JPS62198461A - Roller positioning device in press - Google Patents

Abstract

PURPOSE:To simplify a positioning operation for a plate cylinder and a roller to enable an efficient operation, by a method wherein a pressing and separating operation between the roller and the plate cylinder is conducted through a ink mechanism, and a roller positioning mechanism is provided which automatically makes a form roller eccentric following an eccentric shift of the plate cylinder. CONSTITUTION:The rotation of a bearing housing 20 disposed at one end side of a plate cylinder 12 in a direction of Arrow E shifts a center of rotation from a position O1 to a position O2, which makes a peripheral portion 22 of a cam member 24 eccentric in a direction of Arrow F concentrically to the plate cylinder 12, thus a roller 58 being in slide contact with the peripheral portion 22 is pressed in the direction of Arrow F. In this case, a stopper member 62 which is pressed by a belleville spring 72 engages with a groove portion 60a of the other end portion of a rocking lever 56, which prevents the rocking lever 56 from rocking and presses a plate body 46 in the direction of Arrow F. Here, an arm member 40 rocks about a link pin 76 and the center of a hole portion 44 shifts eccentrically to a bearing housing 38, thus a constant distance between a forme roller 14 and the roller 58 is always ensured and the roller 14, the roller 58, and the plate cylinder 12 are aligned straight at the centers thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roller position adjustment device for a printing press, and more specifically, for example, in a printing press, an ink forming roller can be brought into contact with and separated from a plate cylinder, and the roller position adjustment device When positioning, the position of the ink form roller is automatically adjusted following the eccentric movement of the plate cylinder, so that the ink form roller is always kept in good pressure contact with the plate cylinder for printing. No unevenness in images or lines,
Therefore, the present invention relates to a roller position adjustment device for a printing press that makes it possible to obtain printed matter with excellent quality and accuracy.

Among various printing machines, rotary printing presses are widely used. The rotary printing press basically includes a plate cylinder around which a printing plate is wound, an inking device that supplies ink to the plate cylinder, and an impression cylinder that performs printing in contact with the plate cylinder. In this case, the inking device is generally configured as follows.

That is, after supplying ink from the ink groove to the ink dispenser roller and transferring this ink to the ink transfer roller,
This is sequentially transferred to a plurality of ink mixing roller groups. The ink suitably kneaded by the ink mixing roller is further supplied to an ink forming roller, and finally, the ink is transferred to the plate wrapped around the plate cylinder, which is pressed against the ink forming roller, and is subjected to a printing action.

By the way, in the ink applicator, it is necessary to separate the ink applicator roller, which is in pressure contact with the plate cylinder during printing, from the plate cylinder when printing is not performed.

For example, if an ink applicator roller is constantly pressed against the plate cylinder, a sticky layer of ink will be formed at the pressure contact area, and when printing starts again, the printing paper will stick to the sticky layer and the printing paper itself will be damaged. Otherwise, printing defects may occur, resulting in a decrease in quality accuracy.

Therefore, a roller moving device has conventionally been used to press the ink form roller against and separate it from the plate cylinder.

In this conventional roller moving device, both ends of the ink form roller are rotatably supported by arm members, and the arm members are configured to be movable t3 around an ink mixing roller that is in pressure contact with the ink form roller. ing. Furthermore, a link mechanism provided with an actuator such as an air cylinder is engaged with the arm member.

In such a configuration, the arm member swings around the inking roller through the link mechanism under the action of the actuator, and as a result, the inking roller is pressed into contact with the plate cylinder and displaced away from it. positioned at a predetermined position.

On the other hand, the plate cylinder and the impression cylinder must be in contact with each other with uniform pressure in their axial directions. For example, if the pressure on the contact surface between the plate cylinder and the impression cylinder is uneven, the printing paper passing between the plate cylinder and the impression cylinder will have crushed or uneven print lines, resulting in poor printing. It becomes a big factor. Therefore, adjustments are made to make one end or both ends of the plate cylinder eccentric to ensure a suitable state of pressure contact with the impression cylinder.

However, if the plate cylinder is made eccentric as described above, the state of pressure contact between the plate cylinder and the ink forming roller changes. For example, if the center of one end of the plate cylinder is eccentric, the contact pressure between the plate cylinder and the ink forming roller will be different at both ends.
In the end, the resulting printed matter has low quality accuracy. Therefore,
After adjusting the position of the plate cylinder, it is necessary to further adjust the center position of the inking roller. In other words, by adjusting the length of the links that make up the link mechanism via turnbuckles, etc., one end of the inking roller was made eccentric, and trial printing was performed each time, and in the end, good printed matter was obtained. The adjustment work is carried out by fixing the turnspuncle in position.

In this way, in the above-mentioned conventional technology, when adjusting the position of the plate cylinder, the ink forming roller is eccentrically operated, and as mentioned above, the adjustment operation is extremely complicated. In practice, it is necessary to rely on a person with considerable μi expertise, and furthermore, even such an experienced person takes a considerable amount of time to perform the adjustment work. For this reason, a disadvantage arises in that it is impossible to perform efficient printing work.

The present invention has been made in order to overcome the above-mentioned disadvantages, and includes a link mechanism that is engaged with an arm member that rotatably supports a roller that presses against the plate cylinder, such as an ink form roller. The arm member is oscillated under the action to press and separate the ink form roller and the plate cylinder, and the arm member is connected to a housing that rotatably supports both ends of the plate cylinder at eccentric positions. By providing the roller position adjustment mechanism, when the housing is rotated to adjust the position of the plate cylinder, the inking roller is automatically adjusted to follow the eccentric movement of the plate cylinder via the roller position adjustment mechanism. It is an object of the present invention to provide a roller position adjustment device for a printing press that can be eccentrically set, and therefore allows the roller position adjustment to be extremely simplified without relying on an experienced person, and that makes it possible to obtain printed matter with high quality accuracy. shall be.

In order to achieve the above-mentioned object, the present invention provides a roller position adjustment device that presses and separates a roller constituting a printing press from a plate cylinder, which comprises an arm that rotatably supports the roller and is swingable. a link mechanism that swings the arm member under the action of an actuator to press the roller against and away from the plate cylinder; and a link mechanism that is provided between the arm member and the plate cylinder and is connected to the plate cylinder. It is characterized by including a roller position adjustment mechanism that adjusts the relative position with respect to the roller.

Next, preferred embodiments of the roller position adjustment device for a printing press according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, reference numeral 10 designates a roller position adjustment device for a printing press according to the invention. In this case, the roller position adjustment device 10 is engaged with a plate cylinder 12, an ink forming roller 14, and an ink mixing roller 16 that constitute a rotary printing press.

That is, the central shaft 1 provided at both ends of the plate cylinder 12
8 is rotatably supported by a holder, that is, the bearing housing 20, and the central axis I8 is eccentric with respect to the center of the bearing housing 20. An arcuate cam member 24 having an outer circumferential portion 22 concentric with the outer circumferential surface of the plate cylinder 12 is fixed to the side surface of the bearing housing 20 via bolts or the like.

On the other hand, an ink forming roller 14 is in pressure contact with the plate cylinder 12, and an ink mixing roller 16 is connected to the ink forming roller 14.
are pressed together. The inking roller 14 and the inking roller 16 are each rotatably supported by a bearing housing 36, 38, the bearing housing 36 is fitted into a hole 42 provided at one end of an arm member 40, and the bearing housing 38 is Hole 4 provided at the other end of arm member 40
4 and is supported by the printing press body. The arm member 40 is configured to be able to swing around the ink mixing roller 16, and is provided with a support member 50 including a plate member 46 and a cylindrical lower portion 48 at its end on the ink forming roller 14 side.

Holes 52a and 52b having different diameters are provided in the lower part 4, respectively.
are drilled coaxially. A substantially intermediate portion of a swing lever 56 is supported by the plate body 46 via a pin member 54 . A roller 58 is provided at one end of the swinging lever 56, and the roller 58 is in sliding contact with the outer peripheral portion 22 of the cam member 24, while the swinging! J) Grooves 60a and 60b are formed on both sides of the other end of the lever 56. Note that the tip of the stopper member 62 is engaged with the groove 60a of the swing lever 56.

The stopper member 62 has a large diameter portion 6 that fits into the hole 52a.
4 and a small diameter rod portion 66 that fits into the hole portion 52b. A threaded groove 68 is cut into the rod portion 66, and nuts 70a and 70b are screwed into the threaded groove 68 to cause the stopper member 62 to protrude toward the swing lever 56 by a predetermined length. Furthermore, a stopper member 6 is provided in the lower part 48 at one end.
A disc spring 72 that engages with the large-diameter portion 64 of No. 2 is disposed, and the stopper member 62 presses the groove portion 60a of the swing lever 56 in the direction of arrow A through the elastic force of the disc spring 72.

In this case, as shown in FIG. 2, one end of the swing lever 56 is pressed by the stopper member 62, and the swing lever
At the position where the roller 58 provided at the other end of the roller 6 contacts the cam member 24, the center of the ink forming roller 14, the center of the roller 58, and the center of the plate cylinder 12 are aligned with each other. Select the shape of the moving lever 56 in advance.
(Refer to the one-dot chain line in FIG. 2.) Second, a coil spring 7 is provided between the groove 60b of the swing lever 56 and the arm member 40.
Interpose 4.

Furthermore, a first link member 78 is connected to the arm member 40 via a link pin 76 at a position close to the support member 50.
The threaded portion 80 formed at the end of the first link member 78 is screwed into the turnbuckle 82 by a predetermined length, and the turnbuckle 82 is screwed into the turnbuckle 82 through the lock nut 84.
is fixed to. At the other end of the turnbuckle 82,
Similarly, a threaded portion 88 is screwed through a lock nut 86, and the end portion of the threaded portion 88 has a ? 2 link member 9
0 is set. The second link member 90 is a link pin 92
The movable shaft 9 is engaged with the third link member 94 via a gear 96, and the moving shaft 9 is engaged with the third link member 94 via a gear 96. The moving shaft 98 is configured to be movable a predetermined distance by loosely fitting into a guide hole provided in the main body of the printing press, and the other ends of the ink forming roller 14 and the ink mixing roller 16 are attached to one end of the moving shaft 98. An arm member (not shown) provided on the side is engaged. A fourth link member 100 engages with the moving shaft 98, and the fourth link member 100 engages with a fifth link member 104 via a link pin 102. The fifth link member 104 is an actuator,
For example, rod 106 extending from air cylinder 106
It is attached to a.

The roller position adjustment device for a printing press according to the present invention is basically constructed as described above, and its operation and effects will be explained next.

First, when separating the ink forming roller I4 that is in pressure contact with the plate cylinder 12 from the plate cylinder 12, the air cylinder 106
is driven to displace the rod 106a inward of the cylinder 106. Therefore, the moving shaft 98 is displaced in the direction of arrow C along a guide hole (not shown) via the fifth link member 104 and the fourth link member 100 that are engaged with the rod 106a. Therefore, the third link member 94, the second link member 90, and the first link member 78 that engage the moving shaft 98 are displaced in the direction of arrow C. As a result, the first
) The arm member 40 that engages with the Jink member 78 swings around the ink mixing roller 16, and this arm member 40
An inking roller 14, which is supported on the plate cylinder 12, is spaced apart from the plate cylinder 12.

Next, when the ink form roller 14 is brought into pressure contact with the plate cylinder 12, the steps described above may be performed in reverse. That is, if the air cylinder 106 is driven to protrude the rod 106a, the fifth link member 104 and the fourth link member 10
0, the moving shaft 98 is displaced in the direction of the arrow. in the end,
One end of the swinging lever 56 is pressed by a roller 58 and the cam member 24, and the other end of the swinging lever 56 is pressed by a disc spring 7.
In order to press the stopper member 62 that engages with the arm member 4
0 is held in position.

By the way, before printing, one end or both ends of the plate cylinder 12 are eccentrically adjusted to suitably adjust the state of pressure contact with an impression cylinder (not shown). In this case, according to the present invention, the above-mentioned The ink forming roller 14 follows the eccentricity of the plate cylinder 12.
can be automatically adjusted to position IXJ.

That is, when the bearing housing 20 at one end of the plate cylinder 12 is rotated in the direction of arrow E, the center of rotation OI at the one end of the plate cylinder 12 is eccentric to a position of 0□.

For this reason, the cam member 2 fixed to the bearing housing 20
The outer peripheral portion 22 of the plate cylinder 12 is concentrically arranged in the direction of arrow F (the second
In the figure, the roller 58, which is eccentric from the position indicated by the broken line to the position indicated by the solid line) and slides into contact with the outer peripheral portion 22, is pressed in the direction of arrow F. In this case, the roller 58 is supported by one end of the swinging lever 56, and since the roller 58 is pressed in the direction of arrow F, the swinging lever 56 tries to swing about the pin member 54 as a fulcrum. . However, since a stopper member 62 pressed by a disc spring 72 engages with a groove 60a formed at the other end of the swing lever 56, the swing lever 56
6 cannot swing, and the plate 46 supporting the swing lever 56 is pressed in the direction of arrow F.

Here, the arm member 40 has one end engaged with the link pin 76, and a hole 44 provided at the other end loosely fits the bearing housing 38 of the ink mixing roller 16. Therefore, the arm member 40 swings around the link pin 76, and the center of the hole 44 is eccentric with respect to the center of the bearing housing 38. As a result, the ink form roller 14 is eccentric in the direction of arrow F, and the distance between the ink form roller 14 and the roller 58 is always maintained constant, and the distance between the center of the ink form roller 14, the center of the roller 58, and the plate cylinder 12 is maintained constant. It is located on the same line as the center.

In this way, by simply adjusting the position of the plate cylinder 12, the ink applicator roller 14 in pressure contact with the ink applicator roller 14 follows the eccentric movement of the plate cylinder 12, and the ink applicator roller 14 and the plate cylinder 12 are brought into pressure contact with each other. It becomes possible to ensure a uniform and good condition in the axial direction. In this case, since the stopper member 62 that engages with the end of the swing lever 56 is pressed by the disc spring 72, the impact that is likely to be caused to the arm member 40 when adjusting the position of the plate cylinder 12 is absorbed by the arm member 40. It can be relaxed through the elastic force of the spring 72. Furthermore, since the coil spring 74 is engaged with the groove 60b of the swing lever 56, for example, the elastic force of the disc spring 72 that acts on the swing lever 56 when separating the ink form roller 14 from the plate cylinder 12 This makes it possible to suitably hold the swing lever 56 against this. Note that the bearing housing 38 is loosely fitted into the hole 44 of the arm member 40;
0 is the swing lever 5 that engages with the link bin 76 and the plate body 46
6, the ink form roller 14 is held during printing.
is never eccentric.

As described above, according to the present invention, the roller and the plate cylinder are brought into pressure contact and separated from each other via the link mechanism, and when positioning the plate cylinder, the ink form roller follows the eccentricity of the plate cylinder. Equipped with a roller position adjustment mechanism that automatically eccentricizes the roller. Therefore, it is not necessary to adjust the ink forming roller or the like that presses against the plate cylinder by simply adjusting the position of the plate cylinder. In the end, compared to the conventional method of manually aligning the ink form roller while making test prints, the work of adjusting the position of the plate cylinder and rollers is extremely simple and efficient. becomes.

Although the present invention has been described above with reference to a preferred embodiment, the present invention is not limited to this embodiment. Of course, various improvements and changes in design are possible without departing from the gist of the present invention, such as being able to be applied to a water application roller that supplies water.

[Brief explanation of drawings]

FIG. 1 is a partially omitted perspective view of a roller position adjustment device according to the present invention, and FIG. 2 is a partially sectional side view of the device of the present invention. 10... Roller position adjustment device 12... Plate cylinder 14
...Ink application roller

Claims (3)

[Claims] (1) A roller position adjustment device that presses and separates a roller constituting a printing press from a plate cylinder, which includes an arm member that rotatably supports the roller and is swingable; a link mechanism that swings an arm member to press the roller against and away from the plate cylinder; and a roller that is provided between the arm member and the plate cylinder and adjusts the relative position of the plate cylinder and the roller. 1. A roller position adjustment device for a printing press, comprising a position adjustment mechanism. (2) In the apparatus according to claim 1, the roller position adjustment mechanism is fixed to a holder that rotatably supports the plate cylinder at an eccentric position, and the roller position adjustment mechanism is fixed to a holder that rotatably supports the plate cylinder at an eccentric position, and the roller position adjustment mechanism has an outer peripheral portion concentric with the plate cylinder. the formed cam member, a lever member rotatably supported by an arm member via an elastic body, and a roller supported at an end of the lever member, and when the plate cylinder and roller are pressed together, The roller slides against the outer circumference of the cam member against the elastic force of the elastic body that engages with the lever member, and
A roller position adjustment device for a printing press configured so that the center of rotation of a plate cylinder, the center of rotation of a roller, and the center of rotation of a roller are located in a straight line. (3) A roller position adjustment device for a printing press, in which the rollers include an ink forming roller and/or a water forming roller.