JPH0919885A - Sheet cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut a sheet material which is rather thick by a full cut and partial cut by furnishing a dimple at each end part of a slit for the shaft of a link, and allowing the shaft to drop into the dimple so that the desired cutting system is maintained, i.e., either the all-width cut or partial cut. SOLUTION: A slit 3c is provided for fitting of the rotary shaft 5a of a link 3, and dimples 3d are provided at the ends of this long hole 3c so that the shaft drops in. When a rotor 2 rotates counterclockwise, the link 3 performs only the swinging/rotating motions until the cutting end position (lower dead point of link 3) is reached, and does not make motions to the left and right. No transition to the partial cut is made on the way of the full cut process because resistance is set so as to hinder the link 3 from moving right by a previously furnished spring 5b and the shaft 5a dropping into dimple 3d.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet material cutting device for full-cutting or partial-cutting a roll paper or a folded continuous paper to an arbitrary length in a recording device such as a printer.

[0002]

2. Description of the Related Art The width of sheet materials such as ticket vending machines and registers is generally
Sheet material cutting devices that are often used in mini-printers of 100 mm or less, etc. are functionally only capable of cutting the entire width of the sheet material (hereinafter referred to as full cut), mainly for example partial cutting in perforations (hereinafter partial cut). Called)), and those that can be cut while selecting the above two types of cutting, full cut and partial cut,
There are three types of cutting devices required. A cutting device that can select two types of cutting, full cut and partial cut, mainly needs to adjust the drive amount of the movable blade, but one of the drive control methods for the movable blade is to use the drive source as the cutting device. There is a type that cuts the sheet material by using a plunger solenoid mounted on the printer body side instead of mounting it and energizing the solenoid to reciprocate the movable blade.The stroke of the solenoid plunger is controlled to make a full cut. The one that allows you to choose between two types of cutting is used.

One of the cutting devices themselves equipped with a drive source is one using a small motor as disclosed in Japanese Utility Model Laid-Open No. 63-16138 whose outline is shown in FIG. It is known that a rotary blade is converted into a reciprocating motion via a rack and a pinion to reciprocate a movable blade.
In the case of the drive mechanism having this structure, two types of cutting, full cut and partial cut, can be selected by controlling the rotation direction and rotation amount of the small motor. Further, the cutting device described in JP-A-6-47696 is a slide type sheet material cutting device in which a movable blade moves in a direction substantially perpendicular to a sheet material to cut the sheet,
Using either the crank mechanism or the four-bar linkage,
The rotation force of the drive source that rotates in both forward and reverse directions is converted into reciprocating motion and transmitted to the movable blade, and the stroke of the movable blade can be controlled according to the rotation direction of the drive source. A cutting device capable of selecting a type of cutting is disclosed. FIG. 7 shows the main part of the drive mechanism in this cutting device.

[0004]

A sheet material cutting device which has been widely used in mini-printers such as ticket vending machines and cash registers in recent years is equipped with a drive unit and has two types of cutting functions, full cut and partial cut. In addition, there is an increasing demand for cutting devices that are more inexpensive and smaller and lighter.
In order to have a structure having two types of cutting functions of full cut and partial cut by the plunger solenoid as described above, in order to reciprocate the movable blade via the lever and further adjust the stroke of the plunger. A control mechanism (for example, two plunger solenoids are used, and one solenoid works as a stopper for controlling the stroke of the plunger solenoid for driving the movable blade) is required. There is a drawback in that the whole structure is complicated and requires a large space, and it becomes difficult to mount the driving unit on the cutting device.

A cutting device using a small motor as described in Japanese Utility Model Laid-Open No. 63-16138 converts the rotary motion of the small motor into reciprocating motion via a rack and a pinion to operate a movable blade. Although the cutting is performed by performing the cutting, the full cutting or the partial cutting is performed by controlling the rotation amount of the small motor. To control the rotation direction and amount of rotation of a small motor, two or more sensors are required to detect the position of the movable blade when full cut or partial cut is performed. Moreover, when converting the rotary motion to the reciprocating motion by the rack and pinion mechanism described above, it is necessary to control the forward rotation and the reverse rotation of the motor for both the full cut and the partial cut to perform the cutting operation and the returning operation. That is, both full cut and partial cut require the motor to rotate in the forward direction at the time of cutting, and to rotate in the reverse direction at the time of returning after completion of the cutting, which makes control of the motor very complicated. Further, when cutting a relatively thick sheet material, the motor needs to be large.

Further, the cutting device described in Japanese Patent Laid-Open No. 6-47696 is a sheet material cutting device in which a movable blade moves in a direction substantially perpendicular to a sheet, and a swinging motion of a link and a longitudinal direction of the link. By giving a moving motion for advancing and retreating to and from, the deformed hole provided in the central portion of the link is moved in the longitudinal direction of the link. With such a structure, the stroke amount of the drive pin of the movable blade fitted in the deformed hole can be changed, so that two types of cutting, full cut and partial cut, can be selected according to the rotation direction of the drive source. Is done. By adopting this structure, it is possible to provide a cutting device in which only one position detection sensor is used and the drive control circuit is simplified. However, in the cutting device having this structure, the link may move arbitrarily due to fluctuations in the cutting reaction force, so it is necessary to give a pressing force to the extent that the link does not move.

When the cutting reaction force set at the beginning becomes large, that is, when the sheet material becomes thicker than 100 μm, for example, even if a full cut is performed due to the above-mentioned phenomenon, a partial cut occurs. is there. The thicker the sheet material to be cut, the greater the cutting reaction force.Therefore, it is necessary to increase the pressing force to prevent the link from moving, but to increase the pressing force, the link shakes. If the strength of the spring provided on the moving shaft portion is increased, the operating force of the link is increased, and the load on the drive source is increased. That is, both of the above cutting positions had a structure unsuitable for cutting a thick sheet material.

[0008]

Therefore, the present invention has been made as a result of various studies in order to solve the above-mentioned problems that tend to occur particularly when the thickness of the sheet material to be cut is 100 μm or more. A slide-type cutting device in which a movable blade operates in a substantially vertical direction with respect to a sheet material to be cut, and after the cutting is completed, the motor is rotated in the same direction as when cutting, and the movable blade is returned to a standby position. The problem is solved in the cutting device having a structure in which the motor is fully cut when the motor is normally rotated in one direction and is partially cut when the motor is rotated in the opposite direction.

According to the present invention, when the thickness of the sheet material to be cut changes and the cutting reaction force increases, partial cutting is performed even if full cutting is performed. Therefore, the rotary motion of the motor is reciprocated by the movable blade. The long hole provided at one end of the link for converting into
With such a structure, it was possible to make a full cutting and partial cutting reliable cutting device even for thick sheet materials of 100 μm or more.

Specifically, the present invention specifically comprises a fixed blade,
A movable blade that slides while cross-contacting the fixed blade to cut the sheet material, a motor that can rotate in both forward and reverse directions to cut the sheet material in full width or partial cutting, and a long hole for a spindle at one end. In the sheet material cutting device including a link that converts the rotational movement of the motor into the reciprocating movement of the movable blade, the support shaft elongated hole of the link has dents at both ends,
The sheet material cutting device is characterized in that the support shaft falls into the recess to maintain full-width cutting or partial cutting. Then, the link has a support shaft elongated hole into which the support shaft is fitted at one end, a deformed hole into which a drive pin fixed to the movable blade is fitted into the center of the link in the longitudinal direction, and a rotor shaft center at the other end. It is characterized in that a pin fixed to one away from is fitted and provided with a pin elongated hole shorter than the rotation diameter of the pin.

Further, the deformed hole is a substantially L-shape, a substantially triangular shape, or an elongated hole inclined with respect to the longitudinal direction of the link so that a step is formed in the width direction of the link at the left and right ends of the deformed hole. It is characterized in that the reciprocating motion of the movable blade changes according to the rotation direction of the pin, and at the other end of the link, a long hole shorter than the rotation diameter of the pin fixed to the rotor is provided to rotate the pin. Thus, the link swings and moves so as to move back and forth in the longitudinal direction.

[0012]

Next, the operation of the present invention will be described with reference to FIG. The present invention has a structure in which when the motor 1 is rotated in one direction, a full cut is performed, and when the motor 1 is rotated in the opposite direction, a partial cut is performed. Even after the cutting is completed, the motor 1 is rotated in the same direction as the cutting direction without being reversed. This structure allows the movable blade to return to the standby position. In the present invention, a pin 2a having a preset radius of rotation is fixed on the rotor 2 which is rotationally driven by the motor 1. The link 3 for transmitting the driving force of the motor to the movable blade has the pin 2a described above at one end.
Is slidably fitted, and an elongated hole 3b shorter than the rotation diameter of the pin 2a is provided, and an elongated hole 3c into which the support shaft 5a is fitted is provided at the other end, and the movable blade 4 is driven near the center. A deformed hole 3a for transmitting force is provided.

The deformed hole 3a for transmitting the driving force to the movable blade 4 is formed in a shape having a step set in the moving direction of the movable blade 4 at both left and right ends, and the step causes the movable blade 4 to move.
The stroke is controlled and full cut or partial cut can be selected. The movable blade 4 is provided with a drive pin 4a which is fitted in the deformed elongated hole 3a of the link at the center thereof, and the drive force is transmitted. Such a link mechanism, that is, the elongated hole 3b provided at one end of the link 3 and into which the pin 2a fixed to the rotor 2 is fitted is made shorter than the rotation diameter of the pin 2a, so that the rotor 2 is rotated. The link 3 that swings moves at the same time as it swings to move forward and backward, so that the sheet material is cut and the stroke of the movable blade 4 is controlled. In FIG. 2, when the rotor 2 rotates counterclockwise in the drawing,
The link 3 is fixed by the pin 2a fixed to the rotor 2.
Swings and moves so as to be pulled to the left. When the link 3 moves to the leftmost side, the drive pin 4a provided on the movable blade 4 causes the deformed elongated hole 3 of the link 3 to move.
It is located at the right end of a and becomes a full cut.

At the same time, the support shaft 5a of the link 3 provided on the frame 5 is set so as to fall into the recess formed at the end of the support shaft elongated hole 3c provided at the other end of the link 3. . Then, the support shaft 5a of the link 3 falls into the recess, and the spring 5b that is externally fitted to the support shaft 5a and acts to prevent the link 3 from moving prevents the link 3 from moving. There is. As the cutting reaction force applied to the link 3 increases, the force for the support shaft 5b of the link 3 to escape from the recess increases, and the movement of the link 3 during cutting can be suppressed. It is possible to eliminate the problem that the stroke of changes and the control of full cut and partial cut becomes impossible. Therefore, the most characteristic point of the present invention resides in that recesses are provided at both ends of the elongated hole of the link into which the support shaft is fitted. With such a structure of the link, the above-described effects can be obtained. To be

When the rotor 2 further rotates to the left after the cutting, the cutting reaction force is removed, thereby reducing the output power, and the pin 2a on the rotor 2 fitted in the elongated hole 3b of the link 3 causes the link to move. 3 swings upward in the drawing, and at the same time, can move to the right, lifts the movable blade upward, and returns it to the standby position. Next, when the rotor 2 is rotated clockwise, the drive pin 4a of the movable blade 4 is located on the right side of the deformed elongated hole 3a of the link, so that the driving force is transmitted to the movable blade 4 by the level difference of the deformed elongated hole 3a. Since it is delayed, the stroke of the movable blade 4 is reduced and partial cutting is performed. Then, the partial cut can be surely performed in the same manner as the full cut described above.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments and drawings. FIG. 1 is a front view showing an embodiment of the sheet material cutting device of the present invention. A pin 2a having a preset radius of rotation is provided on a rotor 2 which is rotated by driving a motor 1 as a drive source. Further, the link 3 has a pin 2a slidably fitted to the other end thereof, and the pin 2a
A long hole 3b having a diameter smaller than the rotation diameter of the shaft, and a shaft 5 fitted in the other end and having a substantially U-shaped right recess 3d and a left recess 3e into which the shaft 5a is dropped at both ends. 3c, and a link 3 provided with a deformed elongated hole 3a for transmitting a driving force to the movable blade 4 via the drive pin 4a in the central portion, the link 4 and the rotor 2 are connected to each other via the pin 2a. Has been done.

The deformed elongated hole 3a of the link 3 for transmitting the driving force to the movable blade 4 is L so as to obtain a step δ corresponding to a desired stroke difference of the movable blade 4 at the time of full cutting and at the time of partial cutting. It has a letter shape. Also, the support shaft 5a
Is provided with a spring 5b for the purpose of giving a slight frictional resistance in the thrust direction of the link 3. On the other hand, the movable blade 4
Is a thin plate-shaped tool having a cutting edge with a V-shaped concave edge line, a slider (not shown) is provided in the center, and the movable blade 4 is shown in the drawing between the slider and the sliding surface of the frame 5. It is mounted so as to be able to move up and down, and has a structure for cutting the sheet material from both ends toward the center while cross-contacting with the fixed blade 6. Further, the cutting edge of the movable blade 6 is formed with a notch groove 4b having a groove depth ε (<δ) at the center of the V-shaped concave cutting edge.

With such a structure, the link 3 interlocks with the rotation of the rotor 2 and swings and rotates about the support shaft 5a, and at the same time moves to the left and right. As shown in FIG. 2, when the pin 2a provided on the rotor 2 rotates counterclockwise from the standby position which is the top dead center, the link 3 swings and rotates at the same time because the pin long hole 3b is shorter than the rotation diameter of the pin 2a. Move to the left. When the rotor 2 continues to rotate left, the pin 2 on the rotor 2
a, when the link 3 moves to a position where the rotation center of the rotor 2 and the support shaft 5a of the link are aligned, the link 3 is located on the leftmost side. Along with this, the drive pin 4a fitted in the L-shaped odd-shaped elongated hole 3a of the link 3 pushes down the movable blade 4 in the cutting direction while being positioned at the right end of the L-shaped odd-shaped elongated hole 3a.

At the same time, the rotation support shaft 5a of the link 3 is set so as to fall into a recess 3d provided at the end of the support shaft elongated hole 3c. When the rotor 2 further rotates counterclockwise, the link 3 is reached until the cutting end position (bottom dead center of the link 4).
Does not move in the right and left directions, and the support shaft 5a of the link 3 falls in the recess 3d and a spring 5b provided in advance provides resistance so as to prevent the link 3 from moving in the right direction. Since it has been set, it will not change to partial cut during full cut.
As the cutting reaction force on the link 4 increases, the link 3
The force of the support shaft 5a trying to escape from the recess 3d increases, and the movement of the link 3 during cutting can be suppressed. In other words, when the cutting reaction force applied to the link 3 increases, the force of the rotation support shaft 5 of the link 3 that attempts to escape from the recess 3d increases, which prevents the link 3 from moving and ensures a full cut. Can be

When the rotor 2 continues to rotate counterclockwise after the completion of cutting, that is, after the link 3 passes through the bottom dead center, the cutting reaction force is released, which reduces the above-mentioned output of the support shaft 5a, and the rotor 2 The upper pin 2a allows the link 3 to swing and rotate, and at the same time, can be easily moved to the right side to lift the movable blade 4 to the standby position. The stroke of the movable blade 4 at this time may be set so as to fully cut the sheet material. Next, as shown in FIG. 3, when the rotor 2 rotates to the right,
When the link 3 swings and moves to the right at the same time, and the pin 2a on the rotor 2, the rotation center of the rotor 2 and the support shaft 5a of the link 3 are aligned, the link 3 moves. It will be located on the far right.

An L-shaped odd-shaped elongated hole 3a provided in the link 3
The drive pin 4a of the movable blade 4 which is fitted in the position is located at the left end of the L-shaped deformed elongated hole 3a and pushes down the movable blade 4 in the cutting direction. At the same time, the spindle 5a of the link 3
Is set so as to fall into a recess 3e provided at the end of the support shaft elongated hole 3c. When the rotor 2 further rotates to the right, the link 3 does not move in the left-right direction at least until the cutting end stroke, and only the swinging rotation operation is performed. Since the stroke of the movable blade 4 is reduced by the amount corresponding to the step (δ) between the left end and the right end of the L-shaped elongated hole 4a, it is possible to partially cut the sheet material. As the cutting reaction force applied to the link 3 increases, the force that the rotation support shaft 5a of the link 3 tries to escape from the recess 3e increases, and the movement of the link at the time of cutting can be suppressed.

When the rotor continues to rotate to the right after the end of cutting, the cutting reaction force is removed, whereby the spindle 5
The output of a is also reduced, and the pin 2a on the rotor 2 allows the link 3 to swing and rotate, and at the same time, easily move to the left side to lift the movable blade to the standby position. With such a structure, in both cases of full cut and partial cut, the rotor 2 can be rotated in the same direction as at the time of cutting and the movable blade 4 can be returned even after the cutting is completed. That is, since it is not necessary to reverse the motor to return the movable blade, the device can be simplified. The driving method of the cutting device according to the present invention can be applied to a cutting device having a structure in which a movable blade having a sawtooth thin blade is pierced and penetrated into a sheet to make a full cut or a partial cut as shown in FIG. is there. In this embodiment, the deformed elongated hole provided in the link has an L-shape, but this hole may have any other shape as long as the stroke of the movable blade can be controlled according to the rotation direction of the motor. For example, as shown in FIG. 5, a substantially triangular shape or a long hole shape inclined in the longitudinal direction of the link may be used.

[0023]

According to the present invention, the deformed elongated hole is provided in the link to control the stroke of the movable blade, and after the cutting is completed, the motor is rotated in the same direction as in the cutting to return the movable blade to the standby position. In addition, when the motor is rotated in one direction, full cutting is performed, and when the motor is rotated in the opposite direction, full cutting is performed. In a cutting device having two types of cutting functions, the link swings forward and backward while moving. As a structure, a recess into which the support shaft falls is provided at both ends of a long hole into which a support shaft for supporting the link is fitted.
With such a structure, as the cutting reaction force applied to the link increases, the force with which the support shaft of the link escapes from the recess increases, and the movement of the link during cutting can be suppressed. As a result, it is possible to reliably cut the full cut and the partial cut of a thick sheet material of 100 μm or more. Then, it is possible to surely eliminate a defect that a partial cut is made even though a full cut is attempted.

Further, after the cutting is completed, the reaction force for cutting is removed, so that the escape of the spindle from the recess is reduced, the link can be easily moved without burdening the motor, and the movable blade is in the standby position. Can be returned to. The cutting device of the present invention uses the cutting reaction force at the time of cutting to prevent the movement of the link, and enables reliable full cutting and partial cutting of a thick sheet material of 100 μm or more, and burdens the rotation output of the motor when returning. It is possible to surely return the movable blade to the standby position without applying pressure.

[Brief description of the drawings]

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

FIG. 2 is a conceptual diagram showing an operating state of links and the like when a sheet material is fully cut in the sheet material cutting device of the present invention.

FIG. 3 is a conceptual diagram showing an operating state of links and the like when a sheet material is partially cut in the sheet material cutting device of the present invention.

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

FIG. 5 is a view showing another shape of the modified elongated hole provided near the center of the link in the sheet material cutting device of the present invention.

FIG. 6 is a conceptual diagram showing an example of a conventional slide-type sheet material cutting device.

FIG. 7 is a conceptual diagram showing a structure near a link of a conventional slide type sheet material cutting device.

[Explanation of symbols]

1 motor, 2 rotor, 2a pin, 3 link, 3
a odd-shaped long hole, 3b long hole for pin, 3c long hole for spindle, 3
d right side dent, 3e left side dent, 4 movable blade, 4a drive pin, 4b notch groove, 5 frame, 5a spindle,
5b Spring, 6 fixed blade

Claims (4)

[Claims] 1. A fixed blade, a movable blade that slides while cross-contacting the fixed blade to cut the sheet material, and a motor that can rotate in both forward and backward directions to cut the sheet material in the full width or partial cut. And a sheet material cutting device comprising a link having a spindle hole at one end and converting the rotational movement of the motor into the reciprocating movement of the movable blade, the spindle hole for the link is provided at both ends. A sheet material cutting device having a recess, wherein the supporting shaft is dropped into the recess to maintain a desired cutting method of full-width cutting or partial cutting. 2. A link for converting rotational movement of a motor rotatable in both forward and reverse directions into reciprocating movement of a movable blade, a support shaft elongated hole into which a support shaft is fitted at one end, and a substantially center in the longitudinal direction of the link. A deformed hole into which the drive pin fixed to the movable blade is inserted, and a pin fixed to a position apart from the shaft center of the rotor in the other end, and a pin long hole shorter than the rotation diameter of the pin The sheet material cutting device according to claim 1, further comprising: 3. The deformed hole provided approximately at the center in the longitudinal direction of the link has a substantially L shape, a substantially triangular shape, or the longitudinal direction of the link so that a step is formed at the left and right ends of the deformed hole in the width direction of the link. The sheet material cutting device according to claim 1 or 2, wherein the sheet material cutting device is an elongated hole inclined with respect to the direction, and the reciprocating motion amount of the movable blade changes according to the rotation direction of the motor. 4. The link has a long hole at the other end, which is shorter than the diameter of rotation of a pin fixed to the rotor, and the pin is rotated so that the link swings and moves in the longitudinal direction thereof. 4. The method according to claim 1, wherein
The sheet material cutting device described in.