JP7145089B2 - soundproof box - Google Patents

Description

The present invention relates to sound insulating boxes.

Conventionally, a sound insulating box is installed behind a wall so that its opening faces the front side of the wall through a through hole formed in the wall, and is installed on the front side of the wall while accommodating wiring devices inside through the through hole. It is something to do. In general, if an ordinary wiring box is installed in a through-hole in a wall, the sound insulation performance is lowered and sound leakage occurs from the through-hole. Thus, the deterioration of sound insulation can be suppressed. Various sound insulation boxes have been developed in order to improve the sound insulation of the sound insulation box.

For example, Patent Literature 1 discloses a sound insulating fireproof box arranged behind a wall. In the following paragraphs, the reference numerals of Patent Document 1 are shown in parentheses. The sound insulating fireproof box (11) has an opening (12a) on the front, and has a bottomed box-like box body (12 ). The sound insulating fireproof box (11) has elasticity and fire resistance, surrounds the opening (12a) of the box body (12), protrudes forward from the front surface of the box body (12), and is attached to the back surface of the wall material. It comprises a contiguous refractory member (30). Furthermore, the sound insulating fireproof box (11) comprises a sound insulating member (20) made of a sound insulating material and covering the entire peripheral wall of the box body (12) except for the opening (12a). The fireproof member (30) protrudes forward from the front surface of the box body (12) and the front surface of the box cover (31) and has rubber elasticity. For this reason, when the wall material (W) is erected in front of the box body (12), the resiliently deformed fireproof member (30) is restored to its original shape by the force of restoring the fireproof member (30) to the wall material (W). can be closely attached to the back of the Therefore, the refractory member (30) is brought into close contact with the periphery of the through hole (Wa), and leakage of sound from the through hole (Wa) can be suppressed.

JP 2013-236415 A

In a conventional sound insulating box such as that disclosed in Patent Document 1, the fireproof member elastically collapses and abuts against the wall surface from behind the wall, thereby sealing the open end of the sound insulating box and the wall surface. However, it is difficult for the strip-shaped refractory member to fall uniformly in the same manner over the entire circumference, and it is unavoidable that gaps occur depending on the location. For example, a band-shaped fireproof member may be alternately bent to both the outside and the inside of the box, creating a gap at the boundary. This gap becomes a factor of sound leakage, and the sound insulation deteriorates. In other words, the conventional sound insulation box has a problem that gaps are likely to occur and the sound insulation is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a sound insulation box with improved sound insulation.

The sound insulating box according to claim 1 is a bottomed box-shaped box body having a front opening and a peripheral wall consisting of a bottom wall and a side wall,
a box cover having an instrument fixing portion for attaching an instrument and attached to the opening side of the box body so as to close at least part of the opening;
an elastic band-shaped member attached to the side wall so as to surround the opening of the box body and the outer periphery of the box cover and protrude forward from the front surface of the box body;
an elastic annular member having self-restoring properties joined to the front surface of the box cover and the inner peripheral surface of the belt-shaped member projecting forward from the front surface of the box body;
characterized by comprising

The sound insulating box according to claim 2 is the sound insulating box according to claim 1, further comprising a sound insulating member made of a sound insulating material and covering at least the side wall of the box body.

The sound insulating box according to claim 3 is the sound insulating box according to claim 1 or 2, wherein the box cover is formed with a coating margin projecting forward from the front surface of the box cover, and the band-shaped body and the front end surface of the elastic body is positioned on the same plane as the front surface of the coating allowance portion, or is formed so as to protrude from the front surface of the coating allowance portion.

The sound insulating box according to claim 4 is the sound insulating box according to any one of claims 1 to 3, wherein the annular member bulges radially inward and outward when pressed against the wall surface. It is characterized by being crushable and deformable.

A sound insulating box according to claim 5 is the sound insulating box according to any one of claims 1 to 4, characterized in that the width of the elastic body is larger than the width of the strip.

The sound insulating box according to claim 6 is the sound insulating box according to any one of claims 1 to 5, wherein the elastic body is made of a foam material.

According to the first aspect of the invention, the inner peripheral surface of the band-shaped member surrounding the opening of the box body and the outer periphery of the box cover and projecting forward from the front surface of the box body is an elastic annular member having self-restoring properties. It is joined to the front of the box cover via the That is, since the annular member is arranged inside the belt-like member, when the belt-like member abuts against the wall surface, it is elastically deformed integrally with the annular member, and is guided so as to bend in the same direction. As a result, the belt-shaped member can be bent and deformed so as to be uniformly in contact with the box body when it is brought into close contact with the wall surface, thereby effectively suppressing the formation of a gap. In addition, since the annular member itself is an elastic body having self-restoring properties, the annular member functions to seal the gap even in a situation where a gap may occur between the tip of the bent belt-shaped member and the wall surface. can. Therefore, the sound insulating box of the present invention can more reliably seal the opening end of the sound insulating box and the wall surface to improve sound insulation.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, by covering at least the side walls of the box body with the sound insulation member, it is possible to further improve the sound insulation.

According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, the front end faces of the belt-shaped member and the annular member protrude beyond the projecting width of the coating margin formed on the box cover. Since it extends, it is possible to seal the open end of the sound insulating box and the wall surface by bringing the belt-shaped member and the annular member into close contact with the wall surface while the coating margin is in contact with the wall surface. be.

According to the fourth aspect of the invention, in addition to the effects of any one of the first to third aspects of the invention, the annular member expands radially outward when pressed against the wall surface so that the belt-like member is It is possible to more effectively guide the falling down to the outside, and to more reliably seal the opening end of the sound insulating box and the wall surface with the belt-shaped member.

According to the invention of claim 5, in addition to the effect of any one of claims 1 to 4, the width of the annular member is greater than the width of the belt-shaped member, so that the belt-shaped member is elastically deformed by the annular member. , and the tilting direction of the belt-shaped member can be controlled more reliably.

According to the invention of claim 6, in addition to the effect of any one of claims 1 to 5, since the annular member is made of a foaming material, the annular member can be effectively crushed and deformed. is.

1 is a schematic perspective view of a sound insulating box according to one embodiment of the invention; FIG. FIG. 2 is an exploded perspective view of the sound insulating box of FIG. 1; (a) A plan view, (b) a front view, and (c) a BB cross-sectional view of the box cover of the sound insulating box of FIG. (a) Development view of the sound insulation member of the sound insulation box of FIG. 2, and (b) partial sectional view. FIG. 2 is a schematic perspective view showing a form in which the sound insulation member is omitted in the sound insulation box of FIG. 1; (a) Front view and (b) AA sectional view of the sound insulating box of FIG. 1 is a schematic perspective view of an arrangement structure in which a sound insulating box according to one embodiment of the present invention is installed on a construction material; FIG. 8 is a schematic cross-sectional view of the arrangement structure of FIG. 7; FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view of an arrangement structure in which a sound insulating box of one embodiment of the present invention is installed on a building material and a wall is erected. FIG. 4 is a schematic exploded perspective view showing a sound insulating box according to another embodiment of the present invention; FIG. 4 is a schematic cross-sectional view showing a sound insulating box and an arrangement structure of another embodiment of the present invention;

An embodiment of the present invention will be described below with reference to the drawings. It should be noted that the shapes in the drawings referred to in the following description are conceptual diagrams or schematic diagrams for explaining preferred shapes and dimensions, and the dimensional ratios and the like do not necessarily match the actual dimensional ratios. That is, the present invention is not limited to the dimensional ratios in the drawings.

The sound insulation box 100 according to one embodiment of the present invention is installed behind the wall, and wiring devices such as outlets and switches are arranged on the front side of the wall through through holes in the wall while suppressing deterioration of sound insulation. It is configured. FIG. 1 is a schematic perspective view of the sound insulating box 100. FIG. FIG. 2 is an exploded perspective view of the sound insulating box 100. FIG. As shown in FIGS. 1 and 2, the sound insulation box 100 comprises a box body 110, a box cover 120, a strip member 130, an annular member 1140 and a sound insulation member 150. As shown in FIG. That is, the sound insulating box 100 is made by combining these components. Each component will be described in detail below.

As shown in FIG. 2, the box main body 110 has a bottomed rectangular box shape having an opening 113 on the front surface (one side) from a square plate-shaped bottom wall 111 and side walls 112 erected from the periphery of the bottom wall 111 . formed. The bottom wall 111 and side walls 112 form the peripheral wall of the box body 110, and the box body 111 is made of a synthetic resin material. Note that the box body 111 may be made of metal to provide fire resistance.

A bottom wall 111 of the box body 110 is formed with a plurality of fixing holes 115 for fixing the box body 110 to the support 15 (see FIG. 7) with screws. A cover fixing portion 116 for fixing the box cover 120 with screws is formed on the front end surface of the side wall 112 of the box main body 110 . The cover fixing portion 116 protrudes inside the opening 113 from the pair of side walls 112, 112 facing each other, and corresponds to screw holes 125 of the box cover 120, which will be described later.

As shown in FIGS. 2 and 3, the box cover 120 is made of a synthetic resin material and shaped like a square frame. The box cover 120 includes a flat frame portion 121 and a coating allowance portion 122 projecting from the front surface of the frame portion 121 at a predetermined height. Screw holes 125 corresponding to the cover fixing portions 116 are formed near the four corners of the frame portion 121 . Also, the coating allowance portion 122 is formed as a substantially rectangular or oval cylindrical body. An opening 123 for communicating with the inside of the box body 110 is formed in the front surface of the coating allowance portion 122 . Furthermore, the front end face of the coating allowance portion 122 is provided with an appliance fixing portion 124 for fixing the wiring appliance with a screw. The instrument fixing portions 124 are screw holes arranged on the upper and lower (longitudinal ends) peripheral edges of the opening 123 .

The belt-shaped member 130 functions to seal between the opening end of the box body 110 and the wall surface to prevent sound leakage. The belt-shaped member 130 is, as shown in FIG. 2, an endless annular thin plate band made of a sound-insulating elastic material. In this embodiment, the strip member 130 is made of unvulcanized rubber. The band-shaped member 130 has an inner surface and an outer surface with a predetermined width (in the front-rear direction of the box body 110 ), and the inner surface is configured to be in close contact with the outer peripheral surface of the side wall 112 of the box body 110 . The (radial) thickness of the strip member 130 is sufficiently thin compared to its width. Therefore, the belt-like member 130 is elastically deformed so as to bend when a force is applied in the width direction (the front-rear direction of the box body 110). The band-shaped member 130 is fixed to the side wall 112 of the box body 110 at a fixing portion 131 on the base end side in the width direction, and protrudes from the side wall 112 of the box body 110 at a protruding portion 132 on the tip side in the width direction. It is The protrusion amount of the protruding portion 132 is set equal to or larger than the protrusion amount of the coating allowance portion 122 . In addition, it is preferable that the inner peripheral length of the belt-shaped member 130 is smaller than the outer peripheral length of the side wall 112 of the box body 110 . That is, the inner surface of the fixing portion 131 of the belt-like member 130 can be brought into close contact with the outer surface of the side wall 112 by attaching the belt-like member 130 to the side wall 112 while being elastically deformed so as to be stretched in the circumferential direction. The belt-shaped member 130 may be formed in an endless ring shape in advance, or may be formed by winding a belt-shaped tape around the outer periphery of the side wall 112 and adhering the ends thereof.

Annular member 140 functions to assist in sealing with wall surface by strip member 130 . As shown in FIG. 2, the annular member 140 is formed in the shape of an endless annular square frame. The annular member 140 is made of a self-restoring elastic foam material (so-called sponge). The expandable material can be selected from, for example, urethane foam, polyethylene foam, ethylene propylene rubber, chloroprene rubber, rubber sponge made of natural rubber, and the like. The annular member 140 has front and rear faces of predetermined width (in the radial direction) and has a predetermined thickness in the fore-and-aft direction. Due to its dimensions, the annular member 140 is configured to be crushed and deformed (instead of bending radially inward or outward) when a force is applied in the thickness direction (the front-rear direction of the box body 110). That is, the annular member 140 can be crushed and deformed so as to expand radially inward and outward when pressed against the wall surface. The annular member 140 has a front contact surface 141 for contacting the wall surface, a rear adhesive surface 142 adhered to the front surface of the frame body portion 121 of the cover body 140, and a band member 130 on the outer peripheral surface. It has an outer peripheral adhesive surface 143 that is adhered to the inner peripheral surface. That is, the outer peripheral shape of the annular member 140 is configured to be substantially the same as the outer peripheral shape of the side wall 112 of the box body 110 . The annular member 140 may be formed into an endless annular shape in advance, or may be formed by winding a long sponge around the inner periphery of the belt-shaped member 130 and joining the ends thereof.

The sound insulation member 150 is a sheet-like cover body integrally attached to the box body 110 so as to cover the peripheral wall of the box body 110 from the outer surface side. As shown in FIG. 4A, the sound insulation member 150 is formed by bending a sheet material into a box shape. As shown in FIG. 4B, the sound insulation member 150 includes a vibration damping layer 151 made of non-vulcanized rubber, which is a sound insulation material, and an aluminum constraining layer 152 laminated on the vibration damping layer 151. , is formed of a sheet material. The damping layer 151 of the sound insulation member 150 has a function of absorbing vibration due to propagated sound and suppressing leakage of sound from the damping layer 151 . The damping layer 151 has adhesiveness, and one surface thereof is adhered to the outer surface of the peripheral wall of the box body 110 by the adhesiveness, and the constraining layer 152 is adhered to the other surface. The constraining layer 152 has a function of restraining the vibration of the vibration damping layer 151 by adhering to the vibration damping layer 151 and restraining the sound leakage due to the vibration of the vibration damping layer 151 by restraining the surface to which it is adhered. . The sound insulation member 150 is formed by attaching a thin layer of aluminum (restraining layer 152) to one surface of a thin layer of non-vulcanized rubber (vibration damping layer 151) to form a sheet material. It is formed by cutting the material in a substantially cross shape. Before being integrated with the box main body 110, the sound insulation member 150 is not formed into a box shape and is stored in a sheet shape.

FIG. 5 is a perspective view of a box assembly 100' in which a box cover 120, a strip member 130 and a ring member 140 are attached to a box body 110. FIG. 6(a) and (b) are a front view and a sectional view of the box assembly 100'. Here, for convenience of explanation, the sound insulation member 150 covering the outer surface of the box assembly is omitted.

As shown in FIGS. 3 and 4, the box cover 120 is fixed to the opening end side of the box body 110 with screws so as to close at least part of the opening 113 of the box body 110 . An opening 123 of the box cover 120 communicates with the box body 110 . That is, the fixing hole 115 of the bottom wall 111 of the box body 110 faces the front side through the openings 113 and 123 . At this time, the coating allowance portion 122 protrudes forward from the front end face of the box body 110 by a predetermined protruding length.

The band-shaped member 130 is attached to the outer surface of the opening edge of the side wall 112 so as to protrude forward from the front surface of the box body 110, and covers the opening 113 of the box body 110 and the outer periphery of the frame portion 121 of the box cover 120 from the side. besieging. In particular, the fixed portion 131 of the belt-like member 130 is elastically adhered to the outer peripheral surface of the side wall 112 of the box body 110 without any gap. The fixed part 131 may be adhered to the outer peripheral surface of the side wall 112 with an adhesive. A protruding portion 132 protrudes forward from the front end surfaces of the box body 110 and the box cover 120 .

The annular member 140 is arranged radially inward of the belt-shaped member 130 . The ring-shaped member 140 is joined to the front surface of the box cover 120 and the inner peripheral surface of the belt-shaped member 130 (protruding portion 132 ) that protrudes forward from the front end surface (open end) of the box body 110 . Specifically, the rear adhesive surface 142 of the annular member 140 is adhered to the front surface of the frame portion 121 of the box cover 120 with an adhesive over the entire circumferential direction of the annular member 140, and the outer peripheral adhesive surface 143 is adhered to the outer peripheral surface of the side wall 112 of the box body 110 with an adhesive. A contact surface 141 of the annular member 140 faces the front surface so as to face the wall surface. In this embodiment, the contact surface 141 is located forward of the front end surface of the box main body 110 and the front end surface of the coating allowance portion 122 , but the contact surface 141 is located in front of the front end surface of the coating allowance portion 122 . may be coplanar with Moreover, in the present embodiment, the front end surface of the belt-shaped member 130 and the front end surface (contact surface 141) of the annular member 140 are on the same plane, but one of them may protrude more than the other. As will be described later, when the annular member 140 is compressed from the front surface, the annular member 140 is elastically deformed so as to expand radially inward and outward. Guide it to fall outward.

The sound insulating box 100 is constructed by attaching the sound insulating member 150 to the outer surface of the peripheral wall of the box body 110 of the box assembly and the outer peripheral surface of the fixed portion 131 of the strip member 130 . By making the peripheral wall of the box body 110 itself of a material having a relatively high sound insulation property, the installation of the sound insulation member 150 can be omitted.

7 and 8 show an arrangement structure 10' in which the sound insulating box 100 of this embodiment is installed behind the wall via supports 15 fixed to the construction material 13. FIG. This arrangement structure 10' is a structure before the wall 11 is erected.

As shown in FIGS. 7 and 8, a support 15 is fixed to the construction material 13 so as to support the sound insulation box 100 at a predetermined position. The support 15 is a strip of metal bent into an L-shape. The support 15 includes a fixed piece 15a fixed to the construction material 13, and a support piece 15b extending in the longitudinal direction substantially perpendicularly from the fixed piece 15a. A sound insulating box 100 is supported at a predetermined position in the longitudinal direction of the support piece 15b. Specifically, screws pass through the bottom wall 111 and the sound insulating member 150 through the fixing holes 115 of the box body 110 of the sound insulating box 100, thereby fixing the sound insulating box 100 to the support piece 15b. It should be noted that the operation of screwing in the screws can be easily performed from the front side of the wall through the opening 123 of the box cover 120 (even after the wall 11 is erected). In the arrangement structure 10 ′, the front end surface of the coating margin 122 of the sound insulating box 100 is arranged at a position that matches the wall surface of the wall 11 that is erected.

FIG. 9 shows an arrangement structure 10 in which a wall 11 is erected from the form of FIG. 8 and a through hole 12 is bored. Through the through hole 12, the opening 123 of the box cover 120 and the device fixing portion 124 face the wall surface, and the device 17 is attached from the wall surface.

In the arrangement structure 10, the front end surface of the coating margin 122 of the sound insulating box 100 and the wall surface of the wall 11 are substantially on the same plane, and the opening end of the box body 110 (the front surface of the frame portion 121 of the box body 110) ) is separated from the wall. Normally, when the belt-shaped member 130 and the annular member 140 are not present, sound leakage occurs through the gaps between them. Alternatively, if only the belt-shaped member 130 exists alone and the ring-shaped member 140 does not exist, it is difficult for the belt-shaped member 130 to fall uniformly over the entire circumference, and sound leakage occurs from the gaps that are created thereby. In the arrangement structure 10 of the present embodiment, the front end surfaces of the belt-shaped member 130 and the annular member 140 are in contact with the wall surface and elastically deformed integrally in the front-rear direction. In particular, the sponge-like annular member 140 is deformed so as to be crushed in the front-rear direction, and bulges radially inward and outward along the entire circumferential direction. Since the thin plate-like strip member 130 is joined to the annular member 140 at its inner peripheral surface, it deforms integrally with the annular member 140 and is bent radially outward. That is, the belt-like member 130 is evenly tilted radially outward along the entire circumferential direction as the annular member 140 is crushed and deformed. As a result, the front end surface of the belt-shaped member 130 is in close contact with the wall surface without a gap. Alternatively, even if there is some gap, the compressed annular member 140 closes the gap, thereby suppressing deterioration of sound insulation. Although not shown, the wall may be filled with mortar or the like according to the coating allowance portion 122 .

The effects of the sound insulating box 100 according to one embodiment of the present invention will be described below.

According to the sound insulating box 100 of this embodiment, the inner peripheral surface of the band-shaped member 130 that surrounds the opening 113 of the box body 110 and the outer periphery of the box cover 120 and protrudes forward from the front surface of the box body 110 has self-restoring properties. is joined to the front surface of the box cover 120 via an elastic annular member 140 having a That is, since the annular member 140 is arranged inside the belt-shaped member 130, the belt-shaped member 130 is guided so as to bend outward when coming into contact with the wall surface. In particular, the annular member 140 is made of a foam material, and when it is pressed against the wall surface, it is crushed and expands radially outward, thereby more effectively guiding the belt-shaped member 130 from falling outward, and The member 130 can more reliably seal the open end of the sound insulating box and the walls. That is, in the sound insulating box 100, when the strip member 130 is brought into close contact with the wall surface, the band member 130 is uniformly deformed so as to bend outward (in the radial direction) of the opening 113 of the box body 110, thereby effectively suppressing the formation of a gap. can. In addition, since the annular member 140 itself is an elastic body having self-restoring properties, the annular member 140 seals the gap even in a situation where a gap may occur between the tip of the bent belt-shaped member 130 and the wall surface. can function as Therefore, the sound insulating box 100 of the present embodiment can more reliably seal the opening end of the sound insulating box 100 and the wall surface, and improve sound insulation.

[Another embodiment/modification]
The present invention is not limited to the above embodiments, and can take various embodiments and modifications. Another embodiment and modifications of the present invention will be described below. It should be noted that, in each embodiment, constituent elements having the same last two digits among the constituent elements indicated by three digits have the same or similar features unless otherwise described, and the description thereof will be partially omitted.

(1) In the above embodiment, the belt-shaped member is directly attached to the outer surface of the side wall of the box body, and the sound insulation member is attached to the outside thereof. However, the sound insulation box of the present invention is not limited to the above embodiment. In the sound insulating box 200 shown in FIG. 10, the sound insulating member 250 is integrally attached to the peripheral wall of the box body 210. As shown in FIG. The inner peripheral surface of the belt-shaped member 230 is joined to the outer surface of the sound insulation member 250 integrally forming the side wall 212 of the box body 210, and the annular member 240 is joined to the inner surface of the belt-shaped member 230 and the front surface of the box cover 220. . Alternatively, a sound insulation member may be provided on the inner surface side of the box body (not shown). Also, the sound insulation member may cover only the side walls of the box body from the inside and outside. That is, in the sound insulating box of the present invention, the band-shaped member and the annular member may be attached to the box body that is integrated with the sound insulating member in various forms.

(2) The sound insulating box of the present invention is not limited to the above embodiments, and its shape may be arbitrarily changed. For example, the coating margin may be omitted from the box cover. In the sound insulating box 300 and the arrangement structure 30 shown in FIG. 11, the open end of the box body 310 is arranged closer to the wall surface because there is no coating margin. As shown in FIG. 11, in the arrangement structure 30, the belt-like member 330 and the annular member 340 are elastically deformed more to seal the gap between the opening end of the box body 310 and the wall surface.

(3) The sound insulating box of the present invention is not limited to the above embodiments, and its shape may be changed arbitrarily. For example, the box cover may be configured to close the entire box body without forming an opening. In such a case, the opening may be formed in the box cover afterwards. Moreover, the shape of each member of the sound insulating box is not limited to the square shape as described above, and may be circular, oval, or other polygonal shapes, and may be selected from various shapes by those skilled in the art. obtain.

(4) The sound insulation box of the present invention is not limited to the above embodiments, and its configuration may be arbitrarily changed. For example, the belt-like member is hermetically adhered to the inner surface of the side wall of the box body, and the box cover is fixed to the front surface of the box body so as to sandwich the belt-like member between the inner surface of the side wall of the box body and the end surface of the box cover. good too.

(5) The sound insulating box of the present invention may be constructed to be fire resistant. That is, the box main body and the box cover may be made of metal, and the band member may be made of an elastic, thermally expandable material. For example, the thermally expandable material is a thermally expandable rubber, and when this thermally expandable rubber is exposed to high heat (for example, 300 ° C. or higher), the volume expands to more than twice the volume before heating (expanded graphite). is mixed, and the rubber is formed into a predetermined shape (which has undergone a molding process) and undergoes a vulcanization process.

The present invention is not limited to the above-described embodiments and modifications, and can be implemented in various forms within the technical scope of the present invention.

10 Arrangement Structure 11 Wall 12 Through Hole 13 Building Material 15 Supporting Tool 15a Fixing Piece 15b Supporting Piece 17 Apparatus 100 Sound Insulating Box 110 Box Body 111 Bottom Wall 112 Side Wall 113 Opening 115 Fixing Hole 116 Cover Fixing Part 120 Box Cover 121 Frame Part 122 Coating margin 123 Opening 124 Instrument fixing part 125 Screw hole 130 Belt-shaped member 131 Fixing part 132 Protruding part 140 Annular member 141 Contact surface 142 Rear adhesive surface 143 Outer peripheral adhesive surface 150 Sound insulation member 151 Damping layer 152 Restrictive layer

Claims (6)

a bottomed box-shaped box body having an opening in the front and a peripheral wall consisting of a bottom wall and a side wall;
a box cover having an instrument fixing portion for attaching an instrument and attached to the opening side of the box body so as to close at least part of the opening;
an elastic band-shaped member attached to the side wall so as to surround the opening of the box body and the outer periphery of the box cover and protrude forward from the front surface of the box body;
an elastic annular member having self-restoring properties joined to the front surface of the box cover and the inner peripheral surface of the belt-shaped member projecting forward from the front surface of the box body;
A sound insulating box comprising: 2. The sound insulating box according to claim 1, further comprising a sound insulating member made of a sound insulating material and covering at least side walls of the box body. The box cover is formed with a coating margin projecting forward from the front surface of the box cover, and the front end surfaces of the belt-shaped member and the annular member are positioned on the same plane as the front surface of the coating margin, Alternatively, the sound insulating box according to claim 1 or 2, wherein the box is formed so as to protrude from the front surface of the coating margin. 4. The sound insulating box according to any one of claims 1 to 3, wherein the annular member is crushable and deformable so as to bulge radially inward and outward when pressed against a wall surface. 5. The sound insulating box according to any one of claims 1 to 4, wherein the width of the annular member is larger than the width of the strip member. 6. The sound insulating box according to any one of claims 1 to 5, wherein the annular member is made of foam material.

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