JPH0919886A - Sheet cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut a sheet by a full cut and partial cut even though a motor remains rotating in the same direction by furnishing a means to change the mounting position for the shaft of a link, which transmits the motor rotation to a movable blade so that it makes specified motions, and also a means to change the moving distance of a drive pin of this blade. SOLUTION: The positions of a shaft 6 and round hole 33 as the fulcrum of a link are set on the left of a long hole 51 for the shaft and fixed, and when a pin 21 furnished on a rotor 2 is rotated from the standby position which is the upper dead point, the link 3 swings and the pin 21 depresses a movable blade 4 in the direction of cutting in such a condition as positioned at the right end of an irregularly shaped long hole 31 so that the full cut mode is established. Because a difference is produced in the stroke of the movable blade 4 in an amount corresponding to the level difference δ between the left and right ends of the irregularly shaped long hole 31, the partial cut mode can be established by rotating the rotor 2 while the position of the round hole 33 is fixed on the right of the long hole 51.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet cutting device for cutting a roll paper or a folded continuous sheet to a desired width with a full width or a partial cut 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
The sheet material cutting device, which is widely used for mini-printers of 100 mm or less, is functionally capable of only full width cutting (hereinafter referred to as full cut) for cutting the entire length of the sheet material from one end to the other end. Those mainly capable of only partial cutting (hereinafter referred to as partial cuts), for example, one or both of perforations, chain-lined end portions, and a portion that is not cut in the central portion and the like, and the above-mentioned full cut and partial There are demands for three types of cutting devices, one capable of cutting while selecting two types of cutting. A cutting device that can select two types of cutting, full cut and partial cut, mainly adjusts the drive amount of the movable blade, and in the case of full cut, the movable blade cuts across the fixed blade across the width of the sheet. In the case of partial cutting, it is usual that a part of the movable blade does not intersect with the fixed blade. As a method of controlling the drive amount of the movable blade, one of them is not equipped with a drive source in the cutting device, and a plunger solenoid mounted on the printer main body side is used to reciprocate the movable blade by exciting the solenoid. There are those that cut the sheet material, and those that control the stroke of the plunger of the solenoid so that two types of cutting, full cut and partial cut, can be selected are adopted.

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, FIG. 7 shows the main part of the drive mechanism of the cutting device described in JP-A-6-47696. In this cutting device, in a slide type sheet material cutting device in which a movable blade moves in a direction substantially perpendicular to a sheet material to cut a sheet, either a crank mechanism or a four-bar linkage mechanism is used. Two types of full cut and partial cut are provided so that the rotational force of the drive source rotating in opposite directions can be converted into reciprocating motion and transmitted to the movable blade, and the stroke of the movable blade can be controlled according to the rotational direction of the drive source. You can choose to disconnect.

In recent years, as a method of using a sheet cutting device that can select full cut and partial cut,
There has been a need for a cutting method in which either a full cut or a partial cut is continuously performed for a relatively long period of time, and then the cutting method is switched, and either of the cutting is continued for a long period of time. There is also a demand for a cutting device that can be fixed to either full cut or partial cut before or immediately after it is installed in a printer, etc. Has become.

[0005]

A sheet material cutting device which has been widely used in mini-printers such as ticket vending machines and cash registers in recent years has 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. Control mechanism (For example, two plunger solenoids are used, one solenoid drives the movable blade,
The other solenoid must act as a stopper that controls the stroke of the former plunger solenoid), and the entire drive unit has a complicated structure and requires a large space. It had the drawback of being difficult to mount.

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. The control of the rotation direction and the rotation amount of the small motor requires two or more sensors for detecting the position of the movable blade when full cutting or partial cutting 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, in the cutting device described in Japanese Patent Laid-Open No. 6-47696, in a sheet material cutting device in which a movable blade moves in a direction substantially perpendicular to a sheet, a swing motion of a link and a longitudinal direction of the link are performed. By giving a moving motion for advancing and retreating to and from, the deformed hole provided in the center 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 detecting sensor is used and the drive control circuit is simplified.

However, the cutting device disclosed in Japanese Utility Model Laid-Open No. 63-16138 and Japanese Patent Application Laid-Open No. 6-47696 described above,
Both must rotate the motor in both forward and reverse directions, and in addition, the cutting device of No. Sho 63-16138 switches between full cut and partial cut by adjusting the amount of rotation of the motor. Therefore, the motor control circuit becomes complicated. Further, in the cutting device of JP-A-6-47696, the structure for adjusting the stroke of the movable blade by moving the link for transmitting the driving force to the movable blade left and right according to the rotation direction of the motor, When the force becomes large, that is, when the sheet becomes thick, the link may move naturally.

Therefore, when the stroke of the movable blade is reduced and full cutting is attempted, cutting of the entire width of the sheet cannot be performed and uncut portions occur, and when partial cutting is desired, the amount of uncut portions increases. May occur. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a cutting device in which the stroke of a movable blade can be adjusted even when the motor is rotated only in one direction and the control circuit of the motor is simplified.

[0010]

SUMMARY OF THE INVENTION Therefore, the present invention is a cutting device having two types of cutting functions of full cut and partial cut, and in order to solve the above-mentioned problems, the fulcrum position of the link is manually set. It is possible to select between full cut and partial cut by making it possible to change to. Another object of the present invention is to have a structure in which the motor is rotated in the same direction as when cutting even after the end of cutting so as to return the movable blade to the standby position. Furthermore, both full cut and partial cut are performed in the same direction. It is possible to simplify the drive control circuit by rotating the blade, and to provide a simple cutting device having only one sensor for detecting the position of the movable blade.

As a method of controlling the stroke of the movable blade at the time of full cutting and at the time of partial cutting, the drive amount of the motor which is the drive source or the rotation direction of the motor (normal rotation
Controlling the (reverse rotation) complicates the control circuit, so a structure that can change the stroke of the movable blade required for full cut and partial cut without rotating the motor drive amount only by rotating the motor in one direction is used. investigated. As a result, in a sheet cutting device including a fixed blade, a movable blade that slides on the fixed blade to cut the sheet, and a link that converts the rotation of the motor into a reciprocating motion to drive the movable blade, a spindle that supports the link. By inserting the shaft into the long hole for the spindle provided in the frame and fixing the spindle at an arbitrary position of this slot, the position of the spindle can be made variable and the fulcrum position of the link and the drive pin of the movable blade The moving distance can be changed and the stroke of the movable blade can be controlled, thus completing the present invention.

That is, the first aspect of the present invention is a sheet cutting apparatus for cutting a sheet by sliding a fixed blade and a movable blade on each other so that the movable blade has a variable sliding stroke length with respect to the fixed blade. A sheet cutting apparatus comprising: means for varying a spindle mounting position of a link for transmitting the rotation of a motor to the movement of the movable blade; and means for varying a moving distance of a drive pin of the movable blade. Is.

According to a second aspect of the present invention, a fixed blade, a movable blade that slides on the fixed blade to cut a sheet, a rotor that transmits the rotation of a motor to a link, and a drive pin of the movable blade are inserted. For a support shaft having a deformed elongated hole, supported by a support shaft, converting the rotation of the motor into reciprocating motion to drive the movable blade, and the support shaft supporting the link is fitted. A seat comprising a frame having an elongated hole, wherein the support shaft is fixed at an arbitrary position of the elongated shaft hole for adjusting the stroke of the movable blade according to full width cutting or partial cutting of the sheet. It is a cutting device. The deformed elongated hole referred to in the present invention only needs to have two or more drive pins fitted in the longitudinal direction of the link, and a shape having a step in the width direction of the link, that is, the moving direction of the movable blade is suitable. Is. The motor for driving the movable blade is characterized by rotating only in one direction. Therefore, there is an advantage that the control of the motor is easy.

Among the above, the link for driving the movable blade is
A long hole into which a pin fixed to the rotor is inserted at a position away from the rotation axis of the rotor at its one end, a round hole into which a support shaft is inserted at the other end, and a substantially central portion in the longitudinal direction of the link By providing the deformed elongated hole into which the drive pin fixed to the movable blade is fitted, the stroke of the movable blade can be reliably adjusted. Further, the deformed elongated hole provided substantially in the center in the longitudinal direction of the link has a substantially L-shape, a substantially triangular shape, or a slant in the longitudinal direction of the link that causes a step in the width direction of the link at the left and right ends of the deformed elongated hole. If the stroke of the movable blade is changed according to the position of the drive pin in the modified elongated hole, the modified elongated hole can be selected according to the size and shape of the link.

Means for varying the moving distance of the drive pin of the movable blade of the present invention will be described with reference to the embodiment of FIG.
This is achieved by the deformed elongated hole 31 formed in the link 3. That is, the vibration stroke length of the movable blade 4 can be changed by moving the drive pin up and down in the narrow width of the modified elongated hole or by moving the drive pin up and down in the wide width of the modified elongated hole. On the other hand, the means for changing the fulcrum mounting position of the link is achieved by the support shaft elongated hole 51 formed in the frame 5, as described in the embodiment of FIG. That is, an arbitrary position of the support shaft elongated hole 51 may be selected in accordance with the position setting of the vertical drive pin, the support shaft 6 may be fixed to the frame 5, and the link may be rotatably or rotatably fitted to the support shaft. Of.

The cutting device of the present invention switches the cutting method after performing either full cutting or partial cutting for a long period of time, or performs full cutting or partial cutting before or immediately after mounting the cutting device on a printer or the like. It is intended to be fixed to one of the cuts. Since it is not necessary to switch between full cut and partial cut frequently, select full cut or partial cut according to the purpose of the cutting device in advance, and manually move the position of the link support shaft. Just fix it.

[0017]

According to the present invention, the rotor is rotated only in one direction with the rotation direction of the motor as one direction, and the movable blade is driven in the cutting direction from the top dead center in the connection between the rotor and the link. With the structure in which the movable blade is returned to the standby position while the rotor is rotating in the same direction from the dead point, and the supporting shaft that is the fulcrum of the swinging link is moved to a predetermined position and then fixed, Full cut and partial cut can be selected. A pin having a preset radius of gyration is fixed on the rotor driven by the motor at a position away from the axis of the rotor. A long hole provided at one end of the link is slidably fitted into the pin to connect the rotor and the link, and the rotation of the rotor causes the link to swing about the support shaft. The other end of the link is provided with a round hole into which the support shaft is fitted, and the central portion is provided with a deformed elongated hole for transmitting the driving force to the movable blade.
The deformed elongated holes for transmitting the driving force to the movable blade are formed in a shape with a step set at the left and right ends in the moving direction of the movable blade, and the stroke of the movable blade is controlled by this step to achieve full cut and partial cut. Cut can be selected.

On the other hand, the movable blade is provided with a drive pin substantially in the center thereof, and the drive pin is fitted into the deformed elongated hole of the link. With the structure of the crank mechanism having such a structure, the stroke of the movable blade varies due to the rotational movement of the rotor by changing the positional relationship between the deformed elongated hole and the drive pin by changing the support shaft position of the link. is there. In FIG. 2, when the position of the support shaft is fixed to the right side in the support shaft elongated hole of the frame and the rotor is rotated in the direction of the arrow so that the position of the drive pin in the deformed elongated hole becomes the full cut position, the drive pin is rotated. Is moved by being pushed by the upper surface of the narrow part of the step of the odd-shaped slot
When the link reaches bottom dead center, the movable blade gains L1 stroke. Further, as shown in FIG. 3, when the position of the support shaft is fixed to the left side of the long hole of the frame to perform a partial cut, the drive pin is pushed by the upper surface of the wide step of the odd-shaped long hole and is The journey is obtained. Full cut and partial cut are controlled by the difference between the strokes of L1 and L2.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to embodiments and drawings. FIG. 1 is a front view showing an embodiment of the sheet cutting device of the present invention. As a drive source, a pin 21 having a preset radius of rotation is fixed on a rotor 2 which is rotated by the drive of a motor 1. Further, the link 3 has a pin 21 slidably fitted into one end thereof, and is fixed to a pin long hole 32 longer than the rotation diameter of the pin 21 and a spindle long hole 51 provided in the frame 5 at the other end. A round hole 33 into which the supporting shaft 6 is fitted, and a deformed elongated hole 31 for transmitting a driving force to the movable blade 4 are further provided in the central portion, and the deformed elongated hole 31 is fixed to the movable blade 4. The drive pin 41 is fitted. The deformed elongated hole 31 for transmitting the driving force to the movable blade 4 has a preset step δ in the moving direction of the movable blade 4, and the drive pin 41 provided on the movable blade 4 smoothly moves through the deformed elongated hole 31. The size and shape are possible.

Next, the assembling condition of the vicinity of the support shaft for swingably supporting the link 3 will be described. As shown in FIG. 4, the support shaft 6 is provided with a flange-shaped projection in the center thereof, and the portion fitted into the support shaft elongated hole 51 is formed slightly shorter than the thickness of the frame 5. Then, after the support shaft 6 is fitted into the support shaft long hole 51, a screw is screwed in from the end surface of the support shaft, and the support shaft 6 is fixed by the frictional force between the flange portion and the screw described above. The round hole 33 of the link 3 is slidably fitted into the support shaft 6,
A tooth ring is used to prevent the link 3 from coming off the support shaft 6.

On the other hand, since the movable blade 4 needs to be brought into cross-pressure contact with the fixed blade 7, a slider (not shown) is provided at the center of the movable blade 4, and the slider is fitted in the frame 5 so as to slide. A fitting hole is provided so that the fixed blade 7 and the movable blade 4 intersect. Further, the cutting edge of the movable blade 4 is a V-shaped recessed groove 42 having a groove depth ε (<δ) in the center.
Had been processed. Further, with such a structure, the positions of the round hole 33 and the support shaft 5, which are the fulcrum of the link, are set on the left side of the support shaft elongated hole 51 and fixed to the rotor 2 as shown in FIG. When the pin 21 is rotated from the standby position which is the top dead center, the link 3 swings and at the same time the pin 21 is positioned at the right end of the deformed elongated hole 31 to push down the movable blade 4 in the cutting direction to make a full cut.

Since the stroke of the movable blade 4 causes a step difference δ between the left end and the right end of the deformed elongated hole 31, the position of the round hole 33 is fixed to the right side of the elongated shaft hole 51 for rotating the rotor 2. Partial cutting is possible. With such a structure, even when the rotor 2 is rotated in the same direction at the time of full cutting and at the time of partial cutting,
The stroke of the movable blade can be controlled. 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, FIG.
As shown in FIG. 3, it may be a substantially triangular shape or a long hole shape inclined in the longitudinal direction of the link.

[0023]

As described above, according to the present invention, in a cutting device having two types of cutting functions of full cut and partial cut, a deformed elongated hole is provided in a link and a drive pin of a movable blade is fitted therein. By selecting the fulcrum position of the link according to the cutting specifications, full cut and partial cut can be performed even in the same rotation direction of the motor. As a result, unlike the conventional case, a large drive source such as a plunger solenoid is not required, and only one sensor for detecting the position of the movable blade is used, and control of the rotation direction of the motor is also unnecessary. Therefore, a cutting device with a simplified control circuit is provided. Can be provided. In addition, for example, even when cutting thick paper, there is an effect that it is possible to solve the problem that the link is not pressed by the coil spring so that a full cut is intended but a partial cut is made.

[Brief description of the drawings]

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

FIG. 2 is a conceptual diagram showing a state of a position of a link when a sheet is fully cut according to a sheet cutting apparatus of the present invention.

FIG. 3 is a conceptual diagram showing a situation of a position of a link when a sheet is partially cut according to a sheet cutting apparatus of the present invention.

FIG. 4 is a conceptual diagram showing an assembly state near a support shaft that supports a link, according to the sheet cutting apparatus of the present invention.

FIG. 5 is a view showing another shape of the deformed elongated hole provided near the center of the link in the sheet 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 rotors, 21 pins, 3 links, 3
1 odd-shaped long hole, long hole for 32 pins, 33 round hole, 4 movable blades, 41 drive pin, 42 notch groove, 5 frame, 5
1 long hole for spindle, 6 spindles, 7 fixed blades

Claims (5)

[Claims] 1. A sheet cutting device for cutting a sheet by sliding a fixed blade and a movable blade on each other, wherein the movable blade rotates a motor so that the sliding stroke length relative to the fixed blade is variable. A sheet cutting apparatus comprising means for varying a support shaft mounting position of a link transmitted to the movement of the movable blade and means for varying a moving distance of a drive pin of the movable blade. 2. A fixed blade, a movable blade that slides on the fixed blade to cut a sheet, a rotor that transmits the rotation of a motor to a link, and a deformed elongated hole into which a drive pin of the movable blade is fitted. A frame having a support shaft supported by a support shaft and converting the rotation of the motor into a reciprocating motion to drive the movable blade, and a support shaft elongated hole into which the support shaft supporting the link is fitted; A sheet cutting apparatus, which adjusts the stroke of a movable blade by fixing the support shaft at an arbitrary position of the support shaft elongated hole in accordance with full width cutting or partial cutting of the sheet. 3. The sheet cutting device according to claim 1, wherein the motor that drives the movable blade rotates in only one direction. 4. A link for driving a movable blade has a long hole into which a pin fixed to the rotor is inserted at one end thereof at a position away from the rotation axis of the rotor, and a spindle is inserted into the other end. 3. The sheet cutting device according to claim 1, wherein a round hole and a deformed elongated hole into which a drive pin fixed to the movable blade is fitted are provided at a substantially central portion in the longitudinal direction of the link. 5. The deformed elongated hole provided substantially 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, which forms a step in the width direction of the link at the left and right ends of the deformed elongated hole. The sheet cutting device according to claim 2 or 3, wherein the stroke is a long hole inclined in a direction, and the stroke of the movable blade changes according to the position of the drive pin in the odd-shaped long hole.