JPS6231274Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotary cutter device for cutting a sheet of rolled paper loaded into office equipment such as a copying machine or a facsimile machine into a required length.

This type of rotary cutter device includes a rotary blade rotatably supported on a frame, and a fixed blade pivotally attached to the frame so as to be pressed against the rotary blade by a spring force. The rotary blade further includes a support shaft having a groove running diagonally with respect to the axis, and an elongated plate-shaped cutting edge fixed to the groove of the support shaft. Conventionally, in order to fix a long and thin plate-shaped cutting edge in the groove of a support shaft, the cutting edge was inserted into a groove coated with a synthetic resin adhesive such as epoxy adhesive or phenolic adhesive, and then heated. had hardened.
However, the use of organic solvents poses problems in the working environment, and it takes a relatively long time to heat-cure the adhesive.Furthermore, the zinc chromate plating layer on the support shaft deteriorates slightly due to the high temperature of 200℃. There were drawbacks such as:

SUMMARY OF THE INVENTION The object of the present invention is to eliminate the above-mentioned drawbacks and provide a rotary cutter device equipped with a grooved rotary blade that allows the cutting edge to be quickly, easily, and reliably fixed to the support shaft.

The above purpose is achieved by arranging a plurality of holes in the longitudinal direction that pass through the plate-shaped cutting edge of the rotary blade in the horizontal direction, and when the cutting edge is inserted into the groove of the support shaft, each of these holes partially closes. The height of each hole is determined so that it is located inward from the surface of the support shaft, and the part of the support shaft adjacent to the hole on the cutting edge is fixed by caulking so that it flows into the hole on the cutting edge. .

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings.

1 and 2 show a rotary cutter device equipped with a rotary blade 10 according to the present invention.

A rotary blade 10 is rotatably supported on both side walls 1a and 1b of the frame.
and an elongated plate-shaped cutting edge 16 inserted and fixed into the groove 12 of the support shaft 14. With this invention,
The plate-shaped cutting edge 16 has a plurality of horizontally penetrating holes 18 arranged in the longitudinal direction, and the cutting edge 16 is connected to the support shaft 14.
Each hole 1 is arranged so that each hole 18 is partially located inward from the surface of the support shaft 14 when inserted into the groove 12 of the
Position 8. Then, attach the cutting edge 16 to the support shaft 1.
4, insert the cutting edge 16 into the groove 12, and then caulk the part of the support shaft 14 adjacent to the hole 18 with a tool such as a punch from both sides of the cutting edge as shown in Figure 2. Good. As a result, a portion of the support shaft 14 flows into the hole 18 of the cutting edge 16, and the cutting edge 16 is pressed against the groove bottom and firmly fixed.
After the cutting edge 16 is fixed to the support shaft 14, the cutting edge can be finished to a desired outer diameter using a grinder or the like.

FIG. 5 shows the cutting edge material 16' before being inserted and fixed into the groove 12 of the support shaft 14 and processed, and has a rectangular cross section. At both ends of this cutting edge material 16', there are stepped portions 16 that protrude to both sides beyond the actual length of the cutting edge.
a, 16b, after the cutting edge material 16' is fixed in the groove 12 of the support shaft 14, the stepped portions 16a, 16b of the cutting edge material can be removed.
The shaft portion into which the shaft 16b is inserted can be finished to a desired outer diameter and the rings 20, 22 can be press-fitted thereon (FIG. 6), thereby further ensuring the fixation of the support shaft 14 and the cutting edge 16. I can do it. Among these rings, the ring 22 is located on the right side in FIG. It has the role of guiding the fixed blade 24.
The opposite ring 20 is an end ring having an outer diameter smaller than the outer diameter of the cutting edge 16.

As shown in FIG. 2, side walls 1a, 1 of the frame
At the lower end of b, an elongated plate-shaped fixed blade 24 is provided below the rotary blade 10, and a shaft 2 protrudes from both end surfaces of the fixed blade 24.
6 and 28 (Fig. 1), and the cutting edge of the fixed blade 24 is pressed against the cutting edge of the rotary blade 10 by the force of the helical springs 30 and 32 attached to the shafts 26 and 28. It's becoming like that. In addition, in order to form a so-called serging state of the cutting blades, the shafts 26 and 2 of the fixed blade 24 are aligned with respect to the axis of the rotary blade support shaft 14.
The axis of 8 is inclined. That is, the end-of-cut axis 28 of the fixed blade 24 is slightly horizontally shifted inward from the axis 26 of the fixed blade at the start-of-cut side. The rotary blade edge 16 and the fixed blade 24 are typically made of hardened hardened steel, cemented carbide, ceramic, or the like.

To explain the operation simply, in the position before the start of cutting as shown in FIG. There is sufficient space between the support shafts 14, and the seat can move freely in that space. When the rotary blade 16 is rotated in the direction of the arrow in FIG. 2, the fixed blade 24 and the cutting edge 14 of the rotary blade 10 come into contact with each other at the cutting start side on the right side in FIG. The contact point between the fixed blade 14 and the fixed blade 24 moves to the left cutting end side, and the sheet is cut.

In this invention, a plurality of holes are arranged in the longitudinal direction that pass through the cutting edge of the rotary blade laterally, and when the cutting edge is inserted into the groove of the support shaft, each of these holes partially extends inward from the surface of the support shaft. Since the height of each hole has been determined so that the cutting edge is positioned in the groove, the part of the support shaft adjacent to the hole can be caulked so that it flows into the hole of the cutting edge after inserting the cutting edge into the groove. Furthermore, the cutting edge can be securely fixed to the support shaft.

[Brief explanation of the drawing]

Fig. 1 is a front view of a rotary cutter device equipped with a rotary blade according to the present invention, Fig. 2 is a cross-sectional view taken along the line - of Fig. 1, and Fig. 3 is a cross-sectional view taken along the line - of Fig. 1. A cross-sectional view of the rotary blade cut along the
Fig. 4 is a cross-sectional view of the rotary blade cut along the line - in Fig. 1, Fig. 5 is a perspective view of the cutting edge material before it is inserted and fixed to the rotating blade support shaft, and Fig. 6 is a cross-sectional view of the cutting edge material before it is inserted and fixed to the rotating blade support shaft. FIG. 3 is a diagram showing a completed rotary blade that has been inserted and fixed onto a support shaft, rings are press-fitted from both ends, and then polished. 1a, 1b...Frame, 10...Rotary blade, 1
2... Groove, 14... Support shaft, 16... Cutting edge, 18
...Hole, 24...Fixed blade.

Claims (1)

[Scope of utility model registration request] It consists of a rotary blade that is rotatably supported on the frame, and a fixed blade that is pivoted to the frame so as to be pressed against the rotary blade by a spring force. In a rotary cutter device consisting of a fixed elongated plate-shaped cutting edge, when a plurality of holes are arranged in the longitudinal direction that pass through the plate-shaped cutting edge of the rotary blade laterally, and the cutting edge is inserted into the groove of the support shaft. The height of each hole is determined so that each of these holes is located partially inward from the surface of the support shaft, thereby allowing the portion of the support shaft adjacent to the hole in the cutting edge to flow into the hole in the cutting edge. A rotary cutter device that is fixed by caulking.