JPS5812706Y2 - Break-off type blade - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a break-off type blade that is attached to a handle that also serves as a holder of an extrusion type cutter so as to be movable in the longitudinal direction.

Generally, the above-mentioned folding type blade has a long and thin blade plate with a large number of grooves (scores) that intersect with the longitudinal direction of the blade plate.
These folds are formed parallel to each other at regular intervals.

This break-off type blade is attached to the handle of an extrusion-type cutter, and whenever the sharpness of the cutting edge of the break-off type blade protruding from the handle deteriorates, this part is pushed out and broken off from the crease. I'm using that part.

However, in the conventional type, a linear blade is formed on one side edge of an elongated rectangular blade plate, and a break-off groove is formed at an angle to the -side edge. The tip of the part had an acute angle.

For this reason, the tip of the blade is easily worn, resulting in a significant decrease in sharpness, and is also prone to breakage, resulting in a short service life.

The purpose of the present invention is to eliminate the above-mentioned drawbacks, and to make the tip of the blade part obtuse, thereby reducing wear and breakage and extending the life of the blade.

That is, in order to achieve the above object, the present invention provides a folding type blade as described above, in which a large number of convex portions are provided at predetermined intervals on at least one side edge in the longitudinal direction of the blade plate. A blade plate that continues in a wave shape along the convex portion is formed on the side edge portion, and the end of the fold is positioned slightly toward the tip in the longitudinal direction of the blade plate from the most convex portion of the convex portion, and a blade plate is formed on each convex portion. On the other hand, one fold is formed in each case.

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

1 and 2 show an embodiment of the present invention.

In these figures, reference numeral 1 denotes a blade plate made of blade steel.

One side edge in the longitudinal direction of this blade plate 1 is formed in a wave shape with a large number of protrusions 2 provided at predetermined intervals, and the one side edge of the blade plate 1 has a continuous wave shape along the protrusions 2. A blade portion 3 is formed.

One end 4a of the convex portion 2 is located at a position slightly closer to the tip of the blade plate 1 than the most convex portion 2a, and the other end 4b is positioned closer to the distal end of the blade plate than the one end 4a. ) 4 is formed for each convex portion 2 so as to be inclined with respect to the longitudinal direction of the blade plate 1.

Moreover, the break-off grooves 4 are formed parallel to each other at regular intervals,
It is formed to a required depth over the entire width of the blade plate 1 except for the blade portion 3.

As shown in FIG. 3, the break-off type blade 5 configured as described above is fitted into the holding groove 7 of the handle 6 which also serves as a holder of the extrusion type cutter so as to be detachable and slidable in the longitudinal direction. .

Positioning the cutting groove 4 on the cutting edge side in the holding groove 7,
The blade plate on the tip side from this groove 4] The cutting edge part is made to protrude from the tip of the handle 6, and the blade plate 1 is held at the bottom of the holding groove 7 with the push plate 8 which is slidably fitted in the holding groove 7. The blade plate 1 is fixed to the handle 6 by clamping it and tightening the screw 9 provided on the push plate 8.

In this state, the required cutting and machining are performed using the blade portion 3 at the tip end of the blade plate 1 which protrudes from the handle 6.

If the cutting edge of the blade plate 1 becomes dull, loosen the screw 9 and push the blade plate 1 toward the tip side, so that the cutting groove 4 on the cutting edge side protrudes from the tip of the handle 6. The groove 4 is broken off, the portion on the distal end side is removed, the screw 9 is loosened, the cutting is performed, and the above-described operations are repeated.

FIG. 4 shows another embodiment of the present invention, which includes:
As shown in FIGS. 1 and 2, the convex portion 2 and the blade portion 3 are formed on both sides of the blade plate 1, and the break-off groove 4 is formed perpendicular to the longitudinal direction of the blade plate 1, as shown in FIGS. It's just different.

Further, the method of use is almost the same as that shown in FIGS. 1 and 2, except that the blade portions 3 on both sides of the blade plate 1 can be used.

In addition, in FIG. 4, 2a is the most convex part, and 4a, 4a are the break-off grooves 4 located slightly closer to the tip of the blade plate 1 than the most convex part 2a.
are both ends of

As explained above, the folding type blade of the present invention has the edge 4a of the fold consisting of the breaking groove 4 etc. located slightly closer to the tip of the blade plate 1 than the most convex part 2a of the convex part 2, so the extrusion type blade cutter handle 6
The tip of the blade 3 that protrudes from the edge has a rounded obtuse angle, and when used with the most convex portion 2a located slightly toward the distal end of the tip of the blade 3, hold the handle 6 normally and hold the paper. When performing processing such as cutting a thin object such as a blade, the tip of the blade portion 3 does not catch on the workpiece, and the vicinity of the most convex portion 2a hits the workpiece first, allowing the workpiece to be cut without breaking it.

Therefore, the tip of the blade 3 is less likely to wear out, and damage caused by the tip of the blade 3 being caught on the workpiece is prevented, and the life of the blade 1 is therefore extended.

In addition, since the blade part is formed in a wavy semicircular shape, when cutting round objects, it is possible to cut neatly along the roundness and circular shape.

Furthermore, it is convenient for crafting, cutting, and processing leather, etc.

Further, the handle which also serves as a holder for using the breakable blade of the present invention is not limited to the one shown in FIG. 3 described above, and any conventionally known handle can be used.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a cross-sectional view of the same thickness enlarged, and Fig. 3 is an explanation showing a state in which a break-off type blade is attached to the handle of an extrusion type cutter. 4 are plan views showing other embodiments of the present invention. 1...Blade plate, 2...Protrusion, 2a...
...Most convex part, 3...Blade part, 4...Break-off groove, 4a, 4b...End of break-off groove,
5...Breakable blade, 6...Handle, 7...
...Retaining groove, 8...Press plate, 9...Screw.

Claims (1)

[Scope of utility model registration request] A long and thin blade plate that is attached to the handle of an extrusion type cutter so that it can move in the longitudinal direction, and which also serves as a holder, has a number of folds formed parallel to each other at predetermined intervals, intersecting the longitudinal direction of the blade plate. In the taking blade, a number of protrusions are provided at predetermined intervals on at least one side edge in the longitudinal direction of the blade plate, and a blade part that continues in a waveform along the protrusions is formed on the side edge of the blade plate. , a folding type characterized in that the end of the fold is located slightly closer to the tip end in the longitudinal direction of the blade plate than the most convex part of the convex part, and one fold is formed for each convex part. blade.