JPS598407Y2 - Box for buried wiring - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a box for buried wiring buried in a wall such as concrete to prevent concrete debris from entering the box.

2. Description of the Related Art Hitherto, buried wiring boxes have been provided which are buried in concrete or other room walls for electrical wiring such as switches.

This box generally has an opening on one side as shown in FIG. 1, and a cover is attached to the opening 1 of the box with screws 2 after the box is buried.

When burying this box, the opening end surface 4 of the box is placed against the curtain plate 3 as shown in Fig. 2. For this reason, the screws 2 are attached to the box in advance and are applied to the curtain plate 3 as shown in the figure.

Since the screws 2 are attached in advance and are placed in contact with the curtain plate 3, conventionally, as shown in FIG. The mounting seat 5 is provided lower than the opening end surface 4 by a dimension h.

However, this requires a notch 6 with a size h, and unhardened soft concrete 7 often enters the box through this notch 6.

If the box enters, concrete particles accumulate in the box and must be lifted out one by one, and the concrete particles also adhere to the seat 5 and screw hole 8.

In particular, since the seat 5 and the screw hole 8 are located near the notch 6, which is the entry point, there is a very high possibility that concrete particles will adhere there.

In some cases, a very troublesome problem arises, such as the need to replace the box due to unscrewing.

In order to solve this problem, a separate box is provided in which the entire circumference of the open end surface 4 is flush with the notch 6, and an insertion hole is formed in the side wall of this box at a position h lower than the open end surface 4. Alternatively, a seat that is a separate member from the box is provided,
It is also conceivable to insert a seat, which is a separate member, into the insertion hole and swage it.

However, this requires different processes such as inserting and crimping a separate member, which becomes more troublesome.

That is, in the box shown in Figure 1, the box precept form,
The shape of the notch 6, the bending of the seat 5, etc. are done by the same series of processes called a press process, but when a separate member is provided, the process is different from the press process in which the separate member is inserted and caulked. process is required and is troublesome.

The present invention was devised in view of the above-mentioned circumstances, and its purpose is to provide a box for buried wiring that can prevent the intrusion of concrete particles without the screw heads getting in the way.

Figures 3 and 5 show embodiments to which the present invention is applied;
The figure is a perspective view showing the entire buried wiring box according to the present embodiment, and FIG. 4 is a perspective view showing an enlarged main part.

Hereinafter, the present invention will be specifically explained according to embodiments shown in the drawings.

That is, the box 11 is made by, for example, shaping an iron plate into a rectangular shape by a pressing process, and one side of the box 11 is open.

Here, the height of this opening end surface 12 is a dimension H, for example, 40 mm.
It is made uniform to mm.

Reference numeral 13 denotes a tongue piece bent inwardly, and this tongue piece 1
3 is provided at the same height as the opening end surface 12, that is, at a height H, parallel to the box bottom wall 11a.

Therefore, the opening end surface 12 of the box 11 and the upper surface of the tongue piece 13 are flush with each other.

In addition, the tongue piece 13 is attached to the opening end surface 1 in the case of the embodiment shown in the drawings.
Although two of the two are provided at opposite positions, the positions and the number may be changed as necessary.

Reference numeral 14 denotes a notch shaped in the tongue piece 13, which is provided inside the box peripheral wall 15 and parallel to the box peripheral wall 15.

16 is a recessed seat for attaching a screw, and has a screw hole 17 made of a female thread.

This screw mounting seat 16 is inserted into the tongue piece 13 through the notch 14.
It is provided by recessing the central portion toward the box bottom wall 11a side.

Therefore, this seat 16 has a depth that covers the screw head 18a, ■
It is said that

18 is a screw for attaching a cover that closes the opening of the box 11.

As mentioned above, the box 11 is formed into a certain shape by the pressing process, and the tongue piece 13 is formed during this pressing process.
, the notch 14, the seat 16, etc. are formed integrally.

Further, 19 is a small diameter recessed portion necessary to keep the upper surface of the tongue piece 13 and the opening end surface 12 at the same height, and as shown in FIG. .

Next, the effects will be explained.

In the present invention, since the tongue piece 13 is formed at the same height as the opening end face 12 of the box 11, the opening end face 12 and the upper surface of the tongue piece 13 are flush with each other.

Therefore, there is no equivalent to the conventional notch 6.

Therefore, when burying the box 11 as shown in FIG.
Since the tongue pieces 13 other than 6 also come into contact with the curtain plate 3, there is no inconvenience such as soft concrete particles before hardening entering the box 11.

Therefore, unlike the conventional method, it is possible to reliably prevent the conch notebook from adhering to the seat 16 or the screw hole 17.

Of course, since the screw mounting seat 16 is recessed to a depth that hides the screw head 18a, there is no problem of the screw head 18a hitting the curtain plate 3.

That is, in the present invention, the intrusion of concrete particles can be prevented without the screw head 18a getting in the way.

In addition to the above effects, the embodiment shown in the drawings also has the following additional effects.

That is, in the embodiment shown in the drawings, since the inclined wall 20 is provided when the seat 16 is formed by the notch 14,
This inclined wall 20 allows the tip of the screw 18 to be guided along the screw hole 17.

Therefore, in the present invention, in a box for buried wiring where a cover is attached to an opening with screws, a tongue piece is curved inward at the same height as the opening end surface, and a notch is formed in this tongue piece. Another feature is that the screw mounting seat is recessed through this notch to a depth that the screw head is hidden, thereby preventing the screw head from getting in the way. To provide a box for buried wiring that is effective in preventing the intrusion of concrete debris without causing any damage.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional buried wiring box, and FIG. 2 is a side view showing the conventional buried wiring box in a buried state. Figures 3 to 5 show examples of the present invention, with Figure 3 being a perspective view of the buried wiring box, Figure 4 being an enlarged perspective view of the main parts, and Figure 5 being a perspective view of the buried wiring box. It is a side view showing the buried state of the box for buried wiring. In the figure, 11 is a box, 12 is an opening end surface, 13 is a tongue piece,
14 is a notch, 16 is a seat for attaching a screw, and 18 is a screw.

Claims (1)

[Scope of utility model registration request] In a buried wiring box whose cover is attached to an opening with screws, a tongue piece is bent inward at the same height as the end face of the opening, a notch is formed in this tongue piece, and this notch is formed. A box for buried wiring, characterized in that a seat for mounting a screw is recessed at a depth that hides the head of the screw.