JPH0371983B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a multicolor printing press, and more particularly to a multicolor printing press that performs printing using a waterless plate.

(Prior art and its problems) In conventional multicolor printing machines with multiple plate cylinders, the plate cylinders are arranged close to each other due to their structure, so dampening water is placed around each plate cylinder. It is not possible to take up space for arranging the inking device, the inking device, and the plate supply/discharge device at the same time. For example, JP-A-57-
No. 165264, JP-A-54-152504 and JP-A-53-
In the multicolor printing press described in Publication No. 8204, only an inking device and a dampening device are arranged around each plate cylinder, and there is no space for a plate feeding/discharging device, so plate feeding/discharging work is difficult. After removing the inking device and dampening water device from the plate cylinder,
It had to be configured so that the plate was wound around the plate cylinder by hand. As described above, conventional multicolor printing machines have had the problem of not being able to automate the feeding and discharging of plates.

In addition, Japanese Patent Publication No. 57-32956 discloses a printing press that is equipped with an inking device and a plate supply/discharge device as well as a dampening water device, but due to lack of space, the printing press It was equipped with only one, making it extremely unsuitable for multicolor printing.

(Object of the Invention) Therefore, the first object of the present invention is to provide a multicolor printing machine that can automate the feeding and discharging of plates.

A second object of the present invention is to provide a multicolor printing press that allows printing to be changed quickly and easily and is suitable for printing in small quantities.

(Means for Achieving the Object) In order to achieve the above object, the multicolor printing press of the present invention wraps the plate supplied from the plate supply/discharge device around the plate cylinder, and applies the inking device to the wrapped plate. In a multi-color printing machine that performs printing by transferring ink onto a blanket cylinder, a plurality of plate cylinders are arranged in tandem with respect to one blanket cylinder, and the inking device and plate feeding/discharging device are connected to each other. The unit is common to the plate cylinder and is removable from the same working surface of the printing press, and the plate uses a planographic plate that does not require water, and the inking device includes an ink forming roller and an ink scraping mechanism that is pressed against the outer peripheral surface of the roller to form an ink reservoir space between the ink forming roller and the ink forming roller and forming a uniform ink film from the ink supplied to the ink forming roller outer circumferential surface; It is characterized by

(Example) A multicolor printing press according to the present invention will be explained by taking the following printing press 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 attached to and taken off from 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 in a column, respectively. At the rear of these plate cylinders 3, 4, there are plate feeding/discharging units 5, 6 that enable automatic plate feeding/discharging to the corresponding plate cylinders 3, 4, and waterless plates wrapped around the corresponding plate cylinders 3, 4. Inking units 7 and 8 for applying ink to the planographic plate are each removably attached, and plate supply/discharge trays 9 and 10 are detachably attached to each plate supply/discharge unit 5, 6.

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
It is configured such that printing is performed on the continuous paper 12 by controlling the paper feed so as to advance intermittently. Further, at the front position of the printing press main body 1, a swing guide 15 for accommodating the printed continuous paper 12 in an alternately folded manner is mounted on 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 the suction conveyor 14 are driven by the main motor 20 via, for example, a belt. The cylinder 11 is mechanically interlocked with gears disposed so as to mesh with each other at one end of each cylinder, thereby 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 and supply/discharge of plates 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 70
1,702a has a notch 701 cut diagonally downward and forward in order to engage an inking unit take-off cylinder drive lever (described later).
d and 702d (d and e in the same figure), and the lower rear ends of the side plates 701a and 702a are finished into arcuate portions 701e and 702e corresponding to the outer diameter of the plate cylinder 3. A handle 705 and unit mounting screws 706a, 7 are provided on the front side of the locking pieces 701c, 702c.
06b are respectively attached, and a connector 7 is attached to the back side of the locking piece 702c via a mounting bracket 707.
08 is installed. Further, a pulse motor 709 for controlling both pushing of the doctor blade is attached to the outer surface of the side plate 702a, and this pulse motor 709
is connected to the connector 70 via a cord (not shown).
Connected to 8.

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.

As will be described later, the tip of the doctor blade 711 is pressed against the outer circumferential surface of the inking roller 710 by the rotation of the eccentric roller 715, and the space 7 of the ink reservoir between the doctor blade 711 and the inking roller 710 is
47 and an ink forming roller 710
As the ink forming roller 710 rotates, the tip of the doctor blade 711 scrapes off the ink on the surface of the ink forming roller 710, forming an ink scraping mechanism that makes the thickness of the ink film uniform.

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 pressed 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. Then, 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,
This reversal prevention mechanism 718, during printing,
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. , respectively link 740,
It is connected to an actuation lever 742 via 741. This operating lever 742 is rotatably attached to the side plates 701a and 702a with a fulcrum pin 743 as a fulcrum, and its upper end is connected to the rail piece 701.
slit 744 (third
Rail pieces 701b and 702 pass through b from below.
b protrudes above, and a spring locking recess 742a is formed at the upper end of the protrusion.

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 periphery of the kneading roller 711 connects with the periphery 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.
Twelve circumferential barrels are pressed against the circumferential barrel 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-described 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 the 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 supporting metal fittings 748 are attached to the connecting shaft 704 extending between 2a at a predetermined distance in the left-right direction, and a pair of eccentric rollers 715 are held on these supporting metal fittings 748 at a predetermined distance in the left-right direction. be done.

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 shown in FIG.
is pushed back to the right. Therefore, by controlling the amount of rotation of the rotary drive shaft 750 using the pulse motor 709, it is possible to adjust the amount of pushing of the doctor blade 714 into the ink forming roller 710. The device is configured to control the amount by which the doctor blade 714 is pushed.

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 pushing 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
Returns 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-axial distance regulating bearing 719 is disposed above the bearing holding recess 305a of the inter-axial distance regulating member 305, facing each other.

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 (a) Inking unit detachment cylinder operation The inking unit 7 installed in the printing press main body 1 removes the ink form roller 710 from the plate cylinder 3 during plate loading/unloading, blanket cylinder cleaning, etc. It is necessary to separate the ink form roller 710 from the plate cylinder 3, and conversely, it is necessary to attach the ink form roller 710 to the plate cylinder 3 during printing.

Such an operation of the inking unit 7 is carried out through the notches 701d and 7 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
energize. As a result, the link 121 rotates counterclockwise in FIG. 10, the lever 118 similarly rotates counterclockwise 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-axial distance regulating bearing 719 is locked in the bearing holding recess 305a of the inter-axial 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.

(b) 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. With this constant 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 rearwardly, 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. Note that ink that has not been transferred to the mixing roller 712 is collected in the ink reservoir space 747 and reused for the next printing.

(C) Operation for controlling the amount of pushing of the doctor blade 714 Next, the operation for controlling the amount of pushing 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 pushing operation has been explained above, but in the above embodiment, the pushing operation is controlled by the microprocessor 21 (FIG. 2) so that the pushing operation is performed within the range from b to d in FIG. . 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. 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" or not. now,
Assuming that the eccentric roller 715 is in the rotational position within the range shown in FIGS. 13a and 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). Thereafter, the process returns to step S1 again, and the operating state of the limit switch 755 for detecting the origin is determined again, and the rotational position of the eccentric roller 715 is changed to the origin position (FIG. 13b) until the limit switch 755 is turned off. ), the above operation is repeated until it exceeds.

In this way, if the rotational position of the eccentric roller 715 exceeds the original position, or if the rotational position of the eccentric roller has exceeded the original position from the beginning, the process advances to step S3, where the pulse motor 709 is pulled back by one pulse. (clockwise direction in FIG. 13). 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. If it is still "off," the process returns to step S3 and the origin detection limit switch 75 is turned on.
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 can press 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 proceeds 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 "pullback key" is pressed, it is determined in step S10 whether or not the origin detection limit switch 755 is "on".
In this case, that is, when the rotational position of the eccentric roller 715 is at the origin position or beyond the origin position (states shown in FIGS. 13b to 13a), there is a cost to prohibit further pullback, so the process proceeds to step S11. Sound the buzzer to end the work. On the other hand, step S1
0, the origin detection limit switch 755
If it is "off", the process advances to step S12, and the pulse motor 709 performs a pullback operation by one pulse. Next, the process proceeds to step S13, where it is determined whether or not the pullback operation for 45 pulses (equivalent to a pullback amount of 0.05 mm) has been performed.If the pullback operation for 45 pulses has not been performed, the process returns to step S10. Return to , and repeat the above operation until the pullback operation for 45 pulses has been performed. In this way, when the doctor blade 714 is pulled back by 0.05 mm after performing the pull-back operation for 45 pulses, the work is completed. In this pull-back operation, the doctor blade 714 is pulled back by 0.05 mm with one key operation, so in order to obtain the desired pull-back amount, it is only necessary to perform the key operation the corresponding number of times. Here, the amount of blade that can be moved with one key operation is 0.05mm.
(equivalent to 45 pulses), but it is of course possible to change this value.

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, the rotation angle near the rotation angle where printing density control is performed is It is possible to finely adjust the amount of push in response to changes in the 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.

Next, the configuration, operation, etc. related to feeding and discharging plates will be explained.

B. Plate supply/discharge relation (1) Configuration and installation of plate supply/discharge unit (a) Configuration of plate supply/discharge unit Figure 18 shows the plate supply/discharge unit 5. In the figure, figure a is a front view of the plate supply/discharge unit 5, figure b is a plan view, figure c is a sectional view, figure d is a right side view, and figure e is a left side view.

This supply/discharge plate unit 5 has a handle 502 and unit mounting screws 503 attached to both sides of the front side of a unit frame 501 having a frame shape. Left side plate 501a and right partition plate 5 of unit frame 501
At the front of the inner surface of 01b, there is a plate supply/discharge tray 9 (first
A locking pin 504 and a positioning pin 505 are protrudingly provided for attaching the holder (FIG.). Furthermore, a unit mounting rail 506 is attached to the lower part of the outer surface of the left side plate 501a and right side plate 501c of the unit frame 501. Further, a connector 508 is attached to the outer surface of the right side plate 501c via a mounting bracket 507, and a pulse motor 50 for plate feeding start is attached.
9 is attached, and these pulse motors 509 and connectors 508 are electrically connected via a cord (not shown).

Between the left side plate 501a and the right partition plate 501b of the unit frame 501, there is a plate feeding drive roller 510.
Then, a plate discharge drive roller 511 is rotatably attached. The plate feeding drive roller 510 has its roller shaft 5
The right end of 10a is connected to the above-mentioned pulse motor 509 via a shaft coupling (not shown), and at the start of plate feeding, the pulse motor 509 moves the
Rotationally driven in the counterclockwise direction. The plate discharge drive roller 511 has a roller shaft 511a whose right end extends between the right partition plate 501b and the right side plate 501c.
A gear 512 (FIG. 18 d) is attached to the extension, and this gear 512 also connects to the right partition plate 501.
b and the other gear 513 arranged between the right side plate 501c
It is connected to a drive gear 514 via. This drive gear 514 is connected to the plate cylinder gear 301 (FIG. 24) when the plate supply/discharge unit 5 is mounted on the printing press main body 1.
This engages the plate cylinder 3 during plate feeding and discharging.
18c, the plate discharge drive roller 511 is rotated in the counterclockwise direction in FIG. 18c.

The above-mentioned supply/discharge drive roller 510 and plate discharge drive roller 5
In the middle area of No. 11, a support metal fitting 515 is stretched between the left side plate 501a and the right partition plate 501b, a plate feeding start plate 516 is attached to the upper surface side of this support metal fitting 515, and a plate discharge guide 517 is attached to the lower surface side. Installed. Plate feeding start board 5
16, a roller exit/exit opening 516a is formed at a position corresponding to the plate feeding drive roller 510.

At the front position of the plate feeding start plate 516,
The drive shaft 5 is connected between the left side plate 501a and the right partition plate 501b.
18 is rotatably spanned, and this drive shaft 518
Support arms 519 are attached to both ends of the support arms 519, and a plate feeding auxiliary drive roller 520 is rotatably attached between the tips of these support arms 519. An operating lever 521 is attached to the left end of the drive shaft 518, as shown in FIG. 18e.
1, the support arm 519 is rotated in the forward and reverse directions around the drive shaft 518, so that the plate feeding auxiliary drive roller 520 can be driven to and from the plate feeding drive roller 510 through the roller exit/extrusion opening 516a. configured. This operating lever 521 is biased to rotate in the counterclockwise direction by a spring 522 shown in FIG. , 520 are at a distance,
The actuation lever 521 is configured to be locked to a stopper pin 523 protruding from the outer surface of the left side plate 501a to restrict rotation. This actuating lever 521 is driven in conjunction with the ON operation of a solenoid (described later) provided on the printing press main body 1 side, and brings the plate feeding auxiliary drive roller 520 into contact with the plate feeding drive roller 510. roller 510,
520, it is possible to nip the plate and start plate feeding. The plate feeding auxiliary drive roller 520 has a gear (not shown) attached to the left end of the roller shaft 520a.
is engaged with a gear (not shown) attached to the left end of the plate feeding drive roller shaft 510a, so that the plate feeding drive roller 510 is in the first position during plate feeding.
When the plate feeding auxiliary drive roller 520 is driven to rotate in the counterclockwise direction in FIG. The plate is configured so that the plate can be sent out to the plate cylinder side (to the right in Fig. 18c).

At the upper part of the rear end of the unit frame 501, a rotating shaft 524 is rotatably attached between the left side plate 501a and the right partition plate 501b, and a roller support arm 526 holding a plate feeding press roller 525 is attached.
It is rotatably attached to the rotating shaft 524. The roller support arm 526 is biased to rotate in the clockwise direction (i.e., in the plate pressing direction) in FIG. 18c by a torsion coil spring 527 (FIG. 18b) attached to the rotating shaft 524, and is rotated at an appropriate position as shown in the figure. Rotation in the clockwise direction is restricted by a stopper mechanism omitting the .

As shown in FIG. 19, a locking mechanism 528 is provided at the right end of the rotating shaft 524 for locking the plate feed press roller 525 at the plate press position. This lock mechanism 528 has an engaging groove 529a on the outer periphery.
A ratchet wheel 529 having a
A plate feed presser operating arm 531 holding a plate is also fixed to the rotating shaft 524. The plate feeding presser operating arm 531 is configured to be rotatable within the range shown by the imaginary line and the solid line in FIG.
9a), the plate feed press roller 525 is configured to be rotated clockwise in the clockwise direction in FIG. 19b, and the plate feeding press roller 525 is separated from the plate cylinder 3 via the shaft 524 at the clockwise rotation position. On the other hand, a lock release roller 53 is provided at the tip.
The lock release arm 533 and the ratchet 534, to which the lock release arm 533 and the ratchet 534 are integrally connected, are rotatably attached to a shaft 535 provided on the right partition plate 501b, and are rotated counterclockwise in FIG. 19b by a spring 536. The distal end of the ratchet 534 is rotated in the direction shown in FIG.
b to the valley portion 529a and are slidably pressed against each other.

This locking mechanism 528 is operated by a plate feeding presser roller cam 356 (see FIG. 33; details will be described later) provided on the plate cylinder 3 side.
0 is pushed in the counterclockwise direction in Figure 19b,
The rotating shaft 524 similarly rotates counterclockwise, and the plate feeding press roller 525 is set at the plate holding position. At the same time, the ratchet wheel 529 also rotates counterclockwise, and with this rotation, the tip of the ratchet 534 moves from the outer circumference 529b of the ratchet wheel 529 to the trough 529a. The ratchet wheel 529 is locked by the spring 53.
The urging force No. 2 prevents the rotation from returning to the clockwise direction, and holds the plate feeding press roller 525 at the plate press position. This lock is released by kicking up the lock release roller 537 using the lock release cam 306 provided on the plate cylinder 3 side. When the lock release roller 537 is kicked up, the lock release arm 533 rotates clockwise in FIG. The ratchet wheel 529 is detached from the portion 529a, and due to the biasing force of the spring 532, the rotation shaft 524 and the plate feeding presser operating arm 5 are moved.
31 in the clockwise direction in FIG.

Returning to FIG. 18 again, unit frame 50
1, a rotating shaft 538 is rotatably attached between the left side plate 501a and the right partition plate 501b, and a support arm 540 holding a plate discharge pressing roller 539 is fixed to the rotating shaft 538. This rotating shaft 538 is biased by a spring (not shown) in the clockwise direction in FIG. Further, an operating lever 541 is attached to the right end of the rotating shaft 538, as shown in FIG. A stopper pin 542 for regulating is provided to protrude from the outer surface of the right side plate 501c. This operating lever 541 is a solenoid (described later) provided on the printing press main body 1 side.
is rotated in the counterclockwise direction in FIG. 18d in conjunction with the ON operation of
Set it in the position where it is pressed to the side.

Further, as shown in FIG. 18c, the support arm 5
A plate presence detection sensor 544, which is a reflective photoelectric sensor, is attached above the plate 19 to confirm the set state of the plate.

(b) Configuration of the side where the supply/discharge plate unit is attached Next, the configuration of the side where the supply/discharge plate unit 5 is attached will be explained. FIG. 20a shows a rear view of the printing press main body 1, and FIG. 20b shows an inner side view of the left side plate 101 shown in FIG. 20a.

As shown in the figure, a pair of left and right rail receiving members 1
26 are fixed to the inner surfaces of the left side plate 101 and the right side plate 102. The rail receiving member 126 has a rail fitting groove 127 extending horizontally from the back side of the printing press body 1 toward the inside of the printing press body 1 on the opposing inner side surface, and has a screw hole 128 formed on the front side.

At a position above the front end of the right rail receiving member 126, the connector 129 is attached to the right side plate 102 via a mounting bracket 130. This connector 12
9 is connected to the microprocessor 21 via the control section 23 shown in FIG.

At a position above the rear end of the right rail receiving member 126, a drive lever 131 is disposed for operating the plate discharge pressing roller 539 of the plate supply/discharge unit 5 (FIG. 18) to attach to and detach from the plate cylinder 3. This drive lever 131
is the operating lever 5 of the supply/discharge plate unit 5 at its tip.
41 (FIG. 18d), and is fixed to a drive shaft 133 rotatably attached to the right side plate 102. This drive shaft 13
The right end of 3 extends outward of the right side plate 102, and as shown in FIG. 22 (for convenience of explanation, illustration of the right side plate 102 is omitted),
A lever 134 is attached. A spring 135 for urging the lever 134 to rotate counterclockwise in FIG. 22 is stretched between one end of the lever 134 and a right side plate (not shown), and rotates the lever 134 clockwise A solenoid 137 for driving is attached to the right side plate (not shown), and the solenoid 137 and the lever 134 are connected by a spring 138. This solenoid 1
37 is energized, the lever 134 moves to the second position.
The lever 131 is rotated clockwise in FIG. 2, and the lever 131 is also rotated clockwise to set the operating lever 541 of the plate supply/discharge unit 5 to the operating position. Next, solenoid 1
37 is de-energized, the lever 134 rotates counterclockwise due to the biasing force of the spring 135 and returns to its original position. Along with this, the drive lever 131 also rotates counterclockwise to move the plate supply/discharge unit. The operating lever 541 of No. 5 returns to the position where it is released.

On the other hand, at the upper position of the left rail receiving member 126 (FIG. 20), a drive lever 140 for operating the plate feeding auxiliary drive roller 520 (FIG. 18) of the plate feeding/discharging unit 5 to and from the plate feeding drive roller 510 is located.
will be arranged. This drive lever 140 has an engagement pin 141 at its tip that engages with the actuation lever 521 of the plate feeding plate unit 5, and is fixed to a drive shaft 142 rotatably attached to the left side plate 101. The left end of this drive shaft 142 extends outward from the left side plate 101, and a lever 143 is attached to the left end as shown in FIG. 21 (for convenience of explanation, illustration of the left side plate 101 is omitted). Installed. A spring 144 for rotating this lever 143 in the clockwise direction in FIG.
A solenoid 146 is attached to the left side plate (not shown) and spans between one end of the left side plate (not shown) and rotates the lever 143 counterclockwise.
46 and the lever 143 are connected by a spring 148. Further, a stopper pin 149 for restricting the counterclockwise rotation of the lever 143 is provided to protrude from the left side plate (not shown). When this solenoid 146 is energized, the lever 143 is driven to rotate counterclockwise in FIG. 21, and accordingly, the drive lever 140 is also driven to rotate counterclockwise.
The operating position of the operating lever 521 of the plate feeding plate unit 5 is set. Then, when the solenoid 146 is de-energized, the lever 143 rotates clockwise due to the biasing force of the spring 144 and returns to its original position, and accordingly, the drive lever 140 also rotates clockwise. Operating lever 521 of plate feeding plate unit 5
return to the position where it is deactivated.

(c) Attaching the plate supply/discharge unit Next, the procedure for attaching the plate supply/discharge unit 5 to the printing press main body 1 will be explained. This mounting is performed in a state where neither of the solenoids 137 and 146 is energized.

The mounting procedure is to lift the supply/discharge unit 5 by holding the handle 502 with both hands, and as shown in FIG.
The rail 506 is fitted into the rail fitting groove 127 of the rail receiving member 126, and the feeding and discharging plate unit 5 is pushed inward. When the supply/discharge plate unit 5 is pushed all the way, the unit mounting screw 503 is inserted into the rail receiving member 12.
Tighten and fix it in the screw hole 128 of No. 6 to complete the unit installation work.

In this way, when the supply/discharge plate unit 5 is installed,
The connector 508 (FIG. 18) on the unit side is connected to the connector 129 (FIG. 20) on the printing press main body 1 side, and the pulse motor 509 of the plate supply/discharge unit 5 is connected.
and a plate presence detection sensor 544 (FIG. 18),
It is electrically connected to the microprocessor 21 (FIG. 2).

Further, as shown in FIG. 22, the tip of the operating lever 541 of the plate supply/discharge unit 5 is connected to the engagement pin 131 of the drive lever 131 provided on the printing press main body 1 side.
engage with. Therefore, if the solenoid 137 is energized in this state, the drive lever 131 rotates clockwise about the drive shaft 133, and accordingly, the operating lever 541 is rotated counterclockwise about the rotation shaft 538, The discharge plate holding roller 539 is set at the plate holding position. Further, when the energization to the solenoid 137 is released, the discharge presser roller 539 returns to its original position separated from the plate cylinder 3 by an operation opposite to that described above.

Furthermore, by installing the unit, as shown in FIG.
40 engaging pins 141. Therefore,
If the solenoid 146 is energized in this state, the drive lever 140 will rotate to the left about the drive shaft 142,
Accordingly, the actuating lever 521 is rotated clockwise about the drive shaft 518, and the plate feeding auxiliary drive roller 520 of the plate feeding/discharging unit 5 is set in a position where it comes into pressure contact with the plate feeding drive roller 510. Furthermore, when the solenoid 146 is de-energized, the plate feeding auxiliary drive roller 520 returns to its original position separated from the plate feeding drive roller 510 by an operation opposite to the above.

Removal of the plate supply/discharge unit 5 can be performed by following the procedure reverse to the procedure for mounting.

The plate supply/discharge unit 6 has the same structure as the plate supply/discharge unit 5, and its attachment/detachment work is performed in the same manner as the plate supply/discharge unit 5.

(2) Configuration and installation of the plate supply/discharge tray Figure 23a shows a plan view of the plate supply/discharge tray 9.
Figure b shows its side view. This tray 9
is provided with a plate feeding table 901 at the top thereof for sending out a plate for plate feeding, and a plate discharging table 902 for accommodating the plate being discharged at the bottom thereof. A plate bottom positioning member 903 for positioning the plate bottom end of the plate is attached to the rear position of the top surface of the plate feeding table 901, and side plates for positioning both sides of the plate are attached to both sides of the top surface of the plate feeding table 901. A part positioning member 904 is attached. In addition, tray attachment hooks 905 are formed on both sides of the front end of the plate supply/discharge tray 9.

The installation of the plate supply/discharge tray 9 is carried out as shown in FIG.
is inserted into the plate supply/discharge unit 5, hook portions 905 are hooked on the locking pins 504, and both front ends 906 of the tray 9 are locked on the positioning pins 505. To remove the tray 9, follow the above procedure in reverse.

The plate feeding and discharging tray 10 (FIG. 1) has the same structure as the plate feeding and discharging tray 9, and the operation of attaching and removing it to the plate feeding and discharging unit 6 is performed in the same manner as the plate feeding and discharging tray 9.

(3) Plate cylinder and mechanism on the printing press main body side FIG. 24 shows a view of the plate cylinder 3 viewed from the back side of the printing press main body 1. As shown in the figure, the plate cylinder 3
has a plate cylinder gear 301 fixed to its right end, and the plate cylinder 3 and plate cylinder gear 301 are rotatably held on a plate cylinder support shaft 302. The plate cylinder support shaft 302 is provided at both ends with eccentric shafts 303 having a rotation center 303a eccentric to the axis 302a of the plate cylinder support shaft 302. , 102 so as to be rotatable. This rotational drive of the plate cylinder 3 moves the plate cylinder gear 301 to the blanket cylinder 2 (first
This is done by meshing with the blanket body gear (not shown) provided at the right end of the
The plate cylinder 3 is moved to and from the blanket cylinder 2 by driving the eccentric shaft 303 to rotate forward and backward within a certain angle using, for example, a pulse motor.

This plate cylinder 3 is provided with an opening 307 in a part of its outer periphery over the entire width along the axial direction. Furthermore, a plate head gripping mechanism 308 and a plate tail gripping mechanism 309 are disposed at one end and the other end in the circumferential direction of the opening 307, respectively.

Hereinafter, the configurations of the plate cylinder side and the printing press main body side will be explained in order by dividing into each part.

Print head gripping mechanism The printing head gripping mechanism 308 is shown in FIGS. 24a and 25.
As shown in FIG. b and FIG. 26b, a pawl shaft 311 is rotatably spanned between the left and right sides 310, 310 of the plate cylinder 3, and the pawl shaft 311 is mounted on the outer circumference of the pawl shaft 311 at equal pitches along the axial direction. A plurality of plate head gripping claws 312 are fixed. Links 313 are fixed near both ends of the pawl shaft 311, and a tension spring 326 is suspended between the tip of the link 313 and a spring receiving pin 314 fixed in the plate cylinder 3.
12 is urged to rotate around the claw shaft 311 in the clockwise direction in FIG. 25b, that is, in the claw closing direction. The opening operation of the plate head gripping pawl 312 is performed by a plate head gripping pawl operating mechanism (described later) provided on the left end side of the plate cylinder 3.

On the other hand, a plate head positioning pin 315 is provided at the opening edge of the plate cylinder 3 at a position opposite to the plate head gripping claw 312.
is installed protrudingly. Then, the above-mentioned plate head gripping mechanism 30
The plate head gripping by 8 is performed by closing the plate head gripping claw 312 so that the plate head positioning pin 315 engages with a pin hole provided in the plate head of the plate (not shown).

Plate Bottom Grasping Mechanism The plate bottom gripping mechanism 309, as shown in FIG. 24a and FIG.
A hook shaft 316 is rotatably spanned between 0 and 310, and a plurality of plate bottom hooks 317 are fixed to the hook shaft 316 at equal pitches along the axial direction. A torsion coil spring 318 is externally mounted near the right end of the hook shaft 316, and the plate bottom hook 317 rotates counterclockwise in FIG. 40 with the hook shaft 316 as a fulcrum.
In other words, it is rotationally biased in the direction in which the plate bottom is pulled. A link 319 is fixed to the right end of the hook shaft 316 on the outside of the plate cylinder gear 301, and this link 319 is rotated in both forward and reverse directions by a plate bottom hook operating mechanism, which will be described later. The operation of grabbing the plate tail and releasing the plate tail at 317 is performed.

Plate supply/discharge cam mechanism The left side plate 101 of the printing press main body 1 is shown in FIGS. 25 and 26 (for ease of understanding, illustration of the left side plate 101 is omitted. The same applies to the following drawings. ) is provided with the supply/discharge plate cam mechanism shown in FIG.
This plate supply/discharge cam mechanism is constructed as follows. That is, the solenoid 150 is connected to the left side plate 10.
1, and a shaft 151 is rotatably attached to pass through the left side plate 101, and a link 152 and a set lever 153 are fixed to the outer and inner ends of the shaft 151, respectively. Further, a set roller 154 is attached to the tip of the set lever 153. Furthermore, link 1
A spring 155 is stretched between the set lever 152 and the solenoid 150, and a return spring 156 is stretched between the set lever 153 and the left side plate 101 for urging the set lever 153 to rotate clockwise. On the other hand, a supply/discharge plate cam 157 is rotatably attached via a shaft 158 protruding from the inner surface of the left side plate 101, and a lock lever 159 is also attached to the left side plate 101.
A tension spring 161 is tensioned between the supply/discharge plate cam 157 and the lock lever 159 to prevent rotation of the lock lever 159 in the counterclockwise direction. , is regulated by being engaged with a lock pin 157a provided at the tip of the supply/discharge plate cam 157.

The operation of the plate supply/discharge cam mechanism is as follows. That is, when the solenoid 150 is turned on,
The link 152 rotates counterclockwise in FIG. 25 via the spring 155, and the set lever 1 is rotated accordingly.
53 resists the biasing force of the return spring 156, and the shaft 15
Rotate counterclockwise using 1 as a fulcrum. Due to this rotation, the supply/discharge plate cam 157 is moved to the set roller 15.
When the plate feeding/discharging cam 157 rotates by a predetermined angle, the lock pin 157a falls into the groove 159a of the locking lever 159, and the plate feeding/discharging cam 157 moves to its rotational position. (i.e.,
(locked). After the supply/discharge plate cam 157 is locked, when the solenoid 150 is turned off, the spring 1
55 is released, the link 152 and the set lever 153 are rotated clockwise about the shaft 151 by the biasing force of the return spring 156, and return to their original positions. In this case, the feeding/discharging plate cam 157 remains held at the lock position. As shown in FIG. 31, this plate supply/discharge cam 157 is unlocked by a roller 320 provided on the plate cylinder 3 side as the plate cylinder 3 rotates counterclockwise.
This is done by kicking up the tip of 9. That is, when the lock lever 159 is lifted up, the lock pin 157a provided on the supply/discharge plate cam 157 moves into the groove 159a of the lock lever 159.
The supply/discharge plate cam 157 is rotated clockwise by the tensile force of the tension spring 161 and returned to the original position shown in FIG. In this way, the lock of the supply/discharge plate cam 157 is released.

Plate head gripping claw operating mechanism A plate head gripping claw operating mechanism is provided on the outer surface side of the left side portion 310 of the plate cylinder 3, as shown in FIGS. 25a and 26a. This operating mechanism is constructed as follows. That is, the left end portion of the pawl shaft 311 shown in FIG. 25b is extended to the outside of the left side portion 310 of the plate cylinder 3 shown in FIG. 25a, and the link 321 is connected to the extended portion. Further, another link 322 is rotatably attached to a shaft 323 provided on the left side 310 of the plate cylinder 3. This link 322 has rollers 320 and 324 attached to its intermediate position and tip position, respectively. Also,
Tension spring 325 between link 322 and left side 310
is stretched, and the link 322 is urged to rotate counterclockwise about the shaft 323, and its rotation is regulated by locking the roller 324 at the link 321 position.

The operation of this plate head gripping claw operating mechanism is as follows. That is, first, the plate feed/discharge cam 157 is locked as shown in FIG. 25a, and then the lock of the plate head gripping vise mechanism, which will be described later, is released, and then the left side of the plate cylinder 3 is opened as shown in FIG. 26a. As the link 322 rotates, the roller 320 of the link 322 rides on the cam surface 157b of the plate supply/discharge cam 157 and rolls on the cam surface 157b. This causes the link 322 to move to the shaft 323.
The other link 321 is pushed to the left by the roller 324 provided at the tip of the link 322 (the 30th
(see Fig. 30c), and the pawl shaft 311 rotates to the left (see Fig. 30c). In this way, the claw shaft 311 rotates to the left by overcoming the tension spring 326 shown in FIG.
12 is similarly rotated to the left, and the plate head gripping claw 312 performs an "open" action. As the plate cylinder 3 further rotates, the roller 32 of the link 322 is rotated as shown in FIG.
0 reaches the recess 157c of the supply/discharge plate cam 157,
The roller 320 falls into the recess 157c, and the pressing by the plate supply/discharge cam 157 is released. In this way, the links 322 and 321 released from the regulation of the supply/discharge plate cam 157 are moved to the shaft 323 and the claw shaft 31, respectively.
1, the pawl shaft 311 rotates clockwise due to the tensile force of the tension spring 326 (Fig. 26), and the plate head gripping pawl 312 (Fig. 25)
Figure b) performs a "close" operation. When the plate cylinder 3 further rotates, the roller 320 kicks up the lock lever 159 and the plate supply/discharge cam 15 is rotated.
7 is unlocked.

Plate Head Holding Vise Mechanism and Vise Release Mechanism On the outer surface side of the left side 310 of the plate cylinder 3, there are shown in FIG. 25a, FIG. 26a, FIG.
As shown in FIG. 2, in addition to the above-mentioned plate head gripping claw operating mechanism, a plate head gripping vise mechanism and a vise release mechanism are provided. Among these, the plate head gripping vise mechanism is constructed as follows. That is, as shown in FIG. 31, a link 327 is rotatably attached to the left side 310 of the plate cylinder 3 via a shaft 328, and the roller 3 is mounted at the center and tip of the link 327.
29 and 330 are installed respectively. Further, another link 331 is connected to the left side portion 310 via the shaft 332.
The roller 330 of the link 327 is slidably engaged with an elongated hole 331a formed in the link 331. Furthermore, another link 334 is rotatably connected to the tip of the link 331 via a pin 333, and the other end of this link 334 and the tip of the link 321 are rotatably connected via another pin 335. Plate cylinder 3
A stopper 336 for restricting the clockwise rotation of the link 331 is protrudingly provided on the left side 310 of the link 331 at an inward position of the link 331. Also,
A tension spring 337 is tensioned between the left side portion 310 and the link 327 to relieve the centrifugal force acting on the link 327 as the plate cylinder 3 rotates. Furthermore, a link 32 is provided at a predetermined position on the printing press main body 1 side.
A plate head gripper lock cam 162 for pushing the roller 329 of No. 7 inward into the plate cylinder 3 is fixedly provided.

The operation of this plate head gripping claw vise mechanism is as follows. That is, as shown in FIG. 31, immediately after the roller 320 of the link 322 fits into the recess 157c of the plate supply/discharge cam 157, the plate head gripping claw 312 closes and the plate head grip is performed. The roller 329 of the link 327 is pressed against the plate head gripper lock cam 162, and the link 327 rotates clockwise about the shaft 328 as a fulcrum.
When the link 327 rotates clockwise, the roller 330 of the link 327 slides within the elongated hole 331a of the link 331, causing the link 331 to rotate clockwise about the shaft 332. In this way, when the pin 333 moves from the position shown in FIG. 31 to the straight line connecting the pin 335 and the shaft 332, the pawl shaft 311 is strongly rotated clockwise via the link 321 with that position as the top dead center, and the block head is rotated forcefully to the right. A strong pressing force is applied to the gripping claws 312. Further, the link 331 rotates clockwise, and the 32nd
As shown in the figure, when the pin 333 moves to a position slightly beyond the above-mentioned top dead center, the link 331 is engaged with the stopper 336 and becomes self-locked. Pressing force is continuously applied.

On the other hand, the vise release mechanism for releasing the lock of the plate head gripping claw vise mechanism is constructed as follows. That is, as shown in FIGS. 25a and 26a, the approximate center of the link 338 is connected to the shaft 339.
(The roller 32 attached to the tip of the link 322
The link 338 is rotatably connected to the tip of the link 322 via a shaft (which also serves as the rotation shaft of No. 4), and rollers 341 and 342 are attached to one end and the other end of the link 338.

The action of this vise release mechanism is as follows. In other words, with the vise mechanism locked,
When the plate cylinder 3 rotates to the position shown in FIG.
As shown in Figure a, the roller 341 of the link 338 runs over. This causes the link 338 to
9 as a fulcrum, and a roller 342 attached to the end of the link 338 presses the link 334 toward the outer circumference of the plate cylinder. When the link 334 is pressed, the link 334 rotates clockwise about the pin 335, and at the same time, the link 331 rotates counterclockwise about the shaft 332. As a result, the pin 335 and the shaft 33
When the pin 333 passes through the straight line connecting the two (ie, the top dead center), the vice mechanism is unlocked, and the link 321 can rotate to the left about the claw shaft 311.

Plate head extrusion mechanism Inside the plate cylinder 3, there are
As shown in the figure and FIG. 29, a plate head extrusion mechanism is provided. This plate head extrusion mechanism is constructed as follows. That is, the left and right side portions 310 of the plate cylinder 3,
A shaft 342 rotatably spanned between 310,
One end of the link 343 is fixed, and a long hole 344b of the link 344 has a plate extrusion claw 344a at the tip.
Then, a shaft 346 fixed in the plate cylinder 3 is slidably engaged, and the rear end of this link 344 and the tip of the link 343 are rotatably connected by a shaft 345. These links 343, 344 are
A plurality of pins are arranged along the rotation axis direction of the plate cylinder 3 in correspondence with each plate head positioning pin 315, and a link 344 moves back and forth via a link 343 by forward and reverse rotation of the shaft 342, and the plate ejecting claw 344a is configured to move "out" and "in" from the open end surface of the plate cylinder 3. The left end of the shaft 342 is extended to the outside of the left side 310 of the plate cylinder 3, and a link 347 having a gear 347a is fixed to the extended end, and another link 348 has a gear 348a meshing with this gear 347a. is rotatably connected to a shaft 349 protruding from the outer surface of the left side 310 of the plate cylinder 3. A cam follower 350 is attached to the tip of this link 348. Further, a tension spring 351 is stretched between the tip of the link 347 and the left side portion 310, and the shaft 342 is biased to rotate in the counterclockwise direction in FIG. It is urged to rotate like this. On the other hand, a plate discharging cam 163 corresponding to the cam follower 350 is fixed to a shaft 158 that also serves as a rotating shaft of the plate supplying and discharging cam 157,
In conjunction with the operation of the supply/discharge plate cam operation mechanism described above,
It is configured to rotate forward and backward within a predetermined range around an axis 158.

The operation of this plate head extrusion mechanism is as follows.
That is, after the plate discharge cam 163 is locked at the position shown in FIG.
The cam follower 350 rides on a, link 3
48 rotates to the left about axis 349. link 34
8 rotates to the left, as shown in FIG. 28, the link 347
rotates clockwise about shaft 342 against the biasing force of spring 351. Due to this clockwise rotation, the link 343 also rotates clockwise, and the plate ejecting claw 3 of the link 344
44a performs an "out" operation. In this case, Fig. 27b
As shown in FIG.
If the printing head 50a' of 0' is held in advance, the second
As shown in FIG. 8b, the plate head 50a' is pushed out from the plate head positioning pin 315 by the plate pushing claw 344a. Further, the plate cylinder 3 rotates, and as shown in FIG. 29a, the cam follower 350
When the plate discharge cam 163 passes the first cam surface 163a and moves to the second cam surface 163b, the link 348 is moved toward the shaft 34 by the urging force of the tension spring 351.
9, the links 347 and 343 rotate to the left, and the plate ejecting claw 344a moves in.

Plate Feeding Presser Roller Cam Mechanism A plate feeding presser roller cam mechanism is provided on the right side 310 of the plate cylinder 3, as shown in FIG. This plate feeding presser roller cam mechanism is constructed as follows. That is, within the plate cylinder 3, the claw shaft 311
A gear 352 is fixed to a position near the right end of the fulcrum shaft 354, which has a small gear 353 fixed to one end that meshes with the gear 352, is rotatably attached to the right side 310, and is linked to the other end of the fulcrum shaft 354. 3
55 is fixed. On the other hand, the plate feeding presser roller cam 3
56 is rotatably attached to the right side part 310 via a fulcrum pin 357, and this supply/discharge presser roller cam 3
The link 355 is inserted into the elongated hole 356a formed in the
A pin 358 attached to the tip of is slidably engaged.

The operation of this plate feeding presser roller cam mechanism is as follows. That is, when the plate head gripping pawl 312 operates to "open" in the manner described above, the gear 352 fixed to the pawl shaft 311 rotates clockwise in FIG. do,
Link 355 also rotates to the left. link 355
When rotates to the left, a pin 358 provided at the tip of the link 355 slides within the elongated hole 356a of the plate feed presser roller cam 356, causing the plate feed presser roller cam 356 to rotate clockwise about the fulcrum pin 357. As a result, the plate feeding presser roller cam 356 is set at a predetermined position. Similarly, the hanto gripping nail 3
12 performs the "close" operation, the reverse operation to the above is performed, and the plate feeding presser roller cam 356 returns to its original position and is reset.

Attachment/separation operation of the plate feeding press roller The plate feeding press roller 525 provided in the plate supply/discharge unit 5 is attached/separated from the plate cylinder 3 in the following manner. That is, as shown in FIG. 33d, after the plate feed presser roller cam 356 is set, the plate feed presser actuating roller 530 moves the plate feed presser roller cam 35 while the plate head gripper claw 312 is open.
It gets to 6. As a result, as shown in FIG.
4 rotates to the left, the roller support arm 526 similarly rotates to the left, and the plate feeding press roller 525 is set at the plate press position. This setting operation is performed when the plate feeding press roller 525 is located at the opening 307 of the plate cylinder 3. At the same time, as the rotating shaft 524 rotates to the left, the ratchet wheel 529 shown in FIG. The roller 525 is locked in the plate holding position. Next, the plate head gripping claw 312 moves to "close" to grip the plate head, and when the plate feed press roller 525 passes through the opening 307 as the plate cylinder 3 rotates, the plate feed press roller 525 closes the plate cylinder 3. Climb onto the outer periphery of the
In this case, when the plate 50 starts to be pressed against the plate cylinder 3, the roller support arm 526 is urged to rotate counterclockwise with respect to the rotating shaft 524 by the torsion coil spring 527, so that the plate 50 is pushed against the plate feeding presser roller 52.
5, it is elastically pressed against the plate cylinder 3. In this way, as the plate cylinder 3 rotates, the plate 50 is pressed against the plate cylinder 3 by the plate feeding press roller 525 and wound without slack.

On the other hand, as shown in FIG. 35b, a lock release cam 306 is fixed on the outer circumference of the plate cylinder 3 in correspondence with the lock release roller 537. rides on the lock release cam 306. As a result, the ratchet 5 provided integrally with the lock release arm 533
34 rotates clockwise around the shaft 535, and the ratchet 5
The tip of 34 is the valley part 52 of the ratchet foil 529.
It falls outside of 9a. Ratchet 534 is Tanibe 529
Once removed from a, the ratchet foil 529 is attached to the shaft 524 and the arm 5, as shown in FIG. 35a.
Since the arm 5 is urged to rotate in the clockwise direction by the spring 532 via the stopper 543
Rotate clockwise until you hit 31. When the shaft 524 rotates clockwise, the roller support arm 526 also rotates clockwise, and the plate feeding press roller 525 separates from the plate cylinder 3.

Plate Bottom Foot Reset Cam Mechanism A plate bottom foot reset cam mechanism shown in FIG. 36 is provided on the right side plate 102 of the printing press body 1.
This plate bottom reset cam mechanism is located at the right side plate 10.
A link 165 and a plate tail reset cam 166 are respectively fixed to the outer and inner ends of a shaft 164 which is rotatably attached so as to penetrate through the plate 2 (not shown). Also, link 165 and lever 1
34 (explained using FIG. 22) between the springs 167
is tensioned, and another spring 169 is tensioned between the link 165 and a spring stopper 168 fixed to the outer surface of the right side plate 102.

The operation of this plate bottom foot reset cam mechanism is as follows. That is, when the solenoid 137 is turned on, the lever 134 rotates clockwise about the shaft 133. As a result, the link 165 rotates counterclockwise around the shaft 164 via the spring 167, and the plate end foot reset cam 16 fixed to the shaft 164 is rotated to the left.
6 similarly rotates to the left and is prevented from rotating by being engaged with a stopper 170 (protruding from the inner surface of the right side plate 102 of the printing press body 1) (FIG. 37). This "set" state of the plate bottom foot reset cam 166 is maintained while the solenoid 137 is on. When solenoid 137 is turned off, the exact opposite operation is performed. That is, the suction force of the solenoid 137 is released, the lever 134 and the link 165 are rotated in the opposite direction to the above due to the tensile force of the spring 169, and the plate bottom reset cam 1 is rotated.
66 rotates back to its original position ("reset" state).

37 to 40 on the right side 310 of the plate cylinder 3.
A plate bottom hook actuation mechanism as shown in the figure is provided. This plate bottom hook operating mechanism is constructed as follows. That is, as shown in FIGS. 37 and 38,
A link 359 is rotatably attached to the outer surface of the right side 310 of the plate cylinder 3 via a shaft 360. This link 359 has a cam follower 361 on its outer surface.
is attached, a pin 362 is provided protruding from the inner surface as shown in FIG.
The link 359 is urged to rotate clockwise about the shaft 360. Also, the other link 364 is connected to the axis 3
65, it is rotatably attached to the outer surface side of the right side portion 310. At one end of this link 364,
A roller 366 having a roller shaft end that is rotatably engaged with the inner end surface 359a of the link 359 is attached, and a tension spring 367 is tensioned between the other end of the link 364 and the right side 310, so that the link 364 is attached to the shaft 36.
5 as a fulcrum and is urged to rotate clockwise. This link 364 connects the shaft end of the roller 366 to the link 359 in the clockwise rotation position shown in FIG.
By locking the spring 3 in the recess 359b of the
63 and hold the link 359 in a position rotated counterclockwise by a predetermined angle about the shaft 360 (that is, the link 359 is locked).

On the other hand, a plate end footset cam 171 for releasing the locked state of the link 359 is attached to the printing press main body 1 side in correspondence with the link 364. This version butt set cam 171 is the 39th
As shown in the figure, it is rotatably attached to the tip of a cam attachment member 172 protruding from the inner surface of the right side plate 102 of the printing press body 1 via a horizontal shaft 173, and is rotated clockwise by a spring 174. The stopper portion 172 of the cam mounting member 172 is rotated by
Rotation is regulated at a position where the horizontal attitude is maintained by a. This version butt set cam 171 is the third
With the link 359 in the locked state shown in Figure 8, the plate cylinder 3
When it rotates clockwise, it engages with the link 364, causing the link 364 to rotate counterclockwise about the shaft 365, thereby unlocking the link 359. Note that when the plate cylinder 3 is manually reversely rotated during maintenance and inspection, the cam 171 and the link 364 engage with each other. Since the link 364 and the cam 171 are rotated counterclockwise around the horizontal axis 173 to escape, damage to the link 364 and the cam 171 is avoided.

On the other hand, as described above, the hook shaft 316 shown in FIG. 319
is engaged with a pin 362 protruding from the link 359.

The operation of this plate bottom hook operating mechanism is as follows. That is, as shown in FIG. 37, after the plate bottom foot reset cam 166 is "set" by the method described above, the link 359, which is in the unlocked state as shown by the solid line in the figure, is moved to the right side of the plate cylinder 3. When the plate bottom foot reset cam 166 is rotated by rotation, the cam follower 361 of the link 359 rides on the plate bottom foot reset cam 166, and the link 359 resists the tensile force of the spring 363 and moves to the shaft 36.
Rotate counterclockwise around 0 to the position shown by the imaginary line in the figure. When link 359 rotates to the left, link 364
is rotated clockwise by the tensile force of the spring 367 with the shaft 365 as the fulcrum, and the fulcrum shaft end of the roller 366 is the fulcrum of the link 3.
59, and the link 359 is locked in the position shown by the imaginary line in FIG. In this way, when the link 359 rotates to the left by a predetermined angle, the pin 362 protruding from the link 359 moves to the left and engages with this rotation, as shown in FIG. link 319
However, the hook shaft 31 resists the biasing force of the spring 318.
Rotate clockwise using 6 as a fulcrum. As a result, the hook shaft 3
The plate bottom hook 317 fixed to the plate 16 also rotates clockwise together with the hook shaft 316. In this case, the 41st
As shown in the figure and FIG. 42, the plate 5 is mounted on the plate cylinder 3.
0' is attached, clockwise rotation of the plate bottom hook 317 causes the plate bottom hook 317 to come off the plate bottom hole 50b', and the plate bottom grip is released.

Further, when the plate cylinder 3 continues to rotate and reaches the rotational position shown in FIG. 38, the roller 366 of the link 364
hits the plate end footset cam 171, and the link 364 rotates to the left about the shaft 365. As a result, the shaft end of the roller 366 is connected to the recess 3 of the link 359.
59b and due to the biasing force of the spring 363,
Link 359 rotates clockwise about axis 360. When the link 359 rotates clockwise, the engagement between the link 319 and the pin 362 is released, as shown in FIG.
The plate bottom hook 317 receives the urging force of the spring 318 and rotates to the left. This counterclockwise rotation is performed while the plate feeding press roller 525 is in the "applied" operation, as shown by the imaginary line in FIG. 40a. Therefore, when a new plate 50 is fed, the plate bottom hook 317 rotates to the left while the plate bottom 50c is pushed into the opening 307 of the plate cylinder 3 by the plate feeding presser roller 525. As a result, the plate bottom hook 317 hooks into the plate bottom hole 50b, and holds the plate bottom 50c by pulling it in a substantially tangential direction to the outer peripheral surface of the plate cylinder.

Plate Grasping and Plate Misalignment Detection Mechanism As shown in FIG. 24b, a plate bottom gripping and plate misalignment detection mechanism is provided on the right side of the plate cylinder 3. This detection mechanism is configured as follows. That is, the mark member 375 is attached to a link 319 fixed to the right end of the hook shaft 316, while the inter-axis distance regulating member 305 is held on the plate cylinder support shaft 302 so as to maintain a predetermined posture with respect to the printing press body 1. A photoelectric sensor 376 is attached to the center distance regulating member 305 in correspondence with the mark member 375.
is installed. The mark member 375 has a surface facing the photoelectric sensor 376 finished as a light-reflecting surface, and the photoelectric sensor 376 is composed of a light emitting element and a light receiving element, and the mark member 375 faces the photoelectric sensor 376 by rotation of the link 319. When the mark member 375 is positioned, light projected from the light emitting element is reflected by the mark member 375 and guided to the light emitting element.

FIGS. 42 b to 42 d are diagrams showing the plate end gripping state after the plate feeding operation. In the figure, a curve 377 indicated by a two-dot chain line indicates the locus of the detection position detected by the photoelectric sensor 376 (FIG. 24b) as the plate cylinder 3 rotates. Now, as shown in Figures a and b, when the plate edge 50c is normally held by the plate edge hook 317, the mark member 375 is removed from the mark detection position 377, so the photoelectric sensor 3
The mark member 375 is not detected by the mark member 76. On the other hand, as shown in Figure c, if the plate bottom hole 50b is damaged and widens, or if the plate head is held incorrectly, the plate bottom hook 317 will be larger than in the case shown in Figure b. Rotate further to the left, and the bottom of the plate 5
0c, the mark member 375 also rotates counterclockwise around the hook shaft 316 by an amount corresponding to the amount of rotation, and the mark member 375 is located above the mark detection position 377, so that the photoelectric sensor 376
Accordingly, the mark member 375 is detected. In addition, as shown in FIG. d, the plate end hook 31
When the plate bottom 50c is not held due to 7,
The link 319 rotates counterclockwise to a position where it engages with the pin 362, and in this case as well, the mark member 375 is located above the mark detection position 377, so the mark member 375 is detected by the photoelectric sensor 366.

In this way, the plate bottom 50 is moved by the plate bottom hook 317.
If c is held normally, the photoelectric sensor 376
The mark member 375 is not detected by the photoelectric sensor 376, and the mark member 375 is detected by the photoelectric sensor 376 only when a plate misalignment occurs or plate gripping is not performed. , it becomes possible to automatically detect plate wrapping errors such as plate misalignment and plate grip failure.
Note that the output signal of the photoelectric sensor 376 is input to the microprocessor 21 shown in FIG. The system is configured so that the printing press stops immediately upon receiving this command.

Cross-sectional structure of plate cylinder FIG. 44 shows a sectional view of the plate cylinder 3. As shown in the figure, the corner of the plate cylinder 3 between the opening end face and the outer peripheral surface of the plate cylinder is rounded. That is, on the plate head holding side, the plate head pressure contact surface 36
9 is formed as a plane perpendicular to an imaginary line 371 connecting the center of the opening 307 and the plate cylinder center 370, and the corner portion between the plate head pressure contact surface 369 and the plate cylinder outer circumferential surface 372 has a smooth surface with a radius of R ₁ . It is finished with a curved surface. In addition, on the plate bottom gripping side, the opening end surface 373 is formed as a plane perpendicular to the virtual line 371, and the corner portion between the opening end surface 373 and the plate cylinder outer circumferential surface 372 is formed into a smooth curved surface with a radius R ₂ . It is finished. If such a rounded finish is applied, the printing head 50a will become the printing plate gripping claw 312.
After the plate 50 is held in pressure contact with the plate head pressure contact surface 369, as the plate 50 is wrapped around the plate cylinder outer circumferential surface 372 while being pressed by the plate feeding press roller 525 (FIG. 21), the plate 50 is held in pressure contact with the plate head pressure contact surface 369. This means that it can be wrapped tightly without leaving any gaps between the two. Further, even when the plate bottom 50c is held by the plate bottom hook 317 so as to be tensioned and biased inward of the plate cylinder opening, the plate bottom 50c can be fitted to the outer periphery of the plate cylinder and the winding can be completed. In this way, it becomes possible to wrap the plate 50 at a predetermined position on the plate cylinder 3 with high accuracy. In addition, in this example,
As an example of the dimensions of the radii R ₁ and R ₂ above, the radius is 76.5
For the plate cylinder 3 of mm, both R ₁ and R ₂ are set to 15 mm.

(4) Plate manufacturing procedure and its structure Next, before explaining the automatic plate feeding and discharging operation,
The plate 50 used in the above printing machine will be explained. This plate 50 is manufactured by the procedure shown in FIG. 45. That is, as shown in FIG. 1A, first, an original plate 51 in which a photosensitive resin layer is laminated on a polyester film base is cut to a predetermined size using a cutter. Next, as shown in FIG. 24B, a plate head hole 50d is formed at the plate head position of the original plate 51 corresponding to the positioning pin 315 shown in FIG. The plate bottom hole 50b corresponds to the plate bottom hook 317 shown in FIG.
form. In this case, the formation positions of the plate head hole 50d and plate bottom hole 50b are on each side of the original plate 51, that is, both side sides 51a, plate bottom side 51b, and plate head side 51.
c is defined as the standard.

On the other hand, a printing pattern 5 is printed on the original film 52 shown in FIG.
3 and a registration mark 54 are drawn. Further, the original film 52 is
A positioning hole 55 corresponding to the plate head hole 50d is formed at the plate head position. In this case, the center positioning hole 55 is set to a perfect circle with the same dimensions as the plate head hole 50d, and the positioning holes 55 at both ends are set to the original film 52.
It is formed into an elongated hole with its long axis set in the left-right direction in consideration of thermal expansion.

Next, the original film 52 is superimposed on the original plate 51 by passing positioning pins (not shown) through the positioning hole 55 and the plate head hole 50d, and with the plate thus positioned, an exposure process (e in the figure) is performed to form the printed pattern 53. is printed on a predetermined position on the original plate 51. Once the printing is completed, a phenomenon treatment (f in the same figure) is subsequently performed to complete the plate 50 as a final product.

(5) Plate loading/unloading operation Next, the plate loading/unloading operation during plate replacement will be explained. FIG. 46 is a flowchart showing the operation of the microprocessor 21 (FIG. 2) when the operator issues a plate change command by pressing, for example, the plate change key on the operation panel 25 (FIG. 2). It is.

When a plate exchange command is given, it is determined in step S30 whether or not the command can be accepted. If the command cannot be accepted, the operation is terminated, and if the command can be accepted, the process proceeds to the next step S31.

In step S31, the supply/discharge tray 9,
The set state of the plate above 10 is determined. In this case, the plates are specifically set as follows. That is, in FIG. 21, the plate head 50d of the plate 50 to be newly printed (hereinafter referred to as new plate) is slightly inserted between the plate feeding drive roller 510 and the plate feeding auxiliary drive roller 520 (at this point, the plate head 50d is inserted between the plate feeding drive roller 510 and the plate feeding auxiliary drive roller 520). are separated from the rollers 510), both sides of the new plate 50 are positioned along the both side positioning members 904 of the plate supply/discharge tray 9 or 10 shown in FIG. Alternatively, it is positioned along the plate bottom positioning material 903 of No. 10. Also, new edition 50
The determination as to whether or not a plate is set is made using a plate presence detection sensor 544 attached to the plate supply/discharge unit 5 or 6 shown in FIG.

In this way, in step S31, the new edition 50
The setting status of the trays 9 and 10 is determined.
If the new plate 50 is set in both of the printing plates (that is, in the case of two-color printing), it is confirmed in step S32 that the inking units 7 and 8 are both set, and then the process proceeds to step S33 where the printing is performed. For example, the type is set to the state "3" and stored in the memory. In addition, in step S31, the new plate 50 is placed only in the upper tray 9.
is set (that is, in the case of one-color printing), after confirming in step S34 that the upper inking unit 7 is set, the process proceeds to step S35, where the hand type is set to, for example, "1". The state is set and stored in memory. Further, in step S31, if the new plate 50 is set only on the lower plate supply/discharge tray 10 (that is, in the case of one-color printing), it is determined that the lower inking unit 8 is set in step S36. After confirming, the process proceeds to step S37, where the hand type is set to, for example, the state "2" and stored in the memory. Furthermore, in step S31, if the new plate 50 is not set on any of the plate supply/discharge trays 9, 10 (that is, in the case of plate discharge operation), the process proceeds to step S38, where the hand type is set to the "0" state, for example. set and store it in memory. Incidentally, in steps S32, S34, and S36, if the predetermined inking unit 7 or 8 is not installed, the process proceeds to step S39, where an error message is displayed, and then the operation is terminated.

In this way, steps S33, S35, S37,
In S38, when setting of the hand type is completed, the process proceeds to step S40, where mechanical initialization is performed. As a result, the plate cylinders 3, 4 and the impression cylinder 11 are separated from the blanket cylinder 2, and the inking units 7, 8 are set at a position where they are separated from the plate cylinders 3, 4.

Next, in step S40, the low-speed motor is turned on and the high-speed motor is turned off, and the ink forming rollers of the blanket cylinder 2, impression cylinder 11, plate cylinders 3 and 4, and inking units 7 and 8 are set to normal printing conditions. It starts rotating at a slower speed.

Thereafter, in step S42, the state of the hand type stored in the memory is determined. That is, when it is determined that the hand type is "3" (in the case of upper and lower plate feeding), the process advances to step S43, where plate feeding and discharging processing is performed on both plate cylinders 3 and 4. If it is determined that the hand type is "1" (in the case of a top-fed plate), the process advances to step S44, where plate feeding and discharging processing is performed on the plate cylinder 3 side, and the plate cylinder
On the other hand, only the plate discharge process is performed. Similarly, if the hand type is determined to be "2" (in the case of a sub-fed plate), the process proceeds to step S45, where plate feeding and discharging processing is performed on the plate cylinder 4 side, and plate discharging processing is performed on the plate cylinder 3 side. Only processing takes place. In addition, if the hand type is determined to be "0" (in the case of only ejection),
Proceeding to step S46, only plate discharge processing is performed on both plate cylinders 3 and 4. In this case, the only difference between the plate supply and discharge process and the plate discharge process is whether or not the plate supply drive roller 510 and plate supply auxiliary drive roller 520 shown in FIG. 22 are rotationally driven by the pulse motor 509 (FIG. 18d). be. That is, when performing plate feeding and discharging processing, the pulse motor 509 is driven at a predetermined timing and for a predetermined time to feed the plate, and when only plate discharging processing is performed, the pulse motor 50 is driven.
9 is not driven at all (that is, the plate is not fed).

After completing the predetermined plate feeding and discharging processes in steps S43 to S46, the process proceeds to step S47, where the low speed motor is turned off and the high speed motor is turned on, and the blanket cylinder 2, impression cylinder 11, plate cylinders 3 and 4, and ink cylinders are The ink forming rollers of the king units 7 and 8 are switched from low speed rotation to high speed rotation.
In this way, the series of plate exchange processing is completed.

The above is the operation of the microprocessor 21 (Fig. 2) when a plate exchange command is given.Next, the plate supply/discharge operation including each mechanism will be explained using the time chart shown in Fig. 43. explain. However, here, a new plate 50 is set on the plate feeding base 901 of the plate supply/discharge tray 9, and a printed plate 50 is placed on the plate cylinder 3 side.
0' (hereinafter referred to as the old plate) is wound (that is, the plate feeding/discharging operation is performed on the plate cylinder 3 side) as an example. In other cases, the predetermined plate feeding and discharging operations are performed based on the same principle as described above, and therefore the explanation thereof will be omitted.

First, when a plate replacement command is given and the plate cylinder 3 starts rotating, a plate discharge drive roller 511 shown in FIG. 22 connected to the plate cylinder gear 301 through a gear mechanism
begins to rotate at a constant speed in the counterclockwise direction in the figure.
This plate discharge drive roller 511 continues to rotate while the plate supply and discharge operation is being performed.

Then, at time _t1 , when the rotational position of the plate cylinder 3 reaches a predetermined position, the solenoid 150 is turned on and the set lever 153 is turned on, as shown in FIG.
rotates to the left around the shaft 151, and the supply/discharge plate cam 157
Then, the plate discharge cam 163 (FIG. 27) rotates to the left and is locked by the lock lever 159.

Then, when time t ₂ is reached, the solenoid 1
50 is turned off, but the supply/discharge plate cam 157 (25th
) is still locked by the lock lever 159, so the plate feeding/discharging cam 157 and the plate discharging cam 1
63 (FIG. 27) is held in the above rotational position.

When the plate cylinder 3 further rotates and reaches time _t3 , the roller 34 of the link 338 is rotated as shown in FIG.
1 rides on the supply/discharge plate cam 157, and the link 33
8 rotates clockwise around the shaft 339, and the roller 342 pushes out the link 334 toward the outer circumference of the plate cylinder.
The lock of the vise mechanism is released. This allows the claw shaft 311 to rotate to the left.

When time _t4 is reached, solenoid 146 shown in FIG. 21 is turned on. When the solenoid 146 is turned on, the drive lever 140 rotates to the left about the drive shaft 142, the operating lever 521 rotates to the right about the drive shaft 518, and the plate feeding auxiliary drive roller 520 is pressed against the plate feeding drive roller 510. Ru. As a result, the leading edge of the new plate 50 is nipped by both rollers 510 and 520. Meanwhile, the solenoid 137 shown in FIG. 22 is turned on. This solenoid 1
37 is turned on, the drive lever 131 moves to the drive shaft 1.
33 as a fulcrum, and the actuating lever 541 rotates to the left about the rotating shaft 538 as a fulcrum, and the discharge plate pressing roller 5
39 is set in a position where it comes into pressure contact with the plate cylinder 3. This "applying" operation of the discharge plate pressing roller 539 is performed when the discharge plate pressing roller 539 is located at the opening 307 of the plate cylinder 3. In addition, the solenoid 13
7, the link 165 and shaft 164 shown in FIG. 36 are rotated to the left, and the plate bottom foot reset cam 166 is set to the position shown in FIG. 37.

When time t ₅ is reached, link 3 shown in FIG.
22 roller 320 rides on the supply/discharge plate cam 157, and as shown in FIGS. 29b and 29c, the link 32
1 rotates counterclockwise together with the nail shaft 311 to hold the plate head and the nail 3
12 will be opened. Furthermore, due to the left rotation of the pawl shaft 311, the link 355 shown in FIG. 33 is rotated to the left as shown in FIG.

Then, when time _t6 is reached, the plate discharge pressing roller 539 closes the opening 30, as shown in FIG.
The plate head 50 of the old plate 50' that passes through the plate cylinder 3 and is wrapped around the plate cylinder 3.
a' is nipped by the discharge plate pressing roller 539 and the plate cylinder 3. On the other hand, as shown in Figure 27a,
The cam follower 350 rides on the plate discharge cam 163, and as the plate cylinder 3 rotates, the plate head push-out pawl 344a moves out as shown in FIG. 28, and the old plate 5 is removed.
The plate head 50a' of 0' is pushed out from the plate head positioning pin 315 (time _t7 ). As a result, the old version 5
The 0' printing head grip is released. When the time _t8 is reached, the cam follower 35 is activated as shown in FIG. 29a.
0 moves to the second cam surface 163b of the plate ejecting cam 163, the plate pushing claw 344a enters and returns to its original position. On the other hand, the top 50a' of the old edition 50' is
As shown in FIG. 29b, the plate is sent out between the plate discharge guide 517 and the plate discharge drive roller 511. In this way, the plate head 50a' of the old plate 50' is aligned with the plate ejection guide 517.
After passing between the plate discharge drive roller 511 and the plate discharge drive roller 511, the second
The plate discharge drive roller 511 shown in FIG. 2 sends out the plate to the plate discharge table 902 of the plate supply/discharge tray 9.

When time _t9 is reached, as shown in FIG. 33d,
The plate feeding presser operating roller 530 of the plate feeding/discharging unit 5 rides on the plate feeding presser roller cam 356,
The plate feeding press roller 525 shown in FIG. The ratchet 534 shown in b is the trough 529 of the ratchet foil 529.
a, and the plate feeding press roller 525 is held (locked) at the plate holding position.

Thereafter, when time _t10 is reached, the plate feeding drive roller 510 and the plate feeding auxiliary drive roller 520 are rotated by the pulse motor 509 (FIG. 18d) provided in the plate feeding/discharging unit 5, as shown in FIG. The new plate 50 that is driven and nipped between the rollers 510 and 520 starts plate feeding, and the plate head 50a
The plate head holding claw 312 and plate head positioning pin 315
It is sent out to the plate insertion space 368 in between. When the plate head 50a is sent out to a predetermined position in the plate insertion space 368 in this way, the roller 320 of the link 322 reaches the recess 157c of the plate supply/discharge cam 157 and the plate head gripping claw 312 is moved as shown in FIG. At the beginning of closing (time t ₁₁ ), the positioning pin 315 is inserted into the pin hole provided in the plate head 50a, and then the plate head 50a is held in pressure contact with the plate cylinder 3 by the plate head gripping claw 312 (time t ₁₂ ). .

While the printing process is being carried out in this way, the third
As shown in FIG. 3, as the pawl shaft 311 rotates, the plate feeding presser roller cam 356 returns from the set state shown in FIG. 3D to the reset state shown in FIG. 3C.

Immediately after gripping the plate head, as shown in FIG. 34a, the plate feeding press roller 525
passes through the opening 307 and rides on the plate cylinder 3,
The pressing of the new plate 50 onto the plate cylinder 3 is started.

Thereafter, at time _t13 , the pulse motor 50
9 is turned off, and both rollers 510, 520 (21st
The sending out of the new version 50 according to FIG. After this, the new plate 50 is nipped by both rollers 510 and 520 as shown in FIG.
The rotational force of the plate cylinder 3 pulls the plate out from the feed/discharge table 901, and the plate is wound around the plate cylinder 3 while being pressed against the plate cylinder 3 by the plate feed press roller 525 to prevent the plate from sagging. At that time, both rollers 510,
Immediately after plate feeding by 520 (FIG. 21) is stopped, the presence or absence of driven rotation of both rollers 510 and 520 is detected by the detection means. As the detection means, for example, an encoder of the pulse motor 509 is used, and the pulse motor 50 is controlled based on a command from the microprocessor 21 shown in FIG.
The presence or absence of driven rotation of both rollers 510 and 520 is detected by checking whether a predetermined number of pulses are output from the encoder within a predetermined time immediately after the roller 9 is turned off. When the driven rotation is detected, that is, when the plate head 50a is held by the plate head gripper 312, the microprocessor 21
Based on the command from (FIG. 2), the plate feeding and discharging operation continues. On the other hand, when the driven rotation is not detected, that is, when a mistake in gripping the plate head by the plate head gripping claw 312 occurs, the machine motor 20 (Fig. 1) is activated in an emergency manner based on a command from the microprocessor 21. Stop and end the plate feeding/discharging operation midway.

When the plate feeding and discharging operation continues, immediately after time _t13 , the lock lever 159 shown in FIG.
63 (FIG. 27a) is unlocked. Then, when time _t14 is reached, the plate head clamping vise mechanism is locked. That is, as shown in FIG. 31, the roller 329 of the link 327 is pressed against the plate head gripper lock cam 162, and the link 327 rotates clockwise about the shaft 328 as shown in FIG. 32. As a result, the link 331 rotates clockwise around the shaft 332, and the pin 333 is self-locked at a position where it has passed the top dead center and moved inward of the plate cylinder 3 by a slight distance from the straight line connecting the shaft 332 and the pin 335. .
In this self-locked state, the link 321 is strongly rotated to the right together with the pawl shaft 311, and a strong pressing force is applied to the plate head gripping pawl 312, so that the plate head 50a is firmly pressed and held.

When time t ₁₅ is reached, the grip on the plate end of the old plate 50' is released. That is, the roller 3 of the link 359 is connected to the plate bottom reset cam 166 shown in FIG.
61 rides on it, the link 359 rotates to the left around the shaft 360, and the link 364 rotates to the right around the shaft 365 due to the biasing force of the spring 367.
59 in its counterclockwise rotation position. link 35
9 is rotated to the left, the link 319 shown in FIG.
is pushed by the pin 362 of the link 359 and rotates clockwise together with the hook shaft 316, and the plate bottom hook 317 also rotates clockwise, causing the plate bottom hook 317 to come off the plate bottom hole 50b' of the old plate 50'. The plate bottom grip is released.

In this way, when time _t16 is reached and the plate tail 50d' of the old plate 50' shown in FIG. 22 passes the plate discharge pressing roller 539, the solenoid 137 is turned off. By turning off the solenoid 137, the drive lever 131 rotates to the left around the drive shaft 133, and the actuation lever 54 rotates to the left.
1 is rotated clockwise about the rotating shaft 538 by the biasing force of the return spring, and the plate discharge pressing roller 539 is separated from the plate cylinder 3. Thereafter, the old plate 50' is stored in the plate discharge table 902 while being fed by the plate discharge drive roller 511, and the plate discharge operation of the old plate 50' is completed.
On the other hand, by turning off the solenoid 137, the third
The link 165 and shaft 164 shown in FIG.
The plate bottom foot reset cam 166 also rotates clockwise and returns to the reset position.

Thereafter, at time _t17 , the plate tail of the new plate 50 is grabbed. That is, as shown in FIG. 40a, when the plate feeding press roller 525 passes the outer circumference of the plate cylinder 3, it enters the opening 307 due to the biasing force of the spring 527 (FIG. 34), and at this time, the new plate 50
Push the plate bottom 50c into the circumference of the plate cylinder 3. On the other hand, the third
A plate foot set cam 171 shown in FIG. 8 engages a roller 366 of a link 364. This engagement causes the link 364 to rotate counterclockwise about the shaft 365 to unlock the link 359, and the link 359 rotates clockwise about the shaft 360 due to the tensile force of the spring 363. When the link 359 rotates clockwise, the engagement between the link 319 and the pin 362 shown in FIG.
6 as well as the biasing force of the torsion coil spring 318 to rotate to the left, and the plate bottom hook 317 also rotates to the left. The operation from the engagement of the plate bottom hook set cam 171 to the counterclockwise rotation of the plate bottom hook 317 is performed in an instant, and as a result, the plate bottom hook 317 is caught in the plate bottom hole 50b of the new plate 50, and the plate bottom hook 317 is caught in the plate bottom hole 50b of the new plate 50. is tensilely biased approximately in the tangential direction of the outer circumferential surface of the plate cylinder, thereby gripping the plate end.

Immediately after the new plate 50 is wound around the plate cylinder 3 in this manner, at time _t18 , the plate feeding press roller 525 is raised. That is,
As shown in FIG. 35b, the lock release cam 306
The lock release roller 537 is kicked up, the tip of the latch 534 is removed from the valley 529a of the latch wheel 529, and the rotating shaft 524 rotates clockwise under the tension of the spring 532 shown in FIG. The roller 525 is operated away from the plate cylinder 3.

Thereafter, when time _t19 is reached, the solenoid 146 shown in FIG. 21 is turned off. As a result, the drive lever 140 is moved onto the drive shaft 14 by the biasing force of the spring 144.
2, and the operating lever 521 rotates counterclockwise about the drive shaft 518 due to the biasing force of the return spring.
The plate feeding auxiliary drive roller 520 is the plate feeding drive roller 51
Move away from 0. As a result, all plate feeding operations for the new plate 50 are completed.

In this way, plate feeding and plate discharging are performed in parallel while the plate cylinder 3 rotates about one rotation, so that the plate exchange time can be shortened and double plate feeding can be prevented.

D Effects of the above printing machine As stated above, this multicolor printing machine has the following effects:
An inking unit 7, which is configured as a unit common to each plate cylinder 3, 4, has two plate cylinders 3, 4 arranged in tandem at predetermined positions on which the waterless planographic plate 50 is wound.
8 and plate supply/discharge units 5 and 6 are individually and detachably attached corresponding to each plate cylinder 3 and 4, respectively.

In this way, this printing press is a so-called waterless lithographic printing machine that prints using a waterless plate such as a waterless lithographic plate, and does not require any dampening device like a water-filled lithographic printing machine. Therefore, although multi-color printing is possible, inking units 7 and 8 and plate supply/discharge units 5 and 6 can be arranged together around each plate cylinder 3 and 4, and automatic plate supply and discharge is possible. becomes. In addition, since the inking units 7 and 8 and the plate supply/discharge units 5 and 6 are each removably attached to the printing press body 1, the inking units 7 and 8 and the plate supply/discharge units 5 and 6 can be connected to other inking units or plate supply/discharge units. By replacing the unit, ink and plate replacement can be easily performed, or in other words, printing can be changed quickly and easily.

In the above embodiment, two plate cylinders 3,
Although a two-color printing press having four plate cylinders has been described as an example, the present invention is also applicable to a multi-color printing press having three or more plate cylinders.

(Effects of the Invention) As described above, according to the multicolor printing press of the present invention, a water-less planographic plate is used to eliminate the need for a water dampening device, and the inking device is installed on the outer peripheral surface of the ink forming roller. The ink forming roller is pressed into contact with the ink forming roller to form an ink reservoir space between the roller and the ink forming roller, and has a compact structure equipped with an ink scraping mechanism that forms a uniform ink film on the ink supplied to the outer peripheral surface of the ink forming roller. Therefore, it is possible to install multiple plate cylinders in tandem for one blanket cylinder, and it is also possible to install an inking device and a plate supply/discharge device for each plate cylinder, making multicolor printing extremely easy. Now I can do it more efficiently.

In addition, the inking device and plate supply/discharge device are each made into a unit that can be attached and removed from the same work surface of the printing press, which not only improves the operability of ink and plate replacement, but also ensures compatibility between each unit. This makes it possible to provide a multicolor printing press that is extremely superior in terms of production and maintenance.

[Brief explanation of drawings]

Fig. 1 is a schematic sectional view of a printing press that is an embodiment of the present invention, Fig. 2 is a schematic diagram showing a control system used in the printing press, Fig. 3 is a configuration diagram of an 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 amount of pushing of the doctor blade performed when the operator gives a pullback command. FIG. 19 is an explanatory diagram of the plate feeding and discharging plate presser roller locking mechanism, FIG. 20 is a diagram showing how the plate feeding and discharging plate unit is attached to the printing press main body, FIG. 21 is an explanatory diagram of the plate feeding operation, and FIG. 22 is a diagram showing the plate feeding and discharging plate unit. An explanatory diagram of the plate discharge operation, Fig. 23 is a configuration diagram of the plate supply/discharge tray, Fig. 24a is a view of the plate cylinder seen from the back side of the printing press body, Fig. 24b is a partially enlarged view, Figs. Figure 26 is an explanatory diagram of the opening and closing operation of the plate head gripping claw, Figures 27 to 29 are illustrations of the opening and closing operation of the plate head pushing claw, Figures 30 to 32 are illustrations of the operation of the plate head gripping vise mechanism, Figure 33 is an explanatory diagram of the operation of the plate feeding presser roller cam mechanism;
Fig. 34 is an explanatory diagram of the locking operation of the plate feeding press roller;
Fig. 35 is an explanatory diagram of the unlocking operation of the plate feeding press roller, Fig. 36 is an explanatory diagram of the operation of the plate bottom hook setting cam mechanism, and Figs. 37 to 41 and Fig. 42a are explanatory diagrams of the operation of the plate bottom hook operating mechanism. , Fig. 42 b, c, and d are explanatory diagrams of the operation of the plate misalignment and plate grip detection mechanism, Fig. 43 is a time chart showing the plate feeding/discharging operation, Fig. 44 is a sectional view of the plate cylinder, and Fig. 45 is a plate FIG. 46 is a flowchart showing the operation of the microprocessor when a plate change command is given. 3, 4... plate cylinder, 5, 6... plate supply/discharge unit,
7, 8...Inking unit, 50...Waterless planographic plate.

Claims (1)

[Claims] 1. A multicolor printing machine that wraps a plate supplied from a plate supply/discharge device around a plate cylinder, applies ink to the wrapped plate in an inking device, and then transfers it to a blanket cylinder for printing. In this method, a plurality of plate cylinders are arranged in tandem with respect to one blanket cylinder, and the inking device and the plate supply/discharge device are configured as a unit that is common to each plate cylinder and is detachable from the same working surface of the printing press. At the same time, the plate is a flat plate that does not require water, and the inking device includes an ink form roller and an ink reservoir space pressed against the outer peripheral surface of the ink form roller and between the ink form roller and the ink form roller. What is claimed is: 1. A multicolor printing press, comprising: an ink scraping mechanism for forming a uniform ink film on the ink supplied to the outer peripheral surface of the ink forming roller;