JPH0592543A - Slitter device for sheet-fed press - Google Patents

Abstract

PURPOSE:To cut smoothly and securely a printed matter, improve the life of a cutter and enhance the machine operating efficiency by forming an cutting edge of cutter by means of a double-edge cutter provided with sharp vertical angle, rotation driving forcibly the printed matter in the direction reverse to the feeding direction by a motor and pressing the printed matter in the vicinity of the cutter by a roller. CONSTITUTION:The position of a cutter to a device main body 11 is fixed, and then the device main body 11 is installed on the fixing side of a machine and the relative position of a double-edge cutter 3 of a cutter 2 and a printed matter 4 is fixed. Simultaneously the pressing force of a press roller 28 is adjusted. The double-edge cutter 3 of the cutter 2 is conformed to the position facing a recessed channel of a take-off cylinder for feeding the printed matter 4, and the cutter 2 is rotated in the direction reverse to the feeding direction of the printed matter 4 by a motor 10. When the printed matter 4 is moved, cutting is carried out by the double-edge cutter 3 of the cutter 2 being in contact with the printed matter 4. On the other hand, the cutter 2 is pressed to the printed matter 4 at all times by the proper pressing force by elastically supporting the cutter 2 on the device main body side to carry out securer cutting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slitter device for a sheet-fed printing press, which is suitable for cutting printed matter printed by a sheet-fed press to a predetermined size.

[0002]

2. Description of the Related Art FIG. 10 shows an outline of an offset sheet-fed printing press as an example of a sheet-fed printing press to which the present invention is applied. As shown in the figure, the offset sheet-fed printing press has a paper feeding section 53,
The printing unit 55 includes a plurality of printing units 54, a paper discharge unit 56, and the like. Base paper 5 stacked on the paper feed section 53
7 is sent to the printing unit 55 via the conveyor 58 and the like, passes through each printing unit 54 having the plate cylinder 59, the blanket cylinder 60, the impression cylinder 61, the double cylinder 62, etc., and becomes the printed matter 4, and the paper discharge unit 56 side is provided. The sheet is sent to the first sheet discharge cylinder 63. The printed matter 4 is sent to the conveyor 65 via the second discharge cylinder 64 that is in contact with the first discharge cylinder 63, and is sequentially stacked on the base plate 66 of the discharge unit 56. Some printed matter 4 is provided on the left and right sides, and such a matter may be slit by the slitter device 1 attached to the printing machine. Slitter device 1
10 is disposed, for example, at a position in contact with the second paper discharge cylinder 64, as shown in FIG.

FIG. 11 shows a slitter device 1b as an example of a conventional slitter device of a sheet-fed printing press. In the figure, reference numeral 15 indicates a support rod that is fixed to the fixed side of the machine, and 70 indicates a block body fixed to the support rod 15. In the slitter device 1b, the cutter 67, the pressing rollers 73, 74, etc. are elastically supported on the block body 70 side. That is, the cutter shaft 68 that pivotally supports the cutter 67 is supported by the arm member 69 that is rotatably cantilevered by the support rod 15, and the connecting bracket 71 fixed to the arm member 69 is connected via the spring 72. The cutter 67 is elastically supported on the block body 70 side by being elastically supported on the block body 70 side. Further, the pressing rollers 73 and 74 are elastically supported on the block body 70 side through the springs 75 and 76 and the like. The pressing rollers 73 and 74 are the cutter 67.
It is arranged before and after. The printed matter 4 is a pressing roller 73,
It is sent in the direction of arrow E while being pressed by 74, and the cutter 6
It is cut by 7. FIG. 12 shows details of the cutting by the cutter 67. The cutter 67 has a one-sided cutting edge 79 that is inclined on one side, and is arranged at a position where it abuts on a side wall (a left side wall in the drawing) of the concave groove 9 on the side of the second discharge cylinder 64. Further, friction rings 77 and 78 made of O-rings and the like are arranged coaxially with the cutter 67. When the printed material 4 is fed in the E direction (FIG. 11), the friction rings 77 and 78 pressed against it are rotated, and the cutter 67 is rotated accordingly. Further, the cutter 67 is pressed toward the printed matter 4 side by the spring 72 and the like, and as described above, the concave groove 9 is formed.
The printed matter 4 is placed in contact with the wall of the
It is cut by the shearing force between the one-side cutting edge 79 and the wall of the groove 9 and the rotation of the cutter 67 by the friction rings 77 and 78.

[0004]

As described above, the printed matter 4 can be cut by the conventional slitter device 1b, but there are the following problems. The printed matter 4 is the second output cylinder 64.
Since the printed matter 4 is not sufficiently dried at the stage of contact with the printed matter, the printed matter 4 cannot be strongly pressed against the side of the second discharge cylinder 64. Therefore, the printed matter 4 is sent in a state of being easily lifted. As described above, the conventional slitter device 1
Reference numeral b denotes the one for cutting the printed matter 4 by the shearing force between the one-sided cutting edge 79 and the wall of the concave groove 9 and the rotation of the cutter 67 by the friction rings 77, 78. In some cases, the cutter 67 tends to separate from the wall of the groove 9 and loses the shearing force due to insufficient rotation. Therefore, it becomes necessary to hold down the cutter 67 manually. Also, the cutter 6
Since 7 is wobbled in the axial direction, there is a problem that the cutting line meanders even when the printed matter 4 is cut. Furthermore, the cutter 6
In No. 7, the sharpness is likely to deteriorate due to repeated shearing, and the cutter replacement frequency is relatively high. However, to replace the cutter 67, the entire machine must be stopped. for that reason,
There is also a problem that the machine operating rate decreases.

The present invention solves the above-mentioned problems. Sheet-fed printing capable of accurate and reliable cutting, no wobbling of cutting lines, improved cutter life, and improved machine operating rate. It is an object to provide a slitter device for a machine.

[0006]

In order to achieve the above-mentioned object, the present invention is a slitter device attached to a sheet-fed printing press, which comprises a cutter having triangular and sharp cutting edges, and A motor for rotating the cutter in the direction opposite to the feeding direction of the printed matter, a pressing roller arranged in the vicinity of the cutter for press-contacting and engaging with the printed matter, and holding the pressing roller, the motor and the cutter, and predetermining the printed matter. A slitter device for a sheet-fed printing press, which comprises a device main body supported on the fixed side of the printing machine so as to be movable to a position, and further, a slitter device for a sheet-fed printing press elastically supporting the cutter on the apparatus main body side. It is what constitutes.

[0007]

After the position of the cutter with respect to the main body of the machine is determined, the main body of the machine is attached to the fixed side of the machine to determine the relative position between the two cutting edges of the cutter and the printed matter. At the same time, the pressing force of the pressing roller is adjusted. Both cutting blades of the cutter are aligned at positions facing the concave groove of the sheet discharge cylinder for sending the printed matter, and the cutter is rotated in the direction opposite to the feeding direction of the printed matter by the motor. When the printed matter moves, the cutting is performed by the cutting blades of the cutter that are in pressure contact with the printed matter. On the other hand, by elastically supporting the cutter on the apparatus main body side, the cutter is constantly pressed against the printed matter with an appropriate pressing force, and more reliable cutting is performed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the entire structure of a slitter device 1 of this embodiment, and FIGS. 2 and 3 are a front view and a top view thereof. Further, FIG. 4 is a perspective view showing a mounting state of the slitter device 1 on the fixed side of the machine, and FIG. 5 is a front view showing a shape of the cutter 2 and an engagement state with the printed material 4. The slitter device 1 includes a device body 11 and an induction motor 1.
0 is the main component. The device main body 11 includes an elongated support rod 15, a block body 16 fixed to the support rod 15, an upper plate 12 fixed to the upper surface of the block body 16, and the support rod 15 as shown in FIG. It is composed of a support rod holding mechanism portion 18 and the like that is movably fixed to the fixed side 17. The induction motor 10 is mounted on the upper plate 12 of the apparatus body 11.

A base end portion of an arm member 19 is rotatably cantilevered on one surface side of the block body 16 of the apparatus main body 11, and a rotary shaft 7 of the cutter 2 is pivotally supported at a tip end portion of the arm member 19. ing. As shown in FIG. 5, the rotary shaft 7 has a V
The pulley 2 is fixed, and the cutter 2 integrally sandwiched between the bosses 5 and 6 is attached. V pulley 8
Is connected to a V-pulley 13 fixed to a rotation shaft of the induction motor 10 via a V-belt 14, and the cutter 2 is rotated by driving the induction motor 10. A screw rod 2 is provided in the middle of the arm member 19.
The connecting block 21 having 0 is pin-coupled and the threaded rod 2
0 penetrates the upper plate 12 and is fixed by a lock screw 22, and a spring 23 is provided between the upper surface of the coupling block 21 and the lower surface of the upper plate 12.

The cutter 2 has an outer diameter d _{1 as} shown in FIG.
2 is formed of a circular thin plate, and is formed on the outer periphery with two triangular cutting edges 3 having an acute apex angle θ of both sides inclined. In this embodiment, the apex angle θ is formed at 30 °. Further, the outer diameter d ₂ of the bosses 5 and 6 is formed to be smaller than the outer diameter d _{1 of the} cutter ₂ by at least the amount of both cutting edges 3, and the length a of both cutting edges 3 of the cutter 2 is shown in FIG. As shown, it is formed to be at least thicker than the thickness t of the printed matter 4 that is in contact with the second discharge cylinder 64 having the concave groove 9. It should be noted that when both cutting edges 3 face the inside of the groove 9 and penetrate the printed matter 4, the gap b between the surface of the printed matter 4 and the outer periphery of the boss portion 5 (6) is maintained at a relatively small gap. Is desirable.

On the other hand, the base end portion of the arm member 24 is rotatably cantilevered on the other surface side of the block body 16, and a connecting block 26 having a screw rod 25 is provided at the tip end portion of the arm member 24 with a pin 27. And a pressing roller 28 is pivotally supported at the end of the pin 27. The pressing roller 28 is disposed on substantially the same plane as the rotating surface of the cutter 2, and its outer peripheral surface presses and engages the printed matter 4. Also,
The screw rod 25 penetrates the upper plate 12 and is fixed by a lock screw, and a spring 29 is provided between the upper surface of the coupling block 26 and the lower surface of the upper plate 12, so that the pressing roller 28 is attached to the block body 16. It is elastically supported.

Next, the support rod holding mechanism portion 18 of the apparatus main body 11 will be described with reference to FIG. On the fixed side 17 of the machine near the second paper discharge cylinder 64, a bracket 31 forming a long groove 30 having a groove width into which the support rod 15 can be fitted, and the support rod 15
A bracket 33 having a through hole 32 for supporting is fixed. After the support rod 15 is engaged with the long groove 30 of the bracket 31 and the through hole 32 of the bracket 33 to adjust the support rod 15 to a predetermined position, it is fixed to the bracket 31, 33 side with the lock screws 34, 35. By slitter device 1
Is fixed to the fixed side 17.

Next, the cutting action of the printed matter 4 by the slitter device 1 will be described. While the spring 23 is expanded and contracted, the screwing position of the screw rod 20 of the connecting block 21 and the lock screw 22 is adjusted, and the tension of the V belt 14 between the induction motor 10 and the cutter 2 is adjusted. Device body 11
The support rod 15 of the cutter 2 is connected to the support rod holding mechanism portion 18 as described above, and the cutter 2 is rotated while the support rod 15 is rotated and moved left and right.
Adjust so that the cutting edge 3 comes to the position shown in FIG. That is, both cutting edges 3 can come into contact with the printed matter 4 and come to a position facing the concave groove 9 of the second paper discharge cylinder 64. Note that, as shown in FIG. 6, it is desirable that the center A of the cutter 2 and the center B of the second paper discharge cylinder 64 be adjusted so that the cutter 2 comes rearward by a distance m. Next, the pressing roller 2
The screwing position of the screw rod 25 of the connecting block 26 is adjusted so that 8 comes to the position where it comes into contact with the printed matter 4. Spring 2
Reference numeral 9 functions to press the pressing roller 28 against the printed material 4. When the induction motor 10 is driven, the V pulley 1
3, the cutter 2 rotates in the D direction (FIG. 6) opposite to the rotation direction of the second paper discharge cylinder 64 (C direction in FIG. 6) via the V belt 14 and the V pulley 8. The cutter 2 itself has a rotational force, both cutting edges 3 are formed with an acute angle of 30 °, and as shown in FIG. 6, the center A of the cutter 2 is the second discharge cylinder 6
The printed matter 4 is cut smoothly because it is arranged slightly rearward of the center B of the printed matter 4. In this case, the lifting of the printed matter 4 is suppressed by the boss portions 5 and 6 arranged through the small gap and is pressed by the pressing roller 28, so that the printed matter 4 is reliably cut. As shown in FIG. 4, the cut printed matter 4 is gripped by the gripper 81 connected to the chain 80 of the conveyor, and is sent to the paper discharge unit 56 side as the chain 80 moves.

Next, another embodiment of the present invention will be described with reference to FIGS.
Will be explained. This embodiment is characterized in that the cutter 2 is elastically supported, and the other detailed structures are not so different from the above-mentioned embodiment, so that they will be briefly described. Rotating shaft 7 of cutter 2
Reference character a (FIGS. 8 and 9) is directly connected to the rotation shaft of the induction motor 10a. Induction motor 10a
Is supported by a support case 36, and a hinge bracket 37 of the support case 36 is connected via a pin 38 to an adjusting rod 39 having a threaded portion. The device body 11a
The adjusting rod 39 is slidably supported by the guide bush 41 of the frame body 40. A spring 43 is provided between the lower surface of the lock nut 42 screwed to the threaded portion of the adjusting rod 39 and the upper surface of the frame body 40, and a spring 44 is provided between the lower surface of the frame body 40 and the upper surface of the hinge bracket 37. Is installed. With the above structure, the induction motor 10
The a and the cutter 2 are vertically movably hung on the apparatus main body 11a side via the springs 43 and 44. That is, the cutter 2 is elastically supported along the direction of approaching or separating from the printed material 4. Guide rods 45 and 46 are installed between the support case 36 and the frame body 40 in order to eliminate wobbling when the induction motor 10a moves up and down. Also, the frame body 4
A connecting bracket 48 and a pressing roller 49 are connected to the front end of an arm member 47 whose cantilevered base end is supported at 0. Threaded rod 5 of connecting bracket 48
0 penetrates the frame 40 and is fixed by the lock screw 51. A spring 52 is provided between the connecting bracket 48 and the frame 40 to adjust the pressing force of the pressing roller 49. The support rod 15 is fixed to the frame body 40. Support rod 1
5 is a support rod holding mechanism portion 18 (FIG. 4) as in the above embodiment.
Connected to.

In the slitter device 1a of the embodiment shown in FIGS. 7 to 9, since the cutter 2 is elastically supported on the device main body 11a side as described above, the printed matter 4 is constantly pressed against the printed matter 4 with an appropriate pressing force. Even if there is a slight lifting, it can follow smoothly, and more reliable cutting can be performed.

In the above embodiment, the rotation speed of the cutter 2 is not limited, but as an experimental example, the second discharge cylinder 64 is used.
The peripheral speed is set to be approximately equal to the peripheral speed of, but is not limited thereto. The apex angle θ of both cutting edges 3 of the cutter 2 is also 30 °, but is not limited thereto. Further, the connection structure between the cutter 2 and the induction motors 10 and 10a is not limited to that of the embodiment, and the structure of the support rod holding mechanism portion 18 that movably supports the support rod 15 is also limited to that of the embodiment. Not.

[0017]

According to the present invention, the following remarkable effects are exhibited. (1) The cutting edge of the cutter is formed by both cutting edges having an acute apex angle, and the motor is forcibly rotationally driven in the direction opposite to the feeding direction of the printed matter, and the printed matter in the vicinity of the cutter is pressed by the pressing roller. Since the pressing is performed, the printed matter can be cut smoothly and surely. (2) Since the sharpness of the cutter is improved, the life of the cutter is improved and the machine operating rate is improved. (3) The cutting accuracy is improved by improving the sharpness of the cutter, and the feeding speed of the printing press can be increased accordingly, and the productivity can be improved. (4) Since the cutter is connected to the motor and the motor is held on the apparatus main body side, movement of the cutter in the axial direction is suppressed, and the sharpness of the cutter is improved so that the cutting line does not meander.
Accurate split cutting is done. (5) Since the cutter and the induction motor connected thereto are elastically supported on the apparatus main body side, even if the engagement state between the printed matter and the cutter changes, the cutter constantly presses and engages the printed matter, which ensures a more reliable operation. It can be cut.

[Brief description of drawings]

FIG. 1 is a perspective view showing the overall structure of an embodiment of the present invention.

FIG. 2 is a front view of the embodiment.

FIG. 3 is a top view of the embodiment.

FIG. 4 is a perspective view showing a connected state of the machine of the embodiment to a fixed side.

FIG. 5 is a partial front view showing the shape around the cutter of the embodiment.

FIG. 6 is a partial side view for explaining the engagement state between the cutter and the second sheet discharge cylinder of the embodiment.

FIG. 7 is a perspective view showing the overall structure of another embodiment of the present invention.

FIG. 8 is a front view of the embodiment.

FIG. 9 is a top view of the same example.

FIG. 10 is a side view showing a schematic structure of an example of a sheet-fed printing press to which the present invention is applied.

FIG. 11 is a perspective view showing the overall structure of a conventional slitter device.

FIG. 12 is a partial front view for explaining the cutting action of the conventional slitter device.

[Explanation of symbols]

 1 Slitting Device 1a Slittering Device 2 Cutter 3 Double Cutting Blades 4 Printed Material 5 Boss 6 Boss 7 Rotating Shaft 7a Rotating Shaft 8 V Pulley 9 Groove 10 Induction Motor 10a Induction Motor 11 Device Main Body 11a Device Main Body 12 Upper Plate 13 V Pulley 14 V-belt 15 Support rod 16 Block body 17 Fixed side 18 Support rod holding mechanism 19 Arm member 20 Screw rod 21 Connecting block 22 Lock screw 23 Spring 24 Arm member 25 Screw rod 26 Connecting block 27 Pin 28 Pressing roller 29 Spring 30 Length Groove 31 Bracket 32 Through hole 33 Bracket 34 Lock screw 35 Lock screw 36 Support case 37 Hinge bracket 38 Pin 39 Adjustment rod 40 Frame 41 Guide bush 42 Lock nut 43 Spring 44 spring 45 guide rod 46 guide rod 47 the arm member 48 connecting bracket 49 press roller 50 threaded rod 51 locking screw 52 spring

Claims (2)

[Claims] 1. A slitter device to be attached to a sheet-fed printing press, comprising a cutter having triangular and sharp-edged cutting edges, a motor for rotating the cutter in a direction opposite to a feed direction of a printed matter, and the cutter. A pressing roller which is disposed in the vicinity of the pressing roller and presses and engages with the printed matter, and an apparatus main body which holds the pressing roller, the motor and the cutter and is movably supported at a predetermined position of the printed matter on a fixed side of the printing machine. A slitter device for a sheet-fed printing press. 2. The slitter device for a sheet-fed printing press according to claim 1, wherein the cutter is elastically supported in a direction of approaching or separating from the printed matter.