JP2835573B2 - Sheet cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device for cutting a sheet with a rotary blade.

[0002]

2. Description of the Related Art Conventionally, a cutting apparatus of the type in which a rotary blade moves to cut a sheet generally comprises a combination of a rotary blade and a fixed blade against which the rotary blade rubs. For example, see JP-A-3-10790, JP-A-62-166989, and JP-B-5-43470.

FIG. 5 shows a sheet cutting model in a conventional cutting apparatus of this kind. 20 is a sheet, 21
Is a rotary blade, which moves in a direction perpendicular to the paper surface while rotating. 22 is a fixed blade.

[0004]

However, in this type of cutting device, a fixed blade is indispensable, and the mutual positional relationship and operation of the rotary blade and the fixed blade greatly affect the quality of sharpness. Therefore, precision in the mechanism is required,
The structure was complicated, and there was a limit in reducing the cost.

The present invention is intended to solve the above-mentioned problems, and is suitable for cutting a relatively thin sheet material such as paper or resin having a small cutting energy. It is an object of the present invention to provide an inexpensive sheet cutting device for cutting only with a rotary blade.

[0006]

In order to achieve the above object, a sheet cutting apparatus according to the present invention comprises a traveling body reciprocating along a guide member, and a pair of bearings provided on the traveling body. A rotating shaft having a rotating blade, both sides of which are rotatably supported by the pair of bearings, and a driving shaft that rotates by receiving a driving force, and is disposed adjacent to both sides of the rotating blade, and the pair of bearings has a driving shaft. Has a pair of rotating wheels rotatably mounted on eccentric shafts provided eccentrically, a soft ring fitted on the outer periphery of the rotating ring, and a relief groove of a cutting edge of the rotating blade for cutting. And a sheet mounting table on which the sheets are mounted.

[0007]

According to the above construction, when cutting the sheet placed on the sheet placing table, the ring fitted on the outer periphery of the rotating wheel rolls on the sheet on both sides of the relief groove together with the movement of the traveling body. While pressing, the sheet is cut by the rotation of the rotary blade.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described below in detail with reference to the drawings. FIG. 1 shows an embodiment of the present invention. Numeral 11 denotes a rail as a guide member, and numeral 9 denotes a slider as a traveling body which engages with the rail 11 and slides with a light force to reciprocate. is there. Reference numerals 4 and 5 denote a pair of two bearings provided on the slider 9, and the drive shaft 1 is rotatably supported by the bearings 4 and 5. A drive joint 2 having a partially square cross-sectional shape is press-fitted into the rotary shaft 1, and a rotary blade 3 having a square hole at the center is fitted into the drive joint 2.

The bearings 4 and 5 have eccentric shafts 4a and 5a which are eccentric with respect to the drive shaft 1 by ε, as shown in FIG. 2 partially showing the XX section of FIG. A pair of rotatable rotating wheels 6 are attached to both sides of the rotating blade 3 at 4a and 5a, and a soft and non-slip, for example, rubber ring 7 is fitted on the outer periphery of the rotating wheel 6. ing. Reference numeral 10 denotes a bracket to which the bearing 5 is fixed.

Reference numeral 8 denotes a relief groove 8a for the cutting edge of the rotary blade 3,
A sheet mounting table on which a sheet to be cut is mounted.
The portion corresponding to the sheet mounting table 8 is appropriately deformed by the pressing force.

The slider 9 and the bearing 4 and the bearing 5 and the bracket 10 may be integrated.
Although not shown, the slider 9 and the bracket 10
Are connected through the outside of the rotary blade 3.

Next, the operation of this embodiment will be described. When cutting the sheet 20 placed on the sheet placing table 8, the rotary blade 3 is rotated by being given a driving force from a driving source (not shown),
The slider 9 moves in the direction of arrow A in FIG. Since the rail 11 and the sheet mounting table 8 are arranged at a certain interval, the ring 7 fitted on the outer periphery of the rotating wheel 6 is appropriately deformed and pressed on the sheets on both sides of the escape groove 8a, The sheet is cut by the rotating blade while the rotating wheel 6 rolls with the movement of the slider 9.

In FIG. 3, reference numeral 7a denotes a sheet contact surface of the ring 7 at that time, 3a denotes a cross section of the rotary blade 3 on the same plane as the sheet 20, and 3b denotes a position of a tip of the rotary blade 3 in the traveling direction. . FIG. 4 shows a cutting model in which the sheets on both sides of the escape groove 8a are pressed as indicated by arrows, and the center portion is cut by the rotary blade 3.

The rotary blade 3 may be driven by a motor or the like, or the movement of the slider 9 may be transmitted to the drive shaft 1 via a rack and a pinion. May be based on the relative movement difference between the two.

When the cutting is completed, the slider is returned to the origin by detecting an end signal or the like to prepare for the next operation. The rotating blade upon returning may or may not rotate.

In this embodiment constructed as described above, since the fixed blade is not used, the structure of the cutting device is simple, and
The number of parts is small, and it can be provided at a lower cost than conventional ones.

[0017]

As described above, according to the present invention,
The rotating wheel rolls while holding both sides of the cutting line in the vicinity of a soft and non-slip ring, and the center is cut only with the rotating blade.There is no fixed blade, so there is no fixed blade. In addition, the relative positional accuracy between the rotary blade and the fixed blade does not affect the sharpness quality, the structure is simplified, and the cutting device can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a sheet cutting apparatus of the present invention.

FIG. 2 is a diagram showing an eccentric positional relationship between a rotary blade and a rotary wheel according to one embodiment of the present invention.

FIG. 3 is a diagram showing a positional relationship between a sheet pressing surface of a ring and a rotary blade at the time of cutting according to an embodiment of the present invention.

FIG. 4 is a diagram showing a model for cutting a sheet with a rotary blade according to the present invention.

FIG. 5 is a view showing a model in which a sheet is cut by a conventional rotary blade and a fixed blade.

[Explanation of symbols]

1 ... drive shaft, 3 ... rotating blade, 4, 5 ... bearing, 4a
… Eccentric shaft, 6… rotating wheel, 7… ring, 8… seat mounting table, 8a… relief groove, 9… slider,
11… rails, 20… seats.

Claims (1)

(57) [Claims] A traveling body that reciprocates along a guide member, a pair of bearings provided on the traveling body, and a rotary blade rotatably supported on both sides by the pair of bearings;
A drive shaft that rotates by receiving a driving force, and a pair of rotatably mounted eccentric shafts that are disposed adjacent to both sides of the rotary blade and are eccentrically provided with the drive shaft on the pair of bearings. A rotating ring, a soft ring fitted on the outer periphery of the rotating ring, and a sheet mounting table having a clearance groove of a cutting edge of the rotary blade and mounting a sheet to be cut, the sheet mounting table comprising: When the sheet placed on the rotating blade is cut, the ring fitted on the outer periphery of the rotating wheel presses while rolling on the sheet on both sides of the clearance groove with the movement of the traveling body, and the rotation of the rotary blade A sheet cutting apparatus characterized in that the sheet is cut by a sheet.