JP2002346983A - Stacked sheet cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stacked sheets cutter capable of reading a cutting mark while gripping a stacked sheets by a gripper, automatically positioning the cutter and the stacked sheets, and cutting the stacked sheets with high accuracy. SOLUTION: The cutting mark of the stacked sheets 1 on a rotary table 2 is read by a camera 3 above the sheets while gripping the stacked sheets 1 by the gripper 8, the angle to a cutting blade 5a is adjusted by the rotary table 2 using the signal from a control device 4. In addition, the cutting mark on the side surface of the stacked sheets is read by a camera 6 mounted so as to read the side surface of the stacked sheets to detect the state of deviation of the cutting mark. A movable table 7 is moved by the signal from the control device 4 to position the stacked sheets.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cutting a sheet by moving a rotary table and a moving table on which a sheet is loaded to a cutting position while fixing the sheet by a gripper.

[0002]

2. Description of the Related Art Conventionally, in cutting margins and cutting unit blocks of stacked sheets on which printed sheets are stacked, an operator often sends the stacked sheets to a cutting section such as a shear and strikes the stacked sheets against a back fence. After that, the stacking sheet is pushed out to the cutting position by the back fence, and cutting is performed based on a cutting mark added at the time of printing. In some cases, a cutting device that intermittently feeds the loaded sheet with a pusher and cuts it into small blocks, clamps the loaded sheet front end using a gripper, passes the loaded block from the entrance side between the upper blade and the lower blade, and There is also disclosed an apparatus for extracting a required amount of paper and cutting the stacking block by positioning a cutting portion of the stacking block between an upper blade and a lower blade (see Japanese Patent No. 2771151).

In Japanese Patent Application Laid-Open No. 2000-1253, upstream and downstream conveyors for transporting a sheet-like work are arranged movably between the conveyors, and the leading and trailing ends of the sheet-like work are cut. A position detecting device that is disposed above the cutting device and the upstream conveyor and detects a position of the sheet-like work on the upstream conveyor, and a control device that moves the cutting device based on a signal from the position detecting device is provided. A cutting device is disclosed.

[0004]

As in the conventional method, the stacked sheets are pushed out and cut by the back fence after being hit against the back fence, or the stacked sheets are pushed out and cut intermittently by the pusher. By pressing, the stacking of the sheets may be broken, and cutting may not be performed at an appropriate position. In addition, if there is a deviation in the cutting mark, the operator adjusts the cutting position based on his or her experience, and there is a possibility that the product may vary.

[0005] In an apparatus for holding a stacking sheet by a gripper and pulling out and cutting the stacking block, there is a possibility that the lowermost sheet of the block may be stained by dragging the stacking block.

In the above-mentioned Japanese Patent Application Laid-Open No. 2000-1253, the position of the sheet-like work is detected by a position detecting device on the upstream conveyor, and the conveyer and the cutting device are moved by the control device to cut the sheet. Determine the position and cut. In this method, the sheet-like work and the cutting device can be easily positioned, but since the sheet-like work cannot be held down during transportation by the conveyor and at the time of cutting, paper misalignment occurs. There is a possibility that the cutting will not be performed at the correct position.

Further, although it is possible to cut the front end and the rear end of the sheet-like work, when cutting the remaining left and right margins, the sheet-like work is again placed on the upstream conveyor. Or another device must be provided, which is not efficient.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is possible to move a table under a cutting device while fixing a loading sheet and rotate or move the table without shifting the paper. Thus, there is provided a stacking sheet cutting apparatus for efficiently cutting the top and bottom margins and small blocks of the stacking sheet.

[0009]

According to the present invention, there is provided a cutting apparatus for cutting a top and bottom margin of a stacked sheet and a unit block while holding the stacked sheet with at least one gripper mechanism. Equipped with a gripper mechanism,
A rotary table mechanism capable of rotating by 360 °, a transport table incorporating the rotary table mechanism, a cutting position adjusting mechanism for moving on a transport rail and taking a loaded sheet in and out of a cutting blade, and a cutting table adjusting mechanism arranged on the rotary table. A first detecting device that reads a cutting mark of the stacked sheet and detects an angle with respect to a cutting blade; a second detecting device that is disposed on a side surface of the transport table and detects a state of a shift of the cutting mark; A stacking sheet cutting device, comprising: a control device that calculates an appropriate cutting position based on information from a second detection device, rotates the rotary table, and moves a transport table.

According to the present invention, at least one or more gripper mechanisms disposed on the rotary table mechanism always hold the loaded sheet by the gripper mechanism when rotating the table, moving the transport table, and cutting the loaded sheet. Therefore, the displacement of the stacked sheets can be prevented. When the gripper mechanism is located below the trimming clamp, the gripper mechanism is retracted in advance to avoid collision with the trimming clamp, but before the gripper mechanism retreats, another gripper mechanism is activated, and at least one of the stacked sheets must be moved. This is a stacking sheet cutting device that holds the above.

Further, according to the present invention, the adjustment of the angle with respect to the cutting blade is performed by holding the loaded sheet by the gripper mechanism and rotating the rotary table by the motor and the driving device while the stacked sheet is placed on the rotary table. The trimming position is adjusted by rotating the transport screw incorporating the rotary table in a forward or reverse direction via a motor and a driving device while holding the loaded sheet by a gripper mechanism and mounting the sheet on the rotary table. This is a stacking sheet trimming device that moves on the transport rail in the front-rear direction of the trimming blade and performs adjustment.

As described above, according to the present invention, the stacked sheets are held by the gripper mechanism installed on the rotary table, and are fixed so as not to cause a sheet shift. Then, the first detection device installed above the stacking sheet detects the printing pattern or the cutting mark state of the stacking sheet, calculates an appropriate cutting position with the control device, and rotates the stacking sheet fixed from the control device. A signal is sent to the table to finely adjust the angle between the cutting device and the stacked sheets.

[0013] Further, a shift of the cutting mark is detected by a second detecting device installed on the side of the stacking sheet, a proper cutting position is calculated by the control device, and a signal is sent from the control device to the moving table. And fine adjustment of the cutting position before and after the stacking sheet.

The stacking sheet used in the present invention is a stacking sheet cutting device which is a printed paper or film.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a view showing one embodiment of a stacking sheet cutting apparatus according to the present invention. FIG. 1A is a plan view of the stacking sheet cutting apparatus, and FIG. It is a side view. In the present embodiment, the number of gripper mechanisms for holding the stacked sheets is three, but of course one may be provided.

As shown in FIGS. 1A and 1B, a stacking sheet cutting apparatus according to the present invention includes grippers 8a, 8b, 8c for fixing a stacking sheet 1, a stacking sheet and cutting. A rotary table 2 for adjusting the angle with the unit, a moving table 7 for adjusting the position of the loading sheet in the front-rear direction, and a cutting table which is installed above the moving table and cuts the loading sheet. Cutting blade 5
a and a cutting clamp 5b.

The rotary table 2 includes a motor 9 for driving the table, a drive box 10, and a gear 11 for transmitting rotation from the drive box and rotating the rotary table. Rotate about axis P. At this time, the rotation can be transmitted by the timing belt.

The movable table 7 is fixed to a slide bearing (not shown) which moves on a guide rail 13 which is firmly fixed to the cutting machine base 12. The feed screw 14 and the movable table 7 installed below the movable table are connected by a support bracket 17, and the movable table is moved by rotating the feed screw.

The feed screw 14 is rotatable in both forward and reverse directions by a motor 15 and a drive box 16 connected to the motor 15, so that the moving table 7 can be moved back and forth. I have.

A camera 3 for reading a cutting mark of the loading sheet 1 is provided above the rotating table 2. The signal from the camera 3 is sent to the control device 4 to calculate the angle deviation from the reference position stored in the control device 4 in advance, and the signal is sent from the control device 4 to the motor 9 for driving the rotary table. The rotary table 2 is rotated about the rotation axis P during feeding.

On the side of the movable table 7, there is provided a camera 6 for reading the state of displacement of the cutting marks on the loading sheet 1. The signal from the camera is sent to the control device 4 to calculate the trimming position from the state of the trimming mark shift, and a signal is sent from the control device 4 to the motor 15 for driving the feed screw 14 to move the moving table 7. It is designed to move to the cutting position.

FIG. 2 is a diagram showing a situation where the stacked sheets 1 enter the rotary table 2 of the cutting apparatus. The stacking sheet 1 completes the butting, passes through the moving table 7 of the cutting device by a transport mechanism (not shown), and is transported onto the rotary table 2. At this time, the grippers 8a, 8b, 8c
And is not hindered in transporting the loading sheet.

FIG. 3 is a diagram showing the operation of the gripper for fixing the stacked sheets conveyed and stacked as described above. The gripper mechanism includes a gripper-base 18 (a, b,
c), lower fluid cylinder-19 (a, b, c), gripper
8 (a, b, c) and the upper fluid cylinder 20 (a, b, c). As shown in the figure, when the loading sheet 1 comes to the set position, the reference sheet 2 corresponding to the reference side when printing the loading sheet is set.
The gripper base 18 at the side position is pushed by the lower fluid cylinder 19 to raise the gripper base 18 to a position where the gripper 8 is higher than the loading sheet, and push the loaded sheet 1 against the gripper base 18. Hit it. Then, the gripper 8 is pushed out by the upper fluid cylinder 20 to a position where the loading sheet 1 is held down.
The loading sheet 1 is fixed by lowering the gripper base 18 by 9.

Next, the stacked sheets fixed in this manner are cut in the order of the cutting process shown in FIG. A method of cutting a blank portion of a stacked sheet will be described with reference to the drawings.
As shown in FIG. 4A, the gripper 8a, 8b located on the reference side at the time of printing fixes the stacking sheet 1 first. Then, the right side of the loading sheet (shaded area in the figure) is cut.

Next, as shown in FIG. 4B, the rotary table 2 is rotated by 90 °, and the next cutting (shaded portion in the figure) is performed.
At this time, since the gripper 8c is stored in the rotary table, it does not hinder cutting.

Next, trimming of the margins held by the grippers 8a and 8b is performed. As shown in FIG. 4C, after the gripper 8c fixes the stacking sheet 1, the gripper 8b is retracted, and thereafter, the rotary table is rotated by 90 ° to perform cutting (hatched portion in the figure).

Next, as shown in FIG. 4 (D), after the gripper 8b fixes the stacking sheet 1, the gripper 8a is retracted, the rotary table is rotated by 90 °, and cutting (hatched portion in the figure) is performed. With the above procedure, the cutting of the top and bottom margins of the stacked sheet is completed.

Next, FIG. 5 shows a case where the stacking sheet 1 is cut into blocks. After the above-described margin trimming, the turntable 2 returns to the original position and is fixed. Thereafter, the moving table 7 moves by a required amount, and cuts the stacked sheets 1 into blocks. At this time, the grippers 8a and 8c are retracted,
The gripper 8b fixes the stacking sheet 1. The cutting is performed sequentially in this manner. At this time, the gripper at the cutting position is retracted, but one or more grippers always fix the loading sheet 1, and when moving or cutting. To prevent paper misalignment.

FIG. 6 shows a method of finely adjusting the angle of the stacked sheet with respect to the cutting blade. The cutting mark 21 on the loading sheet is
The data is read by a camera 3 (not shown) installed above the rotary table, a signal is sent to a controller 4 (not shown), and a deviation α of the angle with the cutting blade of the cutting section is calculated.
Is rotated to fine-tune the angle. The angle can be finely adjusted manually.

FIG. 7 shows a method of correcting a shift of a cutting mark on a stacked sheet. A loading seat is provided by a camera 6 (not shown) installed on a side surface of a movable table 7 (not shown).
The cutting state of the cutting mark 21 provided at the time of printing is read on the side surface of the printer 1 and a signal is sent to the control device 4 (not shown). The controller detects the range R of the cutting mark deviation from the transmitted signal, calculates the cutting position, moves the moving table 7 by the calculated value obtained, and performs fine adjustment.
The fine adjustment can be performed manually.

[0032]

As described above, according to the stacked sheet cutting apparatus of the present invention, the stacked sheets are held by at least one or more gripper mechanisms. Displacement can be reliably prevented, and since the loaded sheet is not dragged, the generation of dirt can be prevented. Further, the state of deviation of the cutting mark is read from the upper and side surfaces of the loading sheet by a camera, and the rotating table and the moving table are moved by the control device, so that the cutting can be performed with high precision.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of a stacked sheet cutting apparatus according to the present invention.

FIG. 2 is a diagram showing a situation in which a loading sheet enters a rotary table of the cutting device.

FIG. 3 is a view showing the operation of a gripper for fixing a loading sheet.

FIG. 4 is a view showing a cutting process, and shows an order of margin cutting.

FIG. 5 is a diagram showing the order of block cutting.

FIG. 6 is a diagram showing a method of finely adjusting the angle of the loading sheet.

FIG. 7 is a diagram showing a method of finely adjusting a loading sheet in the front-rear direction.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 loading sheet 2 rotating table 3, 6 camera 4 control device 5 a cutting blade 5 b clamp 7 moving table 8 a, 8 b, 8 c gripper 9 rotating table driving motor 10, 16 drive box 11 gear 12 cutting machine stand 13 guide rail 14 feed Screw 15 Motor 17 Support bracket 18 Gripper stand 19 Lower fluid cylinder 20 Upper fluid cylinder 21 Cutting mark

Claims (6)

[Claims] 1. A cutting device for trimming a top and bottom margin of a loaded sheet and a unit block while holding the loaded sheet with at least one or more gripper mechanisms, comprising the gripper mechanism and rotating by 360 °. A cutting table adjustment mechanism that moves on a conveyance rail and puts a stacking sheet in and out of a cutting blade, and a cutting table adjustment mechanism that disposes the stacking sheet on the rotation table. The first to read the cutting mark on the sheet and detect the angle to the cutting blade
A second detecting device disposed on the side of the transport table and detecting a state of deviation of the cutting mark; and calculating an appropriate cutting position based on information from the first and second detecting devices. And a controller for rotating the rotary table and moving the transport table. 2. The apparatus according to claim 1, wherein at least one gripper mechanism disposed on said rotary table mechanism is configured to rotate the table,
When moving the transport table and cutting the stacked sheets,
The stacking sheet cutting device according to claim 1, wherein the stacking sheet is held by the gripper mechanism to prevent the stacking sheet from shifting. 3. The gripper mechanism is retracted in advance when positioned below the trimming clamp to avoid collision with the trimming clamp. However, before the gripper mechanism retreats, another gripper mechanism operates and the stacking sheet is always 3. The method as claimed in claim 1, wherein at least one of the following is held.
An apparatus for cutting a loaded sheet according to the description. 4. The method according to claim 1, wherein the adjustment of the angle with respect to the cutting blade is performed by rotating the rotary table by a motor and a driving device while holding the stacked sheets by a gripper mechanism and mounting the stacked sheets on the rotary table. The stacking sheet cutting device according to 1, 2, or 3. 5. The cutting position is adjusted by holding the stacking sheet by a gripper mechanism and placing the stacking sheet on a rotary table.
The feed table incorporating the rotary table is rotated by a feed screw in a forward or reverse direction via a motor and a driving device, thereby moving the feed rail on the feed rail in the front-rear direction of the cutting blade and performing adjustment. Claims 1, 2, and 3
Or the cutting device for stacking sheets according to 4. 6. The stacking sheet cutting apparatus according to claim 1, wherein the stacking sheet is printed paper or film.