JP2022007393A - Sound absorption body and sound absorption wall - Google Patents

Abstract

To provide a sound absorption body and a sound absorption wall that are free of trouble such as wrinkling of a surface or a decrease in sound absorption performance even when fire-resistant covering fabric with no elasticity is used.SOLUTION: A sound absorption body (interior panel) 35 comprises a plate-like member 36 which has firmness, urethane 37 added to the plate-like member 36, and fire-resistant covering fabric 38 which covers an outer side of the urethane 37. The fire-resistant covering fabric 38 and urethane 37 are bonded together by hot melting.SELECTED DRAWING: Figure 8

Description

The present invention relates to a sound absorbing body and a sound absorbing wall preferably used for a booth wall or the like used for office work or meetings.

Conventionally, there has been known a booth capable of suppressing the intrusion of external noise and human voice, blocking the line of sight from the outside, and increasing the degree of concentration in the internal space (see, for example, Patent Document 1).

In this type of booth or the like, it is necessary to suppress the sound in the internal space from leaking to the external space and the sound in the external space from invading the internal space. Therefore, many booth walls have a wall structure with sound absorbing / insulating performance equipped with a sound absorbing panel.

As a sound absorbing panel that has been known conventionally, for example, one in which a cloth upholstery or the like is stretched elastically on the surface of a urethane sheet is known, but the upholstery is nonflammable. If you use one, a problem will occur. That is, many non-combustible upholstery fabrics do not have elasticity, and if they are simply stretched on the surface of urethane, wrinkles are likely to occur on the upholstery fabric due to changes in temperature and humidity, aging, and the like.

In order to solve this problem, for example, it is conceivable to attach a non-combustible upholstery to urethane or the like using an adhesive, but if an adhesive is used, the cavities on the urethane surface will be blocked and sound absorption will occur. There is concern that performance problems will occur.

Such defects are not limited to booth walls, but also exist in those used for other purposes.

Special Table 2019-51098 No.

An object of the present invention is to provide a sound absorbing body capable of simultaneously solving the above-described problems and a sound absorbing wall using the sound absorbing body.

The sound absorbing body according to the first aspect of the present invention includes a plate-shaped member having shape-retaining properties, urethane attached to the plate-shaped member, and a non-combustible upholstery covering the outside of the urethane. The non-combustible upholstery and the urethane are bonded by hot melt.

The sound absorbing wall according to the invention according to claim 2 comprises an interior panel made of the sound absorbing body according to claim 1 and an exterior panel arranged on the outside of the interior panel, and the interior panel and the exterior panel are provided with each other. A cushioning material with irregularities is arranged between them.

The sound absorbing wall according to the third aspect of the present invention is the one according to the second aspect, and an air gap is formed between the uneven surface of the cushion material and the plate-shaped member of the interior panel. It is a thing.

The sound absorbing wall according to the invention according to claim 4 is the one according to claim 3, and a recessed portion for increasing the volume of the air gap is formed in a portion of the plate-shaped member corresponding to the cushion material. It is what has been done.

The sound absorbing wall according to the invention according to claim 5 is the one according to claim 2, 3 or 4, and is used as a wall for separating the internal space and the external space of the booth.

According to the present invention, it is possible to provide a sound absorbing body and a sound absorbing wall that do not cause problems such as wrinkles on the surface and deterioration of sound absorbing performance even when a non-flammable upholstery fabric having no elasticity is used. ..

The perspective view which shows the booth which concerns on one Embodiment of this invention. The front view which shows the booth which concerns on the same embodiment. The plan view which shows the booth which concerns on the same embodiment. FIG. 3 is a cross-sectional view taken along the line XX in FIG. An exploded perspective view showing the batholith of the booth according to the same embodiment. FIG. 4 is a cross-sectional view taken along the line YY in FIG. An exploded perspective view of the booth according to the same embodiment. An exploded perspective view showing the side wall of the booth according to the same embodiment. An exploded perspective view of the booth according to the same embodiment. An exploded perspective view showing the ceiling of the booth according to the same embodiment. An exploded perspective view of the booth according to the same embodiment. FIG. 4 is an enlarged view of part A in FIG. FIG. 12 is an enlarged view of part D in FIG. FIG. 4 is an enlarged view of part C in FIG. The perspective view which shows the batholith of the booth which concerns on the same embodiment partially broken. H arrow view in FIG. FIG. 15 is a view on arrow I. An exploded perspective view showing a main part of the batholith of the booth according to the same embodiment. The perspective view which shows the booth which concerns on other embodiment of this invention. The perspective view which shows the booth which concerns on other embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 18.

This embodiment is the case where the present invention is applied to the booth B for two people.

As shown in FIGS. 1 to 4, this booth B has a bottom plate 1 that closes the lower surface side of the internal space IS, a peripheral wall (front wall 2, side wall 3, back wall 4) that surrounds the circumference of the internal space IS, and the inside. It is provided with a ceiling 5 that closes the upper surface side of the space IS, a table 6 is arranged in the center of the internal space IS, and chairs 7 are provided on both sides of the table 6.

As shown in FIGS. 4, 5 and 9, the bottom plate 1 has a base body 11 made of sheet metal, for example, which constitutes an outer shell, and a reinforcing material (horizontal reinforcing material extending to the left and right) rigidly connected to the inner surface of the base body 11. 12, the horizontal reinforcing material 13 extending back and forth, and the vertical reinforcing material 14), the floor plate 15 mounted on the base main body 11 reinforced by the reinforcing materials 12 to 14, and the floor covering 16 laid on the floor plate 15. It is equipped with. The bottom plate 1 of this embodiment can be divided into a left bottom unit L, an intermediate bottom unit M, and a right bottom unit N for transportation, and the base main body of each bottom unit L, M, N at the time of installation. The 11s and the lateral reinforcing members 12 extending to the left and right are integrated by connecting them via a bracket 10 or the like. That is, the base body 11 is divided into a base body 11 (L) belonging to the left bottom unit L, a base body 11 (M) belonging to the intermediate bottom unit M, and a base body 11 (N) belonging to the right bottom unit N. Has been done. Further, the floor plate 15 includes one floor plate 15 (L) placed on the left bottom unit L, two floor boards 15 (M) generally placed on the intermediate bottom unit M, and a right bottom unit. It is divided into one floor plate 15 (N) placed on N. In the figure, 17 is a caster for moving the bottom plate 1 along the building floor F, 18 is an adjuster for adjusting the height positions of the four corners of the bottom plate 1 after the movement, and 19 is the relevant after the height adjustment is completed. It is a fixing tool for fixing the batholith 1 on the building floor F. As will be described later, the fixture 19 is for fixing the batholith 1 to the building floor F using anchor bolts T.

The front wall 2, which is a peripheral wall, closes the front surface of the internal space IS, and as shown in FIGS. 1, 2, 7, and 9, a left fixed panel having a width dimension corresponding to the left floor unit L described above. 21 is provided with a door panel 22 having a width dimension corresponding to the intermediate floor unit M, and a right fixing panel 23 having a width dimension corresponding to the right floor unit N. The left and right fixed panels 21 and 23 are frame bodies 21a and 23a in which transparent plates 21b and 23b such as glass are fitted. The door panel 22 includes a door edge frame 22b hinged to the fixed frame 22a and a transparent plate 22c fitted into the door edge frame 22b. In the figure, 22d is a hinge and 22e is a handle.

As shown in FIGS. 6 to 8, the peripheral wall 3 has an outer plate 31, a sound absorbing material 34 attached to the inner surface of the outer plate 31, and an interior arranged on the inner surface side of the sound absorbing material 34. A sound absorbing panel 35 for use is provided. The outer plate 31 has an area capable of closing the entire side surface of the internal space IS. The outer plate 31 is made of sheet metal, for example, and a plurality of reinforcing materials 32 extending in the front-rear direction and, for example, two reinforcing materials 33 extending in the vertical direction intersect each other in a grid shape on the inner surface thereof. In the state, it is rigidly connected and reinforced by welding or the like. The above-mentioned sound absorbing material 34 is arranged in the lattice-shaped space formed by the reinforcing materials 32 and 33. The sound absorbing material 34 has irregularities on the surface on the sound absorbing panel 35 side, and is made of a cushion material such as slab urethane. The sound absorbing panel 35 for the interior includes, for example, a wooden plate-shaped member 36, a urethane 37 attached to one surface of the plate-shaped member 36, and a non-combustible upholstery 38 that encloses the urethane 37. It has high sound absorption and is nonflammable, yet has a good appearance. The non-flammable upholstery 38 and the urethane 37 are bonded by hot melt. The sound absorbing panel 35 is divided into an upper sound absorbing panel 35 (U) and a lower sound absorbing panel 35 (D). The lower sound absorbing panel 35 (D) is set to have a smaller vertical dimension than the upper sound absorbing panel 35 (U), but the structure is the same as that of the upper sound absorbing panel 35 (U).

Here, the configuration of the sound absorbing panel (sound absorbing body) 35 and the side wall (sound absorbing wall) 3 using the sound absorbing panel 35 will be described as follows according to the description of the claims.

The sound absorbing panel 35, which can be called an interior panel, faces the internal space IS, and has a plate-shaped member 36 having shape-retaining properties, a urethane 37 attached to the plate-shaped member 36, and the urethane 37. It is provided with a non-combustible upholstery 38 that covers the outside of the. The non-combustible upholstery 38 and the urethane 37 are bonded by hot melt as described above. Regarding the sound absorbing performance of the sound absorbing panel 35, the higher the density of the urethane 37 (the lower the foaming ratio), the higher the sound absorbing performance. Further, the urethane 37 having closed cells has higher sound absorption performance than the urethane 37 having open cells.

The above-mentioned side wall (sound absorbing wall) 3 used as a wall for separating the internal space IS of the booth B and the external space OS has a sound absorbing panel (interior panel) 35 and an outer plate arranged on the outside of the sound absorbing panel 35. (Exterior panel) 31 is provided, and a sound absorbing material 34 which is a cushioning material having irregularities is arranged between the sound absorbing panel 35 and the outer plate 31. An air gap AG is formed between the uneven surface 34a of the sound absorbing material 34 and the plate-shaped member 36 of the sound absorbing panel 35. Here, the thickness of the sound absorbing material 34 is set to, for example, 45 mm, and the protruding height of the convex portion on the surface 34a having the unevenness of the sound absorbing material 34 is set to, for example, about half (22.23 mm) of the thickness of the sound absorbing material 34. Has been done. The plate-shaped member 36 of the sound absorbing panel 35 is made of wood, for example, and the volume of the air gap AG is increased on the portion corresponding to the sound absorbing material 34, that is, the surface opposite to the surface to which the urethane 37 is attached. A recessed portion 36a is formed to allow the recessed portion 36a to be formed. The plate-shaped member 36 may be a relatively thick plate-shaped member (for example, 15 to 17 mm) without a recessed portion 36a. In this case, the air gap AG is formed only between the uneven surface 34a of the sound absorbing material 34 and the portion where the sound absorbing material 34 is in contact with the plate-shaped member 36.

As shown in FIGS. 4 and 7, the back wall 4 as a peripheral wall includes a left fixing panel 41 arranged between a support column (not shown) supporting the trailing edge of the left side wall 3 and an intermediate support column 42, and an intermediate support column. It comprises a right fixing panel 43 disposed between the 42 and a strut (not shown) that supports the trailing edge of the right side wall 3.

As shown in FIGS. 4, 9 to 11 and 14, the ceiling 5 includes, for example, a sheet metal top plate main body 51 constituting an outer shell, and reinforcing materials (left and right) rigidly connected to the inner surface of the top plate main body 51. Horizontal reinforcing material 52 extending in the direction, horizontal reinforcing material 53 extending in the front-rear direction, and vertical reinforcing material 54), and a ceiling panel for interior decoration arranged under the top plate main body 51 reinforced by the reinforcing materials 52, 53, 54. It is equipped with 56. The ceiling 5 of this embodiment can be divided into a left ceiling unit P, an intermediate ceiling unit Q, and a right ceiling unit R for transportation, and the ceiling main body of each ceiling unit P, Q, R at the time of assembly. The 51s and the lateral reinforcing members 52 extending to the left and right are connected to each other via a bracket 55 or the like to be integrated. That is, the top plate main body 51 includes a top plate main body 51 (P) belonging to the left ceiling unit P, a top plate main body 51 (Q) belonging to the intermediate ceiling unit Q, and a top plate main body 51 (R) belonging to the right ceiling unit R. ) And. Further, the ceiling panel 56 is provided under the ceiling panel 56 (P) arranged under the left ceiling unit P, the ceiling panel 56 (Q) arranged under the intermediate ceiling unit Q, and under the right ceiling unit R. It is divided into a ceiling panel 56 (R) to be arranged. The top plate main bodies 51 (P) and 51 (R) of the left and right ceiling units P and R are provided with, for example, three ventilation fans 57, respectively, and the top plate main body 51 (Q) of the intermediate ceiling unit Q is provided. ) Is equipped with a sprinkler 58. The sprinkler 58 is for injecting fire extinguishing water into the internal space IS when a fire is detected, and the injection nozzle 58a is provided in the internal space IS through an opening 56a provided in the intermediate ceiling panel 56 (Q). I'm facing you. The ceiling panel 56 (Q) in the middle is also equipped with a downlight 59 or the like for illuminating the interior space IS.

As shown in FIGS. 1 and 4, the table 6 arranged in the internal space IS supports the top plate 61 whose base end is supported by the intermediate support 42 of the back wall 4, and the portion near the tip of the top plate 61. A leg base 63 supported by the bottom plate 1 is provided at the lower end of the leg support 62.

As shown in FIGS. 1, 4, and 12, the chairs 7 arranged on both sides of the table 6 are arranged on the chair base 71 placed on the rug 16 of the bottom board 1 and on the chair base 71, respectively. It is provided with a chair body 72 having a box shape with an open lower surface and a backrest 79 erected at the back of the chair body 72.

As shown in FIG. 5, each chair base 71 has a frame shape in which frame materials are combined in a square shape, and the inner space 71S of each chair base 71 has a frame shape as shown in FIGS. 4, 12, and 13, respectively. It communicates with the slit-shaped vents 11a formed in the base bodies 11 (L) and 11 (N) via the notches 16a formed in the left and right ends of the rug 16 and the notches 15a formed in the floor plate 15. The air AI from the external space OS is introduced into the inner space 71S of each chair base 71 through these vents 11a and the notches 15a and 16a. The front frame member 71a of the chair base 71 is formed with a communication port 71b for communicating the inner space 71S of the chair base 71 with the internal space IS of the booth B.

As shown in FIG. 12, the chair body 72 is located between the front plate 73 facing the internal space IS of the booth B, the back plate 74 located under the backrest 79, and the upper ends of the front plate 73 and the back plate 74. The seat support plate 75 erected, the side plate 76 covered between the side ends of the front plate 73 and the back plate 74, and the back side space 72S interposed between the intermediate portions of these side plates 76 are provided in the chair body 72. It is provided with an intermediate plate 77 divided into a front space 72T and a seat 78, and a seat 78 is formed on the seat receiving plate 75. A plurality of notches 77a for forming a gap 72U with the seat plate 75 are formed on the upper end edge of the intermediate plate 77, and the back space 72S of the chair body 72 is formed through the notches 77a. And the front space 72T are communicated with each other.

As described above, this booth B forms an internal space IS isolated from the external space OS, and as shown in FIGS. 4, 12, and 14, the first and first booths face the internal space IS. Air passages 8 (V) and 8 (W) that guide the air AI while changing the direction are formed in the structures V and W of 2, and one end of the air passages 8 (V) and 8 (W). Is communicated with the external space OS, and the other end is communicated with the internal space IS.

Specifically, as shown in FIGS. 4 and 12, the first structure V is a box-shaped chair 7 having a seat 78 on the upper surface, and has a back space 72S and a front space 72T of the chair body 72. The air flow path 8 (V) is formed by communicating with the intermediate plate 77 via a notch 77a provided at the upper end of the intermediate plate 77. One end of the air flow path 8 (V) is communicated with the external space OS through the inner space 71S of the chair base 71, the notch 16a of the rug 16, the notch 15a of the floor plate 15, and the vent 11a of the base body 11. be. Further, the other end of the air flow path 8 (V) reaches the internal space IS through the inner space 71S of the chair base 71 communicating with the front space 72T and the communication port 71b provided in the front frame member 71a of the chair base 71. It is communicated. That is, the air flow path 8 (V) is opened in the bottom surface Ba of the booth B facing the building floor F. A sound absorbing material 70 is attached to the inner wall surface of the air flow path 8 (V). Specifically, sound absorbing materials 70 are attached to the inner surfaces of the front plate 73, the back plate 74, the seat receiving plate 75, and the side plates 76 of the chair body 72, and to both sides of the intermediate plate 77, respectively. The sound absorbing material 70 attached to the inner surface of the side plate 76 is not shown. The sound absorbing material 70 has irregularities on one surface facing the air flow path 8 (V), and is made of a cushion material such as slab urethane.

The second structure W is the ceiling 5 forming the above-mentioned double wall structure, and as shown in FIGS. 4 and 14, the ceiling main body 51 (P), (R) and the ceiling panel 56 (P), (R). ), An air flow path 8 (W) is formed. The air flow path 8 (W) is formed inside the left and right ceiling units P and R, and the lateral reinforcing member 53 extending in the front-rear direction is formed with an opening 53a that allows the flow of air AI. .. Therefore, one end of the air flow path 8 (W) is communicated with the external space OS via the ventilation fan 57, and the other end is a notch 35a formed at the upper end of the sound absorbing panel 35 (U) of the side wall 3. It is communicated to the internal space IS through. That is, the air flow path 8 (W) is opened to the top surface Bb of the booth B facing the building ceiling E.

Here, FIG. 1 is an overall perspective view showing the booth B. FIG. 2 is a front view showing booth B, and FIG. 3 is a plan view. FIG. 4 is a cross-sectional view taken along the line XX in FIG. FIG. 5 is an exploded perspective view showing the batholith 1 and the chair base 71. FIG. 6 is a cross-sectional view taken along the line YY in FIG. FIG. 7 is an exploded perspective view of the outer plate 31, the upper sound absorbing panel 35 (U), the left top plate main body 51 (P), and the left ceiling panel 56 (P) removed. FIG. 8 is an exploded perspective view showing the side wall 3. FIG. 9 is an exploded perspective view from the bottom surface side with the left top plate main body 51 (P) and the left ceiling panel 56 (P) removed. FIG. 10 is an exploded perspective view showing the ceiling 5 from the bottom surface side. FIG. 11 is an exploded perspective view with the top plate main body 51 removed. FIG. 12 is an enlarged view of part A in FIG. FIG. 13 is an enlarged view of part D in FIG. FIG. 14 is an enlarged view of part C in FIG. The booth B has a symmetrical shape, and in FIG. 12, only the air flow path 8 (V) inside the chair 7 on the left side is shown, and in FIG. 14, only the air flow path 8 (W) inside the left ceiling unit P is shown. However, an air flow path 8 (V) is similarly formed inside the chair 7 on the right side, and an air flow path 8 (W) is also formed inside the right ceiling unit P.

The booth B described above can be anchored to the building floor F in an assembled state, and the configuration for that purpose is as follows.

As described above, this booth B is provided with a bottom plate 1 that closes the lower surface side of the internal space IS, and as shown in FIGS. 15 to 17, the casters 17 and the rolling function of the casters 17 are on the lower surface of the bottom plate 1. The adjuster 18 is provided to invalidate the above. Then, an opening 11b for communicating the internal space IS with the external space OS is provided in the bottom board 1, and a fixing tool 19 for fixing the bottom board 1 to the building floor F is arranged in the vicinity of the opening 11b.

The caster 17 is attached to, for example, a horizontal reinforcing material (structural material) 13 extending in the front-rear direction of the bottom plate 1 and a horizontal reinforcing material 12 extending in the left-right direction via a mounting member 1X, and as shown in FIGS. 16 and 17. , A base portion 17a screwed to the mounting member 1X, a caster body 17b connected to the base portion 17a so as to be horizontally swiveled, and a wheel 17c axially supported by the caster body 17b. .. As shown in FIGS. 15 to 17, the mounting member 1X is a box-shaped member having a top plate 1Xa having a rectangular shape in a plan view and a hanging plate 1Xb hanging from each side of the top plate 1Xa. The caster 17 is screwed to. The two orthogonal hanging plates 1Xb of the mounting member 1X are attached to the lateral reinforcing member 13 extending in the front-rear direction and the lateral reinforcing member 12 extending in the left-right direction and are rigidly connected by welding or the like. Thus, the mounting member 1X also plays a role as a reinforcing material that firmly bonds the orthogonal lateral reinforcing materials 12 and 13 (orthogonal structural materials) to each other. In this embodiment, such mounting members 1X are provided at each corner of the left and right bottom units L and N, and are provided at the four corners of the intermediate bottom unit M, respectively. A caster 17 and an adjuster 18 are supported by the member 1X. As shown in FIGS. 16 and 17, the adjuster 18 includes a screw shaft 18a screwed into a screw hole (not shown) of the caster main body 17b, and a grounding body 18b provided at the lower end of the screw shaft 18a. Therefore, the height position of the ground contact body 18b can be changed by screwing the screw shaft 18a back and forth with respect to the caster body 17b.

On the other hand, the fixture 19 is attached to a lateral reinforcing member 13 extending in the front-rear direction, which is a structural material of the bottom plate 1 that supports the caster 17 and the adjuster 18. That is, as shown in FIGS. 16 to 18, the lateral reinforcing member 13 extending in the front-rear direction is made of sheet metal having a top plate 13a and side plates 13b and 13c hanging from the left and right side edges of the top plate 13a. The above-mentioned mounting member 1X that supports the caster 17 and the adjuster 18 is rigidly connected to one side plate 13b, and the fixture 19 is provided on the other side plate 13c. The fixture 19 is made of sheet metal, for example, as shown in FIGS. 16 to 18, which includes a horizontal portion 19a adjacent to the building floor F and an upright portion 19b that stands up from one end of the horizontal portion 19a. be. A screw insertion hole t for inserting an anchor bolt T driven into the building floor F is formed in the horizontal portion 19a of the fixture 19, and the tip of the anchor bolt T inserted into the screw insertion hole t is formed. The fixture 19 is fixed to the building floor F by screwing a nut Q to the portion. The upright portion 19b of the fixture 19 is formed with a screw insertion hole 19d for inserting a set screw 19c for fixing the fixture 19 to the lateral reinforcing member 13. That is, by screwing the set screw 19c inserted into the screw insertion hole 19d to the nut 19e fixed to the side plate 19c of the lateral reinforcing member 13, the fixture 19 can be fixed to the lateral reinforcing member 13. It has become. The screw insertion hole 19d described above has an elongated hole shape extending vertically, so that the fixture 19 can be tightened and fixed after adjusting the relative fixing position of the fixture 19 with respect to the bottom plate 1. It has become.

The fixture 19 is arranged inside the outer edge of the bottom plate 1 in a plan view. The opening 11b is provided at a position where the fixture 19 can be accessed from the internal space IS. Therefore, all the anchoring work of the bottom plate 1 by the fixing tool 19 can be performed from the internal space IS. That is, in the final assembled state of the booth B, the opening 11b is closed by the lid 11c and covered by the floor plate 15 and the rug 16, but before the lid 11c, the floor plate 15 and the rug 16 are attached. In this state or in the removed state, the fixture 19 can be accessed from the internal space IS through the opening 11b. The lid 11c is, for example, a flat plate having a quadrilateral shape, and is detachably attached to the opening end surface of the opening 11b by using a screw 11d as shown in FIG.

Here, FIG. 15 is a perspective view of the bottom board 1 in which the floor plate 15 and the rug 16 are omitted, and the base body 11 and the lateral reinforcing member 13 extending in the front-rear direction for clearly indicating the casters 17, the adjusters 18, and the fixtures 19. A part is excised and shown. FIG. 16 is an enlarged H arrow view showing a main part in FIG. 15. FIG. 17 is an enlarged view of an arrow I showing a main part in FIG. 15. FIG. 18 is an exploded perspective view showing a mounting mode of the fixture 19 and the lid 11c.

Booth B with such a configuration can be appropriately installed and used in a space such as an office, a space in a station, or an exhibition hall, and can be used for office work using a table 6 or a chair 7 in the internal space IS. You can have a meeting. At that time, since the internal space IS is a space surrounded by the bottom plate 1, the peripheral wall, and the ceiling 5, it is in a state of being isolated from the external space OS formed between the building floor F and the building ceiling E, and is used for office work. It becomes possible to concentrate on the meeting.

Moreover, in this booth B, since the interior panel 35, which is a sound absorbing body, is desired for the interior space IS, it is possible to suppress the sound from being trapped or reverberated in the interior space IS, and the interior space IS can be suppressed. The inside can be kept quiet and the sound effect can be kept good. Further, since the non-combustible upholstery 38 is stretched on the surface of the sound absorbing panel 35 facing the internal space, not only the appearance can be improved, but also a fire is likely to occur in the internal space IS. Even if it becomes, it can be prevented or suppressed from burning at once. Moreover, since the non-combustible upholstery 38 is adhered to the urethane 37 by hot melt, even if a non-combustible upholstery 38 having poor elasticity is used, wrinkles and the like can be effectively prevented. It is possible to maintain the initial tensioning state for a long time. Then, if the non-combustible upholstery 38 is adhered to the urethane 37 by hot melt, it is possible to effectively suppress the eyes of the non-combustible upholstery 38 and the bubbles of the urethane 37 from being blocked, and the adhesive or the like can be effectively suppressed. It is possible to exhibit higher sound absorption performance than the one using.

Further, since the left and right side walls 3 which are sound absorbing walls are respectively configured by using the sound absorbing panel 35, the intrusion of sound between the internal space IS and the external space OS can be blocked, or the sound passing through the side wall 3 can be blocked. Can be effectively attenuated. That is, in the case of the side wall 3 having such a configuration, there are two sound insulating layers, that is, a plate-shaped member 36 (wooden) of the sound absorbing panel 35 and an outer plate 31 (made of metal) which is an exterior panel. The sound to be transmitted can be effectively blocked or attenuated. Moreover, since the sound absorbing material 34 and the air gap AG exist between the plate-shaped member 36 of the sound absorbing panel 35 and the outer plate 31, the soundproofing effect can be particularly enhanced.

The present invention is not limited to the embodiment described above.

The sound absorbing body according to claim 1 is not limited to the panel constituting the wall, and may be an exterior material of furniture, a cushion of a sofa, or the like.

Further, the sound absorbing wall is not limited to the side wall of the booth, and can be applied to various things. That is, the sound absorbing wall can be applied to a wall partitioning rooms, a partition wall, and the like, and even when applied to a booth, the type and form of the booth are not limited to the illustrated examples. For example, although the above-described embodiment applies the present invention to the booth B for two people, the booth B2 for four people as shown in FIG. 19 and the booth B3 for one person as shown in FIG. 20 The present invention may be applied to the above. In FIGS. 19 and 20, the same reference numerals are given to the parts corresponding to the above-described embodiments, and the description thereof will be omitted. In the booth B3 for one person shown in FIG. 20, the base main body 1 and the top plate main body 5 are not divided into left and right, and the front wall 2 is composed of only the door panel 22. Further, in the internal space of the booth B3 for one person, only a table (not shown) is arranged.

In addition, in the above-described embodiment with reference to FIGS. 1 to 18, a cushion material having irregularities is arranged between the interior panel and the exterior panel, but such a cushion material may be omitted. do not have. However, by arranging such a cushion material between the interior panel and the exterior panel, the soundproofing effect can be enhanced as described above.

Further, in the above-described embodiment, the cushion material is arranged between the interior panel and the exterior panel, and then an air gap is formed between the uneven surface of the cushion material and the plate-shaped member of the interior panel. However, such an air gap may be omitted. However, by forming such an air gap, the soundproofing effect can be enhanced as described above.

In the above-described embodiment, a recess is formed in a portion of the plate-shaped member corresponding to the cushion material in order to increase the volume of the air gap, but such a recess may be omitted. However, the soundproofing effect can be further enhanced by forming such a recessed portion and increasing the volume of the air gap.

In addition, various modifications may be made as long as the gist of the present invention is not impaired.

B, B2, B3 ... Booth 31 ... Exterior panel (outer plate)
34 ... Cushion material (sound absorbing material)
34a ... Surface with unevenness 35 ... Sound absorber (interior panel)
36 ... Plate-shaped member 36a ... Recessed part 37 ... Urethane 38 ... Non-combustible upholstery IS ... Internal space OS ... External space AG ... Air gap

Claims (5)

A plate-shaped member having a shape-retaining property, urethane attached to the plate-shaped member, and a non-combustible upholstery covering the outside of the urethane are provided, and the non-combustible upholstery and the urethane are Sound absorber bonded by hot melt. An interior panel made of the sound absorbing body according to claim 1 and an exterior panel arranged on the outside of the interior panel are provided, and a cushioning material having irregularities is arranged between the interior panel and the exterior panel. Sound absorbing wall. The sound absorbing wall according to claim 2, wherein an air gap is formed between the uneven surface of the cushion material and the plate-shaped member of the interior panel. The sound absorbing wall according to claim 3, wherein a recessed portion for increasing the volume of the air gap is formed in a portion of the plate-shaped member corresponding to the cushion material. The sound absorbing wall according to claim 2, 3 or 4, which is used as a wall for separating the internal space and the external space of the booth.

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