JPH0857795A - Sheet material cutting device - Google Patents

Abstract

PURPOSE: To shorten the width direction dimension of a cutting device by a large margin by mounting a disc blade holding base with its own driving means. CONSTITUTION: When a motor 7 is rotated, a disc blade holding base 3 moves from the right to the left of a cutting device, and sheet material 10 is cut in the cooperation of a disc blade 1 and a fixed blade 2. After cutting, the polarity of the input power supply of the motor 7 is changed. The motor 7 is thereby rotated reversely to move the holding base 3 from the left to the right of the cutting device so as to cut the sheet material 10 again. Since the disc blade 1 moves in pressure contact with the fixed blade 21, rotary-driving force is automatically imparted to the disc blade 1 to rotate it by frictional force generated between the disc blade 1 and the fixed blade 21 without rotating the disc blade 1 forcibly so as to cut the sheet material 10 smoothly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention presses the blade edge of a disc blade to a fixed blade having a straight blade edge, or presses the blade edges of the disc blades together to reciprocate the blades left and right. ,paper,
The present invention relates to a sheet material cutting device that cuts cloth, film and the like.

[0002]

2. Description of the Related Art Structurally, a sheet material cutting device is mainly classified into a roller type, a rotary type, a guillotine type, a slitter type and the like, and an optimal structure is appropriately selected and used according to the application. Among them, there is also a roller type cutting device similar to a slitter type that presses the disc blade against a straight fixed blade to reciprocate the disc blade left and right, and freely rotates the disc blade by pressing force to cut it. Are known. This cutting device
Compared with the guillotine type and the rotary type, it is easy to reduce the size and weight of the structure, and the sound at the time of cutting is relatively small. Therefore, it has been widely used in recent years.

A conventional sheet material cutting device comprising a disc blade and a straight fixed blade is also called a roller type, and is slidable on a guide rail provided parallel to the longitudinal direction of the straight fixed blade. The disc blade is supported on the disc blade holding base held so that it can rotate freely. Then, the fixed blade and the disk blade of the disk blades pressed against each other move left and right by the driving force transmitted to the disk blade holder, and are inserted between the fixed blade and the guide rail. The cut sheet material.
As a cutting device having this structure, the one described in Japanese Patent Publication No. 50-24466 is known.

A slitter type sheet material cutting device comprising a pair of disc blades is mounted on a disc blade holding table slidably held by a guide rail provided parallel to the cutting direction.
A pair of disc blades are supported so that they can rotate freely and the tips of the blades are in pressure contact with each other. When the disc blade holder moves to the left and right and moves in the direction to be cut, both disc blades are rotated in the direction in which the sheet material is bitten to cut the sheet material. The cutting device of this structure is
The one described in JP-A-5-177585 is known.

A sheet material cutting device including a straight fixed blade and a disc blade or a disc blade and a disc blade cuts a sheet by moving the disc blade left and right as described above. As a method of moving the disc blade to the left and right, generally, a pulley is provided at both ends of the cutting device, a wire or a timing belt is attached to the pulley in a ring shape, and a drive source is connected to one pulley to rotate the pulley. Therefore, a method of moving a movable blade holding table connected to a wire or a timing belt is often used.

[0006]

In recent years, facsimiles, printers, etc. equipped with a sheet material cutting device have been downsized,
Lighter weight and lower prices are required. Along with this, the sheet material cutting device also needs to be reduced in size, weight, and cost, and various measures have been taken. Most of the sheet materials to be cut in facsimiles are thermal recording papers having a thickness of about 50 to 60 μm, but in recent years, there is a tendency to improve the quality of sheet materials, and sheet materials to be cut have a thickness of 70 to 70 μm. There has been a demand for a sheet material cutting device capable of cutting thick paper such as thermal recording paper having a thickness of about 90 μm and plain paper.

Further, in recent years, sheet material cutting devices mounted on printers and other devices tend to have a price priority over durability. Further, not only thermal recording paper but also printing paper, label paper, film, etc. There is also an increasing demand for small cutters that can be cut. Then, it has been found that the roller type cutting device is most suitable for the sheet material cutting device which can meet such requirements.

However, the roller type sheet material cutting device comprising a disc blade and a straight fixed blade, or a disc blade and a disc blade, as described above, moves the movable blade holding base to the left and right, A wire or timing belt wound around pulleys provided at both ends is used, and the movable blade holder moves as the pulleys are driven to rotate. For this reason, pulleys must be provided at both ends of the cutting device corresponding to both sides of the cutting range.Therefore, even if an attempt is made to reduce the width of the cutting device in order to reduce the size of the cutting device, a limit naturally occurs and the width direction However, there was a problem that the size of could not be reduced. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the conventional cutting device and to provide a relatively compact sheet material cutting device in which the width of the cutting device is not much larger than the required cutting range.

[0009]

DISCLOSURE OF THE INVENTION The inventor of the present invention eliminates pulleys provided at both ends of a sheet material cutting device for cutting a sheet material with a disc blade and a straight fixed blade, or two disc blades. If possible, the volume occupied by the pulley becomes unnecessary, and as a result of various studies focusing on the fact that the size in the width direction can be reduced as much as the rotary type cutting device,
It is an invention made. That is, by directly attaching the driving motor to the movable blade holder, and moving the movable blade, the driving motor, and the movable blade holder together left and right,
It was found that the roller type cutting device can be downsized.

That is, according to the first aspect of the present invention, a disc blade holder mounted movably on a guide rail arranged in parallel with a sheet cutting direction, and a shaft rotatably mounted on the disc blade holder. The disc blade is composed of a supported disc blade and a mating blade that is pressed against the disc blade, and the disc blade holding base is equipped with a driving means of the disc blade holding base itself. A holding material is driven, and the sheet material cutting device is characterized in that the second invention is a straight blade edge line in which a mating blade that cuts the sheet material in cooperation with the disc blade is parallel to the cutting direction of the sheet. A sheet according to the first aspect of the present invention, wherein the sheet is a fixed blade having a blade, or a second disk blade that is rotatably supported by a disk blade holder together with the fixed blade and moves simultaneously with the disk blade. It is a material cutting device.

[0011]

When the motor, which is the driving means directly attached to the disc blade holder, is rotated, the motor is substantially moved between the member fixed to the shaft of the motor and the guide rail or the member attached along the guide rail. A frictional force is generated, and the frictional force causes the disc blade holder to move in the cutting direction so that the disc blade and the fixed blade or the disc blades cooperate to cut the sheet material.
Then, when the sensor moves from the standby position to the opposite end, the sensor operates and stops the motor. The above-mentioned member to be attached to the shaft of the motor and the member to be attached to the guide rail have high reliability because there is no loss of driving force because the driving force is reliably transmitted in the combination of gear and rack, but it is a substitute for gear and rack. As the material, a cylindrical material having a frictional force such as rubber may be used, or this rubber material and a metal guide rail may be used.

When the next movement signal is input, the motor is rotated in the opposite direction to operate the disc blade holder to the first standby position to cut the sheet material or return it to the standby position without cutting. As described above, the sheet material cutting device according to the present invention directly mounts the motor or the like on the disc blade holding base without transmitting the driving force to the disc blade holding base via the pulley and the wire. Unlike the device, it is not necessary to provide a pulley around which the wire or the timing belt is wound outside the cutting range, so that the width direction can be shortened by that amount, that is, by the width of the pulley.

[0013]

The present invention will now be described in more detail with reference to the examples and the drawings. 1 and 2 are views for explaining an embodiment of the present invention, FIG. 1 is a perspective view of a cutting device, and FIG. 2 is a cross-sectional view of a disc blade holder. The frame 5 is made of sheet metal, is bent, and is parallel to the guide rail 51 integrally formed with the frame 5, and is a straight blade line 21a that is the mating blade 2.
A fixed blade 21 having a blade was attached. The disc blade holder 3 slidably mounted on the guide rail 51 is a holder A31.
And the holding table B32, the disk blade 1 is rotatably supported by the rotary shaft 4, and the blade edge is pressed against the fixed blade 21 by the spring 6. Holding stand A31 and holding stand B
Although not shown at 32, they are screwed.

Then, the rack 9 is attached to the guide rail 51. The motor 7 has a gear 8 attached to its rotary shaft, and is fixed to the holding table B32 so that the rack 9 and the gear 8 mesh with each other. By rotating the motor 7, the disc blade holder 3 moves from right to left of the cutting device in the drawing, and the disc blade 1 and the fixed blade 21 cooperate to cut the sheet material 10. After disconnection, the polarity of the input power source of the motor 7 is changed to
The sheet material 10 can be cut again by reversing and moving from the left to the right of the cutting device on the drawing. Further, when the movable blade moves from the left to the right in the drawing, the sheet material 10 may not be cut and simply returned to the standby position.
Since the disc blade 1 moves while being pressed against the fixed blade 21, the friction force generated between the disc blade 1 and the fixed blade 21 naturally causes the disc blade 1 to rotate without being forced to rotate. The rotation driving force is applied to rotate the sheet material 10, and the sheet material 10 can be smoothly cut.

According to the present invention, since the motor 7 is attached to the disc blade holder 3 and the disc blade holder 3 can be moved by the rack 9 and the gear 8, the cutting is performed to move the disc blade holder. It is not necessary to fix a pulley or a motor around which a wire or the like is circulated at both ends of the device, and a small space is provided in the operating range of the disc blade holding base 3 so that the width dimension of the cutting device is sufficient. The width of the minute cutting device can be shortened. As another method of directly transmitting the rotational force of the motor to the disc blade holder, a worm is attached to the rotary shaft of the motor, and a worm wheel corresponding to a rack is connected to the motor to attach the worm. Since the axis of 7 can be oriented parallel to the fixed blade 2, the size of the cutting device in the sheet material advancing direction can be reduced.

3 and 4 are views showing another embodiment of the present invention. In this embodiment, the disc blade 1 directly involved in the cutting of the sheet material and the mating blade 2 of the mating blades 2 are replaced by the second disc blade 22.
As a cutting device, it is very similar to a normal slitter type. Then, the motor 7 is mounted on the disc blade holder 3 that holds both the disc blade 1 and the second disc blade 22,
The disk blade, the second disk blade, and the motor are moved simultaneously. Therefore, it is possible to reduce the total width of the cutting device in the same manner as in the above-mentioned embodiment, and since the disc blade and the disc blade are directly in pressure contact with each other, a long fixed blade or the like becomes unnecessary, and the cost is reduced It is advantageous. Further, the gear 8 and the rack 9 for transmitting the rotational force of the motor to the disc blade holder are
It can be replaced with another coupling mechanism that generates frictional force against each other. For example, a rubber-like plate member may be attached to the guide rail 51, and a rubber pulley may be provided on the motor shaft so as to press the two together, or there may be a method of winding a wire having both ends fixed on the pulley attached to the motor. In this way, the sound generated when the cutting device is activated can be further reduced.

[0017]

As described above, according to the present invention,
Since the pulleys at both ends of the cutting device, which are required in the conventional cutting device, can be eliminated, the widthwise dimension of the cutting device can be significantly reduced. Therefore, since the present invention can shorten the dimension in the longitudinal direction, which has been an important problem that cannot be avoided in this type of cutting device, the problem of securing an extra space is eliminated. It is possible to provide a sheet material cutting device capable of expanding the range of use. As a result, it is possible to contribute to downsizing of a sheet material processing apparatus such as a facsimile or a plotter equipped with the sheet material cutting apparatus of the present invention, and its industrial value is very high.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a sheet material cutting device of the present invention.

FIG. 2 is a sectional view of FIG. 1 showing an embodiment of the sheet material cutting device of the present invention.

FIG. 3 is a perspective view showing another embodiment of the sheet material cutting device of the present invention.

FIG. 4 is a side view of FIG. 3 showing another embodiment of the sheet material cutting device of the present invention.

[Explanation of symbols]

1 Disc Blade, 2 Counter Blade, 21 Fixed Blade, 21a Cutting Edge Line, 22 Second Disc Blade, 3 Disc Blade Holding Base, 31 Holding Base A, 32 Holding Base B, 33 Holding Base C, 4 Rotation Spindle ,
5 frames, 51 guide rails, 6 springs, 7 motors, 8 gears, 81 intermediate gears, 9 racks, 10 sheet materials

[Procedure amendment]

[Submission date] February 13, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

That is, according to the first aspect of the present invention, a disc blade holder mounted movably on a guide rail arranged in parallel with a sheet cutting direction, and a shaft rotatably mounted on the disc blade holder. The disc blade is composed of a supported disc blade and a mating blade that is pressed against the disc blade, and the disc blade holding base is equipped with a driving means of the disc blade holding base itself. A holding material is driven, and the sheet material cutting device is characterized in that the second invention is a straight blade edge line in which a mating blade that cuts the sheet material in cooperation with the disc blade is parallel to the cutting direction of the sheet. The fixed blade having the above, or a second disc blade which is rotatably supported by a disc blade holding base together with the disc blade and moves simultaneously with the disc blade. It is a sheet material cutting device.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

3 and 4 are views showing another embodiment of the present invention. In the present embodiment, the blade directly involved in the cutting of the sheet material is the disc blade 1 and the mating blade 2 is the second disc blade 22, and the cutting device resembles a normal slitter type. Then, the motor 7 is mounted on the disc blade holder 3 that holds both the disc blade 1 and the second disc blade 22, and the disc blade holder, the disc blade,
The structure is such that the second disc blade and the motor are moved simultaneously. Therefore, it is possible to reduce the total width of the cutting device in the same manner as in the above embodiment, and since the disc blade and the disc blade are directly in pressure contact with each other, a long fixed blade or the like is unnecessary,
It is cost effective. Further, the gear 8 and the rack 9 for transmitting the rotational force of the motor to the disc blade holder can be replaced with another coupling mechanism that generates frictional force with each other. For example, attach a rubber-like plate to the guide rail 51,
A rubber pulley may be provided on the motor shaft to press them together, or there may be a method of winding a wire having both ends fixed on a pulley attached to the motor. In this way, the sound generated when the cutting device is activated can be further reduced.

Claims (2)

[Claims] 1. A disc blade holder movably mounted on a guide rail arranged parallel to the sheet cutting direction, and a disc blade rotatably supported by the disc blade holder. The disc blade holding base is equipped with a driving means of the disc blade holding base itself to drive the disc blade holding base. Characteristic sheet material cutting device. 2. A counter blade that cuts a sheet material in cooperation with a disc blade has a fixed blade that has a straight cutting edge line parallel to the cutting direction of the sheet, or rotates together with the fixed blade to a disc blade holder. The sheet material cutting device according to claim 1, wherein the sheet material cutting device is a second disc blade that is freely pivotally supported and moves simultaneously with the disc blade.