JPH081840Y2 - Continuous paper cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention is arranged between a pair of upper and lower infeed rollers and a pair of upper and lower high speed rollers for cutting continuous sheets into unit sheets. The present invention relates to a continuous paper cutting device that includes a blade and cuts continuous paper by utilizing a difference in transfer speed between the infeed roller and the high speed roller.

[Conventional technology]

Conventionally, there is a blade that is rotatably displaced in a continuous sheet cutting device of this kind and is provided so that its arrangement position can be adjusted in the transfer direction of the continuous sheet, but there is one that is vertically adjustable. do not do. Therefore, the amount of protrusion of the rotationally displaced blade with respect to the continuous sheet transport path is always unchanged.

[Problems to be solved by the device]

For this reason, in the conventional case, it is difficult to appropriately cut the continuous paper according to the paper thickness, and particularly when the paper thickness is large, the perforation for cutting cannot reliably cut the continuous paper. There is a drawback that weak parts other than the perforations for cutting are broken.

It is an object of the present invention to provide a continuous paper cutting device that solves this drawback.

[Means for solving the problem]

A pair of upper and lower infeed rollers that rotate at a rotation speed corresponding to the transfer speed of the continuous paper, and more than the infeed rollers that are arranged at a predetermined stage behind the infeed rollers in the continuous paper transfer direction. A pair of upper and lower high-speed rollers that rotate at high speed, and a blade disposed between the in-feed roller and the high-speed roller, at least the high-speed roller of the in-feed roller and the high-speed roller, relative to each other. Of the continuous paper, the continuous paper is sandwiched by moving in the contact direction when the continuous paper is cut, and the continuous paper is moved by utilizing the difference in transfer speed between the infeed roller and the high speed roller. A continuous paper cutting device for cutting, wherein the blade is provided on a rotary shaft, and is rotated by displacing the blade. Feed mechanism between the feed roller and the high-speed roller, and an adjusting mechanism for setting the protruding position of the blade while projecting with respect to the continuous sheet transport path, and at least the high mechanism according to the rotation of the rotating shaft provided with the blade. A cam mechanism for moving the speed roller in the contacting / separating direction is provided, and a control unit for controlling the rotation operation of the rotating shaft provided with the blade is provided.

[Action]

Since the protruding position of the blade which is rotationally displaced can be adjusted, the amount of protrusion of the continuous paper with respect to the transfer path can be adjusted, and the timing when the blade protrudes with respect to the continuous paper transfer path, and at least the high speed roller is The timing at which the continuous paper is moved in the contact direction to be transported can be accurately set by controlling the rotation operation of the rotary shaft.

〔Example〕

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 the entire sheet processing apparatus including a cutting device equipped with a rotary blade, a part of which is omitted, and FIG. FIG. 3 is a partial sectional view of the same, FIG. 3 is a perspective view of a cutting device equipped with a rotary blade, and FIG. 6 is a side view showing a cam mechanism for moving to a position, FIG. 6 is a block diagram of a cutting control device, and FIG.
FIG. 8 is a timing chart of the cutting operation, and FIG. 8 is a flowchart of the same.

As shown in FIG. 1, the continuous paper 1 to be cut into unit papers 1a is folded zigzag at the perforation / cutting perforations 2 which are cutting portions thereof, placed at a predetermined position, and pulled out upward. The 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 the tractor pins of the tractor 4, and the tractor 4 is rotationally driven by the main motor 41 (see FIG. 6). It is configured to be transferred to the right in FIG. Then, the continuous paper 1 is moved by the slitter 5 arranged near the end of the tractor 4 in the transfer direction.
The marginal portion 3 is cut off, further transported in the same direction, and supplied to the cutting device 6.

Next, the cutting device 6 including the rotary blade will be described with reference to FIGS. 1 to 5.

As shown in FIG. 1, after the tractor 4, a pair of upper and lower infeed rollers 7a and 7b which are arranged facing each other with a space of about 1 mm so that they can freely come into contact with each other, and these infeed rollers 7a and 7b.
1m at a predetermined interval in the transfer direction with a and 7b so that they can also come in and out freely
A pair of upper and lower high-speed rollers 8a and 8b are provided facing each other with an interval of about m. As shown in FIG. 4, the infeed rollers 7a, 7b and the high speed rollers 8a, 8b are provided with tooth portions 9a, 9b and tooth portions 10a, 10b, which can be meshed with each other, on the peripheral surfaces at the respective one ends thereof. It is provided. The tooth portion 9b meshes with the gear 12 provided on one end side of the shaft 11. The other end of the shaft 11 is provided with a gear 13 having the same number of teeth as the gear 12, and one end of a shaft 14 extending in parallel with the shaft 11 has a smaller number of teeth than the gear 13. A gear 15 is provided. And, between the gears 13 and 15 and the gear (not shown) connected to the output shaft of the main motor 41 (see FIG. 6), there is an uneven surface that engages with the gears 13 and 15. An endless belt 16 is stretched around. On the other end side of the shaft 14, a gear (not shown) having the same number of teeth as the gear 15 meshing with the tooth portion 10b is provided. As described above, since the gears 13, 15 and 12 have different numbers of teeth, the high speed roller 8b rotates at a higher speed than the infeed roller 7b, and both of them rotate clockwise in FIG. Is configured.

As shown in FIGS. 1 and 4, a gear 20 having the same number of teeth as the gear 15 provided at one end of the shaft 14, and a rotary shaft 22 to which a rotary blade 21 is attached are provided at one end through a clutch 23. An endless belt 24 is stretched between the gears (not shown). Therefore, when the clutch 23 is engaged, the rotary shaft 22 rotates at the same speed as the shaft 14, and the rotary blade 21 also rotates counterclockwise in FIG. 1 together with the rotary shaft 22. Due to this rotation, the rotary blade 21 protrudes with respect to the transport path of the continuous paper 1 when the blade edge faces downward. The position of the cutting edge of the rotary blade 21 in the initial state is not specified, but a position that does not interfere with the conveyance of the continuous paper 1 is set as an original position, and the cutting timing of the continuous paper 1 is determined with this position as a reference. Also, the fourth
Although not shown in the figure, in addition to the clutch 23, the shaft 22
A brake 38 (see FIG. 6) for stopping the rotation of the motor is provided.

As shown in FIGS. 2 and 3, the rotary blade 21 is
A blade portion 21a which has a long center in the longitudinal direction and is inclined toward both ends in the same direction and which is longer than the width of the continuous paper 1 formed in a semi-cylindrical shape.
And a mounting portion 21b which is plate-shaped and has two vertically elongated long holes 42 (only one is shown) provided near both ends in the longitudinal direction. The rotary blade 21 is divided into two parts so that the rotary shaft 22 can be sandwiched at intervals corresponding to the thickness of the mounting portion 21b, and the rotary blade 21 has a diameter substantially equal to the lateral width of the elongated hole 42 and faces each other. Threaded holes 43,44
And a pair of left and right annular collars 4 with 45, 46, 47, 48
It is fastened and fixed to the rotary shaft 22 with screws 51, 52, 53, 54 via 9,50. The screws 51 and 53 are the long holes 4 of the rotary blade 21.
Since 2 is inserted, the rotary blade 21 can be moved up and down within the allowable range of the elongated hole 42, whereby the height position of the rotary blade 21 can be adjusted. That is, it is possible to adjust the protrusion amount of the rotary blade 21 with respect to the transport path of the continuous paper 1. The aforementioned long hole 42,
A pair of left and right annular collars 49,50 having screw holes 43,44 and 45,46,47,48 and screws 51,52,53,54 constitute an adjusting mechanism for setting the protruding position of the rotary blade 21. . 2 and 3, the rotary blade 21 is at the uppermost position, in other words, the most protruding position farthest from the rotary shaft 22,
In this state, the amount of protrusion of the continuous paper 1 with respect to the transport path is maximized.

As shown in FIGS. 4 and 5, a pair of disc-shaped cams 25a and 25b are eccentrically fixed to the rotary shaft 22, and the rotary blade 21 of the cams 25a and 25b transfers the continuous paper 1. When protruding into the path, the pair of infeed rollers 7a, 7b and the pair of high-speed rollers 8a, 8b are moved in the contact direction so that their tooth portions 9a, 9b and 10a, 10b are meshed with each other to form the continuous paper 1. Hold it. Then, the pair of infeed rollers 7
The cam mechanism including the cams 25a and 25b for moving the a and 7b and the pair of high-speed rollers 8a and 8b in the contact and separation directions will be described, but the configurations regarding the cams 25a and 25b are the same. Therefore, only the cam 25a will be described.

The state of the cam 25a corresponds to the state of the rotary blade 21, and although it is not clear in the figure, the cam 25a is fixed to the rotary shaft 22 so that its minimum diameter portion and the cutting edge are located at corresponding positions. Then, the cam 25a is in a state where its small diameter portion is not located in the lower portion in the standby state, for example, as shown in FIG.
Shafts 26, 2 respectively
While contacting idle rollers 28a, 29a provided at one end of each of support arms 28, 29 swingably supported by 7, idle rollers 28b, 29b provided at the other end of each of said support arms 28, 29. Respectively support disk-shaped receiving portions 30 and 31 provided at one end of the infeed roller 7a and the high speed roller 8a located above. As a result, in the standby state of the cam 25a, the pair of infeed rollers 7a, 7b and the high speed rollers 8a, 8b are vertically separated from each other.

As the rotary shaft 22 rotates, each cam 25a, 25a
When b is rotationally displaced in the counterclockwise direction in FIG. 5 together with the rotary blade 21 and the small diameter portions of the cams 25a and 25b are positioned below, the support arm 28 swings counterclockwise in the same figure with the shaft 26 as a fulcrum. When the support arm 29 moves, the support arm 29 swings clockwise about the shaft 27 as a fulcrum, and the rollers 7a and 8a are lowered. As a result, the pair of infeed rollers 7a, 7b and the tooth portions 9a, 9b and 10a, 10b of the high speed rollers 8a, 8b, respectively.
Mesh with each other and can rotate in a predetermined direction while holding the continuous paper 1.

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,
32b is provided, and the unit sheets 1a transferred by these transfer rollers 32a, 32b are configured to be sequentially stacked on the stacker 33.

Next, the cut size of the continuous paper 1, that is, the unit paper 1a
A disconnection control device for controlling each operation including engagement / disengagement of the clutch 23 for setting the rotation timing of the rotary blade 21 in accordance with the length of will be described with reference to FIGS. 1 and 6.

The control operation is all performed by the CPU 35, which is a control unit shown in FIG. 6, and a pair of light beams are provided at positions vertically sandwiching the transfer path of the continuous paper 1 between the high speed rollers 8a, 8b and the rotary blade 21. Paper edge detection sensor consisting of a sensor
34 is arranged, and this paper leading edge detection sensor 34 is continuous paper 1
The detection signal is input to the CPU 35 when the tip of the is detected. Further, to the CPU 35, 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 rotating blade 21 from the blade encoder 37 are input. Is configured. Further, 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 input a transfer speed setting signal. Then, based on these input signals, the CPU35
From the power circuit 39, the control signal is output to the clutch 23, the brake 38, and the main motor 41, and the rotation control of the rotary shaft 22 is performed by performing the drive control of these, and the rotary blade 21 and the cam 25a. The operation of 25b is controlled.

Next, the sheet cutting operation of this embodiment will be described with reference to FIGS. 1, 7, and 8.

First, prior to the cutting operation, the protruding amount of the rotary blade 21 is adjusted according to the paper thickness of the continuous paper 1. This adjusting operation loosens the screws 51, 52, 53, 54 and the rotary shaft 22. It is carried out by moving in the direction away from, set at a predetermined position and tightening the screws 51, 52, 53, 54. The operation of rotating the rotary blade 21 from the initial position to the predetermined standby position will be described below.

As shown in FIG. 1, the continuous paper 1 is pulled out, and its transfer hole is engaged with the pin 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 and the tractor 4, the infeed roller 7b, and the high speed roller 8b are rotationally driven in a predetermined direction, and the continuous paper 1 While the transfer is started, the clutch 23 is engaged (step 10
2), the rotary blade 21 and the cams 25a and 25b also start to rotate in a predetermined direction. Subsequently, the tractor encoder 36 detects the transfer 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 apex, that is, the original position (step 10).
3). And if it is judged that it has not reached, step 1
Moving to 05, the CPU 35 also causes the speed correction brake counter in the CPU 35 to operate on the tractor encoder.
The 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. It should be noted that the correction data has a smaller value as the transfer speed is faster, so that the timing for applying the brake is set earlier. When it is determined that the correction data corresponding to the transfer speed of the continuous paper 1 is not set in the speed correction brake counter, the process proceeds to step 107, and it is determined whether the leading end of the continuous paper 1 is detected by the paper leading edge detection sensor 34. Is determined by the CPU 35. The leading edge of the continuous paper 1 is the leading edge detection sensor 34.
If not determined by step 109
Move to, the clutch counter in CPU35 is set, the countdown is done and the counter value has become zero,
Whether or not it is determined by the CPU 35. When it is determined that the clutch counter is not set, the process proceeds to step 111,
The CPU 35 determines whether or not the correction data is set in the speed correction clutch counter in the CPU 35, and the countdown is performed so that the counter value becomes zero.
Similar to the correction data of the speed correction brake counter described above, this correction data also has a smaller value as the transfer speed of the continuous paper 1 is faster, and the timing for disengaging the clutch 23 is set earlier. Here, when it is determined that it has not become zero, the process returns to step 103, and the above-described operation is repeated until the blade edge of the rotary blade 21 reaches the apex which is the original position.

In step 103, the cutting edge of the rotary blade 21 reaches the apex,
If it is determined that the original position is present, the correction data corresponding to the transport 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, it is determined whether or not the counter value of the set correction data has become zero, and if not, the same as described above, through steps 107, 109, 111, step 103 Return to. In this step 103, if it is once determined that the rotary blade 21 is in the original position, the process proceeds to step 105.

Then, when it is determined in step 105 that the count value of the correction data of the speed correction brake counter is not zero, as described above, the process returns from step 107 to each of steps 109, 111 and 103 to step 105 to repeat this operation. On the other hand, when 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 rotary blade 21 is stopped at a position where the blade edge has passed the apex and advanced 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, the cutting operation based on the sheet cutting size and the sheet leading edge detection signal issued at every predetermined time according to the sheet transfer speed will be described.

The continuous paper 1 continues to be transported by the tractor 4,
Whether the leading edge is detected by the sheet leading edge detection sensor 34,
Whether or not it is determined (step 107), and when it is determined that it is not detected, the operation of returning from step 109 to each of steps 111, 103 and 105 and returning to step 107 is repeated as described above. On the other hand, the continuous paper 1 has the infeed rollers 7a and 7b in the separated state and the rotary blade 2 in the standby state.
When it is judged that the leading edge of the continuous paper 1 is detected after passing 1 and further transferred in step 107, 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 steps from step 111 to step 1 are performed as described above.
The operation of returning to step 109 through 03, 105, 107 is repeated.
On the other hand, when it is determined in step 109 that the count value of the clutch counter has become zero, correction data corresponding to the transport speed of the continuous paper 1 is set in the speed correction clutch counter, and the countdown is started (step 110). ).

Then, the process proceeds to step 111, and it is determined whether or not the count value of the correction data set is zero, and if it is determined that the count value is not zero, then from step 103 through steps 105, 107, and 109 as described above. The operation of returning to step 111 is repeated. On the other hand, when 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 rotary blade 21 and the cams 25a and 25b rotate again, and when the blade edge of the rotary blade 21 faces downward in accordance with the transfer of the continuous paper 1, the small diameter portions of the cams 25a and 25b face downward. The pair of infeed rollers 7a, 7b and the high speed rollers 8a, 8b are in a state of sandwiching the continuous sheet 1, and the continuous sheet 1 is a unit sheet at the folding and cutting perforations 2.
Cut to 1a.

By repeating the above operation, the continuous paper 1 is cut into each unit paper 1a, and each unit paper 1a is sequentially fed by the feed roller.
It is sent to the stacker 33 by 32a and 32b and stacked there.

It should be noted that the present invention is not limited to the above-described embodiment, and for example, the blade portion 21a of the rotary blade 21 may be the continuous paper 1
In addition to being longer than the width of the rotary blade 21, it may be shorter than this width, and the shape of the rotary blade 21 can be variously changed. Further, the position adjustment of the rotary blade 21 in the vertical direction may be configured such that the position of the rotary shaft 22 can be adjusted in the vertical direction in addition to adjusting the mounting position on the rotary shaft 22. In this case, a pair of upper and lower infeed rollers 7a, 7 as in the above-described embodiment.
If the mechanism for holding the continuous paper 1 by moving the b and the high speed rollers 8a, 8b in the contacting / separating direction respectively is connected to the rotating mechanism of the rotating shaft 22, its structure becomes complicated. It is preferable that the mechanism is not connected to the rotating mechanism of the rotating shaft 22. Further, the nipping of the continuous paper 1 at the time of cutting is performed by moving the pair of upper and lower infeed rollers 7a, 7b and the high speed rollers 8a, 8b respectively in the contact and separation directions, and only the high speed rollers 8a, 8b. By moving the infeed roller 7a, 7b,
You may comprise so that the continuous paper 1 may be pinched. further,
The rotation control of the rotating blade 21 and the cams 25a and 25b is performed by the clutch 2
In addition to disconnection in 3, you may use a pulse motor or servo motor. Further, the rotation control of the rotary blade 21 based on the cut size of the continuous paper can determine the cut size based on the detection signal of the leading edge of the paper and the paper feed amount as well as the paper feed amount alone.

〔effect〕

As is apparent from the above description, according to the present invention, it is possible to adjust the protrusion amount of the blade which is rotationally displaced with respect to the continuous paper transport path, and the timing of the blade protrusion and the contact between the infeed roller and the high speed roller. Since the timing to move in the direction can be set accurately, there is an effect that the continuous paper can always be cut accurately and smoothly into unit paper even if the thickness of the continuous paper is different.

[Brief description of drawings]

FIG. 1 shows a preferred embodiment of the present invention, FIG. 1 is a schematic explanatory view of the entire sheet processing apparatus including a cutting device having a rotary blade, a part of which is omitted, and FIG. A front view showing a state where the rotary blade is attached to the rotary shaft is omitted, FIG. 3 is a partial sectional view of the same, FIG. 4 is a perspective view of a cutting device portion equipped with the rotary blade, and FIG. 5 is an infeed roller. FIG. 6 is a side view showing a cam mechanism for moving the high speed roller and a high speed roller in a contacting / separating direction. FIG. 6 is a block diagram of a cutting control device.
FIG. 8 is a flowchart of the same. 1 ... Continuous paper, 2 ... Folding and cutting perforations, 4 ...
Tractor, 6 ... Cutting device, 7a, 7b ... Infeed roller, 8a, 8b ... High speed roller, 21 ... Rotating blade, 22 ... Rotating shaft, 23 ... Clutch, 25a, 25b ... Cam, 35 …… CPU, 42 …… slot, 49,50 …… color, 51,52,
53,54 …… screws

Claims (1)

[Scope of utility model registration request] 1. A pair of upper and lower infeed rollers that rotate at a rotation speed corresponding to the transfer speed of continuous paper, and a pair of infeed rollers that are arranged at a predetermined interval behind the infeed rollers in the continuous paper transfer direction. A pair of upper and lower high-speed rollers that rotate at a higher speed than the infeed roller, and a blade disposed between the infeed roller and the high-speed roller, and at least the high-speed roller of the infeed roller and the high-speed roller. The speed roller is configured to be relatively movable in the contact and separation directions,
A continuous paper cutting device that moves in the contact direction during cutting of continuous paper to hold the continuous paper and cut the continuous paper by utilizing the difference in transfer speed between the infeed roller and the high speed roller, wherein the blade Is provided on a rotary shaft, and is rotatively displaced so as to project when a continuous sheet is cut with respect to a continuous sheet transport path between the infeed roller and the high speed roller, and an adjustment for setting a projecting position of the blade. A mechanism and a cam mechanism that moves at least the high speed roller in the contact and separation direction with the rotation of the rotating shaft provided with the blade, and a control unit that controls the rotating operation of the rotating shaft provided with the blade. A continuous paper cutting device characterized by being provided.