JPH02257Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water supply roller device for attaching dampening water drawn up from a water boat by a water fountain roller to a printing plate in a paper web rotary printing press.

A continuous water supply device is known as a type of water supply device that supplies dampening water to a plate on a plate cylinder in a rotary printing press. This type of water supply device generally consists of a water bucket that stores dampening water, a water fountain roller that rotates within the fountain to pull up the dampening water, and a water fountain roller that pulls up the dampening water between the fountain roller and the plate cylinder. The dampening roller device sequentially transfers the dampening water and supplies it to the plate on the plate cylinder. Of these, the forming roller device consists of a forming roller that is formed to be detachably attached to the plate cylinder, a metering roller that is arranged between the forming roller and the water base roller so that their peripheral surfaces face each other, and a transfer roller. It is equipped with a group of rollers such as rollers.

In such a water feed roller device, the contact pressure of the roller against the plate cylinder is extremely important in order to maintain the printing durability of the plate, suppress vibrations generated at the plate mounting area, and prevent quality deterioration. occupies a large number of elements.

On the other hand, in a rotary printing press, the plate is formed into a certain shape by an external plate bending machine and then attached to the plate cylinder, but this plate bending process may cause the plate to be misaligned, or the plate may be If the product is crooked during the installation process, and as a result exceeds the allowable registration error, this must be corrected by some method. Conventionally, therefore, if the entire printing plate is misaligned in the circumferential or axial direction of the printing cylinder, this is corrected during machine operation using a known correction device. In addition, if the left and right sides of the plate are twisted and attached to the plate cylinder, removing the left and right sides and bending them again causes problems such as a loss of time and a decrease in the strength of the plate, and it is difficult to ensure accuracy after reinstallation. Since this is not possible, so-called plate cylinder twist adjustment is carried out, in which the plate remains attached to the plate cylinder and the plate cylinder is twisted relative to the blanket cylinder to slightly shift the axes of both cylinders. This twist adjustment is achieved by rotating one plate cylinder bearing, which is formed so that the outer circumferential surface supported by the frame and the inner circumferential surface supporting the plate cylinder are eccentric, relative to the other bearing. This is done by slightly shifting the phase.

As explained above, in rotary printing presses,
Adjustment of the contact pressure of the formation roller against the plate cylinder and adjustment of the twist of the plate cylinder are often performed in tandem. Conventionally, the procedure for this is to first adjust the contact pressure of the formation roller before printing, and then perform test printing. In many cases, the method is to check the plate and adjust the twist if there is a twist in the plate. In this way, if the twist adjustment is performed later, the axis of the plate cylinder will move, and the contact pressure of the forming roller that has been painstakingly adjusted will change, and the contact pressure will have to be adjusted again. Adjustment is troublesome and takes a long time, and the non-operating time of the machine is extended, which greatly reduces productivity.

Furthermore, although the attachment/detachment of the formation roller to and from the plate cylinder and the adjustment of the contact pressure are the same operations in that they change the distance between the axes of the plate cylinder and the formation roller,
In conventional devices, these are performed by separate mechanisms, resulting in a complex structure and an inability to simplify operations.

The present invention was developed in view of the above points, and by bringing the free end of the lever that rotates around the transfer roller into contact with the plate cylinder of the forming roller supported on the free end side of the lever. A pair of left and right pins are provided to regulate the contact pressure, and one of these pins is pivotally supported on the frame by eccentrically connecting its lever abutting portion and frame shaft support to adjust the twist of the frame shaft support and plate cylinder. By connecting the eccentric bearing with a four-bar link, the axial center of the forming roller moves to follow the movement of the axis of the plate cylinder due to twist adjustment, and the contact between the forming roller and the plate cylinder is maintained regardless of the twist adjustment. The present invention provides a water-feeding roller device for a web-fed rotary printing press configured to maintain constant pressure at all times. Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

Figures 1 to 3 show an embodiment of the water supply roller device according to the present invention, Figure 1 is a side view of the water supply device implementing this as seen from the inside of the drive side frame, and Figure 2 is the same. FIG. 3 is a side view of the operation side frame viewed from the outside, and a developed vertical sectional view of the water supply roller device. In these figures, the printing unit of the web-fed rotary printing press is equipped with a frame 1 on the driving side and a frame 2 on the operating side, both frames 1 and 2 having printing plates mounted on their circumferential surfaces. A plate cylinder 3 that rotates in the direction shown by arrow A in the figure is supported pivotally. A plurality of ink application rollers 4 provided in an inking device that supplies printing ink to the plate surface of the plate cylinder 3 are attached and detached by being supported by a roller arm that swings around a swinging roller 5. They are freely confronted. Further, below the plate cylinder 3, there is a blanket cylinder 6 in contact with the plate cylinder 3, onto which an image formed on the plate surface is transferred using ink from an inking device and dampening water from a water supply device 7, which will be described later. It is pivoted.

The water supply device 7 is equipped with a water canteen 9 that stores dampening water 8, and the dampening water can be poured into the water cannula 9 by immersing it in the dampening water 8 and rotating it in the direction shown by arrow B in the figure. A water head roller 10 for pulling up the water 8 is provided. Furthermore, above the water base roller 10, there is a pressure regulating roller 11 that rotates in the direction shown by arrow C in the figure.
It is disposed opposite to the water base roller 10, and is configured such that the dampening water 8 pulled up by the water base roller 10 is transferred to the pressure regulating roller 11 by the rotation of both rollers 10 and 11.

The pressure regulating roller 11 is generally designated by the reference numeral 12.
This is a dampening roller device that attaches the dampening water 8 on the plate surface, and has bearings 13 on the frames 1 and 2 on both sides.
14, the transfer roller 15 is driven by a gear device 16, and rotates in the direction indicated by arrow D in the figure in synchronization with the plate cylinder 3. Note that the water source roller 10 is configured to be able to adjust the contact pressure with respect to the pressure regulating roller 11, and the pressure regulating roller 11 with respect to the transfer roller 15, respectively. A lever 16 is attached to the inner protruding portion of the frames 1 and 2 of each bearing 13 and 14 that pivotally supports the transfer roller 15, and is rotatable with its movement in the axial direction being restricted by the collar 17 and the stepped portion of the bearings 13 and 14. The lever 16 has a downwardly protruding piece 18 that is fitted into a stopper 19 on the frame 1, 2 side.
The counterclockwise rotation in FIG. 1 is restricted by contacting with. The roller alarms designated by numerals 20 and 21 are three-pronged roller alarms, and are rotated by a pin 22 implanted on the free end side of the lever 16, which is prevented from coming off from the pin 22 by a collar 23. A piston rod 25 of an air cylinder 24 is mounted on one free end of the air cylinder to rotate it in forward and reverse directions.
The working end of is pivotally connected. Further, the other end of a spring shaft 26, one end of which is pivotally connected to the base end of the lever 16, is slidably inserted into the other free end of the roller arms 20, 21.
A compression coil spring 27 is interposed on the upper part of the roller arm 20, and is resiliently moved to separate the free ends of the roller arms 20, 21 and the base end of the lever 16 from each other. and,
When the piston rod 25 of the air cylinder 24 is contracted, the protruding piece 18 of the lever 16 moves to the stopper 19.
Until they come into contact with the stopper 19, the compression coil spring 27 is not compressed and the roller arms 20, 21 and the lever 16 rotate together, and after they come into contact with the stopper 19, only the roller arms 20, 21 rotate. Thus, the compression coil spring 27 is compressed. Furthermore, a deposition roller 28 is rotatably supported at the other free end of the roller arms 20, 21, and is brought into contact with the plate cylinder 3 and the transfer roller 15 in the direction shown by arrow E in the figure. At the same time, the plate cylinder 3
The transfer roller 15 is configured to be attached to and detached from the transfer roller 15 at different timings. The contact pressure of the forming roller 28 against the transfer roller 15 is adjusted by rotating an adjustment nut 29 screwed onto the spring shaft 26, and the contact pressure of the forming roller 28 against the plate cylinder 3 is as follows. Adjusted by the described adjustment mechanism.

That is, pressure regulating bolts 30 are screwed into the free ends of the levers 16 on both sides so that they can be adjusted forward and backward, and are fitted with lock nuts 3 that lock the rotation after adjustment.
1 are screwed together. On the other hand, frame 1 on the drive side
A stop pin 32 is installed in the frame 2 on the operating side, and the end of the pressure regulating bolt 30 comes into contact with the stop pin 32 to restrict the rotation of the lever 16 in the clockwise direction shown in the figure. A stop pin 33 that restricts rotation in the clockwise direction in the figure is rotatably supported.
, the axis F of the lever abutting portion 33a and the axis F1 of the frame shaft support 33b are eccentric as shown by the symbol t in the figure. On the other hand, the operation-side bearing 34 that pivotally supports the plate cylinder 3 has an axis F2 of an outer circumferential circle pivotally supported on the frame 2 and an axis F3 of an inner circumferential circle that pivotally supports the end shaft of the plate cylinder 3. It is eccentrically located as shown by the symbol t1 in the figure, and by rotating this bearing 34, the phase in the circumferential direction between the operating side and the driving side of the plate cylinder 3 is shifted, and the plate cylinder twist adjustment described above is performed. is configured to be performed. As shown in FIGS. 2 and 3, one end of a connecting rod 35 that can be freely expanded and contracted is pivotally connected to the bearing 34, and the other end of this connecting rod 35 is connected to the shaft of the stop pin 33. It is pivotally attached to the free end of a link 36 fixed to 33b with a split clamp. In other words, the plate cylinder 3 and the stop pin 33 are connected to the bearing 34, the connecting rod 35,
They are connected by a four-bar link consisting of a link 36. By doing this, by rotating the bearing 34 and performing twist adjustment, the axis of the plate cylinder 3 can be adjusted.
When F3 moves, the stop pin 33 connected by a four-bar link rotates, and due to its eccentric action, the axis F of the abutting portion 33a follows and moves, and the regulating position of the pressure regulating bolt 30 is adjusted by twisting. It is configured to move by minutes.

The dimensions of each part of this device are set as follows. First, the plate cylinder bearing 34 is determined from the plate cylinder twist amount.
The eccentricity t ₁ and rotation angle are determined, and the position of the plate cylinder 3 at each twist amount is determined by drawing and calculation, and the desired position of the forming roller 28 relative to this is determined. Then, the desired rotation angle change of the lever 16 corresponding to this is determined, and the amount of displacement of the lever 16 at the stop pin 33 position is determined, and then the eccentricity t of the stop pin 33 is determined, and the angle of the stop pin 33 is determined to correspond to the amount of rotation of the bearing 34. Finding the amount of change 4
Determine the length of each member of the knot link. By doing this, the formation roller 2 is adjusted for each amount of twist of the plate cylinder 3.
It is possible to design a follow-up device that is able to keep the contact pressure between the plate cylinder 3 and the plate cylinder 3 within the required value, which does not change approximately.

The operation of the water supply device 7 configured as above will be explained. First, prior to printing, the contact pressure between the rollers is adjusted while the rollers are brought into contact with each other as shown in FIG. The contact pressure of the metering roller 11 against the transfer roller 15 is adjusted by rotating a roller arm (not shown) that supports the metering roller 11, and the contact pressure of the water base roller 10 against the metering roller 11 is adjusted by rotating a roller arm (not shown) that supports the metering roller 11. is adjusted by rotating an eccentric bearing (not shown) of the water head roller 10. Further, by rotating the adjusting nut 29 back and forth, the roller arm 20 is rotated, and the contact pressure of the forming roller 28 with respect to the transfer roller 15 can be adjusted. In addition, by loosening the lock nut 31, rotating the pressure regulating bolt 30 back and forth, and tightening the lock nut 31, the rotation restriction position of the lever 16 by the stop pins 32 and 33 changes, and the contact pressure of the forming roller 28 against the plate cylinder 3 changes. is adjusted.

After adjusting in this way, when the piston rod 25 of the air cylinder 24 is retracted, the roller arm 20 and the lever 16 rotate together, the landing roller 28 is separated from the plate cylinder 3, and the piston rod 25 is further retracted. When the protruding piece 18 of the lever 16 comes into contact with the stopper 19, rotation of the lever 16 is restricted, so that the roller arm 20
The roller rotates while compressing the compression coil spring 26, and the forming roller 28 separates from the transfer roller 15. Then, when the air cylinder 24 is switched from manual to automatic and starts the machine, the ink forming roller 4 comes into contact with the plate cylinder 3 and ink supply starts, and at the same time, the piston rod 25 of the air cylinder 24 extends, and as mentioned above, The application roller 2 is
8 first comes into contact with the transfer roller 15 and then comes into contact with the plate cylinder 3. As a result, water supply started, and Mizifune 9
The dampening water inside is distributed between the water source roller 10 and the metering roller 1.
1, transferred to the transfer roller 15 and then to the landing roller 28 in this order and supplied to the printing plate.

In printing operations carried out in this manner, as mentioned above, the plate may be mounted on the plate cylinder 3 with the left and right phases shifted in the circumferential direction, so in this case, After adjusting the contact pressure, twist adjustment is performed by rotating the bearing 34 on the operating side of the plate cylinder 3. At this time, the axis of the plate cylinder 3
F3 moves slightly only on the operating side, but bearing 3
4 and the operating side stop pin 33 are connected by a four-bar link, the axis F of the contact portion 33a of the stop pin 33 moves, so that the lever 16 is moved via the pressure regulating bolt 30 that contacts this. It rotates slightly, and the operating side axis of the forming roller 28 is aligned with the plate cylinder 3.
Follow this and move by the same amount. Therefore, the contact pressure of the forming roller 28 against the plate cylinder 3 does not change before and after the twist adjustment.

As is clear from the above explanation, according to the present invention, a pair of left and right stop pins are provided on the frame side of the water supply roller device of a web rotary printing press, and the free end of the lever that rotates around the transfer roller is connected to the stop pins. By bringing the lever into contact with the stop pin, the contact pressure of the forming roller supported by the free end of the lever against the plate cylinder is regulated, and the lever abutting part of one of these stop pins and the frame shaft support are made eccentric. The frame is pivotally supported by a frame, and the frame shaft support and an eccentric bearing for twist adjustment of the plate cylinder are connected by a four-bar link, so that the axis of the forming roller is moved in accordance with the movement of the axis of the plate cylinder due to twist adjustment. By configuring this, the contact pressure between the forming roller and the plate cylinder can not only be adjusted accurately with a simple operation, but also the contact pressure between the forming roller and the plate cylinder before and after the adjustment, even when the plate cylinder is twisted. Since the contact pressure does not change, there is no need to re-adjust the contact pressure after the twist adjustment, and the non-operating time of the machine can be shortened and productivity can be greatly improved.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the water supply roller device according to the present invention, Figure 1 is a side view of the water supply device implementing this as seen from the inside of the drive side frame, and Figure 2 is the same. FIG. 3 is a side view of the operation side frame viewed from the outside, and a developed vertical sectional view of the water supply roller device. 1, 2... Frame, 8... Dampening water, 9... Water boat, 12... Water supply roller device, 15... Transfer roller, 16... Lever, 20... Roller arm,
28...Applying roller, 32, 33...Stop pin, 33a...Lever contact portion, 33b...Frame shaft support, 34...Bearing, 35...Connection rod,
36...link.

Claims (1)

[Scope of utility model registration request] A transfer roller that is pivotally supported on the machine frame side and transfers dampening water from the water source side, a lever that is rotatably supported on both shaft ends of this transfer roller, and a lever that is rotatably supported on the free end side of this lever. In the water supply roller device, the roller is configured to be supported on the transfer roller so as to be able to freely adjust its pressure, and is attached to and detached from the plate cylinder by rotation of the lever, and whose contact pressure with the plate cylinder is adjusted. A pair of left and right pins are provided to control the contact pressure of the forming roller by bringing the free ends of the pins into contact with each other, and one of the pins is attached to the frame by making the lever abutment part and the frame shaft support eccentric. A water-feeding roller device for a paper web rotary printing press, characterized in that it is rotatably supported, and its frame shaft support and eccentric bearing for twist adjustment of a plate cylinder are connected by a four-bar link.