JPH11234853A - Fastening jig for electric wiring box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a fastening jig for an electric wiring box, wherein the electric wiring box is prevented from floating from the fastening jig after its installation on the fastening jig, naturally eliminating concrete paste from penetrating the fastening jig, when concrete is placed in a molding frame, and the fastening jig is very simple to attach to and detach from the molding frame being suitable for its repeated usage. SOLUTION: In a fastening jig for fastening thereto an electric wiring box class, holding it on the inner surface of a molding frame 11, the electric wiring box is fitted into its outer surface and attached to it to place thereafter concrete in the molding frame 11. In this case, making a fastening jig main body 1 of magnetic bodies 6 and attracting it adhesively to the inner surface of the molding frame 11 by the magnetic forces of the magnetic bodies 6, the electric wiring box is fixedly pushed in thereafter into its wall surface, establishing escape prevention to the box.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for holding an electric wiring box in a mold by fixing the electric wiring box to the formwork, mounting the electric wiring box, and then pouring concrete into the formwork. Fixing jig for electric wiring boxes for use.

[0002]

2. Description of the Related Art Conventionally, an electric wiring box is fixed to a formwork, fitted with an electric wiring box on an outer surface of a fixing jig and attached, and then concrete is poured into the formwork to form an electric wiring box or the like inside the formwork. The following four types of mechanisms have been employed as jigs for fixing electric wiring boxes for holding the electric wires.

A) An electric wiring box fixing device is fixed to one surface of a formwork, and an outer surface of the electric wiring box fitted into the electric wiring box fixing device is pressed by a reinforcing bar.

B) A metal or at least a part of a metal elastic wiring box fixing device made of metal is fixed to one surface of a formwork by spot welding or the like, and the electric wiring box fixing device is fixed to the electric wiring box fixing device. That are held by press-fitting.

C) As shown in FIG. 11 and FIG. 12, an electric wiring box fixture 2 made of an elastic body and provided with a bolt hole 22.
1 is fixed to one surface of a formwork 26 with bolts 23 and nuts 24, and is held by pressing the electric wiring boxes 25 into the electric wiring box fixing tool 21.

[0006] d) An electric wiring box is fixed by directly fixing it to a mold with a double-sided tape or the like without using an electric wiring box fixing device.

[0007]

However, in the mechanism of the jig for fixing the electric wiring boxes, a) The electric wiring boxes are easily lifted up by means of a reinforcing bar, and the concrete swarf easily enters when concrete is poured. .

A large number of man-hours are required to hold the electric wiring boxes with the reinforcing bars, and there is also a problem in accuracy. b) In the case of fixing the electric wiring box fixtures directly to the formwork by spot welding, remove the welding and clean the formwork surface each time the position of the product is moved, and return to the changed position. Must be fixed by spot welding. And since the above operation | work is performed repeatedly, a formwork is very easy to be damaged. In addition, the work of changing the position takes a lot of trouble.

[0009] When the electric wiring box fixing device is made of metal, there is a problem in that there is a problem in the adhesion to the electric wiring boxes made of plastic, so that mounting failure occurs or mounting accuracy is poor. Therefore, there is a high danger that the concrete slag easily invades and lowers the quality of the product. c) In the case where the electric wiring box fixing device is held in the form via bolts and nuts, similarly, the concrete swarf easily penetrates, and there is a high risk of deteriorating the quality of the product. In addition, a bolt hole is opened in the formwork, and it is necessary to work to fill the hole. d) In the case where the electric wiring box fixing device is directly fixed to the formwork with a double-sided tape or the like, the electric wiring box fixing device and the electric wiring box are held only by the adhesive force of the double-sided tape. However, the position is displaced by a small external force, and the concrete swarf is apt to enter.

An electric wiring box fixing jig according to the present invention is intended to solve the above-mentioned drawbacks of the conventional example. The electric wiring box does not rise after installation, and concrete swarf intrudes when concrete is poured. An object of the present invention is to provide a fixing jig for an electric wiring box which is very easy to be attached to and detached from a formwork and is suitable for repeated use without damaging the formwork.

[0011]

That is, the jig for fixing electric wiring boxes of the present invention is held by a formwork, and after fitting the electric wiring boxes on the outer surface thereof, concrete is poured into the formwork. By fixing the electric jig body to the electric jig box, the electric jig main body is made of a magnetic material. It is characterized in that the electric wiring boxes are pressed into the wall surface of the fixing jig body and fixed thereto after being attracted to the metal surface.

[0012] The electric wiring box fixing jig of the present invention is held by a mold, and after fitting the electric wiring box to the outer surface and mounting the concrete, the concrete is poured into the mold to form the jig. Fixing jig for electric wiring boxes for holding electric wiring boxes, the fixing jig main body is made of an elastic body with a built-in magnet, and this fixing jig main body is fixed to the metal surface of the formwork with a magnet. In addition to the suction, electric wiring boxes are pressed into the wall surface of the fixing jig body and fixed.

In the fixing jig for electric wiring boxes and the like according to the present invention, the fixing jig main body includes a magnet and a separating metal fitting, and a separating bolt is screwed into a female screw provided on the separating metal fitting. It is also characterized in that the fixing jig body is separated from the mold by pressing the mold with the tip.

The fixing jig for electric wiring boxes and the like according to the present invention is also characterized in that the fixing jig body is made of an elastic body containing a magnet and a separating metal.

The fixing jig for electric wiring boxes and the like according to the present invention is characterized in that the fixing jig main body has a magnet built in along the outer periphery of a surface of the mold that is attracted to the metal surface.

According to the jig for fixing electric wiring boxes of the present invention, the electric wiring boxes do not rise after installation and concrete slag does not enter when concrete is poured. It is possible to provide an electric wiring box fixing jig which is very easy to remove and suitable for repeated use.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a fixing jig for electric wiring boxes according to the present invention.

FIGS. 1 to 7 show one embodiment of a fixing jig for electric wiring boxes and the like according to the present invention.
Is a perspective view thereof, FIG. 2 is a plan view thereof, FIG. 3 is a perspective view showing a state where separation bolts are attached, FIG. 4 is a cross-sectional view showing a state where it is attached to a mold, and FIG. FIG. 6 is a cross-sectional view showing a state in which the electrical wiring boxes are removed from the mold after the concrete is cast, and a separation bolt is to be mounted to remove the fixing jig of the electrical wiring boxes from the mold. FIG. 7 is a cross-sectional view showing a state where the fixing jigs of the electric wiring boxes are removed from the mold.

In FIG. 1 to FIG. 4, reference numeral 1 denotes a fixing jig body made of an elastic body, which has a substantially rectangular thick plate shape, and has female members at both ends in the longitudinal direction of the plate surface in accordance with the internal structure of electric wiring boxes. A notch 2 for accommodating the screw seat and a step 3 are formed along the outer periphery. At substantially the center of the board surface, a bolt hole 4 into which the separation bolts 5 are inserted is formed so as to penetrate in the thickness direction.

A magnet 6 is built in the fixing jig main body 1 made of the elastic body. In the figure, a pair of the magnets 6 are incorporated at predetermined intervals on both sides in the length direction of the fixing jig body 1. Further, inside the fixing jig body 1, a metal plate separating metal fitting 7 is incorporated so as to be located between the pair of magnets 6. A female screw 8 is formed substantially at the center of the metal fitting 7 at a position corresponding to the bolt hole 4 so that the separating bolts 5 can be attached as shown in FIG.

As shown in FIG. 4, the fixing jig main body 1 is used by being attracted to the inner surface of a mold 11 by a magnet 6.

FIG. 5 shows a side wall of the fixing jig body 1.
As described above, rectangular plastic electric wiring boxes 9 are press-fitted by utilizing the elasticity of the fixing jig body 1.
Of course, the inner diameter of the electric wiring boxes 9 is formed so as to substantially match the outer diameter of the fixing jig main body 1, so that the electric wiring boxes 9 can be securely fitted into the fixing jig main body 1.

At this time, since the magnet 6 having a very strong magnetic force is used, the electric wiring boxes 9 are securely held by the mold 11 together with the fixing jig main body 1, and are easily subjected to vibration or the like. It does not come off.

When the PC board in which the electric wiring boxes 9 are embedded is removed from the mold 11 at the stage where the concrete placement and curing have been completed, the fixing jig body 1 is easily elasticized from the electric wiring boxes 9 due to its elasticity. Can be extracted.
Thus, the fixing jig main body 1 can be pulled out from the electric wiring boxes 9 without damaging the electric wiring boxes 9.

Next, the fixing jig main body 1 from which the electric wiring boxes 9 are removed is mounted with the separation bolt 5 in the bolt hole 4 as shown in FIG. The separation bolt 5 can be removed from the mold 11 by screwing. That is, by pressing the inner surface of the mold 11 with the tip of the separation bolts 5 as shown in FIG. 7, the fixing jig body 1 can be easily separated from the inner surface of the mold 11 against the magnetic force of the magnet 6. .

8 to 10 show another embodiment of the fixing jig for electric wiring boxes of the present invention. The basic shape of the fixing jig main body 1 and the arrangement of the bolt holes 4 are the same as those of the above embodiment. Almost identical. In the embodiment of FIG. 8, the fixing jig main body 1 is formed in a substantially square shape, and the magnet 6 is formed along the outer periphery of the board surface of the fixing jig main body 1. Also in this embodiment, the method of attaching the fixing jig of the electric wiring boxes to the mold and the method of removing the jig from the mold are the same as those in the above embodiment.

Next, in the embodiment shown in FIGS. 9A and 9B, the fixing jig body 1 is formed in a substantially disk shape, and the magnet 6 is formed along the outer periphery of the board surface of the fixing jig body 1. Have been.
Of course, how to attach the fixing jig to the mold and how to remove the electric wiring box from the mold are the same as in the above embodiment.

Next, in the embodiment shown in FIGS.
The fixing jig main body 1 is formed in a substantially disk shape, and a magnet 6 is formed along the outer periphery of the board surface of the fixing jig main body 1. Needless to say, how to fix the electric wiring boxes to the mold and how to remove the electric wiring boxes from the mold are the same as those in the above embodiments.

In each of the above embodiments, the shape and thickness of the fixing jig main body 1 and the type of the elastic material are determined by the ease of setting the electric wiring boxes on the fixing jig main body and the fixing strength (concrete strength). It can be determined as appropriate for each electric wiring box in consideration of the adhesion strength that does not cause slag).

The shape, structure, arrangement, etc. of magnets such as permanent magnets and / or separation metal fittings incorporated in each fixing jig main body are easy to set electric wiring boxes on the fixing jig main body. The strength can be determined as appropriate for each electric wiring box in consideration of the fixing strength (adhesion strength that does not allow the concrete to enter), ease of removal, and the like.

[0031]

According to the jig for fixing electric wiring boxes of the present invention, the electric wiring boxes do not rise after installation, and concrete slag does not enter when concrete is poured. It has become possible to provide a fixing jig for electric wiring boxes and the like, which is very easy to attach to and detach from the electric wiring box and is suitable for repeated use.

Further, since the formwork is not damaged during use, it can be used repeatedly for a long period of time, and the positioning can be performed easily and accurately, and even immediately before the concrete is cast, so that very high quality can be achieved. A PC board on which good electric wiring boxes are set can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a fixing jig for electric wiring boxes according to the present invention.

FIG. 2 is a plan view thereof.

FIG. 3 is a perspective view showing a state where separation bolts are attached.

FIG. 4 is a cross-sectional view showing a state of being attached to a mold.

FIG. 5 is a cross-sectional view showing a state where electric wiring boxes are mounted.

FIG. 6 is a cross-sectional view showing a state in which the electric wiring boxes are removed after the concrete is cast, and separation bolts are to be mounted in order to further remove the fixing jig of the electric wiring boxes from the mold.

FIG. 7 is a cross-sectional view showing a state in which a fixing jig of an electric wiring box or the like has been removed from a mold.

FIG. 8 is a plan view showing another embodiment of the fixing jig for electric wiring boxes of the present invention.

FIG. 9 shows another embodiment, (a) is a plan view,
(B) is a sectional view.

FIG. 10 shows still another embodiment, (a) is a plan view,
(B) is a sectional view.

FIG. 11 is a plan view of a conventional example.

FIG. 12 is a sectional view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixing jig main body 2 Notch 3 Step 4 Bolt hole 5 Separation bolts 6 Magnet 7 Separation bracket 8 Female screw 9 Electric wiring box 11 Formwork 21 Fixing jig main body 22 Bolt hole 23 Bolt 24 Nut 25 Electric wiring box Class 26 Formwork

Claims (5)

[Claims] 1. An electric wiring box for holding an electric wiring box in a mold by holding the electric wiring box in an outer surface thereof and attaching the electric wiring box to the concrete. A fixing jig for a wiring box, wherein the fixing jig main body is made of a magnetic material, and the fixing jig main body is attracted to a metal surface of a form by a magnetic force, and an electric wiring box or the like is attached to a wall surface of the fixing jig main body. Jig for fixing electric wiring boxes, which is press-fitted and fixed. 2. An electric device for holding the electric wiring boxes in the form by holding the electric wiring boxes in the form, fitting the electric wiring boxes to the outer surface and mounting the concrete in the form. Fixing jig for wiring boxes, etc., the fixing jig body is made of an elastic body with a built-in magnet, and this fixing jig body is attracted to the metal surface of the formwork with a magnet, and then fixed to the wall surface of the fixing jig body. A fixing jig for an electric wiring box, wherein the electric wiring box is press-fitted and fixed. 3. The fixing jig main body contains a magnet and a separating metal fitting, and separate bolts are screwed into female screws provided on the separating metal fitting, and the mold is pressed at its tip to fix the fixing jig. The fixing jig for an electric wiring box according to claim 1 or 2, wherein the fixture main body is separated from the mold. 4. The fixing jig for an electric wiring box according to claim 1, wherein the fixing jig body is made of an elastic body containing a magnet and a separating metal. 5. The fixing jig for an electric wiring box according to claim 1, wherein the fixing jig main body has a magnet built therein along an outer periphery of a surface that is attracted to a metal surface of the formwork. .