JPH0577397A - Plate winding rod drive for rotary printing press - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a plate winding rod drive device of a rotary printing press capable of controlling two types of rotation angles of a plate winding rod with one drive device. [Structure] A cam lever 28 is fixed to a plate winding rod 15 in which a plate spring 23 for holding a plate is press-fitted in a groove 15b. A fluid pressure cylinder 31 supported on the machine frame 2 and a lever 26 supported on the frame 2 side are connected by a link mechanism. The cam follower 29 pivotally attached to the lever 26 is brought into contact with the cam surfaces 28a and 28b of the cam lever 28, and the radii of curvature of these two continuous cam surfaces 28a and 28b are set to be different from each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary printing press, which drives a plate winding rod for holding both ends of a printing plate mounted on a plate cylinder in a winding hole on the outer periphery of the plate cylinder. It relates to the device.

[0002]

2. Description of the Related Art In various types of rotary printing presses, a winding rod hole having a circular cross section, a part of which opens on the peripheral surface of the plate cylinder, is provided in the outer peripheral portion of the plate cylinder so as to extend in the axial direction of the plate cylinder. A plate winding rod is fitted in the rod hole. When a printing plate (hereinafter referred to as a plate) is mounted on the peripheral surface of the plate cylinder, the plate edge is inserted into the holding portion of the plate winding rod and then the plate cylinder is rotated about one turn. The plate is wound around the peripheral surface of the plate cylinder, and the bottom end of the plate is held by the holding portion of the plate winding rod to rotate the plate winding rod while controlling the reverse rotation of the plate winding rod with a ratchet device. The method is adopted. When removing the plate mounted on the plate cylinder, the bottom end of the plate is released from the holding by the holding portion of the plate winding rod, and then the plate cylinder is rotated about 1 turn to rewind the plate,
A method is adopted in which the gripping edge of the plate is taken out from the holding portion of the plate winding rod.

[0003]

However, in such a conventional apparatus as described above, the rotation angle of the plate winding rod varies depending on whether the holding side of the plate is held by the plate winding rod or the trailing side of the plate is held. In the case of different types of devices, since two types of drive devices with different strokes are required, not only the manufacturing cost and maintenance cost increase, but also the space occupied by the device increases and the size of the entire machine increases. There is.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a plate winding rod drive device for a rotary printing press, in which the rotation angle of the plate winding rod can be controlled to two types by one drive device. It is an object.

[0005]

In order to achieve such an object, according to the present invention, a printing plate which is rotatably fitted in a winding rod hole in the outer peripheral portion of the plate cylinder and wound around the peripheral surface of the plate cylinder. A plate winding rod provided with a plate holding member for holding the gripping side end and the trailing side end, respectively, and a cam surface fixed to the shaft end of the plate winding rod and extending in the circumferential direction of the plate cylinder. A cam lever provided, a drive device supported on the machine frame side, and a lever that is connected to the drive device by a link mechanism and is swingably supported on the machine frame side near the cam lever. A pressing member pivotally attached to the lever and press-contacted to the cam surface of the cam lever is provided, and the cam surface is formed of two continuous arc surfaces having different radii of curvature.

[0006]

When the motor rotates with the old plate mounted, the plate cylinder rotates and the pressing member stops at a position corresponding to the center of the cam surface. Then, when the drive device is operated, the lever swings via the link mechanism, the pressing member rotates the cam lever, and the rear end of the old plate is released from being held by the plate winding rod. Next, hold the bottom edge of the printing plate by hand, rewind the plate cylinder about 1 turn to rewind the old plate, and when the plate cylinder stops, the drive device operates and the plate winding rod rotates. The removal of the old version is completed by releasing the holding side edge of the old version from holding.

After removing the old plate in this way, the gripper side end of the new plate is inserted into the plate holding portion of the plate winding rod instead, and the plate is driven by the driving device with the pressing member corresponding to the center of the cam surface. When the winding rod is rotated, the gripping side end of the new plate is held by the plate winding rod. When the plate cylinder is rotated forward, the new plate is wrapped around the peripheral surface of the plate cylinder, and then the plate cylinder stops.Therefore, insert the plate butt into the holding part of the plate winding rod and use the air cylinder to move the plate winding rod. When it is rotated, the plate butt is held by the plate winding rod, and the installation of the new plate is completed.

[0008]

1 to 18 show an example in which a plate winding rod drive device of a rotary printing machine according to the present invention is applied to a double-sided web rotary printing machine, FIG. 1 is a side view of a plate cylinder, and FIG. 2 is a plate. 6 is a partially cutaway front view of the body end portion, FIG. 3 is a partially broken exploded front view of the plate winding rod drive device, FIG. 4 is a side view of the plate winding rod drive device, FIG. 5 is a front view of the plate pressing portion, and FIG. Is a side view of the plate pressing portion, FIG. 7 is a cross-sectional view of the printing unit independent driving portion, FIG. 8 is a developed plan view of the printing unit independent driving portion, FIG. 9 is a schematic plan view of the printing unit, and FIG.
0 is a schematic front view of the printing unit, FIGS. 11 to 15 are front views of the vicinity of the plate winding rod for explaining the plate winding operation, and FIG.
18A to 18C are side views in the vicinity of the plate cylinder end portion for explaining the plate winding operation.

8 to 10, a blanket cylinder 4 of the upper printing device 3 is provided between the left and right frames 2 of the printing unit 1.
And the blanket cylinder 6 of the lower printing device 5 are axially mounted so as to be in contact with each other. The blanket cylinders 4 and 6 are respectively contacted with the plate cylinders 7 and 8 pivotally supported by the left and right frames 2. A printing plate (hereinafter referred to as a plate) is attached to the peripheral surface of each plate cylinder 7, 8 by a plate changing device. Since the lower printer 5 has almost the same configuration as the upper printer 3, only the upper printer 3 will be described below. A plurality of inking rollers 9 of an inking device shown in FIG. 6 are in contact with the surface of the plate mounted on the plate cylinder 7, and a swimsuit roller 10 of a water supply device is in contact with the surface of the plate. ing. Then, the image formed on the plate surface by the ink and water supplied to the plate surface by the inking device and the water supply device, of which only a part is shown, is transferred to the blanket cylinders 4 and 6 and travels in the direction indicated by the arrow in FIG. The web 11 is transferred and double-sided printed. Reference numeral 12 is a step which is supported between the adjacent printing units and in which an operator stands when the plate is changed or ink is changed.
3, 14 are rotations from the driving side, which are the blanket cylinders 4, 6 and the plate cylinder 7,
It is a body gear that is transmitted to 8 etc.

1 and 2, a disc-shaped bearer 7a is integrally formed on both ends of the plate cylinder 7, and a winding rod hole 7c is formed on the outer periphery of the bearer 7a and the cylinder body 7b. It is provided through the entire length of the body. A plate winding rod 15 having a perfect circular cross section, which is slightly longer than the body length, is rotatably fitted in the winding rod hole 7c. The plate winding rod 15 is mounted on the bearer 7 of the winding rod hole 7c.
The movement in the axial direction is regulated by bringing the stepped portion into contact with the bush 16 fitted in the a corresponding portion. A projecting portion 15a of the plate winding rod 15 toward the machine base operation side is formed in a hexagonal cross section, and a lever 17 is formed on the projecting portion 15a.
It is fixed by splitting it by fitting the square holes.

An L-shaped bracket 18 is bolted to the end face of the bearer 7a in the vicinity of the lever 17, and the forked portion formed at the free end of the lever 17 is attached. A spring shaft 19 with a collar is pivotally mounted by a pin 20 so as to be swingable, and this spring shaft 19 is slidably fitted in a hole formed in a spring receiver 21 and a bracket 18. .. 22 is a flange of the spring shaft 19 and a spring receiver 21.
A compression coil spring interposed between the lever 1 and
A rotating force in the counterclockwise direction in FIG. 1 is applied to the plate winding rod 15 via 7. Further, as shown in FIG. 11, the plate winding rod 15 has a groove 15b extending in the radial direction and opening to the peripheral surface.
Are provided over the entire length of the plate winding rod 15. Into the groove 15b, a plurality of leaf springs 23 having a small U-shape and used for winding the plate, which will be described later, are press-fitted. Therefore, the plate winding rod 15 is stopped in a state where the spring forces of the compression coil spring 22 and the leaf spring 23 are balanced. In addition,
A cut 7d corresponding to the winding rod hole 7c is provided on the peripheral surface of the plate cylinder 7 so as to open on the peripheral surface.

In FIGS. 3, 4 and 16 to 18, the plate cylinder 7 is axially supported by the frame 2 via a bearing 24, and a pin 25 with a collar has a threaded portion above the bearing 24. It is fixed by being screwed into the screw hole of No. 2, and a lever 26 formed in a dogleg shape is pivotally supported on the pin 25 so that the bush 27 prevents the lever 26 from coming off the pin 25. Has been done. A cam lever 28 is split and fixed to the projecting portion 15a of the plate winding rod 15,
A cam follower 29, which is a pressing member pivotally attached to the center of the lever 26, is in contact with the free end of the cam lever 28.

On the other hand, an air cylinder 31, which is a driving device, is swingably supported by a pin 30 implanted in the frame 2, and the working end of a piston rod 32 which moves forward and backward by the air pressure and the frame 3 are supported. One free end of the doglegged link 34 pivotally supported by the side stud 33 is connected by a link 35 pivotally attached at both ends. Further, the lever 26 and the other free end portion of the link 34 are connected by a link 36 pivotally attached at both ends by a pin, and a spring hook 37 provided at one end of the link 35 and a spring on the frame 2 side. Between the hook 38 and the tension coil spring 3 that applies a turning force for rotating the lever 26 to the position shown by the solid line in FIG.
Nine are stretched. In addition, this tension coil spring 3
9 is provided as a safety device for preventing the lever 26 from rotating to the position shown by the chain line in FIG. 35a is fixed to the frame 2 and is a link 35
Is an adjustable stopper that abuts against and limits the end of movement in the direction of the chain line.

In the present apparatus, as shown in FIG. 16, the cam surface of the cam lever 28 with which the cam follower 29 is in contact is the cam surface 2 having a large radius of curvature indicated by A in the figure.
8a and a cam surface 28b having a small radius of curvature indicated by reference numeral B in the drawing.
The cam surface 28b is used when the gripping side end portions 80a and 81a of the plates 80 and 81, which will be described later with reference to FIG. 11, are used, and the butt side end portion 80b of the plates 80 and 81 is formed. , 81b are taken in and out, the cam surface 28a is used.

In FIGS. 5 and 6, in the vicinity of the peripheral surface of the plate cylinder 7, a substantially rectangular sub-frame 41 supported by a plurality of posts 40 is provided inside the frames 2 on both sides. A lever 44, which is orthogonal to the piston rod 43 and extends in the axial direction of the blanket cylinder 4, is connected to the working end of the piston rod 43 of the air cylinder 42 fixed to the subframe 41. Reference numeral 45 denotes a slide shaft whose both ends are supported by a bracket 46 on the side of the subframe 41 and extends in a direction orthogonal to the lever 44. The lever 44 is slidably fitted to the slide shaft 45, and the piston is driven by air pressure. By moving the rod 43 back and forth, the lever 44
Is guided by the slide shaft 45 to move forward and backward in the perspective direction with respect to the peripheral surface of the plate cylinder 7. Bearings 47 are attached to the front ends of the levers 44 on both sides, and plate bearing rollers 48 extending in the axial direction of the plate cylinder 7 are rotatably supported on both ends of the bearings 47 on both sides. .. The plate pressing roller 48 is moved forward to be pressed against the plate surface on the plate cylinder 7.

Further, the air cylinder 42 is attached to the lever 44.
Another air cylinder 49 that moves forward and backward together with the lever 44 is fixed by making the axial direction parallel to the air cylinder 42, and the working end of the piston rod 50 that moves forward and backward by the air pressure of the air cylinder 49 is made of rubber or the like. A pad 51 formed of an elastic material and extending in the axial direction of the plate pressing roller 48 is provided supported by a bar 52. A free end of a lever 53, whose base is swingably mounted on the end shaft of the plate pressing roller 48, is mounted on the end shaft of the bar 52. When the piston rod 50 is moved forward, It is configured that the plate 53 swings around the end shaft of the plate pressing roller 48, and the pad 51 at the free end of the lever 53 circulates and is pressed against the plate bottom in the radial direction. That is, when the plate pressing roller 48 moves forward by the air cylinder 42 and is pressed against the plate surface, the piston rod 50 of the air cylinder 49 moves forward,
The pad 51 circulates and is pressed against the plate bottom portion, which is a portion of the plate cylinder 7 having a different phase in the circumferential direction from the pressing portion of the plate pressing roller 48.

The structure of the printing unit drive section will be described with reference to FIG. In the gear box 54 provided on the driving side of the printing unit, a line shaft 55 that is rotationally driven from the driving side and extends along the machine base, and an intermediate shaft 56 that is parallel to the line shaft 55 are drivingly connected by gears 57 and 58. An electromagnetic clutch 59 is connected between the gear 57 and the line shaft 55 and is connected or disconnected by a signal from a control device or a push button operation. The intermediate shaft 56 and a gear shaft 60 orthogonal to the intermediate shaft 56 are drivingly connected by bevel gears 61 and 62, and the gear shaft 60 and the blanket cylinder 4 are drivingly connected by gears 63 and 64.

Further, a single motor 65 is mounted on the gear box 54, and a clutch 66 for connecting and disconnecting the rotation transmission between the single motor 65 and the intermediate shaft 56 is provided on the intermediate shaft 56. That is, the intermediate shaft 56 is rotationally driven from the driving side by the electromagnetic clutch 59 being connected and the clutch 66 being disengaged during the printing operation, and when the plate is replaced, the electromagnetic clutch 59 is disengaged and the clutch 6 is released.
When 6 is connected, it is configured to be rotationally driven from the independent motor 65 side. In FIG. 8, a rotary encoder 67 is attached to the end shaft of the upper blanket cylinder 4 on the side opposite to the gear, and is configured to detect the stop position of the plate cylinder 7.

In FIG. 10, operation panels 70 and 71 are attached to the upper printing device 3 and the lower printing device 5, respectively, and fixed to the work space portion side of the frame 2. Is provided with push buttons for operating the above devices.

The operation of the printing plate changing device configured as described above will be described with reference to FIGS. 11 to 18 which are explanatory views of the plate winding operation. The plate spring 23 is press-fitted into the groove 15b of the plate winding rod 15, and the old plate 81 is mounted in the same state as the new plate 80 shown in FIGS. That is, the gripping side end portion 8 of the old plate 81 bent by a plate bending machine (not shown)
1a is inserted from the notch 7d of the plate cylinder 7 and is pressed and held on the wall surface by one end of the leaf spring 23. Further, the tail side end portion 81b of the old plate 81 bent substantially at a right angle by a plate bending machine.
Is held in a state where the bent end 81c is hooked on the other bent portion of the leaf spring 23.

In this way, with the old version installed,
After pressing the start button to bring the motor on the driving side to a safe state in which it does not rotate, and then pressing the unit set button, the driving electromagnetic clutch 59 of the upper printing device 3 of the selected printing unit 1 is disengaged, and the independent driving clutch. 66 is connected. When the single motor 65 rotates in this state, the plate cylinder 7 rotates to the position shown in FIG. 16 and stops. At this time, the cam follower 29 corresponds to the center of the cam surface of the cam lever 28.

When the operation button is pushed in this state, the air cylinder 31 is actuated and the cam follower 29 pivotally attached to the lever 26 moves the cam surface 2 of the cam lever 28 as shown in FIG.
8a is pressed and rotated to rotate the plate winding rod 15, and the bent portion of the leaf spring 23 releases the holding of the old plate 81 as shown in FIG. Goes out of the plate cylinder 7. Then, when the plate bottom is held by hand and the operation button is pressed, the plate cylinder 7 is reversed to rewind the old plate 81 and stop at the position shown in FIG.

Then, when the operation button is pushed, the air cylinder 31 is actuated and the cam follower 2 pivotally attached to the lever 26.
9 is a cam surface 28a of the cam lever 28 as shown in FIG.
12 is pressed to rotate the plate winding rod 15 to the position shown in FIG. 12 and stop it, the edge side of the old plate 81 is released from being held by the leaf spring 23, and this edge side goes out of the plate cylinder 7. Therefore, the removal of the old version 81 is completed.

In this state, when the holding edge of the new plate 80 is inserted into the groove of the plate cylinder 4 as shown in FIG. 12 and the operation button is pushed, the air cylinder 31 is actuated to pivot the lever 26. The attached cam follower 29 releases the cam lever 28 from the pressure, and the spring force of the compression coil spring 22 causes the plate winding rod 15 to rotate to the position shown in FIG. Held by 23. Then, when the operation button is pressed, the plate cylinder 7 rotates in the normal direction, the new plate 80 is wound around the peripheral surface of the plate cylinder 7, and the plate cylinder 7 stops at the position shown in FIG. At the time of winding the new plate 80 around the peripheral surface of the plate cylinder 7, the air cylinder 42 operates to operate the piston rod 43.
Moves forward and the lever 44 moves along with the pad 51 to slide the slide shaft 4
5 is moved by being guided by the plate pressing roller 48.
Is pressed against the surface of the new plate 80, and the new plate is wound in this state, so that the new plate 80 is wound in a state of being in close contact with the body circumferential surface.

When the plate cylinder 7 stops rotating, the air cylinder 49 operates and the piston rod 50 moves forward, whereby the lever 53 swings around the end shaft of the plate pressing roller 48 and its free end portion. Since the pad 51 fixed to the circulates and is pressed against the bent side of the new plate 80 from the radial direction,
The plate edge bent portion of the new plate 80 is inserted into the opening end of the leaf spring 23. At this time, the plate cylinder 15 is rotated by the air cylinder 42 to the position shown in FIG.
b is held with the bent end 80c hooked on the bent portion of the leaf spring 23, and the mounting of the new plate 80 is completed. After that, the plate exchange of the lower printing device 5 and the plate exchange of other printing units are performed by the same operation as described above.

[0026]

As is apparent from the above description, according to the present invention, in the plate changing device of the rotary printing machine, the plate is attached to the winding rod hole of the outer peripheral portion of the plate cylinder so as to be rotatable and attached to the peripheral surface of the plate cylinder. A plate winding rod equipped with a plate holding member for holding the gripping side end and the trailing side end of the wound printing plate, and the plate winding rod fixed to the axial end of the plate winding rod in the circumferential direction of the plate cylinder. A cam lever with an extending cam surface,
A drive device supported on the machine base frame side, a lever that is connected to the drive device by a link mechanism and is swingably supported on the machine base frame side in the vicinity of the cam lever, and is pivotally attached to this lever. By providing a pressing member that is pressed against the cam surface of the cam lever, and by forming the cam surface with two arc surfaces that are continuous with different radii of curvature,
Since two different types of rotation angles of the plate winding rod can be controlled by one driving device, the manufacturing cost and the maintenance cost can be reduced, the space occupied by the device can be reduced, and the size of the entire machine can be reduced.

[Brief description of drawings]

FIG. 1 is a side view of a plate cylinder.

FIG. 2 is a partially cutaway front view of a plate cylinder end portion.

FIG. 3 is a partially cutaway exploded front view of a plate winding drive unit.

FIG. 4 is a side view of a plate winding drive unit.

FIG. 5 is a front view of a plate pressing portion.

FIG. 6 is a side view of a plate pressing portion.

FIG. 7 is a partially cutaway plan view of a printing unit independent drive unit.

FIG. 8 is a developed plan view of a printing unit independent drive unit.

FIG. 9 is a schematic plan view of a printing unit.

FIG. 10 is a schematic front view of a printing unit.

FIG. 11 is a front view of the vicinity of the plate winding rod shown for explaining the plate winding operation.

FIG. 12 is a front view of the vicinity of the plate winding rod shown for explaining the plate winding operation.

FIG. 13 is a front view of the vicinity of a plate winding rod shown for explaining the plate winding operation.

FIG. 14 is a front view of the vicinity of a plate winding rod shown for explaining the plate winding operation.

FIG. 15 is a front view of the vicinity of the plate winding rod shown for explaining the plate winding operation.

FIG. 16 is a side view of the vicinity of a plate cylinder end portion for explaining the plate winding operation.

FIG. 17 is a side view in the vicinity of a plate cylinder end portion for explaining the plate winding operation.

FIG. 18 is a side view in the vicinity of a plate cylinder end portion for explaining the plate winding operation.

[Explanation of symbols]

 1 printing unit 7 plate cylinder 7a winding rod hole 8 plate cylinder 15 wire winding rod 15b groove 17 lever 23 leaf spring 28 cam lever 29 cam follower 31 air cylinder 32 piston rod 34 link 35 link 36 link 80 new edition 81 old edition

Claims (1)

[Claims] 1. A printing plate that rotatably fits in a winding rod hole on the outer periphery of the plate cylinder and holds the grip-side end and the tail-side end of the plate wound around the peripheral surface of the plate cylinder. A plate winding rod provided with a holding member, a cam lever having a cam surface fixed to the axial end of the plate winding rod and extending in the circumferential direction of the plate cylinder, a drive device supported on the machine frame side, A lever that is connected to a drive unit by a link mechanism and is swingably supported on the machine frame side in the vicinity of the cam lever, and a pressing member that is pivotally attached to the lever and is pressed against the cam surface of the cam lever. And the cam surface is formed by two continuous arc surfaces having different radii of curvature, and a plate winding rod drive device of a rotary printing press.