JPH0698607B2 - Piercing tool - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a perforating tool for perforating a base material such as gypsum board or plywood.

[0002]

2. Description of the Related Art When a building is constructed, a box on the floor is covered with a plasterboard or plywood that is attached to a wiring box such as a switch, an outlet, or an antenna terminal, which is attached by nailing to a board. Draw the center position of the box and write the height from the floor to the center of the box in the drawn area.

[0003] Next, when an electric worker makes a hole in the base material so as to match the opening of the box, first, a line drawn on the floor is extended upward to form a vertical line in the base material, and the base material is also made. Insert a horizontal line of the height dimension marked on the floor, and deepen the position so that the intersection of the vertical line and the horizontal line becomes the center of the box.

Then, by cutting with a knife or a saw blade around the center that is deepened, a hole matching the opening of the box is made.

[0005]

When the above-mentioned method is adopted, a line is drawn and a dimension is written on the floor, and the center of the box is deepened in the base material according to the line drawn and the size of the floor. was there.

Further, since the holes are formed manually, it is inefficient and it takes time to form the holes having the same shape as the box opening.

SUMMARY OF THE INVENTION An object of the present invention is to provide a punching tool which can punch a hole having the same shape as an opening of a box extremely quickly.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a drive provided so as to project forward from the tip of a case with a grip and to be rotated by the operation of a motor installed in the case. A shaft, a slider penetrating through the drive shaft so as to rotate freely and moving forward against an applied backward return force by operating a lever; and a rotation stopping device provided to stop the rotation of the slider. An endless running belt provided so as to run along the opening edge of the embedded box around the front surface of the slider, a blade provided so as to project forward from the running belt, and the running belt from the drive shaft. It employs a punching tool composed of a transmission device provided to transmit the traveling to the vehicle.

[0009]

After the drive shaft is inserted through the through hole of the attached base material, the slider is moved forward by operating the lever, the blade of the traveling band is pressed against the surface of the base material, and the drive shaft travels through the transmission device. Make a hole while cutting the base material with the blade of the running belt.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 4, a drive shaft 3 is provided at the front end of the case 2 with the grip 1 and which projects forward and is rotated by the operation of a motor 2 ^′ incorporated in the case 2. There is.

In the above-mentioned motor 2 ^' , a cord (not shown) is connected to a battery or a power source housed in the case 2,
It is designed to drive when the switch is turned on.

Reference numeral 4 denotes a slider having the drive shaft 3 freely passed through the center thereof. In the illustrated case, the slider 4 has the same shape as the opening 52 of the box 51, and has two plate-like bodies 5 that oppose each other with a predetermined distance in the front and back, and the two plate-like bodies 5.
It is composed of a spacer 6 that is interposed between and has an end fixed to the plate-like body 5.

Further, the slider 4 is moved forward by the operation of the lever 7 against the backward returning force.

The mounting of the lever 7 and the restoring force applied to the slider 4 cause the drive shaft 3 to move by a bearing 9 provided at the center of the back plate of the cover 8 into which the front face is open and the slider 4 fits in the case shown in the figure. A two-row shaft member 10 which is supported and fixed by screwing the ends of the slider 4 on both sides.
Through the back plate of the cover 8, and the ends of the coil springs 11 fitted on the outer sides of both shaft members 10 are brought into contact with the back plate of the cover 8 and the end bulging portion 12 of the shaft member 10 so that the slider 4 And a lower end of the oscillating plate 14 is rotatably attached to the arm 13 projecting rearward from the cover 8 via the pin 15 and has a large diameter fitted to the outside of the drive shaft 3. The end faces of the bulging portions 12 are respectively brought into contact with both front surfaces of the annular plate 16, and the lower end of the annular plate 16 is provided with the upper end of the oscillating plate 14, and the upper end of the annular plate 16 is provided with the lower end of the lever 7. When the levers 7 are fixed and pushed forward, the annular plate 16 and the bulging portion 12 that are pushed down together make contact with the shaft member 10.
At the same time, the slider 4 is moved forward. At this time, the coil spring 1
1 is compressed.

When the pushing down of the lever 7 is released, the slider 4 is restored by the compressed coil spring 11.

Further, on the front surface of the slider 4, there is provided an endless running belt 17 which runs along the entire peripheral edge of the opening 52 of the box 51.

A chain is used for the traveling zone 17 as shown in the figure, and the sprocket 19 is supported by fitting the peripheral portion into the square arc-shaped cutout portion 18 of the front plate member 5, and
The sprocket 19 is run across the running belt 17.

A blade 20 is attached to the traveling belt 17. The blade 20 has a blade plate shown in FIG. 4 in addition to the nail-shaped shaft member shown in FIG.

Reference numeral 21 is a transmission device for transmitting the rotation from the drive shaft 3 to the sprocket 19.

In the illustrated case, the transmission device 21 includes a spline shaft 22 provided on the drive shaft 3 in which the slider 4 slides.
, A first sprocket 24 in which a spline hole 23 is fitted to the spline shaft 22, and one sprocket 1
9, a second sprocket 25 provided coaxially and an endless chain 26 spanned between the first sprocket 24 and the second sprocket 25.

Next, a method of using the above-described punching tool will be described.

First, as shown in FIG. 5, the box 51 is fixed to the strip A by a nail a.

In the box 51 nailed, the upper and lower ends of the metal plate 54 are overlapped with the projecting pieces 53 projecting inwardly from the upper edge and the lower edge of the opening 52, and through holes at both ends of the metal plate 54. The metal plate 54 is attached by screwing the screw 55 inserted into the screw hole 56 of the projecting piece 53.

Further, a screw shaft 59 having a sharpened portion 58 at the tip of a screw hole 57 provided in the center between both ends of the metal plate 54.
Screw the end of.

After the above preparation is completed, as shown in FIG. 5, a base material B such as gypsum board or plywood is attached.

At this time, the sharpened portion 58 is pierced into the base material B and the screw shaft 59 is penetrated through the base material B.

Next, after removing the screw shaft 59 from the screw hole 57, the tip of the drive shaft 3 is inserted into the hole b and the screw hole 57 formed by the screw shaft 59 of the base material B as shown in FIG. At the same time, the open edge of the cover 8 is pressed against the surface of the base material B.

When the drive shaft 3 is rotated by the operation of the motor 2 ^′ , the endless belt 17 travels via the transmission device 21 and the blade 20 attached to the endless belt 17 travels together.

On the other hand, since the lever 7 is pushed forward, the slider 4 is pushed out and the blade 20 is pressed against the surface of the base material B.

As a result, while cutting the base material B with the blade 20, the box 51 is formed on the base material B as shown in FIG.
A hole C having the same shape as the opening 52 of is clear.

The scraps remain in the cover 8 and fall out from the cover 8 when the slider 4 is pushed out.

Further, as shown in FIG. 3, if a window 61 is provided on the lower peripheral surface of the cover 8, the cut powder is discharged downward.

Further, as shown in FIG. 3, when the pin 62 provided on the front surface of the slider 4 is penetrated through the base material B and the pin 62 is penetrated through the through hole 63 of the metal plate 54, the drive shaft 3 is centered. The rotation of the cover 8 and the slider 4 can be stopped.

The metal plate 54 is removed and the screw shaft 5 is removed.
Reuse with 9.

[0036]

[Effect] Since the present invention is configured as described above, it is not necessary to draw a wire to deepen the position of the box on the base material.
A hole of the same shape that matches the opening of the box can be drilled very quickly.

[Brief description of drawings]

FIG. 1 is a perspective view of a punching tool according to the present invention.

FIG. 2 is a partially cutaway perspective view showing an essential part of the above.

FIG. 3 is an enlarged side view of the same vertical section.

FIG. 4 is a perspective view of a blade

[Fig. 5] A vertical sectional side view with a base material attached.

FIG. 6 is a cross-sectional plan view showing a usage state of the punching tool.

FIG. 7 is a vertical cross-sectional side view after completion of drilling.

[Explanation of symbols]

1 Grip 2 Case 2 ^'motor 3 driving shaft 4 slider 5 plate-like body 6 spacer 7 lever 8 cover 9 bearing 10 shaft member 11 coil spring 12 bulging portion 13 the arm 14 rocking plate 15 pins 16 annular plate 17 traveling band 18 lacking Part 19 Sprocket 20 Blade 21 Transmission device 22 Spline shaft 23 Spline hole 24 First sprocket 25 Second sprocket 26 Chain

Claims (1)

[Claims] 1. A drive shaft that projects forward from the tip of a case with a grip and that is rotated by the operation of a motor installed in the case, and penetrates around the drive shaft so as to rotate freely around the center, And a slider provided so as to move forward against an applied backward return force by operating a lever, a rotation stopping device provided to stop the rotation of the slider, and run along the opening edge of the embedded box around the front surface of the slider. A perforating tool comprising an endless traveling belt provided so as to perform, a blade provided so as to project forward from the traveling belt, and a transmission device provided for transmitting traveling from the drive shaft to the traveling belt.