JPH04118262A - Continuous paper cutting device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] This invention relates to a continuous paper cutting device that starts the return movement of the movable blade of the cutter unit after starting the retreat of the unprinted printing paper when the cutter unit finishes cutting the printing paper. , An object of the present invention is to provide a continuous paper cutting device that can prevent the movable blade of a cutter unit from rubbing against the end surface of unprinted printing paper, thereby preventing damage to the printing paper and generation of paper dust. A device that transports a roll-shaped continuous paper supplied from a paper supply unit by a transport means and cuts it into a predetermined size with a cutter unit, the cutter unit includes a cutting blade and a cutting end detection unit, and the cutting blade includes: It has a movable blade that is moved by a moving means, and cuts the transported continuous paper by moving the movable blade by the moving means, and the cutting end detection means includes:
It detects that the cutting of the continuous paper by the movable blade has been completed, and based on the detection output of the cutting end detection means, the transport means starts to move the leading edge of the continuous paper back to a predetermined position by moving in the reverse direction. Afterwards, the movable blade is controlled so that the moving means starts moving the movable blade back to its original position.

[Industrial application field]

The present invention relates to a printer such as a thermal printer used in a facsimile (hereinafter referred to as FAX) device, etc., and in particular, when a cutter unit finishes cutting printed paper, the cutter unit The present invention relates to a continuous paper cutting device in which the return movement of the movable blade of the section can be started.

2. Description of the Related Art In recent years, printers such as thermal printers that can produce relatively high quality printing have been widely used in FAX machines and the like, and rolled paper or rolled thermal paper has been widely used as printing media.

When printing for one page of such roll paper is completed, it is cut into a predetermined size by a movable blade in the cutter section, and the movable blade returns to its original position, cutting the tip of the unprinted paper. is moved back to a predetermined position and printing of the next page begins. In this case, when the movable blade of the cutter unit returns to its original position after cutting, it rubs against the leading edge of the unprinted printing paper, damaging the printing paper and generating paper dust. How to prevent this. is desired.

[Prior Art] FIG. 4 is an internal side view of a thermal printer. As shown in the figure, a roll of thermal paper (hereinafter referred to as roll paper) 3a is fed from a paper supply section 4a to a line-type thermal head 1 and a platen roller. 2a, and springs 5a, 5
It is pressed against the platen roller 2a with a predetermined pressure by the thermal head 1, which is biased by the thermal head 1b. Platen roller 2
A is connected to the motor.

The thermal head l includes resistive heating elements (not shown) arranged in a line across the width of the roll paper 3a.
When a pulse current is selectively sent to the resistive heating element based on the print data, the corresponding resistive heating element generates heat, and the roll paper 3a is colored and printed. The thermal head 1 is retracted upward from the pressure contact position with the platen roller 2a except when printing.

A cutter section 6a that cuts the printed roll paper 3a into a predetermined size is provided downstream of the thermal head 1 and the platen roller 2a.

Thermal head 1. The cutter section 6a and the motor Ml are connected to a control section 20, and the control section 20 transfers the roll paper 3a.

Controls printing and cutting. In addition, 7 is a curl removal iron for the roll paper 3a + 8a + 8b is a paper guide, 9 is a feed port 1
0 indicates a stacker.

With such a configuration and function, the roll paper 3a printed by the thermal head 1 is sent in the direction of arrow A by driving the platen roller 2a. When printing of one page is completed, the roll paper 3a is fed to the cutter section 6a up to the rear end of the printed page and cut into a predetermined size.
It is delivered from the delivery port 9 and accumulated in the stacker 10.

Thereafter, when printing is to be continued, the platen roller 2a is immediately rotated in the reverse direction, so that the leading edge of the unprinted roll paper 3a is fed a predetermined distance in the direction of arrow B.

When the roll paper 3a is back-fed to a predetermined position,
Printing of the next page begins. After the last page has been printed and the roll paper 3a is cut, the roll paper 3a
The tip of the paper is placed in the position of the force/7 tap portion 6a, and when the next printing is performed, it is reversed and printing is started. This is because if printing is stopped for a long time with the leading edge of the roll paper 3a at the print start position, the roll paper 3a may stick to the platen roller 2a, and when printing starts again, the roll paper 3a may This is to prevent jams from occurring due to not being conveyed.

To explain the cutter section in detail, first, the conventional example (1)
is shown in FIG. 5, and as shown in the figure, the cutter part 6a
is a cutting blade 60a consisting of a fixed blade 61 and a movable blade 62a.
and a sensor S1 that detects the home position of the movable blade 62a. The movable blade 62a has one end connected to the rotation shaft 6.
3, and a movable blade 6 across the transport path of the roll paper 3a.
The other end of the fixed blade 2a and the end of the fixed blade 61 face each other so as to be able to shear the roll paper 3a. Rotating shaft 63 is connected to motor M2. Motor M2 and sensor S1 are connected to the control section 20.

Therefore, the movable blade 62a is detected by the sensor S1 and is at the home position, and as a result of the rotation of the motor M2 in response to the cutting command, the movable blade 62a rotates together with the fixed blade 61 to rotate the roll paper 3a as shown by the two-dot chain line in the figure. cut. The motor tag rotates by a predetermined number of revolutions and once the cutting is completed, it stops, and then rotates in the opposite direction until it is detected by the sensor S1 and returns to the home position. On the other hand, the unprinted roll paper 3a is pack-fed based on the detection signal of the sensor S1.

Further, as a different example, a conventional example (2) is shown in FIG. 6, and as shown in the figure, the cutter part 6a' has a fixed blade 61a,
and a movable blade 62b, a cutting blade 60b and a movable blade 62b.
A sensor S2. detects the home position of S2. It is composed of a sensor S3 that detects the end of cutting, and the movable blade 62b moves back and forth in a direction perpendicular to the traveling direction of the roll paper 3a, and cuts the roll paper 3a on the forward path of the movable blade 62a.

[Problems to be Solved by the Invention] According to the above conventional method, ■ In the method of conventional example (1), immediately after the roll paper is cut, when the movable blade rotates in the opposite direction and returns to the home position, , a problem occurs in which the leading edge of the unprinted roll paper is flipped up and the roll paper is damaged.

■In the conventional method (2), immediately after the roll paper is cut, when the movable blade moves in the opposite direction and returns to the home position, it rubs against the unprinted end of the roll paper, producing a large amount of paper dust. generate.

There is a problem.

SUMMARY OF THE INVENTION An object of the present invention is to provide a printer that can prevent the movable blade of a cutter unit from rubbing against the edge of unprinted printing paper, thereby preventing damage to the printing paper and generation of paper dust. .

[Means to solve the problem]

FIG. 1 is a diagram showing the principle configuration of the present invention.

In the figure, 2 is a transporting means, 4 is a paper supply section, 64 is a moving means, 6 is a cutter section equipped with a cutting blade 60 and a cutting end detection means 66, and 60 is provided in the cutter section 6 and is moved by the moving means 64. A cutting blade 66 is provided in the cutter section 6 and has a movable blade 62 that cuts the transported continuous paper 3 by moving the movable blade 62 by a moving means 64. This is a cutting completion detection means for detecting that the cutting is completed.

Therefore, based on the detection output of the cutting end detection means 66, after the transport means 2 starts to move the leading edge of the continuous paper 3 back to a predetermined position by moving in the reverse direction, the moving means 64 returns the movable blade 62 to its original position. The control is configured to initiate a return movement.

[Effect]

The continuous paper 3 supplied from the paper supply section 4 and transported by the transport means 2 is transferred to the movable blade 6 by the transport means 64.
2 is moved to cut, and when the cutting is completed, the cutting completion detecting means 6
6 is detected, based on the detection output, the transport means 2 starts transporting the leading end of the continuous paper 3 to a predetermined position by transporting it in the reverse direction.

After the transfer is started, the moving means 64 starts moving the movable blade 62 back to its original position.

When the movable blade 62 that has finished cutting in this way returns to its original position, it flips up the leading edge of the continuous paper 3 and cuts the continuous paper 3.
This can prevent the movable blade 62 from rubbing against the continuous paper 3 and generating paper dust.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 2 and 3. The same reference numerals indicate the same objects throughout the figures.

The platen roller 2a and sensor S4 in FIG. 2 correspond to the transfer means 2 and cutting end detection means 66 in FIG. 1, respectively.

FIG. 2 shows an embodiment in which the present invention is applied to the thermal printer described in the conventional example.
A sensor S4 is provided below the movable blade 62a of b to detect when the movable blade 62a finishes cutting the roll paper 3a.

Thermal head 1. Motor MLM2 and sensor S2.
S4 is connected to the control section 20a.

The control unit 20a performs almost the same printing drive control as the control unit 20 described in the conventional example, but differs in the following points.

That is, based on the detection signal of the completion of cutting of the roll paper 3a from the sensor S4, the motor M1 is rotated in the opposite direction to retreat the leading end of the unprinted roll paper 3a to a predetermined position, and the backward movement is started. Afterwards, the motor M2 is rotated in the reverse direction to return the movable blade 62a of the cutter portion 6b to the home position.

Since it has such a structure and function, the operation will be explained next with reference to the operation process diagram of FIG.

(1) First, as shown in FIG. 3(a), the printed roll paper 3a is conveyed to a position where it is cut by the cutter section 6b.

At this time, the movable blade 62a is at the home position.

(2) Then, as shown in FIG. 3(b), the motor M2 rotates based on a cutting command from the control section 20a, and the movable blade 62a rotates to cut the roll paper 3a.

■As shown in Figure 3 (C), when the cutting is completed, the movable blade 6
When 2a rotates to a predetermined position, it is detected by sensor S4, and a detection signal is sent to control section 20a.

3. Then, as shown in FIG. 3(d), the motor M1 rotates in the reverse direction in response to a hackfeed command from the control unit 20a, and backfeeding of the unprinted roll paper 3a starts by simultaneously feeding the platen 2a in the opposite direction. be done.

■When backfeeding of the roll paper 3a is started, the control unit 20a issues a return command for the movable blade 62a, and the motor M
2 rotates in the opposite direction, and the movable blade 62a starts returning as shown in FIG. 3(e).

■As shown in FIG. 3(f), when the movable blade 62a returns to the home position, the sensor S1 detects and the control unit 20
The rotation of the motor tag is stopped based on the detection signal sent to a.

■When the tip of the hack-fed roll paper 3a reaches a predetermined position, the motor Ml stops rotating and the platen roller 2
The feeding of a is stopped, and printing of the next page is started.

In this way, by detecting the end of cutting of the roll paper 3a by the movable blade 62a and starting the backfeed of the unprinted roll paper 3a, the return movement of the movable blade 62a to the home position is started. When the blade 62a returns, it is possible to prevent the tip of the unprinted roll paper 3a from being flipped up and damaging the tip of the roll paper 3a.

In the above example, a movable blade that rotates is explained, but a movable blade that moves up and down may be used, and the same effect can be obtained. The present invention can be similarly applied to the case of a movable blade that reciprocates in the right angle direction, and in this case, it is possible to prevent the movable blade from rubbing against the roll paper 3a and generating paper dust during the return movement of the movable blade.

Further, in the above example, a case has been described in which a platen roller is used to transport the roll paper 3a, but the invention can be similarly applied to a case where the roll paper 3a is transported by other members 1 such as a feed roller. Further, although the case where thermal paper is used has been described, the present invention can also be applied to roll paper of a thermal transfer type.

Furthermore, the present invention can also be applied to a printer that does not backfeed roll paper after cutting it after printing, or a paper cutting device other than a printer.

(Effects of the Invention) As explained above, according to the present invention, when the movable blade of the cutting blade of the cutter unit finishes cutting the continuous paper, the continuous After starting the movement to move the paper a predetermined distance in the opposite direction, the movement of the movable blade to return to the original position is started, so that when the movable blade finishes cutting and returns to the original position, the movement is continuous. This has the effect of preventing the front end of the paper from being flipped up and damaging the continuous paper, and the movable blade from rubbing against the continuous paper and generating paper dust.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the principle of the present invention; Fig. 2 is a block diagram showing an embodiment of the invention; Fig. 3 is an operational process diagram of the embodiment; Fig. 4 is an internal side view of a conventional thermal printer. , FIG. 5 is a side view showing the conventional example (1), and FIG. 6 is a plan view showing the conventional example (2). In the figure, 1 is a thermal head, 2 is a transport means, 2a is a platen roller, 3 is continuous paper, 3a is roll paper,
20.20a is a control part, 6.6a, 6a' are cutter parts, 60.60a, 60b are cutting blades, 6L61a is a fixed blade, 62, 62a, 62b are movable blades, 64
indicates a moving means, and MLM2 indicates a motor. Nt
b7] 12 Figure (αn (d) (shi) (e) (C) (f) lol digit iku j1/) operation process diagram''7 Roller 6a, η Ivy f7 Curl removing rod 5n, 517 S7° Lint star...l I'm here g) Thermal printer to distinguish/) Inner contour surface diagram
doo old

Claims (1)

[Claims] Roll-shaped continuous paper (
3) is transferred by the transfer means (2), and the cutter section (6)
A device for cutting to a predetermined size with a cutter section (
6) includes a cutting blade (60) and a cutting end detection means (66);
The cutting blade (60) has a movable blade (62) that is moved by a moving means (64), and the cutting blade (60) has a movable blade (62) that is moved by a moving means (64), and the cutting blade (60)
) is cut by moving the movable blade (62) by the moving means (64), and the cutting completion detecting means (66) cuts the continuous paper (3) by the movable blade (62). Based on the detection output of the cutting end detection means (66), the leading end of the continuous paper (3) is retracted to a predetermined position by the reverse direction transport of the transport means (2). A continuous paper cutting device characterized in that the moving means (64) starts moving the movable blade (62) back to its original position after starting the movement of the movable blade (62).