JPH0671863A - Ink feeder of printing machine - Google Patents

Abstract

PURPOSE:To make the installation space of ink printing rollers smaller. CONSTITUTION:A rectangular supporting bar 7 attached on a frame is fitted into square holes 10 formed in two or more movable short cylinders 8 with gaps in the widthwise direction of the supporting bar 7. Ink printing rollers 5 are rotatably mounted on the movable cylinders 8 respectively, and changeover devices 14 are provided between the movable cylinders 8 and the supporting bar 7. To change positions of the ink printing rollers 6 individually, the movable cylinders 8 are moved in the widthwise direction of the supporting bar 7 by the changeover devices 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink supply device for a printing machine, and more specifically, a plurality of ink feeding rollers arranged between an ink source roller and an ink mixing roller in the axial direction of these rollers. The present invention relates to an ink supply device for a printing machine, wherein each ink feeding roller is individually switched to two positions between the ink source roller and the ink kneading roller so that the contact state with the ink source roller and the ink kneading roller is changed.

[0002]

2. Description of the Related Art As an ink supply device for a printing machine of this type, each ink feeding roller is rotatably attached to a swing end of a swing arm, and the swing arm is swung by an air cylinder or the like. Each of the ink feeding rollers comes into contact with the ink source roller and separates from the ink kneading roller.
It is known that the position can be switched to a second position in contact with the ink kneading roller and away from the ink source roller.

However, the conventional ink supply device as described above has a problem that a plurality of sets of rocking arms are required to switch the position of the ink feeding roller, which requires a large installation space.

The object of the present invention is to solve the above problems,
An object of the present invention is to provide an ink supply device for a printing press that requires a small installation space for the ink feeding roller.

[0005]

The ink supply device for a printing press according to the present invention is divided between an ink source roller and an ink kneading roller, which are supported by a frame so as to be parallel to each other, in the axial direction of these rollers. A plurality of inking rollers arranged at intervals in the axial direction, and each of the inking rollers individually in two positions between the inking roller and the ink kneading roller so that the contact state with the inking roller and the ink kneading roller changes. In an ink supply device for a printing press that is configured to be switched, a rectangular columnar support member fixed to a frame has a plurality of short columnar movable members each having a square hole portion formed on one side of the support member. Are fitted to each other so as to have a gap in the width direction thereof, and ink replenishing rollers are rotatably attached to the outer sides of the respective movable members, and between the respective movable members and the supporting member. Part, is characterized in that by moving the movable member in the width direction of the support member switch switching the position of the ink ductor roller individually device is provided.

In some cases, the end portions of the adjacent ink feeding rollers are integrally connected by a thin flexible tube portion.

[0007]

A plurality of movable members and an ink recalling roller are arranged around a supporting member fixed to the frame, and a switching device is provided only in a portion between each movable member and the supporting member. There is no need to provide a member for switching the position of the ink replenishing roller such as a conventional swing arm on the outside of the roller. For this reason, it suffices if there is a space for providing the ink feeding roller between the ink source roller and the ink kneading roller, and the installation space for the ink feeding roller is small.

If the end portions of the adjacent ink feeding rollers are integrally connected by the thin flexible tubular portion, it is possible to prevent the ink from entering between the ink feeding rollers. Moreover, since the tubular portion is thin and has flexibility, it does not prevent the calling rollers from being individually switched to two positions.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 schematically shows a part of an ink supply device of a printing machine, and FIGS. 2 and 3 show an enlarged main part thereof. In the following description, the right side of FIGS. 1 and 3 is the front, the left side is the rear, and the left and right when viewed from the front to the rear, that is, the left and right in FIG.

An ink source roller adjacent to an ink amount adjusting plate (doctor blade) (2) forming the bottom of the ink fountain (1)
The first ink kneading roller (4) of the plurality of ink kneading rollers is arranged behind (3), and these rollers (3) (4) are arranged between the original roller (3) and the kneading roller (4). ) A plurality of ink dispensing rollers (5) divided in the axial direction are arranged at intervals in the axial direction. Original roller (3) and kneading roller
(4) is the frame of the printing machine (6) so that they are parallel to each other
It is rotatably supported by the motor and is rotated in the direction of the arrow in FIGS. 1 and 3 at a predetermined rotational speed synchronized with each other by a driving device (not shown).

The calling roller (5) is a movable member (8) and a ball around a supporting member (7) fixed to the frame (6) so as to be parallel to the original roller (3) and the kneading roller (4). bearing
Mounted via (9). The support member (7) has a prismatic shape having a front-rear width larger than the vertical width, and both ends thereof are fixed to the frame (6). The movable member (8) is in the shape of a short cylinder, and a square hole (10) is formed in the center of the movable member (8) so as to penetrate through the movable member (8) in the axial direction. Further, a groove (11) is formed on the upper surface of the hole (10) over the entire length of the movable member (8). A plurality of movable members (8) are lined up in a space in the axial direction between a pair of disc-shaped positioning members (12) fixed to the frame (6), and holes (10) of these movable members (8) are arranged. ) Supporting member
(7) is passed. The vertical width of the hole (10) of the movable member (8) is almost equal to the vertical width of the support member (7), and the upper and lower surfaces of the hole (10) are in sliding contact with the upper and lower surfaces of the support member (7). Also, the hole (1
The front-back width of (0) is slightly larger than the front-back width of the support member (7), and the movable member (8) has a front end position where the rear surface of the hole (10) contacts the rear surface of the support member (7) and the front surface of the hole (10). Is movable in the front-rear direction between a rear end position of the support member (7) contacting the front surface of the support member (7). The end surface of the movable member (8) is
It is only in sliding contact with the end face of (8) or the end face of the positioning member (12), and each movable member (8) can move individually in the front-back direction. Inner rings of two bearings (9) are fixed on the outer peripheral surface of each movable member (8), and a thick rubber cylinder is formed around a metal sleeve (13) fixed to the outer rings of these bearings (9). Call roller (5) is locked.

A switching device (14) for the calling roller (5) is provided in the portion between each movable member (8) and the support member (7) as follows. That is, at the portion of the support member (7) corresponding to the axial center of the movable member (8), there is a cylinder portion (15) extending slightly from the rear surface to the front and a spring accommodating hole (16) extending slightly from the front surface. Has been formed. Cylinder part (13)
A piston (17) is slidably inserted in the inside through an O-ring (18). Insert the biasing pin (1
9) is inserted so as to be slidable back and forth, and a compression coil spring (20) for biasing the same is inserted. An air supply hole (21) extending in the axial direction is formed in the support member (7), and one end of this hole (21) is connected to a compressed air source (not shown). Support member (7) facing the groove (11) of the movable member (8)
The solenoid valve (22) is attached to the upper surface of the valve, and the two ports of this valve (22) are connected to the communication hole (23) (2) formed in the support member (7).
The air supply hole (21) and the cylinder portion (15) are communicated with each other via 4). Further, the electric wire (25) of the valve (22) is drawn out through the groove (11) and is connected to the control circuit (26). And the state where the valve (22) is energized (ON state)
In the cylinder section (15) is communicated with the air supply hole (21) through the valve (22), the cylinder section (15) communicates with the atmosphere through the valve (22) when the energization is stopped (OFF state). It is designed to communicate.

A valve (22) of each switching device (14) in the control circuit (26)
By switching the energization state of the first roller, the calling roller (5) comes into contact with the original roller (3) and moves away from the kneading roller (4).
The position is switched to the second position in which the kneading roller (4) is brought into contact with the kneading roller (4) and is separated from the original roller (3). When the valve (22) is switched to the off state, the cylinder part (15) is brought into communication with the atmosphere, so that the piston (17) can freely move inside the cylinder part (15). Therefore, as shown by the solid line in FIG. 3, the movable member (8) is moved forward by the spring (20) and the pin (19). As a result, the calling roller (5) is switched to the first position and pressed against the original roller (3). Then, the calling roller (5) is moved by the frictional force between the calling roller (5) and the former roller (3), as shown in FIG.
Can be rotated in the direction of the arrow. When the valve (22) is switched to the ON state, the cylinder portion (15) communicates with the air supply hole (21), so compressed air is supplied to the cylinder portion (15). Therefore, as shown by the chain line in FIG. 3, the piston (17) projects rearward from the support member (7) against the force of the spring (20), which causes the movable member (8) to move rearward. To be made. As a result, the calling roller (5) is switched to the second position and pressed against the kneading roller (4). And the calling roller
(5) is rotated in the direction of the arrow in FIG. 3 by the frictional force with the kneading roller (4).

The ink in the ink fountain (1) exits on the surface of the original roller (3) through the gap between the ink fountain (1) and the adjusting plate (2). At this time,
By adjusting the size of the gap between the original roller (3) and the adjusting plate (2), the film thickness of the ink that appears on the surface of the original roller (3), that is, the ink amount can be adjusted. Former roller (3)
The ink on the surface of the transfer roller (5) is transferred to the transfer roller (5) while the transfer roller (5) is switched to the first position, and the ink transferred to each transfer roller (5) is transferred to the transfer roller (5). While (5) is being switched to the second position, it is transferred to the kneading roller (4). Then, the control circuit (26) controls the time during which each calling roller (5) is switched to the first position and the second position, so that the amount of ink supplied to the printing surface varies depending on the position in the width direction. Adjusted.

FIG. 4 shows an embodiment different from the above,
The same parts as those in the above embodiment are designated by the same reference numerals.

In this case, the ends of adjacent calling rollers (5) are integrally connected to each other by a thin flexible tube portion (27) at the outer peripheral portion. Flexible tube (27) is the calling roller
It may be formed integrally with (5), or by forming a plurality of rubber thick cylindrical members inside a long flexible rubber tube to form the calling roller (5) and the flexible tubular portion (27). You may do it. Since the ends of the adjacent calling rollers (5) are connected by the tubular portion (27), ink does not enter between the calling rollers (5). Moreover, the tube part (27)
Since it is thin and flexible, it does not prevent each paging roller (5) from individually switching between the first position and the second position. Others are the same as the above-mentioned embodiment.

The configuration of each part of the ink supply device is not limited to that of the above-mentioned embodiment, but can be changed appropriately. In the above embodiment, the calling roller (5) is in contact with the original roller (3) and is separated from the kneading roller (4) and in the position where it is in contact with the kneading roller (4) and is separated from the original roller (3). Although it can be switched, the present invention is disclosed in, for example, Japanese Unexamined Patent Publication No. 2-30143.
As described in Japanese Patent Publication No. 9 and the like, an ink supply device capable of switching between a position in contact with an ink source roller and a position away from the ink source roller in a state where an ink feeding roller is always in contact with an ink mixing roller. Can also be applied to.

[0019]

As described above, according to the ink supply device of the printing machine of the present invention, it is necessary to provide a member such as a conventional swing arm for switching the position of the ink feeding roller on the outside of the ink feeding roller. Since there is no ink, the installation space for the ink feeding roller is small.

Since the ends of the adjacent ink calling rollers are integrally connected by the thin-walled flexible tube portion, the ink calling rollers can be mutually switched to two positions without hindering the switching between the two positions. It is possible to prevent ink from getting in the gap.

[Brief description of drawings]

FIG. 1 is a schematic side view of an ink supply device of a printing machine showing an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a portion of the ink dispensing roller of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a partially cutaway front view of an ink feeding roller portion of an ink supply device of a printing press showing another embodiment of the present invention.

[Explanation of symbols]

 (3) Ink source roller (4) Ink mixing roller (5) Ink feeding roller (6) Frame (7) Support member (8) Movable member (10) Hole (14) Switching device

Claims (2)

[Claims] 1. An ink source roller and an ink kneading roller, which are supported by a frame so as to be parallel to each other, between a plurality of ink feeding rollers divided in the axial direction of the rollers. In an ink supply device of a printing machine, which is arranged so that each ink feeding roller is individually switched to two positions between the ink source roller and the ink kneading roller so that the contact state with the ink source roller and the ink kneading roller is changed, A plurality of short columnar movable members are fitted into a square columnar support member fixed to a frame so as to form a gap in one width direction of the support member. Ink replenishing rollers are rotatably attached to the outside of each of the movable members, and the movable members are moved in the width direction of the supporting member at a portion between each movable member and the supporting member. An ink supply device for a printing press, which is provided with a switching device for individually switching the position of the calling roller. 2. The ink supply device for a printing press according to claim 1, wherein the end portions of adjacent ink feeding rollers are integrally connected by a thin flexible cylinder portion.