JPH09141833A - Ink supply device of printing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a significant impact from being inflicted to an ink fountain roller when an ink duct roller is switched to an ink ducting position. SOLUTION: Plural ink duct rollers 13 are arranged at an interval in the longitudinal direction of an ink fountain roller 3, in proximity to the ink fountain roller 3 of an ink fountain 1, and each of the ink duct rollers 13 is individually switched to an ink ducting position set in contact with the ink fountain roller 3 and an ink-non-ink ducting position remote from the ink fountain roller 3. An ink is ducted by switching the specified ink duct roller 13 to the ink ducting position at a specified ducting interval, and the amount of an ink ducted to the ink duct roller 13 is controlled by controlling the rate of switching frequency to the ink ducting position per duct roller 13. In order to prevent all the ink duct rollers 13 from being switched to the ink ducting position simultaneously, the ink duct rollers 13 are switched to the ink ducting position at mutually different time from each other.

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 kneading roller in the axial direction of these rollers. The present invention relates to an ink supply device for a printing press, wherein each ink calling roller is individually switched to a calling position where it contacts the ink source roller and a non-calling position where it separates from the ink source roller.

[0002]

2. Description of the Related Art As an ink supply device for a printing machine of this type, there are known ink supply devices disclosed in, for example, JP-A-6-71862 and JP-A-6-71863. Has been.

In these conventional ink supply devices, a linear support member parallel to the ink source roller and the ink kneading roller is passed inside the plurality of ink feeding rollers, and each ink feeding roller is attached to the supporting member. Freely rotatable,
And to be able to move in a plane orthogonal to the axial direction,
By a position switching device provided around the support member, a calling position that comes in contact with the ink source roller and leaves the ink kneading roller, and a non-calling position that comes in contact with the ink kneading roller and leave the ink origin roller It is designed to be switched to. The ink source roller forms an ink fountain with an ink amount adjusting plate (doctor blade), and is continuously rotated at a predetermined rotation speed. With this rotation, the ink in the ink fountain Gap between the original roller and the ink amount adjusting plate (ink passage)
It goes through to the surface of the ink source roller. The ink kneading roller is continuously rotated at a predetermined rotation speed synchronized with the rotation of the ink source roller. The ink feeding roller comes into contact with the ink source roller or the ink kneading roller and is driven to rotate by friction, and while the ink feeding roller is being switched to the calling position, the ink is transferred from the ink source roller to the ink feeding roller. While the calling roller is switched to the non-calling position, the ink is transferred from the ink calling roller to the ink kneading roller, and the ink transferred to the ink kneading roller is further supplied to the printing surface via the plurality of ink kneading rollers. It has become. And for each ink feeding roller,
By individually controlling the ratio of switching to the call position, the amount of ink transferred from the ink source roller to the ink kneading roller to the ink kneading roller can be controlled for each ink calling roller, and as a result, it is supplied to the printing surface. The ink amount can be controlled to a desired value for each ink feeding roller, that is, for each position in the width direction of the printing surface. The ink amount is set for each ink calling roller, all the ink calling rollers are switched to the calling position at the same time with a fixed calling interval, and then the ratio of switching to the calling position is set for each ink calling roller. The non-calling position can be switched to a value corresponding to the amount of ink that has been ejected.

In the conventional ink supply device as described above,
Since all the ink feeding rollers are switched to the feeding position at the same time and collide with the ink origin roller, a large radial impact force acts on the ink origin roller at this time, and this causes the ink origin roller, its supporting mechanism and drive mechanism. There is a problem that it adversely affects, for example. There is also a problem that the ink source roller is bent due to the impact force, which changes the size of the ink passage between the ink amount adjusting plate and the ink amount, and the amount of ink that appears on the surface of the ink source roller also changes.

Further, in the conventional device as described above, each ink feeding roller is in a calling position where it comes into contact with the ink origin roller and separates from the ink mixing roller, and a non-calling location where it comes into contact with the ink mixing roller and separates from the ink mixing roller. Since the position is switched to the position, there is a problem that a large amount of ink cannot be transferred from the ink source roller to the ink kneading roller, as described below.

That is, since the ink feeding roller alternately contacts the ink origin roller and the ink kneading roller and cannot contact both at the same time, when the ink is being transferred from the ink origin roller to the ink feeding roller, the ink feeding roller is in contact. The ink cannot be transferred from the ink mixing roller to the ink mixing roller, and conversely, when the ink is transferred from the ink feeding roller to the ink mixing roller, the ink cannot be transferred from the ink source roller to the ink transfer roller. Therefore, the ratio of the time that ink can be transferred from the ink source roller to the ink kneading roller to the total operating time is
The maximum is 1/2. Therefore, in the case of light weight printing using a small amount of ink, sufficient ink can be supplied. However, in the case of heavy weight printing using a large amount of ink, the required amount of ink cannot be supplied, and the ink density does not appear. In addition, there is a big problem that the print finish becomes poor. Also,
When the printing speed is high, there is a problem that the ink supply amount is insufficient even in lightweight printing.

Further, in the conventional device as described above, since the ink calling roller for which the set value of the ink amount is not 0 is called every time the calling interval is reached, as described below, a minute amount of ink is generated. There is a problem that it cannot be controlled.

That is, since the surface portion of the ink feeding roller is made of an elastic material such as rubber, it comes into contact with the ink source roller with a certain width (contact width) in the circumferential direction. Even if a command is issued to bring the ink recalling roller into contact with the ink source roller and immediately release it, the ink recalling roller must be activated due to the response time of the actuator such as the solenoid for switching the position of the ink recalling roller. It cannot be separated from the ink source roller immediately. For this reason,
When the calling operation is performed once, the ink calling roller always receives a certain amount of ink or more. When the ink amount which is called by the ink feeding roller while the ink feeding roller is in contact with the ink source roller for the minimum time is called the minimum calling ink amount, for example, with respect to the set value of the ink amount of 100%, As a result, the minimum amount of calling ink may be about 5%. In such a case, even if the ink amount of less than 5% is set, 5% or more of the ink is always recalled, and the ink amount of less than 5% cannot be controlled.

Further, in the conventional ink supply device as described above, each ink feeding roller can be individually switched between the calling position and the non-calling position, but each ink feeding roller rotates independently. , There are the following problems.

As described above, the ink feeding roller comes into contact with the ink origin roller or the ink kneading roller and is driven to rotate by friction, but slip occurs between the ink feeding roller and the ink origin roller or the ink kneading roller. Occasionally, the slip rate depends on frictional force or contact pressure. Further, it is very difficult to bring all the ink feeding rollers into contact with the ink source roller or the ink kneading roller with equal pressure because of manufacturing errors and assembly errors. Therefore, the slip ratio between the ink feeding roller and the ink kneading roller differs depending on the ink feeding roller, which may cause a difference in rotational speed between the ink feeding rollers. When a difference in rotational speed occurs between the ink feeding rollers in this way, the amount of ink transferred from the ink source roller to the ink kneading roller by the ink feeding roller fluctuates, and the amount of ink supplied to the printing surface is changed. It becomes difficult to accurately control the desired value for each ink feeding roller.

An object of the present invention is to provide an ink supply device for a printing machine in which a large impact force does not act on the ink source roller when the ink calling roller is switched to the calling position.

Another object of the present invention is to provide an ink supply device for a printing machine, which can transfer a large amount of ink from an ink source roller to an ink kneading roller as needed.

An object of the present invention is also to provide an ink for a printing press capable of controlling an ink amount smaller than the minimum amount of ink to be called by the ink feeding roller while the ink feeding roller is in contact with the ink source roller for a minimum time. It is to provide a supply device.

Another object of the present invention is to control the ink amount smaller than the minimum amount of ink to be called by the ink feeding roller while the ink feeding roller is in contact with the ink feeding roller for a minimum time, and at the same time, to control the ink source. A large amount of ink can be transferred from the roller to the ink kneading roller as needed, and moreover, an ink feeding method that allows fine control of the ink amount between this minute ink amount and a large amount of ink for each ink feeding roller To provide.

Another object of the present invention is to provide an ink supply device for a printing press, which can surely switch the position of the ink feeding roller.

Another object of the present invention is to provide an ink supply device for a printing machine, which requires very little rotation resistance of the ink feeding roller and requires no maintenance.

Another object of the present invention is to provide an ink supply device for a printing machine, which is capable of individually switching the positions of the respective ink feeding rollers and capable of always rotating the respective ink feeding rollers at mutually equal rotational speeds. To provide.

[0018]

The ink supply device for a printing press according to the present invention is provided with a plurality of ink feeding devices which are divided in the longitudinal direction of the ink fountain roller in the vicinity of the ink fountain roller of the ink fountain. Rollers are arranged so that each ink calling roller can be switched individually between a calling position where it comes into contact with the ink source roller and a non-calling position where it separates from the ink source roller. By switching the calling roller to the calling position to call the ink, and controlling the ratio of switching to the calling position for each ink calling roller, the amount of ink called to the ink calling roller is controlled. In the ink supply device, ink is called so that all the ink calling rollers are not switched to the calling position at the same time. It is characterized in that the timing for switching the roller to the calling position is shifted.

The ink that has flowed from the ink fountain to the surface of the ink source roller through the ink passage is transferred to the ink recalling roller while the ink recalling roller is being switched to the recalling position, and to each ink recalling roller. The formed ink is transferred to the ink kneading roller. Then, for each ink feeding roller, by individually controlling the proportion switched to the feeding position, the amount of ink transferred from the ink source roller to the ink kneading roller via the ink feeding roller is controlled for each ink feeding roller, as a result,
The amount of ink supplied to the printing surface is controlled to a desired value for each ink feeding roller, that is, for each position in the width direction of the printing surface.

Since the timing of switching the ink calling roller to the calling position is shifted, and all the ink calling rollers are not switched to the calling position at the same time, the ink source rollers are switched when the respective ink calling rollers are switched to the calling position. No large impact force is applied to. Therefore, the ink source roller, its support mechanism, the drive mechanism, and the like are less likely to be adversely affected by the impact force, and the impact source force is less likely to bend. Therefore, it is less likely that the size of the ink passage between the ink amount adjusting plate and the ink amount adjusting plate will change and the amount of ink that appears on the surface of the ink source roller will also change.

The timing of switching the ink calling rollers to the calling positions may be shifted so that all the ink calling rollers are not switched to the calling positions at the same time, and it is not always necessary to switch all the ink calling rollers to the calling positions at different timings. . However, it is desirable to switch all the ink feeding rollers to the calling positions at different timings, and it is further desirable to switch to the calling positions one by one at equal intervals.

The control of the rate at which the ink feeding roller is switched to the feeding position can be performed on the basis of an arbitrary value such as time and the rotation amount (rotation angle) of the ink source roller. When the time is used as a reference, the time during which the ink calling roller is switched to the calling position is controlled with respect to the calling interval time. When the rotation amount of the ink source roller is used as a reference, for example, the ink feeding roller is set so that the rotation angle of the ink source roller becomes a value corresponding to the ink amount setting value while the ink feeding roller is switched to the calling position. Control the switching of the position of.

Preferably, each ink feeding roller can be switched between a calling position and a non-calling position while always in contact with the ink mixing roller.

In this case, the ink ejected from the ink fountain to the surface of the ink source roller is transferred to the ink kneading roller which is always in contact with the ink. Since each ink feeding roller is always in contact with the ink kneading roller, it is in contact with both the ink kneading roller and the ink source roller at the same time when switched to the calling position. Since each ink feeding roller can simultaneously contact both the ink kneading roller and the ink feeding roller in this way, the total time for transferring the ink from the ink feeding roller to the ink feeding roller via the ink feeding roller is reduced. The ratio to the operating time can be set to 1 at the maximum, and a large amount of ink can be transferred from the ink source roller to the ink kneading roller as needed. Therefore, it is possible to prevent the ink supply amount from becoming insufficient even in the case of heavy-duty printing or high-speed printing.

For example, the ink amount is set for each ink feeding roller, and by controlling the ratio of switching to the calling position according to the set ink amount for each ink feeding roller, the ink calling to the ink feeding roller is controlled. The amount of ink is controlled so that an ink amount smaller than the minimum recall ink amount that is called by the ink recall roller while the ink recall roller is in contact with the ink source roller for the minimum time is set as the minimum set value. For ink refill rollers with a smaller ink replenishment amount, set the ink replenishment amount for one replenishment operation to the minimum replenishment ink amount or more, and set the replenishment interval for each replenishment period according to this single ink replenishment amount and ink amount set value. The number of calls is reduced as compared with the case of calling every time.

In this case, with respect to the ink calling roller in which the ink amount is set to the minimum calling ink amount or more, it is switched to the calling position every time the calling interval is reached, and the ratio of switching to the calling position is controlled to control the ink. The amount of ink transferred to the kneading roller is finely controlled. For ink refill rollers with an ink amount less than the minimum refill ink amount, the ink replenishment amount per time is greater than or equal to the minimum replenishment ink amount, and therefore is larger than the set value, but the number of replenishment times is reduced. If the average of a plurality of times is taken, the ink amount per time can be made smaller than the minimum recall ink amount, and can be set to a value close to or a set value. Therefore, it is possible to control a minute ink amount which is smaller than the minimum recall ink amount. If each ink feeding roller is always in contact with the ink kneading roller as described above, the ink amount is finely adjusted between the minute ink amount and the large amount of ink for each ink feeding roller. You can control.

For example, a linear support member parallel to the ink source roller is passed through the inside of the ink feeding roller, and each ink feeding roller is rotatable with respect to the supporting member.
And to be able to move in a plane orthogonal to the axial direction,
It is arranged around the support member and each ink feeding roller is
The position switching means provided in each of them is adapted to switch between a calling position and a non-calling position in a plane orthogonal to the axial direction.

In this case, only a plurality of ink feeding rollers are arranged around the linear supporting member, and the position switching means can be provided in the portion between the supporting member and each ink feeding roller. It is not 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. For this reason, it is sufficient to provide 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 can be small.

In the above case, for example, the supporting member has a prismatic shape, and in this supporting member, the angular holes formed in the plurality of movable members having a short cylindrical shape form a gap in one width direction of the supporting member. So that the movable member can move in the width direction with respect to the supporting member, and the ink recalling roller is rotatably attached to the outside of each movable member. Position switching means are respectively provided between and. If you do this,
By moving each ink feeding roller along the prismatic support member, the position can be surely switched. In this case, for example, each position switching means is provided on the support member, an elastic member for urging the movable member to one side in the width direction, a cylinder portion formed on the support member,
Provided on the support member and a piston that is slidably inserted into the cylinder portion and moves the movable member to the opposite side in the width direction against the biasing force of the elastic member when compressed air is supplied to the cylinder portion. And a valve for supplying compressed air to the formed cylinder portion. With this configuration, the position of the ink feeding roller can be easily and surely switched by only operating the valve. Preferably, the elastic member is
The hole is formed in a hole formed in the support member, and the center line of the hole and the center line of the cylinder portion are in a straight line passing through the center line of the movable member and orthogonal to the center line. By doing so, the movement of the ink retrieving roller by the piston and the elastic member is very smooth, and the time required for position switching is extremely short.

Further, in the above case, for example, a cylindrical support member is passed inside the plurality of ink feeding rollers at intervals in the radial direction, and each position switching means is provided on the inner peripheral portion of the ink feeding roller. Permanent magnet and a supporting member of the ink feeding roller by switching the energization state of the electromagnet of the magnetic device. The position of the ink feeding roller can be switched in a state where the magnet unit and the magnet device face each other at a predetermined interval in the radial direction. With this configuration, the ink replenishing roller is rotatably supported around the support member in a non-contact state, so that the rotation resistance of the ink replenishing roller becomes very small, and the support member and the ink replenishing roller contact each other. Since there are no parts that rotate relative to each other, there is no need for their maintenance. In this case, for example, the permanent magnet provided on the ink feeding roller has a cylindrical shape, and the magnet device has a substantially cylindrical permanent magnet fixed to the outer peripheral portion of the support member and having a substantially notched shape, and the permanent magnet. Is provided with an electromagnet fixed to the outer peripheral portion of the notched portion of the support member, and the position of the ink feeding roller can be switched by switching between a state in which energization to the electromagnet is stopped and a state in which the electromagnet is energized. ing. By doing so, the position of the ink feeding roller can be reliably switched by switching the energization state of the electromagnet.

For example, a connecting member is provided between the end faces of the adjacent ink-feeding rollers, which allows relative movement in the plane orthogonal to the axial direction of two adjacent ink-feeding rollers but prevents relative movement in the circumferential direction. It is provided.
In this case, a connecting member is provided between the adjacent ink feeding rollers, but since the connecting member allows relative movement within a plane orthogonal to the axial direction of the two adjacent ink feeding rollers, The connection member does not prevent the individual switching of the positions in the plane orthogonal to the axial direction of each ink feeding roller. Further, since the connecting member prevents the relative movement of the two adjacent ink feeding rollers in the circumferential direction, all the ink feeding rollers rotate integrally at the same rotation speed. Therefore, the position of each ink feeding roller in the direction orthogonal to the axial direction can be individually switched, and there is no difference in rotational speed between the ink feeding rollers. Can be rotated at speed. Therefore, the above-mentioned problem caused by the difference in the rotation speed between the ink feeding rollers is solved. The connecting member only needs to allow relative movement within a plane orthogonal to the axial direction of the two adjacent ink feeding rollers, and its shape and configuration are arbitrary. For example, the connecting member may be a perforated circle. It is formed in a plate shape. By doing so, the mutual spacing of the ink feeding rollers becomes small, and the plurality of ink feeding rollers become small in size as a whole. In this case, for example, between the two symmetrical points on the first diameter of the connecting member and the end surface of the one ink inquiring roller opposite thereto, the one inking roller and the first diametrical direction of the connecting member. Is provided with a first guide means for permitting only relative movement of the connecting member, and two symmetrical points on the second diameter orthogonal to the first diameter of the connecting member and the end surface of the other ink-feeding roller facing the two symmetrical points. In between, there is provided a second guide means which allows only the second relative movement of the other ink-feeding roller and the connecting member in the second diametrical direction. With this arrangement, one ink feeding roller is firstly connected to the connecting member.
Of the two ink-feeding rollers adjacent to each other in the plane orthogonal to the axial direction of the two ink-feeding rollers adjacent to each other. It is possible to move. The first and second guide means may be any means as long as they allow only the relative movement of the ink feeding roller and the connecting member in the diametrical direction, and the configuration thereof is arbitrary. It is composed of a diametrical elongated hole formed and a pin-shaped portion formed in the end surface of the ink inking roller and fitted in the elongated hole of the connecting member so as to be movable only in the diametrical direction. In this way, the structure of the guide means is simple. Instead of the long hole, the connecting member may be provided with a slit or a groove similar thereto. Further, a groove or the like may be provided on the end surface of the ink feeding roller, and the pin-shaped portion may be provided on the connecting member.

[0032]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 to 12 show the first embodiment.

FIG. 1 schematically shows a part of an ink supply device of a printing machine. 2 is an enlarged plan view of a part of FIG. 1 seen from above, and FIG. 3 is a partially cutaway enlarged front view of the portion of FIG. 2 seen from the front. The up-down direction of FIG. 1 substantially corresponds to the up-down direction of the printing machine. In the description of the first embodiment, the left side of FIG. 1 is the front, the right side is the rear, and the left and right when looking from the front to the back are the left and right. Therefore, the lower side of FIG. 2 is the front,
The upper side is the rear side, and the left and right sides in FIGS. 2 and 3 are the left and right sides.

In FIG. 1, in front of the ink source roller (3) adjacent to the front end of the ink amount adjusting plate (2) forming the bottom of the ink fountain (1), the first ink of a plurality of ink kneading rollers is provided. The kneading roller (4) is arranged, and the ink feeding roller unit (5) is provided between the original roller (3) and the kneading roller (4).
Is arranged. The roller unit (5) is the roller (3)
(4) Multiple ink dispensing rollers (1
The calling roller (13) is an assembly of 3) and is axially spaced. The number of calling rollers (13) is arbitrary, but in this embodiment, five rollers are provided and are numbered 1 to 5. These rollers
The axes of (3), (4) and (13) are parallel to each other and extend in the left-right direction. The original roller (3) and the kneading roller (4) are rotatably supported by the frame (6) of the printing machine, and are continuously rotated in a direction indicated by an arrow in FIG. To be

The overall structure of the roller unit (5) is shown in FIGS. 2 and 3, and the structure of each part thereof is shown in FIGS. 4 and 5. An example of the configuration of the roller unit (5) will be described with reference to these drawings.

A linear support member parallel to the rollers (3) and (4)
The left and right ends of (7) are fixed to the frame (6) and
There are as many movable members (8) as there are calling rollers (13) around (7). The support member (7) has a prismatic shape whose vertical width is larger than its front-back width. The movable member (8) has a short columnar shape, and the movable member (8) is formed with a relatively large angular hole (9) penetrating the movable member (8) in the axial direction. In addition, a groove (10) is formed in the center of the rear surface of the hole (9) in the up-down direction and extends over the entire length of the movable member (8). A plurality of movable members (8) are arranged at predetermined intervals in the axial direction between a pair of left and right disc-shaped positioning members (11) fixed to the support member (7). The support member (7) is passed through the hole (9) in 8). The front and rear width of the hole (9) of the movable member (8) is almost equal to the front and rear width of the support member (7), and the front and rear surfaces of the hole (9) are in sliding contact with the front and rear surfaces of the support member (7). Also, the vertical width of the hole (9) is slightly larger than the vertical width of the support member (7), and the movable member (8) is
The upper end position and hole where the lower surface of (9) contacts the lower surface of the support member (7)
The upper surface of (9) can move vertically between the lower end position in contact with the upper surface of the support member (7). The outer end faces of the movable members (8) at the left and right ends are only in sliding contact with the end faces of the positioning member (11), and there is a gap between the adjacent movable members (8), so each movable member (8) is movable. The members (8) can move individually in the vertical direction. The inner ring of the ball bearing (12) is fixed to the outer peripheral surface of each movable member (8), and the cylindrical calling roller (13) is fixed to the outer ring of each bearing (12). Each calling roller (13) is composed of a metal sleeve (14) fixed to the outer side of the outer ring of the bearing (12) and a thick rubber cylindrical portion (15) fixed to the outer side thereof. There is. Calling Roller (13)
Since it is attached to the movable member (8) via the bearing (12), it can rotate freely with respect to the movable member (8), but the surface orthogonal to the axial direction (vertical axis and longitudinal direction It does not move with respect to the movable member (8) within the plane including the axis of. Therefore, the calling roller (13) can move between the upper end position and the lower end position as the movable member (8) moves in the vertical direction.

At a portion between each movable member (8) and the supporting member (7), a position switching device (16) as a position switching means for each calling roller (13) is provided as follows. That is, the support member corresponding to the axial center of the movable member (8).
A cylinder portion (17) extending upward from the lower surface and a spring accommodating hole (18) extending downward from the upper surface are formed in the portion (7). A piston (19) is slidably inserted in the cylinder portion (17) through a seal (20). Spring receiving hole (18)
An urging ball (21) is vertically slidably inserted in the upper part of the inside of the hole (18) and an elastic member for urging the ball (21) upward between the bottom of the hole (18) and the ball (21). A compression coil spring (22) is inserted. Center line of cylinder (17) and spring hole
The center line of (18) is on a straight line that passes through the center line of the movable member (8) and is orthogonal thereto. An air supply hole (23) extending in the axial direction is formed in the support member (7), and one end of this hole (23) is connected to a compressed air source (not shown). Movable member (8)
A solenoid valve (24) is attached to the front surface of the supporting member (7) facing the groove (10), and two ports of this valve (24) are connected to a communicating hole (25) formed in the supporting member (7). ) (26) Air supply hole through
(23) and the cylinder part (17) communicate with each other.
Further, the electric wire (27) of the valve (24) is drawn out through the groove (10) and is connected to the control device (28). When the valve (24) is energized (ON state), the cylinder (17) is
The cylinder portion (17) is communicated with the atmosphere through the valve (24) in a state where it is communicated with the air supply hole (23) through 4) and the energization is stopped (OFF state). Then, the control device (28) individually switches the energized state of the valve (24) of each switching device (16) to individually switch the vertical position of each calling roller (13). That is, when the valve (24) is switched to the off state, the cylinder (17) is brought into communication with the atmosphere, so that the piston (19) can freely move inside the cylinder (17). Therefore, the movable member (8) is moved upward by the spring (22) via the ball (21). As a result, the movable member (8) and the calling roller (13)
Is switched to the upper end position. When the valve (24) is switched to the ON state, the cylinder portion (17) is connected to the compressed air source through the air supply hole (23) and further through this, so compressed air is supplied to the cylinder portion (17). It For this reason, the spring (22)
The piston (19) protrudes downward from the support member (7) against the force of, and the movable member (8) is moved downward. As a result, the movable member (8) and the calling roller (13)
Is switched to the lower end position. Since the center line of the cylinder part (17) and the center line of the spring accommodating hole (18) are on one straight line which passes through the center line of the movable member (8) and is orthogonal to this, the valve (2
The movement of the calling roller (13) by the piston (19) and the spring (22) when switching 4) is very smooth, and the time required for position switching is extremely short.

A connecting member (30) is provided between two adjacent calling rollers (13). Connecting member
The structure of (30) and the relationship between this and the calling roller (13) are
Details are shown in the cross-sectional view of FIG. 4 and the exploded perspective view of FIG. The connecting member (30) has a cylindrical shape with a hole. Connecting member
The inner diameter of (30) is slightly smaller than the outer diameter of the movable member (8), and there is a relatively large gap between the inner periphery of the connecting member (30) and the support member (7). The outer diameter of the connecting member (30) is between the inner diameter and the outer diameter of the calling roller (13). First elongated holes (31) slightly longer in the diameter (D1) direction are formed at two symmetrical positions on the arbitrary diameter (D1) of the connecting member (30). In addition, this diameter
Let (D1) be the first diameter. The first diameter of the connecting member (30) (D
A second elongated hole (32) slightly longer in the diameter (D2) direction is formed on the second diameter (D2) orthogonal to 1). Insert a metal ring inside the sleeve (14) on each end of the page roller (13).
(33) is fixed so that the outer ring of the bearing (12) is sandwiched from both left and right sides. The outer end surface of the ring (33) is
It is flush with the end face of (13) or located slightly inside. Pins (pin-like portions) (33a) projecting outward from the end surface of the calling roller (13) are integrally formed at two diametrically symmetrical positions of the ring (33). Two pins (33) of the calling roller (13) on one side of the connecting member (30)
a) is fitted into the two first slots (31) of the connecting member (30), and the calling roller unit (13) is attached to the first slot (31) of the connecting member (30). Is used as a guide to move only in the first diameter (D1) direction. The two pins (33a) of the roller (13) on the opposite side of the connecting member (30) are connected to the connecting member (3).
0) is fitted into the two second slots (32), and the calling roller (13) guides the second slot (32) to the connecting member (30) and has the second diameter. It can move only in the (D2) direction. The first elongated hole (31) of the connecting member (30) and the pin (33a) of the one roller unit (13) fitted into the first elongated hole (31) form the first elongated hole (31) of the calling roller (13) and the connecting member (30). It constitutes a first guide means that allows only relative movement in the diameter (D1) direction.
The second elongated hole (32) of the connecting member (30) and the pin (33a) of the other roller unit (13) fitted into the second elongated hole (32) are attached to the calling roller (1).
It constitutes a second guide means which allows only relative movement of 3) and the connecting member (30) in the second diameter (D2) direction. Connecting member (3
The calling roller (13) on one side of (0) can move only in the first diameter (D1) direction with respect to the connecting member (30), and the calling roller (13) on the opposite side of the connecting member (30) is connected. Since it can move only in the second diameter (D2) direction with respect to the member (30), these two calling rollers (13) move relative to each other in the plane orthogonal to the axial direction via the connecting member (30). However, they are connected so that relative movement (relative rotation) in the circumferential direction is not possible. However, in this embodiment, the calling roller
Since (13) is constrained by the support member (7) so that it can move only in the vertical direction, two adjacent roller units (13) can move relatively only in the vertical direction. .

In this embodiment, each calling roller is
Regarding (13), the positions of the pins (33a) of the rings (33) at the left and right ends coincide with each other in the circumferential direction, but their positional relationship can be arbitrarily changed.

The roller unit (5) includes the calling rollers (1
While 3) is constantly in contact with the kneading roller (4), it is switched to the upper end position (non-calling position) shown in FIG. 5 and the lower end position (calling position) shown in FIG. 5 to the non-calling position. When you switch to the calling position, touch the original roller (3) so that it will come off the original roller (3).
Are located. The calling roller (13) is always a kneading roller.
Since it is in contact with (4), it is driven to rotate at the same peripheral speed by the friction in the direction of the arrow in Fig. 1. Adjacent 2
Since the three calling rollers (13) are connected by the connecting member (30) so as not to move relative to each other in the circumferential direction, all the calling rollers (13) integrally rotate at the same rotation speed.
In addition, the connecting member (30) includes two adjacent call rollers (1).
Since the relative movement in the plane orthogonal to the axial direction of 3) is allowed, each calling roller (13) is a kneading roller.
While contacting (4) and rotating, it can be switched between the non-calling position and the calling position individually.

The ink in the ink fountain (1) passes through the ink passage between the adjusting plate (2) and the original roller (3), and then the original roller (3).
Appear on the surface of. At this time, by adjusting the size of the gap of the ink passage, it is possible to adjust the film thickness of the ink that appears on the surface of the original roller (3), that is, the ink amount. The ink on the surface of the original roller (3) is transferred to the surface of the calling roller (13) while the calling roller (13) is switched to the calling position and is in contact with the original roller (3). The ink transferred to the surface of the take-up roller (13) is transferred to the corresponding portion of the surface of the kneading roller (4) which is in constant contact with it.
The ink transferred to the kneading roller (4) is further supplied to the printing surface via a plurality of ink kneading rollers and the like. Then, the control device (28) controls the ratio of switching to the calling position for each calling roller (13), whereby the ink amount supplied to the printing surface is adjusted by the position in the width direction. All calling rollers (1) of the roller unit (5)
3) rotate at the same rotation speed, so each calling roller (13)
The amount of ink supplied to the printing surface can be changed by simply controlling the ratio of switching to the calling position.
It is possible to accurately control to a desired value for each (13), that is, for each position in the width direction of the printing surface.

The control of the rate at which the calling roller (13) is switched to the calling position can be performed on the basis of an arbitrary value such as time or the rotation amount of the original roller (3). In this case, the rotation amount of the original roller (3) is used as a reference.

The control device (28) and the solenoid valve (2
FIG. 7 shows an example of the electrical configuration of the main part of the ink supply device including 4), and FIG. 8 shows the signals of each part.

In FIG. 7, the five solenoid valves (24) are numbered 1 to 5 corresponding to the calling rollers (13).

The ink supply device is provided with a rotation amount detector (50), and the rotation amount detection signal is input to the control device (18) and the calling signal generator (51). The rotation amount detector (50)
It detects the rotation angle (phase angle) of the original roller (3) and outputs a detection signal proportional to it. The phase angle of the original roller (3) corresponds to 360 ° per rotation, and the detection signal repeats a change of 0 ° to 360 ° each time the original roller (3) rotates once. The ringing signal generator (51) outputs a ringing signal to each ringing roller (13) at a certain ringing interval based on the detection signal of the rotation amount detector (50), that is, the phase angle of the original roller (3). To do. In the case of this embodiment, as shown in FIG. 8, the calling interval is the phase angle 360 of the former roller (3).
The calling signal to each calling roller (13) is output once each time the original roller (3) makes one rotation. Further, in order that the calling signals for the five calling rollers (13) are output one by one at equal intervals while the original roller (3) makes one revolution, the calling signal output for each calling roller (13) is performed. The timing is shifted by a phase angle of 72 °. Then, for example, when the ringing signal for the first ringing roller (13) has a phase angle of 0 °, the ringing signal for the second ringing roller (13) has a phase angle of 72 °.
When the phase angle is 144 °, the call signal to the third call roller (13) is
The call signal for 3) is when the phase angle is 216 °,
The call signals to the fifth call roller 13 are output when the phase angle is 288 °.

A condition setter (52) is connected to the control device (28). In the condition setting device (52), the ink amount to be called is set for each calling roller (13). In this embodiment, the ink amount is set in proportion to the rotation angle of the original roller (3) so that the rotation angle of 300 ° is 100% of the ink amount. Therefore, the maximum set value of the ink amount, that is, the rotation angle of 360 ° during one rotation of the original roller (3)
The ink amount set value corresponding to is 120%. Further, the minimum setting value of the ink amount is 0.125%, and the ink amount is set between the minimum setting value 0.125% and the maximum setting value 120% in 0.125% increments which is the minimum setting value. To be done. The minimum set value is smaller than the above-mentioned minimum called ink amount called by the ink calling roller while the ink calling roller is in contact with the ink source roller for the minimum time, and the minimum set value is also set in the setter (52). Also, the setting device (52)
The minimum calling ink amount or a value slightly larger than the above is set as the minimum calling ink amount. For example, when the minimum amount of recall ink is 5% or slightly smaller, 5% is set as the minimum amount of recall ink. The ink amount is set to 0% for the calling roller 13 that does not need to call the ink.

The control device (28) is provided with a microcomputer (not shown) and the like, and controls the switching device (16) of each calling roller (13) based on the above ink amount set value. The call position signal is output from the control device (18) to the valve (24) of each switching device (16), and while the call position signal is on, the valve (24) is on as described above, While the calling roller (13) is held in the calling position and the calling position signal is off, the valve (24) is turned off as described above, and the calling roller (13) is held in the non-calling position.

Next, when the ink amount set value for each calling roller (13) is larger than the minimum calling ink amount, for example, the first calling roller (13) is 20% and the second calling roller (13) is 40%. %, The third calling roller (13) is 60%,
80% of the 4th calling roller (13), 5th calling roller
Taking the case where (13) is 100% as an example, referring to FIG. 8, a control device (28), a switching device (16) and a calling roller.
The operation (13) will be described.

First, when the calling signal for the first calling roller (13) is output when the phase angle of the original roller (3) becomes 0 °, the calling position signal for the first valve (24) is output. Turns on. As a result, the first valve (24) is turned on and the first calling roller (13) is switched to the calling position. Then, from this time point, when the original roller (3) rotates by the rotation angle (60 °) corresponding to the set value of 20% (phase angle 60 °), the call position signal corresponding to the first valve (24) becomes Turn off. As a result, the first valve (24) is turned off and the first call roller (13) is switched to the non-call position. Similarly, when the calling signal corresponding to the second calling roller (13) is output at the phase angle of 72 °,
The call position signal for the second valve (24) is turned on, the second valve (24) is turned on, the second call roller (13) is switched to the call position, and from this point on the set value 40 When the original roller (3) is rotated by a rotation angle (120 °) corresponding to% (phase angle 192 °), the call position signal corresponding to the second valve (24) is turned off and the second valve (24) is turned off. (24) is turned off and the second calling roller (13) is switched to the non-calling position. When the calling signal corresponding to the third calling roller (13) is output at the phase angle of 144 °, the third calling roller (13) outputs the third signal.
The call position signal for the valve (24) is turned on, the third valve (24) is turned on, the third call roller (13) is switched to the call position, and from this point the set value is 60%. At the time when the original roller (3) is rotated by the corresponding rotation angle (180 °) (phase angle 324 °), the call position signal corresponding to the third valve (24) is turned off, and the third valve (24) is turned off. ) Is turned off and the third calling roller (13) is switched to the non-calling position. At the time when the phase angle is 216 °, when the calling signal corresponding to the fourth calling roller (13) is output, the fourth valve
The call position signal for (24) turns on and the fourth valve (2
4) is turned on, the fourth calling roller (13) is switched to the calling position, and from this time, when the original roller (3) is rotated by the rotation angle (240 °) corresponding to the set value 80% ( At a phase angle of 96 °), the call position signal corresponding to the fourth valve (24) is turned off, the fourth valve (24) is turned off,
The fourth calling roller (13) is switched to the non-calling position. At the time when the phase angle is 288 °, the fifth calling roller (1
When the call signal corresponding to 3) is output, the fifth valve (24)
The call position signal for the switch is turned on, the fifth valve (24) is turned on, and the fifth call roller (13) is switched to the call position. From this point, the rotation angle corresponding to the set value 100% ( At the time when the original roller (3) rotates by 300 °) (phase angle 228 °), the calling position signal corresponding to the fifth valve (24) turns off and the fifth valve (24) turns off. As a result, the fifth calling roller 13 is switched to the non-calling position. Then, for each calling roller (13), such an operation is repeated at each calling interval, and as a result, the five calling rollers (13) are sequentially switched to the calling position one by one at equal intervals. After being held in the calling position only during the time corresponding to the quantity set value, it is switched to the non-calling position.

In this case, the timings at which the five calling rollers 13 are switched to the calling positions are all different, and no two or more calling rollers 13 are simultaneously switched to the calling position. When the) is switched to the calling position, a large impact force does not act on the original roller (3). Therefore, the original roller (3) and its support mechanism,
The driving mechanism is less likely to be adversely affected by the impact force, and the impact roller is less likely to bend the original roller (3). Therefore, it is less likely that the size of the ink passage between the ink amount adjusting plate (2) and the ink amount on the surface of the original roller (3) will change.

Regarding the calling roller (13) with the ink amount set value of 0%, the calling position signal remains off even if the calling signal is output, and the calling roller (13) is held at the non-calling position. It has been done. Therefore, the calling roller (13) does not contact the original roller (3), and the ink is not transferred to the calling roller (13) and the kneading roller (4). In addition, the call roller (1
Regarding 3), the call position signal is never turned off, and the call roller (13) remains held at the call position. Therefore, the calling roller (13) remains in contact with both the original roller (3) and the kneading roller (4),
Ink is continuously transferred from (3) to the kneading roller (4) via the calling roller (13). This ink amount setting value is 120%
For the calling roller (13), the ratio of the time during which the ink can be transferred from the original roller (3) to the kneading roller (4) to the total operation time is 1.

FIG. 9 shows the relationship between the ink amount set value and the ink amount actually called to the calling roller (13) at one time. If the contact width of the calling roller (13) and the original roller (3) is very small, and the calling roller (13) is the original roller (3).
Assuming that the minimum time of contact with
As shown in (a), even if the set value becomes small, the ink amount actually called to the calling roller (13) at one time can be made equal to the set value. However, in reality, since the cylindrical portion (15) of the calling roller (13) is made of an elastic material such as rubber, the contact width with the original roller (3) becomes large to some extent. Also, because of the response time of the solenoid (not shown) of the valve (24) of the switching device (16), the calling roller (13) is the original roller.
The minimum time of contact with (3) is also increased to some extent. Therefore, as shown in FIG. 9B, when the set value is equal to or more than the above-mentioned minimum calling ink amount, the calling roller (13) and the original roller are
Considering the contact width of (3) and the response time of the solenoid,
By controlling the switching device (16), it is possible to accurately control the amount of ink that is called to the calling roller (13) at one time according to the set value, but make the set value smaller than the minimum called ink amount. However, it is not possible to make the amount of ink actually ejected to the ink ejecting roller less than the minimum amount of ejected ink at one time. That is, if the set value becomes smaller than the minimum calling ink amount, the ink amount actually called to the calling roller (13) at one time cannot be made equal to the setting value.

Therefore, even if the set value of the ink amount is less than the minimum calling ink amount, the control device (28) controls the average calling amount to be equal to the set value while the calling signal is output a plurality of times. The following control is performed.

That is, when the set value of the ink amount is equal to or larger than the minimum calling ink amount, this set value is set as one calling amount as described above, and the calling operation is performed every time the calling signal is output. To do. In this case, since the set value is equal to or more than the minimum calling ink amount, even if the set value is set as one calling amount as it is, the one calling amount becomes equal to or more than the minimum calling ink amount. Therefore, as described above, it is possible to accurately control the amount of ink called by the calling roller 13 at one time according to the set value. Since such a calling operation is performed every time, the average calling amount of a plurality of times also exactly matches the set value.

When the ink amount set value is less than the minimum recall ink amount, the minimum recall ink amount is defined as one recall amount,
The number of calls is made less than the number of times the call signal is output. If the calling amount is set to be the minimum calling ink amount and the calling operation is performed every time, the average calling amount of a plurality of times becomes larger than the set value. However, by not performing the calling operation every time, the average calling amount of a plurality of times can be made equal to the set value.

Next, the operation of the control device (28) will be described in more detail with reference to the flowcharts of FIGS. 10 and 11 and the time chart of FIG. The above control is performed for each calling roller (13), but since the contents of each control are the same, only one calling roller (13) will be described. Further, in FIG. 10 and FIG. 11, only a part relating to one calling roller (13) is extracted and schematically shown from the whole flow chart.

FIG. 10 shows a flowchart for setting conditions before printing.

When the activation signal is input, first, step 10
1, the minimum recall ink amount from the setting device (52) (5%
Read). Next, in step 102, the minimum set value is read from the setter (52). Next, in step 103, the ink amount set value of each calling roller (13) is read from the setter (52). Next, in step 104, the set value is compared with the minimum calling ink amount, and if the setting value is less than the minimum calling ink amount, the process proceeds to step 105. Step 10
In 5, divide the minimum calling ink amount by the minimum setting value,
Let the result be the decomposition number M. The minimum calling ink amount is 5%
Then, if the minimum set value is 0.125%, M becomes 40. Next, in step 106, the set value is divided by the minimum set value, and the result is set as the number of calls N. When the set value is 4.875%, N is 39, when the set value is 2.5%, N is 20, and when the set value is 0.125%, N is 1. Then, in step 107, M and N are divided by their greatest common divisor, and the results are taken as the final decomposition number m and the number of calls n, respectively. Set value is 4.87
In the case of 5%, m and n remain 40 and 39, and when the set value is 0.125%, m and n remain 40 and 1. When the set value is 2.5%, m is 2 and n is 1. Next, at step 108, the one-time call amount is set to the minimum call ink amount, and the process is ended. Step 104
If the set value is equal to or more than the minimum calling ink amount in, the process proceeds to step 109. In step 109, the disassembly number m and the call number n are set to 1, respectively. next,
In step 110, set one call volume to the set value,
The process ends.

FIG. 11 shows a flow chart for controlling the switching device (16) at the time of printing.

When printing is started, first, in step 201, the disassembly number counter Cm is set to m. Next, at step 202, n is set in the call counter Cn. Next, in step 203, it is checked whether or not the calling signal is output, and step 203 is repeated until it is output. When the calling signal is output in step 203, the process proceeds to step 204. In step 204, Cn
Check if 0, and if not, step
Continue to 205. In step 205, a calling operation is performed. As described above, this calling operation is performed by switching the calling roller (13) from the non-calling position to the calling position and then again to the non-calling position. The rate at which the call roller (13) is switched to the call position is controlled so that an amount of ink equal to the amount is called to the call roller (13). Then, in step 206, subtract 1 from Cn,
Go to step 207. If Cn becomes 0 in step 204, the process directly proceeds to step 207. At step 207, 1 is subtracted from Cm, and the routine proceeds to step 208. Steps
At 208, it is checked whether or not Cm becomes 0. If Cm becomes 0, the process returns to step 201, and if not 0, step 203
Return to

When the set value of the ink amount is equal to or larger than the minimum recalling ink amount (5%), both m and n are set to 1 in the flowchart of FIG. Therefore, FIG.
In the flowchart of FIG. 1, the calling operation of step 205 is always executed every time a calling signal is output (see the column of set value 5% or more in FIG. 12). This is the same operation as previously described for FIG.

When the set value of the ink amount is 4.875%, 40 is set in m and 39 is set in n in the flowchart of FIG. Therefore, in the flowchart of FIG. 11, the calling operation of step 205 is executed 39 times while the calling signal is output 40 times (see the column of set value 4.875% in FIG. 12). And, since the calling amount of one time is 5%, the average calling amount per one time during 40 times of the calling signal is 4.875% (= 5 × 39/40), and the calling of the ink according to the set value is performed. You can

When the set value of the ink amount is 2.5%, m is set to 2 and n is set to 1 in the flowchart of FIG. Therefore, in the flowchart of FIG. 11, the calling operation of step 205 is executed once while the calling signal is output twice (set value 2.5% in FIG. 12).
Column). That is, the calling operation is performed every other time of the calling signal. And, since the calling amount of one time is 5%, the average calling amount per one time between the two calling signals is 2.5% (= 5 × 1/2), and the calling of the ink according to the set value is performed. You can

When the set value of the ink amount is 0.125%, m is set to 40 and n is set to 1 in the flowchart of FIG. Therefore, in the flowchart of FIG. 11, the calling operation of step 205 is executed once while the calling signal is output 40 times (see the column of the set value 0.125% in FIG. 12). And the amount of one call is 5
%, The average replenishment amount for each 40 replenishment signals is 0.125% (= 5 × 1/40), and ink can be replenished according to the set value.

In the above embodiment, when the ink amount set value is less than the minimum recall ink amount, the one-time recall amount is made equal to the minimum recall ink amount, but even if it is slightly larger than the minimum recall ink amount. Good. For example, when the minimum calling ink amount is 5% and the set value is 3%, if the calling amount for one time is set to 6% and the calling operation is performed once every two calling signals, the The average call amount of is equal to the set value (6 × 1/2 = 3).

13 to 15 show the second embodiment.

FIG. 13 is a partially cutaway front view of the roller unit (5) seen from the front, and FIGS.
2 is a cross-sectional view of two cross sections of FIG. The vertical direction of each of these figures is substantially the same as the vertical direction of the printing press.
Further, in the description of the second embodiment, FIG. 14 and FIG.
The left side of 5 is the front, the right side is the rear, and the left and right when viewed from the front to the back, that is, the left and right in FIG.

In the second embodiment, the roller unit
The parts other than (5) are the same as those in the first embodiment, and thus the description thereof will be omitted. Further, in the roller unit (5), parts corresponding to those of the first embodiment are designated by the same reference numerals.

Also in the case of the second embodiment, the support member (7) is passed inside the connecting member (30) between the plurality of calling rollers (13) at a considerable interval in the radial direction. , The call roller (13) and the connecting member (30) are sandwiched between a pair of left and right positioning members (11) fixed to the support member (7),
These are positioned in the left-right direction.

The connecting member (30) is the same as in the first embodiment. Each calling roller (13) is composed of a thick-walled short-cylindrical support ring (40) and a rubber-made thick-walled cylindrical portion (15) fixed to the outside thereof, and is located inside the ring (40). The cylindrical permanent magnet (41) forming the switching means is stopped. The end faces of the two calling rollers (13) at the left and right ends facing the positioning member (11) are flat,
These end surfaces are slidably in contact with the end surface of the positioning member (11) and can move in the radial direction. At each end surface of the call roller (13) other than these two end surfaces, the call roller
Pins (33a) protruding from the end face of (13) are integrally formed at two symmetrical locations on one diameter. Then, as in the case of the first embodiment, these pins (33a) are fitted into the corresponding elongated holes (31) (32) of the adjacent connecting members (30) so as to move only in the diametrical direction. The two adjacent call rollers (13) are connected to each other through the connecting member (30) so that they can move relative to each other in a plane orthogonal to the axial direction but cannot rotate relative to each other.

The support member (7) has a cylindrical shape, and a circular hole (42) is formed at the center thereof. On the outer peripheral portion of the support member (7) inside each calling roller (13), a magnet device (43) constituting a position switching means is provided for each calling roller (13). The magnet device (43) is composed of an electromagnet (44) and a substantially cylindrical permanent magnet (45). A plurality of sleeves (46) and permanent magnets (45) having the same diameter are alternately fitted around the support member (7), and thereby the permanent magnets (45) are positioned and fixed. A part of the upper side of each permanent magnet (45) is cut out, and the electromagnet (44) is fixed to the outer periphery of the support member (7) in this part, and the permanent magnet (45) and electromagnet (44) It has a cylindrical shape. The outer diameter of the magnet device (43) is considerably smaller than the inner diameter of the permanent magnet (41) of the calling roller (13), and there is a radial gap between them. Also Sleeve (46)
The inner diameter of is much smaller than the inner diameter of the connecting member (30) located on the outer side thereof, and there is also a radial space between them. Then, the calling roller (13) and the connecting member (30)
Are freely movable in the radial direction with respect to the support member (7). Further, the electric wire (47) of each electromagnet (44) is drawn out of the support member (7) through the hole (42) of the support member (7) and is connected to the control device (28). Each permanent magnet (41) (4
5) has magnetic poles on the inner and outer peripheral surfaces, and the permanent magnets (41) of the calling roller (13) exert repulsive force on each other, and
These magnetisms are determined so as to receive a repulsive force from the permanent magnet (45) of the magnet device (43). For example, the inner peripheral surface of the permanent magnet (41) of the calling roller (13) has an N pole and the outer peripheral surface has an S pole.
The pole, the outer peripheral surface of the permanent magnet (45) of the magnet device (43) is an N pole, and the inner peripheral surface is an S pole.

Each calling roller (13) has a corresponding magnet device.
Permanent magnet (41) and magnet device (43) due to repulsive force from (43)
And are opposed to each other with a gap in the radial direction, and are positioned in the radial direction, and the state of the magnet device (43), that is, the electromagnet (4
By switching the energization state of 4), the upper non-calling position and the lower calling position can be individually switched. In the roller unit (5), each calling roller (13) is always a kneading roller.
Switched between the non-calling position and the calling position while in contact with (4), and when switched to the non-calling position, the original roller
It is arranged so as to come into contact with the original roller (3) when it is separated from (3) and switched to the calling position. Electromagnet (4
4) In the state where the power supply is stopped (OFF state) and the outer peripheral side is N
It is switched to a state of being energized (ON state) so that the inner peripheral side of the pole becomes the S pole. When the electromagnet (44) is switched to the off state, the roller unit (13) is located at the calling position as shown by the chain line in FIG. 15, and both the kneading roller (4) and the original roller (3) are located. Being in contact. At this time, the repulsive force from the permanent magnet (45) of the magnet device (43), the kneading roller (4)
The pressure from the original roller and the pressure from the original roller (3) are balanced,
The call roller (13) is held in the call position. Electromagnet (4
When 4) is switched to the ON state, the permanent magnet (41) of the calling roller (13) receives an upward repulsive force from the electromagnet (44), and the calling roller (13) moves upward. As a result, as shown by the solid line in FIG. 15, the calling roller (13) is switched to the non-calling position and separated from the original roller (3). At this time, the repulsive force from the permanent magnet (45) and electromagnet (44) of the magnet device (43) and the pressure from the kneading roller (4) are balanced, and the calling roller (13) is held at the calling position. . Electromagnet (44)
When is turned off, the repulsive force from the electromagnet (44) disappears, and the calling roller (13) moves downward.
As a result, the calling roller (13) is switched to the non-calling position and comes into contact with the original roller (3). Also in this case, as in the case of the first embodiment, all the calling rollers (13) of the roller unit (5) rotate integrally at the same rotation speed, and the control device
By individually switching the state of each magnet device (43) at (28), each calling roller (13) is individually switched between the non-calling position and the calling position. Further, in both the non-calling position and the calling position, the calling roller (13) and the connecting member
(30) is the magnet device (43) and sleeve (4) on the support member (7) side.
6) is held in non-contact with the calling roller (1
The rotation resistance of 3) and the connecting member (30) is very small.

Others are the same as in the case of the first embodiment, and the same parts are denoted by the same reference numerals.

In the above embodiment, the calling roller (13)
Always contacts the kneading roller (4), and when it is switched to the calling position, it simultaneously contacts both the kneading roller (4) and the original roller (3).
The ratio of the time that ink can be transferred to (4) to the total operation time can be set to 1 at the maximum. Therefore, even in the case of heavy-duty printing or high-speed printing, a required amount of ink can be supplied. However, it is also possible to contact only the original roller (3) when switched to the calling position and contact only the kneading roller (4) when switched to the non-calling position.

In the above embodiment, the calling roller (13) is driven to rotate by friction.
It is also possible to forcibly rotate all the calling rollers (13) by driving the calling rollers (13) at one end with an appropriate driving means.

[Brief description of the drawings]

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

FIG. 2 is an enlarged plan view of a portion of an ink feeding roller unit.

FIG. 3 is a partially cutaway front view of a portion of an ink feeding roller unit.

4 is a cross-sectional view taken along line S4-S4 of FIG.

5 is a cross-sectional view taken along the line S5-S5 of FIG.

FIG. 6 is an exploded perspective view of an ink feeding roller and a connecting member.

FIG. 7 is a block diagram showing an example of an electrical configuration of a main part of the ink supply device.

FIG. 8 is a diagram showing one of a call signal and a call position signal.
It is a time chart which shows an example.

FIG. 9 is a graph showing the relationship between the ink amount set value and the amount of ink actually called by the ink drawing roller at one time.

FIG. 10 is a flowchart showing an example of processing of the control device.

FIG. 11 is a flowchart showing another example of processing of the control device.

FIG. 12 is a time chart showing another example of a calling signal and a calling position signal.

FIG. 13 is a partially cutaway front view of a portion of an ink feeding roller unit according to a second embodiment of the present invention.

14 is a cross-sectional view taken along the line S14-S14 of FIG.

15 is a cross-sectional view taken along the line S15-S15 of FIG.

[Explanation of symbols]

 (1) Ink fountain (3) Ink fountain roller (4) Ink mixing roller (5) Ink feeding roller unit (7) Support member (8) Movable member (9) Hole (13) Ink feeding roller (16) Position switching device (Position switching means) (17) Cylinder part (18) Spring accommodating hole (19) Piston (22) Compression coil spring (elastic member) (24) Solenoid valve (28) Control device (30) Connecting member (31) (32) ) Slot (33) Ring (33a) Pin (pin-like part) (41) Permanent magnet (43) Magnet device (position switching means) (44) Electromagnet (45) Permanent magnet (50) Rotation detector (51) Ringing signal generator (52) Condition setter

Claims (13)

[Claims] 1. A plurality of ink feeding rollers divided in the length direction of the ink feeding roller are arranged in the vicinity of the ink feeding roller of the ink fountain, and each ink feeding roller has a calling position for contacting the ink feeding roller. It is designed so that it can be switched individually to the non-calling position away from the ink source roller. At a predetermined calling interval, the required ink calling roller is switched to the calling position to call the ink, and each ink calling roller is called. In the ink supply device of the printing press, which controls the amount of ink to be fed to the ink feeding rollers by controlling the ratio of switching to the position, not all the ink feeding rollers are switched to the feeding position at the same time. In addition, the timing for switching the ink calling roller to the calling position is shifted. Ink supply device for printing machines. 2. An ink supply for a printing press according to claim 1, wherein each ink feeding roller is adapted to be switched between a calling position and a non-calling position while being in constant contact with the ink kneading roller. apparatus. 3. An ink to be called to an ink feeding roller by controlling a ratio of setting an ink amount for each ink feeding roller and switching to a calling position according to the set ink amount for each ink feeding roller. The amount of ink is controlled so that an ink amount smaller than the minimum recall ink amount that is called by the ink recall roller while the ink recall roller is in contact with the ink source roller for the minimum time is set as the minimum set value. For ink refill rollers with a smaller ink replenishment amount, set the ink replenishment amount for one replenishment operation to be the minimum replenishment ink amount or more, and set the replenishment interval according to the ink replenishment amount and ink amount setting value 2. The number of calls is reduced as compared with the case where a call is made every time. Other ink supply device 2 of the printing press. 4. A linear support member parallel to the ink source roller is passed through the inside of the ink feeding roller, and each ink feeding roller is rotatable with respect to the supporting member and in a plane orthogonal to the axial direction. Is arranged around the supporting member so as to be movable in the direction of the arrow, so that each ink inquiring roller is switched between the invoking position and the non-invoking position in the plane orthogonal to the axial direction by the position switching means provided in each. Ink supply device for a printing machine according to any one of claims 1 to 3, characterized in that 5. The supporting member has a prismatic shape, and in this supporting member, a plurality of angular hole portions formed in a plurality of short cylindrical movable members have a gap in one width direction of the supporting member. The movable member is fitted so as to be movable in the width direction with respect to the supporting member, and the ink replenishing rollers are rotatably attached to the outer sides of the respective movable members. The ink supply device for a printing press according to claim 4, wherein each of them is provided with a position switching means. 6. Each position switching means includes an elastic member provided on a support member for urging the movable member to one side in the width direction, a cylinder portion formed on the support member, and sliding inside the cylinder portion. When the piston is inserted freely and compressed air is supplied to the cylinder part, the piston that moves the movable member to the opposite side in the width direction against the biasing force of the elastic member and the cylinder part that is provided on the support member are compressed. An ink supply device for a printing press according to claim 5, further comprising a valve for supplying air. 7. An elastic member is inserted into a hole formed in a supporting member, and a center line of the hole and a center line of the cylinder portion form one straight line which passes through the center line of the movable member and is orthogonal to the center line. The ink supply device for a printing press according to claim 6, which is provided. 8. A columnar supporting member is passed through the inside of a plurality of ink feeding rollers at intervals in the radial direction, and each position switching means includes a permanent magnet provided on the inner peripheral portion of the ink feeding roller. A magnet device including an electromagnet provided on the outer peripheral portion of the support member inside the ink recalling roller is provided, and the permanent magnet of the ink recalling roller and the magnet device of the supporting member are radiused by switching the energization state of the electromagnet of the magnet device. The ink supply device for a printing press according to claim 4, wherein the position of the ink feeding roller is switched in a state of facing each other at a predetermined interval in the direction. 9. A permanent magnet provided on an ink feeding roller has a cylindrical shape, and a magnet device has a substantially cylindrical permanent magnet fixed to an outer peripheral portion of a supporting member and having a partially cutout shape, and the permanent magnet. Is provided with an electromagnet fixed to the outer peripheral portion of the notched portion of the support member, and the position of the ink feeding roller can be switched by switching between a state in which energization to the electromagnet is stopped and a state in which the electromagnet is energized. The ink supply device for a printing press according to claim 8, wherein: 10. A connecting member is provided between the end faces of adjacent ink feeding rollers to permit relative movement of two adjacent ink feeding rollers in a plane orthogonal to the axial direction but to prevent relative movement in the circumferential direction. The ink supply device for a printing press according to claim 4, wherein the ink supply device is provided. 11. The ink supply device for a printing press according to claim 10, wherein the connecting member has a disc shape with a hole. 12. A first diametrical direction of the connecting member and one ink feeding roller between the two symmetrical positions on the first diameter of the connecting member and the end surface of the one ink feeding roller facing the symmetric portion. Is provided with a first guide means for permitting only relative movement of the connecting member, and two symmetrical points on the second diameter orthogonal to the first diameter of the connecting member and the end surface of the other ink-feeding roller facing the two symmetrical points. 12. An ink supply device for a printing press according to claim 11, further comprising a second guide means provided between the second ink discharge roller and the connecting member, the second guide means permitting only relative movement in the second diametrical direction. . 13. Each guide means is formed in a diametrical slot formed in the connecting member and in the slot of the connecting member so that it can be moved only in the diametrical direction formed in the end face of the ink inking roller. 13. The ink supply device for a printing press according to claim 12, wherein the ink supply device comprises a pin-shaped portion.