JP6798844B2 - Fittings and piping structure - Google Patents

Description

The present invention relates to a joint and a piping structure including the joint.

In recent years, in multi-story buildings such as apartment houses, drainage discharged from sanitary equipment on each floor is collected from sanitary equipment on each floor in a drainage vertical pipeline provided in a pipe shaft via a horizontal branch pipe. It is designed to be drained to the sewage channel via curved and horizontal pipelines. In the drainage system for draining the drainage discharged from the sanitary equipment on each floor to the sewer (hereinafter, simply referred to as the drainage system), in order to connect the vertical pipes constituting the drainage vertical pipeline and the lateral branch pipes. A collective joint (joint) having a main pipe to which a main pipe can be connected to each of the upper end and the lower end and a branch pipe connected to a side surface of the main pipe and to which a lateral branch pipe can be connected is used.

For example, in Patent Document 1, a metal collective joint is provided with a closing member below the floor slab (hereinafter, may be simply referred to as a slab) to impart fire resistance, thereby causing inflammation to the upper floors. A piping structure for preventing and using a lateral branch pipe on a slab as a resin pipe is disclosed. By using such a collective joint and a piping structure, it has become possible to use a horizontal branch pipe made of resin.

Further, Patent Document 2 discloses a resin collective joint capable of exhibiting fire resistance by forming a penetrating portion penetrating the inside of a slab of a building into a tapered shape and winding a thermal expansion member.

As described above, in a drainage system using resin pipes and a collective joint, a fluid such as water flowing down in an upper vertical pipe and a fluid flowing down in a lateral branch pipe merge inside the collective joint. The sound of drainage from the pipe tends to be loud. In addition, since resin products are lightweight, drainage noise is likely to occur. Therefore, the resin collective joint is required to have some kind of sound insulation structure.

For example, Patent Document 3 discloses a drainage pipe joint including a joint body for connecting the drainage pipe and a soundproof cover (sound insulation cover) for covering the outer surface of the joint body. The soundproof cover of this drainage pipe joint is mainly composed of a soundproof layer made of porous rubber, and is formed in a three-dimensional shape along the joint body corresponding to the outer shape of the joint body, and the elasticity of the soundproof layer makes it on the outer surface of the joint body. It is in close contact.

Japanese Patent No. 4928408 Japanese Unexamined Patent Publication No. 2014-134098 Japanese Unexamined Patent Publication No. 2016-50444

Generally, in a building, the required fire resistance performance differs depending on the place where the drain pipe penetrates and the scale such as the number of floors, so the thickness of the slab changes for each floor due to the difference in the required fire resistance performance. When the collective joint and the piping structure described in Patent Document 1 are used, it is necessary to construct the cast iron joint so as to penetrate the slab between each layer, but as described above, the collective joint has an integral structure. Therefore, there is a problem that it is necessary to prepare a collective joint according to the thickness of the slab for each slab having a different thickness.
Further, when the collective joint described in Patent Document 1 is used, it is necessary to provide a closing member below the slab so that fire resistance can be exhibited. However, in a drainage system where drainage merges on the lowest floor (hereinafter referred to as the lowest floor merged drainage system), if a horizontal branch pipe for the lowest floor with a short vertical length is directly connected to the leg joint, a blocking member There is a problem that a resin-made lateral branch pipe cannot be used because it cannot be installed. In addition, if a lateral branch pipe with a length secured in the vertical direction is directly connected to the leg joint in order to enable the installation of the closing member, for example, the lateral branch pipe greatly protrudes from the ceiling of the underground space, and the fit is accommodated. It could get worse.

In the resin collective joint described in Patent Document 2, fire resistance is realized because the portion penetrating the slab is formed in a tapered shape so as to shrink in diameter as it advances downward. However, like the collective joint described in Patent Document 1, the collective joint described in Patent Document 2 is not composed of a member whose length can be easily adjusted in the vertical direction, and therefore has a different thickness. There is a problem that it is necessary to prepare a collective joint for each slab according to the thickness of the slab. In addition, if the collective joint described in Patent Document 2 is arranged on the lowest floor of the lowermost confluence drainage system, the fit may be poor.

Further, when the soundproof cover described in Patent Document 3 is used, if the soundproof cover is wound around the joint body and brought into close contact with each other by utilizing the elasticity of the soundproof cover, sound leakage from the gap between the soundproof covers can be prevented. There is a problem that it becomes difficult to provide an air layer between the joint body and the joint body. If an air layer is provided, the function of the soundproof cover (sound insulation performance) may not be fully exhibited.

The present invention has been made in view of the above circumstances, and a joint whose length can be easily changed according to the thickness of a floor slab or the like and which can exhibit high sound insulation performance and a pipe provided with the joint. Provide the structure.

The joint according to the present invention is a resin joint capable of connecting a plurality of resin pipes, and has a joint main body having a main pipe and a branch pipe connected to a side surface of the main pipe, and a main pipe of the joint main body. A straight pipe that is detachably connected to the lower end of the straight pipe and a tapered pipe that is detachably connected to the lower end of the straight pipe and whose diameter is reduced as it goes downward, and the minimum wall thickness of the joint body is the tapered pipe. the thickness than the minimum thickness of the rather, sound insulation cover is provided along the outer surface of at least the joint body and the tapered pipe, the outer surface of the straight pipe is not covered by the sound insulation cover.
Further, the joint according to the present invention is a resin joint capable of connecting a plurality of resin pipes, and is a joint main body having a main pipe and a branch pipe connected to a side surface of the main pipe, and the joint main body. A straight pipe fitted to the lower end of the main pipe and a tapered pipe fitted to the lower end of the straight pipe and shrinking in diameter as it advances downward are provided, and the specific gravity of the resin constituting the joint body is the straight pipe. much larger than the specific gravity of the material constituting the specific gravity or the tapered tube of the resin constituting the sound insulating cover is provided along the outer surface of at least the joint body and the tapered pipe, the outer surface of the straight tube, the sound insulation cover Not covered .

According to the above configuration, the joint body, the straight pipe, and the tapered pipe are detachably provided separately, and the joint body and the tapered pipe are connected by the straight pipe, so that the joint can be joined simply by changing the length of the straight pipe. The length of is easily changed. Further, the minimum wall thickness of the joint body is thicker than the minimum wall thickness of the tapered pipe, or the specific gravity of the resin constituting the joint body is larger than the specific gravity of the resin constituting the straight pipe and the specific weight of the resin constituting the tapered pipe. As a result, the weight of the joint body increases, and the sound insulation performance of the joint body, which tends to increase the drainage noise due to the collection of drainage, is improved, and the sound insulation performance of the joint is improved.

According to the above configuration, the sound insulation performance of the joint is more exhibited. In particular, when applied to a drainage system in a building, the amount of sound insulation cover used can be suppressed by providing a sound insulation cover on the joint body and tapered pipe that are exposed from above or below the floor slab. Moreover, the sound insulation performance of the joint is efficiently exhibited.

The above-mentioned sound insulation cover may be provided at a predetermined distance from the outer surface of the joint body and the tapered pipe.
Further, the joint according to the present invention is a resin joint capable of connecting a plurality of resin pipes, and is a joint main body having a main pipe and a branch pipe connected to a side surface of the main pipe, and the joint main body. A straight pipe detachably connected to the lower end of the main pipe and a tapered pipe detachably connected to the lower end of the straight pipe and shrinking in diameter as it goes downward are provided, and the minimum wall thickness of the joint body is the said. A sound insulation cover is provided at least along the outer surface of the joint body and the taper pipe, which is thicker than the minimum wall thickness of the taper pipe, and the upper end of the sound insulation cover provided along the outer surface of the taper pipe is covered with the taper pipe. An engaging portion that can be engaged is provided at the upper end.
Further, the joint according to the present invention is a resin joint capable of connecting a plurality of resin pipes, and is a joint main body having a main pipe and a branch pipe connected to a side surface of the main pipe, and the joint main body. A straight pipe fitted to the lower end of the main pipe and a tapered pipe fitted to the lower end of the straight pipe and decreasing in diameter as it advances downward are provided, and the specific gravity of the resin constituting the joint body is the straight pipe. A sound insulation cover is provided at least along the outer surface of the joint body and the tapered pipe, and is provided along the outer surface of the tapered pipe, which is larger than the specific gravity of the resin constituting the above or the specific gravity of the material constituting the tapered pipe. An engaging portion that can be engaged with the upper end of the tapered pipe is provided at the upper end of the sound insulation cover.

According to the above configuration, when the sound insulation cover is wound around the joint body and the tapered pipe, an air layer is formed between the inner surface of the sound insulation cover and the outer surface of the joint body and the tapered pipe, so that the sound insulation performance of the joint is improved. It is even higher.
Further, according to the above configuration, since the sound insulating cover provided on the tapered pipe is provided with an engaging portion, the work of winding the sound insulating cover around the tapered pipe is smoothly performed, and the sound insulating cover is peeled off from the tapered pipe. Be prevented.

In the above-mentioned joint, of the joint body, the straight pipe, and the tapered pipe, swivel blades may be provided inside the straight pipe and the tapered pipe.

According to the above configuration, since the swivel blades are provided at least inside the straight pipe and the tapered pipe, the drainage flowing into the joint is rectified well. In addition, since the joint body where the drainage from the upper end and the branch pipe collects is not provided with the swivel blade, noise when the drainage collides with the swivel blade is not generated, and the increase in the drainage noise from the entire joint is suppressed. Be done.

The piping structure according to the present invention includes a plurality of resin joints capable of connecting a plurality of resin pipes , and each of the joints is arranged so as to be inserted into a floor slab on each floor of a building having a plurality of layers. The joint has a joint body having a main pipe and a branch pipe connected to a side surface of the main pipe, and a straight pipe detachably connected to the lower end of the main pipe of the joint body. A tapered pipe that is detachably connected to the lower end of the straight pipe and whose diameter decreases as it advances downward, the minimum wall thickness of the joint body is thicker than the minimum wall thickness of the tapered pipe, and the piping structure is includes a plurality of upright tubes fitted to the lower end of the upper end and tapered pipe of the main pipe of the joint, and a plurality of lateral branch which is fitted to the branch pipes of the joint, at least the straight tube of the joint Is arranged inside the floor slab, and is bent in the horizontal direction from the upstream side at a predetermined position at the lower end of the tapered pipe of the joint inserted into the floor slab on the lowest floor instead of the standing pipe. The straight pipe of the joint into which the leg joint is fitted and inserted into the floor slab on the lowest floor is shorter than the straight pipe of the joint inserted into the floor slab on another floor .
Further, the piping structure according to the present invention includes a plurality of resin joints to which a plurality of resin pipes can be connected, and each of the joints is inserted into a floor slab on each floor of a building having a plurality of layers. In the arranged piping structure, the joint includes a joint body having a main pipe and a branch pipe connected to a side surface of the main pipe, and a straight pipe fitted to the lower end of the main pipe of the joint body. A tapered pipe that is fitted to the lower end of the straight pipe and whose diameter is reduced as it advances downward, and the specific gravity of the resin that constitutes the joint body constitutes the specific gravity of the resin that constitutes the straight pipe or the tapered pipe. The piping structure is larger than the specific gravity of the material to be used, and the piping structure includes a plurality of vertical pipes fitted to the upper end of the main pipe and the lower end of the tapered pipe of the joint, and a plurality of lateral branches fitted to the branch pipe of the joint. A pipe and at least a straight pipe of the joint are arranged inside the floor slab, and the lower end of the tapered pipe of the joint inserted into the floor slab on the lowest floor is on the upstream side instead of the standing pipe. A leg joint bent in the horizontal direction at a predetermined position is fitted, and the straight pipe of the joint inserted into the floor slab on the lowest floor is inserted into the floor slab on another floor. Shorter than a straight pipe of a fitting.

According to the above configuration, the length of the joint can be easily changed by simply changing the length of the straight pipe. Therefore, if the length of the straight pipe is changed according to the thickness of the floor slab, it is common. It is possible to construct a drainage system for buildings with floor slabs of different thicknesses using joint bodies and tapered pipes. In addition, since each joint exhibits sufficiently high sound insulation performance, a drainage system that exhibits high sound insulation performance as a whole is constructed.

According to the above configuration, even if the floor slab on the lowest floor is relatively thin, the straight pipe of the joint inserted into the floor slab on the lowest floor is the joint inserted into the floor slab on another floor. Since it is provided shorter than the straight pipe, the horizontally oriented portion of the leg joint is arranged as close as possible to the bottom surface of the floor slab on the lowest floor, and the leg joint fits well.

According to the joint and piping structure according to the present invention, the length can be easily changed according to the thickness of the slab, and high sound insulation performance is exhibited.

It is a side view of the joint and the piping structure to which this invention is applied. It is a side view of the joint to which this invention is applied. It is a figure of the joint to which this invention was applied, and is the cross-sectional view seen by the arrow YY shown in FIG. Among the sound insulation covers covering the joint to which the present invention is applied, it is a view of the sound insulation cover covering the collective joint of the joint structure, and is the perspective view which shows the expanded state. Among the sound insulation covers covering the joint to which the present invention is applied, it is a view of the sound insulation cover covering the tapered pipe of the joint structure, and is the perspective view which shows the expanded state.

Hereinafter, an embodiment of a joint and piping structure to which the present invention is applied (hereinafter, referred to as the present embodiment) will be described with reference to the drawings. The drawings used in the following description are schematic, and the length, width, thickness ratio, etc. are not always the same as the actual ones and can be changed as appropriate.

As shown in FIG. 1, the piping structure 60 of the present embodiment is used for a drainage system of a building (not shown) having multiple floors such as an apartment. In this drainage system, the drainage flowing down the horizontal branch pipe 7 for flowing down the drainage discharged from the sanitary equipment on each floor constitutes a drainage vertical pipeline in the pipe shaft via the joint structure (joint) 8. However, the drainage that has flowed down the horizontal branch pipe (resin pipe) 7 is collected in a standing pipe (resin pipe) 9 that further flows down to the bottom of the drainage system, and flows down, and the bottom leg joint 62. It is collected in the water and drained to a sewer (not shown) via the horizontal main pipe 63.

The piping structure 60 includes at least a plurality of joint structures 8, a plurality of vertical pipes 9, and a plurality of lateral branch pipes 7.

As shown in FIG. 2, the joint structure 8 is detachably connected to the collective joint (joint body) 1, the straight pipe 5 detachably connected to the lower end 1b of the collective joint 1, and the lower end 5b of the straight pipe 5. It is provided with a tapered tube 6 and the like.

The collective joint 1 has a main pipe 2 extending in the vertical direction and three branch pipes 3 connected to the side surface 2r of the main pipe 2. Of the three branch pipes 3, the axes J3A and J3C of the two branch pipes 3A and 3C are arranged on the same line along the left-right direction (that is, the lateral direction), and are mutually aligned with the axis J2 of the main pipe 2. It is orthogonal. Further, of the three branch pipes 3, the axis J3B of the other branch pipe 3B is orthogonal to each of the axes J2, J3A, and J3C. In the following, the branch pipes 3A, 3B, and 3C will be described as the branch pipe 3 when it is not necessary to distinguish them, and this description will be used for the related components.

The straight pipe 5 is fitted inside the lower part of the main pipe 2 of the collective joint 1.
The tapered pipe 6 is fitted to the outside of the lower part of the straight pipe 5. That is, the collective joint 1 and the tapered pipe 6 are connected by a straight pipe 5.
The diameter of the main pipe 2 of the collective joint 1 is larger than that of the straight pipe 5 in order to improve the drainage performance and the ventilation performance.
Since the tapered pipe 6 is connected to the standing pipe 9, the tapered pipe 6 is formed so as to reduce its diameter as it advances downward.

As shown in FIG. 3, the minimum wall thickness of the collective joint 1 is set to be at least thicker than the minimum wall thickness of the tapered pipe 6. From the viewpoint of further enhancing the sound insulation performance of the collective joint 1 and the joint structure 8, the minimum wall thickness of the collective joint 1 is preferably 1.1 times or more and 3 times or less of the minimum wall thickness of the tapered pipe 6. More preferably, it is more than twice and less than twice. Further, the minimum wall thickness of the collective joint 1 may be set to be thicker than the minimum wall thickness of the straight pipe 5.

The collective joint 1, the straight pipe 5, and the tapered pipe 6 are made of resin, for example, made of vinyl chloride resin. From the viewpoint of further improving the sound insulation performance of the collective joint 1 and the joint structure 8, the specific gravity of the resin constituting the collective joint 1 is 1.1 times or more the specific gravity of the resin constituting the straight pipe 5 and the resin constituting the tapered pipe 6. It is preferably 3 times or less, and more preferably 1.2 times or more and 2 times or less. In order to satisfy the above-mentioned relationship of specific gravity of the resin, for example, an appropriate additive may be added to the resin constituting each of the collective joint 1, the straight pipe 5, and the tapered pipe 6.

Further, of the collective joint 1, the straight pipe 5, and the tapered pipe 6, swivel blades 64 and 65 are provided inside the straight pipe 5 and the tapered pipe 6. The swirl vanes 64 are provided so as to project upward from a part of the inner peripheral end of the inner surface 5n of the straight pipe 5 along the left-right direction to the hollow portion. The swivel blade 65 is provided so as to project upward from a part of the inner peripheral end of the inner surface 6n of the tapered pipe 6 along the left-right direction to the hollow portion. By providing the swivel blades 64 and 65 in this way, the drainage flowing into the straight pipe 5 and the tapered pipe 6 is rectified and flows down while being swirled well in the hollow portion of the straight pipe 5 and the tapered pipe 6.
The shapes of the swirling blades 64 and 65 shown in FIG. 3 are examples, and are not particularly limited as long as the drainage can be swiveled and rectified. The swivel blades 64 and 65 may have, for example, a blade configuration disclosed in Japanese Patent No. 5608419 and drawings, or may have other known configurations.

Although the collective joint 1 may also be provided with swivel blades, since drainage flows into the collective joint 1 from the upper part of the main pipe 2 and a plurality of branch pipes 3, a large amount of drainage collides with the swivel blades. However, the noise generated at that time (that is, drainage noise) tends to be loud. From the viewpoint of surely suppressing the drainage noise from the joint structure 8, it is preferable that the collective joint 1 is not provided with swivel blades.

As shown in FIG. 1, the lower part of the standing pipe 9 (for example, the standing pipe 9A) is fitted to the upper part of the main pipe 2 of the collective joint 1, and another standing pipe 9 (for example, for example) is fitted to the lower part of the tapered pipe 6. The upper part of the standing pipe 9B) is fitted. The inner diameter and outer diameter of the upper end of the tapered pipe 6 are appropriately set in consideration of the outer diameter of the straight pipe 5 and the like. Further, the inner diameter and the outer diameter of the lower end of the tapered pipe 6 are appropriately set in consideration of the outer diameter of the standing pipe 9.
The downstream ends of the lateral branch pipes 7A, 7B, and 7C are fitted to each of the branch pipes 3A, 3B, and 3C of the collective joint 1.

The joint structure 8 is inserted through a through hole H formed in a concrete floor slab S interposed between adjacent layers F in the vertical direction. A mortar M is filled between the side wall of the through hole H and the joint structure 8. In particular, the collective joint 1 below the lower end of the branch pipe 3, the sound insulation cover 10, the straight pipe 5, the taper pipe 6 and the upper portion of the sound insulation cover 20 are arranged in a state of being embedded in the mortar M.

The drainage system provided with the piping structure 60 is a so-called bottom floor combined drainage system. A leg joint 62 bent in the horizontal direction at a predetermined position from the upstream side is fitted to the lower end 6b of the tapered pipe 6 of the joint structure 8 inserted into the floor slab SB on the lowest floor of the building. There is. In the present embodiment, the horizontal main pipe 63 is fitted to the downstream end of the leg joint 62. The downstream end (not shown) of the horizontal main pipe 63 is connected to a sewer (not shown).

If the thickness t of the floor slab SB on the lowest floor is equal to or thinner than the thickness t of the floor slab S on the other floor, it is inserted into the floor slab SB on the lowest floor. The straight pipe 5 of the joint structure 8 is shorter than the straight pipe 5 of the joint structure 8 inserted into the floor slab S on another floor.

The vertical pipe 9, the horizontal branch pipe 7, the leg joint 62, and the horizontal main pipe 63 connected to the joint structure 8 are made of resin, and are made of, for example, vinyl chloride resin.

From the viewpoint of further enhancing the sound insulation performance of the joint structure 8, the sound insulation cover 10 is provided along the outer surface 2p of the main pipe 2 of the collective joint 1, the outer surface 3p of the branch pipe 3, and the outer surface 6p of the tapered pipe 6. Specifically, the sound insulation cover 10 is composed of a sound insulation cover 10A that covers the outer surface 2p of the main pipe 2 of the collective joint 1 and the outer surface 3p of the branch pipe 3, and a sound insulation cover 20 that covers the outer surface 6p of the taper pipe 6. ..

The sound insulation cover 10A is three-dimensionally formed along the outer surfaces 2p and 3p so as to cover the outer surfaces 2p and 3p of the main pipe 2 and the branch pipe 3 at predetermined intervals.
As shown in FIG. 4, the sound insulation cover 10A is a so-called single sheet-like material formed three-dimensionally as described above, and the main pipe 2 is arranged so as to face the main pipe 2. The main pipe cover portion 12 that covers the branch pipe 3 and the branch pipe cover portion 13 that covers the branch pipe 3 by being arranged to face the branch pipe 3 are integrally provided in series.

In the sound insulation cover 10A, both ends in the circumferential direction of the main pipe 2 (that is, the left direction and the right direction shown in FIG. 5) are connecting portions 15. When covering the collective joint 1 with the sound insulation cover 10A, the connection portions 15 are overlapped with each other in the thickness direction of the sound insulation cover 10A and adhered to each other, or the connection portions are adjacent to each other along the circumferential direction of the main pipe 2 and some kind of adhesion is made. It can be bonded with a material or fusion.

The sound insulation cover 10A is made of a flexible material. As such a material, for example, soft vinyl chloride resin (VC), butyl rubber, polystyrene and the like are suitable. From the viewpoint of further enhancing the sound insulation performance of the joint 18 with a sound insulation cover that covers the collective joint 1 with the sound insulation cover 10A, polyethylene terephthalate (polyethylene terephthalate) is used as a sound insulation layer using a synthetic resin such as soft VC as a sound insulation layer. A sound absorbing layer made of PET) felt, urethane foam, polyethylene foam (PE), glass wool, rock wool or the like may be provided.

Further, from the viewpoint of effectively utilizing the flexibility of the sound insulation cover 10A and achieving a predetermined strength, the thickness of the sound insulation cover 10A is preferably 0.8 mm or more and 5 mm or less. When the sound absorbing layer is provided inside or outside the above-mentioned sound insulating layer made of resin, the thickness of the sound insulating layer is preferably 0.8 mm or more and 2 mm or less, and the thickness of the sound absorbing layer is preferably 5 mm or more and 10 mm or less.
The method for molding the material of the above-mentioned flexible sound insulation cover 10A in a three-dimensional shape is not particularly limited, and examples thereof include a press molding method, a vacuum forming method, and a pneumatic molding method.

The sound insulation cover 20 shown in FIG. 5 is made of the same material as the sound insulation cover 10A, and is arranged at a predetermined distance from the outer surface 6p of the taper pipe 6. Since the noise from the tapered pipe 6 is considered to be smaller than the noise from the collective joint 1 in which drainage is collected from the standing pipe 9 and the plurality of branch pipes 3, the sound insulation cover 20 may have a known sound insulation structure. , May be in close contact with the outer surface 6p of the tapered pipe 6.

As shown in FIG. 5, the upper end 20a of the sound insulation cover 20 is provided with an engaging portion 26 that can be engaged with the upper end 6a of the tapered pipe 6 in a state of being wound around the tapered pipe 6. The engaging portion 26 is capable of engaging with the tapered pipe 6 so as to overlap the upper end 6a of the tapered pipe 6 from above and be hooked on the upper end 6a. That is, the engaging portion 26 is provided substantially perpendicular to the side surface cover portion 23 that is wound from the upper end 20a of the sound insulation cover 20 along the side surface in the left-right direction of the outer surface 6p of the tapered pipe 6.

Similar to the sound insulation cover 10A described above, in the sound insulation cover 20, both ends of the taper pipe 6 in the circumferential direction are connecting portions 25. When the taper pipe 6 is covered with the sound insulation cover 20, the connection portions 25 can be adhered to each other by the same method as the method of connecting the connection portions 15 of the sound insulation cover 10A described above.

From the viewpoint of further enhancing the sound insulation performance of the joint 18 with the sound insulation cover, the upper end 20a of the sound insulation cover 20 may be connected to the lower end of the main cover portion 12 in the sound insulation cover 10A, that is, the lower end 10b of the sound insulation cover 10A. That is, the vertical dimension of the sound insulation cover 20 may be extended, and the straight pipe 5 may be covered in addition to the taper pipe 6 by the sound insulation cover 20. As a result, the entire joint structure 8 is covered with the sound insulation cover 10, and the sound insulation performance is improved. However, when the straight pipe 5 is completely buried inside the mortar M as described above, there is no exposed portion on each floor of the building, so that the straight pipe 5 has a sound insulation cover as shown in FIG. 10 may not be covered.

According to the joint structure 8 of the present embodiment described above, the collective joint 1, the straight pipe 5, and the tapered pipe 6 are detachably provided separately, and the collective joint 1, the tapered pipe 6 are connected by the straight pipe 5. Therefore, the length of the joint structure 8 can be easily changed only by changing the length of the straight pipe 5. Further, the minimum wall thickness of the collective joint 1 is thicker than the minimum wall thickness of the tapered pipe 6, or the specific gravity of the resin constituting the collective joint 1 is the specific gravity of the resin constituting the straight pipe 5 or the resin constituting the tapered pipe 6. By making it larger than the specific gravity of, the weight of the collective joint 1 can be increased, the sound insulation performance of the collective joint 1 can be enhanced, and as a result, the sound insulation performance of the joint structure 8 can be enhanced.
Therefore, according to the joint structure 8 of the present embodiment, the length of the joint structure 8 can be easily changed according to the structure and dimensions of the installation target such as the thickness of the floor slab S of the building, and the joint structure The high sound insulation performance of 8 can be exhibited.

Further, in the joint structure 8 of the present embodiment, the sound insulation cover 10 is provided at least along the outer surface 2p of the main pipe 2 of the collective joint 1, the outer surface 3p of the branch pipe 3, and the outer surface 6p of the tapered pipe 6. The sound insulation performance of the joint structure 8 can be further improved. When the joint structure 8 is applied to a drainage system of a building as in the present embodiment, a sound insulation cover 10A is provided on the collective joint 1 exposed from above or below the floor slab S, and a sound insulation cover is provided on the tapered pipe 6. By providing 20, the amount of the sound insulation cover 10 used, that is, the material cost of the resin constituting the sound insulation cover can be suppressed, and the sound insulation performance of the joint structure 8 can be efficiently exhibited.
Further, since the sound insulation cover 10 is provided at a predetermined distance from the outer surface 2p of the main pipe 2, the outer surface 3p of the branch pipe 3, and the outer surface 6p of the tapered pipe 6, the sound insulation cover 10 is wound when the sound insulation cover 10 is wound. An air layer can be formed between the inner surface of the cover 10 and the outer surface of the joint body and the tapered pipe, and the sound insulation performance of the joint structure 8 can be further improved.
Further, since the engaging portion 26 is provided at the upper end 20a provided along the outer surface 6p of the taper pipe 6 in the sound insulation cover 20, the work of winding the sound insulation cover 20 around the taper pipe 6 can be smoothly performed. It is possible to prevent the sound insulation cover 20 from peeling off from the taper pipe 6.

Further, in the joint structure 8 of the present embodiment, the swivel blade is not provided inside the collective joint 1, the swivel blade 64 is provided inside the straight pipe 5, and the swivel blade 65 is provided inside the tapered pipe 6. Therefore, the drainage noise from the collective joint 1 is suppressed, the increase in the drainage noise from the joint structure 8 is suppressed, and the drainage flowing into the joint structure 8 is swiveled inside the straight pipe 5 and the tapered pipe 6. , Can be rectified well.

Further, according to the piping structure 60 of the present embodiment, the thickness t is different only by using the collective joint 1 and the tapered pipe 6 formed in a common shape and changing the length of the straight pipe 5 of the joint structure 8. A joint structure 8 having an appropriate length can be arranged and constructed according to each of the floor slabs S. For example, as shown in FIG. 1, a joint structure 8 having a long straight pipe 5 is arranged on a floor slab S having a relatively large thickness t, and a short straight pipe 5 is provided on a floor slab SB having a relatively small thickness t. The provided joint structure 8 may be arranged. At the construction site, a straight pipe 5 having an appropriate length can be cut out from a long pipe member according to the thickness t of the floor slab S to form a joint structure 8.
Therefore, it is not necessary to individually prepare the joint structure 8 for the floor slabs S having different thicknesses t, the amount of the resin constituting the joint structure 8 can be suppressed, and the resin loss can be reduced. Further, since each joint structure 8 exhibits sufficiently high sound insulation performance, it is possible to enhance the sound insulation performance of the pipe structure 60 and the drainage system provided with the pipe structure 60.

Further, in the piping structure 60 of the present embodiment, the leg joint 62 and the horizontal main pipe 63 are fitted to the lower end 6b of the tapered pipe 6 of the joint structure 8 inserted into the relatively thin floor slab SB on the lowermost floor. The straight pipe 5 of the joint structure 8 inserted through the floor slab SB on the lowest floor is set shorter than the straight pipe 5 of the joint structure 8 inserted through the floor slab SB on the other floor. According to such a configuration, the horizontally oriented portion of the leg joint 62 and the horizontal main pipe 63 can be arranged as close as possible to the bottom surface of the floor slab SB on the lowest floor, and the leg joint can be fitted well. .. As a result, even when the lower part of the floor slab SB on the lowest floor is utilized as the underground space, it is possible to secure a larger height of the underground space.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the specific embodiments, and various aspects of the present invention are described within the scope of the claims. It can be transformed and changed.

For example, in each of the above-described embodiments, an collective joint 1 having three branch pipes 3 on the side surface 2r of the main pipe 2 has been exemplified. When the above-mentioned sound insulation cover 10 is applied to a joint in which three or more branch pipes 3 are connected to the side surface 2r of the main pipe 2, the shape of the joint becomes complicated. Therefore, when covering the joint with a conventional sound insulation cover, The effect of the sound insulation cover 10 is enhanced as compared with the above, but it goes without saying that the number of branch pipes 3 may be two, for example.
Further, even in a joint in which three branch pipes 3 are connected to the side surface 2r of the main pipe 2, the arrangement of the branch pipes 3 is not limited to the arrangement illustrated in FIG. For example, the respective axes of the branch pipe 3 may be arranged on the same virtual plane orthogonal to the main pipe 2, and may be located on the same virtual plane at equal angles to each other.

1 ... Collective joint (joint body)
2 ... Main pipe 2r ... Side surfaces 3, 3A, 3B, 3C ... Branch pipe 3j ... Base end 7 ... Leg joint (resin pipe)
8 ... Joint structure (joint)
9 ... Standing pipe (resin pipe)
10, 10A ... Sound insulation cover 10a ... Upper end 10b ... Lower end 12 ... Main cover 13 ... Branch pipe cover 20 ... Sound insulation cover 26 ... Engagement 31 ... First cover 32 ... Second cover 60 ... Piping system 62 … Leg joint (resin pipe)
64, 65 ... Swivel blade

Claims (6)

A resin fitting that can connect multiple resin pipes.
A joint body having a main pipe and a branch pipe connected to the side surface of the main pipe,
A straight pipe that is detachably connected to the lower end of the main pipe of the joint body,
A tapered pipe that is detachably connected to the lower end of the straight pipe and whose diameter decreases as it goes downward is provided.
The minimum wall thickness of the fitting body is rather thick than the minimum thickness of the tapered tube,
A sound insulation cover is provided at least along the outer surface of the joint body and the tapered pipe.
The outer surface of the straight pipe is a joint that is not covered by a sound insulation cover . A resin fitting that can connect multiple resin pipes.
A joint body having a main pipe and a branch pipe connected to the side surface of the main pipe,
A straight pipe fitted to the lower end of the main pipe of the joint body and
A tapered pipe that is fitted to the lower end of the straight pipe and whose diameter decreases as it goes downward is provided.
The specific gravity of the resin constituting the joint body the much larger than the specific gravity of the material constituting the specific gravity or the tapered tube of the resin constituting the straight tube,
A sound insulation cover is provided at least along the outer surface of the joint body and the tapered pipe.
The outer surface of the straight pipe is a joint that is not covered by a sound insulation cover . A resin fitting that can connect multiple resin pipes.
A joint body having a main pipe and a branch pipe connected to the side surface of the main pipe,
A straight pipe that is detachably connected to the lower end of the main pipe of the joint body,
A tapered pipe that is detachably connected to the lower end of the straight pipe and whose diameter decreases as it goes downward is provided.
The minimum wall thickness of the fitting body is rather thick than the minimum thickness of the tapered tube,
A sound insulation cover is provided at least along the outer surface of the joint body and the tapered pipe.
A joint in which an engaging portion that can be engaged with the upper end of the tapered pipe is provided at the upper end of a sound insulation cover provided along the outer surface of the tapered pipe . A resin fitting that can connect multiple resin pipes.
A joint body having a main pipe and a branch pipe connected to the side surface of the main pipe,
A straight pipe fitted to the lower end of the main pipe of the joint body and
A tapered pipe that is fitted to the lower end of the straight pipe and whose diameter decreases as it goes downward is provided.
The specific gravity of the resin constituting the joint body the much larger than the specific gravity of the material constituting the specific gravity or the tapered tube of the resin constituting the straight tube,
A sound insulation cover is provided at least along the outer surface of the joint body and the tapered pipe.
A joint in which an engaging portion that can be engaged with the upper end of the tapered pipe is provided at the upper end of a sound insulation cover provided along the outer surface of the tapered pipe . A piping structure having a plurality of resin joints to which a plurality of resin pipes can be connected , and each of the joints is arranged so as to be inserted into a floor slab of a building having a plurality of floors.
The joint
A joint body having a main pipe and a branch pipe connected to the side surface of the main pipe,
A straight pipe that is detachably connected to the lower end of the main pipe of the joint body,
A tapered pipe that is detachably connected to the lower end of the straight pipe and whose diameter decreases as it goes downward is provided.
The minimum wall thickness of the joint body is thicker than the minimum wall thickness of the tapered pipe.
The piping structure is
A plurality of standing pipes fitted to the upper end of the main pipe and the lower end of the tapered pipe of the joint,
A plurality of lateral branch pipes fitted to the branch pipes of the joint.
At least the straight pipe of the joint is arranged inside the floor slab .
A leg joint bent in the horizontal direction from the upstream side at a predetermined position is fitted to the lower end of the tapered pipe of the joint inserted into the floor slab on the lowest floor instead of the standing pipe.
The straight pipe of the joint inserted through the floor slab on the lowest floor has a shorter piping structure than the straight pipe of the joint inserted through the floor slab on another floor . A piping structure having a plurality of resin joints to which a plurality of resin pipes can be connected , and each of the joints is arranged so as to be inserted into a floor slab of a building having a plurality of floors.
The joint
A joint body having a main pipe and a branch pipe connected to the side surface of the main pipe,
A straight pipe fitted to the lower end of the main pipe of the joint body and
A tapered pipe that is fitted to the lower end of the straight pipe and whose diameter is reduced as it goes downward is provided.
The specific gravity of the resin constituting the joint body is larger than the specific gravity of the resin constituting the straight pipe or the specific gravity of the material constituting the tapered pipe.
The piping structure is
A plurality of standing pipes fitted to the upper end of the main pipe and the lower end of the tapered pipe of the joint,
A plurality of lateral branch pipes fitted to the branch pipes of the joint.
At least the straight pipe of the joint is arranged inside the floor slab .
A leg joint bent in the horizontal direction from the upstream side at a predetermined position is fitted to the lower end of the tapered pipe of the joint inserted into the floor slab on the lowest floor instead of the standing pipe.
The straight pipe of the joint inserted through the floor slab on the lowest floor has a shorter piping structure than the straight pipe of the joint inserted through the floor slab on another floor .

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