JPH0442130Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a bearer cleaning device for cleaning the circumferential surface of a disc-shaped bearer provided at both ends of a printing cylinder in a rotary printing press.

[Prior art]

In printing operations using rotary printing presses, as demands for print quality, particularly halftone reproducibility and density unevenness, have increased, it has become necessary to integrally form disks with a standard diameter called bearers at both ends of the printing cylinder and bring them into contact with each other. A method called bearer touch is used in which printing is performed while In this case, if printing is performed with ink, paper powder, spray powder for preventing set-off, etc. adhering to the circumferential surface of the bearer, or rust occurring,
Since the quality of printed matter deteriorates due to poor bearer touch or scratches on the peripheral surface of the bearer, it is necessary to always keep the surface of the bearer smooth to maintain high accuracy.

Conventionally, a cleaning device called a bearer wiper has been used in which a fiber such as felt impregnated with oil is brought into pressure contact with the peripheral surface of the bearer using a spring member. However, in conventional cleaning devices, since the felt is fixed with bolts and nuts, the bolts and nuts must be removed with tools when replacing them, which is not only troublesome and takes a long time, but also makes it difficult to remove the bolts and nuts. There was a risk of objects falling into the machine, and as a result, the operating rate of the machine was reduced. Additionally, due to the cumbersome nature of the work, there have been cases where maintenance has been neglected and print operations have continued with a defective bearer touch, resulting in printing failures or damage to the bearer, leading to major accidents. .

[Summary of the idea]

This idea was created in view of the above points.
A pair of plate-shaped bearer guards is arranged on the front side of the boundary between the main body of the printing cylinder and the bearer, guide pins are respectively fixed to the bearer guards via a plurality of brackets, and a wiper holder is attached to each guide pin so as to be able to move forward and backward. By configuring the bearer wiper, which is supported and removably held together with the storage case by this wiper holder, to be brought into pressure contact with the bearer circumferential surface of the trunk using a spring member equipped with a guide pin, the bearer wiper can be easily replaced and the bearer surface can be cleaned. The present invention provides a bearer cleaning device for a rotary printing press that is designed to prevent corrosion and damage. Embodiments of the present invention will be described in detail below with reference to the drawings.

〔Example〕

1 and 2 show an embodiment of the bearer cleaning device according to the present invention, FIG. 1 is a side view thereof, and FIG.
The figure is also a front view. In these figures,
On the left and right frames 1 of the printing press, a plate cylinder 2 with a printing plate attached to its circumferential surface and a blanket cylinder 3 with a blanket wrapped around its circumferential surface are rotatable with the plate surface and the blanket surface facing each other. A disc-shaped bearer 4 is integrally formed at both ends of both the trunks 2 and 3. This bearer 4 has a circumferential surface diameter that is the reference diameter of both cylinders 2 and 3, and is configured to maintain an appropriate printing pressure by rotating this circumferential surface while keeping these circumferential surfaces in contact with each other during printing. . Reference numeral 5 denotes a pair of bearer guards formed in a plate shape having arcuate edges that follow the circumferential surfaces of both end portions of both trunks 2 and 3.
Its plane is made parallel to the frame 1, and it is supported by the left and right frames 1 by a plurality of support pins 6.

That is, this bearer guard 5 connects the main body of the printing cylinder and the bearer 4, as shown in FIG.
The bearer 4 is located at the boundary between the trunk body and the bearer 4, as shown in FIG. The center portions of the left and right bearer guards 5 are connected by a safety bar 7, and are configured to prevent hands from being caught in the rotating bits of the bodies 2 and 3, which rotate in the directions shown by arrows in the figure. Each of the plate cylinder 2 and the blanket cylinder 3 is provided with a pair of left and right bearer cleaning devices 8 having the same configuration. This bearer cleaning device 8 includes a plate 9a welded to the flat surface of the bearer guard 5 close to the circumferential surface of the bearer 4, and a pair of guide pins 9b implanted in the plate 9a perpendicular to the circumferential surface of the bearer 4. It is equipped with an integrally formed bracket 9, and a wiper holder 1 is attached to the guide pin 9b.
0 is slidably supported. The wiper holder 10 is integrally formed with an L-shaped member having a boss that fits into both guide pins 9b and a box-shaped member welded to the L-shaped member and opening toward the bearer 4 side. From there, a bearer wiper 11 made of felt or the like is housed in a case 12, and is detachably inserted and held in the case 12. Reference numeral 13 denotes a compression coil spring installed on both guide pins 9b, interposed between the wiper holder 10 and a double nut 14 which is screwed into the tip threaded portion of the guide pin 9, and which is attached to both guide pins 9b in the perspective direction with respect to the circumferential surface of the bearer 4. A sliding force is applied to the wiper holder 10 sliding in the direction of pressing the bearer wiper 11 against the peripheral surface of the bearer 4. 15 is an oil injection hole.

In the printing cylinder device configured as above,
Bearer wiper 11 soaked in oil is placed in case 12.
When the case 12 is inserted into the box-shaped member of the wiper holder 10 and the printing operation is performed while it is pressed against the peripheral surface of the bearer 4 by the elastic force of the compression coil spring 13, the plate cylinder 2 is The image formed on the printing plate is transferred to the blanket surface of the blanket cylinder 3, and this is further transferred to the printing machine to perform printing, and the peripheral surface of the bearer 4 is also coated with the bearer wiper 11 pressed against the blanket surface. An oil film is then supplied. Therefore, the dirt around the bearer 4 is cleaned,
If foreign matter is attached, it will be wiped off.

When the bearer wiper 11 is used for a certain period and its wiping ability decreases, it is replaced with a new one. In this case, hold the wire bar holder 10 with one hand, resist the elastic force of the compression coil spring 13, and hold the bearer 4.
When the wiper holder 10 is slid away from the circumferential surface of the wiper holder, the box-shaped member of the wiper holder 10 and the circumferential surface of the bearer 4 are separated from each other. Take it out from 10. Then, replace the bearer wiper 11 with a new one, and reinstall the wiper holder 1.
0 to load a new bearer wiper 11 together with the case 12 into the box-shaped member of the wiper holder 10. By releasing the hand holding the wiper holder 10, the exchange of the bearer wiper 11 is completed.

On the other hand, when cleaning the plate surface or blanket surface after printing is completed, since the bearer guard 5 is located on the front side, which is the working side, the cleaning liquid containing ink may be splashed onto the bearer side or be washed with a wiping cloth. There is no possibility that dirty cleaning liquid or gum for plate protection will adhere to the bearer 4.

[Effect of idea]

As is clear from the above description, according to the present invention, since a pair of plate-shaped bearer guards are disposed on the front side of the boundary between the main body portion of the printing cylinder and the bearer,
There is no possibility that ink-containing cleaning fluid or plate protection gum will adhere to the bearer. Additionally, since the bearer guard is used to support multiple wiper holders that hold the bearer wiper so that they can move forward and backward, the bearer wiper can be replaced with a single touch without using any tools, which shortens replacement time and improves machine utilization. In addition, there is no risk of bolts, nuts, etc. falling into the machine as in the past, and it is possible to prevent damage to the machine and a decrease in productivity due to interruption of work. Also,
By making it easier to replace the bearer wiper, it is no longer necessary to replace the bearer wiper, and the bearer surface can always be kept clean and scratches can be prevented, thereby improving the quality of printed matter.

Furthermore, since multiple sets of bearer cleaning devices are supported by one bearer guard, the structure is simplified. Further, since the wiper pressure contact force against the bearer can be easily adjusted and a sufficient pressure contact force can be obtained, the bearer cleaning performance is improved.

[Brief explanation of the drawing]

1 and 2 show an embodiment of a bearer cleaning device for a rotary printing press according to the present invention, with FIG. 1 being a side view and FIG. 2 being a front view thereof. 1...Frame, 2...Print cylinder, 3...Rubber cylinder,
4... Bearer, 5... Bearer guard, 8... Bearer cleaning device, 9... Bracket, 9b... Guide pin, 10... Wiper holder, 11... Bearer wiper, 12... Case, 13... Compression coil spring.

Claims (1)

[Scope of utility model registration request] A pair of plate-shaped bearer guards located on the front side of the boundary between the main body portions of the printing cylinders 2 and 3 and the bearer 4, supported by the frame 1 parallel to the frame 1, and formed in an arc shape so that the end edge follows the cylinder circumferential surface. 5, a plurality of brackets 9 having guide pins 9b fixed to the bearer guard 5 and parallel to the surface of the bearer guard; A supported wiper holder 10, a bearer wiper 11 detachably held in these wiper holders 10 together with a storage case 12, and a spring member 13 attached to the guide pin 9b and pressing the bearer wiper 11 against the circumferential surface of the bearer 4. A bearer cleaning device for a rotary printing press.