KR0185633B1 - Device for cleaning screen plate used in screen printing - Google Patents

Abstract

The present invention relates to a cleaning device for screen plate cleaning for use in screen printing. The cleaning device includes a base structure that can be disposed directly below the screen plate. A pressing member such as a cleaning blade or cleaning roller is attached on the base structure. The pressing member has a contact with the lower surface of the screen plate to wipe off foreign matter from the lower surface when the base structure is moved in a direction parallel to the main surface of the screen plate. In some embodiments, the wash paper soaked with solvent is injected directly between the contact of the pressing member and the bottom surface of the screen plate to enhance the cleaning effect.

Description

Washing device of screen plate used for screen printing

1 is a schematic perspective view of a screen cleaning apparatus according to a first embodiment of the present invention.

2 is an enlarged perspective view of essential components of the first embodiment of the screen cleaning apparatus.

3 is a schematic perspective view of a drive mechanism used in the washing apparatus of the first embodiment.

4 is a perspective view of two cleaning blades mounted on a seesaw plate used in a variant of the first embodiment.

FIG. 5 is a schematic perspective view similar to FIG. 2 showing a second embodiment of the present invention. FIG.

FIG. 6A is a perspective view of a cleaning blade into which a cleaning paper is used for a modification of the second embodiment. FIG.

FIG. 6B is a perspective view of an unwashed cleaning blade used in another variation of the second embodiment. FIG.

7 is a perspective view showing a screen cleaning device according to a third embodiment of the present invention.

8 is a perspective view of the screen cleaning apparatus of the third embodiment for use with another apparatus.

9 is a perspective view showing a screen cleaning device according to a fourth embodiment of the present invention.

10A and 10B are perspective views of a cleaning roller loaded with another cleaning paper used in the fourth embodiment.

11 is a perspective view of a cleaning blade usable in the fourth embodiment.

12a and 12b is a perspective view of a cleaning blade in which another cleaning paper is added.

13, 14 and 15 are perspective views of the screen cleaning apparatus according to the fifth embodiment of the present invention.

16 is a perspective view of a screen cleaning device according to a sixth embodiment of the present invention.

17 is a schematic cross-sectional view of the cleaning apparatus of the sixth embodiment.

18A and 18B are perspective views of a screen cleaning device according to a seventh embodiment of the present invention.

19 is a perspective view similar to FIG. 18B showing an eighth embodiment of the present invention.

FIG. 20 is a perspective view showing essential components of the screen cleaning apparatus according to the ninth embodiment of the present invention. FIG.

21 is a perspective view of the screen cleaning apparatus of the seventh embodiment of FIGS. 18A and 18B.

22 is an enlarged perspective view of one cleaning roller used in the seventh embodiment.

23 is an enlarged side view of the drive mechanism used in the seventh embodiment.

FIG. 24 is a perspective view similar to FIG. 13 showing a screen cleaning apparatus of a tenth embodiment of the present invention. FIG.

25 is a partial perspective view of the tenth embodiment in which the upper and lower rollers are arranged.

FIG. 26 is a partial cutaway perspective view of a tenth embodiment in which a mechanism for adjusting the distance between the upper and lower rollers is disposed;

FIG. 27 is a partial sectional view of the tenth embodiment in which a ball bearing associated with an upper roller is disposed; FIG.

28 is a partial cutaway perspective view of a part in which a ball bearing is disposed.

FIG. 29 is a partially cutaway perspective view of the tenth embodiment in which a rack and pinion are disposed; FIG.

30 is a sectional view taken from the direction of arrow XXX in FIG.

* Explanation of symbols for main parts of the drawings

12a, 12b, 12c: washing blade 14: washing paper

16: base substrate 18, 20: housing

22: paper feed roller 24: paper winding roller

26: pressure roller 28: spring

30: drive roller 38a, 38b: blade holder

44, 46: drive belts 48, 50, 52, 54: guide roller

The present invention relates to a cleaning device for screen plates used for screen printing, more particularly screen printing.

So-called screen printing has been used so far as a printed electric circuit pattern on an insulating base substrate.

The printing apparatus used for such printing is usually a screen plate (or mesh screen plate) that is put onto an insulated base substrate to be printed, while a certain amount of conductive ink is pressed into the screen plate and the screen plate is pressed against the insulated base substrate. It consists of a rubber roller (that is, an ink pressing device) used on the screen plate. Due to this, a predetermined circuit pattern of conductive ink is printed on the surface of the insulating base substrate, which pattern coincides with the perforated printed pattern formed by the screen plate. Thus the printed base substrate is then removed from the screen plate and heated to secure the printed circuit pattern. The screen plate is made of stainless steel mesh and so on.

In order to improve the quality of the print pattern on the base substrate, it is necessary to clean the screen plate at regular intervals. To date, various cleaning devices have been proposed and have been used practically for that purpose. However, due to its inherent structure, some do not have a satisfactory cleaning effect and some are expensive.

It is therefore an object of the present invention to provide a screen cleaning apparatus for use in screen printing without the above mentioned disadvantages.

According to a first aspect of the invention, there is provided a cleaning device for cleaning a screen plate for use in screen printing, the device comprising a base structure disposed directly below the screen plate and first means attached to the base structure. The first means having a contact portion is in contact with the bottom surface of the screen plate to wipe off any foreign matter from the bottom surface when the base structure is moved in a direction parallel to the main surface of the screen plate.

According to a second aspect of the invention, there is provided a cleaning device for cleaning a screen plate for use in screen printing, the device having a base structure, an upper portion of which can be disposed directly below the screen plate, with respect to the bottom surface of the screen plate. A unit comprising at least one cleaning blade being pressed and detachably connected to the base structure, a cleaning paper immediately inserted between the upper surface of the cleaning blade and the lower surface of the screen plate, the upper surface of the cleaning blade and the cleaning paper being a predetermined travel path And a cleaning paper drive mechanism for moving along the substrate, solvent supply means for supplying solvent to the cleaning paper, and moving means for moving the base structure in a direction parallel to the main surface of the screen plate.

According to a third aspect of the invention, there is provided a cleaning device for cleaning a screen plate for use in screen printing, the device being mounted on top of a rectangular housing, a cleaning blade tilted relative to the screen plate, a housing Means for forming first, second and third vertical extension slots in both sidewalls of the drive shaft, the drive shaft being rotatably received in the first slot and having a star-shaped cross section, rotatably received in the first slot; A pressure roller introduced on the drive shaft, two guide rollers rotatably received in the second and third slots respectively, and a top of the cleaning blade and an operation roller on the pressure roller and the two guide rollers, It includes endless washing paper directly inserted between the rollers.

According to a fourth aspect of the present invention, there is provided a cleaning device for cleaning a screen plate for use in screen printing, the device operating in a housing at a position remote from the paper feed roller, a feeding roller operatively installed in the housing. A press member pressed against the bottom surface of the screen plate, with a washing paper extending from the paper feed roller to the winding roller, a washing paper installed on the housing and directly inserted therebetween, and a base pivotally connected to the housing. A substrate, an air cylinder mounted on the base substrate, a drive roller mounted on the base substrate and driven by the air cylinder, a pressure roller rotatably installed in the housing, and means for transmitting rotation of the pressure roller to the winding roller. Drive roller is placed in close contact therebetween when the base substrate is pivoted to a constant working position. It is pressed against the pressure roller with the cleaning paper.

According to a fifth aspect of the present invention, there is provided a cleaning device for cleaning a screen plate for use in screen printing, the device comprising a housing, a shaft rotatably disposed within the housing, with a plurality of cleaning blades disposed nearby, cleaning First means for rotating the shaft such that the top of the blade contacts the bottom surface of the screen plate and second means for supplying solvent to the cleaning blade.

According to a sixth aspect of the present invention, there is provided a cleaning device for cleaning a screen plate for use in screen printing, the device having a housing, a shaft having a plurality of cleaning blades rotatably disposed in and adjacent to the housing. First means for rotating the shaft such that an upper portion of the cleaning blade contacts the lower surface of the screen plate, a cleaning roller rotatably disposed on the housing so as to be pressed against the lower surface of the screen plate, each of the cleaning rollers and the screen plate A washing paper disposed directly between the lower surfaces of the washing paper, an outer surface of the washing roller, second means for moving the washing paper along a predetermined movement path, and third means for supplying solvent to the washing paper.

Other objects and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.

1 to 5 of the drawings, in particular with reference to FIG. 1, there is shown a screen cleaning apparatus 10A which is a first embodiment of the present invention.

As can be seen from FIG. 1, the apparatus 10A is disposed below the screen plate S of the screen printing printer. That is, as can be seen from the description described, when the printed base plate is removed from the print working position after completion of printing of a predetermined circuit pattern on the insulating base substrate (not shown), the cleaning apparatus 10A is raised to the illustrated working position. do. In this working position, the first, second and third cleaning blades 12a, 12b, 12c of the cleaning device 10A are pressed against the lower surface of the screen plate S at the top thereof as shown.

The first and second blades 12a and 12b have wet wipes 14 put on their tops, while the third blade 12c does not have wash papers 14 put on their tops. The cleaning device 10A moved forward and backward in the horizontal direction then moves the top of the cleaning blades 12b and 12c forward and backward on the bottom surface of the screen plate S. FIG. More specifically, the sliding movement of the first and second cleaning blades 12a, 12b on the screen plate S is carried out with the wet wash paper 14 introduced therebetween. The cleaning paper 14 is automatically supplied to the upper portions of the first and second cleaning blades 12a and 12b and automatically supplied with a cleaning solvent capable of dissolving the ink residues remaining on the screen plate S. That is, when the cleaning action is repeated at regular intervals, the cleaning paper 14 on the first and second cleaning blades 12a, 12b is a new cleaning portion of the cleaning paper 14 above the cleaning blades 12a, 12b. The feed direction is changed and the cleaning solvent is then supplied to a new wash section. Thus, during the slide motion, the first and second wash blades 12a and 12b wipe off the ink residue on the screen plate S by solvent, and the third wash blade 12c removes the ink residue. As described below, each of the first and second wash blades 12a, 12b is in the form of a double blade with two thin blade strips.

As shown in FIG. 1, the cleaning apparatus 10A includes a rectangular base substrate 16. Base substrate 16 extends in a direction perpendicular to the paper of FIG. On the base substrate 16, first and second rectangular housings 18, 20 are disposed. As shown, the first rectangular housing 18 has an inclined recess 18a on one lower side. The first housing 18 is detachably mounted on the base substrate 16, and the second housing 200 is firmly mounted on the base substrate 16. That is, when necessary, the first housing 18 can be simply operated. It can be easily separated from the base substrate 16.

In the first housing 18, a paper winding roller 24 is rotatably provided in which the paper feed roller 22 and its parallel axis extend along the longitudinal axis of the first housing 18. The washing paper 14 is wound on the paper feed roller 22 and supplied to the winding roller 24 therefrom as described below.

The pressure roller 26 biased to the right by the spring 28 of FIG. 1 is rotatably installed near the paper feed roller 22. The pressing roller 26 is pressed against the driving roller 30 rotatably installed in the second housing 20 as shown. The drive roller 30 has a cylindrical outer surface covered with a rubber sheath. In order to form a contact between the pressure roller 26 and the drive roller 30, an opening 32 is formed in the wall of the second housing 20 as shown. The drive roller 30 is driven in the direction of the arrow by the drive mechanism (shown in FIG. 3) described below.

The first housing 18 is formed in the upper wall with the long opening 18b. The long box 34 is installed in the first housing 18 so that the inside of the box 34 is exposed to the long opening 18b. The box 34 is detachably connected to the first housing 18 by a so-called one touch connector. In other words, the box 34 is easily separated from the first housing 18 when necessary. The elongated guide structure 36 is disposed in the elongate box 34 to form two blade holders that support the space. In two spaces, two blade holders 38a and 38b for holding the first and second blades 12a and 12b, respectively, are slidably installed. Springs 40a and 40b are disposed in their respective spaces to bias the blade holders 38a or 38b outwards, ie upwards in FIG. The balancing roller 42 is arranged between two blade holders 38a and 38b.

As shown, the washing paper 14 introduced from the paper feed roller 22 is inserted directly between the pressure roller 26 and the drive roller 30, and then the top of the second cleaning blade 18b and the balance roller 42. ) And the upper part of the first washing blade 12a and the paper winding roller 24. Thus, when the driving roller 30 is rotated in the direction of the arrow, the washing paper 14 is driven from the paper feeding roller 22 to the second washing blade 12b. The drive roller 30 is controlled to drive the wash paper 14 by a few millimeters for each rotation.

In order to drive the paper winding roller 24 and the balance roller 42 in the direction of the respective arrows, first and second drive belts 44 and 46 shown in phantom lines are used. The first drive belt 44 is operatively fed onto the shaft of the pressure roller 26, the shaft of the paper winding roller 24, and the four guide rollers 48, 50, 52, 54, and the second drive belt. 46 is operatively loaded on the shaft of the guide roller 50 and the balance roller 42. That is, when the pressure roller 26 is rotated due to the rotation of the drive roller 30, the first and second drive belts 44 and 46 are papers for pulling the cleaning paper 44 by the winding roller 24. Driven to rotate the take-up roller 24 and balance roller 42.

As described in detail below, the movement of the wash paper 14 along a predetermined path is intermittent.

As shown, the second housing 20 is formed in the upper wall with the long opening 20a. The long box 56 is installed in the second housing 20 so that the inside of the box 56 is exposed to the opening 20a. Similar to the case of box 34 described above, box 56 is detachably connected to second housing 20. The blade holder 58 holding the third cleaning blade 12c in the box 56 is slidably installed. The spring 60 is disposed in the box 56 to bias the blade holder 58 outward, ie above in FIG. 1. In the lower part of the second housing 20 (not shown) is formed a tubular connector 20b to which a pipe extending from the suction pump (not shown) is connected. That is, under the operation of the vacuum pump, the ink residues removed by the third washing blade 12c are immediately conveyed to the outside through the inside of the second housing 20.

As shown in FIG. 2, the first and second cleaning blades 12a, 12b are each two thin blade strips 12a-1, 12a-2 or 12b-1 arranged so as to have a thin gap therebetween. , 12b-2).

Each thin blade strip is made of steel. The thickness of the strip is between about 100 μm and 200 μm. Preferably, the strip protrudes from about 5 mm to 15 mm from the blade holder 38a or 38b.

A thin gap formed between the two thin blade strips is in communication with the solvent supply (not shown) via the hollow 62 and 64 of the blade holder 38a or 38b. In the illustrated embodiment, the tubes 62, 64 from the two blade holders 38a, 38b are connected to a common pipe 66 extending to the solvent feeder. The common pipe 66 is equipped with an electromagnetic valve 68 for selectively opening and closing the solvent flow passage formed therein. The connectors which allow the tubes 62 and 64 to be detachably connected to the hollow portions of the blade holders 38a and 38b are denoted by 70 and 72. Thus, when the electromagnetic valve 68 is operated to open the solvent flow passage under the operation of the solvent supply, a certain amount of solvent is injected externally from the first and second wash blades 12a, 12b. Thus, when such injection is performed with the wash paper 14 put on top of the blades 12a and 12b, the wash paper 14 is wetted with solvent.

Referring to FIG. 3, there is shown a drive mechanism for driving the drive roller 30 described above. 3 is a perspective view seen from the rear side of the cleaning apparatus 10A of FIG.

The drive mechanism includes a first air cylinder 74 mounted on a slider (not shown). The slider is made to move forward and backward with the cylinder 74. The cylinder 74 has a piston rod 74a whose upper end is connected to the base substrate 16 of the cleaning apparatus 10A. That is, when one working chamber of the cylinder 74 is filled with compressed air, the piston rod 74a pushes the washing device 10A to the working position described above (i.e., the position shown in FIG. 1). The shaft of the drive roller 30 is indicated by reference numeral 30a. One end of the drive lever 76 is connected to the shaft 30a via a one-way clutch 78. The other end of the drive lever 76 is pivotally connected to one end of the L-shaped rod 80 through which the other end is pivotally connected to the cylinder 74 via the pin 79. Thus, when the piston rod 74a protrudes upwards, the drive lever 76 is pivoted downward (ie, clockwise in FIG. 3) around the axis of the shaft 30a of the drive roller 30. However, due to the function of the one-way clutch 78, such downward pivoting of the drive lever 76 does not rotate the drive roller 30 in the paper drive direction. When the piston rod 74a is pulled into the cylinder 74 due to the activity of the other working chamber 74 of the cylinder 74, the drive lever 76 pivots upward (i.e. counterclockwise in FIG. 3). do. Due to the function of the one-way clutch 78, such piping movement of the drive lever 76 causes the drive roller 30 to rotate slightly in the paper drive direction.

The drive lever 76 is formed with a number of small openings 76a-76d that are engageable with the pin 79. That is, by connecting the L-shaped rod 80 to one of such openings 76a to 76d via the pin 79, the rotation pitch of the drive roller 30 can be changed or controlled.

In the following, the operation of the cleaning device 10A is described with reference to FIGS. 1, 2 and 3. For ease of understanding, the state where the printing operation by the rubber roller has just been completed will be described. Until this time, the washing apparatus 10A takes a standstill state. That is, in this stationary state, the slider on which the cleaning device 10A is mounted takes the rear stop position and the piston rod 74a of the air cylinder 74 pulled downward causes the cleaning device 10A to be in the lower stop position.

When the print job is completed, the printed base substrate is removed from the screen plate S. The air cylinder 74 then pushes the cleaning device 10A up to the working position shown in FIG. As described above, such upward movement does not rotate the drive roller 30 in the paper drive direction. Thus, the washing paper 14 remains stationary. For the reasons described below, the portion of the wash paper 14 put on top of the first and second wash blades 12a, 12b is a new wash portion of the paper 14. When the cleaning device 10A reaches the working position, the electromagnetic valve 68 is operated to open the passage for a predetermined short time. Due to this, a certain amount of solvent is injected from the cleaning blades 12a and 12b into the wet cleaning paper 14 put on the blade. The slider is then moved back and forth with the cleaning device 10A mounted thereon. Thus, the ink residue on the screen plate S is wiped off by the wet wipes 14 on the first and second wash blades 12a, 12b and removed by the third wash blade 12c. During this reciprocating movement of the cleaning device 10A, the suction pump connected to the inside of the second housing 20 is continuously operated. Therefore, the ink residue removed by the third washing blade 12c is immediately discharged to the outside via the inside of the second housing 20. When the slider returns to its original position, the air cylinder 74 pulls the cleaning device 10A downward from the working position. Due to this downward pull of the cleaning device 10A, the drive lever 76 connected to the shaft 30a of the drive roller 30 is pivoted upward. This upward pivoting of the drive lever 76 causes the drive roller 30 to rotate slightly in the paper drive direction as described above. Thus, the spot of the wash paper 14 put on the top of the first and second wash blades 12a, 12b is replaced by a new wash part of the wash paper 14, and the spot of the paper 14 is paper It is wound onto the winding roller 24 and finally wound on that roller. By adjusting the rotational pitch of the driving roller 30 and the distance of the movement path between the first and second cleaning blades 12a and 12b, the first cleaning blade 12a is introduced onto the second cleaning blade 12b. Input of the uneven | corrugated part of the washing paper 14 to the upper part is prevented.

When the above-described operation is completed, the cleaning device 10A takes the above-mentioned stop state or standby position for the next cleaning operation.

Subsequently, a modification of the above-described first embodiment 10A is described with reference to FIGS. 3 and 4. In this modification, instead of one cleaning blade 12c, two cleaning blades 12c-1 and 12c-2 that move like a seesaw are used.

That is, two cleaning blades 12c-1 and 12c-2 are mounted on the seesaw structure as shown in FIG. That is, these blades are mounted on pivot plate 82 which is held on pivot shaft 84 via a blade holder (not shown). As shown in FIG. 3, the pivot shaft 84 is pivoted by an air mechanism. Its mechanism is an air cylinder 90 having a pinion 86 fixed to a pivot shaft 84, a rack 88 having a pinion 86 engaged therewith, and a piston rod 90a connected to the rack 88. It includes. Thus, when the rack 88 is moved downward as shown due to the on / off operation of the air cylinder 90, the pinion 86 rotated counterclockwise in FIG. 3 raises the cleaning blade 12c-3. Extrude On the other hand, the pinion 86 rotated in the clockwise direction when the rack 88 is moved upward, protrudes the other cleaning blade 12c-2 upward. Therefore, in this modification, the cleaning blades 12c-1 or 12c-2 adjacent to the screen plate S can be changed according to the direction of movement of the slider. That is, for example, the cleaning blades 12c-2 are lifted for cleaning purposes when the slider moves forward, while the other cleaning blades 12c-1 are lifted when the slider moves backward.

If necessary, these two cleaning blades 12c-1 and 12c-2 are supplied with cleaning solvent. That is, in this case, as indicated by the break line, the solvent injection pipe 92 extends between the two cleaning blades 12c-1, 12c-2. To supply solvent to the inlet pipe 92, a tube 94 extending from the solvent tank (not shown) is connected to the pipe 92. The tube 94 has an electromagnetic valve operatively connected thereto, and the solvent tank is pressed. When the valve opens the tube 94, a predetermined amount of solvent is supplied to the injection pipe 92 and the two cleaning blades 12c-1 and 12c-2.

Referring to FIG. 5, a screen cleaning device 10B is shown, which is a second embodiment of the present invention.

Since the second embodiment 10B is similar in structure to the above-described first embodiment 10A, only parts and structures different from the first embodiment 10A will be described in detail for convenience of description. In fact, the same parts and structures as those of the first embodiment 10A are denoted by the same reference numerals. In FIG. 5, the slider on which the air cylinder 74 is mounted is shown by reference numeral 100.

In the second embodiment 10B, only one cleaning blade 12d whose upper part is covered with the washing paper 14 and two cleaning blades 12c-1, whose upper part directly contact the screen plate S, 12c-2) is used. No solvent wetting wash paper 14 is used. The cleaning blade 12d is upwardly biased by a spring 104 that is movably held in the bin 102 and is retained in the bin 102. For the same reasons described in the first embodiment, the box 102 is detachably connected to the first housing 18. The cleaning blade 12d is one type. Two cleaning blades 12c-1 and 12c-2 are mounted on the seesaw structure described above. The solvent injection pipe 92 is disposed between the two blades 12c-1 and 12c-2 to supply solvent to the blades.

In operation, a similar exercise to that of the first embodiment 10A described above is performed by the cleaning device 10B. That is, the ink residue on the screen plate S during the cleaning operation is applied to the two cleaning blades 12c-1 and 12c-2 wiped by the dry cleaning paper 14 on the cleaning blade 12d and moistened with solvent. Is removed. The uneven part of the washing paper thrown on the top of the cleaning blade 12d is finally wound up by the paper winding roller 24 by the roller. Ink residues peeled off by the two wet cleaning blades 12c-1 and 12c-2 are immediately discharged to the outside through the inside of the second housing 20.

If necessary, the following modifications are used for the second embodiment.

As shown in FIG. 6A, the cleaning blade 12d includes three thin blade strips 12d-1, 12d-2, 12d-3. In this case, the washing paper 14 can be pressed much more stably against the screen plate S. As also shown in FIG. 6B, at least one of the two cleaning blades 12d-1 or 12d-2 includes three thin blade strips (without reference numerals).

7 and 8, there is shown a screen cleaning apparatus 10C as a third embodiment of the present invention.

As can be seen from FIG. 7, the cleaning device 10C includes an elongated housing 106 having sidewalls 108, 110. In the front upper part of the housing 106 is disposed a cleaning blade 112 which is slightly inclined with respect to the screen plate S to be cleaned. Each sidewall 108 or 110 is formed with three slots 114, 116, 118 extending vertically. Within the slot 114 of the sidewalls 108, 110 there is a rotatably installed drive shaft 120 having an asterisk cross section as shown in the main part thereof. The apex of the drive shaft 120 is covered with a rubber material. In addition, there is a rotatably mounted pressure roller 121 disposed on the drive shaft 120 in the slot 114. Within the slots 116, 118 of sides 108, 110 there are respective guide rollers 122, 124 rotatably installed. Infinite wash paper 14 is fed around the cleaning blade 112, the pressure roller 121, and the two guide rollers 122, 124 as shown in the figure. The washing paper 14 has a portion directly inserted between the driving roller 120 and the pressure roller 121. At least one guide roller 122, 124 is held apart from the base of the corresponding slot 116 or 118 such that an appropriate tension is applied to the wash paper 14 by the weight of the guide roller.

Thus, when the drive shaft 120 is rotated by a predetermined small angle in the direction of arrow a due to the operation of the drive mechanism described below, the washing paper 14 is slightly moved in the direction of the arrow b, that is, on the cleaning blade 112. The stain portion of the washing paper 14 to be put into is replaced with a new washing portion of the paper 14.

The drive mechanism is shown in FIG. The drive mechanism includes an air cylinder 74 having a slider 100 that can move forward and backward and a piston rod 74a that supports the cleaning device 10C. The exposed shaft of the drive roller 120 is fixed to one end of the drive lever 76 via a one way clutch. The other end of the drive lever 76 is pivotally connected to the stand 80 fixed to the air cylinder 74. Therefore, when the piston rod 74a is pulled downward for the reasons described above, the drive roller 120 is rotated by a predetermined small angle in the paper direction.

Referring to FIG. 9, there is shown a screen cleaning device 10D which is a fourth embodiment of the present invention.

The cleaning device 10D includes a rectangular housing 126. In the housing 126, there are rotatably installed paper feeding rollers 22 and paper winding rollers 24 spaced apart from each other as shown. The cleaning roller 128 is disposed near the paper feed roller 22, and larger and smaller guide rollers 130, 132, 134 are rotatably disposed between the cleaning roller 128 and the winding roller 24. As shown, the wash paper 14 provided from the feed roller 22 is fed on the upper surface of the cleaning roller 128, the lower surface of the smaller guide roller 132 and the upper surface of the larger guide roller 134. The paper winding roller 24 is then directed to the paper winding roller 24 via the paper driving mechanism described below.

The paper drive mechanism includes first and second units 136, 138 used to drive the cleaning paper 14 toward the paper winding roller 24.

The first unit 136 includes a base plate 140 pivotally connected to the housing 126. The air cylinder 142 is disposed on the base plate 140 having a piston rod (not shown). The drive roller 30 is rotatably mounted on the base plate 140. The piston rod of the air cylinder 142 is pivotally connected to one end of the drive lever 76 and the other end thereof is connected to the shaft of the drive roller 30 through the one-way clutch 78. Thus, when the piston rod protrudes from the cylinder 142 or is pulled into the cylinder 142, the pivoting movement of the drive lever 76 rotates the drive roller 30 by a predetermined small angle in the paper drive direction. When in use, the drive roller 30 takes the working position shown in solid lines. When not in use, the base plate 140 pivots upward to place the drive roller 30 in the rest position shown by the phantom line.

The second unit 138 includes a pressure roller 26 which is rotatably disposed near the paper winding roller 24 and biased upward by the spring 143 as shown. The gear 144 meshing with the gear 146 formed on the winding roller 24 is connected to the pressure roller 26 through the endless drive belt 148. Two smaller guide rollers (without reference numerals) are used to guide the drive belt 148. Therefore, when the pressure roller 26 is rotated in the predetermined direction, the paper winding roller 24 is rotated in the paper winding direction.

A braking rod having a brake shoe 152 at one end thereof operatively engaged with the paper feed roller 22 is designated by reference numeral 150. The other end of the braking rod 150 is pivotally connected to the piston rod of the air cylinder 142.

When in use, the first unit 136 takes the illustrated working position to press the drive roller 30 against the pressure roller 26 with the wash paper 14 directly inserted therebetween.

Subsequently, the operation of the cleaning device 10D is briefly described. Although not shown in the figures, two means corresponding to the slider 100 (shown in FIG. 5) and the air cylinder 74 (shown in FIG. 5) are also used in the fourth embodiment. That is, the cleaning device 10D takes its lower stop position until the printing operation is completed by the rubber roller.

When the print job is completed, the cleaning device 10D is lifted up to the work position. In this way, the air cylinder 142 of the first unit 136 rotates the driving roller 30 by a predetermined angle, and drives the washing paper 14 toward the winding roller 24 by a predetermined length. Rotation of the drive roller 30 rotates the pressure roller 26 and also rotates the winding roller 24 in the paper winding direction. Thus, a predetermined length of the washing paper 14 is wound by the winding roller 24. Due to the movement of the cleaning paper 14, the spot of the paper 14 on the cleaning roller 128 is replaced by a new cleaning part.

When the cleaning device 10D is in the working position, the slider moves back and forth to press the cleaning roller 128 against the screen plate S together with the cleaning paper 14 interposed therebetween. Thus, the screen plate S is washed by the cleaning device 10D.

When the above-described operation is completed, the cleaning device 10D is in the stop position or the standby position described above for the next cleaning operation.

Subsequently, the modified example 10D of the sixth embodiment is described with reference to FIGS. 9 to 11.

That is, in this embodiment the cleaning blade 154 of FIG. 9 is used in place of the cleaning roller 128. The cleaning blade 154 is held by the blade holder 154a. As shown in FIG. 9, the box 156 is detachably installed in the housing 126 to hold the blade holder 154a.

10A, 10B, 12A, and 12B illustrate how the cleaning paper 14 or the cleaning blade 154 on the cleaning roller 128 treats the ink residue on the screen plate S. FIG.

In the case of FIGS. 10A and 12A, a conventional washing paper 14 is used, while in the case of FIGS. 10B and 12B, an improved uneven paper 14 is used. As shown, when the improved stained paper 14 is used, the paper efficiently collects ink residues.

13 to 15, there is shown a screen cleaning apparatus 10E as a fifth embodiment of the present invention.

Since the sixth embodiment 10E is similar in structure to the above-described second embodiment 10B, only components and structures different from the second embodiment 10B will be described in detail for the convenience of description. In fact, the same parts and structures as those of the second embodiment 10B are indicated by the same reference numerals.

In the sixth embodiment 10E, power transmission from the drive roller 30 to the take-up roller 24 takes place via gears and belts, and the seesaw movement of the two cleaning blades 12c-1 and 12c-2 This is accomplished by using the rack and pinion described below.

That is, the gear 26a is formed in the pressure roller 26 driven by the drive roller 30 as shown in FIG. Gear 158 meshes with gear 26a and another gear 160. The pulley 160a is formed in the gear 160. The endless belt 162 is put on the pulley 160a and the shaft of the winding shaft 24. Therefore, when the pressure roller 26 is rotated in the predetermined direction due to the rotation of the drive roller 30, the winding roller 24 is rotated in the paper winding direction.

As shown in FIG. 13, two cleaning blades 12c-1 and 12c-2 are provided with respective racks 164 and 166 with smaller pinions 168 in between. As shown in FIG. 15, the smaller pinion 168 is driven by the larger interlocking pinion 86 of the rack 88. The rack 88 is driven by the piston rod 90a of the air cylinder 90. Thus, when the piston rod 90a is pushed up or pulled down, the smaller pinion 168 that is rotated causes the seesaw motion of the two cleaning blades 12c-1, 12c-2.

Although not shown in FIG. 13, the solvent supply means corresponding to the solvent injection pipe 92 of the second embodiment (FIG. 5) is used with two cleaning blades 12c-1 and 12c-2.

16 and 17, there is shown a screen cleaning apparatus 10F as a sixth embodiment of the present invention.

The cleaning device 10F includes a rectangular housing 170 formed on its upper wall with a rectangular opening 170a. Within the housing 170, a shaft 172 is installed, the axial end of which is rotatably supported by both longitudinal walls of the housing 170. The plurality of cleaning blades 174 are disposed around the shaft 172 at evenly spaced intervals.

As shown in FIG. 17, the cleaning blade 174 protrudes from the opening 170a of the housing 170 when it reaches its upper position.

As shown in FIG. 16, one axial end of the shaft 172 has an extension 172a exposed outward from the longitudinal wall of the housing 170. Pulley 176 is fixed coaxially to extension 172a to rotate with it. The holder plate 178 is fixed to the longitudinal wall of the housing 170 to mount the electric motor 180 thereon. The output shaft (unlabeled) of the motor 180 is equipped with a pulley 182. Infinite belt 184 is actuated on two pulleys 182 and 176. Thus, when the electric motor 180 is operated, the blade mounting shaft 172 is rotated at a predetermined speed.

As shown in FIG. 17, a rectangular cross sectional pipe 186 is installed in the housing 170 below the blade mounting shaft 172. Two elastically deformable strips 188a, 188b are mounted on the pipe 186 such that a thin gap formed between the strips 188a, 188b communicates with the interior of the pipe 186. As shown, the two strips 188a, 188b have a top that is in contact with the cleaning blade 172 of the shaft 172. A pipe 190 extending from the solvent supply (not shown) is connected to the pipe 186 to supply solvent inside the pipe 186. A tube connector to which a tube (not shown) extending from the suction pump is connected is indicated by reference numeral 20b.

The operation of the washing apparatus 10F is described below. Although not shown in the figures, two means corresponding to the slider 100 (shown in FIG. 5) and the air cylinder 74 (shown in FIG. 5) are also used in the sixth embodiment.

When the cleaning device 10F is lifted up to the working position shown in FIG. 17, the suction pump is operated and the electric motor 180 drives the blade mounting shaft 172. At the same time, the solvent feeder is operated to inject the solvent from the gaps of the strips 188a, 188b. Thus, the cleaning blade 174 removes ink residues remaining on the screen plate S at high speed. During rotation of the blade mounting shaft 172, the cleaning blade 174 collides with the strips 188a, 188b such that any ink residues remaining on the cleaning blade 174 are dispersed into the housing 170. Separation of the ink residue from the cleaning blade 174 is facilitated by the solvent provided therein from the gaps of the strips 188a, 188b. The ink residue is then discharged out of the housing 170 due to the operation of the suction pump.

If necessary, the following modifications are used for the sixth embodiment 10F.

That is, in the modification the wash paper driven by the appropriate drive mechanism is put on top of the strips 188a, 188b.

18A, 18B, 21, 22, and 23, there is shown a screen cleaning apparatus 10G, which is a seventh embodiment of the present invention.

As can be seen from FIG. 18A, the cleaning device 10G includes a container 192. On top of the container 192, a blade mounting shaft 172 is rotatably disposed. An elastically deformable strip 194 held by the blade holder 194a is installed in the container 192 below the shaft 172. Two cleaning rollers 195a, 195b are disposed on top of the container 192, and each sagger roller 195a, 195b is biased upward by springs 199a, 199b in the manner shown in FIG. do. Two larger guide rollers 196a, 196b and two smaller guide rollers 198a, 198b (shown in FIG. 18A) are rotatably disposed below the interior of the container 192 as shown. Infinite wash paper 14 is fed in the manner shown on these six rollers. The cleaning solvent L is stored in the container 192 to wet the wash paper 14. A tube 200 extending from a solvent supply (not shown) is connected to the bottom of the vessel 192.

As shown in FIG. 18B, the blade mounting shaft 172 and the two larger guide rollers 196a, 196b have extensions exposed to the outside of the container 192. The extension has respective gears or pulleys 202, 204, 206 fixed thereto. Infinite toothed belts 208 are put on these three gears 202, 204, 206 in the manner shown. Thus, for example, when the gear 202 is rotated, the blade mounting shaft 172 is rotated and the wash paper 14 is driven in a certain direction with the solvent sucked therein.

As shown in FIG. 21 and FIG. 23, the extension in which the gear 202 is arranged is driven by the drive mechanism D driven by the electric motor 180. As shown in FIG.

As best shown in FIG. 23, the drive mechanism D includes a first gear 310 disposed on an extension of the blade mounting shaft 172. The second gear 312 disposed on the first shaft 314 meshes with the first gear 310. The first shaft 314 is rotatably supported by the support walls 313 and 315. The third gear 316 disposed on the first shaft 314 meshes with the fourth gear 318 disposed on the second shaft 320. The second shaft 320 is rotatably disposed by the support wall 315 and the fifth gear 322 is disposed thereon.

As shown in FIG. 21, the fifth gear 322 meshes with a sixth gear 324 rotatably supported by walls 315 and 326. The sixth gear 324 meshes with the seventh gear 328 disposed on the output shaft of the electric motor 180. The motor 180 is mounted on the support plate 330 fixed to the container 192. Thus, the power generated by the motor 180 when the electric motor 180 is actuated is transmitted to the gear 202 of the blade mounting shaft 172 via the gear train of the aforementioned gear.

Referring to FIG. 19, there is shown a screen cleaning device 10H, which is an eighth embodiment of the present invention.

Since this embodiment 10H is similar in structure to the seventh embodiment 10G described above, only different portions are described below.

That is, instead of the solvent L used in the seventh embodiment 10G in this embodiment 10H and embedded in the container 192, the container 192 for spraying the cleaning solvent on the lower surface of the screen plate S. Two solvent spray nozzles 210, 212 located in the front and rear positions of the < RTI ID = 0.0 > These nozzles 210 and 212 are connected to a solvent supply (not shown) via an electromagnetic valve 214. Thus, when the valve 214 is operated to open its passage, an appropriate amount of solvent is injected from the nozzles 210 and 212 to the screen plate S.

Referring to FIG. 20, there is shown the screen cleaning apparatus 10I of the ninth embodiment of the present invention, which is a modification of the seventh embodiment 10G described above (shown in FIG. 18A).

In this modification 10I, two cleaning blades 12a and 12b are used in place of the cleaning rollers 195a and 195b of the seventh embodiment 10G. Each cleaning blade 12a or 12b has two thin blade strips 12a-1, 12a with a thin gap formed therebetween, as in the case of the first embodiment 10A described above (shown in FIG. 2). -2 or 12b-1, 12b-2). The cleaning blades 12a, 12b are held by respective blade holders 38a, 38b which are biased upwards by respective springs 40a, 40b. The balance roller 42 is disposed between two cleaning blades 12a and 12b. The thin gap formed by each of the cleaning blades 12a or 12b communicates with a solvent supply (not shown) through the cavity blade holders 38a or 38b. The washing paper 14 is loaded on the two cleaning blades 12a and 12b and the balance roller 42 in the manner shown.

24 through 30, there is shown a washing apparatus 10J which is a tenth embodiment of the present invention.

Since this embodiment 10J is similar in structure to the above-described fifth embodiment 10E in FIG. 13, only parts and structures different from the fifth embodiment 10E are described in detail below for convenience of description. In fact, the same parts and structures as those of the fifth embodiment 10E are denoted by the same reference numerals.

As can be seen from FIG. 24, in this tenth embodiment 10J, rollers disposed on the base substrate 16 next to the second housing 20 in addition to all the parts of the cleaning apparatus 10E of the fifth embodiment. The mold cleaning apparatus 300 is further used.

The roller-type cleaning mechanism 300 includes a rectangular elution 302 containing a predetermined amount of cleaning solvent. In the container 302, upper and lower rollers 304 and 306 are provided which are held in rotation by the retaining structure 308 as shown in FIG. Loop type wash paper 310 is fed around the upper and lower rollers 304, 306. Thus, when the upper roller 304 is rotated, the lower roller 306 is also rotated due to the operation of the looped washing paper disposed therebetween. Lower roller 306 is introduced into the solvent as shown in FIG.

The air cylinder 312 is inserted between the base substrate 16 and the container 302. That is, the piston rod 312a of the cylinder 312 puts the container 302 on it. Thus, in operation of the air cylinder 312, the container 302 is shown with the upper roller 304 pressed against the bottom surface of the screen plate S together with the washing paper 310 directly inserted therebetween. The upper roller 304 is moved upward to the lower position or the lower position separated from the screen plate S.

25 shows the upper and lower rollers 304, 306 in detail. As shown in the figure, the lower roller 306 is barrel shaped and the upper roller 304 is cylindrical.

FIG. 26 shows a mechanism for adjusting the distance between the upper and lower rollers 304,306. The mechanism includes a holder 314 by which the lower roller 306 is rotatably held. The holder 314 is moved vertically upwards or downwards when the bolt 316 is turned clockwise or counterclockwise within a screw hole (unsigned) formed in the protrusion 308a of the retaining structure 308. The stopper bolt turning in the screw hole to fix the bolt 316 is indicated by reference numeral 318.

27 and 28 show a bearing mechanism for rotatably supporting the upper roller 304 (or lower roller 306). As shown, the bearing mechanism includes a first sheet 320 tightly held in the bore of the upper roller 304, a second sheet 322 tightly held by the holding structure 308, and a first sheet and a second sheet ( And a ball bearing 324 directly inserted between 320 and 322. As shown in FIG. 28, the first and second seats 320 and 322 each have a threaded portion that rotates within the threaded bore, thereby rotating the axial position or holding structure 308 relative to the roller 304 due to its rotation. You can adjust it.

Referring to Figures 29 and 30, a mechanism for pivoting two cleaning blades 12c-1, 12c-2 is shown. As shown, the two cleaning blades 12c-1, 12c-2 have a rack 164 on which the pinion 168 is operatively arranged. Thus, when the pinion 168 is rotated in one direction, one of the cleaning blades 12c-1 and 12c-2 protrudes upward and the other is pulled downward. This mechanism is also used in the fifth embodiment 10E of FIG. 13 described above.

The present invention is described with reference to the specific embodiments thereof, but it is not limited because the changes and modifications are made within the scope of the present invention as defined by the appended claims.

Claims (50)

A screen apparatus for cleaning screen plates used for screen printing, comprising: a base structure that can be disposed directly below the screen plate, and attached to the base structure, the base structure in a direction parallel to the main surface of the screen plate. First means having a contact portion in contact with the lower surface of the screen plate to wipe off foreign matter from the lower surface through the cleaning paper when moved, and provided in the first means, the lower portion when the base structure is moved in the direction And at least one thin blade having an upper portion that is pressed directly against the lower surface of the screen plate to wipe off foreign matter from the surface. The cleaning apparatus as claimed in claim 1, wherein the first means includes a pressing member having a portion pressed against the bottom surface of the screen plate to wipe off foreign matter from the bottom surface of the screen plate. 3. The cleaning apparatus of claim 2, wherein the first means is configured to move the washing paper along a predetermined movement path including a washing paper directly inserted between an upper portion of the pressing member and a lower surface of the screen plate, and an upper portion of the pressing member. The washing apparatus further comprising a washing paper drive mechanism. 4. The washing apparatus of claim 3, wherein the washing paper driving mechanism includes means for performing intermittent movement of the washing paper. 5. A cleaning device as claimed in claim 4, wherein said urging member is a thin blade or roller. The washing apparatus as set forth in claim 4, wherein the washing apparatus is a solvent supply means for supplying a solvent to the washing paper. The cleaning apparatus according to claim 1, further comprising suction means for conveying the foreign matter removed by the thin blade to the outside by suction force. 3. The rotating member of claim 2, wherein the urging member includes a rotating shaft having a plurality of cleaning blades disposed around and having a top contactable with a lower surface of the screen plate, and means for rotating the rotating shaft. Washing device. 9. The cleaning apparatus of claim 8, wherein said first means further comprises solvent supply means for supplying solvent to said cleaning blade. 10. The cleaning apparatus according to claim 9, wherein said first means further comprises an elastically deformable strip which repeatedly contacts said cleaning blade when said rotating shaft is rotated. The cleaning apparatus according to claim 10, wherein the first means further comprises suction means for conveying the foreign matter removed from the cleaning blade to the outside by suction force. 9. The washing machine according to claim 8, wherein the first means includes a washing roller pressed against the lower surface of the screen plate, a washing paper directly inserted between each of the cleaning rollers, and a lower surface of the screen plate, and an outer cylinder of the washing roller. And a cleaning paper drive mechanism for moving the cleaning paper along a predetermined movement path. 13. The cleaning apparatus of claim 12, wherein the first means further comprises solvent supply means for supplying solvent to the wash paper. 14. The cleaning apparatus of claim 13, wherein said first means further comprises an elastically deformable strip that contacts said cleaning blade of said rotating shaft when said rotating shaft is rotated. 9. The cleaning device as set forth in claim 8, wherein the first means comprises a cleaning blade having an upper portion pressed against the lower surface of the screen plate, a washing paper and the cleaning blade directly inserted between each of the upper portion and the lower surface of the screen plate. And a washing paper drive mechanism for moving the washing paper along a predetermined movement path. 16. The cleaning apparatus of claim 15, wherein said first means further comprises solvent supply means for supplying solvent to the wash paper. 17. The cleaning apparatus of claim 16, wherein said first means further comprises an elastically deformable strip that contacts said cleaning blade of said rotating shaft when said rotating shaft is rotated. 5. A slider as claimed in claim 4, further comprising a slider for moving the base structure in a direction parallel to the major surface of the screen plate, and a lifter arranged to change the distance between the slider and the base structure. Washing device. 19. The cleaning apparatus according to claim 18, wherein the lifter includes an air cylinder having a piston rod and means for connecting the piston rod to the base structure. 20. The cleaning apparatus as claimed in claim 19, wherein the cleaning paper drive mechanism is driven by the air cylinder. 21. The washing paper driving mechanism according to claim 20, wherein the washing paper driving mechanism includes a driving roller and a pressure roller pressed against the driving roller with a portion of the washing paper directly inserted therein, the driving lever, and the driving roller being one of the driving levers. A pressure roller for connecting to an end, a drive lever, a one-way clutch for connecting the drive roller to one end of the drive lever, one end pivotally connected to the air cylinder, and the other end to the other side of the drive lever. And a rod pivotally connected to the end. 22. The cleaning apparatus according to claim 21, wherein the drive lever is formed with a plurality of openings to which the other end of the rod can be selectively connected. A cleaning device for cleaning a screen plate for use in screen printing, the cleaning device comprising: a base structure that can be disposed directly below the screen plate, and at least one cleaning blade whose upper portion is pressed against the lower surface of the screen plate; A unit for detachably connected to a base structure, a washing paper directly inserted between an upper portion of the washing blade and a lower surface of the screen plate, and a washing for moving the washing paper along a predetermined movement path including an upper portion of the washing blade A support drive mechanism, solvent supply means for supplying solvent to the wash paper, an auxiliary cleaning blade having an upper portion attached to the base structure and pressed directly against the bottom surface of the screen plate, and the base structure of the screen plate. Three moving means for moving in a direction plain to the surface Device. 24. The cleaning apparatus of claim 23, wherein said unit comprises two cleaning blades, the upper portion of which is pressed against the lower surface of the screen plate. 25. The apparatus of claim 24, wherein the unit further comprises a box detachably connected to the base structure for movably receiving the cleaning blade, and a spring installed in the box to bias the cleaning blade toward the screen plate. Washing device comprising a. 25. The cleaning apparatus of claim 24, wherein said solvent supply means comprises means for forming a solvent injection gap formed in each said cleaning blade, and means for communicating said solvent injection gap to a solvent supply. 27. The cleaning apparatus of claim 26, wherein each said cleaning blade comprises two thin blade strips disposed therebetween to form said solvent injection gap. 24. The washing paper driving mechanism according to claim 23, wherein the washing paper driving mechanism includes a driving roller having an outer cylindrical surface covered with rubber, a pressure roller pressurized with the washing paper pressed tightly between the driving roller, and a washing paper thereon. And a pouch roller for raising, a drive belt to which the pressure roller and the winding roller are connected, and a pneumatic drive mechanism for intermittently driving the drive roller. 29. The pneumatic drive mechanism according to claim 28, wherein the pneumatic drive mechanism includes an air cylinder having a piston rod, a drive lever having one end, a one-way clutch through which the drive roller is connected to one end of the drive lever, and the cylinder. And an L-shaped rod having one end pivoted and the other end pivoted to the other end of the drive lever. 24. The cleaning apparatus of claim 23, further comprising two cleaning blades operated by pneumatic mechanisms to selectively protrude. 31. The pneumatic mechanism of claim 30, wherein the pneumatic mechanism is connected to and moved together with a plate on which the two auxiliary cleaning blades are mounted, a pivot shaft mounted to pivot together on the plate, an air cylinder having a piston rod, and the piston rod. And a pinion engaged with the rack and coaxially connected with the pivot shaft. 32. The cleaning apparatus of claim 31, further comprising solvent supply means for supplying solvent to two auxiliary cleaning blades. CLAIMS 1. A cleaning device for thinning a screen plate used for screen printing, comprising: a rectangular housing, a cleaning blade mounted on an upper portion of the rectangular housing and inclined with respect to the screen plate, and a first extending vertically in both sidewalls of the housing; Means for forming second and third slots, a drive shaft rotatably housed in the first slot and having a star cross section, and rotatably housed in the first slot and loaded onto the drive shaft. A pressure roller, two guide rollers rotatably received in the second and third slots, respectively, on the upper part of the cleaning blade and on the pressure roller and the two guide rollers, some of which are driven between the drive shaft and the pressure roller. Washing device comprising an endless washing paper directly injected. 34. The cleaning apparatus of claim 33, wherein one of the two guide rollers is received in a corresponding slot to apply a constant tension to the cleaning paper. A washing apparatus for cleaning a screen plate used for screen printing, comprising: a rectangular housing, a paper feed roller operatively installed in the housing, a paper winding roller operatively installed in the housing at a position away from the paper feed roller, and the paper feed roller. A pressing member pressed against the lower surface of the screen plate together with the washing paper extending to the winding roller, the washing paper installed on the housing and directly inserted therebetween, a base substrate pivotally connected to the housing, and the base substrate. An air cylinder mounted on the base, a drive roller mounted on the base substrate and driven by the air cylinder, a pressure roller rotatably installed in the housing, and means for transmitting rotation of the pressure roller to the winding roller; The drive rollers push in between when the base substrate is pivoted to a constant working position. Washing apparatus, characterized in that pressed against the pressure roller with the cleaning paper is added. 36. The cleaning apparatus of claim 35, wherein the urging member is a cleaning roller rotatably mounted on the housing or a cleaning blade fixedly mounted on the housing. 37. The cleaning apparatus according to claim 36, further comprising braking means for suppressing rotation of the paper feed roller by the power of the air cylinder. A cleaning device for cleaning a screen plate for use in screen printing, the cleaning device comprising: a shaft having a housing, a plurality of cleaning blades rotatably disposed in and disposed around the housing; And first means for rotating the shaft so as to contact a lower surface of the second means, and second means for supplying solvent to the cleaning blade. The apparatus of claim 38, wherein the first means comprises: a first pulley connected to the shaft, an electric motor having an output shaft, a second pulley connected to the output shaft, and the first and second pulleys. Washing apparatus comprising an endless belt that is put into operation. 40. The apparatus of claim 39, wherein the second means comprises: a pipe installed in the housing immediately below the shaft, and an upper portion mounted on the pipe such that a thin gap formed between the strips communicates with the interior of the pipe and is in contact with a cleaning blade. Two elastically deformable strips having a; and a pipe connecting the inside of the pipe to a solvent supply. 41. The cleaning apparatus as set forth in claim 40, further comprising suction means for forcibly discharging foreign substances in the housing to the outside of the housing by suction force. A cleaning device for cleaning a screen plate for use in screen printing, the cleaning device comprising: a housing, a shaft rotatably disposed in the housing, a plurality of cleaning blades disposed in the vicinity thereof, and an upper portion of the cleaning blade at a lower surface of the screen plate. First means for rotating the shaft so as to be in contact with the swivel, and a wash roller rotatably disposed on the housing so as to be pressed against the bottom face of the screen plate and a wash disposed directly between each wash roller and the bottom face of the screen plate And second means for moving the wash paper along a predetermined movement path including the outer surface of the wash roller, and third means for supplying solvent to the wash paper. 43. The cleaning device of claim 42, wherein said second means is rotatably disposed within said housing and comprises a plurality of guide rollers for guiding movement of said wash paper. 44. The cleaning apparatus of claim 43, wherein said third means comprises means for supplying solvent into the interior of said housing in an amount such that a portion of said guide roller is submerged in solvent. 45. The cleaning device of claim 44, further comprising an elastically deformable strip installed in the housing and having an upper portion that the cleaning blades of the shaft repeatedly contact when the shaft is rotated. 46. The apparatus of claim 45, wherein the first means comprises: a first pulley disposed on an extension of the shaft, a second pulley disposed on an extension of at least one guide roller, and an extension of the shaft. A gear train comprising a last gear disposed and a first gear, an electric motor having an output shaft, a gear disposed on the output shaft and engaged with the first gear via an intermediate gear, the first and second Washing apparatus comprising an endless belt that is put into operation on the pulley. 7. The apparatus of claim 6, further comprising a roller-type cleaning mechanism attached to the base structure, the apparatus rotating by the support structure, a container in which a predetermined amount of cleaning solvent is embedded, a support structure installed in the container, and the support structure. A lower roller, possibly supported and one of them, includes upper and lower rollers introduced into the cleaning solvent, and loop-type cleaning paper injected around the upper and lower rollers, and when the base structure is moved upward to a certain working position. And the upper roller is pressed against the lower surface of the screen plate with a portion of the washing paper directly inserted therebetween. 28. The cleaning apparatus according to claim 27, wherein the upper roller is cylindrical and the lower roller is barrel type. 49. The cleaning apparatus of claim 48, wherein each of the upper and lower rollers is supported by the support structure through a ball bearing. 48. The cleaning apparatus of claim 47, further comprising an air cylinder having a piston rod inserted between the base structure and the vessel and supporting the vessel.