JPS585570B2 - How to connect cables to electrical wiring box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cable connection method for an electrical wiring box, in which electric wires are inserted and fixed into the electrical wiring box in a method of directly burying the cable in concrete, for example, in indoor wiring of a concrete building.

Traditionally, indoor wiring for concrete buildings used metal pipes,
Alternatively, hard vinyl pipes have been buried in concrete and wiring has been carried out within the pipes.

However, in order to cope with recent labor shortages, sharp rises in labor wages, and price increases in the building industry, it has been desired to save labor and materials in electrical work as well.

Recently, it has become common practice to bury cables directly in concrete.

In this case, when connecting the cable to the electrical wiring box, there is a risk that concrete milk may enter the electrical wiring box through the knockout wire passage hole of the electrical wiring box.

In order to prevent the intrusion of concrete milk, a complicated device is required at the connection part, which has the drawback of requiring a lot of trouble.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a cable connection method for an electrical wiring box that can easily prevent concrete milk from entering the electrical wiring box using a simple device. purpose.

An embodiment of the present invention will be described in detail below with reference to the drawings.

That is, as shown in FIGS. 1a and 1b, the connector device has a connector sleeve made of, for example, hard plastic, in the concave fitting portion 2 of a connector cover 1 made of a flexible material such as rubber or plastic. It is constructed by fitting the convex fitting part 4 of the body 3.

As shown in FIGS. 2a and 2b, the connector cover 1 has a groove-shaped concave fitting part 2 formed along the inner wall of the substantially central part of the cylindrical shape, and one side of the concave fitting part 2. A cable enclosing part 6 having a wire passage hole 5 is integrally formed in a gradually tapered cylindrical shape, and a skirt-like covering part 7 protrudes from the other side of the recessed fitting part 2. Formed in one piece.

Further, as shown in FIGS. 3a, b, and c, the connector cylindrical body 3 has tongue-shaped protrusions 8 and 9 at two locations on the outer surface of the end to be inserted into the knockout hole of the electrical wiring box. These protrusions 8 and 9 are formed by gradually increasing the protrusion length toward the other end.
Paco-shaped slits 10 and 11 are formed around the .

A convex fitting portion 4 is integrally formed on the outer surface of the other end opposite to the end where the projections 8 and 9 are formed along the circumferential surface.

That is, as shown in FIGS. 1a and 1b, the connector cover 1
After fitting the convex fitting part 4 of the connecting fitting cylinder 3 into the concave fitting part 2 of the connecting fitting cover 10, the cable wrapping part 6 having the wiring hole 5 of the connecting fitting cover 10 is assembled as shown in FIGS. 4a and 4b. As shown, the cable 12 is turned over and folded into the concave fitting part 2 and the skirt-like covering part 7, and then, as shown in FIGS. After that, insert the end of the connector cylinder 3 into the knockout hole of the electrical wiring box 13 with the tongue-shaped protrusion 8,
Press and insert while pressing 9.

After this insertion, the tongue-like protrusions 8 and 9 protrude back to their original positions and act as a stopper to prevent the skirt-like covering part 1 from coming off.
is in close contact with the outer wall of the electrical wiring box 13 around the knockout hole.

Thereafter, as shown in FIG.
As shown in FIG.

Thereafter, the cable 12 is fixed by tightening the tip of the protruding cable wrapping part 6 with, for example, tape.

In this case, by adjusting the amount of tension on the cable 12, the amount of the cable 12 inside the electrical wiring box 13 can be adjusted.

As shown in Fig. 5d, leave a folded part inside out at one end of the protruding cable wrapping part 6, and then tighten the tip of the doubled cable wrapping part 6 with tape or the like. It's okay.

Note that it is not necessary to tighten the tip end of the cable wrapping portion 6 with tape or the like after the cable is wired.

Note that the cable may be routed through the inclusion part 6 having the wire passage hole 5 after inserting and attaching the connector cylinder body 3 fitted to the connector cover 1 into the knockout hole of the electrical wiring box. .

Note that the connector cylindrical body is not limited to the configuration of the above embodiment, and may have a convex fitting portion formed on the outer surface of the end, into which the connector cover is inserted and locked into the knockout hole of the electrical wiring box. That's fine.

Further, the connector cover is not limited to being attached via the connector tube which is an auxiliary tool, but may be attached directly to the electrical wiring box.

As described above, according to the present invention, the connector cylinder fitted into the connector cover is inserted into the knock-out hole of the electrical wiring box, and the cable is inserted into the inclusion part having the wire passage hole of the connector cover. Cables can be attached to the electrical wiring box by simply inserting them, making cable installation extremely easy.

Moreover, since the cable is tightly wrapped in the wrapping part having the wire passage hole of the connector cover, and the skirt-like covering part of the connector cover is tightly attached to the outer wall around the knockout hole of the electrical wiring box. , concrete milk can be prevented from entering the electrical wiring box.

Furthermore, by folding back the packaging part with the wire passage hole of the connector cover inward and passing the cable through it,
The amount of cable inserted into the electrical wiring box can be easily adjusted.

In addition, the cable wrapping part must be inserted into the electrical wiring box upside down once, and then the cable should be pulled out and the cable wrapping part should be pulled out of the electrical wiring box. No joints remain and there are no obstructions, so it can be used in a wide range of applications, and any wiring equipment can be easily attached.Furthermore, the flexible joints make it easy to fit in.
There are advantages such as there is no need to make a special cable for round diameter and flat cables, and it can be used for both purposes.

In this case, if it is not necessary, the cable may be connected while being inserted into the box.

[Brief explanation of drawings]

Figures 1a and b are a front view and a side view showing an embodiment of the present invention, Figure 2 ayb is a side view and a sectional view showing an example of a connector cover according to the present invention, and Figures 3a and 3 are b, c A side view, a front view, and a top view showing an example of the connecting device cylinder according to the present invention,
Fig. 4 ayb is a side view and a front view showing an example of use of the connector cover according to the present invention, and Fig. 5 a''e is a sectional view showing an example of use of an embodiment of the present invention. 1.・Connector covering body, 2... concave fitting part, 3...
Connection cylinder body, 4... Convex fitting part, 5... Wiring hole, 6
...Cable wrapping part, 7...Skirt-shaped covering part, 8
, 9...Protrusion, 12...Cable, 13...Electrical wiring box.

Claims (1)

[Claims] 1. Attach a connector cover with a cable wrapping part that has a protruding wiring hole that can be turned over directly to the knockout hole of an electrical wiring box, or by using an auxiliary tool, and install the connector cover inside the connector cover with a protruding wire hole. After the cable was routed through the cable enclosing part, the cable was pulled out to the outside of the electrical wiring box so that part or all of the cable enclosing part was exposed, and the cable was connected to the electrical wiring box. A cable connection method for an electrical wiring box, characterized in that: