JPH08244200A - Liquid scraping apparatus for rotor - Google Patents

Abstract

PURPOSE: To reduce the wears of a wiping roller and a doctor blade by reducing the contact pressure with the blade and to eliminate the scattering of cleanser to the periphery. CONSTITUTION: A second blade 61 in contact with the periphery of a wiping roller 26 at the rotating rear side of the roller 26 with the contact part of a doctor blade 32 is provided, a second blade 61 is inclined so that the end 62 is directed toward the rotating direction front side of the roller 26, the cleanser 25 adhered to the periphery of the roller 26 is scraped by the blade 61 in surface contact with the cleanser 25, and then scraped by the blade 32. The contact pressure of the blade 32 is lowered to reduce the wears of the roller 26 and the blade 32, and the scattering of the cleanser 25 to the periphery is obviated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid scraping device for a rotating body, and is suitable for application to a wiping device for removing ink adhering to the surface of the cylinder of a printing machine.

[0002]

2. Description of the Related Art For example, when printing with an intaglio printing machine,
The ink is transferred to the intaglio surface on the intaglio cylinder by the inking device, and the ink that has adhered to the areas other than the image area of the transferred ink is wiped off by the wiping roller that rotates against the intaglio surface. Printing is performed by transferring a part of the ink to the paper passing between the intaglio cylinder and the impression cylinder. The wiping roller is driven and rotated by being immersed in a cleaning liquid such as a caustic soda aqueous solution contained in a liquid tank, and the ink adhering to the surface is removed. The wiping roller being driven and rotated prevents the cleaning liquid in the liquid tank from being entrained by the liquid scraping device and prevents the cleaning liquid from adhering to the intaglio cylinder.

A conventional liquid scraping device will be described with reference to FIGS. 5 and 6. FIG. 5 shows the overall situation of a wiping device equipped with a conventional liquid scraping device, and FIG. 6 shows a view taken along arrow VI in FIG.

As shown in FIG. 5, an intaglio cylinder 1 is rotatably supported by a machine frame (not shown) in the direction of arrow A in the figure, and an image line portion is formed in a concave shape on the peripheral surface of the intaglio cylinder 1. The intaglio 2 is attached. The wiping device 3 is provided with a box-shaped liquid tank 4, and a cleaning liquid 5 is stored in the liquid tank 4. A wiping roller 6 is rotatably supported in the liquid tank 4 so as to be reciprocally movable in the axial direction.
The lower part of the is immersed in the cleaning liquid 5. The wiping roller 6 is driven and rotated in the direction of arrow B in the figure opposite to the intaglio cylinder 1, and the peripheral surface of the wiping roller 6 is in contact with the surface of the intaglio plate 2 of the intaglio cylinder 1.

Further, the liquid tank 4 is provided with four brush shafts 7 along the axial direction of the wiping roller 6, and the brush shafts 7
A base 8 is attached to the. A brush 9 is planted in the base 8, and the brush 9 is in contact with the peripheral surface of the wiping roller 6 in the cleaning liquid 5 via the pad 10. A doctor 11 is provided in the liquid tank 4 on the outlet side of the wiping roller 6 from the cleaning liquid 5, and the doctor 11 is provided with a doctor blade 12 that comes into contact with the peripheral surface of the wiping roller 6. The doctor 11 can be moved back and forth with respect to the wiping roller 6 by operating the screw handle 13, and the gap between the doctor blade 12 and the wiping roller 6 can be adjusted. By the doctor blade 12, the cleaning liquid 5 attached to the peripheral surface of the wiping roller 6 and rotated along with it is scraped off.

As shown in FIG. 6, a supporting shaft 15 parallel to the axis of the wiping roller 6 is provided on the side plate 14 of the liquid tank 4, and a table 16 is movably supported along the supporting shaft 15. . A compression spring 17 is interposed between the side plate 14 and the base 16 on the outer periphery of the support shaft 15, and the base 16 is biased by the compression spring 17 toward the side surface 6 a of the wiping roller 6. A scraper 18 extending substantially horizontally is fixed to the table 16, and the scraper 18 is pressed against the side surface 6a of the wiping roller 6 by the spring force of the compression spring 17 so as to follow the axial movement. The scraper 18 is adapted to scrape off the cleaning liquid 5 attached to the side surface 6a of the wiping roller 6 and entrained therewith.

The ink is transferred to the surface of the intaglio plate 2 on the intaglio cylinder 1 by an inking device (not shown), and the ink other than the image area is wiped off by the wiping roller 6 and adheres to the peripheral surface of the wiping roller 6. The ink attached to the wiping roller 6 is removed in the cleaning liquid 5 by the dissolving action of the cleaning liquid 5 and the pressing action of the pad 10. Although the cleaning liquid 5 is attached to the wiping roller 6 from which the ink has been removed when the cleaning liquid 5 is ejected, the cleaning liquid 5 on the peripheral surface is scraped off by the doctor blade 12, and the cleaning liquid 5 on the side surface 6a is scraped off. Scraped by 18. As a result, there is no possibility that the cleaning liquid 5 will move together with the wiping roller 6 and the cleaning liquid 5 will adhere to the intaglio plate 2.

In recent years, the speed of rotation of the wiping roller 6 has become higher (for example, 160 rpm or more) along with the increase in speed of printing machines. As the speed of the wiping roller 6 is increased, the amount of the cleaning liquid 5 attached to the peripheral surface and rotated along with the wiping roller 6 is increased, and it has become difficult to scrape off the cleaning liquid 5 only with the doctor blade 12. If the cleaning liquid 5 is insufficiently scraped, the cleaning liquid 5 may be scattered to the intaglio cylinder 1 by the centrifugal force of the wiping roller 6, and the cleaning liquid 5 may adhere to the surface of the intaglio 2 to cause printing failure. Doctor blade 1
The contact pressure of the second wiping roller 6 is increased to enhance the scraping effect. However, if the contact pressure of the doctor blade 12 is increased, the wiping roller 6 is easily worn, which causes early wear and damage. If the wiping roller 6 is prematurely worn or damaged, the wiping state of the ink is deteriorated, and the ink is transferred to the plate surface of the intaglio plate 2 to cause printing failure. Further, cleaning of the intaglio plate 2 and replacement of the wiping roller 6 must be frequently performed, and there is a risk that productivity will be reduced due to machine stoppage.

Therefore, there has been proposed a wiping device capable of sufficiently scraping off the cleaning liquid 5 without increasing the contact pressure of the doctor blade 12 (see Japanese Patent Publication No. 2-8588). The outline of this wiping device will be described with reference to FIG. FIG. 7 shows the overall situation of a wiping device equipped with a liquid scraping device according to another conventional example. The same members as those of the liquid scraping device and the wiping device shown in FIG. 5 are designated by the same reference numerals, and duplicate description is omitted.

As shown in the drawing, the base end of a leaf spring 19 is fixed to the liquid tank 4 below the doctor 11, and the leaf spring 19
A pad 20 is fixed to the tip of the. The pad 20 is in contact with the peripheral surface of the wiping roller 6, and the cleaning liquid 5 on the peripheral surface of the wiping roller 6 is scraped off by the pad 20. The cleaning liquid 5 adheres to the wiping roller 6 from which the ink has been removed when the cleaning liquid 5 comes out, but the cleaning liquid 5 on the peripheral surface is first scraped off by the pad 20 and then by the doctor blade 12. To be
As a result, the cleaning liquid 5 can be sufficiently scraped off without increasing the contact pressure of the doctor blade 12.

[0011]

In the above-mentioned wiping device, the cleaning liquid 5 adhering to the peripheral surface of the wiping roller 6 is continuously scraped off by the doctor blade 12 and the pad 20, so that the cleaning liquid 5 is removed. Sufficient scraping is possible. However, since the doctor blade 12 and the pad 20 of this wiping device are provided so as to extend along the axial direction of the wiping roller 6, the cleaning liquid 5 may be accumulated between the doctor blade 12 and the pad 20. It was That is, the cleaning liquid 5 that cannot be scraped off by the pad 20 is scraped off by the doctor blade 12, but the cleaning liquid 5 scraped off by the doctor blade 12 has no escape, so that the doctor blade 12 and the pad 20
Will accumulate in between. The accumulated cleaning liquid 5 flows out to the side surface 6a side of the wiping roller 6, and the cleaning liquid 5 is scattered by the centrifugal force and adheres to the intaglio cylinder 1, which may melt the ink of the intaglio 2 and cause printing failure.

The pad 2 is attached to the wiping device 3 shown in FIG.
When 0 is added, the cleaning liquid 5 on the side surface 6a of the wiping roller 6 will be scraped off by the scraper 18. However, the cleaning liquid 5 accumulates between the scraper 18 and the pad 20, and the accumulated cleaning liquid 5 is agitated by the rotation of the wiping roller 6 and moves from the upper portion of the scraper 18 to the side surface of the wiping roller 6 and is centrifugally applied to the intaglio plate 2. There was a risk of adhesion. Therefore, even if the pad 20 is added to the wiping device shown in FIG. 5, the problem that the cleaning liquid 5 is scattered cannot be solved, and there is a possibility that printing defects may occur.

[0013]

The structure of the present invention for solving the above-mentioned problems is a liquid scraping apparatus for a rotating body, which is provided with a blade that comes into contact with the peripheral surface of the rotating body that is driven to rotate by the liquid. A second contacting the peripheral surface of the rotating body on the rear side in the rotation direction of the rotating body with respect to the contact portion of the blade.
A blade is provided, and the tip end portion of the second blade is directed to the front side in the rotation direction of the rotating body.
Further, the second blade is provided so as to be separated from the peripheral surface of the rotating body.

[0014]

The liquid adhering to the peripheral surface of the rotating body is continuously scraped by the second blade as the rotating body rotates, and is scraped by the blade. The liquid attached to the side surface of the rotating body is scraped off by the scraper as the rotating body rotates. Since the tip portion of the second blade is directed to the front side in the rotation direction of the rotating body, the liquid scraped by the blade is returned along the second blade and collects between the second blade and the second blade. There is no. In addition, a space is secured around the rotating body by separating the second blade from the peripheral surface of the rotating body.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid scraping apparatus for a rotating body according to the present invention will be described with reference to FIGS. The one shown in the figure is applied to a cleaning liquid scraping device for scraping the cleaning liquid from a wiping roll in a wiping device of a printing press. Therefore, detailed description of the wiping device is omitted. FIG. 1 is a side view of a main part of a wiping device equipped with a liquid scraping device according to an embodiment of the present invention, FIG. 2 is a development plane in FIG. 1, and FIG. 3 is a second blade from the state in FIG. Is shown in a separated state.

As shown in FIG. 1, an intaglio cylinder 21 is rotatably supported by a machine frame (not shown) in the direction of arrow A in the figure, and an image line portion is formed in a concave shape on the peripheral surface of the intaglio cylinder 21. An intaglio 22 is attached. The wiping device 23 is provided with a box-shaped liquid tank 24, and a cleaning liquid 25 is stored in the liquid tank 24. A wiping roller 26 as a rotating body is supported in the liquid tank 24 so as to be rotatable and reciprocally movable in an axial direction.
It is immersed in 5. The wiping roller 26 is rotated in the direction of arrow B in the figure, and the peripheral surface of the wiping roller 26 is in contact with the surface of the intaglio plate 22 of the intaglio cylinder 21. In the liquid tank 24, a brush member (not shown) that comes in contact with the peripheral surface of the wiping roller 26 to remove the ink is provided.

As shown in FIGS. 1 and 2, a slide base 27 is provided on the upper surface of the liquid tank 24 on the outlet side of the cleaning liquid 25 of the wiping roller 26 via a guide guide (not shown).
Is supported by the wiping roller 26 so as to be movable back and forth, and a doctor 28 is movably supported by the slide base 27. The slide base 27 is interlocked with a cam (not shown) when the wiping roller 26 is attached to or detached from the intaglio cylinder 21. A hydraulic cylinder 29 is attached to the slide base 27, and an operating portion of the hydraulic cylinder 29 is connected to a doctor 28 by a pin 30. The slide base 27 is activated by the operation of the hydraulic cylinder 29.
On the other hand, the doctor 28 is moved, and the doctor 28 can be moved forward and backward independently of the wiping roller 26. Further, the doctor 28 can also be moved with respect to the slide base 27 by the screw handle 31, and the doctor 28 can be manually moved back and forth with respect to the wiping roller 26.

The doctor blade 3 is provided on the doctor 28 as a blade extending along the axial direction of the wiping roller 26.
2 is fixed, and the doctor blade 32 contacts the peripheral surface of the wiping roller 26. By operating the screw handle 31 to move the doctor 28, the gap between the doctor blade 32 and the wiping roller 26 is adjusted.

On the other hand, as shown in the drawing, a scraper unit 43 is detachably provided on the doctor 28 as the apparatus main body side, and a scraper 44 which comes into contact with the side surface 33 of the wiping roller 26 is supported on the scraper unit 43. Has been done. The scraper unit 43 has a handle 43
It is attached to and detached from the doctor 28 by the operation of a. The scraper unit 43 causes the scraper 44 to follow the axial reciprocating movement of the wiping roller 26 and to always keep the side surface 33.
It comes in contact with. The end of the wiping roller 26 on the side of the rotation center P side opposite to the end 45 of the scraper 44 (the wiping roller 26
The end portion 46 on the anti-rotation center P side of the is inclined toward the cleaning liquid 25 side in the liquid tank 24. The cleaning liquid 25 adhering to the side surface 33 of the wiping roller 26 and entrained by the cleaning liquid 25 simultaneously moves downward due to its own weight and in the direction of jumping outward due to centrifugal force, and flows down at an angle. The inclination angle θ of the scraper 44 is set in the range of 20 ° to 30 °, which is substantially the same as the flowing-down angle.

By scraping the end portion 46 of the scraper 44 toward the cleaning liquid 25 side in the liquid tank 24,
The cleaning liquid 25 scraped off by is smoothly flowed down along the lower surface of the scraper 44 and returned to the liquid tank 24. For this reason, the cleaning liquid 25 does not scatter from the liquid tank 24 to the surroundings, and atomization of the cleaning liquid 25 can be prevented. As a result, the generation of rust on the peripheral members is suppressed and the working environment is improved. Further, since the scraper unit 43 is detachably attached to the apparatus main body side,
It can be easily removed from the device side.

On the other hand, a second blade 61 made of spring steel is provided on the rear side (lower side in the drawing) of the wiping roller 26 with respect to the contact portion of the doctor blade 32, and the tip of the second blade 61 is provided. The portion (upper side in the figure) 62 is in contact with the peripheral surface of the wiping roller 26. The second blade 61 is arranged so as to be inclined such that the tip portion thereof is directed to the front side in the rotation direction of the wiping roller 26. The base end portion of the second blade 61 is rotatably supported by the liquid tank 24 via a rotating mechanism 63, and the tip end portion 62 of the second blade 61 is separated from the peripheral surface of the wiping roller 26. There is. That is, the second blade 61 is attached from the lower side to the upper side and is in surface contact with the peripheral surface of the wiping roller 26.

Therefore, by providing the second blade 61 of the present invention, the cleaning liquid 25 scraped off by the second blade 61 is smoothly returned to the liquid tank 24 along the lower surface of the second blade 61. It is possible to prevent atomization that occurs when the cleaning liquid 25 scraped off is hit on the liquid surface. Further, the cleaning liquid 25 scraped off by the doctor blade 32 is smoothly returned to the inside of the liquid tank 24 along the upper surface of the second blade 61, so that the cleaning liquid 25 is removed between the doctor blade 32 and the second blade 61.
It is possible to prevent the cleaning liquid 25 from being atomized without being accumulated. Further, since the cleaning liquid 25 attached to the peripheral surface of the wiping roller 26 on the front side of the doctor blade 32 can be scraped off, the burden on the doctor blade 32 can be reduced. In addition, the second blade 6
The tip portion 62 of No. 1 does not bite into the peripheral surface of the wiping roller 26, and the scraped cleaning liquid 25 can be smoothly returned to the liquid tank 24. In addition, the second blade 6
The tip portion 62 is moved to the wiping roller 26 by the elastic force of 1.
Since the surface of the cleaning liquid 25 is brought into contact with the peripheral surface, the cleaning liquid 25 can be sufficiently scraped off by increasing the contact pressure.

The rotating mechanism 63 will be described with reference to FIGS. As shown in FIGS. 1 and 2, the slide base 27
A bracket 65 is fixed to the wiping roller 26.
A rotary shaft 66 extending parallel to the central axis of the is supported by a bracket 65 so as to be rotatable. A support bracket 67 is rotatably supported on the bracket 65. The first holder 68 and the second holder 69 are fixed to the rotating shaft 66, the base end portion of the second blade 61 is fixed to the first holder 68, and the tool 70 is inserted into the second holder 69. Is formed with a notch 71.

A third holder 72 is fixed to the rotary shaft 66, and a rotary pin 73 is rotatably supported by the third holder 72. A base end portion of a support shaft 74 is fixed to the rotating pin 73, and a tip end portion of the support shaft 74 is supported by a support bracket 67 so as to be slidable in the axial direction. The tip of the support shaft 74 penetrates the support bracket 67, and a double nut 75 is attached to the penetrating portion. A spring 76 is provided on the outer peripheral portion of the support shaft 74 between the rotating pin 73 and the support bracket 67.
The rotating shaft 66 is urged to rotate to one side via the third holder 72. The spindle 7 is adjusted by adjusting the double nut 75.
The urging force of the spring 76, that is, the pressing force of the second blade 61 against the wiping roller 26 can be adjusted by adjusting the penetrating length of the No. 4 support bracket 67.

The urging direction of the rotation shaft 66 by the spring 76 is such that the rotation center of the rotation pin 66 is rotated with respect to the line segment connecting the axis S of the rotation shaft 66 and the rotation center T of the support bracket 67. t
1 is located on the wiping roller 26 side, the second blade 61 is pressed against the wiping roller 26 in the counterclockwise direction in FIG. 1 (state of FIG. 1). When the rotation center t of the rotation pin 73 is located on the side opposite to the line segment connecting the axis S of the rotation shaft 66 and the rotation center T of the support bracket 67, the rotation shaft 66 rotates. The urging direction becomes the clockwise direction, and the second blade 61 is separated from the wiping roller 26 (state of FIG. 3). Incidentally, reference numeral 77 in the drawing is a stopper for restricting the rotational position of the rotary shaft 66 by coming into contact with the third holder 72 when the second blade 61 is rotated so as to be separated from the wiping roller 26. Is.

Therefore, since the second blade 61 is rotatably held by the rotating mechanism 63, the second blade 61 can be easily separated from the peripheral surface of the wiping roller 26, and the double nut 75 can be adjusted. It is possible to freely adjust the contact pressure of the second blade 61 with the peripheral surface of the wiping roller 26. Further, when it is necessary to keep the second blade 61 away from the peripheral surface of the wiping roller 26 when the wiping roller 26 is replaced or when the inside of the liquid tank 24 is cleaned, the rotation center t of the rotation pin 73 is the rotation shaft 66.
The second blade 61 is rotated by rotating the rotary shaft 66 in a state in which the rotary shaft 66 is located on the side opposite to the wiping roller 26 with respect to the line segment connecting the axis S of the shaft and the rotation center T of the support bracket 67.
Can be kept away from the peripheral surface of the wiping roller 26.

As a mechanism for supporting the second blade 61, as shown in FIG. 4, the base end portion of the second blade 61 can be rotatably supported by an air cylinder 81. . That is, the holder 8 is attached to the rotary shaft 66.
2 is fixed, and the base end of the second blade 61 is fixed to the holder 82. Further, another holder 91 is fixed to the rotation shaft 66, and a rotation pin 83 is rotatably supported by the holder 91, while a main body 84 of the air cylinder 81 is rotatably supported by the bracket 65. ing. And
The tip of the piston rod 85 of the air cylinder 81 is fixed to the rotating pin 83. When the piston rod 85 is contracted by the drive of the air cylinder 81, the second blade 61 is pressed against the wiping roller 26 (solid line state in the figure), and when the piston rod 85 extends, the second blade 61 is removed from the wiping roller 26. Separated (state of broken line in the figure).

Reference numeral 86 in the drawing denotes the second blade 6 which the holder 91 abuts when the piston rod 85 contracts.
This is a stopper that regulates the contact position of the first wiping roller 26. At this time, the air cylinder 81 is used with an allowance for the stroke of the piston rod 85.
The pressing pressure of the second blade 61 can be adjusted and the diameter of the wiping roller 26 can be changed. The position regulation when the second blade 61 separates from the wiping roller 26 is performed by the stroke end of the piston rod 85 in the extension direction.

Although the above-described embodiment is applied to the case of scraping the cleaning liquid of the wiping roll in the wiping device of the printing machine as the liquid scraping device, the liquid scraping device of the present invention is applied to the gravure printing machine. It can also be applied as a device (doctor device) for scraping off excess ink from the peripheral surface of the plate cylinder. Further, the rotating body is not limited to one that is immersed in a liquid, and the present invention can be applied to a rotating body whose liquid is supplied to the peripheral surface by a nozzle or the like.

In the wiping device of the printing machine equipped with the cleaning liquid scraping device, the ink adhering to the wiping roller 26 is removed in the cleaning liquid 25. When the cleaning liquid 25 comes out of the cleaning liquid 25, the cleaning liquid 25 is attached to the wiping roller 26 from which the ink has been removed.
First, 5 is scraped off by the second blade 61. The pressing force of the second blade 61 against the wiping roller 26 is adjusted by adjusting the double nut 75, and most of the cleaning liquid 25 is scraped off by the second blade 61. The second blade 61 extends from the lower side to the upper side and is arranged so as to be entirely inclined, and the tip portion 62 is directed to the front side in the rotation direction of the wiping roller 26. Therefore, even if the contact pressure is increased, the wiping roller 26 is The surface of the second blade 61 is not scratched, and there is no possibility that the tip portion 62 of the second blade 61 is deformed upward and damaged regardless of the condition of the peripheral surface of the wiping roller 26.

The cleaning liquid 25 adhering to the side surface 33 of the wiping roller 26 is scraped off by a scraper 44 which comes into contact with the side surface 33 following the axial movement of the wiping roller 26. By making the contact length of the scraper 44 to the side surface 33 longer than the width of the wiping roller 26 immersed in the cleaning liquid 25, all the cleaning liquid 25 adhering to the side surface 33 can be scraped off. In addition, the cleaning liquid 25 that could not be scraped off by the second blade 61
Even if the liquid flows toward the side surface 33, the flowing cleaning liquid 25 is scraped off by the scraper 44.

After that, the cleaning liquid 25 remaining by the doctor blade 32 is scraped off, and the peripheral surface of the wiping roller 26 is finished in a state without the cleaning liquid 25. The cleaning liquid 25 scraped by the doctor blade 32 passes through the back surface side of the second blade 61 and is returned to the liquid tank 24. Therefore, the cleaning liquid 25 does not accumulate between the doctor blade 32 and the second blade 61, and the cleaning liquid 25 does not splash from the side.

During cleaning and removal of the wiping roller 26, the doctor blade 32, the scraper 44 and the second
It is necessary to separate the blade 61 from the wiping roller 26. In this case, first, the doctor blade 32 and the scraper 44 together with the slide base 27 are separated from the wiping roller 26 by the operation of the hydraulic cylinder 29. Next, insert the tool 70 into the notch 71 of the second holder 69,
The rotating shaft 66 is rotated clockwise. This allows
The second blade 61 moves away from the peripheral surface of the wiping roller 26. When the rotating shaft 66 rotates by a certain amount or more, the rotating shaft 66 is biased in the clockwise direction by the spring force of the spring 76, and the state in which the second blade 61 is separated from the peripheral surface of the wiping roller 26 is maintained.

In the above-described cleaning liquid scraping device, most of the cleaning liquid 25 can be scraped by the second blade 61 by adjusting the pressing force of the second blade 61 against the wiping roller 26 by adjusting the double nut 75. Therefore, it is possible to cope with the dimensional change of the wiping roller 26 and reduce the contact pressure of the doctor blade 32 to reduce the wiping roller 26 and the doctor blade 3.
2 wear can be reduced. In addition, the second blade 61 extends upward from below and is entirely inclined,
Since 2 is oriented toward the front side in the rotation direction of the wiping roller 26, there is no possibility of damaging the second blade 61 even if the contact pressure is increased. Further, by supporting the second blade 61 by the rotating mechanism 63, the second blade 61 can be kept away from the peripheral surface of the wiping roller 26, and a space for cleaning and removing the wiping roller 26. It is possible to secure
The scraper unit 43 can be easily attached and detached by operating the handle 43a, which facilitates maintenance work.

Since the cleaning liquid scraping device described above is provided, the wear of the wiping roller 26 and the doctor blade 32 can be reduced, and the life of the wiping roller 26 and the doctor blade 32 can be extended. In addition, since the cleaning liquid 25 does not accumulate between the doctor blade 32 and the second blade 61, the cleaning liquid 25 does not splash and scatter around. Further, since the space can be secured by keeping the second blade 61 away from the peripheral surface of the wiping roller 26, the workability at the time of cleaning and removing the wiping roller 26 is significantly improved. Also, by adjusting the double nut 75, the second
Since the pressing force of the blade 61 against the wiping roller 26 can be adjusted, it is possible to easily deal with the dimensional change of the wiping roller 26.

[0036]

The liquid scraping device for a rotating body according to the present invention comprises:
A second blade that comes into contact with the peripheral surface of the rotating body on the rear side in the rotating direction of the rotating body with respect to the contact portion of the blade is provided, and the tip portion of the second blade is directed toward the front side in the rotating direction of the rotating body. Second surface contact with the liquid adhering to the peripheral surface of the
Since it is scraped by the blade and then scraped by the blade, it is possible to reduce the contact pressure of the blade to reduce the wear of the rotor and the blade, and the liquid does not accumulate between the blade and the second blade. . As a result, the life of the rotating body and the velvet is extended and the productivity is improved, and the liquid is not scattered around.
It is possible to prevent the rusting of peripheral parts and improve the surrounding environment. Further, by separating the second blade from the peripheral surface of the rotating body, a space can be secured around the rotating body, and workability during cleaning or replacement of the rotating body is significantly improved.

[Brief description of drawings]

FIG. 1 is a side view of a wiping device including a liquid scraping device according to an embodiment of the present invention.

FIG. 2 is a developed plan view of FIG.

FIG. 3 is a side view showing a state where the second blade is separated from the state shown in FIG.

FIG. 4 is a side view of a wiping device showing another example of the support mechanism of the second blade.

FIG. 5 is an overall view of a wiping device including a conventional liquid scraping device.

6 is a view on arrow VI in FIG.

FIG. 7 is an overall view of a wiping device including a conventional liquid scraping device.

[Explanation of symbols]

 21 Intaglio cylinder 22 Intaglio 23 Wiping device 24 Liquid tank 25 Cleaning liquid 26 Wiping roller 27 Slide base 28 Doctor 29 Hydraulic cylinder 30 Pin 31 Screw handle 32 Doctor blade 33 Side 43 Scraper unit 44 Scraper 61 Second blade 62 Tip 63 Rotating mechanism 65 bracket 66 rotation shaft 67 support bracket 68 first holder 69 second holder 70 tool 71 notch 72 third holder 73 rotation pin 74 support shaft 75 double nut 76 spring 77 stopper 81 air cylinder 82 holder 83 rotation pin 85 Body 85 Piston rod 86 Stopper

Claims (2)

[Claims] 1. A liquid scraping device for a rotating body, comprising a blade that is in contact with a peripheral surface of a rotating body, to which liquid is attached and is driven to rotate, in a rotating direction of the rotating body with respect to a contact portion of the blade. A second blade that comes into contact with the peripheral surface of the rotating body on the side, and the tip end portion of the second blade is directed to the front side in the rotation direction of the rotating body. . 2. The liquid scraping device for a rotating body according to claim 1, wherein the second blade is provided so as to be separated from the peripheral surface of the rotating body.