JPH0337576Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a blade holding structure for a tool that cuts by swinging the blade.

[Background of the idea]

2. Description of the Related Art A swing cutting tool that cuts a material by swinging a knife-like thin blade is known.

Further, knife-shaped thin-edged tools are standardized in shape and size, as typified by the cutter knife as shown in FIGS. 6 to 8.

Conventional swing cutting tools use a large cutter knife with a width of approximately 18 mm and a thickness of approximately 0.5 mm, as shown in Figure 6, to cut gypsum board, fiberboard, etc., but the blade width of the blade is wider. Therefore, it was impossible to cut the material into small circles or arcs. Moreover, as shown in FIGS. 10 and 11, the blade holding plate 2
is a plate material with a uniform thickness, and has a structure in which the knife-shaped thin-edged cutter 7 is held between the groove formed in the swinging arm 1 and the cutter holding plate 2, so that it can be used for small-sized blades as shown in FIGS. 8 and 9. It was not possible to hold blades with different blade widths and plate thicknesses, such as the knife-like thin-edged blade 3.

[Purpose of invention]

The purpose of the present invention is to eliminate the drawbacks of the prior art described above and increase the types of blades that can be held by this type of cutting tool. The goal is to make cutting possible.

[Summary of the idea]

The present invention focuses on the fact that the blade holding plate 2 can be used reversibly, and one side has a large knife-like thin blade 7.
The depth of the groove in the swinging arm 1 and the height and width of the convex portion 5 of the blade holding plate 2 are designed so that a small knife-like thin-edged blade 3 can be held on the other side. This is what I did.

[Example of idea]

The present invention will be explained with reference to FIGS. 1 to 5.

FIG. 1 is a front view showing an embodiment in which a small knife-like thin-edged blade is held by a blade holding plate according to the present invention. FIG. 2 is a cross-sectional view of FIG. 1,
Figure 3 is a front view of a conventional large knife-shaped thin-edged blade held, Figure 4 is a sectional view of Figure 3, and Figure 5 is a small knife-shaped thin-edged blade held by the blade holding plate of the present invention. FIG. 2 is a partially cross-sectional front view showing an embodiment of the swing cutting tool.

The motor main body 8 has a motor therein, and a power supply section is housed in a tail cover 9. A gear case 13 is disposed in front of the motor body 8 and stores the pinion and gear of the reducer 12, the output shaft 16, a part of the swinging arm 1, the fulcrum 14, etc. A guide surface plate 15 is fixed. An eccentric cam is formed on the output shaft 16, and the eccentric cam engages with the swing arm 1. The swing arm 1 can rotate and move up and down about a fulcrum 14 that is the center of swing. Therefore,
The power from the motor is transferred to the output shaft 16 by the reduction unit.
The swinging arm 1 swings about the fulcrum 14 by the eccentric cam. A convex portion 5 and a plate thickness adjustment portion 6 are formed on the blade holding plate 2 on the swinging arm 1 so that a small knife-like thin-edged blade 3 can be held therein. This is the general configuration, and the blade holding plate 2
As shown in FIG. 2, the convex portion 5 provided on the holder serves as abutment for the small knife-like thin-edged tool 3. In addition, the plate thickness adjustment section 6 adjusts the difference (t-s) between the plate thicknesses of the large knife-shaped thin-edged blade 7 and the small knife-shaped thin-edged blade.
The swing arm 1 is made to protrude from the end face of the blade holding plate 2.
The grooves provided in the holder 3 are left as they are, so that a small knife-like thin blade 3 can be held in the same way as a large knife-like thin blade.

Therefore, the large knife-like thin-blade cutter 7 is held between the flat surface of the cutter holding plate 2 and the groove of the swinging arm 1, as shown in FIGS. 3 and 4. In addition, for small knife-like thin blades, the blade holding plate 2
, and remove the convex portion 5, plate thickness adjustment portion 6, and swing arm 1.
It is held in place by the grooves.

As a result, blades with different blade widths and plate thicknesses can be attached simply by reversing the blade holding plate 2, so circular machining and curve machining with small radii, which could not be done conventionally, can now be easily performed.

As an example of application of the present invention, as shown in FIG. 12, two protrusions 5 are provided on the blade holder 2, and the protrusions 5 form a groove into which a small knife-like thin-edged blade 3 is fitted. In this method, the thickness of the plate is adjusted by the plate thickness adjusting section 6, and a small knife-like thin blade is held between the swing arm 1 and the groove of the blade holding plate.

In this application example, the blade holder plate is also reversed to adjust the plate thickness.
It is the same to hold knives with different blade widths, and therefore the same effect as the present invention can be obtained.

[Effect of idea]

According to the present invention, the blade holding plate 2 is provided with the plate thickness adjustment part 6 and the convex part 5 so that it can hold a small knife-like thin bladed blade 3 with a narrow blade width and a thin plate. Circle machining and curve machining are now possible.

In addition, although the holding method of the present invention involves inverting the cutter holding plate, the method of holding the cutter between the groove of the swinging arm 1 and the cutter holding plate 2 is the same, so there is no change in the method of holding the cutter. do not have. Therefore, the work of holding the cutlery is simple and there is no need to add any parts to hold two types of cutleres, so it is possible to provide the user with an inexpensive cutter holding mechanism.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the blade holding structure according to the present invention, and shows an embodiment in which a small knife-like thin blade is attached, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a cross-sectional view according to the present invention. FIG. 2 is a front view showing a blade holding structure with a large knife-like thin blade attached thereto. FIG. 4 is a sectional view taken along line BB in FIG. 3, and FIG. 5 is a partially sectional front view showing an embodiment of a swing cutting tool equipped with a blade holding structure according to the present invention. Figure 6 is a front view of a large knife-like thin-edged tool, Figure 7 is its bottom view, and Figure 8 is a
The figure is a front view of a small knife-like thin bladed tool, FIG. 9 is a bottom view thereof, FIG. 10 is a front view showing a conventional blade holding structure, and FIG. 11 is a sectional view taken along the line CC in FIG. 10. FIG. 12 is a sectional view showing another embodiment of the present invention. 1 is a swinging arm, 2 is a blade holding plate, 3 is a small knife-like thin blade, 5 is a convex portion, 6 is a plate thickness adjustment portion, and 15 is a guide surface plate.

Claims (1)

[Scope of utility model registration request] It has a guide surface plate that comes into contact with the workpiece and serves as a reference surface for machining, and a commercially available knife-shaped thin-edged tool such as a cutter knife is made to protrude from a cutting hole drilled in the guide surface plate, and the knife-like thin-edged tool In a cutting tool that cuts a workpiece by swinging the knife-like thin-edged blade by power, the blade is held between a swinging arm and a blade holding plate, and a cutting tool is provided on one side of the blade holding plate from the contact surface with the swinging arm. A convex plate thickness adjusting portion and a convex portion further convex than the plate thickness adjusting portion are formed, and the blade holding plate is formed of:
A blade holding structure for a swing cutting tool, characterized in that it is reversibly attached to the swing arm.