JP2512304Y2 - Detecting lid for electrical wiring box - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detection lid for an electric wiring box which is easy to detect while concrete is closed so as not to enter the electric wiring box when building a building.

[0002]

2. Description of the Related Art Conventionally, when building a building, for example, when forming a floor, an electric wiring box is embedded in the floor. When embedded in the floor, it is necessary to close it with a lid to prevent concrete from entering the electric wiring box. As such, as shown in FIG. 4, the lid 5 fitted in the opening of the electric wiring box 50 is used.
2 is known.

[0003]

However, in such a conventional device, as shown in FIG. 4, when embedded in a floor or the like, the lid 52 and the electric wiring box 50 are completely embedded in the concrete 54. It may happen. At that time, the position of the electric wiring box 50 cannot be known only by looking at the surface 56 of the floor. Therefore, it is necessary to hit the vicinity of the position where the electric wiring box 50 is supposed to be embedded with a hammer or the like to find out the position where the electric wiring box 50 is embedded from the change of the sound. 50 openings to the surface 56 such as a floor
There was a problem that it was not easy to open it.

Therefore, the present invention aims to solve the above-mentioned problems, and provides a detection lid for an electric wiring box which can easily detect the electric wiring box after the electric wiring box is embedded in concrete. Especially.

[0005]

In order to achieve such an object, the present invention has the following constitution as a means for solving the problem. That is, in the concrete at the time of building a building, engages the opening of the electrical wiring box embedded toward the opening on the front surface side to close the opening, or
In addition, a thin wall portion is formed along the opening, and a plurality of elastic needle-like protrusions are provided upright toward the surface.
That is, the detection lid of the electric wiring box is provided along the thin portion .

[0006]

When the electric wiring box is embedded in the concrete, the detection lid of the electric wiring box having the above-mentioned structure prevents the concrete from entering through the opening, and when the concrete is leveled, The protrusions bend. Then, when the leveling work is completed, the elasticity causes the needle-like projections to project onto the concrete surface, thereby facilitating the detection of the electrical wiring box buried in the concrete. Moreover, multiple
Hammer, etc. along the center of the needle-like protrusion or along the needle-like protrusion
By tapping with, the thin-walled part will break together with the concrete.
The opening can be opened.

[0007]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a partially sectional perspective view of a detection lid of an electric wiring box according to an embodiment of the present invention. Reference numeral 1 denotes an electric wiring box. The electric wiring box 1 has a bottomed tubular shape, and a plurality of connecting portions 4 for connecting an electric wire tube 2 are formed on a side surface of the electric wire box 1. An electric wire (not shown) passed through the inside can be drawn out into the electric wiring box 1.

In this embodiment, the opening 6 of the electrical wiring box 1 is circular, and the two bosses 7 extending to the vicinity of the opening 6 have screw holes 8 (only one of which is shown in the figure). Are formed. Reference numeral 10 is a detection lid, and this detection lid 10 is provided with a disk-shaped closing portion 12, and this closing portion 12
The wall portion 14 is formed in a circular shape along the outer periphery of the. The wall portion 14 is formed in an outer shape that can be fitted into the opening portion 6 so that the detection lid 10 can be engaged with the electric wiring box 1. Then, the closing portion 12 and the wall portion 14
2, as shown in FIG. 2, they are connected to each other through a thin-walled portion 16 which is depressed in a V shape over the entire circumference and has a predetermined wall thickness.

Inside the thin portion 16, the closed portion 1
Along the outer periphery of the needle 2, the closure 12 has a plurality of needle-like protrusions 1
8 are erected. The needle-shaped protrusions 18 are erected in the same direction as the opening direction of the opening 6, that is, when they are buried in the floor, they are erected toward the surface of the floor, and even when they are buried in concrete, Needle-like protrusions 18 are formed at a height protruding above the surface of the floor. In the present embodiment, the detection lid 10 is made of synthetic resin, and the needle-like protrusions 18 are made to have appropriate elasticity.

[0010] Further, the from the upper end of the wall portion 14, the link-shaped flange portion 20 radially outward are integrally formed. In addition, the wall portion 14 is inflated corresponding to the two boss portions 7 of the electric wiring box 1, and the cover portion 22 is formed so as not to interfere with the boss portion 7.

Next, the operation of the detection lid of the electric wiring box of this embodiment described above will be described. First, the conduit tube 2 is connected to the connecting portion 4 of the electric wiring box 1, and then the wall portion 14 of the detection lid 10 is fitted into the opening portion 6 with the positions of the boss portion 7 and the cover portion 22 aligned. To do. And the collar part 20
Are inserted until they come into contact with each other, and the needle-like protrusions 18 are arranged so as to stand toward the surface of the floor, for example, between reinforcing bars (not shown) of the floor. Then, concrete 24 is poured, the electric wiring box 1 is embedded, and the surface 26 of the floor is finished with mortar or the like.

At this time, the detection lid 10 prevents the intrusion of concrete from the opening 6, and when leveling concrete or mortar, the needle-like protrusions 18 elastically deform and fall down, and leveling work is performed. make it easier. Then, when the leveling operation is completed, the needle-like projections 18 return to their original shapes due to their elasticity and project from the surface of concrete or mortar.

When the opening 6 is opened on the floor after the concrete or mortar is dried, the surface 2 of the floor is used.
The tip of the needle-like protrusion 18 protruding to 6 is detected. Then, on the surface 26 of the floor, the tips of the needle-like protrusions 18 are arranged in a substantially circular shape, and the center or the needle-like protrusions 18
Hit with a hammer 28, etc.

Then, the concrete is cracked, the thin portion 16 is broken, and the concrete is dropped from the opening 6 into the electric wiring box 1. This concrete is scraped out, the concrete around the opening 6 is removed, and wiring (not shown) is provided. Then, a cap (not shown) is fixed to the screw hole 8 with a screw or the like, and the work is completed.

As described above, according to the detection lid of the electric wiring box of this embodiment, even when the electric wiring box 1 is completely embedded in concrete and the surface 26 of the floor is evenly leveled, it is needle-shaped. The protrusion 18 does not bend and does not interfere with the leveling work. Further, after the concrete or the like has dried, the needle-like protrusions 18 project from the surface 26 of the floor, so that the position where the electrical wiring box 1 is embedded can be easily detected.

Moreover, in this embodiment, concrete or the like can be easily cracked by hitting with a hammer 28 or the like in the vicinity of the centers of the needle-like protrusions 18 arranged in a circle or along the needle-like protrusions 18 in a circular shape. At the same time, the thin portion 16 breaks and falls into the electric wiring box 1 together with the closing portion 12. Therefore, the work of breaking concrete or the like can be easily performed.

The present invention is not limited to such an embodiment as described above, and can be implemented in various modes without departing from the scope of the present invention.

[0018]

[Effects of the Invention] As described in detail above, the detection cover of the electric wiring box of the present invention has a needle-like shape even when the electric wiring box is completely embedded in concrete and the floor surface is evenly leveled. After the concrete dries, the protrusions do not bend and hinder the leveling work, and needle-shaped protrusions protrude from the surface of the floor, so make sure that the position where the electrical wiring box is embedded is The effect is that it can be easily detected. Moreover, multiple needles protruding from the surface
With a hammer etc. at the center of the protrusions or along the needle protrusions
By tapping, it breaks along with the concrete along the thin wall.
Can be cut off and the opening can be opened easily
It

[Brief description of drawings]

FIG. 1 is a partial sectional perspective view of a detection lid of an electric wiring box according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part of a detection lid of the electrical wiring box of this embodiment.

FIG. 3 is a partial cross-sectional perspective view showing a state in which the detection lid of the electric wiring box of this embodiment is embedded in concrete.

FIG. 4 is a partial cross-sectional perspective view showing a state in which a conventional electric wiring box is covered and embedded in concrete.

[Explanation of symbols]

 1, 50 ... Electrical wiring box 2 ... Conduit 10 ... Detection lid 16 ... Thin portion 18 ... Needle-like protrusion

Claims (1)

(57) [Scope of utility model registration request] To 1. A within concrete when building a building, it engages the opening of the electrical wiring box embedded toward the opening on the front surface side to close the opening, or
In addition, a thin wall portion is formed along the opening, and a plurality of elastic needle-like protrusions are provided upright toward the surface.
A detection lid for an electric wiring box, which is provided along the thin portion .