JPH04126381A - Joint box for electrical wiring - Google Patents

Abstract

PURPOSE:To increase the substantial capacity for connection using a compact structure by providing on each of the side walls of a joint box base a wire- passing notched portion open to an open face, and also providing the joint box base and a joint box cover with respective engagement portions to be engaged with each other. CONSTITUTION:A wire-passing notched portion 14 open to an open face 13 is provided on each of the four side walls of a joint box base 11 and an engagement claw portion 16 which can be engaged in an engagement claw portion 15 is provided in each of four positions on the outer periphery of a joint box cover 12. Thereby only a connecting portion is accommodated in the inner space of a joint box and the substantial capacity for connection can be enlarged by a compact structure which does not require a space for wiring.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a joint box for electrical wiring.

[Conventional technology] Conventionally, joint boxes attached to ceilings, etc.
As described in Japanese Utility Model Application Publication No. 59-41016, the one shown in FIG. 9 is used. This joint box 1 is composed of a joint box base 2 which is a bottomed box-like body having an open surface, and a joint box cover 3 which closes the open surface of the joint box base 2.

In the joint box 1, the electrical wiring 4 is inserted through the knockout hole 2A of the joint box base 2 and connected with the connector 5.

Then, the joint box base 2 and joint box cover 3 are fixed with springs 6.

[Problem to be solved by the invention] However, the prior art has the following problems (1) and (2).

■It will be difficult to connect the electrical wiring 4 unless it is sufficiently drawn into the joint box base 2 through the knockout hole 2A. For this reason, after wiring, the extra wiring length L (see Figure 9)
must also be accommodated, which increases the extra volume required for the wiring pool. Therefore, the actual wiring capacity is small.

■Since the joint box base 2 and the joint box cover 3 are screwed together, it takes a lot of man-hours during assembly and maintenance. It is particularly difficult to work in narrow spaces such as behind the ceiling.

It is an object of the present invention to have a compact structure, which has a large practical capacity for wiring connections, and which allows a joint box base and a joint box cover to be easily engaged with one touch.

[Means for Solving the Problems] The present invention provides a joint box base for electrical wiring, which is composed of a joint box base that is a bottomed box-like body having an open surface, and a joint box cover that can close the open surface of the joint box base. In the joint box, the joint box base is provided with a wire passage notch in the side wall that opens to the open surface, and the joint box base and the joint box cover are provided with engaging parts for engaging each other. It is.

[Function] According to the present invention, one of the joint box base and the joint box cover is attached to a ceiling joist, etc., and the front surface of the joint box base or the joint box cover attached to the ceiling joist etc. After connecting the electrical wiring around the periphery and placing this connection part on the joint box base or joint box cover, the joint box base and joint box cover can be engaged with one touch via their engaging parts. wear and integrate.

At this time, the electrical wiring is routed from the wiring notch provided on the side wall of the joint box base to the space inside the joint box covered by the joint box base and joint box cover. becomes. As a result, the connection portion within the joint box is isolated from, for example, a heat insulating material filled in the attic, etc., and it is possible to prevent electric leakage and fire from occurring.

Therefore, according to the present invention, there are the following effects (1) and (2).

■Electrical wiring is connected around the front of the joint box base or joint box cover, and after being placed on the joint box base or joint box cover, it is integrated with the joint box base. It is accommodated in the joint box interior space formed by the joint box cover. As a result, it is sufficient to accommodate only the wiring part in the space inside the joint box.
No need for wiring. In other words, the compact structure allows for a substantial wiring capacity.

■The joint box base and joint box cover can be easily integrated by touching their engaging parts.

[Example] Figures 1 (A) to (C) are perspective views showing a first example of the joint box of the present invention, and Figures 2 (A) to (C) are perspective views showing the first example of the joint box of the present invention. 3 is a plan view showing the joint box base, 4 is a front view of 3, 5 is a side view of 3, and 6 is a joint box. A plan view showing the cover, FIG.
8 is a side view of FIG. 6, and FIG. 9 is a schematic diagram showing a conventional example.

The joint box 10 of the present invention includes a joint box base 11 as shown in FIGS. 3 to 5, and a joint box base 11 as shown in FIGS.
It is composed of a joint box cover 12 as shown in FIG.

The joint box base 11 is a bottomed box-like body having an open surface 13. Further, the joint box cover 12 can close the open surface 13 of the joint box base 11.

Here, the joint box base 11 is provided with a wire passage notch 14 that opens into the open surface 13 on each of the four side walls.

In addition, the joint box base 11 has a pair of opposite side walls on both sides of the wiring notch 14.
An engagement window portion 15 is provided. The joint box cover 12 is provided with engaging claw portions 16 at each of four positions on the outer circumferential side, which can be engaged with the engaging window portion 15 of the joint box base 11.

The joint box base 11 is provided with an attachment hole 17 for attachment to a ceiling joist or the like using wood pegs 21. In addition, the joint box cover 12 also has wood screws 22.
It is provided with an attachment hole 18 for attachment to a ceiling joist or the like. The joint box base 11 and the joint box cover 12 are used by attaching either one to a ceiling joist or the like.

Furthermore, the joint box cover 12 is provided with corner guides 19 protruding from each of four positions on the outer circumferential side to fit and guide a part of the inner wall corner of the joint box base 11. A wall guide 20 is provided protrudingly to guide the fitting.

Hereinafter, a first embodiment and a second embodiment of the present invention will be described.

(First embodiment) (See Figure 1) (1) Connect the joint box base 11 to the ceiling joist 3o.
(See Figure 1 (A)).

(2) Connect the electrical wiring 31 around the front surface of the joint box base 11 using a connector 32, and place the connector 32 on the joint box base 11 (see FIG. 1 CB).

(3) Connect the joint box base 11 and the joint box cover 12 to their engagement window portion 15 and engagement claw portion 1.
Attach with one touch through 6 and layer it (Fig. 1 (
]reference).

(Second Embodiment) (See Figure 2) (1) Attach the joint box cover 12 to the ceiling joist 30 (See Figure 2 (A)).

(2) Connect the electrical wiring 31 around the front surface of the joint box cover 12 using a connector 32, and place the connector 32 on the joint box cover 12 (see FIG. 2(B)).

(3) Connect the joint box base] 1 and the joint box cover 12 to their engagement window portion 15 and engagement claw portion 1.
Attach with one touch through 6 and layer it (Fig. 2 (
See C).

According to the first and second embodiments described above, the electrical wiring 31 is connected to the joint box base 1 from the wiring notch 14 provided on the side wall of the joint box base 11.
1 and the joint box cover 12 cover the space inside the joint box. Thereby, the connector 32 in the joint box 10 is isolated from, for example, a heat insulating material filled in the ceiling, etc., and it is possible to prevent electric leakage and fire from occurring.

Therefore, according to the above embodiment, the following effects (1) and (2) are achieved.

■The electrical wiring 31 is connected around the front surface of the joint box base 11 or the joint box cover 12, and after being placed on the joint box base 11 or the joint box cover 12, it is layered. The joint box base 11 and the joint box cover 12 form a space within the joint box. As a result, it is sufficient to accommodate three connectors in the space within the joint box, and no wiring pool is required, that is, the compact structure increases the substantial wiring capacity.

[2] The joint box base 1] and the joint box cover 12 can be easily integrated with a single touch by engaging the engaging window portion 15 and the engaging claw portion 16.

[Effects of the Invention] As described above, according to the present invention, the compact structure allows a substantial wiring capacity to be accommodated, and the joint box base and joint box cover can be easily connected with one touch.

[Brief explanation of drawings]

FIGS. 1(A) to (C) are perspective views showing a first embodiment of the joint box of the present invention, and FIGS. 2(A) to (C) are perspective views showing a second embodiment of the joint box of the present invention. Figure 3 is a plan view showing the joint box base, Figure 4 is a front view of Figure 3, Figure 5 is a side view of Figure 3, and Figure 6 is a plane view of the joint box cover. Figure 7 is the 6th
8 is a side view of FIG. 6, and FIG. 9 is a schematic diagram showing a conventional example. 0...Joint box, 1...Joint box base, 2...Joint box cover 3...Open surface, 4...Notch for wiring, 5...Engagement window , 6... Engaging claw portion, 1... Electrical wiring, 2... Connector.

Claims (1)

[Claims] (1) In a joint box for electrical wiring, which consists of a joint box base that is a bottomed box-like body with an open surface and a joint box cover that can close the open surface of the joint box base, the joint box base has an opening on the open surface. A joint box for electrical wiring, characterized in that the side wall is provided with a notch for wire passage, and the joint box base and the joint box cover are provided with an engaging part for engaging with each other.