JP2009257562A - Acoustic isolation sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an acoustic isolation sheet by which soundproof processing can be practiced for an existing drainpipe and besides sound leak can be prevented. <P>SOLUTION: There is provided an acoustic isolation sheet 1 for coating drain pipes 5, 6 to cut sound due to draining water. The acoustic isolation sheet 1 includes a sheet-like acoustic isolation layer 3, an acoustic absorption layer 2 which is elastic and platy, surface fasteners 4a, 4b for making opposite surfaces of two members abut on each other. The acoustic absorption layer is mechanically or thermally integrated with one surface of the acoustic isolation layer. In the surface fastener, one member 4a and the other member 4b are integrated with one surface of the acoustic isolation layer and the other surface thereof, respectively. After being wound around the drainpipe, one member of the surface fastener and the other member thereof are allowed to contact each other for fixing. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sound insulation sheet that shields drainage sound from drainage piping in a building.

In collective housing, domestic wastewater is collected from the upper floor and sent to the lower floor. In apartments, the drainage noise is loud because the head of the drainage channel is large, making it uncomfortable for those living on the lower floors. The sound of drainage emitted from drainage pipes in a quiet night is particularly annoying.
Therefore, various sound insulation materials for shielding the drainage sound from the drainage pipe have been developed and proposed. For example, Patent Document 1 discloses that the outer periphery of a drain pipe is covered with glass wool as a sound absorbing material, the outer periphery of the sound absorbing material is covered with a sound insulating material formed of a metal thin film or a polymer material, and the outer periphery of the sound insulating material is a heat-shrinkable film. A soundproof tube coated with is described. Patent Document 2 describes a soundproof sheet body having a two-layer structure of a sound absorbing layer made of needle felt and a sound insulating layer made of soft vinyl chloride resin for winding around a drain pipe. This soundproof sheet body is fixed to two end portions that are wound and overlapped with a snap button provided in the length direction after being wound around a drain pipe.
JP 2006-308071 A JP 2008-8340 A

In the soundproof tube described in Patent Document 1, a sound absorbing material having soundproof performance is integrated with the drainage pipe from the beginning, and it is not possible to perform a soundproofing treatment on the drainage pipe already constructed.
In that respect, since the soundproof sheet body described in Patent Document 2 can be applied later to the drainage pipe constructed, it is possible to perform a soundproofing process on the existing drainage pipe.
However, since the soundproof sheet body described in Patent Document 2 is fixed by snap buttons provided at intervals after being wound around the drainage pipe, there is no gap in the overlapping of both end portions between the snap buttons. There is a concern of sound leakage.

  This invention is made | formed in view of the above-mentioned problem, and it aims at providing the sound insulation sheet | seat which can perform soundproofing processing to the existing drain piping, and a sound leak is prevented.

The sound insulation sheet according to the present invention is a sound insulation sheet composed of a plurality of layers that covers piping and shields sound, and has an extended portion consisting of only an outer skin layer that extends from the inner layer at one end. The inner surface of the outer skin layer has a belt-like first overlapping portion region and a belt-like first joint region, and the outer surface of the outer skin layer at the other end has a belt-like second overlapping portion region and a belt-like second region. A junction region.
The sound insulation sheet can be joined even if the overlapping position is slightly shifted by providing the belt-like first joint part and the belt-like second joint part, and it can be joined to various pipes having the same nominal diameter but different outer diameters. In contrast, a joining allowance can be obtained that can be covered with a margin.

  Another sound insulation sheet according to the present invention is a sound insulation sheet that covers drainage piping and shields drainage sound, and includes a sheet-like sound insulation layer, a flexible plate-like sound absorption layer, and two members. A surface fastener that is brought into contact with each other at the corresponding surfaces, the sound absorbing layer is integrated with one surface of the sound insulation layer by a mechanical or thermal method, and the surface fastener has one member The other member is integrated with one surface of the sound insulation layer on the other surface of the sound insulation layer by a mechanical or thermal method, and after being wound around the drain pipe, The other member is contacted and fixed.

Preferably, the mechanical method is a method of sewing by sewing.
Preferably, the sound insulation layer is made of a soft vinyl chloride resin, and the sound absorption layer is made of a soft urethane resin.
More preferably, each of the sound insulation layer and the sound absorption layer is a quadrilateral and is integrated by aligning two orthogonal sides, and at least one of the two orthogonal sides aligned in the sound insulation layer is the The sound absorbing layer is formed longer than the side of the sound absorbing layer aligned with one of the two sides, and one member of the surface fastener is a surface of the sound insulating layer on which the sound absorbing layer is integrated, and It is integrated with the sound insulation layer so as to extend perpendicular to one of the two sides in a portion not overlapping the sound absorption layer on the side formed longer than the side.

  Another sound insulation sheet according to the present invention is a sound insulation sheet formed of an outer skin layer and an inner layer that covers piping and shields sound, and extends from the inner layer to one end and includes the outer skin layer. Has an extension portion composed of a thin layer, and has a first overlapping portion region and a first joint portion region on the inner surface of the extending portion, and a second overlapping portion region on the outer surface of the outer skin layer at the other end. And a second junction region.

  ADVANTAGE OF THE INVENTION According to this invention, the sound insulation sheet | seat which can perform a soundproofing process to the existing drain piping, and a sound leak is prevented can be provided.

1 is a front view of the sound insulation sheet 1, FIG. 2 is a back view of the sound insulation sheet 1, and FIG. 3 is a cross-sectional view taken along the line AA in FIG.
1 to 3, the sound insulating sheet 1 includes a sound absorbing layer 2, a sound insulating layer 3, surface fasteners 4a and 4b, and the like. The size of the sound insulating sheet 1 varies depending on the material and outer diameter of the pipe to be attached. The sound insulation sheet 1 shown in FIGS. 1 to 3 is attached to a vinyl chloride resin pipe used for a standing pipe, and its dimensions are, for example, a length of 1350 mm and a width of 500 mm.

  The sound absorbing layer 2 is formed of a rectangular plate-like material that is formed so as to have an appropriate gap and has flexibility. The outer diameter of pipe materials used for building drainage pipes is standardized by materials such as cast iron and vinyl chloride resin, and the short side of the sound absorbing layer 2 is outside of each pipe material (drainage pipe) to be attached. The thing of the length substantially equal to a diameter is prepared. In the sound insulating sheet 1, the sound absorbing layer 2 is formed of a soft urethane resin. The sound absorbing layer 2 can be formed of a recycled material of soft urethane foam, glass wool, rock wool, ceramic fiber, cellulose fiber, needle punch mat, or the like.

The sound insulation layer 3 is a rectangular sheet such as a flexible synthetic resin or synthetic rubber. The sound insulating layer 3 has a long side substantially the same as the long side of the sound absorbing layer 2 and a short side longer than the sound absorbing layer 2. The sound insulation layer 3 has a strength that does not break during normal handling. The sound insulation layer 3 is made of a soft vinyl chloride resin. The sound insulation layer 3 can be formed of other flexible materials, that is, a sheet-like material that is easily bent and bent, such as an asphalt sheet, an olefin resin sheet, a soft sheet containing an iron-based filler, and the like.
The hook-and-loop fasteners 4a and 4b are members having a function of being integrated when the respective surfaces are overlapped and being separated into two by peeling off the integrated ones. In the sound insulating sheet 1, Velcro (registered trademark) is used. Moreover, the hook_and_loop | surface fastener which has another similar function can be used.

  In the sound insulating sheet 1, the sound absorbing layer 2, the sound insulating layer 3, and the hook-and-loop fasteners 4a and 4b are sewn together by sewing. The sound absorbing layer 2 and the sound insulating layer 3 are overlapped with both short sides and one long side thereof aligned. In the vicinity of the other long side of the sound insulating layer 3, there is an extending portion 33 that does not overlap the sound absorbing layer 2. One of the hook-and-loop fasteners 4a and 4b is overlapped with the sound absorbing layer 2 at the extending portion 33 on the side of the sound insulating layer 3 that is not aligned with the end of the sound absorbing layer 2 (the side that does not overlap the sound absorbing layer 2). It is sewn on the surface (inner surface) on the other side in a strip shape over the length direction of the long side. This band-like region is referred to as a first joint region 29. Further, the one surface fastener 4 a is disposed with an interval of 20 to 50 mm from the end of the sound absorbing layer 2. The single-layer region of the band-shaped sound insulation layer is defined as a first overlapping portion region 30.

The other surface fastener 4b has a long side on the surface (outer surface) opposite to the surface on which the sound absorbing layer 2 in the vicinity of the long side opposite to the side where the surface fastener 4a is disposed in the sound insulating layer 3 is overlapped. It is sewn in a strip shape over the entire length. This band-like region is referred to as a second joint region 31. The other surface fastener 4b is arranged with an interval of 20 to 50 mm from the end of the sound absorbing layer 2. This band-like region is referred to as a second overlapping portion region 32.
Note that the hook-and-loop fasteners 4a and 4b are sewn to the sound-insulating sheet 3 with their joint surfaces outward.

Next, the manufacturing process of the sound insulation sheet 1 will be described.
First, the hook-and-loop fasteners 4 a and 4 b are sewn to the sound insulation layer 3. Reference numerals 21, 22, and 23 in FIGS. 1 to 3 denote seams. The hook-and-loop fastener 4b is sewn only at one seam 21 (one side).
Subsequently, the sound absorbing layer 2 and the sound insulating layer 3 are stitched together. Reference numerals 24, 25, and 26 in FIGS. 1 to 3 denote stitches. When the sound absorbing layer 2 and the sound insulating layer 3 are sewn together, the other side of the hook-and-loop fastener 4b is sewn.

FIG. 4 is a view showing a state in which the sound insulating sheet 1 is applied to the drain pipe, and FIG. 5 is a cross-sectional view taken along the line BB in FIG.
In FIG. 4, the sound insulation sheet 1 covers from directly under the fire spread prevention device 7 attached to the lower end of the drainage collecting pipe 6 on the upper floor to immediately above the drainage collecting pipe 6 on the lower floor. The fire spread prevention device is composed of a thermally expandable refractory material and a fire spread prevention member described in Japanese Patent Application No. 2007-047801.
The sound insulation sheet 1 is wound around the vertical pipe 5 so that the longitudinal direction of the hook-and-loop fasteners 4a and 4b is the axial direction of the pipe. The wound sound insulation sheet 1 is attached to the standpipe 5 with the hook-and-loop fasteners 4a and 4b coming into contact with each other.

The length of the sound insulation sheet 1 is prepared to be a fixed length, and a plurality of sound insulation sheets 1 and 1 are used when the standpipe 5 as shown in FIG. The sound insulation sheet 1 is cut and used for sound insulation of a portion shorter than the length of the fixed sound insulation sheet 1. Opposing end portions of adjacent sound insulating sheets 1 and 1 are connected with an adhesive tape 8 or the like as necessary.
The sound insulating sheet 1 is used in which the length of the short side of the sound absorbing layer 2 is substantially equal to the outer diameter of the riser 5 to which the sound absorbing layer 2 is attached. It will be in the state where the parts faced each other. That is, since the sound insulation sheet 1 is attached in a state where the sound absorbing layer 2 is in contact with the entire circumference of the vertical pipe 5, the clearance between the vertical pipe 5 causing sound leakage, the gap between the ends of the sound absorption layer 2, and the sound insulation. The gap between the overlapping portions of the layers can be minimized. The portion where the one surface fastener 4a is not sewn in the extending portion 33 consisting only of the sound insulating layer 3 (referred to as "first overlap portion region 30") is on the side where the other surface fastener 4b is sewn in the sound insulating layer 3. It can be overlapped with a sufficient width and relatively close contact. Furthermore, since both ends are closed by the strip-shaped surface fasteners 4a and 4b over the entire length of the sound insulating sheet 1, there is a possibility that it will be generated when the snap button is closed, and there is no gap that causes sound leakage.

The sound insulation sheet 1 can be similarly applied to a drain pipe that does not have the fire spread prevention device 7. In this case, the sound insulating sheet 1 is wound around a vertical pipe 5 from directly below the drainage collecting pipe 6 on the upper floor Fu to immediately above the drainage collecting pipe 6 on the lower floor Fd.
FIG. 6 is a view showing a state in which the pipes 5 and 5 connected by the joint 9 are constructed.
The exposed portions of the vertical pipes 5 and 5 are covered and covered with the sound insulating sheets 1 and 1 in the same manner as described above. The entire outer surface of the joint 9 is covered with a sound insulating sheet 1B having a sound absorbing layer 2 having a short side substantially equal to or longer than the maximum outer circumference of the joint 9 and cut to a required length. The sound insulation sheet 1B covering the joint 9 is different from the sound insulation sheets 1 and 1 covering the vertical pipes 5 and 5 only in the size of the sound absorbing layer 2 and the sound insulation layer 3, and the structure of the material and the like is the same. . The sound insulation sheet 1B covers the end portions of the sound insulation sheets 1 and 1 attached to the vertical pipes 5 and 5, and both ends of the sound insulation sheet 1B are band 10 so that no gap is formed between the sound insulation sheets 1 and 1. 10 is tightened.

The sound insulation sheets 1 and 1B are not limited to the vertical pipes 5 and the joints 9 and can be widely applied to pipe materials used as drain pipes such as horizontal branch pipes.
7 is a front view of the sound insulation sheet 1C for the drainage collecting pipe 6, FIG. 8 is a back view of the sound insulation sheet 1C, and FIG. 9 is a cross-sectional view taken along the line CC in FIG.
The sound insulating sheet 1C includes a sound absorbing layer 2C, a sound insulating layer 3C, and hook-and-loop fasteners 4Ca and 4Cb. The sound insulation sheet 1C is prepared in various lengths and widths depending on the connection type (flange connection, plug connection, etc.) and the size of the drainage collecting pipe 6 and the vertical pipe 5 to be attached.

Similar to the sound absorbing layer 2 in the sound insulating sheet 1, the sound absorbing layer 2C is formed of a flexible rectangular plate-like material formed by intertwining fibers so as to have an appropriate gap. Glass wool is used for the sound absorbing layer 2C. As the sound absorbing layer 2C, soft urethane resin or other materials listed above in the description of the sound absorbing layer 2 may be used.
The sound insulation layer 3 </ b> C is a rectangular sheet such as a flexible synthetic resin or synthetic rubber. The sound insulating layer 3C has a longer side and a shorter side both longer than the sound absorbing layer 2C. The sound insulation layer 3C has a strength that does not break under normal handling, and is made of a soft vinyl chloride resin. As the sound insulation layer 3C, other materials listed above in the description of the sound insulation layer 3 may be used.

The hook-and-loop fasteners 4Ca and 4Cb are the same as the hook-and-loop fasteners 4a and 4b used in the sound insulating sheet 1.
The sound absorbing layer 2C, the sound insulating layer 3C, and the hook-and-loop fasteners 4Ca and 4Cb are formed on the sound insulating sheet 1C by sewing together with a sewing machine. Referring to FIG. 7, the sound absorbing layer 2 </ b> C and the sound insulating layer 3 </ b> C are overlapped and stitched together with one of their long sides and one of their short sides aligned. A hook-and-loop fastener 4Ca is sewn in parallel to the short side of the sound absorbing layer 2C at a portion of the sound insulating layer 3C where the sound absorbing layer 2C at the end in the longitudinal direction is not overlapped. Since the surface fasteners 4Ca and 4Cb have irregularities on the surface of the drainage collecting pipe 6, the width of the hook-and-loop fasteners 4Ca and 4Cb is wider than that of the sound insulating sheet 1 in order to provide flexibility in attachment.

  One hook-and-loop fastener 4Ca is arranged with a short distance from the short side of the sound absorbing layer 2C, one end thereof is aligned with the long side where the sound absorbing layer 2C and the sound insulating layer 3C are aligned, and the other end is the sound absorbing layer 2C. It is aligned with the extension line of the other long side. The other hook-and-loop fastener 4Cb is sewn in parallel with the short side in the vicinity of the short side aligned with the short side of the sound absorbing layer 2C on the surface of the sound insulating layer 3 opposite to the surface on which the sound absorbing layer 2C is superimposed. Yes. Similarly to the one surface fastener 4Ca, the other surface fastener 4Cb also has one end aligned with the aligned long side of the sound absorbing layer 2C and the sound insulating layer 3C, and the other end positioned at the other long side of the sound absorbing layer 2C. Aligned.

A plurality of cuts (slits) 12C,..., 12C extending in the width direction are provided at equal intervals in the longitudinal direction in a portion of the sound insulation layer 3C where the sound absorption layer 2C in the width direction is not overlapped. The portion provided with the cuts 12C, ..., 12C is referred to as a slit portion 13C.
The sound insulation sheet 1 </ b> C is manufactured in substantially the same process as the sound insulation sheet 1.
First, the hook-and-loop fasteners 4Ca and 4Cb are sewn to the sound insulation layer 3C. 7 to 9, reference numerals 21, 22, and 23 denote stitches. The hook-and-loop fastener 4Cb is sewn only at one seam 21 (one side).

Subsequently, the sound absorbing layer 2C and the sound insulating layer 3C are stitched together. Reference numerals 24, 25, and 26 in FIGS. 7 to 9 denote stitches. When the sound absorbing layer 2C and the sound insulating layer 3C are stitched together, the other side of the hook-and-loop fastener 4Cb is sewn.
FIG. 10 is a view showing a state in which the sound insulating sheet 1 </ b> C is attached to the drainage collecting pipe 6.
The drainage collecting pipe 6 shown in FIG. 10 has a fire spread prevention device 7 attached to the lower end thereof. Moreover, the sound insulation sheet 1 demonstrated previously is attached to the standing pipe 5 of the drainage piping shown by FIG.

10, the same reference numerals as those in FIG. 4 have the same configuration as the drainage pipe and the sound insulation sheet 1 shown in FIG. 4.
The sound insulation sheet 1C protrudes from the floor slab 11 to the lower floor Fd in a state where the long side where the cuts 12C, ..., 12C are not provided is in contact with the lower surface of the floor slab 11 in which the drainage collecting pipe 6 is embedded. Wrapped around the drainage collecting pipe 6 and the outer periphery of the fire spread prevention device 7.
In the sound insulating sheet 1C, one surface fastener 4Ca and the other surface fastener 4Cb are brought into contact with each other. At this time, since the surface fasteners 4Ca and 4Cb have a wide width, both ends of the sound insulation sheet 1C wound in accordance with the unevenness of the drainage collecting pipe 6 and the fire spread prevention device 7 can be brought into contact with each other, and the falling off is prevented. Note that the sound insulation sheet 1C has a distance between the long sides facing each other, that is, the width of the sound absorption layer 2C, that is sufficient to cover the lower portion of the protruding drainage collecting pipe 6 and the fire spread prevention device 7. Is used. Therefore, the slit portion 13 </ b> C of the sound insulating sheet 1 </ b> C protruding from the sound absorbing layer 2 </ b> C overlaps the sound insulating sheet 1.

The sound insulation sheet 1C is reliably prevented from falling off the drainage collecting pipe 6 by an appropriate position near the lower surface of the floor slab 11 and the bands 14Ca and 14Cb attached to the outer periphery of the sound insulation layer 3C in the slit portion 13C. At this time, the slit portion 13C overlapping the sound insulating sheet 1 is squeezed by overlapping the adjacent portions across the slits 12,..., 12 and can be tightened by the band 14Cb.
The sound insulation sheet 1C can be similarly attached to the drainage collecting pipe 6 to which the fire spread prevention device 7 is not attached.

Since the sound insulation sheet 1C can completely cover the lower portion of the drainage collecting pipe 6 protruding from the floor slab 11 to the lower floor Fd, the drainage sound generated in the drainage collecting pipe 6 can be efficiently blocked. The hook-and-loop fasteners 4Ca and 4Cb that continuously close one end and the other end of the sound insulating sheet 1C and do not generate a gap that causes sound leakage greatly contributes to blocking the lower portion of the drainage collecting pipe 6.
By using the hook-and-loop fasteners 4a, 4b, 4Ca, and 4Cb, the sound insulating sheets 1 and 1C can be easily and reliably wound without any gaps in the entire range of the mating surfaces. Moreover, the sound insulation sheet 1 can be applied to various floor heights with one standard size by cutting according to the floor height of the building. Moreover, it can respond also to the joint 9 in the middle of a straight pipe by cut | disconnecting the sound-insulation sheet | seat 1. FIG. And since it closes with the hook-and-loop fastener 4a, 4b even when the sound-insulation sheet | seat 1 is cut | disconnected, it can be reliably fitted and fastened from a cut part.

The sound insulation sheets 1 and 1C use hook-and-loop fasteners 4a, 4b, 4Ca, and 4Cb, and can be freely attached to and detached from the drainage pipe, so that it is easy to confirm damage such as cracks in the vertical pipe 5 and the like with time. In addition, if the drain pipe such as the vertical pipe 5 is constructed with a transparent polyvinyl chloride pipe, for example, it is easy to check the degree of dirt in the pipe, and when the pipe is washed, the finish of the washing is easily confirmed. be able to.
The sound insulation sheets 1, 1 </ b> C can be easily attached to the drainage pipe after construction if the drainage sound that was not bothered by the beginning is worrisome due to an increase in residents on the upper floor.

FIG. 11 is a front view of another sound insulation sheet 1D.
The sound insulating sheet 1D is a belt-like one in which the one surface fastener 4a in the sound insulating sheet 1 described above is continuous, whereas a short short surface fastener 41D having a short length has a plurality of intervals 1 The hook-and-loop fastener 4Da is formed in a row. The surface fastener 4D is a surface of the sound insulating layer 3 on the side where the sound absorbing layer 2 is overlapped with the extending portion 33 on the side not aligned with the end of the sound absorbing layer 2 (the side not overlapping the sound absorbing layer 2). (Inner surface) is sewn in a row over the length direction of the long side.

The description of the sound insulation sheet 1D having the same configuration as that of the sound insulation sheet 1 is omitted, and the same reference numerals as those in the sound insulation sheet 1 are given in FIG.
FIG. 12 is a back view of another sound insulating sheet 1E.
In the sound insulating sheet 1E, one surface fastener 4Eb sewn together with the sound absorbing layer 2 and the sound insulating layer 3 on the surface (outer surface) opposite to the surface on which the sound absorbing layer 2 in the vicinity of the long side overlaps is changed in width in the longitudinal direction. That is, it differs from the sound insulation sheet 1 described above in that the width increases from one end to the other end. In other points, the sound insulation sheet 1E is the same as the sound insulation sheet 1, and those having the same configuration as the sound insulation sheet 1 in FIG.

FIG. 13 is a view corresponding to a cross section taken along line BB in FIG. 4 of another sound insulating sheet 1F.
The width of the sound insulation sheet 1F is larger than either or both of the hook-and-loop fasteners 4Fa and 4Fb. Therefore, there is a degree of freedom in the inner diameter when both hook-and-loop fasteners 4Fa and 4Fb are joined, and the outer surface of the vertical pipe 5 having a standard dimension is subjected to some processing and the outer diameter is apparently increased, or the outer diameter is It can be attached to a slightly larger non-standard vertical pipe 5.
In addition, when the sound insulation sheet 1F is wound around the vertical pipe 5 having a large outer diameter, the ends of the long sides of the sound absorbing layer 2 are not abutted with each other, and a slight gap is generated.

FIG. 14 is a view corresponding to a cross section taken along line BB in FIG. 4 of another sound insulating sheet 1G.
The sound insulating sheet 1G is different from the sound insulating sheet 1F in that the sound absorbing layer 2G is also sewn on the extending portion 33G. The thickness of the sound insulation layer 2G in the extending portion 33G is thinner than that of the sound insulation layer 2G in other portions. The sound insulation sheet 1G is overlaid on the extending portion 33G by sound leakage from the gap between both ends of the long side of the sound absorbing layer 2 that is generated when the sound insulation sheet 1F is wound around the vertical pipe 5 having a large outer diameter. It can be reduced by the sound insulation layer 2G.
FIG. 15 is a cross-sectional view of another sound insulation sheet 1H for the drainage collecting pipe 6 corresponding to the CC arrow in FIG.

The surface fastener 4Ha sewn in parallel to the short side of the sound absorbing layer 2C on the portion of the sound insulating sheet 1H where the sound absorbing layer 2C at the end in the longitudinal direction of the sound insulating layer 3C is not overlapped has the width L1 of the other side. It is about twice as large as the width L2 of the hook-and-loop fastener 4Cb. For this reason, the widths of the first joint region 29H and the extending portion 33H are larger than those of the sound insulating sheet 1C.
In this way, by increasing the width L1 of the hook-and-loop fastener 4Ha, for example, it is possible to flexibly cope with the drainage collecting pipe 6 in which the size of the outer circumference is slightly increased by providing a cleaning hole or the like. Become.

In the above-described embodiment, the attachment of the hook-and-loop fasteners 4a, 4Ca, 4Da, 4Fa, 4Ha, 4b, 4Cb, 4Eb, and 4Fb to the sound insulation layers 3, 3C, and 3F is not performed by sewing with a sewing machine, but by other mechanical or heat. For example, an industrial stapler, a fastener, a smart pin (T-shaped end binding tool), and a hot melt putty can be used. The term “mechanical or thermal” as used herein is intended to exclude a joining method using an adhesive or the like that generates environmental hormone gas harmful to the human body.
In addition, each structure of the sound insulation sheets 1 and 1B to 1H and the sound insulation sheets 1 and 1B to 1H, or the overall structure, shape, dimensions, number, material, and the like can be appropriately changed in accordance with the spirit of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be used for shielding drainage sound from drainage pipes in buildings.

FIG. 1 is a front view of the sound insulation sheet. FIG. 2 is a rear view of the sound insulation sheet. 3 is a cross-sectional view taken along arrow AA in FIG. FIG. 4 is a view showing a state in which the sound insulation sheet is applied to the drain pipe. 5 is a cross-sectional view taken along the line BB in FIG. FIG. 6 is a view showing a state in which the pipe is connected to a vertical pipe connected by a joint. FIG. 7 is a front view of a sound insulation sheet for a drainage collecting pipe. FIG. 8 is a rear view of the sound insulation sheet for the drainage collecting pipe. 9 is a cross-sectional view taken along the line CC in FIG. FIG. 10 is a view showing a state in which the sound insulating sheet is attached to the drainage collecting pipe. FIG. 11 is a front view of another sound insulation sheet. FIG. 12 is a back view of another sound insulation sheet. FIG. 13 is a view corresponding to a cross section taken along line BB in FIG. 4 of another sound insulation sheet. FIG. 14 is a view corresponding to a cross section taken along line BB in FIG. 4 of another sound insulating sheet. 15 is a cross-sectional view of another sound insulation sheet for a drainage collecting pipe, corresponding to the CC arrow in FIG.

Explanation of symbols

1, 1B to 1H Sound insulating sheet 2, 2C, 2G Inner layer, sound absorbing layer 3, 3C, 3F Outer skin layer, sound insulating layer 4a, 4Ca, 4Da, 4Fa, 4Ha (for surface fastener) One member 4b, 4Cb, 4Eb, 4Fb The other member (of the hook-and-loop fastener) 5 Drainage pipe, drainage pipe (standing pipe)
6 Drainage pipes, drainage collecting pipes 29, 29H First junction area 30 First overlap area 31 Second junction area 32 Second overlap area 33, 33G, 33H Extension

Claims (4)

A sound insulation sheet consisting of a plurality of layers covering pipes and shielding sound,
At one end, it has an extending part that extends from the inner layer and consists only of the outer skin layer,
On the inner surface of the outer skin layer of the extending portion, it has a belt-like first overlapping portion region and a belt-like first joint region,
A sound insulation sheet comprising a band-shaped second overlapping region and a band-shaped second joint region on the outer surface of the outer skin layer at the other end. A sound insulation sheet that covers the drainage pipe and shields the drainage sound,
A sheet-like sound insulation layer;
A plate-like sound absorbing layer having flexibility;
A hook-and-loop fastener in which two members are brought into contact with each other on corresponding surfaces,
The sound absorbing layer is integrated with one surface of the sound insulating layer by a mechanical or thermal method,
In the surface fastener, one member is integrated with one surface of the sound insulation layer and the other member is integrated with the other surface of the sound insulation layer by a mechanical or thermal method,
After being wound around the drain pipe, one member and the other member of the hook-and-loop fastener are brought into contact with each other and fixed. The sound insulation layer is formed of a soft vinyl chloride resin,
The sound insulation sheet according to claim 2, wherein the sound absorbing layer is formed of a soft urethane resin. A sound insulation sheet formed of an outer skin layer and an inner layer that covers piping and shields sound,
One end has an extending portion that consists of a layer that extends from the inner layer and includes an outer skin layer that is thinner than the thickness of the inner layer,
On the inner surface of the extension part, it has a first overlapping part region and a first joint part region,
A sound insulation sheet comprising a second overlapping region and a second joint region on the outer surface of the outer skin layer at the other end.