JP2578123B2 - Impression cylinder cleaning equipment for sheet-fed printing presses - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an impression cylinder cleaning apparatus for a sheet-fed printing press.

(Prior Art) In the case of printing by a sheet-fed printing press, there are various sizes of paper used for printing, both large and small in 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 so that the ink is transferred from the blanket cylinder to the paper surface.

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

For this reason, when printing on a large paper after switching to a large paper after printing a small paper, it is necessary to clean the impression cylinder surface and remove the residual ink (including paper dust). There is.

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 paper is reversed during the transport from the first color to the second color, and the printing is performed on the back side of the paper with the second color. Apply. In this case, the undried ink on the surface printed with the first color directly contacts the impression cylinder surface of the second color. For this reason, the surface of the impression cylinder is stained with ink. As the stain progresses, the remaining ink on the impression cylinder surface is transferred to the paper surface, which causes printing trouble.

Due to such circumstances, printing is frequently interrupted, and the surface of the impression cylinder is cleaned. The time required to clean this impression cylinder is
It occupies a large weight in the printing interruption work.

Conventionally, however, there has not been developed an apparatus for automatically cleaning the same, and all of the impression cylinder wiping has been performed manually.

(Problems to be Solved by the Invention) The manual wiping method is a method in which a cleaning liquid is firstly soaked in a rag, and the cleaning liquid is brought into contact with a rotating impression cylinder surface to wipe off residual ink. There was a risk that the paper would get caught in the printing press.

SUMMARY OF THE INVENTION An object of the present invention is to provide an impression cylinder cleaning apparatus which can efficiently perform the cleaning of the impression cylinder without manual operation and has excellent maintainability.

(Means for Solving the Problems) For this reason, the present invention provides a feed roll in which a new cloth for wiping is wound in a roll shape, a winding roll for winding in a dirty inching operation after wiping, An impression cylinder cleaning device main body comprising a contact and release member for abutting or releasing the cloth to or from the impression cylinder between the rolls, and a claw escape means for preventing the cloth from interfering with the claws of the impression cylinder. And a cleaning liquid discharge pipe for impregnating the cloth before wiping with the cleaning liquid, wherein the main body is slidable on a rail extending through a hole formed in a portion corresponding to a lower portion of the impression cylinder of the frame, and It can be fixed at each predetermined position inside and outside the machine, and is used as a means for solving the problem.

(Operation) When the impression cylinder is rotating and in a non-printing state, the cloth is wound on a winding roll by an inching operation while being in contact with the surface of the impression cylinder. At this time, the cleaning liquid is discharged from the cleaning liquid discharge pipe toward the cloth on the feed roll side, and therefore, the dirt on the surface of the impression cylinder is wiped with the cloth wet with the cleaning liquid.

When the impression cylinder / claw approaches the cloth, the cloth is separated from the impression cylinder surface by the claw escape means. When the pawl passes through the cleaning device, the cloth returns to its original position again and wipes off the dirt on the impression cylinder surface.
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.

Next, the operation of the cloth replacement of the cleaning device body, repair, inspection and the like will be described.For example, when replacing the cloth with a new one, release the lock mechanism of the device body,
Pull the main unit out of the frame while sliding on the rails.

Here, the take-up roll and the feed roll are detached from the apparatus main body, a new feed roll-side cloth end is attached to an empty take-up roll, and each roll is set on the apparatus main body. After the setting is completed, the device body is pushed and slid on the rails, returned to the original working position and locked.

(Embodiments) The present invention will be described below with reference to embodiments in 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, wherein 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 under printing, and 7 is an impression cylinder cleaning device. The portions indicated by reference numerals 1 to 6 among these portions are the same as those of the conventional device.

2 and 3 are enlarged views showing an embodiment of the impression cylinder cleaning apparatus of the present invention. Reference numeral 8 denotes a cloth for wiping off dirt on the impression cylinder 3, and the cloth 8 is wound around a feed roll 9, One end thereof is fixed to the winding roll 10 with an adhesive or the like.

The shaft end of the take-up roll 10 is connected to a pneumatic rocking cylinder motor 12 via a clutch mechanism 11. The swinging motion of the air pressure swing motor 12 causes the cloth 8 to be wound while giving an inching movement. A rewinding load is applied to the wound cloth 8 by contact with the impression cylinder 3, but the cloth 8 is prevented from being reversed by the clutch mechanism 11.

The cloth 8 is pressed by the sponge rubber 13 and is brought into contact with the surface of the impression cylinder 3. This contact / separation movement secures the sponge rubber 13 and the brackets arranged in parallel with the two rolls 9 and 10.
14 through a pneumatic oscillating motor 1 provided at the shaft end.
4 '. Further, by controlling the air pressure of the air pressure oscillating motor 14 ', an optimal contact pressure for removing dirt on the surface of the impression cylinder 3 can be obtained.

On the other hand, in order to enhance the cleaning effect, a cleaning liquid discharge pipe 15 for impregnating the cloth 8 with the cleaning liquid is provided at a position close to the cloth 8 of the bracket 14 to the same length as the cloth width. On the side of the cleaning liquid discharge pipe 15 which is in contact with the cloth 8, a large number of liquid discharge holes are provided over the entire length of the pipe so that the liquid can be discharged intermittently from these holes.

Reference numeral 16 denotes a cam provided on one side of the portion where the claw device 5 of the impression cylinder 3 is located. A cam follower 17 comes into contact with the cam 16 via an arm extending from the bracket 14.

Next, the operation will be described. FIG. 4 shows that the impression cylinder 3 is rotating.
In the non-printing state, the cloth 8 is brought into contact with the surface of the impression cylinder 3 to wipe off dirt. In this state, the cleaning liquid is discharged from the cleaning liquid discharge pipe 15. The cloth wet with this liquid is wound around the winding roll 10 by an inching operation.

Next, when the pawl device 5 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 3, and the cam follower 17 is pushed, so that the bracket 14 rotates and the body bracket 14 The cloth 8 is separated from the surface of the impression cylinder 3 through the opening.
The detachment can prevent the cloth 8 and the sponge rubber 13 from being damaged by hitting the claw device 5. When the pawl device 5 passes, the cam follower 17 separates from the cam 16 and the cloth 8 again contacts the surface of the impression cylinder 3 to continue the operation of wiping off dirt.

Winding of the cloth 8 is also a means for enhancing the cleaning effect.
Since the dirty cloth was kept in contact with the impression cylinder 3, the impression cylinder 3
Dirt does not remove forever. Therefore, by always supplying a new cloth, the dirt on the impression cylinder 3 can be removed.

After the dirt on the surface of the impression cylinder is wiped with a wet cloth, the discharge of the cleaning liquid is interrupted, a dry cloth is continuously supplied, and the surface of the impression cylinder 3 is wiped (finished) to complete the impression cylinder cleaning.

A series of operations such as winding of the cloth 8, advancement of the cloth 8 to the work position and retreat to the standby position (the state shown in FIG. 1), discharge / stop of the cleaning liquid, and the like are performed by electric and pneumatic control. It has become. Further, in this embodiment, the direction of winding the cleaning cloth 8 is opposite to the direction of rotation of the impression cylinder 3, but it is also possible to adopt a method in which the direction is the same and a new cloth is rewound by a fixed amount.

However, such a cleaning device still has various problems in its installation position. For example, if this is provided above the impression cylinder 3, the maintenance of the impression cylinder cleaning device 7 itself is good, but this hinders the rubber (blanket) replacement work of the blanket cylinder 2. Therefore, when the apparatus 7 is to be installed below the impression cylinder 3, the section is sealed by a machine frame, so that no person can approach the apparatus and maintenance of the cleaning apparatus itself cannot be performed.

6 and 7 show the mounting position of the main body of the impression cylinder cleaning device 7 of the present invention and its structure. 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 portion is surrounded by the frames 18 and 19, if the cleaning device main body is fixed to the same portion, maintenance becomes impossible as described above. Therefore, a hole (window) 20 for allowing the main body of the impression cylinder cleaning device 7 to pass through the operation side frame 18 is opened.

A rail 21 is provided below the hole 20 between the operation-side frame 18 and the drive-side frame 19, and the rail 21 passes through the hole 20 of the operation-side frame 18 from the drive-side frame 19, and is fixed by overhanging. It is. The main body of the impression cylinder cleaning device 7 is positioned on a rail 21 by a guide 22 having an L-shaped cross section.

On the other hand, a handle 24 is provided on the end face of the cleaning device 7 on the operation side of the main body, and the main body can be slid on the rail 21 by operating the handle 24 by hand.

For example, the main body of the impression cylinder cleaning device 7 is pulled out to a position indicated by a dashed line in FIG. 7, and the cleaning cloth is replaced here.
When this is completed, push the handle 24 to return to the original installation position, but the position where the stopper 23 hits the drive side frame 19 is
This is the in-machine set position of the cleaning device body. After the cleaning device main body is set at this position, a position fixing device (not shown) having a lock member is provided between the rail 21 and the cleaning device main body in order to hold the position of the main body. Is done.

(Effects of the Invention) As described in detail above, according to the present invention, the time required for cleaning the impression cylinder can be greatly reduced as compared with the conventional hand wiping by using the apparatus for cleaning the impression cylinder. Since there is no need to bring your hand near the impression cylinder,
The danger of fingers getting caught in the press is gone,
In addition, there is no need for dirty work, and the working environment is further improved.

Further, in the present invention, in addition to the above-mentioned effects, the feature of the installation structure makes it easy to take out the main body of the impression cylinder cleaning device out of the machine for fabric replacement, maintenance, and the like, and to take out the work in a short time. In addition, there is an advantage that the setting of the cleaning device body at a predetermined position in the machine can be performed easily and in a short time.

[Brief description of the drawings]

FIG. 1 is a side view showing the arrangement of each part of a sheet-fed printing press to which the apparatus of the present invention is applied, and FIG.
FIG. 3 is an enlarged side view of a part of the apparatus, and FIGS. 4 and 5 are enlarged side views showing a state in which the cloth abuts on the impression cylinder surface and a state in which the cloth comes off. FIG. 6 is a side view showing a state in which the main body of the impression cylinder cleaning device of the present invention is attached to a printing press. FIG. 7 is a view showing a state in which the main body of the impression cylinder cleaning device is taken out of the printing press. It is a trunk | drum front view. Explanation of main parts in the drawing 3 ... impression cylinder 7 ... cleaning device 8 ... cloth 9 ... feeding roll 10 ... winding roll 14 ... bracket 16 ... cam 17 ... cam follower 18, 19 ... frame 20 … Hole 21… Rail

Claims (1)

(57) [Claims] 1. A feed roll in which a new cloth for wiping is wound in a roll form, a winding roll for winding by a dirty inching operation after wiping, and a cloth provided between said two rolls for contacting an impression cylinder or The cleaning liquid body is impregnated with the cleaning liquid before and after the cleaning of the impression cylinder cleaning device main body including the contact and detachment members for detaching from the impression cylinder and the claw escape means for preventing the cloth from interfering with the claws of the impression cylinder. The main body is slidable on a rail extending through a hole formed in a portion corresponding to a lower portion of the impression cylinder of the frame, and can be fixed at predetermined positions inside and outside the machine. An impression cylinder cleaning device for a sheet-fed printing press, comprising: