JP7526061B2 - Sound insulation cover and piping structure, and installation method of sound insulation cover - Google Patents

Description

The present invention relates to a soundproofing cover, a piping structure, and a method for installing the soundproofing cover.

For single-pipe drainage systems used for drainage of buildings, various companies sell collective joints and leg joints. When these are installed at sites where sound insulation is required, sound-insulating covers are wrapped around the exterior of the joints and the pipes connected to the joints.
For example, a structure is known in which the outer periphery of a thermally expandable fire-resistant material in a resin collective joint is covered with a sound-insulating, vibration-proof sheet, and the upper end of the sound-insulating, vibration-proof sheet is made to protrude above the upper end of the slab penetration hole portion (Patent Document 1).
Furthermore, a soundproofing cover that can be easily attached to an elbow of an existing pipe even in a narrow space is known that is made mainly of a sound-absorbing foam resin sheet, has a strip-shaped part that is wrapped around the elbow, and has adhesive tape that secures the periphery (Patent Document 2).

JP 2016-142003 A JP 2011-033055 A

The above-mentioned patent documents do not take into consideration the end faces of the joints, i.e., the connection parts of the joints, which particularly refer to the flange shapes of the socket parts of the leg joints and the branch pipe connection parts of the collective joints.
From the standpoint of ensuring sound insulation, if the end face of the joint is exposed, it is necessary to eliminate the exposed portion by wrapping it with a sound-proof cover or tape.

In recent years, PVC (polyvinyl chloride) pipes are often connected to cast iron joints as vertical pipes or horizontal branch pipes. PVC pipes are thinner than cast iron joints and conventional fire-resistant double-layer pipes. Therefore, a step occurs at the connection between the cast iron joint and the PVC pipe.
Furthermore, even if a relatively thin plastic joint is used, if the socket portion of the joint is of the variable adapter diameter type, a step may occur.

When a normal sound insulation cover (a laminate of sound absorbing material and sound insulation sheet) is wrapped around the above-mentioned step, the sound insulation cover comes into contact with the larger diameter side of the step, but does not deform along the smaller diameter side. In other words, normal sound insulation covers have poor conformability to the step.
Furthermore, if the step is large, even if tape is wrapped around the surface instead of the soundproof cover, wrinkles will form in the tape, making it difficult to wrap. These factors make the work difficult and the appearance poor.

Furthermore, the above-mentioned joints are mainly installed under the floor or near the ceiling of a building, or underground. For example, it is desirable to install the horizontal branch of the collective joint as close to the floor surface as possible due to the slope. Therefore, the working space for performing soundproofing treatment on the joint end face is narrow, and workability is poor.
Therefore, ease of installation is required for the installation of soundproofing covers.

The present invention was made in consideration of the above-mentioned circumstances, and aims to provide a soundproofing cover that is easy to install when performing soundproofing treatment on the joint end surface.

In order to solve the above problems, the present invention proposes the following means.
The sound-insulating cover of the present invention comprises a strip-shaped sound-insulating material and a sound-absorbing material laminated on the sound-insulating material and arranged along the longitudinal direction of the sound-insulating material, and the sound-absorbing material is arranged at intervals in the short direction of the sound-insulating material.

According to this invention, the sound absorbing material is provided at both ends of the strip-shaped sound insulating material in the short direction with a gap therebetween. That is, the sound insulating cover has a step in which the center is recessed in the short direction.
When this sound insulation cover is wrapped around a flange portion (convex step) that occurs at the connection between the joint and the horizontal pipe, for example, the sound absorbing material provided at both ends of the sound insulation cover in the short direction contacts both sides of the flange portion in the axial direction of the horizontal pipe. In addition, no sound absorbing material is provided at the portion where the flange portion and the sound insulation cover contact in the radial direction of the horizontal pipe, and the sound insulation material directly contacts the flange portion.

Here, if a sound-absorbing material is provided in the area in contact with the flange, when the sound-insulating cover is wrapped around the flange, the sound-absorbing material will deform along the flange. In other words, the entire sound-insulating cover will have a radially bulging shape near the flange. In other words, it will have poor conformability to the convex step.
Therefore, by forming the portion of the sound insulation cover that contacts the flange portion (the center portion in the short direction of the sound insulation cover) in a concave shape, it is possible to prevent the sound insulation cover from becoming bulged near the flange portion. In other words, it is possible to ensure that the shape of the sound insulation cover conforms to the flange portion.
This makes it possible to provide the soundproof cover even in cases where the distance between the edge of the flange portion and the wall at the installation site is narrow and sufficient space cannot be secured. In other words, the installation workability can be improved.

The device may also include a strip-shaped sound-proofing material and a sound-absorbing material that is laminated on the sound-proofing material and arranged along the longitudinal direction of the sound-proofing material, and the sound-absorbing material may be arranged in the center of the short side of the sound-proofing material.

According to this invention, the sound absorbing material is attached only to the center portion in the short side direction of the strip-shaped sound insulating material. That is, the sound insulating cover has a step in which the center portion is convex in the short side direction.
When this sound-insulating cover is wrapped around a concave step that occurs at the connection between the leg joint and a vertical pipe that has a smaller diameter than the leg joint, for example, the sound-absorbing material provided in the center of the short side of the sound-insulating cover comes into contact with the concave step. In addition, no sound-absorbing material is provided at the area where the sound-insulating cover comes into contact with the end of the leg joint and the end of the vertical pipe, and the sound-insulating material comes into direct contact with the end of the leg joint and the end of the vertical pipe.

Here, if sound-absorbing material is provided at the portion in contact with the end of the leg joint and the end of the vertical tube, when the sound-insulating cover is wrapped around the concave step, the sound-absorbing material only comes into contact with the end of the leg joint, and does not deform along the vertical tube. In other words, the thickness of the sound-absorbing material is added to the diameter of the leg joint, and the sound-insulating cover becomes shaped as if it covers the concave portion. In other words, the conformity to the concave step becomes poor.
Therefore, by making the part that contacts the concave step (the center of the short side of the sound insulation cover) convex, it is possible to prevent the thickness of the sound absorbing material from being added to the end of the leg joint. Furthermore, it is possible to efficiently bring the sound absorbing material into close contact with the recess. In other words, it is possible to ensure the shape of the concave step.
This makes it possible to provide the soundproof cover even in cases where the distance between the leg joint and the wall of the installation site is narrow and sufficient space cannot be secured.

The piping structure according to the present invention includes a piping component having a step portion formed on its outer surface and the sound-insulating cover, and the sound-insulating cover is fixed to match the shape of the step portion.

According to this invention, the sound insulation cover is fixed to match the shape of the step. This makes it possible to prevent the sound-absorbing material from impairing the conformability of the sound insulation cover. In other words, even in a narrow installation location, the sound insulation cover can be easily installed while still ensuring sound insulation.

In addition, the sound insulation cover is intended to cover only the periphery of the step of the piping component. If the entire piping component including the step were to be covered with a single sound insulation cover, the sound insulation cover would become large and its shape would become even more complicated.
That is, by providing a sound insulation cover intended to cover only the periphery of the step portion, it is possible to reduce the area and simplify the shape, and therefore the cost of the sound insulation cover can be reduced.

The method for installing the sound-insulating cover according to the present invention also involves fixing the sound-insulating cover so that the sound-absorbing material comes into contact with the piping component while avoiding the stepped portion.

According to this invention, the sound insulating cover is fixed so that the sound absorbing material is in contact with the piping component while avoiding the stepped portion.
This allows the sound-absorbing material to avoid the step portion and adhere closely to the piping components. This makes it possible to absorb the sound generated by wastewater flowing through the pipe. Furthermore, by providing a sound-proofing material on the outside of the sound-absorbing material, it is possible to prevent the above-mentioned sound from leaking to the outside. Here, the step portion that is not in contact with the sound-absorbing material (for example, the flange portion or the leg joint end portion) is relatively thicker than the portion that is in contact with the sound-absorbing material. Therefore, sound is less likely to be transmitted to the outside than the portion that is in contact with the sound-absorbing material. Therefore, sound insulation can be ensured simply by covering it with a sound-proofing material.
In other words, even in a narrow installation location, the sound-insulating cover can be easily installed while ensuring sound insulation.

The present invention provides a soundproofing cover that is easy to install when performing soundproofing treatment on the joint end surface.

1 is a side view of a piping structure to which a sound-insulating cover according to an embodiment of the present invention is attached. FIG. 2 is a perspective view of a sound-insulating cover according to an embodiment of the present invention in which sound-absorbing materials are provided at intervals in the short side direction of the sound-insulating material. This is a modification in which the sound insulation material is exposed over the entire width of the sound insulation cover at the longitudinal end portions of the sound insulation cover shown in FIG. 2 . FIG. 2 is a perspective view of a sound-insulating cover according to an embodiment of the present invention in which a sound-absorbing material is provided at the center in the short side direction of the sound-insulating material. This is a modified example in which the sound insulation material is exposed over the entire width of the sound insulation cover at the longitudinal end portions shown in FIG. 4 is an example showing a state in which the sound insulating cover shown in FIG. 2 or FIG. 3 is attached to a flange portion (convex portion) of a piping structure. 7 is a diagram showing a state in which a sound-insulating cover having a sound-absorbing material over the entire short-side direction is attached to a flange portion (convex portion) of the piping structure shown in FIG. 6 . 6 is an example showing a state in which the sound insulating cover shown in FIG. 4 or FIG. 5 is attached to a step portion (recess) of a piping structure. 9 is a diagram showing a state in which a sound-insulating cover having a sound-absorbing material over the entire short-side direction is attached to a step portion (recess) of the piping structure shown in FIG. 8 .

Hereinafter, a sound insulation cover and a piping structure according to an embodiment of the present invention will be described with reference to the drawings.
As shown in Fig. 1, the piping structure 100 includes a vertical pipe 10, a horizontal pipe 20, a connecting pipe 30, a joint 40, a leg joint 50, a first sound-insulating cover 60, and a second sound-insulating cover 70. The piping structure 100 is mainly used as a drainage pipe for a building. For example, in the case of a building having multiple floors, the joint 40 is provided for each floor.

The flow of wastewater through the piping structure 100 is as follows. First, wastewater generated on a certain floor is collected by the horizontal pipe 20 into the collecting joint 40. Similarly, wastewater generated on upper floors and collected in the same way is collected into the collecting joint 40 through the vertical pipe 10. This process is repeated from the upper floors to the lower floors. The collected wastewater finally flows down to the leg joint 50 installed under the floor of the lowest floor. The wastewater that flows down to the leg joint 50 is drained into a drainage facility not shown.

The vertical pipes 10 connect a plurality of collecting joints 40 provided on each floor of a building. The vertical pipes 10 transport wastewater flowing down from the collecting joints 40 on upper floors to the collecting joints 40 on lower floors. That is, the upstream end of the vertical pipes 10 is connected to an upper vertical pipe connection portion 41 of the collecting joint 40. In addition, the downstream end of the vertical pipes 10 is connected to a lower vertical pipe connection portion 43 of the collecting joint 40.
The horizontal pipe 20 is connected to the drainage sections of water facilities, including kitchens, baths, kitchens, etc., provided on each floor of the building. The horizontal pipe 20 collects wastewater generated from each facility and transports it to a collecting joint 40. The horizontal pipe 20 is connected to a horizontal pipe connection section 42 of the collecting joint 40.

The collecting joint 40 collects wastewater generated on each floor and allows it to flow down to the vertical pipe 10 connected to the lower floor. The collecting joint 40 includes an upper vertical pipe connection section 41, a horizontal pipe connection section 42, a lower vertical pipe connection section 43, a water collection chamber 44, and a main pipe section 45. A flange section F is provided in the horizontal pipe connection section 42. Here, the horizontal pipe connection section 42 is a receiving port. The horizontal pipe 20 is arranged in the horizontal pipe connection section 42. A rubber ring R is arranged inside the horizontal pipe connection section 42. The rubber ring R is covered by a cover C so that it does not come off the horizontal pipe connection section 42. The part of the horizontal pipe connection section 42 where the rubber ring R is arranged protrudes radially outward. This part is the flange section F.
The collecting joint 40 is provided for each floor in a multi-story building, and collects wastewater generated on each floor and wastewater flowing down from the upper floors, and allows it to flow down to the vertical pipe 10 provided on the lower floor side. In addition, the connecting pipe 30 is connected to the lower vertical pipe connection part 43 of the collecting joint 40 provided on the lowest floor, and allows the wastewater to flow down to the leg joint 50.
Cast iron or rigid polyvinyl chloride is preferably used as the material of the collective joint 40. In this embodiment, the collective joint 40 uses a "Fireproof Plastic AD Joint HG (manufactured by Sekisui Chemical Co., Ltd.)" with a pipe diameter of 100A. In other words, the outer diameter of the lower vertical pipe connection part 43 of the collective joint 40 (particularly the part connected to the connecting pipe 30) is 149 mm.

The leg joint 50 transports wastewater generated in the building to a drainage facility outside the building. The leg joint 50 includes an upstream connection port 51, a curved pipe portion 52, and a downstream connection port 53. As described above, the upstream connection port 51 is connected to the connecting pipe 30. The downstream connection port 53 is connected to a drainage facility (not shown).
Cast iron or rigid polyvinyl chloride is preferably used as the material of the leg joint 50. In this embodiment, the leg joint 50 uses a pipe diameter of 100A x 125A of "AD leg joint slim direct connection short type with cleaning port dedicated to the lowest floor merging system (manufactured by Sekisui Chemical Co., Ltd.)". In other words, the outer diameter of the lower vertical pipe connection part 43 of the collecting joint 40 (particularly the part connected to the connecting pipe 30) is 149 mm.

In the piping structure 100, the connecting pipe 30 connects between the collective joint 40 provided on the lowest floor and the leg joint 50 provided under the floor of the lowest floor. That is, the upstream end of the connecting pipe 30 is connected to the lower vertical pipe connection part 43 of the collective joint 40, and the downstream end is connected to the upstream connection port 51 of the leg joint 50. A gap is provided between the lower vertical pipe connection part 43 of the collective joint 40 and the upstream connection port 51 of the leg joint 50, and the connecting pipe 30 is exposed to the outside from the gap.
Moreover, a polyvinyl chloride pipe is preferably used as the connecting pipe 30. In this embodiment, the connecting pipe 30 is a cylindrical pipe having a nominal diameter of 100A (outer diameter of 114 mm) and a wall thickness of 6.6 mm.

6, the first sound-proof cover 60 is provided mainly around a convex step formed by a flange portion F of a connection portion (horizontal pipe connection portion 42) between the horizontal pipe 20 and the collective joint 40. The first sound-proof cover 60 prevents drainage noise generated at the horizontal pipe connection portion 42 from propagating to the outside.
2, the first sound-insulating cover 60 is a laminate of a sound-insulating material 61 and a sound-absorbing material 62. The sound-absorbing materials 62 are provided at intervals in the short-side direction of the sound-insulating material 61. That is, in this embodiment, the first sound-insulating cover 60 has a concave step in the center in the short-side direction. In other words, the sound-insulating material 61 is exposed in the center in the short-side direction of the first sound-insulating cover 60.

The first sound insulation cover 60 has a band-like shape when deployed. Here, the band-like shape refers to a directional rectangular shape (non-square shape). The band-like shape refers to a shape in which, of two sides perpendicular to each other, the side extending in a first direction is longer than the side extending in a second direction. The first direction is the longitudinal direction, and the second direction is the lateral direction.
The sound absorbing material 62 is provided along the longitudinal direction of the sound insulating material 61. In other words, the longitudinal lengths of the sound insulating material 61 and the sound absorbing material 62 are equal. Alternatively, as shown in Fig. 3, the sound absorbing material 62 may not be laminated only at one longitudinal end of the sound insulating material 61, and the sound insulating material 61 may be exposed over the entire range in the lateral direction.

As shown in Fig. 8, the second sound-proofing cover 70 is provided on a concave step 31 that occurs mainly at the connection between the collective joint 40, the connecting pipe 30, and the leg joint 50. The second sound-proofing cover 70 prevents the drainage sound generated at the step 31 from propagating to the outside. The step 31 is formed by the lower end surface of the collective joint 40, the outer circumferential surface of the connecting pipe 30, and the upper end surface of the leg joint 50. The step 31 is an annular recess. The step 31 extends continuously around the entire circumference of the connecting pipe 30.
As shown in Fig. 4, the second sound-insulating cover 70 is a laminate of a sound-insulating material 71 and a sound-absorbing material 72. The sound-absorbing material 72 is provided in the center of the sound-insulating material 71 in the short-side direction. That is, in this embodiment, the second sound-insulating cover 70 has a convex step in the center of the short-side direction. In other words, the sound-insulating material 71 is exposed at both ends of the second sound-insulating cover 70 in the short-side direction.

The second sound-proofing cover 70 has a band-like shape when deployed. The sound-absorbing material 72 is provided along the longitudinal direction of the sound-proofing material 71. In other words, the longitudinal lengths of the sound-proofing material 71 and the sound-absorbing material 72 are equal. Alternatively, as shown in FIG. 5, the sound-absorbing material 72 may not be laminated only at one longitudinal end of the sound-proofing material 71, and the sound-proofing material 71 may be exposed over the entire range in the lateral direction.

The difference between the first sound-insulating cover 60 and the second sound-insulating cover 70 is the positions in the short-side direction of the sound-absorbing material 62 and the sound-absorbing material 72. In other words, the materials of the constituent members are the same as described below.
First, sheets of soft vinyl chloride, butyl rubber, or polyolefin are preferably used for the sound insulation materials 61 and 71. The thickness of each of the sound insulation materials is preferably 0.8 to 3 mm.
The sound absorbing materials 62 and 72 are preferably mainly made of felt, polyester fiber, urethane foam, or glass wool. The thickness of the sound absorbing materials 62 and 72 is preferably 5 to 10 mm. The ratio of the thickness of the sound insulating materials 61 and 71 to the thickness of the sound absorbing materials 62 and 72 is, for example, 8% to 60%.

The above-mentioned members are appropriately selected depending on the attachment locations of the first sound-insulating cover 60 and the second sound-insulating cover 70 and the sound insulation properties required.
The longitudinal dimensions of the first sound-insulating cover 60 and the second sound-insulating cover 70 can be appropriately determined depending on the construction site. For example, if only the transverse dimensions are determined in advance, the longitudinal dimensions can be cut to any length at the construction site. In this case, the sound-absorbing material 62 and the sound-absorbing material 72 at the longitudinal ends can be cut to the state shown in Figures 3 and 5.

Next, a construction method for attaching the first sound-insulating cover 60 and the second sound-insulating cover 70 to a piping component member having a step portion formed on the outer surface of the piping structure 100 will be described.
As shown in Fig. 6, when attaching the first sound-insulating cover 60 to the horizontal pipe connection portion 42, the sound-absorbing material 62 is placed on the inside and the strip-like longitudinal direction is wrapped around the periphery. At this time, when the end of the sound-insulating material 61 is exposed over the entire range in the lateral direction as shown in Fig. 3, after wrapping the first sound-insulating cover 60, one end of the sound-insulating material 61 is overlapped on the other end and fixed.
After wrapping the first sound-proof cover 60, a cable tie or tape is wrapped around the periphery to secure it in place. When the end of the sound-proof material 61 is exposed over the entire range in the short direction as shown in Fig. 3, a hook-and-loop fastener 63 may be provided on the exposed portion and attached to a hook-and-loop fastener (not shown) on the other end of the sound-proof material 61.

6 , when the first sound-proof cover 60 is attached to the horizontal pipe connection portion 42, the sound-absorbing material 62 contacts both sides of the horizontal pipe connection portion 42 in the axial direction of the horizontal pipe 20. Moreover, the sound-absorbing material 62 is not provided in the radial direction of the horizontal pipe connection portion 42, and the sound-proof material 61 contacts the horizontal pipe connection portion 42 directly.
7 , if the sound absorbing material 62 is provided over the entire range of the sound insulating material 61 in the short direction, when the sound absorbing material 62 is attached to the horizontal pipe connecting portion 42, the sound absorbing material 62 deforms along the horizontal pipe connecting portion 42. As a result, the first sound insulating cover 60 becomes bulged in the radial direction near the horizontal pipe connecting portion 42.

In this case, for example, as shown in FIG. 1, if the horizontal pipe connection part 42 is provided near the floor slab S, the workability of the first sound insulation cover 60 will be poor. Or, the space will be insufficient to install the first sound insulation cover 60. That is, by providing the sound absorbing material 62 at intervals in the short side direction in the first sound insulation cover 60, the first sound insulation cover 60 can be installed without expanding in the radial direction, as shown in FIG. 6. In addition, the horizontal pipe connection part 42 has a larger radial plate thickness than, for example, the horizontal pipe 20 and the water collection chamber 44. Therefore, the drainage sound is less likely to be transmitted to the outside than the part where the sound absorbing material 62 is in contact. Therefore, by providing the sound absorbing material 62 by avoiding the horizontal pipe connection part 42 using the first sound insulation cover 60 having a concave shape in the short side direction, workability is improved while sound insulation is ensured.

As shown in Fig. 8, when attaching the second sound-insulating cover 70 to the step 31, the sound-absorbing material 72 is placed on the inside and the strip-like longitudinal direction is wrapped around the periphery. At this time, when the end of the sound-insulating material 71 is exposed over the entire range in the lateral direction as shown in Fig. 5, after wrapping the second sound-insulating cover 70, one end of the sound-insulating material 71 is overlapped on the other end and fixed.
After wrapping the second sound-proof cover 70, a cable tie or tape is wrapped around the periphery to secure it in place. Also, when the end of the sound-proof material 71 is exposed over the entire range in the short direction as shown in Fig. 5, a hook-and-loop fastener 73 may be provided on the exposed portion and attached to a hook-and-loop fastener (not shown) on the other end of the sound-proof material 71.

8 , when the second sound-proofing cover 70 is attached to the step 31, the sound-absorbing material 72 enters and contacts the step 31 in the axial direction of the connecting pipe 30. Furthermore, the sound-absorbing material 72 is not provided at the portions contacting the end of the collective joint 40 and the end of the leg joint 50, and the sound-proofing material 71 directly contacts the end of the collective joint 40 and the end of the leg joint 50.
9, if the sound absorbing material 72 is provided over the entire range of the sound insulation material 71 in the short direction, when the sound insulation material 71 is attached to the step 31, the sound absorbing material 72 contacts only the end of the collective joint 40 and the end of the leg joint 50, and the sound absorbing material 72 does not deform along the step 31. As a result, the thickness of the sound absorbing material 72 is added to the diameter of the leg joint 50, and the second sound insulation cover 70 appears to cover and hide the step 31.

In this case, for example, if the leg joint 50 is provided near the wall under the floor, the workability of the second sound insulation cover 70 will be poor. Or, the space will be insufficient and the second sound insulation cover 70 will not be able to be installed. That is, by providing the sound absorbing material 72 in the center of the short side direction in the second sound insulation cover 70, as shown in FIG. 8, the second sound insulation cover 70 can be installed without adding the thickness of the sound absorbing material 72 to the end of the leg joint 50. In addition, the collective joint 40 and the leg joint 50 have a larger radial plate thickness than the connecting pipe 30. Therefore, drainage sound is less likely to be transmitted to the outside than the part where the sound absorbing material 72 is in contact. Therefore, by providing the sound absorbing material 72 so as to be in close contact with the step 31 by the second sound insulation cover 70 having a convex shape in the short side direction, workability is improved while sound insulation is ensured.

The above-mentioned first sound-insulating cover 60 and second sound-insulating cover 70 can be appropriately selected according to the shape and application of the mounting portion. Alternatively, only one of them or both of them may be used in the piping structure 100. When both of them are used, a wider range can be sound-insulated, so that it is expected that the sound insulation of the entire piping structure 100 can be ensured.
Furthermore, it may be provided integrally with a sound-insulating cover that covers the collective joint 40. Also, it may be provided separately from the sound-insulating cover and then laminated on the upper side or the lower side of the sound-insulating cover.

As described above, according to the first sound-insulating cover 60 of this embodiment, the sound-absorbing material 62 is provided at intervals on both ends in the short direction of the strip-shaped sound-insulating material 61. In other words, the first sound-insulating cover 60 has a step in the short direction such that the center is concave.
When this sound insulation cover is wrapped around a flange portion F (a convex step) generated at the connection between the collective joint 40 and the horizontal pipe 20, for example, the sound absorbing material 62 provided at both ends in the short direction of the first sound insulation cover 60 contacts both sides of the flange portion F in the axial direction of the horizontal pipe 20 so as to sandwich the flange portion F. In addition, no sound absorbing material 62 is provided at the portion where the flange portion F and the first sound insulation cover 60 contact in the radial direction of the horizontal pipe 20, and the sound insulation material 61 contacts the flange portion F directly.

Here, if the sound absorbing material 62 is provided at the portion in contact with the flange portion F, when the first sound insulating cover 60 is wrapped around the flange portion F, the sound absorbing material 62 deforms along the flange portion F. That is, the entire first sound insulating cover 60 becomes bulging in the radial direction near the flange portion F. That is, the ability to conform to the convex step portion becomes poor.
Therefore, by making the portion of the first sound insulating cover 60 that comes into contact with the flange portion F (the central portion in the short direction of the first sound insulating cover 60) have a concave shape, it is possible to prevent the first sound insulating cover 60 from becoming bulging in the vicinity of the flange portion F. In other words, it is possible to ensure that the shape of the first sound insulating cover 60 conforms to the flange portion F.
This makes it possible to provide the first sound-proof cover 60 even in cases where, for example, the distance between the edge of the flange portion F and the wall of the installation location is narrow and a sufficient space cannot be secured. In other words, the installation workability can be improved.

Moreover, according to the second sound-insulating cover 70 of this embodiment, the sound-absorbing material 72 is attached only to the center portion in the short-side direction of the strip-shaped sound-insulating material 71. In other words, the second sound-insulating cover 70 has a step 31 in which the center portion is convex in the short-side direction.
For example, when the second sound-insulating cover 70 is wrapped around a concave step 31 that occurs at the connection between the leg joint 50 and the vertical pipe 10 that has a smaller diameter than the leg joint 50, the sound-absorbing material 72 provided in the center of the short side of the second sound-insulating cover 70 enters and comes into contact with the concave step 31. In addition, the sound-absorbing material 72 is not provided at the portion where the second sound-insulating cover 70 contacts the end of the leg joint 50 and the end of the vertical pipe 10, and the sound-insulating material 71 comes into direct contact with the end of the leg joint 50 and the end of the vertical pipe 10.

Here, if the sound-absorbing material 72 is provided at the portion contacting the end of the leg joint 50 and the end of the vertical pipe 10, when the second sound-insulating cover 70 is wrapped around the concave step 31, the sound-absorbing material 72 contacts only the end of the leg joint 50, and the sound-absorbing material 72 does not deform along the vertical pipe 10. In other words, the thickness of the sound-absorbing material 72 is added to the diameter of the leg joint 50, and the second sound-insulating cover 70 takes a shape that covers and hides the recess. In other words, the ability to conform to the concave step 31 becomes poor.
Therefore, by making the portion in contact with the concave step 31 (the center portion in the short direction of the second sound-proof cover 70) into a convex shape, it is possible to prevent the thickness of the sound-absorbing material 72 from being added to the end portion of the leg joint 50. Furthermore, it is possible to efficiently bring the sound-absorbing material 72 into close contact with the recess. In other words, it is possible to ensure the shape of the sound-absorbing material 72 conforms to the concave step 31.
This makes it possible to provide the second sound-proof cover 70 even when, for example, the distance between the leg joint 50 and the wall of the installation location is narrow and a sufficient space cannot be secured. In other words, the installation workability can be improved.

The sound insulation covers 60, 70 are fixed to match the shape of the step (flange portion F or step 31). This prevents the sound absorbing material 62, 72 from impairing the conformability of the sound insulation covers 60, 70. In other words, even in a narrow installation location, the sound insulation covers 60, 70 can be installed easily while ensuring sound insulation.

Moreover, the sound insulation covers 60, 70 according to the present application are intended to cover only the periphery of the step portion of the piping component. If the entire piping component including the step portion were to be covered with one sound insulation cover 60, 70, the sound insulation cover 60, 70 would become large and its shape would become even more complicated.
That is, by providing the sound insulation covers 60, 70 for the purpose of covering only the periphery of the step portion, it is possible to reduce the area and simplify the shape, and therefore the cost of the sound insulation covers 60, 70 can be reduced.

Further, the sound insulating covers 60, 70 are fixed so that the sound absorbing materials 62, 72 come into contact with the pipe components while avoiding stepped portions.
This allows the sound absorbing materials 62, 72 to be in close contact with the piping components while avoiding the step portion. This allows the sound generated by drainage flowing through the pipe to be absorbed. In addition, the sound insulation materials 61, 71 are provided on the outside of the sound absorbing materials 62, 72, so that the above-mentioned sound can be prevented from leaking to the outside. Here, the step portion (for example, the flange portion F or the end of the leg joint 50) where the sound absorbing materials 62, 72 do not come into contact is relatively thicker than the portion where the sound absorbing materials 62, 72 come into contact. Therefore, sound is less likely to be transmitted to the outside than the portion where the sound absorbing materials 62, 72 come into contact. Therefore, sound insulation can be ensured simply by covering with the sound insulation materials 61, 71.
In other words, even in a construction location with a small space, the sound-insulating covers 60, 70 can be easily installed while ensuring sound insulation.

The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, three or more sound absorbing materials 62 may be provided at intervals in the short side direction of the first sound insulating cover 60 in the central portion in the short side direction, or only one may be provided at one end portion in the short side direction.
Furthermore, the sound absorbing material 72 does not have to be located in the center as long as the sound insulating material 71 is exposed at both ends in the short side direction of the second sound insulating cover 70 .
Furthermore, the sound absorbing material 62 and the sound absorbing material 72 may be provided at intervals in the longitudinal direction of the first sound insulating cover 60 and the second sound insulating cover 70 .
The hook-and-loop fasteners 63 and 73 provided at the longitudinal ends of the sound-insulating material 61 and the sound-insulating material 71 may be made of double-sided tape.

In addition, the components in the above embodiment may be replaced with well-known components as appropriate without departing from the spirit of the present invention, and the above-mentioned modifications may be combined as appropriate.

60 First sound-insulating cover 61 Sound-insulating material 62 Sound-absorbing material 70 Second sound-insulating cover 71 Sound-insulating material 72 Sound-absorbing material 100 Piping structure

Claims (3)

A strip of sound-proofing material;
A sound absorbing material is laminated on the sound insulating material and provided along the longitudinal direction of the sound insulating material;
Equipped with
The sound absorbing material is a sound insulating cover provided at intervals in the short side direction of the sound insulating material,
The sound-insulating cover is wrapped around the piping component in the longitudinal direction of the sound-insulating material.
Soundproof cover. A piping component having a step portion formed on an outer surface thereof;
The sound insulating cover according to claim 1 ;
Equipped with
The sound-insulating cover is fixed in accordance with the shape of the step portion.
Piping structure. A method for installing a sound-insulating cover on a piping component having a step portion formed on an outer surface thereof, comprising:
The sound-insulating cover according to claim 1 is fixed so that the sound-absorbing material is in contact with the stepped portion of the piping component while avoiding the stepped portion.
How to install soundproofing covers.

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