JPS6268756A - Inking device - Google Patents

Abstract

PURPOSE:To prevent the leak of ink while ensuring the excellent transfer of ink onto the surface of a plate by a construction wherein the front ends of end portion sealing plates fitted to the end portions of a doctor blade are made to contact oppositely with the outer peripheral edge portion of an elastic inking roller in the state wherein the end faces of the inking roller are held in pressure contact by pressure plates except for the outer peripheral edge portion thereof. CONSTITUTION:At the opposite ends of an inking roller 710, the area except the outer peripheral edge portion of the end face 710f of the roller is held in pressure contact by a pressure plate 763 fixed to a roller shaft 710a, respectively. A doctor blade 714 is held rotatably around bearing holes 760 by a construction wherein pivot bearings 746 are made to engage with bearing holes 760 provided in the upper portions of the outer side surfaces of end portion sealing plates 759 fitted to the opposite ends of the doctor blade respectively. By this constitution, an ink reserving space 747 enclosed by the blade 714, the roller 710 and the end portion sealing plates 759 is formed. The amount of pressure of the blade 714 on the roller 710 can be adjusted by controlling the amount of rotation of an eccentric roller 715 being eccentric to a rotation driving shaft 750.

Description

Detailed Description of the Invention (Industrial Application Field) This invention relates to ink R1ft used in printing presses,
In particular, the present invention relates to ink purchasing that can reliably prevent ink leakage.

(Prior art and its problems) An ink application method has been proposed in which a doctor blade is directly pressed against an ink application roller made of an elastic material such as Go 11 to form a thin ink film.
In such an inking device, the boundary conditions between the roller center and the roller end are different, and the end of the rubber roller bulges outward due to the pressure of the doctor blade, creating a gap between it and the end plate. As a result, the ink in the ink reservoir space leaks to the outside through the gap.

(Object of the Invention) The present invention was made in order to solve the above-mentioned problems, and an object of the present invention is to provide an inking device that can prevent ink leakage while ensuring good ink transfer to a printing plate.

(Means for achieving the object) In order to achieve the above object, the inking device of the present invention has the following features:
The ink deposit roller is made of an elastic material, and a doctor blade is arranged to move forward and backward on the outer circumferential surface of the ink deposit roller, and a presser plate is fixed to the roller shaft of the ink deposit U roller. By holding the end of the roller under pressure with a plate except for its outer peripheral edge, the boundary condition at the end of the roller is kept approximately equal to the boundary condition at the center of the roller, and the boundary condition formed between the doctor blade and the inking roller is Attaching end seal plates to the ends of the doctor blade for closing both side openings of the ink reservoir space,
The front end of the seal plate is brought into contact with the outer peripheral edge of the ink form roller.

(Example) The inking device of the present invention will be explained by taking the following printing machine as an example.

A. Printing 1L Graduation Structure - Figure 1 shows a schematic cross-sectional view of a multicolor offset printing machine that is capable of printing on continuous paper. As shown in the figure, the blanket If! 2 is arranged,
1 for the blanket +142 at the rear position of the soil part and the rear position of the lower part of this Plankera l-1112! If appetizer body flexible version 113. 'l are also arranged respectively.

At the rear of these plate cylinders 3 and 4] 6, the corresponding plate cylinders 3.
Automatic feeding to 4 to 111 plates is possible and J feeding/discharging plate,] Knit 5
. Supply/discharge plates 1 to 10 are detachably attached to each plate supply/discharge unit 5, 6.

On the other hand, an impression cylinder 11 is disposed at the lower front position of the planker 1-cylinder 2, and is disposed at the lower rear position and at the front position of the plunger cylinder 11. A bin feed tractor 13 and a suction conveyor 1 for controlling the feeding of continuous paper 120 passed between the planket cylinders 2
4 are arranged respectively. These bin feed 1 heractor 13 and suction conveyor 14 are the old 11 and plankera +-
III. The paper feed of the continuous paper 12 is controlled intermittently in relation to the timing of the MW cylinder 2, and the paper feed of the continuous paper 12 is controlled intermittently.
2, printing is performed. Also, at the front position of the printing press body 1, a printed continuous paper 12 is exchanged.
It has been reported that a folding machine 17 has a swing guide 15 for folding and accommodating continuous paper, and a stand 16 for a continuous paper tray that can be raised and lowered. Furthermore, an impression cylinder cleaning unit 29 for removing dirt from the impression cylinder surface is disposed below the pressure 1jW11.

Further, at the upper front position of the blanket cylinder 2, there is a cleaning liquid supply unit 18 for supplying cleaning liquid to the blanket cylinder 2 during blanket cleaning, and a wiping unit 19 for wiping off the cleaning liquid (A), which are removable. installed on.

A main motor 20 is installed in the lower space of the printing press body 1, and the blanket cylinder 2 and suction conveyor 14 are driven by the main motor 20 via, for example, a bell mill, and the blanket cylinder 2 and the plate! The Ii3, 4 and the impression cylinder 11 are mechanically interlocked by gears disposed to mesh at one end of these winter ends, forming a drive system by 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 provided as information input means for controlling the drive timing of these drive systems. Attach it where necessary.

FIG. 2 shows an outline of the control system used in this printing press.
8 is connected. The system program is stored in an external storage device 24 such as a floppy disk,
At the beginning of the system startup, it is returned to the microb [] sesera 21. The operator gives commands through the operation control panel 25 installed on the side of the printing press, takes in the necessary information from the microphone 1J and switches 26, 27, and sends the system to the system. The drive system 28, such as the motor and solenoid, is operated appropriately according to the 1 gram.

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

(1) Structure of inking unit The inking unit 7 is shown in FIG. In the same figure,
Figure (a) is a front view of the inking unit l, Figure (b) is a top view, Figure (C) is a right side view, Figure (d) is a sectional view, and Figure (e) is a left side view. FIG. 3(f) shows a plan sectional view thereof.

This inking unit 7 has left and right frames 701.7.
02 (Figures (a) and (b)) opposite side plates 701
Connecting shaft 703.704 between a and 702G (same figure (d))
The framework is constructed by passing the numbers. Left and right frames 701.
702 has rail pieces 701b, 702b protruding outwardly from one end of the side plates 70ia, 702a, and rail pieces 701b, 702b projecting outwardly from both sides 17 at the front ends of the side plates 701a, 702a. Pieces 701c and 702c are provided in a protruding manner.

In addition, at the upper part of the rear end of the side plates 701a and 702a, a notch 701 (1,702d (see figure (d), (e)) are established [
- The lower rear ends of the side plates 701a and 702a are
Arc parts 701e and 702e are finished in accordance with the outer diameter of the plate cylinder 3. Section 11-piece 701C.

A handle 705 and unit mounting screws 706a and 706b are respectively attached to the front side of 702G, and a locking piece 70
Connector 7 is connected to the back side of 2G via mounting bracket 707.
08 is taken and 1 is taken. Further, on the outer surface of the side plate 702a, a pulse motor 709 for controlling the pushing and hanging of the dowel blade is provided.
(<j-+i), and this pulse motor 709 is connected to the -F connector 708 via a cord (not shown).

Between the left and right frames 701 and 702, as shown in Fig. 3(d), there is a rubber inner
Metal kneading day-ra 711, 712. Rubber auxiliary ink applicator roller 713. Doctor blade 714 and eccentricity■
- Rough 15 is placed.

The ink adhesion tJ roller 710 has both ends of its roller shaft 71Oa mounted at predetermined positions on the side plates 701a and 702a.
The roller shaft 710a is rotatably supported by a bearing 716, and an inking gear 717 and an inking roller reversal prevention mechanism 718 are disposed at the right end of the roller shaft 710a, and a right end extension 710b and a left end of the roller shaft 710a. Interaxial distance regulating bearings 719 are respectively attached to the extension portions 710C. The ink forming roller 710 has an outer layer 710d (see FIG.
(see) is hard, and the inner layer 710e is pulled up by a two-layer roller made of soft rubber.

FIG. 4 (aL (b) shows a detailed view of the inking roller reversal prevention mechanism 718. As shown in the figure, the inking gear 717 is rotatably attached to the roller shaft 710a, and the pawl width 720 is attached to the roller shaft 710a. The inking gear 717 rotates around the shaft 710a and is connected in a J+ state. Three fulcrum pins 722 are provided upright on the outer surface of the inking gear 717 so as to surround the pawl width 720. Each arm 723 consisting of a locking ratchet pawl 723a rotates freely Y.
1. At the tip of the arm 723, a spring bearing member 724 is erected on a fixed pin 724a, and the FA
+f of 7-m 723 connected to i: la receiver 1 part +A 7
24 hours 4. :Tension] The springs 726 are each pulled down, and each arm 723 is pulled up to the fulcrum pin 722.
The claw portion 723a of the arm 723 is engaged with the claw width 720 by being rotated inwardly using the arm 723 as a fulcrum.

During printing, this reversal prevention mechanism 718 is rotationally driven in the direction (positive direction) of FIG. At this time, the claw portion 723a of the arm 723 is engaged with the claw width 720, the rotation of the inking gear t7717 is transmitted to the 1]-R shaft 710a, and the ink forming roller 710 is rotated in the forward direction. On the other hand, when printing is canceled, the inking gear 717 is set to the fourth position by manual operation from the outside.
When the arm 723 is rotated clockwise in the clockwise direction in FIG. The rotation of the ink forming roller 710 is prevented from being transmitted to the roller shaft 710a, and the ink forming (J roller 710) is kept in a stopped state. The function of preventing the ink forming roller 710 from reversing when printing is canceled is increased.

Returning again to FIG. 3, the kneading roller 711 was installed on that day by attaching both ends of the shaft 711a to the side plates 701a and 702a.
I-shaped bearing 727 (Fig. 3(C)).

Similarly, the other kneading roller 712 is supported at both ends of the roller shaft 712a in (f)) by bearings attached to the side plates 701a and 702a. 728 so as to be rotatable and swingable in the axial direction of the roller.

These kneading rollers 711 and 712 are oscillated in the roller axial direction in conjunction with the rotation of the inking roller 710. The mechanism is as follows. That is, as shown in FIGS. 3(e) and 3(f), the kneading roller 711.
712, the whirlpool cams 729 and 730 are taken f・1, 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,
A cam 733 that moves a gear X7732 that meshes with this gear A7731 is connected to a fulcrum pin 73/I protruding from the side plate 701a.
It is held rotatably using the fulcrum as the fulcrum. Kak, 1 in 733
, (2) A circumferential groove 733a inclined at λ1 () in the camshaft direction is formed on its outer circumference. And the circumferential groove 733a of /J lz 733 and )AIiM72 of cam 720.730
Between 9a and 730a, Kamft Ronoa 3/4.
735 is multiplied by 1-J I
), 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, in 4 appetizers 1rj r+-rough 1
When 0 is rotationally driven, the cam 733 rotates via the gears 731 and 732, and as the cam 733 rotates, the cam followers 734 and 735 swing around the bearings 736 and 737 due to the action of the circumferential groove 733a. [Note cam 729.730
The kneading roller 71 is oscillated in the 1-ra axial direction.
1,712 is driven to swing in the axial direction of the roller.

On the other hand, bearings 727 and 728 (Fig. 3(c) and (f)) for supporting the kneading rollers 711 and 712 are rotatably attached to the side plates 701a and 702a using poles 738 and 739 as fulcrums, respectively. , these bearings 727.
728 are connected to actuation lever 742 via links 740 and 741, respectively. This actuating lever 742 has side plates 701a and 702a with a fulcrum pin 743 as a fulcrum.
The rail piece 701b is rotatably attached to the rail piece 701b, and one end thereof passes through a slit 744 (third (b)) provided in the rail pieces 701b and 702b from below.

702b protrudes downward, and a spring locking portion 742a is formed at the upper end of the protrusion.

When this spring locking recess 742a is pushed to the left in FIG. 3(C), the operating lever 742 falls to the left about the fulcrum pin 743, and the bearing 727 rotates counterclockwise via the link 740 about the bolt 738. The kneading roller 7
The circumferential body of No. 11 is the circumferential body of the ink form roller 710, etc.
It is pressed once against the circumference of the auxiliary ink application roller 713. At the same time, the bearing 728 is connected via the link 741]
The kneading roller ruff 12 is rotated clockwise around the fulcrum 739, and the circumferential body of the kneading roller rough 12 is pressed against the circumferential body of the ink-applying rough 10. During printing, in the above pressing state, the kneading rollers 711 and 712 rotate while swinging in the roller axial direction as the ink forming roller 7100 rotates, thereby uniformizing the ink film thickness on the roller 710. The effect of song is added. In the pressed state of -, press the spring lock + into the recess 742.
When the push of a is released, the ink deposit 410-ra 710
The elastic force of the rubber pushes the kneading rollers 11, 712 back to their original positions, and the pressing force of the kneading rollers 711, 712 against the inking roller 710 is released.

The auxiliary ink deposit GJ roller 713 has its roller shaft 713
a (Fig. 3 (C), (e)) on both sides of the side plate 701a,
Bearing 7/15 attached to the specified position of 7028 ll'7
is rotatably supported. This auxiliary ink applicator roller 713 has its circumferential trunk facing the circumferential trunk of the mixing roller ruff 11, and is configured to transfer ink from the J roller 710 to the auxiliary ink applicator roller 713 via the mixing roller 711. It is composed of

The doctor blade 714 is shown in FIG. 3(d).

J shown in (G) and (h): sea urchin, end seal plate 7 on both ends
59 are mounted I-j, and the flange lx side plate 70 is installed in the bearing hole 760 provided in the outer surface of the end seal plate 759.
1a, pivot installed on 702a] to bearing 746 (third
(a), and is held rotatably around the bearing hole 760. As a result, an ink reservoir space 747 surrounded by the doctor blade 714, the ink forming roller 710, and the end seal plate 759 is formed.

The doctor blade 714 is assembled by disposing a blade body holder 714b on the soil surface side of a flat blade body 714a, and disposing a blade body supporter 714C on the lower surface side, and screwing them together. Further, a flange portion 714 is provided at the rear position of both ends of the blade main body boulder 714b.
d is provided in a protruding manner, and an elongated hole 761 for adjusting the seal plate attachment position (1) extending horizontally is bored in this flange portion 717Id.

On the other hand, the end seal plate 759 has a blade body fitting 1g 762 formed at its lower part, and is finished in an arc shape so that the front riA 759 a hangs against the outer peripheral edge of the roller end surface 710f. This end seal plate 759 has a fitting groove 76
2 while fitting the cutting edge of the blade main body 717Ia,
By aligning the lower surface 759b of the seal plate with the soil surface of the blade main body 714a and the rear surface 759c of the seal plate with the front surface of the flange 714d, it is possible to prevent ink from leaking between the doctor blade 71/I in the width direction. The Hesra card is held freely. Further, the screw 764 passed through the elongated hole 761 of the doctor blade 714 is screwed into the screw hole 759 (i) provided on the rear surface of the end seal plate 759, and by loosening the screw 764, the end seal plate 759 becomes wider. By tightening the screw 764 (4t-) at any sliding position, -I ○
One end seal 759 is configured to be secured to doctor blade 714 . The mounting position of the end seal plate 759 is adjusted to such a position that the front seal plate 759a lightly contacts the outer peripheral edge of the roller end face 710f. Seal plate 75
If the pressing force by 9 is too strong, the ink forming roller 710
This is because as the roller f rotates at high speed, the outer peripheral edge of the roller end face 710f rubs against the front end 759a of the seal plate, causing wear. Note that since the ink for waterless planography has high viscosity, even a light contact as described above can sufficiently prevent ink leakage between the end seal plate 759 and the ink form roller 710. On the other hand, on both ends of the ink forming roller 710, as shown in FIGS. 3(o) and (h), a disk-shaped presser plate 763 is fixed to the roller shaft 710a, and this presser plate 763 allows the roller end surface 710f to be fixed to the roller shaft 710a.
The area other than the outer peripheral edge of the roller is held under pressure, and the boundary conditions are adjusted to be approximately equal between the roller ends and the roller center.

With this configuration, the doctor blade door 14
When the ink ltt GJ n- is pressed against the rough 10, the roller end face 710f can be prevented from expanding and deforming outward by the holding play 1-763, and as a result,
It is possible to prevent a gap from occurring between the roller end surface 710f and the seal plate front end 7598, and to prevent ink from leaking to the outside from the gap.

Furthermore, to explain the doctor blade 714,
The inner wall surface 714e of the doctor blade 714 (in other words, the front surface of the blade main body holder 714b) is configured to be inclined downward toward the ink form roller rough 10,
Moreover, the inner wall surface 714e is treated as an ink-repellent surface. This ink-repellent surface is created by pasting or gluing an ink-repellent material, such as silicone rubber or fluororesin, on the front surface of the blade body holder 714b. With this configuration, the ink in the ink reservoir space 747 is repelled by the inner wall surface 714, e, and the repelled ink is repelled by the inner wall surface 714 by the action of a small force.
Since the ink moves downward along the downwardly inclined surface of the doctor blade 714, even if the ink consumption in the length direction of the doctor blade 714 fluctuates depending on the printing pattern of the plate, the ink is constantly suspended over the width of the doctor blade 714. The ink density is adjusted to be uniform in the width direction, making it possible to print with uniform ink density in the width direction. In addition, the inner wall surface 7
14e, so ink can be used without waste, and the doctor blade 71 after printing is finished.
4. Cleaning is also facilitated.

FIG. 3(i) shows an enlarged sectional view of the cutting edge portion of the blade body 714a. This blade main body 714a has a rounded top corner of the tip, so that the blade pushing part 7
14f and cut the lower part of the tip diagonally so as to continue with the blade pushing part 714f to form an ink rectifying part 714Ω, and this ink rectifying part 711J
The corner portion where the lower blade iT2714h intersect is defined as the ink separation portion 71/Ii.

Returning to FIG. 3(d) again, frame side plates 701a, 7
A pair of support members 748 are installed at a predetermined interval in the left and right direction on the connecting shaft 704 with a hook passed between them.
A pair of eccentric rollers 15 are held by these support fittings 748 at a predetermined interval in the left-right direction. This eccentric roller 7
15 is an inner ring 71 as shown in FIGS. 3(a) and 3(b).
The inner rings 715a of both eccentric rollers 715 are connected to each other by a connecting shaft 749. In this case, the inner ring 715a.

The rotation centers of the outer ring 715G and the connecting shaft 749 are configured to coincide with each other. j: A rotary drive shaft 750 is connected to the outer surface of the inner ring 715a of both eccentric rollers 715. The axis of this rotary drive shaft 750 is the eccentric roller 715
The rotary drive shaft 750 is eccentric with respect to the rotation center of the connecting shaft 749, and is rotatably held by a bearing 751 provided on the support member 748. This rotational drive shaft 75
The 00 rotation drive is performed by a pulse motor 709 connected to its right end via a shaft coupling 752.

The pulse motor 709 drives the rotational drive shaft 750 to the third position.
If the inner ring 715a of the eccentric roller 715 is rotated within a predetermined range in the rotational direction of FIG.
Similarly, the outer ring 715C of the eccentric roller 715 rotates eccentrically in the counterclockwise direction with respect to the rotation center of the eccentric roller 715.
The outer periphery of the doctor blade 714 is pressed against the back surface of the doctor blade 714, and its center position is moved eccentrically while its rotation is restricted, and the doctor blade 714 is pushed to the left in FIG. 3(d). Conversely, if the rotary drive shaft 750 is rotationally driven in the clockwise direction in FIG. 3(d) within a predetermined range, the outer ring 715G of the eccentric roller 715 moves to the right in FIG. 3(d), contrary to the above. However, the doctor blade 714 is pushed back to the right in FIG. 3(d) with its back surface being pressed against the pushing member 715 by the elastic force of the rubber of the ink applicator roller 710.

Therefore, the rotation drive shaft 750 is
By controlling the amount of rotation of the doctor blade 714, it is possible to adjust the pushing amount of the doctor blade 714 against the ink forming roller 710. In this embodiment, the pushing amount of the doctor blade 714 is controlled by electronic control (the details of which will be described later). It is configured to do so.

FIG. 5 is a sectional view and a front view of a main part of the inking unit 1-7 showing a mechanism necessary for controlling the pushing amount of the doctor blade 714. As shown in the figure, a waste blood detection cam 753 and a pushing limit detection cam 754 are attached to the rotary drive shaft 750, and these cams 753.75
4, the limit switch 75 for detecting the origin is activated.
5 and a push-in limit detection limit switch 756 are attached to the support member 748 via an attachment fitting 757. These limit switches 755 and 756 are electrically connected to a connector 708 shown in FIG. 3(b).

(2) Configuration of the inking unit on the NI side Next,
The configuration of the inking unit 1-7 will be explained. FIG. 6 shows a rear view of the printing press main body 1 in which the inking: I knit 7 is attached, and FIG. 7 shows a sectional view taken along the line ■--■ in FIG. 6.

First, a plate cylinder gear 301 is fixed to the right end of the plate cylinder 3, and the plate cylinder gear 301 is rotatably held by a plate cylinder support shaft 302. Plate cylinder support shaft 302 [Well, there are 8th
As shown in the figure, an eccentric shaft 303 having a rotation center 303a eccentric to the axis 302a of the plate cylinder support shaft 302 is provided.
01,102 (=t This is done by engaging the Plunge cylinder 2 of the plate 1fJ3.
The 1ll1 loading on the cylinder is carried out 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. The center distance regulating member 305 has its lower end rotatably held by the plate cylinder support shaft 302, and has four bearing holding parts 305a at its upper end for holding the center distance regulating bearings 719 of the inkings 7 to 7. is formed. 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. 18 J: Constructed as follows. In this case, the hole diameter of the positioning pin insertion hole 305b is set to be larger than the shaft diameter J of the positioning pin 103 so as not to interfere with the #1 placement of plate 1'N3 caused by the eccentric rotation of the plate cylinder support shaft 302. It is configured as follows.

On the other hand, on the inner surfaces of the left and right side plates 101 and 102, there are rail receiving pieces 1 that function as installation guides for the inking unit 7.
04 and 105 are installed at opposing positions. As shown in FIG. 9, a torsion spring 106 is attached to the upper surface of the rail receiving piece 105 with a screw 107, and the tip 106a of the spring engages with the operating lever 742 when the inking unit 7 is installed. It is placed in a position where

A torsion spring 108 is attached to the upper surface of the rail receiving piece 104 in the same manner as 61. Further, a locking member 109 is attached to the front end of the 1st side of the rail receiving piece 104, 105, and the rail piece 701b of the ink 1 is connected to the 7th rail piece 701b with the cutout lower surface 109a of the rail receiving piece 104, 105.

By engaging one surface of the rear end of 702b, ink-z,
, j-ng] The knit 7 can be held in the drawn state.

Further, a pair of inking unit support arms 110 and 111 are attached to bolts 1 on the inner surfaces of the left and right side plates 101 and 102.
12 as a fulcrum, and the rotation range of these support arms 110.111 is the same as that of the left and right side plates 101.1.
By the rotation regulating member 113 protruding from the inner surface of 02,
It is regulated within a certain range that does not interfere with the detachment/detachment+ti operation of the inking unit 7. In addition, the position of the pole l-112, in other words, the rotation center of the support arm 110, 111 is at a pressure angle α (14.5
0' ), and as a result, when the inking 7 is attached to the inking 1, the rotational drive of the plate cylinder gear 301 causes the inking gear 717 to move into the plate cylinder gear 301.
It is configured to be biased in the direction of engagement. A screw hole 114 corresponding to the 21-knit mounting screws 706a, 706b of the inking unit 7 is formed in the front surface of these support arms iii, 111. Also, the support arm 111
A limit switch 11 for detecting completion of installation of the inking unit 7 is installed at the 11th position of the hole 114.
5 is attached, the connector 117 is attached via the attachment member 116. This] connector 117 is connected to the microprocessor 21 via the control section 23 in FIG.
connected to.

On the other hand, at rear positions of the rail receiving pieces 104 and 105, a pair of release cylinder drive levers 118 for performing the llIM'j cylinder operation of the inking unit 7 are arranged at a predetermined interval in the left-right direction. These l! 11 Torso drive lever 11B
has a notch 701d of the inking unit 7 at its tip.
, 702d, and a bearing 118a that can be engaged with the bearing 118a.
The base end portion is fixed to a drive shaft 119, and the drive shaft 119 has both ends attached to the left and right side plates 101 and 102.
It is rotatably held in a bearing 120. At the right end of this drive shaft 119, a tenth
The links 121 shown in the figure are connected, and the links 121 are rotated clockwise 9! When the spring 122 for covering the link 121 is extended between the part of the link 121 and the right side plate 102, the solenoid 123 for rotating the link 121 in the counterclockwise direction is fixed to the right side plate 102. This solenoid 123 and the narrow end of 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, link 1
21 is rotationally driven in the counterclockwise direction in FIG. 10, and accordingly, the lever 118 is also rotationally driven in the counterclockwise direction in FIG. Then, when the solenoid 123 is de-energized, the link 121 returns to rotation in the clockwise direction in FIG. 10 due to the biasing force of the spring 122, and the lever 118 also rotates in the clockwise direction accordingly. Return 7 to the female operating position.

(b) Installation of the inking unit Next, the procedure for installing the inking unit 7 into the printing press main body 1 will be explained. With this installation, the winter operation within the printing press main body 1 is performed in a detuned state. That is, the plate cylinder 3 is out of tune with respect to the blanket cylinder 2, and the inking unit 7
I) III W Ijl Lever 11 for driving
8 is also in the female working position (clockwise rotation position in Figure 7).

To attach the inking units 1 to 7, hold the handle 705 with both hands and hold the inking unit 705.
In 4 Inning Konits 1 to 7 rail)'+ 701b,
702b to the rail receiving piece 104 of the printing press main body 1.
C, rail pieces 701b, 702b are attached to the front end of 105.
without sliding along the rail receiving pieces 104 and 105, and push it into the back of the printing press body 1. Inking Units 1
7 is pushed deep into the printing press body 1, the bearing 118a of the lever 118 engages with the notches 701d and 702d of the inking unit 7, as shown in FIG. is lifted slightly upward, and as a result, the rear ends of the rail pieces 701b and 702b are lifted -1 from the rail receiving pieces 104 and 105. Then,
Inking 1 pieces 1 to 7 mounting screws 706a, 706t
), inking unit 1 to support arm 110.111
When the locking pieces 701c and 702c of the inking unit 7 are tightened and fixed in the draw-hole 114, the locking pieces 701c and 702c of the inking unit 7 are lifted slightly to one side using the bolt 112 as a fulcrum, and are drawn toward the support arms 110 and 111. As a result, the front ends of the rail pieces 701b and 702b also rise from the rail receiving pieces 104 and 105. In this way, the rail piece 701b,
702b is disposed apart above the rail receiving pieces 104 and 105, allowing the next operation of attaching the inking unit 7 to be performed.

When the inking unit 7 is installed in this way,
The limit switch 115 is turned on by being pushed by the locking piece 702C, and an inking unit attachment detection signal is output to the microprocessor 21 (FIG. 2). In addition, the connector 708 attached to the inking unit 7
Connected to a connector 117 attached to the support arm 111, the motor and switches of the inking unit 7 are electrically connected to the microprocessor 21 (FIG. 2). In addition, the operating levers 7/I2 provided on both sides of the inking unit 7 are pushed by springs 106.1 (1B) installed on the rail receiving pieces 104 and 105 (see FIG. 11).
a) is rotated so as to lie down in the counterclockwise direction, and the kneaded n-rough 11,712 is pressed (J is .

In addition, the inking gear ψ717 meshes with the plate cylinder gear 301, and the center distance regulating bearing 719 engages the center distance regulating member 3.
The four bearing holding parts 305a of 05 are disposed opposite to each other.

The inking unit 7 can be removed by following the procedure reverse to the installation procedure. When inking units 1 to 7 are removed, the connection between nettaff 0 and 117 is released and the limiter (
The switch 115 is turned off, the operating lever 742 returns to the upright position, and the pressing force of the kneading rollers 711, 712 against the ink forming roller 710 is released.

The inking unit 8 has the same structure as the inking unit 7, and its inking unit 1-t2 operation is performed in the same manner as the inking unit 1-7.

(C) Operation (a) Inking 1 to 1 III cylinder movement I! to the above printing press body 1! In the inking unit 7, it is necessary to de-adjust the inking roller ruff 10 from the plate cylinder 3 when feeding it into translation or cleaning the blanket cylinder.
During printing, it is necessary to attach the roller rough 10 to the plate cylinder 3.

[Such an inking unit] ~ 7 of 11 The above work [Well, the rotation of the take-off cylinder drive lever 118, which is engaged with the notches 701d and 702d of the inking unit 7, is controlled by the solenoid 123 shown in FIG. By this line'cK
be exposed. That is, in order to wear the inking unit 7, the solenoid 123 is energized. This results in
The link 121 rotates in the outward direction in FIG.
18 is the same (rotated counterclockwise in Fig. 11(a),
The ink roller 7 rotates in the clockwise direction in FIG. A rolled version (not shown) is worn every day. In this case, the inter-axis distance regulating bearing 719 of the inking unit 7 is latched to the four bearing holding parts 305a of the inter-axis distance regulating member 305, and the ink is deposited (the roller axis 710a of the J roller 710 and the roller axis 302 of the J roller 710). The distance between the axes of the inking unit 7 is maintained at a constant distance, and as a result, the nip width between the ink forming GJ roller 710 and the plate 1i3 during printing is maintained at a constant value that is optimal for ink transfer. In order to avoid this operation, the energization to the solenoid 123 shown in FIG. 10 can be canceled.

When the solenoid 123 is de-energized, the display/cover lever 118 rotates in the clockwise direction (V) as shown in FIG. 11, and the in-fourth control unit 7 is detuned from the plate 113 by an operation opposite to the above.

Inking Konits 1-8 (Fig. 1) version Ill to 1l
11 The body mounting operation is performed in the same manner as in the case of Inking Konits [7].

(b) Regular printing operation of the inking unit Regular printing is
This is carried out with the inking unit 7 (the same applies to Inkin-31 = Guconit 8) attached to the plate cylinder 3. During this steady printing, as shown in FIG. 12, the plate cylinder 3 is rotationally driven in the counterclockwise direction.
The ink forming roller 710 is rotationally driven in the clockwise direction (forward direction) in Fig. 12 via the inking gear 717 meshed with the plate cylinder gear 301 (Fig. 11), and this ink forming roller 710 is rotated in the clockwise direction (forward direction) in Fig. 12.
Due to the rotation of the roller 710, the kneading rollers 711, 712
rotates in the counterclockwise direction while swinging in the axial direction, and the auxiliary inking roller 713 is rotationally driven in the clockwise direction.

As a result, the ink 758 accommodated in the ink reservoir space 747 is applied to the area immediately after the passage of the doctor blade 714 on the peripheral body surface of the ink deposit R' D-rough 10 according to the pushing amount of the cutting edge 714a of the doctor blade 714. After an ink film of a certain thickness is formed and the film thickness of this ink film is made uniform by a kneading roller 711 that swings in the axial direction, it is wrapped around the plate cylinder 3 and ink is applied to the image area of the printed plate. be done.

The ink on the ink layer 710 left after inking is
Again, the film thickness is made uniform by the kneading roller 712, and the ink is applied to the plate 113 again via the auxiliary ink roller 713. J3, transfer to kneading roller 712 6
In-1, which was carried out, is the ink reservoir space 747.
The paper is collected and reused for the next printing.

(C) Operation for controlling the amount of pushing of the doctor blade 711 Next, the operation for controlling the amount of pushing of the doctor blade 711 will be explained.

FIG. 13 is a diagram showing the pushing operation of the doctor blade 714 as the eccentric roller rough 15 rotates eccentrically. Same figure (
a) shows the state before the pushing operation. From this state, when the eccentric roller 715 eccentrically rotates counterclockwise, the eccentric roller 715 rotates eccentrically in the counterclockwise direction.
), the doctor blade 714 kisses the ink form roller 710, and as the amount of rotation increases, the amount of pushing into the ink forming roller 710 gradually increases (see (C) in the same figure). It is pushed in to a predetermined push-in limit position at the rotational position shown in Figure (d). When the eccentric rotation is continued (-J), the amount of ink deposited on the J roller 710 reaches the maximum amount as shown in FIG.

The principle of the pushing operation has been explained above, but in the above embodiment, the microprocessor 21 (FIG. 2) is operated so that the pushing operation is performed within the range from (b) to (d) For this purpose, the rotational position shown in the figure (b) is set to the origin position, and the rotational position shown in the figure (d) is set to the push-in limit member.Then, the origin position and the push-in limit point are set to Sensors for detection, that is, a limit switch 755 for detecting the origin and a limit switch 756 for detecting the pushing limit are mounted at positions facing the rotation drive shaft 750 as shown in FIG. 5, and these limit switches 755, A cam 753 for detecting the origin and a cam 754 for detecting the pushing limit for operating the drive shaft 756 are connected to the rotational drive shaft 75.
Attached to 0.

In this case, the origin detection limit switch 755 is turned on only within the rotation range shown in FIGS. 13(a) to 13(b).
The push limit W detection switch 1 to switch 756 is configured to be turned on only within the rotation range shown in FIGS. 13(d) to 13(e). FIG. 14 shows the limit switch 755,
756 is a diagram showing the relationship between the operating state of the blade 756 and the pushing state of the blade. In addition, as already mentioned, the rotational drive of the rotational drive shaft 75o1, in other words, the eccentric roller luff 15 is
This is done by a pulse motor 709 (FIG. 3) controlled by the microprocessor 21 (FIG. 2).

Figure 15 shows the microphone [1p[1t? 721 (FIG. 2) indicates the push-in amount control operation.

When "Inking" knit 7 is installed, first step S
1, it is determined whether or not the origin detection limit switch 755 is "on". Now, hypothetically, eccentric roller 715
When the rotation position falls within the range of Fig. 13 (a) to (1)), the limit switch 755 for detecting the origin becomes "in" as shown in Fig. 14. Proceeding to s2, the pulse motor 709 is rotated in the pushing direction (the 13th counterclockwise direction) by 10 pulses (in this -35 embodiment, it is set to push in 0.05 m with 45 pulses). After that, return to step S1 again,
The operating state of the origin detection limit switch 755 is determined again, and the limit switch 755 is turned off.
In other words, the above operation is repeated until the rotational position of the eccentric roller 715 exceeds the origin position (FIG. 13(b)).

In this way, if the rotational position of the eccentric roller 715 exceeds the origin position, or if the rotational position of the eccentric roller has exceeded the origin position from the beginning, the process advances to step S3, where the pulse motor 709 pulls back Ct by one pulse. direction (first
(clockwise direction in Figure 3). As a result, the doctor blade 714 is pulled back by one pulse due to the elastic force of the rubber of the ink coating [Noro-5710], and in step s4
Proceed to.

In step S4, it is determined again whether the limit switch 755 for detecting the origin is turned on, and if it is still ['A)'', the process returns to step 83 and the limit switch 755 for detecting the origin is turned on. 1 on” until
In other words, the above operations are repeated until the rotational position of the eccentric roller 715 reaches the blood waste position (+1) in FIG.

In this way, when the eccentric roller 715 reaches the home position, the process advances to step S5, where the pulse meter 709 presets the number of IC specified pulses (J pushing operation is performed, for example, as shown in FIG. 13(C)). , the doctor blade 714 is pushed to the standard pushing position.This standard pushing position can be changed as needed by setting the above specified number of pulses to an appropriate value. It's really good.

16 and 17 show the inking unit 7.
If the desired print density cannot be obtained at the standard push-in position of the doctor blade 714 set by the attachment of the Microphone tap ['l tl?
The operation of the sensor 21 is shown in flow chart 1.

However, when the "push key" is pressed, in step S6, the limit switch 7 for detecting the push limit is activated.
56 is on, and if it is on, that is, if the rotational position of the eccentric roller luff 15 is at the push-in limit or exceeds the push-in limit (go to (d) in FIG. 13). ), it is necessary to prohibit further pushing, so proceed to step Si, sound the beep (f-), and end the work.

-15. 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 M of 0, 05#) has been performed, and if the pushing operation for 45 pulses has not been performed, the process returns to step S9. Returning to S6, the above operation is repeated until the pushing operation for 45 pulses is completed. In this way, when the doctor blade 714 is pushed in by 0.05 m after performing the pushing operation for 45 pulses, the work is completed. In this way, it is 0.05m with one key operation [Since the throat blade 717'l is pushed in, it is necessary to press the blade 717'l the number of times equivalent to the number of strokes to reach the desired pushing amount.
i'Jet, Ding J, I.

On the other hand, when [PULL RETURN -1-1] is pressed, it is determined in step S10 whether the origin detection limit switch 755 is 1 ON-1 or
That is, the rotational position of the eccentric roller rough 15 is between the origin t and the n point f.
If it exceeds the 10 position (states shown in FIGS. 13(b) to 13(a)), it is necessary to prohibit each pullback, so proceed to step 811, sound the buzzer, and end work n. do. On the other hand, if the lifting platform is in step S10 a3 and the limit switch 755 for detecting the origin is "h<r off", the process proceeds to step S12, and the pulse motor 709 performs a pullback operation by one pulse. Immediately proceed to step S13,
Here, it is determined whether or not the pull-back operation for 45 pulses (corresponding to the pull-back interval of 0.05 m) has been performed, and if the pull-back operation for 45 pulses has not been performed, it returns to the slide S10 again. , the above operation is repeated until the pullback operation for 45 pulses has been performed. In this way, when the doctor blade 714 is pulled back by 0.05#lIR by performing the pullback operation for 45 pulses, the work is completed. This retracting work can also be done by pressing the doctor blade 714 by 0.05m#+ with one key operation.
is pulled back, so in order to obtain the desired pulled back ant, it is only necessary to perform key operations the corresponding number of times. Here 1
The small blade that can be moved by key operation is ('), 05M.
(equivalent to 45 pulses), but you can also change this value.
Of course it is possible.

In this way, the amount of rotation of the eccentric roller 715 that is eccentric with respect to the rotational drive shaft 750 is controlled by the pulse motor 709, and the amount of pushing of the doctor blade 714 against the inking roller 710 can be adjusted. With a simple operation, it is possible to finely adjust the pushing amount, in other words, it is possible to finely adjust the ink film thickness of the ink depositing roller 1-J roller 710, and it is possible to control printing SI with high precision.

Also, as the pushing amount increases, the ink forming roller 710
The eccentric roller 715
Since the phase is selected, even if the reaction force from the ink roller rough 10 increases by increasing the number of pushing stones, it will not interfere with rotating the eccentric roller rough 15 with the pulse motor. In other words, 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 will be around the rotation angle at which printing density control is performed. In this case, it is possible to finely adjust the pushing amount according to changes in the rotation angle.Furthermore, as shown in FIG. Limit (because there is a limit,
Even if the rotary drive shaft 750 operates abnormally, the ink will not be deposited.
I was worried about causing an irreparable dent to the J Roller 710 4F.
stomach.

(d) Function of the presser plate As shown in FIGS. 3(rh) and (h), a presser plate h 763 is fixed to the first roller shaft 710a at both ends of the inking roller rough 10, and the presser plate 763 is used to fix the roller end face 710f. The area other than the outer peripheral edge of the roller is held under pressure, and the boundary W condition of the roller end is adjusted to be approximately equal to that of the center of the roller. Also, Doctor Blade 7
The front end 7 of the end seal plate 759 attached to the end of 14
59a is brought into contact with the outer peripheral edge of the roller end face 710f.

With this configuration, when the doctor blade 714 is pushed against the ink forming roller 710, the pressing plate 763 can prevent the roller end surface 710f from expanding outward, and as a result, the roller End face 71
Since no gap is generated between Of and the front end 759a of the seal plate, ink leakage can be prevented. In addition, the end seal plate 759
Since the doctor blade 714 is slidably adjustable in the width direction of the doctor blade 714, dimensional errors in the roll length of the ink forming roller 710 can be easily and reliably absorbed. Of course, since the ink applicator roller 710 is made of a bullet material such as rubber, the ink can be transferred to the printing plate well.

(e) Effect of the inner wall surface of the doctor blade As shown in FIG. 3(d), the inner wall surface 7140 of the doctor blade 714 is directed toward the roller 710.
The inner wall surface 714 is configured to slope downward.
e is finished with an ink-repellent surface. I's conclusion T1
In-1; The ink in the reservoir space 7/'I7 is
14e while moving downward along the downwardly inclined surface of the inner wall surface 714e under the action of a small force. Hanging is Doctor Blade 71/
It is adjusted to be uniform in the width direction of I, and printing with an ink depth of 1σ that is uniform in the width direction is possible. In addition, the inner wall surface 71
Since in 4- remains in 4e, ink can be used without waste, and the doctor blade 714 can be easily cleaned after printing is completed.

(f) Two-layer structure of the ink forming roller and the effect of the doctor blade As shown in FIG.
It has a layered structure. Figure 18 shows the above ink@
It is a figure showing the deformation state by pushing +f D- rough 10. However, in FIG. 18, the aspect ratio is changed to make it easier to understand the deformed state. In the figure, curve A shows the roller shape when the ink form roller 710 is stationary without pushing in the doctor blade 714, and curve B shows the shape of the doctor blade 714 when the ink form roller 710 is stationary for a predetermined period of time. Curve C shows the roller deformation when the ink form roller 710 is rotated while the doctor blade 714 is kept in the pushed position. As shown in the above curve C, as an ink forming roller,
When using an inking roller 710 with a two-layer structure in which the surface layer is made of harder rubber than the inner layer, the roller 710 is
When the doctor blade 714 is pressed against the doctor blade 714, the deformation of the roller 710 extends to the inside of the roller, thereby further preventing local deformation as in the case of rollers. -4/I - spreads over the entire area with the ink forming roller 710 centered, and bulges do not occur, so it is possible to reduce the uneven thickness of the ink film formed on the surface of the ink form roller 710, and it is uniform in the roller axial direction (width direction). It becomes possible to form an ink film of a certain thickness.

On the other hand, as shown in FIG. 3(i), the doctor blade 714 has a blade pushing part 714f, an ink rectifying part 714q, and an ink separating part 7141 formed at the cutting edge of the blade body 71/4a. . This doctor blade 7
The action of No. 14 is as follows. That is, when the ink applicator roller 710 is rotated in the direction of the arrow in the state shown in FIG. Since the ink reservoir space 747 has a rounded finish, the ink 758 in the ink reservoir space 747 passes smoothly between the blade pushing part 714f and the roller surface without stagnation, is sent out to the rectifying part 7140 side, and then flows into a straight line. The ink is rectified when passing between the ink rectifier 7140 and the roller surface. As a result, a thin ink film 758a that is uniform in the width direction and stable over time is formed on the roller surface. Furthermore, when the ink 758 is extracted from the rectifying section of the ink rectifying section 714q, the ink is removed from the lower side of the blade 714h by the action of the ink separating section 7141.
This prevents ink from being transferred to the side and avoids ink dripping from the blade.

Actually, the ink form roller 710. When an experiment was conducted using the ink 758 and the blade body 714a under the following conditions, favorable results were obtained.

■ As the ink form roller 710, the rubber hardness is 5.
A two-layer roller with a diameter of 80 m+ and an internal angle of 0 rα and an internal angle of 27 degrees was used.

(2) As Ink 758, a waterless lithographic ink with a viscosity of 500 to 3000 poise was used.

■ As for the blade body 714a (Fig. 3 (i)), the material is specially quenched m (HWD-2FG)r, the total height Hl = 0.6 m, and the height of the blade pushing part 714f 112 = 0, 2m, radius of soil curve R1 of blade pushing part 714f = 0.26M.

Front curve radius R2 = 0, 12mm, angle 01-6
A blade main body having an angle of 0 degrees and θ2-53 degrees was used.

In addition, ink application roller rough 10. It goes without saying that the conditions for the ink 758 and the blade body 714a are not limited to those described above. Maruko,
Although the ink layer 710 has a two-layer structure in the second embodiment, it is not necessarily limited to a two-layer structure. Any multilayer structure may be used as long as the hardness is set to be greater than that of the inner layer.

(Effects of the Invention) As described above, according to the inking device of the present invention, the ink forming roller is made of an elastic material, and the presser plate allows
By holding the end of the roller under pressure except for its outer periphery, the boundary condition of the end of the roller is kept almost equal to that of the center of the roller. Since the front end is brought into contact with the outer peripheral edge of the ink applicator roller, an effect of preventing ink leakage while ensuring good ink transfer to the plate surface is achieved.

−’II　　　　−

[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 is a block diagram of the ink form roller reversal prevention mechanism, Figure 5 is a block diagram of the main parts of the inking unit, Figure 6 is a partial rear view of the printing press main body before the in-young unit is installed, and Figure 7 is the Figure ■ - V FIG. 10 is a diagram showing the drive mechanism of the Inking Conit detachment cylinder drive lever, FIG. 11 is a diagram showing the installed state of the Inking Conit, and FIG. 12 is a diagram showing the Inking Conit 1 to 1. Fig. 13 is a diagram explaining the pushing operation of the doctor blade, and Fig. 14 is a diagram showing the relationship between the operating state of the limit switch for detecting the origin and the limit switch for detecting the pushing limit and the pushing state of the blade. Figure 1 showing
Figure 5 is a flowchart showing the doctor blade push/hang control operation performed when the inking unit is installed, and Figure 16 shows the doctor blade push amount control operation performed when a push command is given by the operator. Flow chart, FIG. 17 is a diagram showing the pushing amount control operation of the doctor blade performed when the operator is given a pullback command, FIG. 18 is a diagram showing the state of deformation of the ink form roller due to blade pushing, FIG. 19 is an explanatory diagram of the action of the ink@C) roller blade. 710... Ink No. 6-J T1-A, 710a...
・Roller shaft, 710f...Roller end face, 714...
Doctor blade, 747... Ink reservoir space, 759... End seal plate, 759a... Front end, 76
3... Presser plate

Claims (2)

[Claims] (1) An elastic ink applicator roller, which is fixed to the roller shaft of the ink applicator roller, and holds the end face of the roller under pressure except for the outer peripheral edge so that the boundary condition at the end of the roller is approximately equal to that at the center of the roller. a presser plate; a doctor blade disposed so as to be movable forward and backward with respect to the outer peripheral surface of the ink form roller; An inking device comprising an end seal plate attached to an end of a blade and having a front end facing an outer peripheral edge of the end face of the inking roller. (2) The inking device according to claim 1, wherein the end seal plate is slidably held in the width direction of the doctor blade and fixed at any sliding position.