JPWO2017163495A1 - Optical film sticking device - Google Patents

Abstract

It is an object of the present invention to provide an optical film sticking apparatus that can also be used as an optical film having a different width by adjusting the tension according to the optical film. In the optical film sticking apparatus, a tension part for applying tension to the optical film and a tension adjusting part for adjusting the tension are installed. The tension adjusting unit adjusts the tension so that the tension when the wide optical film is used is larger than the tension when the narrow optical film is used.

Description

  The present invention relates to an optical film sticking apparatus, and in particular, an optical film sticking apparatus that can also be used as optical films having different widths.

  Currently, an optical display panel in which an optical film is attached to a glass substrate is used in an optical display device typified by a display. In order to efficiently manufacture such an optical display panel, an RTP (Roll to Panel) type optical film sticking apparatus for sticking an optical film as an optical film to a glass substrate is developed.

  Generally, the optical film sticking apparatus includes an optical film transport path for continuously transporting an optical film by a plurality of transport rollers. When pasting, the optical film is attached to the optical film supply unit in the optical film transport path in the form of an optical film roll. This optical film roll is formed by laminating a belt-shaped optical film and a carrier film and winding them into a roll. The laminated optical film and carrier film are fed out from the optical film supply unit, and conveyed to the pasting unit along the optical film path. The optical film laminated on the carrier film is cut into a length corresponding to the glass substrate, leaving only the carrier film, before being transported to the affixing section. The sticking part peels off the optical film from the carrier film and sticks it to the glass substrate. Thereafter, the remaining carrier film is conveyed to the carrier film collection unit and collected.

  The belt-shaped optical film corresponds to the long side or the short side of the glass substrate to which the width is attached. The optical film whose width corresponds to the long side of the glass substrate is an optical film having a long side width, and the optical film whose width corresponds to the short side of the glass substrate is an optical film having a short side width.

  Moreover, when using an optical film as an optical film, an optical film contains the optical film whose absorption axis is a longitudinal direction (MD), and the optical film whose absorption axis is a width direction (TD). The longitudinal direction and the width direction are for the belt-shaped optical film.

  In the conventional optical film sticking device, for example, as shown in Patent Document 1, the first sticking is performed on one surface of the glass substrate using an optical film having a long side whose absorption axis is the longitudinal direction, Thereafter, a pasting method is adopted in which the glass substrate is turned and reversed, and the second pasting is performed on the other surface of the glass substrate using an optical film having a short side whose absorption axis is the longitudinal direction.

  Moreover, as shown in Patent Document 2, the first sticking is performed on one surface of the glass substrate using an optical film having a long side width whose absorption axis is the longitudinal direction, and then the glass substrate is inverted. There is also an optical film sticking apparatus that employs a sticking method in which a second sticking is applied to the other surface of the glass substrate using an optical film having a long side width whose absorption axis is the width direction.

JP 2012-083690 A JP 2009-276757 A

  However, since the optical film sticking apparatus can adopt only a single sticking method, an optical film sticking apparatus that can cope with various sticking methods is expected. The optical film sticking apparatus is required to be able to use both an optical film having a long side width and an optical film having a short side width. However, when optical films having different widths are used, there is a possibility that the optical film sticking apparatus or the optical film may be adversely affected because the load on each transport roller by the optical film is different.

  For example, in order to use an optical film roll having a long side width, it is necessary to lengthen a transport roller for the optical film roll having a short side width. In this way, when an optical film having a short side width is conveyed by the elongated conveying roller, the load applied to each conveying roller by the optical film is concentrated at the center of the conveying roller, so that the conveying roller is bent. there is a possibility.

  This invention is made | formed in view of said subject, and it aims at providing the optical film sticking apparatus which can adjust tension according to an optical film and can also use the optical film from which width differs.

The optical film sticking apparatus according to the present invention is for manufacturing an optical substrate by sticking an optical film on a glass substrate,
A glass substrate transport path for transporting the glass substrate;
An optical film transport path for transporting the optical film;
Installed in the middle of the glass substrate transport path and the optical film transport path, and including a pasting part for pasting the optical film on the glass substrate,
The optical film transport path is:
An optical film supply unit for supplying the optical film;
A tension unit that is installed between the optical film supply unit and the pasting unit and applies tension to the optical film;
A tension adjusting unit for adjusting the tension is installed in the tension unit.
An optical film sticking apparatus.

Moreover, in the sticking device according to the present invention,
The optical film sticking device is also used as an optical film having a different width,
It is preferable that the tension adjusting unit adjusts the tension so that the tension when the optical film having a wide width is larger than the tension when the optical film having a narrow width is used.

Moreover, in the sticking device according to the present invention,
The tension part is
A support frame;
A fixed plate installed on the support frame so as to be vertically movable;
A tension shaft that is arranged so as to be orthogonal to the transport direction of the optical film, and is rotatably supported by the fixed plate;
A tension roller fixed to the center of the tension shaft and pressed against the optical film from above so as to add tension;
The tension adjusting unit includes a weight and a connecting member,
The fixing plate and the weight are respectively connected to both ends of the connecting member,
The connecting member suspends the fixing plate and the weight across a plurality of pulleys installed on the support frame,
It is preferable to adjust the tension by adjusting the weight of the weight.

Moreover, in the sticking device according to the present invention,
The weight includes a receiving portion and a plurality of weights,
Preferably, the receiving portion is connected to the connecting member, and the plurality of weights are set in the receiving portion.

  The optical film sticking apparatus according to the present invention includes a tension part and a tension adjustment part. Therefore, when an optical film having a different width is used, the tension can be adjusted by the tension adjustment part according to the optical film. Therefore, it is possible to adjust the load on each of the transport rollers and to prevent adverse effects on the optical film sticking apparatus or the optical film. Thereby, the optical film sticking apparatus which concerns on this invention can combine the optical film from which width differs.

FIG. 1 is a schematic diagram showing the overall configuration of the optical film sticking apparatus. FIG. 2 is a view of the tension unit and the tension adjustment unit viewed in a direction orthogonal to the conveyance direction of the optical film. FIG. 3 is a view of the tension unit and the tension adjustment unit viewed in the conveyance direction of the optical film.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. In this embodiment, an optical film sticking apparatus will be described by taking an RTP type optical film sticking apparatus as an example. In the following description, the upstream side and the downstream side mean the upstream side and the downstream side in the conveyance direction of the glass substrate 3.

  In this embodiment, the optical film includes an optical film L having a long side width and an optical film S having a short side width.

  With reference to FIG. 1, the whole structure of an optical film sticking apparatus is demonstrated. The optical film sticking device is divided into an upstream sticking mechanism A and a downstream sticking mechanism B along the conveyance direction of the glass substrate 3. The glass substrate transport path 2 for transporting the glass substrate 3 passes through the upstream pasting mechanism A and the downstream pasting mechanism B. An optical film is attached to one surface of the glass substrate 3 in the upstream attachment mechanism A, and an optical film is attached to the other surface of the glass substrate 3 in the downstream attachment mechanism B.

  Since the upstream sticking mechanism A and the downstream sticking mechanism B have almost the same structure, only the upstream sticking mechanism A will be described below.

  The upstream side sticking mechanism A is installed in the middle of the glass substrate transport path 2, the optical film transport path 1 for transporting the optical film, the glass substrate transport path 2 and the optical film transport path 1, and the optical film is attached to the glass substrate 3. And a pasting part 4 to be pasted.

  Hereinafter, the optical film conveyance path 1 will be described in detail.

  The optical film is transported to the optical film transport path 1 in the direction opposite to the transport direction of the glass substrate 3, that is, from the downstream side to the upstream side. The optical film transport path 1 includes an optical film supply unit 5 disposed at one end on the downstream side of the optical film transport path 1, a tension unit 6 disposed on the upstream side of the optical film supply unit 5, and a tension unit 6. The cutting part 7 arrange | positioned in the upstream and downstream from the sticking part 4 and the carrier film collection | recovery part 8 arrange | positioned in the upstream one end in the optical film conveyance path | route 1 are included.

  The optical film supply unit 5 has a structure including a roller that is rotatable. The optical film is mounted on this roller in the form of an optical film roll. The optical film roll is formed by laminating a belt-like optical film and a carrier film and winding the roll. By feeding the optical film roll, the optical film can be continuously supplied to the upstream side.

  The tension unit 6 applies tension to the optical film fed from the optical film supply unit 5. The tension unit 6 is provided with a tension adjusting unit that adjusts the tension. The tension unit 6 and the tension adjustment unit will be described in detail later.

  The cutting part 7 cuts the optical film laminated on the carrier film.

  The affixing unit 4 peels off the optical film from the carrier film and affixes it to the glass substrate 3.

  The carrier film collection unit 8 has a structure including a roller that is rotatable. The carrier film is collected by winding it on this roller.

  The optical film transport path 1 is provided with a plurality of transport rollers 9 that are rotatable to continuously transport the optical film between the above-described parts. In order to be able to transport optical films having different widths, each transport roller 9 is configured such that its length is larger than the width of the optical film L having a long side width.

  Next, with reference to FIG. 2 and FIG. 3, the tension part 6 and the tension adjustment part of an optical film sticking apparatus are demonstrated.

  The tension portion 6 includes a support frame F, a fixing plate 63, a tension shaft 61, and a tension roller 62.

  A tension shaft 61 is disposed inside the support frame F. Both ends of the tension shaft 61 pass through the support frame F, extend in the horizontal direction outside the support frame, and are rotatably supported by the fixed plate 63.

  The tension roller 62 is located inside the support frame F and is disposed at the center of the tension shaft 61. The tension roller 62 is configured such that its length is greater than the width of the optical film L having a long side width.

  The fixing plate 63 is formed in a rectangular shape and is disposed outside the support frame F. An upper plate 65 a and a lower plate 65 b are installed on the support frame F above and below the fixed plate 63, respectively. Between the upper plate 65a and the lower plate 65b, two guide rods 66 are installed in the upright direction. The two guide rods 66 are inserted into the insertion holes on both sides of the fixed plate 63 so that the fixed plate 63 can move freely in the upright direction along the two guide rods 66. As a result, the tension shaft 61 and the tension roller 62 can move up and down together with the fixed plate 63.

  In the above-described configuration, the tension roller 62 presses the optical film passing therebelow from above to apply tension to the optical film using the weight of the tension roller 62, the tension shaft 61, and the fixing plate 63. Further, since the fixing plate 63 can only move in the upright direction, the tension roller 62 can be prevented from swinging, and a stable tension can be applied to the optical film.

  The tension adjusting unit includes a belt-like connecting member 68 and a weight 69. One end of the connecting member 68 is connected to a portion of the upper portion of the fixed plate 63 directly above the axis of the tension shaft 61, and the other end is connected to the weight 69. The connecting member 68 suspends the fixing plate 63 and the weight 69 across the two pulleys 67a and 67b installed on the support frame F. The weight 69 includes a receiving portion 691 and a plurality of weights 692. The receiving portion 691 is connected to the connecting member 68, and a plurality of weights 692 are set on the receiving portion 691.

  In the above configuration, the weight 69 pulls up the fixing plate 63 through the connecting member 68 with its own weight. As described above, the tension applied to the optical film is obtained by subtracting the weight of the weight 69 from the weight of the tension roller 62, the tension shaft 61, and the fixing plate 63. Since the number of weights 692 can be freely increased or decreased, the weight of the weight 69 can be adjusted freely. Thereby, the tension applied to the optical film can be freely adjusted.

  Therefore, when using optical films with different widths according to the above configuration, the tension can be appropriately adjusted by the tension adjusting unit. Specifically, the tension adjusting unit adjusts the tension so that the tension when the wide optical film is used is larger than the tension when the narrow optical film is used. By adjusting the tension in this way, it is possible to appropriately adjust the load applied to each transport roller 9 by the optical film, and to prevent adverse effects on the optical film sticking device or the optical film.

  Hereinafter, each adjustment method in the case of using the optical film L of a long side width and the optical film S of a short side width is demonstrated to an optical film sticking apparatus.

  When the long side width optical film L is used, the tension applied to the long side width optical film L is increased by reducing the number of weights 692. Thus, the conveyance of the optical film becomes more stable.

  When the optical film S having a short side width is used, the load on the tension shaft 61 due to the optical film is concentrated at the center and both ends. Therefore, by increasing the number of weights 692, the optical film S having a short side width is increased. Reduce the tension applied to the. Thus, the load on the tension shaft 61 by the optical film can be reduced, and the bending of the tension shaft 61 can be prevented.

  Therefore, the optical film sticking apparatus in this embodiment can also use optical films having different widths by adjusting the tension by the tension adjusting unit according to the optical film.

  The present invention is not limited to the specific embodiments as described above, and various modifications can be made within the scope of the technical concept of the present invention. Such changes are also included in the scope of the present invention.

  For example, in the above-described embodiment, the tension adjusting unit includes a connecting member and a weight, but a tension adjusting unit having another structure may be used. For example, a receiving part for setting a weight may be installed on the fixed plate. Thus, by increasing or decreasing the number of weights, the weight of the fixed plate can be adjusted, and the tension can also be adjusted.

DESCRIPTION OF SYMBOLS 1 Optical film conveyance path 2 Glass substrate conveyance path 3 Glass substrate 4 Sticking part 5 Optical film supply part 6 Tension part 7 Cutting part 8 Carrier film collection | recovery part 9 Conveyance roller 61 Tension shaft 62 Tension roller 63 Fixed plate 64 Bearing 65a Upper plate 65b Lower plate 66 Guide rod 67a, 67b Pulley 68 Connecting member 69 Weight 691 Receiving portion 692 Weight F Support frame A Upstream side pasting mechanism B Downstream side pasting mechanism L Long side width optical film S Short side width optical film

Claims (4)

An optical film sticking apparatus for producing an optical substrate by sticking an optical film on a glass substrate,
A glass substrate transport path for transporting the glass substrate;
An optical film transport path for transporting the optical film;
Installed in the middle of the glass substrate transport path and the optical film transport path, and including a pasting part for pasting the optical film on the glass substrate,
The optical film transport path is:
An optical film supply unit for supplying the optical film;
A tension unit that is installed between the optical film supply unit and the pasting unit and applies tension to the optical film;
A tension adjusting unit for adjusting the tension is installed in the tension unit.
An optical film sticking apparatus. The optical film sticking device is also used as an optical film having a different width,
The tension adjusting unit adjusts the tension so that the tension when using a wide optical film is larger than the tension when using a narrow optical film,
The optical film sticking apparatus according to claim 1. The tension part is
A support frame;
A fixed plate installed on the support frame so as to be vertically movable;
A tension shaft that is arranged so as to be orthogonal to the transport direction of the optical film, and is rotatably supported by the fixed plate;
A tension roller fixed to the center portion of the tension shaft and press-contacted from above so as to add tension to the optical film,
The tension adjusting unit includes a weight and a connecting member,
The fixing plate and the weight are respectively connected to both ends of the connecting member,
The connecting member suspends the fixing plate and the weight across a plurality of pulleys installed on the support frame,
Adjusting the weight by adjusting the weight of the weight;
The optical film sticking apparatus according to claim 1 or 2, wherein The weight includes a receiving portion and a plurality of weights,
The receiving portion is connected to the connecting member, and the plurality of weights are set in the receiving portion.
The optical film sticking device according to claim 3.

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