KR100832774B1 - Protecting Film Detaching Unit and Apparatus For Attaching Polarizer To LCD Panel Having the Same - Google Patents

Abstract

A protective film peeling head unit and a polarizing plate attaching device having the same are disclosed. The protective film peeling head unit of the present invention, while supplying an adhesive tape for peeling the protective film from the polarizing plate, the supply roller is wound around the circumferential surface adhesive tape; A recovery roller for recovering the waste adhesive tape used for peeling off the protective film; A contact roller which is provided between the supply roller and the recovery roller, and receives the adhesive tape from the supply roller to contact and press the adhesive tape to the surface of the protective film; And a tension control provided on an imaginary path connecting the supply roller and the recovery roller to adjust the tension of the adhesive tape and the waste adhesive tape by pressing the waste adhesive tape based on the amount of release of the adhesive tape released from the supply roller. And a buffer unit. According to the present invention, the waste adhesive tape can be properly collected without difficult and complicated synchronous control of the rotation of the supply roller and the recovery roller.

Protective film, polarizer, adhesion, peeling head unit, tape, supply, recovery, buffer part, tension

Description

Protective Film Detaching Unit and Apparatus For Attaching Polarizer To LCD Panel Having the Same}

1 is a block diagram of a polarizer attachment device according to an embodiment of the present invention.

FIG. 2 is a schematic partially enlarged perspective view of the polarizer attaching apparatus of FIG. 1.

3 to 5 are diagrams showing the step of peeling the protective film through the polarizing plate attachment device of FIG.

6 and 7 are views showing the operation of the tension control buffer unit of the protective film peeling head unit according to an embodiment of the present invention, respectively.

* Explanation of symbols for the main parts of the drawings

P: Polarizer F: Protective Film

T: Adhesive Tape T1: Waste Adhesive Tape

10 protective film peeling head unit 11 unit body

12: supply roller 13: recovery roller

14 contact roller 20 polarizing plate supply unit

21: head unit support portion 40: chucking portion

50: working line 70: polarizing plate attachment portion

75: polarizing plate adsorption die 80: protective film recovery unit

90: tension adjusting buffer section 91: main tension roller

92: moving bar 93: elastic member

94: support wall 95: auxiliary tension roller

96: connection

The present invention relates to a protective film peeling head unit and a polarizing plate attachment device having the same, and more particularly, it is possible to properly collect the waste adhesive tape without the difficult and complicated synchronous control of the rotation of the supply roller and the recovery roller. It relates to a protective film peeling head unit and a polarizing plate attachment device having the same.

Recently, the flat panel display (FPD) has begun to emerge as the electronic display industry is rapidly developing among the semiconductor industry.

A flat panel display (FPD) is an image display device that is thinner and lighter than a cathode ray tube (CRT), which has been mainly used as a display for a TV or a computer monitor, and includes a liquid crystal display (LCD, liquid). crystal displays), plasma display panels (PDPs), organic light emitting diodes (OLEDs), and the like.

One of such flat display (FPD) thin film transistor (TFT-LCD) liquid crystal displays (TFT-LCDs) injects a liquid crystal, which is an intermediate material between a solid and a liquid, between two thin upper and lower glass substrates. It is a device using a kind of optical switch phenomenon that displays the number or the image by generating the contrast by changing the arrangement of the liquid crystal molecules by the electrode voltage difference of the substrate.

Liquid crystal display (LCD) is replacing the existing cathode ray tube (CRT) at a high speed due to the excellent performance of thin, light weight, low power consumption. Therefore, it is widely used in electronic products such as electronic clocks, electronic calculators, TVs, notebook PCs, speed displays and driving systems of automobiles and aircrafts.

Such liquid crystal display (LCD) is largely released as a product through a TFT process, a cell process, and a module process.

The TFT process is very similar to the semiconductor manufacturing process, in which thin film transistors are arranged on a glass substrate by repeating deposition, photolithography, and etching.

The Cell process forms an alignment layer on the TFT bottom plate manufactured by the TFT process and the top plate which is a color filter so that the liquid crystals can be aligned well. The top and bottom plates are formed by corals and seal printing. It is a process of bonding.

The module process attaches a polarizing plate to the completed LCD panel, mounts an integrated circuit (Drive-IC), assembles it with a PCB (Printed Circuit Board), and then back-lights the unit. Point out a series of steps to assemble the tool.

The polarizing plate used in the module process serves to selectively transmit only light that is strongly attached to both sides of the LCD panel and vibrates in a specific direction among the light transmitted through the liquid crystal.

On the other hand, it is difficult to scratch or foreign matter on the surface of the polarizing plate in the process of transferring the polarizing plate to the LCD panel assembly plant. Therefore, after the polarizing plate is manufactured, a separate hobo film (Protecting Film) is attached to the polarizing plate. Of course, when the process of attaching the actual polarizing plate proceeds in a state where the protective film is peeled off.

Initially, the worker has peeled off the protective film attached to the polarizing plate by manual labor. However, due to the limitations of manual work, the production efficiency is inevitably lowered. In recent years, a process of peeling a protective film in a polarizing plate attaching device is provided. A polarizer attachment device has been proposed to proceed.

In such a polarizing plate attachment device, the peeling head unit equipped with the adhesive tape is in charge of the step of substantially peeling off the protective film. Accordingly, when the polarizing plate with the protective film is loaded on the work line where the protective film is peeled off, the peeling head unit approaches the polarizing plate, and then the adhesive tape provided on the peeling head unit is adhered to the protective film. When the peeling head unit is retracted, the protective film may be peeled off from the polarizing plate.

Therefore, the peeling head unit includes a supply roller for supplying a new adhesive tape, a contact roller for contact-pressing the adhesive tape to the surface of the protective film so that the adhesive tape can be adhered to the protective film, and used for peeling the protective film. It is equipped with a recovery roller and the like for recovering the spent waste adhesive tape. In addition, the supply roller and the recovery roller is provided with a driving means for driving each of the supply roller and the recovery roller independently.

Thus, when the peeling process of the protective film is started, the supply roller and the recovery roller are respectively driven to rotate within a predetermined range, so that a part of the new adhesive tape released from the supply roller is directed to the outer surface of the contact roller, Used waste adhesive tape can be recovered to the recovery roller.

At this time, in order for the waste adhesive tape to be properly collected by the recovery roller, it is necessary to match the unwinding speed of the adhesive tape in the supply roller with the winding speed of the waste adhesive tape in the recovery roller.

Otherwise, when the unwinding speed and the unwinding speed do not coincide, the adhesive tape may be loosely disposed on the path connecting the feed roller and the recovery roller, and thus, the peeling process of the protective film may not be performed smoothly. May cause process defects.

By the way, in the prior art, in order to match the unwinding speed of the adhesive tape in the feed roller and the winding speed of the waste adhesive tape in the recovery roller, synchronous control has been performed for the rotation of the feed roller and the recovery roller. Is actually a very difficult and complex disadvantage.

More specifically, in order to match the unwinding speed and the winding speed between the feed roller and the recovery roller, even if both the supply roller and the recovery roller are initially the same size, the amount of the adhesive tape wound on the feed roller and the recovery roller is sometimes Will change. That is, although the total diameter of the supply roller, which is often wound with a new adhesive tape, is larger than that of the recovery roller, when the peeling process of the protective film proceeds, the entire diameter of the recovery roller, where the waste adhesive tape is wound, is transferred to the supply roller. It becomes larger than that. Therefore, in consideration of this point, the recovery roller should be rotated faster than the supply roller first, and later the recovery roller should be rotated faster than the supply roller. However, this synchronous control is practically very difficult and complicated. Otherwise, the tension of the adhesive tape located on the path connecting the supply roller and the recovery roller becomes difficult to maintain constantly, which may cause various process defects such as the peeling process of the protective film may not be performed smoothly. There is this.

SUMMARY OF THE INVENTION An object of the present invention is to provide a protective film peeling head unit and a polarizing plate attaching device having the same, capable of appropriately collecting the waste adhesive tape without difficult and complicated synchronous control of the rotation of the supply roller and the recovery roller.

The object is, according to the present invention, while supplying an adhesive tape for peeling off the protective film from the polarizing plate, the supply roller is wound around the circumferential surface; A recovery roller for recovering the waste adhesive tape used to peel the protective film; A contact roller provided between the supply roller and the recovery roller, the contact roller receiving the adhesive tape from the supply roller and contacting and pressing the adhesive tape to the surface of the protective film; And tensioning the adhesive tape and the waste adhesive tape by pressing the waste adhesive tape on the imaginary path connecting the supply roller and the recovery roller, and pressurizing the waste adhesive tape based on the amount of release of the adhesive tape released from the supply roller. It is achieved by a protective film peeling head unit comprising a tension adjusting buffer for adjusting the tension).

Here, the tension control buffer unit may be provided between the contact roller and the recovery roller.

The tension control buffer unit may include: a main tension roller in contact with a surface of the waste adhesive tape passing between the contact roller and the recovery roller; A moving bar coupled to the main tension roller and moving together with the main tension roller; And an elastic member coupled to the moving bar, the main tension roller being elastically biased to press the waste adhesive tape.

The main tension roller may be in contact with the inner surface of the waste adhesive tape, the elastic member is a compression spring, may be elastically biased to press the waste adhesive tape to the outside.

The tension adjusting buffer part is disposed on both sides of the main tension roller to form a movement path of the waste adhesive tape toward the main tension roller, but a pair of maintaining the tension of the waste adhesive tape together with the main tension roller. It may further include an auxiliary tension roller.

The tension adjusting buffer unit may be provided in plural, each of the movement bars of the plurality of tension adjusting buffer units may be connected to each other by a connecting unit, and the plurality of tension adjusting buffer units may share one elastic member.

The tension control buffer unit may include: a main tension roller in contact with an inner surface of the waste adhesive tape passing between the contact roller and the recovery roller; And a tension roller driving unit coupled to the main tension roller to move the main tension roller, and pressurizing the waste adhesive tape based on the amount of release of the adhesive tape released from the supply roller.

The tension control buffer unit elastically pressurizes the waste adhesive tape by the amount of loosening of the adhesive tape released from the feed roller, but the pressing force for elastically pressing the waste adhesive tape is a predetermined adhesive tape and the waste adhesive It may be substantially the same as the tension of the tape.

On the other hand, the object is, according to the present invention, a polarizing plate supply unit for supplying a polarizing plate with a protective film on at least one surface to a working position where the protective film is peeled off; And a protective film peeling head unit coupled to any one side of the polarizing plate supply unit so as to be movable to the working position together with the polarizing plate supplying unit, and separating the protective film from the polarizing plate at the working position. The unit supplies a pressure-sensitive adhesive tape for peeling off the protective film from the polarizing plate, the supply roller is wound around the circumferential surface; A recovery roller for recovering the waste adhesive tape used to peel the protective film; A contact roller provided between the supply roller and the recovery roller, the contact roller receiving the adhesive tape from the supply roller and contacting and pressing the adhesive tape to the surface of the protective film; And tensioning the adhesive tape and the waste adhesive tape by pressing the waste adhesive tape on the imaginary path connecting the supply roller and the recovery roller, and pressurizing the waste adhesive tape based on the amount of release of the adhesive tape released from the supply roller. It is also achieved by a polarizer attachment device comprising a tension adjustment buffer portion for adjusting the tension).

Here, the tension control buffer unit may be provided between the contact roller and the recovery roller.

The tension control buffer unit may include: a main tension roller in contact with a surface of the waste adhesive tape passing between the contact roller and the recovery roller; A moving bar coupled to the main tension roller and moving together with the main tension roller; And an elastic member coupled to the moving bar, the main tension roller being elastically biased to press the waste adhesive tape.

The tension adjusting buffer part is disposed on both sides of the main tension roller to form a movement path of the waste adhesive tape toward the main tension roller, but a pair of maintaining the tension of the waste adhesive tape together with the main tension roller. It may further include an auxiliary tension roller.

The tension control buffer unit may be provided in plural, each of the movement bars of the plurality of tension control buffer units may be connected to each other by a connecting unit, and the plurality of tension control buffer units may share one elastic member.

A head unit support part to which the protective film peeling head unit is detachably coupled may be provided in a front upper region of the polarizing plate supply unit, and a polarizing plate adsorption die for absorbing the polarizing plate, and the polarizing plate to which the protective film peeling head unit is coupled. The supply parts are arranged on both sides of the working position to be mutually accessible and spaced toward the working position.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, the present invention will be described in detail by explaining preferred embodiments of the present invention with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

1 is a block diagram of a polarizing plate attachment device according to an embodiment of the present invention, Figure 2 is a schematic partial enlarged perspective view of the polarizing plate attachment device of Figure 1, Figures 3 to 5 is a polarizing plate attachment device of FIG. Figures are shown in stages the process of peeling the protective film through.

As shown in these figures, the polarizing plate attaching apparatus according to the embodiment of the present invention includes a polarizing plate attaching part 70 provided with a movable polarizing plate adsorption die 75 and a polarizing plate supplying part 20. As will be described later in detail, the polarizing plate supply unit 20 is coupled to the protective film peeling head unit 10 is provided with a tension control buffer unit 90 for adjusting the tension (tension) of the adhesive tape (T).

The polarizing plate attachment portion 70 and the polarizing plate supply portion 20 have a work line having a work position 60 at which the protective film F (see FIGS. 3 to 5) is peeled off with respect to the polarizing plate P (see FIGS. 3 to 5). It is provided on the 50, it is provided so as to be mutually approachable and spaced apart toward the working position 60 from both sides of the working position 60.

The polarizing plate attaching part 70 is a part which attaches the polarizing plate P from which the protective film F was peeled off to one side of an LCD panel (not shown). Therefore, the polarizing plate attachment portion 70 is provided with, for example, a portion holding the LCD panel, a portion supporting the polarizing plate P, and a portion attaching the polarizing plate P to the LCD panel.

However, the present embodiment recovers the waste adhesive tape T1 while maintaining a constant tension of the adhesive tape T used to peel off the protective film F attached to one surface of the polarizing plate P. Since the core is aligned to the configuration and the operation thereof, the polarizing plate adsorption die 75, which is a structure for supporting the polarizing plate P in the polarizing plate attachment portion 70, will be described mainly, but the specific structure of the polarizing plate attachment portion 70 will be described. And description will be omitted.

The polarizing plate supply part 20 is a part which supplies the polarizing plate P in which the protective film F was not peeled to the working position 60. FIG. The polarizing plate supply unit 20 transfers the polarizing plate P along the work line 50 in a state in which the polarizing plate P is held by a predetermined vacuum adsorption method or the like, and thus the polarizing plate adsorption die 75 on the working position 60. The polarizing plate P is supplied to it.

As described above, the polarizing plate supply unit 20 supplies an adhesive tape T adhered to the protective film F in order to peel the protective film F, and the use of the polarizing plate supply unit 20 is completed for peeling the protective film F. The protective film peeling head unit 10 which collect | recovers the waste adhesive tape T1 (refer FIG. 7) from which the adhesive force was exhausted is combined. Therefore, when the polarizing plate supply unit 20 moves to the working position 60 or returns to the original position, the protective film peeling head unit 10 also moves together.

In the case of supplying the polarizing plate P, in this embodiment, the polarizing plate adsorption die 75 of the polarizing plate attachment part 70 and the polarizing plate supply unit 20 to which the protective film peeling head unit 10 are coupled to the working position 60 are mutually connected. Moving in the direction of approach, when the operation is completed, the polarizing plate supply unit 20 to which the polarizing plate adsorption die 75 and the protective film peeling head unit 10 are combined is returned to the original position. This series of movements can be controlled by a so-called linear motor (not shown).

In other words, the polarizing plate supply unit 20 moves to the intermediate position of the initial position of the polarizing plate attaching unit 70 and the polarizing plate supplying unit 20 (0.5L), and the polarizing plate adsorption of the polarizing plate attaching unit 70 before and after or at the same time. Die 75 also moves to an intermediate position. Then, the polarizing plate supply unit 20 retreats to the initial position direction of the polarizing plate supply unit 20, so that the protective film peeling head unit 10 provided on the upper surface of the polarizing plate supply unit 20 is positioned on the polarizing plate adsorption die 75 ( Move to match the end of P). Then, while the protective film peeling head unit 10 is in contact with the protective film F on the upper side of the polarizing plate P, the polarizing plate supply unit 20 moves to its original position (0.5L), and at the same time before and after or simultaneously with the polarizing plate adsorption. The die 75 is also able to peel off the protective film F on the upper portion of the polarizer by moving to the original position (0.5L).

As described above, the structure of the apparatus is simplified by combining the protective film peeling head unit 10 with the polarizing plate supply unit 20 so as to move together with the polarizing plate supply unit 20 without providing the protective film peeling head unit 10 as an independent device. It can provide the effect of reducing the foot print caused by the independent device.

That is, in the polarizing plate attachment portion 70 and the polarizing plate supply portion 20 spaced apart from each other with the working position 60 therebetween, the polarizing plate adsorption die 75 and the polarizing plate supply portion 20 of the polarizing plate attachment portion 70. The protective film peeling head unit 10 is provided on one side of the prior art by supplying the polarizing plate (P) and peeling the protective film (F) while approaching and spaced apart from each other through the work line (50) with respect to the working position 60, respectively. There is an advantage that the movement distance (0.5L) can be further reduced. This significantly reduces the tact time.

A process of peeling the protective film F from the polarizing plate using the polarizing plate attaching device having such a configuration will be described with reference to FIGS. 3 to 5 as follows.

As shown in FIG. 3, the polarizing plate supply part 20 which vacuum-adsorbed the polarizing plate P with the protective film F is the initial position (B), and the polarizing plate adsorption die 75 in the polarizing plate attachment part 70 is carried out. ) Is located at the first position (A).

In this state, the polarizing plate supply unit 20 horizontally moves along the working line 50 to the area indicated by the dotted line of the working position 60 and supplies the polarizing plate P. FIG. At this time, the protective film peeling head unit 10 positioned on the upper side of the polarizing plate supply unit 20 is also moved to the working position 60 along the working line 50 together with the polarizing plate supplying unit 20. At the same time or before and after, the polarizing plate adsorption die 75 in the polarizing plate attachment portion 70 also moves horizontally along the working line 50 to the area indicated by the dotted line of the working position 60.

When the polarizing plate supply unit 20 and the protective film peeling head unit 10 reach the working position 60, as shown in FIG. 4, the vacuum is released to the polarizing plate P of the polarizing plate supply unit 20 so as to be vertically lowered. The polarizing plate P is placed into the polarizing plate adsorption die 75 located.

Next, when the polarizing plate adsorption die 75 holds the lower surface of the polarizing plate P through vacuum adsorption, and the polarizing plate P supplied thereto is fixedly supported by the polarizing plate adsorption die 75, the protective film peeling head unit 10 is Descend. At this time, the protective film peeling head unit 10 retreats slightly so that the contact roller 14 (see FIG. 6) of the protective film peeling head unit 10 coincides with the end of the polarizing plate P placed on the polarizing plate adsorption die 75. The polarizing plate supply unit 20 moves in the position direction.

With the contact roller 14 in contact with the protective film F, the protective film peeling head unit 10 is further lowered so that the ends of the contact roller 14 and the protective film F have complete surface contact. . At this time, the tilting part 30 coupled to the protective film peeling head unit 10 is operated, or at the same time, one of the O-rings 14a, which are buffers 14a provided at both ends of the contact roller 14, is provided. This shrinkage is such that the ends of the adhesive tape T and the protective film F have complete surface contact.

When the adhesive tape T is completely in surface contact with the protective film F, as shown in FIG. 5, the polarizing plate adsorption die 75 and the protective film peeling head unit 10 in opposite directions at the working position 60, respectively. The coupled polarizing plate supply unit 20 is spaced apart from each other to move to the initial position (A), (B).

In the process of moving the polarizing plate adsorption die 75 and the protective film peeling head unit 10 apart from each other in a direction opposite to each other, the protective film F starts to peel off with respect to the polarizing plate P. When the protective film F is completely peeled from the polarizing plate P, the end of the protective film F adheres to the adhesive tape T located on the outer surface of both contact rollers 14 and is along the protective film peeling head unit 10. You are dragged. The peeled protective film F attached to the adhesive tape T as described above is chucked by the chucking part 40 and separated from the protective film peeling head unit 10, and then falls by its own weight to fall down by the protective film recovery part. It recovers by descending to 80.

On the other hand, Figure 6 and Figure 7 is a view showing the operation of the tension control buffer unit of the protective film peeling head unit according to an embodiment of the present invention, respectively.

As described above, in order for the operation of peeling off the protective film F from the polarizing plate P to proceed organically, the adhesive tape T adhered to the protective film F is supplied, and the used waste adhesive tape is completed. A series of operations for recovering T1 should be performed, which is in charge of the protective film peeling head unit 10.

Referring back to FIG. 2, a pair of head unit supports 21 are provided in the upper front region of the polarizing plate supply unit 20, which is spaced by the width of the polarizing plate P, and the head unit supporting portions 21 are respectively protected. The film peeling head unit 10 is detachably coupled.

At this time, the pair of protective film peeling head unit 10 is detachably coupled to the inside of the head unit support portions 21, respectively. As described above, the entire protective film peeling head unit 10 may be detachably attached to the head unit support 21 at one time, thereby making it very easy to replace the adhesive tape T.

6 and 7, the protective film peeling head unit 10 is provided with a coupling member 38 so that the protective film peeling head unit 10 may be coupled to the head unit support portions 21. . Coupling member 38 is provided in the cutting slot (not shown) formed in the first plate (not shown), is coupled to the boss portion (not shown) of the head unit support 21. On the other hand, the pair of protective film peeling head unit 10 has a mutually symmetrical structure. Of course, the internal structure and the operation and function thereof are the same, but will be described below for the protective film peeling head unit 10.

The protective film peeling head unit 10 includes a unit body 11, a supply roller 12, a recovery roller 13, and a contact roller 14, as shown in FIGS. 6 and 7.

The adhesive tape T is wound around the supply roller 12, the collection roller 13, and the contact roller 14. As shown in FIG. Here, the adhesive tape T which is released from the supply roller 12 and supplied to the contact roller 14 is a new one, while the adhesive tape T facing the recovery roller 13 roll from the contact roller 14 is depleted of adhesive force. Closed adhesive tape T1. Therefore, hereinafter, these (T, T1) will be described separately for each.

The unit body 11 is composed of first and second plates (not shown) coupled to each other at predetermined intervals. In addition to the supply roller 12 and the recovery roller 13, a pair of guide bars 15 for guiding the coupling position of the protective film peeling head unit 10 to the head unit support part 21 are coupled to the first plate. have. The first plate has a larger area than the second plate.

The feed roller 12 is coupled to the plate surface of the first plate, and is a portion in which the adhesive tape T, which is not yet used, is wound (wound). Therefore, the new adhesive tape T passes through the contact roller 14 while being unwound through the first feed roller 12 and finally recovered to the recovery roller 13.

To this end, the feed roller 12 needs to be rotated independently, and the rotation of the feed roller 12 is in charge of the drive roller 22 for the feed roller. That is, by the separate control signal, the feed roller driver 22 adjusts the amount of loosening of the adhesive tape T by rotating the feed roller 12 in one direction.

The recovery roller 13 is provided in the central region of the plate surface of the first plate. The recovery roller 13 is used for peeling off the protective film F, and the waste adhesive tape T1 whose adhesive force is exhausted is recovered.

Like the feed roller 12, the recovery roller 13 is also controlled by the drive roller 33 for recovery roller.

Here, the supply roller drive unit 22 and the recovery roller drive unit 33 control the rotation of the supply roller 12 and the recovery roller 13 in the same direction, respectively, by separate control signals. However, the feed roller 12 and the recovery roller 13 may be controlled differently at the speed and timing of the operation.

The contact rollers 14 are provided at the ends of the first and second plates. The contact roller 14 receives the adhesive tape T unwound by a predetermined amount from the supply roller 12 and presses the adhesive tape T to the surface of the protective film F when the protective film F is peeled off. Do it.

In order for the adhesive tape T located on the outer surface of the contact roller 14 to be completely in surface contact with the protective film F, the protective film peeling head unit 10 is lowered to bring the contact roller 14 to the protective film F. Should be pressurized.

In order for the adhesive tape T located on the outer surface of the contact roller 14 to be completely in surface contact with the protective film F, the protective film peeling head unit 10 must be constantly tilted. It is preferable that the contact roller 14 has a buffering force.

To this end, both ends of the contact roller 14 in contact with the first and second plates may be further provided with a buffer (not shown) that doubles the buffering force for the contact roller 14 pressed by the protective film (F). . Anything may be applied as the buffer part, but it may be replaced with an O-ring having a certain elasticity.

A plurality of spacers 16 are further provided around the feed roller 12, the contact roller 14, and the recovery roller 13. The spacers 16 are provided between the first and second plates so that both ends thereof are fixed to the first and second plates, respectively, so as to space the first and second plates apart from each other. In addition, the spacers 16 are used to provide a constant tension so that the adhesive tape T and the waste adhesive tape T1 passing through the feed roller 12, the contact roller 14, and the recovery roller 13 do not sag. Is more utilized. Referring to the drawings, the adhesive tape T and the waste adhesive tape T1 are supported by the spacers 16 in addition to the supply roller 12, the adhesive roller and the recovery roller 13, and wound up in a taut state.

On the other hand, in the case of the prior art described above, the feed roller 12 and the recovery roller 13 driven independently of each other so that the unwinding of the adhesive tape T and the winding speed of the waste adhesive tape T1 can be matched. Synchronous control of speed was very difficult and complicated. Therefore, if the synchronous control is not performed properly, the adhesive tape (T) and the waste adhesive tape (T1) may be loose in a loose state. In this case, the peeling process of the protective film (F) may not be performed smoothly or And defects in various processes, such as waste adhesive tape (T1) not being properly recovered to the recovery roller 13, were high.

Therefore, in this embodiment, even if synchronous control is not performed to match the unwinding speed of the adhesive tape T in the feed roller 12 and the winding speed of the waste adhesive tape T1 in the recovery roller 13, the feed roller ( 12) and the tension of the adhesive tape T and the waste adhesive tape T1 located on the path connecting the recovery roller 13 can be kept constant. In the present embodiment, as described later, the above-mentioned problem is solved through the tension control buffer unit 90 having a simple configuration. However, the tension control buffer unit 90 is not limited to the configuration of the present embodiment, various structures may be derived.

The tension adjusting buffer unit 90 is provided on an imaginary path connecting the supply roller 12 and the recovery roller 13, and the adhesive tape T is released from the supply roller 12 toward the contact roller 14. It acts to adjust the overall tension of the tapes (T, T1) by pressing the waste adhesive tape (T1) based on the amount of loosened.

In other words, the tension adjusting buffer 90 elastically presses the waste adhesive tape T1 by the amount of release of the adhesive tape T released from the feed roller 12 toward the contact roller 14. T, T1) to adjust the overall tension.

To this end, the tension control buffer unit 90 is provided at a position capable of elastically pressing the waste adhesive tape T1, and is provided between the contact roller 14 and the recovery roller 13 in this embodiment. .

The tension control buffer unit 90 includes a main tension roller 91, a moving bar 92, an elastic member 93, and a pair of auxiliary tension bars 95.

The main tension roller 91 is in contact with the inner surface of the waste adhesive tape T1 via the contact roller 14 and the recovery roller 13. Like a pair of auxiliary tension bars 95, it takes a substantially cylindrical shape.

The moving bar 92 is coupled to the main tension roller 91 to move together with the main tension roller 91. Therefore, the main tension roller 91 may be coupled to the end surface of the movable bar 92, or the movable bar 92 may be coupled to the side surface of the main tension roller 91.

The elastic member 93 serves to maintain the tension by providing the elastic force to the main tension roller 91 through the moving bar 92, the waste adhesive tape (T1) due to the main tension roller (91).

The elastic member 93 is elastic in the direction in which the main tension roller 91 presses the waste adhesive tape T1 to the outside by being coupled to the moving bar 92 at the other end thereof while the one end is fixed to the support wall 94. Bias. As the elastic member 93, a compression spring may be applied. In the figure of a perspective view, the elastic member 93 is abbreviate | omitted for convenience of drawing.

For reference, if the interval between the contact roller 14 and the recovery roller 13 is narrow or the amount of loosening of the adhesive tape T released from the supply roller 12 is small, only one tension adjusting buffer unit 90 is provided. Can be.

However, if the amount of unwinding of the adhesive tape T released from the feed roller 12 is large, the expansion force of the elastic member 93 should be increased, and the moving distance of the moving bar 92 and the main tension roller 91 is also increased. Should increase. In this case, one tension control buffer unit 90 may be difficult to perform a smooth operation.

Therefore, in the present embodiment, in consideration of this point, two tension adjusting buffer sections 90 are provided between the contact roller 14 and the recovery roller 13 so as to be spaced apart from each other. By providing the two tension control buffer unit 90 as described above, it is possible to reduce the expansion force of the elastic member 93, and also to keep the moving distance of the moving bar 92 and the main tension roller 91 short. Of course, if necessary, the number of the tension adjustment buffer unit 90 may be provided with three or more.

If two tension control buffer units 90 are provided as in this embodiment, it may be desirable to control the movement of each main tension roller 91 by using one elastic member 93. Only then can the number of parts be reduced.

To this end, in the present embodiment, after connecting the moving bar 92 provided in each of the two tension control buffer unit 90 by the connecting portion 96, each main tension roller by a single elastic member 93 The movement of 91 is controlled. However, the present invention is not limited thereto, and each tension control buffer unit 90 may be provided with an elastic member 93 so that individual operations may be performed.

The pair of auxiliary tension rollers 95 are disposed on both sides of the main tension roller 91 to form a movement path of the waste adhesive tape T1 toward the main tension roller 91, but together with the main tension roller 91. It serves to maintain the tension of the waste adhesive tape (T1).

The pair of auxiliary tension rollers 95 contact the outer surface of the waste adhesive tape T1 via the contact roller 14 and the recovery roller 13. Therefore, from the standpoint of the waste adhesive tape T1, after passing through the outer surface of the main tension roller 91 in contact with the inner surface of one of the auxiliary tension rollers 95, the inner surface of the remaining auxiliary tension rollers 95 is again present. It may be arranged in the form of contacting.

While the main tension roller 91 is coupled to the moving bar 92 and moved together with the moving bar 92, the pair of auxiliary tension rollers 95 are fixed directly to the unit body 11. Of course, if necessary, the auxiliary tension rollers 95 may be excluded from the configuration.

Referring to the operation of the tension control buffer unit 90 in the protective film peeling head unit 10 having such a configuration as follows.

First, in order for the peeling operation of the protective film F described with reference to FIGS. 3 to 5 to proceed, first, a new adhesive tape T should be disposed on the outer surface of the contact roller 14.

To this end, the feed roller driver 22 is operated to rotate the feed roller 12 in one direction. Then, the adhesive tape T wound on the outer surface of the feed roller 12 is unwound by a predetermined amount. At this time, the collecting roller drive unit 33 does not operate.

When the adhesive tape T is unwound by a predetermined amount in the feed roller 12 as described above, the tension formed on the tapes T and T1 is weakened. Therefore, the elastic member 93 which elastically presses the waste adhesive tape T1 through the main tension roller 91 expands.

The degree of expansion of the elastic member 93 is advanced by the amount of loosening of the adhesive tape T to be released from the feed roller 12 toward the contact roller 14. That is, as the adhesive tape T is released from the supply roller 12, the elastic member 93 expands and pushes the main tension roller 91 through the moving bar 92, and as a result, the main tension roller 91 Since the pressure-sensitive adhesive tape T1 is pushed outward, even if the adhesive tape T is released from the feed roller 12, the tension formed on the tapes T and T1 is not weakened, so that the tension is always kept constant. (See FIG. 8).

Next, when the adhesive tape T is loosened to some extent in the supply roller 12 and a new adhesive tape T is disposed on the outer surface of the contact roller 14, the operation of the supply roller driving part 22 is stopped to supply the roller. The rotation of 12 stops.

When the rotation of the feed roller 12 is stopped, the drive roller 33 for recovery rollers is driven to forcibly rotate the recovery roller 13 in one direction. At this time, the drive roller 33 for recovery roller is a torque that is relatively larger than the elastic expansion force of the elastic member 93, forcibly rotating the recovery roller 13 in one direction over the elastic force of the elastic member 93.

When the recovery roller 13 rotates by the drive roller 33 for recovery rollers, the elastic member 93 begins to be compressed by the rotational torque, which causes the movable bar 92 and the main tension roller 91 to be rearward. Pushed. Through this process, the waste adhesive tape T1 supported by the main tension roller 91 and the pair of auxiliary tension rollers 95 begins to be wound on the recovery roller 13.

At the end of the winding operation, since the main tension roller 91 presses the waste adhesive tape T1 to the outside, even if the recovery roller 13 winds the waste adhesive tape T1 to some extent, the tension is not weakened and is always taut. Will be able to maintain. In this embodiment, when the main tension roller 91 finally returns to the original position, the operation of the recovery roller drive unit 33 is stopped to stop the rotation of the recovery roller 13 (see Fig. 9).

In this way, after the new adhesive tape T is released from the supply roller 12 and supplied to the outer surface of the contact roller 14, after the amount of the waste adhesive tape T1 is completely recovered to the recovery roller 13, 3 to 5 described above proceeds the peeling process of the protective film (F). Then, the feed roller drive unit 22 again operates to rotate the feed roller 12 in one direction, and the above-described process is repeated.

As described above, according to the present invention, even if the rotation of the feed roller 12 and the recovery roller 13 is not synchronized, the adhesive tape T, which is located on the path connecting the supply roller 12 and the recovery roller 13, The tension of T1) can be kept constant and can be supplied to the contact roller 14 and recovered from the contact roller 14.

Accordingly, the tension of the adhesive tapes T and T1 may not be maintained, such as the peeling process of the protective film F may not be performed smoothly, or the waste adhesive tape T1 may not be properly collected in the recovery roller 13. It is possible to prevent various process defects caused by the failure.

In the above-described embodiment, the elastic member is applied to the tension adjusting buffer part, but the tension roller drive unit coupled to the main tension roller to drive the main tension roller may press the waste adhesive tape by the amount of loosening of the adhesive tape released from the supply roller. If you can, you can apply it.

As described above, the present invention is not limited to the described embodiments, and various modifications and changes can be made without departing from the spirit and scope of the present invention, which will be apparent to those skilled in the art. Therefore, such modifications or variations will have to be belong to the claims of the present invention.

As described above, according to the present invention, the waste adhesive tape can be appropriately collected without difficult and complicated synchronous control of the rotation of the supply roller and the recovery roller. As a result, various process defects caused by inability to maintain the tension of the adhesive tape, such as the peeling process of the protective film not being smoothly performed or the waste adhesive tape not properly collected in the recovery roller, can be prevented. .

Claims (14)

Supplying a pressure-sensitive adhesive tape for peeling off the protective film from the polarizing plate, the supply roller is wound around the circumferential surface; A recovery roller for recovering the waste adhesive tape used to peel the protective film; A contact roller provided between the supply roller and the recovery roller, the contact roller receiving the adhesive tape from the supply roller and contacting and pressing the adhesive tape to the surface of the protective film; And Tension of the adhesive tape and the waste adhesive tape is provided on an imaginary path connecting the supply roller and the recovery roller, and pressurizes the waste adhesive tape based on the amount of release of the adhesive tape released from the supply roller. It includes a tension control buffer for adjusting), The tension control buffer unit, A main tension roller in contact with the surface of the waste adhesive tape passing between the contact roller and the recovery roller; A moving bar coupled to the main tension roller and moving together with the main tension roller; And A protective film peeling head unit coupled to the moving bar, wherein the main tension roller includes an elastic member elastically biased to press the waste adhesive tape. delete delete The method of claim 1, The main tension roller is in contact with the inner surface of the waste adhesive tape, The elastic member is a compression spring, the protective film peeling head unit, characterized in that the elastic biased to press the waste adhesive tape to the outside. The method of claim 4, wherein The tension adjusting buffer part is disposed on both sides of the main tension roller to form a movement path of the waste adhesive tape toward the main tension roller, but a pair of maintaining the tension of the waste adhesive tape together with the main tension roller. The protective film peeling head unit, further comprising an auxiliary tension roller. The method of claim 1, The tension control buffer unit is provided in plurality, Each of the moving bars of the plurality of tension control buffer units are interconnected by a connecting unit, and the plurality of tension control buffer units share a single elastic member. Supplying a pressure-sensitive adhesive tape for peeling off the protective film from the polarizing plate, the supply roller is wound around the circumferential surface; A recovery roller for recovering the waste adhesive tape used to peel the protective film; A contact roller provided between the supply roller and the recovery roller, the contact roller receiving the adhesive tape from the supply roller and contacting and pressing the adhesive tape to the surface of the protective film; And Tension of the adhesive tape and the waste adhesive tape is provided on an imaginary path connecting the supply roller and the recovery roller, and pressurizes the waste adhesive tape based on the amount of release of the adhesive tape released from the supply roller. It includes a tension control buffer for adjusting), The tension control buffer unit, A main tension roller in contact with an inner surface of the waste adhesive tape passing between the contact roller and the recovery roller; And A protective film peeling head coupled to the main tension roller to move the main tension roller, and a tension roller driving unit configured to press the waste adhesive tape based on the amount of release of the adhesive tape released from the supply roller. unit. The method according to claim 1 or 7, The tension control buffer unit elastically pressurizes the waste adhesive tape by the amount of loosening of the adhesive tape released from the feed roller, but the pressing force for elastically pressing the waste adhesive tape is a predetermined adhesive tape and the waste adhesive A protective film peeling head unit, characterized in that substantially the same as the tension of the tape. A polarizing plate supply unit for supplying a polarizing plate having a protective film on at least one surface to a work position where the protective film is peeled off; And A protective film peeling head unit coupled to any one side of the polarizing plate supply unit so as to be movable to the working position together with the polarizing plate supplying unit, and separating the protective film from the polarizing plate at the working position; The protective film peeling head unit, Supplying a pressure-sensitive adhesive tape for peeling off the protective film from the polarizing plate, the supply roller is wound around the circumferential surface; A recovery roller for recovering the waste adhesive tape used to peel the protective film; A contact roller provided between the supply roller and the recovery roller, the contact roller receiving the adhesive tape from the supply roller and contacting and pressing the adhesive tape to the surface of the protective film; And Tension of the adhesive tape and the waste adhesive tape is provided on an imaginary path connecting the supply roller and the recovery roller, and pressurizes the waste adhesive tape based on the amount of release of the adhesive tape released from the supply roller. Polarizing plate attachment device comprising a tension control buffer for adjusting the). The method of claim 9, And the tension control buffer unit is provided between the contact roller and the recovery roller. The method of claim 10, The tension control buffer unit, A main tension roller in contact with the surface of the waste adhesive tape passing between the contact roller and the recovery roller; A moving bar coupled to the main tension roller and moving together with the main tension roller; And The polarizing plate attachment device is coupled to the moving bar, the main tension roller comprises an elastically biased elastic member to press the waste adhesive tape. The method of claim 11, The tension adjusting buffer part is disposed on both sides of the main tension roller to form a movement path of the waste adhesive tape toward the main tension roller, but a pair of maintaining the tension of the waste adhesive tape together with the main tension roller. Polarizing plate attachment device further comprises an auxiliary tension roller. The method of claim 12, The tension control buffer unit is provided in plurality, The movable bars of the plurality of tension control buffer units are connected to each other by a connection unit, and the plurality of tension control buffer units share one elastic member. The method of claim 9, In the upper front region of the polarizing plate supply unit, a head unit support unit to which the protective film peeling head unit is detachably coupled is provided, And a polarizing plate adsorption die for adsorbing the polarizing plate and the polarizing plate supply unit coupled with the protective film peeling head unit, which are disposed at both sides of the working position and are mutually accessible and spaced toward the working position.

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