WO1994022672A1

WO1994022672A1 - Ink supplying apparatus of printer

Info

Publication number: WO1994022672A1
Application number: PCT/JP1993/000388
Authority: WO
Inventors: Masayuki Izume
Original assignee: I. Mar Planning Inc.
Priority date: 1992-01-10
Filing date: 1993-01-23
Publication date: 1994-10-13
Also published as: JP2866997B2; AU3768193A; JPH0671863A

Abstract

There are provided between an ink fountain roller and an ink distributing roller so supported by frames to be mutually in parallel, a plurality of ink ductors divided in the axial direction of these rollers are arranged at intervals in the axial direction in such a manner that each of the ink ductors is individually switched over to one of the two positions between the ink fountain roller and the ink distributing roller to vary its state of contact with those rollers. A fixed shaft secured to the frames passes the inner side of the ink ductors at intervals in the radial direction. A permanent magnet is provided on the inner wall of each ink ductor. A magnet device including an electromagnet is provided on the surface of the fixed shaft inside each of the ink ductors. In a state that the permanent magnet of each ink ductors and each of the magnet devices on the fixed shaft are mutually faced and spaced in the radial direction at given intervals, by switching the electromagnet of each magnetic device, the ink ductors are switched over between the two positions individually.

Description

Description Ink supply device for printing press Technical field

The present invention relates to an ink supply device for a printing press, and more particularly, a plurality of ink retrieving rollers arranged in the axial direction of these rollers between an ink source roller and an ink kneading roller. Ink of a printing press in which each ink feed roller is individually switched to two positions between these rollers so as to change the contact state with the ink source roller and the ink mixing roller. It relates to a supply device. Background technology

As an ink supply device for this type of printing press, each ink inking roller is rotatably mounted on the swing end of the swing arm, and the swing arm is moved by an air cylinder or the like. Switches between the first position, which is in contact with the ink source roller and is separated from the ink mixing roller, and the second position, which is in contact with the ink mixing roller and is separated from the ink source roller. It is known that something has been done.

However, the conventional ink supply device as described above has a problem that a plurality of swing arms are required to switch the position of the ink retrieving roller, and a large installation space is required. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide an ink supply apparatus for a printing press which requires a small installation space for an ink inlet port. Disclosure of the invention

The ink supply device for a printing press according to the present invention includes:

A plurality of ink retrieving rollers divided in the axial direction of these rollers are arranged at intervals in the axial direction between the roller and the ink mixing roller, which are supported by the frame so that they are parallel to each other. A printing press system that is arranged so that each ink pick-up roller can be individually switched to two positions between these rollers so as to change contact with the ink source roller and the ink milling roller. In the feeder,

A fixed shaft fixed to the frame passes radially inside a plurality of cylindrical ink inking rollers, and a permanent magnet is provided on the inner periphery of each of the ink inking rollers. Magnet devices including electromagnets are respectively provided on the outer periphery of the fixed shaft inside the ring roller, and by switching the energization state of the electromagnet of each magnet device, the permanent magnet of each ring roller and each magnet device of the fixed shaft are connected to each other. In this state, the respective ink inking rollers can be individually switched to two positions in a state in which they face each other at a predetermined interval in the radial direction.

The ends of adjacent ink call rollers may be integrally connected by a thin flexible tubular portion.

Cylindrical permanent magnets are fixed to the inner periphery of each ink call roller The magnet device is composed of a substantially cylindrical permanent magnet fixed to the outer periphery of the fixed shaft, a part of which is cut away, and an electromagnet fixed to the outer periphery of the fixed shaft at the part where the permanent magnet is cut. In some cases, the position of the ink recall roller can be switched by switching between a state in which the energization of the electromagnet is stopped and a state in which the electromagnet is energized.

Cylindrical positioning permanent magnets are fixedly provided outside the ink recall rollers at both ends in the axial direction, and the repulsive force between the permanent magnets of the ink recall rollers and the repulsive force from the positioning permanent magnets are provided. May cause the ink recall roller to be positioned in the axial direction.o

A fixed shaft fixed to the frame is passed through a plurality of cylindrical ink retrieving rollers, and a permanent magnet and a magnet device are provided on the inner peripheral portion of each of the ink retrieving rollers and the outer peripheral portion of the fixed shaft on the inner side. It is only provided, and there is no need to provide a member for switching the position of the ink call roller such as a conventional swing arm outside the ink call roller. For this reason, it is sufficient that there is sufficient space between the ink source roller and the ink kneading roller to provide the ink retrieving roller, and the installation space for the ink retrieving roller is small. When the ink recall roller comes into contact with the ink source roller or the ink kneading roller, it is rotated by frictional force with the roller, but the ink recall roller and the permanent magnet do not contact the fixed shaft and the magnet device. Therefore, the rotation resistance of the ink retrieving roller is very small.

The end of the adjacent ink call roller is formed by a thin flexible cylinder. If they are integrally connected to each other, it is possible to prevent the ink from entering between the ink calling rollers by the cylindrical portion. In addition, since the cylindrical portion is thin and flexible, it does not prevent the calling roller from being individually switched to two positions.

A cylindrical permanent magnet is fixed to the inner peripheral portion of each of the ink recall rollers, and the magnet device is composed of a substantially cylindrical permanent magnet fixed to the outer peripheral portion of the fixed shaft and partially cut away. An electromagnet fixed to the outer periphery of the notched portion of the fixed shaft is provided, and by switching between a state in which energization to the electromagnet is stopped and a state in which electromagnet is energized, the position of the ink recall roller is changed. If it is configured to be switched, the power supply to the electromagnet is stopped when the ink recall roller is switched to one of the two positions. The heat generated by the electromagnet can be reduced.

Cylindrical positioning permanent magnets are fixedly provided outside the ink recall rollers at both ends in the axial direction, and the repulsive force between the permanent magnets of the ink recall rollers and the repulsive force from the positioning permanent magnets are provided. Accordingly, if the ink call roller is positioned in the axial direction, the ink call roller can be positioned in a non-contact state in the axial direction, and the rotational resistance of the roller is further reduced. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a vertical sectional view of an ink supply device of a printing press showing an embodiment of the present invention. FIG. 2 is a horizontal cross-sectional view of a portion of the ink feeding roller of FIG. FIG. 3 is a mark showing another embodiment of the present invention. FIG. 2 is a horizontal sectional view of a portion of an ink supply roller of an ink supply device of the printing press. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 and 2 show an example of an ink supply device for a printing press.

The ink source roller (3) close to the ink volume adjustment plate (doctor blade) (2), which forms the bottom of the ink jar (1), and the first ink kneading roller among multiple ink kneading rollers Between the roller (4) and the rollers (3) and (4), a plurality of ink recall rollers (5) divided in the axial direction are arranged at intervals in the axial direction. The main roller (3) and the kneading roller (4) are rotatably supported by the frame (6) of the printing press so as to be parallel to each other, and are driven at a predetermined rotational speed synchronized with each other by a driving device (not shown). To rotate in the direction of the arrow in Fig. 1.

The ring roller (5) is formed in a thick cylindrical shape with rubber or the like, and is fixed to the frame (6) so as to be parallel to the original roller (3) and the kneading roller U). Are radially spaced inside the ring roller (5). A cylindrical permanent magnet (8) is fixed to the inner periphery of each ring roller (5). The fixed shaft (7) has a circular cross-sectional shape, and both ends are fixed to the frame (6). A magnet device (9) is attached to the outer periphery of the fixed shaft (7) inside each ring roller (5). , Respectively. The magnet device (9) is composed of an electromagnet (.10) and a substantially cylindrical permanent magnet (11). A sleeve (12) and a permanent magnet (11) having the same diameter are alternately fitted around the fixed shaft (7), whereby the permanent magnet (11) is positioned and fixed. The part of the permanent magnet (11) on the side of the base roller (3) is cut out, and the electromagnet (10) is fixed to the outer periphery of the fixed shaft (7) in this part. The permanent magnet (11) and the electromagnet ( 10) and have a cylindrical shape. The outer diameter of the magnet device (9) of the fixed shaft (7) is much smaller than the inner diameter of the permanent magnet (8) of the ring roller (5), and there is a radial gap between them. Then, the call roller (5) can move freely with respect to the fixed shaft i). The electric wire (13) of each electromagnet (10) is drawn out of the fixed shaft (7) through the hole (14) formed in the fixed shaft (7), and connected to the control circuit (回路). I have. A thick cylindrical support member (16) is fixed to the outer peripheral surface of the sleeve (12) between the call roller (5) and the frame (6) at both ends, and is attached to the outer peripheral surface of the support member (16). A cylindrical positioning permanent magnet (Π) having the same diameter as the permanent magnet (8) of the ring roller (5) is fixed. Each of the permanent magnets (8) (11) (Π) has magnetic poles on the inner and outer peripheral surfaces, and the permanent magnets (8) of the ring roller (5) exert repulsive forces on each other, and the magnet device (9) These polarities are determined so as to receive repulsion from the permanent magnet (11) and the positioning permanent magnet (17). In this example, the inner periphery of the permanent magnet (8) of the ring roller (5) and the permanent magnet for positioning (Π) are the N pole, the outer periphery is the S pole, and the permanent magnet (11) of the magnet device (9) The outer surface has N pole and the inner surface has S pole. The repulsive force of the permanent magnets (8) of the call roller (5) and the repulsive force of the positioning permanent magnets (17) ensure that each call roller (5) is positioned outside the corresponding magnet device (9). The permanent magnet (8) and each magnet device (9) are separated by a predetermined distance in the radial direction by switching the energization state of the electromagnet (10) as follows. In a state in which the ringing roller (5) is in contact with the former roller (3) and is separated from the kneading roller U), the first position is in contact with the former roller (3) and is separated from the former roller (3). It is switched to the second position. The electromagnet (10) is switched between a state in which energization is stopped (off state) and a state in which energization is performed (on state) such that the outer periphery has N poles and the inner periphery has S poles. When the electromagnet (10) is switched to the off state, the retrieving roller (5) is switched to the second position and pressed against the kneading roller (4) as shown by the solid line in FIG. At this time, the repulsive force of the permanent magnet (8) of the ring roller (5) and the permanent magnet (1 1) of the magnet device (9) balances the pressure from the kneading roller (4), and the ring roller (5) The permanent magnet (8) is held away from the magnet device (9) and the sleeve (12) on the fixed shaft (7), and is rotated in the direction of the arrow in Fig. 1 by the frictional force with the kneading roller (4). Let me do. When the electromagnet (10) is switched to the ON state, the permanent magnet (8) of the call roller (5) receives a large repulsive force from the electromagnet (10) toward the original roller (3), and the call roller is turned. (5) moves to the original roller (3) side. As a result, as shown by the dashed line in FIG. 1, the ring roller (5) is switched to the first position and pressed against the original roller (3). At this time, the permanent magnet (8) of the ring roller (5) and the permanent magnet (1 1) of the magnet device (9) and the The repulsion force with the magnet (10) approximately matches the pressure from the original roller (3), and the ring roller (5) and the permanent magnet (8) are fixed to the magnet unit (9) and the slot of the fixed shaft (7). It is kept away from the drive (12) and rotated in the direction of the arrow in Fig. 1 by the frictional force with the original roller (3). When the electromagnet (10) is switched off, the ring roller (5) returns to the second position. In both the first position and the second position, the ringing roller (5) and the permanent magnet (8) are held in a non-contact state with the fixed shaft (7) and the magnet device (9). Roller (5) has very low rotational resistance.

The ink in the ink jar (1) passes through the gap with the adjustment plate (2) and emerges from the surface of the original roller (3). At this time, by adjusting the size of the gap between the original roller (3) and the adjusting plate (2), it is possible to adjust the thickness of the ink that emerges on the surface of the original roller (3), that is, the ink amount. it can. The ink that has come out of the surface of the original roller (3) is transferred to the caller (5) while the caller (5) is switched to the first position, and the caller (5) is moved to the first position. The ink transferred to (1) is moved to the kneading roller (2) while the call roller (5) is switched to the second position. Then, the control circuit (15) controls each call roller (5). By controlling the time during which the first position and the second position are switched, the amount of ink supplied to the printing surface is adjusted by the position in the width direction.

FIG. 3 shows an embodiment different from the above, and the same reference numerals are given to the same parts as the above embodiment.

In this case, the ends of the adjacent call rollers (5) are integrally connected by a thin flexible tubular portion (18) at the outer periphery. I have. The flexible cylindrical portion (18) may be formed integrally with the call roller (5), or a plurality of thick rubber cylindrical members may be fixed inside the long rubber flexible tube to make the call roller (5). 5) and the flexible tubular portion (18) may be formed. Since the ends of the adjacent call rollers (5) are connected by the cylindrical portion (18), ink does not enter between the call rollers (5). Moreover, since the cylindrical portion (18) is thin and flexible, it does not prevent each of the ringing rollers (5) from being individually switched to 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-described embodiment, and can be appropriately changed. For example, in the above embodiment, only one cylindrical permanent magnet (8) is provided in the ring roller (5). However, a plurality of block-shaped permanent magnets are circled by the ring roller (8). It may be arranged in the circumferential direction. The same applies to the permanent magnet (11) and the permanent magnet for positioning (Π) of the magnet device (9). Further, in the above embodiment, the magnet device (9) of the fixed shaft (7) includes the electromagnet (10) and the permanent magnet (U), and the electromagnet (1) is used when the ring roller (5) is switched to the second position. Since the power supply to the electromagnet (10) is stopped, there is an advantage that the heat generated by the electromagnet (10) is reduced.However, only the electromagnet is provided in the fixed shaft magnet device, and the polarity of this electromagnet is reversed. The energizing state may be switched so that the call roller is switched to two positions. Furthermore, in the above embodiment, the ringing roller (5) comes into contact with the original roller (3) and is separated from the kneading roller U), and contacts the kneading roller (4) with the original roller (3). Switch to a remote position However, as described in, for example, Japanese Patent Application Laid-Open No. 2-31039, the present invention is based on the condition that the ink feeding roller is always in contact with the ink mixing roller. Industrial applicability that can be applied to an ink supply device that can be switched between a position in contact with the ink source roller and a position away from the ink source roller

In an ink supply device for a printing press according to the present invention, a plurality of ink retrieving rollers divided in the axial direction of these mouth rollers are arranged between an ink source roller and an ink mixing roller. Used in presses where the ink feed roller is individually switched to two positions between the ink source roller and the ink milling roller in such a way that the contact state with these rollers changes. Suitable for.

Claims

The scope of the claims

1. Between the ink source roller and the ink mixing roller supported by the frame so as to be parallel to each other, a plurality of ink retrieving rollers divided in the axial direction of these rollers are spaced apart in the axial direction. It is arranged so that it can be switched separately to two positions between these rollers so that the contact state with the ink source roller and the ink mixing roller can be changed. In the ink supply device of the printing press,

A fixed shaft fixed to the frame is passed radially inside a plurality of cylindrical ink retrieving rollers, and a permanent magnet is provided on an inner peripheral portion of each of the ink retrieving rollers. Magnet devices including electromagnets are provided on the outer periphery of the fixed shaft inside the ringing roller, and by switching the energization state of the magnets of each magnet device, the permanent magnet of each ringer and each magnet device of the fixed shaft are connected. An ink supply device for a printing press, characterized in that each ink feed roller can be individually switched to two positions in a state where the rollers face each other at predetermined intervals in the radial direction.

2. An ink supply device for a printing press according to claim 1, wherein the ends of adjacent ink call rollers are integrally connected by a thin-walled flexible tubular portion. .

3. A cylindrical permanent magnet is fixed to the inner peripheral portion of each ink recall roller, and the magnet device is composed of a substantially cylindrical permanent magnet fixed to the outer peripheral portion of the fixed shaft and partially cut away. Is the permanent magnet notched? An electromagnet fixed to the outer periphery of the fixed shaft at the part where the power is supplied to the electromagnet is switched to a state in which energization of the electromagnet is stopped and a state in which the electromagnet is energized so that the position of the ink recall roller can be switched The ink supply device for a printing press according to claim 1, wherein the ink supply device is configured to:

4. Cylindrical positioning permanent magnets are fixedly provided on the outer sides of the ink recall rollers at both ends in the axial direction, and the repulsive force between the permanent magnets of the ink recall rollers and the position of the permanent magnets. 4. The ink supply device for a printing press according to claim 3, wherein the ink recall roller is positioned in the axial direction by the repulsive force.

5. A cylindrical permanent magnet is fixed to the inner periphery of each ink recall roller, and the magnet device is composed of a substantially cylindrical permanent magnet fixed to the outer periphery of the fixed shaft and partially cut away. An electromagnet fixed to the outer periphery of the fixed shaft where the permanent magnet is notched is provided, and by switching between a state in which energization to the electromagnet is stopped and a state in which electromagnet is energized, the position of the ink recall roller 3. The ink supply device for a printing press according to claim 2, wherein the ink supply device is switched.

6. Cylindrical positioning permanent magnets are fixedly provided axially outside the ink recall rollers at both ends, and the repulsive force between the permanent magnets of the ink recall rollers and the permanent magnets from the positioning permanent magnets. 6. The ink supply device for a printing press according to claim 5, wherein the ink recall roller is positioned in the axial direction by the repulsive force.