JPH019226Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of an embedded box for wiring to be embedded in a concrete frame, and more specifically, to an embedded box for wiring that can be inserted into a recess opened in a concrete frame and easily fixed. It is something.

In general, the methods of fixing embedded boxes that are inserted and fixed into recesses that open in concrete frameworks are largely those that use mounting brackets embedded in the recesses, or those that utilize the self-fixing function of the recessed boxes themselves. Separated.

The former method of using mounting brackets is a commonly used method, but it is time-consuming because the mounting brackets must be set before concrete is poured, and there is a risk that the mounting brackets may shift from the specified position. They may be buried, and their correction is troublesome.

On the other hand, the latter method of using a recessed box with a self-fixing function is easy and simple, as all you have to do is insert the recessed box into the recess and fix it. This is what we provide.

Therefore, the conventional embedded box 20a having a self-fixing function shown in Utility Model Application No. 52-161497 is
As shown in the figure, a band-like ∧-shaped elastic locking piece 11a is arranged parallel to the bottom wall 4a of the embedded box body 1a.
is attached to the bottom wall 4a via the screw 10a, and the screw 1
The locking piece 11a is bent and extended by the movement of the locking piece 11a, and the length of the locking piece 11a is expanded and contracted, so that the side surface inside the recess 11 and the tip 12a of the locking piece 11a come into pressure contact and are fixed.

Therefore, since the protruding length of the locking piece 11a is the same on both sides, the embedded box 20a is always fixed at the center of the box recess. That is, if the box recess is inclined, the embedded box 20a will also be fixed at an angle, so it is necessary to form the box recess accurately.

This idea was made in consideration of the above points,
To provide a simple embedding box in which the protruding length of a locking piece can be independently varied on both sides.

That is, the embedded box for wiring according to this invention is used by inserting and fixing it into the recess 21 opened in the main body A. A locking piece 1 is provided with brackets 3, 3, and separately consists of a pair of opposing base parts 13, 14, and an outwardly convex bending part 12 bridging the upper ends of both base parts 13, 14.
1 to both brackets 3, 3, and the locking piece 1
A screw 10 that passes through the insertion hole 16 provided in one base 13 of the bracket 1 and the screw hole 17 provided in the other base 14 is installed on the bracket 3, and the locking piece 11 is attached, and by rotation of the screw 10, The distance between the two base parts 13 and 14 is varied so that the extension length of the bending part 12 can be adjusted freely.

The embedded wiring box according to this invention will be explained based on the embodiments shown in FIGS. 2 to 9.

Reference numeral 1 denotes an embedding box body made of resin or metal, which has approximately the same shape as a normal embedding box.

As shown in FIGS. 3 and 4, this recessed box body 1 has the centers of both side walls 2, 2 depressed inward in the shape of a window to form locking piece mounting brackets 3, 3 each having a U-shaped cross section. It is formed. That is, the bracket 3 has bracket surfaces 5 and 6 that are connected to the side wall 2 at least in the direction of the bottom wall 4 to form a receiving chamber 7.

In the illustrated example, the bracket surface 6 on the bottom wall 4 side is also used as the bottom wall 4, but it may be separate.

In addition, there is a through hole 8 in the center of the bracket surface 5 on the opening side.
However, there is a blind hole 9 in the center of the bracket surface 6 on the bottom wall 4 side.
are drilled in each case, and a screw 10 inserted from the opening side and extending horizontally bridges the through hole 8 and the blind hole 9.

Reference numeral 11 denotes a locking piece, which is formed by folding the strip into three parts and forming an outwardly convex roof-like bending part bridging the upper ends of the two base parts 13 and 14 and the pair of opposing base parts 13 and 14, as shown in FIG. 12 and is formed into a house shape. Reinforcing pieces 15 . . . 15 are provided at the side ends of the bending portion 12 and both base portions 13 and 14 of the locking piece 11, respectively, protruding approximately at right angles.

Furthermore, an insertion hole 16 is provided in the center of one base 13 of the locking piece 11, and a screw hole 17 is provided in the center of the other base 14. Note that if the other base portion 14 is too thin to be threaded, a hole may be made in the base portion 14 and a nut may be attached thereto.

Then, with the bending part 12 facing outward, one base 13
The locking pieces 11, 11 are inserted into the receiving chambers 7, 7, respectively, with the other base 14 facing the bracket surface 5 and the bracket surface 6, respectively. Next, the screw 10 is inserted through the through hole 8 of the bracket surface 5 and the insertion hole 16 of the base 13, and then through the screw hole 17 of the base 14 and inserted into the blind hole 9 of the bracket surface 6, and the locking piece is inserted into the blind hole 9 of the bracket surface 6. 11,
11 is attached to the buried box body 1 to form a wiring buried box 20.

Thus, when the screw 10 is rotated, the screw 1
Of the through hole 8, the insertion hole 16, the screw hole 17, and the blind hole 9 through which the screw 0 was inserted, only the screw hole 17 is screwed together, and the locking piece 11 tries to rotate through the base 14. ,
It is restricted by the receiving chamber 7 and cannot be rotated, and only the base 14 provided with the screw hole 17 moves back and forth along the screw 10.

That is, by rotating the screw 10, the separation distance d between the base parts 13 and 14 is increased or decreased, and when the distance d is short, the bending part 12 becomes an acute angle as shown in FIG.
The projecting length h of the bending portion 12 becomes longer. Further, when the separation distance d is long, the bent portion 12 becomes an obtuse angle as shown in FIG. 7, and the overhang length h of the bent portion 12 is
becomes shorter.

Furthermore, the extension length h of the bending portion 12 of both the locking pieces 11, 11 is independently variable, and the variable range is calculated to be approximately 1/2 of the maximum value of the separation distance d. In other words, when the separation distance d is maximum and the bent and stretched portion 12 is formed at an obtuse angle close to a straight line,
When the overhang length h is approximately 0 and the separation distance d is 0, the bending portion 12 is folded in half, and the overhang length h becomes approximately 1/2 of the maximum value of the separation distance d, as shown in FIG. Generally, the variable range can be larger than that of the conventional example shown.

In the embodiment, in order to make the locking piece 11 easy to bend, expand and contract, the locking piece 11 is formed of a thin plate.
Further, reinforcing pieces 15...15 are provided at both ends of the locking piece 11, but the reinforcing pieces 15 are not required if there is no problem in terms of strength.

Then, insert the embedded wiring box 20 into the recess 21 that is larger than the embedded box 20 provided in the main body A, and turn the screws 10, 10 to remove the bending parts 12, 12.
When it is pushed out and pressed against the inner wall of the recess 21, it is self-fixed as shown in FIG.

As shown in FIG. 9, an undercut recess 22 provided on the inner surface of the box recess 21 of the body A
When this is combined with the embedding box 20 according to this invention, the embedding box 20 can be fixed even more effectively.

Further, when the box recess 21 is formed at an angle as shown in FIG.
The embedded box 20 can be fixed in an upright state by changing the length of the overhang of the box 11.

As mentioned above, the embedded box for wiring according to this invention has the locking pieces 11 independently on both side walls 2, 2 of the embedded box main body 1, and each locking piece 1
Since the overhang length h of 1 and 11 can be greatly varied, it is a convenient item that can be easily fixed even if the box recess 21 provided in the concrete body A is tilted or the molding accuracy of the box recess 21 is a little rough. It is.

In the illustrated example, a bracket for attaching the locking piece is provided inside the embeddable box body, but the same effect can be expected even if the bracket is provided outside the embeddable box body. Also, the bending part is
Any type of material, such as a shaped roof, that can be bent and stretched by the movement of both bases may be used.

[Brief explanation of drawings]

FIG. 1 is an overall partially cutaway perspective view showing a conventional buried wiring box. 2 to 10 show an embodiment of the embedded wiring box according to this invention, FIG. 2 is a perspective view of the entire box as seen from the front, and FIG. 3 is a diagram of the main body of the embedded box. Fig. 2 is a corresponding view, Fig. 4 is an end view cut along the - line of Fig. 3,
FIG. 5 is a perspective view of the locking piece, FIGS. 6 and 7 are schematic cutaway plan views of the main parts showing the action of the locking piece, FIG. 8 is a schematic cutaway plan view of the locking piece in the state of use, and FIG. FIG. 8 is a diagram corresponding to a modified example of the recess for a box, and FIG. 10 is a schematic front view showing a state in which a buried wiring box is used in another modified example of the recess for a box. 1...Recessed box body, 2...Side wall, 3...
Bracket, 10... Screw, 1... Locking piece, 12
... bending part, 13 ... base, 14 ... base, 16
...Insertion hole, 17...Threaded hole.

Claims (1)

[Scope of utility model registration request] In a buried box for wiring that is used by being inserted and fixed into a recess opened in a building frame, brackets for attaching locking pieces are provided on both sides of the buried box body, and in addition to this, a pair of bases facing each other and both bases are provided. A locking piece consisting of an outwardly convex bent portion bridging the upper end is arranged on both brackets, and an insertion hole provided in one base of the locking piece and a screw hole provided in the other base are connected to each other. A wiring embedding device characterized in that a screw to be inserted is installed in a bracket, a locking piece is attached, and the distance between the two bases is changed by rotating the screw, so that the overhang length of the bending portion can be freely adjusted. Including box.