JPH09140027A - Cover for board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the work efficiency in an electric installation work and reduce the construction cost by locating claw sections which have female screw holes behind the edge of a hole made at the center by the space enough to keep the edge of a blade of an electric cutter away from the claw sections. SOLUTION: At the center of a cover face 2 of a cover 1 for one piece of a nearly square-shaped and flat board, a hole 3 is formed for installing a plug socket, various switches, various kinds of electric apparatuses, etc. On the upper and the lower edge of the hole 3, claw sections 6 which have female screw holes 5 are integrated with the cover 1. Each claw section 6 consists of a vertical section 6a which is bent vertically from the edge of the hole 3 and a parallel section 6b with the female screw hole 5 which, being extended from the vertical section 6a, is bent parallelly to the edge of the hole 3. The parallel section 6b is located behind the cover face 2 by the space S enought to keep it from the edge of a blade of an electric cutter, that is, it is located in the back of the edge of the hole 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conduit accessory used for electric wiring inside a wall surface of a building,
The present invention relates to an improvement of a board cover that is used by being mounted on the front surface of an outlet box, a concrete box, a switch box, or the like.

[0002]

2. Description of the Related Art A board cover is a front surface of a box for accommodating electric wires to be wired inside a wall surface of a building, that is,
It is installed on the front of the box so that it is located between the veneer plate material or gypsum board that forms the wall surface and the box, and is used to attach outlets, switches, and various electrical appliances. Is one.

FIG. 3 is a view showing a switch cover with one coat as an example of a conventional board cover.
3A is a front view and FIG. 3B is a side view.

FIG. 4 is a view showing a flat switch cover for one piece as an example of a conventional board cover. FIG. 4 (a) is a front view and FIG. 4 (b) is a side view. .

As shown in FIG. 3, the coating allowance portion 1 projecting from the cover surface 12 of the coating allowance cover 11 to the front surface by about 13 mm.
The surface 14 of FIG. 3 has a hole 15 for inserting an outlet, a switch, etc., and is attached to the surface 14.
The upper and lower sides of the claw portion 1 in which 4 mm female screw holes 16 are set up
7 is molded. Note that 18 and 19 are a mounting hole and a notch for mounting the cover 11 on a box (not shown), respectively.

Further, as shown in FIG. 4, the flat cover 21 is provided.
Similarly, a hole 23 for attaching an outlet, a switch and the like is similarly drilled in the cover surface 22 of the above, and a claw portion 25 having a female screw hole 24 of 4 mm is integrally formed above and below the cover surface 22. It is molded.

Numerals 26 and 27 are a mounting hole and a notch for mounting the cover 21 on a box (not shown), respectively.

[0008]

FIG. 5 is a schematic diagram of a box having a board cover mounted on the front surface. First, when performing electrical equipment work for mounting an outlet, a switch, or the like from the surface of a wall, first, a plywood board or plaster is used. It is a figure which shows the process of cutting out the wall surface formed by a board etc. with an electric cutter.

In the conventional board cover, the upper and lower claws 17 of the surface 14 of the coating allowance portion 13 of the coating allowance cover 11 shown in FIG. 3 or the upper and lower sides of the cover surface 22 of the flat cover 21 shown in FIG. The shape of the claw portion 25 is a cause of impairing the workability when cutting out the wall surface of the building for the electric facility construction.

That is, as shown in FIG. 5A, for example, the step of cutting out by operating an electric cutter (not shown) along with the shape of the protruding claw portion 25 of the conventional flat cover 21 is workable. 5 is not only bad, but also after the fact that the female screw hole 24 of the claw portion 25 can be used, as shown in FIG.
As shown in (b), it is further necessary to remove the projecting portions 26 existing at the upper and lower two places of the board 27 by an electric cutter as shown by the arrow, which lowers the work efficiency and causes the wasteful construction cost. Has become.

An object of the present invention is to provide a board cover which can contribute to improvement of work efficiency and reduction of construction cost in construction of electric facility construction.

[0012]

In order to achieve the above object, the present invention is to be attached to the front surface of a box for electric wiring of a building, which is provided with a hole in the center and at the edge of the hole. In a board cover integrally formed with a claw portion having a female threaded hole, the claw portion is positioned so as to be shifted rearward from the edge of the hole by a space for avoiding the cutting edge of the electric cutter. It is a feature.

[0013]

1 is a view showing a cover for a board which is an embodiment of the present invention. FIG. 1 (a) is a front view, FIG. 1 (b) is a side view, and FIG. FIG. 1C is a sectional view taken along the line AA ′ in FIG.

As shown in FIG. 1 (a), an outlet, a switch, various electric appliances and the like are attached to the cover surface 2 of a board cover 1 for a single flat plate having a substantially square shape. A hole 3 for is formed.
A plurality of mounting holes 4 for mounting the board cover 1 to a box (not shown) with screws are formed in the periphery of the cover surface 2.

As shown in FIGS. 1 (b) and 1 (c), claw portions 6 provided with female screw holes 5 are integrally formed at the upper and lower positions of the edge of the hole 3. The shape of the claw portion 6 is not on the same plane as the cover surface 2 of the cover 1 as in the conventional cover, but is bent backward from the cover surface 2 of the board cover 1 in a hook shape, so that And is set back to form a step. That is, the claw portion 6 is composed of a vertical portion 6a bent vertically from the edge of the hole 3 and a parallel portion 6b having a female screw hole 5 continuous with the vertical portion 6a and bent parallel to the edge of the hole 3. The formed parallel portion 6b is located rearward of the cover surface 2 by the space S for avoiding the blade edge of the electric cutter.

Therefore, the edge shape of the hole 3 bored in the central portion of the board cover 1 is formed as a uniform smooth curved surface over the entire circumference.

FIG. 2 is a cross-sectional view showing the work of cutting out a board in the electric equipment work performed using the board cover, which is an embodiment of the present invention.

The board cover 1 is attached to the front surface of a box 7 by screws, and the box 7 is normally mounted in the horizontal direction, that is, in the vertical direction of FIG.
Alternatively, it is supported by the round steel or the like inside the wall surface by a round steel or box support fitting for all screws.

The claw portion 6 of the board cover 1 is attached to the box 7
The work of cutting the board 8 forming the wall surface with the electric cutter 9 by bending it in the direction of the inside in the shape of a hook and forming a step at the position of the female screw 5 hole from the cover surface 2 of the board cover 1 is performed. Unlike the conventional method, it is not a cutout that traces a complicated projecting shape in the upper and lower claw portions 6, but a cutout work of only a smooth curved surface. Therefore, this process can be a simple work. Since there are usually a great number of outlets, switches, and various electric appliances and the like installed therein, it is possible to significantly improve the work efficiency in electric equipment construction, and eventually reduce the construction cost.

In the above description, the flat board cover 1 has been described, but similarly for the coating substitute board cover, the claw portion is formed by forming a step rearward from the edge of the hole. It can be used exactly as in the case of the flat type. Further, in the above description, the example of the one-piece switch cover has been described, but the same can be applied to the case of the two-piece switch cover, the round shape cover, the instrument cover, the switch box cover, and the like.

[0021]

As described above, according to the present invention,
Since the claw part integrally formed on the edge of the hole is positioned so as to be displaced rearward from the edge of the hole by the space for avoiding the blade edge of the electric cutter, the work efficiency can be improved in the construction of electrical equipment. It can contribute to improvement and reduction of construction cost.

[Brief description of the drawings]

FIG. 1 is a diagram showing a board cover according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a work of cutting out a board in an electric installation work using a cover according to the present invention.

FIG. 3 is a diagram showing an example of a conventional cover.

FIG. 4 is a diagram showing another example of a conventional cover.

FIG. 5 is a diagram showing a work of cutting out a board in a conventional electric facility construction.

[Explanation of symbols]

 1 Board Cover 2 Cover Surface 3 Hole 4 Mounting Hole 5 Female Screw Hole 6 Claw 6a Vertical 6b Parallel 7 Box 8 Board 9 Electric Cutter S Space

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Daijiro Watanabe 1-32 Kanda Jimbocho, Chiyoda-ku, Tokyo Toyama Electric Co., Ltd.

Claims (2)

[Claims] 1. A board for mounting on a front surface of a box for electrical wiring of a building, comprising a hole in the center, and integrally forming a claw portion having a female screw hole at an edge of the hole. In the cover, the board cover is characterized in that the claw portion is positioned so as to be displaced rearward from the edge of the hole by an amount of space for avoiding the blade edge of the electric cutter. 2. A vertical portion in which the claw portion is bent perpendicularly from the edge of the hole, and a parallel portion having the female screw hole, which is continuous with the vertical portion and is bent in parallel to the edge of the hole. The cover for a board according to claim 1, which is formed from