JPH0111440Y2 - - Google Patents

Description

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

Regarding a cutting blade used in a cutting machine, a configuration in which the blade can be freely inserted into a blade holder has been proposed separately (see Utility Model Application No. 173427/1983). According to this, there is no need to replace the integral structure of the cutter and the base metal part to which it is brazed, as in the past, and it is economical because only the cutter needs to be replaced. Since the inclined surface of the cutter holder is mounted so as to be parallel to the back surface of the cutter holder, there is an advantage that a thin cutlery is sufficient as the cutter.

However, as a practical matter, it is extremely troublesome and dangerous to insert or pull out a knife into a narrow groove in a knife holder for replacement because the knife is thin and long. In particular, since the cutter holder is installed to be able to move up and down with respect to the gate-shaped base frame of the cutting machine, the open end of the groove into which the cutter is to be inserted is at a position recessed from the side of the base frame. Inserting a knife into the groove becomes even more difficult.

The purpose of this invention is to enable the cutting blade to be easily attached to the blade holder.

An embodiment of this invention will be described with reference to the drawings. Reference numeral 1 denotes a cutter holder, 2 a groove provided inside thereof along the longitudinal direction, and a cutter 3 is inserted into this groove 2.
1 and 2 show a state in which the cutter 3 is inserted, and FIGS. 3 and 4 show a state in which the cutter 3 is not inserted. The groove 2 is open at the end surface 1A of the blade holder 1, and is also open at the inclined lower surface 1B. The groove 2 is inclined on the back surface 1C of the cutter holder 1 so that the inclined surface 3A of the cutting edge of the cutter 3 is parallel to the back surface 1C of the cutter holder 1.
This configuration is not particularly different from those already proposed. Reference numeral 4 denotes a retaining claw that engages with the stepped portion 3B of the inserted knife 3, and is rotatably supported on the shaft 5.

According to this idea, support members 6 to 8 are installed so as to protrude from the end surface 1A. The first support member 6 is provided inclined so as to be parallel to the groove 2, and the second and third support members 7 and 8 are provided in a space 9.
The support member 6 is provided parallel to the support member 6 through the support member 6 so as to be inclined with respect to each other. Both support members 7 and 8 are aligned in a straight line across the opening surface of a sub-groove 10 provided in the cutter holder 1 following the groove 2.

Reference numeral 11 denotes a sheath used in this invention, which is constructed by, for example, resin molding. This has approximately the same length as the cutter 3, and has a groove 12 formed on its side surface. To explain the sheath 11 in more detail, its upper portion has a substantially U-shaped cross section with a top surface portion 13 and mutually parallel side wall portions 14 and 15. The tip of one side wall portion 15 forms one side edge of the split groove 12 . The other side wall portion 14 is inclined at the lower part, and this inclined portion and the vertical wall portion 1
6 forms a blade support portion 17 having a V-shaped cross section.

A metal gripper 18 is fixed to the base end of the cutter 3 by a rivet 19. The free end side of this gripping tool 18 is bent, and the grip portion 18
A is formed. Further, a guide portion 20 is installed on the back side of the cutter 3.

In the above configuration, in order to insert the cutter 3 into the cutter holder 1, the steps shown in FIGS.
As shown in the figure, the sheath tool 11 is installed in the cutter holder 1. That is, the side wall portion 14 of the sheath 11 is fitted into the space 9 between the support members 6 and 7 (see FIGS. 2 and 4). At this time, the top surface portion 13 is fitted onto the upper surface of the support member 7. In the fully fitted state, the sheath 11 is positioned at a predetermined position on the end surface 1A of the blade holder 1 and connected.
At this time, the vertical wall portion 16 is parallel to the back surface portion 1C of the cutter holder 1, and the side wall portion 14 is inclined with respect to the vertical direction.

The cutter 3 may be inserted into the sheath 11 in advance, or may be inserted after the sheath 11 is attached to the cutter holder 1 as described above. Knife 3
Insertion into the sheath tool 11 is carried out by pushing the gripping portion 18A while the portion between the gripping tool 18 and the gripping portion 18A is guided through the slot 12. Even after it is attached to the cutter holder 1, the base end of the sheath tool 11 has an appropriate length, so it protrudes sufficiently from the base frame of the cutting machine. It's easy.

When the knife is inserted into the sheath 11, the guide part 20 on the back side fits into the space between the support members 7 and 8,
Further, the back surface of the cutter 3 is inclined so as to lean against the support member 8. Furthermore, the cutting edge of the knife 3 fits into the lower tip of the knife support part 17 of the sheath tool 11. These allow the cutter 3 to be positioned at a predetermined position within the sheath 11. On the other hand, as mentioned above, the pods 1
Since the blade 1 is positioned in the blade holder 1, the blade 3 is eventually positioned at a predetermined position with respect to the blade holder 1. In this position, the cutter 3 is placed on the opening surface of the groove 2 and the guide portion 20
are arranged to face the opening surface of the sub-groove 10.

In this state, the knife 3 is pushed into the groove 2 by pressing the grip portion 18A with a finger or the like. At this time, the guide portion 20 is also pushed into the sub groove 10. When the cutter 3 is pushed into a predetermined position, the tip hits a stopper (not shown) installed in the groove 2 and is prevented from entering further. Thereafter, the sheath 11 can be removed from the blade holder 1. At this time, the claw 4 that had been pushed up by the sheath tool 11 returns to its hanging state, and the stepped portion 3 of the cutter 3
engages B. This allows the cutter 3 to be placed in the cutter holder 1.
It prevents it from coming out.

The cutter 3 is attached to the cutter holder 1 in the manner described above. The knife holder 1 moves up and down during cutting. In reality, it ascends and descends in an arcuate trajectory toward the lower left, as shown by arrow P in FIG. At this time, knife 3
The inclined surface 3A moves up and down vertically, thereby cutting the paper.

To remove the blade 3 that has just been attached, attach the sheath tool 11 to the blade holder 1 as described above. At this time, the inclined engagement claw 4A integrated with the claw 4
The shell is pushed by the upper wall of the sheath tool 11 and rotated counterclockwise as shown in FIG. Due to this rotation, the blade 3
The engagement with the pawl 4 is released naturally. After this, pull out the knife 3 by holding the knob 18A. After pulling it out to the position shown in FIG. 6, the sheath 11 can be removed from the cutter holder 1.

As detailed above, according to this invention, when a cutting blade is attached to the blade holder, a sheath that is removably attached to the blade holder is used to insert and remove the cutting blade into the narrow groove of the blade holder. As a result, even if the knife is long, it can be easily mounted without any danger.

[Brief explanation of the drawing]

Figure 1 is a front view showing an embodiment of this invention, Figure 2 is a front view showing an embodiment of this invention.
The figures are the same side view, Figure 3 is a front view with the blade removed, Figure 4 is the same side view, Figure 5 is a perspective view with part of the blade holder removed, and Figure 6 is when the blade is attached. 7 is a side view of the same, FIG. 8 is an exploded perspective view of FIG. 6, and FIG. 9 is a perspective view of the cutter seen from the back. 1...Blade holder, 1A...End face, 2...Groove,
3... cutlery, 11... sheath tool.

Claims (1)

[Scope of utility model registration request] A groove into which a cutting blade can be freely inserted and removed is provided inside the blade holder along its longitudinal direction, and the blade passes through the inside of the blade holder and is inserted into the end face of the blade holder where the groove is open. A sheath inserted into the groove of the holder is removably installed, and the sheath has approximately the same length as the cutter, and the grip provided at the proximal end of the cutter and its knob are connected to each other. A split groove that allows the part in between to pass through.
A cutting blade attachment device formed on a side surface of the sheath tool along its longitudinal direction.