JP2604003Y2 - Cutting tool - Google Patents

Description

[Detailed description of the invention]

[0001]

INVENTION The present invention relates to relates to a cutting tool to be used to cut or windows disconnect the gypsum board

[0002]

Conventionally such cutting tool, as shown in FIG. 3, the blade 9 having a cutting blade or saw blade-like cutting edge, such as mosquitoes Ttanaifu was used. Further, the width of the blade 9 was wide like a commercially available cutter knife, and the blade portion 10 was provided only on one side and had an asymmetric shape.

[0003]

[Problems to be solved by the invention] In the current construction using gypsum board, the work to cut the gypsum board to a certain size before attaching it to the wall, etc., and to attach the outlet and the switch after attaching to the wall etc. There is a work to open a window.
When performing window cutting work after attaching the plaster board to the wall etc.,
In the conventional cutting tool, there is a possibility that the electric wire or the like may be damaged by the blade portion 10 of the blade 9 because the electric wire or the like is under the gypsum board.
In many cases, a rectangular or oval-shaped box to be embedded is installed under a gypsum board for window opening work for an outlet, and a square or oval-shaped hole is drilled in accordance with the box. When performing this work, the width of the blade 9 is large,
Because it can not cut the curve with a small curvature,
Turning around the corner when drilling the square or oval shape
Cutting was not possible and cutting efficiency was poor. The blade portion 10 of the blade 9 has only one side, the switching for the shape of the front and rear asymmetric
In some cases , the traveling direction of the cutting tool is determined on the side where the blade portion 10 is located , resulting in poor workability . The purpose of this invention is
An object of the present invention is to provide a cutting tool that can solve the above-described problems.

[0004]

SUMMARY OF THE INVENTION The above-mentioned object is attained by the above-mentioned object.
The blade is made of a thin plate without a cutting blade and
Make it thinner than the gypsum board to be cut, and
The tip of the blade must be tapered and the blade
Achieved by having a shape that is symmetrical about the row direction
It is.

[0005]

The cutting tool constructed as described above has a blade
The so blade portion is formed by an have thin gypsum board advances while Oshikiri, even if the electric wire or the like under the plasterboard electric wires
There is no damage the wire or the like with the push of a. In addition, since the width of the blade is narrow in a portion such as a square corner, the blade can be turned while changing the direction of the tool according to the shape of the corner. Also, when the tool is retracted, the blade shape is symmetrical in the front-rear direction, so that the cutting can be performed in the same manner as when the tool is advanced.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG.
The motor (not shown) housed in the housing 1 is operated by pressing the switch 2. The rotation of the motor is converted 90 degrees by the gear 3 and transmitted to the spindle 4 fixed to the gear 3. The spindle 4 has a portion eccentric with the rotation center axis of the gear 3, and a rod 6 is rotatably disposed at the eccentric portion. The rotation of the motor is transmitted to the rod 6 from the eccentric portion of the spindle 4, and is converted into a reciprocating motion at the tip where the blade 7 is mounted via the fulcrum 5. The cutting work is performed by attaching the blade 7 to the tip of the rod 6 and pressing the base 8 against the surface of the gypsum board. However, as shown in FIG. The gypsum board can be pushed out but will not damage the wires. Since the width of the blade 7 is smaller than the thickness of the gypsum board as shown by α in FIG. 2, the blade 7 can be turned and cut. Also, as shown in FIG. The cutting operation can be performed in the same manner regardless of whether it is moved forward or backward.

[0007]

[Effects of the Invention] As described above, according to the present invention, the blade is not provided with a blade portion and has a narrow width and has a symmetrical shape in front and rear. It is possible to achieve an effect that a cutting operation without turning, a turning operation, a cutting operation by both forward and backward movement, and the like can be performed.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of the cutting tool of the present invention.

FIG. 2 is a side view showing an embodiment of the blade used in the present invention.

FIG. 3 is a side sectional view showing a conventional gypsum board cutting tool.

[Explanation of symbols]

1 is a housing, 2 is a switch, 3 is a gear, 4 is a spindle, 5 is a fulcrum, 6 is a rod, 7, 9 are blades, 8 is a base, and 10 is a blade.

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B26B 7/00 B26D 1/30

Claims (2)

(57) [Scope of request for utility model registration] 1. A cutting tool for converting the rotation of a motor into a reciprocating motion or an elliptical motion and transmitting it to a blade, and cutting the gypsum board by the blade, wherein the blade is a cutting blade portion. When formed from a thin plate without
Cut the width to less than the thickness of the gypsum board and fix it further
A cutting tool characterized in that the tip side is tapered narrower than the end side . 2. The cutting tool according to claim 1, wherein the blade has a shape which is symmetrical with respect to a traveling direction.