JPH0739599Y2 - Drilling jig - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hole making jig used for making holes in a base material covering a wiring box.

[0002]

2. Description of the Related Art In building a building, when a switch, outlet, antenna box, or other wiring box fixed to a through plate is covered with a base material for an inner wall made of gypsum board, plywood, etc. It is necessary to make holes corresponding to the openings of the wiring box in the base material.

When forming a hole, the center of the wiring box is drawn on the floor in advance before the wiring box is covered with the base material, and the height from the floor to the center of the wiring box is entered near the line. Then, after attaching the base material, extend the line drawn on the floor upward and draw a vertical line on the base material, then draw a horizontal line on the base material according to the height dimension entered on the floor surface, With the intersection of the horizontal lines as the center of the hole, cut around this center with a blade or saw blade according to the shape of the opening of the wiring box.

[0004]

However, according to the method as described above, it takes time and labor, and the drilling position is displaced due to the inclination of the vertical line drawn on the base material or the misreading of the dimension when drawing the horizontal line. There was an occasion.

Further, since the hole is manually formed, it is difficult to form a hole having the same shape as the opening of the wiring box.

[0006] Therefore, an object of the present invention is to provide a hole forming jig capable of forming a hole in a base material accurately corresponding to an opening of a wiring box.

[0007]

In order to solve the above-mentioned problems, the present invention comprises a plate-shaped body screwed to a wiring box and a screw shaft screwed into the plate-shaped body. A pair of screw insertion holes, through which the screws are inserted, are provided at both ends of the screw in accordance with the distance between the pair of screw holes provided in the wiring box, and the screw shaft is provided at a bisected position between these screw insertion holes. A screw hole to be screwed is provided, and a tapered piercing portion that can penetrate a base material that covers the wiring box is formed at the tip of the screw shaft.

[0008]

In order to make a hole in the base material by using the hole making jig according to the present invention, a screw is inserted through the screw insertion hole provided in the plate-like member, and the screw is fixed to the through plate or the like. Attach the plate to the wiring box by screwing it into the screw hole of the wiring box. The base of the screw shaft is screwed into the screw hole of the plate in advance.

Next, the wiring box is covered with a base material, the base material is driven into the piercing portion of the screw shaft, and the piercing portion is penetrated through the base material.

Then, the screw shaft is extracted from the front surface side of the base material, and the base material is centered around the through hole formed in the base material after the screw shaft is extracted, and the base material is formed by a punching tool in accordance with the shape of the opening of the wiring box. Cut in.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the punching jig according to the present invention comprises a plate-shaped body 1 attached to a wiring box 51 with screws 55, and a screw shaft 2 screwed into the plate-shaped body 1. The wiring box 51 is fixed to the through plate 61 with nails 62.

An opening 52 is provided on the front surface of the wiring box 51, and a pair of projecting pieces 53 is formed on the opposite opening edges of the opening 52. Each of the protrusions 53 has the screw 55.
A screw hole 54 into which is screwed is provided.

A pair of screw insertion holes 3 and 3 are provided at both ends of the plate-like body 2. The distance between the screw insertion holes 3 and 3 is equal to the distance between the screw holes 54 and 54.
A screw hole 4 into which the screw shaft 2 is screwed is provided at a bisected position between the screw insertion holes 3 and 3 of the plate body 1. A tapered piercing portion 5 is formed at the tip of the screw shaft 2 so as to penetrate the base material B that covers the wiring box 51.

The punching jig is used with the punching tool shown in FIGS. 3 to 5. This punch is a grip 1
A drive shaft 13 driven by a motor housed in the case 12 is provided at the tip of a case 12 having a slider 1. A slider 14 is provided on the drive shaft 13 so as to be movable back and forth and provided at four corners of the slider 14. An endless chain 17 having a plurality of blades 16 is hung between the four sprockets 15 thus formed, and the rotation of the drive shaft 13 is rotated by the sprocket 1.
5, the blade 16 is caused to travel together with the chain 17.

The slider 14 is housed in a cover 18 having an open front surface, and moves forward and backward with the operation of a lever 19 provided at the rear portion of the cover 18. Drive shaft 13 and blade 16
The front end portion of the is protruding forward from the cover 18. Cutlery 1
The travel locus of 6 is almost the same as the shape of the opening 52 of the wiring box 51.

In order to make a hole in the base material B using the hole making jig and the hole making tool as described above, the screw 55 is inserted through the screw insertion hole 3 provided in the plate-shaped body 1, and the screw 55 is formed. The plate-shaped body 1 is attached to the wiring box 51 by screwing into the screw hole 54 of the wiring box 51. The base of the screw shaft 2 is previously screwed into the screw hole 4 of the plate-shaped body 1.

Next, the wiring box 51 is covered with the base material B, and the base material B is driven into the piercing portion 5 of the screw shaft 2,
The piercing part 5 is penetrated through the base material B.

Then, the screw shaft 2 is extracted from the surface side of the base material B, and as shown in FIG. 5, the drive shaft 1 of the punching tool is formed in the through hole b formed in the base material B after the screw shaft 2 is extracted.
Insert the tip of No. 3 and press the opening edge of the front surface of the cover 18 against the base material B.

In this state, the drive shaft 3 is rotated by the motor to drive the blade 6, and the lever 9 is operated to move the slider 4 forward to cut the base material B. As shown in FIG. A hole C having substantially the same shape as the opening 52 of the wiring box 51 is visible in B.

After the hole C is opened, the punching tool is separated from the base material B, and the scrap remains in the cover 18. The scrap is further advanced by moving the slider 14 forward. Can be released from.

Further, as shown in the figure, a pin 19 is provided on the front surface of the slider 14, the pin 19 is penetrated through the base material B, and the tip end of the pin 19 is formed in the through hole 6 formed in the plate-shaped body 1. When engaged, rotation of the punching tool with respect to the base material B can be prevented.

After opening the hole C, the plate-shaped body 1 is removed from the wiring box 51. The plate-shaped body 1 and the screw shaft 2 can be reused.

[0023]

[Effect] According to the present invention, as described above, the screw shaft is screwed into the plate-like body attached to the wiring box, and the tapered piercing portion is formed at the tip of the screw shaft.
When covering the wiring box with the base material, the piercing part is penetrated into the base material, the screw shaft is extracted from the surface side of the base material, and the hole is formed around the through hole formed in the base material after extracting the screw shaft. By cutting the base material in accordance with the shape of the opening of the wiring box, it is possible to form a hole in the base material that accurately corresponds to the opening of the wiring box.

[Brief description of drawings]

FIG. 1 is a perspective view of a drilling jig according to the present invention.

FIG. 2 is a vertical sectional side view showing the same usage state as above.

FIG. 3 is a perspective view of a punching tool.

FIG. 4 is a partially cutaway perspective view showing an essential part of the above.

FIG. 5 is a vertical sectional side view showing a drilling work state.

FIG. 6 is a vertical sectional side view showing a completed state of drilling.

[Explanation of symbols]

 1 plate-like body 2 screw shaft 3 screw insertion hole 4 screw hole 5 piercing part 51 wiring box B base material

Claims (1)

[Scope of utility model registration request] 1. A plate-shaped body screwed to a wiring box, and a screw shaft screwed into the plate-shaped body. A pair of screw holes provided in the wiring box are provided at both ends of the plate-shaped body. A pair of screw insertion holes, through which the screws are inserted according to the intervals, are provided, screw holes into which the screw shaft is screwed are provided at bisected positions between these screw insertion holes, and a wiring is provided at the tip of the screw shaft. A drilling jig with a tapered piercing part that can penetrate the base material that covers the box.