port 22 is set to about 6 °.
Here, in a state where the lower end insertion port 22 of the drainage stack 30 is inserted into the upper receiving port 22, the drainage stack 30 can be tilted by about 6 ° to a state along the tapered surface 22t of the upper receiving port 22, that is, In the process in which the drainage stack 30 is inclined to the state along the tapered surface 22t, the tip of the drainage stack 30 (the tip of the lower end insertion port 31s) does not come into contact with the inner peripheral surface of the receptacle body 26. The inner diameter dimension of the receptacle body 26 is set. The reason why the drainage stack 30 can be tilted by about 6 ° with respect to the upper receiving port 22 of the drainage pipe joint 20 as described above is to secure a tilt angle (about 5 °) required when the drainage stack 30 is updated. It is. Therefore, the angle at which the drainage stack 30 is inclined due to the interlayer displacement due to the earthquake is automatically secured.

As shown in FIG. 1, on the upper side surface of the lower body 21 b of the drainage pipe joint 20, there is a drainage side branch pipe (not shown) from a sanitary appliance (kitchen sink, toilet, etc.) on each floor below the upper flange 42. A plurality of side branch pipe receptacles 25 to be connected are formed. A rubber seal material (not shown) is also attached to the horizontal branch pipe receptacle 25.
Further, a lower connection portion 23 that is inserted and connected to the receiving socket 35 of the drainage stack 30 is formed at a lower end portion of the lower body 21b, that is, a portion protruding downward from the through hole CH of the concrete slab CS. The lower connecting portion 23 is formed in a straight tube shape, and a hook-like locking portion 24 is formed on the outer peripheral surface thereof. Here, as shown in FIG. 2A, the dimension T from the lower end surface 24d of the locking portion 24 to the tip (lower end) of the lower connection portion 23 is set to about 130 mm. Moreover, the position of the latching | locking part 24 is generally provided in the position which protrudes about 30 mm below from the through-hole CH of concrete slab CS.

<About the drainage stack 30>
As shown in FIG. 1, the drainage stack 30 is composed of a socket socket 35 made of cast iron and a straight pipe 31 made of hard polyvinyl chloride lining steel pipe.
The receptacle socket 35 is a socket that constitutes the upper receptacle of the drainage stack 30, and as shown in FIG. 2 (A), it is formed in a barrel shape in which the central portion in the height direction (axial direction) has the largest diameter. ing. The receptacle socket 35 includes an upper end ring portion 34, a downwardly widened portion 36, a large diameter cylindrical portion 37, an upwardly widened portion 38, and a lower connection mechanism 39 in order from the top.
The upper end ring portion 34 has an outer diameter dimension substantially equal to that of the large-diameter cylindrical portion 37. As shown in FIGS. 2A and 2B, a sealing groove 34m having a square cross section is provided on the inner peripheral side in the circumferential direction. It is formed to extend. A rubber annular sealing material 33 having a circular cross section is fitted into the sealing groove 34m. Further, as shown in FIG. 2B, the inner peripheral surface of the upper end ring portion 34 is an upward tapered surface 34u in which the upper side of the annular seal member 33 (seal groove 34m) expands upward, and the annular seal The lower side of the material 33 is a downward tapered surface 34d that expands downward. Here, the inclination angle of the upward tapered surface 34u and the downward tapered surface 34d with respect to the axis of the socket socket 35 is set to about 6 °.

The downward expanded portion 36 located below the upper end ring portion 34 has an outer diameter that is substantially equal to that of the large-diameter cylindrical portion 37. As shown in FIG. 5, an engagement groove 36m is formed in which a set screw 61 of a regulation jig 60 (described later) is applied. The engagement grooves 36m are formed in a ring shape so as to extend in the circumferential direction, and three engagement grooves 36m are formed at regular intervals (10 mm intervals) in the axial direction. Further, the wall thickness dimension of the downward expanding portion 36 decreases at a constant ratio as it approaches the lower large-diameter cylinder portion 37, and is substantially equal to the wall thickness dimension of the large-diameter cylinder portion 37 in the vicinity of the large-diameter cylinder portion 37. Become. Thereby, the inner peripheral surface of the downward expanding portion 36 becomes a tapered surface 36t that expands downward. The inclination angle of the tapered surface 36t with respect to the axis of the socket socket 35 is set to about 6 °. Further, as shown in FIG. 2B, a ring-shaped step 36d is formed between the tapered surface 36t of the downward expanding portion 36 and the downward tapered surface 34d of the upper end ring portion 34, and the upper end ring portion. The downward taper surface 34d of 34 protrudes radially inward from the taper surface 36t of the downward expanding portion 36. Thereby, even if the drainage stack 30 is inclined and the lower connection portion 23 of the drainage pipe joint 20 is in a state substantially parallel to the downward tapered surface 34d of the upper end ring portion 34 of the receiving socket 35, the lower connection portion 23 is provided. Does not interfere with the tapered surface 36t of the downward expanding portion 36.
The large-diameter cylindrical portion 37 located on the lower side of the downward expanding portion 36 is formed in a cylindrical shape. An upwardly widened portion 38 located below the large-diameter cylindrical portion 37 is formed with a wall thickness equal to that of the large-diameter cylindrical portion 37. The inner peripheral surface 38e of the upward expanding portion 38 is expanded upward at an inclination angle of about 15 ° with respect to the axial center.

The lower connection mechanism 39 located on the lower side of the upward expansion portion 38 is a mechanism for connecting the receiving socket 35 to the end of the straight pipe 31, and includes a receiving flange 39f including the straight pipe receiving opening 39u, a ring shape, and the like. The presser flange portion 39p, the seal ring 39x, and the bolt and nut 39z for connecting the flange portions 39f and 39p. The seal ring 39x is configured to be sandwiched between the pressing surfaces of both flanges 39f and 39p, and can be deformed radially inward when the bolts & nuts 39z are tightened and the flanges 39f and 39p approach each other. Has been. For this reason, as shown in FIG. 2 (A), the bolts and nuts are inserted in the state where the upper end insertion port 31z of the straight pipe 31 is inserted into the straight pipe receiving port 39u of the receiving flange part 39f through the holding flange part 39p and the seal ring 39x. By tightening 39z, the socket socket 35 and the straight pipe 31 can be connected in a watertight state by the action of the seal ring 39x.
As shown in FIG. 2A, the receptacle socket 35 is configured so that the lower connection portion 23 of the drainage pipe joint 20 can be inserted to the center position in the axial direction of the upward expansion portion 38. Here, if the maximum dimension that can be inserted into the receptacle socket 35, that is, the maximum insertable dimension of the receptacle socket 35 is Nmax, Nmax = about 130 mm. Further, if the minimum dimension necessary for connection between the lower connection portion 23 of the drainage pipe joint 20 and the socket socket 35 in consideration of an earthquake, that is, the minimum penetration depth dimension of the socket socket 35 is Nmin, Nmin = It is set to 50mm. Normally, a value that allows a margin of about 20 mm with respect to the required minimum penetration depth dimension Nmin is set as the standard penetration depth dimension Nst (Nst = 70 mm) of the socket socket 35.
As described above, the drainage stack 30 is provided on the upper floor drainage pipe joint 20 by the action of the upward taper surface 34u, the downward taper surface 34d, and the taper surface 36t of the downward expansion portion 36 of the upper end ring portion 34 of the socket socket 35. The lower connecting portion 23 is configured to be tiltable by about 6 °. Thereby, even when the drainage stack 30 is inclined due to an interlayer displacement due to an earthquake (less than about 1 °), an excessive force is not applied between the lower connection portion 23 of the drainage pipe joint 20 on the upper floor and the socket socket 35, Watertightness is not impaired. Furthermore, when the drainage stack 30 is updated (described later), the drainage stack 30 needs to be inclined by about 5 ° with respect to the lower connection portion 23 of the drainage pipe joint 20 on the upper floor. It is possible.

<Regulation jig 60>
The restriction jig 60 has an insertion depth dimension of the lower connection portion 23 of the drainage pipe joint 20 with respect to the receiving socket 35 between 70 mm (standard penetration depth dimension Nst) and 50 mm (required minimum penetration depth dimension Nmin). It is a jig that can be adjusted every 10mm.
The restriction jig 60 is configured to be coaxially mounted on the distal end portion (upper end portion) of the receptacle socket 35, and as shown in FIGS. 4A and 4B, a pair of semi-cylindrical jig pieces 60s are combined. It is configured in a cylindrical shape. The jig piece 60 s has a large-diameter lower half-cylinder part 65 and a small-diameter upper half-cylinder part 67 that are coaxially formed, and a semicircular arc-shaped step part 66 at the boundary between the half-cylinder parts 65 and 67. Is formed. Furthermore, a semicircular arc-shaped flange portion 68 is formed at the upper end of the upper half cylinder portion 67 so as to project outward in the radial direction. Here, the dimension K from the upper surface of the flange portion 68 to the lower surface of the step portion 66 is set to about 60 mm.
As shown in FIG. 4B, the pair of jig pieces 60 s are connected so that one end in the circumferential direction can be relatively rotated by a hinge 63. For this reason, by the function of the hinge 63, the pair of semi-cylindrical jig pieces 60s can be switched to the opened state and the opened state. In addition, the pair of jig pieces 60s has both the jig pieces 60s aligned with the other end side in the circumferential direction (opposite the hinge 63), that is, a male screw 69a for holding the regulating jig 60 in a cylindrical shape. And a receiving portion 69b having a female screw hole into which the male screw 69a is screwed.

Here, the inner diameter dimension of the lower half cylinder portion 65 of the restriction jig 60 held in a cylindrical shape is set to a value substantially equal to the outer diameter dimension of the upper end ring portion 34 and the downwardly widened portion 36 of the socket socket 35. Yes. Further, the inner diameter dimension of the upper half cylinder portion 67 of the restriction jig 60 held in a cylindrical shape is set to a value substantially equal to the outer diameter dimension of the lower connection portion 23 of the drainage pipe joint 20.
In addition, the lower half cylinder portion 65 of the restriction jig 60 is provided with a plurality of set screws 61 in the circumferential direction that can be engaged with the engagement grooves 36 m formed on the outer peripheral surface of the receiving socket 35. Here, as shown in FIG. 2A, the height of the set screw 61 is such that the set screw 61 is placed in the socket socket in a state where the stepped portion 66 of the regulating jig 60 is overlapped with the upper end surface of the socket socket 35. 35 is provided at a position where it can be engaged with the lowermost engaging groove 36m.
As shown in FIG. 2A, in the state where the restriction jig 60 is attached to the receiving socket 35, the engaging portion 24 of the lower connection portion 23 of the drainage pipe joint 20 contacts the flange portion 68 of the restriction jig 60. Until it is inserted into the socket 35. As described above, the dimension T from the locking part 24 to the lower end surface of the lower connection part 23 of the drainage pipe joint 20 is about 130 mm, and the dimension from the upper surface of the flange part 68 of the regulating jig 60 to the lower surface of the step part 66. K is about 60 mm. For this reason, the insertion dimension of the lower connection part 23 of the drain pipe joint 20 with respect to the receptacle socket 35 is a dimension T-dimension K = 130 mm-60 mm = 70 mm.
Here, as shown in FIG. 3, when the set screw 61 of the regulating jig 60 is fitted into the uppermost engaging groove 36m located 20 mm above the lowermost engaging groove 36m, the regulating jig 60 The flange portion 68 is increased by 20 mm, and the insertion dimension of the lower connection portion 23 of the drain pipe joint 20 to the receiving socket 35 is dimension T− (dimension K + 20 mm) = 130 mm−80 mm = 50 mm. Further, when the set screw 61 of the regulating jig 60 is fitted in the center engaging groove 36m, the insertion dimension of the lower connection portion 23 of the drainage pipe joint 20 with respect to the socket socket 35 is dimension T− (dimension K + 10 mm) = 130 mm−. 70mm = 60mm. Therefore, the insertion dimension of the lower connection portion 23 of the drainage pipe joint 20 can be adjusted by the regulation jig 60 according to the length dimension of the drainage stack 30. For example, when the straight pipe 31 is cut slightly short and the length of the drainage stack 30 is slightly reduced, cutting is performed by reducing the insertion dimension of the lower connection portion 23 of the drainage pipe joint 20 by the restriction jig 60. The error can be absorbed.
As shown in FIG. 4A, a curing lid 62 for closing the opening of the restriction jig 60 is attached to the flange portion 68 of the restriction jig 60 in a removable state.
Here, the regulation jig 60 is preferably formed of an aluminum alloy.

<About support stand 50>
As shown in FIG. 1, the drainage pipe joint 20 is passed through the through hole CH of the concrete slab CS on the upper floor and further connected to the socket socket 35 of the drainage stack 30 on the lower floor. The part is supported by the support frame 50.
As shown in FIG. 5, the support base 50 adjusts the height of the support 52 attached to the outer periphery of the upper receiving port 22 of the drain pipe joint 20 and the support 52, and the support 52 is attached to the concrete slab CS. It is comprised from a pair of height adjustment mechanism 54 fixed to an upper surface. The support tool 52 is composed of a pair of support tool pieces 52s, and these support tool pieces 52s can be connected and disconnected by bolts 59b and nuts 59n. The support piece 52s includes a central semicircular portion 52e and arm portions 52a on the left and right sides of the central semicircular portion 52e, and a small-diameter semicylindrical portion 52f is formed at the tip of the left and right arm portions 52a. The pair of support pieces 52s are connected by bolts 59b and nuts 59n, so that an annular portion 52e is formed at the center, an arm portion 52a is provided on both sides of the annular portion 52e, and a small-diameter cylindrical portion 52f is provided at the tip of the arm portion 52a. Is formed.
With the above configuration, after the rubber plate material 58a is wound around the outer peripheral surface of the upper receiving port 22 of the drainage pipe joint 20, the outer peripheral surface of the upper receiving port 22 can be tightened by the annular portion 52e of the support member 52 from the outside. That is, in this state, the support tool 52 is fixed to the outer peripheral surface of the upper receiving port 22 of the drainage pipe joint 20. Then, the screw shaft 55 of the height adjusting mechanism 54 is passed through the small diameter cylindrical portions 52 f provided on the left and right sides of the support tool 52.

The height adjustment mechanism 54 is a mechanism for connecting the support 52 to the upper surface of the concrete slab CS in a state in which the height can be adjusted, and a pair of fixed flat plates 57 fixed to the upper surface of the concrete slab CS, and the screw shaft. 55 and a nut 56 that is screwed onto the screw shaft 55.
The fixed flat plate 57 is a substantially rectangular thick plate, and a long hole 57h through which the hole-in anchor bolt 57x is passed is formed on one end side. A boss 57b is erected on the other end side of the fixed flat plate 57, and the screw shaft 55 is screwed to the boss 57b. A pair of nuts 56 are screwed onto the screw shaft 55 so as to sandwich the small diameter cylindrical portion 52f of the support member 52 from above and below. For this reason, the height of the support tool 52 is adjusted by adjusting the positions of the upper and lower nuts 56 with respect to the screw shaft 55 erected on the upper surface of the concrete slab CS via the fixed flat plate 57. be able to.
An anti-vibration rubber 58b is attached between the fixed flat plate 57 and the upper surface of the concrete slab CS.

<Construction of drainage facility 10>
The construction of the above drainage facility 10 will be described.
First, the effective length H2 of the drainage stack 30 is determined from the floor height H0 (distance between the upper surfaces of the upper and lower concrete slabs) and the effective length H1 of the drainage pipe joint 20 shown in FIG. Here, the effective length H1 of the drainage pipe joint 20 is a value obtained by subtracting the penetration depth dimension D (= 65 mm) of the upper receiving port 22 from the total length of the drainage pipe joint 20. The effective length H2 of the drainage stack 30 is a value obtained by subtracting the standard penetration depth dimension Nst (= 70 mm) from the total length of the drainage stack 30. For this reason, the value obtained by subtracting the effective length H1 of the drainage pipe joint 20 from the floor height H0 is equal to the effective length H2 of the drainage stack 30. That is, the straight pipe 31 of the drainage stack 30 is cut so that the effective length of the drainage stack 30 is H2 = H0−H1.
Next, as shown in FIG. 2A, the upper end insertion opening 31z of the cut straight pipe 31 is connected to the lower connection mechanism 39 of the receiving socket 35, and the drainage stack 30 is assembled. Further, the restriction jig 60 is attached to the upper end portion of the receiving socket 35. The restriction jig 60 is attached to the socket socket 35 so that the insertion dimension of the lower connection portion 23 of the drain pipe joint 20 with respect to the socket socket 35 is 70 mm. Here, for example, when the straight pipe 31 is cut slightly short and the length of the drainage stack 30 is slightly reduced, the insertion dimension of the lower connection portion 23 of the drainage pipe joint 20 is set to 70 mm by the restriction jig 60. Make it smaller. The opening of the regulation jig 60 is closed with a curing lid 62.
At the present stage, as shown in FIG. 6, the description will be continued assuming that the drainage pipe joint 20 on the lower floor is supported by the concrete slab CS on the lower floor and that the construction on the lower floor and below has been completed.

Next, as shown in FIG. 6, the drainage stack 30 is erected, the socket socket 35 at the upper end is inserted into the through hole CH of the concrete slab CS on the upper floor, and the drainage stack 30 is lowered straightly. The lower end insertion port 31s is inserted and connected to the upper receiving port 22 of the drainage pipe joint 20 on the lower floor (see FIG. 7). The drainage stack 30 after connection is supported by a support material (not shown).
Next, after removing the curing lid 62 of the regulating jig 60, the lower body 21b of the drainage pipe joint 20 is inserted into the through hole CH of the concrete slab CS on the upper floor as shown in FIG. The lower connecting portion 23 is inserted into the receiving socket 35 from the regulation jig 60 of the drainage stack 30 on the lower floor. Here, the lower connecting portion 23 of the drainage pipe joint 20 is inserted into the receiving socket 35 until the locking portion 24 contacts the flange portion 68 of the regulating jig 60. As described above, the dimension T from the locking part 24 to the lower end surface of the lower connection part 23 of the drainage pipe joint 20 is about 130 mm, and the dimension from the upper surface of the flange part 68 of the regulating jig 60 to the lower surface of the step part 66. K is about 60 mm. For this reason, if the effective length of the drainage stack 30 is H2, the insertion dimension of the lower connection portion 23 of the drainage pipe joint 20 into the receiving socket 35 is dimension T-dimension K = 130 mm-60 mm = 70 mm.
Further, since the regulation jig 60 and the receptacle socket 35 are held coaxially, when the lower connection portion 23 of the drain pipe joint 20 is inserted into the receptacle socket 35, both 23 and 35 are held coaxially. For this reason, there is no problem that the lower connecting portion 23 of the drainage pipe joint 20 strongly hits a part of the annular sealing material 33 of the receiving socket 35 and the annular sealing material 33 is twisted.
Next, as shown in FIG. 1, the drainage pipe joint 20 on the upper floor is supported by the concrete slab CS via the support frame 50. Then, after the construction of the support frame 50 is completed, the regulation jig 60 is removed from the receptacle socket 35. Note that the through hole CH of the concrete slab CS is closed using the rock wool W and the mortar Mr as described above.
Thus, at the time of new installation, piping is performed by assembling the drainage pipe joint 20 and the drainage stack 30 in order from the lower floor.

<About the update of the drainage facility 10>
Next, the update of the drainage facility 10 will be described.
First, as shown in FIG. 8, after the support frame 50 is removed from the drainage pipe joint 20 on the lower floor, the connection between the upper body 21a and the lower body 21b of the drainage pipe joint 20 is released. In addition, the code | symbol B in FIG. 8 is a volt | bolt for the connection of the lower flange 41 and the upper flange 42, and the code | symbol N is a nut for the said bolt.
Next, the upper trunk 21a of the drainage stack 30 on the lower floor and the drainage pipe joint 20 on the lower floor are displaced upward by about 60 mm. As described above, since the regulation jig 60 is removed from the receptacle socket 35, the drainage stand of the lower floor is connected in a state where the receptacle socket 35 is connected to the lower connection portion 23 of the drainage pipe joint 20 of the upper floor. The tube 30 can be displaced upward by about 60 mm (the height of the regulation jig 60). By displacing the drainage stack 30 upward by about 60 mm, the lower connection portion 23 of the drainage pipe joint 20 is inserted into the receptacle socket 35 by about 130 mm as shown by a two-dot chain line in FIG. Is done.
Next, as shown in FIG. 8, the lower floor drainage pipe 30 and the upper body 21a of the lower floor drainage pipe joint 20 are integrally displaced at an angle of about 5 ° (displaced) downward. Thus, the socket socket 35 of the drainage stack 30 on the lower floor B can be removed from the lower connection portion 23 of the drainage pipe joint 20 on the upper floor. Furthermore, the old drainage stack 30 is removed by pulling out the drainage stack 30 removed from the upper receptacle 22 of the upper body 21a.

Next, after the interior is cleaned in the state where the upper body 21a and the lower body 21b of the drainage pipe joint 20 on the lower floor are separated, necessary repairs are performed. That is, slime and the like adhering to the inner surfaces of the upper body 21a and the lower body 21b are scraped and removed by a wire brush or other tools, and then painted or resin-coated. Further, the seal material (not shown) and the packing of the upper receptacle 22 of the upper body 21a are replaced with new ones. Thereby, the drain pipe joint 20 becomes a state close to a new article, and a predetermined drainage performance can be secured.
In this way, when the repair of the drainage pipe joint 20 is completed, a new drainage stack 30 is attached in a procedure reverse to the above. That is, the new drainage stack 30 and the upper body 21 a are integrally displaced upward from the oblique state, and the lower connection portion 23 of the drainage pipe joint 20 on the upper floor is inserted into the receiving socket 35 of the drainage stack 30. In this state, the upper body 21a is temporarily placed on the lower body 21b in the drainage pipe joint 20 on the lower floor, while the drainage stack 30 and the upper body 21a are further displaced upward together. Next, the lower flange 41 of the upper body 21a and the upper flange 42 of the lower body 21b are formally connected via packing, thereby completing the update of the drainage stack 30 on the lower floor B.

<Advantages of the drainage facility 10 according to this embodiment>
According to the drainage facility 10 according to the present embodiment, the connection between the upper body 21a and the lower body 21b of the drainage pipe joint 20 on the lower floor is released, and then the receptacle socket 35 of the drainage stack 30 and the drainage pipe joint on the upper floor. The drainage stack 30 can be removed by moving the drainage stack 30 and the upper body 21a upward and tilting them while maintaining the connection with the lower connection part 20 of the 20th. Further, the drainage stack 30 can be attached by the reverse operation. That is, the drainage stack 30 can be updated by so-called exchange. For this reason, it becomes unnecessary to cut the old drainage stack 30, and the old drainage stack 30 can be easily removed. In addition, an exchange joint or the like for adjusting the pipe length is not required in the middle portion of the drainage stack 30 as in the conventional case, so that the cost can be reduced and the new drainage stack 30 and the like can be easily restored. Become.
Further, the outlet socket 35 of the drainage stack 30 and the upper receiving port 22 of the drainage pipe joint 20 are disposed when the upper and lower drainage pipe joints 20 are displaced in the horizontal direction due to interlayer displacement due to an earthquake. It is comprised so that the watertightness can be maintained so as not to prevent the inclination. For this reason, the seismic performance of the drainage facility 10 can be ensured.
In particular, the receptacle socket 35 of the drainage stack 30 can be inclined with respect to the lower connecting portion 23 of the drainage pipe joint 20 on the upper floor by the angle of the upper and lower tapered surfaces 34u and 34d with the annular seal member 33 as a fulcrum. Become. Here, since the angle (6 °) of the tapered surfaces 34u and 34d is set to be equal to or greater than the maximum inclination angle (less than 1 °) of the drainage stack 30 due to the earthquake, the inclination of the drainage stack 30 even if an earthquake occurs. Is not hindered and watertightness is maintained.

Further, the upper receiving port 22 of the drainage pipe joint 20 includes a receiving port main body portion 26 that houses the sealing material 27, and an inner flange portion 22f that holds the sealing material 27 on the upper side of the receiving port main body portion 26. The inner peripheral surface is a tapered surface 22t (about 6 °) that expands upward. For this reason, the drainage stack 30 can be inclined by the angle of the taper surface 22t with respect to the upper receiving port 22 of the drainage pipe joint 20 on the lower floor by the action of the taper surface 22t of the inner flange portion 22f and the sealing material 27. Become.
Moreover, since the insertion depth dimension of the lower connection part 23 of the drainage pipe joint 20 with respect to the receptacle socket 35 of the drainage stack 30 can be kept constant by the regulation jig 60, the insertion depth dimension is set to a specified value (70 mm to 50 mm). Thus, even when the drainage stack 30 is inclined during an earthquake, sealing performance can be ensured.
Further, a support tool 52 capable of supporting the drain pipe joint 20 is attached to the outer peripheral surface of the upper receiving port 22 of the drain pipe joint 20, and the support tool 52 is connected to the concrete slab CS via the height adjusting mechanism 54. Connected to the top surface. For this reason, when the lower connection portion 23 of the drainage pipe joint 20 is inserted into the receiving socket 35 of the drainage stack 30, the height of the drainage pipe joint 20 can be adjusted by the height adjustment mechanism 54. Thereby, after the connection between the lower connection portion 23 of the drainage pipe joint 20 and the receptacle socket 35 of the drainage stack 30 on the lower floor is completed, the regulation jig 60 can be removed.
The drainage stack 30 is composed of a socket socket 35 having an upper socket and a straight pipe 31 connected to the socket 35. For this reason, when the drainage stack 30 is updated, only the straight pipe 31 can be updated and the receptacle socket 35 can be reused.

<Example of change>
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention. For example, in the drainage facility according to the present embodiment, an example in which the drainage stack 30 is configured by a cast iron receiving socket 35 and a straight pipe 31 made of hard PVC lining steel pipe is shown. However, as shown in FIG. 9A, the receptacle socket 35 and the straight tube 31 are made of resin, and the upper end insertion port 31u of the straight tube 31 is inserted and connected to the lower connection port 35w of the receptacle socket 35 for bonding. It is also possible to employ a configuration in which bonding is performed using an agent or the like. In this case, it is preferable that the main body portion 35m of the socket socket 35 and the upper end ring portion 35r for holding the annular sealing material 33 are individually manufactured and bonded. Further, as shown in FIG. 14A, the receiving socket 35 and the straight pipe 31 can be integrally formed by a resin pipe.
Further, as shown in FIG. 9B and FIG. 10, a drainage pipe joint 20 is formed with a fireproof double layer structure in which the resin socket socket 35 and the straight pipe 31 are covered with outer pipes 71 and 72 made of fireproof fiber mortar. It is also possible to adopt a fireproof two-layer structure. In this case, as shown in FIG. 9 (B), it is preferable that the restriction jig 60 is made of fireproof fiber mortar, is held while being newly installed, and is removed by cutting or the like when the drainage stack 30 is updated. Even in the case of a fireproof two-layer structure, as shown in FIG. 14B, the receiving socket 35 and the straight pipe 31 can be integrally formed with a resin pipe.
Further, in the receptacle socket 35 according to the present embodiment, an example in which the seal groove 34m of the upper end ring portion 34 is formed in a square cross section has been shown, but as shown in FIGS. 11A, 11B, and 11C, the seal groove It is also possible to incline the upper side surface 341 and / or the lower side surface 342 of the seal groove 34m so that the opening side of 34m becomes wider. Further, as shown in FIGS. 11D and 11E, in a state where the upper side surface 341 and the lower side surface 342 of the seal groove 34m are inclined, a wedge-shaped protrusion 34f is formed on the bottom surface of the seal groove 34m, It is also possible to form a V-groove 33e into which the projection 34f is fitted in the sealing material 33. Thereby, twisting of the annular sealing material 33 can be prevented. Moreover, although the example which forms the cyclic | annular sealing material 33 in a cross-sectional circle shape was shown, as shown to FIG. 12 (A) (B) (C), the part which protrudes from the seal groove 34m is formed in a semicircular cross-section, It is also possible to mold the portion accommodated in the groove 34m according to the cross-sectional shape of the seal groove 34m. Thereby, twisting of the annular sealing material 33 can be prevented with a simple configuration.
Moreover, in this embodiment, although the example which forms the latching | locking part 24 in the outer peripheral surface of the lower connection part 23 of the drain pipe joint 20 was shown, as shown in FIG. 13, the drainage from the through-hole CH of concrete slab CS. A configuration in which the locking portion 24 is not provided in accordance with the protruding dimension of the lower connection portion 23 of the pipe joint 20 is also possible.

Further, in this embodiment, the inclination angle of the tapered surface 22t of the upper receptacle 22 in the drain pipe joint 20 is about 6 °, and the inclination angles of the upward tapered surface 34u and the downward taper surface 34d of the receptacle socket 35 in the drain stack 30 are about. Although an example of setting to 6 ° has been shown, it is possible to make the inclination angle larger than 6 °.
In the present embodiment, as shown in FIG. 2A, the required minimum penetration depth dimension Nmin of the socket socket 35 is about 50 mm, the standard penetration depth dimension Nst is about 70 mm, and the maximum penetration depth Nmax. Although an example of setting to 130 mm is shown, the above dimensions can be changed as appropriate. Similarly, an example in which the depth of penetration of the upper receiving port 22 of the drain pipe joint 20 is set to about 65 mm has been shown, but the above dimensions can be changed as appropriate.

Further, as shown in FIG. 15 (A), the outer periphery of the lower connection portion 23 of the drainage pipe joint 20 in a state where the lower connection part 23 of the drainage pipe joint 20 is inserted and connected to the receiving socket 35 of the drainage stack 30. It is preferable to set the gap dimension F between the surface and the inner peripheral surface of the socket socket 35 between 2 mm and 12 mm (7 mm ± 5 mm). Here, FIG. 15A shows an example in which the receptacle socket 35 is constituted by the main body portion 35m and the upper end ring portion 35r. However, as shown in FIGS. 16A, 16B, and 16C, the receptacle socket 35 is shown. It is also possible to integrate the main body portion 35m and the upper end ring portion 35r constituting the portion 35. Furthermore, as shown in FIG. 16C and the like, it is preferable in terms of strength to provide ribs 35x at equal intervals in the circumferential direction on the outer periphery of the boundary portion between the lower connection port 35w of the receiving socket 35 and the main body portion 35m. Here, in FIG. 16A, an example in which the receiving socket 35 and the straight pipe 31 are covered with the outer pipes 71 and 72 made of fireproof fiber mortar is shown, but instead of the outer pipes 71 and 72 made of fireproof fiber mortar, It is also possible to cover with a fireproof sound insulation sheet or the like.
Moreover, although the example which comprises the receptacle socket 35 from the main-body part 35m and the upper end ring part 35r was shown, as shown to FIG. 15 (A) and FIG. 16, as shown to FIG. 15 (B), the said upper end is shown. Instead of the ring portion 35r, a reduced diameter portion 35s is formed at the upper end portion of the main body portion 35m, and a substantially semicircular cross-sectional seal groove 35e into which the annular seal member 33 is fitted is formed on the inner peripheral surface of the reduced diameter portion 35s. It is also possible to provide a configuration.

Also, as shown in FIGS. 9, 14, 15A, etc., the lower end portion of the upper end ring portion 35r of the socket socket 35 is fitted inside the upper end of the main body portion 35m, and the upper end ring portion 35r is inserted into the main body portion. Although an example of fixing to 35 m is shown, as shown in FIGS. 17A and 17B, the upper end ring portion 76 is fixed to the main body portion 35 m by covering the upper end ring portion 76 on the upper end outside of the main body portion 35 m. It is also possible to configure. That is, the upper end ring portion shown in FIG. 17A includes an inner flange portion 76f and a cylindrical portion 76t that are coaxially positioned, and the annular sealing material 33 is fitted on the inner peripheral surface of the inner flange portion 76f. A seal groove 76m is formed. Further, the cylindrical portion 76t of the upper ring portion is configured such that the tip (upper end) of the main body portion 35m of the socket socket 35 is inserted.
That is, the cylindrical portion 76t of the upper end ring portion 76 corresponds to the lower end connection port of the upper end ring portion in the present invention, and the main body portion 35m of the receiving port socket 35 corresponds to the upper receiving port in the present invention.
Here, in order to reduce the thickness of the boundary corner portion between the inner flange portion 76f and the cylindrical portion 76t of the upper end ring portion 76 as much as possible, as shown in FIG. It is also possible to provide a stealing part 76d.

It is a whole side view of the drainage equipment concerning Embodiment 1 of the present invention. Longitudinal sectional view (Drawing A) of the receptacle socket of the drainage pipe, Enlarged longitudinal sectional view (Fig. It is an expanded longitudinal cross-sectional view (D figure) of a part. It is a longitudinal cross-sectional view showing the usage condition of a control jig. It is a longitudinal cross-sectional view (A figure) and a top view (B figure) of a control jig. It is a perspective view of the support and the height adjustment mechanism which support a drainage pipe joint. It is a side view showing the construction procedure of drainage. It is a side view showing the construction procedure of drainage. It is a side view (A figure) showing the update procedure of drainage, and the B section longitudinal cross-sectional view (B figure) of A figure. It is a longitudinal cross-sectional view (A figure) (B figure) showing the example of a change of the upper receptacle of a drainage stack. It is a longitudinal cross-sectional view showing the example of a change of the upper receptacle of a drainage stack. It is a longitudinal cross-sectional view (A figure)-(E figure) showing the example of a change of the seal groove of an upper receptacle, and a cyclic | annular sealing material. It is a longitudinal cross-sectional view (A figure)-(C figure) showing the example of a change of the seal groove of an upper receptacle, and an annular sealing material. It is a side view showing the example of a change of a drainage pipe coupling. It is a longitudinal cross-sectional view (A figure) (B figure) showing the example of a change of the upper receptacle of a drainage stack. It is a longitudinal cross-sectional view (A figure) (B figure) showing the example of a change of the upper receptacle of a drainage stack. It is a longitudinal cross-sectional view (A figure) (B figure) (C figure) showing the example of a change of the upper receptacle of a drainage stack. It is a longitudinal cross-sectional view (A figure) (B figure) showing the example of a change of the upper receptacle of a drainage stack. It is a side view showing the conventional drainage equipment. It is a side view showing the conventional drainage equipment.

Explanation of symbols

CS ... Concrete slab CH ... Through hole Mr ... Mortar W ... Rock wool 10 ... Drainage equipment 20 ... Drain pipe joint 21a ... Upper body 21b ... Lower body 22 ... · Upper receiving port 22f · · Inner flange 22t · · Tapered surface 23 · · · lower connection portion 24 · · · locking portion 30 · · · drainage pipe 31 · · · straight pipe 31s · · · lower end insertion port 33 · · · Annular seal 34u ··· Upward taper surface 34d · · Downward taper surface 35 ··· Receptacle socket (upper receptacle)
41 ... Lower flange (connecting mechanism)
42 ... Upper flange (connection mechanism)
52... Support tool 54... Height adjustment mechanism 60.

Claims (10)

The lower connection part of the drainage pipe joint installed through the concrete slab on the upper floor of the apartment building is inserted and connected to the upper receptacle of the drainage stack on the lower floor, and the lower end insertion port of the drainage stack is on the lower floor A drainage facility configured to be inserted and connected to a top receiving port of a drainage pipe joint installed through a concrete slab of
The drainage pipe joint is configured to connect the upper body including the upper receiving port, the lower body including the lower connection portion, the upper body and the lower body in a watertight state, and to be able to release the connection. And
In the state where the connection between the upper body and the lower body of the drainage pipe joint on the lower floor is released, and then the connection between the upper receptacle of the drainage stack and the lower connection part of the drainage pipe joint on the upper floor is maintained. The drainage standpipe is moved upward together with the upper body, and further inclined, so that the drainage standpipe can be removed, and the drainage standpipe can be attached by the reverse operation,
The upper receiving port of the drainage stack and the upper receiving port of the drainage pipe joint are inclined when the drainage pipe joint on the upper floor and the lower floor are relatively displaced in the horizontal direction due to an interlayer displacement due to an earthquake. A drainage system that is constructed so as not to hinder and maintain water tightness. A drainage facility according to claim 1,
A seal groove is formed on the inner peripheral surface of the upper receiving port of the drainage stack so as to extend in the circumferential direction, and an annular seal material is fitted into the seal groove, and is above the annular seal material. the inner circumferential surface of the upper receptacle has a tapered surface that widens upwardly located, the inner peripheral surface of the upper receptacle located below said sealing member has a tapered surface expanding downward Drainage equipment characterized by that. A drainage facility according to claim 1 or claim 2,
The upper receiving port of the drainage pipe joint includes a receiving port main body portion that stores a substantially cylindrical sealing material, and an inner flange portion that holds the substantially cylindrical sealing material above the receiving port main body portion,
The drainage facility, wherein an inner peripheral surface of the inner flange portion is a tapered surface that expands upward. A drainage facility according to any one of claims 1 to 3,
The clearance dimension between the outer peripheral surface of the lower connecting portion of the drainage pipe joint inserted into the upper receiving port of the drainage stack and the inner peripheral surface of the upper receiving port of the drainage stack is set between 2 mm and 12 mm. Drainage equipment characterized by that. A drainage facility according to any one of claims 1 to 4,
The upper receiving port of the drainage stack is engaged from the axial direction with a locking portion formed on the outer peripheral surface of the lower connecting portion of the drainage pipe joint, and the insertion depth dimension of the lower connecting portion with respect to the upper receiving port is set. A drainage system characterized in that a cylindrical regulation jig that is held constant can be mounted coaxially. A drainage facility according to any one of claims 1 to 5,
A support that can support the drainage pipe joint is attached to the outer peripheral surface of the upper receiving port of the drainage pipe joint, and the support is fixed to the upper surface of the concrete slab via a height adjustment mechanism. Drainage equipment characterized by that. A drainage facility according to any one of claims 1 to 6,
The drainage stand is constituted by a socket having the upper receiving port and a straight pipe connected to the socket. A drainage facility according to any one of claims 1 to 6 ,
The drainage stand is characterized in that an upper receiving port and a straight pipe are integrally formed. A drainage facility according to claim 2 ,
The upper end portion of the upper end of the drainage stack is inserted into the lower end connection port of the upper end ring portion, so that the upper end ring portion is fixed to the upper end opening, and the upper inner peripheral surface of the upper end ring portion The drainage system is characterized in that a sealing groove for holding the annular sealing material is formed coaxially with the upper receiving port. A drainage facility according to claim 2 ,
The upper end of the upper receiving port of the drainage stack is provided with an upper end ring portion formed with a seal groove for holding the annular sealing material on the inner peripheral surface, and the upper receiving port and the upper ring portion are integrated. Drainage equipment characterized by being molded.

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