JPH0889920A - Cleaning device for long-sized sheet surface - Google Patents

Abstract

PURPOSE: To automatically wash out fine particles such as abrasive powder and dust from the surface to clean it without resorting handwork by rotating a washing roll on the surface layer of which a liquid holding layer is formed in the reverse direction to the transfer one of a long-sized sheet to bring it into press contact with the surface of the long-sized sheet. CONSTITUTION: The main part of a cleaning device 8 is constituted of a washer 5 and a dryer 7. The washer 5 is constituted of a washing roll 19 and a solution tank 23. A liquid holding tank 27 is formed on the outer peripheral part of the washing roll 19. Incidentally, a blanket sheet S whose surface has been ground by a grinding device 3 is first transferred to the washer 5 and is pressed against a washing roll 19 by a press adjusting roll 24. At this time, the washing roll 19 is rotated in the reverse direction to the transfer one of the sheet S to wash out abrasive powder and the like after grinding stuck on the surface from it. The washing roll 19 is immersed in the diametrical direction and washed in an inner tank 20, and brought into press contact with the surface of the sheet S again. On the other hand, in the dryer 7, droplets are removed from the sheet by an abutting plate 33, and the sheet is dried by warm air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for cleaning fine powder such as shavings, dust or dust after polishing the surface of a sheet to clean the same, and more specifically to a printing blanket, a plastic sheet, a rubber sheet. The present invention relates to a cleaning device for a long sheet surface, which cleans by washing away fine powder adhering to the sheet surface such as a wall material cloth.

[0002]

2. Description of the Related Art A printing blanket used for offset printing comprises a reinforcing layer made of a plurality of woven fabrics and a surface layer serving as a printing surface, and includes a compressible printing blanket having a compressible layer and a compressible layer. There is a non-compressible printing blanket which does not have. FIG. 4 shows an example of the structure of a compressible printing blanket that has been generally used conventionally. The compressible printing blanket 10 comprises a support 1 formed by laminating a cotton cloth, a rayon cloth, a polyester cloth or the like in two or three layers, and the compressive layer 3 is formed on the support 1. It is formed by laminating an oil-resistant surface rubber layer 9 to be a printing surface on the layer 3 with a support 5 made of cotton cloth interposed therebetween.

In order to manufacture the printing blanket, after laminating it on the structure, the surface rubber layer 9 is dusted with talc for anti-sticking treatment, and the vulcanized paper is sandwiched and wound up on a roll. Vulcanized. After the vulcanization is completed, the surface rubber layer 9 is polished by a polishing device such as a sandpaper grinder, and the surface is formed into a fine uneven surface having a predetermined roughness. This surface roughness is usually 10 with a stylus roughness meter.
The point average roughness is formed from 2 μm to 15 μm. After polishing, it is cleaned by wiping away fine powder such as shavings and dust or dust adhering to the surface by polishing.

[0004]

The wiping of the fine powder is performed manually with a cloth moistened with water, but at the same time, a quality inspection such as scratches on the surface and the presence of deposits is also performed. That is,
Since the blanket surface cannot be wiped off at the same time as it is polished and wound on a roll, the blanket is once wound on a roll after polishing and then rewound and the surface is wiped off and a quality inspection is performed. However,
Manual wiping of the blanket surface is inefficient and poor in productivity. In addition, when the surface quality is inspected, it is difficult to reflect the light when it is wet, which makes it impossible to perform a sufficient inspection. Therefore,
After the wiping off, it is necessary to wait for the surface to dry, and there is a problem that productivity is further deteriorated.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and it is an object of the present invention to provide a long sheet surface which can be automatically cleaned by cleaning fine powder such as shavings and dust without manual work. The purpose is to provide a cleaning device.

[0006]

In order to achieve the above object, the present invention has the following constitution. That is, claim 1
The cleaning device for cleaning the surface of the long sheet of the present invention comprises a cleaning device and a drying device. The cleaning device dips a cleaning roll having a liquid-retaining layer on the surface layer and one-half or less of the diameter of the cleaning roll. The cleaning roll is configured to rotate in a direction opposite to the sheet transfer direction so as to be pressed against the surface of the sheet. In addition, in the cleaning device for a long sheet surface according to claim 2, a space is provided between the inner tank for immersing the cleaning tank in the solution tank and the inner tank for accommodating the inner tank and part or all of the outer peripheral surface of the inner tank. It is characterized in that it is configured with an outer tank provided. Further, the cleaning device for cleaning a long sheet surface according to a third aspect of the present invention is characterized in that the drying device is formed by an abutting plate that abuts the sheet surface and a warm air blowing tube that blows warm air to the sheet surface. is there.

[0007]

According to the first aspect of the present invention, since the cleaning roll rotates in the direction opposite to the sheet transport direction, fine powder such as shavings and dust on the surface is rubbed off. Further, since the fine powder adhering to the cleaning roll is cleaned by rotating the surface layer of the cleaning roll while being immersed in the solution tank, a clean surface always comes into contact with the sheet surface. Further, it is possible to wind the sheet on a take-up roll without any wetted portion on the surface of the sheet with a drying device. In addition, according to claim 2, by making the solution tank a two tank structure of an inner tank and an outer tank, the whole tank can be downsized, and the inner tank into which the cleaning roll is immersed is always new. Can be replenished with fresh solution to keep it clear. In addition, in the third aspect, the contact plate removes the water droplets and the wet portion is dried by the warm air blown from the warm air blowing tube, so that the moisture can be evaporated in a short time.

[0008]

EXAMPLES Specific examples of the present invention will be described.
FIG. 1 shows a case where a device for cleaning fine powder after polishing the surface of a printing blanket is provided during a manufacturing process of a printing blanket. That is, 1 is a roll of the blanket after vulcanization, 3 is a polishing device, 5 is a cleaning device, 7 is a drying device, and 8
Is a cleaning device including the cleaning device 5 and the drying device 7. The roll 1 of the blanket is a roll vulcanized by dusting talc on the surface rubber layer and sandwiching vulcanized paper, and the blanket sheet S is drawn out to the polishing device 3 while rewinding. In the polishing apparatus 3, a contact roller 9 and a tension roller 10 driven by an electric motor are wound with a polishing belt 11 formed of sandpaper. Above the contact roll 9, a pressure roll 1 for pressing the blanket sheet S against the polishing belt 11 is provided.
3 are provided.

In the polishing by the polishing apparatus 3 having the above-described structure, the blanket sheet S is fed by the feed roll 17 so that the surface rubber layer 9 is brought into contact with the polishing belt 11 and fed between the contact roll 9 and the pressure roll 13, and at the same time, a pair of drawers are pulled out. It is pulled out by the roll 15. At this time, the pressure roll 13 is rotated so as to be sent out in the transport direction of the blanket sheet S, but the contact roll 9 is rotated in the reverse direction. Therefore, the polishing belt 11 is polished against the progress of the blanket sheet S, and is cut into an undercut.

The polished blanket sheet S is transferred to the cleaning device 8. The cleaning device 8 includes a cleaning device 5 and a drying device 7. The cleaning device 5 includes a cleaning roll 19 arranged at a right angle to the transfer direction of the blanket sheet S, and a solution tank 23 composed of an inner tank 20 and an outer tank 21. A circulation mechanism 25 with a purifying device for returning the cleaning liquid to the inner tank 20 is attached. A liquid retaining layer 27 is formed on the outer peripheral portion of the cleaning roll 19. The liquid-retaining layer 27 can be formed by winding a material such as cloth, felt, and sponge which is soaked with liquid and has a certain elasticity on the outer peripheral surface of a rubber roll or a metal roll. The cleaning roll 19 is rotated several times to several tens times faster than the blanket sheet S, preferably 25 to 35 times faster.

The cleaning roll 19 has a diameter of ½.
Hereafter, preferably about one-third is immersed, and the blanket sheet S is arranged so as to rotate in the opposite direction (counterclockwise direction in FIG. 1) to the transport direction of the blanket sheet S by a drive device (not shown). Cleaning roll 19 containing water on the outer periphery
By pressing the blanket sheet S against the blanket sheet S in the reverse direction, it is possible to scrub and wash away fine powder such as shavings and graze adhering to the surface. Further, a pressing adjustment roll 24 for pressing the blanket sheet S against the cleaning roll 19 is provided between the pull-out roll 15 and the cleaning roll 19. The pressing adjustment roll 24 is vertically movable and is formed so that the pressing force of the blanket sheet S against the cleaning roll 19 can be adjusted. The pressing adjusting roll 24 may be changed to a fixed cylindrical pipe instead of the rotating body as long as it can move up and down and guides the blanket sheet S.

In the solution tank 23, the outer tank 21 is the inner tank 2
It is formed by digging outside 0, and is configured to circulate and purify the solution in the inner tank 20 and the outer tank 21. That is, the inner tank 20 is provided with a discharge pipe 29 for discharging a solution having a certain water level or higher to the outer tank 21 and an injection pipe 30 connected to the purifying device, and the outer tank 21 is connected to the purifying device. A pipe 31 is provided. Therefore, the dirty solution in the inner tank 20 is once discharged from the discharge pipe 29 to the outer tank 21, is sent from the outer tank 21 to the purification device, and the clean solution from the purification device is replenished in the inner tank 20.

In this way, the solution tank 23 is divided into the inner tank 20 and the outer tank 2
In the case of the two-vessel structure of No. 1, the liquid level of the cleaning roll 19 can be made constant by making the water level of the inner tank 20 constant at all times, whereby a constant cleaning effect can be provided. it can. Further, the cleaning roll 19 need not be a large-sized solution tank as long as it is supplied with a constant solution. Therefore, by using a two-tank structure, the inner tank 2
By downsizing 0 and downsizing the inner tank 20, the dirty solution in the inner tank 20 can be immediately discharged and a clean solution can be replenished. In addition, the solution can be appropriately selected, such as water and a detergent added to water, and may be properly used depending on the type of sheet.

The drying device 7 includes a blanket sheet S.
Of the surface of the blanket sheet S, the contact plate 33 that contacts the surface of the blanket sheet S, the pressing adjustment roll 35 that adjusts the pressing force of the blanket sheet S against the contact plate 33, and the surface of the contact plate 33. It is composed of a warm air blowing pipe 36 for evaporating water. The contact plate 33 scrubs off the moisture adhering to the surface of the blanket sheet S transferred from the cleaning device 5, and the force for pressing the blanket sheet S is adjusted by the vertical movement of the pressing adjustment roll 35. . A large number of small holes are bored in the warm air blowing pipe 36 in the axial direction, and are provided in parallel with the pressing adjustment roll 35 so that the warm air is blown toward the surface of the blanket sheet S.

The blanket sheet S whose surface has been dried by the drying device 7 is guided by the guide roll 39 and wound up by the winding roll 40. The blanket sheet S wound on the winding roll 40 is sent to the final inspection process. In addition, the drying device 7 is a blanket sheet S.
In addition to the above embodiment, for example, as shown in FIG. 3, the blanket sheet S can be used to remove water on the surface of the blanket sheet S.
The surface of can be wound around the hot roll 41 and pressed by the guide roll 43 to be dried. In this case, a plurality of heat rolls 41 may be appropriately used as needed. Further, the drying device may be simply a drying chamber, and the drying device may be dried by passing through the drying chamber. Other changes and modifications are possible. Further, the solution tank 23 does not necessarily have a two-tank structure and may be one tank. Further, the solution in the solution tank 23 may be supplied with a new solution and discharged with the contaminated solution without being circulated by the circulation mechanism 25.

To describe an example of use in the above embodiment, the blanket sheet S whose surface has been polished by the polishing device 3 is transferred to the cleaning device 5 with its surface facing downward. The blanket sheet S is pressed against the cleaning roll 19 by the pressing adjustment roll 24. Cleaning roll 19
Is rotated in the direction opposite to the transport direction of the blanket sheet S, so that fine powder such as shavings, dust, or dust adhering to the surface is rubbed off. Since the cleaning roll 19 is immersed in the radial direction, the cleaning roll 19 is cleaned in the inner tank 20 and comes into pressure contact with the surface of the blanket sheet S again. The cleaning effect can be improved by increasing the rotation speed of the cleaning roll 19.

In the drying device 7, water drops are dropped by the contact plate 33, and the wetted portion of the surface is dried by warm air from the warm air blowing pipe 37. The blanket sheet S transferred from the drying device 7 is immediately taken up by the take-up roll 40.

[0018]

According to the cleaning apparatus of the present invention, it is possible to automatically wash and remove shavings, dust, dust, etc. after polishing the surface of a long sheet, and particularly to remove a blanket for printing and a plastic sheet. , Rubber sheet,
It is effective for long sheets such as wall cloth. Further, it can be wound on a winding roll in a state where the surface is dried by a drying device.

[Brief description of drawings]

FIG. 1 is an explanatory side view provided during a manufacturing process of a printing blanket.

FIG. 2 is a plan view for explaining the cleaning device.

FIG. 3 is a side view for explaining another embodiment of the drying device.

FIG. 4 is a cross-sectional view showing an example of a printing blanket.

[Explanation of symbols]

 5 Cleaning Device 7 Drying Device 8 Cleaning Device 19 Cleaning Roll 20 Inner Tank 21 Outer Tank 23 Solution Tank 24 Pressing Adjustment Roll 25 Circulating Mechanism 27 Liquid Retaining Layer 29 Discharge Pipe 30 Injection Pipe 31 Piping 33 Contact Plate 35 Pushing Adjustment Roll 37 Hot air blow pipe 39 Guide roll 40 Winding roll 41 Heat roll 43 Guide roll

Claims (3)

[Claims] 1. A cleaning device comprising a cleaning device and a drying device, wherein the cleaning device is provided with a liquid-retaining layer as a surface layer, and one half or less of the diameter of the cleaning roll is dipped to prepare a new solution. A cleaning device for a long sheet surface, comprising a replenishable solution tank, wherein the cleaning roll is rotated in a direction opposite to a sheet transfer direction and brought into pressure contact with the surface of the sheet. 2. The solution tank comprises an inner tank in which the cleaning roll is dipped, and an outer tank which houses the inner tank and is provided with a space between a part or all of the outer peripheral surface of the inner tank. The cleaning device for cleaning the surface of a long sheet according to claim 1. 3. The long sheet surface according to claim 1, wherein the drying device is formed by an abutting plate that abuts against the sheet surface and a warm air blowing tube that blows warm air onto the sheet surface. Cleaning device.