JP6212166B2 - Sound insulation cover and sound insulation structure - Google Patents

Description

  The present invention relates to a sound insulation cover and a sound insulation structure installed on a wall of a building.

  For example, in a lightweight partition wall as a wall of a building, in order to prevent sound leakage through a wall hole where the wiring device is installed, the wiring device is installed using a sound insulating cover having sound insulation properties. (For example, refer to Patent Document 1). As shown in FIG. 8, the wiring box 80 includes a box cover 81 formed in a bottomed box shape having an opening 81 a on one side by a sound insulating material, and a box 82 accommodated in the box cover 81. Is formed. The box cover 81 has a housing portion 88 that is surrounded by a bottom portion 86 and a peripheral wall 87, and a flange 89 that extends outward from the front surface of the peripheral wall 87. The box cover 81 has a function of blocking sound from the outside to the inside or from the inside to the outside.

  The box 82 includes a bottom wall 83 and a peripheral wall 84 erected on the periphery of the bottom wall 83. The box 82 is formed in a box shape having a box opening 85 surrounded by a peripheral wall 84. The wiring box 80 having the above-described configuration is attached to the lightweight steel member 90 and is installed on the back side of the lightweight partition wall 91. The box cover 81 covers the entire outer surface of the box 82, and the front surface of the flange 89 is in close contact with the back surface of the lightweight partition wall 91. For this reason, the gap between the lightweight partition wall 91 and the box 82 is closed by the box cover 81, and the sound insulation of the installation location of the wiring box 80 is improved in the lightweight partition wall 91.

JP 2009-11061 A

  However, the wiring box 80 is attached to the lightweight steel member 90 before the lightweight partition wall 91 is constructed. For this reason, the box cover 81 is disposed on the back side of the lightweight partition wall 91 before the lightweight partition wall 91 is constructed. Therefore, if the lightweight partition wall 91 is constructed, the installation state of the wiring box 80 on the back side of the lightweight partition wall 91 cannot be confirmed. For this reason, it cannot be confirmed whether the flange 89 is in contact with the back surface of the lightweight partition wall 91 or whether the box cover 81 covers the box 82. Further, even if sound leakage occurs after the wiring device is installed on the lightweight partition wall 91 without using the box cover 81, the box cover 81 is placed on the back side of the lightweight partition wall 91 so as to cover the outside of the box 82. It cannot be installed.

  This invention is made | formed in view of the said conventional problem, Comprising: The objective is to provide the sound insulation cover and sound insulation structure which can be installed from the front side of a wall.

In order to solve the above problems, the invention described in claim 1 is a sound insulation cover installed on a wall of a building, and has a cover body formed of a soft material having a specific gravity of 2 or more and having sound insulation properties. The cover body has an opening on the front surface, and a flange portion extending outwardly from the front surface of the cover body is formed in a box shape in which an instrument installed on the wall can be accommodated from the opening. The cover body is inserted into the wall hole from the front side of the wall, the cover body is accommodated inside the wiring box facing the front side of the wall through the wall hole on the back side of the wall, and the flange portion is The flange portion is disposed at the periphery of the wall hole on the surface of the wall, and the flange portion is formed with a thickness that does not affect the installation of the installation member on the surface of the wall, and is formed thinner than the cover body. Close The the gist.

The gist of the invention described in claim 2 is that, in the sound insulation cover according to claim 1, the flange portion is transparent .

The gist of the invention described in claim 3 is the sound insulation cover according to claim 1 or 2 , wherein at least the cover main body is formed by bending and joining sheet materials.

The gist of the invention described in claim 4 is that, in the sound insulation cover according to claim 3 , the sheet material includes a closing portion that closes a gap between adjacent surfaces in the joint portion of the cover body.

The invention according to 請 Motomeko 5, while being placed on the back side of the wall of a building, a wiring box facing the front side of the wall through the wall hole formed in the wall, through the wall hole the A sound insulation structure that suppresses sound leakage to the back side of the wall, wherein the sound insulation cover has a cover body that is formed of a soft material having a specific gravity of 2 or more, and has a sound insulation property. The front surface has an opening, the device installed on the wall is formed in a box shape that can be accommodated in the interior from the opening, and further includes a flange portion extending outward from the front surface of the cover body, A cover body is accommodated in the wiring box from the front side of the wall through the wall hole, the flange portion is disposed on a peripheral edge of the wall hole on the surface of the wall, and the flange portion is a surface of the wall. Installation of installation parts Together are formed with a thickness not affected, the thinly formed than the cover main body, said sound insulation cover is summarized in that that closing the wall hole.

  According to this invention, it can install from the front side of a wall.

The perspective view which shows the wiring box, box cover, and sound insulation cover of embodiment. (A) is a development view showing a sound insulation cover, (b) is a side view of the sound insulation cover. (A) is a front view which shows a sound insulation cover, (b) is a side view which shows a sound insulation cover. The perspective view which shows the state which fixed the wiring box to the lightweight shape steel material. Sectional drawing which shows the state which attached the conduit connector to the wiring box and connected the conduit. Sectional drawing which shows the sound insulation structure which installed the sound insulation cover. The perspective view which shows another example of a sound insulation cover. The figure which shows background art.

Hereinafter, an embodiment of a sound insulation cover and a sound insulation structure embodying the present invention will be described with reference to FIGS.
First, the wiring box 11 disposed outside the sound insulation cover 21 will be described.

  As shown in FIG. 1, the wiring box 11 is formed in a bottomed square box shape having a box opening S on one surface. In detail, the wiring box 11 made of a metal material is formed of a rectangular bottom wall 12 and a box peripheral wall 13 erected from the periphery of the bottom wall 12, and the box opening S is a box. It is surrounded by a peripheral wall 13 for use. The box peripheral wall 13 includes an upper side wall 13a and a lower side wall 13b made of a pair of opposed short side walls, and a right side wall 13c and a left side wall 13d made of a pair of opposed long side walls. Two connection ports 15 through which the cable 40 (see FIG. 4) can be inserted are formed in the upper side wall 13a and the lower side wall 13b. Each connection port 15 is closed by a knock portion 14.

  As shown in FIG. 4, a conduit 60 as a pipe can be attached to the wiring box 11 using a conduit connector 50. The conduit 60 is formed into a flexible pipe shape with a synthetic resin material, and is formed in an uneven shape in the axial direction. When the conduit 60 is inserted into the conduit connector 50, the conduit 60 is connected to the conduit connector 50.

  As shown in FIG. 1, a boss portion 19 is formed on the right side wall 13c side on the inner surface of the upper side wall 13a, and a boss portion 19 is formed on the left side wall 13d side on the inner surface of the lower side wall 13b. . Each boss portion 19 is formed with a screw hole 19a, and the box cover 16 is attached to the wiring box 11 using the screw hole 19a.

  The box cover 16 is formed in a rectangular frame shape that is slightly larger than the box opening S. In the frame portion 17 of the box cover 16, cover mounting holes 17 b are formed in the end portions in the length direction of the respective side portions 17 a in a pair of opposing side portions 17 a.

  As shown in FIG. 4, a cover mounting screw 18 is inserted into the cover mounting hole 17 b, and the cover mounting screw 18 is screwed into a screw hole 19 a of the boss portion 19. The box cover 16 is attached to the wiring box 11 by screwing the cover mounting screw 18 into the screw hole 19a. In the box cover 16, an instrument mounting hole 17c is formed at the center in the length direction of the pair of side portions 17a.

  As shown in FIG. 1, in the wiring box 11, an insertion hole 12 a is formed in the bottom wall 12. As shown in FIG. 6, the wiring box 11 is fixed to the box fixture 70 by a fixing member 56 (screw) inserted through the insertion hole 12a. As shown in FIG. 4, the box fixture 70 is formed of a fixed piece 71 fixed to the side surface of the lightweight steel P and a support piece 72 extending from the fixed piece 71. The support piece 72 is formed with a screw hole (not shown) into which the fixing member 56 can be forcibly screwed.

Next, the configuration of the sound insulation cover 21 will be described.
As shown in FIGS. 1 and 3, the sound insulation cover 21 has a cover body 25 formed in a bottomed square box shape having an opening 20 a on the front surface, and extends outward from the front surface of the cover body 25. And a flange portion 26. The cover main body 25 is erected from the bottom sound insulating part 24 formed in a rectangular shape, the upper sound insulating part 24 a erected from the upper edge of the bottom sound insulating part 24, and the lower edge of the bottom sound insulating part 24. It consists of a lower sound insulation part 24 b, a right sound insulation part 24 c erected from the right edge of the bottom sound insulation part 24, and a left sound insulation part 24 d erected from the left edge of the bottom sound insulation part 24. In the cover main body 25, the upper sound insulation part 24a and the left sound insulation part 24d, the left sound insulation part 24d and the lower sound insulation part 24b, the lower sound insulation part 24b and the right sound insulation part 24c, and the right sound insulation part 24c and the upper sound insulation part 24a are respectively They are joined using a closing member 29.

  The closing member 29 is formed in the shape of an elongated square column by using a foamable material. Then, one side surface of the blocking member 29 is joined to one inner surface of the adjacent sound insulating portion, and another other side surface adjacent to one side surface of the closing member 29 is joined to the inner surface of the other sound insulating portion. Thus, adjacent sound insulation parts are joined via the closing member 29. For example, in the upper sound insulation part 24a and the left sound insulation part 24d, one side surface of the blocking member 29 is joined along the side edge of the upper sound insulation part 24a to the inner surface of the upper sound insulation part 24a on the left sound insulation part 24d side. . The other side surface of the blocking member 29 is joined to the inner side surface of the left sound insulating portion 24d on the upper sound insulating portion 24a side along the side edge of the left sound insulating portion 24d. And the junction part of the adjacent upper side sound insulation part 24a and the left side sound insulation part 24d is obstruct | occluded from the inner side of the cover main body 25 by the closure member 29, and the clearance gap is not formed. The closing member 29 is provided from the bottom sound insulating portion 24 of the cover body 25 to the opening end.

  As shown in FIG. 1 and FIG. 3B, trapezoidal covering pieces 28 are integrally formed on both side edges along the direction extending from the bottom sound insulating portion 24 in the upper sound insulating portion 24a and the lower sound insulating portion 24b. Is formed. Each covering piece 28 is covered from the upper sound insulating part 24a and the lower sound insulating part 24b to the right sound insulating part 24c and the left sound insulating part 24d, and is joined to the right sound insulating part 24c and the left sound insulating part 24d. And by each covering piece 28, the junction part of an adjacent sound insulation part is obstruct | occluded from the outer side, and the clearance gap is not formed.

  In the upper sound insulation part 24a, an upper flange forming piece 26a is integrally provided at the edge farthest from the bottom sound insulation part 24, and at the edge farthest from the bottom sound insulation part 24 in the lower sound insulation part 24b. The lower flange forming piece 26b is integrally provided. Similarly, in the right sound insulation portion 24c, the right flange forming piece 26c is integrally provided at the edge farthest from the bottom sound insulation portion 24, and the end farthest from the bottom sound insulation portion 24 in the left sound insulation portion 24d. A left flange forming piece 26d is integrally provided at the edge.

  And each flange formation piece 26a-26d is formed so that thickness may be thinner than each sound insulation part 24a-24d while it is provided so that it may orthogonally cross with respect to each sound insulation part 24a-24d, respectively. Furthermore, each flange formation piece 26a-26d is formed with the transparent resin material. Further, the upper flange forming piece 26a and the left flange forming piece 26d, the left flange forming piece 26d and the lower flange forming piece 26b, the lower flange forming piece 26b and the right flange forming piece 26c, the right flange forming piece 26c and the upper flange forming piece. As for 26a, the side edges which face each other are joined. The upper flange forming piece 26a, the left flange forming piece 26d, the lower flange forming piece 26b, and the right flange forming piece 26c are integrally joined to form a square annular flange portion 26. A through hole 30 is formed in the upper flange forming piece 26a and the lower flange forming piece 26b. The opening 20a of the sound insulation cover 21 having the above configuration is surrounded by four sound insulation parts 24a to 24d.

  In the sound insulating cover 21 configured as described above, the cover main body 25 is formed of a soft material having sound insulating properties. The soft material forming the cover body 25 is adjusted to a specific gravity of 2 or more by adding a high specific gravity material to rubber or elastomer. As shown in FIG. 6, in the state where the sound insulation cover 21 is installed on the lightweight partition wall W, the sound insulation cover 21 is entirely covered with the decorative plate 44, and the wiring device 42 is accommodated inside the cover body 25. The If the sound insulating cover 21 can simply exhibit the sound insulating properties, the cover main body 25 (the bottom sound insulating portion 24 and the sound insulating portions 24a to 24d) may have a sufficient thickness. However, if the cover body 25 is too thick, it becomes difficult to cover the sound insulating cover 21 with the decorative plate 44 as described above and to house the wiring device 42 in the cover body 25. Therefore, by setting the specific gravity of the soft material to 2 or more, it is possible to cover the sound insulating cover 21 with the decorative plate 44 and to accommodate the wiring device 42 in the cover main body 25 while making the cover main body 25 sound insulating. I have to. The cover body 25 of the sound insulation cover 21 is not formed with a through hole, a slit, or the like, and has a function of blocking sound from the outside of the cover body 25 to the inside or from the inside to the outside.

  As shown in FIGS. 2A and 2B, the sound insulation cover 21 is formed by forming the soft material sheet material, cutting the sheet material into a substantially cross shape, and the bottom sound insulation portion 24 and the four sound insulation covers 24. The sound insulation portions 24a to 24d are formed, and the flange formation pieces 26a to 26d are joined to the end portions of the four sound insulation portions 24a to 24d. Further, the closing member 29 is bonded in advance to the inner side surfaces of the right sound insulating portion 24c and the left sound insulating portion 24d, and when the cover body 25 is formed by bonding the sheet material, the closing member 29 is bonded to the adjacent sound insulating portion. Is done. And before accommodating in the wiring box 11, the sound insulation cover 21 is not formed in a box shape, but is stored in a sheet shape.

Next, the lightweight partition wall W as a building wall where the wiring box 11 is installed will be described.
As shown in FIG. 5, the lightweight partition wall W is erected by being fixed so as to sandwich a plurality of lightweight shaped steel materials P (only one lightweight shaped steel material P is shown in FIG. 5) and the lightweight shaped steel materials P. It is constructed from the wall material Wa. Gypsum board is used for the wall material Wa. The light-weight shaped steel P is a C-shaped steel made of a thin steel plate and having a substantially C-shape in a cross-sectional view in a direction orthogonal to the standing direction of the light-weight shaped steel P. In order to construct the lightweight partition wall W, first, a plurality of lightweight steel members P are erected. Next, when the wall material Wa to be paired is disposed so as to sandwich the light-weight shaped steel material P, and the wall material Wa is fixed to the light-weight shaped steel material P with screws, the light-weight partition wall W is constructed. In this lightweight partition wall W, a hollow portion T is formed between the pair of wall materials Wa.

Next, the operation of the sound insulation cover 21 and the sound insulation structure will be described together with the installation of the wiring device 42.
As shown in FIGS. 4 and 5, the box fixture 70 is fixed to the light-weight shaped steel P. Then, the fixing member 56 inserted into the insertion hole 12a of the wiring box 11 is screwed into the support piece 72 of the box fixture 70 fixed to the lightweight steel P, so that the wiring box 11 supports the support piece 72. And attached to the light-weight shaped steel P. Furthermore, the conduit connector 50 is connected to the connection port 15 of the wiring box 11, the conduit 60 is connected to the conduit connector 50, and the cable 40 is inserted into the conduit 60. Then, the cable 40 is pulled into the wiring box 11.

  Next, as shown in FIG. 5, the wall material Wa is erected so as to sandwich the lightweight steel material P. Then, the wiring box 11 is disposed on the back side of the wall material Wa. Next, the wiring box 11 installed on the back side of the wall material Wa is detected, the wall material Wa is cut out using a cutting tool (not shown), a wall hole Wb is formed in the wall material Wa, and the wiring box 11 box openings S face the front side of the wall material Wa, and the cable 40 is pulled out to the front side of the wall material Wa.

  Next, as shown in FIG. 6, a cut is made in the upper sound insulation portion 24a of the sound insulation cover 21, and the cable 40 is inserted into the cut. Then, the upper sound insulation part 24a is elastically deformed, and the insertion of the cable 40 into the cover main body 25 is allowed, and the part cut by returning the upper sound insulation part 24a to the original shape is in close contact with the cable 40. .

  Next, the cover body 25 of the sound insulating cover 21 is inserted into the wall hole Wb from the front side of the wall material Wa, and the cover body 25 is accommodated in the wiring box 11. And the rear surface of the flange part 26 is made to contact | abut to the circumference | surroundings of the wall hole Wb in the surface of wall material Wa. Then, the wall hole Wb is closed by the flange portion 26, and a sound insulation structure is formed in the lightweight partition wall W. Thereafter, the wiring device 42 is held by the holding frame 43, and the frame mounting member 31 that has passed through the holding frame 43 is threaded into the device mounting hole 17 c of the box cover 16 through the through hole 30 of the flange portion 26. . Then, the holding frame 43 is attached to the front side of the wall material Wa while being pressed against the front surface of the flange portion 26, and the wiring device 42 is installed on the wall material Wa. Thereafter, a decorative plate 44 as an installation member is installed on the front side of the wall material Wa so as to cover the entire holding frame 43 and the entire flange portion 26. The decorative plate 44 has an instrument hole 44 a, the wiring instrument 42 is inserted into the instrument hole 44 a, and the operation surface of the wiring instrument 42 is exposed on the surface side of the decorative plate 44.

  In a state where the wiring device 42 is installed on the lightweight partition wall W, the sound insulation cover 21 covers the outer surface of the wiring device 42 from the inside of the wiring box 11, and the sound insulation cover 21 as a whole covers the wall hole Wb. For this reason, even if sound leaks from the gap between the appliance hole 44a of the decorative plate 44 and the wiring appliance 42 or the clearance in the wiring appliance 42 to the back side of the wall material Wa, the sound is prevented by the sound insulation cover 21 and the sound insulation structure. Leakage to the outside of the wiring box 11 is suppressed, and sound leakage to the back side of the wall material Wa is suppressed.

According to the above embodiment, the following effects can be obtained.
(1) The sound insulating cover 21 is formed from a box-shaped cover main body 25 and a flange portion 26 formed on the front surface of the cover main body 25. The cover body 25 is formed so as to be insertable into the wall hole Wb from the front side of the wall material Wa, and the flange portion 26 is formed so as to be disposed on the periphery of the wall hole Wb on the surface of the wall material Wa. Therefore, even if the sound insulation cover 21 is inserted into the wall hole Wb from the front side of the wall material Wa, the wall hole Wb is closed by the entire sound insulation cover 21 and sound leakage to the back side of the wall material Wa through the wall hole Wb is prevented. It can be suppressed by the sound insulation cover 21. Therefore, even after the construction of the lightweight partition wall W, the sound insulation cover 21 can be installed on the wall material Wa while confirming the installation state of the sound insulation cover 21.

  (2) Since the cover body 25 of the sound insulation cover 21 is made of a soft material having a specific gravity of 2 or more to provide sound insulation, the thickness of the cover body 25 can be reduced. Therefore, the space within the cover main body 25 is prevented from being narrowed by the cover main body 25 itself having sound insulation, and a space for accommodating the wiring device 42 can be secured.

  (3) The cover body 25 of the sound insulation cover 21 is formed of a soft material. For this reason, when the cable 40 is inserted into the cover main body 25, the cut-out portion of the cover main body 25 is elastically deformed and is in close contact with the cable 40. For this reason, the sound leakage from the part in which the cable 40 is inserted in the cover main body 25 can be suppressed.

  (4) The flange portion 26 is made thinner than the cover body 25. For this reason, even if the decorative plate 44 is installed on the front side of the flange portion 26, the amount by which the decorative plate 44 floats from the wall material Wa can be suppressed. Even if the flange portion 26 is interposed between the surface of the wall material Wa and the decorative plate 44, the flange portion 26 is hardly noticeable, and the aesthetic appearance of the installation place of the wiring device 42 is not impaired.

  (5) The flange portion 26 was made transparent. Therefore, when the decorative plate 44 is installed on the front side of the flange portion 26 on the front side of the wall material Wa, even if the flange portion 26 is interposed between the surface of the wall material Wa and the decorative plate 44, the flange portion 26 is not conspicuous, and the aesthetic appearance of the installation place of the wiring device 42 is not impaired.

  (6) The sound insulation cover 21 is formed by bending a sheet material made of a soft material and integrating the flange forming pieces 26a to 26d into a box shape. Therefore, before the sound insulation cover 21 is shaped into a box shape, the sound insulation cover 21 is formed into a sheet shape, so that the plurality of sound insulation covers 21 can be stacked and stored and transported. Therefore, compared with the case where the sound insulation cover 21 is formed in a box shape, the storage property and the transportability can be improved.

  (7) In the sound insulation cover 21, adjacent sound insulation portions 24a to 24d are joined from the inside of each sound insulation portion 24a to 24d by a blocking member 29 having a quadrangular prism shape. For this reason, in the position used as the corner | angular part of the cover main body 25, a junction part can be obstruct | occluded from an inner side by the closure member 29, and the leak of the sound from the joint (corner | corner part) of the sound-insulation cover 21 can be prevented. .

  (8) In the sound insulation cover 21, the covering piece 28 is extended in the upper sound insulation part 24a and the lower sound insulation part 24b. And each covering piece 28 is joined to the outer surface of these right sound insulation parts 24c and left sound insulation parts 24d so that it may straddle right sound insulation parts 24c and left sound insulation parts 24d, respectively. Therefore, at the position that becomes the corner of the cover main body 25, the joint can be closed from the outside by the covering piece 28, and sound leakage from the joint (corner) of the sound insulating cover 21 can be prevented.

(9) The closing member 29 is made of a foamable material. For this reason, sound leakage from the joint portion of the cover main body 25 can be suitably prevented while making the closing member 29 lightweight.
(10) The sound insulation cover 21 is formed from a box-shaped cover body 25 and a flange portion 26 formed on the front surface of the cover body 25. Then, the cover body 25 is accommodated in the wiring box 11 from the front side of the wall material Wa through the wall hole Wb, and the sound insulation structure is provided by arranging the flange portion 26 on the periphery of the wall hole Wb on the surface of the wall material Wa. Formed. Therefore, even if the sound insulation cover 21 is inserted into the wall hole Wb from the front side of the wall material Wa, the wall hole Wb is closed by the entire sound insulation cover 21 and sound leakage to the back side of the wall material Wa through the wall hole Wb is prevented. The sound insulation cover 21 can suppress the sound insulation structure even after the construction of the lightweight partition wall W.

In addition, you may change the said embodiment as follows.
As shown in FIG. 7, the sound insulation cover 75 is formed in a square box shape by a cover member 76 formed of a thin transparent material (for example, a synthetic resin material) and a soft material having a specific gravity of 2 or more. The cover main body 77 housed in 76 may be integrated. The cover member 76 includes a housing portion 76a formed in a bottomed square box shape, and a flange portion 76b integrally formed on the front surface of the housing portion 76a. The cover body 77 is formed in a bottomed square box shape and has sound insulation. And by accommodating the cover main body 77 in the accommodating part 76a of the cover member 76, the sound insulation cover 75 is formed by the thin plate-like flange part 76b and the cover main body 77 made of a soft material in the accommodating part 76a. Can do.

  In the sound insulation cover 75 shown in FIG. 7, the cover main body 77 is formed using a soft material having a specific gravity of 2 or more and a flame-retardant or fire-resistant sheet-like material (hereinafter referred to as a fire-resistant material). May be. The cover body 77 is formed by forming the sheet-like refractory material into a bottomed square box shape, and is accommodated in the accommodating portion 76a. If comprised in this way, when the cable 40 is drawn in in the cover main body 77 through the accommodating part 76a, a refractory material will contact | connect the cable 40 closely. For this reason, in addition to being able to suppress sound leakage from the portion of the cover main body 77 where the cable 40 is inserted, the cover main body 77 can be provided with flame retardancy or fire resistance.

  In the embodiment, the closing member 29 is formed of a foamable material. However, the closing member 29 may not be a foamable material, and if the sound leakage from the cover body 25 can be prevented, the material of the closing member 29 is You may change suitably.

  In the embodiment, the joint portion of the cover main body 25 is closed by the closing member 29. However, instead of the closing member 29, the joint portion of the cover main body 25 is closed by applying an adhesive or by attaching a sound insulating tape. May be blocked.

In the embodiment, the thickness of the flange portion 26 is made thinner than the thickness of the cover main body 25, but the thickness of the flange portion 26 may be the same as the thickness of the cover main body 25.
In embodiment, the flange part 26 was formed transparently, However, The flange part 26 may be white or yellow, and may be the same color as wall material Wa.

  In the embodiment, the sound insulation cover 21 is accommodated in the wiring box 11, the wiring device 42 is attached to the wiring box 11, and the wiring device 42 is installed on the lightweight partition wall W. 42 may be attached to the sound insulation cover 21. That is, the sound insulation cover 21 may be used as a wiring box.

  In the embodiment, the flange forming pieces 26a to 26d are integrated with the cover body 25 at the same time as the assembly of the cover body 25 to form the flange portion 26. However, the flange portion 26 formed in a square ring shape may be integrated with the cover body 25. .

In the embodiment, the bottom sound insulating part 24 and the four sound insulating parts 24a to 24d are joined to form the cover main body 25. However, the cover main body 25 may be formed in a box shape in advance.
O You may install the wiring apparatus 42 using the sound-insulation cover 21 on the earth wall as a wall of a building.

  In the embodiment, the cover body 25 is inserted into the wiring box 11 attached to the lightweight steel P using the box fixture 70 and the sound insulating cover 21 is used. However, the wiring attached directly to the wooden pole as a construction material The sound insulation cover 21 may be used by inserting the cover body 25 into the box 11.

  In the embodiment, the wiring box 11 made of a metal material is used, but the wiring box 11 made of a synthetic resin material may be used.

  W: Light partition wall as a wall, Wb: Wall hole, 11: Wiring box, 20a ... Opening part, 21, 75 ... Sound insulation cover, 25, 77 ... Cover body, 26, 76b ... Flange part, 29 ... Closure member, 42... Wiring device as a device, 44... Decorative plate as an installation member, 76 a.

Claims (5)

A sound insulation cover installed on the wall of the building,
A cover body formed of a soft material having a specific gravity of 2 or more and having sound insulation,
The cover body has an opening on the front surface, and a device installed on the wall is formed in a box shape that can be accommodated from the opening,
A flange portion extending outward from the front surface of the cover body;
The cover body is inserted into a wall hole from the front side of the wall, the cover body is accommodated inside a wiring box facing the front side of the wall through the wall hole on the back side of the wall, and the flange portion is formed on the wall. Arranged on the periphery of the wall hole on the surface;
The sound insulation cover for closing a wall hole, wherein the flange portion is formed with a thickness that does not affect the installation of the installation member on the surface of the wall and is formed thinner than the cover body .   The sound insulation cover according to claim 1, wherein the flange portion is transparent. The sound insulation cover according to claim 1 or 2 , wherein at least the cover body is formed by bending and joining sheet materials. The sound insulating cover according to claim 3 , wherein the sheet material includes a closing member that closes a gap between adjacent surfaces in a joint portion of the cover body. A wiring box that is installed on the back side of the wall of the building and faces the front side of the wall through a wall hole formed in the wall;
A sound insulation structure for suppressing sound leakage to the back side of the wall through the wall hole,
The sound insulation cover has a cover body formed of a soft material having a specific gravity of 2 or more and having sound insulation properties,
The cover body has an opening on the front surface, and a device installed on the wall is formed in a box shape that can be accommodated from the opening,
Furthermore, a flange portion extending outward from the front surface of the cover body is provided,
The cover main body is accommodated in the wiring box from the front side of the wall through the wall hole, and the flange portion is disposed on a peripheral edge of the wall hole on the surface of the wall,
The sound insulation cover closes a wall hole, wherein the flange portion is formed with a thickness that does not affect the installation of the installation member on the surface of the wall and is formed thinner than the cover body. Sound insulation structure.

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