JP7555873B2 - Wiring device mounting parts - Google Patents

Description

The present invention relates to a wiring device mounting member that is fixed to a structure such as a pillar or furring strip behind the wall of a building and to which a wiring device that is installed on the surface of the wall can be attached.

Wiring device mounting members are used when installing wiring devices such as lighting device switches and electrical outlets into which plugs for electrical appliances are inserted on the surface of a building's partition wall or other wall. A wiring device mounting member is usually formed in a square box shape with one side open, with a bottom wall and a peripheral wall erected from the bottom wall, and is fixed to a pillar or the like behind the wall. The wiring device is installed by sandwiching the periphery of a through hole provided in the wall between the wiring device mounting member installed on the back side of the wall and the wiring device mounting frame that holds the wiring device attached to the front side of the wall. Wiring device mounting members of this type are disclosed in Patent Documents 1 to 3, etc.

The wiring device mounting member described in Patent Document 1 is installed behind a wall by inserting fixing screws into fixing holes formed in the left and right walls of a peripheral wall consisting of an upper wall, a lower wall, a left wall, and a right wall, and fixing the peripheral wall to a pillar of a structure. Here, a protruding seat having a certain thickness is formed protruding outward from the outer surface of the peripheral wall on the left wall side, and the outer surface of the peripheral wall on the right wall side is formed flat without a protruding seat. When the left wall on which the protruding seat is formed is fixed with the fixing screw, the peripheral wall can be fixed in a state separated from the pillar, and when the right wall on which the protruding seat is not formed is fixed with the fixing screw, the peripheral wall can be fixed in a state where the outer surface of the peripheral wall is directly abutted against the pillar.

The wiring device mounting member described in Patent Document 2 has a protruding seat provided on each outer surface of the peripheral wall on the left side wall and the peripheral wall on the right side wall, and each fixing portion protrudes from the outer surface of each peripheral wall, so that the outer surface of the peripheral wall can be fixed in a state where it is spaced apart from the pillar regardless of whether the protruding seat on the left side wall or the right side wall is abutted against the pillar. In addition, a rib is formed around the entire circumference of the tip of the opening side of the peripheral wall, which protrudes outward with the same length as the protruding seat and abuts against the wall surface of the building.

The wiring device mounting member described in Patent Document 3 has a flange formed around the entire circumference of the end of the opening side of the peripheral wall that protrudes outward and abuts against the wall surface of the building, and by cutting or bending the flange portion on the side where the pillar is to be fixed, the outer surface of the peripheral wall is fixed in direct abutment against the pillar.

JP 2005-51990 A JP 2010-119219 A JP 2013-247813 A

The wiring device mounting member installed behind the wall can be firmly fixed to the wall by clamping the periphery of the through hole in the wall with the wiring device mounting frame that holds the wiring device placed on the front of the wall. However, the wiring device mounting member in Patent Document 1 has only an end face at the tip of the opening side of the peripheral wall all the way around, so the contact area with the back of the wall is small and it cannot be stably fixed to the wall.

In contrast, the wiring device mounting members of Patent Documents 2 and 3 have ribs and flanges around the entire circumference of the open end of the peripheral wall, so that the contact area with the back surface of the wall is larger than that of Patent Document 1, and can be stably fixed to the wall surface. However, the wiring device mounting member of Patent Document 2 has protruding seats on the left and right peripheral walls, and all of the fixing parts protrude from the outer surface of the peripheral wall, so that all of the fixing parts can only be fixed in a state where the outer surface of the peripheral wall is separated from the pillar. On the other hand, the wiring device mounting member of Patent Document 3 does not have anything equivalent to a protruding seat on the peripheral wall, and the fixing parts do not protrude from the outer surface of the peripheral wall, so that all of the fixing parts can only be fixed in a state where the outer surface of the peripheral wall is directly abutted against the pillar. Thus, in the past, it was necessary to use different wiring device mounting members configured as in Patent Documents 2 and 3 depending on the situation at the site, which was troublesome.

The present invention aims to provide a wiring device mounting member that can be stably fixed to the wall of a building and can be fixed either with the outer surface of the surrounding wall spaced apart from the structure or directly in contact with it, depending on the site conditions.

The wiring device mounting member of claim 1 is fixed to a structure behind a wall, and a wiring device to be installed on the surface of the wall is attached to the wiring device mounting member,
The wiring device includes a peripheral wall having a rectangular frame shape formed by four side walls, and a wiring device attachment portion to which the wiring device is attached,
A pair of side walls constituting opposing short sides of a rectangle are provided with fixing portions for fixing the outer surfaces of the side walls in abutment against the structure,
A protruding seat portion having a tip end side that abuts against the structure is formed on one of a pair of side walls that constitute the short side, and protrudes outward,
The pair of side walls constituting the opposing long sides of the rectangle and the other of the pair of side walls constituting the short sides are provided with a wall back abutment portion at an end facing the wall surface of the building, which protrudes outward from its outer surface and abuts against the wall surface;
A weakened portion is formed on the base end side of the wall back abutment portion provided on the other side wall constituting the short side, for removing a portion that protrudes outward from the outer surface of the other side wall.

The wiring device mounting member of claim 2 is particularly provided, at an end portion facing the wall surface of one of the side walls of the short side, with a second wall-back abutment portion which abuts against the wall surface together with the wall-back abutment portions provided on a pair of side walls constituting the long side.
In the wiring device mounting member of claim 3, particularly when the base end side of the weak portion is cut or broken off to remove the portion protruding outward from the outer surface of the other side wall of the short side, a piercing portion that protrudes from the outer surface of the other side wall and pierces a structure is formed exposed on the outer surface of the other side wall.

In the present invention, the peripheral wall is provided with a back-of-wall abutment portion that protrudes outward from its outer surface, so that the abutment area with the back surface of the wall at the opening is large, and the wiring device mounting member can be stably fixed to the wall surface by clamping the periphery of the through hole in the wall surface between the wiring device mounting member and the wiring device mounting frame that holds the wiring device.
In addition, since a protruding seat portion is formed on one of a pair of side walls constituting the opposing short sides of the rectangle, the wiring device mounting member can be fixed with the outer surface of the peripheral wall spaced apart from the structure. Also, since a weak portion is formed on the base end side of the wall back abutment portion provided at the end of the other of the pair of side walls constituting the short side, by removing the portion of the weak portion that protrudes outward from the outer surface of the other side wall, the wiring device mounting member can be fixed with the outer surface of the peripheral wall directly abutting against the structure.
This eliminates the need to prepare and use different types of wiring device mounting members to fasten them to structures depending on the situation at the site.

1A is a perspective view of a wiring apparatus attachment member according to a first embodiment of the present invention, and FIG. 1B is a partially cutaway perspective view in which one side wall of a pair of opposing long sides of FIG. FIG. 2 is a plan view of the wiring device attachment member of FIG. 1 . FIG. 2 is a perspective view showing a state in which the wiring apparatus mounting member of FIG. 1 is fixed to a pillar. 2 shows a state in which the wiring apparatus mounting member of FIG. 1 is fixed to a pole, and the wiring apparatus mounting member has a cross-sectional shape taken along line A--A of FIG. 2 is a perspective view of the wiring device mounting member in which a part of the wall back abutment portion of FIG. 1 has been removed at a weakened portion. FIG. 6 is a perspective view showing a state in which the wiring apparatus mounting member of FIG. 5 is fixed to a pillar. FIG. 6 is a cross-sectional view showing the wiring apparatus mounting member of FIG. 5 fixed to a pillar. 2 is a cross-sectional view showing a state in which a wiring device is installed on a wall surface using the wiring device mounting member of FIG. 1 . FIG. 11 is a perspective view showing a wiring apparatus attachment member according to a second embodiment of the present invention. 10 is a perspective view showing a state in which the wiring apparatus mounting member of FIG. 9 is fixed to a pillar. FIG. 2 is a cross-sectional view showing a state in which the wiring device mounting member of FIG. 1 is fixed between two pillars. FIG.

First Embodiment
Hereinafter, a wiring device attachment member according to a first embodiment of the present invention will be described with reference to the drawings.
The wiring device mounting member is fixed to a structure such as a pillar or furring strip behind a wall such as a partition wall of a building with its front surface facing the front surface of the wall, and wiring devices such as switches and outlets to be installed on the front surface of the wall are attached to the wiring device mounting member. In this embodiment, the wiring device mounting member is fixed to a pillar as a structure.

1 and 2, the wiring device mounting member 1 is made of synthetic resin or the like, and is formed into a square box shape with one side open by a bottom wall 10 and a peripheral wall 20 standing upright from the bottom wall 10, and the peripheral wall 20 is formed into a rectangular frame shape by four side walls. The wiring device mounting member 1 also has a wiring device mounting section 34 to which the wiring device 70 is attached via a wiring device mounting frame 71. The peripheral wall 20 is formed with a pair of side walls 21, 22 that form opposing short sides of the rectangle, and a pair of side walls 23, 24 that form opposing long sides of the rectangle. Each component part will be described below.

A pair of side walls 21, 22 that form the opposing short sides of the rectangle are each provided with a fixing portion 25 that fixes the wiring device mounting member 1 with its outer surface abutting the pillar 60. Each fixing portion 25 has two through-holes 26 formed in the peripheral wall 20 that extend in a direction perpendicular to the bottom wall 10, and the wiring device mounting member 1 is fixed to the pillar 60 by driving fixing screws 50 that penetrate the side walls into the long holes 26.

A protruding seat 27, the tip of which abuts against the pillar 60, is formed on one side wall 21 of the short side and protrudes outward from the peripheral wall 20. The protruding seat 27 is arranged on the outer surface of the peripheral wall 20 in an approximately U-shape, and the tip surface shown in FIG. 1(a) as a dot pattern is the abutment surface 27a that abuts against the pillar 60 and is located at a position protruding a predetermined length from the outer surface of the peripheral wall 20. A total of four wedge-shaped protrusions 27b are provided on the abutment surface 27a of the protruding seat 27, which bite into the outer surface 62 of the pillar 60 when fixed. Two elongated plate-like reinforcing ribs 28 are provided inside the protruding seat 27 arranged in an approximately U-shape, and the long hole 26 is formed in the peripheral wall 20 between these protruding seats 27 and the reinforcing ribs 28. One of the short side walls 21 thus formed is thicker overall than the other side wall 22, and when fixed to one side wall 21, the wiring device mounting member 1 is fixed in a state in which the outer surface of the peripheral wall 20 is spaced apart from the outer surface 62 of the pillar 60 by the outward protruding length of the protruding seat 27.

A pair of side walls 23, 24 constituting the opposing long sides of the rectangle, and the other side wall 22 constituting the short side, are provided with a wall-back abutment portion 29 that protrudes outward from its outer surface at the end on the opening 40 side, i.e., the end facing the wall surface 64 of the building. In addition, a second wall-back abutment portion 30 is formed on the side facing the wall surface 64 of one side wall 21 constituting the short side. This second wall-back abutment portion 30 is formed on the same plane as the wall-back abutment portion 29, and abuts against the wall surface 64 together with the wall-back abutment portion 29. The end faces of these wall-back abutment portions 29, the second wall-back abutment portion 30, and the opening 40 side of the peripheral wall 20 abut against the wall surface 64 in a planar manner as a whole. The entire abutment portions are shown as shaded areas in FIG. 1(a). These abutment portions clamp the wall material 63 with the wiring device mounting frame 71 arranged on the wall surface. These contact surfaces are formed to be smooth, but may be formed to be somewhat rough to prevent slipping with the wall surface 64.

A weak portion 32 is formed on the base end side 31 of the wall-back abutment portion 29 formed on the other side wall 22 constituting the short side, in order to remove the portion that protrudes outward from the outer surface of the other side wall 22 so that the outer surface of the other side wall 22 can abut against the column 60. The weak portion 32 is formed by providing two through grooves 32a on the base end side 31 of the wall-back abutment portion 29, forming a narrow connecting portion 32b between the two through grooves 32a that connects the tip end of the peripheral wall 20 and the wall-back abutment portion 29, and forming a thin V-groove 32c at both ends in the width direction. When the base end side 31 of the weak portion 32 is cut or broken off to remove the portion that protrudes outward from the outer surface of the other side wall 22, a burr is generated on the narrow connecting portion 32b as shown in FIG. 5, and the burr becomes a piercing portion 33 that protrudes from the outer surface of the other side wall 22 and pierces the column 60, and is exposed on the outer surface of the other side wall 22. In addition, the other side wall 22 does not have a protruding seat 27, so the outer surface of the other side wall 22 coincides with the outer surface of the peripheral wall 20 in this portion.

A boss portion 34a is integrally provided on the inner surface of a pair of side walls 21, 22 that constitute the short side, and a mounting hole 34b is provided in the center of the boss portion 34a to which a mounting screw 51 for mounting a wiring device mounting frame 71 that holds a wiring device 70 is attached. A nut is inserted into the boss portion 34a through a nut insertion hole 34c provided in each of the pair of side walls 21, 22 on the short side, and the mounting screw 51 is screwed into the nut. The tip of the boss portion 34a on the opening 40 side is located at a position retreated toward the inside of the wiring device mounting member 1 from the opening surface 41 of the wiring device mounting member 1. This is to prevent the tip of the boss portion 34a from being scratched or damaged by a drilling blade or a drawing saw when a through hole 65 is formed in the wall surface 64 using a drilling tool or the like. These boss portions 34a and mounting holes 34b constitute the wiring device mounting portion 34. The wiring device mounting frame 71 is installed between a pair of wiring device mounting parts 34, 34 by attaching mounting screws 51 to the mounting holes 34b on both sides.

As shown in Figures 2 and 4, the distance S1 between the outer surface of one of the short side walls 21 and the wiring device mounting portion 34 on the inner side is greater than the distance S2 between the outer surface of the other short side wall 22 and the wiring device mounting portion 34 on the inner side.

A pair of side walls 23, 24 that make up the long sides have cable introduction holes 35 formed near the bottom wall 10, and the cable 72 on the back side of the wall is pulled into the wiring device mounting member 1 through the cable introduction holes 35.

Next, the bottom wall 10 is provided in the center with a detectable portion 11 for detecting the position of the opening 40 of the wiring device mounting member 1 on the back side of the wall from the front side of the wall before forming the through hole 65 in the wall surface 64 after the wall surface 64 has been erected. The detectable portion 11 is formed in a cylindrical shape and has a magnet embedded therein, and the position of the magnet is detected from the front side of the wall by magnetic force. The bottom wall 10 is also provided with two fixing holes 12 for use when fixing the bottom wall 10 to the wall surface 64. Furthermore, the bottom wall 10 is provided with two cable introduction holes 13 formed by punching a knock.

To install the wiring device 70 on a wall material 63 such as a partition wall using the wiring device mounting member 1 of this embodiment configured as described above, the fixing screw 50 is inserted into the long hole 26 of the fixing portion 25 of one of the short side walls, and the wiring device mounting member 1 is fixed to the outer surface 62 of the pillar 60 behind the wall. When fixing to the pillar 60 at one side wall 21 on the short side, as shown in Figures 3 and 4, the abutment surface 27a at the tip of the protruding seat 27 provided on one side wall 21 abuts against the pillar 60, and the wiring device mounting member 1 is fixed in a state in which the outer surface of the peripheral wall 20 is separated from the outer surface 62 of the pillar 60 by the amount that the protruding seat 27 protrudes outward. Then, the protrusion 27b of the protruding seat 27 bites into the surface of the pillar 60. At this time, the front surfaces of the wall back abutment portion 29 and the second wall back abutment portion 30 are fixed so as to be flush with the front surface 61 of the pillar 60.

On the other hand, when fixing the other side wall 22 on the short side to the pillar 60, the weak part 32 of the wall back abutment part 29 is cut or broken off to remove the part that protrudes outward from the outer surface of the other side wall 22. When this part is removed, the piercing part 33 that pierces the pillar 60 is exposed on the outer surface of the other side wall 22, as shown in FIG. 5. Then, as shown in FIG. 6, the fixing screw 50 is inserted through the long hole 26 of the fixing part 25 of the other side wall 22 on the short side to fix it to the pillar 60. Then, as shown in FIG. 7, the piercing part 33 exposed and formed in the weak part 32 pierces the pillar 60, and the other side wall 22 is fixed with its outer surface directly abutting the outer surface 62 of the pillar 60.

In this way, after the wiring device mounting member 1 is fixed to the pillar 60, the cable 72 is drawn into the wiring device mounting member 1. The cable 72 may be drawn into the wiring device mounting member 1 before being fixed to the pillar 60. After this, the wall material 63 is erected so as to abut against the front surface 61 of the pillar 60 and the wall back abutment portion of the wiring device mounting member 1. After the wall material 63 is erected, a through hole 65 is formed in the wall material 63, and the pair of wiring device mounting portions 34, 34 of the wiring device mounting member 1 are exposed to the wall surface through the through hole 65. At this time, the tip of the boss portion 34a which is the wiring device mounting portion 34 is located at a position retreated a predetermined distance from the opening surface 41 toward the bottom wall 10 side, so that the wiring device mounting portion 34 is not damaged by the drilling blade of the drilling tool or the pull saw when the through hole 65 is formed. Next, the cable 72 in the wiring device mounting member 1 is drawn to the wall surface through the through hole 65 and connected to the wiring device 70 held by the wiring device mounting frame 71. Then, while pushing the cable 72 back to the back side of the wall, attach the mounting screw 51 to the mounting hole 34b of the wiring device mounting part 34 to attach the wiring device mounting frame 71. As a result, the wiring device 70 is installed on the surface of the wall via the wiring device mounting frame 71, as shown in FIG. 8.

Next, the operation of the wiring device mounting member 1 of the first embodiment will be described.
The wiring device mounting member 1 has a back-of-wall abutment portion 29 on the peripheral wall 20 that protrudes outward from the outer surface of the peripheral wall 20, so that the abutment area with the wall surface 64 is large, and the back-of-wall abutment portion 29 is also provided on the other side wall 22 on the short side away from the pillar 60, so that the wiring device mounting member 1 can be stably fixed to the wall surface 64.

Here, the wall abutment portion is provided as a second wall abutment portion 30 on one side wall 21 constituting the short side in addition to the wall abutment portion 29 provided on the pair of side walls 23, 24 constituting the long side and the other side wall 22 constituting the short side. Therefore, when the wiring device mounting member 1 is fixed on the other side wall 22 on the short side, the second wall abutment portion 30 abuts against the wall surface 64 even at the position of the one side wall 21 away from the pillar 60, so that the wiring device mounting member 1 is more stably fixed to the wall surface 64.

In addition, since the protruding seat 27 is formed on one side wall 21 constituting the short side and protrudes outward, the wiring device mounting member 1 can be fixed with the outer surface of the peripheral wall 20 spaced apart from the pillar 60. Also, since the weak portion 32 is formed on the base end side 31 of the wall back abutment portion 29 provided on the other side wall 22 constituting the short side, the portion protruding outward from the outer surface of the other side wall 22 can be easily removed by the weak portion 32, and by removing the weak portion 32, the wiring device mounting member 1 can be fixed with the outer surface of the peripheral wall 20 on the other side wall 22 side directly abutting against the pillar 60. This eliminates the need to prepare and use different types of wiring device mounting members 1 to fix them to the pillar 60 depending on the situation at the site, improving workability.

In addition, by cutting or breaking off the base end side 31 of the fragile portion 32 formed in the wall back abutment portion 29 of the other side wall 22 on the short side, the piercing portion 33 protruding as a burr from the outer surface of the other side wall 22 is exposed and formed on the outer surface of the other side wall 22. When the wiring device mounting member 1 is fixed to the pillar 60, as shown in FIG. 7, the piercing portion 33 bites into the outer surface 62 of the pillar 60, and when the fixing screw 50 is inserted into the long hole 26 of the fixing portion 25 to attach the wiring device mounting member 1, the wiring device mounting member 1 can be prevented from rotating around the fixing screw 50 as the fixing screw 50 rotates when the fixing screw 50 is inserted into the long hole 26 of the fixing portion 25. In addition, since the piercing portion 33 of the other side wall 22 pierces the pillar 60, even if the fixing screw 50 is inserted into only one of the two long holes 26, the wiring device mounting member 1 can be prevented from rotating or tilting around the fixing screw 50 after fixing, and stable fixation can be maintained.

Second Embodiment
Next, a wiring apparatus mounting member 2 according to a second embodiment of the present invention will be described with reference to FIGS.
The wiring device mounting member 2 of the second embodiment is larger overall than the wiring device mounting member 1 of the first embodiment, with a pair of side walls 21, 22 on the short sides being wider, and with a plurality of pairs of opposing wiring device mounting portions 34 provided on the long side. The wiring device mounting member 2 of the second embodiment will be described below, focusing on the differences from the wiring device mounting member 1 of the first embodiment.

In FIG. 9, the wiring device mounting member 2 is formed into a rectangular box shape with one side open by a bottom wall 10 and peripheral walls 20. The peripheral walls 20 are formed with a pair of side walls 21, 22 that form opposing short sides of the rectangle, and a pair of side walls 23, 24 that form opposing long sides of the rectangle. The pair of side walls 21, 22 on the short side are provided with fixing parts 25 for fixing the wiring device mounting member 2, and one side wall 21 on the short side is formed with a protruding seat part 27 that protrudes outward and has an abutment surface 27a at its tip that abuts against the pillar 60. The abutment surface 27a is shown in FIG. 9 as a dotted pattern.

A pair of side walls 23, 24 that form the opposing long sides of the rectangle, and the other side wall 22 that forms the short side, are provided with wall back abutment portions 29 that protrude outward from their outer surfaces, and one side wall 21 that forms the short side is also formed with a second wall back abutment portion 30. These wall back abutment portions 29, second wall back abutment portions 30, and the end surface of the peripheral wall 20 on the opening 40 side are shown in FIG. 9 with shading.

Furthermore, a weak portion 32 is formed on the base end side 31 of the wall-back abutment portion 29 formed on the other side wall 22 constituting the short side. The weak portion 32 is formed by providing three through grooves 32a on the base end side 31 of the wall-back abutment portion 29, forming narrow connecting portions 32b between the three through grooves 32a that connect the tip end of the peripheral wall 20 and the wall-back abutment portion 29, and forming thin V-grooves 32c at both ends in the width direction. When the weak portion 32 is cut or broken off, a burr-like piercing portion 33 is generated on the outer surface of the other side wall 22, as in the first embodiment.

A number of bosses 34a are integrally formed on the inner surface of a pair of side walls 23, 24 that form the long sides, and a mounting hole 34b is provided in the center of each boss 34a, into which a mounting screw 51 for mounting the wiring device mounting frame 71 is attached. There are a total of three pairs of opposing wiring device mounting parts 34, 34, each consisting of a boss 34a and a mounting hole 34b.

Figure 10 shows the wiring device mounting member 2 of the second embodiment configured in this way, fixed to the pillar 60 at one side wall 21 on the short side. In this fixed state, the outer surface of the peripheral wall 20 at one side wall 21 on the short side is separated from the pillar 60 by the protruding length of the protruding seat 27. When fixing to the pillar 60 at the other side wall 22 on the short side, as in the first embodiment, the fragile portion 32 at the base end side 31 of the wall back abutment portion 29 is cut or broken off to remove the outwardly protruding portion and fixed to the pillar 60. In this fixed state, the outer surface of the peripheral wall 20 at the other side wall 22 on the short side directly abuts the pillar 60.

In the above embodiments, the wiring device mounting member is fixed to the pillar 60 in a cantilevered state by one side wall 21 or the other side wall 22 that constitutes the short side. However, as shown in FIG. 11, the opposite side wall away from the pillar 60 may also be fixed to another pillar 66 or a separately provided auxiliary pillar. When fixed in a double-supported state by both side walls that constitute the short side, the wiring device mounting member is stably fixed to each pillar. Therefore, when a through hole 65 is formed in the wall surface 64 with a drilling tool or a pull saw, the wiring device mounting member is held in a fixed position, making it easy to form the through hole 65.

In addition, while the protruding seat 27 in each of the above embodiments is formed on one of the side walls 21 on the short side, it may be formed on either of the pair of side walls 23, 24 that make up the long side. Furthermore, it may be formed on both one of the side walls on the short side and one of the side walls on the long side, in which case the wiring device mounting member can be fixed to the pillar 60 in either the vertical or horizontal orientation.

In each of the above embodiments, one of the side walls 21 on the short side is formed to protrude outward from the peripheral wall 20 by forming a protruding seat 27 on the peripheral wall 20, but this is not limited thereto, and the entire side wall 21 may be formed to be thick so that it protrudes outward from the peripheral wall 20.

Furthermore, the second wall back abutment portion 30 formed on one of the side walls 21 on the short side of each of the above embodiments is not necessarily required.

The weak portion 32 provided in the wall back abutment portion 29 is formed by providing through grooves 32a on the base end side 31 of the wall back abutment portion 29, forming narrow connecting portions 32b between the multiple through grooves 32a, and forming V-shaped grooves 32c with thin walls at both ends in the width direction, but is not limited to this and may be formed only with through holes 32a and narrow connecting portions 32b, or may be formed only with thin grooves, or may be formed by other means.

In addition, the piercing portion 33 protruding from the outer surface of the other side wall 22 is formed by burrs generated by cutting or breaking off the narrow connecting portion 32b, but may be formed separately. For example, the piercing portion 33 may be formed protrudingly in the through groove 32a between the narrow connecting portion 32b and the V-groove 32c without being connected to the wall back abutment portion 29, and may be exposed on the outer surface of the other side wall 22 by cutting or breaking off the wall back abutment portion 29.

The wall-back abutment portion 29 can be cut off at the weak portion 32, or the weak portion 32 can be formed with a hinge, and a step can be provided on the outer surface of the peripheral wall 20 to form a storage recess in which the wall-back abutment portion 29 can be stored overlapping the outer surface of the peripheral wall 20. By bending the weak portion 32, the portion that protrudes outward from the outer surface of the other side wall 22 can be stored overlapping the storage recess on the outer surface of the peripheral wall 20, thereby fixing the outer surface of the peripheral wall 20 in a state where it is directly abutted against the pillar 60.

In addition, each wiring device mounting member is formed in a rectangular box shape, but may also be formed in a square box shape, polygonal box shape, etc.

In the above embodiment, the wiring device mounting member is described as being fixed to a pillar 60 as a structure, but the wiring device mounting member of the present invention can also be fixed to a horizontally arranged furring strip, etc.

REFERENCE SIGNS LIST 1 Wiring device mounting member of first embodiment 29 Wall back abutment portion 2 Wiring device mounting member of second embodiment 30 Second wall back abutment portion 20 Peripheral wall 31 Base end side 21 One side wall constituting the short side 32 Weak portion 22 Other side wall constituting the short side 33 Piercing portion 23, 24 Pair of side walls constituting the long side 34 Wiring device mounting portion 25 Fixing portion 60 Pillar 26 Long hole (fixing portion) 64 Wall surface 27 Protruding seat portion (fixing portion) 70 Wiring device

Claims (3)

A wiring device mounting member that is fixed to a structure behind a wall and to which a wiring device to be installed on the surface of the wall is attached,
The wiring device includes a peripheral wall having a rectangular frame shape formed by four side walls, and a wiring device attachment portion to which the wiring device is attached,
A pair of side walls constituting opposing short sides of a rectangle are provided with fixing portions for fixing the outer surfaces of the side walls in abutment against the structure,
A protruding seat portion having a tip end side that abuts against the structure is formed on one of a pair of side walls that constitute the short side, and protrudes outward,
The pair of side walls constituting the opposing long sides of the rectangle and the other of the pair of side walls constituting the short sides are provided with a wall back abutment portion at an end facing the wall surface of the building, which protrudes outward from its outer surface and abuts against the wall surface;
A wiring device mounting member characterized in that a weak portion is formed on the base end side of the wall back abutment portion provided on the other side wall constituting the short side, for removing the portion protruding outward from the outer surface of the other side wall. The wiring device mounting member according to claim 1, characterized in that a second wall-back abutment portion is provided at an end of one of the short side walls facing the wall surface, and abuts against the wall surface together with the wall-back abutment portions provided on the pair of side walls that constitute the long side. The wiring device mounting member according to claim 1 or 2, characterized in that when the base end side of the fragile portion is cut or broken off to remove the portion that protrudes outward from the outer surface of the other side wall of the short side, a piercing portion that protrudes from the outer surface of the other side wall and pierces the structure is formed exposed on the outer surface of the other side wall.

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