JPH05252636A - Concrete-buried box - Google Patents

Abstract

PURPOSE:To provide a concrete buried box suitable for burying into a concrete wall having a thin thickness of the wall. CONSTITUTION:The box is constituted of a thin bottomless box 1, whose bottom surface is opened, and a bottom plate 2, having a plate section 20 for blockading the opening 11 of the bottom surface and installing units 21 for installing the box on supporting frames of reinforcing bars, while the box is constituted so that the bottom wall of the bottomless box 1 is formed by attaching the bottom plate 2 to the opening 11 of the bottom surface of the bottomless box 1. The installing units 21 of the bottom plate 2 are installed on the reinforcing bars supporting frames whereby the box can be fixed to a predetermined buried position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete burying box (hereinafter referred to as a box) suitable for burying in a concrete wall having a thin wall.

[0002]

2. Description of the Related Art Conventionally, for example, when a wiring box is embedded in a concrete wall, as shown in FIGS. 25 and 26, the box 101 is fixed via a fixture 102 that can be erected on a skeletal rebar S, I was pouring concrete and burying it.

In this case, the conventional box 101 has a bottom wall, and the bottom wall is provided with a hole 111, while the fixture 1
02 is provided with a projection 112, and the projection 112 is formed into a hole 11
The fixture 102 was attached to the box 101 by inserting it into the box 1 and bending it.

[0004]

However, when the fixture 102 is attached to such a conventional box 101, the fixture 1 attached to the bottom wall of the box 101.
The thickness of 02 is added to the thickness of the box 101 as it is,
When attempting to embed the box 101 in a place where the wall thickness is thin or where the distance between the skeletal reinforcing bars S is small,
There was a problem that it was disturbed by the rear supporting bar S. Therefore, it is necessary to perform a troublesome work such as cutting or bending a part of the skeletal reinforcing bar S. In addition, there is a case where the opening of the box 101 is embedded with the coating allowance cover 103. In this case, since the thickness of the coating allowance cover 103 is further added, the above-mentioned problem occurs even if the wall thickness is not thin. was there.

Further, when the mounting tool 102 is mounted on the bottom wall of the box 101, the connector cannot be mounted on the bottom wall of the box 101 due to the hindrance of the mounting tool 102.
There was a problem that piping to the bottom wall of the box 101 could not be performed.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to solve the above problems and to provide a box which can be buried in a predetermined embedding position even in a place where the wall thickness is thin. ..

[0007]

[Means for Solving the Problems] That is, in order to solve the above-mentioned problems, the means adopted by the present invention are: "a bottomless box having an open bottom; A bottom plate having a erection portion for erection on a supporting member such as a reinforcing bar; and a bottom plate assembled by fixing means.

[0008]

In the box according to the present invention, since the bottom wall of the box is composed of the bottom plate having the erected portion, the plate-shaped portion of the conventional fixture is not required, and the thickness of the plate-shaped portion of the fixture is reduced. Since there is no more space, it is possible to embed the box even in the wall where the space between the formwork and the skeletal reinforcement is narrow. Further, when the box is fixed to the burying position, the erection portion erected on the supporting member such as the supporting ribs directly holds the bottom plate of the box, so that the box is less likely to be displaced by an impact at the time of placing concrete. Further, in the box according to the present invention, it is possible to mold a bottomless box in which the coating margin portion is integrated in the front opening with synthetic resin, and to manufacture the box according to the combination of the bottomless box and the bottom plate. Is possible.

[0009]

The present invention will be described in detail below with reference to the embodiments shown in the drawings.

FIG. 1 is an exploded perspective view of an embodiment of a box according to the present invention. In the figure, the bottomless box 1 is formed of a rectangular frame body having an open top and bottom. On the bottom surface side of the bottomless box 1, a bottom plate including a plate-shaped portion 20 forming a bottom wall corresponding to the bottom opening 11 of the bottomless box 1 and a erected portion 21 erected on a supporting member such as a supporting rib. 2 can be attached.

The plate-like portion 20 is made of synthetic resin or metal, and the erection portion 21 is made of bendable metal having a tensile strength to bring the bottomless box 1 into close contact with the mold. The erected portion 21 may have a plate shape or a rod shape. In the case of a plate shape, if a metal plate is punched and formed in the shape of the bottom plate 2, the manufacturing is easy, the material can be supplied at low cost, and the bottom plate 2 itself can be thin. Further, as shown in FIG. 7 as a form at the time of punching, if one of the erected portions 21 is displaced inward from the corner of the plate-like portion 20 and the erected portions 21 are punched so as to overlap each other, saving of the molding material can be achieved. Can be planned.

In order to attach such a bottom plate 2 to the bottomless box 1, as shown in FIG. 2, the plate-like portion 20 of the bottom plate 2 which is brought into contact with the bottom opening 11 of the bottomless box 1 is adhered and attached. Alternatively, as shown in FIGS. 3 and 4, a protrusion may be provided in the plate-shaped portion 20 of the bottom plate 2 or in the bottom opening 11 of the bottomless box 1 and fitted into the bottom opening 11 of the bottomless box 1 to be attached. Alternatively, as shown in FIGS. 5 and 6, the screw 5 may be used for attachment. In addition,
When mounting with screws, as shown in FIG. 5, when inserting the screws 5 from the bottom side of the bottomless box 1 and mounting, as shown in FIG. 6, insert the screws 5 from the top surface of the bottomless box 1. May be installed by In addition, in the case where a screw is inserted and attached, if a long screw attachment hole 24 is provided in the plate-shaped portion 20 as shown in FIG. 1, the attachment position of the bottomless box 1 to the bottom plate 2 can be adjusted. You can

Further, as shown in FIG. 8, the plate-like portion 20 of the bottom plate 2 may be provided with a knockout 22 for attaching a connector which is a conduit connector and for inserting a conduit. The plate-shaped portion 20 of the bottom plate 2 has a shape to be fitted into the bottom opening 11 of the bottomless box 1, the bottom opening 11 of the bottomless box 1.
Any shape may be used as long as it closes the bottom opening 11 regardless of the shape that covers the outside.

FIG. 9 shows another embodiment of the bottom plate 2, which is composed of a plate-like portion 20 for closing the bottom opening 11 of the bottomless box 1 and a rod-like erection portion 21 erected on the support member. Is.

A paint removal cover 3 and the like are attached to the upper opening of the bottomless box 1. The bottomless box 1 according to the present invention has a coating margin portion 3a as shown in FIG. 10 in addition to the case where the separate coating margin cover 3 is attached.
May be integrally formed, or as shown in FIG. 11, a punchable closing plate 4 for preventing intrusion of the toro may be integrally formed.

When burying such a box in a concrete wall, the bottom plate 2 is attached to the bottomless box 1 as shown in FIG. 12, and the erection portion 21 of the bottom plate 2 is erected on the skeletal rebar S. To secure the box in place.

Next, a connector is attached to the box and a conduit is connected. If necessary, the coating cover 3 is attached to the box. After that, the formwork can be erected and concrete can be poured to be buried in the box.

When connecting a conduit by using the knockout provided in the plate-shaped portion 20 of the bottom plate 2, as shown in FIG. 13, the connector 6 is first attached to facilitate the work. After that, the procedure for attaching the bottomless box 1 to the bottom plate 2 can be taken. With this configuration, the lock nut 6 when the connector 6 is attached
The tightening work of No. 1 can be done without the box, which was conventionally done in the box, so that the piping work can be performed very easily.

14 and 15 show another embodiment of the box according to the present invention, in which the bottomless box 1 is provided with a collar portion 13 having a notch 14 on the outer peripheral wall on the bottom side thereof.
On the other hand, the bottom plate 2 is provided with a projecting piece 25 fitted in the notch 14 upright from the plate-shaped portion 20.
By bending the projecting piece 25 fitted in 4 into the flange 13, the bottom opening 11 of the bottomless box 1 is closed, and the bottom plate 2 is attached to the bottomless box 1.

Since such a box does not require parts such as screws, the parts are not lost and the box can be easily attached.

FIG. 18 shows still another embodiment of the box according to the present invention. The bottomless box 1 of this box is provided with an elastic engagement projection 15 on the bottom surface opening 11 side of its outer peripheral wall. As shown in FIG. 19 and FIG. 20, the engagement projection 15 has a sharpened front end side and a locking portion 1 at the rear end.
5a is formed into a substantially triangular cross section, both sides of the engaging projection 15 are cut, the rear end is integrally provided with the bottomless box 1, and it moves elastically in the direction of arrow 16 in the figure. Is ready for you.

The bottom plate 2 is formed with a projecting piece 27 having an engaging hole 26 for engaging the engaging projection 15 with the plate-like portion 20 at a position corresponding to the engaging projection 15.

As shown in FIGS. 19 and 20,
When the bottom plate 2 is pressed against the bottomless box 1 so as to cover the protruding piece 27, the locking portion 15a of the engagement projection 15 is locked in the engagement hole 26 and is in a retaining state, so that the bottom plate 2 is closed. It can be attached to 1.

In such a box, the bottom plate 2 can be attached to the bottomless box 1 with a single touch, and the box can be attached more easily than with a screwing or bending fastening structure.

When the box shown in FIGS. 14 and 18 is embedded in a concrete wall, as in the case shown in FIG. 12, the bottom plate 2 is placed on the bottomless box 1 as shown in FIG. 15 or FIG. Is attached, and the erected portion 21 of the bottom plate 2 is erected on the skeletal rebar S to fix the box at a predetermined embedding position.

Next, a connector is attached to the box and a conduit is connected. If necessary, the coating cover 3 is attached to the box. After that, the form can be erected and concrete can be poured to bury the box.

When connecting a conduit by using the knockout provided on the plate-shaped portion 20 of the bottom plate 2, as shown in FIG. 16 or FIG. 22, as in the case shown in FIG. In order to facilitate the above, it is possible to first attach the connector 6 and then attach the bottomless box 1 to the bottom plate 2.

In the case of the box shown in FIG. 18,
A coating strip cover 3 is formed integrally with the bottomless box 1, a punchable closing plate 4 is integrally formed in the opening of the coating strip cover 3, and a pulling bolt is screwed to the closing plate 4. A screw hole 41 is provided. For this reason, as shown in FIG. 23, the drawing bolt B is inserted from the side of the mold K which is erected so as to abut the paint allowance cover 3 and screwed into the screw hole 41, and the paint allowance cover is attached to the form K. The box can be installed by closely attaching the three.

FIG. 24 shows still another embodiment of the box according to the present invention. The box is smaller than the box shown in FIGS. 1 to 23, and has a bottom opening 11 to which the bottom plate 2 is attached from its side wall.
The hub 17 is formed to project obliquely toward the side,
It is used for pulling out cables and electric wires.

As described above, the box according to the present invention is not limited to the box for accommodating the switch and the outlet as shown in FIGS. 1 to 23, but may be a small box for pulling out the cable as shown in FIG. The size and shape of the box are not limited to those in the above embodiment.

[0031]

As described above, in the box according to the present invention, since the bottom wall of the box is composed of the bottom plate having the erected portion, the plate-shaped portion of the conventional mounting tool is not required, and the mounting tool is not required. Since the thickness of the plate-shaped portion is eliminated, the box can be embedded even in the wall having a narrow interval between the formwork and the skeletal reinforcement. Further, when the box is fixed to the burying position, the erection portion erected on the supporting member such as the supporting ribs directly holds the bottom plate of the box, so that the box is less likely to be displaced by an impact at the time of placing concrete.

Further, in the box according to the present invention, it is possible to mold a bottomless box in which a coating margin is integrated in the front opening with a synthetic resin, and to combine the bottomless box and the bottom plate. It is possible to manufacture boxes,
It is possible to reduce the number of parts by eliminating the need for a coating stock cover that is manufactured separately, and to reduce the cost.

Further, in the box according to the present invention, the plate-shaped portion of the bottom plate also serves as the bottom wall of the box, so that the connector can be attached to the plate-shaped portion of the bottom plate to allow piping from the bottom side of the box. Furthermore, when connecting conduits, first attach the connector to the bottom plate, then
You can take the steps to attach the box to the bottom plate.
Therefore, the work of tightening the lock nut when attaching the connector can be done without the box, which was conventionally done in the box, and there is also an effect that piping work can be performed very easily. There is.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a box according to the present invention.

FIG. 2 is a cross-sectional view showing a structure for attaching a bottom plate to a bottomless box of the box shown in FIG.

FIG. 3 is a cross-sectional view showing a structure for attaching a bottom plate to a bottomless box of the box shown in FIG.

FIG. 4 is a cross-sectional view showing a structure for attaching a bottom plate to a bottomless box of the box shown in FIG.

5 is a cross-sectional view showing a structure for attaching a bottom plate to a bottomless box of the box shown in FIG.

6 is a cross-sectional view showing a structure for attaching a bottom plate to a bottomless box of the box shown in FIG.

FIG. 7 is a front view showing an example of a method of manufacturing the bottom plate.

FIG. 8 is a front view showing another example of the bottom plate.

FIG. 9 is an exploded perspective view showing another embodiment of the box according to the present invention.

FIG. 10 is a perspective view showing an example of a bottomless box.

FIG. 11 is a perspective view showing another example of the bottomless box.

FIG. 12 is a perspective view showing a state in which the box shown in FIG. 1 is attached to a supporting bone rebar.

FIG. 13 is a perspective view showing a state in which the box shown in FIG. 1 is attached to a supporting bone rebar.

FIG. 14 is an exploded perspective view showing another embodiment of the box according to the present invention.

FIG. 15 is a perspective view of the box shown in FIG. 14 in an assembled state.

16 is a perspective view showing a state in which the box shown in FIG. 14 is attached to a supporting bone rebar.

FIG. 17 is a perspective view showing a state in which the box shown in FIG. 14 is attached to a supporting bone rebar.

FIG. 18 is an exploded perspective view showing another embodiment of the box according to the present invention.

19 is a partially enlarged sectional view showing an assembled state of the box shown in FIG.

20 is a partially enlarged cross-sectional view showing an assembled state of the box shown in FIG.

FIG. 21 is a perspective view showing how the box shown in FIG. 18 is attached to a skeletal rebar.

22 is a perspective view showing a state in which the box shown in FIG. 18 is attached to a supporting bone rebar.

23 is a cross-sectional view showing an example of attachment of the box shown in FIG. 18 to the formwork.

FIG. 24 is an exploded perspective view showing another embodiment of the box according to the present invention.

FIG. 25 is an exploded perspective view of a conventional box.

FIG. 26 is a cross-sectional view showing a state in which a conventional box is attached to a supporting bone rebar.

[Explanation of symbols]

 1 bottomless box 2 bottom plate 3 coating cover 3a coating margin part 11 bottom opening 20 plate-like part 21 installation part

Claims (1)

[Claims] 1. A bottomless box having an open bottom; a bottom plate that closes the bottom opening of the bottomless box and has a erection portion for erection on a supporting member such as a skeletal rebar. A concrete burial box characterized by being assembled.