JPH0475894A - Sheet cutter device - Google Patents

Abstract

PURPOSE:To prevent the coating agent around a cutting face from being peeled out of a sheet with its defect, by making the edging angle of a circular cutter at 60 - 90 angles. CONSTITUTION:The edging angle of a circular cutter 10 is made at 60 - 90 deg. angles and the contact area of the edging face 14 of the circular cutter 40 with a sheet 16 in the cutting initial stage is enlarged. Accordingly, the coating agent 44 of the sheet 16 surface is pressed by an edged face 14 to restrain the rise thereof and the generation of cracks is evaded. Therefore, it can be prevented that the coating agent 44 is peeled off according to the rotation of the circular cutter 10 and splashed with its becoming in powder.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a sheet cutter device, and particularly to a cutter device suitable for cutting sheets used in facsimiles, plotters, and the like.

BACKGROUND ART As a sheet cutter device for cutting a rolled sheet into a desired length, for example, Japanese Patent Application Laid-Open No. 1-2402
There is one described in Publication No. 95. This device is
Mainly used in printers, copying machines, etc., it consists of (a) a circular cutter with a cutting edge formed along the circumference, and (b) a circular cutter that is rotatable around its center line and whose center line is (C) A cutter drive device that rotates and moves the circular cutter; (d) A receiving member that works with the circular cutter to cut sheets of paper, film, etc. It is configured to include. The cutter driving device is driven to rotate and move the circular cutter supported by the cutter support device, thereby cutting the sheet between the receiving member and the cutting blade of the circular cutter.

Problems to be Solved by the Invention However, the above-mentioned cutter device has a problem in that it cannot properly cut sheets used in machines such as facsimiles and plotters. For example, the fifth
As shown in the figure, a circular cutter 102 having a cutting edge ]00
The angle of the blade surface 104, that is, the blade angle θ, was set at an angle of 15 to 30' in order to reduce the cutting resistance when cutting the sheet (the blade angle θ shown in the figure is 30°). On the other hand, Sheet 1-106 used in devices such as facsimile machines has a coating agent such as a coloring agent 11 on the surface of a base such as paper + A10s.
0 is coated, but the coating agent 120 is relatively brittle. Therefore, if the cutting blade 100 bites into the sheet 106 as the sheet 106 is cut, the coating agent 110 will be applied to the sheet along the blade surface 104.
06 and a crack 112 is generated on the surface. Therefore, as shown in FIG. 6, as the circular cutter 102 rotates, the coating agent 110 around the crank is damaged and peeled off, becoming powder 114 and scattering, contaminating the surrounding area. In addition, the portions that have not been peeled off may remain on the surface of the sheet 106 and become raised portions 116, or the coating agent 110 may sag into the base +4108 side, resulting in sagging portions 120. .

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a cutter device that can prevent the material coated on the surface of a sheet from peeling off from around the cut surface during cutting.

Means for Solving the Problems j7 The gist of the present invention is to provide the above-mentioned (a) circular cutter;
) cutter support device, (C) cutter drive device, and (d)
In the sheet cutter device including the receiving member, the blade angle of the circular cutter is set to 60=90°.

Function In the cutter device configured as described above, the contact area of the circular cutter blade (one surface) to the sheet is increased at the initial stage of sheet cutting, so the coating agent on the sheet surface is pressed down by the blade surface and bulges are suppressed. Therefore, the coating agent is prevented from peeling off as the circular cutter rotates and becoming powder and scattering.

Effects of the Invention As mentioned above, the coating agent around the cut surface is prevented from chipping and peeling off from the sheet, and the amount of coating agent powder is reduced, which reduces the amount of dirt around the cut portion of the sheet. is obtained.

EXAMPLE Hereinafter, an example of the present invention will be described in detail based on the drawings.

In FIG. 3, 10 is a disc-shaped circular cutter. The circular cutter 10 has a cutting edge 12 formed along its circumference, and as shown in enlarged numbers 1 to 1 in FIG. The angle of the attached surface 14, that is, the cutting angle θ is 75°.

A circular cutter 10 is placed in an orientation intersecting the sheet 16 (see FIG. 1) to be cut by the wood cutter device.

The circular cutter 10 is supported by a hollow 1h20.

The hollow shaft 20 is press-fitted into a center hole 22 formed in the center of the circular cutter 10, and can rotate integrally with the circular cutter 10 around the center line I of the circular cutter 10.

Further, a pinion gear 24 is fitted to the hollow shaft 20 so as to be non-rotatable. The pinion gear 24 is meshed with a rack 28 formed on a sheet guide 26 disposed below the hollow shaft 20. The rack 28 is formed in a line in a direction substantially perpendicular to the center line p of the circular cutter 10. It has many rectangular holes. In addition, the sheet guide 26
is for guiding the sheet 16 to the circular cutter IO.

A support shaft 32 is rotatably pushed through the center hole 30 of the hollow shaft 20 . The support shaft 32 is fixed to a carriage that moves in a direction perpendicular to its axis, and as the carriage moves, the pinion gear 24 is rotated by the rack 2, and the circular cutter 10 is rotated and moved. It happens. In this embodiment, the hollow shaft 20.
The support shaft 32 and the carriage constitute a cutter support device, and a moving device for moving the carriage and a pinion gear 2
4 and the rack 28 constitute a cutter driving device.

A fixed blade 36 serving as a receiving member is provided below the sheet guide 26. The fixed blade 36 has a cutting edge 38 that cooperates with the cutting edge 12 of the circular cutter 10. Further, a coil spring 40 is disposed between the hollow shaft 20 and the carriage, and the circular cutter 10 is connected to the coil spring 40.
It is pressed against the fixed blade 36 by a biasing force of 0. Therefore, as the circular cutter 10 rotates and moves, the sheet 16 is properly cut by the cutting blades 12 and 38.

A case in which the cutter device configured as described above cuts the seam 16 shown in FIG. 1 will be described. When the sheet 16 is guided by the sheet guide 26, a motor (not shown) is driven, the carriage is moved, the circular cutter 10 rotates and moves, and starts cutting the sheet 16 in cooperation with the fixed blade 36. The sheet 16 is made by coating the surface of a paper 42 as a base material with a coloring agent 44, and the cutting blade 12 of the circular cutter 10 bites into the sheet 16 at the initial stage of cutting. At this time, since a wide portion of the blade surface 14 is pressed against the coloring agent 44, the coloring agent 44 is suppressed from being raised along the blade surface 14, and even if it occurs, the sheet 16 of the raised portion 46 is The amount of rise from the surface is also very small. Therefore, generation of cracks on the surface of the sheet 16 is prevented, and the bladed surface 14
The coloring agent 44 attached to the sheet 16 is prevented from peeling off from the sheet 16 as the circular cutter 10 rotates, scattering as powder, and staining the surrounding area.

FIG. 2 shows a cut surface of the sheet 16 by the cutter device. As is clear from the figure, the number of raised portions 46 and portions 48 where the coloring agent 44 sags toward the paper 42 side is small, and the amount of swells and sagging portions are also very small.

Although one embodiment of the present invention has been described above, the blade angle of the circular cutter does not have to be 75 degrees, and may be selected from an appropriate angle of 60 to 90 degrees depending on the nature of the sheet to be cut. This makes it possible to cut a sheet coated with a substance that is easily peeled off during cutting, in addition to a coloring agent, while suppressing the generation of coating agent powder to a small amount.

In addition to the above embodiments, various modifications may be made based on the knowledge of those skilled in the art.
The invention can be practiced in modified forms.

[Brief explanation of the drawing]

FIG. 1 is an enlarged front cross-sectional view showing the vicinity of a cutting blade and a sheet to be cut of a sheet cutter device according to an embodiment of the present invention. FIG. 2 is a perspective view showing a cut portion of a sheet cut by the apparatus shown in FIG. 1. FIG. 3 is a front sectional view showing the main parts of the device, and FIG. 4 is a front view showing an enlarged part of the circular cutter. FIG. 5 is a diagram similar to FIG. 1 of the conventional sheet cutter device, and the sixth
The figure is a perspective view showing a cutting section of a sheet cut by the apparatus of FIG. 5. 10: Circular cutter 12: Cutting blade 14: Bladed surface 16: Sheet 20: Hollow shaft
24: Binion gear 28
32: Support shaft 36: Fixed blade 44: Coloring agent

Claims (1)

[Claims] A circular cutter with a cutting edge formed along its circumference, and a cutter that supports the circular cutter so that it can rotate around its center line and move in a direction substantially perpendicular to its center line. A sheet cutter device including a support device, a cutter drive device that rotates and moves the circular cutter, and a receiving member that cuts sheets of paper, film, etc. in cooperation with the circular cutter, wherein the circular cutter has a blade. A sheet cutter device characterized in that the corners are at an angle of 60 to 90 degrees.