JP2013132190A - Fire resistant wiring box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inhibit flame, smoke, toxic gases from flowing into the rear of a wall.SOLUTION: A fire resistant wiring box 1 is composed of: a wiring box 10 made of a synthetic resin; and a metal fire-resistant cover 30 covering an outer surface of an entire peripheral wall of the wiring box 10. Through insertion holes 38, in which fixing screws may be inserted, are formed in the fire-resistant cover 30, and the through insertion holes 38 are covered by a metal sheet material 35, which is formed having a thickness that the fixing screws may break, without forming gaps therebetween. Since the through insertion holes 38 are covered by the sheet material 35, the structure prevents flame, smoke, toxic gases from flowing into the rear of a wall through the through holes 38.

Description

  The present invention relates to a fireproof wiring box.

  In order to install the wiring apparatus on the wall of the building, a wiring box formed in a bottomed square box shape having an opening on the front surface is installed on the back of the wall. By the way, if the wiring box burns due to a fire, there is a risk that flame, smoke, toxic gas, etc. may flow into the back of the wall. Therefore, it is conceivable to form the wiring box with a metal material in order to give the wiring box fire resistance (for example, Patent Document 1).

Japanese Patent Laid-Open No. 11-4515

  Since the wiring box of Patent Document 1 is formed of a metal material, the wiring box itself has fire resistance. However, in Patent Document 1, in order to fix the wiring device mounting cover to the inside of the wiring box, an engaging portion is formed in the side wall of the wiring box. For this reason, no matter how much the wiring box is made of a metal material, there is a risk that flame, smoke, toxic gas, etc. will flow into the back of the wall from the opening.

  The present invention has been made to solve the above-mentioned problems, and its object is to provide a fire-resistant wiring box that can prevent a flame, smoke, toxic gas, etc. from flowing into the back of the wall. There is to do.

  In order to solve the above problems, the invention described in claim 1 is a fireproof wiring box fixed directly to a construction material installed on the back of a wall or via a support, and is made of a synthetic resin wiring. A metal cover that covers an outer surface of the entire peripheral wall of the wiring box, and the cover is inserted with a fixing member for fixing the wiring box to the construction material or the support. A gist is that a hole is formed, and the insertion hole is covered with a sheet material made of metal formed with a thickness that allows the fixing member to be pierced without gaps.

  The invention according to claim 2 is a fire-resistant wiring box that is fixed directly or via a support to a construction material installed on the back of a wall, comprising a metal wiring box, An insertion hole through which a fixing member for fixing the wiring box is inserted into the construction material or the support is formed, and the insertion hole is a sheet material made of metal having a thickness that allows the fixing member to break through. The gist is that it is covered without gaps.

The gist of the invention described in claim 3 is the fire resistant wiring box according to claim 1 or 2, wherein the sheet material is made of a non-flammable metal as defined in the Building Standard Law.
Invention of Claim 4 is a fireproof wiring box as described in any one of Claims 1-3. WHEREIN: The said sheet | seat material laminates | stacks the metal layer and the adhesion layer which consists of a viscous material. The gist is that it is formed.

The gist of the invention described in claim 5 is the fireproof wiring box according to any one of claims 1 to 4, wherein the insertion hole is in the shape of a long hole.
The invention according to claim 6 is the fireproof wiring box according to any one of claims 1 to 5, wherein the fireproof wiring box is formed with a cable insertion hole for inserting a cable, The cable insertion hole is covered with the sheet material without any gap.

  According to the present invention, it is possible to prevent a flame, smoke, toxic gas or the like from flowing into the back of the wall.

The perspective view which shows a wiring box and a fireproof cover. The top view which shows the state in which the wiring box was accommodated in the fireproof cover. The side view which shows a wiring box. Sectional drawing which shows the state which inserted the driver in space. Sectional drawing which shows the state which has removed the knock part with the driver. Sectional drawing which shows the state which arrange | positioned the fireproof bushing in the cable penetration hole. The perspective view which shows the state which fixed the fireproof wiring box to the pillar. (A) is sectional drawing which shows the state which installed the fireproof wiring box in the wall back, (b) is a partial side view which shows the state which installed the fireproof wiring box in the wall back. The perspective view which shows the state which fixed the fireproof wiring box in another embodiment to the pillar. Sectional drawing which shows the state which stuck the sheet | seat material in the cable penetration hole in another embodiment.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the fireproof wiring box 1 includes a wiring box 10 installed on the back of the wall W and a fireproof cover 30 as a cover covering the wiring box 10.

First, the wall W where the fireproof wiring box 1 is installed will be described.
As shown in FIG. 8A, the wall W includes a pillar H as a construction material and a pair of wall materials W1 erected on both front and rear surfaces of the pillar H (in FIG. 8A, one wall material W1). Only shown). The wall material W1 is made of gypsum board. In addition, a hollow portion W2 is formed between the pair of wall materials W1, and a heat insulating member (not shown) such as a foamed polystyrene plate, glass wool, or a hard foamed urethane plate is provided in the hollow portion W2.

Next, the wiring box 10 will be described.
As shown in FIG. 1, the wiring box 10 has an opening 13 on the front surface (one surface) from a rectangular plate-shaped bottom wall 11 and four side walls 12 a to 12 d erected from the periphery of the bottom wall 11. It is formed in a bottom square box shape. The peripheral wall of the wiring box 10 is formed by the bottom wall 11 and the side walls 12a to 12d. In the following description, the upper and lower side walls in FIG. 1 are referred to as an upper side wall 12a and a lower side wall 12b, and the left and right side walls in FIG. 1 are referred to as a right side wall 12c and a left side wall 12d. The wiring box 10 is made of synthetic resin.

  Two cable insertion holes 14 are formed in the upper side wall 12a and the lower side wall 12b. Boss portions 15 projecting inward are provided on the inner surfaces of the upper side wall 12a and the lower side wall 12b. Each boss portion 15 is used for attaching a wiring device (not shown) to the wiring box 10. A magnet holding portion 20 is erected at the center portion of the bottom wall 11 in the long side direction (vertical direction) and the short side direction (left and right direction), and a magnet is provided at the front end portion (tip portion) of the magnet holding portion 20. 17 is held.

  In the bottom wall 11, a plurality (three in this embodiment) of screw holding portions 18 projecting toward the opening 13 are provided on the upper side wall 12 a side and the right side wall 12 c side at a predetermined interval. ing. The shaft 19a of the wiring fixture mounting screw 19 made of a metal material is forcibly inserted between the adjacent screw holding portions 18 so that the wiring fixture mounting screws 19 are interposed between the screw holding portions 18. It is supposed to be held at. A plurality (three in the embodiment) of insertion holes 16 through which fixing screws B (see FIG. 7) as fixing members are inserted are formed in the left side wall 12d. Each insertion hole 16 is formed in a long hole shape that extends in the depth direction of the wiring box 10. The fixing screw B is used for fixing the wiring box 10 to the pillar H.

  A fitting recess 21 that is recessed toward the opening 13 is formed on the outer surface of the bottom wall 11. The fitting recess 21 is formed at the center of the outer surface of the bottom wall 11 so as to extend along the left-right direction between the right side wall 12c and the left side wall 12d.

Next, the fireproof cover 30 will be described.
The fireproof cover 30 includes a cover main body 31 formed in a bottomed square box shape having an opening 31a on the front surface (one surface). The cover body 31 is made of a metal material. The cover main body 31 is formed of a rectangular plate-shaped bottom wall 32 and four side walls 32 a to 32 d erected from the periphery of the bottom wall 32. A peripheral wall of the cover body 31 is formed by the bottom wall 32 and the side walls 32a to 32d. Further, the cover main body 31 has an accommodation space 33 which is enclosed by the bottom wall 32 and the side walls 32a to 32d and can accommodate the wiring box 10. In the following description, the upper and lower side walls in FIG. 1 are referred to as an upper side wall 32a and a lower side wall 32b, and the left and right side walls in FIG. 1 are referred to as a right side wall 32c and a left side wall 32d.

  As shown in FIG. 2, the right side wall 32 c is provided with two positioning pieces 36 that protrude from the inner surface toward the cover body 31. Similarly, the left side wall 32d is provided with two positioning pieces 37 protruding from the inner surface toward the cover body 31. The positioning pieces 36 and 37 are provided at positions facing each other on the inner surfaces of the right side wall 32c and the left side wall 32d, and are linearly formed along the direction perpendicular to the bottom wall 32 between the opening 31a and the bottom wall 32. It extends. The front end surfaces 36a and 37a (surfaces of the positioning pieces 36 and 37 facing each other) on the protruding direction side of the positioning pieces 36 and 37 are flat surfaces.

  As shown in FIG. 1, a positioning protrusion 40 that protrudes toward the opening 31 a is formed on the inner surface of the bottom wall 32. The positioning protrusion 40 is formed at the center of the inner surface of the bottom wall 32 so as to extend along the left-right direction between the right side wall 32c and the left side wall 32d. The positioning protrusion 40 can be fitted into the fitting recess 21.

  A square ring-shaped flange 41 is integrally formed on the entire periphery of the opening 31 a of the cover body 31. The flange 41 is formed so as to extend from the entire periphery of the opening 31 a toward the outside of the cover body 31. As shown in FIG. 8A, the thickness M1 of the flange 41 is a thickness (for example, about 0.5 mm to 1.0 mm) that does not affect when the wall material W1 is installed on the front surface of the column H. Here, the “thickness that does not affect when the wall material W1 is installed on the front surface of the column H” means that the thickness of the flange 41 is such that the rear surface of the flange 41 is in contact with the front surface of the column H. Even if the wall material W1 is installed on the front surface, the thickness is such that a large gap is not formed between the front surface of the column H and the rear surface of the wall material W1.

  The left side wall 32d is a contact portion that can contact the side surface of the column H when the fireproof cover 30 is installed on the column H. Furthermore, a plurality (three in this embodiment) of insertion holes 38 are formed in the left side wall 32d as insertion holes through which the fixing screws B are inserted. Each insertion hole 38 is formed in a long hole shape that extends in the depth direction of the cover body 31.

  As shown in FIG. 1, two cable insertion holes 34 as cable insertion holes can be formed in the upper side wall 32a and the lower side wall 32b. The cable insertion hole 34 is opened for the first time when the cable C (see FIG. 7) is inserted, and is closed by a knock portion 34a when the cable C is not inserted. The cable insertion hole 34 is opened with a dimension that allows a clearance to be formed between the cable C and the cable insertion hole 34 so that the cable insertion hole 34 does not easily interfere with the cable C.

Further, as shown in FIG. 1, a sheet material 35 is attached to the inner surface 321 d of the left side wall 32 d of the cover body 31 so as to cover the through hole 38.
Hereinafter, the sheet material 35 will be described with reference to FIG. 1 or FIG.

  The sheet material 35 is formed by laminating a metal layer 35a and an adhesive layer 35b. The metal layer 35a is made of aluminum, which is a non-combustible material that meets the technical standards defined in Article 108 of Article 108 of the Building Standards Law Enforcement Ordinance. The adhesive layer 35b is formed by applying a paste as a viscous material to the metal layer 35a. Incidentally, the fireproof cover 30 is formed of a metal having a higher strength than the sheet material 35.

  The sheet material 35 has a rectangular shape and is formed in a size that allows all the through holes 38 formed in the left side wall 32d to be covered with one sheet material 35. More specifically, the long side of the sheet material 35 is substantially the same length as the installation interval of the two positioning pieces 37, while the short side of the sheet material 35 is substantially the same length as the long side of the positioning piece 37. ing. The sheet material 35 has a thickness that allows the fixing screw B to pierce the sheet material 35 when the fixing screw B is screwed into the pillar H from the inside of the fireproof cover 30.

The sheet material 35 is sandwiched between the positioning pieces 37, and is attached to the inner surface 321d of the left side wall 32d so that one long side is along the opening edge of the cover body 31.
The through hole 38 is covered from the inner surface of the fireproof cover 30 by the sheet material 35, and the through hole 38 is covered by the sheet material 35 without a gap.

Next, a method for housing the wiring box 10 in the fireproof cover 30 will be described.
As shown in FIG. 2, the wiring box 10 is inserted so as to be forced into the housing space 33. Then, the wiring box 10 is sandwiched between the front end surfaces 36a and 37a of the positioning pieces 36 and 37, and the movement of the wiring box 10 in the left-right direction in the accommodation space 33 is restricted. Furthermore, when the positioning protrusion 40 and the fitting recess 21 are fitted, movement in the vertical direction in the accommodation space 33 in the wiring box 10 is restricted. As a result, the wiring box 10 is positioned in the accommodation space 33.

  In a state where the wiring box 10 is positioned in the accommodation space 33, the through holes 38 and the insertion holes 16 face each other, and the upper wall 12 a of the wiring box 10 and the cover main body 31 are located in the accommodation space 33. A space K1 is formed between the upper side wall 32a and a space K2 is formed between the lower side wall 12b of the wiring box 10 and the lower side wall 32b of the cover body 31.

  The depth of the accommodation space 33 is such that the opening 13 of the wiring box 10 is the same as the opening 31 a of the cover body 31 when the wiring box 10 is accommodated in the accommodation space 33 and the wiring box 10 is positioned in the accommodation space 33. It is set to lie on a plane. Therefore, the accommodation space 33 is formed in a size that allows the wiring box 10 to be accommodated in the accommodation space 33 from the opening 31 a and covers the entire outer surface of the wiring box 10 accommodated in the accommodation space 33. That is, the outer surface of all the peripheral walls (the bottom wall 11 and the side walls 12a to 12d) constituting the wiring box 10 is covered by the fireproof cover 30.

  In this way, the wiring box 10 is accommodated in the fireproof cover 30 in which the sheet material 35 is adhered to the inner surface 321d of the left side wall 32d of the fireproof cover 30 so as to cover the insertion hole 38, and thus the fireproof cover 30 and A fireproof wiring box 1 including the wiring box 10 is configured.

Next, the installation method with respect to the wall W of the fireproof wiring box 1 is demonstrated.
First, as shown in FIG. 4, the driver D is inserted into the space K1, and as shown in FIG. 5, the base end side of the driver D is rotated toward the lower side wall 32b, so that the tip end portion of the driver D is moved. The knock portion 34a is removed by pressing against the knock portion 34a, and one cable penetration hole 34 is opened in the upper side wall 32a. The space K1 is a space necessary for removing the knock portion 34a.

  Subsequently, as shown in FIG. 6, a fireproof bushing 39 is disposed in the cable penetration hole 34. The fireproof bushing 39 is formed in a covered cylindrical shape by heat-expandable heat-resistant rubber. The fireproof bushing 39 is attached to the cable penetration hole 34 by hooking the edge of the cable penetration hole 34 to the mounting groove 39a formed over the entire outer peripheral surface. The fireproof bushing 39 prevents interference between the cable C and the cable insertion hole 34. That is, the space K1 is a space necessary for fixing the fireproof bushing 39 to the cable insertion hole 34.

  Next, as shown in FIG. 7, the outer surface 322 d of the left side wall 32 d of the cover main body 31 is brought into contact with the side surface of the column H, and the fireproof wiring box is arranged so that the left rear surface of the flange 41 comes into contact with the front surface of the column H. 1 is placed. Subsequently, the fixing screw B is inserted into the insertion hole 16 of the wiring box 10 and the insertion hole 38 of the cover body 31. Then, after the fixing screw B passes through the insertion hole 16, the fixing screw B breaks through the sheet material 35 and penetrates the insertion hole 38. When the fixing screw B is forcibly screwed into the pillar H, the fireproof wiring box 1 is directly fixed to the pillar H. At this time, the sheet material 35 is pierced by the shaft portion B1 (FIG. 8B) of the fixed screw B, but as shown in FIG. 8B, the sheet generated by the penetration of the fixed screw B The through hole 35c of the material 35 is closed from the inside of the fireproof cover 30 by the head B2 of the fixing screw B. In addition, the fireproof wiring box 1 may be attached to the pillar H through a box fixture (not shown) fixed to the pillar H, another support tool, or the like.

  Subsequently, the cable C is inserted into the cover main body 31 through the fireproof bushing 39, and the cable C inserted into the cover main body 31 is further drawn into the wiring box 10 through the cable insertion hole 14. Here, as shown in FIG. 7, the periphery of the insertion hole 39 b of the fireproof bushing 39 is formed thin, and the diameter of the insertion hole 39 b is smaller than the outer diameter of the cable C. Therefore, when the cable C passes through the insertion hole 39b, the periphery of the insertion hole 39b in the fireproof bushing 39 is deformed and is in close contact with the cable C.

  Subsequently, as shown in FIG. 8A, a wall material W <b> 1 is erected on the front side of the column H. Then, the refractory wiring box 1 is installed on the back side of the wall W with the left side of the flange 41 sandwiched between the rear surface of the wall material W1 and the front surface of the column H. Thus, the installation structure of the fireproof wiring box 1 is formed. At this time, the entire front surface of the flange 41 is in surface contact with the rear surface of the wall material W1. Then, the position of the magnet 17 is detected from the surface of the wall W using a magnet detector (not shown), the position of the wiring box 10 is detected, and a through hole Wa is formed in the wall material W1 using an electric drilling tool (not shown). To do. Then, the opening 13 of the wiring box 10 is exposed to the surface of the wall W through the through hole Wa.

  Subsequently, the magnet holding portion 20 is cut and removed from the base end side, and the wiring device mounting screws 19 held between the screw holding portions 18 are taken out through the through holes Wa, and these wiring device mounting screws are removed. 19 is used to attach a wiring device holding frame (both not shown) holding the wiring device to the wiring box 10. A decorative plate (not shown) is attached to the opening 13 side of the wiring box 10.

Next, the operation of the fireproof wiring box 1 of the present embodiment will be described.
When a fire or the like occurs, the synthetic resin wiring box 10 does not have fire resistance, and thus is easily burned by a fire. However, since the metal fireproof cover 30 has fire resistance, it is difficult to burn, and even if the wiring box 10 burns due to a fire, the fireproof cover 30 can cause flames, smoke, toxic gas, etc. on the back of the wall W. Inflow is prevented. Furthermore, since the through hole 38 of the fireproof cover 30 is covered with the metal sheet material 35 from the inside of the fireproof cover 30, flames, smoke, toxic gases, etc. that have flowed into the fireproof cover 30 are inserted into the through hole. Inflow to the back of the wall W via 38 is suppressed.

  Further, the sheet material 35 is torn by the penetration of the shaft portion B1 of the fixed screw B. As shown in FIG. 8B, the through hole 35c of the sheet material 35 generated by the penetration of the fixed screw B is The fireproof cover 30 is closed from the inside by the head B2 of the fixing screw B. Thereby, it is suppressed that the flame, smoke, toxic gas, etc. which flowed into the fireproof cover 30 flow into the back of the wall W through the through hole 38.

In the above embodiment, the following effects can be obtained.
(1) The fireproof wiring box 1 is composed of a synthetic resin wiring box 10 and a metal fireproof cover 30 that covers the outer surface of the entire peripheral wall of the wiring box 10. And the penetration hole 38 of the fireproof cover 30 was covered with a sheet material 35 made of metal formed with such a thickness that the fixing screw B can break through without any gap. According to this, since the through hole 38 is covered with the sheet material 35, it is possible to prevent flame, smoke, toxic gas and the like from flowing into the back of the wall W through the through hole 38. .

  (2) The sheet material 35 consists of aluminum which is a nonflammable material which has the nonflammability of a building standard law. Therefore, the fire resistance of the sheet material 35 can be ensured as compared with the case where the sheet material 35 is formed of a semi-incombustible material or a flame retardant material.

  (3) The sheet material 35 was formed by laminating the metal layer 35a and the adhesive layer 35b. According to this, the sheet material 35 can be easily adhered to the inner surface 321d of the left side wall 32d, and the fixing screw B can easily penetrate the sheet material 35 by using a thin metal layer. It becomes.

  (4) By making the through hole 38 into a long hole shape, the fireproof wiring box 1 is slid along the long side direction of the long hole even after the fixing screw B is inserted into the through hole 38. It becomes possible. Thereby, it becomes possible to adjust the arrangement position of the fireproof wiring box 1 even after the fixing screw is inserted.

  (5) The sheet material 35 is formed in such a size that all the through-holes 38 formed in the left side wall 32d can be covered with one sheet material 35. Accordingly, since all the through holes 38 can be covered at a time only by sticking the sheet material 35 to the inner surface 321d of the left side wall 32d, the labor related to the work for preventing the through holes 38 is simplified. be able to. Further, by sticking the sheet material 35 to the inner surface 321d of the left side wall 32d, the sticking direction of the sheet material 35 and the screwing direction of the fixing screw B become the same, so that when the fixing screw B is screwed in, the sheet The material 35 becomes difficult to peel off.

  (6) Each penetration hole 38 is provided at a position corresponding to each insertion hole 16 in a state where the wiring box 10 is accommodated in the accommodation space 33. Therefore, when fixing the refractory wiring box 1 to the pillar H, the fixing screw B that has passed through the insertion hole 16 of the wiring box 10 can be inserted into the through-hole 38 through the sheet material 35, and the pillar as it is. H can be forcibly screwed. That is, the through hole 38 is not provided at a position corresponding to the insertion hole 16, and the fixing screw B that has passed through the insertion hole 16 can be prevented from being blocked by the cover body 31.

  (7) Further, by sticking the sheet material 35 to the inner surface 321d of the left side wall 32d, it becomes impossible to visually recognize the through hole 38 from the inside of the fireproof cover 30; The sheet material 35 is not attached. Since each insertion hole 38 is provided at a position corresponding to each insertion hole 16, the fixing screw B is inserted into the insertion hole 16 as long as the wiring box 10 is fitted in the fireproof cover 30. Thus, the sheet material 35 can be forced through and screwed into the column H through the insertion hole 38. For this reason, even if it is a case where the sheet | seat material 35 is affixed on the fireproof cover 30, screwing of the fixed screw B is not blocked | interrupted.

  (8) The fireproof wiring box 1 is formed by the wiring box 10 made of synthetic resin and the metal fireproof cover 30 having the housing space 33 for housing the wiring box 10. For example, if the wiring box itself is made of metal, the wiring box itself can have fire resistance, but if the wiring box itself is made of a metal material, the magnet holding portion provided in the wiring box 10 of the present embodiment. In the case of forming the screw 20 and the screw holding portion 18, it takes time and effort to process the metal, and the cost increases. However, according to the present embodiment, the wiring box 10 is formed of a synthetic resin material, and the fireproof cover 30 that accommodates the wiring box 10 is formed of metal. For this reason, while adopting the wiring box 10 made of synthetic resin, it is possible to ensure fire resistance by the fireproof cover 30 and to prevent inflow of flame, smoke, toxic gas, etc. into the back of the wall W. Can do.

  (9) If the flange 41 is too thick, a large gap is formed between the front surface of the column H and the rear surface of the wall material W1, which is not preferable. However, in the present embodiment, the thickness of the flange 41 is a thickness that does not affect when the wall material W1 is installed on the front surface of the column H. Therefore, the clearance gap formed between the front surface of the pillar H and the rear surface of wall material W1 can be suppressed.

  (10) The flange 41 is formed all around the peripheral edge of the opening 31a. Therefore, the entire front surface of the flange 41 can be brought into surface contact with the rear surface of the wall material W1, and flame, smoke, toxic gas, etc. in the fireproof cover 30 can be made difficult to flow into the back of the wall W.

  (11) In the accommodation space 33, a space K1 is formed between the upper wall 12a of the wiring box 10 and the upper wall 32a of the cover body 31. And the cable penetration hole 34 can be formed in the upper side wall 32a by inserting the driver D in this space K1, and removing the knock part 34a by the front-end | tip part of the driver D. FIG. Furthermore, the fireproof bushing 39 disposed in the cable penetration hole 34 can be projected into the space K1. As a result, the fireproof bushing 39 can be fixed to the cable insertion hole 34 and the fixing operation can be easily performed.

  (12) Positioning pieces 36 and 37 projecting into the cover body 31 are provided on the inner surfaces of the right side wall 32c and the left side wall 32d of the cover body 31, and positioning is performed on the inner surface of the bottom wall 32 so as to project toward the opening 31a. Protrusion 40 was provided. And the movement to the left-right direction in the accommodation space 33 in the wiring box 10 can be controlled by pinching the wiring box 10 by the front end surfaces 36a, 37a of the positioning pieces 36, 37. Furthermore, when the positioning protrusion 40 and the fitting recess 21 are fitted, the movement in the vertical direction in the accommodation space 33 in the wiring box 10 can be restricted. As a result, the wiring box 10 can be positioned at a position where the through holes 38 and the through holes 16 face each other and the spaces K1 and K2 are formed.

  (13) By arranging the refractory wiring box 1 so that the left rear surface of the flange 41 contacts the front surface of the column H, the opening 13 of the wiring box 10 can be brought close to the rear surface of the wall material W1. Therefore, the boss portion 15 can be as close as possible to the rear surface of the wall material W1. As a result, the wiring device holding frame can be easily attached to the wiring box 10, and workability is improved.

  (14) For example, if the wiring box itself is made of metal, it is necessary to ground the wiring box in order to ensure electrical insulation. However, since the wiring box 10 made of a synthetic resin material has electrical insulation, it is not necessary to ground the wiring box 10 and the configuration can be simplified.

(Second Embodiment)
Next, a second embodiment in which the present invention is embodied in a fireproof wiring box will be described with reference to FIG. In the embodiment described below, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the redundant description thereof is omitted or simplified.

  As shown in FIG. 9, in the present embodiment, since the metal wiring box 50 is used, the wiring box 50 itself has fire resistance, so the fireproof cover 30 is not required. Therefore, in this embodiment, the fireproof wiring box 2 is formed by the wiring box 50. Further, the wiring box 50 is fixed to a lightweight steel material P as a column via a box fixture F to which the wiring box 50 is attached. A plurality (two in the embodiment) of insertion holes 51 into which the fixing screws B are screwed are formed in the bottom wall 11 of the wiring box 50. And the metal sheet | seat material 35 is affixed on the inner surface 11a of the bottom wall 11 in which the insertion hole 51 is formed so that all the insertion holes 51 may be covered.

  Next, the installation method with respect to the wall W of the fireproof wiring box 2 is demonstrated. Although the fireproof bushing 39 is disposed in the cable insertion hole 34 of the fireproof cover 30 in the first embodiment, the fireproof bushing 39 is disposed directly in the cable insertion hole 14 in the second embodiment. The point is different from the first embodiment. Moreover, the point by which the cable penetration hole 14 is closed by the knock part 14a differs from 1st Embodiment.

  First, as shown in FIG. 9, the box fixture F is brought into contact with the side surface of the lightweight steel member P. Then, the fixing screw B is forcibly screwed into the light-weight shaped steel material P from the box fixing tool F side to attach the box fixing tool F to the light-weight shaped steel material P. Next, the wiring box 50 is disposed in contact with the box fixture F. Subsequently, the fixing screw B is inserted into the insertion hole 51 of the wiring box 50. Then, the fixing screw B passes through the insertion hole 51 and then breaks through the sheet material 35. When the fixing screw B is forcibly screwed into the box fixture F, the fireproof wiring box 2 is fixed to the box fixture F. At this time, the sheet material 35 is torn by the penetration of the shaft portion B1 of the fixed screw B, but the through hole 35c of the sheet material 35 generated by the penetration of the fixed screw B is wired by the head B2 of the fixed screw B. The box 50 is closed from the inside.

  Subsequently, the cable C is inserted into the cable insertion hole 14 through the fireproof bushing 39 and further drawn into the wiring box 50. Subsequently, the wall material W1 is erected on the front side of the light-weight shaped steel material P. Then, the fireproof wiring box 2 is installed behind the wall W. Thus, the installation structure of the fireproof wiring box 2 is formed.

Next, the effect | action of the fireproof wiring box 2 of this embodiment is demonstrated.
By using the metal wiring box 50, the wiring box 50 itself is difficult to disappear due to a fire. Further, since the insertion hole 51 of the wiring box 50 is covered with the metal sheet material 35 from the inside of the wiring box 50, flames, smoke, toxic gas, etc. flowing into the wiring box 50 are inserted into the insertion hole 51. It is suppressed that it flows into the wall W back via.

  Further, the sheet material 35 is torn by the penetration of the shaft portion B1 of the fixed screw B, but the through hole 35c of the sheet material 35 generated by the penetration of the fixed screw B is caused by the head B2 of the fixed screw B to the wiring box 50. It is blocked from the inside. Thereby, it is suppressed that the flame, smoke, toxic gas, etc. which flowed into the wiring box 50 flow into the back of the wall W through the insertion hole 51.

In the said embodiment, in addition to the effect similar to the effect of (2)-(5) as described in 1st Embodiment, the following effects can be acquired.
(15) The fireproof wiring box 2 was formed with the metal wiring box 50 itself. Then, the insertion hole 51 of the metal wiring box 50 was covered with a sheet material 35 made of metal formed with such a thickness that the fixing screw B can break through without any gap. According to this, since the insertion hole 51 is covered with the sheet material 35, it is possible to prevent flame, smoke, toxic gas and the like from flowing into the back of the wall W through the insertion hole 51.

In addition, you may change each said embodiment as follows.
In the second embodiment, the wiring box 50 may be directly attached to the pillar. In this case, an insertion hole through which the fixing screw B is inserted is formed in the left side wall 12d of the wiring box 50, and the sheet material 35 may be attached from the inner surface of the left side wall 12d so as to cover the insertion hole.

  In 1st Embodiment, as shown in FIG. 10, the sheet | seat material 35 is stuck on the outer surface 321a of the upper side wall 32a in which the cable penetration hole 34 is formed so that the cable penetration hole 34 may be coat | covered. May be. In addition, when covering the cable penetration hole 34 with the sheet | seat material 35, the knock part 34a is not formed in the upper side wall 32a, but the sheet | seat material 35 is directly affixed on the outer surface 321a of the upper side wall 32a. When the cable C is inserted into the cable insertion hole 34, the cable C breaks through the sheet material 35 and penetrates the cable insertion hole 34, and is arranged in the wiring box 10. At this time, the sheet material 35 is pierced by the cable C, but a portion where the cable C does not penetrate in the cable insertion hole 34 is blocked by the sheet material 35. Similarly, in 2nd Embodiment, the sheet | seat material 35 will be affixed on the outer surface of the upper side wall 12a in which the cable penetration hole 14 is formed so that the cable penetration hole 14 may be coat | covered. According to this, in addition to the insertion holes (the insertion holes 38 and the insertion holes 16 and 51) of the fixing screw B, the cable insertion holes (the cable insertion holes 34 and the cable insertion holes 14) are also covered with the sheet material 35 without gaps. It will be. Therefore, flame, smoke, toxic gas, etc. can be prevented from flowing into the back of the wall W from the cable insertion holes (cable insertion holes 34 and cable insertion holes 14) through which the cable C is inserted, Inflow of flame, smoke, toxic gas, etc. can be prevented more reliably. Further, by sticking the sheet material 35 on the outer surface, the sticking direction of the sheet material 35 and the insertion direction of the cable C become the same, so that the sheet material 35 is difficult to peel off when the cable C is inserted.

  In the first embodiment, the sheet material 35 may have a length that can cover the front end surfaces 36a and 37a on the protruding direction side of the positioning pieces 36 and 37. According to this, it is possible to prevent the inflow of flame, smoke, toxic gas, etc. from the space generated by the step between the positioning pieces 36, 37 and the left side wall 32d.

  In the first embodiment, all the through holes 38 are covered with one sheet material 35. However, a plurality of sheet materials 35 are formed on the left side wall 32d so as to cover each through hole 38 individually. You may affix on the inner surface 321d. Similarly, in the second embodiment, a plurality of sheet members 35 may be attached to the inner surface 122d (FIG. 2) of the left side wall 12d so as to cover each insertion hole 16.

  ○ In each embodiment, the sheet material 35 in which the metal layer 35a and the adhesive layer 35b are laminated is used. However, if the sheet material 35 can be attached to the inner surface 321d of the left side wall 32d or the inner surface 122d of the left side wall 12d, The metal layer 35a may be attached to the inner surface 321d of the left side wall 32d or the inner surface 122d of the left side wall 12d by any method. For example, an adhesive may be applied to the back surface of the metal layer 35a, and the metal layer 35a may be adhered to the inner surface 321d of the left side wall 32d or the inner surface 122d of the left side wall 12d. Alternatively, it may be attached to the inner surface 321d of the left side wall 32d or the inner surface 122d of the left side wall 12d with a tape having an adhesive layer from the surface of the metal layer 35a. Further, the metal layer 35a may be welded to the inner surface 321d of the left side wall 32d or the inner surface 122d of the left side wall 12d.

  In each embodiment, the metal layer 35a is not limited to aluminum as long as it is a metal material. However, it is desirable that the metal layer be formed with a thickness that allows the fixing screw B to be broken through.

  In each embodiment, the insertion hole (through hole 38 or insertion hole 16) does not have to be a long hole, and any shape can be used as long as the shaft B1 of the fixing screw B can be inserted. It may be.

  In each embodiment, the sheet material 35 may be attached from the outer surface 322d of the left side wall 32d or the outer surface 121d of the left side wall 12d. Moreover, you may stick from the inner surface of the upper side wall 32a, or the inner surface of the upper side wall 12a.

  In each embodiment, if the fixing screw B is a strong metal that can be inserted, the sheet material 35 having a thickness equal to or greater than the thickness of the insertion hole (the insertion hole 38 or the insertion holes 16 and 51) The through hole 38 or the through holes 16, 51) may be covered.

  In the first embodiment, the refractory wiring box 1 may be arranged so that the left rear surface and the right rear surface of the flange 41 are in contact with the front surfaces of both pillars H. According to this, since the left and right sides of the flange 41 are sandwiched between the rear surface of the wall material W1 and the front surfaces of both columns H when the wall material W1 is erected on the front surfaces of both columns H, the fireproof wiring box 1 It becomes difficult to incline with respect to the rear surface of the wall material W1, and the opening of the fireproof wiring box 1 can be easily maintained in a state parallel to the rear surface of the wall material W1. Furthermore, the entire front surface of the flange 41 can be easily brought into surface contact with the rear surface of the wall material W1, and flames, smoke, toxic gas, etc. in the fireproof cover 30 can hardly flow into the back of the wall W. it can.

In the first embodiment, the positioning pieces 36 and 37 may be deleted.
In the first embodiment, the positioning protrusion 40 may be deleted.
In the first embodiment, for example, the outer surface 121d of the left side wall 12d of the wiring box 10 is provided with a locking projection that locks to the peripheral portion of the through hole 38, and the locking protrusion is formed to the peripheral portion of the through hole 38. The wiring box 10 may be positioned in the accommodation space 33 by locking the.

  In the first embodiment, the depth of the accommodation space 33 is such that when the wiring box 10 is accommodated in the accommodation space 33 and the wiring box 10 is positioned in the accommodation space 33, the opening 13 of the wiring box 10 is the cover body. Although it was set so that it may be located on the same plane as the opening 31a of 31, it is not restricted to this. The depth of the accommodation space 33 may be set so that the opening 13 of the wiring box 10 does not protrude from the opening 31 a of the cover body 31 in a state where the wiring box 10 is accommodated in the accommodation space 33.

  In the first embodiment, a fire-resistant putty may be filled between the cable C and the cable insertion hole 34. In this case, the space K <b> 1 is a space necessary for filling a fire-resistant putty between the cable C and the cable insertion hole 34.

  In the first embodiment, a pipe that accommodates the cable C may be attached to the cable insertion hole 34. When the pipe is attached to the cable penetration hole 34, a connector provided in the pipe is connected to the cable penetration hole 34 using a nut. In this case, the space K <b> 1 is a space necessary for connecting the pipe to the cable insertion hole 34.

In the first embodiment, the space K1 and the space K2 may be deleted.
In the first embodiment, each through hole 38 may not be provided at a position corresponding to each insertion hole 16 in a state where the wiring box 10 is accommodated in the accommodation space 33.

  In the first embodiment, an insertion hole that penetrates in the thickness direction is formed in the flange 41, and a fixing screw is inserted into the insertion hole in a state where the flange 41 is in contact with the front surface of the column H. The fireproof wiring box 1 may be fixed to the column H by forcibly screwing the fixing screw into the column H.

  In the first embodiment, the flange 41 is formed on the entire periphery of the peripheral edge of the opening 31a. However, the present invention is not limited thereto, and a portion of the flange 41 that does not contact the front surface of the column H may be deleted. That is, only the part where the flange contacts the front surface of the column H may be provided.

In the first embodiment, the thickness of the flange 41 is not particularly limited.
In the first embodiment, the flange 41 may be deleted.
Next, a technical idea that can be grasped from the above embodiment and another example will be added below.

  (A) A fireproof wiring box fixed directly or via a support to a construction material installed on the back of the wall, wherein the peripheral wall in contact with the construction material or the support in the fireproof wiring box is a metal material And an insertion hole through which a fixing member for fixing the fireproof wiring box to the construction material or the support is inserted, and the insertion wall is formed in the peripheral wall formed of the metal material. The hole is a refractory wiring box that is covered with a sheet material made of metal that can be pierced by the fixing member.

(B) The fireproof wiring box according to claim 1, wherein the cover is made of a metal having a high strength while the sheet material is made of a metal having a strength lower than that of the metal constituting the cover.
(C) The fireproof wiring box according to claim 2, wherein the wiring box is made of a metal having a high strength while the sheet material is made of a metal having a strength lower than that of the metal constituting the wiring box.

  B: Fixing screw as a fixing member, C ... Cable, H ... Column as construction material, W ... Wall, W1 ... Wall material, 1,2 ... Fireproof wiring box, 10,50 ... Wiring box, 12d ... As side wall Left side wall, 122d ... inner surface of left side wall, 14 ... cable insertion hole, 16 ... insertion hole, 30 ... fireproof cover as cover, 31 ... cover main body, 32 ... left side wall as side wall, 321d ... inner surface of left side wall, 34 ... Cable penetration hole as cable insertion hole, 35 ... Sheet material, 35a ... Metal layer, 35b ... Adhesive layer, 38 ... Through hole as insertion hole, 51 ... Insertion hole.

Claims (6)

A fireproof wiring box that is fixed directly or via a support to a construction material installed on the back of the wall,
A wiring box made of synthetic resin, and a metal cover covering the outer surface of the entire peripheral wall of the wiring box,
The cover is formed with an insertion hole through which a fixing member for fixing the wiring box to the construction material or the support is inserted, and the insertion hole is formed with a thickness that allows the fixing member to break through. A fireproof wiring box that is covered with metal sheet material without gaps. A fireproof wiring box that is fixed directly or via a support to a construction material installed on the back of the wall,
With a metal wiring box,
The wiring box is formed with an insertion hole through which a fixing member for fixing the wiring box to the construction material or the support is inserted, and the insertion hole is formed with a thickness that the fixing member can break through. A fireproof wiring box that is covered with a sheet of metal material without gaps.   The fireproof wiring box according to claim 1, wherein the sheet material is made of a metal having nonflammability as defined in the Building Standard Law.   The fireproof wiring box according to any one of claims 1 to 3, wherein the sheet material is formed by laminating a metal layer and an adhesive layer made of a viscous material.   The fire-resistant wiring box according to any one of claims 1 to 4, wherein the insertion hole has a long hole shape.   A cable insertion hole for inserting a cable is formed in the fireproof wiring box, and the cable insertion hole is covered with the sheet material without any gap. Fireproof wiring box.