JP2003102115A - Wiring box and joint frame for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiring box of which a joint frame body is so fitted to a box body as not to be easily detached, as well as a joint frame for the wiring box. SOLUTION: A wiring box 11 comprises a box body 14, which is box-like and comprises a bottom, with an opening on the front surface. Each of a pair of side walls 13 facing each other has a pair of locking holes 17. A joint frame 21 for wiring box is provided with a joint frame body 23 which is a rectangular frame in top view, and a pair of locking tabs 24 protrude outward from each of facing peripheral walls 22. Related to the wiring box 11 fitted to a post 27, the locking tab 24 of the joint frame body 23 locks with the locking hole 17, so that the joint frame 21 for wiring box is fitted hard to the wiring box 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring box used for mounting a wiring device on a wall surface in a building, and a wiring box joint frame mounted on the opening side of the wiring box.

[0002]

2. Description of the Related Art Conventionally, in order to attach a wiring device to a wall surface in a building, a wiring box is installed at a position on the back side of the wall before standing of a wall material for forming a wall. The wiring box made of a synthetic resin material has a box body formed in a rectangular box shape with a bottom having an opening on the front surface by a square plate-shaped bottom wall and side walls standing on the four side peripheral edges of the bottom wall. I have it. Mounting portions for mounting wiring devices are formed on the inner surfaces of a pair of side walls of the box body that face each other, and screw holes into which screws can be screwed are formed in each mounting portion. The wiring box is attached and fixed to a pillar that is erected in the building, with one side contacting the pillar.

When a gap is formed between the end face of the wiring box on the opening side and the back face of the standing wall material when the wiring box is attached to the pillar, dust or the like is left inside the wiring box through the gap. To prevent problems entering
A wiring box joint frame (hereinafter simply referred to as joint frame) is attached to the opening side of the wiring box. The joint frame made of synthetic resin material has a rectangular frame shape, and is provided with a joint frame body having a certain depth, and the shape of the opening of the joint frame body substantially corresponds to the shape of the opening of the box body. Has been formed. Further, a pair of abutting pieces projecting outward of the joint frame main body are formed at opposite positions of one opening side end surface of the joint frame main body.

In order to mount a wiring device on a wall surface using the above wiring box and joint frame, first, after mounting the wiring box on a pillar, a wall material is erected on the opening side of the wiring box. Then, a wall through hole having an inner peripheral shape corresponding to the outer peripheral shape on the opening side of the wiring box is formed in the wall material.

If a gap is formed between the opening-side end surface of the wiring box and the back surface of the wall material, the depth corresponding to the distance between the opening-side end surface of the wiring box and the back surface of the wall material. The joint frame having the above is passed through the wall through hole, and the contact piece is further inserted into the wiring box attached to the column.

The joint frame body is attached to the opening side of the box body by bringing the outer surfaces of the contact pieces into contact with the inner surfaces of the pair of side walls of the box body which face each other.
Then, the screw inserted into the wiring device holding frame holding the wiring device from the front side of the wall material is screwed into the screw hole. As a result, the joint frame is sandwiched between the wiring device holding frame and the wiring box fixed to the pillar, and the joint frame fills the gap between the back surface of the wall material and the opening-side end surface of the wiring box.

[0007]

However, in the above-mentioned conventional wiring box and joint frame, the joint frame body is attached to the box body by the contact piece contacting the inner surface of the side wall of the box body, and the joint to the wiring box is connected. The mounting condition of the frame was very unstable. Therefore, before the joint frame is sandwiched between the wiring equipment holding frame and the wiring box, for example, the force to pull out the joint frame to the front side of the wall material acts on the joint frame and the joint frame comes off from the wiring box. There was a problem that there is a risk of it.

The present invention has been made by paying attention to the problems existing in the prior art. It is an object of the invention to provide a wiring box and a wiring box joint frame that can be attached to the box body so that the joint frame body cannot be easily removed.

[0009]

In order to solve the above problems, the invention according to claim 1 is provided with a box-shaped box main body having an opening, and the box main body has a frame-shaped joint frame main body. A wiring box in which an open end of the box body is extended outwardly by mounting a joint box for a wiring box including a wiring box, the locking means is formed on the box body, and the wiring box is formed on the box body. The gist is that the connecting frame main body is attached to the box main body by the locking of the locking means and the locking means formed on the joint frame main body.

According to a second aspect of the present invention, in the wiring box according to the first aspect, the locking means of the box body is locked by a locking claw serving as a locking means formed on the joint frame body. The gist is that it is a locking hole that does.

According to a third aspect of the present invention, an opening of the box body is provided by including a joint frame body having a frame shape, and attaching the joint frame body to a wiring box having a box body having a box shape having an opening. A joint box for a wiring box, the end of which extends outwardly, wherein a locking means is formed on the joint frame body, and the locking means formed on the joint frame body and the lock formed on the box body. The gist is that the joint frame main body is attached to the box main body by locking with the means.

According to a fourth aspect of the present invention, in the joint frame for a wiring box according to the third aspect, another joint frame body is attached to the joint frame body so that another joint frame body can be attached to the joint frame body. The gist is that a locking portion that locks with the locking means is formed.

According to a fifth aspect of the present invention, in the joint frame for the wiring box according to the third or fourth aspect, the retaining means of the joint frame body is a retaining means formed on the box body. The gist is that it is a locking claw that locks in the locking hole.

According to a sixth aspect of the present invention, in the joint frame for a wiring box according to any one of the third to fifth aspects, a wiring device is attached to the box body by a screw. A screw hole for mounting is formed,
The gist is that a guide boss portion for guiding the mounting screw to the screw hole is formed on the joint frame body.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a wiring box and a wiring box joint frame embodying the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a wiring box 11 used for mounting a wiring device (not shown) on a wall surface inside a building is a bottom wall 12 formed of a synthetic resin material in the shape of an elongated rectangular plate. And a side wall 13 standing upright on the four side edges of the bottom wall 12 and a box body 14 formed in the shape of a rectangular box with a bottom and having an opening at the front. In FIG. 1, the side wall 13 (left side wall 1) located on the left side of the box body 14
In 3), an abutting portion 15 having a constant thickness is provided so as to project outward. In addition, the box body 14 has the contact portion 15
Further, fixing holes 15a are formed at three positions penetrating the left side wall 13 and through which fixing screws 16 can penetrate.

In FIG. 1, a pair of wiring through-holes 13a for allowing a cable (not shown) to be wired in the box body 14 are formed in a pair of upper and lower side walls 13 of the box body 14 which face each other. Each of the wiring through holes 13a is closed by a knock portion 13b. Further, in the upper and lower side walls 13, locking holes 17 as locking means are formed at both sides of the box body 14 on the opening side so as to penetrate the side walls 13.

Further, as shown in FIG. 3, mounting portions 18 projecting toward the opening side of the box body 14 are formed at the central portions of the bottom wall 12 on the side of the upper and lower side walls 13 respectively. A screw hole 20 is formed on an end surface of each mounting portion 18 so that a mounting screw 19 for mounting the wiring device 30 on the box body 14 can be screwed. Then, as shown in FIG. 2, a wiring box joint frame 21 for extending the open end of the box body 14 to the outside is formed in the wiring box 11 having the above-described structure so as to be attachable.

Next, the joint frame 21 for the wiring box will be described. As shown in FIG. 1, a wiring box joint frame 21 (hereinafter, simply referred to as joint frame 21) made of a synthetic resin material includes a joint frame main body 23 in the shape of a plane elongated rectangular frame. The length in the width direction of the peripheral wall 22 of the joint frame main body 23, that is, the depth of the joint frame 21 is formed to be constant.

In the peripheral walls 22 facing each other in the vertical direction of the joint frame main body 23 in FIG. 1, locking claws 24 as locking means are respectively outwardly provided on both sides of one opening edge of the joint frame main body 23. It is projected. As shown in FIG. 2, each locking claw 2
Reference numeral 4 is formed so as not to project outward from the outer surface of the peripheral wall 22 on which the locking claw 24 is formed. Each locking claw 24
When the joint frame main body 23 is attached to the opening side end surface of the box main body 14, it is formed at a position to be locked in the locking hole 17.

As shown in FIG. 1, in the peripheral walls 22 facing each other in the vertical direction, locking recesses 22a as locking parts are provided on both sides of the joint frame body 23 on the other opening side.
It is formed penetrating 2. Then, as shown in FIG. 2, another joint frame main body 2 is inserted into the locking recess 22a of the joint frame main body 23.
It is formed so that the joint frames 21 can be attached to each other by locking the locking claws 24 of No. 3.

In FIG. 1, guide boss portions 26 projecting toward the inner center of the joint frame main body 23 are formed in the central portions of the inner surfaces of the peripheral walls 22 facing each other in the vertical direction. Each guide boss portion 26 has the same guide boss portion 2
6, a through hole 26a is formed, and the mounting screw 1
9 is formed so that it can be inserted.

As shown in FIG. 3, with the joint frame 21 attached to the wiring box 11 and the wiring box device is formed, the through hole 26a is located on a straight line passing through the center point of the screw hole 20. ing. The inner center side inner surface of the joint frame body 23 of each through hole 26a and the inner center side inner surface of the box body 14 of the screw hole 20 corresponding to each other are formed so as to be located on the same straight line. Then, the mounting screw 19 inserted into the through hole 26a can be guided so as to be inserted into the screw hole 20.

Now, the operation of the wiring box 11 and the joint frame 21 having the above construction will be described. First, as shown in FIG. 1, the outer surface of the abutment portion 15 is brought into contact with the outer surface of the pillar 27 that is erected in the building, and the fixing screw 16 is fixed to the pillar 27 from each fixing hole 15a. 11 is attached and fixed to the pillar 27. Next, as shown in FIG. 2, the cable 29 is inserted into the wiring through hole 13a that is not closed by the knock portion 13b, and the cable 29 is wired inside the box body 14.

Next, a wall member 28 is erected on the opening side of the wiring box 11, and thereafter, a wall through hole having an inner peripheral shape substantially the same as the outer peripheral shape of the box body 14 is provided at a position corresponding to the opening of the wiring box 11. 28a is formed. At this time,
It is assumed that a gap is formed between the back surface of the wall material 28 and the opening-side end surface of the box body 14. In this case, the distance between the surface of the wall member 28 and the end surface on the opening side of the box body 14,
The number of joint frames 21 used is appropriately changed so that the joint frames 21 attached to the box body 14 have the same depth. In this embodiment, two joint frames 21 are used.

Subsequently, the locking claws 24 of the splicing frame body 23 of another splicing frame 21 are locked in the locking recesses 22a of the splicing frame body 23 of the splicing frame 21. Then, the two joint frames 21 are attached in a state where the entire circumference of the one opening side end surface of the other joint frame main body 23 and the entire circumference of the other opening side end surface of the joint frame main body 23 are in contact with each other. At this time, since the locking claws 24 of the other joint frame bodies 23 are respectively locked in the upper and lower engaging recesses 22a of the joint frame body 23, the other joint frame bodies 23 are stably attached to the joint frame body 23. Can be installed in the state

Next, the joint frame 21 of the two bodies is passed through the wall through hole 28a. At this time, since the locking claws 24 do not project outward from the outer surface of the peripheral wall 22, the locking claws 24 have the wall through holes 28a.
Less likely to get caught on the inner surface. Further, the locking claws 24 of the joint frame main body 23 are inserted into the box main body 14, and each locking claw 2
4 are locked in the corresponding locking holes 17.

Then, the joint frame 21 is attached to the wiring box 11 in a state in which the entire circumference of the one end face on the opening side of the joint frame body 23 is in contact with the entire perimeter of the end face on the opening side of the box body 14. A wiring box device including the box 11 and the joint frame 21 is formed. In the mounted state, the locking claws 24 of the joint frame body 23 are respectively locked in the upper and lower locking holes 17 of the box body 14 facing each other, so that the joint frame body 23 is mounted on the box body 14 in a stable state. To be At the same time, the box frame 14 is attached by the joint frame 21.
The open end of is extended outwardly, that is, toward the wall member 28 side.

Next, as shown in FIG. 3, the wiring box 1
In order to connect the wiring device 30 to the cable 29 that has been pulled inside 1, the cable 29 is pulled out from the inside of the box body 14 to the front side of the wall member 28. At this time, the cable 29 contacts the guide boss portion 26 and the like, and a force for moving the joint frames 21 to the front side of the wall member 28 acts on the joint frames 21.

At this time, the joint frame 21 is attached and fixed to the wiring box 11 by the engagement between the engagement claw 24 and the engagement hole 17.
The other joint frame 21 is attached and fixed to the joint frame 21 that is attached and fixed to the wiring box 11 by the engagement between the engagement claw 24 and the engagement recess 22a. Therefore, the problem that the two joint frames 21 are detached from the wiring box 11 by the force is prevented.

Then, the wiring device 30 is held by the wiring device holding frame 31, and the mounting screw 19 is inserted from the wiring device holding frame 31 into the through hole 26a of the guide boss portion 26. At this time, the inner center side inner surface of the joint frame body 23 of each through hole 26a and the inner center side inner surface of the corresponding box body 14 of the screw hole 20 are located on the same straight line. for that reason,
When the mounting screw 19 is inserted so as to contact the inner center side inner surface of the joint frame body 23 of each through hole 26a, the mounting screw 19 contacts the inner center side inner surface of the box body 14 of the corresponding screw hole 20, It is guided so as to be inserted into the screw hole 20 as it is.

When the pair of upper and lower mounting screws 19 are screwed into the screw holes 20, respectively, the wiring device holding frame 31 comes into contact with the surface of the wall member 28 and is attached to the wiring box 11 via the wall member 28. At the same time, the other opening-side end surface of the other joint frame main body 23 contacts the back surface of the wiring device holding frame 31, and the wiring device holding frame 31 and the wiring box 11 sandwich the two joint frames 21. As a result, the gap between the opening side of the wiring box 11 and the wall member 28 is filled with the joint frame 21, and dust and the like are prevented from entering the wiring box 11. The wiring device 30 is attached to the wiring box 11, and the wiring device 30 is attached to the wall member 28.

According to the wiring box 11 and the joint frame 21 of the above embodiment, the following features can be obtained. (1) By locking the locking claws 24 of the joint frame body 23 to the locking holes 17 of the box body 14, the joint frame 21 can be attached to the wiring box 11 so as not to easily come off. Therefore, the wiring device holding frame 31 and the wiring box 11
Before the joint frame 21 is sandwiched between the joint frame 21 and the wall member 2
It is possible to prevent the joint frame 21 from coming off from the wiring box 11 even if a force pulling it to the front side of 8 acts.

Therefore, the joint frame 21 detached from the wiring box 11 is reattached to the wiring box 11, or the joint frame 21 detached from the wiring box 11 falls to the back side of the wall material 28 and picks up the joint frame 21. Therefore, the work of attaching the wiring device 30 to the wiring box 11 can be performed quickly.

(2) A pair of locking holes 17 are formed on the pair of side walls 13 of the box body 14 which face each other.
A pair of locking claws 24 are formed on the peripheral walls 22 of the joint frame body 23 facing each other. Therefore, the locking hole 17 and the locking claw 24 can be locked at four positions, and the joint frame 21 can be firmly attached to the wiring box 11.

(3) Locking points between the locking holes 17 and the locking claws 24 are formed on the pair of side walls 13 of the box body 14 which face each other. Therefore, the joint frame main body 23 can be stably attached to the box main body 14.

(4) The locking claw 24 is formed so as not to project outward from the outer surface of the peripheral wall 22. Therefore, when the joint frame 21 is passed through the wall through hole 28a, the locking claw 24
Of the joint frame 21 by making it difficult to get caught on the inner surface of the wall through hole 28a.
It is possible to quickly perform the work for attaching the wiring box to the wiring box 11.

(5) The locking claw 24 is locked in the locking hole 17 and the joint frame 21 is attached to the wiring box 11. Therefore, the joint frame 21 can be attached to the wiring box 11 with a simpler configuration than when the joint frame 21 is attached to the wiring box 11 by using a member different from the wiring box 11.

(6) With the joint frame 21 attached to the wiring box 11, the attachment screw 19 is inserted into the through hole 26a.
The guide boss 26, the mounting screw 19
Can be guided so as to be inserted into the screw hole 20. Therefore, the work of screwing the mounting screw 19 into the screw hole 20 can be performed easily and promptly, and the wiring device holding frame 3
It is possible to easily and quickly attach the No. 1 to the wiring box 11.

(7) The joint frames 21 can be attached to each other by retaining the retaining claws 24 of the other joint frame main body 23 in the retaining recesses 22a. Therefore, a plurality of joint frames 21 can be attached to the wiring box 11 corresponding to the distance between the back surface of the wall material 28 and the opening-side end surface of the wiring box 11, and the back surface of the wall material 28 and the opening of the wiring box 11 can be connected. The joint frame 21 can surely fill the gap between the side end surface.

The above embodiment may be modified as follows.・ The box body 14 is attached to the side wall 13 of the box body 14.
Locking claw 2 as locking means protruding outward from the opening end of the
4 is formed. Then, the locking hole 17 as a locking means formed in the joint frame body 23 is provided with the locking claw 2 of the box body 14.
The connection frame 21 may be attached to the wiring box 11 by locking it to the wiring box 11. Further, a locking claw 24 may be formed as a locking portion on the joint frame main body 23, and the locking claw 24 may be locked to the locking hole 17 of another joint frame main body 23 to attach the joint frames 21 to each other. .

The tip of the locking claw 24 may project outward from the outer surface of the peripheral wall 22. In FIG. 1, a pair of upper and lower side walls 13 and a pair of left and right side walls 13 of the box main body 14 which face each other.
The locking holes 17 are formed at one or a plurality of points respectively,
Locking pawls 24 are formed at one or a plurality of positions on the peripheral wall 22 facing the upper and lower sides of the joint frame body 23 and the peripheral wall 22 facing the left and right sides respectively, and all the side walls 13 of the box body 14 are
The locking claw 24 is locked to the wiring box 11 to connect the joint frame 21 to the wiring box 11.
May be attached.

In FIG. 1, the locking holes 17 in the upper and lower side walls 13 of the box body 14 are omitted, and the locking holes 17 are formed in the pair of left and right side walls 13 facing each other. Further, the locking claws 24 of the peripheral walls 22 facing each other in the vertical direction of the joint frame body 23 may be omitted, and the locking claws 24 may be formed in the peripheral walls 22 facing each other in the left and right directions.

In FIG. 1, one locking hole 1 is provided in each of upper and lower or left and right side walls 13 of the box body 14 which face each other.
7 may be formed, and the locking claws 24 may be formed one by one on the peripheral walls 22 that face each other vertically or horizontally of the joint frame body 23.

A locking claw 24 is formed on the outer surface of the peripheral wall 22 that vertically and horizontally opposes the joint frame body 23, and the locking hole 17 that is formed in the side walls 13 that vertically and horizontally oppose each other of the box body 14. The connecting frame 21 may be attached to the wiring box 11 by locking the locking claw 24 from the outside of the side wall 13.

In FIG. 1, the upper side wall 13 and the left side wall 13 or the right side wall 13 or the lower side wall 1 of the box body 14
3, the locking hole 17 may be formed in the left side wall 13 or the right side wall 13, and the locking claw 24 may be formed in the joint frame body 23 at a position corresponding to the locking hole 17.

The guide boss portion 2 in the joint frame body 23
6 may be omitted. Further, the guide boss portion 26 and the through hole 26a may be formed so that the mounting screw 19 inserted into the through hole 26a is not guided by the guide boss portion 26 into the screw hole 20.

Locking recess 2 formed in the joint frame main body 23
2a may be omitted. In the embodiment, the wiring box 11 has two joint frames 21.
I installed the wiring box 11 as shown in FIG.
An integral joint frame 21 may be attached to the three joint frames 21 so that the distance between the surface of the wall member 28 and the opening-side end surface of the box body 14 and the joint frame 21 have the same depth. The above may be used.

In the embodiment, the joint frame 21 is used to fill the gap formed between the opening-side end surface of the box body 14 and the back surface of the wall material 28. However, the wiring box 11 is used in a mud wall or in concrete. When installed in the wall, the joint frame 21 may be used when a gap is formed between the front surface of the formed mud wall or concrete wall and the opening side end surface of the box body 14.

In the embodiment, the two joint frames 21 are attached in advance to the wiring box 11, but the joint frames 21 may be attached to the wiring box 11 one by one. Next, the technical ideas that can be understood from the above-described embodiments and other examples will be added below along with their effects.

(1) The joint frame for a wiring box according to claim 5, wherein the locking claw is formed inside the outer surface of the peripheral wall of the joint frame body. With this structure, when the joint frame main body is passed through the wall through hole formed in the wall material erected on the front surface of the wiring box, the locking claws are less likely to be caught on the inner surface of the wall through hole, and the joint frame main body is prevented. The work to attach the to the box body can be performed quickly.

(2) The wiring box according to claim 1 or 2, wherein the locking means are formed at least at opposite positions of the box body. With this configuration, the joint frame body can be attached to the box body in a stable state so as not to come off easily.

(3) A wiring box having a box-shaped box body having an opening, and a frame-shaped joint frame body attached to the box body so as to extend the opening end of the box body outward. A wiring box joint frame provided, wherein a locking means is formed between the box main body and the joint frame main body, and the connecting frame main body is attached to the box main body by the locking means. Wiring box device. With such a configuration, the wiring box joint frame can be attached to the wiring box so as not to easily come off. (4) The locking means includes a locking hole formed in the side wall of the box body and a joint frame. The wiring box device according to the above-mentioned technical idea (3), characterized in that the wiring box device is formed of a locking claw that locks in the locking hole formed in the main body. With this structure, it is possible to easily form a structure that prevents the joint frame main body from easily coming off the box main body.

[0054]

As described above in detail, according to the invention described in claim 1, the joint frame main body can be attached to the box main body so as not to easily come off.

According to the invention of claim 2, claim 1
In addition to the effect of the invention described in (1), the joint frame body can be attached to the box body by the engagement hole formed in the box body and the engagement claw formed in the joint frame body. Therefore, the joint frame main body can be attached to the box main body with a simpler structure as compared with the case where both members are attached using a member different from the box main body.

According to the third aspect of the present invention, the joint frame body can be attached to the box body so as not to easily come off. According to the invention as set forth in claim 4, in addition to the effect of the invention as set forth in claim 3, the number of joint frame bodies attached to the box body is changed corresponding to the length of extension of the opening end of the box body. can do.

According to the invention of claim 5, claim 3
Alternatively, in addition to the effect of the invention described in claim 4, the joint frame main body can be attached to the box main body by the locking hole formed in the box main body and the locking claw formed in the joint frame main body. Therefore, the joint frame main body can be attached to the box main body with a simpler structure than in the case where both members are attached using a member different from the joint frame main body.

According to the invention described in claim 6, claim 3
In addition to the effect according to any one of claims 5 to 5, the work of screwing the mounting screw into the screw hole can be easily and promptly performed, and the work of attaching the wiring device to the box body can be easily and promptly performed. be able to.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a wiring box and a joint frame for the wiring box.

FIG. 2 is a side cross-sectional view showing a mounting state of two wiring box joint frames to a wiring box.

FIG. 3 is a side sectional view showing a state in which a wiring device is attached to the wiring box.

FIG. 4 is a side sectional view showing a mounting state of an integral wiring box joint frame to the wiring box.

[Explanation of symbols]

11 ... Wiring box, 14 ... Box body, 17 ... Locking hole as locking means, 19 ... Mounting screw, 20 ... Screw hole,
Reference numeral 21 ... Wiring box joint frame, 22a ... Locking recess as locking portion, 23 ... Joint frame main body, 24 ... Locking claw as locking means, 26 ... Guide boss portion, 30 ... Wiring device.

Continued front page    F-term (reference) 4E360 AB02 AB12 AB17 AB20 BA03                       BA08 BC05 EA05 EA18 EB02                       EC05 ED02 ED12 ED13 ED17                       ED27 FA02 FA08 GA06 GB93                       GB94                 5G052 AA12 HC08                 5G357 CA06 CB04 CC01 CC05 CD06                       CE02 CF05                 5G361 AA01 AB02 AC02 AC08 AE01

Claims (6)

[Claims] 1. A box-shaped box body having an opening, wherein a wiring box joint frame having a frame-shaped joint frame body is attached to the box body so that the opening end of the box body is outward. A wiring box extending to the box body, wherein locking means is formed on the box body, and the box is formed by locking the locking means formed on the box body and the locking means formed on the joint frame body. The wiring box is characterized in that the joint frame main body is attached to the main body. 2. The locking means of the box body is a locking hole into which a locking claw serving as a locking means formed in the joint frame body is locked. Wiring box. 3. An open end of the box body is extended outward by mounting the joint frame body in the form of a frame to a wiring box equipped with the box body in the form of a box having an opening. A connecting frame for a wiring box, wherein a locking means is formed on the connecting frame body, and the connecting means is connected by the locking means formed on the connecting frame body and the box body. A joint box for a wiring box, characterized in that the frame body is formed so as to be attached to the box body. 4. An engagement portion for engaging with engagement means of another joint frame main body is formed in the joint frame main body so that another joint frame main body can be attached to the joint frame main body. The joint frame for the wiring box according to Item 3. 5. The locking means of the joint frame main body is a locking claw that locks in a locking hole as a locking means formed in the box main body. Connection box for wiring box described in. 6. The box body is formed with a screw hole for attaching a wiring device to the box body with a mounting screw, and a guide boss portion for guiding the mounting screw to the screw hole is formed in the joint frame body. The wiring box joint frame according to any one of claims 3 to 5, characterized in that.