JPH06210590A - Rolled paper cutting device - Google Patents

Abstract

PURPOSE:To solve such a problem that rolled paper is caught between a pair of cutting blades, without such a troublesome work that the cutting blades being manually returned to their original positions by the user. CONSTITUTION:A rolled paper cutting device in which a pair of cutting blades 3a, 3b are moved to and from each other by a torque of a drive motor M, and rolled paper P is cut by the meshing of the pair of cutting blades 3a, 3b, incorporates means for reversing the drive motor M so that the pair of cutting blades 3a, 3b which have approached together are moved away from each other with the motion reverse to that during cutting of the rolled sheet when the rolled paper P is caught between the pair of cutting blades 3a, 3b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll paper cutting device applied to cut roll paper such as thermal recording paper used in a facsimile machine or the like.

[0002]

2. Description of the Related Art Conventionally, as a roll paper cutting device incorporated in a facsimile machine, for example, one shown in FIG. 6 has been proposed. This conventional one is a roll paper P
Print head 1e and platen roller 2 for performing desired printing on
A pair of upper and lower cutting blades 3e, 3 is provided after the arrangement position of e.
f is provided, and the lower cutting blade 3f is fixed. On the other hand, the upper cutting blade 3e is provided so as to come into contact with and separate from the lower cutting blade 3f by a rotational force of a drive motor (not shown) along a locus as shown by a dashed line C in FIG. The roll paper P is cut by the engagement of the cutting blades 3e and 3f.

[0003]

However, in the roll paper cutting device as described above, due to the curl of the roll paper P supplied between the two cutting blades 3e and 3f, the paper quality, and other circumstances, For example, as shown in FIG. 7, both cutting blades 3
Roll paper P is caught between e and 3f, and roll paper P
May not be properly disconnected. When such a situation occurs, conventionally, the upper cutting blade 3e is simply lowered along the arrow A direction by the rotational force in one direction of the drive motor. Therefore, the roll paper P is moved between the cutting blades 3e and 3f. It will force you to bite more strongly. Therefore, conventionally, it becomes difficult to lower the upper cutting blade 3e below a certain height with the torque of the drive motor, the cutting blade 3e stops, and the upper cutting blade 3e is driven by the drive motor. It was not possible to return to the original initial position. As a result, conventionally, when the roll paper P is caught, the user opens the cover panel 70 of the facsimile apparatus, then grasps the upper cutting blade 3e, and forcibly pulls it up to roll it. The reality is that the paper P is not caught, and the work is very troublesome and inconvenient. Incidentally, when the above-mentioned bite occurs, it is often the case that a general user does not know how to deal with it. Normally, a serviceman is called to deal with the problem, but this serviceman also takes measures. In the end, similarly to the above, the upper cutting gear 3e is gripped and pulled up to forcibly eliminate the biting of the roll paper P.

The present invention has been proposed in view of the above points, and when the roll paper is caught between a pair of cutting blades, the user manually returns the cutting blades to the original state. It is an object of the present invention to eliminate the need for such troublesome work and to easily eliminate the jamming of roll paper.

[0005]

In a roll paper cutting device according to the present invention, which has been proposed to achieve the above object, a set of cutting blades are brought into contact with and separated from each other by a rotational force of a drive motor, and the cutting blades are bitten. A roll paper cutting device configured to cut roll paper by matching, when the roll paper is caught between the pair of cutting blades, the two cutting blades that are close to each other are It is provided with means for rotating the drive motor in the reverse direction so as to separate the roll paper in the direction opposite to the operation direction.

[0006]

In the roll paper cutting device according to the present invention having the above-mentioned structure, the roll paper is caught between the pair of cutting blades, and further cutting blades are generated in the normal rotation operation of the drive motor. When it becomes difficult to engage the gears, the drive motor can be rotated in the reverse direction. Thus, if the cutting blade is operated in the opposite direction to that when the roll paper is cut by the reverse rotation of the drive motor, unlike the case where the cutting blade is engaged by the forward rotation of the drive motor, the roll paper It is possible to separate the set of cutting blades with a small torque of the drive motor without being affected by the biting resistance of the cutting blade. Therefore, it is not necessary for the user to manually separate the meshed cutting blades.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of an essential part showing an example of a state in which a roll paper cutting device S according to the present invention is incorporated and used in a facsimile device F, and FIG. 2 is a roll paper cutting device S.
FIG. 3 is a perspective view showing the configuration of the main part of FIG. 3, and FIG. 3 is a sectional view taken along line XX of FIG. As shown in FIG. 1, the cutting device S is housed in a housing case of a facsimile device F, and prints a desired image on a roll paper P that is unwound from a winding roll Pa and used as recording paper. The head 1 and the platen roller 2 are provided on the rear side of the arrangement position.
As shown in FIG. 2, the cutting device S includes a pair of upper and lower cutting blades 3a and 3b, upper and lower supports 4a and 4b that support the cutting blades 3a and 3b, an upper support 4a and a cutting blade. 3a, a drive motor M for operating the drive motor M, a frame 5 for supporting the drive motor M and the upper and lower supports 4a and 4b, and other parts described later.

Of the above, the lower cutting blade 3b functions as a fixed blade, but the shaft portions 40, 40a at both ends of the support body 4b supporting this are rotatably supported by the side surface portions 50, 51 of the frame 5. And the spring 4 is attached to one of the shafts 40a.
2 is attached. With such a structure, when the upper cutting blade 3a approaches and press-contacts the lower cutting blade 3b, the cutting blade 3b resists the elastic force of the spring 42 and slightly escapes in the direction of arrow a in FIG. Is considered as. The upper cutting blade 3a functions as a movable blade, and the support body 4a supporting the movable blade is provided so as to rotate and swing with the shaft portions 43 and 43a at both ends supported by the frame 5 as fulcrums. ing. As shown in FIG. 2, the cutting blade 3a is tilted so that the relationship between the lower cutting blade 3b and the clearances H1 and H2 is H1 <H2, as shown in FIG. When the cutting blade 3a is lowered, the roll paper P may first be cut on one side edge P1 side and finally on the other side edge P2 side.

As an operating mechanism of the upper cutting blade 3a and the support 4a, an arm 6 continuously provided at one end of the support 4a, a long-hole-shaped cam groove 7 formed in the arm 6, and a drive motor M Cam pin (cam follower) 9 that meshes with the worm 8 fixed to the drive shaft of and is fitted into the cam groove 7.
What is constituted by the gear 10 etc. provided with is applied.
In such a mechanism, the cam pin 9 revolves due to the rotation operation of the drive motor M, and the arm 6 swings around the shaft portions 43 and 43a as a fulcrum. As a result, the tip end of the cutting blade 3a moves toward and away from the lower cutting blade 3b by operating along the locus shown by the one-dot chain line A in FIG. 3, and by the engagement of both cutting blades 3a and 3b, Roll paper P supplied between the two
Is configured to be disconnected. One step of the roll paper cutting operation by the operation of the cutting blade 3a is one step of the gear 10.
It is executed by rotation, and when the gear 10 makes one rotation, the cutting blade 3a returns to the original initial position. Further, on one side surface of the gear 10, there is provided a cam 12 having a flat notch 11 (or a convex) formed in a part of a circumferential portion thereof, and a cam switch 13 sensitive to the cam 12. . This cam mechanism is for detecting one rotation operation of the gear 10, and is set to output a predetermined ON signal when the gear 10 makes one rotation.

As shown in FIG. 1, the drive motor M and the cam switch 13 are connected to a motor drive controller 14. The motor drive control unit 14 not only controls the forward rotation and the stop operation of the drive motor M, but also performs the motor control so as to execute the reverse operation. Specifically, the main CPU (not shown) of the facsimile device F
When a predetermined control command for instructing the cutting of the roll paper is received from, the drive motor M is driven (normal rotation) at that time,
After that, when one step of cutting the cutting blade 3a is completed and a predetermined ON signal is received from the cam switch 13, the drive motor M is controlled to be stopped at that time. However, when the ON signal is not received from the cam switch 13 within a preset time after the driving of the drive motor M is started, a signal notifying that the cutting device S has an abnormality is transmitted to the CPU of the facsimile device F. At the same time, the drive motor M is controlled to rotate in the reverse direction. Further, when an ON signal is detected from the cam switch 13 after such a reverse rotation operation, the drive motor M is controlled to be stopped at that time.

When the CPU of the facsimile apparatus F receives the signal indicating the abnormality from the motor drive control unit 14, the CPU of the facsimile apparatus F executes a predetermined operation described later for coping with the cutting failure of the roll paper P. Is configured to execute control of each part of the facsimile device F.

Next, an example of use and operation of the roll paper cutting device S having the above structure will be described. First, in normal times, when the print head 1 prints out an image of one page on the roll paper P, the CPU of the facsimile apparatus F sends a control command of a drive command to the motor drive control unit 14 to drive it. The motor M drives. This drive is gear 1
0 rotates once, and ends when the ON signal is output from the cam switch 13. By this one rotation operation of the gear 10, the cutting blade 3a attached to the upper support 4a comes into contact with and separates from the lower cutting blade 3b while drawing the locus A of FIG. Return to the initial position of and stop.

However, due to the curl of the roll paper P and other circumstances, the roll paper P cannot be cut and, for example, as shown in FIG. 4, the roll paper P is caught between the cutting blades 3a and 3b. There are cases. In this state, the cutting blade 3
As a is lowered by the drive rotation (normal rotation) of the drive motor M, the roll paper P is caught more strongly, so that it becomes difficult to lower the cutting blade 3a beyond a certain level, and the roll paper P is kept caught. Stop at an intermediate position. Therefore, originally, the gear 10 should make one rotation within a predetermined fixed time and the ON signal should be output from the cam switch 13. However, when the above-mentioned biting occurs, a fixed time after the drive motor M starts to drive. The ON signal is not output even after a lapse of time. Then, after the elapse of such a fixed time, the motor drive control unit 14 controls the drive motor M to rotate in the reverse direction. When the drive motor M is rotated in the reverse direction, the upper cutting blade 3a is not in the direction in which the roll paper P is bitten, but is in the upward direction (the direction of arrow b) away from the roll paper P and the lower cutting blade 3b. Since the driving force acts on the upper cutting blade 3a, the upper cutting blade 3a can be lifted by the torque of the driving motor M without being affected by the biting resistance of the roll paper P and the like. Further, when the upper cutting blade 3a returns to the original initial position due to such an increase, the ON signal is output from the cam switch 13 at that time, the reverse rotation of the drive motor M is stopped, and the cutting blade 3a returns to the original initial position. It will be stopped. Therefore, it is not necessary for the user to manually return the cutting blade 3a.

When the roll paper P is caught as described above and paper jam occurs, it is necessary to eliminate the jam. Therefore, in the facsimile apparatus F, when the roll paper P is caught and the CPU receives a signal from the motor drive control unit 14 indicating that there is an abnormality, the warning LED on the operation panel (not shown) is turned on, or Each unit is controlled such that a predetermined character for instructing the user to clear the paper jam is displayed on the display unit including a liquid crystal display or the like. Steps 100 to 115 of the flowchart of FIG. 5 show an example of a series of operation procedures of the cutting device S and the facsimile device F related to the cutting process of the roll paper P.

In the above embodiment, when the ON signal is not output from the cam switch 13 within a fixed time after the driving of the drive motor M is started, it is determined that the roll paper P is caught. However, the present invention is not limited to this. For example, when a sensor for detecting the descending state of the cutting blade 3a is used and when the descending time of the cutting blade 3a by this sensor becomes a certain time or more, this is determined as the roll paper P being caught and driven. The motor M may be reversed. Further, the present invention may be configured such that the reverse operation of the drive motor M is executed by a switch operation of the user. For example, when the roll paper P is caught, the fact is displayed on the display unit of the facsimile device F,
If the user who confirms this display operates the stop key on the operation panel or another appropriate key, the drive motor M may be configured to rotate in the reverse direction. In addition, the roll paper cutting device according to the present invention is not limited to being used by being incorporated in a facsimile device, and its use is not limited. Needless to say, the specific operation mechanism of the cutting blade is not limited to the structure of the above-described embodiment.

[0016]

As can be understood from the above description, according to the roll paper cutting device of the present invention, the roll paper is caught between the pair of cutting blades and the cutting blades are kept stopped. Even if such a situation occurs, the user does not have to take the trouble of manually grasping the cutting blade and returning it to its original position manually, and the cutting blade can be easily and quickly rotated by the reverse operation of the drive motor. As a result, the special effect that the user who does not know what to do when the jammed roll paper occurs and does not bother to call the service person is obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts showing an example in which a roll paper cutting device according to the present invention is incorporated into a facsimile device for use.

FIG. 2 is a perspective view showing an example of a roll paper cutting device according to the present invention.

FIG. 3 is a sectional view taken along line XX of FIG.

FIG. 4 is a cross-sectional view of essential parts showing a state in which roll paper is caught between a pair of cutting blades.

FIG. 5 is a flowchart showing an example of a series of operation procedures related to a roll paper cutting process.

FIG. 6 is a sectional view showing an example of a conventional roll paper cutting device.

FIG. 7 is an explanatory view showing a state in which roll paper is caught in a conventional roll paper cutting device.

[Explanation of symbols]

 3a Upper cutting blade 3b Lower cutting blade 4a Upper support 4b Lower support 5 Frame 6 Arm 7 Cam groove 9 Cam pin 10 Gear 12 Cam 13 Cam switch 14 Motor drive controller 40, 40a Shaft 43, 43a Shaft P Roll paper M Drive motor S Roll paper cutting device F Facsimile device

Claims (1)

[Claims] 1. A roll paper cutting device configured such that a set of cutting blades are brought into contact with and separated from each other by a rotational force of a drive motor, and the roll paper is cut by the meshing of the cutting blades. When the roll paper is caught between the two cutting blades, a means for reversing the drive motor is provided so as to separate the two cutting blades that are close to each other in an operation direction opposite to that when the roll paper is cut. A cutting device for roll paper, which is characterized in that