KR101835511B1 - Apparatus for attaching optical plate - Google Patents

Abstract

The present invention relates to an optical plate attaching apparatus, and in particular, to provide an optical plate attaching apparatus for realizing a simpler structure and prolonging a replacement time of consumable parts.
To this end, the apparatus for attaching an optical plate according to the present invention employs an adsorption pad having a plurality of micro-hollow holes and employs a peeling unit including first and second peeling sections capable of cross peeling, thereby reducing replacement cost and time, The productivity can be improved.

Description

[0001] APPARATUS FOR ATTACHING OPTICAL PLATE [

The present invention relates to an optical plate attaching apparatus, and more particularly to an optical plate attaching apparatus for attaching an optical plate for a liquid crystal display apparatus to an object.

2. Description of the Related Art In recent years, the display field has rapidly developed in line with the information age. In response to this trend, a flat panel display device (FPD) having a thinness, light weight, A plasma display panel (PDP), an electroluminescence display device (ELD), and a field emission display device (FED) : CRT).

In particular, a liquid crystal display device is characterized in that it has a large contrast ratio, is suitable for moving picture display, and has low power consumption, and is utilized in various fields such as a notebook computer, a monitor, and a TV. As is well known, liquid crystals have optical anisotropy, in which molecular structures are elongated and directionally oriented, and polarizing properties, in which the direction of molecular arrangement is changed according to their sizes when placed in an electric field.

That is, a general liquid crystal display device includes a liquid crystal display device in which a liquid crystal layer is interposed between a first substrate on which an array layer for liquid crystal driving is formed and a second substrate on which a color filter layer for color implementation is provided, A display panel is an essential component, which changes the arrangement direction of the liquid crystal molecules with an electric field inside, thereby causing a difference in transmittance.

The difference in transmittance of the liquid crystal display panel is displayed in the form of a color image by reflecting the color combination of the color filter through the light of a back light placed on the back surface thereof.

A general LCD manufacturing process can be divided into a cell process for completing a liquid crystal display panel and a module process for integrating a liquid crystal display panel and a backlight.

Here, in the cell process, an array substrate on which a gate wiring, a data line and a thin film transistor (TFT) are formed, and a color filter substrate on which a color filter composed of red, green, An alignment process for forming an alignment film for orienting the color filter substrate in the direction of alignment; a laminating process for laminating the two substrates to maintain a constant cell gap; a sealing process for injecting liquid crystal between the array substrate and the color filter substrate And a cell cutting step of separating the bonded substrates into liquid crystal display panel units.

On the outer surfaces of the array substrate and the color filter substrate of the liquid crystal display panel completed through such a cell process, an optical plate attaching step for attaching the polarizing plate by using the optical plate attaching apparatus proceeds.

Since the polarizing plate is provided with the release film attached thereto, the release film must be removed before attaching the polarizing plate to each outer surface of the array substrate and the color filter substrate.

To this end, an optical plate attaching apparatus includes an adsorption unit for adsorbing a polarizing plate having a release film and a peeling unit for peeling off a release film attached to the polarizing plate. The adsorption unit adjusts the air pressure by sucking or supplying air, Adsorbing or separating the adsorbent, which is disadvantageous in that the composition is complicated and the cost of the component parts is high. This has the disadvantage of being difficult to repair in case of failure and expensive to replace components.

In order to solve the above problems, it is an object of the present invention to provide an apparatus for attaching an optical plate having a simple structure by applying an adsorption pad including a plurality of fine hollow holes.

According to an aspect of the present invention, there is provided an apparatus for attaching an optical plate, comprising: a drum-shaped rotating body; and at least one adsorption pad attached to an outer circumferential surface of the rotating body, An adsorbing unit for adsorbing the adsorbent through the adsorption unit; A peeling unit comprising a bar-shaped peeling stage and first and second peeling sections which are respectively located at both ends of the peeling stage and which operate alternately to separate the releasing film from the optical sheet; And an attaching unit for attaching the optical plate on which the release film is separated to an object, wherein the first and second peeling portions are respectively moved in directions toward each other at both ends of the peeling stage, Separate.

Here, the adsorption pad may include a base layer made of a white foamed polyester film; An adhesive layer formed on the base layer to adhere the adsorption pad to the outer surface of the rotating body and polyacrylate formed on the base layer and including a plurality of fine hollow holes, And an adsorption layer.

Each of the first and second peeling portions includes a peeling roller portion that separates the end of the release film from the optical sheet, including a roller coated with a sticky material along the outer surface, and a peeling roller portion And a clamping portion for holding the end portion.

And a supply unit for supplying the optical sheet to the adsorption unit, including a supply stage for the optical sheet to be placed thereon.

Here, the adsorption unit may further include a press-in roller for guiding the optical sheet to be adsorbed on the adsorption pad.

In addition, each of the first and second peeling sections alternately operates alternately, or alternatively operates a predetermined number of times.

The optical plate is a polarizing plate, and the object is a liquid crystal display panel.

According to the apparatus for attaching an optical plate according to the present invention, an optical plate attaching apparatus having a simpler structure can be realized by applying an adsorption pad made of polyacrylate.

Further, by applying the peeling unit of the cross peeling method, the replacement time of the adsorption pad is extended. By extending the replacement period as described above, it is possible to reduce labor and replacement time due to parts replacement, thereby improving work efficiency and productivity, and reducing parts cost.

Accordingly, the manufacturing cost of the entire liquid crystal display device can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view schematically showing a configuration of an optical plate attaching apparatus according to a preferred embodiment of the present invention. Fig.
2 is a schematic view showing a cross section of an optical plate attaching apparatus according to a preferred embodiment of the present invention.
3 is a cross-sectional view of an adsorption pad according to a preferred embodiment of the present invention.
4A and 4B are views for explaining an adsorption process in an optical plate adhering apparatus according to a preferred embodiment of the present invention.
4C and 4D are diagrams for explaining a peeling process and an attaching process in an optical plate attaching apparatus according to a preferred embodiment of the present invention.
5 is a view schematically showing a configuration of an optical plate attaching apparatus according to another preferred embodiment of the present invention.
6 is a view for explaining the operation of the peeling unit according to another preferred embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Here, as an optical plate according to the present invention, a polarizing plate will be described as an example. The polarizing plate is attached to the outer surface of the liquid crystal display panel and selectively transmits light. The polarizing plate is provided in a state that a release film is adhered to one surface of the adhesive surface until it is attached to the liquid crystal display panel.

Hereinafter, for convenience of explanation, the polarizing plate having a release film is referred to as a polarizing sheet, and the polarizing sheet from which the release film has been removed is referred to as a polarizing plate.

FIG. 1 is a view schematically showing a configuration of an optical plate attaching apparatus according to a preferred embodiment of the present invention, and FIG. 2 is a view schematically showing a cross section of an optical plate attaching apparatus according to a preferred embodiment of the present invention.

1 and 2, the optical plate attaching apparatus 100 includes a feed unit 110 for feeding a polarizing sheet 112, a feed unit 110 located at a lower portion of the feed unit 110, A peeling unit 130 for peeling off the release film 112b from the polarizing sheet 112 attached to the absorption unit 120 and a polarizing plate 112a for separating the polarizing sheet 112, And an attachment unit 140 that attaches to the panel 142. Fig.

The release film 112b protects and transports the polarizer 112a until the polarizer 112a adheres to the object, and is generally made of polyethylene terephthalate (PET) resin and has a transparent or semitransparent color. But may be made of any one of polyethylene and polyamide resins.

The supply unit 110 serves to supply the polarizing sheet 112 to the adsorption unit 120, including a supply stage 114 on which the polarizing sheet 112 is mounted and moves up and down or moves back and forth.

At this time, the polarizing sheet 112 is seated on the back surface of the supply stage 114 of the supply unit 110, and the surface of the release film 112b and the back surface of the supply stage 114 are seated against each other. The feed unit 110 for this purpose can be configured to place the polarizing sheet 112 on the feeding stage 114 via vacuum or other means.

The adsorption unit 120 includes a rotating body 122 having a drum shape, at least one adsorption pad 123 attached along the outer circumferential surface of the rotating body 122, and a polarizing sheet 112 supplied from the supplying unit 110, And a pressing roller portion 125 for allowing the polarizing sheet 112 to be attracted to the adsorption pad 123. [

At this time, at least one polarizing sheet 112 may be adsorbed on the rotating body 122 of the adsorption unit 120 in correspondence with at least one adsorption pad 123. At this time, it is preferable that the absorption pad 123 is larger than the size of the polarizing sheet 112 to absorb the polarizing sheet 112.

For example, as shown in the figure, when two adsorption pads 123 including first and second adsorption pads are attached to the rotating body 122, and the polarizing sheet 112 is adsorbed to each of the two adsorption pads 123, It can be done at the same time. The adsorption process of adsorbing the first polarizing sheet 112 supplied by the supply unit 110 to the first adsorption pad 123 of the adsorption unit 120 and the second adsorption process of the second adsorption unit 120 of the adsorption unit 120 will be described in more detail. The peeling step for peeling off the second release film 112b from the second polarizing sheet 112 adsorbed to the adsorption pad 123 can be carried out at the same time or the peeling step for adsorbing to the first adsorption pad 123 of the adsorption unit 120 A peeling process of peeling the first release film 112b from the first polarizing sheet 112 and a second polarizing plate 112a from which the second release film 112b has been removed are attached to the liquid crystal display panel 142 So that the working time can be shortened and the working efficiency can be improved.

On the other hand, the adsorption pad 123 is a white pad formed by successively forming an adhesive layer 202, a base layer 204 and an adsorption layer 206 from the lower part to the upper part as shown in FIG. 3, The first and second protective films 210 and 220 for protecting the adhesive layer 202 and the adsorption layer 206 are adhered to the adhesive layer 202 and the adhesive layer 206, respectively.

Here, the adhesive layer 202 adheres the adsorption pad 123 to the outer surface of the adsorption unit 120.

The base layer 204 corresponds to a white foam polyester film having a thickness of about 50 mu m.

The adsorption layer 206 corresponds to a polyacrylate including a plurality of minute hollow holes 207 in the order of μm as shown in the figure, and has a thickness of about 300 μm.

Accordingly, each of the fine hollow holes 207 in the adsorption layer 206 becomes a vacuum state, thereby forming a micro vacuum hole, thereby adsorbing the polarizing sheet 112.

When attaching the adsorption pad 123 to the adsorption unit 120, the first protective film 210 attached to the adhesive layer 202 is removed, the adhesive layer 202 is attached to the adsorption unit 120, Then, the second protective film 220 is removed so that the polarizing sheet 112 can be absorbed.

The adsorption unit 120 to which the adsorption pad 123 is applied has a simpler structure than the adsorption unit using the conventional vacuum pressure, and has an advantage of being easily repaired and replaced. To describe this in more detail, in the case of a conventional adsorption unit, an air hole formed in the entire outer circumferential surface of the rotating body and a suction portion for supplying or sucking air into the air hole are made, and the air passage is evacuated to adsorb the polarizing sheet However, since the absorption unit 120 according to the present invention adsorbs the polarizing sheet 112 through the above-described absorption pad 123, its structure is simplified.

The press roller 125 is moved to a position for pressing the polarizing sheet 112 which is positioned at a certain distance from the adsorption unit 120 and then adsorbed on the adsorption unit 120 during the adsorption process, And serves to guide the adsorption pad 123 so that the polarizing sheet 112 can be attracted more reliably.

The peeling unit 130 is composed of a peeling stage 132 having a bar shape and moving forward and backward and a peeling section 138 moving along the longitudinal direction of the peeling stage 132 on the peeling stage 132.

The peeling section 138 includes a peeling roller section 134 for separating the end of the release film 112b from the polarizing sheet 112 and a peeling section 134 for holding the end of the release film 112b separated by the peeling roller section 134 And includes a clamping portion 136.

The peeling roller portion 134 includes a roller 134a coated with an adhesive material along the outer surface and a roller cylinder 134b connected to the roller 134a to move the roller 134a in the forward or backward direction .

The roller 134a is transported to the peeling position by the roller cylinder 134b and serves to peel the end of the release film 112b from the polarizing sheet 112 attached to the adsorption pad 123. [

The clamp section 136 includes a clamp 136a for holding the release film 112b and a clamp cylinder 136b connected to the clamp 136a to move the clamp 136a in the forward or backward direction.

The clamp 136a is transferred by the clamp cylinder 136b to hold the end of the release film 112b peeled off through the peeling roller 134 to completely remove the release film 112b from the polarizing sheet 112 .

The peeling unit 138 of the peeling unit 130 is initially positioned at one end of the peeling stage 132 and the peeling roller unit 134 separates the end of the releasing film 112b from the polarizing sheet 112, When the end 136 of the release film 136 seizes the end of the release film 112b, the release film moves from one end of the release stage 132 to the other end opposite thereto to remove the release film 112b from the polarizing sheet 112. As the peeling unit 138 moves from one end to the other end of the peeling stage 132 and removes the releasing film 112b, the releasing film 112b of the polarizing sheet 112 adsorbed to the adsorption unit 120 ) Is peeled from the corner of the work in the oblique direction.

The attaching unit 140 includes an attaching stage 144 for placing the liquid crystal display panel 142 in a state where the array substrate 142a and the color filter substrate 142b are bonded to each other, do.

The attaching unit 140 is attached to the liquid crystal display panel 142 in a state in which the liquid crystal display panel 142 is mounted on the entire surface of the attaching stage 144 and is conveyed toward the adsorption unit 120, (112a) is attached.

Here, the positions of the attachment unit 140 and the supply unit 110 may be switched from each other, and the attachment stage 144 of the attachment unit 140 and the supply stage 114 of the supply unit 110 may be mutually opposite In the direction of movement. For example, the supply stage 114 of the supply unit 110 is moved in a first direction during the adsorption process, and the attachment stage 144 of the attachment unit 140 is moved in a second direction opposite to the first direction Direction.

Hereinafter, the case where the peeling step and the attaching step proceed simultaneously with respect to different polarizing sheets (polarizing plates) in the optical plate attaching apparatus will be described in detail with reference to the drawings.

FIGS. 4A and 4B are views for explaining an adsorption process in an optical plate attaching apparatus according to a preferred embodiment of the present invention, and FIGS. 4C and 4D are diagrams for explaining an optical plate attaching apparatus according to a preferred embodiment of the present invention, Fig. 1 is a view for explaining an attaching process, and Fig. 2 is referred to.

The optical plate attaching apparatus (100 in Fig. 1) includes an adsorption process for adsorbing the polarizing sheet to the adsorption unit, a peeling process for peeling off the release film from the polarizing sheet, and an adhering process for attaching the polarizing plate from which the release film has been removed to the liquid crystal display panel Go ahead.

First, as shown in Fig. 4A, the feeding stage 114 of the feeding unit (110 in Fig. 1) on which the polarizing sheet 112 is placed is lowered toward the lower adsorption unit (120 in Fig. 1) (Fig. 1) 120 is rotated by a rotation part (not shown) at a constant speed in the first rotation direction, as shown in Fig. 4B, And the polarizing sheet 112 seated on the stage 114 is absorbed. At this time, although not shown, the feeding stage 114 can be moved along the first direction together with the rotation of the rotating body 122. Further, the adsorption unit (120 in Fig. 1) can guide the adsorption of the polarizing sheet 112 through the press roller portion 115 for more reliable adsorption.

First, as shown in Fig. 4C, the peeling roller portion 134 of the peeling unit (130 in Fig. 1) is peeled off from the polarizing sheet (Fig. 1) 112), and the end of the release film 112a of the polarizing sheet 112 is adhered to the roller 134a.

The release film 112b of the polarizing sheet 112 is peeled off by the peeling roller portion 134 while the rotation body 122 of the absorption unit 120 of Figure 1 is rotated in the first rotation direction, And the end of the separated release film 112b is gripped by the clamping portion 136 in FIG. 1 and away from the adsorption unit 120 in FIG. 1 together with the peeling roller portion 134. At this time, the attachment stage 144 of the attachment unit (140 in FIG. 1) is also conveyed along the second direction with the liquid crystal display panel 142 being seated.

Thereby, the end of the release film 112b adhered to the peeling roller portion 134 of the peeling unit (130 in Fig. 1) is separated and the clamp portion (136 in Fig. 1) is separated by the peeling roller portion 134 The release film 112b is removed from the polarizing sheet 112 by holding the end of the release film 112b. At this time, the peeling portion (138 in Fig. 1) including the peeling roller portion 134 and the clamp portion (136 in Fig. 1) moves from one end to the other end on the peeling stage (132 in Fig. 1) ) Is removed to complete the peeling process.

At the same time, the polarizing plate 112a of the absorption unit 120 and the liquid crystal display panel 142 of the attachment stage (132 of FIG. 1) are engaged with each other and the polarizing plate 112a is attached to the liquid crystal display panel 142, .

4C, the rotating body 122 of the adsorption unit 120 rotates by a predetermined angle in the second rotating direction opposite to the first rotating direction, before the peeling unit 130 is conveyed to the peeling position, ) Can be adjusted.

On the other hand, although not shown, the present invention is not limited to the above-described one, and the adsorption process for adsorbing the polarizing sheet and the peeling process for peeling off the release film can be conducted simultaneously on different polarizing sheets (polarizing plates).

On the other hand, the above-described adsorption pad is replaced with a consumable part because the adsorption force of the adsorption pad is weakened as the number of processes is repeated.

At this time, one end line of the adsorption pad corresponds to the adsorption start position of the adsorption process, the peeling start position of the peeling process and the adhering start position of the adsorption process. One corner edge of the adsorption pad is pressurized by the peeling unit and wear is particularly rapid.

When the adsorption force of one edge of the adsorption pad is lowered due to such abrasion, one edge of the polarizing sheet corresponding to one edge of the adsorption pad is not properly adsorbed on the adsorption pad and is lifted up, There is a problem that defects that generate bubbles are caused. Accordingly, it is necessary to frequently replace the adsorption pad, which increases the replacement cost and increases the manufacturing cost of the entire liquid crystal display device.

Therefore, another preferred embodiment of the present invention which can solve such a problem will be described with reference to the drawings.

FIG. 5 is a view showing an apparatus for attaching an optical plate according to another preferred embodiment of the present invention, and FIG. 6 is a view for explaining the operation of a peeling unit according to another preferred embodiment of the present invention. Here, the structure except for the peeling unit is the same as that of the optical plate attaching apparatus of Figs. 1 and 2, and thus the same reference numerals are assigned to the same components, and a detailed description thereof will be omitted.

5, the optical plate attaching apparatus 300 includes a feed unit 110 for feeding a polarizing sheet 112, a polarizing sheet feed unit 110 located below the feed unit 110 and fed from a feed unit 110, A peeling unit 330 for peeling the release film 112b from the polarizing sheet 112 attached to the absorption unit 120 and a polarizing plate 112a to the liquid crystal display panel 142 (Not shown).

The peeling unit 330 comprises a peeling stage 132 and first and second peeling sections 310 and 320 which are located at both ends of the peeling stage 132 and which cross each other.

The peeling stage 132 has a bar shape and is transported forward and backward.

Each of the first and second peeling sections 310 and 320 includes a peeling roller section 134 for adhering and separating the end of the release film 112b from the polarizing sheet 112 as shown in FIGS. And a clamping portion 136 for holding the release film 112 partially separated by the peeling roller portion 134.

The peeling roller unit 134 includes a roller 134a coated with an adhesive material along the outer surface and a roller cylinder 134b connected to the roller 134a to move the roller 134a forward or backward And the clamp section 136 includes a clamp 136a for holding the release film 112b and a clamp cylinder 136b connected to the clamp 136a to move the clamp 136a in the forward or backward direction.

The roller 134a of the peeling roller section 134 is transferred to the peeling position by the roller cylinder 134b to peel the end of the release film 112b from the polarizing sheet 112 attached to the adsorption pad 123 And the clamp 136a of the clamp 136 is transferred by the clamp cylinder 136b to hold the end of the release film 112b peeled off through the peeling roller 134 to remove the releasing film 112b.

Particularly, the first peeling unit 310 and the second peeling unit 320 alternately operate in an alternating manner to remove the release film 112a from each polarizing sheet 112, or the first peeling unit 310, The second peeling unit 320 may be operated alternately after the peeling process is performed a predetermined number of times.

For example, when the first and second peeling units 310 and 320 alternately cross each other, the first peeling unit 310 is positioned at one end of the peeling stage 132, And the first release film 112a is removed from the first polarizing sheet 112. As a result, In the second peeling process, the second peeling unit 320 is positioned at the other end on the peeling stage 132 and is moved in the direction of one end opposite to the other end, and the second release film (112a) is removed. At this time, it is preferable that the first and second peeling units 310 and 320 are moved within a range that does not cause interference with each other.

6, in the first peeling process, the first peeling unit 310 moves from one end to the other end of the peeling stage 132, which is the initial peeling position, and the first release film 112b, The first release film 112b of the first polarizing sheet 112 adsorbed to the absorption unit 120 is peeled from the one edge A in an oblique direction and then the second release film 112b is peeled The peeling unit 320 moves in the direction of one end from the other end of the peeling stage 132 which is the initial peeling position and removes the second release film 112b so that the second polarizing sheet 112 The second release film 112b of the second release film 112b is peeled from the other edge B positioned on the same line as the one edge in the oblique direction.

As described above, by applying the peeling unit including the first peeling portion and the second peeling portion capable of cross peeling to the optical plate attaching device, the replacement period of the adsorption pad can be doubled. This saves labor and replacement time due to part replacement, which improves work efficiency and productivity, and reduces parts cost.

Therefore, according to the present invention, by applying the adsorption pad for adsorbing the polarizing sheet through a plurality of fine hollow holes, the apparatus for attaching the optical plate can be realized with a simpler structure, and the replacement period of the adsorption pad is extended, .

While the present invention has been described by way of example with reference to a polarizing plate as an optical plate, it is preferable that the present invention can be applied not only to a polarizing plate but also to all optical plates provided with a release film attached thereto.

That is, the embodiments of the present invention described above are merely illustrative, and those skilled in the art can freely make modifications without departing from the gist of the present invention. Accordingly, the protection scope of the present invention includes modifications of the present invention within the scope of the appended claims and equivalents thereof.

100, 300: Optical plate attaching device 110: Feeding unit
112: polarizing sheet 112a: polarizing plate
112b: release film 114: supply stage
120: absorption unit 122: rotating body
123: adsorption pad 125: press roller
130: peeling unit 132: peeling stage
134: peeling roller section 136: clamp section
138: peeling section 140: attachment unit
142: liquid crystal display panel 144: attachment stage
310: first peeling unit 320: second peeling unit

Claims (8)

A suction unit for adsorbing at least one optical sheet through the adsorption pad, the adsorption unit comprising: a rotating body in the form of a drum; and at least one adsorption pad attached to an outer circumferential surface of the rotating body;
A peeling unit comprising a bar-shaped peeling stage and first and second peeling sections which are respectively located at both ends of the peeling stage and which operate alternately to separate the releasing film from the optical sheet;
And an attachment unit for attaching the optical plate on which the release film is separated to an object,
Wherein the first and second peeling portions are respectively moved in directions facing each other at both ends of the peeling stage to separate the release film from each of the optical sheets.
The method according to claim 1,
The adsorption pad
A base layer made of a white foam polyester film;
An adhesive layer formed on the base layer and attaching the adsorption pad to an outer surface of the rotating body;
And an adsorption layer formed on the base layer and made of polyacrylate containing a plurality of fine hollow holes to adsorb the optical sheet.
The method according to claim 1,
Each of the first and second peeling portions
A peeling roller portion including a roller coated with a sticky material along the outer surface to separate an end of the release film from the optical sheet; and a clamp portion holding an end of the release film separated through the peeling roller portion.
The method according to claim 1,
And a supply unit for supplying the optical sheet to the adsorption unit, the supply unit including a supply stage for the optical sheet to be placed thereon.
The method according to claim 1,
The adsorption unit
And an indentation roller for guiding the optical sheet to be attracted to the adsorption pad.
The method according to claim 1,
Each of the first and second peeling portions
Alternately crossing each other, or operating a predetermined number of times and alternately operating the optical plate.
The method according to claim 1,
Wherein the optical plate is a polarizing plate,
Wherein the object is a liquid crystal display panel. A suction unit for adsorbing at least one optical sheet through the adsorption pad, the adsorption unit comprising: a rotating body in the form of a drum; and at least one adsorption pad attached to an outer circumferential surface of the rotating body;
A peeling unit comprising a bar-shaped peeling stage and first and second peeling sections which are respectively located at both ends of the peeling stage and which operate alternately to separate the releasing film from the optical sheet;
An attaching unit for attaching the optical plate on which the release film is separated to an object
/ RTI >
Wherein the first peeling portion includes a first peeling roller portion, the second peeling portion includes a second peeling roller portion,
Wherein a distance between the rotating body and each of the first and second peeling roller sections is independently changed.

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