JPH07110478B2 - Sheet cutter device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet cutter device, and more particularly to a cutter device suitable for cutting a sheet used in a facsimile, a plotter, or the like.

2. Description of the Related Art A sheet cutter device for cutting a rolled sheet into a desired length is disclosed in, for example, Japanese Patent Application Laid-Open No. 1-240295. This device is mainly used in printers, copiers, etc., and (a) is a circular cutter having a cutting edge formed along its circumference, and (b) is capable of rotating the circular cutter about its center line. A cutter supporting device that supports the cutter so as to be movable in a direction substantially perpendicular to the center line, (c)
It is configured to include a cutter driving device that moves the circular cutter while rotating it, and (d) a receiving member that cuts a sheet such as paper or film in cooperation with the circular cutter. The cutter driving device is driven so that the circular cutter supported by the cutter supporting device is moved while being rotated, whereby the sheet is cut between the receiving member and the cutting blade of the circular cutter.

SUMMARY OF THE INVENTION However, the cutter device has a problem in that a sheet used in a device such as a facsimile or a plotter cannot be cut well. For example, as shown in FIG. 5, a bladed surface of a circular cutter 102 having a cutting blade 100.
The angle of 104, that is, the bladed angle θ was set to an angle of 15 to 30 ° in order to reduce the cutting resistance at the time of cutting the sheet (the bladed angle θ shown in the figure is 30 °). On the other hand, the sheet 106 used in a device such as a facsimile is a substrate 108 such as paper coated with a coating agent 110 such as a coloring agent, but the coating agent 110 is relatively fragile. Therefore, when the cutting blade 100 digs into the sheet 106 along with the cutting of the sheet 106, the coating agent 110 bulges on the surface of the sheet 106 along the bladed surface 104, and a crack 112 occurs. And
As shown in FIG. 6, as the circular cutter 102 rotates, the coating agent 110 around the cracks is broken and peeled off, becoming powder 114 and scattered to contaminate the surroundings. In addition, the portion that has not been peeled off is raised as it is on the surface of the sheet 106 to form a raised portion 116, or the coating agent 110 slumps toward the base material 108 side to form a sloping portion 120.

The present invention has been made in view of the above problems, and an object thereof is to provide a cutter device capable of preventing a substance coated on the surface of a sheet from peeling from the periphery of a cut surface during cutting.

Means for Solving the Problems And the gist of the present invention is to provide the circular cutter (a),
In the sheet cutter device including the (b) cutter support device, (c) cutter drive device, and (d) receiving member, the blade angle of the circular cutter is set to an angle of 60 to 90 °.

Action In the cutter device having the above configuration, since the contact area of the blade with the blade of the circular cutter in the initial stage of sheet cutting is increased, the coating agent on the surface of the sheet is suppressed by the bladed surface and the protrusion is suppressed, Generation of cracks is avoided. Therefore, it is possible to prevent the coating agent from peeling off as the circular cutter rotates and becoming a powder and scattering.

EFFECTS OF THE INVENTION As described above, it is possible to prevent the coating agent around the cut surface from peeling off from the sheet due to loss, and reduce the powder of the coating agent, so that the effect of reducing the stain around the cut portion of the sheet can be obtained. .

Embodiment Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 3, 10 is a disk-shaped circular cutter. A cutting blade 12 is formed along the circumference of the circular cutter 10, and as shown in an enlarged view in FIG. 4, the angle of the bladed surface 14, that is, the bladed angle θ is set to 75 °. There is. Circular cutter
The sheet 10 is arranged in a posture intersecting with the sheet 16 (see FIG. 1) cut by the present cutter device.

The circular cutter 10 is supported by a hollow shaft 20. Hollow shaft
20 is press-fitted into a center hole 22 formed in the center of the circular cutter 10, and the circular cutter 10 is provided around the center line l of the circular cutter 10.
It is possible to rotate together with 10. A pinion gear 24 is fitted on the hollow shaft 20 so as not to rotate relative to it. The pinion gear 24 is meshed with a rack 28 formed on a sheet guide 26 arranged below the hollow shaft 20. The rack 28 has a large number of rectangular holes formed in a line in a direction substantially perpendicular to the center line 1 of the circular cutter 10. The sheet guide 26 guides the sheet 16 to the circular cutter 10.

A support shaft 32 is rotatably inserted in 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 the pinion gear 24 is rotated by the rack 28 along with the movement of the carriage, and the circular cutter 10 is moved while being rotated. Becomes In the present embodiment, the hollow shaft 20, the support shaft 32 and the carriage constitute a cutter supporting device, and the moving device for moving the carriage, the pinion gear 24 and the rack 28 constitute a cutter driving device.

Below the sheet guide 26, a fixed blade 36 as a receiving member is provided.
Is provided. The fixed blade 36 has a cutting edge 38 cooperating with the cutting edge 12 of the circular cutter 10. A coil spring 40 is arranged between the hollow shaft 20 and the carriage,
The circular cutter 10 is pressed against the fixed blade 36 by the urging force of the coil spring 40. Therefore, the circular cutter 10
The sheet 16 is satisfactorily cut by the cutting blade 12 and the cutting blade 38 in association with the rotation and movement of the sheet.

A case where the sheet 16 shown in FIG. 1 is cut by the cutter device configured as described above will be described. Seat 16
Is guided by the sheet guide 26, a motor (not shown) is driven and the carriage is moved to move the circular cutter.
The 10 moves while rotating, and starts cutting the sheet 16 in cooperation with the fixed blade 36. The sheet 16 is formed by coating the surface of a paper 42 as a base material with a color former 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 bladed surface 14 is pressed against the coloring agent 44, the coloring agent 44 is suppressed from rising along the bladed surface 14, and even if it occurs, the sheet 16 of the raised portion 46. The amount of swelling from the surface of the is very small. Therefore, generation of cracks on the surface of the sheet 16 is prevented, and the coloring agent 44 attached to the bladed surface 14 is peeled off from the sheet 16 as the circular cutter 10 is rotated, and is scattered as powder to spread around the periphery. It is prevented from becoming dirty.

A cut surface of the sheet 16 by the cutter device is shown in FIG. As is apparent from the figure, the number of the ridges 46 and the drooling portion 48 of the color-developing agent 44 on the side of the paper 42 are small, and the swelling amount and the drooling amount are also very small.

Although the embodiment of the present invention has been described above, the blade angle of the circular cutter need not be 75 °, and an appropriate angle may be selected from 60 to 90 ° depending on the properties of the sheet to be cut. This makes it possible to cut the sheet coated with a substance that easily peels off during cutting, in addition to the color former, while suppressing the generation of powder of the coating agent to a small amount.

Other than the above embodiment, various modifications based on the knowledge of those skilled in the art,
The present invention can be implemented in an improved manner.

[Brief description of drawings]

FIG. 1 is an enlarged front sectional view showing a periphery of a cutting edge 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 cutting portion of a sheet cut by the apparatus shown in FIG. FIG. 3 is a front sectional view showing an essential part of the above apparatus, and FIG. 4 is an enlarged front view showing a part of the circular cutter. FIG. 5 is a view similar to FIG. 1 in a conventional sheet cutter device, and FIG.
The drawing is a perspective view showing a cutting portion of a sheet cut by the apparatus of FIG. 10: Round cutter, 12: Cutting blade 14: Face with blade, 16: Sheet 20: Hollow shaft, 24: Pinion gear 28: Rack, 32: Support shaft 36: Fixed blade, 44: Coloring agent

Claims (1)

[Claims] 1. A circular cutter having cutting edges formed along its circumference, and a cutter support for rotatably supporting the circular cutter about its center line and movable in a direction substantially perpendicular to the center line. A sheet cutter device including a device, a cutter driving device that moves the circular cutter while rotating it, and a receiving member that cuts a seal of paper, film, and the like in cooperation with the circular cutter, wherein a blade angle of the circular cutter is included. The cutter device for sheets is characterized in that the angle is 60 to 90 °.