JP2724481B2 - Continuous paper cutting device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting apparatus for cutting continuous paper into unit paper, and more particularly, to a transfer mechanism for transferring continuous paper, and a vertically moving and vertically moving mechanism. A pair of in-feed rollers which are relatively opposed to each other at a predetermined interval, and rotate at a higher speed than the in-feed rollers which are also opposed to each other at a predetermined interval vertically. The present invention relates to a so-called fixed-type continuous paper cutting device including a pair of high-speed rollers and a blade disposed between the pair of rollers.

2. Description of the Related Art Conventionally, in a fixed-type continuous paper cutting device of this type, a pair of upper and lower infeed rollers and a high-speed roller are brought into contact with and separated from each other when the cutting size of the continuous paper and the transport amount match. The continuous paper was cut by controlling each using a solenoid or a cam.

Therefore, in the related art, the control of the contact / separation operation between the in-feed roller and the high-speed roller performed according to the cutting size of the continuous paper must be performed separately in synchronization. If the positioning is not performed correctly when setting the continuous paper on the tractor, the cutting position will be misaligned with the blade position, making it impossible to perform accurate cutting with the blade. However, there is a disadvantage that work efficiency is inferior.

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 Between a pair of upper and lower freely movable in-feed rollers, which are located on the rear side of a transfer mechanism such as a tractor and are opposed to each other, and between a pair of upper and lower freely movable high-speed rollers. While a blade is provided, a cam is provided on a rotating shaft of a rotating blade to move the pair of infeed rollers and the pair of high-speed rollers in a contact direction to sandwich continuous paper, and to rotate the rotating blade. A movement mechanism that moves the pair of in-feed rollers and the pair of high-speed rollers in a contact direction by the displacement of the cam associated with the cam, and that a continuous sheet provided at the subsequent stage of the transfer mechanism has been transferred. A paper detection mechanism, for example, an optical sensor to be detected, and a previous detection signal based on a detection signal of the paper detection mechanism and a cutting size signal input in advance. And a cutting control device for controlling the operation of holding the continuous paper by the moving mechanism.

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 based on the detection signal of the paper detection mechanism detecting the presence of the paper and the cutting size signal input in advance. , It is possible to cut accurately at a predetermined position of the continuous paper.

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, the continuous paper 1 to be cut into unit paper 1a is folded in a zigzag shape at the folding / cutting perforation 2, placed at a predetermined position, pulled out upward, and A large number of transfer holes (not shown) are provided at equal intervals in the marginal portions 3 (only one is shown) provided on both sides in the direction.
The tractor 4 is engaged with a tractor pin of a tractor 4 serving as a transfer mechanism, and the tractor 4 is rotated by a main motor 41 (see FIG. 4) to be transferred rightward in FIG. Then, the continuous paper 1 is cut off the marginal portion 3 by a slitter 5 disposed near the end of the tractor 4 in the transfer direction, is further transferred in the same direction, and is supplied to the cutting device 6.

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

As shown in FIG. 1, a pair of upper and lower infeed rollers 7a and 7b are disposed on the subsequent stage following the tractor 4 so as to be able to freely contact and separate with an interval of about 1 mm. 7b and a pair of upper and lower high-speed rollers 8a and 8b which are arranged opposite to each other at a predetermined interval in the transport direction and are also spaced apart by about 1 mm. As shown in FIG. 2, the in-feed rollers 7a, 7
The teeth 9a, 9b and the teeth 10a, 10b that can mesh with each other are provided on the peripheral surfaces of the b and the high-speed rollers 8a, 8b on one side end. The teeth 9b mesh with a gear 12 provided on one end of the shaft 11. On the other end side of the shaft 11,
A gear 13 having the same number of teeth as the gear 12 is provided, and a gear 15 having fewer teeth than the gear 13 is provided at one end of a shaft 14 extending in parallel with the shaft 11. Further, between the gears 13 and 15 and gears (not shown) connected to the output shaft of the main motor 41 (see FIG. 4), the gears 13 and 1 are provided.
An endless belt 16 having a concave-convex surface engaging with 5 is stretched. On the other end side 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. Second
Although not shown in the figure, as shown in FIG. 1, the high-speed roller 8b and the roller 18 are provided with an endless transfer belt 19.
Has been passed over. As described above, each gear 13, 15 and 1
Since the numbers of teeth 2 and 17 are different, the high speed roller 8b rotates at a higher speed than the infeed roller 7b, and both are configured to rotate clockwise in FIG.

As shown in FIG. 2, a gear 20 having the same number of teeth as a gear 15 provided at one end of a shaft 14 and a gear provided via a clutch 23 at one end of a shaft 22 to which a rotating blade 21 is fixed (not shown). Z)
An endless belt 24 is stretched between them. 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. By this rotation, as shown in FIG. 1, the rotating blade 21 projects out of the transfer 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 38 (see FIG. 4) for stopping the rotation of the shaft 22 is provided.

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 tooth portions 9a of each other move. , 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. However, since the configuration of each of the cams 25a and 25b is the same, only the cam 25a will be described.

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. And
The cam 25a is swingably supported by the shafts 26 and 27 in a state where the small diameter portion is not located at the lower portion in the standby state, for example, as shown in FIG. The supporting arms 28, 29 provided at one ends of the supporting arms 28, 29, respectively.
The idler rollers 28b and 29b provided at the other end of the upper and lower rollers 8a and 29b respectively have an in-feed roller 7a and a high-speed roller
Supports disk-shaped receiving portions 30, 31 provided at one end of 8a. 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 in a vertically separated state.

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 The pivot arm 26 pivots in the counterclockwise direction in the figure, and the support arm 29 pivots about the shaft 27 in the clockwise direction in the figure, whereby 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, and pinch the continuous paper 1 and rotate 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.

As shown in FIG. 1, between the high-speed rollers 8a and 8b and the rotating blade 21 at the subsequent stage of the tractor 4, a transfer path of the continuous paper 1 near the high-speed rollers 8a and 8b is provided. A paper leading end detection sensor 34 composed of a pair of optical sensors serving as a paper detection mechanism is disposed at a position sandwiched between the upper and lower sides. The paper leading edge detection sensor 34 is configured to generate a detection signal when detecting the leading edge of the conveyed continuous paper 1.

Next, a cutting control device that controls each operation including the operation of the moving mechanism based on the detection signal of the sheet leading edge detection sensor 34 will be described with reference to FIGS. 1 and 4. FIG.

The control operation is entirely performed by the CPU 35 shown in FIG. 4. When the leading edge detection sensor 34 detects the leading edge of the continuous paper 1, a detection signal is input to the CPU 35. In addition, the CPU 35 includes a tractor rotation amount detection signal for detecting the paper feed amount from the tractor encoder 36, and a rotation blade 21 from the blade encoder 37.
A blade rotation amount detection signal for detecting the rotation amount of the blade,
The cutting size signal corresponding to the size of the unit paper 1a for cutting the continuous paper 1 into the unit papers 1a is input from the cutting size signal input unit 42, respectively. Further, a speed volume 40 for setting the transfer speed of the continuous paper 1 is connected to the CPU 35 via a power circuit 39, so that a transfer speed setting signal is input. Then, based on these input signals, the CP
From U35 via power circuit 39, clutch 23, brake 3
A control signal is output to the motor 8 and the main motor 41, and the drive control of these outputs controls the rotation of the shaft 22, thereby controlling the movement of the moving mechanism including the cams 25a and 25b and the operation of the rotary blade 21. Because

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 21 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 cutting size is input from the cutting size signal input unit 42 and the power is turned on (step 101), the main motor 41 is driven to drive the tractor 4, the infeed roller 7b, the high speed The roller 8b is driven to rotate in a predetermined direction, and the transfer of the continuous paper 1 is started, while 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 according 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. If it is determined that the value is not zero, the process returns to step 103, and the above-described operation is repeated until the cutting edge of the rotary blade 21 reaches the vertex that 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.

Subsequently, the cutting control operation based on the sheet leading edge detection signal and the cutting size signal input in advance will be described.

The continuous paper 1 continues to be transported by the tractor 4, but it is determined whether or not the leading edge thereof is detected by the paper leading edge detection sensor 34 (step 107). Step 10 as well
The operation of returning from Step 9 to Step 107 through Steps 111, 103 and 105 is repeated. On the other hand, the continuous paper 1 passes through the in-feed rollers 7a and 7b in the separated state and the rotating blade 21 in the standby state, and is further transported to the step 107.
If it is determined that the leading edge of the continuous paper 1 has been detected, 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). Thereby, the rotating blade 21 and the cams 25a and 25b rotate again, and when the cutting edge of the rotating blade 21 is directed downward in accordance with the transfer of the continuous paper 1 based on the cutting size signal input in advance, the cam 25a, The small-diameter portion 25b faces downward, and the pair of in-feed rollers 7a, 7b and the high-speed rollers 8a, 8b sandwich the continuous paper 1. 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.

In the above-described embodiment, since the sheet leading edge detection sensor 34 is provided between the rotary blade 21 and the high speed rollers 8a and 8b, the next sheet leading edge is always detected after each cutting operation. Since the control operation is performed based on the detection signal, an extremely accurate cutting operation can be performed.

Note that the present invention is not limited to the above-described embodiment. For example, the paper detection mechanism is not limited to an optical sensor, and may be a sensor using a sound wave or the like. Depending on the position, a detection signal may be generated when the trailing edge of the sheet is detected. Further, the rotation of the rotating blade 21 and the cams 25a and 25b is controlled by the clutch 23.
May be performed by using a pulse motor or a servomotor.

Effects As is apparent from the above description, according to the present invention, the continuous paper that has been transported is detected, and the cutting operation is controlled based on this detection signal and the cutting size signal that is input in advance, and the rotating blade is controlled. A pair of infeed rollers and a pair of high-speed rollers are moved in the contact direction by a moving mechanism equipped with a cam provided on the rotating shaft to pinch and cut continuous paper. This has the effect that the paper can be cut into unit paper.

[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, 42 ... cutting size signal input part

Claims (1)

(57) [Claims] A transport mechanism for transporting continuous paper; and a pair of infeed rollers which are located at a rear stage of the transport mechanism and are opposed to each other so as to be relatively close to and separated from each other at a predetermined interval vertically. A pair of high-speed rollers that rotate at a higher speed than the in-feed roller, which is 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; A cutting device for nipping continuous paper with each pair of rollers and cutting the continuous paper into unit papers with the blade using a difference in transport speed between the pair of in-feed rollers and the pair of high-speed rollers. A cam provided on a rotating shaft of a rotating blade that protrudes by being rotationally displaced with respect to the continuous paper transport path; A moving mechanism for moving the pair of in-feed rollers and the pair of high-speed rollers in a contact direction by the displacement of the cam due to the rotation of the rotating blade to pinch the continuous paper; A paper detecting mechanism for detecting that the continuous paper has been transported, and a cutting control device for controlling a nipping operation of the continuous paper by the moving mechanism based on a detection signal of the paper detecting mechanism and a cutting size signal input in advance. A continuous paper cutting device characterized by the above-mentioned.