JPH0443507B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a printing cylinder exchange unit for a form rotary press that prints and processes business forms using coiled paper.

<Prior art> As shown in FIG. 5, a form rotary press has a paper feeding section 1, a printing section 2, a punching device, a processing section 3 equipped with vertical and horizontal sewing machines, and a discharge unit equipped with a zigzag folding machine. It is composed of a paper section 4. And printing section 2
A system in which a printing cylinder exchange unit, in which a plate cylinder 7, a blanket cylinder 8, and an impression cylinder 9 are pivotally supported on a printing support 6, is removably attached to the frame 5 of
This is known from Japanese Utility Model Application No. 59-38034, and an adjustment device for the impression cylinder 9 is known from Japanese Utility Model Application Publication No. 59-38039.

<Problems to be Solved by the Invention> In the printing cylinder exchange unit of Utility Model Application Publication No. 59-38034, a printing cylinder support body is integrally fixed on a cart having casters, and this is positioned with respect to the frame of the printing section. A dedicated positioning and clamping device for lifting and clamping the printing cylinder support is required for installation, and in the above-mentioned Utility Model Application No. 59-38034, only the printing pressure adjustment between the impression cylinder and the blanket cylinder is required.

An object of the present invention is to provide a printing cylinder exchange unit that eliminates the need for a dedicated positioning clamp device for positioning and mounting a printing support, and that enables not only printing adjustment of an impression cylinder but also the separation and contact of a blanket cylinder with respect to a plate cylinder. It provides:

<Means for Solving the Problems> The present invention provides a form wheel that includes a printing cylinder support, a printing cylinder, a blanket cylinder, and an impression cylinder, and a printing cylinder exchange unit that is detachably attached to a frame of a printing section. The turning machine is a turning machine, in which the blanket cylinder and the impression cylinder are eccentrically rotatably supported on a printing cylinder support, an eccentric rotation arm is fixed to each, and two driven fan-shaped gears each actuate the eccentric rotation arm. is rotatably supported on the printing cylinder support, and rotatably supported on the frame side of the printing section is a drive sector gear that meshes with each of the driven sector gears. Each cylinder is provided with a rotating cylinder, and the printing section is provided with a support base having a smooth upper surface, on which the printing cylinder exchange unit is slidably mounted.

<Function> The present invention allows the blanket cylinder to be moved away from and in contact with the plate cylinder by one driving sector gear and the driven sector gear,
The printing of the impression cylinder relative to the blanket cylinder is automatically adjusted and controlled by the other driving sector gear, the driven sector gear, and the stopper, and the meshing of these two sets of driving sector gear and driven sector gear causes the printing cylinder support, that is, the printing cylinder The replacement unit is positioned and clamped to the frame of the printing section.

<Examples> Examples of the present invention will be described below with reference to FIGS. 1 to 4. In FIG. 1, 5 is the printing section 2
A frame 6 (see FIG. 5) is a printing cylinder support constituting a printing cylinder exchange unit, on which a plate cylinder 7, a blanket cylinder 8 and an impression cylinder 9 are pivotally supported. As shown in FIG. 2, the blanket body 8 has a support shaft 10 supported on an eccentric bearing 11.
The eccentric bearing 11 has an arm 12 projecting from the eccentric bearing 11 . Similarly, as shown in FIG. 3, the impression cylinder 9 has a support shaft 13 supported on an eccentric bearing 14.
It is designed to rotate eccentrically by rotating 4.
An arm 15 is provided protruding from the eccentric bearing 14.

Further, two driven fan-shaped gears 16 and 19 are rotatably supported on the printing cylinder support 6 at two positions, upper and lower. As shown in FIG. 2, the upper driven fan-shaped gear 16 is provided with an arm 17 that rotates integrally therewith, and this arm 17 and an arm 12 that protrudes from the eccentric bearing 11 of the planket body 8. are connected by a rod 18. Further, as shown in FIG. 3, the lower driven fan-shaped gear 19 is provided with an arm 20 that rotates together with the lower driven fan-shaped gear 19, and an arm that projects from the eccentric bearing 14 of the impression cylinder 9. 15 are connected by a rod 21.

A horizontal support base 34 on which the printing cylinder support 6 is set is provided at the lower part of the frame 5 of the printing section 2 to which the printing support 6 is removably attached. Driving sector gears 22 and 24 that mesh with the driven sector gears 16 and 19 of the printing cylinder support 6 set on the support base 34 are rotatably supported on the frame 5 side. The drive sector gear 22 that meshes with the upper driven sector gear 16 has a cylinder 2 for driving it to rotate at a predetermined angle.
3 and meshes with the lower driven sector gear 19, the drive sector gear 24 is connected to a cylinder 23 for driving the gear to rotate at a predetermined angle, and regulates the increase or decrease of the rotation position within this predetermined angle range. A stopper mechanism is provided. This stopper mechanism is the fourth
As shown in the figure, the stopper shaft 27 that comes into contact with the contact portion 26 formed on the drive fan-shaped gear 19 is attached to the frame 5.
The stopper shaft 27 is held movably forward and backward in the axial direction by a holding member 28 fixed to the frame 5, while being prevented from rotating.The rear end of the stopper shaft 27 is rotatably supported by a bearing 31 fixed to the frame 5. Screw 29
are screwed together. A pulley 30 is fixed to this screw 29, and as shown in FIG. 1, its rotation is transmitted to a pulley 33 of an actuator 32 such as a servo motor or a step motor by a timing bell 34a. The actuator 32
is operated based on the printing pressure adjustment signal from the NC control device.

Reference numeral 35 denotes a cylinder that presses the printing cylinder support 6 set on the support base 34 toward the frame 5, and the actuating arm 3 pivotally supported on the support base 34
6 and provided on the actuating arm 36
Reference numeral 7 is for pressing against the inclined contact surface 38 provided at the lower part of the printing cylinder support 6.

Since the present invention is configured as described above, the printing cylinder support 6 is carried to the support base 34 by a separate trolley (not shown) and placed on the support base 34. This support base 34 constitutes a horizontal reference surface, and the printing cylinder support 6 placed on the support base 34 corresponds to the frame 5 of the printing unit in both horizontal and vertical positions. At the same time, the driven sector gears 16 and 19 on the side of the printing cylinder support 6 are connected to the frame 5.
It meshes with the drive sector gears 22 and 24 on the side. Then, the cylinder 35 is operated, and the roller 37 of the operating arm 36 is pressed against the inclined contact surface 38 to press the printing cylinder support 6.
is pressed from behind.

The driven fan gears 16 and 19 meshed with the drive fan gears 22 and 24 are rotated by the operation of the cylinders 23 and 25. One of the driven sector gears 16 is a drive sector gear 22 driven by the stroke end of the cylinder 23.
This movement is transmitted to the eccentric bearing 11 via the arm 17, the rod 18, and the arm 12, and the eccentric bearing 11 is rotated eccentrically with respect to the axis of the support shaft 10. This is to move the cylinder 8 away from and into contact with the plate cylinder 7.

The other driven sector gear 19 is rotated by the rotation movement of the drive sector gear 24 due to the stroke of the cylinder 25, and this movement is transmitted to the arm 20 and the rod 21.
The contact pressure on the blanket cylinder 8 is transmitted to the eccentric bearing 14 via the arm 15 and rotated eccentrically with respect to the axis of the support shaft 13 to move the impression cylinder 9 away from and into contact with the blanket cylinder 8. is controlled by a stopper shaft 27 that regulates the rotational position of the drive sector gear 24. This stopper shaft 27 is
The screw 29 is operated by an actuator 32 that is operated based on a printing pressure adjustment signal from an NC control device.
The drive fan-shaped gear 19 is moved forward and backward by the required amount of forward and reverse rotation, and the contact portion 26 is in contact with the stopper shaft 27.
The printing pressure is automatically adjusted by changing the rotation end position.

<Effects of the Invention> As described above, the present invention has the following special effects. To lock the positioning of the printing cylinder support, that is, the printing cylinder exchange unit, with respect to the frame of the printing section, place the printing cylinder support on a support base that serves as a reference surface, and mesh the driven sector gear with the drive sector gear on the frame side. This eliminates the need for a dedicated positioning and locking device that lifts and locks the printing cylinder support together with the cart provided with casters as in the prior art, and the unit can be easily replaced. In addition, since the blanket cylinder can be attached to and separated from the plate cylinder,
By separating the blanket cylinder from the plate cylinder during idle operation when no paper is passed through or when the operation is stopped, unnecessary transfer of ink from the plate cylinder to the blanket cylinder is eliminated and the impression cylinder is prevented from becoming soiled.

Furthermore, the contact pressure of the impression cylinder with respect to the blanket cylinder, that is, the printing pressure adjustment, is controlled by a stopper shaft that is automatically controlled based on the printing pressure adjustment signal, and the rotation end position of the drive sector gear is linked via the driven sector gear. Since the pressure is transmitted to the impression cylinder by the pressure mechanism, fine printing pressure is reliably and automatically adjusted.

[Brief explanation of drawings]

FIG. 1 is a side view of the present invention, FIG. 2 is a diagram of the operation mechanism of the blanket cylinder, and FIG. 3 is a diagram of the operation mechanism of the impression cylinder.
FIG. 4 is an enlarged sectional view taken along the line of FIG. 1, and FIG. 5 is an overall view of the foam rotary press. 2... Printing section, 5... Frame, 6... Printing cylinder support, 7... Plate cylinder, 8... Blanket cylinder, 9
... impression cylinder, 11 ... eccentric bearing, 12 ... arm,
14... Eccentric bearing, 15... Arm, 16... Driven sector gear, 17... Arm, 18... Rod,
19... Driven sector gear, 20... Arm, 21...
... Rod, 22 ... Drive sector gear, 23 ... Cylinder, 24 ... Drive sector gear, 25 ... Cylinder, 27 ... Stopper shaft, 29 ... Screw,
32... Actuator.

Claims (1)

[Claims] 1. A form rotary press equipped with a printing cylinder support, a printing cylinder, a blanket cylinder, and an impression cylinder, and a printing cylinder exchange unit detachably attached to the frame of the printing section, wherein the printing cylinder and the impression cylinder are used for printing. It is eccentrically rotatably supported on the trunk support, and
The eccentric rotation arms are each fixed, and two driven sector gears for operating the eccentric rotation arms are rotatably supported on the printing cylinder support, and each of the driven sector gears is mounted on the frame side of the printing section. A driving sector gear that meshes with the gear is rotatably supported, and a cylinder is provided to rotate each of the driving sector gears, and the printing section is provided with a support base having a smooth upper surface. A form rotary press equipped with a printing cylinder exchange unit, characterized in that the printing cylinder exchange unit is slidably mounted thereon.