JP4859302B2 - Rotating paper cutting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a turning-sheet cutting apparatus that cuts and aligns a sheet bundle, for example, a top portion, a ground portion, and a fore edge portion of a booklet that has undergone cover attachment processing, using a single cutting unit.
[0002]
[Prior art]
For example, a bookbinding machine that produces and discharges a booklet in which hot melt paste is applied to the back of the body (the contents of the book) and a cover is attached is well known. A booklet bound by such a bookbinding machine may be trimmed on the top and bottom of the booklet and trimmed. FIG. 9 shows an example of this case. Booklets attached by the bookbinding machine 1 and discharged one after another are conveyed by a conveyor 2 that moves at a speed that matches the bookbinding processing speed of the bookbinding machine 1.
[0003]
A predetermined number of booklets conveyed by the conveyor 2 are stacked by a booklet stacking mechanism 3, and the stacked booklets are sent to a conveyor 4 that moves at a low speed, and the hot melt paste applied to the back of the body is cooled and solidified. Then, it is conveyed to the three-way cutting machine 5. In general, the three-way cutting machine 5 includes a cutting unit 5a for cutting the top of the booklet, a cutting unit 5b for cutting the base of the booklet, and a cutting unit 5c for cutting the fore edge of the booklet. Yes. Each of the cutting units 5a, 5b, and 5c has a movable cutting blade and a presser plate that are driven by a hydraulic cylinder or the like. During cutting, the end of the booklet is pressed by the presser plate and the cutting blade is driven to perform cutting.
[0004]
The booklet conveyed by the conveyor 4 is arranged in a substantially U-shape and sent to the inside of the cutting unit, and the cutting blades and presser plates of the cutting unit 5a and the cutting unit 5b are driven to drive the top and bottom of the booklet. The edge of the booklet is aligned and then sent to the cutting unit 5c (slightly separated to avoid mechanical interference), and the edge of the booklet fore edge is driven by driving the cutting blade and presser plate of the cutting unit 5c. Trim. After the edges of the fore edge are trimmed, the booklet is discharged from the cutting machine 5.
[0005]
[Problems to be solved by the invention]
Thus, in the cutting by the three cutting units arranged in a substantially U shape, the space for installing these many operation mechanisms and the two-stage cutting of the top and bottom of the booklet (hereinafter referred to as a sheet bundle) are performed. It is difficult to reduce the size of the cutting machine because it requires a linear movement space for the booklet to perform, and since the three cutting blades are arranged in a narrow space, there is a high risk of cutting work, Therefore, many safety devices are required, and further, there is a problem that it is difficult to adjust the height of the cutting blade accompanying the cutting blade replacement operation.
[0006]
The present invention has been made in view of such a situation, and can cut three-sided paper bundles with a simple operation mechanism, and is highly safe, easy to operate, and can save space. An object is to provide an apparatus.
[0007]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a rotary table for positioning and mounting a sheet bundle, a transporter for transporting the sheet bundle to the rotary table, and a transport for transporting the sheet bundle placed on the rotary table to a discharge unit. And a cutting unit having a movable cutting blade and a pressing plate, and the cutting unit is fed to an edge of a sheet bundle placed on the rotating table every time the rotating table is rotated by a predetermined angle. The edge of the sheet bundle positioned by the rotation of the rotary table is cut by the cutting blade of the cutting unit.
[0008]
The present invention according to claim 2, conveyor for conveying the sheet bundle to the rotary table, the glue binding the sheet bundle for each book to be carried, the lower the loading order, gluing the rear side of the sheet bundle A stack raising mechanism that stacks and rises together, and a moving mechanism that pushes the stacked sheet bundle raised by the stack raising mechanism and moves to the rotary table .
[0009]
In the present invention, the top portion, the ground portion, and the fore edge of the sheet bundle can be cut by the rotary table that positions and fixes the sheet bundle and the one cutting unit that moves closer to and away from the rotary table. Therefore, the number of cutting units with high risk is small, the installation space can be reduced by the small number, and safety is also improved. In addition, if a stacking and raising mechanism is provided in the transporting machine that transports the sheet bundle to the rotary table, the hotmelt paste is cooled and solidified by the raising mechanism that stacks and lowers in the order of loading. In this case, the space required for cooling and solidifying the hot melt paste can be reduced.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view schematically showing the overall configuration of a sheet cutting apparatus according to an embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a front view thereof, and FIGS. 4 and 5 are views of a stack raising mechanism. FIG. 6 is a diagram illustrating the operation, FIG. 6 is a diagram illustrating the cutting operation, and FIGS. 7 and 8 are diagrams illustrating the operation of the presser plate.
[0011]
In FIG. 1, 11 is a bundle of sheets (glued and bound booklet, 11a is a back side to which glue is attached and a cover is attached, 11b is a top portion, 11c is a small edge portion, and 11d is a ground portion). , 12 is a stack raising mechanism, 13 is a push plate (may be a chuck), 14 is a chuck, 15 is a rotary table, 16 is a small edge positioning guide plate, 17 is a cutting unit, 18 is a stacker, and 19 is a sheet on the rotary table. It is a rotatable presser plate that holds and fixes a bundle.
[0012]
The stack raising mechanism 12 is installed by a first lift motor 12a by a first lift motor 12a and a first raising mechanism comprising four chains 12c that move around and attached with a sheet bundle support piece 12b, and by a second lift motor 12d. The second ascending mechanism is composed of four chains 12f that move around the circumference with the sheet bundle supporting pieces 12e attached at appropriate intervals.
[0013]
The operation of the stack raising mechanism 12 is performed by setting the maximum thickness of the sheet bundle to be cut as shown in FIG. 5 in a control device for controlling the driving of the lift motor 12a and the second lift motor 12d (not shown), and manually adjusting the sheet bundle thickness. Alternatively, the thickness information of one sheet bundle to be cut from the bookbinding machine or the printing machine is input, the number of sheet bundles to be stacked is calculated based on this information and the maximum thickness, and the stacking operation is started based on the calculation result.
[0014]
For example, when the operation result is three, as shown in FIG. 4A, one sheet bundle 11 is carried on the sheet bundle support piece 12b of the first lifting mechanism waiting at the bottom as shown in FIG. Then, the second lift motor 12d is driven in the opposite direction, and the sheet bundle (two in the figure) stacked on the sheet bundle support piece 12e positioned at the lowest stage of the second raising mechanism is converted into the first The paper is dropped and stacked on one paper bundle 11 carried on the paper bundle support piece 12b of the ascending mechanism (FIG. 4B). In this case, the three books located in the upper stage of the lowest stage of the second raising mechanism are lowered but are held on the sheet bundle supporting pieces 12e of the second raising mechanism as they are.
[0015]
Next, the first lift motor 12a is driven, and the three sheet bundles stacked on the sheet bundle supporting piece 12b of the first raising mechanism are carried to the uppermost part of the first raising mechanism (FIG. 4 ( c)), the second lift motor 12d is driven in the forward direction and received on the sheet bundle support piece 12e of the second lifting mechanism, and continues to rise by one step, and the first lifting mechanism is returned to its original position. It returns (FIG. 4 (d)). Three books positioned at the upper stage of the lowermost stage of the second raising mechanism by raising by one stage are located at the uppermost part of the second raising mechanism, and the three books are placed in front of the push plate 13.
[0016]
That is, the sheet bundle carried into the first raising mechanism is once transferred to the second raising mechanism and stands by, and when the next sheet bundle is carried into the first raising mechanism, it is delivered to the second raising mechanism. The sheet bundle that has been waiting is overlapped on the sheet bundle carried into the first raising mechanism, and this procedure is repeated until the number of sheet bundles to be accumulated obtained by calculation is reached. Transport to the top of the lift mechanism. When the sheet bundle 11 is thick, the sheet bundle 11 is not stacked, but is conveyed intermittently to the uppermost part of the second raising mechanism. By this conveyance, the glue applied to the back surface 11a of the sheet bundle 11 is cooled and solidified. In addition, a sheet bundle having a short time after pasting is positioned in the stacked lower portion, and a shift at the time of cutting is reduced.
[0017]
The push plate 13 is fixed to a belt 13b that reciprocates by driving of a motor 13a, and pushes the end portion (the top portion 11b in the figure) of the sheet bundle 11 conveyed to the uppermost portion of the second ascending mechanism and conveys it to the rotary table 15. To do. The rotary table 15 is provided with a guide plate 15a, and the guide plate 15a is set at a position parallel to the conveyance direction of the sheet bundle 11 when the sheet bundle 11 is placed and taken out. The sheet bundle 11 conveyed by the movement of the pressing plate 13 is placed on a predetermined position on the rotary table 15 with the back surface 11a abutting against the guide plate 15a. In this state, a fore edge positioning guide plate 16 that approaches or separates from the rotary table 15 by driving the motor 16a is disposed at a position facing the guide plate 15a, and the fore edge portion 11c of the sheet bundle 11 placed on the rotary table 15 is disposed. To align the fore edge portion 11c.
[0018]
After positioning the sheet bundle 11 on the rotary table 15 in this way, the rotary press cylinder 19a is driven to press and fix the sheet bundle 11 against the rotary table 15 with the presser plate 19, and the fore edge positioning guide plate 16 is fixed to the rotary table. 15 is placed in a state where it can be rotated by driving the motor 15b.
[0019]
The cutting unit 17 (see also FIG. 6) includes a holding plate 17c connected to a cutter cylinder 17d to which a cutting blade 17b is attached and a presser plate 17e connected to a pressure cylinder 17f that presses an edge of the sheet bundle 11 at the time of cutting. A support plate 17a is slidably attached. The support plate 17a is screwed into a screw shaft (feed screw) 17h that rotates by driving a motor 17g, and approaches or separates from the rotary table 15 by driving the motor 17g. Move to. The position of the cutting unit 17 is set by a drive control device of a motor 17g (not shown) according to the length dimension d1 of the fore edge portion 11c of the sheet bundle 11 and the length dimension d2 of the top and bottom portions 11b and 11d and the rotation position of the rotary table 15.
[0020]
When the sheet bundle 11 is positioned and fixed on the turntable 15, as shown in FIG. 6, the turntable 15 rotates 90 degrees clockwise and stops. At this time, the cutting unit 17 is positioned at a position where the cutting blade 17b is positioned above the end of the sheet bundle 11 placed on the rotary table 15 on the ground portion 11d side. Then, as shown in FIG. 7, the pressure cylinder 17f is driven to lower the presser plate 17e, and the end portion of the sheet bundle 11 on the ground portion 11d side (the end portion of the top portion 11b in FIG. 7) is provided on the support plate 17a. The pressure is set against the cradle 17i by the pressure set by the proportional control electromagnetic valve 20, and the cutter cylinder 17d is driven almost simultaneously, and the edge of the base portion 11d is trimmed with the cutting blade 17b.
[0021]
After cutting the edge of the base portion 11d, the presser plate 17e and the cutting blade 17b are kept at the original upper position, and the rotary table 15 is rotated 90 degrees clockwise and stopped. At this time, the cutting unit 17 is positioned at a position where the cutting blade 17b is positioned above the end portion on the small edge portion 11c side of the sheet bundle 11 placed on the rotary table 15 (d2 <d1 from the rotation center of the rotary table 15). The distance is different.) In the same manner as the cutting of the edge of the ground portion 11d, the presser plate 17e and the cutting blade 17b are driven to align the edge of the small edge portion 11c. Thereafter, similarly, the turntable 15 is rotated 90 degrees clockwise and stopped, and the edges of the top portion 11b are aligned. Thereafter, the rotary table 15 is rotated to return the guide plate 15a to the original standby position. At this time, the rotary press cylinder 19a is driven, and the pressing of the presser plate 19 is released.
[0022]
The pressure setting by the proportional control solenoid valve 20 is performed as shown in FIG. 8 by a control device for the pressure cylinder 17f (not shown). That is, the press pressure per unit length of the sheet bundle to be cut is set in the control device, and the size data of the sheet bundle to be cut is input from the manual or the bookbinding machine or the printing machine, and the edge of the edge of the sheet bundle to be cut is cut. Calculate the pressure according to each pressure by calculating the pressure and the pressure at the top and bottom cutting. When cutting the edge of the ground portion 11d of the sheet bundle 11, the proportional control electromagnetic valve 20 is controlled by a voltage corresponding to the pressing of the ground portion obtained by calculation, and the end portion of the ground portion 11d of the sheet bundle 11 is controlled by the pressing force. Press. Similarly, when cutting the edge of the edge portion 11c of the sheet bundle 11, the proportional control electromagnetic valve 20 is controlled by a voltage corresponding to the pressing of the edge portion 11c obtained by calculation, and the edge of the top portion 11b of the sheet bundle 11 is controlled. Is cut, the proportional control electromagnetic valve 20 is controlled by a voltage corresponding to the pressing of the top portion 11b obtained by calculation, and the end of each sheet bundle 11 is pressed by the pressing force.
[0023]
The optimum cutting can be obtained by controlling the pressing force. In other words, the top and bottom of the stack of paper are different in length, so if you press the long edge with the pressing force of the short edge, the pressing force will be insufficient and the aligned edge will not be obtained. In addition, if the top part with a short dimension is pressed with the pressing force of the long edge part with a long dimension, the pressing force becomes excessive and the top part with the tightly aligned sheet bundle cannot be obtained, but the optimum cutting is obtained by controlling the pressing force. Be able to. Further, since this control is automatically performed, the cutting process can be performed at a high speed, and the operation for adjusting the pressing force at the cutting position is omitted, and the labor for the adjustment is reduced.
[0024]
When the cutting of the edge of the top portion 11b is completed and the rotary table 15 is rotated and the guide plate 15a returns to the original standby position, the chuck 14 fixed to the belt 14b reciprocatingly driven by the motor 14a is rotated. It moves toward the table 15, returns to the original position even when the cut sheet bundle 11 on the rotary table 15 is gripped, and discharges the sheet bundle 11 to the stacker 18.
[0025]
The above embodiment is an in-line case where the binding and cutting process using hot melt glue are consistently performed, and the stack raising mechanism 12 is installed in the carry-in portion. It can be omitted if necessary. The stack raising mechanism 12 can also be used in a cutting machine in which cutting units are arranged in a substantially U shape.
[0026]
【Effect of the invention】
As described above, according to the present invention, the top part, the ground part, and the fore edge part of the sheet bundle are cut by the rotary table for positioning and fixing the sheet bundle and the one cutting unit that moves close to and away from the rotary table. Therefore, the structure of the three-way cutting machine can be greatly simplified, and it is easy to handle and can be downsized.
[Brief description of the drawings]
FIG. 1 is a perspective view schematically showing an overall configuration of a turning-sheet cutting apparatus according to an embodiment of the present invention.
FIG. 2 is a plan view of the turning-sheet cutting apparatus shown in FIG.
FIG. 3 is a front view of the turning-sheet cutting apparatus shown in FIG.
FIG. 4 is an operation explanatory view of a stack raising mechanism of the turning sheet cutting apparatus shown in FIG. 1;
FIG. 5 is an operation explanatory view of a stack raising mechanism of the turning sheet cutting apparatus shown in FIG. 1;
6 is an explanatory diagram of a cutting operation of the turning-off sheet cutting apparatus shown in FIG. 1; FIG.
7 is an operation explanatory view of a presser plate of the turning-off sheet cutting device shown in FIG. 1. FIG.
FIG. 8 is an operation explanatory view of a presser plate of the turning-off sheet cutting apparatus shown in FIG. 1;
FIG. 9 is an explanatory diagram of a conventional three-way cutting machine.
[Explanation of symbols]
11 Sheet bundle 11a Back surface 11b Top part 11c Small edge part 11d Ground part 12 Stack raising mechanism 12a, 12d Lift motor 12b Paper bundle support piece 12c, 12f Chain 13 Push plate 13a Motor 13b Belt 14 Chuck 14a Motor 14b Belt 15 Rotary table 15a Guide Plate 16 Small-edge positioning guide plate 17 Cutting unit 17a Support plate 17b Cutting blade 17c Holding plate 17d Cutter cylinder 17e Presser plate 17f Pressure cylinder 17g Motor 17h Screw shaft 17i Receiving base 18 Stacker 19 Presser plate 20 Proportional control solenoid valve

Claims (2)

A rotary table for positioning and placing a sheet bundle; a transporter for transporting the sheet bundle to the rotary table; a transporter for transporting the sheet bundle placed on the rotary table to a discharge unit; a movable cutting blade; A cutting unit having a pressing plate, and each time the rotary table is rotated by a predetermined angle, the cutting unit is moved to an edge of a sheet bundle placed on the rotary table, and the rotary table is rotated. A sheet-cutting apparatus for turning-off paper, characterized in that the edge of the sheet bundle positioned by the step is cut by a cutting blade of the cutting unit. The transporting device that transports the sheet bundle to the rotary table has a stack raising mechanism that stacks and raises the glued and bound sheet bundle for each book in the order of loading , with the glued back side of the sheet bundle aligned and stacked. And a moving mechanism that pushes the stacked sheet bundle raised by the stack raising mechanism to move to the rotary table .

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