JPH081868Y2 - Impressor cleaning device for sheet-fed printing press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an impression cylinder cleaning device for a sheet-fed printing press.

(Prior Art) In the case of printing by a sheet-fed printing press, there are various paper sizes used for printing, from large to small in both length and width, and this is applied to one printing press.

Printing is performed by pressing the paper between the impression cylinder and the blanket cylinder to transfer the ink from the blanket cylinder to the paper surface.

Here, when printing on paper smaller than the surface area of the impression cylinder,
The surface of the impression cylinder protruding from the surface of the paper comes into direct contact with the blanket cylinder, and residual ink adheres thereto. The residual ink that has adhered to and accumulated on the surface of the impression cylinder is reversely adhered to the back surface (the surface in contact with the impression cylinder) of the large paper next time, and stains the paper surface.

Therefore, when the small size paper is printed and then the large size paper is printed by switching the paper size, the surface of the impression cylinder must be wiped to remove the residual ink (including paper dust and the like). There is a need.

In the case of a printing machine having a reversing function, for example, the front side of the paper is printed by the first color printing unit, and then the first color
The paper is turned upside down while being conveyed to the second color, and printing is performed on the back surface of the second color. In this case, the undried ink on the front surface printed in the first color directly contacts the surface of the impression cylinder in the second color.
For this reason, the surface of the impression cylinder is stained with ink. When this stain progresses, the residual ink on the surface of the impression cylinder is transferred to the surface of the paper, which becomes a printing problem.

Due to such circumstances, printing is frequently interrupted and the surface of the impression cylinder is wiped. The time required to wipe the impression cylinder is one of the most important factors in the work of interrupting printing.

However, it is the current situation that a device for automatically cleaning this has not been developed, and the impression cylinder wiping currently all depends on manpower.

(Problems to be solved by the invention) The manual wiping method is to let the waste cloth soak the cleaning liquid,
The residual ink is wiped off by bringing this into contact with the surface of a rotating impression cylinder, and there is a risk that hands and fingers will be caught in the printing machine.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an impression cylinder cleaning apparatus that can efficiently perform the cleaning of the impression cylinder without requiring manual labor and is excellent in maintainability.

(Means for Solving the Problems) For this reason, the present invention relates to a feed roll in which a new cloth for wiping is wound in a roll shape, a winding roll for winding the soiled cloth after wiping by an inching operation, and Engages with a cam attached to the impression cylinder side to prevent the cloth from interfering with the abutment / removal material for abutting or separating the cloth from the impression cylinder between both rolls and the claw of the impression cylinder. Disposing the cleaning liquid on the main body, which is composed of a cloth follower cam follower and which is arranged in the lower part of the impression cylinder where the printing paper does not pass, and on the surface of the impression cylinder provided upstream of the main body in the direction of rotation of the impression cylinder. Consisting of a pipe,
The above problem is solved by the main body being slidable on a rail extending through a hole formed in a portion corresponding to the lower part of the impression cylinder of the frame and being fixed at predetermined positions inside and outside the machine. It is a means to do.

(Operation) First, the operation of cleaning the surface of the impression cylinder by the apparatus body of the present invention will be described.

When the impression cylinder is rotating and in a non-printing state, the cleaning liquid is discharged for several seconds at a timing avoiding the cutout portion of the impression cylinder. Then, the cleaning liquid adheres to the surface of the impression cylinder. At the same timing, the cloth provided under the impression cylinder is brought into contact with the surface of the impression cylinder. The residual ink on the surface of the impression cylinder is dissolved by the cleaning liquid, and the dissolved ink impregnates the cloth. This cleans the surface of the impression cylinder.

When the impression cylinder / claw approaches the cloth, the cam operates, and the member that brings the cloth into contact with the impression cylinder surface is moved via the cam follower to separate the cloth from the impression cylinder surface. When the claw passes the cleaning device section, the contact member returns to the original position again and wipes the dirt on the surface of the impression cylinder. When the surface of the impression cylinder is wiped off, the discharge of the cleaning liquid from the cleaning liquid discharge pipe is stopped, and then the surface of the impression cylinder is wiped with a dry cloth.

A series of operations such as winding the cloth, advancing the cloth to the working position and retracting it to the standby position, and discharging and stopping the cleaning liquid are performed by electric and pneumatic control.

Next, the operation of cloth replacement, repair, inspection, etc. of the cleaning apparatus main body will be described. For example, when trying to replace the cloth with a new one, the lock mechanism of the apparatus main body is released and the apparatus main body is replaced. Slide it out of the frame while sliding on the rails.

Here, the take-up roll and the feed roll are removed from the apparatus main body, a new cloth end on the feed roll side is attached to an empty take-up roll, and each roll is set in the apparatus main body. After finishing the setting, push the main body of the device to slide it on the rail, return it to its original working position and lock it.

(Example) Hereinafter, a typical example of the present invention will be described with reference to the drawings.

FIG. 1 shows the arrangement of each part of a sheet-fed printing press to which the impression cylinder cleaning device of the present invention is applied. In the figure, 1 is a plate cylinder, 2 is a blanket cylinder, 3 is an impression cylinder, 4 is a transfer cylinder, 5 is a claw device, 6 is a sheet of paper being printed, 7 is an impression cylinder cleaning device main body, and 15 is a cleaning liquid discharge pipe. Of these parts, the parts indicated by reference numerals 1 to 6 are the same as the conventional parts.

 FIG. 2 is an enlarged view of the cleaning liquid discharge pipe.

3 and 4 are enlarged views showing an embodiment of the impression cylinder cleaning device of the present invention. In both figures, 8 is a cloth for wiping off the dirt of the impression cylinder, this cloth is wound around the feed roll 9, and one end thereof is fixed to the winding roll 10 with an adhesive or the like. Further, the shaft end of the winding roll 10 is connected to a pneumatic swing motor 12 via a clutch mechanism 11. The oscillating motion of the pneumatic oscillating motor 12 causes the cloth 8 to be wound while giving an inching motion. Further, although a rewinding load is applied to the wound cloth 8 by contact with the impression cylinder 3, the clutch mechanism 11 prevents the cloth 8 from being reversed. The cloth 8 is pushed by the sponge rubber 13 and abuts on the surface of the impression cylinder 3. This abutting / releasing movement is performed by a pneumatic rocking motor 14 'provided at the shaft end of the roller 14 via a bracket 14 fixedly provided with a sponge rubber 13 and arranged in parallel with both rolls 9 and 10. It is like this. Further, by controlling the air pressure of the air pressure swing motor 14 ', an optimum contact pressure for removing dirt on the surface of the pressure drum can be obtained.

In order to enhance the cleaning effect, a cleaning liquid discharge pipe 15 for spraying the cleaning liquid to the surface of the impression cylinder is provided at the upper position of the impression cylinder. This is set to have almost the same length as the surface of the impression cylinder. 1 and 2, a large number of liquid discharge holes 25 are provided on the side of the liquid discharge pipe 15 facing the impression cylinder surface over the entire length of the pipe so that the liquid can be intermittently sprayed from the holes 25. It has become.

In FIG. 5, 16 is a part of the impression cylinder 3 where the claw device 5 is located.
It is a cam provided on the side surface, and a cam follower 17 comes into contact with and separates from the cam 16 via an arm extended from the bracket 14.

FIG. 5 shows a state in which the cloth is brought into contact with the surface of the impression cylinder to wipe dirt when the impression cylinder 3 is rotating and in a non-printing state. In this state, the cleaning liquid is intermittently sprayed from the cleaning liquid discharge pipe. The cloth is wound on the take-up roll 10 by an inching operation. When the claw of the impression cylinder 3 approaches the cloth 8, the cam follower 17 comes into contact with the cam 16 provided on the side surface of the impression cylinder, the cam follower 17 is pushed and the bracket 14 rotates, and the bracket 14 moves.
The cloth 8 is detached from the surface of the impression cylinder through the pad as shown in FIG. This separation prevents the cloth 8 and the sponge rubber 13 from hitting the nail and being damaged. When the pawl passes, the cam follower 17 separates from the cam 16, and the cloth 8 comes into contact with the surface of the impression cylinder again to continue the work of wiping off the dirt.

Winding of the cloth 8 is also a means for enhancing the cleaning effect.
If the dirty cloth 8 is kept in contact with the impression cylinder 3, the dirt on the impression cylinder 3 will not be removed forever. By constantly supplying new cloth 8, the dirt on the impression cylinder 3 can be removed.

After the dirt on the surface of the impression cylinder is wiped with the cloth 8, the discharge of the cleaning liquid is interrupted, a dry cloth is continuously supplied, and the surface of the impression cylinder is finished (empty) and wiped to complete the impression cylinder cleaning.

A series of operations such as winding of the cloth 8, advancing the cloth 8 to the working position and retracting to the standby position (state of FIG. 1), discharging / stopping the cleaning liquid, etc. are performed by electric and pneumatic control. There is.

Although the winding direction of the cleaning cloth is opposite to the rotating direction of the impression cylinder in the present embodiment, a method may be adopted in which this is the same direction and a new cloth is rewound quantitatively.

By the way, such a cleaning device also has various problems in its installation position. For example, if this is provided on the upper part of the impression cylinder, the cleaning device itself has good maintainability, but this hinders the work of exchanging the rubber (blanket) of the blanket cylinder. Therefore, if the apparatus is to be installed at the lower part of the impression cylinder 3, since the same section has a sealed structure by a mechanical frame, a person cannot approach it and the cleaning apparatus itself cannot be maintained.

7 and 8 show the mounting position and structure of the main body of the impression cylinder cleaning device of the present invention. As is clear from both figures, the main body of the impression cylinder cleaning device 7 is installed below the impression cylinder 3. However, since the same part is surrounded by the frames 18 and 19, if the main body of the cleaning device is fixed to the same part,
As described above, maintenance becomes impossible. Therefore, the operating frame 18 has a hole (window) 20 through which the main body of the cleaning device can pass.
Open up.

Below the hole 20, a rail 21 is installed between the operation side frame 18 and the drive side frame 19, and the rail 21 penetrates the hole 20 of the operation side frame 18 from the drive side frame 19 and is fixed by overhanging. is there. The main body of the cleaning device 7 is positioned on the rail 21 by a guide 22 having an L-shaped cross section.

On the other hand, a handle 24 is provided on the end surface of the main body operation side of the cleaning device 7, and the main body is slid on the rail by manually operating the handle 24.

For example, the main body of the cleaning device 7 is pulled out to the position indicated by the alternate long and short dash line, and the cleaning cloth is replaced here. When this is finished, push the handle 24 back to the original installation position. Stopper 23
The position where is hit the drive side frame is the in-machine setting position of the cleaning device body. After setting the main body of the cleaning device to this position, a position fixing tool (not shown) having a lock member is provided between the rail and the main body of the cleaning device to hold the position of the main body, and both the main operation and the automatic operation are performed. Rock monkey.

(Effects of the Invention) As described above in detail, according to the present invention, by cleaning the impression cylinder as a device, the time required to clean the impression cylinder can be greatly shortened as compared with hand wiping. Since it is no longer necessary to bring a hand near the impression cylinder, the risk of hands and fingers being caught in the printing machine during the impression cylinder cleaning is eliminated, and the dirt work is eliminated, thus improving the working environment. or,
Since the main body of the cleaning device is installed in the lower part of the impression cylinder, exchanging the rubber (blanket) of the blanket cylinder, greasing the claw bearing of the impression cylinder, adjusting the claw pressure, and removing dirt that cannot be removed by the cleaning device It does not hinder manual work, etc. Moreover, since the main body is provided in the part where the printing paper does not pass, the bottom of the printing paper conveyed by the impression cylinder is floated by the air flow during the printing work. Also, there is no worry of the printed paper getting dirty because it does not touch the main body.

Further, in addition to the above effects, the present invention makes it easy to take out the main body of the cleaning device from the machine for cloth replacement, maintenance, etc. due to the feature of the installation structure, and the removal work can be performed in a short time. In addition, the main body of the cleaning device can be set in a predetermined position in the machine easily and in a short time.

[Brief description of drawings]

FIG. 1 is a side view showing the arrangement of each part of a sheet-fed printing press to which the device of the present invention is applied, FIG. 2 is an enlarged view of a cleaning liquid discharge pipe, and FIG. 3 is an enlarged front view of an embodiment of the device of the present invention. FIG. 4 is an enlarged side view of a part of the apparatus, FIGS. 5 and 6 are enlarged side views showing states when the cloth contacts the impression cylinder surface and when the cloth comes off, and FIG. 7 shows the book. FIG. 8 is a side view showing a state where the main body of the impression cylinder cleaning device of the present invention is attached to the printing machine, and FIG. 8 is a front view of the impression cylinder part of the printing machine. Description of the main parts of the figure 3 ... impression cylinder, 7 ... cleaning device body, 8 ... cloth, 9 ... feed roll, 10 ... take-up roll, 14 ... bracket, 15
…… Cleaning liquid discharge pipe, 16 …… Cam, 17 …… Cam follower,
18 …… frame, 20 …… hole, 21 …… rail

Claims (1)

[Scope of utility model registration request] 1. A feed roll in which a new cloth for wiping is wound in a roll shape, a winding roll for winding the soiled cloth after wiping by an inching operation, and a cloth placed between the both rolls and applied to an impression cylinder. It is composed of an abutment / separation member for contacting or separating from the impression cylinder, and a cam follower for cloth removal that engages with a cam attached to the impression cylinder side to prevent the cloth from interfering with the claws of the impression cylinder. The main body is arranged in a lower part of the cylinder where the printing paper does not pass, and a cleaning liquid discharge pipe for spraying the cleaning liquid to the surface of the impression cylinder provided upstream of the main body in the direction of rotation of the impression cylinder. The impression cylinder of a sheet-fed printing press, which is slidable on a rail extending through a hole formed in a portion corresponding to the lower part of the impression cylinder and fixed at each predetermined position inside and outside the machine. Cleaning device.