JPH0746534Y2 - Engaging device for printing cylinder cleaning unit - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engaging device for a printing cylinder cleaning unit, and more particularly, to a cleaning unit for cleaning dirt adhered to the surface of a cylinder such as a blanket cylinder of a printing machine. An improvement in an engaging device for actuating in position.

[0002]

2. Description of the Related Art A cleaning device for a printing cylinder cleans the cylinder surface by bringing a rotating brush or a cleaning sheet wet with a cleaning liquid into contact with the printing cylinder. For this reason, the cleaning device is driven by the engaging device so as to come into contact with the cylinder body during cleaning and separate from the cylinder body during non-cleaning.

A conventional general engagement device has a slide guide for bringing the cleaning unit into contact with or away from the printing cylinder, and the unit facing the blanket cylinder is reciprocated back and forth while guiding the slide guide. The structure is such that an air cylinder device for driving is provided.
Moreover, since the structure becomes large in size when the unit is slide-guided, an engaging device as shown in FIG. 3 is adopted. This has swing arms 2 for contact and separation operations which are arranged at both ends of the cleaning device unit 1 and hold and hold the unit 1. One end of the swing arm 2 is supported by a rotation support shaft 3 on a fixed plate (not shown), and the other end of the swing arm 2 is also connected to a telescopic rod of an air cylinder 4 attached to the fixation plate. 3 can be driven to swing. Then, a stopper rod 6 is attached to the swing arm 2 so that a cleaning portion such as a brush of the cleaning device unit 1 appropriately contacts the cylinder body 5.
A stopper plate 7 is provided on a fixed plate (not shown).
As a result, when the swing arm 2 is swung toward the cylinder body 5 for the cleaning operation, the stopper rod 6 comes into contact with the stopper plate 7 to perform positioning, and in this state, the cleaning portion such as the brush is moved to the cylinder body 5. 5 is set so as to be contacted with an appropriate contact pressure. Further, in order to adjust the contact pressure, the stopper rod 6 is provided with an adjusting bolt 8 so that the contact pressure can be arbitrarily set by adjusting the bolt 8.

[0004]

However, if the cleaning unit is configured to move in the front-rear direction with respect to the blanket cylinder or the like, there is a drawback that a slide guide is required in addition to the driving means to complicate the structure. . Also, FIG.
Even in the engagement device shown in Fig. 7, the linear approximation mechanism eventually moves back and forth with respect to the cleaning unit blanket cylinder, which requires a space for installing the linear approximation mechanism, which complicates the structure and reduces the size of the narrow printing cylinder group. There was a mounting problem between the two.

The object of the present invention is to pay attention to the above-mentioned conventional problems and to make it possible to efficiently move the cleaning unit to and from the cylinder to be cleaned without requiring a space for back and forth movement while having an extremely simple structure. Another object of the present invention is to provide an engaging device for a printing cylinder cleaning unit.

[0006]

In order to achieve the above object, an engaging device for a printing cylinder cleaning unit according to the present invention holds a cleaning unit for cleaning the surface of the printing cylinder, and is provided with respect to the printing cylinder. An engaging device that drives a cleaning unit to move toward and away from the cleaning unit, wherein the cleaning unit is rotatably supported by a spindle parallel to the rotation axis of the printing cylinder to be cleaned, and the cleaning unit of the unit is attached to the printing cylinder. In addition to being attachable / detachable, an urging means for urging the cleaning part in the cylinder separating direction around the support shaft and a stopper for defining the cleaning part at the cylinder contact position are provided, and are placed in the rotation area of the cleaning unit. Wash
Provide an expansion means that is placed in contact with the cleaning unit,
The cleaning unit by expanding the expansion means
Is rotated until it touches the stopper.
And are characterized .

[0007]

According to the above construction, the cleaning unit is directly rotatably supported by the support shaft, and the unit is rotated by supplying working fluid such as air to the working expansion means composed of a rubber tube or the like. The cleaning unit can then be brought into contact with the printing cylinder. Since the cleaning position is defined by the stopper, it is held at an appropriate position. And
At the end of cleaning, the working expansion means is opened to the atmosphere, whereby the working fluid is discharged by the action of the biasing means, and the cleaning section is separated from the printing cylinder. The working fluid can be used as a device that does not require a special drive source by utilizing the air supply path of the air cylinder for winding the cleaning sheet.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of an engagement device for a printing cylinder cleaning unit according to the present invention will be described in detail below with reference to the drawings.

1 and 2 are side views of an engaging device of a printing cylinder cleaning unit according to an embodiment.
Shows a washed state, and FIG. 2 shows a non-washed state. As shown in these figures, the cleaning unit 10 is a blanket cylinder 12 to be cleaned, and is arranged so as to face the surface of the blanket cylinder 12. The cleaning unit 10 includes a frame including a main stay 14 arranged in parallel with the axis of the blanket cylinder 12 and side plates 16 supporting both ends of the main stay 14. The main stay 14 has an L-shaped cross section, and its flat surface is arranged toward the blanket cylinder 12, which has a crimping portion made of a rubber pad 18 held by a pad base and a pad retainer arranged on the side of the pad base. It is provided.

Further, for the crimping portion having the above-mentioned bulging structure,
The cleaning sheet 20 is supplied to the outer surface side of the rubber pad 18,
This is brought into contact with the blanket cylinder 12 for wiping and cleaning. The cleaning sheet 20 is a sheet roll 2 arranged behind the main stay 14.
It is possible to extend from 2. The sheet roll 22 is attached by mounting a core tube on a feeding shaft 24 provided on the side plate 16 so that the cleaning sheet 20 is fed in a direction opposite to the rotation direction (arrow A) of the blanket cylinder 12. The cleaning sheet 20 is provided from the one hem of the pressure-bonding portion having a convex cross section to the pressure-bonding convex, contacts the rubber pad 18 at the top and reaches the other hem, and is provided behind the sheet roll 22. It is adapted to be wound around a winding shaft 26. Further, the winding shaft 26 is provided with a constant-size winding mechanism 28, and by intermittently rotating the winding shaft 26 by a constant amount, the cleaning sheet 20 is wound by a constant size. That is, the constant-size winding mechanism 28
Has a lever portion 32 for rotating the take-up shaft 26 by an air cylinder mechanism 30 attached to the side plate 16, and takes up the cleaning sheet 20 when the air cylinder mechanism 30 is retracted. Further, a regulation lever 34 for regulating the return movement amount of the lever portion 32 is attached to the side plate 16, and this is provided with a roller 36 which comes into contact with the outer surface of the wound cleaning sheet 20. A cam curve portion 38 that regulates the return stroke of the lever portion 32 according to the position of the roller 36, that is, the winding diameter of the cleaning sheet 20, is formed on the lever portion 32, and the winding start position of the air cylinder mechanism 30. Is adjusted according to the winding diameter of the cleaning sheet 20, so that the winding dimension is always constant even if the winding diameter changes.

An engaging device for driving the cleaning unit 10 into and out of contact with the blanket cylinder 12 is configured to move the unit 10 in the rotational tangential direction side of the blanket cylinder 12. That is, the side plate 16 of the cleaning unit 10 is extended rearward,
A support shaft 40 arranged parallel to the central axis of rotation of the blanket cylinder 12 is attached to this extended end portion. Therefore, the cleaning unit 10 is rotatable about the support shaft 40, and the cleaning sheet 2 is attached to the tip of the rubber pad 18.
The cleaning unit passing through 2 can be moved by rotating to the tangential direction side of the blanket cylinder 12. Then, the cleaning unit 10 has an upper edge portion at which the unit 10
A spring 42 is arranged as a biasing means for biasing the counterclockwise rotation around the support shaft 40. In this structure, a spring seat 46 is attached to a fixed plate 44 supporting the blanket cylinder 12 to elastically press the upper edge portion of the unit side plate 16. This urging direction is a direction in which the unit cleaning section is separated from the blanket cylinder 12. Further, the spring seat 46 is provided with a stopper shaft 48 for contacting the side plate 16 portion when the unit 10 is rotated clockwise in the drawing and preventing further rotation. Yes, and the stop position is blanket cylinder 12
It is set to come into contact with and to be in a cleaning state. The stopper shaft 48 can be screwed back and forth so that the stop position can be adjusted, whereby the pressure contact nip width of the rubber pad 18 constituting the cleaning portion can be adjusted.

Further, the operating expander 5 is located on the side opposite to the mounting position of the spring 42 and the stopper shaft 48 and is capable of rotating the cleaning unit 10 in the clockwise direction.
0 is provided. This is composed of a rubber tube, and is expanded and contracted by supplying compressed air into the inside thereof, and at the time of expansion, the lower edge portion of the unit side plate 16 is lifted to move the unit cleaning unit to the blanket cleaning position. That is, the fixed plate 4
A tube mounting base 52 is fixed to the unit 4, and an operating expander 50 made of a rubber tube is attached to the unit mounting plate 52 so as to face the unit side plate 16. In order to surely transmit the expansion action of the working expansion body 50 to the cleaning unit 10, a receiving plate 54 is attached to the lower edge portion of the side plate 16 so that the receiving plate 54 and the attachment base 52 expand and contract. ing.

In order to supply compressed air to the working expansion body 50, an air line 58 branched from the air supply line 56 to the air cylinder mechanism 30 in the above-mentioned constant-size winding mechanism 28 is provided, and this is provided on the tube mounting base. It is connected to the actuating expander 50 via 52. The branch air line 58 is provided with a flow passage switching valve 60, which is connected to an air supply source 62 to supply compressed air to the working expansion body 50 and to open the working expansion body 50 side to the atmosphere. It is possible to switch to. This flow path switching valve 60
Is controlled by the controller 64, and the switching operation is performed in conjunction with the operation of the opening / closing valve 66 of the air cylinder 30 of the constant-size winding mechanism 28. That is,
Since the fixed-size winding operation of the cleaning sheet 20 is performed when the unit 10 is in the non-cleaning position, the air cylinder 30 is supplied when the operating expansion body 50 is supplied with air in order to move the cleaning unit 10 to the cleaning position. In order to cut off the flow path to the air cleaning chamber and move it to the non-cleaning position, the flow path to the air cylinder 30 is connected to the air supply source 62 after the working expansion body 50 is opened to the atmosphere.

According to the engaging device constructed as described above, the cleaning unit 10 is moved to the cleaning position by supplying and discharging compressed air to and from the actuating expander 50, and conversely, the non-cleaning position. Can be saved.
That is, when compressed air is supplied to the working expansion pair 50 through the branch air line 58, the working expansion pair 50 expands as shown in FIG. 1 to rotate the cleaning unit 10 clockwise about the rotation support shaft 40. To do. With this rotation, the spring 42 contracts, and the upper edge of the unit side plate 16 contacts the stopper shaft 48 and is stopped. This stop position corresponds to the cleaning start state. Therefore, the cleaning unit 1
The cleaning unit of 0 can be wiped and cleaned by pressing it against the blanket cylinder 12.

After the cleaning is completed, the air in the working expansion pair 50 is exhausted, which is performed by operating the switching valve 60 to open the atmosphere. Working expansion vs. 50
In addition to the self-weight of the cleaning unit 10, the elastic force urging force of the spring 42 acts. Therefore, the working expansion pair 50 in the atmosphere open state is compressed by the unit load and the acting force of the spring 42, and the cleaning unit 10 moves to the retracted position shown in FIG. This position is spring 4
Held by two.

In such an embodiment, the operation of reciprocating the cleaning unit between the cleaning position and the retracted position is performed by the spindle 40.
The rotation of the unit 10 itself around
The drive source is performed by the expansion and contraction action of the actuating expansion body 50.
Since the actuating expander 50, the spring 42, and the stopper shaft 48 only have to be arranged to face the edges of the side plates 16 on both sides of the cleaning unit 10, a very compact structure can be achieved. In particular, since the working fluid for the working expansion body 50 uses the air supply source 62 of the air cylinder 30 for constant-size winding, and no special air cylinder mechanism is used, an engaging device having a simple structure can be obtained. It is very easy to install in a narrow space.

In the above embodiment, the spring 42, the stopper shaft 48, and the actuating expander 50 are arranged at the upper and lower positions with the unit 10 in between, but this generates a rotational force about the support shaft 40. As long as the arrangement is possible, any position can be set as appropriate. Further, the spring 42 and the actuating expansion body 50 may be configured as one unit.

[0018]

As described above, according to the present invention,
The cleaning unit is rotatably supported by a spindle parallel to the rotation axis of the printing cylinder to be cleaned, and the cleaning section of the unit is attached to and detachable from the printing cylinder, and the cleaning section is centered on the spindle. An urging means for urging the cylinder in the separating direction and a stopper for defining the cleaning portion at the cylinder contact position are provided, and the stopper is placed in the rotation area of the cleaning unit.
Providing expansion means arranged in contact with the cleaning unit,
The cleaning unit is expanded by expanding the expansion means.
Is configured to rotate until it contacts the stopper.
Therefore, it is possible to provide an engaging device for a printing cylinder cleaning unit , which has an extremely simple structure and is capable of efficiently moving the cleaning unit in and out of the cylinder to be cleaned without requiring a space for back and forth movement. .

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a cleaning device equipped with an engaging device according to an embodiment and showing a driving state to a cleaning position.

FIG. 2 is a cross-sectional view showing a cleaning device equipped with the engaging device according to the embodiment and showing a retracted state to a non-cleaning position.

FIG. 3 is an explanatory diagram of a conventional engaging device.

[Explanation of symbols]

 10 Cleaning Unit 12 Blanket Cylinder 14 Main Stay 16 Side Plate 18 Rubber Pad 20 Cleaning Sheet 22 Sheet Roll 24 Feeding Shaft 26 Winding Shaft 28 Fixed Size Winding Mechanism 30 Air Cylinder Mechanism 32 Lever Part 34 Regulator Lever 36 Roller 38 Cam Curve Part 40 Support Shaft 42 Spring 44 Fixed plate 46 Spring seat 48 Stopper shaft 50 Working expander 52 Tube mounting base 54 Receiving plate 56 Air supply line 58 Branch air line 60 Flow path switching valve 62 Air supply source 64 Controller 66 Open / close valve

Claims (1)

[Scope of utility model registration request] 1. An engagement device, which holds a cleaning unit for cleaning the surface of a printing cylinder and drives the cleaning unit to move toward and away from the printing cylinder, wherein the cleaning unit rotates the printing cylinder to be cleaned. A cleaning unit of the unit is rotatably supported by a support shaft parallel to the shaft so as to be attached to and detached from the printing cylinder, and a biasing unit that biases the cleaning unit in the cylinder separating direction about the support shaft. And a stopper that regulates the cleaning part to the cylinder contact position, and place it in the rotation area of the cleaning unit
Provide an expansion means that is placed in contact with the cleaning unit,
The cleaning unit by expanding the expansion means
Is rotated until it touches the stopper.
An engagement device for a printing cylinder cleaning unit, which is characterized by: