JPH0149624B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ink fountain device for continuously flowing out a predetermined amount of ink in an ink fountain in a printing press.

The inking device that supplies printing ink to the plate mounted on the plate cylinder of a rotary printing press consists of an ink fountain device that drains the ink stored in the ink fountain in predetermined amounts, and an ink fountain device that drains the ink stored in the ink fountain in predetermined amounts. The ink fountain device has a conventional structure as shown in FIG. 1, a sectional view of which is shown in FIG. That is, diagonally below the ink fountain roller 1, which rotates in the direction shown by arrow A in the figure, stays 2 and 3, which are approximately the same length, are arranged, and on the stay 2 are blades of the same length. stand 4
is attached with bolt 5. An ink blade 6 of the same length made of a thin steel plate is screwed onto this blade stand 4 with its tip very close to the circumferential surface of the ink fountain roller 1. A shaped ink well 7 is provided. Further, L-shaped adjustment pieces 8 are pivotally attached to the other stay 3 in parallel at intervals of 20 to 50 mm, and adjustment screws 9 are screwed into the corresponding adjustment pieces 8. There is. And ink fountain roller 1
Ink 10 is contained in an ink fountain surrounded by an ink blade 6 and an ink well 7 on both sides.
is stored, and this ink 10 is mixed with the ink blade 6 by the rotation of the ink fountain roller 1.
An ink film is formed on the surface of the ink fountain roller 1 by the ink 10 that flows out from the gap between the ink fountain roller 1 and the ink fountain roller 1 . To adjust the ink film thickness, that is, the amount of ink supplied to the plate, the adjusting screw 9 is rotated back and forth, and the ink blade 6 is elastically deformed via the adjusting piece 8. This is done by adjusting the gap with the circumferential surface of the The amount of ink is adjusted for each section divided in the axial direction of the ink fountain roller 1, that is, in the axial direction of the plate cylinder, by moving the adjusting screws 9 back and forth individually. The amount of ink is adjusted according to the density of the ink.

However, in the conventional ink fountain device configured as described above, since the ink blade 6 is formed of a single plate, for example, as shown in FIG. If you want to reduce the amount of ink at the location where the ink blade is applied and increase the amount of ink at the location corresponding to the adjustment screw 9C in the middle, you can also pull the adjustment screw 9C while pressing the adjustment screws 9A and 9B. 6 remains deformed by the adjustment screws 9A and 9B on both sides and does not respond to adjustment by the adjustment screw 9C. Therefore, I had no choice but to pull the adjustment screws 9A and 9B on both sides a little to make the adjustment, which resulted in the problem that only a rough adjustment as shown in FIG. 3 was possible. In addition, pressing one adjusting screw 9 affects both sides of the adjusting screw 9, so accurate adjustment cannot be expected.

Therefore, in order to eliminate this problem, an ink fountain device using a split blade method, in which the ink blade 6 is divided into a plurality of parts in the axial direction of the ink fountain roller 1 and can be adjusted individually, has been developed. Various proposals have been made. In this type of ink fountain device, since it is necessary to change the ink film thickness for each divided blade, high precision is required for adjustment, and adaptability to remote control is required. Further, since the split blade must be frequently removed for maintenance, cleaning, color change, etc., the blade portion and the adjustment mechanism portion must be assembled in a separate state. However, none of the conventionally proposed devices has met all of these conditions, and there has been a demand for the development of one.

The present invention has been made in view of the above points, and includes an adjustment lever that is pivotally supported on a blade stand, and a roller that is pivotally attached to one free end of the adjustment lever that is opposed to the rear end surface of the split blade that is parallel to the blade stand. Along with letting
A sliding member whose working end is engaged with the other free end of the adjustment lever is slid by an adjustment screw to move the split blade back and forth to adjust the gap between the blade and the ink fountain roller. By separating the and adjustment mechanism parts and eliminating play between each part, it is possible to adjust the ink amount for each divided section with high precision and excellent reproducibility, and it is extremely adaptable to remote control. The present invention provides an ink fountain device for a high quality printing press.

Hereinafter, its configuration and the like will be explained in detail with reference to embodiments shown in the drawings.

4 to 7 show an ink fountain device according to the present invention, FIG. 4 is a longitudinal sectional view thereof, FIG. 5 is an enlarged sectional view thereof, FIG. 6 is a plan view, and FIG. FIG. In these figures, an ink fountain device 11 includes an ink fountain roller 12 that is pivotally supported on a machine frame and rotates in the direction shown by arrow C in the figures.
A support shaft 13 is provided diagonally below the support shaft.
It is supported between the machine frames at both ends. A blade stand 14, which has approximately the same length as the ink fountain roller 12, is fitted and fixed onto this support shaft 13, with the blade stand 14 inclined so that the front end of its upper end face is lowered.
Further, at the upper rear end of the blade stand 14, there is a square stay 15 having a rectangular cross section and approximately the same length as the blade stand 14.
is installed with both ends supported by the end steps on both sides of the blade stand 14, and furthermore, on the lower surface thereof,
A small stay 16 having the same length as the square stay 15 is attached to both ends with bolts 18 via a spacer 17.

A plurality of divided blades 19 and the same number of gap adjustment mechanisms are attached to the ink fountain device main body, which is thus integrally assembled with the blade stand 14, the square stay 15, and the small stay 16.
That is, the divided blades 19 are formed in the shape of a short fence, and are formed on the finished surface of the upper end of the blade stand 14, with their side finished surfaces in close contact with each other, and are movable toward and away from the ink fountain roller 12. 12 are arranged in parallel in the axial direction, and the blade stands 14
The sides are pressed together by adjustable spring devices (not shown) provided at both ends. Further, the head of an eccentric pin 21 rotatably fitted into a pin hole on the upper surface of the blade stand 14 is inserted into the through hole 20 bored in the split blade 19, and the head of the eccentric pin 21 is fitted into the upper surface of the head. A driver groove is provided, and a pin-shaped spring receiver 22 is implanted at an eccentric portion of the eccentric pin 21 with respect to the axis thereof. In addition, a compression coil spring 2 is provided in a spring groove 23 provided in the upper half of the rear end of the split blade 19 in communication with the through hole 20.
4 is interposed between the spring receiver 22 and the spring groove rear wall 25, and by rotating the eccentric pin 21 by 180 degrees, the spring receiver 22 is elastically supported between the spring receiver 22 and the rear wall 25. It is designed to free you from
As the spring receiver 22 is elastically supported, the split blade 19 is urged toward the blade stand 14 in a direction away from the ink fountain roller 12 via the eccentric pin 21, and the spring receiver 22 is released from the elastic support. By doing so, the split blade 19 can be removed from the blade stand 14. A ball 2 that locks the rotation of the eccentric pin 21 in both the resiliently held and released positions is provided.
6 and a compression coil spring 27 is provided.

On the upper surface of the split blade 19 held in this way, a holding plate 28 made of a thin steel plate and having approximately the same length as the full width of the split blade 19 is superimposed with the bottom surface of the split blade 19 in close contact with the split blade 19. , the rear end portion is fixed to the upper rear end step portion of the square stay 15. And, in the split blade 19,
The blade 19 is formed into a cylindrical shape and divides the presser plate 28.
Magnet 29 that magnetically attracts the
and a magnet 30 that magnetically attracts the divided blade 19 so as to bring it into close contact with the blade stand 14 are buried in parallel in the front and back.

Next, a gap adjustment mechanism provided for each divided blade 19 will be explained. That is, between the small stay 16 and the lower rear end of the blade stand 14, a plurality of sets of adjustment units, generally designated by the reference numeral 31, are installed corresponding to the respective divided blades 19. This adjustment unit 31
is equipped with a short fence-like board 32 that connects the small stay 16 and the blade stand 14, and this board 32 has a motor 33 and a potentiometer 34 connected to a control panel (not shown) connected to the rotating shaft. are attached to the top and bottom of the board 32 so as to protrude to the rear. Further, a bracket 35 attached to the back side of the corner stay 15 has a knob 36 and a gear 37.
An adjusting screw 38 whose movement in the axial direction is restricted is pivotally supported. As shown in the gear arrangement in FIG. 7, a gear 39 pivotally attached to the rotating shaft of the potentiometer 34 and a gear 40 pivotally attached to the rotating shaft of the motor 33 are connected to the base plate 32 and the outer plate. The gear 41 is drive-coupled via an intermediate gear 42 on a gear shaft pivotally supported by the gear 40 and the gear 40, which is integral with the gear 40.
3 and the gear 37 on the adjustment screw 38 are drivingly connected via an intermediate gear 44 on a gear shaft pivotally supported by the base plate 32 and the outer plate 41.

On the other hand, between the square stay 15 and the small stay 16, there is a slider 45 as a sliding member, which is slightly narrower than the split blade 19 and whose front half is formed into a U-shape in plan view. The adjustment screw 38 is screwed into the internal threaded portion of the adjustment screw 38. On the other hand, on the front side of the corner stay 15, there is a bracket 46 whose front half is formed into a U-shape when viewed from above.
is attached by a bolt 47, and a pivot 48 is attached to the U-shaped portion at the tip of the dry bearing 4.
9, it is rotatably supported. and,
At the center of this pivot 48, an adjustment lever 50 is located.
The upper end of the adjustment lever 50 is fitted and fixed by a set screw 51, and one free end located eccentrically with respect to the pivot portion of the adjustment lever 50 has a roller shaft 52.
is fixed with a set screw. and,
At the center of the roller shaft 52, a roller 53 formed by a ball bearing is attached to the circumferential surface of the divided blade 1.
9, and is rotatably fitted in contact with the rear end surface of 9. Furthermore, a long groove 54 is provided at the lower end, which is the other free end, of the adjustment lever 50, and the slider 45 is engaged with this long groove 54 by a pin 55 provided at its working end. has been done. Further, a roller 56 is pivotally mounted near this engaging portion, and the blade stand 1 is attached to the circumferential surface of this roller 56.
A push pin 58 is slidably supported by the blade base 14 and urged by a compression coil spring 57 interposed between the blade base 14 and the blade base 14 . By doing so, the slider 45 is biased in one direction and absorbs the play in the threaded portion.

The operation of the ink fountain device 11 configured as above will be explained. Prior to printing, the ink fountain roller 12, split blade 19 and presser plate 28 are removed.
and ink wells 6 provided at both ends of the presser plate 28.
Ink 61 is stored in the ink pot surrounded by 0 and 0. When the printing operation is started, the ink 61 continuously flows out from the gap between the ink fountain roller 12 and the splitting blade 19, which is indicated by the symbol _t1 in the figure, due to the rotation of the ink fountain roller 12. An ink film is formed on the surface of the plate, and this ink film is supplied to the plate surface on the plate cylinder via a large number of roller groups.

In such an ink fountain device 11, as described above, the amount of ink for each section divided in the axial direction of the ink fountain roller 12 is calculated as follows.
It must be adjusted to match the pattern of the printed material. The operation of the adjustment mechanism will now be explained. First, when assembling the device, the adjustment mechanism for each split blade 19 is zero-adjusted. That is, after setting the distance between the gear 37 and the slider 45 to a predetermined dimension, align the marking lines provided in advance on the adjustment lever 50 and the pivot 48, and then tighten the set screw 51.
Fix both together. Then, set the potentiometer 34 to the zero position and hold it with one hand so that it does not rotate, and hold the knob 36 with the other hand until the adjustment lever 50 is pressed until the tip of the split blade 19 comes into contact with the circumferential surface of the ink fountain roller 12. Perform zero adjustment by rotating. After performing zero adjustment in this manner, the operator determines the ink output amount for each section by looking at the proof in front of the control panel, and presses the button corresponding to the section number 62 in FIG. Adjust the amount of ink by operating the button. That is, when the push button is operated, the motor 33 rotates and the gears 39, 42, 4
The rotations are transmitted in the order of 0, 43, 44, and 37, and the adjustment screw 38 rotates. This will cause slider 4
5 moves back and forth, and the engagement between the pin 55 and the long groove 54 causes the adjustment lever 50 to swing within the range shown by solid lines and chain lines in FIG. Therefore, the axis 48
3 is eccentric, the roller 53 is displaced in an arc shape centered on the shaft support of the pivot 48, and as a component of this displacement, it is also displaced in the direction toward and away from the ink fountain roller 12. And the split blade 19
However, since the split blade 53 is integrated with respect to this displacement direction by the compression coil spring 24, the split blade 19 also moves by this displacement, and the gap t ₁ between its tip and the ink fountain roller 12, that is, the amount of ink Adjustment is made for each divided blade 19, and the potentiometer 34 detects the rotation of the adjustment screw 38 through a gear and issues a signal.
The operator can check the adjustment results on a remote control panel. In this case, since the adjustment lever 50 and the slider 45 are biased by the compression coil spring 57, and the split blade 19 is biased by the compression coil spring 24, there is no backlash at all, and the rotation angle of the adjustment screw 38 is Alternatively, highly accurate clearance adjustment that is correctly proportional to the rotational speed is performed. In addition, the rollers 53 directly push and pull the split blade 19 in the direction of adjusting the gap,
Even if the adjustment lever 50 is rotated to the full adjustment range, the contact point of the roller 53 against the split blade 19 hardly moves, so not only does the force that moves the split blade 19 up and down not work, but the pressing part of the split blade 19 Because it is rolling friction,
There is no twisting, the movement is extremely smooth, and there is no wear on each part. The rotary motion of the shaft is decelerated by a gear and a screw shaft, converted into swinging motion of the adjustment lever 50, and furthermore, the split blade 19 is slightly displaced by eccentric action, which not only allows for highly accurate adjustment. As shown in this embodiment, it is easy to drive this by a motor and remotely control it.

Then, between printing operations, the split blade 1
9 often needs to be removed from the blade stand 14 for maintenance, cleaning, color change operations, and the like. In this case, in this device, the presser plate 2
8 and insert a screwdriver into the through hole 20 of the split blade 19 to rotate the eccentric shaft 21 by 180 degrees, the spring receiver 22 eccentrically rotates and the compression coil spring 24
Since the compression of the split blade 19 is released and the elastic force is lost, the split blade 19 can be easily taken out. That is, the blade part and the adjustment mechanism part are assembled in a completely separated state, and the divided blade 1
9 can be attached and detached independently of the adjustment mechanism, so the adjusted state can be perfectly reproduced after reassembly.

Furthermore, in this embodiment, the split blade 19
is held down by the holding plate 28, and the magnets 29 and 30 are embedded in the split blade 19, so that the holding plate 28, the split blade 19, and the blade stand 14 are pressed together, and the ink 61 in the ink fountain is transferred to the split blade 19.
No intrusion into the upper and lower sliding surfaces. Therefore, there is no possibility that ink or ink scum is attached and the forward and backward movement of the split blade 19 becomes difficult, the adjustment work is performed extremely smoothly, and there is no need for troublesome ink scum removal work.

As is clear from the above description, according to the present invention, in the ink fountain device of a printing press, the adjustment lever is pivotally supported on the blade stand, and the rollers, which are pivotally attached to one free end of the adjustment lever, are arranged in parallel on the blade stand. The dividing blade is moved forward and backward by sliding the sliding member, which is brought into contact with the rear end surface of the dividing blade and whose working end is engaged with the free end of the adjustment lever, with the adjustment screw, and the ink fountain roller and By configuring the gap to be adjusted, it is possible to completely eliminate bumps between each part between the adjustment operation section and the split blade, and by connecting the roller to the split blade, it is possible to directly push and pull in the direction of the gap adjustment. Therefore, by adjusting the gap between the blade and the ink fountain roller, the amount of ink can be adjusted with extremely high precision for each divided section. In addition to being able to accommodate this, it is also possible to prevent wear of each part. In addition, since the blade section and adjustment mechanism section are completely separated, it is possible to attach and detach the split blades for cleaning, color changes, etc., regardless of the adjustment mechanism, and redo the adjustment after reassembling. It is unnecessary and extremely efficient. Furthermore, the rotational motion of the shaft is transmitted to the split blades via gears, screws, and adjustment levers, making it easy to drive the shaft with a motor and detect its rotation, making it adaptable to remote control. is extremely good.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of a conventional ink fountain device, FIGS. 2 and 3 are illustrations of the ink amount adjustment operation, and FIGS. 4 to 8 show an ink fountain device for a printing press according to the present invention. 4 is a longitudinal sectional view thereof, FIG. 5 is an enlarged sectional view, FIG. 6 is a plan view, FIG. 7 is a rear view of FIG. It is an enlarged view of. 11... Ink fountain device, 12... Ink fountain roller, 14... Blade stand, 19... Division blade, 24... Compression coil spring, 38... Adjustment screw, 45... Slider, 50... Adjustment lever, 5
3...Roller, 57...Compression coil spring.

Claims (1)

[Claims] 1. A plurality of divided blades formed to be able to move forward and backward in a direction toward and away from the circumferential surface of an ink fountain roller, and arranged in parallel in the axial direction of the roller on a blade stand, and the divided blades are moved from the roller to the blade stand. a spring member biasing the blades in a direction of separation; an adjustment lever having a circumferential surface of a roller pivotally supported on the blade stand side and pivotally attached to one free end side facing the rear end surface of the split blade; A sliding member is supported on the stand so as to be able to move back and forth in a direction substantially parallel to the split blade, and has its active end engaged with the other free end of the adjustment lever, and is screwed into the threaded portion of the sliding member. An ink fountain device for a printing press, comprising: an adjusting screw; and a spring member biasing the sliding member in one direction relative to the blade stand.