JP2606320Y2 - Jigs for mounting inserts of electric boxes for hanging appliances - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric box for suspending an electric appliance such as a lighting fixture from a ceiling, and to a jig for inserting an electric box into a concrete slab.

[0002]

2. Description of the Related Art Conventionally, in order to attach an insert to an electric box of this type, an insert 6 set in an electric box B is tightened from the inside of the box B with a nut 7 as shown in FIG.

[0003] However, the conventional mounting method described above is
Not only the noro curing of the electric box becomes post-processing,
Since an insert having a shape bonded to the electric box body is used, there is a problem that it is difficult to secure strength depending on the type of the electric box.

[0004] Conventionally, as shown in FIG. 6, a metal insert 8 is fastened and fixed by a screw 10 from inside the electric box B.

[0005] However, this setting method also has a problem that the stiffening of the electric box is post-processed and the edge of the knock hole of the electric box B is sandwiched between the plates 9 for mounting. There was a point.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. The purpose of the present invention is to make it possible to easily set an insert from the outside of an electric box. An object of the present invention is to provide a jig for attaching an insert of an electric box for hanging an instrument, which is not influenced by a wall thickness which varies depending on a type of an electric box and which can secure the mounting strength of the electric box.

[0007]

According to the present invention, a jig for mounting an insert of an electric box for suspending a device according to the present invention includes a male screw portion,
A hook having a hook at a tip thereof, a jig body including an insert fitting portion; a cap having a female screw portion screwed into the male screw portion; and an insert fitted into the insert fitting portion. It is characterized by having. The insert is made of metal.

[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, reference numeral A denotes a jig main body, which includes a male screw portion 1, a hook portion 2, and an insert fitting portion 3.

The male screw portion 1 has a female screw 4 a inside.
Is formed, and the cap 4 is screwed. The hook 2 includes a hook 2a protruding outward so as to be elastically hooked to an edge of a knock hole b formed in the electric box B (see FIG. 3). Slope 2 sloping at the tip
b is formed. At least two hook portions 2 are formed.

Next, as shown in FIG. 2, a metal insert 5 is fitted from above into the insert fitting portion 3 of the jig body A to which the cap 4 is screwed.

Subsequently, as shown in FIG. 3, the hook 2a is inserted from above into the knock hole b formed by punching the bottom of the electric box B, and the hook 2a is inserted into the knock hole b as shown in FIG.
Hook on the rim. D is a bed for manufacturing a PC board.

The cap 4 is rotated in the reverse direction to bring the cap 4 into close contact with the electric box B and tighten and fix it.
Concrete is cast and a PC (precast concrete) board is manufactured. The electric box B, the jig body A, and the metal insert 5 are embedded in concrete of a PC board. However, the inner surface of the electric box B is exposed.

[0013]

[Effect of the Invention] 1) Since the jig body is configured to be fastened and fixed from the outside of the electric box, the insert can be easily and reliably mounted. Curing can be performed in advance. 2) When it is set on a bed for manufacturing PC boards, it is not affected by the wall thickness, which varies depending on the type of electric box.
The jig body can be easily and securely fixed to the electric box. 3) The mounting strength of the electric box can be ensured by the metal insert.

[Brief description of the drawings]

FIG. 1 is an explanatory view of assembling a jig main body and a cap.

FIG. 2 is an explanatory view of fitting of an insert.

FIG. 3 is an explanatory diagram of a work of setting an insert into an electric box.

FIG. 4 is a view showing a state in which an insert is set in an electric box.

FIG. 5 is an explanatory view of a conventional mounting method.

FIG. 6 is an explanatory view of another conventional mounting method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Screw part 2 Hook part 2a Hook 2b Slope 3 Insert fitting part 4 Cap 4a Female screw part 5 Metal cap A Jig body B Electric box D Bed

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02G 3/20 F21V 21/04 H02G 3/12

Claims (2)

(57) [Scope of request for utility model registration] An external thread portion, a hook portion having a hook at a tip thereof, a jig body including an insert fitting portion; a cap having an internal thread portion screwed into the male thread portion; An insert mounting jig for an electric box for hanging an appliance, comprising an insert fitted into a joint portion. 2. The jig for mounting an insert of an electric box for hanging an appliance according to claim 1, wherein the insert is made of metal.