JP2724480B2 - Continuous paper cutting device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device for cutting a continuous sheet into unit sheets, and more particularly, to a pair of in-planes which are relatively opposed to each other at predetermined intervals in a vertical direction. A feed roller, a pair of high-speed rollers that rotate at a higher speed than the in-feed roller, which are also disposed so as to be relatively close to and separated from each other at predetermined intervals vertically, and a blade disposed between each of the pair of rollers. And a so-called fixed-type continuous paper cutting device.

2. Description of the Related Art Conventionally, in this type of fixed-type continuous paper cutting device, the blade is fixedly provided, and the operation of contacting / separating a pair of upper and lower infeed rollers and a high-speed roller is adjusted to a continuous paper cutting size. The continuous paper is cut by controlling each of them using a solenoid or a cam accordingly.

Therefore, in the related art, the control of the contact / separation operation between the in-feed roller and the high-speed roller, which is performed according to the cutting size, must be performed in synchronization with each other, which is complicated. There was a disadvantage.

SUMMARY OF THE INVENTION An object of the present invention is to provide a fixed-type continuous paper cutting device that solves these disadvantages.

Means for Solving the Problems Rotationally displacing with respect to a continuous paper transport path between a pair of upper and lower high-speed rollers which are arranged so as to be able to freely contact and separate as well as a pair of upper and lower infeed rollers which are arranged so as to be able to freely contact and separate A pair of in-feed rollers and a pair of high-speed rollers are moved in the contact direction when the rotating blades protrude into the paper transport path, thereby clamping the continuous paper. A moving mechanism for moving a pair of the in-feed roller and the pair of high-speed rollers in a contact direction by displacing the cam with the rotation of the rotary blade; The rotation of the rotary blade is controlled based on the cutting size of the continuous paper so that the blade of the rotary blade contacts the portion And a cutting control device.

The clamping operation by the pair of in-feed rollers and the pair of high-speed rollers is performed simultaneously by the same moving mechanism, and this operation is performed by the cutting control device in synchronization with the rotation blade protruding into the continuous paper transport path. Therefore, an accurate cutting operation is performed.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Here, FIG. 1 is a schematic explanatory view of a sheet processing apparatus including a cutting device which is partially omitted, FIG. 2 is a perspective view where a part of the cutting device is omitted, and FIG. 3 is a moving mechanism. FIG. 4 is a side view showing a certain cam mechanism, FIG. 4 is a block diagram of a cutting control device, FIG. 5 is a timing chart of a cutting operation, and FIG.

As shown in FIG. 1, a continuous sheet 1 to be cut into unit sheets 1a is folded in a zigzag shape at a folding / cutting perforation 2 which is a cutting portion thereof, is placed at a predetermined position, and is pulled out upward. And marginal portions 3 provided on both sides in the width direction.
A large number of transfer holes (not shown) provided at equal intervals (only one is shown) are engaged with tractor pins of the tractor 4, and the tractor 4 is rotationally driven by the main motor 41 (see FIG. 4). Are transported to the right in FIG. Then, the continuous paper 1 is separated by the slitter 5 disposed near the end of the tractor 4 in the transfer direction.
The marginal portion 3 is cut off, transported in the same direction, and supplied to the cutting device 6.

Next, the cutting device 6 will be described with reference to FIGS.

As shown in FIG. 1, following the tractor 4, a pair of upper and lower infeed rollers 7a and 7b which are opposed to each other at an interval of about 1 mm, and
a, 7b at a predetermined distance in the transfer direction, 1m
A pair of upper and lower high-speed rollers 8a and 8b are provided facing each other at an interval of about m. As shown in FIG. 2, teeth 9a, 9b and teeth 10a, 10b that can mesh with each other are provided around one end of each of the in-feed rollers 7a, 7b and the high-speed rollers 8a, 8b. Have been. The teeth 9b mesh with a gear 12 provided on one end of the shaft 11. On the other end of the shaft 11, a gear 13 having the same number of teeth as the gear 12 is provided, and on one end of a shaft 14 extending parallel to the shaft 11, the number of teeth is smaller than that of the gear 13. A gear 15 is provided. Further, between each of the gears 13 and 15 and a gear (not shown) connected to the output shaft of the main motor 41 (see FIG. 4), there is an uneven surface which engages with each of the gears 13 and 15. An endless belt 16 is stretched. On the other end shaft of the shaft 14, a gear 17 having the same number of teeth as the gear 15 meshing with the tooth portion 10b is provided. Although not shown in FIG. 2, as shown in FIG.
An endless transfer belt 19 is stretched between the roller 8b and the roller 18. As described above, since the number of teeth of each of the gears 13, 15 and 12, 17 is different, the high-speed roller 8b rotates at a higher speed than the in-feed roller 7b, and both rotate clockwise in FIG. It is configured to rotate.

As shown in FIGS. 1 and 2, a gear 20 having the same number of teeth as the gear 15 provided at one end of the shaft 14 and a shaft 22 to which a rotating blade 21 is fixed are provided via a clutch 23 at one end of a shaft 22. An endless belt 24 is stretched between gears (not shown). Therefore, when the clutch 23 is engaged, the shaft 22 rotates at the same speed as the shaft 14, and the rotary blade 21 also rotates counterclockwise in FIG. Due to this rotation, the rotating blade 21 protrudes with respect to the transport path of the continuous paper 1 when the blade edge faces downward. Although the position of the cutting edge in the initial state of the rotary blade 21 is not specified, the position facing directly upward is set as the original position, and the cutting timing of the continuous paper 1 is determined based on this position. Although not shown in FIG. 2, in addition to the clutch 23, a brake for stopping the rotation of the shaft 22 is provided.
38 (see FIG. 4).

As shown in FIGS. 2 and 3, a pair of disk-shaped cams 25a and 25b are eccentrically fixed to the shaft 22, and these cams 25a and 25b are fixed to each other.
a and 25b move the pair of in-feed rollers 7a and 7b and the pair of high-speed rollers 8a and 8b in the contact direction when the rotating blade 21 protrudes into the transfer path of the continuous paper 1 so that the number of teeth 9a is increased. , 9b and 10a, 10b form a part of a moving mechanism for holding the continuous paper 1. Next, a description will be given of the moving mechanism, but only the cam 25a will be described since the configuration of each of the cams 25a and 25b is the same.

The state of the cam 25a corresponds to the state of the rotary blade 21 and is not clear in the drawing, but is fixed to the shaft 22 so that the minimum diameter portion and the cutting edge correspond to each other. In the standby state, the cam 25a swings around the shafts 26 and 27 in a state where the small diameter portion is not located at the lower portion, for example, as shown in FIG. Abut on idler rollers 28a, 29a provided at each end of the support arms 28, 29 supported by the support arms 28, 29.
The idler rollers 28b, 29b provided at the other end of 29 have an infeed roller 7a and a high-speed roller 8a,
Support the disk-shaped receiving portions 30 and 31 provided at one end. As a result, in the standby state of the cam 25a, the pair of in-feed rollers 7a, .7b and the high-speed rollers 8a, 8b are both separated vertically.

With the rotation of the shaft 22, each of the cams 25a and 25b is rotationally displaced in the counterclockwise direction in FIG. 3 together with the rotary blade 21. When the small-diameter portion of each of the cams 25a and 25b is located below, the support arm 28 Swings counterclockwise in the figure with the shaft 26 as a fulcrum, the support arm 29 swings clockwise in the figure with the shaft 27 as a fulcrum, and the rollers 7a and 8a are lowered. As a result, the teeth 9a, 9b and 10a, 10b of each of the pair of in-feed rollers 7a, 7b and the high-speed rollers 8a, 8b mesh with each other, so that the continuous paper 1 is pinched and rotated in a predetermined direction. It becomes possible.

As shown in FIG. 1, following the cutting device 6, a pair of upper and lower transfer rollers 32a for transferring the cut unit paper 1a,
The unit paper 1a transported by the transport rollers 32a, 32b is provided so as to be sequentially stacked on the stacker 33.

Next, the cut size of the continuous paper 1, that is, the unit paper 1a
FIG. 1 and FIG. 4 will be used to describe a disconnection control device that controls each operation including engagement and disengagement of the clutch 23 that sets the rotation timing of the rotary blade 21 in accordance with the length of the rotary blade 21.

The control operation is entirely performed by the CPU 35 shown in FIG. 4, and includes the high-speed rollers 8a and 8b and the rotating blade 21.
At the position vertically sandwiching the transfer path of the continuous paper 1 between
A paper leading edge detection sensor 34 composed of a pair of optical sensors is arranged. When the paper leading edge detection sensor 34 detects the leading edge of the continuous paper 1, a detection signal is input to the CPU 35. Further, the CPU 35 includes a tractor rotation amount detection signal for detecting the paper feed amount from the tractor encoder 36 and a blade rotation amount detection signal for detecting the rotation amount of the rotary blade 21 from the blade encoder 37.
Each is configured to be input. In addition,
The CPU 35 is connected to a speed volume 40 for setting the transfer speed of the continuous paper 1 via a power circuit 39, and is configured to receive a transfer speed setting signal. And
Based on these input signals, control signals are output from the CPU 35 to the clutch 23, the brake 38, and the main motor 41 via the power circuit 39, and these drive controls are performed to control the rotation of the shaft 22. The operation of the rotary blade 21 and the cams 25a and 25b is controlled.

Subsequently, the sheet cutting operation of this embodiment will be described with reference to FIGS. 1, 5, and 6. FIG.

First, an operation of rotating the rotating blade from the initial position to a predetermined standby position will be described.

As shown in FIG. 1, the continuous paper 1 is pulled out, the transfer holes are engaged with the pins of the tractor 4, and the speed volume is adjusted.
When the paper feed speed is input by 40 and the power is turned on (step 101), the main motor 41 is driven to rotate the tractor 4, the infeed roller 7b, and the high-speed roller 8b in a predetermined direction. While the transfer is started, the clutch 23 is engaged (step 10).
2), the rotating blade 21 and the cams 25a and 25b also start rotating in a predetermined direction. Subsequently, the tractor encoder 36 detects the transport amount of the continuous paper 1 by the tractor 4, while the blade encoder 37 detects the rotation amount of the rotary blade 21. Based on the detection signal of the blade encoder 37, the CPU 35 determines whether or not the cutting edge of the rotary blade 21 has reached the vertex, that is, the original position (step 10).
3). And if it is determined that it has not reached, step 1
05, the CPU 35 also sets the speed correction brake counter in the CPU 35 to the tractor encoder.
Correction data based on the tractor rotation amount detection signal from 36 is set, and it is determined whether or not the countdown is performed and the counter value becomes zero. The correction data has a smaller value as the transfer speed is higher, so that the brake application timing is set earlier. If it is determined that the correction data corresponding to the transport speed of the continuous paper 1 is not set in the speed correction brake counter, the process proceeds to step 107 to determine whether the leading edge of the continuous paper 1 has been detected by the paper leading edge detection sensor 34. Is determined by the CPU 35. The leading edge of the continuous paper 1 is detected by the leading edge detection sensor 34.
If it is not detected by step 109, step 109
The clutch counter in the CPU 35 is set, the countdown is performed, and the counter value becomes zero,
The determination is made by the CPU 35. If it is determined that the clutch counter has not been set, the process proceeds to step 111,
The correction data is set in the speed correction clutch counter in the CPU 35, and the CPU 35 determines whether or not the count value is reduced and the counter value becomes zero.
Like the correction data of the speed correction brake counter, the correction data also has a smaller value as the transport speed of the continuous paper 1 is faster, and the timing for disengaging the clutch 23 is set earlier. Here, if it is determined that it is not zero, the process returns to step 103, and the above-described operation is repeated until the cutting edge of the rotating blade 21 reaches the vertex which is the original position.

In step 103, the cutting edge of the rotating blade 21 reaches the top,
If it is determined that it is at the original position, correction data corresponding to the transfer speed of the continuous paper 1 is set in the speed correction brake counter, and the countdown is started (step 10).
Four). Subsequently, the process proceeds to step 105, where it is determined whether the counter value of the set correction data has become zero or not. If the counter value has not become zero, the process proceeds to steps 103, 109, 111, and Return to If it is determined in step 103 that the rotary blade 21 has once returned to the original position, the process proceeds to step 105.

If it is determined in step 105 that the count value of the correction data of the speed correction brake counter is not zero, the process returns from step 107 to step 105 via steps 109, 111, and 103, and repeats this operation. On the other hand, if it is determined in step 105 that the count value of the correction data of the speed correction brake counter has become zero, the clutch 23 is disengaged and the brake 38 is applied (step 106). As a result, the rotating blade 21 is stopped at a position where its cutting edge has passed the vertex and is advanced by about 45 degrees with respect to the vertical state, and the cams 25a and 25b are also in a stationary state and are in a standby state.

Next, a description will be given of a cutting operation based on a sheet leading edge detection signal issued every predetermined time according to the sheet transfer speed based on the sheet cutting size.

The continuous paper 1 is continuously transported by the tractor 4,
Whether the leading edge is detected by the paper leading edge detection sensor 34,
It is determined whether or not it is not detected (step 107). If it is determined that the detection is not performed, the operation of returning from step 109 to step 107 through steps 111, 103, and 105 is repeated in the same manner as described above. On the other hand, the continuous paper 1 is separated from the infeed rollers 7a and 7b in the separated state and the rotating blade 2 in the standby state.
If it is determined that the leading edge of the continuous paper 1 has been detected in step 107 after passing through step 1, the clutch counter is set and the countdown is started (step 108).

Next, in step 109, it is determined whether or not the count value of the clutch counter has become zero. If the count value has not become zero, the process proceeds from step 111 to step 1 in the same manner as described above.
The operation of returning to step 109 via 03, 105 and 107 is repeated.
On the other hand, if it is determined in step 109 that the count value of the clutch counter has become zero, correction data corresponding to the transfer speed of the continuous paper 1 is set in the speed correction clutch counter, and countdown is started (step 110). ).

Then, the process proceeds to step 111 to determine whether or not the count value of the set correction data has become zero.If it is determined that the count value has not become zero, the process proceeds from step 103 to steps 105, 107, and 109 in the same manner as described above. The operation returning to step 111 is repeated. On the other hand, if it is determined in step 111 that the count value of the correction data of the speed correction clutch counter has become zero, the clutch 23 is engaged and the brake 38 is released (step 112). As a result, the rotating blade 21 and the cams 25a and 25b rotate again, and when the cutting edge of the rotating blade 21 faces downward according to the transfer of the continuous paper 1, the small-diameter portions of the cams 25a and 25b face downward. Each pair of in-feed rollers 7a and 7b and the high-speed rollers 8a and 8b sandwich the continuous paper 1. The continuous paper 1 is folded and cut by a perforated unit paper 2.
Cut to 1a.

By repeating the above operation, the continuous paper 1 is cut for each unit paper 1a, and each unit paper 1a is
It is sent to the stacker 33 by 32a and 32b, and is stacked here.

Note that the present invention is not limited to the above-described embodiment.For example, the rotation control of the rotary blade 21 and the cams 25a and 25b is performed by disconnecting the clutch 23 and using a pulse motor or a servomotor. You may. Furthermore, the rotation control of the rotary blade based on the cut size of the continuous paper determines the cut size based on the detection signal of the leading edge of the paper and the paper feed amount, or may determine the cut size based on only the paper feed amount.

Advantageous Effects As described above, according to the present invention, according to the present invention, the protruding operation of the rotating blade with respect to the continuous paper transport path, the infeed roller and the high speed by the moving mechanism having the cam provided on the rotating shaft of the rotating blade are provided. Since the pinching operation of the roller with respect to the continuous paper is performed in synchronization based on the cutting size of the continuous paper, there is an effect that the continuous paper can be accurately cut into unit paper at a predetermined position.

[Brief description of the drawings]

FIG. 1 shows a preferred embodiment of the present invention, FIG. 1 is a schematic explanatory view of a sheet processing apparatus including a cutting device partially omitted, and FIG. 2 is a perspective view with a part of the cutting device omitted. FIG. 3 is a side view showing a cam mechanism as a moving mechanism, FIG. 4 is a block diagram of a cutting control device, FIG. 5 is a timing chart of a cutting operation, and FIG. 6 is a flowchart similarly. 1 continuous paper, 2 perforations for folding and cutting, 4
Tractor, 6 Cutting device, 7a, 7b In-feed roller, 8a, 8b High-speed roller, 21 Rotating blade, 23 Clutch, 25a, 25b Cam, 28, 29 Support Arm, 30, 31 ... receiving part, 34 ... paper edge detection sensor, 35 ... CPU, 38 ... brake, 41 ... main motor

Claims (1)

(57) [Claims] A pair of in-feed rollers disposed so as to be relatively close to and separated from each other at a predetermined interval above and below; A pair of high-speed rollers that rotate at a higher speed than the in-feed roller, and a blade disposed between each of the pair of rollers. A cutting device that cuts continuous paper into unit paper with a blade, the rotating blade protruding by being rotationally displaced with respect to a continuous paper transfer path between the pair of in-feed rollers and the pair of high-speed rollers, A cam provided on a rotating shaft of the rotating blade, wherein when the rotating blade protrudes into a paper transport path, the cam of the cam accompanying the rotation of the rotating blade is provided. A moving mechanism for moving the pair of in-feed rollers and the pair of high-speed rollers in the contact direction depending on the position, and holding the continuous sheet, and a moving mechanism for the continuous sheet so that the cutting edge of the rotating blade comes into contact with a cutting portion of the continuous sheet. A cutting control device for controlling a rotation operation of the rotary blade based on a cutting size.