JP3172446B2 - Piping soundproofing material and its construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe soundproofing material for preventing noise generated when an object passes through a pipe and preventing the vibration of the pipe, thereby preventing the pipe noise. The present invention relates to a soundproofing construction method in which anyone can easily construct the construction, and the same construction can be performed by anyone. INDUSTRIAL APPLICABILITY The present invention can be widely used for piping through which gas, solid, and liquid pass. Specifically, it can be suitably used as a blower duct, a transfer device for factory powder, granules, etc., a garbage shooter in an apartment house, a drain, water supply, a hot water supply pipe in a detached house, an office, an apartment house, and the like. . In particular, when there is a need to prevent sound or vibration, such as when sound passes through the pipe or when the pipe vibrates at a bend, etc. The effect is high when used widely.

[0002]

2. Description of the Related Art Hitherto, as a measure against sound and vibration of piping, there has been a method of making the piping itself heavy. For this purpose, a method of using a pipe made of iron or cast iron and a method of applying cement to the outer periphery of the pipe are known. According to this method, the sound transmission loss in the pipe increases. However, the pipe usually has a bent portion. In the bent portion, since the flow direction is forcibly changed, the bent portion is largely vibrated by an inevitably passing object, that is, the pipe itself vibrates. That is, since the pipe itself is a sound source, even if the weight of the pipe is increased, generation of sound cannot be prevented.

In an air duct or the like, a sound generated in a pipe is instantaneously determined by a method called active noise control, and a sound having an opposite phase to the sound is emitted from a speaker to attenuate the sound. However, this method is expensive and cannot deal with high-frequency sound unless the pipe diameter is large. In particular, when the pipe main body serves as a sound source, the vibration of the pipe itself cannot be suppressed, so that no effect is obtained. or,
There is a problem that it cannot be used for solids and liquids.

In addition, a sound absorbing material, a sound insulating material, a vibration damping material, and a vibration damping material are wound around or attached to a pipe. Since this method is very effective in preventing the sound in the pipe and the vibration of the pipe main body, the present inventor disclosed in Japanese Patent Application Laid-Open No. 1-1175 that a type that can be attached to the pipe was used. A pipe soundproofing material was proposed.

[0005]

The pipe soundproofing material and the method of construction thereof are extremely excellent in that the vibration of the pipe itself is significantly attenuated. However, as a result of further study by the present inventor, it has been found that the following problems are newly found from the viewpoint of construction. That is, when applying the sticking type of a sheet-like material or a member dedicated to a deformed portion, first, the entire pipes such as a straight pipe section, an elbow section, and a branch section are attached, and then along the outer peripheral surface of each pipe. It was necessary to attach a pipe soundproofing material. This is the same for any conventionally known pipe soundproofing materials.

However, in an actual construction site, there are many cases where a plumbing company and a pasting company are different. After the pipes have been installed, it is necessary to perform installation work on the pipe soundproofing material in a narrow space such as the pipe space or the space below the ceiling and the upper floor. Moreover, since wiring and the like other than the piping structure are also constructed at this site, it is difficult to secure a space necessary for the installation work of the pipe soundproofing material.

As a result, there are many cases where the pipe soundproofing material cannot be applied to the entire pipe, or where it is difficult for the worker to reach the location where the pipe soundproofing material is applied, and furthermore, forgetting to attach the joint tape occurs. sell.

[0008] An object of the present invention is to facilitate installation and installation of a pipe soundproofing material to a pipe, to secure a space necessary for the installation of the pipe soundproofing material, and to provide an excellent structure in a short time, no matter who works. Is to obtain a good finish.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a pipe soundproofing material to be installed on the outer periphery of a pipe, the layer comprising a material selected from a soundproofing material, a vibration-proofing material, a vibration-damping material and a sound-absorbing material. Are formed of a material having a combination of at least two layers, and this material is made of a material that can be deformed into a flat shape. When the pipe is inserted into the cylindrical material, the cylindrical material is tightly packed around the outer circumference of the pipe. Has an outer diameter such that it can be brought into contact with, and when the pipe is inserted into the tubular body, the inner peripheral surface of the tubular body can move without bonding to the outer periphery of the pipe, Of the respective layers constituting the cylindrical body, the end faces of the innermost layer are abutted and joined at one place, and a part of the outermost layer is overlapped at the overlapping portion, and joined. cage, in the overlapping portions, and a lower layer and an upper layer, the innermost layer is bonded position It is is superimposed in a different remote location
Tei Ru, which relates to a pipe soundproofing material.

Further, according to the present invention, when the pipe soundproofing material is installed, a straight pipe portion of the pipe is inserted inside the pipe soundproofing material, and the pipe soundproofing material is placed on the outer peripheral surface of the straight pipe portion in a pipe axial direction. And stopping at a predetermined position, and then attaching a pipe.

As a result of various trials and errors, the present inventor has found that a cylindrical member formed by combining at least two or more layers made of a material selected from a sound insulating material, a vibration isolating material, a vibration damping material, and a sound absorbing material. A pipe soundproofing material made in advance is made of a material which can be deformed into a flat shape, so that the pipe can be brought into close contact with the outer periphery of the pipe when the pipe is inserted into the pipe. A diameter dimension is given so that when the pipe is inserted into the tubular article, the inner peripheral surface of the tubular article can move without adhering to the outer periphery of the pipe. This pipe soundproofing material is used for the straight pipe part of the pipe, that is, the straight pipe part is inserted into the pipe soundproofing material, and the tubular object is slid in the pipe axis direction along the circumference of the straight pipe part to a predetermined position. By arranging the pipe, it is conceived that the installation of the pipe soundproofing material to the straight pipe section is completed before the pipe is mounted on the frame.

As a result, the work of attaching the soundproofing material to the pipe becomes extremely easy, the soundproofing material for the pipe can be easily installed over the entire pipe, the joint tape is not forgotten to be fixed, and even if anyone installs the soundproofing material for a short time, Now you can get excellent finish.

Here, in order to provide an outer diameter such that the cylindrical object can be brought into close contact with the outer periphery of the pipe when the pipe is inserted into the cylindrical object, the outer diameter of the pipe and the cylindrical object must be adjusted. Is preferably 20 mm or less, more preferably 10 mm or less.

Further, the inventor of the present invention attaches a deformed member having a shape conforming to the shape of the deformed portion to the deformed portion of the pipe, attaches a soundproofing material to the straight pipe portion of the pipe, and connects the straight pipe portion with the deformed portion. I thought of stopping the joint with the joint tape. As a result, before attaching the entire straight pipe portion and the deformed portion of the pipe to the frame, the pipe soundproofing material can be extremely easily applied to the entire pipe including the deformed portion.

The member for the deformed portion of the pipe can be (a) pre-attached to the deformed pipe material, or (b) a deformed member which is split into two or one in one so as to be in close contact with the deformed pipe. Which can be fitted on site to the profile.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the constituent materials of a tubular pipe soundproofing material and a pipe soundproofing material for a deformed portion will be described, and then a construction method will be described.

A tubular article is manufactured by combining at least two layers selected from a sound insulating material, a vibration damping material, a vibration damping material, and a sound absorbing material. The cylindrical object is deformed flat in a direction to crush it. In other words, it is a condition that the constituent material of the pipe soundproofing material of the present invention can be easily bent and restored when the straight pipe portion is inserted. This makes it possible to reduce the space required for transportation and storage when transporting and storing the tubular article.

The inside of the pipe soundproofing material must be able to move in the direction of the pipe axis of the straight pipe part while being in close contact with the outer peripheral surface of the straight pipe part. For this purpose, the material of each layer constituting the inner portion of the pipe soundproofing material must be a material that does not adhere to or adhere to the pipe and has low dynamic friction. Such materials include non-woven fabric, felt, woven fabric,
Needle punched carpet, flocking rubber, fibers of flocking plastic, etc., closed cells, open cells, objects having alternately convex portions of the closed cell structure and concave portions of the film only using two films, mesh-like objects, Rubber with irregularities on the surface; plastic; foam, rubber with a corrugated cross section in the shape of a single corrugated cardboard;

As the sound insulating material suitable in the present invention, a rubber sheet, a plastic sheet, and a metal sheet (thin as thin as possible in consideration of restorability) are preferably laminated with the rubber sheet or the plastic sheet.

As the vibration-proof material, a closed-cell sheet or a sheet having an uneven surface is suitable. A viscoelastic body can be used as the vibration damping material, and it is preferable to laminate the vibration damping material with a material having different stiffness as much as possible because a restraining effect occurs. Further, a vibration damping effect can be obtained by laminating the closed cell sheet or a sound absorbing material described later with other materials. In particular, the effect is obtained when the sound absorbing material is slightly compressed and used in close contact with the pipe. This is more effective in a straight pipe part than in a part where the flow in a pipe changes like a deformed part. It is more effective to make the deformed portion more firmly adhered with an adhesive or a viscoelastic body in order to reduce the vibration level. As the sound absorbing agent, a foam having a fiber diameter such as nonwoven fabric and felt and an open cell structure is preferable.

When the tubular body of the present invention is manufactured, it is preferable to join both ends of the sheet-like raw material. In this case, it is preferable to reduce the size of the gap between the seams. In this case, in particular, among the respective layers constituting the tubular body, the end faces of the innermost layer are joined at one place and joined, and the outermost layer is joined to the innermost layer. It is overlapped and joined at a position different from the existing position.
Thereby, the soundproofing performance is particularly improved.

In particular, when the pipe soundproofing material is provided with a vibration damping layer having a crosslinked viscoelastic material, foam, or closed cell, the crosslinked viscoelastic material, When a vibration damping layer provided with a body or a closed-cell body is overlapped, the entire thickness of the pipe soundproofing material becomes extremely large, and peeling is likely to occur at the overlapped portion. But,
When joining the end faces of the innermost layer in one place, the damping layer provided with a cross-linked viscoelastic body, foam, or closed cell body is also joined together by joining. Are not superimposed, problems such as peeling are less likely to occur.

However, in this case, a gap is likely to be formed in a joint portion of each layer, which may cause sound leakage. However, when the outermost layer is overlapped and joined at a position different from the position where the innermost layer is joined, sound leakage due to the gap is also prevented.

Further, in consideration of the construction, it is necessary that the pipe soundproofing material can be easily cut with scissors, a cutter knife or the like. Therefore, particularly when a metal sheet is used, the thickness is preferably 0.5 mm or less, and it is most suitable to use lead, copper, or aluminum. When a metal layer is provided, by providing the metal layer as much as possible on the outer peripheral side of the pipe soundproofing material, it becomes difficult for metal to buckle when a pipe is inserted into a tubular object, and the pipe is inserted. It will be easier.

It is most preferable that the deformed member be attached to the pipe in advance in terms of workability and soundproof performance. It is most preferable that the deformed portion of the pipe and the deformed member are set integrally and packed. Therefore, in order to construct the irregularly shaped member more quickly, it is desirable to split the spine in one place with an integrally molded product or split it into two to facilitate the mounting work.

Regarding the construction method, the pipe is inserted into the pipe soundproofing material, the pipe soundproofing material is moved in the pipe axis direction, and the position of the pipe soundproofing material is adjusted except for the insertion margin of the pipe joint. If multiple pipe sound insulation materials are installed on the straight pipe section,
Paste joint tape between adjacent pipe sound insulation materials,
It is necessary to prevent gaps from being formed between pipe soundproofing materials.
In addition, it is necessary to similarly apply a joint tape between the pipe soundproofing material and the irregularly shaped member, and to process the joint tape.

When the irregularly shaped member is previously attached to the piping, the same processing as that for the ordinary irregularly shaped pipe may be used. In the case where the deformed member is provided with one back crack or the deformed member is divided into two, if the deformed member is attached to the deformed portion in advance and piping is performed, the construction becomes easier.

As with other soundproofing works, the soundproofing work for pipes must be protected from two points, namely, not to make contact with the pipes and the building such as walls, floors, ceiling columns, beams, etc. of the building, and not to form gaps. , It should be constructed.

[0029]

EXAMPLES Hereinafter, more detailed experimental results will be described. (Embodiment 1) FIG. 1 is a cross-sectional view showing a configuration of a cross section of a sheet for manufacturing a pipe soundproofing material used in Embodiment 1. As viewed from above, a vibration damping sheet 40 in which a crosslinked elastic body 5 and closed cells 4 are alternately provided on an uneven sheet formed of a nonwoven fabric 1, a film 2, and two films 3 in order. It has. Further, a non-vulcanized butyl rubber sheet 7 having an adhesive layer 6 is partially overlapped with the lower surface of the vibration damping sheet 40.

In manufacturing the vibration damping layer 40, two films 3 were used, and the projections 4 of the closed-cell bodies and the two films 3 were fused and integrated. A crosslinked viscoelastic body comprising a hydroxyl group-terminated liquid polybutadiene rubber and an isocyanate was applied on a sheet having concave portions alternately on the same plane to prepare a sheet having a thickness of 4 mm. This sheet is applied to the damping layer 40
Used as The nonwoven fabric 1 having a thickness of 2 mm with the polyester film 2 having a thickness of 20 µm was bonded to the damping layer 40 such that the surface of the nonwoven fabric 1 on the polyester film 2 side was in contact with the crosslinked viscoelastic body of the damping layer 40. As a result, a vibration damping sheet with a nonwoven fabric having a thickness of 6 mm was obtained. After the crosslinking was completed, this sheet was cut to obtain a sheet having a width of 320 mm and a length of 1000 mm. Next, the non-vulcanized butyl rubber sheet 7 with the adhesive layer 6 having a thickness of 2 mm is cut, and the width 3
A sheet having a size of 80 mm and a length of 1000 mm was obtained. On the surface of the non-vulcanized butyl rubber sheet 7 on the side of the adhesive layer 6, the film surface side of the sheet having the uneven crosslinked viscoelastic body formed thereon was 100 mm in width, and the nonwoven fabric 1 was placed above. FIG. 1 shows the sheet in this state.

Next, as shown in FIG. 2, a hard vinyl chloride pipe 75A (hereinafter referred to as "VU pipe") 8 is placed on the nonwoven fabric 1, and the entire sheet shown in FIG.
Was wound around the VU tube 8 by rotating. The VU pipe 8 was pulled out, and a pipe-shaped sound insulating material 35 for a straight pipe portion having a length of 1 m was prepared. The pipe soundproofing material 35 was folded as shown in FIG.

Next, FIG.
As shown in (1), a pipe soundproof structure was formed by inserting the straight pipe portion 8 of the pipe and bringing them into close contact with each other. Straight pipe section 8
A non-woven fabric 1 is provided on the outer periphery of the
0 is provided, and the damping sheet 40 is butted by the butting portion 9. A non-vulcanized butyl rubber sheet 7 provided with an adhesive layer 6 is provided on the outer periphery of the vibration damping sheet 40, and is overlapped at a position away from the abutting portion 9. Due to the action of the overlapping portion 10, a structure in which sound leakage hardly occurs is provided.

Next, a sheet having a cross section shown in FIG. 4 was used as the deformed member. That is, a non-vulcanized butyl rubber viscoelastic sheet (thickness: 1 mm) 11 is provided on a release paper 12, and a 2 mm-thick nonwoven fabric 1 with a film 2 is provided thereon. A vibration damping layer 40 having a thickness of 4 mm is provided. The vibration damping layer 40 includes a closed cell 4 and a crosslinked viscoelastic body 5 and is made of two films 3. The closed cell 4 and the crosslinked viscoelastic body 5 are placed on an uneven sheet. Have alternately. On top of this, the adhesive layer 6
Unvulcanized butyl rubber sheet 7 is laminated. This sheet is punched into a shape as shown in FIG.
A deformed member 38 was produced. The release paper 12 was removed from the deformed member 38 and attached to the 90 ° elbow of the VU tube. The seam of the deformed member was closed with a joint tape made of non-vulcanized butyl rubber having a thickness of 1 mm.

The pipe soundproofing material and the deformed member are attached to the corresponding straight pipe portion and deformed portion, respectively, and at the same time, the straight pipe portion and the deformed portion have the structure shown in FIG. 11 and FIG. It was constructed to be. FIG.
One of the left and right pipes shown in FIG. 1 was constructed, and the required time was measured.

In this case, joint tape is applied to the end of the pipe soundproofing material for the cylindrical straight pipe portion, between the pipe soundproofing materials for the straight pipe portion, and at the seam of the deformed portion, and the processing of each seam is completely performed. went.

The VU pipe 75A was cut out from a main pipe of 4 m / piece. The pipe soundproofing material for the cylindrical straight pipe portion was cut out from 1 m / piece, and cut in a folded state with a cutter knife according to the size of the pipe.

FIG. 11 is a diagram showing the piping condition of the test room. The plumbing is symmetrical, and a toilet is installed at each upper end. The ceiling is provided with a ceiling mounting frame 24. In the piping on one side, the total extension length of the straight pipe portion 25 is 4.5 m, and the elbow portions 26 are at four locations, and are attached at four locations by support bands 27.

FIG. 12 shows a sectional structure of the test chamber of FIG. A pipe path of drainage drained from the toilet and the low tank 28 and flowing down is shown. Sound receiving room 29
Sound level meter 3 connected from the microphone 30 to the measurement room 31
2. The loudness of the sound can be measured by the frequency analyzer 33.
Eight liters were drained from the low tank of the toilet shown in FIG. 12, and the sound flowing down the drain pipe was measured.

(Embodiment 2) As shown in FIG.
× Nonwoven fabric 1, 320 mm wide × 1000 mm long, 3 thickness
mm × width 330 × thickness 1000mm polyethylene open cell sheet 13 with an adhesive layer, 0.3mm thickness × 350mm
Lead sheet 14 with an adhesive layer having a width of 1000 mm and a length of 0.1 mm.
0.3mm thickness with 5mm thick non-vulcanized butyl viscoelastic body 11
The aluminum sheet 15 having a width of 380 mm and a length of 1000 mm was laminated to obtain a laminated sheet 37. At this time, the nonwoven fabric 1, the sheets 13, 14, and 15 are each 50 m
It was staggered by m. The VU tube 75A was placed on the laminated sheet with one side of the nonwoven fabric facing upward, and the laminated sheet was wound and affixed while rotating the VU tube 75A. next,
The VU pipe 75A was pulled out, and a pipe-shaped sound insulating material for a straight pipe portion having a length of 1 m was formed and folded in two.

As described above, the butted portions of the respective layers 1, 13, 14, and 15 are covered from the tube side by the layer on the outer periphery of the straight tube,
Since the difference between the inner and outer circumferences is small, it is difficult to form a gap, so that sound leakage is hardly caused. For this purpose, each layer 1, 1
3, 14, and 15 are slightly shifted stepwise.

FIG. 7 shows a modified member used in the second embodiment.
The laminated sheet 3 having the same cross-sectional configuration as the irregularly shaped member as the pipe soundproofing material for the tubular straight pipe portion according to the second embodiment.
7 was punched out to have a planar shape shown in FIG. This deformed member is set along the VU tube 90 ° elbow 75A, the joint of the deformed member is attached with joint tape, and the inner corner of the deformed member is cut in the tube axis direction as shown in FIG. Take out the tube 90 ° elbow 75A and take 1
In the position of No. 6, the odd-shaped member 42 divided at one position was obtained.

In the same manner as in Example 1, as shown in FIGS. 11 and 12, the construction of both the soundproofing material and the deformed member was simultaneously performed, and one of the piping was completed. The required construction time is shown in Table 1. In addition, 8 liters of drainage was drained from the toilet low tank to the constructed pipe, and the sound flowing down the drainage pipe was measured.

(Reference Example 1) FIG. 8 shows a state in which a pipe soundproofing material 39 for a straight pipe portion is folded in two. A laminated sheet of a needle punch carpet 17 having a thickness of 3 mm and a crosslinked foam sheet 18 was produced. The base material was used as a split cloth. As the cross-linked foam sheet 18, a cross-linked foam sheet of a hydroxyl-terminated liquid polybutadiene and isocyanate was used. The dimensions of the sheet 18 were 5 mm thick × 320 mm wide × 1000 mm long. Folded portions 19 were provided at two places in this laminated sheet, and butted portions 9 were formed so that there was no gap. Next, a thickness of 3 mm and a width of 380
The pressure-sensitive adhesive surface of the non-vulcanized butyl rubber sheet 7 having a pressure-sensitive adhesive layer having a size of 1000 mm × 1000 mm was pressed, and then folded back on the opposite surface to wind the outer periphery. This was used as a pipe soundproofing material for the straight pipe section.

Next, a laminated sheet having the same cross-sectional structure as that of the pipe soundproofing material of Reference Example 1 was punched into a planar shape as shown in FIG. This sheet was wrapped around the VU tube 90 ° elbow 75A, wrapped with joint tape, and the outer side of the elbow was split. Then V
The U-tube 90 ° elbow 75A was removed from the sheet to obtain an odd-shaped member.

FIG. 10 shows an example in which the outer periphery of the elbow portion of the odd-shaped member 50 of the first embodiment is broken. At the time of construction, open the back split part 16 to the left and right, attach the joint tape to the back split part 16 along the VU pipe 90 ボ ー elbow without any gap, and attach it to the joint with the pipe soundproofing material for the straight pipe part. I put tape.

In the same manner as in Examples 1 and 2, a pipe soundproofing material and a deformed member for a straight pipe portion were constructed. The 90 ° elbow was attached when the piping was attached. The required construction time was measured and is shown in Table 1. In addition, 8 liters of drainage water was allowed to flow down from the toilet low tank on the upper floor, and the drainage sound was measured.

Reference Example 2 FIG. 9 shows a pipe-shaped sound insulating material 45 for a tubular straight pipe of Reference Example 2.
This is an example provided on the outer periphery of a VU tube 75A. A 2 mm thick polyethylene closed cell foam 20 is laminated on the outer periphery of the VU tube 8, a 1 mm thick soft vinyl chloride sheet 21 is laminated on the outer periphery, and a 3 mm thick felt 22 is laminated on the outer periphery.
Were laminated. This laminated sheet was wound around the outer periphery of the VU tube 75A. A gap generated due to a difference in length between the inner layer and the outer layer is filled with open-cell polyethylene foam 23, and the outer periphery thereof is provided with an adhesive layer and a non-vulcanized 2 mm thick. A butyl rubber sheet 7 was provided. The superposed portion 10 of the outermost non-vulcanized butyl rubber sheet 7 was provided at a position away from the gap caused by the difference between the inner and outer peripheries.

Next, a deformed member was manufactured. The cross-sectional configuration of the deformed member is composed of a 1 mm thick non-vulcanized butyl rubber viscoelastic sheet, a 4 mm thick non-woven fabric with film, a 4 mm thick uneven crosslinked viscoelastic sheet, and a 2 mm thick non-vulcanized butyl rubber sheet The used sheet was used. This laminated sheet was punched into the shape shown in FIG.
A non-vulcanized butyl rubber viscoelastic body surface was attached to 5A, and attached with a joint tape so as not to generate a gap at a bonding portion.

The same procedure as in Example 1 was carried out using the above-mentioned tubular sound insulating material for a straight pipe portion and a deformed member. The required time is shown in Table 1, and the measurement results of the drainage sound are shown in Table 1.

(Comparative Example 1) Concavo-convex crosslinked viscoelastic vibration damping sheet with an adhesive layer having a thickness of 4 mm (the same as in Example 1),
A laminated sheet of a nonwoven fabric having a thickness of 2 mm and a non-vulcanized butyl rubber sheet having a thickness of 2 mm was prepared. The dimensions of the laminated sheet were 8 mm thick × 400 mm wide × 1000 mm. This was used as a pipe soundproofing material for the straight pipe section. The elbow member shown in FIG. 5 was punched out from the same sheet as the laminated sheet for the straight pipe portion and used.

At the time of construction, after the installation of the pipe was completed, the above-mentioned soundproofing member was attached to the pipe, and the time required from the start of the installation of the pipe was measured. Also, 8 liters of water was allowed to flow down from the toilet low tank on the upper floor to the pipe after the construction, and the drainage sound was measured.

(Comparative Example 2) A long roll of 900 mm in width made of glass wool having a thickness of 20 mm and a thickness of 1.2 mm
910 mm in width made of a vinyl chloride sound insulation sheet was prepared. After attaching the pipe, the laminate was wound around the pipe. The construction time was measured and is shown in Table 1.
For the piping after construction, from the toilet low tank on the upper floor,
8 liters of water was allowed to flow down, and the drainage sound was measured.

(Comparative Example 3) A vinyl chloride VU tube 75A was piped, and the time required for the pipe was measured. After installing this pipe, 8 liters of water was allowed to flow down from the toilet low tank on the upper floor without soundproofing treatment, and the drainage sound was measured.

[0054]

[Table 1]

Hereinafter, effects of the present invention will be described based on test results of Examples and Comparative Examples. In Example 1, the noise level was 34 dB (A), and the noise class was N-30.

This is a result in a state where there is no ceiling, a pipe shaft, etc., and is a very good result. Also, since the straight pipe part is cylindrical and can be easily folded in two, the cutting time can be easily adjusted by adjusting the dimensions.The straight pipe is inserted and moved in the axial direction of the pipe. Only the seam was stuck with joint tape, and the difference was only 10 minutes compared to the construction of the pipe alone of Comparative Example 3. In particular, since the elbow part is a member that has been pasted, the operation was exactly the same as that of a normal VU tube.

In the second embodiment, the sound performance is a noise level of 37d.
B (A), N-35 in noise class, and good.

As for the workability, although it took a little time to attach to the elbow part and cut the straight pipe part as compared with the first embodiment,
It shows that soundproofing work and plumbing work can be performed in about 20 minutes in the same degree.

Also, the results are better than those of Comparative Examples 1 and 2 which are conventionally used.

In Comparative Example 1, when a piping frame had a ceiling frame or the like, it took some time to perform the operation. In terms of sound performance, the noise level is 38 dB (A) and the noise class is N
-35, which was good.

Comparative Example 2 is currently commercially available and used in relatively large amounts. Since this is supplied as a long roll, there is an advantage that it can be applied to any pipe diameter, but it is troublesome to cut out a certain size from the roll, and once the glass wool is wound, the vinyl chloride sheet is further It takes a very long time to construct because of winding. In addition, since the elbow has no specific construction method and is a dedicated member, it took a particularly long time.

In terms of sound performance, the noise level is 45 dB
(A), the noise class is N-40, and even if a pipe shaft or a ceiling is provided, the effect is not sufficient.

In Comparative Example 3, a vinyl chloride VU tube, which is very frequently used in detached houses, was used as one index for comparison with the examples. In terms of sound performance, the noise level is 51 dB (A) and the noise class is N-45. It can be said that this is a level where sound claims frequently occur.

[0064]

As described above, according to the present invention, the workability was extremely improved and the soundproofing performance was also good.

Also, as an unexpected merit, for example, compared with Comparative Example 1, since only the outermost member is required to be overlapped in the longitudinal direction, no material is required for the overlapped portion.
Not only did it cost less, but it also looked cleaner. Further, the weight was reduced by the amount of the used material, and the workability was further improved.

The present invention can be applied not only to drainage pipes but also to air-conditioning ducts, pneumatic transportation pipes, etc., and therefore has great industrial utility value. In particular, hitherto, there has not been known a method in which a pipe soundproofing material is sequentially and successively attached to the outer periphery of a pipe, and the pipe soundproofing material is moved in the pipe axis direction to form a soundproof layer.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a laminated sheet for producing a pipe soundproofing material for a straight pipe portion according to Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view showing a state in which the laminated sheet of FIG.

FIG. 3 is a cross-sectional view showing a state in which the pipe soundproofing member 35 of FIG. 2 is folded in two.

FIG. 4 is an enlarged sectional view showing a configuration of a section of the pipe soundproofing member 35 of FIG.

FIG. 5 is a profiled member 38 for attachment to an elbow section.
It is a top view which shows the planar shape of.

FIG. 6 is a cross-sectional view showing a laminated sheet 37 for producing a pipe soundproofing material for a straight pipe portion according to Example 2.

FIG. 7 is a perspective view showing a deformed member used in the second embodiment.

FIG. 8 is a cross-sectional view showing a state where the pipe soundproofing material 39 for a straight pipe portion used in Reference Example 1 outside the present invention is folded in two.

FIG. 9 is a cross-sectional view showing an example in which a pipe-shaped sound insulating material for a cylindrical straight pipe according to Reference Example 2 outside the present invention is provided on the outer periphery of a VU pipe 8.

FIG. 10 is an example in which the outer periphery of an elbow portion of the odd-shaped member 50 of Reference Example 1 is broken.

FIG. 11 is a view showing a piping state of a test room.

FIG. 12 is a schematic diagram showing an arrangement of a test room.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E04B 1/82 F16L 9/143-57/00

Claims (3)

(57) [Claims] 1. A sound insulation material for a pipe to be installed on the outer periphery of a pipe, comprising at least two or more layers made of a material selected from a sound insulation material, a vibration insulation material, a vibration damping material, and a sound absorption material. It is made of a cylindrical object, and this cylindrical object is made of a material that can be deformed into a flat shape, so that when the pipe is inserted into the cylindrical object, the cylindrical object can be brought into close contact with the outer periphery of the pipe. Have an outer diameter dimension, and when the pipe is inserted into the tubular body, the inner peripheral surface of the tubular body can move without bonding to the outer periphery of the pipe, Of the respective layers constituting the cylindrical body, the end faces of the innermost layer are abutted and joined at one place, and a part of the outermost layer is overlapped at the overlapping portion, and joined. cage, in the overlapping portions, and a lower layer and an upper layer, the innermost layer is bonded That is superimposed on another distant position from the position
Tei Rukoto and said, piping acoustic insulation. 2. The method for installing a pipe soundproofing material according to claim 1, wherein a straight pipe portion of the pipe is inserted inside the pipe soundproofing material, and the pipe soundproofing material is provided on an outer peripheral surface of the straight pipe portion. A method of installing a soundproofing material for a pipe, comprising moving the pipe in the axial direction above, stopping at a predetermined position, and then attaching the pipe. 3. A modified member having a shape conforming to the shape of the modified portion is attached to the modified portion of the pipe, and the pipe soundproofing material is attached to the straight pipe portion of the pipe. 3. The method according to claim 2 , wherein the joint of the pipe and the joint is stopped with a joint tape.