JP3472790B2 - Wiring box - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION Conventionally, for example, the front surface of an opening of a wiring box arranged behind the wall at the same position such as an indoor wall separating two adjacent rooms faces the wall surface of each room, such as an outlet or a switch. As shown in FIG. 9, a wiring box having a front opening is provided, for example, at substantially the same position on adjacent indoor walls, as shown in FIG. There was a case in which the openings were fixed toward the interior of each room in a back-to-back state, and the front surface was almost entirely exposed to the wall surface of each room.

Also, as shown in FIG. 10, there is proposed a bottomed wiring box having openings on opposite sides,
Arranged at a desired predetermined position such as the interior wall that separates the two chambers,
By forming through holes in the interior walls of the two adjacent chambers, substantially the entire surfaces of the interior walls that open to the wall surface are exposed.

[0003]

However, in the method (FIG. 9) in which two wiring boxes are placed back to back at the same position on the interior wall, it is necessary to fix each wiring box to the back of the wall. However, since the wiring box needs to be aligned, these operations are very troublesome, the workability is poor, and the wiring box is easily displaced.

On the other hand, when a wiring box having openings on both sides is used (FIG. 10), it is necessary to prepare and store a large number of wiring boxes having different depths in advance, which makes parts management troublesome. At the same time, it had to be prepared in advance each time and brought to the work site. In addition, this wiring box has the inconvenience that the distance from the opening surface at one end to the opening surface at the other end does not change and it is not possible to deal with it freely if the thickness of the indoor wall is different. When it was delivered to the site, there was a problem that it was not possible to work according to schedule.

The present invention has been made in view of the above circumstances, and the problem to be solved is to solve the above problems that the conventional wiring box has. For example, two adjacent chambers are separated from each other. It is an object of the present invention to provide a wiring box in which the opening surfaces of the wiring boxes arranged at substantially the same positions such as interior walls can be exposed to the wall surface of each room.

[0006]

[Means for Solving the Problems] Claims 1 to 6
The wiring box described first connects two wiring boxes.
Can be used alone without binding. Further, in particular, where the mode of the invention of claim 1 for solving the above-bottom
In order to have an opening on the wall surface of the building wall while having a wall,
The wiring box is installed behind the wall, and the bottom wall of the wiring box has the back surfaces of these two wiring boxes
Place the wiring boxes back to back together.
And a connecting means for connecting to the
Is smaller than the screw head of the screw, and is the male of the screw.
On the bottom wall of the wiring box with a diameter larger than the screw part
The large-diameter screw hole that is formed and into which the screw is inserted, and the screw
On the bottom wall of the wiring box, the size of which the male screw part is screwed
Consists of at least one pair of formed small-diameter screw holes
The back of the two wiring boxes back to back
At this time, the large-diameter screw formed on the one wiring box
Hole and the small diameter screw hole formed in the other wiring box
The wiring boxes are characterized by matching each other.
By configuring in this way, one wiring box
Insert a screw from the formed large-diameter screw hole side, and
Screwing into a small-diameter screw hole formed in the wiring box
Thus, the two wiring boxes are fastened. By this
The wiring box with the two wiring boxes back to back.
The positions of the wires are less likely to be displaced, and as a result, the wiring
When mounting the box on the wall, use two wiring boxes
Eliminates the need for work to reposition each other
Therefore, workability can be improved. Furthermore, for screwing the screws
Of one of the two wiring boxes
The bottom wall is the bottom wall of the other wiring box and the screw head of the screw.
Because it is sandwiched firmly as if it is sandwiched between two
Assemble the wiring box by tightening the screws.
Will be things.

The gist of the invention of claim 2 is that the bottom
In order to have an opening on the wall surface of the building wall while having a wall,
A wiring box installed behind a wall, the wiring box
On the bottom wall of the box, connect the backsides of these two wiring boxes to each other.
Place the wiring boxes back to back together.
And a connecting means for connecting to the
Are formed on the bottom wall of each wiring box and are
It is composed of multiple screw holes into which
Each screw hole has the same diameter, and the two wiring boxes
One wiring box with back sides back to back
On the other wiring box and the screw hole formed on
The wiring box is characterized in that the screw holes and the screw holes match each other . With this configuration, one wiring
Insert the screw from the screw hole side formed on the box to
Either screw it into the screw hole formed in the wiring box, or
From the screw hole side formed on one wiring box.
Insert the bolt into the other wiring box.
After screwing it through the screw hole,
Connect two wiring boxes with screws or bolts
To do. This makes the two wiring boxes back to back
Position of the wiring boxes is not likely to
As a result, when mounting the wiring box on a wall,
Work to re-align two wiring boxes
Since work is unnecessary, workability can be improved. Furthermore, two
When connecting two wiring boxes with screws,
When screwing in, connect the wiring box on one of the two wiring boxes.
The bottom wall of the box is the same as the bottom wall of the other wiring box.
Because it is firmly sandwiched as if it is sandwiched between the head,
Assembly of the two wiring boxes is done by fastening the screws.
It will be strong.

The gist of the invention of claim 3 is that the bottom
In order to have an opening on the wall surface of the building wall while having a wall,
A wiring box installed behind a wall, the wiring box
On the bottom wall of the box, connect the backsides of these two wiring boxes to each other.
Place the wiring boxes back to back together.
And a connecting means for connecting to the
Engages with an engaging protrusion formed on the bottom wall of the wiring box.
It consists of a stop hole and the back side of the two wiring boxes.
Inside the two wiring boxes, back to back
The engaging protrusions formed on one wiring box
By engaging the locking holes formed in the wire box,
A wiring characterized by connecting two wiring boxes.
It is a line box. With this configuration,
The two wiring boxes are back to back
In one of the two wiring boxes,
The engaging protrusion formed on the other wiring box
By engaging the stop hole, the two wiring boxes
Connection is achieved. This allows the two wiring boxes to be
There is a positional deviation between the wiring boxes when they are aligned.
As a result, when mounting the wiring box on a wall,
Then, reposition the two wiring boxes.
Since work for maintenance is unnecessary, workability is improved.
It

The gist of the invention of claim 4 is that in the wiring box according to any one of claims 1 to 3, a through hole for wiring is formed in the bottom wall of each wiring box. When the rear surfaces of the two wiring boxes are connected to each other in a back-to-back state, the through holes are overlapped with each other so that the two wiring boxes communicate with each other. This
This allows the two wiring boxes to be placed back to back.
Positional deviation of the wiring box is unlikely to occur, and since the through holes provided in each wiring box are one through hole that communicates with the wiring boxes in a back-to-back state, the wiring passes through the through holes. Not only the work is facilitated, but the use of the through-holes communicating with each other makes it possible to share the lead-in electric wire, facilitates the feeding of the wiring, and improves the work efficiency of the wiring work.

The gist of the invention of claim 5 is that the bottom
In order to have an opening on the wall surface of the building wall while having a wall,
A wiring box device provided with a wiring box installed on the back of a wall and a screw for connecting two of the wiring boxes, wherein two of the wiring boxes are connected to each other on a bottom wall of the wiring box. Screw holes are provided so as to coincide with each other in a back-to-back state, and the wiring boxes are connected in a back-to-back state by screwing the screws in a state where the screw holes are coincident with each other. It is a wiring box device. To configure like this
From the screw hole side formed on one wiring box.
Screw hole formed in the other wiring box
The two wiring boxes are fastened by screwing
It This made the two wiring boxes back to back
In the state, it is difficult for the wiring boxes to move out of position.
As a result, when mounting the wiring box on the wall, two
Work to re-align the wiring boxes
Since work is unnecessary, workability can be improved. Also, the
One of the two wiring boxes when screwing
The bottom wall of the box and the bottom wall of the other wiring box
It was pinched firmly as if it were pinched with the screw head.
Therefore, the two wiring boxes must be assembled by fastening the screws.
Will be strong. Further, with the gist of the invention of claim 6,
The place where the wiring box device according to claim 5 is
The screw hole formed in one of the two wiring boxes.
The screw has a smaller diameter than the screw head and the male screw of the screw
With a large-diameter screw hole formed in a larger diameter than the part,
Insert the screw hole formed in the other wiring box into the male
A small-diameter screw hole formed to fit the screw part,
One of the two wiring boxes back to back
Large-diameter screw holes in the wiring box and the other wiring
The small diameter screw holes provided in the box match each other,
The screw is inserted from the large diameter screw hole side to
By screwing it into the screw hole of
Box to be connected back to back.
And are characterized by. To configure like this
Side of the large diameter screw hole formed in one wiring box
Insert the screw from the formed on the other wiring box
By screwing into a small-diameter screw hole, two wiring boxes
Are fastened. This allows the two wiring boxes to be
There is a positional deviation between the wiring boxes when they are aligned.
Flip difficult, as a result, the time to attach the wiring box in the wall
Then, reposition the two wiring boxes.
Since work for maintenance is unnecessary, workability is improved.
It Also, when screwing the screws, the two wiring boxes
The bottom wall of one wiring box in the
Tightened by being sandwiched between the bottom wall and the screw head
Since the two wiring boxes are attached to the
It becomes stronger by fastening the screws.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The wiring box according to the present invention comprises at least a connecting means or an engaging means for connecting or engaging the rear surfaces of two wiring boxes so that they are back to back. It is a wiring box that can be used alone and can be used, for example, by arranging it at substantially the same position on the back surface of the wall material 8 that separates two adjacent chambers so that the opening surface faces the respective wall surfaces.

The present invention will be described below in detail with reference to the drawings. 1 is a plan view of a wiring box 10a according to an embodiment of the present invention, FIG. 2 is a partially cutaway perspective view showing a state in which the back surfaces are back to back, and FIG. 3 is a cross-sectional view of an essential part of FIG. is there.

In the figure, a through hole 2a for forming a through hole 2 for wiring through which an electric wire for wiring (not shown) is inserted is provided in the center portion of the bottom wall of the wiring box main body 1, and the through hole 2a is provided. A pair of screw holes 3a and 3b are formed such that the center position of the hole 2a is point-symmetrical. The diameter of the screw hole 3a is smaller than that of the screw head 4a of the screw 4 and larger than that of the male screw portion 4b. The diameter of the screw hole 3b is larger than that of the male screw portion 4b. Size that can fit
It is formed in a shape.

As shown in the figure, when the two wiring boxes are placed back to back, the screw holes 3a provided in one wiring box and the screw holes 3b provided in the other wiring box are mutually displaced. They can be overlapped with each other, and the male screw portion 4a of a screw 4 such as a tapping screw which is inserted through the screw hole 3a can be screwed into the screw hole 3b provided in the other wiring box.

Further, as shown in the figure, when one wiring box 10a of the two wiring boxes is turned upside down and the wiring boxes are connected to each other in a back-to-back state, a through hole provided in the center of each wiring box. 2a is formed with one through hole 2 which overlaps with each other and communicates between both wiring boxes, and an electric wire for wiring (not shown) can be inserted into the through hole 2.

Therefore, for example, the wiring boxes 10a, 10 are provided at substantially the same position on the back side of the wall member 8 which separates two adjacent chambers.
When arranging the backs of a with their backs facing each other,
Since the wiring boxes 10a and 10a can be tightly joined with their backs being back to back, the wiring box 10a is less likely to be misaligned, the wiring box need not be aligned, and the wiring device 7 such as an outlet or a switch is provided. In doing so, the wiring can be easily fed, the lead-in power supply line can be shared, and the workability of the wiring work can be improved.

The screw hole 3a and the screw hole 3b may be formed in the same shape having the same diameter, but the diameter of the screw hole 3a is smaller than that of the screw head 4a of the screw 4, and the screw hole 3a is male. Is formed to have a larger diameter than the screw portion 4b,
When the diameter of the screw hole 3b is formed to have a size and a shape capable of screwing the male screw portion 4b, the screw 4 is provided from the side of the screw hole 3a toward the screw hole 3b, and the screw hole 3b has a male screw. When the screw portion 4b is screwed, the screw fixing work can be performed extremely smoothly, and the work efficiency can be improved, and
This is very suitable because the bottom wall of the other wiring box 10a can be sandwiched between the screw head 4b and the back surface of the one wiring box 10a so as to be tightly connected to each other.

Also, the connecting means for connecting the wiring box with the backs of the wiring boxes kept back to back with each other is not limited, but instead of fixing with screws with screws through the screw holes, bolts and nuts are fixed through screw holes. Alternatively, it may be anchored via a screw hole.

Instead of the through hole 2a, a knockout structure is formed at the position where the through hole 2a is formed, and the through hole 2a is formed by separating and removing the knockout as required. Alternatively, or in the case where the detected portion is provided on the bottom wall of the wiring box so as to detect the existing position of the wiring box arranged behind the wall, the detected portion is The hole of the bottom wall which is removed and formed by this can be used as the through hole 2a. The same applies hereinafter.

And, in these wiring boxes,
Since it can be used alone, it is not necessary to previously prepare and store a large number of wiring boxes having different depth dimensions as in the conventional case, and the management of parts is simplified.

FIG. 4 is a plan view of a wiring box 10b according to another embodiment of the present invention, and FIG. 5 is a partial view showing a state in which back surfaces are connected back to back in directions orthogonal to each other. It is the broken schematic perspective view.

As shown in the figure, the wiring box 10b is
A through hole 2a for forming a through hole 2 for wiring through which an electric wire for wiring (not shown) is inserted is provided in the center of the bottom wall of the wiring box body 1, and the through hole 2a is provided.
Two pairs of screw holes 3a and 3b are formed with the center position of the point symmetrically. The line connecting the screw holes 3a and 3b forming the screw body 3 of one pair and the line connecting the screw holes 3a and 3b forming the screw body 3 of the other pair are arranged so as to be orthogonal to each other. The distance from the center position of the through hole 2 to the screw hole 3a and the distance from the center position of the through hole 2 to the screw hole 3b are configured to have the same length, and both the screw holes 3a and 3a are formed. The screw hole 3b and the screw hole 3b are arranged below the width-direction axis S and above the width-direction axis A, respectively.

Therefore, as shown in FIG. 5, one wiring box 10b of the two wiring boxes can be turned upside down so that the two wiring boxes are back to back in a state where they intersect with each other. It can be placed behind the wall of the wall material 8 that separates the chambers. That is, on the wall surface of one room, the wiring equipment mounting frame 6 can be mounted in the left-right direction by facing the opening surface of the wiring box in the left-right direction, and on the wall surface of the other room, the wiring box opening can be installed. The wiring device mounting frame 6 can be mounted in the vertical direction with the surface facing in the vertical direction.

Next, FIG. 6 is a schematic perspective view showing a wiring box 10c according to another embodiment of the present invention, and FIG. 7 is a view of FIG. 6A when the rear surfaces of the wiring box 10c are connected back to back. FIG. 9 is a cross-sectional view showing a cross section taken along the line A in FIG.
FIG. 7 is a sectional view showing a B-B section of FIG.

In the figure, engaging projections 9a are formed in pairs and locking holes 9b are formed in pairs at symmetrical positions with the center of the bottom wall of the wiring box 10c as point symmetry. The line connecting the protrusions 9a and the line connecting the pair of locking holes 9b are provided so as to be orthogonal to each other. Further, the distance from the center position of the wiring box to the engagement protrusion 9a and the distance from the center position to the locking hole 9b are configured to have the same length. It is formed in a shape that can be engaged with the hole 9b. Also, the wiring box 10
A removable knockout 9c is formed at a symmetrical position on the longitudinal line passing through the center of the bottom wall of c and having the center of the bottom wall as point symmetry.

Therefore, one wiring box 10c of the two wiring boxes is turned over and both wiring boxes 1 are turned over.
When 0c and 10c are back-to-back with each other, the engaging protrusion 9a provided on one wiring box 10c and the locking hole 9b provided on the other wiring box can be arranged at the overlapping positions, respectively, as shown in FIG. , The engaging projection 9 in the locking hole 9b
a can be engaged, and the rear surfaces of both wiring boxes can be connected to each other with their backs facing each other. At the same time, FIG.
As shown in FIG. 5, the through holes 2a formed by removing the knockouts 9c formed in each wiring box can be arranged at the overlapping positions, and the through holes 2 communicating between the two wiring boxes can be formed.

By the way, the wiring box of the above-mentioned embodiment is described as a typical embodiment of the present invention, and various modifications can be made in designing the present invention. Even a wiring box including a screw hole formed in the center of the box and a protrusion for preventing the wiring box from rotating when the back surfaces of the wiring box are back to back Good (not shown).

Further, the wiring box of the above-mentioned embodiment is
The wiring device mounting frame 6 is mounted, but the mounting method of the wiring device mounting frame 6 and the wiring device 7, the number of wiring devices 7 mounted on the wiring device mounting frame 6, and the like are not particularly limited. Needless to say, the wiring device mounting frame 6 can be applied to the mounting of wiring devices such as dimmers and grounds in addition to the wiring devices of outlets and switches.

[0029]

As described above, in the wiring box according to the first to sixth aspects, first, each wiring box can be used independently without connecting the two wiring boxes. Then, for example, in a state in which one wiring box of the two wiring boxes is turned over and both wiring boxes are placed back to back at substantially the same positions on the front and back sides of a wall material such as an indoor wall separating two adjacent chambers. Since they can be arranged, it is not necessary to previously prepare and store a large number of wiring boxes having different depth dimensions as in the conventional case, and the parts management is simplified. Further, in the wiring box according to claim 1, whether the large-diameter screw hole side formed in one wiring box
Screw is easily inserted and formed in the other wiring box.
The two wiring buttons can be
Socks are easily fastened. This allows the two wiring
Position the wiring boxes back to back
Displacement is unlikely to occur, and as a result, the wiring box is mounted on the wall.
When attaching, reconnect the two wiring boxes
Workability is improved because the work for alignment is unnecessary.
Can be achieved. Also, when screwing the screws,
The bottom wall of one of the wiring boxes
Sandwiched between the bottom wall of one wiring box and the screw head of the screw
So that it is firmly clamped, two wiring boxes
The assembly of the screws is made firm by fastening the screws.
It In addition, the two wiring boxes are back to back
Since it can be assembled in the state, it can share the lead-in wire and
Easy to feed and easy wiring work
It

In the wiring box according to claim 2,
From the screw hole side formed on one wiring box
Insert into the screw hole formed on the other wiring box
Screwed or bead formed on one wiring box
Insert the bolt from the hole side and use the bolt for the other wiring
Screw into the nut and then screwed into the nut
By connecting two wiring boxes with screws or bolts.
Can be connected by. This allows two wiring boxes
Position the wiring boxes so that they are back to back.
Is less likely to occur, resulting in mounting the wiring box on a wall
In doing so, reposition the two wiring boxes.
Improve workability by eliminating the work for
be able to. In addition, screw the two wiring boxes
The two wiring boxes when screwing the screws together.
The bottom wall of one of the wiring boxes
Between the bottom wall of the cous and the screw head of the screw
As it is firmly fastened, the assembly of two wiring boxes
It becomes stronger by fastening the screws.

In the invention described in claim 3, two
With the backs of the wiring boxes back to back,
Formed in one of the two wiring boxes
The engaging projection is attached to the locking hole formed on the other wiring box.
Easy to connect two wiring boxes by engaging
Can be connected. This allows you to connect the two wiring boxes back to back.
It is difficult for the wiring boxes to be misaligned when the wiring boxes are in a tight position.
As a result, when mounting the wiring box on the wall
Repositioned the two wiring boxes
Work is not required, so workability can be improved.
Wear.

The invention according to claim 4 is the invention according to claims 1 to 3.
In the wiring box according to any one of claim 3,
Through holes for wiring are formed on the bottom wall of each wiring box,
Two wiring boxes with backsides back to back
When connecting with each other, the through holes overlap each other and both
Can connect between wiring boxes. This allows two wires
With the boxes back to back
Positional deviation is unlikely to occur, and as a result, the wiring box is placed on the wall.
When installing, position the two wiring boxes
Besides, the work for matching is unnecessary, and the through hole provided in each wiring box is one through hole that communicates with the two wiring boxes in a back-to-back state. Therefore, not only the work of penetrating the wiring into the through hole becomes easy, but also the lead-in electric wire can be shared, and the wiring can be easily fed.
Wiring work efficiency is improved. The invention according to claim 5
, The screw hole side formed in one wiring box
Insert the screw from the formed on the other wiring box
Tighten the two wiring boxes by screwing them into the screw holes.
Can be tied. This allows two wiring boxes to be back to back
It is difficult to cause misalignment between wiring boxes when the
As a result, when mounting the wiring box on the wall
Repositioned the two wiring boxes
Work is not required, so workability can be improved.
Wear. Furthermore, when screwing the screws, two wiring boxes
The bottom wall of one of the wiring boxes
Between the bottom wall of the cous and the screw head of the screw
As it is firmly clamped, the assembly of two wiring boxes
It becomes stronger by fastening the screws. Moreover, the claim
In the invention described in 6, the wiring box is formed on one wiring box.
Insert the screw from the side of the large diameter screw hole
Screwed into a small diameter screw hole formed in the wiring box
With, the two wiring boxes can be easily fastened. This
This allows the two wiring boxes to be placed back to back.
Positional deviation between wiring boxes is less likely to occur, and as a result,
When installing the wiring box on the wall, use two wiring
No need to reposition the boxes
Therefore, the workability can be improved. Furthermore, before
When screwing the screws, one of the two wiring boxes
The bottom wall of the wiring box and the bottom wall of the other wiring box
It is firmly clamped so that it is sandwiched between the screw head and
Therefore, the two wiring boxes are assembled by fastening the screws.
It becomes stronger by.

[Brief description of drawings]

FIG. 1 is a plan view of a wiring box according to an embodiment of the present invention.

FIG. 2 is a partially cutaway schematic perspective view showing a method of using the wiring box of FIG.

FIG. 3 is a cross-sectional view of a main part of FIG.

FIG. 4 is a plan view showing a wiring box according to another embodiment of the present invention.

5 is a partially cutaway schematic perspective view showing a method of using the wiring box of FIG. 4;

FIG. 6 is a plan view showing a wiring box according to another embodiment of the present invention.

7 is a cross-sectional view showing a cross section taken along the line AA of FIG. 6 when the back sides of the wiring boxes of FIG. 6 are connected back to back.

FIG. 8 is a sectional view showing a B-B section of FIG.

FIG. 9 is a sectional view of an essential part showing a conventional wiring box of the related art.

FIG. 10 is a cross-sectional view of an essential part showing another conventional wiring box.

[Explanation of symbols]

1 ... Wiring box body 2 ... Through hole for wiring 2a ... through hole 3 ... Pair of screw holes 3a ... screw hole 3b ... Screw hole 4 ... screw 4a ... Screw head 4b ... Male screw part 5 ... Through hole 6 ... Wiring equipment mounting frame 7 ... Wiring equipment 8 ... Wall material 9a ... Engaging protrusion 9b ... Locking hole 9c ... Knockout 10 ... Wiring box 10a ... wiring box 10b ... Wiring box 10c ... Wiring box

Claims (6)

(57) [Claims] [Claim 1] In order to face the opening in the wall table building wall and having a bottom wall, a wiring box installed in Kabeura, the bottom wall of the wiring box, the two wiring box
This wiring box with the backs of the
A connecting means is provided for connecting them to each other , and the connecting means has a diameter smaller than that of the screw head of the screw.
The wiring box with a diameter larger than the male screw part of the screw.
Large-diameter screw hole that is formed in the bottom wall of the box
And the wiring box is sized so that the male screw part of the screw is screwed.
At least one small diameter screw hole formed in the bottom wall of the box
It is constructed as a pair and the backs of the two wiring boxes are placed behind each other.
It is formed on one of the wiring boxes when the centering is done.
Large diameter screw hole and small diameter formed on the other wiring box
The wiring box is characterized in that the screw holes of
Cous. 2. A bottom wall and an opening in a wall surface of a building wall.
It is a wiring box installed behind the wall to face the
On the bottom wall of the wiring box, these two wiring boxes
This wiring box with the backs of the
Connection means for connecting the two to each other, the connection means being formed on the bottom wall of each wiring box.
Structure with multiple screw holes into which screws or bolts are inserted.
And each screw hole has the same diameter,
With the backs of the wire boxes back to back
Screw holes formed in the wiring box and the other wiring box
The wiring box is characterized in that the screw holes formed on the wiring lines match each other . 3. A bottom wall and an opening on a wall surface of a building wall.
It is a wiring box installed behind the wall to face the
On the bottom wall of the wiring box, these two wiring boxes
This wiring box with the backs of the
The connecting means is provided on the bottom wall of the wiring box.
It is engaging projection and locking hole Toka et arrangement, the two wiring box
Two wires with the backs of the boxes facing each other.
Engagement protrusion formed on one wiring box of the box
Engages with the locking hole formed in the other wiring box
To connect the two wiring boxes together.
Characteristic wiring box. 4. A through hole for wiring is formed on a bottom wall of each of the wiring boxes, and the two through holes are connected to each other when the back surfaces of the two wiring boxes are connected back to back. The wiring box according to any one of claims 1 to 3, wherein the wiring boxes overlap with each other and communicate with each other. 5. A wiring box having a bottom wall and a wiring box installed behind the wall so as to face an opening on the wall surface of the building wall, and a screw for connecting two of the wiring boxes. In the device, a screw hole is provided on the bottom wall of the wiring box so that two of the wiring boxes are aligned back to back, and the screws are aligned in a state where the screw holes are aligned. A wiring box device, characterized in that the wiring boxes are connected to each other by screwing them back to back. 6. Formed on one of the two wiring boxes.
The diameter of the screw hole is smaller than the screw head of the screw and
With a large diameter that is larger than the male screw part of the screw
Use the screw hole formed in the other wiring box as the screw hole.
A small-diameter screw thread formed on the screw
Screw holes and two wiring boxes back to back
Large-diameter screw hole provided in one wiring box in the closed state
And a small-diameter screw hole provided in the other wiring box
And the screw is inserted from the side of the large-diameter screw hole
By screwing it into the screw hole of
Box to be connected back to back.
The wiring box device according to claim 5, wherein: