JPH1034476A - Sheet sticking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polarizing plate sticking device capable of automatically and safely sticking large size polarizing plate to a liquid crystal panel. SOLUTION: A polarizing plate 102 held between a roller 104 and a liquid crystal panel 101, which is fixed on a slider 103, is stuck on the liquid crystal panel 101 with the movement of the slider 103 in the A direction. A suction slider 110, which moves on a suction plate 106 in parallel with the slider 103, sucks and holds the edge of the polarizing plate 102, which is not yet stuck. At the same time when the suction slider 110 reaches the detection position of a sensor 112, the suction of the edge of the polarizing plate 102 stops and the sticking of the edge of the polarizing plate 102 is completed, and the suction slider 110 is made to return to the initial position by the restoring force of the spring 109.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an apparatus for automatically attaching a thin plate to a surface of a panel body such as a liquid crystal panel in a manufacturing process of the panel body.

[0002]

2. Description of the Related Art For example, in a manufacturing process of a liquid crystal panel used for a color liquid crystal television, a polarizing plate sticking apparatus for sticking a polarizing plate to a surface of the liquid crystal panel is used. As shown in FIG. 3, this type of polarizing plate sticking apparatus is composed of a pair of a lower system and an upper system. The lower system includes a first slider 303 which conveys the liquid crystal panel 301 positioned on its upper surface while adsorbing and holding the liquid crystal panel 301 in the attaching direction. On the other hand, the polarizing plate 302 to be affixed to the upper system is
, A roller 304 for holding and pressing the polarizing plate 302 on the liquid crystal panel 301, a block 308 for holding the roller 304 and the suction plate 306, and a block 308 from above. It consists of a supporting second slider 305.

A polarizing plate 3 is provided on the lower surface of the suction plate 306.
A plurality of suction pads 307 for sucking 07 are fixed. The upper system is composed of a second slider 305 fixed independently of the first slider 303 moving in the attaching direction.
Raises and lowers the block 308, and can adjust the sandwiching of the polarizing plate 302 by the roller 304 supported by the block 308 and release the polarizing plate 302.

The operation of the polarizing plate sticking apparatus 3 having the above configuration is as follows. First, the positioned liquid crystal panel 301
Is moved to the sticking position by the first slider 303. Thereafter, the suction plate 306 holding the polarizing plate 302 from which the separator has been peeled off is held by the second slider 305.
As a result, the polarizing plate 302 is sandwiched between the liquid crystal panel 301 and the roller 304. Then, suction other than the head suction pad 307 is stopped, and the first slider 303 is caused to travel. Thus, the polarizing plate 302 is attached to the liquid crystal panel 301.

[0005]

However, in the conventional polarizing plate sticking apparatus 3, as the size of the polarizing plate 302 increases, the edge of the polarizing plate 302 and the suction pad 307 become larger.
When the suction other than the first suction pad is stopped, the edge of the polarizing plate 302 hangs down and comes into contact with the liquid crystal panel 301, causing uneven adhesion or a gap between the polarizing plate 302 and the liquid crystal panel 301. There was a problem that air bubbles were generated.

In addition, since the leading suction pad 307 has been sucked until the end of the attachment, a trace of dragging the suction pad 307 is formed on the polarizing plate 302, and it is difficult to distinguish the unevenness from the display unevenness of the liquid crystal panel 301. There was a problem of making it difficult. Such a problem similarly occurs in an apparatus for attaching a thin plate to a panel body other than a liquid crystal panel by a similar mechanism, and improvement has been desired.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an improved thin sheet sticking apparatus capable of appropriately and efficiently sticking a thin sheet to a panel body.

[0008]

SUMMARY OF THE INVENTION The present invention provides a polarizing plate sticking apparatus which solves the above-mentioned problems. This polarizing plate sticking apparatus includes a moving table fixed on a panel body and movable in a fixed direction, and a thin plate attached to the surface of the panel body fixed to the moving table while pressing the thin plate from above. A pressure roller and suction holding means for sucking and holding an unattached portion of the thin plate, wherein the suction holding means is arranged in parallel with the movable table while sucking and holding an end of the unsticked portion of the thin plate. And a moving adsorber for moving the end portion to a contact portion between the pressure roller and the thin plate, and releasing the end portion from suction of the moving adsorber at a predetermined position near the pressure roller. And a driving means for moving the movable adsorbent to an initial position for starting adsorption of a new thin plate.

Here, the driving means preferably has a sensor for detecting the moving adsorbent at a predetermined position near the pressure roller, and when the sensor detects the moving adsorbent, the driving means is connected to the end. It is configured to be released from the moving adsorbent. More preferably, it is configured to have an elastic body for pulling back the movable adsorbent to the initial position after further releasing the end.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment in which the present invention is applied to a polarizing plate sticking apparatus for sticking a polarizing plate to the surface of a liquid crystal panel will be described in detail.

FIG. 1 is a sectional view showing the configuration of a polarizing plate sticking apparatus according to one embodiment of the present invention. This polarizing plate sticking device 1
Is composed of a pair of an upper system and a lower system. The lower system is provided with a pulse-driven first slider 103 that conveys the liquid crystal panel 101 positioned on its upper surface while adsorbing and holding the liquid crystal panel 101 in the sticking direction (A direction in the drawing). On the other hand, in the upper system, a roller 104 for sandwiching the polarizing plate 102 between the liquid crystal panels 101 and applying pressure, a suction unit for sucking and holding the polarizing plate 102 so as to maintain a non-contact state on the liquid crystal panel 101, A block 108 that holds the roller 104 and the suction unit and a slider 105 that supports the block 108 from above are provided.

The suction section has a suction plate 106 fixed to a block 108 such that the lower surface thereof faces away from the surface to which the liquid crystal panel 101 is attached, and the suction plate 106.
A plurality of suction pads 107 fixed to the lower surface of the polarizing plate, a suction slider 110 which travels while holding an unattached end of the polarizing plate 102 in a sticking direction (direction A), and a suction slider 110 on the suction plate 106. And a guide rail 111 for guiding. On the upper surface of the end of the suction plate 106 closest to the roller 104, a suction slider 110 is provided.
A sensor 112 for detecting a suction stop position of the suction slider 1 is provided.
A conston spring 109 is provided, which pulls 10 with a constant load in a direction opposite to the attaching direction (A direction) and pulls it back to a predetermined initial position with an elastic restoring force.

In the upper system, a second slider 105 fixed independently of the lower system moving in the attaching direction (A direction) moves up and down the block 108, and sandwiches the polarizing plate 102 by the rollers 104 supported by the block 108. And the polarizing plate 102 can be released.

Next, the operation of the polarizing plate sticking apparatus 1 having the above configuration will be described in detail. First, in a state where the roller 104 is sufficiently separated from the liquid crystal panel 101, the polarizing plate 102 is sucked on the surface of the liquid crystal panel 101 by the suction pad 107 and the suction slider 110. At this time, the polarizing plate 10
2 is positioned so that the end of the roller 2 comes to the lowermost part of the roller 104.

Driving the second slider 105 to drive the block 1
08 and the roller 104 fixed to the suction plate 1
06 is lowered, and the polarizing plate 102 is sandwiched between the roller 104 and the liquid crystal panel 101 fixed on the first slider 103. Thereafter, the suction of the suction pad 107 is stopped, and the first slider 103 is driven to move the liquid crystal panel 101 in the direction A, which is the sticking direction. Roller 104
Is rotated in the forward direction, and the polarizing plate 102 is constantly
1, the suction slider 110 also moves in the direction A along the guide rail 111.

FIG. 2 is a view showing a state in which the polarizing plate 102 is pasted on the liquid crystal panel 101 halfway in the polarizing plate sticking apparatus 1. Since a force is constantly applied to the polarizing plate 110 in a direction opposite to the sticking direction (A direction) by the conston spring 109, there is no fear that the polarizing plate 102 will be loosened in the middle of sticking and come into contact with the liquid crystal panel to cause damage. Absent.

When the attachment proceeds further, the suction slider 1
10 reaches the detection position of the sensor 112. At this time,
The suction of the polarizing plate 102 by the suction slider 110 is released, and the attachment to the liquid crystal panel 101 is completed. After that, the suction slider 110 that has completed the suction is moved to the conston spring 109.
Is pulled back to its original position.

In this embodiment, the lower system, that is, the slider 103 is moved in the attaching direction, and the upper system is stationary in the attaching direction. Conversely, the upper system is moved in the attaching direction, and the lower system is stopped. It is also possible. The roller 104 was moved up and down using the slider 105. Instead, the roller 104 was stopped and the slider 1 was moved.
03 can also be moved up and down.

The present invention is also applicable to the case where a polarizing plate is attached to the surface of a panel body other than the liquid crystal panel, or the case where a thin plate other than the polarizing plate, for example, a protective plate is attached to the surface of the liquid crystal panel, as in the above embodiment. Can be applied.

[0020]

As is apparent from the above description, according to the present invention, when the thin plate is attached to the panel body, the end of the unattached portion of the thin plate follows the movement of the movable base. As a result, the end of the thin plate does not hang down on the panel body during sticking. In addition, since the sensor detects the moving adsorbent that holds the thin plate in the vicinity of the roller and releases the thin plate from the sucked state, there is no fear that the thin plate is damaged by the suction.

[Brief description of the drawings]

FIG. 1 is a configuration sectional view of a polarizing plate attaching apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory view of the operation of the polarizing plate sticking apparatus according to the present embodiment.

FIG. 3 is a cross-sectional view of the configuration of a conventional polarizing plate sticking apparatus.

[Explanation of symbols]

 1, 3 polarizing plate sticking device 101, 301 liquid crystal liquid crystal panel (liquid crystal panel) 102, 302 polarizing plate 103, 105, 303, 305 slider 104 roller 106, 306 suction plate 107a-f, 307a-f suction pad 108, 308 block 109 Conston spring 110 Suction slider 111 Guide rail 112 Sensor

Claims (3)

[Claims] A moving table fixed to the panel body and movable in a predetermined direction; a pressing roller for applying a thin plate to the surface of the panel body fixed to the moving table while pressing the thin plate from above; Suction holding means for sucking and holding the unattached portion of the thin plate, wherein the suction holding means moves in parallel with the movable table while sucking and holding the unsticked portion of the thin plate, and pressurizes the end portion. A moving adsorbent for guiding to a contact portion between a roller and the thin plate; and releasing the end from the adsorbing of the moving adsorbent at a predetermined position near the pressure roller, and starting releasing a new thin plate after the release. And a driving unit for moving the movable adsorbent to an initial position for performing the operation. 2. The driving means has a sensor for detecting the moving adsorbent at a predetermined position near the pressure roller. When the sensor detects the moving adsorbent, the driving means detects an unattached portion of the thin plate. The thin plate sticking apparatus according to claim 1, wherein an end portion is released from the movable adsorbent. 3. The driving device according to claim 1, wherein the driving unit has an elastic body for returning the movable adsorbent to the initial position after releasing an end of the unattached portion of the thin plate. The thin sheet sticking apparatus according to the above.