JPH01133513A - Double floor box - Google Patents

Abstract

PURPOSE:To increase the load resistance strength of an upper surface cover forming a part of a floor surface, by setting a stiffener rising up to the upper surface cover closing an opening section, on the bottom surface of a box main- unit with the opening upper surface for containing an electrical wiring apparatus. CONSTITUTION:In place of a part of a plurality of block members 7 arranged vertically and horizontally, a double floor box 1 consisting of a box main-unit 2 and an upper surface cover 3 is set, and an electrical apparatus which is not shown in figures is contained in, and wiring under a floor is executed. Into the notched section 10a of a bearing piece 10 fitted on the side wall of the box main-unit 2, a rise stiffener 4 is inserted, and is butted to the bottom section of the box 1 and the rear side of the upper surface cover 3. As a result, the load resistance strength of the upper surface cover 3 forming a floor surface is increased, and internal spaces 5, 6 are divided into a heavy current system and a weak current system and are used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a double-floor box used for a distribution board, etc. in a double-floor office such as an intelligent building or an office where OA equipment is installed.

[Background technology]

Conventionally, as a floor-embedded box for storing terminal blocks, etc., a box main body 5 with an opening on the top surface is used, as shown in FIG.
0 into the opening 55 of the floor surface 51, and the box body 50
There is one in which a top cover 53 is placed on a flange 52 on the periphery of the top surface and fixed with mounting screws 56. Since the top cover 53 becomes a part of the floor surface, reinforcing ribs 54 are provided to improve load resistance. Further, instead of the reinforcing ribs 54, the plate material forming the top cover 53 may be made thicker.

However, since the reinforcing ribs 54 are supported by the flanges 52 of the box main body 50 only at both ends, if the box main body 50 is made large enough to be used as a distribution board, etc., the span between the supporting points becomes long, and the You must use something sturdy.

The same applies if the top cover 53 itself is made thicker.

Therefore, there is a problem in that a large number of materials are used for the top cover 53 and the reinforcing ribs 54.

[Purpose of the invention]

An object of the present invention is to provide a double-floor box that uses fewer materials and has a simple structure that can improve the load-bearing strength of the top cover.

[Disclosure of the invention]

The double-floor box of the present invention includes a box main body whose top surface is open and electrical wiring equipment is housed, and a top cover that closes the top opening of the box main body. A standing reinforcement member is provided that extends to the top cover.

According to the configuration of this invention, since the standing reinforcement member extending from the bottom of the box body to the top cover is provided, the top cover can be supported at the middle part, and the span between the support parts of the top cover is shortened. .

Therefore, the load-bearing strength of the top cover can be improved with a simple configuration without increasing the amount of materials used.

An embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. This double floor box 1 includes a box body 2 and a top cover 3 that closes a top opening 11 of the box body 2, and is provided with a rising reinforcement member 4 extending from the bottom to the top cover 3 inside the box body 2. It is something that The box body 2 has an open top surface, and a flange 2a is provided at the periphery of the opening 11. The opening/closing cover 3 has a flange 3 on the bottom surface.
It is placed on the flange 2a of the box body 2 at point a.

The upright reinforcement member 4 is composed of a partition plate, and divides the inside of the box body 2 into two storage spaces 5 and 6. This double-floor box 1 is used, for example, as a distribution board, and both storage spaces 5.6 store heavy electrical equipment and low electrical equipment separately. As shown in FIG. 2, the upright reinforcing member 4 is installed by inserting it into a notch 9 provided in the flange 2a of the box body 2 and a notch 10a provided in the support piece 10.

As shown in FIGS. 1 and 3, this double floor box 1 is used for a double floor in which block flooring 7 is spread over a lower floor 8, and one block flooring 7
It is formed to the same size. A carpet (not shown) is laid on the upper surfaces of the block flooring material 7 and the double floor box 1.

According to this configuration, since the upright reinforcement member 4 extending from the bottom of the box body 2 to the top cover 3 is provided, the top cover 3 can be supported at the intermediate portion, and the span between the support parts of the top cover 3 can be reduced. Becomes shorter. Therefore, the loading strength of the top cover 3, which becomes a part of the floor surface, is reinforced.
This can be done with a simple configuration without increasing the wall thickness. Further, since it is not necessary to provide the top cover 3 with strong reinforcing ribs as in the conventional case, the effective space inside the double floor box 1 becomes larger.

Since the standing reinforcement member 4 is composed of a partition plate, the strong electric system and the weak electric system can be separated into storage spaces 5 and 6 on both sides of the standing reinforcement member 4, and can be stored in a composite manner in the same double floor box 1. . This improves the efficiency of floor space usage and facilitates maintenance and inspection in one place.

FIGS. 4 to 9 each show other embodiments.

In each of these embodiments, the same effects as described above can be obtained.

In the example shown in FIG. 4, the upright reinforcing member 4 is L-shaped and is fixed to the bottom wall of the box body 1 with screws 12.

In the example shown in FIG. 5, the upright reinforcing member 4 is fixed to a wooden board 13 fixed on the bottom wall of the box body 1 with screws 12.

The examples shown in FIGS. 6 to 9 are of a type in which an outer frame 15 surrounding the top cover 3 is placed on the box body 1. The outer frame 15 is provided with legs 16 to be placed on the lower floor 8.

In the example of FIG. 7, M1 while closing the opening of the box body 20
7 is provided integrally with the standing reinforcement member 4, and the inner lid 17 also serves to prevent the standing reinforcement member 4 from falling.

In the example shown in FIG.
It is fixed at 9.

In the example of FIG. 9, support pieces 18 are attached to multiple locations on the box body 3.
is provided so that the upright reinforcement member 4 can be moved and placed on any support piece 18.

In each of the above embodiments, the upright reinforcing member 4 is made of a partition plate, but the upright reinforcing member 4 may be one or more rod-shaped ones.

〔Effect of the invention〕

The double floor box of the present invention is provided with a standing reinforcement member extending from the bottom of the box body to the top cover, so the top cover can be supported at the middle part, and the span between the support parts of the top cover can be reduced. Becomes shorter. Therefore, the load-bearing strength of the top cover, which forms part of the floor surface, can be reinforced with a simple structure without increasing the amount of materials used.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is an exploded perspective view thereof, FIG. 3 is a perspective view of the floor on which the double floor box is placed, and FIGS. 4 to 9 are FIG. 10 is a sectional view of another embodiment of the present invention, and FIG. 10 is a perspective view of a conventional example. l...Double floor box, 2...Box body, 3
... Top cover, 4... Upright reinforcement material, 5.6...
Storage space, 7...Block floor material 1...Double floor box 2...Box body 3...Top cover 4...Rise reinforcement material 5.6...Storage space 7...・Block flooring Figure 1 ■ Figure 2 Figure 5 Figure 8 Figure 9 @10 Figure

Claims (2)

[Claims] (1) A box body having an open top surface and housing electrical wiring equipment, and a top cover that closes the top opening of the box body, and a riser extending from the bottom of the box body to the top cover within the box body. Double floor box with reinforcement. (2) The double-floor box according to claim (1), wherein the upright reinforcing material is a partition plate that partitions the inside of the box main body.