JP2847336B2 - Concrete burying box - Google Patents

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 small wall thickness.

[0002]

2. Description of the Related Art Conventionally, when a wiring box is buried in a concrete wall, for example, as shown in FIGS. 24 and 25 , a box 101 is fixed via a fixture 102 which can be installed on a skeletal reinforcing bar S. Concrete was cast and buried.

In this case, the conventional box 101 has a bottom wall, and a hole 111 is provided in the bottom wall.
02 is provided with a protrusion 112, and the protrusion 112 is
1 and bent to attach the fixture 102 to the box 101.

[0004]

However, when attaching the fitting 102 to the conventional box 101, the fitting 1 to be attached to the bottom wall of the box 101 is required.
02 thickness is added to the thickness of the box 101 as it is,
If the box 101 is to be buried in a place where the wall thickness is thin or the space between the skeletal reinforcing bars S is narrow,
There was a problem that it was obstructed by the rear skeletal reinforcement S. For this reason, a troublesome operation such as partially cutting or bending the skeletal reinforcing bar S is required. In addition, there is a case where the coating margin cover 103 is attached to the opening of the box 101 and buried therein. In this case, since the thickness of the coating margin cover 103 is further increased, the above-described problem occurs even if the wall thickness is not thin. was there.

When the fixture 102 is attached to the bottom wall of the box 101, the connector cannot be attached to the bottom wall of the box 101 because of the obstruction of the fixture 102.
There is a problem that piping to the bottom wall of the box 101 cannot be performed.

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

[0007]

SUMMARY OF THE INVENTION
The buried box is “a bottomless box with an open bottom;
A plate-like portion for closing the bottom opening of the bottomless box; and a plate-like portion having a length capable of being installed on a support member such as a skeletal reinforcing bar.
And a bottom plate body comprising an erected portion extending from the base member, and the plate-shaped portion connects the conduit tube.
With a knockout for

[0008]

In the box according to the present invention, since the bottom wall of the box is constituted by the bottom plate having the erection portion, the plate-shaped portion of the conventional fixture is unnecessary, and the thickness of the plate-shaped portion of the fixture is eliminated. This makes it possible to bury the box in a narrow wall between the formwork and the stiffener. Further, when the box is fixed at the embedding position, the erection portion erected on a support member such as a skeletal reinforcing bar 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 concrete casting. Further, in the box according to the present invention, it is possible to mold a bottomless box having a coating margin portion integrated with the front opening with synthetic resin, and manufacture a box according to the combination of the bottomless box and the bottom plate. Is possible. And the knockout is provided on the bottom plate
When connecting conduits, connect them first.
The bottomless box on the bottom plate
You can take steps to attach. As a result, the connector
When installing, locks that used to be
Do not tighten Knuts outside the box
Can make piping work very easy.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

FIG. 1 is an exploded perspective view of one embodiment of a box according to the present invention. In the figure, a bottomless box 1 is formed of a rectangular frame having an open top and bottom. A bottom plate 2 is attached to the bottom side of the bottomless box 1.
It has become so. The bottom plate 2 has a plate-like portion 20 that forms a bottom wall corresponding to the bottom opening 11 of the bottomless box 1 and a bridging portion 21 that is laid on a support member such as a skeletal reinforcing bar.
And the plate-shaped portion 20 has a conduit connection.
That can be used to attach connectors,
A cutout 22 is formed. Here, the bottom plate 2
This corresponds to the bottom plate of the claims.

The plate-like portion 20 is made of a synthetic resin or metal, and the bridge portion 21 is made of a bendable metal having a tensile strength for bringing the bottomless box 1 into close contact with the mold. The erection portion 21 may be plate-shaped or rod-shaped. In the case of a plate shape, if a metal plate is punched and formed into the shape of the bottom plate 2, it is easy to manufacture, can be supplied at low cost, and the bottom plate 2 itself can be thin. Further, as a form at the time of punching , in addition to the bottom plate 2 shown in FIG. 8, as shown in FIG. 7, one of the erection portions 21 is shifted inward from a corner of the plate-shaped portion 20 so that the erection portions 21 overlap. If punching is performed, it is possible to reduce the amount of molding material.

In order to attach such a bottom plate 2 to the bottomless box 1, as shown in FIG. 2, a plate-like portion 20 of the bottom plate 2 which is in contact with the bottom opening 11 of the bottomless box 1 is bonded and attached. Alternatively, as shown in FIGS. 3 and 4, a projection may be provided in the plate-shaped portion 20 of the bottom plate 2 or the bottom opening 11 of the bottomless box 1 and fitted into the bottom opening 11 of the bottomless box 1 for attachment. Alternatively, as shown in FIG. 5 and FIG. In addition,
In the case of mounting with screws, the screws 5 are inserted from the top of the bottomless box 1 as shown in FIG. In some cases. In the case where screws are inserted and mounted, if the long screw mounting holes 24 are provided in the plate-shaped portion 20 as shown in FIG. 1, the mounting position of the bottomless box 1 on the bottom plate 2 can be adjusted. Can be.

The plate-like portion 20 of the bottom plate 2 has a shape that fits into the bottom opening 11 of the bottomless box 1 and a shape that covers the bottom opening 11 of the bottomless box 1 from outside. Anything may be used as long as it closes off.

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 bar-like erection portion 21 erected on a support member. It is.

A coating cover 3 and the like are attached to the upper opening of the bottomless box 1. In addition, the bottomless box 1 according to the present invention has a coating margin 3a as shown in FIG.
May be formed integrally, or as shown in FIG. 11, a closing plate 4 which can be punched out to prevent the toro from entering may be formed integrally.

When such a box is to be buried in a concrete wall, the bottom plate 2 is attached to the bottomless box 1 as shown in FIG. 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, concrete can be poured and the box can be buried.

[0018] Since knockout 22 provided on the bottom plate 2 of the plate-like portion 20 is provided, when connecting the conduit, as shown in FIG. 13, keep in mounting the connector 6 above Therefore, the procedure for attaching the bottomless box 1 to the bottom plate 2 can be taken, so that the work is easy. Immediately
That is, the work of tightening the lock nut 61 when attaching the connector 6 can be performed without the box, which has been conventionally performed in the box, so that the piping work can be performed very easily.

FIGS. 14 and 15 show another embodiment of the box according to the present invention. In the bottomless box 1, a flange 13 having a cutout 14 in the bottom outer peripheral wall is formed.
On the other hand, the bottom plate 2 is provided with a protruding piece 25 that fits into the notch 14 so as to rise from the plate-shaped portion 20.
The bottom piece 2 is attached to the bottomless box 1 by closing the bottom opening 11 of the bottomless box 1 by bending the protruding piece 25 fitted into the inside 4 toward the flange portion 13.

Since such a box does not require any parts such as screws, there is no loss of parts, and the box can be easily mounted. In addition, it was provided in the plate-shaped part 20 of the bottom plate 2.
To connect conduits using knockout 22
As in the case shown in FIG. 13, as shown in FIGS.
First, attach the connector 6 first, and then
The box 1 may be attached to the bottom plate 2.

FIG. 18 shows still another embodiment of the box according to the present invention. The bottomless box 1 of this box is provided with a resilient engaging projection 15 on the side of the bottom opening 11 of the outer peripheral wall. As shown in FIGS. 19 and 20, the engaging projection 15 is sharpened at the front end side and the locking portion 1 is provided at the rear end.
5a is formed in a substantially triangular cross section, both sides of the engaging projection 15 are cut, and the rear end is provided integrally with the bottomless box 1 and moves elastically in the direction of arrow 16 in the figure. It is possible to do.

The bottom plate 2 is formed with a protruding piece 27 having an engaging hole 26 for engaging the engaging projection 15 with the plate-shaped 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 pieces 27, the locking portions 15a of the engagement projections 15 are locked in the engagement holes 26 to prevent the bottom plate 2 from coming off. 1 can be attached.

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

When the boxes shown in FIGS. 14 and 18 are buried in a concrete wall, similarly to the case shown in FIG. 12, as shown in FIG. 15 or FIG. Is attached, and the erection part 21 of the bottom plate 2 is erected on the skeletal reinforcing bar S, and the box is fixed 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 formwork can be erected and concrete can be cast to bury the box.

Note that the tabs provided on the plate portion 20 of the bottom plate 2
When connecting the conduit utilizing Kkuauto 22, FIG.
As shown in FIG. 16 or FIG.
The procedure may be performed in the same manner as described above.

In the case of the box shown in FIG.
A coating cover 3 is formed integrally with the bottomless box 1, and a punchable closing plate 4 is integrally formed at an opening of the coating cover 3, and a drawing bolt is screwed to the closing plate 4. A screw hole 41 is provided. For this reason, as shown in FIG. 23, the pulling bolt B is inserted from the side of the formwork K erected so as to abut the coating cover 3 and screwed into the screw hole 41, and the coating cover is attached to the formwork 3 can be placed in close contact with the box.

Incidentally, the box according to the present invention is shown in FIG.
To house switches and outlets as shown in FIG.
The size and shape of the box are not limited.

[0030]

As described above, in the box according to the present invention, since the bottom wall of the box is constituted by the bottom plate provided with the erection portion, the conventional mounting plate The shape part is not required, and the thickness of the plate part of the fixture is eliminated, so that the box can be buried in the narrow wall between the formwork and the stiffener. Further, when the box is fixed to the embedding position, the erection part erected on a support member such as a skeletal reinforcing bar directly holds the plate-shaped part of the box, so that the box is less likely to be displaced by impact at the time of concrete casting.

Furthermore, in the box according to the present invention, margin portion coating the front opening is can be molded by synthetic resin a bottomless box together, with the bottomless box
It is possible to manufacture a box related to the combination with the bottom plate, and it is possible to reduce the number of parts by eliminating a coating cover that has been conventionally manufactured separately, thereby reducing costs.

The box according to the present invention has a structure in which the plate-like portion of the bottom plate also serves as the bottom wall of the box.
Since the checkout is provided , a connector can be attached to the plate-shaped portion of the bottom plate to allow piping from the box bottom surface side. And when connecting conduits,
After attaching the connector to the bottom plate , remove the box
A procedure for attaching to the bottom plate body can be taken. For this reason, the work of tightening the lock nut when attaching the connector can be performed without the box, which has been conventionally performed in the box, and the piping work can be performed very easily .

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one 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 the bottomless box in the box shown in FIG. 1;

FIG. 3 is a cross-sectional view showing a structure for attaching a bottom plate to the bottomless box in the box shown in FIG. 1;

FIG. 4 is a cross-sectional view showing a structure for attaching a bottom plate to the bottomless box in the box shown in FIG. 1;

5 is a cross-sectional view showing a structure for attaching a bottom plate to the bottomless box in the box shown in FIG. 1;

FIG. 6 is a cross-sectional view showing a structure for attaching a bottom plate to the bottomless box in the box shown in FIG. 1;

FIG. 7 is a front view showing an example of a method for manufacturing a 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 where the box shown in FIG. 1 is attached to a skeletal reinforcing bar.

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

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

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

FIG. 16 is a perspective view showing a state where the box shown in FIG. 14 is attached to a skeletal reinforcing bar.

FIG. 17 is a perspective view showing a state where the box shown in FIG. 14 is attached to a skeletal reinforcing bar.

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

FIG. 19 is a partially enlarged sectional view showing an assembled state of the box shown in FIG. 18;

FIG. 20 is a partially enlarged cross-sectional view showing an assembled state of the box shown in FIG. 18;

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

FIG. 22 is a perspective view showing a state where the box shown in FIG. 18 is attached to a skeletal reinforcing bar.

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

FIG. 24 is an exploded perspective view of a conventional box.

FIG. 25 is a cross-sectional view showing a state in which a conventional box is attached to a skeletal reinforcing bar.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 bottomless box 2 bottom plate 3 paint cover 3 a paint margin 11 bottom opening 20 plate-like portion 21 bridge portion 22 knockout

Claims (1)

(57) [Claims] 1. A bottomless box with an open bottom surface; a plate-like portion for closing the bottom surface opening of the bottomless box; and a plate-like portion having a length such that it can be installed on a support member such as a reinforcing steel bar. From
And the issued installing portion bottom plate and the body consisting of: become an assembled by fixing means, said plate-like portion, a knockout for connecting a conduit
A concrete burying box provided with: