KR20150071077A

KR20150071077A - Stamp device of paper

Info

Publication number: KR20150071077A
Application number: KR1020130157316A
Authority: KR
Inventors: 안병만; 이동식; 정의학; 이우호
Original assignee: 노틸러스효성 주식회사
Priority date: 2013-12-17
Filing date: 2013-12-17
Publication date: 2015-06-26

Abstract

A stamping device for a sheet of paper capable of preventing the occurrence of curl generated during printing of paper is introduced.
The stamping apparatus includes a main body for providing a path through which the paper is fed, a coating unit for stamping the paper to be transferred, and a damping unit arranged to face the coating unit to support the paper to be stamped, And the coating unit may include a stamper for printing a coating on the paper and a support pin spaced apart from the edge of the stamper so as to elastically support the paper.

Description

STAMP DEVICE OF PAPER [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a stamping apparatus for a sheet of paper, and more particularly, to a stamping apparatus for a sheet of paper capable of preventing the sheet from flowing through a support pin during printing,

In general, the stamping device is a device that enables serial numbers, stamps, or stamps to be stamped on paper such as banknotes, cashier's stamps, election ballots, test covers, bond papers, securities papers,

Such a stamping apparatus can stamp the paper by rolling the stamping roller through the stepping motor, or can stamp the paper by using the solenoid which is lifted and lowered by the operation of the actuator.

For example, in the case of a stamping device used in a cashier, such as a bank, a stamp can be stamped by lifting a stamp face stamped with a specific phrase or symbol while temporarily stopping the paper being conveyed along a specific path.

However, when stamping the paper by vertically moving the stamp surface while the paper is temporarily stopped, stamping is performed in a state in which the paper is not properly supported, so that it may be difficult to print a clear coating on the paper.

Patent Document: Korean Patent Laid-Open Publication No. 2001-0096472 (published on November 11, 2001)

Embodiments of the present invention are intended to provide a stamping apparatus for a paper capable of improving the print quality of the paper.

According to an aspect of the present invention, there is provided an image forming apparatus comprising: a main body for providing a movement path through which a sheet is fed; And a damping unit arranged to face the coating unit to support the paper to be stamped, wherein the coating unit and the damping unit are installed so as to be movable in a vertical direction of the main body And a stamping unit, wherein the stamping unit comprises: a stamper for printing a stamp on the sheet; And a plurality of support pins spaced apart from the edge of the stamper to elastically support the sheet.

At this time, the damping unit includes a soft damper for supporting a back surface of the paper to be printed by the stamper; And a hard damper provided on an edge side of the soft damper to support the back surface of the paper to which the end of the support pin is contacted.

The supporting pins may be disposed symmetrically with respect to the center of the stamper in the circumferential direction on the edge side of the stamper.

Also, the hard damper may be made of a material having a harder strength than the soft damper.

Further, the stamping unit may include a lower support positioned below the movement path and in which a coating slot in which the coating part is mounted is formed; An upper support positioned above the movement path and having a damping slot to which the damping portion is mounted; A coating driving unit installed on the lower support for moving the coating unit in a vertical direction of the main body; And a damping driving unit installed on the upper support to move the damping unit in a vertical direction of the main body.

The coating driving unit may further include a painting cam which upwardly pushes the lower supporting table so that the coating is selectively printed on the paper by the coating unit when the coating is rotated; A coating motor for rotating the coating cam via a coating cam shaft; And a painting spring for pulling down the lower support in a downward direction.

The damping driving unit may include a damping cam that pushes the upper support downward to selectively support the paper when the damping unit rotates; A damping motor for rotating the damping cam via a damping cam shaft; And a damping spring for pulling up the upper support in an upward direction.

The embodiments of the present invention can prevent the poor print quality of the paper by supporting the paper through the support pins provided in the coating portion when printing the paper, have..

1 is a side view showing a stamping apparatus according to an embodiment of the present invention.
Fig. 2 is a plan view of the lower main body viewed toward the "AA"
Fig. 3 is a rear view of the upper main body viewed toward the "BB"
4 is a side view showing a stamping unit of a stamping device according to an embodiment of the present invention.
5 is a state diagram schematically showing a state in which the upper surface of the paper is supported while the damping portion is moved downward by the damping cam in the stamping device according to the embodiment of the present invention.
FIG. 6 is a side view of a stamping apparatus according to an embodiment of the present invention. Referring to FIG. 6, in a state where the damping portion supports the upper surface of the sheet by the damping cam, Fig. 2 is a state diagram schematically showing a starting state.
7 is a view schematically showing a state in which the stamping unit completes stamping on the lower surface of the sheet in a state in which the damping portion supports the upper surface of the sheet by the damping cam in the stamping apparatus according to an embodiment of the present invention.
8 is a diagram schematically showing a state in which the damping spring pulls the damping portion upward by the rotation of the damping cam in a state in which the coating portion supports the lower surface of the paper by the coating cam in the stamping device according to the embodiment of the present invention. It is a state diagram.
9 is a state diagram schematically showing a state in which a coating spring pulls a coating part downward by rotation of a coating cam in a stamping device according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Prior to the description of the present invention, the direction in which the inlet and the outlet of the stamping device are extended is defined as the horizontal direction of the main body, and the direction orthogonal to the horizontal direction is defined as the vertical direction of the main body .

FIG. 1 is a side view showing a stamping device according to an embodiment of the present invention, FIG. 2 is a plan view of a lower main body viewed from the "AA" side of FIG. 1, FIG. 4 is a side view showing a stamping unit of a stamping device according to an embodiment of the present invention. FIG.

1 to 4, the stamping apparatus for paper according to an embodiment of the present invention stably supports the paper 10 through the support pins 312 during the printing of the paper 10, The printing quality of the paper 10 can be improved.

The stamping apparatus includes a main body 100 having a movement path 101 and a stamping unit 300 in which the stamping unit 310 and the damping unit 320 are installed movably in the vertical direction of the main body 100 ).

Specifically, the main body 100 is a case in which the stamping unit 300 is mounted. The main body 100 can provide a moving path 101 through which the paper 10 is fed, and the paper 10 is provided on the front and rear ends of the main body 100 An inlet 102 for entering and an outlet 103 for discharging the paper 10 may be provided, respectively. Here, the paper 10 may be understood as a concept including various kinds of paper which require printing of a coating, in addition to a thin paper currency having a predetermined shape printed on money or the like.

The main body 100 may include an upper main body 100a and a lower main body 100b which are disposed on upper and lower sides with the movement path 101 therebetween. The upper and lower main bodies 100a and 100b are rotatably connected to each other through a hinge shaft 110 provided at the inlet 102 side of the main body 100. [

The movement path 101 of the main body 100 is rotated by a predetermined angle with respect to the hinge shaft 110 while the grip 120 of the upper main body 100a is gripped, The assembly structure between the upper main body 100a and the lower main body 100b can be variously changed.

An elastic guide 510 and a guide plate 520 may be respectively installed on the upper and lower sides of the inlet 102 side of the main body 100. The guide plate 520 may be fixed in an inclined downward direction in the lower main body 100b so that the paper 10 can easily enter the main body 100. [

The elastic guide 510 may be formed such that the proximal end thereof is rotatably installed on the upper body 100a and the distal end thereof is bent. The front end portion of the elastic guide 510 can press the paper 10 fed into the main body 100 from the inlet side to maintain a flat state.

That is, even if the paper 10 being conveyed is temporarily stopped during the printing of the paper 10, since the leading end of the elastic guide 510 presses the paper 10, Curling of the paper 10 can be prevented. In this embodiment, the elastic guide 510 presses the paper 10 by its own weight, but it can provide a certain pressing force to the paper 10 by using a separate elastic spring.

The guide grooves 104 may be formed on the side walls of the main body 100 and more specifically on the upper and lower main bodies 100a and 100b in a direction perpendicular to the main body 100. [ The guide grooves 104 can vertically guide the upper support 340 and the lower support 330 of the stamping unit 300, which will be described later.

A locking means 130 for locking the upper body 100a and the lower body 100b together may be provided on the side of the outlet 103 of the main body 100. [ The locking means 130 includes a locking pin 131 protruding from the outlet 103 of the upper main body 100a and a locking hook 132 rotatably installed at the outlet 103 side of the lower main body 100b .

This allows the locking hook 132 to be fastened and fixed to the locking pin 131 in a state in which the upper main body 100a and the lower main body 100b are positioned close to each other when the paint is to be printed on the paper 10. [ When the painting unit 310 or the damping unit 320 is to be replaced, the locking hook 132 is separated from the locking pin 131 to rotate the upper body 100a away from the lower body 100b, The moving path 101 of the main body 100 can be opened.

A conveying means 200 for conveying the paper 10 may be provided in the main body 100.

The conveying means 200 can convey the paper 10 which has entered from the entrance 102 side of the main body 100 to the exit 103 side of the main body 100 along the movement path 101. [ At this time, the stamping device can be positioned at the output side of the printer. For example, when the paper 10 is output at a specific ejection speed in the printer, the paper 10 output from the printer can enter the stamping device at a predetermined infeed speed.

The conveying means 200 may include a first conveying roller 210, a second conveying roller 220 and a conveying motor 230.

The first conveying roller 210 may be rotatably installed at the entrance 102 side of the main body 100 via the first conveying shaft 240 and may be rotatably installed on the main body 100, (Not shown). At this time, both ends of the first conveying shaft 240 can be rotatably mounted on both side walls of the upper body 100a, and the first conveying shaft 240 is rotatably supported by the conveying motor 230 through the driving belt 201 And may be operably connected to the motor shaft.

The first conveying roller 210 is rotated by the first conveying shaft 240 so that the paper 10 is conveyed from the entrance 102 side of the main body 100 to the center side of the main body 100 where the stamping unit 300 is located Can be transported. Particularly, when the paper 10 of a size smaller than the reference size (for example, A4 size) (for example, A5 size) is fed to the inlet 102 of the main body 100 while maintaining the discharge speed of the printer at the output side of the printer The first conveying roller 210 can smoothly be conveyed along the movement path 101 of the stamping device by the rotational force of the first conveying roller 210. [

The second conveying roller 220 can be rotatably installed on the side of the outlet 103 of the main body 100 via the second conveying shaft 250 and can be rotated (Not shown). The second conveying roller 220 is rotated by the second conveying shaft 250 so that the paper 10 conveyed from the center side of the main body 100 to the outlet 103 side can be discharged to the outside of the main body 100 have. At this time, both end portions of the second conveying shaft 250 are rotatably mounted on both side walls of the upper main body 100a, and the second conveying shaft 250 is rotatably mounted on the motor shaft 230 of the conveying motor 230 via the drive belt 201. [ As shown in FIG.

The conveying motor 230 is a motor for providing a driving force to the first conveying roller 210 and the second conveying roller 220. The motor shaft of the conveying motor 230 is connected to the first conveying shaft 240 and the second conveying shaft 250 so as to be interlocked with each other.

The driving force of the conveying motor 230 is transmitted to the first conveying shaft 240 and the second conveying shaft 250 through the driving belt 201 . When the first conveying shaft 240 and the second conveying shaft 250 are rotated by the drive belt 201, the first conveying roller 210 rotates in the direction of the paper 102 10 can be conveyed along the movement path 101 to the outlet 103 side and the second conveying roller 220 can convey the paper 10 conveyed to the outlet 103 side of the main body 100 to the main body 100 And can be discharged to the outside.

In this embodiment, a first conveying roller 210 and a second conveying roller 220 are provided on the upper main body 100a and these first conveying rollers 210 and second conveying rollers 220 are provided on the lower main body 100b, 220 and the first and second support rollers 260 and 270 are provided, but these conveying rollers and the support rollers may be located on the opposite sides of each other. A first supporting roller 260 and a second supporting roller 270 are provided on the upper main body 100a and a first feeding roller 210 and a second feeding roller 220 are mounted on the lower main body 100b, Can be installed.

Since the first supporting roller 260 and the second supporting roller 270 are disposed opposite to the first conveying roller 210 and the second conveying roller 220 with the moving path 101 therebetween, The paper 10 can be transported from the inlet 102 side of the main body 100 to the outlet side 103 side through the frictional force by the conveying roller and the supporting roller.

A sensor for detecting the position of the paper 10 may be provided on the movement path 101 of the main body 100.

The detection sensor includes a first detection sensor 610 provided at the entrance 102 side of the main body 100, a second detection sensor 620 provided between the stamping unit 300 and the entrance 102, And a third sensing sensor 630 provided on the outlet 103 side of the first sensor 100.

The first sensing sensor 610 senses the paper 10 entering the entrance 102 side of the main body 100 and can apply the sensed position signal to the controller. The second sensing sensor 620 senses the paper 10 that enters the stamping unit 300 for printing and can apply the position signal of the sensed paper 10 to the controller. The third sensing sensor 630 senses the paper 10 discharged to the outlet 103 of the main body 100 and applies the position signal of the sensed paper 10 to the controller.

A stamping unit 300 may be provided on the center side of the main body 100 to print the paper 10 on the paper.

The stamping unit 300 includes a coating unit 310, a damping unit 320, a lower support 330, an upper support 340, a coating driving unit 350, and a damping driving unit 360. A predetermined coating can be printed at least once on the moving paper 10 moving on the moving path 101 of the recording medium.

The coating unit 310 can be detachably mounted on the lower support table 330 and can print the coating on the paper 10 placed on the movement path 101 by the vertical movement of the lower support table 330. [ A mark, letter, model, letter or the like to be printed on the paper 10 can be embossed or embossed in the painting part 310 so that a paint can be printed on the paper 10 when pressed. Since the coating unit 310 is a commonly used automatic stamp, a detailed description thereof will be omitted.

The coating unit 310 includes a stamper 311 for printing a coating on the paper 10 and a plurality of spaced apart portions on the edge side of the stamper 311. The coating unit 310 is provided on the paper 10 And a support pin 312 for elastically supporting the support pin 312. In this embodiment, the support pin 312 is composed of four support pins 312 arranged symmetrically in the circumferential direction on the edge side of the stamper 311 with respect to the center of the stamper 311, 312 may be variously modified to support the paper 10 in a balanced and stable manner.

The damping unit 320 may be disposed to face the coating unit 310 in order to support the paper 10 during the coating printing by the coating unit 310. The damping unit 320 may be detachably mounted on the upper support 340 and may support the upper surface of the paper 10 by the vertical movement of the upper support 340.

The damping unit 320 includes a soft damper 321 for supporting the back side of the sheet to be printed by the stamper 311 and a back side of the sheet for contacting the end of the support pin 312, And a hard damper 322 for supporting the damper 322. Here, the hard damper 322 is made of a material having a harder strength than that of the soft damper 321. In this embodiment, the soft damper 321 may be an elastic body such as a rubber, and the hard damper 322 may be fixed A synthetic polymer resin having strength can be used.

By disposing the hard damper 322 having a certain strength in the damping portion 320 on which the support pin 312 is supported, it is possible to effectively support the paper 10 through the support pin 312, It is possible to prevent the print quality of the paper from becoming poor.

The lower support member 330 can be mounted movably in the vertical direction in the lower main body 100b. Both ends of the lower supporter 330 can be mounted movably in the vertical direction to the guide grooves 104 of the lower main body 100b through the guide pins 302. [

A coating slot 331 on which the coating part 310 is mounted may be formed on the upper surface of the lower support part 330. A plurality of coating slots 331 are formed on the upper surface of the lower support table 330 so that the coating unit 310 is divided into a plurality of coating slots 331 in consideration of the position of the coating to be printed on the paper 10. [ As shown in Fig.

The upper support 340 can be mounted movably in the vertical direction in the upper body 100a. Both ends of the upper supporter 340 can be mounted movably in a direction perpendicular to the guide grooves 104 of the upper main body 100a.

A plurality of damping slots 332 on which the damping portions 320 are mounted may be formed on the lower surface of the upper supporter 340. The damping part 320 can be selectively mounted on the plurality of damping slots 332 in consideration of the mounting position of the coating part 310.

The coating driving part 350 may be mounted on the lower main body 100b and move the lower supporting frame 330 on which the coating part 310 is mounted in the vertical direction of the main body 100. [

The coating drive unit 350 includes a coating shaft 354 rotatably mounted on both side walls of the lower main body 100b and a paint frame 354 mounted on the coating shaft 354 and having a long portion 351a and an end portion 351b, A coating motor 352 drivingly connected to the conveying shaft via a plurality of driven gears 301 for rotating the coating cam 351 and a lower motor 352 for pulling the lower support table 330 downward And a painting spring 353 connecting between the lower main body 100b and the lower supporting base 330. [

The drive force of the paint motor 352 is transmitted to the paint shaft 354 through the driven gear 301 so that the paint shaft 354 is driven . When the painting cam 351 is rotated by 90 degrees, the book 351a of the painting cam 351 pushes the lower supporting table 330, and at the same time, the painting unit 310 can print the painting on the paper 10 . When the painting cam 351 is rotated 180 degrees, the end 351b of the painting cam 351 is located opposite to the lower supporting table 330. At this time, the painting spring 353 rotates the lower supporting table 330 So that the lower support member 330 can be returned to its original position.

The damping driving unit 360 may be mounted on the upper body 100a and may move the upper support 340 on which the damping unit 320 and the damping unit 320 are mounted in the vertical direction of the body 100.

The damping drive unit 360 includes a damping shaft 364 rotatably mounted on both side walls of the upper main body 100a and a damping shaft 364 mounted on the damping shaft 364 and having a knob 361a and an end 361b, A damping motor 362 drivingly connected to the damping shaft 364 via a plurality of driven gears 301 for rotating the damping cam 361 and a damping motor 362 for driving the upper support 340 in an upward direction And may include a damping spring 363 connecting between the upper body 100a and the upper support 340 for pulling.

Therefore, when the damping motor 362 is operated by the operation signal of the controller, the driving force of the damping motor 362 can be transmitted to the damping shaft 364 via the driven gear 301 to rotate the damping shaft 364 . When the damping cam 361 is rotated 90 degrees, the ledge 361a of the damping cam 361 pushes the upper support 340, and the damping portion 320 can support the upper surface of the paper 10 at this time. Then, when the damping cam 361 is rotated by 180 degrees, the end portion 361b of the damping cam 361 is positioned to face the upper support 340, So that the upper support 340 can be returned to its original position.

In particular, the controller sequentially applies an actuating signal to the damping unit 320 and the coating unit 310 of the stamping unit 300 to move the damping unit 320 downward first, 310 can be sequentially moved upwards so that the printing of the paper 10 between the damping portion 320 and the coating portion 310 can be smoothly performed.

If the damping cam 361 and the coating cam 351 are formed in the shape of a crosshair when the damping unit 320 and the coating unit 310 are simultaneously operated, When the damping cam 361 and the coating cam 351 are positioned on a straight line relative to each other at the top dead center point (one point on the outer peripheral surface of the longest distance from the damping shaft or the coating shaft) The damping cam 361 and the seal cam 351 are pressed against each other with the paper 10 sandwiched therebetween so that the damping cam 361 and the seal cam 351 overlap and overlap each other (about 2 mm) The load of the damping cam 361 and the coating cam 351 at the start of overlapping can be increased. As a result, these damping cams 361 and the coating cams 351 may not operate normally, and noise may be generated during operation of the damping cam 361 and the coating cam 351.

5 is a schematic view showing a state in which a damping portion is supported by a damping cam in a downward direction while supporting an upper surface of the paper in a stamping device according to an embodiment of the present invention. In the stamping apparatus according to the example, the state in which the painting portion starts to stamp on the lower surface of the sheet while the painting portion is moved upward by the coating cam in a state in which the damping portion supports the upper surface of the sheet by the damping cam 7 is a state diagram schematically showing a state in which the stamping portion completes stamping on the lower surface of the sheet in a state in which the damping portion supports the upper surface of the sheet by the damping cam in the stamping device according to the embodiment of the present invention 8 is a side view of a stamping device according to an embodiment of the present invention. In the stamping device, when the lower surface of the paper sheet is supported by the coating cam, FIG. 9 schematically shows a state in which the coating spring pulls the coating part downward by the rotation of the coating cam, in a stamping device according to an embodiment of the present invention. FIG. 9 is a perspective view schematically showing a state It is a state diagram.

5, when the damping cam 361 is rotated in one direction (for example, clockwise direction in the figure) by the operation of the damping motor 362, the ledge 361a of the damping portion 320 The upper support 340 is pushed and the damping unit 320 is moved downward to contact and support the upper surface of the paper 10. [

When the painting motor 352 is operated with a time lag from the operation time of the damping motor 362 and the painting cam 351 is rotated in the other direction (for example, counterclockwise in the drawing) The coating unit 310 can move upward toward the paper sheet 10 because the paper sheet 351a first touches the lower support table 330 and pushes it. At this time, the support pins 312 of the coating unit 310 can elastically support the lower surface of the paper.

6, the damping cam 361 is rotated in one direction so that the damping cam 361 is positioned at the top dead center (perpendicular to the upper support) and the coating cam 351 rotates in the other direction The support pin 312 of the coating portion 310 is pressed and the stamping on the paper can be started for the first time as the lead portion 351a of the coating cam 351 is first contacted to the lower support table 330 by a predetermined angle.

The damping cam 361 moves away from the top dead center as the damping cam 361 advances in one direction and the coating cam 351 rotates in the other direction, The stamping on the paper can be completed while being positioned at a point (positioned perpendicular to the lower support).

8, when the damping cam 361 continues to rotate in one direction, the damping portion 320 can be moved upward by the damping spring 363, and the coating cam 351 is moved in the other direction The rotation can proceed and escape. At this time, the coating unit 310 can be kept in contact with the lower surface of the paper 10.

9, when the one-way rotation of the damping cam 361 continues, the damping portion 320 can be continuously moved upward by the damping spring 363, When the direction rotation continues, the coating portion 310 can be moved downward by the coating spring 353. [ At this time, the support pins 312 of the coating unit 310 may be elastically restored by the elastic means and may protrude from the coating unit 310 in the original state.

INDUSTRIAL APPLICABILITY As described above, according to the present invention, since the paper is supported through the support pins provided in the coating portion during the printing of the paper, the printing quality of the paper can be prevented from becoming poor, It has excellent advantages.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. For example, a person skilled in the art can change the material, size and the like of each constituent element depending on the application field or can combine or substitute the embodiments in a form not clearly disclosed in the embodiments of the present invention, Of the range. Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and that such modified embodiments are included in the technical idea described in the claims of the present invention.

100: main body 101: moving path
200: conveying means 210: first conveying roller
220: second conveying roller 230: conveying motor
300: stamping unit 310:
311: stamper 312: support pin
320: damping portion 321: soft damper
322: Hard damper 330: Lower support
340: upper support 350: coating drive
351: Painting cam 352: Painting motor
353: paint spring 360: damping drive part
361: damping cam 362: damping motor
363: Damping spring 510: Elastic guide
520: guide plate 610: first detection sensor
620: second sensing sensor 630: third sensing sensor

Claims

A body for providing a movement path through which the sheet is fed; And
A stamping unit for stamping the sheet to be transferred; and a damping unit arranged to face the stamping unit to support the sheet to be stamped, wherein the stamping unit and the damping unit are provided so as to be movable in a vertical direction of the main body Unit,
The coating unit
A stamper for printing an image on said paper; And
And a plurality of support pins spaced apart from the edge of the stamper so as to elastically support the paper.

The method according to claim 1,
The damping unit
A soft damper for supporting a back surface of the sheet to be printed by the stamper; And
And a hard damper provided on an edge side of the soft damper so as to support a back surface of the sheet to which the end of the support pin is contacted.

The method according to claim 1,
The support pin
Wherein a plurality of portions are arranged symmetrically in the circumferential direction on the edge side of the stamper with respect to the center portion of the stamper.

3. The method of claim 2,
The hard damper
Wherein the soft damper is made of a material having a harder strength than that of the soft damper.

The method according to claim 1,
The stamping unit
A lower support positioned below the movement path and formed with a coating slot in which the coating part is mounted;
An upper support positioned above the movement path and having a damping slot to which the damping portion is mounted;
A coating driving unit installed on the lower support for moving the coating unit in a vertical direction of the main body; And
And a damping driving unit installed on the upper support to move the damping unit in the vertical direction of the main body.

6. The method of claim 5,
The coating-
A painting cam which upwardly pushes the lower support so that the coating is selectively printed on the paper by the coating unit during rotation;
A coating motor for rotating the coating cam via a coating cam shaft; And
And a painting spring for pulling down the lower support in a downward direction.

6. The method of claim 5,
The damping driver
A damping cam that pushes the upper support downward to selectively support the paper when the damping unit rotates;
A damping motor for rotating the damping cam via a damping cam shaft; And
And a damping spring for pulling up the upper support in an upward direction.