JP2013210055A - Acoustic insulation material and acoustic insulation pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an acoustic insulation material that can easily maintain a shape of the acoustic material wound around a pipe, and to provide an acoustic insulation pipe.SOLUTION: An acoustic insulation material 12 has a first outside edge 21 and a second outside edge 31 which are made to abut on each other when wound around a pipe. The outside edge 21 and the second outside edge 31 have recesses 23, 34 having a pair of inside faces, and a first lock part 22 and a second lock part 32 for locking the first outside edge 21 and the second outside edge 31 in relation to protrusions 24, 33 having a pair of outside faces. An acoustic insulation pipe has an adhesive member which is arranged so as to straddle the first outside edge 21 and the second outside edge 31.

Description

  The present invention relates to a soundproofing material used by being wound around a tubular body, and a soundproofing tubular body including the soundproofing material.

  2. Description of the Related Art Conventionally, a soundproof tube having a soundproof material composed of a sound absorbing layer and a sound insulating layer disposed on the outer periphery of the tube is known. With this soundproof tube, a soundproof effect that suppresses leakage of sound generated by fluid flowing through the tube can be obtained (see, for example, Patent Document 1).

JP 2006-308071 A

  By the way, the soundproofing material is disposed on the outer periphery of the tubular body by being wound around the tubular body. Such a soundproof material has a first outer edge and a second outer edge that are abutted when wound around the tube. When the soundproof material is wound around the tubular body, the soundproof material is deformed along the outer peripheral surface of the tubular body against its elastic force. Then, after the first outer edge and the second outer edge are brought into contact with each other, for example, an adhesive member is provided across the first outer edge and the second outer edge. Thereby, a soundproof material is hold | maintained at the shape along the outer peripheral surface of a tubular body. However, for example, when the adhesive force of the adhesive member decreases, the first outer edge and the second outer edge may be gradually separated by the elastic force of the soundproof material.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a soundproofing material and a soundproofing tube that can easily maintain the shape of the soundproofing material wound around the tube.

  In order to achieve the above object, the soundproofing material of the invention according to claim 1 is a soundproofing material for forming a soundproofing tube by being used by being wound around a tube, and the soundproofing material comprises the tube. A first outer edge and a second outer edge that are abutted when wound around the body, wherein the first outer edge and the second outer edge are a recess having a pair of inner surfaces and a convex having a pair of outer surfaces; The gist of the present invention is to have a locking portion that locks the first outer edge and the second outer edge in relation to the portion.

  According to this configuration, the first outer edge and the second outer edge have the locking portion that locks the first outer edge and the second outer edge in the relationship between the concave portion and the convex portion described above. The separation between the first outer edge and the second outer edge is suppressed.

  According to a second aspect of the present invention, in the soundproofing material according to the first aspect, the pair of inner side surfaces of the concave portion has a shape that separates toward the inner depth of the concave portion, and the pair of the convex portion has The gist of the present invention is that the outer side surfaces of the slabs are shaped along the pair of inner side surfaces.

  According to this configuration, the movement in the direction in which the first outer edge and the second outer edge are separated from each other is preferably suppressed by the pair of outer surfaces of the convex portion coming into contact with the pair of inner surfaces of the concave portion. The Thereby, the separation between the first outer edge and the second outer edge is further easily suppressed.

  According to a third aspect of the present invention, in the soundproofing material according to the first or second aspect, the locking portion includes a first locking portion formed on the first outer edge and the second outer edge. The first locking portion includes the concave portion and the convex portion adjacent to the concave portion, and the second locking portion includes the convex portion. And the concave portion adjacent to the convex portion.

According to this configuration, the separation between the first outer edge and the second outer edge is further easily suppressed by the locking due to the concavo-convex relationship that continues along the outer edge of the soundproof material.
The soundproof tube of the invention described in claim 4 is a soundproof tube formed by winding the soundproof material according to any one of claims 1 to 3 around the tube, and the first outer edge. And the second outer edge is provided with an adhesive member.

  Here, even with the conventional soundproofing material, the adhesive member is provided across the first outer edge and the second outer edge, so that the separation of the outer edges is suppressed, but the adhesive force of the adhesive member is changed over time. There is a possibility that the outer edges are separated by lowering. According to the above configuration, since the separation between the first outer edge and the second outer edge of the soundproof material is suppressed, the soundproof material is easily held in a shape along the outer periphery of the tubular body.

  ADVANTAGE OF THE INVENTION According to this invention, the soundproof material and soundproof tube which are easy to maintain the shape of the soundproof material wound around the pipe are provided.

The fragmentary perspective view which shows the soundproof tube in embodiment. The partial top view which shows a soundproof material. (A)-(c) is a top view which shows the example of a change of a recessed part and a convex part, (d) is a fragmentary perspective view which shows the example of a change of a soundproof material.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2.
As shown in FIG. 1, the soundproof tube includes a tube 11 and a soundproof material 12 disposed on the outer periphery thereof. The tubular body 11 is a straight pipe formed of various hard materials and soft materials and having a constant outer dimension. It is a straight pipe having a cylindrical shape through which fluid flows. Examples of the material for forming the tube body 11 include resin materials such as polyvinyl chloride and polyethylene. A specific example of the tube body 11 is described in, for example, JIS K6741 (2007).

  The soundproofing material 12 has a sound absorbing layer 13 and a sound insulating layer 14, and is arranged from the outer peripheral surface of the tubular body 11 in this order. The sound absorbing layer 13 is composed of an open cell body. Examples of the open cell body include a foamed resin material, a fiber-based material, and a composite material thereof. Examples of the foamed resin material include urethane foam and polyolefin foam. Examples of the fiber material include various nonwoven fabrics, glass wool, rock wool, and the like. The sound absorbing layer 13 of this embodiment is made of a foamed resin material. The expansion ratio of the foamed resin material is preferably 10 to 50 times from the viewpoint of enhancing sound absorption performance and shape stability. In addition, it is preferable that the specific gravity of an open cell body is the range of 0.01-0.5, for example, and it is more preferable that it is the range of 0.02-0.3. The thickness of the sound absorbing layer 13 is set in a range of 5 to 30 mm, for example.

The sound insulation layer 14 is preferably made of a polymer material containing a filler. Examples of the polymer material include at least one selected from synthetic resins, elastomers, and rubbers. Examples of synthetic resins include olefin resins, acrylic resins, styrene resins, and the like. Examples of the elastomer include an olefin elastomer and a urethane elastomer. Examples of the rubber include acrylonitrile-butadiene rubber (NBR), styrene-butadiene rubber (SBR), and butyl rubber. Among the polymer materials, it is preferable to contain an elastomer or rubber as the polymer material from the viewpoint of being flexible and easily deforming into a shape along the outer periphery of the tube body 11. Examples of the filler include barium sulfate, calcium carbonate, talc, magnesium oxide, alumina, titanium oxide, barite, iron powder, zinc oxide, and graphite. The sound insulation layer 14 may contain additives such as a plasticizer, an antioxidant, and an adhesive as necessary. The thickness of the sound insulation layer 14 can be appropriately set based on, for example, the surface density of the sound insulation layer 14. The surface density of the sound insulating layer 14 is set in a range of, for example, 1.5 to 25 kg / m ² .

  As shown in FIG. 2, the soundproof material 12 before being arranged on the outer periphery of the tube body 11 is flat, and the soundproof tube body is formed by winding the soundproof material 12 around the tube body 11. The sound absorbing layer 13 and the sound insulating layer 14 constituting the soundproofing material 12 are joined with an adhesive such as a hot melt adhesive, for example. The soundproof material 12 has a first outer edge 21 and a second outer edge 31 that are abutted when wound around the tubular body 11. The outer edges 21 and 31 extend along the length direction of the tube body 11 when the soundproof material 12 is disposed on the outer periphery of the tube body 11. The width dimension from the first outer edge 21 to the second outer edge 31 corresponds to the outer peripheral length of the tubular body 11.

  The first outer edge 21 has a first locking portion 22 having a concave and convex shape, and the second outer edge 31 has a second locking portion 32 having a concave and convex shape. The first locking portion 22 has a first concave portion 23 and a first convex portion 24 adjacent to the first concave portion 23. A plurality of first locking portions 22 are arranged along the first outer edge 21. The second locking portion 32 has a second convex portion 33 and a second concave portion 34 adjacent to the second convex portion 33. A plurality of second locking portions 32 are arranged along the second outer edge 31. Each locking part 22, 32 is provided continuously along each outer edge 21, 31. In this embodiment, each latching | locking part 22 and 32 is provided continuously over the whole other than the both ends of each outer edge 21 and 31. As shown in FIG. In the circumferential direction of the tubular body 11, the outer edges 21 and 31 and the locking portions 22 and 32 are configured to be one place.

  Each of the concave portions 23 and 34 has a pair of inner side surfaces, and each of the convex portions 24 and 33 has a pair of outer side surfaces. The first convex portion 24 of the second locking portion 32 is inserted into the first concave portion 23 constituting the first locking portion 22. On the other hand, the first convex portion 24 constituting the first locking portion 22 is inserted into the second concave portion 34 constituting the second locking portion 32. Thus, the first outer edge 21 and the second outer edge 31 are locked by the relationship between the concave portions 23 and 34 and the convex portions 24 and 33.

  A pair of inner side surfaces of the recesses 23 and 34 are inclined surfaces that are separated toward the inner depth of the recesses 23 and 34. The pair of outer surfaces of the convex portions 24 and 33 are inclined surfaces that form shapes along the pair of inner surfaces of the concave portions 23 and 34. In addition, the front end surface of each convex part 24 and 33 has the external shape corresponding to the inner back surface formed in a line with a pair of opposing inner surface in each recessed part 23 and 34. As shown in FIG.

  The soundproof material 12 configured as described above is formed by a punching process in which a soundproof sheet, which is a laminated body in which the sound absorbing layer 13 and the sound insulating layer 14 are stacked, is punched with a punching blade. For example, when forming the plurality of soundproofing materials 12, 12 of the first soundproofing material 12 and the second soundproofing material 12 using a soundproofing sheet, the first outer edge 21 of the first soundproofing material 12 and The second outer edge 31 of the second soundproof material 12 can be punched with the same punching blade. In this case, it is easy to reduce the edge material in the soundproof sheet.

  By deforming and winding the flat soundproof material 12 into a shape along the tube 11, the soundproof material 12 is disposed on the outer periphery of the tube 11. As shown in FIG. 1, the soundproof material 12 is provided with an adhesive member 41 across the first outer edge 21 and the second outer edge 31. Examples of the pressure-sensitive adhesive member 41 include a material having a base material and a pressure-sensitive adhesive layer, and commercially available products such as pressure-sensitive adhesive tapes and joint tapes can be used.

The soundproof tube is applied to transport of fluid such as liquid or gas. The soundproof tube can be suitably used for applications that constitute a residential piping structure that suppresses sound leakage associated with the drainage of the house.
Next, the operation of the soundproof material 12 and the soundproof tube will be described.

  When the flat soundproof material 12 is wound around the tube body 11, the soundproof material 12 is deformed along the outer peripheral surface of the tube body 11 against its elastic force. Then, the first outer edge 21 and the second outer edge are inserted by inserting the convex portions 24 and 33 into the concave portions 23 and 34 so that the concave portions 23 and 34 and the convex portions 24 and 33 overlap each other. 31 is locked. Thereby, the space | interval of each outer edge 21 and 31 is suppressed.

  The soundproof tube is provided with an adhesive member 41 straddling the first outer edge 21 and the second outer edge 31. Here, even if it is the conventional soundproof material, although the separation of each outer edge is suppressed by providing the adhesive member 41 across the first outer edge and the second outer edge, the adhesive force of the adhesive member 41 is There is a possibility that the outer edges are separated due to a decrease with time. In this regard, in the soundproof tube of the present embodiment, since the separation from the outer edges 21 and 31 is suppressed, the soundproof material 12 is easily held in a shape along the outer periphery of the tube 11.

The effects exhibited by this embodiment will be described below.
(1) The 1st outer edge 21 and the 2nd outer edge 31 are the 1st outer edge 21 by the relationship between each recessed part 23 and 34 which has a pair of inner surface, and each convex part 24 and 33 which has a pair of outer surface. And the second outer edge 31 are provided with a first locking portion 22 and a second locking portion 32. Thereby, the space | interval of each outer edge 21 and 31 is suppressed. Therefore, it becomes easy to maintain the shape of the soundproofing material 12 when the soundproofing material 12 is wound around the tubular body 11.

  (2) The pair of inner side surfaces of the recesses 23 and 34 are shaped so as to be separated toward the inner depth of the recesses 23 and 34. In addition, the pair of outer side surfaces of the convex portions 24 and 33 has a shape along the pair of inner side surfaces of the concave portions 23 and 34. According to this configuration, the movement of the outer edges 21 and 31 in the separating direction is caused by the pair of outer surfaces of the convex portions 24 and 33 coming into contact with the pair of inner surfaces of the concave portions 23 and 34. It is preferably suppressed. As a result, the separation between the outer edges 21 and 31 is further easily suppressed. Therefore, it becomes easier to maintain the shape of the soundproofing material 12 when the soundproofing material 12 is wound around the tubular body 11.

  (3) The first locking portion 22 includes a first recess 23 and a second convex portion 33 adjacent to the first concave portion 23, and the second locking portion 32 includes the second convex portion 33, The second convex portion 33 is adjacent to the second concave portion 34. According to this configuration, the separation from the outer edges 21, 31 is further easily suppressed by the locking due to the continuous unevenness along the outer edges 21, 31 of the soundproof material 12. Therefore, it becomes easier to maintain the shape of the soundproofing material 12 when the soundproofing material 12 is wound around the tubular body 11. In this advantage, it is more preferable that the locking portions 22 and 32 are provided continuously along the outer edges 21 and 31, and are provided continuously over the entire portion other than both end portions of the outer edges 21 and 31. More preferably.

  (4) The soundproof tube is provided with an adhesive member 41 across the outer edges 21 and 31. According to this configuration, since the separation between the outer edges 21 and 31 is suppressed, the soundproof material 12 is easily held in a shape along the outer periphery of the tubular body 11 even if the adhesive force of the adhesive member 41 is reduced. Become. Therefore, for example, in a soundproof tube arranged in the horizontal direction, a change in soundproof performance due to the fact that the soundproof material 12 is biased with respect to the tube 11 is suppressed. Further, for example, sound leakage through the gap between the outer edges 21 and 31 is suppressed. Thereby, it is easy to maintain the original soundproof performance in which the soundproof material 12 is wound.

  (5) For example, when the pair of inner side surfaces of the concave portions 23 and 34 and the pair of outer side surfaces of the convex portions 24 and 33 are stepped surfaces, the shapes of the locking portions 22 are complicated due to the complicated shape. , 32 may be complicated. In this respect, in the present embodiment, the pair of inner side surfaces of the concave portions 23 and 34 are inclined surfaces that are separated from each other toward the inner depth of the concave portions 23 and 34. The pair of outer surfaces of the convex portions 24 and 33 are inclined surfaces that form shapes along the pair of inner surfaces of the concave portions 23 and 34. For this reason, it can avoid as much as possible that each recessed part 23 and 34 and each convex part 24 and 33 become a complicated shape, and the separation | spacing of each outer edge 21 and 31 can be suppressed suitably.

  (6) For example, by arranging a plurality of soundproofing materials in the circumferential direction of the tubular body 11, when the soundproofing material is provided on the tubular body 11, the number of locations serving as outer edges that cause separation of the soundproofing material increases. By forming the concave portion and the convex portion described above at such locations, the separation between the outer edges is suppressed, but the operation of inserting the convex portion into the concave portion becomes complicated. In the present embodiment, each outer edge 21, 31 extends along the length direction of the tube body 11, and the width dimension from the first outer edge 21 to the second outer edge 31 is the outer peripheral length of the tube body 11. It corresponds to. And each latching | locking part 22 and 32 is set as the structure used as one place in the circumferential direction of the pipe body 11. As shown in FIG. For this reason, the operation | work locked by the 1st latching | locking part 22 and the 2nd latching | locking part 32 becomes easy. Moreover, it becomes easy to reduce the number of the soundproofing materials 12.

  (7) As described above, since the shape of the soundproof material 12 is easily maintained when the soundproof material 12 is wound around the tube body 11, after the soundproof material 12 is wound around the tube body 11, The operation of providing the adhesive member 41 is facilitated.

(Example of change)
In addition, the said embodiment can also be changed and comprised as follows.
-The shape of each recessed part 23 and 34 and the shape of each convex part 24 and 33 may be changed. Below, although the example of a change of the 1st recessed part 23 and the 2nd convex part 33 is demonstrated, the 1st convex part 24 and the 2nd recessed part 34 can be changed similarly. For example, as illustrated in FIG. 3A, the first concave portion 51 and the second convex portion 61 may be changed. The distance between the pair of inner side surfaces of the first recess 51 is substantially constant, and the pair of outer side surfaces of the second projection 61 has a shape along the pair of inner sides of the first recess 51. . Such first concave portion 51 and second convex portion 61 are preferably formed by a punching process in which a laminated sheet in which a sound absorbing layer and a sound insulating layer are laminated is punched with a punching blade. That is, by forming the first concave portion 51 and the second convex portion 61 with the punching blade having the same shape, the outer shape of the first concave portion 51 and the inner shape of the second convex portion 61 can be made substantially the same shape. It becomes easy. In the state where the second convex portion 61 is inserted into the first concave portion 51 formed in this way, frictional resistance is generated due to contact between the inner side surface of the first concave portion 51 and the outer side surface of the second convex portion 61. The separation between 21 and 31 is suppressed. In particular, since the sound absorbing layer is composed of an open cell body, the separation of the outer edges 21 and 31 is suppressed by the frictional resistance between the end faces of the sound absorbing layer.

  As shown in FIG. 3B, the pair of inner side surfaces of the first concave portion 52 is formed in a stepped shape, and the pair of outer side surfaces of the second convex portion 62 is a pair of the first concave portion 52. You may form in the shape along an inner surface. In addition, as shown in FIG. 3C, a part of the pair of inner side surfaces of the first recess 53 is shaped to be separated toward the inner depth of the first recess 53 and the second protrusion 63. The pair of outer surfaces may be formed in a shape along the pair of inner surfaces of the first recess 53. Even in the case of the first concave portions 52 and 53 and the second convex portions 62 and 63 shown in FIG. 3B and FIG. 3C, the effect based on the configuration described in the column (2) of the embodiment. Can be obtained.

-You may form one inner surface in a step shape among a pair of inner surfaces which each recessed part 23 and 34 has.
Each locking part 22, 32 is provided continuously along each outer edge 21, 31, but each locking part 22, 32 is provided discontinuously along each outer edge 21, 31. Also good. Moreover, you may change into the soundproof material in which only one set of each latching | locking part 22 and 32 was formed. Furthermore, it may be changed to a soundproof material in which only one set of concave and convex portions is formed. Moreover, when forming the group of a recessed part and a convex part two or more, the uneven | corrugated shape of each group may differ.

  In the above-described embodiment, the sound insulating material 12 applied to the straight pipe as the tubular body 11 has been described as an example. However, the sound insulating material 12 may be changed to a sound insulating material disposed on the outer periphery of the joint pipe. Even in this case, the outer shape of the soundproof material is changed as necessary, and the recesses and the convex portions are formed on at least a pair of outer edges that are abutted in the soundproof material, thereby suppressing the separation between the outer edges. can do. A specific example of the joint pipe is described in, for example, JIS K6739 (2007).

  -The soundproofing material 12 arrange | positioned on the outer periphery of the tubular body 11 may be further coat | covered with the heat-shrinkable film. Even in this case, since the shape of the soundproofing material 12 can be easily maintained when it is wound around the tubular body 11, for example, a heat-shrinkable film before heat shrinking is disposed on the outer periphery of the soundproofing material 12. At this time, the work of temporarily fixing the soundproofing material 12 with the adhesive member 41 becomes easy. Further, when such temporary fixing is omitted and a heat-shrinkable film before heat shrinking is disposed on the outer periphery of the soundproof material 12, the work is facilitated.

-At least one of the sound absorption layer 13 and the sound insulation layer 14 which comprises the soundproof material 12 may be comprised from several layers.
-In the said embodiment, although each recessed part 23 and 34 and each convex part 24 and 33 are formed in any of the sound-absorbing layer 13 and the sound-insulating layer 14 which comprise the sound-insulating material 12, at least one layer which a sound-insulating material comprises The concave portions 23 and 34 and the convex portions 24 and 33 may be formed. For example, as shown in FIG. 3 (d), the first concave portion 54 and the second convex portion 64 may be formed only in the sound absorbing layer 13, and the sound insulating layer 14 may be laminated on the sound absorbing layer 13. Further, for example, the sound insulating layer 14 may be changed to a soundproof material in which a concave portion and a convex portion are formed only and the sound absorbing layer is laminated on the sound insulating layer. However, from the viewpoint that the soundproofing material can be easily formed by, for example, punching, when the soundproofing material 12 is formed of a laminate as in the above-described embodiment, the concave portions 23, 34 and the convex portions 24, It is preferable that 33 is formed over the thickness direction of a laminated body.

Next, the technical idea that can be grasped from the embodiment and the modified examples will be described below.
(A) At least one of the pair of inner side surfaces of the concave portion is configured by an inclined surface whose width increases toward the inner depth, and the outer surface of the convex portion is along the inclined surface in the concave portion. A soundproofing material composed of an inclined surface.

  (B) The first outer edge and the second outer edge extend along the length direction of the tube body, and the width dimension from the first outer edge to the second outer edge is the tube A soundproof material having a configuration in which the locking portion is provided at one place in the circumferential direction of the tubular body by corresponding to the outer peripheral length of the body.

  (C) The soundproofing material is formed from a laminated body of a sound absorbing layer and a sound insulating layer, and the concave portion and the convex portion are formed over the thickness direction of the laminated body.

  DESCRIPTION OF SYMBOLS 11 ... Tube, 12 ... Soundproofing material, 21 ... 1st outer edge, 22 ... 1st latching | locking part, 23, 51, 52, 53, 54 ... 1st recessed part, 24 ... 1st convex part, 31 ... 2nd Outer edge, 32 ... second locking part, 33, 61, 62, 63, 64 ... second convex part, 34 ... second concave part, 41 ... adhesive member.

Claims (4)

A soundproofing material for forming a soundproofing tube by using it wrapped around a tube,
The soundproof material has a first outer edge and a second outer edge that are abutted when wound around the tubular body, and the first outer edge and the second outer edge are a recess having a pair of inner surfaces; A soundproofing material comprising a locking portion that locks the first outer edge and the second outer edge in relation to a convex portion having a pair of outer surfaces.   The pair of inner side surfaces possessed by the recesses are shaped so as to be separated toward the inner depth of the recess, and the pair of outer side surfaces possessed by the projections are shaped along the pair of inner side surfaces. The soundproofing material according to claim 1, wherein The locking portion is composed of a first locking portion formed at the first outer edge and a second locking portion formed at the second outer edge,
The first locking portion includes the concave portion and the convex portion adjacent to the concave portion, and the second locking portion includes the convex portion and the concave portion adjacent to the convex portion. The soundproofing material according to claim 1 or 2, characterized by the above-mentioned.   It is a soundproof pipe formed by winding the soundproof material according to any one of claims 1 to 3 around the pipe, and an adhesive member straddles the first outer edge and the second outer edge. A soundproof tube characterized by being provided.