JP4979009B2 - Printer drive - Google Patents

Description

  The present invention relates to a driving device for a printing press that stops a cylinder at a predetermined position by driving a prime mover.

  For example, in a printing press equipped with an automatic plate changer, the end of the plate end and the end of the plate end are inserted into the plate vise of the plate cylinder, or the plate is added by operating the plate vise. In order to do this, it is necessary to accurately stop the plate cylinder at a predetermined position. For this reason, the normal printing press is provided with an auxiliary driving motor only for the purpose of obtaining stop accuracy in addition to the driving motor for operating the machine.

For example, this type of device includes a V pulley and a driven gear attached to the end shaft of the impression cylinder, a prime mover that rotationally drives the V pulley via a belt, an auxiliary prime motor that rotationally drives the driven gear, Some include a clutch device that transmits and does not transmit the rotation of the auxiliary driving motor to the driven gear (see Patent Document 1). In such a configuration, when the plate cylinder is stopped at a fixed position when changing the plate, the driving force of the auxiliary driving motor is transmitted to the driven gear by the clutch device, and the plate cylinder is stopped at the fixed position by the auxiliary driving motor. I am letting.
Utility Model Registration No. 2515387

  In the drive device of the conventional printing press described above, a dedicated auxiliary driving motor and a clutch device for stopping the plate cylinder in a fixed position are required, so that not only the number of parts increases but also the structure becomes complicated, There was a problem that the manufacturing cost also increased. In addition, the auxiliary driving motor requires a space for installing the clutch device, and there is a problem that the whole is enlarged.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to simplify the structure without increasing the number of parts, reduce the manufacturing cost, and reduce the installation space. A drive device is provided.

  In order to achieve this object, the present invention provides a first cylinder driven by a prime mover, and a second cylinder coupled to the first cylinder via a mutual gear and rotatably supported via an eccentric bearing. A third cylinder coupled to the second cylinder via gears of the second cylinder, and the first cylinder and the third cylinder by rotating the eccentric bearing. 2. A printing press comprising: a cylinder attaching / detaching device for inserting and removing a cylinder of 2; a cylinder stop position detecting device for detecting a stop position of the third cylinder; and a braking device for braking the first cylinder. The driving apparatus includes a control device that drives the cylinder attaching / detaching device based on a detection value detected by the cylinder stop position detecting device in a state where the prime mover is stopped and the braking device is operated.

  In the present invention according to the present invention, the prime mover includes the braking device.

  According to the present invention, since the cylinder can be stopped at a fixed position by the existing cylinder attaching / detaching device, a dedicated auxiliary driving motor and a clutch device for stopping the cylinder at a fixed position as in the prior art are unnecessary. Therefore, the structure can be simplified without increasing the number of parts, and the manufacturing cost can be reduced. Further, since an installation space for an auxiliary driving motor or the like is not required, the entire printing press can be reduced in size.

  Further, according to one of the inventions, since the prime mover includes a braking device, it is not necessary to provide a dedicated braking device in the device, so the number of parts can be reduced and the structure is simplified. can do.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing an outline of a driving device for a printing press according to the present invention, FIG. 2 is a side view of the cylinder attaching / detaching device, and FIG. 3 is an axis of a rubber cylinder by rotating an eccentric bearing. FIG. 4 is a block diagram showing the same configuration, and FIG. 5 is a schematic side view showing the same for rotating and positioning the plate cylinder to a fixed position by the cylinder attaching / detaching device. It is.

  In FIG. 1, reference numeral 1 denotes a driving motor that is a driving motor that drives the entire printing press, and includes a brake that is a braking device, and is drivingly connected to a V pulley 3 via a belt 2. The small gear 4 provided integrally with the V pulley 3 meshes with an impression cylinder gear 5a (see FIG. 5) attached to an end shaft of an impression cylinder 5 as a first cylinder. Reference numeral 6 denotes a rubber cylinder as a second cylinder facing the impression cylinder 5. As shown in FIG. 5, a rubber cylinder gear 6a attached to the end shaft meshes with the impression cylinder gear 5a.

  Reference numeral 7 denotes a plate cylinder as a third cylinder facing the rubber cylinder 6, and a plate cylinder gear 7a attached to the end shaft meshes with the rubber cylinder gear 6a. A gear 8 meshes with the impression cylinder gear 5a, and the rotation of the plate cylinder 7 is transmitted through the rubber drum gear 6a. The gear 9 meshes with the gear 9, and the gear 9 meshes with the gear 10. A stop position sensor 11 detects the stop position of the plate cylinder 7 by detecting the rotation position of the gear 10.

  Next, with reference to FIGS. 2 and 3, a cylinder attaching / detaching apparatus 12 for inserting and removing the rubber cylinder 6 from the impression cylinder 5 and the plate cylinder 7 will be described. In FIG. 2, both end shafts of the impression cylinder 5 and the plate cylinder 7 are rotatably supported by a frame 13 via a bearing (not shown). Further, both end shafts 6 b of the rubber cylinder 6 are rotatably supported by eccentric bearings 14 provided on the left and right frames 13.

  A bracket 17 is supported on a stud 16 projecting outward from the frame 13 on one side in the vicinity of the end shaft of the impression cylinder 5, and a stepping motor 18 serving as a cylinder insertion motor is supported on the bracket 17. The drive rod 19 is pivotally mounted upright. By driving the stepping motor 18 and rotating the nut 18a, the drive rod 19 having a screw portion screwed into the nut 18a is configured to advance and retreat up and down. A connecting lever 21 formed in an L shape when viewed from the front is pivotally attached to the protruding portion of the lever shaft 20 positioned above the drive rod 19 and supported at both ends by the left and right frames 13.

  The eccentric bearing 14 includes an outer ring fitted to the housing through needle rollers and an inner ring (fitted to the outer ring) rotatably connected to the housing through a tapered roller. (Not shown). The bearing lever 22 fixed to the outer ring of the eccentric bearing 14 and the connecting lever 21 are connected by a rod 23. Therefore, by driving the stepping motor 18 and moving the drive rod 19 forward and backward, the eccentric bearing 14 rotates clockwise and counterclockwise in the figure via the connecting lever 21, rod 23 and bearing lever 22. Putting and unrolling is done.

  In FIG. 3, the shaft core B on the inner peripheral surface of the inner ring constituting the eccentric bearing 14 and the shaft core F on the outer peripheral surface of the outer ring of the eccentric bearing 41 are eccentric from each other by a predetermined dimension. That is, when the rod 19 of the stepping motor 18 is advanced from the state in which the rubber cylinder 6 is inserted, the eccentric bearing 14 is rotated in the clockwise direction in the figure, and the axial center B of the inner ring inner peripheral surface is aligned with the outer ring outer peripheral surface. It moves to B1 around the axis F.

  As a result, the center-to-core distance between the axis P of the plate cylinder 7 and the axis B1 of the rubber cylinder 3 is increased, and a gap S1 is formed between the plate cylinder 7 and the rubber cylinder 6. Similarly, the rubber cylinder 6 The center-to-core distance between the shaft core B1 and the shaft core I of the impression cylinder 5 also increases, and a gap S2 is formed between the rubber cylinder 6 and the impression cylinder 5, resulting in a cylinder-extracted state. When resuming the printing operation, the rod 19 of the stepping motor 18 is moved backward to rotate the eccentric bearing 14 in the counterclockwise direction in the figure, so that the axis B1 of the rubber cylinder 3 is the axis F of the eccentric bearing 8. 3 is turned counterclockwise in FIG. 3 to narrow the gaps S1 and S2 to enter a cylinder-inserted state.

  In FIG. 4, a plate cylinder position adjustment button 24 is turned on when the plate cylinder 7 is positioned at a fixed position. Reference numeral 25 denotes a control device that turns on the plate cylinder position adjustment button 24 to activate the brake of the driving motor 1 and adjusts the amount of deviation between the stop position and the fixed position of the plate cylinder 7 detected by the stop position sensor 11. Based on this, the drive amount of the stepping motor 18 is determined, and control is performed so that the drive amount is driven.

  With this configuration, when the plate cylinder 7 is positioned at a fixed position with the driving of the driving motor 1 stopped and braked, the plate cylinder position adjustment button 24 is turned ON. In the control device 25, the brake of the driving motor 1 is operated, the drive amount of the stepping motor 18 is determined based on the deviation amount between the stop position and the fixed position of the plate cylinder 7 detected by the stop position sensor 11, and only the drive amount is determined. Control to drive.

  That is, in FIG. 5, when the plate cylinder 7 is slightly shifted counterclockwise from the fixed position in the drawing, the control device 25 moves the rod 19 of the stepping motor 18 backward. By retracting the rod 19, the connecting lever 21 rotates clockwise around the lever shaft 20 as indicated by the solid line. By this rotation, the eccentric bearing 14 is rotated counterclockwise in the figure via the rod 23 and the bearing lever 22, and the rubber cylinder 6 is a position indicated by the solid line from the position indicated by the two-dot chain line in FIG. Then, it moves slightly around the impression cylinder 5 in the counterclockwise direction.

  At this time, since the rotation of the impression cylinder gear 5a is restricted by operating the brake of the driving motor 1 and applying the brake, the rubber cylinder gear 6a meshing with the impression cylinder gear 5a is placed on the impression cylinder gear 5a. Rolls counterclockwise slightly. For this reason, since the rubber cylinder gear 6a is slightly rotated counterclockwise, the plate cylinder gear 7a meshing with the rubber cylinder gear 6a is slightly rotated clockwise, so that the plate cylinder 7 is positioned at a fixed position. It will be. That is, the plate cylinder gear 7a is rotated to a desired position by rotating the rubber cylinder gear 6a with the impression cylinder gear 5a stopped in a braked state as a fulcrum.

  Thus, since the plate cylinder 7 can be rotated to a fixed position and stopped by the existing cylinder attaching / detaching device 14, a dedicated auxiliary driving motor or clutch for stopping the plate cylinder 7 at a fixed position as in the prior art. No equipment is required. Therefore, the structure can be simplified without increasing the number of parts, and the manufacturing cost can be reduced. Further, since the drive motor 1 is provided with a brake, it is not necessary to provide a dedicated braking device in the device, so that the number of parts can be reduced and the structure can be simplified.

  Further, since the stepping motor is used to drive the cylinder attaching / detaching device, the position of the plate cylinder 7 can be finely adjusted. Further, by using the stepping motor, it is possible to position the rubber cylinder 6 in the direction approaching the plate cylinder 7 from the cylinder-extracted state and in the direction farther from the plate cylinder 7 than in the cylinder-extracted state.

  On the other hand, in FIG. 5, when the plate cylinder 7 is slightly shifted in the clockwise direction in the drawing from the fixed position, the control device 25 advances the rod 19 of the stepping motor 18. By moving the rod 19 forward, the connecting lever 21 rotates counterclockwise around the lever shaft 20 as indicated by a two-dot chain line. By this rotation, the eccentric bearing 14 is rotated clockwise through the rod 23 and the bearing lever 22, and the rubber cylinder 6 is moved from the position shown by the solid line in FIG. 3 to the position shown by the two-dot chain line. Move around the impression cylinder 5 slightly clockwise.

  At this time, since the rotation of the impression cylinder gear 5a is restricted by operating the brake of the driving motor 1 and applying the brake, the rubber cylinder gear 6a meshing with the impression cylinder gear 5a is placed on the impression cylinder gear 5a. Roll slightly clockwise. For this reason, the rubber cylinder gear 6a rotates slightly clockwise as described above, so that the plate cylinder gear 7a meshing with the rubber cylinder gear 6a slightly rotates counterclockwise, and the plate cylinder 7 is fixed. Positioned in position.

  In the present embodiment, the brake is provided on the driving motor 1 itself. However, a braking device for braking the impression cylinder 5 may be provided on the motor other than the driving motor 1. Further, by operating the plate cylinder position adjustment button 24, the stepping motor 18 is driven in accordance with the stop position of the plate cylinder 7 detected by the stop position sensor 11, but the plate change button of the plate changer is operated. By operating, the stepping motor 18 may be driven according to the stop position of the plate cylinder 7 detected by the stop position sensor 11.

1 is a side view showing an outline of a driving device for a printing press according to the present invention. It is a side view of the cylinder attachment / detachment device in the drive device of the printing press which concerns on this invention. FIG. 5 is a schematic side view for explaining the movement of the shaft center of the rubber cylinder by the rotation of the eccentric bearing in the cylinder attaching / detaching device for the drive device of the printing press according to the present invention. It is a block diagram which shows the structure of the drive device of the printing press which concerns on this invention. FIG. 5 is a schematic side view for explaining that the printing cylinder is rotated and positioned to a fixed position by the cylinder attaching / detaching device in the driving device of the printing press according to the present invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Drive motor (motor), 5 ... Impression cylinder (1st cylinder), 6 ... Rubber cylinder (2nd cylinder), 7 ... Plate cylinder (3rd cylinder), 11 ... Stop position sensor, 12 ... Cylinder Detachable device, 14... Eccentric bearing, 18... Stepping motor (cylinder insertion motor), 24.

Claims (2)

A first cylinder driven by a prime mover; a second cylinder coupled to the first cylinder via a mutual gear; and rotatably supported via an eccentric bearing; and the second cylinder and the mutual A third cylinder coupled via a gear, and a cylinder for performing barrel insertion and barrel removal with respect to the first cylinder and the third cylinder by rotating the eccentric bearing; In a driving device for a printing press, comprising: an attachment / detachment device; a cylinder stop position detection device that detects a stop position of the third cylinder; and a braking device that brakes the first cylinder.
Driving a printing press, comprising: a controller that drives the cylinder attaching / detaching device based on a detection value detected by the cylinder stop position detecting device in a state where the prime mover is stopped and the braking device is operated. apparatus.   2. The drive device for a printing press according to claim 1, wherein the prime mover includes the braking device.

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