Sound isolation structure of collective joint, collective joint, sound isolation cover, and method for constructing sound isolation structure

Abstract

To provide a sound isolation structure of a collective joint, and a construction method thereof.SOLUTION: In a sound isolation structure of a collective joint according to the present invention, the collective joint has a vertical pipe connection part connectable to a vertical pipe and a horizontal pipe connection part protruding from the side surface of the vertical pipe connection part and connectable to a horizontal pipe, and is provided so as to vertically penetrate a slab of a building; a wall is provided to conceal the collective joint and the vertical pipe from the inside of the building; an inspection port is provided in the wall near the vertical pipe. The sound isolation structure is configured such that around the collective joint near the inspection port, a sound isolation cover is provided which is composed of a vertical, cylindrical sound isolation member made of a sound isolation sheet, and which comprises a plurality of vertical slits provided in a circumferential direction of the sound isolation member and extending vertically from the bottom side of the lower end of the sound isolation member on the bottom part side of the sound isolation member.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a sound-insulating structure for a mass joint, a sound-insulating cover for the mass joint, and a method for constructing the sound-insulating structure. [Background technology]

[0002] Apartment buildings and hotels generally use a single-pipe drainage system. A multi-way branch joint is installed in the pipe shaft (PS) in the rooms on each floor, and horizontal drainage pipes from each drainage fixture are connected to it. The collective joint is buried in the slab and piped. Above the slab (above floor), it has multiple opening branches so that it can be connected to horizontal drainage pipes from multiple directions, and it has a connection structure above and below the slab so that it can be connected to vertical pipes. Traditionally, cast iron joints were the norm, but in recent years, plastic joints have become more popular due to their ease of installation and durability. As this type of collective joint, a piping structure using a resin collective joint, as described in Patent Document 1 below, has been known. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7401964 Summary of the Invention [Problem to be solved by the invention]

[0004] Demand for quietness is increasing in condominiums, and there are an increasing number of cases where soundproofing measures are required to prevent drainage noise from drainage pipes. However, the manifold joint is equipped with a swirl vane, which suppresses fluctuations in air pressure inside the drainage standpipe and ensures drainage performance.However, the installation of the swirl vane caused an increase in the drainage noise from the manifold joint. For this reason, in condominiums and other properties where high levels of quietness are required, drainage pipes are sometimes wrapped in glass wool and soundproofing sheets to improve sound insulation.In addition, each company sometimes wraps its own soundproofing covers around the pipes.

[0005] The above-mentioned single-pipe resin drainage system has the following problems. Depending on the construction and soundproofing conditions of the gypsum board that forms the wall covering the pipe shaft, drainage noise may leak out. In particular, sound leakage is likely to occur when the collective joint is not wrapped with a sound-insulating cover. If a problem with drainage noise is discovered upon completion, it will be necessary to install a soundproofing cover after construction to reduce the noise, which will require large-scale construction work that will involve destroying a large section of the wall covering the pipe shaft. When installing the soundproofing cover from an inspection hatch in the wall covering the pipe shaft, workers had to wrap the soundproofing sheet by hand, which made it particularly difficult to eliminate noise near the side branches.

[0006] In view of the above-mentioned circumstances, the present invention aims to provide a sound-insulating structure for a manifold joint, a manifold joint, a sound-insulating cover, and a method for constructing a sound-insulating structure that are suitable for reducing drainage noise with simple construction after completion. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention proposes the following aspects. "1" The soundproofing structure of a manifold in this form is a manifold having a vertical pipe connection part connectable to a vertical pipe and a horizontal pipe connection part protruding from the side of the vertical pipe connection part and connectable to a horizontal pipe, the manifold being arranged to penetrate vertically through the slab of a building, a wall being provided to conceal the manifold and the vertical pipe from the inside of the room, and an inspection hatch being provided in the wall near the vertical pipe, and is characterized in that a soundproofing structure for a manifold is arranged such that a vertical cylindrical soundproofing member provided with a soundproofing sheet is provided around the manifold near the inspection hatch, and a soundproofing cover is provided on the bottom side of the soundproofing member with a plurality of vertical slits extending vertically from the lower end of the soundproofing member in the circumferential direction of the soundproofing member.

[0008] According to this embodiment, a structure can be realized in which the collective joint located on the back side of the wall is covered with a sound-insulating material, thereby suppressing noise when wastewater passes through the inside of the collective joint. The sound-proofing material can be attached around the vertical pipe through an inspection hatch in the wall, and the vertical slits can be moved downward to reach the horizontal pipe, so the sound-proofing cover can be installed even after construction has been completed and the wall with the inspection hatch has been built.This means that noise control measures can be taken around the manifold joint with a simple retrofitting process, without having to perform large-scale construction such as demolishing the wall and installing new sound-proofing material after construction.

[0009] [2] In the sound-insulating structure according to this embodiment, the horizontal pipe may be inserted into a slit gap formed by widening the spacing between the vertical slits, and the sound-insulating cover may cover the periphery of the collective joint.

[0010] The sound-insulating cover is attached around the vertical pipe through an inspection hatch in the wall, then moved downward until the vertical slits reach the horizontal pipe, and then pushed down again, sandwiching the horizontal pipe between the vertical slits. This means that the sound-insulating cover can be attached even after the wall with the inspection hatch has been constructed.

[0011] "3" In the sound-insulating structure according to this embodiment, a configuration can be adopted in which the upper side of the sound-insulating member is provided with a plurality of auxiliary slits extending vertically from the upper edge of the sound-insulating member in the circumferential direction of the sound-insulating member, and the upper end opening of the sound-insulating member is tightly attached to the outer circumferential surface of the vertical pipe by a fastening member wrapped around the outer periphery of the portion where the auxiliary slits are formed.

[0012] By providing multiple auxiliary slits on the upper side and tying the area around these auxiliary slits with a fastening member to tightly seal the upper end of the sound-insulating cover against the vertical pipe, a structure with improved sound insulation can be achieved.

[0013] [4] In the sound insulation structure according to this embodiment, the sound insulation member may be configured to include the sound insulation sheet and a sound absorbing material lined within the sound insulation sheet.

[0014] By providing sound-absorbing material on the inner surface of the sound-insulating sheet, the sound-insulating cover can have improved sound-insulating performance, and sufficient noise control measures can be implemented with a simple retrofitting process after construction.

[0015] "5" In the sound-insulating structure according to this embodiment, a configuration can be adopted in which the inner diameter of the upper end opening of the sound-insulating member is smaller than the inner diameter of the lower end opening of the sound-insulating member, the upper end opening is sized to cover the circumferential surface of the vertical pipe, and the lower end opening is sized to cover the circumferential surface of the manifold.

[0016] The upper end opening of the sound-insulating member can cover the circumferential surface of the vertical pipe to improve sound insulation. The lower end opening of the sound-insulating member can cover the peripheral surface of the collective joint, thereby improving sound insulation.

[0017] "6" In the sound-insulating structure according to this embodiment, the sound-insulating member may be configured to include an upper sound-insulating member that covers the lower end of the vertical pipe and the connecting portion of the vertical pipe, and a lower sound-insulating member that is integrated with the upper sound-insulating member and has a plurality of vertical slits in the circumferential direction.

[0018] By providing the sound-absorbing member with an upper sound-insulating member and a lower sound-insulating member, the upper sound-insulating member can have a configuration that is desirable for attachment to the vertical pipe, and the lower sound-insulating member can have a configuration that is desirable for attachment to the vertical pipe connection portion.

[0019] [7] The manifold of this embodiment is a manifold having a vertical pipe connection portion connectable to a vertical pipe and a horizontal pipe connection portion protruding from the side of the vertical pipe connection portion and connectable to a horizontal pipe, and can adopt a configuration in which the manifold is made up of a vertical cylindrical sound-insulating member provided with a sound-insulating sheet around the horizontal pipe connection portion, and a sound-insulating cover is provided on the bottom side of the sound-insulating member with a plurality of vertical slits extending vertically from the lower end of the sound-insulating member in the circumferential direction of the sound-insulating member.

[0020] According to this embodiment, a structure can be realized in which the collective joint is covered with a sound-insulating member, so that noise generated when wastewater passes through the inside of the collective joint can be suppressed. When a construction is adopted in which the manifold joint is located behind the wall, the soundproofing material can be attached around the vertical pipe through an inspection hatch in the wall, and the soundproofing material can be moved downward so that the vertical slits reach the horizontal pipe, so the soundproofing cover can be installed even after construction has been completed and the wall with the inspection hatch has been built.This means that noise control measures around the manifold joint can be implemented with a simple retrofitting process, without requiring large-scale construction such as demolishing the wall and installing new soundproofing material after construction.

[0021] [8] In the collective joint according to this embodiment, a configuration can be adopted in which the sound-insulating cover is attached around the horizontal pipe connecting portion by inserting the horizontal pipe connecting portion into a slit gap formed by widening the spacing between the vertical slits.

[0022] The sound-insulating cover attached to the horizontal pipe connection is moved downward until the vertical slits reach the horizontal pipe, and then the sound-insulating cover is pushed down, so that the horizontal pipe is sandwiched between the vertical slits and attached. This means that the sound-insulating cover can be installed even after construction of a wall with an inspection hatch has been completed.

[0023] [9] In the collective joint according to this embodiment, a configuration can be adopted in which the upper side of the sound-insulating member is provided with a plurality of auxiliary slits extending vertically from the upper peripheral edge of the sound-insulating member in the circumferential direction of the sound-insulating member.

[0024] By binding the area around the auxiliary slit with a fastening member and tightly fitting the upper end of the sound-insulating cover to the vertical pipe, a structure with improved sound insulation can be achieved.

[0025]

[10] In the collective joint according to this embodiment, the sound-insulating member may be configured to include the sound-insulating sheet and a sound-absorbing material lined within the sound-insulating sheet.

[0026] By providing sound-absorbing material on the inner surface of the sound-insulating sheet, the sound-insulating cover can have improved sound-insulating performance, and sufficient noise control measures can be implemented with a simple retrofitting process after construction.

[0027]

[11] In the collective joint according to this embodiment, the sound-insulating member may be configured to include an upper sound-insulating member that covers the lower end of the vertical pipe and the connection portion of the vertical pipe, and a lower sound-insulating member that is integrated with the upper sound-insulating member and has a plurality of vertical slits in the circumferential direction.

[0028] The upper end opening of the sound-insulating member can cover the circumferential surface of the vertical pipe to improve sound insulation. The lower end opening of the sound-insulating member can cover the peripheral surface of the collective joint, thereby improving sound insulation.

[0029] "12" The sound-insulating cover of this embodiment is composed of a vertical cylindrical sound-insulating member provided with a sound-insulating sheet, and is attached to a manifold joint having a vertical pipe connection portion for connecting vertical pipes and a horizontal pipe connection portion for connecting horizontal pipes, and is characterized in that the opening at the lower end of the sound-insulating member has a plurality of vertical slits at predetermined intervals around the circumferential direction of the opening, and the vertical slits are longer than the outer diameter of the horizontal pipes.

[0030] By providing the sound-insulating member with an upper sound-insulating member and a lower sound-insulating member, the upper sound-insulating member can adopt a configuration that is desirable for attachment to the vertical pipe, and the lower sound-insulating member can adopt a configuration that is desirable for attachment to the vertical pipe connection portion.

[0031]

[13] In the sound-insulating cover according to this embodiment, a configuration can be adopted in which the opening at the upper end of the sound-insulating member has a plurality of auxiliary slits at predetermined intervals in the circumferential direction of the opening.

[0032] According to the sound-insulating cover of this embodiment, a structure in which the collective joint is covered with a sound-insulating material can be realized, so that noise generated when wastewater passes through the inside of the collective joint can be suppressed. When a construction is adopted in which the manifold joint is located behind the wall, the soundproofing material can be attached around the vertical pipe through an inspection hatch in the wall, and the soundproofing material can be moved downward so that the vertical slits reach the horizontal pipe, so the soundproofing cover can be installed even after construction has been completed and the wall with the inspection hatch has been built.This means that noise control measures around the manifold joint can be implemented with a simple retrofitting process, without requiring large-scale construction such as demolishing the wall and installing new soundproofing material after construction.

[0033]

[14] In the sound-insulating cover according to this embodiment, a structure in which a sound-absorbing material is provided on the inner side of the sound-insulating sheet can be adopted.

[0034] By providing sound-absorbing material on the inner surface of the sound-insulating sheet, the sound-insulating cover can have improved sound-insulating performance, and sufficient noise control measures can be implemented with a simple retrofitting process after construction.

[0035]

[15] In the sound-insulating cover according to this embodiment, the sound-insulating member may be configured to include an upper sound-insulating member that covers the lower end of the vertical pipe and the connecting portion of the vertical pipe, and a lower sound-insulating member that is integrated with the upper sound-insulating member and has a plurality of vertical slits in the circumferential direction.

[0036] By providing the sound-insulating member with an upper sound-insulating member and a lower sound-insulating member, the upper sound-insulating member can adopt a configuration that is desirable for attachment to the vertical pipe, and the lower sound-insulating member can adopt a configuration that is desirable for attachment to the vertical pipe connection portion.

[0037] "16" The method for constructing a soundproofing structure for a manifold joint according to this embodiment is a method for constructing a soundproofing structure in which a manifold joint having a vertical pipe connection portion connectable to a vertical pipe and a horizontal pipe connection portion protruding from the side of the vertical pipe connection portion and connectable to a horizontal pipe is provided so as to penetrate vertically through the slab of a building, a wall is provided to cover the manifold joint and the vertical pipe, and an inspection hatch is provided in the wall near the vertical pipe, and a soundproofing cover is attached to the manifold joint, and the method is characterized in that a soundproofing member is formed by forming a soundproofing sheet having a plurality of slits in an array into a vertical tube around the vertical pipe near the inspection hatch so that the slits are positioned on the lower side to form vertical slits, and the soundproofing member is moved downward from near the inspection hatch to widen the gap of the vertical slit formed along the lower end opening of the soundproofing member, and the horizontal pipe is inserted into the gap of the vertical slit to form the soundproofing structure.

[0038] According to this embodiment, a structure can be realized in which the collective joint located on the back side of the wall is covered with a sound-insulating material, thereby suppressing noise when wastewater passes through the inside of the collective joint. The sound-proofing material can be attached around the vertical pipe through an inspection hatch in the wall, and the vertical slits can be moved downward to reach the horizontal pipe, so the sound-proofing cover can be installed even after construction has been completed and the wall with the inspection hatch has been built.This means that noise control measures can be taken around the manifold joint with a simple retrofitting process, without having to perform large-scale construction such as demolishing the wall and installing new sound-proofing material after construction. [Effects of the Invention]

[0039] According to the soundproofing structure of this embodiment, a manifold located on the back side of a wall can be covered with a soundproofing material, thereby suppressing noise when wastewater passes through the manifold. The soundproofing material can be attached around the vertical pipe through an inspection hatch provided in the wall, and the soundproofing material can be moved downward so that the vertical slit reaches the horizontal pipe connection part or the horizontal pipe. Therefore, the soundproofing material can be attached even after the wall with the inspection hatch has been constructed. Therefore, noise control measures for the collective joint can be implemented through simple retrofitting work, without having to carry out large-scale construction work such as demolishing part of the wall and installing new soundproofing material after construction. [Brief explanation of the drawings]

[0040] [Figure 1] 1 is a cross-sectional view showing the configuration of a slab and a mass joint of a building to which a sound-insulating structure of a mass joint according to a first embodiment of the present invention is applied. [Figure 2] FIG. 10 is a development view of a sound-insulating cover used for attaching to the same collective joint. [Figure 3] FIG. 2 is a side view illustrating the procedure for attaching a sound-insulating cover to the manifold shown in FIG. 1 through an inspection hatch and the attached state. [Figure 4] 10 is a view showing a developed state of a sound-insulating cover that is applied to a sound-insulating structure for a pipe joint according to a second embodiment of the present invention. FIG. [Figure 5] 5 is a perspective view showing a state in which the sound-insulating cover shown in FIG. 4 is deformed. FIG. [Figure 6] FIG. 10 is a side view illustrating the procedure for attaching the sound-insulating cover through the inspection hatch and the attached state of the sound-insulating structure according to the second embodiment. [Figure 7] FIG. 10 is a development view of the upper side of a sound-insulating cover that is applied to a sound-insulating structure for a collective joint according to a third embodiment of the present invention. [Figure 8] FIG. 10 is a development view of the lower side of a sound-insulating cover that is applied to a sound-insulating structure for a collective joint according to a third embodiment of the present invention. [Figure 9] FIG. 11 is a side view illustrating the procedure for attaching the sound-insulating cover through the inspection hatch and the attached state in the sound-insulating structure according to the third embodiment. [Figure 10] FIG. 10 is a development view of the upper side of a sound-insulating cover that is applied to a sound-insulating structure for a collective joint according to a fourth embodiment of the present invention. [Figure 11] FIG. 10 is a development view of the lower side of a sound-insulating cover that is applied to a sound-insulating structure for a collective joint according to a fourth embodiment of the present invention. [Figure 12] FIG. 10 is a development view of a sound-insulating cover that is applied to a sound-insulating structure for a mass joint according to a fifth embodiment of the present invention. [Figure 13] 3 is a plan view of a reinforcing frame applied to the sound-insulating cover. FIG. [Figure 14] 14 is a side view showing a state in which the sound-insulating cover shown in FIG. 12 and the reinforcing frame shown in FIG. 13 are integrated together. [Figure 15] 10 is a perspective view showing a state in which the member in which the sound-insulating cover and the reinforcing frame are integrated is deformed into a cylindrical shape. FIG. [Figure 16] FIG. 16 is a side view illustrating the state in which the member shown in FIG. 15 is attached to a vertical pipe through an inspection hatch and arranged around the collective joint, in relation to the sound-insulating structure for the collective joint according to the fifth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0041] (First embodiment) Hereinafter, a sound-insulating structure for a mass joint according to a first embodiment of the present invention will be described with reference to FIGS. The sound-insulating structure of a mass joint according to this embodiment is applied to the piping structure of a mass joint exemplified in FIG. 1, and has the structure exemplified in FIG. The piping structure 1 shown in Figure 1 includes a collecting joint (collecting pipe joint) 3 that is installed by vertically penetrating the slab 2 of the lower floor of the building, and a collecting joint (collecting pipe joint) 6 that is installed by vertically penetrating the slab 5 of the upper floor. If the building is a multi-story structure such as an apartment building, slabs are installed for the required number of floors, so slabs of other floors are further placed on the lower or upper side of Figure 1, and a collecting joint is installed for each slab. Figure 1 shows an example of collecting joints 3 and 6 installed on the upper and lower floors, among the collecting joints installed on each floor. The collective joint 3 is inserted into the inside of a through hole 2a formed in the slab 2 of the lower floor, and a filler material M such as mortar is filled between the collective joint 3 and the through hole 2a. The collective joint 6 is inserted into the inside of a through hole 5a formed in the slab 5 of the upper floor, and a filler material M such as mortar is filled between the collective joint 6 and the through hole 5a. The collective joint 3 and the collective joint 6 are arranged coaxially one above the other, with one central axis O as a common central axis.

[0042] The manifold 3 includes an upper connecting pipe 11 and a lower connecting pipe 12 connected to the upper connecting pipe 11. The upper connecting pipe 11 has a vertical pipe connecting portion 13 that can be connected to a first vertical pipe P1, and a horizontal pipe connecting portion 14 that protrudes from the side of the vertical pipe connecting portion 13 and can be connected to a horizontal pipe P3. A first vertical pipe P1 is connected to the upper end of the upper connecting pipe 11. The lower connecting pipe 12, the vertical pipe connecting portion 13, and the horizontal pipe connecting portion 14 are integrally formed by, for example, injection molding of a synthetic resin material. The manifold joint 6 has the same configuration as the manifold joint 3, and includes an upper connecting pipe 11, a lower connecting pipe 12, a vertical pipe connecting portion 13, and a horizontal pipe connecting portion 14.

[0043] In the following description, the direction along the central axis O of the vertical pipe connecting part 13 is referred to as the axial direction, the upper connecting pipe 11 side of the vertical pipe connecting part 13 along the axial direction is referred to as the upper side, and the lower connecting pipe 12 side is referred to as the lower side. In addition, in a plan view seen from the axial direction, the direction perpendicular to the central axis O is referred to as the radial direction, and the direction going around the central axis O in a plan view seen from the axial direction is referred to as the circumferential direction.

[0044] The horizontal pipe connecting portions 14 extend radially outward from the peripheral wall of the vertical pipe connecting portion 13. In the example of FIG. In the manifold 3, two of the three horizontal pipe connecting portions 14 are disposed at positions on either side of the central axis O in the radial direction. The remaining horizontal pipe connecting portions 14 extend in a direction that forms a 90° angle in top view with the respective extension directions of the two horizontal pipe connecting portions 14. However, this is not limited to this embodiment, and the number and extension directions of the horizontal pipe connecting portions 14 can be changed as desired. 1, connecting rings 15, to which the horizontal pipes P3 are individually connected, are attached to the radially outer ends of the horizontal pipe connecting portions 14. The outer diameter of the connecting rings 15 is slightly larger than the outer diameter of the horizontal pipe connecting portions 14.

[0045] The lower connecting pipe 12 is tubular and has a smaller diameter below than above. The lower connecting pipe 12 includes a connecting pipe section 16 located at its upper end and connected to the lower side of the upper connecting pipe 11, an inclined pipe section 17 connected to the lower side of the connecting pipe section 16 and gradually decreasing in diameter as it extends downward, and a lower pipe section 18 connected to the lower end of the inclined pipe section 17 and to which the second vertical pipe P2 is connected. The connecting pipe section 16, inclined pipe section 17, and lower pipe section 18 are integrally formed by, for example, injection molding of a synthetic resin material. The outer diameter of the connecting pipe section 16 is equal to the outer diameter of the vertical pipe connecting section 13 of the upper connecting pipe 11. The outer diameter of the lower end of the inclined pipe section 17 is smaller than the outer diameter of the connecting pipe section 16. The axial size of the inclined pipe section 17 is larger than the axial size of the connecting pipe section 16.

[0046] The connecting pipe portion 16 contains, for example, a resin composition containing polyvinyl chloride resin and thermally expandable graphite. That is, the connecting pipe portion 16 is produced by molding the resin composition. Typically, the connecting pipe portion 16 is produced by extrusion molding the resin composition. The connecting pipe part 16 may have a single layer structure in which the entire connecting pipe part 16 is made of a resin composition, or may have a multi-layer structure made of multiple layers. In the case of a multi-layer structure, it is sufficient that any one of the layers is made of a resin composition. For example, when the connecting pipe part 16 has a three-layer structure made of a surface layer, an intermediate layer, and an inner layer, the intermediate layer may be made of a resin composition, and the surface layer, intermediate layer, and inner layer may be made of a resin composition. The heat-absorbing agent may be contained.

[0047] When the intermediate layer contains thermally expandable graphite, it is black in color, so it is preferable that the surface layer and the inner layer contain a colorant other than black so that they can be distinguished from the intermediate layer. The thickness of the surface layer and the inner layer is preferably 0.3 mm to 3.0 mm, and more preferably 0.6 mm to 1.5 mm. If the thickness of the coating layer is 0.3 mm or more, the mechanical strength of the pipe can be sufficiently ensured, and if it is 3.0 mm or less, a decrease in fire resistance can be suppressed. Furthermore, it is preferable that the connection pipe portion 16 meets the performance requirements set forth in JIS K6741.

[0048] In the collective joint 3, the outer diameter of the lower pipe section 18 is smaller than the outer diameter of the connecting pipe section 16 and is formed to be approximately the same as the outer diameter of the lower end of the inclined pipe section 17. The second vertical pipe P2 is fitted into the inside of the lower pipe section 18 from below, thereby connecting the second vertical pipe P2 to the lower connecting pipe 12.

[0049] The collecting joint 6 has the same configuration as the collecting joint 3, and includes a lower connecting pipe 12, a connecting pipe section 16, an inclined pipe section 17, and a lower pipe section 18. At the collecting joint 6 on the upper floor, the upper end of the first vertical pipe P1 is connected to the lower pipe portion 18, and the third vertical pipe P5 is connected to the vertical pipe connecting portion 13. If the building is a multi-story structure such as an apartment building, slabs are provided for the required number of floors, so an additional slab (not shown) is provided below the slab 2 of the lower floor shown in Figure 1, and a joint (not shown) is attached to this slab. Also, an additional slab (not shown) is provided above the slab 5 of the upper floor shown in Figure 1, and a joint (not shown) is attached to this slab, and joints and vertical pipes are provided for the required number of floors.

[0050] In the structure shown in Figure 1, a floor 20 is provided slightly above the horizontal pipe P3, and walls 21 and 22 are provided between the floor 20 and the slab 5 to conceal the joint assembly 3 and 6 and the vertical pipe P1 from the living room side. In the example of Figure 1, the wall 21 is provided on the left side of the vertical pipe P1, and the wall 22 is provided on the right side of the vertical pipe P1. As an example, the walls 21 and 22 can be made of one or two sheets of gypsum board. Of the walls 21 and 22, the wall 21 is a partition wall that separates the interior side of the room, and an inspection hatch 23 that is rectangular in front view is formed in this wall 21 at a height slightly away from the floor 20. A detachable inspection hatch cover (not shown) is attached to this inspection hatch 23, and it is normally closed by the inspection hatch cover. The inspection hatch 23 normally has a width several times that of the vertical pipe P, and the vertical width of the inspection hatch 23 is formed to be approximately the same as or slightly larger than the horizontal width. The inspection hatch 23 is formed in the wall 21 near the vertical pipe P1, and is formed so that the vertical pipe P can be directly seen through the inspection hatch 23 from inside the room. Note that inspection hatch 23 does not have to be formed in advance, and when it becomes necessary to install sound-insulating member 24, an opening can be made in wall 21, and this opening can be used as inspection hatch 23 to install sound-insulating member 24, and then closed with an inspection hatch cover (not shown). Also, inspection hatch 23 can be closed with a non-removable cover to prevent inspection after installation of sound-insulating member 24, and it is sufficient that an opening that allows installation of sound-insulating member 24 is provided in advance or afterwards as inspection hatch 23.

[0051] In the piping structure 1 using the collective joints 3 and 6 shown in Figure 1, if drainage noise leaks into the room when drainage is flowed along the vertical pipes P5, P1, and P2 while the inspection hatch 23 is closed with an inspection hatch cover, soundproofing measures are implemented using the soundproofing material 24 shown in Figures 2 and 3. 2, the sound-insulating member 24 is made of a sound-insulating sheet 25 having a rectangular shape in plan view and a sound-absorbing material (sound-absorbing sheet) 26 attached to one side of the sound-insulating sheet 25. The sound-insulating sheet 25 is made of a resin sheet, such as a soft vinyl chloride resin sheet, a polypropylene sheet, or a polyethylene sheet. Since the sound-insulating member 24 is used by being deformed into a cylindrical shape by a worker on-site as described below, it is preferable that the sound-insulating member 24 has a hardness and thickness that allows the worker to easily deform it into a cylindrical shape by hand. Also, since the sound-insulating member 24 is deformed into a cylindrical shape as described below, wrapped around the vertical pipe P1, and then slid downward along the circumferential surface of the vertical pipe P1, it is preferable that the sound-insulating member 24 be made of a hard resin that can easily slide relative to the vertical pipe P1.

[0052] As an example, the sound-insulating sheet 25 can be formed from a resin composition containing 100 parts by weight of a base resin and 300 to 3,000 parts by weight of an inorganic filler. An olefin-based resin can be used as the base resin. The sound-insulating sheet 25 has a thickness of about 1 to 5 mm and an areal density of 1 to 8 kg / m. 2The base resin of the sound-proofing sheet 25 is not limited to olefin-based resin, but may be elastic material such as modified asphalt, elastomer, rubber, polyolefin resin, soft vinyl chloride resin, or the like. As an example, the sound absorbing material 26 is formed in a sheet shape from a fibrous material. For example, felt, glass wool, rock wool, etc. can be used as the material for the sound absorbing material 26. The thickness of the sound absorbing material 26 is about 1 to 20 mm, and the surface density is 0.1 to 2 kg / m. 2 The material of the sound absorbing material 26 does not have to be a fibrous material, and porous materials such as urethane foam, polyethylene foam, and polypropylene foam may be used as long as they are within the above ranges of thickness and surface density.

[0053] The length of the long side of the sound insulation member 24 is preferably longer than the circumference of the vertical pipe P1 to which it is applied, and is, for example, preferably about 1.2 to several times the circumference of the vertical pipe P1. The length of the short side of the sound-proofing member 24 is preferably slightly longer than the length of the vertical pipe connecting portion 13 of the joint assembly 3, 6 to which it is applied. The sound-insulating member 24 has a plurality of slits formed intermittently at predetermined intervals along its long sides. A plurality of vertical slits 27a are formed on one of the long sides of the sound-insulating member 24, and a plurality of auxiliary slits 27b are formed on the other long side. The vertical slits 27a and the auxiliary slits 27b are both formed so as to divide both the sound-insulating sheet 25 and the sound-absorbing material 26 in their thickness directions. The sound-insulating member 24 has a plurality of vertical slits 27a arranged around its periphery. The interval between adjacent vertical slits 27a, 27a can be set to approximately a fraction of the outer diameter of the horizontal pipe P3 to which the slits 27a are applied.

[0054] The slits 27a and 27b are formed parallel to the short sides of the sound-insulating member 24, for example, by making cuts perpendicular to the long sides of the sound-insulating member 24. The length of the slits 27a and 27b (the length perpendicular to the long sides of the sound-insulating member 24) is preferably longer than the diameter of the horizontal pipe P3 connected to the joint assembly 3 and 6 to which they are applied. When the horizontal pipe P3 is placed above the slab 2, the length of the vertical slit 27a is more preferably equal to the height from the upper surface of the slab 2 to the circumferential upper end of the horizontal pipe P3. For example, when the horizontal pipe P3 is a pipe with a nominal diameter of 75A, the length can be approximately 100 mm. In this embodiment, the length of the auxiliary slit 27b is formed to be approximately the same as the length of the vertical slit 27a, but the auxiliary slit 27b may be formed to be shorter than the vertical slit 27a.

[0055] In the sound-insulating member 24, a convex strip portion 24c is formed at a position sandwiched between adjacent vertical slits 27a, and a convex strip portion 24d is formed at a position sandwiched between adjacent auxiliary slits 27b. The sound-insulating member 24 may have the two-layer structure described above, or may have a single-layer structure consisting of only the sound-insulating sheet 25, omitting the sound-absorbing material 26. Arranging the sound-insulating sheet 25 and the sound-absorbing material 26 overlapping each other is advantageous in terms of improving sound insulation.

[0056] (How to build a soundproof structure) A method for constructing a sound insulating structure by deforming and attaching the sound insulating member 24 to the collective joint 3 shown in FIG. 3 will be described below. As shown in Figure 3, sound-insulating member 24 is inserted through inspection hatch 23 into space 30 between walls 21 and 22 with vertical slit 27a facing downwards, the long side of sound-insulating member 24 oriented horizontally, and the short sides oriented vertically. Sound-insulating member 24 is deformed into a vertical cylindrical shape and placed around vertical pipe P1 located at the back of inspection hatch 23, thereby forming sound-insulating cover 28. In this case, the inner diameter of sound-insulating cover 28 is adjusted to correspond to the outer diameters of upper connecting pipe 11 and lower connecting pipe 12 of the applicable manifold 3, or to be slightly larger than that.

[0057] When the sound-insulating cover 28 is formed from the sound-insulating member 24, auxiliary slits 27b are arranged around the upper peripheral edge of the sound-insulating cover 28. From this state, it is preferable to wind a cord (fastening member) 29 such as a string around the upper end of the sound-insulating cover 28 to narrow the upper opening of the sound-insulating cover 28 and bring the upper end of the sound-insulating cover 28 into close contact with the outer periphery of the vertical pipe P1. The winding force of the cord 29 brings the upper end of the sound-insulating cover 28 into close contact with the outer periphery of the vertical pipe P1, but is set to a level that allows the sound-insulating cover 28 to descend along the vertical pipe P1 after being tightly fitted. A plurality of strips 26d adjacent to auxiliary slits 27b are formed at the upper opening of sound-insulating cover 28. Therefore, by fastening cord 29 from the outside, adjacent strips 26d can be displaced from each other via auxiliary slits 27b, thereby narrowing the inner diameter of the upper opening of sound-insulating cover 28. Cord 29 may be fastened using a simple fastening tool such as a string, or may be fastened using an easily fastening tool such as a lashing belt.

[0058] Once the cable 29 has been tightened, the sound-insulating cover 28 is manually slid downward along the vertical pipe P1 using a tool such as a pushing rod, and the lower part of the sound-insulating cover 28 covers the upper connecting pipe 11 of the collective joint 3. A plurality of vertical slits 27a are provided around the bottom side (lower end opening) of the sound insulating cover 28, forming rectangular portions 24c. As the sound insulating cover 28 descends, the rectangular portions 24c at the lower end of the sound insulating cover 28 come into contact with the horizontal pipe P3. The multiple vertical slits 27a located at the bottom end of the sound-insulating cover 28 each extend in the vertical direction. Furthermore, the width of the strip portions 24c present between the vertical slits 27a, 27a is small, and the strip portions 24c have little bending resistance, so they easily deform along the circumferential surface of the horizontal tube P3 and shift to the side and above the horizontal tube P3, allowing the sound-insulating cover 28 to descend. In the example of Figure 3, the width of the strip portions 24c is approximately half that of the horizontal pipe P3, so when the sound-insulating cover 28 is lowered, two adjacent strip portions 24c are bent upward toward the horizontal pipe P3, and the other strip portions 24c adjacent to these strip portions 24c are slightly curved sideways and positioned offset around the horizontal pipe P3. In this way, the sound-insulating cover 28 can cover the manifold 3 with the horizontal pipe P3 inserted into the slit gaps between the strip portions 24c. As the gap between the vertical slits 27a widens, the lower ends of the strip portions 24c reach far enough below the horizontal pipe P3.

[0059] When the sound-insulating cover 28 descends along the horizontal pipe P3 to a position near the upper end of the vertical slit 27a, the resistance when pushing down increases and the sound-insulating cover 28 no longer descends, so the worker determines that the work of lowering the sound-insulating cover 28 has finished and ends the work of installing the sound-insulating cover 28. By the above-described operations, each of the rectangular portions 26c is deformed so as to avoid the horizontal pipe P3 as shown in FIG. 3, and a sound-insulating structure in which the periphery of the collective joint 3 is covered with the sound-insulating cover 28 can be constructed.

[0060] 3, the sound-insulating structure for the collecting joint 3 can be constructed by a simple operation of inserting the sound-insulating member 24 around the vertical pipe P1 through the inspection hatch 23 to form the sound-insulating cover 28, tying the top of the cover with a cable 29, and sliding it downward. Since the above work can be performed through the inspection hatch 23 after the wall 21 has been constructed, it can be performed without destroying the wall 21, even after the wall 21 has been constructed. Therefore, if it is determined after the wall 21 has been constructed that the drainage noise is loud in the area of ​​the collecting joint 3, it becomes possible to construct the sound-insulating structure through post-construction work. In the sound-insulating structure shown in Figure 3, the upper opening of the sound-insulating cover 28 is tied to the vertical pipe P with a cable 29, so there is no leakage of drainage noise through this part. In addition, the lower end of the sound-insulating cover 28 reaches below the horizontal pipe P3, covering almost the entire joint 3, so leakage of drainage noise can be effectively suppressed.

[0061] (Second embodiment) FIG. 4 shows a sound-insulating member 35 suitable for use in a sound-insulating structure for a mass joint according to a second embodiment of the present invention. The sound-insulating member 35 is made of a sound-insulating sheet 36 having a fan-shaped annular shape in plan view as shown in Fig. 4. A sound-absorbing material made of the same material as the sound-absorbing material 26 described above may be attached to one side of the sound-insulating sheet 36. The sound-insulating sheet 36 is made of a resin sheet, such as a soft polyvinyl chloride resin sheet, a polypropylene sheet, or a polyethylene sheet. As described below, the sound-insulating sheet 36 is used by being deformed into a truncated cone shape by a worker on-site, so it is preferable that the hardness and thickness be such that the worker can easily deform it into a truncated cone shape by hand. Furthermore, since the sound-insulating sheet 36 is deformed into a truncated cone shape as described below and then wrapped around the vertical pipe P1, it is preferable that the sound-insulating sheet 36 be made of a hard resin that can easily slide relative to the vertical pipe P1, since the sheet slides downward along the circumferential surface of the vertical pipe P1.

[0062] As shown in Figure 4, the sound-proofing sheet 36 has an inner edge 36a that is arc-shaped when viewed from above, and an outer edge 36b that is arc-shaped, and has an outer shape of a fan-shaped ring-shaped body having one edge 36c that connects one end of the inner edge 36a to one end of the outer edge 36b, and the other edge 36c that connects the other end of the inner edge 36a to the other end of the outer edge 36b. The length of the inner edge 36a of the sound-insulating sheet 36 is preferably such that when the sound-insulating sheet 36 is deformed into a hollow truncated cone as shown in Figure 5 and one edge 36c is butted against the other edge 36c, the diameter of the circle drawn by the inner edge 36a is approximately equal to the outer diameter of the vertical pipe P1. The length of the outer perimeter 36b of the sound-insulating sheet 36 is preferably such that, when the sound-insulating sheet 36 is deformed into a hollow truncated cone as shown in Figure 5 and one edge 36c is butted against the other edge 36c, the diameter of the circle drawn by the outer perimeter 36b is slightly larger than the outer diameter of the upper connecting pipe 11 of the overlapping joint 3. The sound insulation sheet 36 has a plurality of vertical slits 37 formed intermittently at predetermined intervals along its outer periphery 36b. The interval between adjacent vertical slits 37, 37 may be approximately the same as the interval between the vertical slits 27a, 27a formed in the sound insulation sheet 25 used in the previous embodiment.

[0063] The vertical slits 37 are formed by making cuts in the outer periphery 36b of the sound insulation sheet 36. The length of the vertical slits 37 is preferably longer than the diameter of the horizontal pipe P3. When the horizontal pipe P3 is placed on the slab 2, the length of the vertical slits 37 is preferably equal to the height from the upper surface of the slab 2 to the upper end of the circumference of the horizontal pipe P3. For example, when the horizontal pipe P3 is a pipe with a nominal diameter of 75A, the length can be approximately 100 mm. In the sound insulation sheet 36, convex strip portions 36d are formed at positions sandwiched between adjacent vertical slits 37. The sound-insulating sheet 36 may have a single-layer structure consisting of only the sound-insulating sheet 36, but it may also have a two-layer structure with one side lined with a sound-absorbing material such as glass wool, as in the previous embodiment. Placing a sound-absorbing material over the sound-insulating sheet 36 is advantageous in terms of improving sound insulation.

[0064] As shown in Figure 6, sound-insulating sheet 36 is inserted into space 30 between walls 21 and 22 through inspection hatch 23 with vertical slit 37 facing downwards. The sound-insulating sheet is deformed into a hollow truncated cone shape and placed around vertical pipe P1 located at the back of inspection hatch 23, forming sound-insulating cover 38. Next, one end edge 36c of sound-insulating sheet 36 is attached to the other end edge 36c via adhesive tape or the like, thereby maintaining the shape of sound-insulating cover 38. In this case, the circle formed by the inner periphery 36a is approximately the same as the outer periphery of the vertical pipe P1, and the circle formed by the outer periphery 36b is slightly larger than the outer diameter of the upper connecting pipe 11 of the collective joint 3.

[0065] Once the shape of the sound-insulating cover 38 is maintained by the adhesive tape, the sound-insulating cover 38 is slid downward along the vertical pipe P1 using manual operation and a tool such as a pushing rod, and the lower part of the sound-insulating cover 38 covers the upper connecting pipe 11. A strip portion 36d is formed around the opening at the lower end of the sound-insulating cover 38 with multiple slits 37 around the periphery. As the sound-insulating cover 38 descends, the strip portion 36d at the lower end of the sound-insulating cover 38 abuts against the horizontal pipe P3, but the strip portion 36d located between the vertical slits 37, 37 easily deforms along the circumferential surface of the horizontal pipe P3 and shifts position to the side and above the horizontal pipe P3, allowing the sound-insulating cover 38 to descend. When the upper end of the horizontal tube P3 reaches close to the upper end position of the vertical slit 37, the resistance when pushing down increases and the soundproof cover 38 will no longer descend, so the worker determines that the work of lowering the soundproof cover 38 has finished and ends the work. By the above operations, each strip portion 36d can be deformed to avoid the horizontal pipe P3 as shown in Figure 6, and a sound-insulating structure can be constructed that includes a sound-insulating cover 40 that covers the periphery of the collective joint 3 with the sound-insulating cover 38.

[0066] In the sound-insulating structure shown in Fig. 6, the upper opening of the sound-insulating cover 38 is in close contact with the vertical pipe P, so there is no leakage of drainage noise through this part. In addition, the lower end of the sound-insulating cover 38 reaches below the horizontal pipe P3, covering almost the entire joint assembly 3, so leakage of drainage noise can be effectively suppressed.

[0067] (Third embodiment) 7 to 9 show sound-insulating members suitable for use in the sound-insulating structure of a mass joint according to the third embodiment of the present invention. In this embodiment, the sound-insulating cover 48 has a shape shown in FIG. 9, which is a combination of the upper sound-insulating member 42 shown in FIG. 7 and the lower sound-insulating member 43 shown in FIG. The upper sound-insulating member 42 is made of an upper sound-insulating sheet 46 that has a fan-shaped annular shape in plan view as shown in FIG. 7. The upper sound-insulating sheet 46 is made of a resin sheet, such as a soft polyvinyl chloride resin sheet, a polypropylene sheet, or a polyethylene sheet. As described below, the upper sound-insulating sheet 46 is used by being deformed into a truncated cone shape by a worker on-site. Therefore, it is preferable that the upper sound-insulating sheet 46 has a hardness and thickness that allows the worker to easily deform it into a truncated cone shape by hand. Furthermore, since the upper sound-insulating sheet 46 is deformed into a truncated cone shape as described below and then wrapped around the vertical pipe P1, it is slid downward along the circumferential surface of the vertical pipe P1. Therefore, it is preferable that the upper sound-insulating sheet 46 be made of a hard resin that allows it to slide easily relative to the vertical pipe P1.

[0068] As shown in Figure 7, the upper sound-insulating sheet 46 has an inner edge 46a that is arc-shaped when viewed from above, and an outer edge 46b that is arc-shaped, and has an outer shape of a fan-shaped ring-shaped body having one edge 46c that connects one end of the inner edge 46a to one end of the outer edge 46b, and the other edge 46c that connects the other end of the inner edge 46a to the other end of the outer edge 46b. The length of the inner edge 46a of the upper sound-insulating sheet 46 is preferably such that, when the sound-insulating sheet 46 is deformed into a hollow truncated cone shape as shown in Figure 9 and one edge 46c is butted against the other edge 46c, the diameter of the circle drawn by the inner edge 46a is approximately equal to the outer diameter of the vertical pipe P1. The length of the outer periphery 46b of the upper sound-insulating sheet 46 is preferably such that, when the upper sound-insulating sheet 46 is deformed into a hollow truncated cone shape as shown in Figure 9 and one edge portion 46c is butted against the other edge portion 46c, the diameter of the circle drawn by the outer periphery 46b is slightly larger than the outer diameter of the upper connecting pipe 11 of the overlap joint 3. The length of the edge portion 46c of the upper sound-insulating sheet 46 is set to a length that can sufficiently cover the area from the upper side of the upper connecting pipe 11 to the vertical pipe P1 above it when the manifold 3 shown in Fig. 9 is covered with the upper sound-insulating sheet 46 as described below. In other words, the upper sound-insulating sheet 46 is formed to a size that can cover the area from the part of the vertical pipe P1 that protrudes above the upper connecting pipe 11 (the lower end of the vertical pipe P1) to the upper side of the upper connecting pipe 11 (the connection portion with the vertical pipe P1).

[0069] The lower sound-insulating member 43 is made of a rectangular lower sound-insulating sheet 44 as shown in Fig. 8. The lower sound-insulating sheet 44 is made of a resin sheet, such as a soft polyvinyl chloride resin sheet, a polypropylene sheet, or a polyethylene sheet. As described below, the lower sound-insulating sheet 44 is deformed into a cylindrical shape by a worker on-site before use, and therefore it is preferable that the sheet has a hardness and thickness that allows the worker to easily deform it into a cylindrical shape by hand. The lower sound insulation sheet 44 has a plurality of vertical slits 47 formed intermittently at predetermined intervals along one long side 44a. The interval between adjacent vertical slits 47, 47 may be approximately the same as the interval between the vertical slits 27a, 27a provided in the sound insulation member 24 used in the first embodiment. The length of the long side 44a may be approximately the same as the length of the long side of the sound insulation sheet 25 in the first embodiment. The length of the vertical slits 47 may be approximately the same as the length of the vertical slits 27a in the first embodiment. The length of the short side portion 44b of the lower sound-insulating sheet 44 is set to a length that can cover the upper connecting pipe 11 from the upper side to the lower end side when the collective joint 3 shown in Figure 9 is covered with the lower sound-insulating sheet 44 as described below.

[0070] As shown in Figure 9, a lower sound-insulating member 43 with slits 47 facing downward and an upper sound-insulating sheet 46 with the outer edge 46b facing downward are prepared, and these are arranged around the vertical pipe P1 from the inspection hatch 23 as shown in Figure 9, each deformed into a hollow truncated cone shape or a cylindrical shape. When the upper sound-insulating member 42 is deformed into a hollow truncated cone and placed on the outer periphery of the vertical pipe P1, the inner diameter of the circle formed by the inner side 46a becomes approximately equal to the outer diameter of the vertical pipe P1. The upper end of the cylindrical lower sound-insulating member 43 and the lower edge of the hollow truncated cone-shaped upper sound-insulating sheet 46 can be connected together in a continuous, integrated manner using adhesive tape or the like. This allows the sound-insulating cover 48 to be created, covering the periphery of the vertical pipe P1.

[0071] Once the shape of the sound-insulating cover 48 is maintained by the adhesive tape, the sound-insulating cover 48 is slid downward along the vertical pipe P1 using manual operation and a tool such as a pushing rod to cover the upper connecting pipe 11 with the sound-insulating cover 48. A strip portion 44d is formed around the opening at the lower end of the sound-insulating cover 48, with multiple vertical slits 47 around the periphery. As the sound-insulating cover 48 descends, the strip portions 44d at the lower end of the sound-insulating cover 48 come into contact with the horizontal pipe P3, but the strip portions 44d present between the vertical slits 47, 47 easily deform along the circumferential surface of the horizontal pipe P3, shifting position beside and above the horizontal pipe P3 and allowing the sound-insulating cover 48 to descend. When the upper end of the horizontal tube P3 reaches the upper end position of the slit 47, the resistance when pushing down increases and the sound-insulating cover 48 no longer descends, so the worker determines that the sound-insulating cover 48 has finished descending and ends the processing work. By performing the above operations, each strip portion 44d is deformed to avoid the horizontal pipe P3 as shown in Figure 9, and a sound-insulating structure is constructed that includes a sound-insulating cover 48 that covers the periphery of the collective joint 3 with the upper sound-insulating member 42 and the lower sound-insulating member 43.

[0072] In the sound-insulating structure shown in Figure 9, the upper end opening of the upper sound-insulating member 42 is in close contact with the vertical pipe P, so there is no leakage of drainage noise through this part. In addition, the lower end of the lower sound-insulating member 43 reaches below the horizontal pipe P3, covering almost the entire joint assembly 3, so leakage of drainage noise can be effectively suppressed.

[0073] (Fourth embodiment) 10 and 11 show sound-insulating members suitable for use in the sound-insulating structure of a mass joint according to the fourth embodiment of the present invention. In this embodiment, the sound-insulating member has a shape that combines an upper sound-insulating member 42 shown in FIG. 10 and a lower sound-insulating member 50 shown in FIG. The upper sound-insulating member 42 is the same as the upper sound-insulating member 42 shown in FIG. 8, and the long side 51a of the lower sound-insulating sheet 51 has the same length as the long side 44a of the lower sound-insulating member 43. The short side of the lower sound-insulating sheet 51 has the same length as the short side 44b of the lower sound-insulating member 43.

[0074] A plurality of triangular notched vertical slits 52 are formed intermittently at predetermined intervals along one long side 51a of the lower sound-insulating sheet 51. The spacing between adjacent vertical slits 52, 52 may be approximately the same as the spacing between vertical slits 27a, 27a provided in the sound-insulating member 24 used in the first embodiment. The spacing between adjacent vertical slits 52, 52 defined here means the spacing between center lines passing through the centers of the vertical slits 52 in the width direction. The length of the long side portion 51a may be approximately the same as the length of the long side portion of the sound insulation sheet 25 of the first embodiment. The depth (length) of the vertical slit 52 may be approximately the same as the depth (length) of the vertical slit 27a of the first embodiment. A protruding strip portion 51d is formed between adjacent vertical slits 52, 52.

[0075] In the fourth embodiment, the upper sound-insulating member 42 and the lower sound-insulating member 50 are used in combination in the same manner as in the case of the upper sound-insulating member 42 and the lower sound-insulating member 43 of the third embodiment shown in FIG. The upper sound-insulating member 42 and the lower sound-insulating member 50 are combined and arranged in a cylindrical shape around the vertical pipe P1, as shown in FIG. 9 . The arrangement of the two members is fixed using adhesive tape, and the lower sound-insulating member 50 can be lowered along the vertical pipe P1. As the lower sound-insulating member 50 descends, the lower end of the lower sound-insulating member 50 reaches the horizontal pipe P3. The strip portion 51d at the lower end of the lower sound-insulating member 50 is sandwiched between the vertical slits 52, 52, and has low deformation resistance. Therefore, the strip portion 51d easily deforms and moves to the side or above the horizontal pipe P3. Furthermore, because the vertical slits 52 have a wide opening, when the vertical slits 52 reach the top of the horizontal pipe P3, the horizontal pipe P3 fits into the opening of the slit 52, 52, facilitating deformation of the strip portion 51d in contact with the horizontal pipe P3. Therefore, the lower end of the lower sound-insulating member 50 can be reliably moved to the lower end position of the horizontal pipe P3 with little resistance. Therefore, a sound insulating structure can be constructed in which the collective joint 3 is covered by the upper sound insulating member 42 and the lower sound insulating member 50 in the same manner as in the case shown in FIG.

[0076] (Fifth embodiment) 12 to 15 show sound-insulating members suitable for use in the sound-insulating structure of the group joint according to the fifth embodiment of the present invention. In this embodiment, the sound insulating cover has a shape that combines the sound insulating member 24 shown in FIG. 12 with the reinforcing member 55 shown in FIG. The sound-insulating member 24 is the same as the sound-insulating member 24 shown in FIG. 13, the reinforcing member 55 is made up of two long vertical beams 55a and a number of short (six in the example of FIG. 13) horizontal beams 55b integrated in a grid pattern. The reinforcing member 55 is made of, for example, hard resin or metal. The reinforcing member 55 is attached so as to be positioned between the plurality of vertical slits 27a and auxiliary slits 27b of the sound-insulating member 24, as shown in FIG. When the sound insulating member 24 with the reinforcing member 55 is deformed into a cylindrical shape as shown in FIG.

[0077] The following describes the process of deforming and attaching the sound-insulating member 24 to the mass joint 3 shown in FIG. 16 to construct a sound-insulating structure. As shown in Figure 16, the sound-proofing member 24 is inserted into the space 30 between the walls 21 and 22 from the inspection hatch 23 with the vertical slit 27a facing downward, which is the same as the case previously described in the first embodiment based on Figure 3. The sound-insulating member 24 is deformed into a cylindrical shape and placed around the vertical pipe P1 located at the back of the inspection hatch 23 to form the sound-insulating cover 56. In this case, the inner diameter of the sound-insulating cover 56 is adjusted to be equivalent to the outer diameters of the upper connecting pipe 11 and lower connecting pipe 12 of the applicable manifold 3, or to be slightly larger than that.

[0078] When the sound-insulating cover 56 is formed from the sound-insulating member 24, auxiliary slits 27b are arranged on the peripheral side of the upper end of the sound-insulating cover 28. From this state, a cord 29 such as a string is wound around the upper end of the sound-insulating cover 56 to narrow the upper end opening of the sound-insulating cover 56, and the upper end of the sound-insulating cover 56 is brought into close contact with the outer periphery of the vertical pipe P1, similar to the procedure described with reference to FIG.

[0079] Once the cable 29 has been wound, the sound-insulating cover 56 is manually slid downward along the vertical pipe P1 using a tool such as a pushing rod, and the lower part of the sound-insulating cover 56 covers the upper connecting pipe 11 of the manifold joint 3. The cylindrical sound-insulating cover 56 is reinforced by a reinforcing member 55 provided on its inner surface and maintains its cylindrical shape, so that the lower end opening of the sound-insulating cover 56 can be securely inserted into and covered by the upper connecting pipe 11 of the manifold 3. When the sound-insulating cover 56 is further lowered, the rectangular portions 24c located at the opening at the lower end of the sound-insulating cover 56 come into contact with the horizontal pipe P3 and are deformed. Because the rectangular portions 24c have little bending resistance, they easily deform along the circumferential surface of the horizontal pipe P3, allowing the sound-insulating cover 56 to be lowered. When the sound insulating cover 56 stops descending, the worker determines that the work of lowering the sound insulating cover 56 has finished, and ends the work. By the above operation, each of the rectangular portions 24c is deformed so as to avoid the horizontal pipe P3 as shown in FIG. 16, and a sound insulating structure in which the periphery of the collective joint 3 is covered with the sound insulating cover 56 can be constructed. [Explanation of symbols]

[0080] 1...Piping structure, 2, 5...Slab, 3, 6...Collecting joint, 11...Upper connecting pipe, 12...lower connecting pipe, 14...horizontal pipe connecting portion, 20...floor, 21, 22...wall, 23...inspection hatch, 24...sound insulation member, 25...sound insulation sheet, 26...sound absorbing material (sound absorbing sheet), 27a...vertical slit, 27b...auxiliary slit, 28...sound insulation cover, 29... Cable (binding member), 35... Sound insulation member, 36... Sound insulation sheet, 37... Vertical slit, 38... Sound insulation cover, 42... Upper sound insulation member, 43... Lower sound insulation member, 44... Lower sound insulation sheet, 46...upper sound-insulating sheet, 47...vertical slit, 48...sound-insulating cover, 52...vertical slit, 55...reinforcing member, 56...sound-insulating cover, P1, P2, P5...vertical pipe, P3...horizontal pipe.

Claims

1. A collective joint having a vertical pipe connection part connectable to a vertical pipe and a horizontal pipe connection part protruding from a side surface of the vertical pipe connection part and connectable to a horizontal pipe is provided penetrating the slab of the building from top to bottom, A sound-insulating structure for a collecting joint, in which a wall is provided to conceal the collecting joint and the vertical pipe from the indoor side, and an inspection hatch is provided in the wall near the vertical pipe, A sound insulation structure for a collective joint, which is composed of a vertical cylindrical sound insulation member equipped with a sound insulation sheet around the collective joint near the inspection hatch, and a sound insulation cover having a plurality of vertical slits extending vertically from the lower end of the sound insulation member in the circumferential direction of the sound insulation member on the bottom side of the sound insulation member.

2. The horizontal pipe is inserted into the vertical slit whose interval is increased, and the sound-insulating cover covers the periphery of the collective joint. The sound-insulating structure of the mass joint according to claim 1.

3. a plurality of auxiliary slits extending vertically from the upper end periphery of the sound-insulating member are provided in the circumferential direction of the sound-insulating member on the upper side of the sound-insulating member, and an upper end opening of the sound-insulating member is tightly attached to the outer circumferential surface of the vertical pipe by a fastening member wound around the outer periphery of the portion where the auxiliary slits are formed; The sound-insulating structure of the mass joint according to claim 1 or 2.

4. The sound-insulating member includes the sound-insulating sheet and a sound-absorbing material lined within the sound-insulating sheet. The sound-insulating structure of the mass joint according to claim 1 or 2.

5. an inner diameter of an upper end opening of the sound-insulating member is smaller than an inner diameter of a lower end opening of the sound-insulating member, the upper end opening is sized to cover a peripheral surface of the vertical pipe, and the lower end opening is sized to cover a peripheral surface of the manifold. The sound-insulating structure of the mass joint according to claim 1 or 2.

6. the sound-insulating member includes an upper sound-insulating member that covers the lower end portion of the vertical pipe and the connecting portion of the vertical pipe, and a lower sound-insulating member that is integrated with the upper sound-insulating member and has a plurality of the vertical slits in the circumferential direction, The sound-insulating structure of the mass joint according to claim 1 or 2.

7. a manifold having a vertical pipe connection portion connectable to a vertical pipe and a horizontal pipe connection portion protruding from a side surface of the vertical pipe connection portion and connectable to a horizontal pipe, A collective joint is provided around the horizontal pipe connection portion, and the collective joint is made of a vertical cylindrical sound-insulating member equipped with a sound-insulating sheet, and a sound-insulating cover is provided on the bottom side of the sound-insulating member, the sound-insulating member having a plurality of vertical slits extending vertically from the lower end of the sound-insulating member in the circumferential direction of the sound-insulating member.

8. The sound-insulating cover is attached around the horizontal pipe connecting portion by inserting the horizontal pipe connecting portion into a slit gap formed by widening the interval between the vertical slits. The assembly joint according to claim 7.

9. a plurality of auxiliary slits extending vertically from the upper peripheral edge of the sound-insulating member in the circumferential direction of the sound-insulating member are provided on the upper side of the sound-insulating member; The assembly joint according to claim 7 or claim 8.

10. The sound-insulating member includes the sound-insulating sheet and a sound-absorbing material lined within the sound-insulating sheet. The assembly joint according to claim 7 or claim 8.

11. the sound-insulating member includes an upper sound-insulating member that covers the lower end portion of the vertical pipe and the connecting portion of the vertical pipe, and a lower sound-insulating member that is integrated with the upper sound-insulating member and has a plurality of the vertical slits in the circumferential direction, The assembly joint according to claim 7 or claim 8.

12. A sound-insulating cover is made of a vertical cylindrical sound-insulating member provided with a sound-insulating sheet, and is attached to a manifold joint having a vertical pipe connection part for connecting vertical pipes and a horizontal pipe connection part for connecting horizontal pipes, A sound-insulating cover has a plurality of vertical slits at a predetermined interval around the circumferential direction of the opening at the lower end of the sound-insulating member, and the vertical slits are longer than the outer diameter of the horizontal pipe.

13. The sound-proofing member has an opening at an upper end thereof, and a plurality of auxiliary slits are provided at predetermined intervals in the circumferential direction of the opening. The sound insulating cover according to claim 12.

14. A sound absorbing material is provided on the inner surface side of the sound insulation sheet. The sound insulating cover according to claim 12 or 13.

15. the sound-insulating member includes an upper sound-insulating member that covers the lower end portion of the vertical pipe and the connecting portion of the vertical pipe, and a lower sound-insulating member that is integrated with the upper sound-insulating member and has a plurality of the vertical slits in the circumferential direction, The sound insulating cover according to claim 12 or 13.

16. A collective joint having a vertical pipe connection part connectable to a vertical pipe and a horizontal pipe connection part protruding from a side surface of the vertical pipe connection part and connectable to a horizontal pipe is provided penetrating the slab of the building from top to bottom, A method for constructing a soundproof structure by providing a wall that covers the manifold and the vertical pipe, and attaching a soundproof cover to the manifold, which has an inspection hatch in the wall near the vertical pipe, A sound-insulating member is formed by arranging a sound-insulating sheet having a plurality of slits in an array and forming the sound-insulating sheet into a vertical cylindrical shape around the vertical pipe in the vicinity of the inspection hatch so that the slits are positioned on the lower side to form vertical slits. A method for constructing a soundproofing structure for a collective joint, in which the soundproofing member is moved downward from the vicinity of the inspection hatch to widen the gap of the vertical slit formed along the lower end opening of the soundproofing member, and the horizontal pipe is inserted into the gap of the vertical slit to form a soundproofing structure.

Images