JPH0510014B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a wiring box cover (hereinafter simply referred to as a box cover), and more particularly to a box cover buried in a concrete slab.

(Prior Art) Conventionally, as shown in FIGS. 6 and 7, a box cover 1 has been attached to a wiring box 20 buried in a concrete slab to attach, for example, a sensor or the like.

This box cover 1 has an opening 2 and a frame 3.
and a cover part 4 formed on the outside of the frame 3. (Japanese Standards Association, published in 1982, "JIS Handbook Electricity, Equipment and Construction Edition", p. 1403 "18"
(Drawings described) (Problems to be solved by the invention) However, when such a box cover 1 is attached to a wiring box and used in the field,
As workers frequently step on wiring boxes at work sites, the external force from stepping on them can cause the wiring boxes to tilt diagonally or come off in the gap between the box cover and the formwork. There was a problem. For this reason, the wiring box with the box cover attached thereto is buried in the concrete slab in an inclined state, which poses a problem in the subsequent installation of sensors and the like. or,
The wiring box that came off had to be reinstalled.

This invention has been made in view of these problems, and has an object to reliably prevent the wiring box from tilting or coming off due to external force such as when a worker steps on the wiring box during work. The purpose of this invention is to provide a box cover that allows for

(Means for Solving the Problems) That is, the present invention provides a cover for a wiring box that is attached to an opening of a wiring box and closely fixed to a concrete form forming a concrete slab, A cover part that covers the opening, an annular frame that protrudes from the cover part and comes into close contact with the concrete formwork, an opening formed by the annular frame, and a height that is approximately equal to the height of the annular frame that protrudes near the periphery of the cover part. and a protrusion having a height of The gist of the product is a wiring box cover that is characterized by its ability to prevent concrete from entering.

(Function) Therefore, in the case of the box cover of the present invention, together with the annular frame protruding from the cover portion of the box cover, the annular frame is provided near the periphery of the cover portion and has approximately the same height as the annular frame. A protrusion having a ridge is adapted to be closely fixed to a concrete form forming a concrete slab. Therefore, this protrusion prevents the wiring box from tilting around the annular frame or coming off from the wiring box due to external force such as an operator stepping on the wiring box during work, and prevents the box cover from being removed. It is designed to prevent concrete from entering the wiring box through the opening.

(Example) Hereinafter, the box cover of the present invention will be explained in detail with reference to the drawings.

As shown in FIGS. 1 to 4, the box cover 11 is composed of an opening 12, an annular frame 13, a cover portion 14, and a protrusion 15.
Each component is manufactured in one piece.

The protrusion 15 is formed at substantially the same height as the annular frame 13 and protrudes near the periphery of the cover portion 14 , that is, on the outer periphery of the cover portion 14 or near the outer periphery of the cover portion 14 . This is because the height of the protrusion 15 is formed to be approximately the same as the height of the annular frame 13, and this protrusion 1
5 protruding near the periphery of the cover part 14, the protrusion 15 is closely fixed to the concrete formwork 21 together with the annular frame 13, and supports the external force applied to the wiring box 20 together with the annular frame 13. This is because the wiring box 20 can be prevented from tilting or coming off. In this embodiment, the protrusion 15
are arranged near the outer periphery of the cover portion 14 at equal intervals.

Note that the shape of the protrusion 15 may be any shape as long as it is formed at approximately the same height as the annular frame 13 and protrudes near the periphery of the cover portion 14, and may be of any shape depending on the size and size of the wiring box to be mounted. Determine by considering the shape etc. The number of protrusions 15 may also be determined in the same manner.

In addition, as shown in FIG. 5, the box cover 1
may be rectangular, and wall-shaped protrusions 15 may be provided protruding from the periphery of the cover portion 14 along each side, and the external force applied to the wiring box can be more reliably supported by the protrusions 15. , in addition, the protrusion 1
The mechanical strength of No. 5 can be increased.

Next, a box cover having the above-mentioned protrusion will be explained.

The box cover 11 has an opening 12 in which an annular frame 13 is formed. A cover portion 14 is provided around the periphery of the annular frame 13. Furthermore, the box cover 11 has screw holes 16 for mounting a sensor, etc., fixing holes 17 and 29 for attaching and fixing the box cover 11 to the wiring box 20, and the box cover 11 is closely attached to the formwork. A nail hole 18 for fixing to is formed.

The outer shape of the box cover 11 is not limited to a circular shape, but may be square as shown in FIG. 5, and the opening 12 may also be circular or oval. It is determined according to the shape and purpose of the wiring box.

The material of the box cover 11 is made of synthetic resin such as polyvinyl chloride.

Next, the state of use of the box cover of the present invention will be explained.

In the case of this embodiment, first, the box cover 11 is brought into contact with the formwork, and the box cover 11
The nails are driven into the nail holes 18 of the mold and are tightly fixed on the formwork. Next, the wiring box 20 is attached to the box cover 11. To install the wiring box 20,
The screw insertion hole 27 provided at the bottom of the wiring box 20 is inserted into the two fixing holes 1 of the box cover 11.
7 from the screw insertion hole 27 to the fixing hole 17.
This is done by passing a head screw.

In addition, in the case of the box cover of the present invention, in addition to the method described above, the hole 29 of the box cover 11 is aligned with the mounting screw hole 30 of the wiring box 20, and the bolt of the mounting screw hole 30 is inserted through this hole 29. By inserting and screwing together the box cover 1
It is also possible to attach the wiring box 1 to the wiring box 1, and then insert a nail into the nail hole 18 and nail it to the formwork to fix it.

Next, a lid 23 is attached to the other end of the wiring box 20 with screws. After that, concrete is poured and the wiring box 20 with the box cover 11 attached is buried in the concrete.

(Effects of the Invention) As described above, in the case of the box cover of the present invention, the projection having substantially the same height as the annular frame protruding near the periphery of the cover portion of the box cover has an annular shape. The wiring box is closely fixed to the formwork together with the frame, and the protrusion supports the wiring box to reliably prevent the wiring box from tilting about the annular frame as a fulcrum even if a worker steps on the wiring box. I can do it. Furthermore, since the projection supports the wiring box together with the annular frame and prevents the wiring box from tilting, the box cover will not come off from the wiring box due to external force. As a result, this box cover does not tilt or come off due to external force, and is always kept tightly fixed to the formwork, allowing wiring to be routed through the opening of the box cover. There is no possibility of concrete entering into the box.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the box cover of the present invention, and FIG. 1 is a perspective view thereof;
Figure 2 is an exploded perspective view showing the box cover and wiring box, Figure 3 is a perspective view showing the box cover attached to the wiring box, and Figure 4 is a buried wiring box with the box cover attached. FIG. 5 is a sectional view showing the state, FIG. 5 is a perspective view showing another embodiment of the box cover of the present invention, and FIG.
The figure is a front view showing a buried wiring box fitted with a conventional box cover, and FIG. 7 is a plan view as well. Explanation of symbols, 11...Box cover, 13
...Annular frame, 14...Cover part, 15...Protrusion,
20...Wiring box.

Claims (1)

[Scope of Claims] 1. A cover for a wiring box that is attached to an opening of a wiring box and closely fixed to a concrete form forming a concrete slab, comprising: a cover part that covers the opening of the wiring box; and a cover part that covers the opening of the wiring box; comprising an annular frame that protrudes and comes into close contact with the concrete formwork, an opening formed by the annular frame, and a protrusion that has approximately the same height as the annular frame that protrudes near the periphery of the cover part, The protrusion prevents the wiring box cover from tilting about the annular frame due to external force applied to the wiring box, and prevents concrete from entering into the wiring box from the opening of the wiring box cover. Cover for wiring box.