JP2009011061A - Wiring box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiring box inexpensively the installation work of which can be easily carried out, while improving the sound insulation properties in a setting place. <P>SOLUTION: The wiring box 10 includes: a box cover 21 formed of a sound insulation material having no fire resistant property into a bottomed box shape having an opening part 20a on one surface; and a box-shaped box 11 equipped with the circumferential walls 13 which are installed on the rear wall of a light weight partitioning wall and erected on the bottom wall 12 and the circumferential edges of the bottom wall 12 and having a box opening part S surrounded by and formed of the circumferential walls 13. In the wiring box 10, the box cover 21 is integrated with the box 11 by covering the entire outer surface of the box 11 while opening the box opening part S. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wiring box provided with a box cover having sound insulation properties.

  A lightweight partition wall as a building wall is constructed by erecting a light-weight shaped steel material and erecting a wall material (for example, a gypsum board) so as to sandwich the light-weight shaped steel material. The lightweight partition wall has a hollow portion formed between the pair of wall materials, and the lightweight partition wall is a hollow wall. In order to install the wiring device on the lightweight partition wall, a bottomed square box-like wiring box having an opening on the front surface is installed on the back side of the lightweight partition wall. The installation of the wiring apparatus using this wiring box is performed as follows. That is, before the construction of the lightweight partition wall (before the wall material is erected), the wiring box is fixed to the lightweight steel material, and the cable is drawn into the wiring box. After the wall material is erected, a through hole is formed at a position corresponding to the opening of the wiring box in the wall material, and after the cable is drawn out from the through hole to the wall surface side, the connection work of the wiring device to the cable is performed, By attaching the wiring device to the wall material, the wiring device is installed on the lightweight partition wall.

  The lightweight partition wall constructed as described above has a problem in that sound leaks through the through-hole that is a place where the wiring box is installed, and the sound insulation performance is lowered. Therefore, Patent Document 1 discloses a structure that improves sound insulation at a place where a wiring box is installed. This structure is formed by covering the outer surface, the inner surface, or both the inner and outer surfaces of the wiring box with a sheet-like heat-resistant sealing material having sound insulation properties, and installing the wiring box. Specifically, the wiring box is fixed by bolts and nuts to a support fitting fixed to the construction material in a state where the outer surface is covered with a sheet-like heat-resistant sealing material. In addition, the front edge of the sheet-like heat-resistant sealing material is in contact with the back surface of the wall material around the through hole. For this reason, the clearance gap between a wall material and a wiring box is block | closed with a sheet-like heat-resistant sealing material, and the sound-insulating property of the installation location of a wiring box improves.

Further, Patent Document 2 discloses an outlet cover and an attachment method for attaching a switch box and an outlet in consideration of soundproofing or sound insulation on a wall surface of a building. The outlet cover of Patent Document 2 is formed by folding a outlet cover material sheet having soundproofing or sound insulating properties to form a box, and includes a box part and a flange part. The outlet cover is formed by folding the outlet cover material sheet at the construction site when the switch box is attached to the wall surface of the building. Thereafter, the box portion of the outlet cover is inserted into the opening formed on the wall surface, and the flange portion is fixed to the wall surface. A switch box is mounted in the outlet cover, and an opening formed in the wall surface is sealed by a flange portion, so that sound insulation or sound insulation on the wall surface is considered.
JP 2003-41683 A JP 2003-32832 A

  However, the structure improved in the sound insulation disclosed in Patent Document 1 has a problem that the sheet-like heat-resistant sealing material is expensive because it has fire prevention performance in addition to the function of improving the sound insulation. The sheet-like heat-resistant sealing material is a sheet-like heat-resistant sealing material generally used for fire prevention purposes. However, such putty-like heat-resistant sealing material hardens and deteriorates over time if it is installed in the wall with the outer surface of the wiring box covered, resulting in sound insulation at the location where the wiring box is installed. Will fall. In addition, in the outlet cover and the mounting method disclosed in Patent Document 2, the outlet cover is formed by folding the outlet cover material sheet during installation on the wall surface of the switch box or outlet, and after the outlet cover is fixed to the wall surface, The switch box is attached to the outlet cover. Therefore, when the outlet cover in Patent Document 2 is used, the installation work of the switch box in consideration of sound insulation is very troublesome.

  The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a wiring box that can easily perform the installation work while improving the sound insulation of the installation location. It is in.

  In order to solve the above-mentioned problems, the invention described in claim 1 is a box cover formed in a bottomed box shape having an opening on one side by a sound insulating material having no fireproof performance, and a wall of a building. And a box-like box having a bottom wall and a peripheral wall erected on the periphery of the bottom wall and having a box opening surrounded by the peripheral wall, and the box cover includes the box opening The gist is that the entire outer surface of the box is covered and the box is integrated with the box.

The gist of the invention according to claim 2 is that, in the wiring box according to claim 1, the box cover is formed in the shape of the bottomed box.
The invention according to claim 3 is the wiring box according to claim 1 or 2, wherein the outer surface of the bottom wall of the box and the inner surface of the bottom portion of the box cover are bonded. .

  Invention of Claim 4 is the wiring box as described in any one of Claims 1-3. Between the outer peripheral surface in the surrounding wall of the box, and the inner peripheral surface of the box cover, The gist is that a gap is formed over the entire outer periphery of the box.

  According to a fifth aspect of the present invention, in the wiring box according to any one of the first to fourth aspects, an insertion hole through which a cable can be inserted is formed in the peripheral wall of the box. The gist.

  The invention according to claim 6 is the wiring box according to any one of claims 1 to 5, wherein the box cover is formed of a material having a high specific gravity and bubbles. And

  The invention according to claim 7 is the wiring box according to any one of claims 1 to 6, wherein the box cover has a flange extending outward from the entire periphery of the opening. The gist is that it is formed.

  Invention of Claim 8 is the wiring box as described in any one of Claims 1-7, The said box cover is fixed to the construction material installed in the wall back of the said building The gist is to provide a fixing portion.

  ADVANTAGE OF THE INVENTION According to this invention, the wiring box which can perform the installation operation | work easily can be provided cheaply, improving the sound insulation of an installation location.

Hereinafter, an embodiment of a wiring box embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1A, the wiring box 10 is formed by integrating a box 11 made of a synthetic resin material having a square box shape and a box cover 21 having sound insulation. First, the configuration of the box 11 will be described. As shown in FIG. 1B, the box 11 is formed in a bottomed square box shape having a box opening S on one surface. Specifically, the box 11 is formed of a rectangular bottom wall 12 and a peripheral wall 13 erected from the periphery of the bottom wall 12. The box opening S is surrounded by a peripheral wall 13. The peripheral wall 13 includes an upper side wall 13a and a lower side wall 13b that are opposed to each other in the vertical direction in FIG. 1, and a right side wall 13c and a left side wall 13d that are opposed to the right and left in FIG. And the end surface by the side of the box opening part S in the surrounding wall 13 is located on the same plane, and the opening surface H1 of the box 11 is formed by the plane in which this end surface is located (refer the dashed-two dotted line of FIG.1 (b)). .

  Two insertion holes 15 through which the cable 40 (see FIG. 5) can be inserted are formed in the upper side wall 13a and the lower side wall 13b. One insertion hole 15 is closed by a knock part 14, the knock part 14 is not formed in the other insertion hole 15, and the other insertion hole 15 is formed as an opening. A boss portion 19 used to attach the wiring device 42 (see FIG. 6) to the box 11 is formed on the inner surfaces of the upper side wall 13a and the lower side wall 13b.

  Next, the configuration of the box cover 21 will be described. As shown in FIGS. 1A and 2, the box cover 21 is formed in a bottomed square box shape having an opening 20 a on one surface. The box cover 21 is formed of a material having a high specific gravity filled in olefin and having bubbles, such as a special olefin foam material. That is, the box cover 21 is formed of a sound insulating material that does not have fireproof performance, and the bubbles are fine bubbles so as not to lower the specific gravity of the sound insulating material. Since the sound insulating material forming the box cover 21 does not have fireproof performance, unlike the putty-like heat-resistant sealing material, even if the wiring box 10 is installed on the lightweight partition wall W, it does not harden or deteriorate over time.

  As shown in FIGS. 2 and 4, the box cover 21 is formed by integrally forming a bottom portion 22 formed in a rectangular shape and a peripheral wall 23 erected from the periphery of the bottom portion 22. The housing portion 24 is surrounded by the housing portion 23. In the box cover 21, the plane on which the end surface of the peripheral wall 23 on the opening 20 a side is located is the opening surface H 2 of the box cover 21, and the opening 20 a is formed so as to be surrounded by the peripheral wall 23 and open to the opening surface H 2. ing. The box cover 21 is not formed with a through hole or a slit penetrating the bottom 22 and the peripheral wall 23, and has a function of blocking sound from the outside to the inside or from the inside to the outside of the box cover 21.

  The peripheral wall 23 is formed so as to widen the opening width in the long side direction and the short side direction as it goes from the bottom part 22 toward the opening part 20a, and the accommodating part 24 is formed so as to expand as it goes from the bottom part 22 toward the opening part 20a. . That is, the peripheral wall 23 in the box cover 21 has a slope that is inclined from the bottom 22 toward the opening 20a. This gradient is formed by a draft for extracting a molding die for the box cover 21 when the box cover 21 is molded.

  Further, as shown in FIG. 1, a flange 26 is integrally formed around the opening 20 a of the box cover 21. The base end of the flange 26 is integrally formed with the open end of the box cover 21. The flange 26 is formed so as to extend from the entire circumference of the opening 20 a toward the outside of the box cover 21, and the front surface of the flange 26 is located on the opening surface H <b> 2 of the box cover 21. The flange 26 is formed so as to be able to tilt toward the side approaching the bottom portion 22 or the side away from the bottom portion 22 with the base end as the center.

  As shown in FIGS. 2 and 3, it is one wall portion of the peripheral wall 23 of the box cover 21, and a fixing portion 31 is attached to one of the pair of long side wall portions by a mounting screw 32. ing. When the fixing portion 31 is attached to the box cover 21 with the attachment screw 32, a hole (not shown) through which the attachment screw 32 passes is formed in the box cover 21, and one opening of the hole is an attachment screw. The other opening is closed by the fixing portion 31. For this reason, even if the fixing | fixed part 31 is provided in the box cover 21, the function which interrupts | blocks the sound from the outer side to the inner side of the box cover 21 or an inner side to an outer side does not fall.

  The fixing portion 31 is formed in an elongated plate shape from a synthetic resin material, and an attachment surface with respect to the box cover 21 and a surface facing away from the attachment surface 31b abut on a lightweight steel P (see FIG. 6) as a construction material. Is forming. The abutting surface 31b has a planar shape as a whole, and a part of the abutting surface 31b is cut out to be concave. In a state in which the fixing portion 31 is attached to the peripheral wall 23, both end portions in the length direction of the fixing portion 31 protrude from the outer surfaces of the pair of short side walls forming the peripheral wall 23. A fixing hole 31 a is formed through the fixing portion 31. Moreover, the protrusion part of the fixing | fixed part 31 is formed so that thickness may become thin from the attachment surface side to the box cover 21 to the contact surface 31b side to the lightweight steel P as it goes to each front-end | tip.

  As shown in FIGS. 1, 2, and 4, the box 11 is housed in the housing portion 24 from the opening 20 a of the box cover 21, and the outer surface of the bottom wall 12 is the bottom portion of the box cover 21. It is bonded to the inner surface of 22 with an adhesive. Therefore, the box 11 and the box cover 21 are integrated, and the wiring box 10 is formed. As shown in FIGS. 1A and 2, in the wiring box 10, the box cover 21 covers the entire outer surface of the box 11 accommodated in the accommodating portion 24. Further, the box 11 is accommodated from the bottom wall 12 side in the accommodating portion 24 of the box cover 21 so as to open the box opening S.

  Further, in the wiring box 10, the outer surfaces of the upper side wall 13a, the lower side wall 13b, the left side wall 13d, and the right side wall 13c of the box 11, that is, the outer peripheral surface of the box 11, and the inner peripheral surface of the peripheral wall 23 facing the outer peripheral surface. A slight gap K is formed between them. The gap K is formed between the outer peripheral surface of the peripheral wall 13 in the box 11 because a gradient is formed on the inner peripheral surface of the peripheral wall 23 in the box cover 21. Moreover, since the peripheral wall 23 in the box cover 21 has a gradient so as to expand from the bottom 22 side toward the opening 20a, the gap K gradually increases as it goes from the bottom 22 toward the opening 20a. . In the wiring box 10, the opening side of the box 11 does not protrude from the opening 20a of the box cover 21, and the opening surface H1 of the box 11 and the opening surface H2 of the box cover 21 are located on the same plane. ing.

  Next, the lightweight partition wall W as a wall of the building where the wiring box 10 is installed will be described. As shown in FIG. 6, the lightweight partition wall W stands up 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. 6) and the lightweight shaped steel materials P. It is constructed from the wall material Wa provided. The wall material Wa is a gypsum board. The light-weight shaped steel material 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 material 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, installation of the wiring device 42 using the wiring box 10 will be described. In addition, the light-weight shaped steel material P shall be erected in advance. In order to install the wiring box 10 on the lightweight partition wall W, first, as shown in FIG. 4, the flange 26 in the box cover 21 is tilted toward the side away from the bottom 22 with the base end as the center, The flange 26 is inclined so that the front end of 26 extends away from the bottom 22. Next, the wiring box 10 is fixed to the lightweight steel material P. That is, the fixing screws 33 are inserted into both the fixing holes 31 a of the fixing portion 31, and the fixing screws 33 are forcibly screwed into the lightweight steel material P. Then, the wiring box 10 is fixed to the lightweight steel material P via the fixing portion 31. In addition, when fixing the fixing | fixed part 31 to the lightweight shaped steel material P, the fixing | fixed part 31 is fixed to the position slightly retreated from the outer surface of the lightweight shaped steel P located in the side by which the wall material Wa used as the wall surface side is installed. . This is because the opening surface H2 of the box cover 21 is positioned on the same plane as the surface on the side where the wall material Wa is erected in the lightweight steel P.

  Next, as shown in FIG. 5, the cable 40 is inserted into the upper portion of the peripheral wall 23, and further inserted into the insertion hole 15 and drawn into the box 11. Note that when the cable 40 is inserted into the peripheral wall 23, the insertion of the cable 40 is assisted by making a cut at a position where the cable 40 is inserted with a cutting tool (not shown) or the like. When a cut is made in the peripheral wall 23 of the box cover 21, the cut is put in a position facing the insertion hole 15 in the peripheral wall 23. That is, a cut is made in the peripheral wall 23 of the box cover 21 at a position where the peripheral wall 13 of the box 11 does not exist. At this time, since the cutting tool that cuts the peripheral wall 23 of the box cover 21 contacts the inner peripheral surface of the insertion hole 15, the cutting tool is prevented from moving to a position far away from the insertion position of the cable 40. The Then, after inserting the cable 40 into the notch and inserting the cable 40 into the insertion hole 15, the notch is filled with a sealing material (for example, putty or caulking material).

  Next, the wall material Wa is erected so as to sandwich the lightweight steel material P. Then, the back surface of the wall material Wa comes into contact with the flange 26, and the wall material Wa is fixed to the light-weight shaped steel material P, whereby the flange 26 is pushed to the light-weight shaped steel material P side by the back surface of the wall material Wa. Tilt toward the side closer to the bottom 22 as the center. Then, since the flange 26 tries to return to the original shape, the flange 26 comes into pressure contact with the back surface of the wall material Wa. The entire outer surface of the box 11 is covered with the box cover 21, and the box cover 21 and the wall material Wa are closed with a flange 26. For this reason, the box 11 is blocked from the hollow portion T by the wall material Wa and the box cover 21.

  Next, the wiring box 10 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), and the through hole Wb is formed in the wall material Wa as shown in FIG. And the box 11 faces the wall front side. At this time, since the opening edge of the through hole Wb is along the inner surface of the box 11, the flange 26 of the box cover 21 covering the entire outer surface of the box 11 is in a state of being in pressure contact with the periphery of the through hole Wb in the wall material Wa. Maintained. Thereafter, the wiring device 42 is held by the holding frame 43, and the holding frame 43 is attached to the box 11 using the boss portion 19. When the wiring device 42 is accommodated in the box 11, the wiring device 42 is attached to the lightweight partition wall W. Installed.

  In a state where the wiring device 42 is installed on the lightweight partition wall W, the box cover 21 covers the entire outer surface of the box 11, and the flange 26 is pressed against the back surface of the wall material Wa around the through hole Wb. For this reason, the gap between the wall material Wa and the box 11 is closed by the box cover 21, and the sound insulation at the installation location of the wiring box 10 is improved in the lightweight partition wall W. Further, a gap K is formed between the outer peripheral surface of the box 11 and the inner peripheral surface of the box cover 21. For this reason, resonance between the box cover 21 and the box 11 is prevented.

According to the above embodiment, the following effects can be obtained.
(1) The box cover 21 that forms the wiring box 10 is made of a sound insulating material that does not have fireproof performance. For this reason, the wiring box 10 can be manufactured at a lower cost than when the box cover 21 is formed of a material having sound insulation performance and fire prevention performance. In addition, since the box cover 21 does not have fireproof performance, the box cover 21 may harden and deteriorate unlike the case where the box cover 21 is formed using a putty-like material in order to have fireproof performance. Therefore, it is possible to prevent a decrease in sound insulation due to the deterioration. Further, the wiring box 10 is integrated by bonding the box 11 and the box cover 21. For this reason, the box 11 and the box cover 21 can be simultaneously installed on the lightweight partition wall W only by fixing the wiring box 10 to the lightweight steel P. Therefore, compared with the case where the box 11 and the box cover 21 are separated and each needs to be installed on the lightweight partition wall W, the installation work is facilitated while improving the sound insulation of the installation location. Can do.

  (2) The box cover 21 is formed in a square box shape in advance with a sound insulating material having no fireproof performance. Therefore, it is possible to save the trouble of folding the sheet-like sound insulating material as in Patent Document 2 and forming it into a box shape, and the installation work of the wiring box 10 with improved sound insulation can be facilitated.

  (3) The bottom wall 12 of the box 11 and the bottom portion 22 of the box cover 21 are bonded with an adhesive to form the wiring box 10. That is, the peripheral wall 13 of the box 11 and the peripheral wall 23 of the box cover 21 are not bonded. For this reason, when the insertion hole 15 closed by the knock portion 14 is opened, when the knock portion 14 is removed, the knock portion 14 is not adhered to the peripheral wall 23 of the box cover 21, and the knock portion 14 is It can be easily removed.

  (4) A gap K is formed between the outer peripheral surface of the peripheral wall 13 in the box 11 and the inner peripheral surface of the peripheral wall 23 in the box cover 21. For this reason, even if the peripheral wall 23 of the box cover 21 vibrates due to sound, the peripheral wall 13 of the box 11 is prevented from resonating, and sound insulation can be maintained.

  (5) A slight gap K is formed between the inner peripheral surface of the peripheral wall 23 in the box cover 21 and the outer peripheral surface of the peripheral wall 13 in the box 11. For this reason, in order to cut the peripheral wall 23 of the box cover 21 with a cutting tool or the like, the peripheral wall 23 of the box cover 21 immediately contacts the peripheral wall 13 of the box 11 when the peripheral wall 23 is pushed to the box 11 side. For this reason, the peripheral wall 23 of the box cover 21 is supported by the peripheral wall 13 of the box 11, and the cutting operation | work is performed easily.

  (6) The peripheral wall 13 of the box 11 is formed with an insertion hole 15 that is not closed by the knock portion 14 and is opened in advance. For this reason, even in the wiring box 10 in which the box 11 and the box cover 21 are integrated, when the cable 40 is pulled into the box 11, the cable 11 is simply inserted into the box cover 21 from the insertion hole 15 as it is. The cable 40 can be pulled in, and the insertion operation of the cable 40 can be facilitated.

  (7) The insertion hole 15 is previously formed in the peripheral wall 13 of the box 11. For this reason, when forming a cut for insertion of the cable 40 at a position facing the insertion hole 15 in the peripheral wall 23 of the box cover 21, the cutting tool comes into contact with the inner peripheral surface forming the insertion hole 15 and is more than necessary. It is prevented that a large cut is formed in the film. Therefore, the amount of work for applying the sealing material to fill the notch and the amount of the sealing material used can be suppressed. Moreover, since a notch can be suppressed small, the fall of the sound insulation of the wiring box 10 can also be prevented.

  (8) The box cover 21 is formed of a material having a high specific gravity in olefin and having bubbles, such as a special olefin foam material. For this reason, the box cover 21 can insulate the low frequency sound range with a high specific gravity material, and can insulate the high frequency sound range with bubbles.

  (9) A flange 26 is formed on the box cover 21, and the flange 26 extends from the box cover 21. For this reason, when the flange 26 is pressed by the wall material Wa, the flange 26 tilts toward the side close to the bottom 22 of the box cover 21. The flange 26 is pressed against the back surface of the wall material Wa by a restoring force from the tilted state to the original shape. Therefore, the clearance gap between the back surface of wall material Wa and the box 11 can be reliably interrupted | blocked by the flange 26, and the sound-insulation property of the installation location of the wiring box 10 improves.

  (10) A fixing portion 31 is assembled to the box cover 21, and the wiring box 10 can be fixed to the lightweight steel P using the fixing portion 31. For this reason, when fixing the wiring box 10 to the lightweight steel material P, it is not necessary to let the fixing screw etc. penetrate the box cover 21. Therefore, it is possible to prevent the sound insulation by the box cover 21 from being lowered by passing a fixing screw or the like through the box cover 21.

  (11) In the wiring box 10, the box 11 and the box cover 21 are integrated. For this reason, the box 11 and the box cover 21 are prevented from being separated during transportation and construction of the wiring box 10, and troublesomeness during transportation and construction can be eliminated.

  (12) The wiring box 10 is integrated by bonding the bottom wall 12 of the box 11 and the bottom 22 of the box cover 21. For this reason, in addition to the adhesion between the bottom wall 12 and the bottom portion 22, the amount of the adhesive used is suppressed as compared with the case where the peripheral wall 13 of the box 11 and the peripheral wall 23 of the box cover 21 are adhered, The amount of application work can be reduced, and the manufacturing cost of the wiring box 10 can be reduced.

In addition, you may change this embodiment as follows.
O The size of the box cover 21 may be formed in the accommodating portion 24 so that two boxes 11 described in the embodiment can be accommodated. Then, one or two boxes 11 may be bonded to the box cover 21.

  The wiring box 10 may be formed by folding a sheet material made of a sound insulating material having no fireproof performance and bonding the box 11 to a box cover 21 formed into a bottomed square box shape covering the entire outer surface of the box 11. Good.

○ Integration of the box 11 and the box cover 21 may be performed not by adhesion but by welding, bonding with an adhesive tape, screwing, or the like.
O You may adhere | attach the outer peripheral surface of the surrounding wall 13 in the box 11, and the whole inner peripheral surface in the box cover 21 facing this outer peripheral surface.

○ The fixing unit 31 may be deleted.
○ All the insertion holes 15 may be opened without closing the insertion holes 15 with the knock portion 14. With this configuration, when the cable 40 is pulled into the box 11 through the peripheral wall 23 of the box cover 21, it is only necessary to form a cut in the peripheral wall 23 of the box cover 21. The operation of drawing the cable 40 into the box 11 can be facilitated as compared with the case where it is necessary to do so. Alternatively, all the insertion holes 15 may be closed with the knock portion 14.

In the box cover 21, the flange 26 may be deleted.
In the peripheral wall 23 of the box cover 21, a mark or a notch may be formed in the thickness of the peripheral wall 23 at a position where the cable 40 is inserted. If comprised in this way, the insertion operation | work of the cable 40 can be simplified further.

The fixing part 31 is not limited to the shape of the embodiment as long as it can be fixed to the lightweight steel P, and may be arbitrarily changed.
The gap K may be larger than the gap shown in FIG. 2, and the width of the gap K may be arbitrarily changed.

The gradient formed on the peripheral wall 23 in the box cover 21 may be a gradient other than the draft formed when the box cover 21 is molded.
The wiring box 10 may be installed on the earth wall as the wall of the building. In this case, the fixing unit 31 is fixed to the wooden pillar as the construction material, and the wiring box 10 is installed.

(A) is a perspective view which shows the wiring box of embodiment, (b) is a perspective view which shows a box. The front view which shows the wiring box of embodiment. The side view which shows a wiring box. Sectional drawing which shows the state which fixed the wiring box to the lightweight shape steel material. Sectional drawing which shows the state which pulled in the cable in a box. Sectional drawing which shows the state which installed the wiring box in the lightweight partition wall.

Explanation of symbols

  K: Gap, P: Lightweight steel as construction material, S ... Box opening, W ... Light partition wall as building wall, 10 ... Wiring box, 11 ... Box, 12 ... Bottom wall, 13 ... Perimeter wall, DESCRIPTION OF SYMBOLS 15 ... Insertion hole, 20a ... Opening part, 21 ... Box cover, 22 ... Bottom part, 26 ... Flange, 31 ... Fixing part, 40 ... Cable.

Claims (8)

  A box cover formed in the shape of a bottomed box with an opening on one side by a sound insulating material that does not have fire prevention performance, and is installed on the back of the wall of the building, and is erected on the bottom wall and the periphery of the bottom wall And a box-shaped box having a box opening surrounded by the peripheral wall, and the box cover is integrated with the box so as to cover the entire outer surface of the box while opening the box opening. A wiring box.   The wiring box according to claim 1, wherein the box cover is formed in the shape of the bottomed box.   The wiring box according to claim 1 or 2, wherein an outer surface of the bottom wall of the box is bonded to an inner surface of the bottom portion of the box cover.   The clearance gap is formed between the outer peripheral surface in the surrounding wall of the said box, and the inner peripheral surface of the said box cover over the perimeter of the outer peripheral side of a box. Wiring box as described in.   The wiring box according to any one of claims 1 to 4, wherein an insertion hole through which a cable can be inserted is formed in the peripheral wall of the box.   The said box cover is a wiring box as described in any one of Claims 1-5 currently formed from the material which has high specific gravity and a bubble.   The wiring box according to any one of claims 1 to 6, wherein a flange extending outward from the entire circumference of the opening is formed in the box cover.   The said box cover is a wiring box as described in any one of Claims 1-7 provided with the fixing | fixed part fixed to the construction material installed in the wall back of the said building.

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