JPH049986Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to a portable electric cutting tool equipped with a guide, which cuts a material by swinging a blade such as a knife blade. It is something.

[Background of the idea]

Common power tools for cutting pipes and other materials include the widely known electric circular saw, which cuts by rotating a circular saw blade, and the electric jigsaw, which cuts by reciprocating the saw blade. On the other hand, portable electric cutting tools (hereinafter referred to as oscillating cutting tools) that cut by swinging a knife blade or saw blade as shown in Figure 4 are also used to cut pipe materials. is publicly known. Cutting with a portable electric circular saw is good because it allows you to finish the cut surface of the material in one plane, but it is difficult to finish the cut surface accurately at right angles to the longitudinal direction of the pipe material, and the chips are scattered a lot. This is deteriorating the working environment. On the other hand, when cutting with the electric jigsaw and the swing cutting tool, the fifth
As shown in the figure, the positions of the cutting start a and the cutting end b often do not match, and it is difficult to finish the cut surface in one plane, so it is necessary to correct the cut surface. However, especially when cutting with an oscillating cutting tool, the scattering of chips is extremely small.
The working environment is good. As described above, both the electric circular saw and the swinging cutting tool have advantages and disadvantages, and are insufficient as portable electric cutting tools for cutting pipes.

[Purpose of invention]

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to simplify the work of cutting pipe materials and the like using this type of portable electric cutting tool.

[Summary of the idea]

The present invention focuses on the fact that when cutting pipe materials, etc., if the direction in which the blade advances and the longitudinal direction of the pipe material are always perpendicular, the cutting start position and the cutting end position will match. The relationship between the direction of travel and the guide has been devised.

[Example of idea]

An embodiment of the present invention will be explained with reference to FIGS. 1, 2, and 3. FIG. 1 is a perspective view of a portable electric cutting tool showing an embodiment of the present invention.

In the figure, a main body 1 has a built-in electric motor 2, and the driving force of the electric motor 2 is converted into a swinging motion of a swinging arm 4 through a reduction mechanism section and a swinging mechanism section housed in a gear case 3. Ru. A blade 5 is attached to the swinging arm 4.
is detachably attached to the blade holder 6. A guide surface plate 7 is provided below the gear case 3, and a cutter 5 projects downward from a cutting hole 8 provided in the guide surface plate 7. Also, knife 5
A guide 9 is arranged behind the guide surface plate 7 and below the guide surface plate 7. 2 is a bottom view of the portable electric cutting tool of FIG. 1; FIG. Guide 9 is
As shown in FIG. 2, the guide plate 7 and the guide surface 10 are fixed together with body screws 11 so that the direction of movement of the cutter 5 is perpendicular to the guide surface 10.

In the portable electric cutting tool configured as described above, the blade 5 is pressed while pressing the guide surface 10 of the guide 9 against the longitudinal direction of the pipe material 12, as shown in FIG.
is brought into contact with the pipe material 12 to start cutting. Next, while the guide surface 10 is brought into contact with the pipe material, the main body is pushed in the advancing direction of the cutter 5 to continue cutting, so that the end position of the cut coincides with the start position of the cut.

Therefore, the cut surface is finished in one plane, and the pipe material 12 can be cut at right angles to the longitudinal direction.

As an embodiment of the present invention, in a portable electric cutting tool as shown in FIGS. 1 and 2, the guide 9
is fixed to the main body 1 with screws 11. However, as shown in FIG.
The guide surface of the guide 9 is kept perpendicular to the direction of movement of the guide 9, and the guide 9 is movable in the direction B. In this example, it is possible to adapt to the size of the outer diameter of the pipe material.

FIG. 7 shows another embodiment of the present invention. The guide surface 10 of the guide 9 does not necessarily have to have a large area. In this application example, the guide surface 10 is a line when viewed macroscopically, but if a plane including this line is perpendicular to the traveling direction A of the cutter 5, the same effect can be obtained. Further, FIG. 8 shows an example in which a guide 14 having a guide surface perpendicular to the traveling direction A of the cutter 5 is also provided in front of the cutter 5. In this example,
Since the guide surfaces are in front and behind the blade 5, when cutting pipe material, simply press the blade 5 against the pipe material and rotate the pipe material casually, and the cut surface will be on one plane and perpendicular to the longitudinal direction. can be finished.

[Effect of idea]

According to the present invention, in the longitudinal direction of the pipe material,
Since the guide is provided so that the cutter is always positioned at right angles, the cut surface of the pipe material can be easily finished in one plane and perpendicular to the longitudinal direction of the pipe material. Therefore, the pipe material can be cut very easily, and the operability can be improved.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the portable electric cutting tool of the present invention, Fig. 2 is a bottom view of Fig. 1, and Fig. 3 is the same as shown in Fig. 1 when cutting pipe material. A front view of the embodiment, FIG. 4 is a perspective view of a conventional portable electric cutting tool, FIG. 5 is a perspective view of a pipe material cut with the conventional portable electric cutting tool, and FIG. 6 is a bottom view showing another embodiment of the present invention, and FIGS. 7 and 8 are both front views showing still another embodiment of the present invention. 1 is the main body, 2 is the electric motor,
5 is a cutting tool, 7 is a guide surface plate, and 9 is a guide.

Claims (1)

[Scope of utility model registration request] A portable electric cutting tool comprising a main body with a built-in electric motor, a blade driven by the electric motor, and a guide plate attached below the main body, with the blade protruding downward from the guide plate. A guide with a guide surface perpendicular to the direction of travel,
A portable electric cutting tool characterized by being provided below a guide surface plate.