JPS64314Y2 - - Google Patents

Description

[Detailed explanation of the idea] This idea relates to a cutting blade.

Conventionally, a cutting blade used in a cutting machine has a base metal part 2 made of general structural steel attached to a blade holder 1 with screws 3, and a blade 4 is brazed to this base metal part 2, as shown in FIG. are doing. According to this configuration,
When replacing the cutting edge 5 of the cutting tool 4 when it is worn out,
It can be removed by loosening the screw 3, which is convenient in that the blade can be replaced. Note that since the cutter 4 is made of high-speed tool steel, it is troublesome to machine screws thereon, so the base metal portion 2 as described above is used.

However, with such a configuration, it is troublesome to operate the screw 3 during replacement, and because the base metal part 2 is used for the reasons mentioned above, the price increases accordingly.
The structure is also complicated.

This idea not only makes it easier to change blades, but also
The purpose is to simplify the structure.

An embodiment of this invention will be described with reference to the drawings. Second
In the drawings and subsequent figures, 11 is a cutter holder, and 12 is a cutter based on this invention, which is made of high-speed tool steel or the like as in the past. The blade 12 has a ridge 14 on the opposite side from the cutting edge 13 in a bent shape. At the time of cutting, as shown in FIG.
Place the knife 12 in the knife holder 11 so that A is parallel.
Mounted at an angle. To explain specifically,
The back part 1 of the knife holder 11 is attached to the knife holder 11.
The groove 15 inclined with respect to 1A is connected to the blade holder 1.
1 along the longitudinal direction. This groove 15
The cross section matches the cross-sectional shape of the blade 12, excluding almost the cutting edge 13. In this case, since the peak portion 14 is bent, the cutter 12 will not fall downward. In other words, to prevent such falling, there is no need for any conventional screws or the like. B is a paper presser.

To attach the knife 12 to the knife holder 11,
The cutter 12 may be inserted into the groove 15 from one end face of the cutter holder 11 from one end thereof. When the groove 15 is formed over the entire length of the blade holder 11, if a stopper such as a screw or pin is installed at an appropriate location so as to cross the groove 15, it will not be inserted beyond the position of the stopper. It never happens. When it is necessary to prevent the inserted knife 12 from coming off, a retaining plate 16 is provided on the end face of the knife holder 11 so as to be rotatable with a pin 17, and a notch is provided in a part of the ridge 14 of the knife 12. 1
8 should be provided. When the cutter 12 is inserted to the predetermined position, the retaining plate 16 is inserted into the notch 18.
If you drop the blade into the blade, you can easily prevent the cutter 12 from coming off (see Figure 4). When replacing the cutter 12, it is sufficient to remove it from the groove 15 of the cutter holder 11. Furthermore, a new blade 12 may be inserted into the groove 15 as described above.

As understood from FIG. 2, the inclined surface 13A of the cutting edge 13 of the cutting tool 12 slightly protrudes from the back surface 11A of the cutting tool holder 11. Therefore, during cutting, a slight gap is created between the cutting surface of the paper P and the back surface 11A. Therefore, friction as would occur when these blades come into contact with each other does not occur, and the downward force of the cutting blade can be reduced accordingly, which is convenient.

At the time of cutting, the reaction force received from the paper P acts in the direction of the inclined surface 13A of the cutting edge 13;
and the inner surface of the groove 15. Therefore, even if the cutter 12 is made sufficiently thin (for example, 1 to 1.5 mm), no problem will arise.

Although the knife 12 is simply inserted into the groove 15, the knife holder 11 does not descend vertically during cutting, but descends diagonally downward as shown by the arrow in FIG. The more the blade holder 11 is
The knife 12 is now pressed against the blade. Therefore, no problem arises.

The knife 12 in this invention is oriented in the opposite direction with respect to the paper P, as is clear when compared with the knife shown in FIG. If this is to be oriented in the same direction as the blade shown in Fig. 1 and also to be able to be inserted into the groove as in this invention, it is necessary to install the blade so that the back surface of the blade 13 is perpendicular to the paper P. become unable to do so. However, if the direction of the knife is reversed as in this invention, the inclined surface 13A becomes perpendicular to the paper P by inserting it into the inclined groove, and thereby the paper P can be cut at right angles. This also makes it possible to insert a knife into the groove.

As detailed above, according to this invention, the removal and installation of the cutter can be done by simply inserting it into the groove and pulling it out, eliminating the need for conventional screw operations. Since a gap is formed between the inclined surface of the cutting edge and the pipe of the cutting blade, the downward force of the cutting blade is small, and the structure consists only of the blade and the blade holder, which eliminates the need for the conventional base metal part. Since it is not necessary and brazing of a cutter to it is also unnecessary, it can be manufactured at a low cost and the structure can be simplified.

[Brief explanation of the drawing]

FIG. 1 is a side view of a conventional example, FIG. 2 is a side view showing an embodiment of this invention, FIG. 3 is a perspective view during the installation process, and FIG. 4 is a partial perspective view. 11...Blade holder, 11A...Back part, 1
2...Knife, 13...Blade tip, 13A...Slanted surface,
15... Groove.

Claims (1)

[Scope of utility model registration request] A groove is provided inside the blade holder along its longitudinal direction, and a blade is inserted into and removed from the groove freely along the longitudinal direction, and the cross-sectional shape of the groove is defined as the cross-section of the blade excluding the cutting edge. In addition to conforming to the shape, the ridges of the cutlery are curved, and the groove is inclined with respect to the back surface of the cutter holder so that the inclined surface of the cutting edge of the cutter is parallel to the back surface of the cutter holder. The cutting blade has an inclined surface of the cutting edge of the cutting tool that protrudes outward from a back surface of the blade holder so that a gap is formed between the sloped surface of the cutting edge of the cutting tool and the cutting surface. .