JPH0443326Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a printing press, and in particular, the inking device is configured to be detachable from the printing press body, and
The present invention relates to a printing machine in which an ink mixing roller is automatically brought into pressure contact with an ink forming roller when the inking device is mounted on the printing press body.

(Prior art and its problems) In conventional printing presses, an inking device including an ink forming roller, an ink mixing roller, etc. is incorporated and fixed in the printing press body. After removing the ink and cleaning each roller, it is necessary to replenish the ink with another ink, which is a tedious task. Moreover, such work is performed in a complex inking device built into the printing press, which results in poor work efficiency. It was.

In order to solve this problem, if the inking device was made into a unit and could be attached to and detached from the printing press, it would be extremely easy to replace the ink.
Each mechanism in a printing press is interconnected and has a complicated structure, and it has been difficult to separate only the inking device from the printing press.

In particular, the circumference of the ink applicator roller of an inking device is usually made of rubber to improve ink applicability, while the ink mixing roller is made of a hard material such as metal to achieve a uniform ink film. Therefore, if the ink mixing roller is constantly pressed against the ink forming roller, the rubber surface of the ink forming roller may be deformed, causing ink unevenness.

Therefore, when it is unnecessary, it is necessary to release the pressure contact between the ink mixing roller and the ink forming roller. However, if the inking device is made detachable from the printing press body as described above, the ink in the inking unit can be removed. The approach and separation mechanism for the kneading roller and ink forming roller is also separated from the main printing machine mechanism.
A problem arises in that a unique loading/unloading cylinder mechanism must be provided within the inking unit, making the mechanism complicated.

(Purpose of the invention) The present invention solves the above-mentioned problems, has a simple structure, configures an inking device to be detachable from the printing press body, and when the inking device is attached to the printing press body. It is an object of the present invention to provide a printing machine in which the ink mixing roller is automatically pressed into contact with the ink forming roller.

(Means for Achieving the Object) In order to achieve the above object, the printing press according to the present invention has an inking unit that is detachably attached to the printing press body, and the inking unit is capable of applying ink to the plate surface. an ink application roller for transferring the ink, an ink supply means for supplying a predetermined ink in the form of a film to the ink application roller, and an ink mixer that rotates in pressure contact with the ink application roller to uniformize the ink film thickness. The ink mixing roller is held so as to be able to come into contact with and separate from the ink forming roller, and the ink mixing roller is connected to an actuating lever that can be raised and lowered, and is connected to the actuating lever so that the ink mixing roller is moved in conjunction with the lowering and raising movements of the actuating lever. and a link mechanism for bringing the inking unit into and out of pressure contact with the inking roller; The present invention is characterized in that an actuation member is provided that engages with the actuation lever and causes it to fall down.

(Function) When the inking unit is attached to the printing press body, the operating lever provided on the inking unit
The inking roller is engaged with an operating member provided on the printing press body side, and the inking roller is pressed against the inking roller by the link mechanism of the roller operating mechanism.

(Example) An example of this invention will be described by taking the following printing machine as an example.

A. Overall configuration of printing press Figure 1 shows a schematic cross-sectional view of a multicolor offset printing press that is capable of printing on continuous paper. As shown in the figure, a blanket cylinder 2 is disposed approximately in the center of the printing press body 1, and a plate cylinder that can be freely detached from and attached to the blanket cylinder 2 is located at an upper rear position and a lower rear position of the blanket cylinder 2. 3 and 4 are arranged respectively. At the rear of these plate cylinders 3, 4, there are plate supply/discharge units 5, 6 that enable automatic plate supply/discharge to the corresponding plate cylinders 3, 4, and plate supply/discharge units 5, 6 for automatically supplying/discharging plates to/from the corresponding plate cylinders 3, 4, as well as plate supply/discharge units 5, 6 for automatically supplying/discharging plates to/from the corresponding plate cylinders 3, 4. Inking units 7 and 8 for applying ink are removably installed, respectively.
In addition, each plate supply/discharge unit 5, 6 has a plate supply/discharge tray 9,
10 is detachably attached.

On the other hand, at the lower front position of the blanket body 2,
An impression cylinder 11 that can be freely attached to and taken off from the blanket cylinder 2 is disposed, and paper feeding of the continuous paper 12 passed between the impression cylinder 11 and the blanket cylinder 2 is carried out at the rear and front positions of the lower part of the impression cylinder 11. A pin feed tractor 13 and a suction conveyor 14 are respectively provided for control. These pin feed tractor 13 and suction conveyor 14 are connected to the impression cylinder 11 and the blanket cylinder 2.
Continuous paper 12
The continuous paper 12 is configured to be printed by controlling the paper feed intermittently. In addition, in the front position of the printing press body 1, there is a swing guide 15 for storing printed continuous paper 12 in an alternately folded manner, and a continuous paper holder 1 that can be raised and lowered.
A folding machine 17 having 6 is arranged.
Furthermore, an impression cylinder cleaning unit 29 is provided below the impression cylinder 11 to remove dirt from the surface of the impression cylinder.

In addition, at the upper front position of the blanket body 2,
When cleaning the blanket, the blanket body 2
Cleaning liquid supply unit 1 for supplying cleaning liquid to
8 and a wiping unit 19 for wiping off the cleaning liquid are each removably attached.

A main motor 20 is installed in the lower space of the printing press body 1, and the blanket cylinder 2 and suction conveyor 14 are driven by the main motor 20 via, for example, a belt. The cylinder 11 is mechanically interlocked with gears disposed to mesh at one end of each cylinder, forming a drive system using a main motor 20. Drive devices or actuators such as pulse motors and solenoids are attached to the remaining mechanical parts as necessary, and sensors and switches are installed at predetermined and necessary locations as information input means for controlling the drive timing of these drive systems. It is installed.

FIG. 2 schematically shows a control system used in this printing press, in which a microprocessor 21 is connected to external devices 24 to 28 via a control bus 22 and each control section 23. The system program is stored in an external storage device 24 such as a floppy disk, and is given to the microprocessor 21 at the beginning of system startup. The operator gives commands through an operation panel 25 installed on the side of the printing press, and the microprocessor 21 receives necessary information from sensors and switches 26 and 27 to operate the motors and motors according to the system program. The drive system 28 such as a solenoid is operated as appropriate.

The configuration, operation, etc. related to inking will be explained below.

B Inking relationship (a) Configuration (1) Inking unit configuration Figure 3 shows the inking unit 7. In the figure, figure a is a front view of the inking unit, figure b is a top view, figure c is a right side view, and figure d is a front view of the inking unit.
1 is a sectional view, FIG. e is a left side view, and FIG. f is a plan sectional view.

This inking unit 7 is connected to the left and right frames 7.
Opposing side plates 7 of 01,702 (a and b in the same figure)
A framework is constructed by extending connecting shafts 703 and 704 (d in the figure) between 01a and 702a. The left and right frames 701, 702 have side plates 701a, 702.
At the upper end of a, extend the rail pieces 701 outward on both sides.
b, 702b are provided protrudingly, and the side plate 701
Locking pieces 701c and 702c are provided at the front ends of the locking members 701c and 702c so as to protrude outwardly from each other. Also, the side plate 7
At the upper part of the rear end of 01a, 702a, there is a notch 7 cut diagonally toward the lower front in order to engage an inking unit take-off cylinder drive lever (described later).
01d, 702d (d, e in the same figure), and the rear end lower part of the side plates 701a, 702a is connected to the plate cylinder 3.
The arcuate portions 701e and 702e are finished in accordance with the outer diameter of the circular arc portions 701e and 702e. On the front side of the locking pieces 701c, 702c, there are a handle 705, a unit mounting screw 706a,
706b are respectively attached, and the locking pieces 702c
A connector 708 is attached to the back side of the connector 708 via a mounting fitting 707. Further, a pulse motor 709 for controlling the pushing amount of the doctor blade is attached to the outer surface of the side plate 702a, and this pulse motor 70
9 connects to the connector 7 via a cord (not shown)
Connected to 08.

Between the left and right frames 701 and 702, there is a
As shown, a rubber ink applicator roller 710,
Metal kneading rollers 711, 712, rubber auxiliary ink forming roller 713, doctor blade 714
and an eccentric roller 715 are arranged.

The ink forming roller 710 has its roller shaft 71
Both ends of the roller 0a are rotatably supported by bearings 716 attached to predetermined positions on the side plates 701a and 702a, and an inking gear 717 and an ink form roller reversal prevention mechanism 718 are disposed at the right end of the roller shaft 710a. At the same time, the roller shaft 710a
In the right end extension part 710b and the left end extension part 710c,
Bearings 719 for regulating the distance between the shafts are respectively attached. This ink form roller 710 is finished as a two-layer roller consisting of a hard outer layer 710d (see FIG. 3 d) and a soft rubber inner layer 710e so that the deformation of the roller that occurs when the doctor blade 714 is pushed does not concentrate locally. ing.

4a and 4b show detailed views of the ink form roller reversal prevention mechanism 718. As shown in the figure, an inking gear 717 is rotatably attached to the roller shaft 710a, and a ratchet wheel 720 is attached to the roller shaft 710a.
It is connected in a non-rotating state. Inking gear 7
Three fulcrum pins 722 are erected on the outer surface of 17 so as to surround the ratchet wheel 720, and each fulcrum pin 7
22, a ratchet claw 723 whose tip part prevents rotation.
Arms 723 consisting of a are rotatably connected to each other. A spring receiving member 724 is erected at the tip of the arm 723 by a fixing pin 724a.
A tension coil spring 726 is attached between the spring receiving members 724 of adjacent arms 723,
As a result, each arm 723 is urged to rotate inward about the fulcrum pin 722, and the arm 723
The claw portion 723a of is engaged with the ratchet wheel 720.

This reversal prevention mechanism 718, during printing,
When the inking gear 717 is rotationally driven in the counterclockwise direction (positive direction) in FIG. The rotation of the inking gear 717 is transmitted to the roller shaft 710a, and the inking roller 710 is rotated in the forward direction. On the other hand, when printing is canceled, when the inking gear 717 is rotated clockwise in the clockwise direction in FIG. In other words, the inking gear 717 is allowed to idle relative to the ratchet wheel 720, preventing the rotation of the inking gear 717 from being transmitted to the roller shaft 710a, and keeping the inking roller 710 in a stopped state. That is,
During printing, this reversal prevention mechanism 718
It functions to transmit the rotation of the inking gear 717 to the ink forming roller 710, and functions to prevent the ink forming roller 710 from reversing when printing is canceled.

Returning to FIG. 3 again, the kneading roller 711 connects both ends of its roller shaft 711a to side plates 701a and 701a.
Bearing 727 attached to 02a (Fig. 3c,
f) is rotatably and swingably supported in the roller axial direction, and similarly, other kneading rollers 712
Also, connect both ends of the roller shaft 712a to the side plate 701.
It is rotatably supported by a bearing 728 attached to a, 702a and swingable in the roller axial direction.

The kneading rollers 711 and 712 are oscillated in the roller axial direction in conjunction with the rotation of the ink forming roller 710. The mechanism is as follows. That is, as shown in FIG.
9,730 are installed respectively. On the other hand, a gear 731 is attached to the left end of the roller shaft 710a of the ink form roller 710, and a cam 733 having a gear 732 that meshes with this gear 731 is attached to the side plate 70.
It is held rotatably about a fulcrum pin 734' protruding from 1a. The cam 733 has a circumferential groove 733a formed on its outer circumference that is inclined with respect to the cam axis direction. Then, the circumferential groove 733a of the cam 733
and circumferential grooves 729a, 730 of cams 729, 730.
Cam followers 734 and 735 are attached to span between a and a, respectively, and the central portions of these cam followers 734 and 735 are rotatably supported by bearings 736 and 737 supported by the side plate 701a, respectively.

According to this swing mechanism, the ink forming roller 71
0 is rotationally driven, the cam 733 rotates via the gears 731 and 732, and as the cam 733 rotates, the cam follower 7 is rotated by the action of the circumferential groove 733a.
34 and 735 swing around bearings 736 and 737 to swing the cams 729 and 730 in the axial direction of the rollers, thereby swinging the kneading rollers 711 and 712 in the axial direction of the rollers.

On the other hand, bearings 727, 728 (FIG. 3 c, f) for supporting the kneading rollers 711, 712 are rotatably attached to the side plates 701a, 702a using bolts 738, 739 as fulcrums, respectively. But each link 74
It is connected to the actuation lever 742 via 0,741. This operating lever 742 is connected to a fulcrum pin 743
It is rotatably attached to the side plates 701a and 702a using the rail piece 701 as a fulcrum, and its upper end
slit 744 (third
The rail pieces 701b and 7 pass through the figure b) from below.
02b, and a spring locking recess 742a is formed at the upper end of the projection.

When this spring locking recess 742a is pushed to the left in FIG.
The bearing 727 rotates counterclockwise around the bolt 738 via the link 740 as a fulcrum, and the circumference of the kneading roller 711 connects with the circumference of the ink form roller 710 and the auxiliary ink form roller 713. It is pressed against the circumference of the trunk. at the same time,
The bearing 728 is connected to the bolt 739 via the link 741.
The kneading roller 7 is rotated clockwise around the fulcrum.
The twelve circumferential bodies are pressed against the circumferential body of the inking roller 710. During printing, in the above pressing state, the kneading rollers 711 and 712 rotate while swinging in the roller axial direction as the ink form roller 710 rotates, thereby making the ink film thickness on the ink form roller 710 uniform. perform an action. When the spring locking recess 742a is released from the pressed state in the above-mentioned pressed state, the elastic force of the rubber of the ink forming roller 710 pushes the mixing rollers 711, 712 back to their original positions, and the ink forming rollers 712 of the mixing rollers 711, 712 are pushed back to their original positions. The pressing force against is released.

The auxiliary ink application roller 713 has both ends of its roller shaft 713a (FIG. 3 c, e) attached to the side plate 701.
Bearing 74 attached to a predetermined position of a, 702a
5 is rotatably supported. This auxiliary ink applicator roller 713 kneads its peripheral body with roller 7
11, and is configured to transfer the ink on the ink applicator roller 710 to the auxiliary ink applicator roller 713 via the kneading roller 711.

The doctor blade 714 has pivot bearings 74 attached at both ends to frame side plates 701a and 702a so that it can move forward and backward in the left and right directions in FIG. 3d.
6 (FIG. 3a), and the space surrounded by the front surface of this doctor blade 714 and the upper surface of the ink form roller 710 is defined as an ink reservoir space 747. Frame side plates 701a, 70
A pair of support fittings 748 are attached to the connecting shaft 704 extending between 2a at a predetermined interval in the left-right direction, and a pair of eccentric rollers 715 are held on these support fittings 748 at a predetermined interval in the left-right direction. Ru.

As shown in FIGS. 3a and 3b, the eccentric roller 715 has a bearing structure in which an outer ring 715c is rotatably attached to the outer circumference of an inner ring 715a via balls 715b, and the inner rings 715 of both eccentric rollers 715
a are connected to each other by a connecting shaft 749. In this case, the inner ring 715a, the outer ring 715c, and the connecting shaft 749
The centers of rotation of are arranged to coincide with each other. Further, a rotational drive shaft 750 is connected to the outer surface of the inner ring 715a of both eccentric rollers 715. The axial center of this rotary drive shaft 750 is eccentric with respect to the rotation centers of the eccentric roller 715 and the connecting shaft 749, and this rotary drive shaft 750 is rotatably held by a bearing 751 provided on the support fitting 748.
The rotational drive of this rotary drive shaft 750 is performed by a pulse motor 7 connected to its right end via a shaft coupling 752.
09.

The rotation drive shaft 75 is driven by the pulse motor 709.
0 is rotationally driven within a predetermined range in the counterclockwise direction in FIG. The outer ring 715c of the eccentric roller 715 presses its outer peripheral surface against the back surface of the doctor blade 714 to eccentrically move its center position while restricting its rotation, and the doctor blade 714 is pushed to the left in FIG. 3d.

Conversely, if the rotary drive shaft 750 is rotationally driven within a predetermined range in the clockwise direction in FIG. 3d, the outer ring 715c of the eccentric roller 715 moves to the right in FIG. 3d, contrary to the above, and the doctor blade 714 is pushed back to the right in FIG. 3d with its back surface being pressed against the pushing member 715 by the elastic force of the rubber of the ink forming roller 710. Therefore, the pulse motor 7
09, by controlling the amount of rotation of the rotary drive shaft 750, it is possible to adjust the amount of pushing of the doctor blade 714 into the inking roller 710. The configuration is such that the pushing amount of the blade 714 is controlled.

FIG. 5 is a sectional view and a front view of a main part of the inking unit 7, showing a mechanism necessary for controlling the amount of depression of the doctor blade 714. As shown in the figure, the origin detection cam 7 is attached to the rotational drive shaft 750.
53 and a pushing limit detection cam 754 are attached,
A limit switch 755 for detecting the origin and a limit switch 756 for detecting the pushing limit, which are operated by these cams 753 and 754, are attached to the support fitting 748 via a fitting 757. These limit switches 755, 756 are electrically connected to a connector 708 shown in FIG. 3b.

(2) Configuration of the installation side of the inking unit Next, the configuration of the installation side of the inking unit 7 will be explained. FIG. 6 shows a rear view of the printing press main body 1 before the inking unit 7 is attached, and FIG. 7 shows a sectional view taken along the line -- in FIG.

First, the plate cylinder gear 301 is fixed to the right end of the plate cylinder 3, and the plate cylinder 3 and the plate cylinder gear 301 are connected to the plate cylinder support shaft 3.
02 and is rotatably held. Plate cylinder support shaft 302
As shown in FIG.
03a are provided, and these eccentric shafts 303 are connected to the left and right side plates 101 of the printing press body 1,
It is rotatably held by a bearing 304 attached to 102. This rotational drive of the plate cylinder 3 is driven by the plate cylinder gear 3.
01 is engaged with a blanket cylinder gear (not shown) provided at the right end of the blanket cylinder 2, and the blanket cylinder 2 of the plate cylinder 3 is
The detachment and detachment of the cylinder is performed by driving the eccentric shaft 303 to rotate forward and backward within a certain angle using, for example, a pulse motor.

A pair of center distance regulating members 305 are arranged on both sides of the plate cylinder 3. Center distance regulating member 305
is rotatably held at its lower end by a plate cylinder support shaft 302, and a bearing holding recess 305a for holding an interaxial distance regulating bearing 719 of the inking unit 7 is formed at its upper end. In addition, the center distance regulating member 305 has a positioning pin insertion hole 305b formed at a substantially intermediate position, and the positioning pin 103 protruding from the inner surfaces of the left and right side plates 101 and 102 is passed through the positioning pin insertion hole 305b. and is configured to maintain a constant posture. In this case, the hole diameter of the positioning pin insertion hole 305b is set to be larger than the shaft diameter of the positioning pin 103 so as not to hinder the movement of the plate cylinder 3 due to the eccentric rotation of the plate cylinder support shaft 302. ing.

On the other hand, on the inner surfaces of the left and right side plates 101, 102,
Rail receiving pieces 104 and 105, which function as mounting guides for the inking unit 7, are mounted at opposing positions. As shown in FIG.
6 is attached by a screw 107, and its spring tip 106a is arranged at a position where it engages with the operating lever 742 when the inking unit 7 is installed. A torsion coil spring 108 is similarly attached to the upper surface of the rail receiving piece 104. In addition, at the front end of the upper surface of the rail receiving pieces 104, 105,
The locking member 109 is attached, and the notch lower surface 1
09a, the rail piece 701 of the inking unit 7
The inking unit 7 can be held in the drawn state by engaging the upper surfaces of the rear ends of the inking units 702b and 702b.

Moreover, on the inner surfaces of the left and right side plates 101, 102,
A pair of inking unit support arms 110,1
11 is rotatably attached around a bolt 112 as a fulcrum, and the rotation range of these support arms 110, 111 is controlled by rotation regulating members 113 protruding from the inner surfaces of the left and right side plates 101, 102, so that the inking unit 7 can be attached and detached. It is regulated within a certain range that does not interfere with trunk movement. In addition, the position of the bolt 112,
In other words, the center of rotation of the support arms 110, 111 is at the pressure angle α shown in FIG.
14.50°), so that when the inking unit 7 is installed, the inking gear 717 is rotated by the rotational drive of the plate cylinder gear 301.
is configured to be biased in the direction of meshing with the plate cylinder gear 301. These support arms 110, 11
1, there are screw holes 1 corresponding to the unit mounting screws 706a and 706b of the inking unit 7.
14 is formed. In addition, the support arm 111 includes
A limit switch 115 for detecting completion of installation of the inking unit 7 is installed above the screw hole 114, and a mounting bracket 116 is installed.
Connector 117 is attached via. This connector 117 is connected to the microprocessor 21 via the control section 23 shown in FIG.

On the other hand, at rear positions of the rail receiving pieces 104 and 105, a pair of take-off cylinder drive levers 118 for performing the take-off cylinder operation of the inking unit 7 are arranged at a predetermined interval in the left-right direction. These loading and unloading cylinder drive levers 118 have a bearing 118a that can be engaged with the notches 701d and 702d of the inking unit 7 at their tips, and a base end that connects to the drive shaft 118.
The drive shaft 119 connects both ends of the
Bearings 12 attached to left and right side plates 101, 102
It is rotatably held at 0. A link 121 shown in FIG. 10 is connected to the right end of the drive shaft 119 on the outside of the right side plate 102.
Spring 122 for biasing rotation of 1 in the clockwise direction
is spanned between one end of the link 121 and the right side plate 102, and a solenoid 123 for rotationally driving the link 121 in the counterclockwise direction is attached to the right side plate 102.
02, and the other end of the solenoid 123 and the link 121 are connected by a spring 124.
Further, a stopper 125 for regulating the rotation range of the link 121 is attached to the right side plate 102.
When this solenoid 123 is energized, the link 121 is rotationally driven in the counterclockwise direction in FIG.
It is set to the position where it is mounted on the body and activated. Then, when the solenoid 123 is de-energized, the spring 1
The link 121 rotates back in the clockwise direction in FIG.
8 also rotates clockwise and the inking unit 7
Return to the position where the body is released.

(b) Installation of the inking unit Next, attach the inking unit 7 to the printing press body 1.
This section explains the procedure for installing the device. This mounting is performed with each cylinder in the printing press body 1 in a separated state. That is, the plate cylinder 3 is in a detached state from the blanket cylinder 2, and the detachment cylinder lever 118 for driving the inking unit 7 is also in the detachment operating position (7th position).
(clockwise rotation position shown).

To install the inking unit 7, hold the handle 705 with both hands, lift the inking unit 7, and remove the rail piece 701 of the inking unit 7.
The rear ends of b and 702b are suspended on the front ends of the rail receiving pieces 104 and 105 of the printing press main body 1, and the rail pieces 7
01b, 702b are slid along the rail receiving pieces 104, 105 and pushed into the back of the printing press main body 1. When the inking unit 7 is pushed all the way into the printing press body 1, as shown in FIG.
The bearing 118a of the take-off barrel lever 118 engages with the notches 701d and 702d of the inking unit 7, and the rear end of the inking unit 7 is slightly lifted upward, thereby causing the rail pieces 701b,
The rear end of 702b rises from the rail receiving pieces 104, 105. Next, when the mounting screws 706a and 706b of the inking unit 7 are tightened and fixed in the screw holes 114 of the inking unit support arms 110 and 111, the locking pieces 701c and 702c of the inking unit 7 are moved slightly upward with the bolt 112 as a fulcrum. The front ends of the rail pieces 701b, 702b also rise from the rail receiving pieces 104, 105. In this way, the rail pieces 701b, 702b are connected to the rail receiving pieces 104, 1
By being placed apart above the 05,
The next loading operation of the inking unit 7 becomes possible.

When the inking unit 7 is installed in this way, the limit switch 115 is moved to the locking piece 702.
c is pressed and turned on, and the inking unit installation detection signal is sent to the microprocessor 21 (second
(Figure). Also, inking unit 7
Connector 708 attached to support arm 1
11, and the motor and switches of the inking unit 7 are electrically connected to the microprocessor 21 (FIG. 2). Further, the operating levers 742 provided on both sides of the inking unit 7 are connected to the rail receiving piece 1.
Spring 106, 108 provided on 04, 105 side
The kneading rollers 711 and 712 are rotated so as to lie down in the counterclockwise direction in FIG.
is pressed with a predetermined pressure. Further, the inking gear 717 meshes with the plate cylinder gear 301, and the inter-axis distance regulating bearing 719 is disposed facing above the bearing holding recess 305a of the inter-axis distance regulating member 305.

The inking unit 7 can be removed by following the procedure reverse to the installation procedure. When the inking unit 7 is removed, the connection between the connectors 708 and 117 is released, the limit switch 115 is turned off, the operating lever 742 returns to the upright position, and the inking rollers 710 of the mixing rollers 711 and 712
The pressing force is released.

The inking unit 8 has the same structure as the inking unit 7, and its installation and removal operations are performed in the same manner as the inking unit 7.

(C) Operation () Operation of the inking unit to separate the ink forming roller 710 from the plate cylinder 3 The inking unit 7 installed in the printing press main body 1 separates the ink forming roller 710 from the plate cylinder 3 during plate feeding and discharging, cleaning the blanket cylinder, etc. Conversely, during printing, it is necessary to attach the inking roller 710 to the plate cylinder 3.

Such an operation of the inking unit 7 is carried out through the notches 701d and 701d of the inking unit 7.
This is done by controlling the rotation of the detachment cylinder drive lever 118, which is engaged with the lever 02d, by a solenoid 123 shown in FIG. That is, in order to attach the inking unit 7, the solenoid 123 is
energize. As a result, the link 121 rotates in the counterclockwise direction in FIG. 10, the lever 118 similarly rotates in the counterclockwise direction in FIG. The ink forming roller 710 and the auxiliary ink forming roller 713 are rotated clockwise in FIG. In this case, inking unit 7
The inter-axle distance regulating bearing 719 is locked in the bearing holding recess 305a of the inter-axle distance regulating member 305, and the roller shaft 7 of the ink form roller 710 is
The distance between the ink forming roller 710 and the plate cylinder 3 is maintained at a constant distance between the ink forming roller 710 and the plate cylinder 3 during printing. In order to cause the inking unit 7 to perform a cylinder separation operation, it is sufficient to de-energize the solenoid 123 shown in FIG. 10. When the solenoid 123 is de-energized, the lever 118 shown in FIG. 11 rotates clockwise, and the inking unit 7 is separated from the plate cylinder 3 by the reverse operation.

The movement of the inking unit 8 (FIG. 1) to and from the plate cylinder 4 is performed in the same manner as the inking unit 7.

() Regular printing operation of the inking unit Regular printing is performed with the inking unit 7 (the same applies to the inking unit 8) mounted on the plate cylinder 3. During this regular printing,
As shown in FIG. 12, since the plate cylinder 3 is rotationally driven in the counterclockwise direction, the plate cylinder gear 301 (FIG. 11)
The ink forming roller 710 is rotationally driven in the clockwise direction (positive direction) in FIG.
10, the kneading rollers 711 and 712 rotate in the counterclockwise direction while swinging in the axial direction, and the auxiliary ink forming roller 713 is rotationally driven in the clockwise direction.

As a result, the ink 758 accommodated in the ink reservoir space 747 forms an ink film with a film thickness corresponding to the pushing amount of the cutting edge 714a of the doctor blade 714 in the area immediately after the doctor blade 714 has passed on the surface of the circumference of the ink form roller 710. A film is formed, and after the film thickness of this ink film is made uniform by a kneading roller 711 that swings in the axial direction, it is inked onto the printing line portion of the plate wound around the plate cylinder 3.
The remaining ink on the ink applicator roller 710 is again made uniform in film thickness by the kneading roller 712, and is applied again to the plate on the plate cylinder 3 via the auxiliary ink applicator roller 713. Kneading roller 712
The ink that has not been transferred to the ink is collected in the ink reservoir space 747 and reused for the next printing.

() Doctor blade pushing amount control operation Next, the pushing amount control operation of the doctor blade 714 will be explained. FIG. 13 shows the doctor blade 71 as the eccentric roller 715 rotates eccentrically.
FIG. 4 is a diagram showing the pushing operation of No. 4; Figure a shows the state before the pushing operation. From this state, the eccentric roller 7
15 rotates eccentrically in the counterclockwise direction, the doctor blade 714 touches the ink form roller 710 at the rotational position shown in FIG. (see figure c), and is pushed to a predetermined push-in limit position at the rotational position shown in figure d. Further, as the eccentric rotation continues, the amount of pushing into the ink forming roller 710 reaches the maximum amount, as shown in e of the figure.

The principle of the push-in operation has been explained above, but in the above embodiment, the push-in operation is controlled by the microprocessor 21 (FIG. 2) so that the push-in operation is performed within the range from b to d in the figure. . for that,
The rotation position shown in figure b is set to the origin position, and the figure d is set to the origin position.
The rotational position of is set as the pushing limit point. Then, there are sensors for detecting the origin position and the pushing limit point, that is, a limit switch 755 for detecting the origin and a limit switch 756 for detecting the pushing limit.
As shown in FIG. 5, a cam 753 for detecting the origin and a cam 754 for detecting the pushing limit are mounted at a position facing the rotary drive shaft 750, and are used to operate the limit switches 755, 756.
is attached to the rotary drive shaft 750. In this case, the origin detection limit switch 755
The push-in limit detection limit switch 756 is configured to be turned on only within the rotational range shown in FIGS. 3a to 3b, and the push limit switch 756 is turned on only within the rotational range shown in FIGS. 13d to 13e. FIG. 14 shows the limit switch 75
5,756 is a diagram showing the relationship between the operating state of the blade and the pushing state of the blade. As described above, the rotational drive shaft 750, in other words, the rotational drive of the eccentric roller 715 is controlled by the microprocessor 21.
(Figure 2) Pulse motor 709 controlled by
(Fig. 3b).

FIG. 15 is a flowchart showing the pressing amount control operation performed by the microprocessor 21 (FIG. 2) when the inking unit 7 (the same applies to the inking unit 8) is installed. When the inking unit 7 is installed, first in step S1 it is determined whether the origin detection limit switch 755 is "on". now,
Assuming that the eccentric roller 715 is in the rotational position within the range of FIGS. 13a to 13b, the origin detection limit switch 755 is turned on as shown in FIG. 14, so the process proceeds to step S2. The pulse motor 709 is rotated in the pushing direction (counterclockwise direction in FIG. 13) by 10 pulses (in this embodiment, it is set to push in 0.05 mm with 45 pulses). After that, the process returns to step S1 again, and the operating state of the origin detection limit switch 755 is determined again, and the rotational position of the eccentric roller 715 is changed to the origin position (see FIG. 13) until the limit switch 755 is turned off. The above operation is repeated until b) is exceeded.

In this way, if the rotational position of the eccentric roller 715 exceeds the origin position, or if the rotational position of the eccentric roller has exceeded the origin position from the beginning, the step
Proceeding to S3, the pulse motor 709 is rotated in the pullback direction (clockwise direction in FIG. 13) by one pulse. As a result, the doctor blade 714 is pulled back by one pulse due to the elastic force of the rubber of the ink forming roller 710, and the process proceeds to step S4.

In step S4, it is determined again whether or not the origin detection limit switch 755 is turned on, and if it is still turned off, the step is repeated.
Return to S3, limit switch 75 for origin detection
5 is turned on, in other words, the rotational position of the eccentric roller 715 is at the origin position (FIG. 13b).
The above operation is repeated until .

In this way, when the eccentric roller 715 reaches the home position, the process proceeds to step S5, where the pushing operation is performed by a preset number of pulses by the pulse motor 709, for example, as shown in FIG. 714 is pushed into the standard pushed position. It goes without saying that this standard push-in position can be changed as appropriate by setting the specified number of pulses to an appropriate value.

FIGS. 16 and 17 show how the operator presses the operation panel 25 (on the screen) when the desired print density cannot be obtained with the standard pushing position of the doctor blade 714 set by installing the inking unit 7. 2) is a flowchart showing the operation of the microprocessor 21 in conjunction with the input operation of the "push key" or "pull back key" in FIG. 2).

In other words, when the "push key" is pressed,
In step S6, it is determined whether the push limit detection limit switch 756 is "on" or not.
When it is "on", that is, when the rotational position of the eccentric roller 715 is at the pushing limit or exceeding the pushing limit (states d to e in FIG. 13), it is necessary to prohibit further pushing. Proceed to step S7, sound the buzzer and end the work. on the other hand,
If it is determined in step S6 that the pushing limit has not been exceeded, the process proceeds to step S8, where the pulse motor 709 performs a pushing operation for one pulse. Next, the process advances to step S9, where it is determined whether or not the pushing operation for 45 pulses (corresponding to the pushing amount of 0.05 mm) has been performed.If the pushing operation for 45 pulses has not been performed, the process returns to step S6. Go back and continue until the pushing operation for 45 pulses is completed.
Repeat the above steps. In this way, the doctor blade 714 performs the pushing operation for 45 pulses.
When pushed in 0.05mm, the work is finished. In this way, since the doctor blade 714 is pushed in by 0.05 mm with one key operation, in order to obtain the desired pushing amount, it is only necessary to perform the key operation the corresponding number of times.

On the other hand, when the "pull back key" is pressed, in step S10, it is determined whether the limit switch 755 for detecting the origin is "ON" or not.
In this case, that is, when the rotational position of the eccentric roller 715 is at or beyond the origin position (state of Fig. 13b-a), it is necessary to prohibit further retraction, so the process proceeds to step S11, where the buzzer sounds and the process ends. On the other hand, if the origin detection limit switch 755 is "off" in step S10, the process proceeds to step S12, where the pulse motor 709 performs a retraction operation by one pulse. Next, the process proceeds to step S13, where it is determined whether or not a retraction operation of 45 pulses (corresponding to a retraction amount of 0.05 mm) has been performed, and if a retraction operation of 45 pulses has not been performed, the process proceeds to step S14 again.
Returning to S10, the above operation is repeated until the doctor blade 714 has been pulled back by 0.05 mm after the 45 pulses of pulling back operation have been performed, and the operation is completed.
This pull back operation can be performed in 0.05 mm increments with a single key operation.
Since the doctor blade 714 is pulled back only by
To obtain the desired pullback amount, you simply press the key the corresponding number of times. Here, the amount of blade movement per key operation is set to 0.05 mm (equivalent to 45 pulses), but this value can of course be changed.

In this way, the rotation amount of the eccentric roller 715 that is eccentric with respect to the rotational drive shaft 750 is controlled by the pulse motor 709.
Since the pushing amount of the doctor blade 714 against the ink forming roller 710 can be adjusted by controlling, the pushing amount can be finely adjusted with a simple structure and simple operation.In other words, the ink film thickness on the ink forming roller 710 can be adjusted using a simple structure. It is possible to make fine adjustments and control the print density with high precision.
In addition, the phase of the eccentric roller 715 is selected so that as the amount of pushing increases, the leg of the moment acting around the rotary drive shaft 750 due to the repulsive force from the ink form roller 710 becomes shorter.
By increasing the pushing amount, the ink forming roller 71
Even if the reaction force from 0 becomes large, the eccentric roller 71
There is no problem in rotating 5 with a pulse motor. Moreover, since the rotation angle per pulse of the eccentric roller 715 is constant, if the eccentric roller 715 is used in the direction where the moment leg becomes shorter as described above,
In the vicinity of the rotation angle at which print density control is performed, the amount of pushing can be finely adjusted with respect to changes in the rotation angle.
Furthermore, as shown in FIG. 13e, since the mechanical push-in limit position is located at a position slightly pushed in beyond the push-in limit detection, even if the rotary drive shaft 750 operates abnormally, the ink form roller 710 There is no need to worry about causing irreparable dents.

(d) Effect of the two-layer structure of the ink form roller As shown in Fig. 3d, the ink form roller 71
0 has a two-layer structure in which the outer layer 710d is hard and the inner layer 710e is soft. FIG. 18 is a diagram showing a deformed state of the ink forming roller 710 due to pushing. However, in FIG. 18, the aspect ratio is changed to make it easier to understand the deformed state. In the figure, curve A shows the shape of the ink form roller 710 when it is stationary without pushing in the doctor blade 714, and curve B shows the shape of the ink form roller 710 when it is stationary.
10 shows the roller deformation when the doctor blade 714 is pushed in by a predetermined amount, and curve C shows the roller deformation when the ink form roller 710 is rotated with the doctor blade 714 kept in the pushed-in position. show. As shown by the above curve C, when an ink forming roller 710 having a two-layer structure in which the surface layer is made of harder rubber than the inner layer is used as the ink forming roller, the roller 710
When the doctor blade 714 is pressed against the doctor blade 714, the deformation of the roller 710 extends to the inside of the roller, thereby further preventing local deformation as in the case of a roller.In other words, the deformation of the roller 710 causes the pressing part P of the doctor blade 714 to Since it spreads over the entire area from the center, it is possible to reduce unevenness in the thickness of the ink film formed on the surface of the ink form roller 710, and it is possible to form an ink film with a uniform thickness in the roller axis direction (width direction).

FIG. 19 is a characteristic diagram showing, as an example, the relationship between the number of rotations of the ink forming roller, the amount of depression of the doctor blade, and the thickness of the ink film. What can be seen from this figure is that the ink film thickness is 0.2
It changes gradually from 10 μm to 5 μm within the range of ~0.5 mm, and is almost unaffected by the number of rotations of the inking roller. In other words,
By setting the doctor blade pushing amount within the above range, it becomes possible to form a stable and easily controllable ink film.

The material for the ink forming roller 710 may be, for example, natural rubber, synthetic rubber, thermoplastic polymer elastomer, or the like. Now, to give a specific example, an ink forming roller 710 with a diameter of 60.5 mm
The diameter of the roller shaft 710a is 20 mm, and the inner layer 7 made of nitrile rubber with a thickness of 15 mm and a rubber hardness of 20 degrees is fixed to the outer periphery of the roller shaft 710a.
10e, and an outer layer 710d made of nitrile rubber with a thickness of 5.25 mm and a rubber hardness of 30 degrees, which is fixedly formed on the outer periphery of the inner layer 710e.

In the above embodiment, the ink forming roller 71
0 has a two-layer structure, but the ink form roller is not necessarily limited to only a two-layer structure.In short, it is a multi-layer structure in which the surface layer is harder than the inner layer. Any structure is fine.

(e) Effect of the ink form roller reversal prevention mechanism The action of the reversal prevention mechanism 718 shown in FIG. Only rotation in the counterclockwise direction (positive direction) in FIG. 4a is transmitted to the inking roller shaft 710a, and transmission of rotation in the clockwise direction (reverse direction) is blocked. Therefore, during printing, when the inking gear 717 is rotationally driven in the counterclockwise direction (positive direction) by the plate cylinder gear 301, the inking roller 710 is rotated in the normal direction to perform a steady printing operation. be able to. On the other hand, when printing is stopped, if the plate cylinder 3 is manually rotated in the opposite direction to the rotation direction during printing due to operator error or for maintenance, inspection, etc., the plate cylinder gear 301 king gear 7
17 will be rotationally driven in the clockwise direction (reverse direction), but in this case, the inking gear 717
Since the rotation of the ink form roller 710a is not transmitted to the ink form roller shaft 710a, the ink form roller 710 remains in a stopped state (that is, the ink form roller 710 maintains a stopped state by receiving the pressing force of the doctor blade 714), and the ink form roller 710 is rotated in the opposite direction. Rotation is inhibited to prevent a large amount of ink from being transferred to the printing plate. Furthermore, during normal rotation, the gear mechanism rotates the inking roller 710 smoothly, allowing normal inking.

In the above embodiment, the rotation of the inking gear 717 in the positive direction is controlled by the inking roller shaft 71.
A one-way rotation transmission mechanism that transmits rotation to 0a and prevents rotation transmission in the opposite direction includes a ratchet wheel 720 and a pawl portion 7.
23a, a spring 726, etc., but it goes without saying that the one-way rotation transmission mechanism is not limited to the above configuration. Further, this ink form roller reversal prevention mechanism is applicable not only to a doctor blade type printing machine as in the above embodiment, but also to a reverse roller type printing machine.

(f) Effect of the kneading roller pressing force applying/releasing mechanism King unit installation work
As explained in . That is, when the inking unit 7 is installed in the printing press main body 1,
The operating levers 742 provided on both sides of the inking unit 7 are pushed by the springs 106 and 108 to
It is rotated so as to lie down in the counterclockwise direction in Figure 1a,
The kneading roller 711,
712 is pressed against the ink forming roller 710 with a predetermined pressure. Thereby, during printing, the thickness of the ink film on the ink forming roller 710 can be made uniform by the kneading rollers 711 and 712. On the other hand, after printing is completed, the inking unit 7
When removed from the printing press body 1, the springs 106, 10
8 releases the pressing force of the actuating lever 742, the elastic force of the rubber of the ink forming roller 710 pushes the mixing rollers 711, 712 back to their original positions, and the pressing force of the mixing rollers 711, 712 against the ink forming roller 710 is reduced. is canceled. Thereby, even if the inking unit 7 is left in that state for a long period of time, permanent deformation of the inking roller 710 can be prevented.

As described above, according to this kneading roller pressing force applying/releasing mechanism, the kneading rollers 711 and 712 are automatically attached to the ink forming roller 710 in conjunction with the setting and unsetting operations of the inking unit 7 to the printing press main body 1. In other words, the kneading rollers 711, 712
No special work is required for pressure welding and pressure release, which simplifies the work.

In addition, in the above embodiment, the kneading roller 71
1,712 to the ink forming roller 710, the roller operating mechanism is connected to the operating lever 742.
Although the roller operating mechanism is configured by a link mechanism consisting of links 740, 741, etc., it is free to adopt a configuration other than the above-mentioned configuration as the roller operating mechanism. Also,
Although springs 106 and 108 are used as operating members for operating the roller operating mechanism, structures other than the springs 106 and 108 may be freely adopted.

(g) Effect of the center distance regulating member The effect of the center distance regulating member 305 shown in FIG. Lever 118
Accordingly, when the inking unit 7 is rotated toward the plate cylinder 3 using the bolt 112 as a fulcrum and the ink form roller 710 and the auxiliary ink form roller 713 are attached to the plate cylinder 3, the distance between the axes of the inking unit 7 is The regulating bearing 719 is locked in the bearing holding recess 305a of the inter-axle distance regulating member 305, and the roller shaft 71 of the ink form roller 710 is locked.
The distance between Oa and the plate cylinder support shaft 302 is kept constant. This allows the ink forming roller 710 and the auxiliary ink forming roller 713 to
and the contact pressure with the plate cylinder 3 (in other words, the nip width)
can be maintained at a constant value that is optimal for ink transfer. (The function of the auxiliary ink forming roller 713 is the same as that of the ink forming roller 710, so
The ink forming roller 710 will be described below as a representative example. ) To be more detailed, the center distance regulating member 305
is the roller shaft 710a of the ink forming roller 710
Since the distance between the cylinder support shaft 302 and the cylinder support shaft 302 is directly regulated, the distance between the cylinders and the plate cylinder support shaft 302 is not influenced at all by the timing of loading and unloading the blanket cylinder 2 (FIG. 1), the plate cylinder 3, and the ink form roller 710. The inking pressure between the ink forming roller 710 and the plate cylinder 3 can always be kept constant. For example, in order to efficiently control ink density at the beginning of printing and at the end of printing, the ink forming roller 710 is connected to the plate cylinder 3.
The inking roller 710 can be moved to and from the blanket cylinder 2 while the plate cylinder 3 is attached to the blanket cylinder 2, or the ink form roller 710 can be detached from the plate cylinder 3 which is set at the blanket cylinder 2. Furthermore, even when the inking roller 710 is moved to and from the plate cylinder 3 which is set at the detached position with respect to the blanket cylinder 2, the center-to-axis distance regulating member 305 allows The ink application pressure between the ink forming roller 710 and the plate cylinder 3 can be kept constant at all times, so that good ink transfer to the plate surface can be realized and printing performance can be improved.

Note that the inter-axis distance regulating member 305 is not limited to the above configuration, and the ink forming roller 71
Any structure may be used as long as it can keep the bonding pressure between the plate cylinder 3 and the plate cylinder 3 constant.

(Effects of the invention) As described above, according to the printing machine according to the invention,
Since the inking unit is configured to be detachable from the printer body, ink replacement and maintenance of the inking device are extremely easy.Moreover, the inking unit has a link mechanism that allows ink to be injected in conjunction with the lowering and raising movements of the operating lever. A roller operating mechanism is provided that presses and releases the kneading roller from the inking roller, so when the inking unit is installed in the printing press body, the operating lever is engaged with the operating member provided on the printing press body. The pressing operation can be performed by laying down the material.

As a result, with an extremely simple structure, the ink mixing roller can be automatically pressed against the ink forming roller in conjunction with the installation of the inking unit, and there is no need to manually operate the pressing operation, improving work efficiency. You can improve your performance.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view of a printing press that is an embodiment of this invention, Fig. 2 is a schematic diagram showing the control system used in the printing press, Fig. 3 is a configuration diagram of the inking unit, and Fig. 4 Figure 5 is a configuration diagram of the ink form roller reversal prevention mechanism, Figure 5 is a configuration diagram of the main parts of the inking unit, Figure 6 is a partial rear view of the printing press body before the inking unit is installed, and Figure 7 is Figure 6. −
Line sectional view, Figure 8 is a diagram showing a mechanism in which the plate cylinder support shaft is eccentrically rotatably supported by the printing press body, Figure 9
The figure is a plan view showing the area centered on the rail receiver of the main body of the printing press, Figure 10 is a diagram showing the drive mechanism of the inking unit take-off cylinder drive lever, and Figure 11 is a diagram showing the installed state of the inking unit. 12 is a diagram explaining the steady printing operation of the inking unit, FIG. 13 is a diagram explaining the pushing operation of the doctor blade, and FIG. 14 is a diagram showing the operating status of the limit switch for origin detection and the limit switch for pushing limit detection. A diagram showing the relationship with the pushing state of the blade, Fig. 15 is a flowchart showing the operation to control the pushing amount of the doctor blade performed when the inking unit is installed, and Fig. 16 shows the case when a pushing command is given by the operator. FIG. 17 is a flowchart showing the operation to control the pushing amount of the doctor blade performed when a pull-back command is given by the operator. FIG. Diagram showing the deformed state of the ink form roller, 1st
FIG. 9 is a characteristic diagram showing the relationship between the number of rotations of the ink forming roller, the amount of blade pushing, and the ink film thickness. 1... Printing machine main body, 7... Inking unit, 106, 108... Spring, 710... Ink forming roller, 711, 712... Kneading roller, 7
40,741...link, 742...operating lever.

Claims (1)

[Scope of Claim for Utility Model Registration] In a printing press in which an inking unit is detachably attached to a printing press body, the inking unit includes an ink applicator roller for transferring ink onto a printing plate, and a predetermined unit attached to the ink applicator roller. an ink supplying means for supplying ink in a film form; an ink mixing roller that rotates in pressure contact with the ink forming roller to uniformize the ink film thickness; and an ink mixing roller that moves toward and away from the ink forming roller. It consists of an actuating lever that can be held and raised freely, and a link mechanism that is connected to this actuating lever and that presses and releases the ink mixing roller from the ink forming roller in conjunction with the lowering and raising movements of the actuating lever. a roller actuation mechanism, and an actuation member is provided on the printing press main body side to engage with the actuation lever and lower it when the inking unit is inserted into a predetermined device position of the printing press main body. A printing machine characterized by: