JPH06949A - Device for laterally reciprocating kneading rollers - Google Patents

Abstract

PURPOSE:To provide a compact device having a small number of components by causing a cylindrical cam member to slide a crank member having a cam follower to thereby axially reciprocate respective kneading rollers. CONSTITUTION:A cylindrical cam member 4 at a central position of a plurality of kneading rollers 2 is rotated by a second gear 16 on a drive gear 14 whereupon the plurality of kneading rollers 2 are axially reciprocated by a crank member 9 which has a cam follower 10 adapted to engage with a cam groove 5 of the cylindrical cam member 4. At this time, the crank member 9 performs sliding movement in an axial direction of the kneading rollers 2 while being controlled along the outer periphery of the cylindrical cam member 4. On the other hand, the plurality of kneading rollers 2 are caused by a first gear 15 of the drive gear 14 to continue to rotate. Such laterally reciprocating movements further promote disintegration, transfer and uniformization of ink between the kneading rollers 2 and rubber rollers which contact with the rollers 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inking device for a printing press, and more particularly to a lateral shaker for a plurality of kneading rollers.

[0002]

BACKGROUND OF THE INVENTION In an inking unit of a printing press, an appropriate amount of ink stored in an ink fountain is taken out by a doctor roller, passed through a large number of rollers, and then supplied to a plate surface by a forming roller. In the ink supply path of such a roller group, the ink is repeatedly split and transferred, and the ink is made uniform on the roller surface. Among the roller group, in particular, the metal kneading roller that comes into contact with the rubber roller is laterally reciprocated once in the axial direction for every two rotations of the plate cylinder. it can.

[0003]

2. Description of the Related Art As a lateral swinging device for a kneading roller,
Japanese Unexamined Patent Publication No. 61-249754 discloses a technique in which a kneading roller is reciprocated in the axial direction by an oscillating arm. It has the drawback that it requires a lot of space.

Japanese Patent Publication No. 47-49525 discloses a technique in which a kneading roller is directly swung by a cylindrical cam without using a swinging arm. This technique is known as kneading. The problem is that the roller support structure is complicated and thus requires a large number of components.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides an improved kneading roller lateral swinging device, which has an object of being compact and having a small number of constituent parts. It is in.

[0006]

To this end, the kneading roller lateral swing device according to the present invention comprises a plurality of kneading rollers (2) rotatably and axially movable between the side walls (1) of the printing machine. ), A cylindrical cam member (4) having a cam groove (5) rotatably supported by the side wall (1) at substantially the central position of these kneading rollers (2) and the ends of the kneading rollers (2). The cylindrical cam member (4) is provided with an abutting part (11) having a cam follower (10) which engages with the cam groove (5) while allowing the kneading roller (2) to rotate. Crank member that abuts and slides (9)
And a drive gear (14) for driving the cylindrical cam member (4) and driving the kneading roller (2) while constantly moving while axially moving.

[0007]

When the cylindrical cam member (4) at the central position is rotated by the drive gear (14), the plurality of kneading rollers (2) are engaged with the cam groove (5) by the cam follower (1).
A crank member (9) having 0) reciprocates in the axial direction, and at this time, each kneading roller (2) is rotated by the drive gear (14).

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of a kneading roller lateral swinging device according to the present invention, FIG. 2 is a layout view seen from the right direction in FIG. 1, and FIG. 3 is a perspective view of a single crank member.

In the drawings, reference numeral (1) denotes a side wall of a printing machine, and this side wall (1) is paired with another side wall (not shown) to form a number of rollers including a kneading roller (2). It forms the support substrate for the group. As shown in FIG. 2, there are a plurality of kneading rollers (2) rotatably and axially movably supported between the side walls (1) via bushes (3), and such kneading rollers are also provided. A rubber free roller (not shown) is in contact with (2) to form an ink roller group that causes the ink to split and transfer.

As shown in FIG. 2, a cylindrical cam member (4) is arranged at a substantially central position of the plurality of kneading rollers (2). This cylindrical cam member (4) is provided with a curved cam groove (5) on the outer periphery, and is rotatably supported by a shaft (6) and a bearing (7) implanted in the side wall (1). Has been done. In addition, (8) shows the gear part of the cylindrical cam member (4).

It is the roughly L-shaped crank member (9) shown in FIG. 3 that associates the kneading roller (2) with the cylindrical cam member (4). The crank member (9) is loosely connected to the end of the kneading roller (2) so as not to hinder the rotation of the kneading roller (2), and is configured so that only the axial movement is integrated. A cam follower (10) that engages with the cam groove (5) of the cylindrical cam member (4) is provided at the other end bent into a letter shape. As shown in FIG. 3, the contact portion (11) having the cam follower (10) has two curved surface portions adapted to the outer periphery of the cylindrical cam member (4), and the cylindrical cam member (4). It comes in contact with the outer periphery of and slides. It should be noted that this curved surface portion may be manufactured separately from a metal having good lubricity.

A drive gear (14) rotatably supported on the side wall (1) by a pin (12) and a bearing (13) has a first gear portion (15) and a second gear portion (16). Have Of these, the first gear portion (1
5) is a transmission gear (1) that transmits the driving force of the printing press main body.
7) and meshes with the gear (18) at the end of the kneading roller (2) that moves in the axial direction at all times to give a rotational force to the kneading roller (2). Further, the second gear portion (16) meshes with the gear portion (8) of the cylindrical cam member (4) to give a rotational force to the cylindrical cam member (4).
The drive of the main body of the printing press can be transmitted to another kneading roller (2) by an appropriate gear (19).

Next, the operation will be described. When the cylindrical cam member (4) at the central position of the plurality of kneading rollers (2) is rotated by the second gear portion (16) of the drive gear (14), these will be described. The plurality of kneading rollers (2) engage with the cam follower (1) that engages with the cam groove (5) of the cylindrical cam member (4).
It is reciprocated in the axial direction by means of a crank member (9) having 0). At this time, the crank member (9) slides in the axial direction of the kneading roller (2) while being regulated along the outer periphery of the cylindrical cam member (4). Further, the plurality of kneading rollers (2) are continuously rotated by the first gear portion (15) of the drive gear (14), and due to such rotation and lateral swinging motion, the ink is formed between the kneading rollers and the rubber roller which is in contact therewith. Division, transition, and homogenization are further promoted.

[0014]

According to the kneading roller lateral shaking device of the present invention, a plurality of kneading rollers are caused to rotate and shake in a very small space and with a small number of components, so that a ghost or a shock is generated. There is a significant effect that it is possible to prevent the occurrence of printing problems such as eyes.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a kneading roller lateral swing device according to the present invention.

FIG. 2 is a layout diagram viewed from the right in FIG.

FIG. 3 is a perspective view of a single crank member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 side wall 2 kneading roller 4 cylindrical cam member 5 cam groove 8 gear part 9 crank member 10 cam follower 11 contact part 14 drive gear 15 first gear part 16 second gear part 17 transmission gear 18 gear

Claims (1)

[Claims] 1. A plurality of kneading rollers (2) disposed between a side wall (1) of a printing machine so as to be rotatable and axially movable, and rotatably at a substantially central position of these kneading rollers (2). A cylindrical cam member (4) supported on the side wall (1) and having a cam groove (5) on the outer periphery, and an end of the kneading roller (2) are engaged with the kneading roller (2) while allowing the rotation of the kneading roller (2). And a contact portion (11) having a cam follower (10) engaged with the cam groove (5) is slid in contact with the cylindrical cam member (4).
And a drive gear (14) for driving the cylindrical cam member (4) and driving the kneading roller (2) while always meshing while moving in the axial direction.