JPH04283100A - Cutting device for continuous sheet - Google Patents

Abstract

PURPOSE:To facilitate regulation of inclination of the roller axes of upper and lower rollers which first and second paired rollers comprise and to perform constantly excellent cutting of a continuous sheet by setting the upper and lower rollers in parallel to each other. CONSTITUTION:In a cutting device 10 for a continuous sheet, in each of two end supporting systems 23L and 23R for the one of upper and lower rollers 21A, 21B and 22A, 22B which first and second paired rollers 21 and 22 respectively comprise, support axles which respective support systems 23L and 23R comprise form eccentric axles 26 independently from each other.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous paper cutting device for cutting continuous paper such as continuous forms along separation lines to obtain unit papers such as unit forms.

0002

2. Description of the Related Art Conventionally, a method for cutting continuous paper has been proposed as described in Japanese Patent Laid-Open No. 60-77000. This continuous paper cutting method cuts (divides) a continuous form into unit forms along separation lines (perforations), and the first pair of rollers is placed at an upstream position along the continuous paper conveyance line. , the second pair of rollers is disposed at a downstream position along the continuous paper conveyance line, and the circumferential speed of the second pair of rollers is set higher than the circumferential speed of the first pair of rollers. A cutting blade as a cutting auxiliary member capable of engaging one side of the continuous paper is disposed between the second pair of rollers.

[0003] In each of the first and second roller pairs, the upper rollers are rotatably supported by an eccentric shaft, and the swinging of the eccentric shaft causes the upper rollers to move towards and away from the lower roller. . Cutting of continuous forms along the separation line is performed using the approaching movement. That is, when the separation line comes to a position in front of the cutting blade, the eccentric shaft is rotated about 90 degrees. As a result, the upper roller swings toward the lower roller, and the form is finally held between the upper and lower rollers.

By the way, as mentioned above, the second pair of rollers on the downstream side is faster than the first pair of rollers on the upstream side (for example, 1.
5 times). Therefore, when a form is held between the upper and lower rollers of each of the first and second pair of rollers as described above, tension is applied to the continuous form between the first pair of rollers and the second pair of rollers. Cutting along the separation line is performed by the cooperation of this tension and the cutting blade.

[0005]

[Problems to be Solved by the Invention] However, in the prior art, the eccentric shaft that supports the upper roller is a single piece that spans the entire length of the upper roller in the axial direction, and when the eccentric shaft rotates, the upper roller is always It will move in parallel.

Therefore, it is impossible to adjust the inclination of the roller shaft of the upper roller by rotating the eccentric shaft. Therefore, if the upper and lower roller axes are not parallel due to errors in processing accuracy, assembly accuracy, etc. of the component parts, uneven contact will occur between the upper roller and the lower roller in the roller axial direction. This uneven contact means that the paper cannot be held between the upper and lower rollers with uniform pressure in its width direction, and that it is not possible to cut the paper smoothly along the separation line.

The present invention makes it possible to easily adjust the inclination of the roller axes of the upper and lower rollers constituting the first and second pair of rollers, and by setting the upper and lower rollers parallel to each other, it is possible to always keep continuous paper in good condition. Intended for cutting.

[0008]

[Means for Solving the Problems] The present invention arranges a first pair of rollers at an upstream position along a continuous paper conveyance line, and a second pair of rollers at a downstream position along a continuous paper conveyance line. At the same time, the circumferential speed of the second pair of rollers is set higher than the circumferential speed of the first pair of rollers, and at least one of the upper and lower rollers constituting each of the first and second roller pairs is set to a higher speed than the other roller pair. By moving toward and away from the roller, the first
and a second pair of rollers sandwich the continuous paper to apply tension to the continuous paper, and cut the continuous paper along a separation line of the continuous paper between the first pair of rollers and the second pair of rollers. In a continuous paper cutting device, a support shaft constituting each support system is attached to each of the support systems at both ends of at least one of the upper and lower rollers constituting each pair of first and second rollers. , with mutually independent eccentric axes.

[0009]

[Operation] According to the present invention, in each of the support systems at both ends of at least one of the upper and lower rollers constituting each pair of first and second rollers, the support shafts of each support system are independent of each other. It is an eccentric shaft. Therefore, by rotating the eccentric shafts corresponding to each of the support systems at both ends of the roller independently of each other, the inclination of the roller axis of the roller can be adjusted.

0010

[Embodiment] Fig. 1 is a side view showing one embodiment of the present invention, Fig. 2
1 is a perspective view of a main part of FIG. 1, and FIG. 3 is a sectional view taken along line A-A in FIG.

As shown in FIG. 1, the cutting device 10 cuts (divides) a continuous form 11 into unit forms 12 along separation lines (perforations) 11A (not shown).

The cutting device 10 has a first pair of rollers 21 (upper roller 21A and lower roller 21B) disposed at an upstream position along the conveyance line of the continuous form 11, and a second pair of rollers 22 (
The upper roller 22A and the lower roller 22B) are arranged at downstream positions along the conveyance line of the continuous form 11.

The first and second pair of rollers 21 and 22 are constantly driven to rotate by a motor (not shown), including before and after cutting, so that the circumferential speed of the second pair of rollers 22 is lower than that of the first pair of rollers. The peripheral speed is set higher than the peripheral speed of No. 21.

The cutting device 10 includes upper rollers 21A and 22A of each of the first and second pair of rollers 21 and 22.
are moved closer to the lower rollers 21B and 22B as follows.

That is, the first and second pair of rollers 21 and 22
The upper rollers 21A and 22A that constitute the
23R (see Figure 2). Each support system 23
L and 23R can swing around a swing center axis 24 and have a swing lever 25 that supports the upper rollers 21A and 22A, and a drive lever 27 that is connected to the swing lever 25 via an eccentric shaft 26. It is configured as follows. And both end support system 2
The drive levers 27 of 3L and 23R are connected to the output part of a solenoid 29 via a connecting pin 28.

Incidentally, the eccentric shaft 26 provided in each of the support systems 23L and 23R is connected to the fixed portion 26 as shown in FIG.
A can be fixed to the drive lever 27 with a fixing screw 31, and the swing lever 25 is supported on the eccentric portion 26B. At this time, the eccentric shafts 26 (26L, 26R) (see FIG. 2) provided in each of the support systems 23L, 23R are independent from each other.

That is, in the cutting device 10, the controller 3
2 controls the solenoid 29 via the solenoid drive circuit 33 to swing the swing lever 25 appropriately. Then, in each of the first and second roller pairs 21, 22, the upper rollers 21A, 22A of the roller pairs 21, 22 are moved relative to the lower rollers 21B, 22B from a constant origin position at a constant swing start timing. By oscillating a certain oscillating angle range at a certain oscillating speed and moving each upper roller 21A, 22A closer to each lower roller 21B, 22B,
Between both rollers 21A and 21B, and between both rollers 22A and 2
The continuous form 11 is held between the 2B.

As shown in FIG. 1, the cutting device 10 has a cutting blade 34 that can engage one side of the continuous form 11 between the first pair of rollers 21 and the second pair of rollers 22. Incidentally, the cutting blade 34 is fixedly arranged so as to protrude downward from the transport level surface of the continuous form 11 formed by the lower rollers 21B and 22B of both the pair of rollers 21 and 22.

As shown in FIG. 2, the cutting device 10 has a pin tractor 35 equipped with a pin that engages the marginal punch of the continuous form 11 on the input side of the first pair of rollers 21, and A pinch roller 36 is arranged on the exit side of the pair of rollers 22. The pin tractor 35 and the pinch roller 36 are each driven by a motor (not shown), and the continuous form 11
is conveyed at a constant feed speed. The pin tractor 35 includes an encoder 37 and transfers position information of the separation line 11A of the continuous form 11 to the controller 32.

However, the controller 32 of the cutting device 10 detects the continuous form 1 from the detection output of the encoder 37 described above.
At the timing when the separation line 11A of the first pair reaches a specific position in front of the cutting blade 34, the solenoid 29 is controlled via the solenoid drive circuit 33, and the swing lever 25 starts swinging. The continuous form 11 is held between the upper and lower rollers 21A and 21B of the roller 21 and the upper and lower rollers 22A and 22B of the second pair of rollers 22. At this time, the second pair of rollers 22 on the downstream side is rotated at a higher speed than the first pair of rollers 21 on the upstream side, as described above. Therefore, when the continuous form 11 is sandwiched between the upper and lower rollers 21A and 21B of the first and second pair of rollers 21 and 22, and between 22A and 22B, the first pair of rollers 21 and the second pair of rollers Tension is applied to the continuous form 11 between the continuous forms 11 and 22. Then, due to this tension and the auxiliary action of the cutting blade 34, cutting is performed along the separation line 11A.

Next, the operation of the above embodiment will be explained.

Both end support systems 23L and 23 of the upper rollers 21A and 22A constituting the first and second pair of rollers 21 and 22
In each of the support systems 23L and 23R, the shafts connecting the swing lever 25 and the drive lever 27 are mutually independent eccentric shafts 26 (26L, 26R). Therefore, by rotating the eccentric shafts 26L, 26R corresponding to each support system 23L, 23R independently of each other, each support system 23L, 23
The support angles of the R swing levers 25 (25L, 25R) (see FIG. 2) are made different from each other, and the upper rollers 21A, 2
The tilt of the 2A roller shaft can be adjusted.

[0023] As a result, each of the first and second pair of rollers 21
, 22, the upper and lower rollers 21A, 21B and the upper and lower rollers 22A, 22B are set parallel to each other, so that the continuous form 11 can be held with uniform pressure in the width direction, and the separation line 1
Smooth cutting along 1A is possible.

[0024] Furthermore, in the above embodiment, continuous form 1
For each thickness change of 1, the first and second pair of rollers 21,
The origin positions of the upper rollers 21A and 22A that constitute 22 are
The setting can also be changed by adjusting the rotation of the eccentric shafts 26 (26L, 26R) described above. That is, when the continuous form 11 is changed from a thin one to a thick one, for example, by changing the origin positions of the upper rollers 21A and 22A to predetermined positions on the upper side, the swing lever 25 by the solenoid 29
The timing at which the continuous form 11 is held between the pair of rollers 21 and 22 can be easily adjusted without changing the swing start timing.

In carrying out the present invention, the eccentric shaft may not be adjusted manually but may be adjusted electrically using a motor or the like.

Furthermore, in carrying out the present invention, the drive source for the roller pair is not limited to a solenoid, but may be another actuator such as a motor.

[0027] Furthermore, in carrying out the present invention, the eccentric shaft is
As long as the support shaft constitutes a both-end support system, it is not limited to the lever connecting shaft as in the above embodiment, but may be employed as both end shafts of each roller or the swinging center shaft of a swinging lever that supports each roller. It may be something.

[0028]

As described above, according to the present invention, the inclination of the roller axes of the upper and lower rollers constituting each of the first and second pair of rollers can be easily adjusted, and the upper and lower rollers can be set parallel to each other. Continuous paper can always be cut well with this machine.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of the present invention.

FIG. 2 is a perspective view of a main part of FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A in FIG. 1.

[Explanation of symbols]

10 Cutting device 11 Continuous report 21 First pair of rollers 21A Upper roller 21B Lower roller 22 Second pair of rollers 22A Upper roller 22B Lower roller 23L, 23R　Both end support system 26 Eccentric shaft

Claims (1)

[Claims] Claim 1: A first pair of rollers is disposed at an upstream position along the continuous paper conveyance line, a second pair of rollers is disposed at a downstream position along the continuous paper conveyance line, and the second pair of rollers is disposed at a downstream position along the continuous paper conveyance line.
The circumferential speed of the pair of rollers is set higher than the circumferential speed of the first pair of rollers, and at least one of the upper and lower rollers constituting each of the first and second roller pairs is set relative to the other roller. By moving toward and away from each other, the continuous paper is held between the first and second pair of rollers, tension is applied to the continuous paper, and the continuous paper is moved between the first and second pair of rollers. In a continuous paper cutting device that cuts continuous paper along a separation line,
In each of the support systems at both ends of at least one of the upper and lower rollers constituting each of the first and second pair of rollers, the support shafts constituting each support system are eccentric shafts that are independent of each other. A continuous paper cutting device characterized by: