JPH0464511B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to an impression cylinder cleaning device for cleaning the outer circumferential surface of an impression cylinder provided in an offset printing machine, and in particular, to a The present invention relates to an impression cylinder cleaning device for an offset printing machine suitable for cleaning while avoiding parts of the printing press.

[Conventional technology]

In the offset printing press, as shown in FIG. 9, a recess 53a is formed along the axial direction on the outer peripheral surface of the impression cylinder 53.
A plurality of grippers 58 are arranged at a. A portion of the gripper 58 protrudes from the outer circumferential surface of the impression cylinder 53, and the gripper 58 grips the printing paper 56 one by one.
They are grabbed and transported one by one.

10 and 11 show a conventional blanket body cleaning device 59, in which:
A cloth supply roll 61 and a cloth winding roll 62 are rotatably supported parallel to the axis of the blanket cylinder 52, respectively, by a pair of side plates 60A and 60B attached to frames on both sides of the printing press body. Both ends of a belt-shaped cleaning cloth 63 are wound around these rolls 61 and 62, and a predetermined tension is applied thereto. The cloth take-up roll 62 is intermittently rotated at a predetermined speed by a drive mechanism (not shown). A stay 65 having a T-shaped cross section is provided between the rolls 61 and 62 in parallel to the axes of these rollers, and both ends are fixed to side plates 60A and 60B. A pressure pad mounting base 75 in a portion of the stay 65 facing the blanket body 52 is hollow, and a pressure pad 66 made of an elastic member and serving as a means for pressing the cleaning cloth 63 is airtightly mounted on this opposing surface. A pressure chamber 68 formed by the tip of the stay 65 and the pressure pad 66 is connected to an external compressor (not shown), and when air is supplied to this pressure chamber 68, the pressure pad 66 expands. As a result, the cleaning cloth 63 that slides on the outer surface of the pressure pad 66 is pressed against the blanket cylinder 52. During this time, the surface of the blanket 52a wound around the outer peripheral surface of the blanket body 52 is cleaned.

Note that in FIGS. 10 and 11, 71 is a recessed portion for wrapping the blanket 52a;
2 is a cloth supply roller shaft, 73 is a cloth take-up roller shaft,
75 is a pressure pad mounting base.

[Problems to be Solved by the Invention] In the conventional cylinder cleaning device 59 described above, the cleaning cloth 63 is in standby at a distance from the outer peripheral surface of the blanket cylinder 52 when not cleaning, and is pressed against the blanket cylinder 52 in response to a signal to start cleaning. . This pressure contact state is
This is maintained for a sufficient number of revolutions to ensure that the blanket body 52 is wiped clean.

Incidentally, a gripper 58 protrudes from the outer circumferential surface of the impression cylinder 53, which is different from the conventional cylinder cleaning device 59 described above.
In this case, the cleaning cloth 63 pressed against the impression cylinder 53 and the gripper 58 collide with each other every rotation of the impression cylinder 53, and the cleaning cloth 63
3. The cylinder cleaning device 59 could not be used because the pressure pad 66, gripper 58, etc. were damaged. Therefore, when wiping and cleaning the impression cylinder 53, the printing machine is stopped each time, a cloth or the like is soaked in cleaning oil, and the cleaning is done manually. Cleaning a cylinder having such a protruding portion on its outer circumferential surface is done manually, which poses a problem in that it requires a lot of labor and time.

An object of the present invention is to provide an impression cylinder of an offset printing machine in which a cleaning part is temporarily detached from the impression cylinder in order to avoid the gripper protruding from the outer peripheral surface of the impression cylinder, in accordance with the position of the recessed part in which the gripper of the impression cylinder is attached. The purpose of the present invention is to provide a cleaning device.

[Means to solve the problem]

In order to achieve such an object, the present invention provides means for pressing a cleaning part into or out of contact with the outer circumferential surface of an impression cylinder having a recessed part in which a plurality of claws for gripping sheets of paper are attached, In an impression cylinder cleaning device for an offset printing machine, which performs cleaning by the relative movement between the roller and the rotating impression cylinder, an air cylinder is used as a means for pressing or separating the roller, and the roller directly engages with the recessed part of the impression cylinder. a rod that rotatably supports the roller at its tip; and an air valve that is connected to the rod and has a biasing means that presses the roller against the outer peripheral surface of the impression cylinder, and that controls the operating direction of the air cylinder in conjunction with the rod. The washing unit is provided with a control mechanism, and is configured to cause the cleaning unit, which is in pressure contact with the impression cylinder, to be separated from the impression cylinder at the position of the recessed part by the operation of the control mechanism.

[Effect]

According to the present invention, when the roller at the tip of the rod of the control device comes into contact with or separates from the recess of the impression cylinder during cleaning, the air supply to the air cylinder is switched, and the roller reaches the recess just before the cleaning part comes into contact with the recess. The cleaning portion is separated from the outer circumferential surface of the impression cylinder, thereby preventing the cleaning portion from coming into contact with the claw portion provided in the recess. A cleaning section is pressed against the outer circumferential surface of the impression cylinder other than the recessed portion to clean it.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 1A relates to a first embodiment of the present invention, and in this figure, parts that are the same or equivalent to those of the conventional example shown in FIGS. 9 to 11 will be described with the same reference numerals.

A recessed portion 53a is formed in a part of the outer peripheral surface of the impression cylinder 53 in parallel to the axial direction.
A plurality of grippers 58 are mounted on the gripper 3a with both ends fixed to the gripper shaft 2 supported by the impression cylinder 53 by bearings (not shown). And this Gritspa 5
The tip end 58a of the impression cylinder 53 protrudes from the outer peripheral surface of the impression cylinder 53, and is adapted to grip a sheet of printing paper 56 shown in FIG. 9 between it and the outer peripheral surface.

On the other hand, a main cylinder 10 is fixed to each main body frame on both sides of the printing machine (not shown).
At the tip of the rod of each main cylinder 10,
A side plate 12 is fixed. In addition, a side plate 1 is attached to the main body frame of the printing press (not shown).
A guide 13 is provided to guide the sliding movement of the side plate 12, and the side plate 12 moves forward or backward with respect to the impression cylinder 53 along the guide 13 by the operation of the main cylinder 10. An air cylinder 3 is fixed to the side plate 12, and a cleaning section 1 is fixed to the tip of the rod 4 of the air cylinder 3. The cleaning section 1 is guided on the guide surface 12a of the side plate 12. By operating the air cylinder 3, the impression cylinder 53 can move forward or backward toward the center.

Further, an air valve 5 is fixed to one end of the cleaning section 1. This air valve 5 has
A rod 6 is installed to switch the ports, and this rod 6 is connected to the air valve 5 by a spring (not shown) built into the air valve 5.
, that is, toward the center of the impression cylinder 53 . Further, a roller 7 is rotatably provided at the tip of the rod 6. and cleaning section 1
When the main air cylinder 10 moves forward toward the impression cylinder 53, the roller 7 comes into contact with the outer circumferential surface of the impression cylinder 53, and when the main air cylinder 10 moves the cleaning section 1 further, the rod 6 moves against the spring. It retreats against the urging force of , the port switches,
Air cylinder 3 is now in operation.

Next, the operation of the first embodiment will be explained.

During normal printing, as shown in FIGS. 1A and 1B, the cleaning section 1, that is, the cleaning cloth 63 is
The rod 6 of the air valve 5, which is separated from the air valve 3 and forms a control device, protrudes from the air valve 5 by the biasing force of a spring (not shown) built into the air valve 5. In this state, the first
As shown in Figure B, the port of the air valve 5 forms an air path in the direction in which the piston 3a of the air cylinder 3 moves backward. A printing paper 56 is held between the impression cylinder 53 and the blanket cylinder 52 shown in FIG. 9, and printing is performed by rotating the impression cylinder 53 in the direction of arrow C. At this time, the cleaning section 1 and roller 7 are separated from the impression cylinder 53, so there is no problem with printing. The control device controls the operating direction of the air cylinder 3 in conjunction with an engagement means consisting of a rod 6 that opens and closes the air valve 5 and a roller 7 rotatably provided at the tip of the rod 6. It is equipped with an air valve 5.

From the non-cleaned state shown in Figures 1A to 2B, the third
To achieve the cleaning state shown in FIGS. A to 4B, first, the main air cylinder 10 is operated to slide the side plate 12 along the guide 13 in the direction of arrow E. That is, when the cleaning unit 1 fixed to the side plate 12 via the air cylinder 3 is moved forward in the direction of arrow A, the air valve 5 fixed to the cleaning unit 1 moves forward.
The roller 7 at the tip of the rod 6 contacts the outer peripheral surface of the impression cylinder 53 as shown in FIG. 2A. When the cleaning section 1 is further advanced by the main air cylinder 10, the rod 6 moves back against a spring (not shown) built into the air valve 5 and stops in the state shown in FIG. 3A. At this time, the port of air valve 5 is
The state is switched to the state shown in Fig. B, and the air cylinder 3 is urged in the direction of arrow B, and the pressure pad 66 provided in the cleaning section 1 is elastically pressed against the outer peripheral surface of the impression cylinder 53. The cleaning cloth 63 moves on the outer surface of the impression cylinder 5.
3 is cleaned while rotating in the direction of arrow C.

During the above cleaning state, FIGS. 4A and 4B
As shown in the figure, when the impression cylinder 53 rotates in the direction of arrow C and the roller 7 provided at the tip of the rod 6 of the air valve 5 enters the recessed part 53a of the impression cylinder 53,
The rod 6 protrudes toward the center of the impression cylinder 53 due to the biasing force of the spring. As a result, the air path is switched by the action of the air valve 5, the piston 3a of the air cylinder 3 retreats, and the cleaning section 1 is separated from the outer peripheral surface of the impression cylinder 53 via the air cylinder shaft 4, resulting in the state shown in FIG. 4B. Become. Therefore, the impression cylinder 5
3 further rotates in the direction of arrow C and the gripper 58 in the recess 53a of the impression cylinder 53 approaches the cleaning section 1, the tip 58a of the gripper 58 protruding from the outer peripheral surface of the impression cylinder 53 does not clean. It does not come into contact with the cloth 63.

Furthermore, the impression cylinder 53 rotates in the direction of arrow C, and the fifth A
As shown in FIG. 5B, when the roller 7 provided at the tip of the rod 6 of the air valve 5 rides on the outer circumferential surface of the impression cylinder 53 again from the recess 53a, the rod 6 is pushed into the air valve 5 again. As a result, as in the case shown in FIG. 3A, the pressure pad 66 of the cleaning section 1 is pressed against the outer peripheral surface of the impression cylinder 53, and cleaning with the cleaning cloth 63 is performed.

According to this embodiment, the cleaning cloth 63 does not come into contact with the tip 58a of the gripper portion 58 protruding from the outer peripheral surface of the impression cylinder 53 during cleaning, so cleaning is automatically performed while rotating the impression cylinder 53. This greatly improves cleaning efficiency.

Other different embodiments are shown in FIG. 6, FIG. 7, and FIG. 8, respectively. In these figures, the first A
The same or equivalent parts as in the first embodiment shown in FIGS. In the second embodiment shown in FIG. 6, an intermediate portion of a lever 11 is rotatably connected to the tip of a rod 6 of an air valve 5 via a pin 10, and an impression cylinder 53 is connected to one end of this lever 11.
A roller 7 is provided so as to be able to come into contact with the outer circumferential surface of the printer, the other end is connected to a frame (not shown) of the printing press main body by a spring 12, and one end to which this spring 12 is connected is further connected to the pin 10. In this embodiment, a control device is constituted by an engagement means in which a fulcrum 13 for rotatably supporting a lever 11 is provided on the frame, and an air valve. The operation and effect of this embodiment are similar to those of the first embodiment, but since the roller 7 follows the rotation direction of the impression cylinder 53 in the same direction as indicated by the arrow C, the operation becomes smooth.

In the third embodiment shown in FIG. 7, impression cylinder magnets 14 having mutually different polarities in the radial direction of the impression cylinder 53 are installed on the inner surfaces of both rotational ends of the recessed portion 53a of the impression cylinder 53.
A fixed magnet 16 and a movable magnet 17 having the same polarity in the axial direction of the rod 6 are fixed at the tip and middle of the rod 6 of the air valve 5, and further between these magnets 16 and 17 and between the magnet 17. A control device is constituted by the air valve and an engaging means provided with fixed magnets 18 and 19 respectively fixed to the side plate 12 of the printing press between the air valve 5 and the air valve. These magnets 18 and 19 also have polarity in the same direction as the magnets 16 and 17. In this embodiment, the impression cylinder 53 rotates in the direction of arrow C, and when the impression cylinder magnet 15 attached to the recessed portion 53a approaches the fixed magnet 16 provided at the tip of the rod 6 of the air valve 5, it is attracted.
The movable magnet 17 is attracted to the fixed magnet 18. When the impression cylinder 53 further rotates in the direction of arrow C and the impression cylinder magnet 14 approaches the fixed magnet 16, it is repulsed and the movable magnet 17 is attracted to the fixed magnet 19. At this time, the magnetic force between the impression cylinder magnets 14, 15 and the fixed magnet 16 is the same as that between the fixed magnets 18, 19 and the movable magnet 17.
Make it larger than the magnetic force between. This embodiment also provides the same effects as those of the first embodiment described above.

In the fourth embodiment shown in FIG. 8, a T-shaped high-pressure air introduction pipe 20 is fixed between an impression cylinder 53 and an air valve 5, and both ends 20b in a direction perpendicular to the introduction part 20a,
Impression cylinder 53 with one end of 20c as exhaust end 20b
An engagement means having an opening fixed in close proximity to the outer peripheral surface of the air valve 5 and the other end 20c connected to the inside of the air valve 5.
The control equipment consists of: In this embodiment, when the exhaust end 20b is close to the outer peripheral surface of the impression cylinder 53, the amount of air escaping is small, the air pressure inside the air valve 5 increases, the impression cylinder 53 rotates in the direction of arrow C, and the exhaust end When the pressure cylinder 20b comes to a position facing the depression 53a of the impression cylinder 53, the amount of air escaping increases and the air pressure inside the air valve 5 decreases. The air valve 5 is actuated by the rise and fall of the air pressure within the air valve 5. In this example, the first
The same effects as in the embodiment can be obtained.

Incidentally, in the above embodiment, a case has been described in which the cleaning section 1 is moved forward and backward by the air cylinder 3, but high-pressure air is introduced into or discharged from the flexible pad 66 by another air supply/expulsion means. The cleaning section 1 may be brought into contact with or separated from the outer peripheral surface of the impression cylinder 53. Further, the cleaning section 1 may be of a brush type or a rotating roll and moved forward and backward by the air cylinder 3.

〔Effect of the invention〕

As described above, according to the present invention, by providing a control device equipped with a rod in the impression cylinder cleaning device of an offset printing machine, the rod reliably and directly detaches the cleaning portion that has come into contact with the recessed portion. During cleaning, the cleaning section does not come into contact with the protruding portion of the impression cylinder, and cleaning is performed automatically while rotating the impression cylinder, greatly improving cleaning efficiency. Furthermore, since the mechanism of the control equipment is simple and compact, it can be easily installed even in narrow spaces.

[Brief explanation of the drawing]

A in FIGS. 1 to 5 is a side view showing the relationship between the impression cylinder and the cleaning section during cleaning or non-cleaning in the first embodiment of the present invention, and B in FIGS. An explanatory diagram showing an air circuit, FIGS. 6, 7, and 8 are schematic side views of main parts showing second, third, and fourth embodiments of the present invention, and FIG. 9 is a schematic configuration of an offset printing machine. 10 is a perspective view of a conventional blanket barrel cleaning device, and FIG. 11 is a sectional view of FIG. 10. 1... Cleaning section, 3... Air cylinder, 5... Air valve, 6... Rod, 7... Roller, 14 to 19... Magnet, 20... High pressure air introduction pipe, 20b, 20c... Exhaust end, 53...impression cylinder,
53a... recessed portion, 56... printing paper (sheet), 58... gripper (claw portion), 63... cleaning cloth.

Claims (1)

[Scope of Claims] 1. Means for pressing the cleaning part into or out of contact with the outer circumferential surface of the impression cylinder having a recessed part in which a plurality of claw parts for gripping sheets of paper are attached, and the cleaning part brought into pressure contact with the outer peripheral surface of the impression cylinder. In an impression cylinder cleaning device for an offset printing machine that performs cleaning by relative movement with the rotating impression cylinder, the means for pressing or separating is formed by an air cylinder and directly engages with the recessed part of the impression cylinder. A roller, a rod rotatably supporting the roller at its tip, and a biasing means connected to the rod to press the roller against the outer peripheral surface of the impression cylinder, and actuating the air cylinder in conjunction with the rod. It is characterized by comprising a control mechanism consisting of an air valve that controls the direction, and by actuation of the control mechanism, the cleaning part, which is in pressure contact with the impression cylinder, is separated from the impression cylinder at the position of the recessed part. Offset printing machine impression cylinder cleaning device. 2. Means is provided for pressing a cleaning surface into or out of contact with the outer peripheral surface of an impression cylinder having a recessed part in which a plurality of claws for gripping sheets are attached, and the cleaning part brought into pressure contact and the rotating impression cylinder are provided. In an offset printing press impression cylinder cleaning device that performs cleaning by the relative movement of the impression cylinders, the means for pressing or separating them is formed by an air cylinder, and the recessed portions of the impression cylinders are mutually disposed within respective end faces in the rotational direction. A rod in which a pair of first magnets having opposite polarities is attached, and a pair of second magnets that attract or repel one of the first magnets are fixed at the tip and in the middle; It is characterized by comprising a control mechanism consisting of an air valve that interlocks to control the operating direction of the air cylinder, and a pair of third magnets that are provided near the air valve and attract the intermediate second magnet. Offset printing machine impression cylinder cleaning device. 3. Means for pressing a cleaning surface into or out of contact with the outer circumferential surface of an impression cylinder having a recessed part fitted with a plurality of claws for gripping a sheet, the cleaning part being brought into pressure contact and the rotating impression cylinder; In an offset printing machine impression cylinder cleaning device that performs cleaning by relative movement of the impression cylinder, the pressure contacting or separating means is formed by an air cylinder, and a first exhaust gas is provided close to the outer circumferential surface of the impression cylinder. a second exhaust end that communicates with the first exhaust end to allow high-pressure air to flow therethrough; a second exhaust end that communicates with the second exhaust end and the first exhaust end to control the operating direction of the air cylinder; 1. An impression cylinder cleaning device for an offset printing machine, characterized in that it is equipped with a control device comprising an air valve for cleaning the impression cylinder of an offset printing machine.