JP2606319Y2 - Jig for mounting electric box on PC formwork - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for mounting an electric box on a PC formwork.

[0002]

2. Description of the Related Art Conventionally, in order to mount an electric box on a PC form, as shown in FIG. 5, a screw hole b "provided in an electric box B is used to attach it to a peripheral form (not shown). The electric box B was mounted on the erected mounting plate 5 with screws 7 while lifting the electric box B.

[0003] However, in the mounting method using the screw hole b ", when the concrete is finished after the screw 7 is removed, the screw hole b" becomes unusable due to the sticking of the screw hole b "or the concrete adheres to the screw 7 when the concrete is attached to the screw 7. There were problems such as difficulty in removal.

[0006] Conventionally, as shown in FIG. 6, there has been a method in which a stopper 8 is attached to the lower side of the electric box B to support the electric box B on a bed 9.

[0005] However, the supporting method using the stopper 8 has a problem in that the length of the legs 8a must be changed every time the concrete thickness changes, and it takes time and effort to arrange parts. .

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional problems. The purpose of the present invention is to make it possible to set an electric box reliably and quickly, and to make concrete concrete. It is an object of the present invention to provide a jig for attaching an electric box to a PC formwork that can be easily attached even if the thickness changes.

[0007]

A jig for mounting an electric box on a PC formwork according to the present invention is formed on a central portion of a hook portion which is implanted on an upper surface of a jig body and has a hook at a tip end. A lifting jig comprising: And A blade is provided on the jig body.
A projection is formed on the jig body so as to be fitted into a recess formed on the bottom of the electric box.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, A is a superimposed lifting jig, which includes a jig body 1, a hook 2, and a female screw 3.
And the wings 4.

The jig body 1 is formed in a flat plate shape, and a hook 2 is planted on its upper surface. The hook 2
A hook 2a elastically hooked to the edge of the knock hole b made in the electric box B and protruding outward;
A slant surface 2b is formed on the tip end surface of the hook 2a. At least two hook portions 2 are formed.

The female screw portion 3 is formed in a projecting portion 3 'projecting downward at the center of the jig main body 1, and is opened on the upper surface (on the side of the hook portion 2).

A plurality of (four in this embodiment) blades 4 are formed radially outside the projection 3 '.

[0012] The superimposed lifting jig A of the present embodiment is constructed as described above.
In order to attach the hook 2a to the PC formwork, as shown by an arrow in FIG. 1, the hook 2a is inserted from below into a knock hole b punched out from the bottom of the electric box B, and the hook 2a is inserted as shown in FIG. Hang it on the edge of the knock hole b.

Next, a lifting bolt 6 is inserted into a mounting plate 5 provided on a PC frame (not shown), and its tip is screwed into the female screw portion 3 of the upper lifting jig A.

Subsequently, as shown in FIG. 3, a nut 6a screwed to the lifting bolt 6 is tightened to
Is fixed to the lower surface of the mounting plate 5, and concrete is poured.

After the concrete is hardened, as shown in FIG.
The above-mentioned lifting bolt 6 is attached to the female screw portion 3 of the lifting jig A.
Remove from the mold.

As shown in FIG. 1, a projection 1a is formed on the upper lifting jig A and fitted into a recess b 'formed on the bottom surface of the electric box B. When the lifting bolt 6 is tightened, The lifting jig A is prevented from rotating.

[0017]

[Effects of the Invention] 1) An upper lifting jig composed of a hooking part which is planted on the upper surface of the jig body and has a hook at the tip, and a female screw part formed at the center; A lifting bolt that is screwed into the female screw portion and is lifted and fixed to a mounting plate installed on the PC formwork; therefore, there is no danger that the screw hole of the electric box will be unusable.
It can easily respond to changes in concrete thickness. 2) Providing the blade portion on the jig body not only serves as a knob when the lifting bolt is screwed into the female screw portion of the upper lifting jig, but also releases the screw when releasing the screwing. The tool body can be prevented from rotating around and can function as a stud bolt after being buried in concrete. 3) Since a projection is formed on the jig main body so as to fit into a recess formed on the bottom of the electric box, it is possible to prevent the jig from rotating when the lifting bolt is removed.

[Brief description of the drawings]

FIG. 1 is an explanatory view in which a jig is attached to a box.

FIG. 2 is an explanatory view of trying to screw a bolt into a jig.

FIG. 3 is an explanatory diagram in which a box is set on a plate.

FIG. 4 is an explanatory diagram of a detached state.

FIG. 5 is an explanatory diagram showing a conventional setting method.

FIG. 6 is an explanatory diagram of another conventional setting method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Jig main body 2 Hook part 2a Hook 2b Slope 3 Female screw part 3 'Projection part 4 Blade part 5 Mounting plate 6 Lifting bolt A Upper lifting jig B Electric box b Dowel hole b' recess

Claims (3)

(57) [Scope of request for utility model registration] 1. An upper lifting jig comprising: a hook portion implanted on the upper surface of a jig main body and having a hook at a tip thereof; and a female screw portion formed at a central portion; A lifting bolt which is screwed into the screw portion and which is lifted and fixed to a mounting plate provided on the PC formwork; and a jig for mounting the electric box on the PC formwork. 2. The jig for attaching an electric box to a PC form according to claim 1, wherein a blade portion is provided on the jig body. 3. The PC mold according to claim 1, wherein a projection is formed on the jig body so as to fit into a recess formed in a bottom of the electric box. Jig for mounting the box.