JPH09261819A - Pull box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pull box wherein a lid can be fixed without using screws and prevented from falling down. SOLUTION: A lid 1 of a pull box used for connection or branch of wires has an edge part 6 covering the outer wall of a case 3. Protruding parts 7, 8 for engagement are formed on the facing insides of the edge parts 6. At least the protruding part 8 out of the protruding parts 7, 8 is formed of elastic material. Recessed parts 9, 10 for engaging with the protruding parts 7, 8 are formed in the outer periphery of the case 3. By holding the lid 1 with the protruding parts of the lid 1 and the recessed parts of the case 3, the lid is fixed without using screws, and can be prevented from falling down.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pull box used as a connection box or a branch box when connecting or branching wires.

[0002]

2. Description of the Related Art A pull box is used as a connection box or a branch box for connecting outdoor wiring to indoor wiring when the wiring is pulled indoors or for branching indoor wiring.

For example, as shown in FIG. 6, the pull box comprises a plate-shaped lid 1 and a box-shaped case 3 to which the lid 1 is detachably attached in an opening 2.
Is a frame-shaped engaging portion 4 in which the open end is bent inward.
Is formed, and mounting holes 5 having thread grooves are provided at four corners of the engaging portion 4, and holes 5'corresponding to the mounting holes 5 are provided at four corners of the lid 1, and the lid 1 is screwed. It is designed to be attached.

In such a pull box, on the side surface surrounding the periphery of the opening 2 or on the bottom surface facing the opening,
A hole for inserting an electric wire and a screw hole for mounting are appropriately provided, and the appropriately provided screw hole is screwed and attached to a wall surface, a ceiling, or the like of a building, and the electric wire is provided in the attached pull box. For example, outdoor wiring or indoor wiring is introduced into the hole through electric wire piping to internally connect or branch the wiring.

[0005]

However, as described above, this pull box is used for connecting outdoor wiring to indoor wiring or branching indoor wiring from each other. It is often attached to a nearby wall, and when attaching or removing the lid, it was necessary to prevent the lid from falling with one hand while using the screwdriver to remove or attach the screw with the other hand. . Therefore, there is a problem that it is necessary to carry out difficult work at high places.

Further, due to such a situation, the lid or the screw may be accidentally dropped during the work, and the dropped screw may not be recovered, and the lid may be attached without removing the screw. Not only was workability poor, but there was a problem from a safety perspective.

Further, in the case where the lid is attached by screwing, since the thickness of the case is thin and the thread groove can be cut only about two threads, it is difficult to engage the screw when screwing in.
In addition, there is a problem that the strength is weak.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a pull box in which the lid can be easily attached and detached without using screws, and the lid can be prevented from falling.

[0009]

In order to solve the above-mentioned problems, according to the present invention, an insertion hole is provided in a box-shaped case in which a plate-like lid is removably attached to the opening, and the box-shaped case is introduced through the insertion hole. In a pull box for connecting or branching electric wires in a case, it is assumed that the lid has an edge portion along the edge that covers the outer wall of the case, and a protrusion or a recess for engagement is provided inside the edge portion opposite to the edge portion. Is provided so that projections or recesses for engagement can be provided, and recesses or projections that engage with the projections are provided on the outer circumference of the case, and at least one of the projections is formed of an elastic material. By adopting the above structure, the lid can be attached and detached by engaging the protrusion or the recess of the edge portion with the recess or the protrusion of the case.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a pull box according to the present invention.

The pull box comprises a lid 1 and a box-shaped case 3 in which the lid 1 is detachably attached to the opening 2.

As shown in FIG. 2, the lid 1 is formed with an edge portion 6 which covers the outer wall of the case 3 along the periphery thereof, and an engaging protrusion is formed on the inner side of the edge portion 6 facing each other. Part 7,
8 are provided.

In this embodiment, the projecting portion 7 is formed in a semi-cylindrical shape by projecting the edge portion 6 inward as shown in FIGS. There are two locations, one at each end.

Further, the protrusion 8 is formed by cutting out a plate-shaped spring material to form a lever-shaped central portion and forming the tip of the lever into a semi-cylindrical shape. The edge 6 facing each other
It is attached to the central portion of, for example, by welding.

On the other hand, as shown in FIG. 3, the side wall of the case 3 is provided with recesses 9 and 10 for engaging with the projections 7 and 8 formed on the edge 6 of the lid 1.

That is, as shown in FIG. 1, the recesses 9 and 10 are formed in a semi-cylindrical shape, and the recesses 9 are provided at both ends of the side wall of the case. Further, the recess 10 is provided at the center of the side wall opposite to the side wall where the recess 9 is provided, so that it can be fitted to the projections 7 and 8 as shown in FIG.

This embodiment is configured as described above, and in this pull box, for example, a case 3 is provided with a hole for inserting an electric wire and a screw hole for mounting, and the pull box is mounted on a ceiling or the like. When attaching the lid 1 to the case 3 attached in this way, as shown in FIG. 4, when the protrusion 7 of the lid 1 is hung on the recess 9 of the case 3 and pushed up, the protrusion abutting against the outer wall of the case 3 is pushed. Since the portion 8 is a spring material, it bends and fits into the recess 10 as shown in FIG. 5, and can be easily attached.

At this time, since the projection 8 has a semi-cylindrical tip, its curved surface facilitates fitting into the recess 10.

As shown in FIG. 5, the lid 1 thus fitted is held by the elastic pressure of the projection 8, and the lid 1 is formed slightly larger than the case 3 so that it can be easily attached and detached. Even if it does, it can be prevented from falling off in a normal state.

On the other hand, when the lid 1 attached in this manner is removed, when the side a of the lid 1 on which the projection 9 is provided is pulled downward, the projection 8 bends and escapes from the recess 10, and FIG. As shown in FIG. 3, the protrusion 7 is rotated as a fulcrum, the engagement is released, and the protrusion 7 can be easily removed.

At this time, the tip of the protrusion 8 is formed in a semi-cylindrical shape so that the protrusion 8 can be easily escaped from the recess 10.

Thus, in this pull box, the lid 1
The edge portion 6 for engagement is formed on the edge portion 6, the protrusion portions 7 and 8 are provided on the edge portion 6, and the recess portions 9 and 10 that fit with the protrusion portions 7 and 8 are provided on the case 2. 7,8 and recesses 9,10
The lid 1 can be attached by pressing the lid 1 against the case 3 together, and the lid 1 can be removed by pulling down the lid 1.

Therefore, work at a high place can be easily performed, and since the screw is not used, the lid and the screw are not accidentally dropped during the work. Also, with the screws missing,
Since the lid is not attached, workability is good,
Moreover, safety can be improved.

In the above embodiment, one of the protrusions of the lid is made of an elastic material, but the present invention is not limited to this, and both of the protrusions may be made of an elastic material.

In the above embodiment, the protrusion is provided on the lid side and the recess is provided on the case side. However, the recess may be provided on the lid side and the protrusion may be provided on the case side. Since they may be the same as those in the above-described embodiment, the description thereof will be omitted here.

[0027]

According to the present invention, the lid is formed as described above, and the edge portion is formed along the edge so as to cover the outer wall of the case, and the engaging projections are formed on the inner sides of the edge portion facing each other. Provided,
By forming at least one of the protrusions with an elastic material and providing a recess that engages with the protrusions on the outer circumference of the case, the lid can be attached without using screws, and the lid can be dropped. A pull box that can be prevented can be provided.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment.

FIG. 2 is a front view of the lid of the embodiment.

FIG. 3 is a front view of the case of the embodiment.

FIG. 4 is an operation explanatory view for explaining the embodiment.

FIG. 5 is an operation explanatory view for explaining the embodiment.

FIG. 6 is an exploded perspective view of a conventional example.

[Explanation of symbols]

 1 Lid 2 Opening 3 Case 4 Engagement Part 6 Edge 7 Protrusion 8 Protrusion (Spring Side) 9 Recess 10 Recess (Spring Side)

Claims (1)

[Claims] 1. A pull box in which a box-shaped case in which a plate-like lid is detachably attached to an opening is provided with an insertion hole, and electric wires introduced from the insertion hole are connected or branched in the case, Is formed along the edge to cover the outer wall of the case, and the protrusions or recesses for engagement are provided on the inner sides of the edges facing each other, and the recesses or protrusions that engage with these protrusions are formed. A pull box provided on the outer periphery of the case and having at least one of its protrusions made of an elastic material.