JP7431507B2 - Piping structure and construction method of piping structure - Google Patents

Description

The present invention relates to a piping structure and a method of constructing a piping structure.

Conventionally, a piping structure is known that includes a leg joint and a support part (first support part) that connects the leg joint to a floor slab (for example, see Patent Document 1). The leg joint has a standpipe part to which the standpipe is connected, a horizontal pipe part to which the horizontal pipe is connected, and a bent pipe part to connect the standpipe part and the horizontal pipe part.
The support connects the horizontal pipe and the floor slab.

Japanese Patent Application Publication No. 2004-270219

Generally, in order to efficiently flow wastewater and the like flowing through a piping structure downstream, a drainage gradient is formed in the horizontal pipe portion of the leg joint, which extends downward toward the downstream side.
However, with the piping structure disclosed in Patent Document 1, it is not possible to stably ensure a drainage gradient due to the horizontal pipe portion.

The present invention has been made in view of these problems, and an object of the present invention is to provide a piping structure and a method for constructing the piping structure that can stably ensure a drainage slope by the horizontal pipe portion of the leg joint. do.

In order to solve the above problems, the present invention proposes the following means.
The piping structure of the present invention includes a standpipe section including a socket to which the standpipe is connected to the end , and a socket to which the resin horizontal pipe is connected to the end with an adhesive , and A resin leg joint having a horizontal pipe portion having a large outer diameter and a large inner diameter , and a bent pipe portion connecting the vertical pipe portion and the horizontal pipe portion; a first support part that has a fixing support fitting and connects the horizontal pipe part and the floor slab, which is arranged below the floor slab; and a support piece that comes into contact with the lower end of the socket in the vertical pipe part. and a second support part connecting the stand pipe part and the floor slab, the horizontal pipe part being longer than the stand pipe part, and the side wall of the bent pipe part having the side wall. A radially penetrating opening is formed , and a lid is attached to the opening. It is characterized by being made of a resin that is a graft copolymerization of a polymer and an impact-improving resin .
According to this invention, when the leg joint swings from the standpipe part as a starting point, the position and posture of the horizontal pipe part are not stabilized. The above-mentioned rocking motion of the vertical pipe section is easily influenced by gravity acting on the horizontal pipe section. By connecting the horizontal pipe section and the floor slab through the first support section, the swinging of the leg joint from the standpipe section is effectively suppressed, and the drainage slope caused by the horizontal pipe section of the leg joint is stabilized. and can be secured.
In addition, if the horizontal pipe part is longer than the standpipe part, compared to when the horizontal pipe part is shorter than the standpipe part, when the leg joint swings from the standpipe part as a starting point, the tip of the horizontal pipe part section is significantly displaced in the vertical direction. Even in this case, since the horizontal pipe part and the floor slab are connected by the first support part, vertical displacement of the tip part of the horizontal pipe part is suppressed, and the leg joint is connected to the horizontal pipe part. It can be easily accommodated in the space below the floor slab located above.
Furthermore, the two support parts, the first support part and the second support part, allow the leg joint to be connected to the floor slab more reliably.

Moreover, in the above piping structure, the second support portion may connect the bent pipe portion and the floor slab.
According to this invention, the two support parts, the first support part and the second support part, can connect the leg joint to the floor slab more reliably.

Further, a method for constructing a piping structure according to the present invention is a method for constructing a piping structure in which the piping structure according to any one of the above is constructed in a building including the floor slab, wherein the leg joint is attached to the floor slab. a connecting step of connecting the horizontal pipe part of the leg joint and the floor slab by the first support part; and a connecting step of connecting the horizontal pipe part of the leg joint to the floor slab, and a filling step of filling a space between the standpipe connected to the standpipe portion of the leg joint and the floor slab with a filler material.
According to this invention, when the leg joint swings from the standpipe part as a starting point, the position and posture of the horizontal pipe part are not stabilized. The above-mentioned rocking motion of the vertical pipe section is easily influenced by gravity acting on the horizontal pipe section. By connecting the horizontal pipe section and the floor slab through the first support section, the swinging of the leg joint from the standpipe section is effectively suppressed, and the drainage slope caused by the horizontal pipe section of the leg joint is stabilized. and can be secured. Furthermore, by filling the space between the standpipe and the floor slab with a filler, it is possible to more reliably suppress the swinging of the standpipe portion to which the standpipe is connected.

According to the piping structure and the method for constructing the piping structure of the present invention, it is possible to stably ensure a drainage gradient due to the horizontal pipe portion of the leg joint.

BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view of the main part of the multi-story building in which the drainage structure of 1st Embodiment of this invention is used. It is a front view of the leg joint and the 2nd support part in the same drainage structure. It is a front view of the 1st support part in the same drainage structure. It is a flow chart showing a construction method of a drainage structure in a 1st embodiment of the present invention. It is a front view of the 1st support part of the drainage structure in the 1st modification of 1st Embodiment of this invention. It is a side view of the drainage structure in the 2nd modification of 1st Embodiment of this invention. It is a front view of the leg joint and the 2nd support part in the same drainage structure. It is a side view of the drainage structure in the 3rd modification of 1st Embodiment of this invention. It is a front view of the leg joint and the 2nd support part in the same drainage structure. It is a side view of the drainage structure of 2nd Embodiment of this invention. 11 is a sectional view taken along cutting line AA in FIG. 10. FIG. It is a sectional view of the lid body in the same drainage structure.

(First embodiment)
Hereinafter, a multi-story building (building) in which a first embodiment of the piping structure according to the present invention is used will be described with reference to FIGS. 1 to 9, taking as an example the case where the piping structure is a drainage structure.
As shown in FIG. 1, in the multi-story building 1, a plurality of vertically stacked layers 5 are partitioned by floor slabs 6 that the multi-story building 1 includes. The floor slab 6 is formed with a through hole 6a that penetrates in the vertical direction.

Drainage structure 11 is used in multi-story building 1. The drainage structure 11 includes a leg joint 12, a collective joint 26, stand pipes 36, 37, horizontal pipes 39, 40, a first support part 46, and a second support part 51.
As shown in FIGS. 1 and 2, the leg joint 12 includes a vertical pipe section 13, a horizontal pipe section 14, and a bent pipe section 15. In addition, in FIG. 1, the boundary between the horizontal pipe part 14 and the curved pipe part 15 is shown by a two-dot chain line. In FIG. 2, the first support portion 46 is shown by a two-dot chain line.

The standpipe section 13 is formed into a straight tube shape, and the axis O1 of the standpipe section 13 is along the vertical direction (that is, the axis O1 of the standpipe section 13 is parallel to the tube axis of the standpipe 37). It is located. The standpipe section 13 is arranged below the floor slab 6. Note that the arrangement of the standpipe section 13 is not limited to this, and the standpipe section 13 may be arranged so that the axis O1 is inclined with respect to the vertical direction. A standpipe connection portion 18 that is a socket is formed in the standpipe portion 13 . Note that the connection type of the standpipe connection portion 18 is not limited to a socket, but may be a spigot, a flange, or the like. When the connection type of the standpipe connection part 18 is a socket, the inside of the standpipe connection part 18 may be provided with a rubber packing to stop water, and when the standpipe connection part 18 is made of resin, , the standpipe connecting portion 18 may be connected to the standpipe 37 with adhesive. The same applies to the horizontal pipe connecting portion 19, horizontal pipe connecting portion 31, etc., which will be described later.

The horizontal tube portion 14 is formed into a straight tube shape, and is arranged so that the axis O2 of the horizontal tube portion 14 substantially extends along a horizontal plane. More specifically, the horizontal pipe portion 14 is arranged such that the axis O2 moves downward as it goes downstream, and a drainage gradient is formed in the horizontal pipe portion 14.
At the downstream end of the horizontal pipe portion 14, a horizontal pipe connecting portion 19, which is a flange, is formed.
In this example, the length L2 of the horizontal pipe section 14 along the axis O2 is longer than the length L1 of the vertical pipe section 13 along the axis O1. For example, if there is no part along the axis O2 in the horizontal tube part, or if the part along the axis O2 is short, or if the part of the horizontal tube part supported by the first support part 46 is bent, This makes it difficult to support the horizontal tube portion by the first support portion 46. On the other hand, by forming the horizontal tube portion 14 into a straight tube shape as in this embodiment, the horizontal tube portion 14 can be easily supported by the first support portion 46 .

The bent tube portion 15 is formed into a curved tube shape. The bent pipe section 15 connects the vertical pipe section 13 and the horizontal pipe section 14. A boss 20 is formed at the lower part of the bent pipe portion 15. The boss 20 projects downward from the outer circumferential surface of the lower portion of the curved pipe portion 15 .
In this example, the entire leg joint 12 including the stand pipe section 13, the horizontal pipe section 14, and the bent pipe section 15 is arranged below the floor slab 6.
The leg joint 12 may be made of resin such as polyvinyl chloride (PVC). It is particularly preferable that the leg joint 12 be made of a resin having excellent impact resistance.

Resins with excellent impact resistance include, for example, vinyl chloride resins such as (1) a resin in which a polyvinyl chloride polymer is mixed with an impact-improving resin, and (2) a resin in which a polyvinyl chloride polymer and an impact-improving resin are grafted. copolymerized resin, (3) a copolymer of a vinyl chloride monomer and a monomer having an unsaturated bond that can be copolymerized with the vinyl chloride monomer, (4) a (co)polymer other than vinyl chloride containing vinyl chloride. Examples include graft copolymers obtained by graft copolymerization. These (1) to (4) may be used alone or in combination of two or more. Further, the polyvinyl chloride resin may be chlorinated if necessary.

Examples of the impact-improving resin to be mixed with the polyvinyl chloride polymer in (1) above and the impact-improving resin to be graft copolymerized with the polyvinyl chloride polymer in (2) above include resins with rubber properties. It will be done. Specific examples include acrylonitrile-butadiene-styrene copolymer, methyl methacrylate-butadiene-styrene copolymer, acrylic rubber, chlorinated polyethylene, ethylene-vinyl acetate copolymer resin, acrylonitrile-butadiene copolymer, etc. . These may be used alone or in combination of two or more.

The leg joint 12 may also be made of metal. Particular examples of metal include cast iron, and in the case of cast iron, which is heavier than resin, it is more difficult to secure a drainage slope than in resin, and the effect obtained by the present invention is higher.

The configuration of the collective joint 26 is not particularly limited. In this example, the collective joint 26 is composed of two members, an upper connecting pipe 27 and a lower connecting pipe 28. Note that the collective joint may be integrally formed of one member, or may be formed of three or more members.
The upper connecting pipe 27 includes a pipe main body 30, a horizontal pipe connecting part 31 fixed to the outer peripheral surface of the pipe main body 30, and a vertical pipe connecting part 32 fixed to the upper end of the pipe main body 30.
The tube body 30 is disposed above the leg joint 12 so that its axis extends in the vertical direction. In this example, a plurality of horizontal tube connecting portions 31 are fixed to the outer circumferential surface of the tube body 30. Note that the number of horizontal tube connecting portions 31 fixed to the tube body 30 is not particularly limited, and may be one or two or more.
The collective joint 26 may be made of resin such as polyvinyl chloride (PVC), or may be made of metal such as cast iron.

The lower connecting pipe 28 is formed into a tubular shape whose outer diameter and inner diameter become smaller as they go downward. Note that the lower connecting pipe 28 may have substantially the same outer diameter and inner diameter as the pipe main body 30, but should be at least the same as or larger than the outer diameter and inner diameter of the standpipe 36. The lower end of the lower connecting pipe 28 is a spigot. The lower connecting pipe 28 is fixed to the lower end of the tube body 30 of the upper connecting pipe 27. Note that the lower end of the lower connecting pipe 28 may be a socket, a flange, or the like. The lower connection pipe 28 is not connected to the standpipe connection part 18 of the leg joint 12 via the standpipe 37, and the lower connection 28 of the collective joint 26 and the standpipe connection part 18 of the leg joint 12 are directly connected. You can leave it there.

In the collective joint 26 configured in this way, the horizontal pipe connection part 31 and the standpipe connection part 32 are arranged above the floor slab 6, and at least a part of the lower connection pipe 28 is connected to the through hole of the floor slab 6. 6a.
A filling material 7 such as mortar is filled between the opening peripheral portion of the through hole 6a in the floor slab 6 and the lower connecting pipe 28. The filler 7 is arranged to close the through hole 6a.
Note that the filler 7 may be glass wool (GW), rock wool (RW), or the like. However, by using mortar as the filler 7, the positions of the lower connecting pipe 28 and the standpipe 37 with respect to the floor slab 6 are fixed by the filler 7. Since glass wool and rock wool are composed of fibers, the position of the lower connecting pipe 28 and the like relative to the floor slab 6 cannot be fixed. Therefore, even if the weight balance of the leg joint 12 connected to the standpipe 37 is poor, the direction of the drainage gradient set in the horizontal pipe portion 14 of the leg joint 12 can be maintained.

The lower end of the standpipe 36 is connected to the standpipe connection portion 32 of the collective joint 26 . The standpipe 36 is connected to sanitary equipment (not shown) such as a toilet bowl, a dressing table, and a sink, which are arranged in the layer 5 above the layer 5 (hereinafter also referred to as layer 5A) in which the upper connection pipe 27 of the collective joint 26 is arranged. The wastewater discharged from the drainage equipment (drainage equipment) is guided to the collective joint 26.
The upper end of the standpipe 37 is connected to the lower end of the lower connecting pipe 28 of the collective joint 26. The lower end of the standpipe 37 is connected to the standpipe connecting portion 18 of the standpipe section 13 of the leg joint 12.

The horizontal pipe 39 is connected to the horizontal pipe connecting portion 31 of the collective joint 26. The horizontal pipe 39 guides wastewater discharged from unillustrated sanitary equipment arranged in the layer 5A to the collection joint 26.
The horizontal pipe 40 is connected to the horizontal pipe connecting portion 19 of the horizontal pipe portion 14 of the leg joint 12. The horizontal pipe 40 guides the wastewater led to the collective joint 26 to a wastewater treatment facility (not shown) or the like outside the multi-story building 1 via the leg joints 12.

As shown in FIGS. 1 and 3, the first support section 46 is a so-called single-hung type support section. The first support portion 46 connects the horizontal pipe portion 14 of the leg joint 12 and the floor slab 6. The first support portion 46 includes a support fitting 47, a rod 48, and an anchor 49.
Although not shown, the support fitting 47 includes, for example, a metal band-like member and an opening/closing mechanism that connects both ends of the band-like member to each other. The opening/closing mechanism can be switched between a connected state in which both ends of the band member are connected to each other, and a released state in which the both ends are disconnected.
When the opening/closing mechanism is in the released state, the horizontal pipe part 14 of the leg joint 12 can be inserted from the outside of the U-shaped belt member into the belt member, or the horizontal pipe part 14 can be inserted from inside the belt member to the outside of the belt member. The portion 14 can be taken out.
On the other hand, when the opening/closing mechanism is brought into the connected state, the horizontal tube portion 14 within the band-shaped member is fixed to the band-shaped member.

A male thread is formed on the outer peripheral surface of the rod 48 over the entire length of the rod 48. The rod 48 is a so-called fully threaded bolt. The rods 48 are arranged along the vertical direction. The lower end of the rod 48 is fixed to a band-shaped member of the support fitting 47.
Anchor 49 is embedded in the lower end of floor slab 6. The female thread formed in the anchor 49 is exposed to the outside of the floor slab 6 from the lower surface of the floor slab 6. The male thread at the upper end of the rod 48 is fitted into the female thread of the anchor 49 .
Note that the configuration of the first support portion 46 is not limited to this.

As shown in FIGS. 1 and 2, the second support portion 51 connects the bent pipe portion 15 of the leg joint 12 and the floor slab 6. The second support portion 51 includes a support member 52, a rod 53, a nut 54, and an anchor 55.
The support member 52 has an L-shaped cross section perpendicular to the longitudinal direction. The support member 52 is arranged to extend in a direction along the horizontal plane and perpendicular to the axis O2 of the horizontal tube portion 14. The support members 52 protrude from the leg joints 12 on both sides in the orthogonal direction. Through holes (not shown) penetrating in the vertical direction are formed at both ends of the support member 52 in the orthogonal direction.
The support member 52 supports the boss 20 of the leg joint 12 from below.

The rods 53 are configured similarly to the rods 48, and a pair of rods 53 are provided in the second support portion 51. The rods 53 are arranged along the vertical direction. The lower end of the rod 53 is inserted into the through hole of the support member 52 and fixed to the support member 52 with a nut 54 .
Anchor 55 is embedded in the lower end of floor slab 6. The female thread formed in the anchor 55 is exposed to the outside of the floor slab 6 from the lower surface of the floor slab 6. The male thread at the upper end of the rod 53 is fitted into the female thread of the anchor 55.
Although the second support portion 51 connects the bent pipe portion 15 and the floor slab 6, the second support portion connects the vertical pipe portion 13 of the leg joint 12 and the floor slab 6. Alternatively, the second support portion may connect the standpipe portion 13 and the bent pipe portion 15 of the leg joint 12 to the floor slab 6.

Note that each of the first support part 46 and the second support part 51 may be provided with rubber having vibration-proofing properties. This rubber is disposed, for example, between the band-shaped member and the horizontal tube part 14 in the first support part 46.
The first support part 46 and the second support part 51 may be made of resin instead of metal.

Here, as shown in FIG. 1, an axis passing through the standpipe portion 13 and perpendicular to the axis O1 and the axis O2 is defined as O3.
Further, an axis passing through a portion where the second support portion 51 supports the leg joint 12 and perpendicular to the axis O1 and the axis O2 is defined as O4. If the drainage structure 11 does not include the first support portion 46 and the vertical pipe 37 and the horizontal pipe 40 are not connected to the leg joint 12, the leg joint 12 swings around the axis O4. Since the leg joint 12 is connected to the standpipe 37 fixed to the floor slab 6 by the filler 7, swinging of the leg joint 12 around the axis O4 can be suppressed.

Next, a method for constructing the drainage structure 11 according to the present embodiment, in which the drainage structure 11 configured as described above is constructed in the multi-story building 1, will be described. FIG. 4 is a flowchart showing a drainage structure construction method S according to an embodiment of the present invention.
First, in the installation process (step S1 in FIG. 4), the leg joint 12 is installed at a predetermined position below the floor slab 6. When the installation process S1 is completed, the process moves to step S2.
Next, in a connecting step S2, the horizontal pipe portion 14 of the leg joint 12 and the floor slab 6 are connected by the first support portion 46. When the connection step S2 is completed, the process moves to step S3.

Next, in a connecting step S3, the standpipe 37 is connected to the standpipe connecting portion 18 of the standpipe portion 13 of the leg joint 12. In the connecting step S3, the standpipe 37 is further connected to the lower connecting pipe 28 of the collective joint 26. The stand pipe 36 is connected to the stand pipe connection part 32 of the collective joint 26, and the horizontal pipe 39 is connected to the horizontal pipe connection part 31 of the collective joint 26. The horizontal pipe 40 is connected to the horizontal pipe connecting portion 19 of the horizontal pipe portion 14 of the leg joint 12.
When the connection step S3 is completed, the process moves to step S4.

Next, in a filling step S4, the filler 7 is filled between the standpipe 37 connected to the standpipe portion 13 of the leg joint 12 and the opening peripheral portion of the through hole 6a in the floor slab 6. The filler 7 is also filled between the opening periphery of the through hole 6 a in the floor slab 6 and the lower connecting pipe 28 of the collective joint 26 .
When the filling step S4 is completed, all steps of the drainage structure construction method S are completed, and the drainage structure 11 is constructed in the multi-story building 1.

Note that the order in which the connection step S2, the connection step S3, and the filling step S4 are performed is not particularly limited, and for example, the filling step, the connection step, and the connection step may be performed in this order after the installation step S1.

As explained above, according to the drainage structure 11 of this embodiment, when the leg joint 12 swings around the axis O3 with the standpipe part 13 as a starting point, the position and posture of the horizontal pipe part 14 are not stabilized. The above-mentioned rocking motion of the vertical pipe section 13 is easily influenced by the gravity acting on the horizontal pipe section 14. By connecting the horizontal pipe part 14 and the floor slab 6 by the first support part 46, swinging of the leg joint 12 around the axis O3 from the standpipe part 13 as a starting point is efficiently suppressed, and the leg joint A stable drainage gradient can be ensured by the twelve horizontal pipe portions 14.
By supporting the horizontal pipe part 14 with the first support part 46, the degree of freedom when constructing the drainage structure 11 can be increased.

The horizontal pipe section 14 is longer than the vertical pipe section 13. In this case, compared to the case where the horizontal pipe part 14 is shorter than the standpipe part 13, when the leg joint 12 swings around the axis O3 from the standpipe part 13 as a starting point, the distal end of the horizontal pipe part 14 ( (the end where the horizontal pipe connection part 19 is provided) is largely displaced in the vertical direction. Even in this case, since the horizontal pipe part 14 and the floor slab 6 are connected by the first support part 46, the distal end of the horizontal pipe part 14 is suppressed from vertically displacing, and the leg joint 12 can be easily accommodated in the space below the floor slab 6 disposed immediately above the horizontal pipe portion 14 (the leg joint 12 can be accommodated better).
The drainage structure 11 includes a second support portion 51. Therefore, the two support parts, the first support part 46 and the second support part 51, can connect the leg joint 12 to the floor slab 6 more reliably. The strength of the drainage structure 11 against vibration and impact can be improved.

Further, according to the construction method S of the drainage structure of the present embodiment, by filling the space between the standpipe 37 and the floor slab 6 with the filler 7, the standpipe section 13 to which the standpipe 37 is connected swings. This can be more reliably suppressed.

The structure of the drainage structure 11 of this embodiment can be modified in various ways as described below.
As in the drainage structure 11A of the first modification shown in FIG. 5, a so-called two-hung type support section may be used as the first support section 61. The first support portion 61 includes support pieces 62 and 63, a rod 48, and an anchor 49.
The support piece 62 includes a main body 62a and protrusions 62b and 62c. The main body 62a is formed, for example, into a C-shape by a band-like member made of metal. The inner diameter of the main body 62a and the outer diameter of the horizontal tube portion 14 of the leg joint 12 are approximately the same. The protruding portion 62b protrudes outward in the radial direction of the main body 62a from the circumferential first end of the main body 62a. The protruding portion 62c protrudes outward in the radial direction of the main body 62a from the second circumferential end of the main body 62a. A through hole (not shown) penetrating in the vertical direction is formed in each of the protrusions 62b and 62c.

The support piece 63 has the same configuration as the support piece 62. That is, the support piece 63 includes a main body 63a and protrusions 63b, 63c that are configured the same as the main body 62a and the protrusions 62b, 62c.
The support pieces 62 and 63 sandwich the horizontal tube portion 14 of the leg joint 12 in the vertical direction.
A pair of rods 48 are provided on the first support portion 61 . The lower end portions of one of the rods 48 are inserted into the through holes of the protrusions 62b, 63b, respectively, and are fixed to the protrusions 62b, 63b with nuts 54. The lower ends of the other rods 48 are inserted into the through holes of the protrusions 62c, 63c, respectively, and are fixed to the protrusions 62c, 63c with nuts 54.
A pair of anchors 49 are provided on the first support portion 61 . A male thread at the upper end of the rod 48 is fitted into a female thread of each anchor 49, respectively.
The first support portion 61 configured as described above also allows the horizontal pipe portion 14 of the leg joint 12 and the floor slab 6 to be connected.

Like the drainage structure 11B of the second modification shown in FIGS. 6 and 7, instead of the leg joint 12, the vertical pipe 37, the horizontal pipe 39, and the second support part 51 of the drainage structure 11A of the present embodiment, The second support part 66 and the third support part 71 may be provided. In this modification, the standpipe portion 13 is formed with a standpipe connection portion 18A that is a flange.
In this modification, the outer diameter and inner diameter of the horizontal pipe section 14 are larger than the outer diameter and inner diameter of the vertical pipe section 13, respectively. In the bent pipe section 15, the outer diameter and the inner diameter gradually increase from the vertical pipe section 13 side toward the horizontal pipe section 14 side.

The second support portion 66 connects the standpipe portion 13 of the leg joint 12 and the floor slab 6. The second support portion 66 includes support pieces 67 and 68, a rod 53, a nut 54, and an anchor 55.
The support pieces 67 and 68 are configured similarly to the support pieces 62 and 63, and sandwich the standpipe portion 13 of the leg joint 12 in the radial direction of the standpipe portion 13.
A pair of rods 53 are provided on the second support portion 66 . The lower end of each rod 53 is fixed to support pieces 67 and 68. The male thread at the upper end of each rod 53 is fitted into the female thread of each anchor 55, respectively.

In this modification, the lower end of the standpipe 36 is connected to the standpipe connecting portion 18A of the standpipe section 13.
The third support section 71 is a so-called single-hung type support section, and is configured similarly to the first support section 46 . The third support portion 71 connects the horizontal pipe 40 and the floor slab 6.

In the drainage structure 11B configured in this way, the outer diameter and inner diameter of the horizontal pipe portion 14 are larger than the outer diameter and inner diameter of the vertical pipe portion 13, respectively, and the center of gravity of the leg joint 12 is biased toward the horizontal pipe portion 14 side. Therefore, it is difficult to ensure the drainage slope set in the horizontal pipe portion 14. Furthermore, when the axis O1 of the standpipe section 13 is arranged so as to be inclined with respect to the vertical direction (that is, the axis O1 of the standpipe section 13 is not parallel to the pipe axis of the standpipe 36), the leg joint 12 is likely to tilt toward the horizontal pipe portion 14, and furthermore, it is difficult to ensure the drainage slope of the horizontal pipe portion 14.

Like a third modified drainage structure 11C shown in FIGS. 8 and 9, a second support portion 76 may be provided in place of the second support portion 66 of the modified drainage structure 11B. In addition, the boundary between the vertical pipe part 13 and the curved pipe part 15 is shown by a two-dot chain line.
In this modification, the lower end of the standpipe section 13 is disposed within the through hole 6a of the floor slab 6, and the upper end of the standpipe section 13 protrudes above the floor slab 6.
The second support portion 76 connects the standpipe portion 13 of the leg joint 12 and the floor slab 6 above the floor slab 6 . The second support portion 76 includes a support fitting 77, a rod 53, and an anchor 55.
The support fitting 77 can be attached to and detached from the upper end of the standpipe section 13 using a known configuration. The support fittings 77 protrude from the standpipe portion 13 on both sides in the orthogonal direction.
A pair of rods 53 are provided on the second support portion 76 . An intermediate portion of each rod 53 in the vertical direction is fixed to a support fitting 77 .
Anchor 55 is embedded in the upper end of floor slab 6. The female thread formed in the anchor 55 is exposed to the outside of the floor slab 6 from the upper surface of the floor slab 6. The male thread at the lower end of the rod 53 is fitted into the female thread of the anchor 55.

(Second embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. 10 to 12. Parts that are the same as those in the previous embodiment are given the same reference numerals, and their explanation will be omitted, and only the different points will be omitted. explain.
As shown in FIGS. 10 and 11, the drainage structure 81 of the present embodiment includes a pair of lid bodies 85 in addition to each structure of the drainage structure 11B of the second modification of the first embodiment. In addition, in FIG. 11, the upper part of the drainage structure 81, etc. are also shown.
The side wall 15a of the curved pipe portion 15 is formed with an opening 15b that penetrates the side wall 15a in the radial direction. A pair of openings 15b are formed with the central axis of the curved pipe section 15 interposed therebetween.
A flange 82 that protrudes radially outward is attached to the peripheral edge of the opening 15b of the side wall 15a. The flange 82 is arranged around the entire circumference of this peripheral portion. A plurality of bolt holes (not shown) are formed in the flange 82.
In this embodiment, since fire resistance of the horizontal pipe 40 is not required, the horizontal pipe 40 is formed of resin such as polyvinyl chloride.

As shown in FIG. 12, the lid body 85 includes an outer lid (regulating portion) 86, an inner lid 87, and a thermal expansion material 88.
The outer cover 86 includes an outer cover main body 90 formed in a cylindrical shape with a bottom, and a flange 91 provided on the peripheral wall of the outer cover main body 90. The flange 91 protrudes toward the outside of the peripheral wall of the outer lid main body 90 and is provided over the entire circumference of the peripheral wall. A plurality of through holes (not shown) are formed in the flange 91 at positions corresponding to the bolt holes of the bent pipe portion 15.
The outer cover body 90 and flange 91 that constitute the outer cover 86 are integrally formed of metal such as cast iron.

The inner cover 87 includes an inner cover main body 93 formed in a cylindrical shape with a bottom, and a flange 94 provided on the peripheral wall of the inner cover main body 93.
The inner lid main body 93 is formed to have substantially the same size as the outer lid main body 90 of the outer lid 86, and is also formed in a size that can be placed within the flange 82 of the bent pipe portion 15 (see FIG. 11). The bottom wall portion of the inner lid main body 93 is curved in a shape corresponding to the side wall 15a of the curved tube portion 15.
The flange 94 protrudes toward the outside of the peripheral wall of the inner lid main body 93 and is provided over the entire circumference of the peripheral wall. A plurality of through holes (not shown) are formed in the flange 94 at positions corresponding to the bolt holes of the bent pipe section 15.
The inner cover main body 93 and flange 94 that constitute the inner cover 87 are integrally formed of synthetic resin such as polyvinyl chloride.
The inner lid 87 is arranged so that the internal space of the inner lid main body 93 communicates with the internal space of the outer lid main body 90 of the outer lid 86.

The thermally expandable material 88 is made of a rubber material or a resin material containing thermally expandable graphite. The thermal expansion material 88 is made of a material that thermally expands and expands in volume from 5 to 40 times when the temperature reaches 200 degrees or higher, for example. For example, as the thermal expansion material 88, a thermal expansion fireproof material manufactured by CRK Corporation is used.
Thermal expansion material 88 is formed in a cylindrical shape and is disposed between outer cover 86 and inner cover 87. Thermal expansion material 88 is placed in the opening 15b of the curved pipe section 15.
As shown in FIG. 11, the lid body 85 is attached to the bent tube portion 15 by passing bolts 96 through the through holes of the outer lid 86 and the through holes of the inner lid 87 and fitting them into the bolt holes of the bent tube portion 15. installed. The outer cover 86 and the inner cover 87 are attached to the peripheral edge of the opening 15b of the side wall 15a. The lid 85 is removably attached to the peripheral portion. The opening 15b also functions as a cleaning port for cleaning the inside of the curved pipe section 15.

The outer cover 86 covers the outside of the curved tube portion 15 in the radial direction with respect to the thermal expansion material 88 . The outer cover 86 restricts the thermal expansion material 88 from expanding outward in the radial direction of the curved pipe portion 15 .

In the drainage structure 81 of this embodiment configured as described above, when the thermal expansion material 88 is heated due to a fire or the like, the thermal expansion material 88 expands, but the outer cover 86 This outer cover 86 is attached to the peripheral edge of the opening 15b of the side wall 15a. Therefore, the thermal expansion material 88 expands toward the inside in the radial direction, and the internal space of the curved pipe portion 15 can be narrowed. Then, by adjusting the amount of thermal expansion material 88 disposed in the opening 15b, the internal space of the curved pipe portion 15 can be closed.
Note that in the event of a fire, the horizontal pipe 40 disappears.

The distance between the pair of openings 15b is wider than the width of the horizontal pipe part 14, and so that the second support part 66 does not interfere with the opening part 15b, the second support part 66 is a vertical pipe part instead of the bent pipe part 15. It is better to support 13.
Further, the second support portion 66 preferably supports the vertical pipe portion 13 instead of the bent pipe portion 15 so that heat in the event of a fire is quickly transmitted to the opening portion 15b and thermally expands the thermal expansion material 88.
In particular, as shown in FIG. 10, when the leg joint 12 is arranged so that the axis O1 of the standpipe part 13 is inclined with respect to the vertical direction, the center of gravity of the leg joint 12 is Furthermore, since it is biased toward the horizontal pipe 40 side, the presence of the first support portion 46 becomes important.

That is, in the absence of the first support part 46, if the horizontal pipe 40 is destroyed in the event of a fire and the leg joint 12 is tilted, a gap will be created at the connection between the standpipe 36 and the leg joint 12, and the drainage structure 81 will be damaged. Fire resistance may decrease.
On the other hand, by providing the drainage structure 81 with the first support portion 46, fire resistance can be improved.
In the present embodiment, the lid 85 is attached to the bent pipe section 15, but the lid 85 may be attached to the vertical pipe section 13 or the horizontal pipe section 14. The lid body 85 does not need to include the inner lid 87.

Although the first and second embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and configurations within a range that does not depart from the gist of the present invention. This also includes changes, combinations, deletions, etc. Furthermore, it goes without saying that the configurations shown in each embodiment can be used in appropriate combinations.
For example, in the first and second embodiments, the horizontal pipe section 14 may have the same length as the standpipe section 13 or may be shorter than the standpipe section 13.
The drainage structure does not need to include the second support part and the third support part 71.
Although the piping structure is a drainage structure, the piping structure is not limited to this and may be a water supply structure or the like.

1 Multi-story building (building)
6 Floor slab 7 Filling material 11, 11A, 11B, 11C, 81 Drainage structure (piping structure)
12 Leg joint 13 Standing pipe part 14 Horizontal pipe part 15 Bent pipe part 15a Side wall 15b Opening part 36, 37 Standing pipe 39, 40 Horizontal pipe 46, 61 First support part 51, 66, 76 Second support part 86 Outer cover (Regulatory Department)
88 Thermal expansion material S Piping structure construction method S1 Installation process S2 Connection process S3 Connection process S4 Filling process

Claims (3)

A standpipe section with a socket to which the standpipe is connected at the end , and a socket to which the resin horizontal pipe is connected to the end with adhesive , and has a larger outer diameter and inner diameter than the standpipe section. a resin leg joint having a horizontal pipe part and a bent pipe part connecting the vertical pipe part and the horizontal pipe part;
a first support part that has a support fitting that fixes the vicinity of the socket in the horizontal pipe part and connects the horizontal pipe part and the floor slab, which is arranged below the floor slab;
a second support part that has a support piece that comes into contact with the lower end of the socket in the standpipe part and connects the standpipe part and the floor slab;
Equipped with
The horizontal pipe portion is longer than the vertical pipe portion,
An opening that penetrates the side wall in a radial direction is formed in the side wall of the bent pipe portion,
comprising a lid attached to the opening;
The leg joint is a piping structure made of a resin obtained by mixing a polyvinyl chloride polymer with an impact-improving resin, or a resin obtained by graft copolymerizing a polyvinyl chloride polymer and an impact-improving resin. The piping structure according to claim 1, wherein the second support section connects the bent pipe section and the floor slab. A method for constructing a piping structure in which the piping structure according to claim 1 is constructed in a building comprising the floor slab,
an installation step of installing the leg joint below the floor slab;
a connecting step of connecting the horizontal pipe part of the leg joint and the floor slab by the first support part;
a connecting step of connecting the standpipe to the standpipe portion of the leg joint;
a filling step of filling a space between the standpipe connected to the standpipe portion of the leg joint and the floor slab with a filler;
A construction method for piping structures that performs.

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