JPH06110067A - Sealing device for liquid crystal injection hole - Google Patents

Abstract

PURPOSE:To inhibit the movement control technology of a dispenser nozzle from becoming high in level and to reduce the price of the device by positioning a grooved guide roller by engaging it with the upper end of a liquid crystal display panel. CONSTITUTION:A liquid crystal wiping device and a dispenser device are moved onto a group of liquid crystal display panels 11 to be sealed by the X-axial and Y-axial movement control of an arm, and a slider 22 is moved down together with a movable bracket and pressed together with the movable bracket to move a pressure roller 10 down; and then the upper end 11a of a liquid crystal display panel 11 is engaged with the grooved guide roller 24 and nonwoven fabric 7 is pressed against the upper end 11b of another liquid crystal display panel 11 by the pressure roller 10. Therefore, precise positioning is performed by making fine adjustments by the engagement of the grooved guide roller 24 with the upper end 11b of the liquid crystal display panel 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal injection port sealing device.

[0002]

2. Description of the Related Art As is well known, a liquid crystal display panel is manufactured by injecting liquid crystal from its injection port and then applying a resin sealing material to the injection port. −
As disclosed in Japanese Patent Publication No. 201421, etc.,
This is performed by controlling the movement of the dispenser nozzle of the sealing device and positioning the dispenser nozzle at a predetermined position with respect to the injection opening opened at the upper end of the liquid crystal display panel held by an appropriate jig.

[0003]

However, the positioning of the dispenser nozzle with respect to the injection port is carried out by resin-sealing in a state where the dispenser nozzle is protruded from the upper end of the liquid crystal display panel to a side surface (panel display surface) with a thickness of several mm. Since precision is required to prevent the material from being applied, a sophisticated technique is required to control the movement of the dispenser nozzle, which hinders the reduction of the device cost.

The present invention has been made in view of the above circumstances, and when positioning the dispenser nozzle with respect to the liquid crystal inlet, the present invention is provided on the upper end of the liquid crystal display panel where the liquid crystal inlet is opened. It has been found that the above-mentioned problems can be solved by configuring the grooved guide rollers so that they can be engaged and positioned.

[0005]

That is, a liquid crystal injection port sealing device according to the present invention applies a resin sealing material to a liquid crystal injection port opened at the upper end of a liquid crystal display panel into which liquid crystal is injected. When positioning the dispenser nozzle with respect to the liquid crystal inlet, the grooved guide roller is engaged with the upper end of the liquid crystal display panel to be positioned.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below. In FIG. 1 which is a front view and FIG. 2 which is a plan view of this drawing, it is possible to move in biaxial directions of X and Y axes orthogonal to each other. The liquid crystal wiping device 3 and the dispenser device 4 are mounted on the head bracket 2 fixed to the tip of the arm 1 mounted as described above.
Is configured so that the nonwoven fabric 7 can be wound from one reel 5 to the other reel 6. That is,
The non-woven fabric 7 is taken up intermittently as needed, and at that time, the non-woven fabric 7 is rotated by a pair of lower guide rollers 8 (see FIG. 3) and the upper guide roller 8 mounted on the head bracket 2 so as to be rotatable. A certain length is transferred through the guide roller 9.

At this time, as shown in FIG. 3, the push roller 10 is located between the pair of lower guide rollers 8 and pressed downward. This pressing is performed so as to project downward from the lower end of the head bracket 2. Therefore, when the upper end of the liquid crystal display panel 11 in which the liquid crystal is injected is located at the position shown by the chain line,
The nonwoven fabric 7 can be pressed against this upper end, and when the liquid crystal injection port is opened there, the attached liquid crystal can be wiped off.

The push roller 10 is mounted on the movable bracket 12 so as to be rotatable. The vertical movement of the roller 10 is performed by controlling the actuator 13. That is, the movable bracket 12 has the bracket 14
Is fitted to a shaft body 16 connected to a piston rod 13a of an actuator 13 mounted on a head bracket 2 via a shaft coupling 15 via a nut 17 and prevented from coming off by a nut 17, and is urged by a compression spring 18. There is.

Therefore, the piston rod 13a of the actuator 13 is sunk to move the movable bracket 12 upward so that the push roller 10 can be moved to a position above the lower end of the head bracket 2, and from this state. By protruding the piston rod 13a downward, the nonwoven fabric 7 can be pressed against the upper end of the liquid crystal display panel 11 as described above. The reel 5 on the unwinding side is mounted on the head bracket 2 so as to be rotated by the tension action of the nonwoven fabric 7, while the reel 5 on the winding side is fixed to the motor 19 fixed to the head bracket 2. Is fixed to the output shaft of.

On the other hand, the dispenser device 4 is arranged in the horizontal direction (Y-axis direction shown in FIG. 2) on the spline shaft 21 mounted on the movable bracket 20 so as not to rotate.
The dispenser nozzle 23, the grooved guide roller 24, and the sealing sensor 25 are mounted on the slider 22 that is slidably fitted to the movable bracket 20 so that the movable bracket 20 can be moved up and down by the actuator 26. ing.

Therefore, by projecting the piston rod 26a of the actuator 26, the movable bracket 20
Can be moved downward. At that time, the movable bracket 20 is guided and moved by the rail 27 fixed to the head bracket 2. Although FIG. 1 shows the state of being moved downward in this way, in this state, the grooved guide roller 24 is arranged at a constant interval with the liquid crystal display panel 11 shown in FIG. It is engaged with the upper end 11a of the other liquid crystal display panel 11 (see FIG. 4).

That is, in FIG. 4, the liquid crystal wiping device 3 is controlled by controlling the movement of the arm 1 in the X and Y axis directions.
And the dispenser device 4 are moved onto the group of liquid crystal display panels 11 to be sealed, and then the movable bracket 20.
Together with the slider 22, the push roller 10 is moved downward together with the movable bracket 12, whereby the grooved guide roller 24 is engaged with the upper end 11a of the liquid crystal display panel 11 and the push roller 10 is moved.
In the figure, the non-woven fabric 7 is pressed against the upper end 11b of another liquid crystal display panel 11.

Although the actuator 26 is attached to the head bracket 2 via the bracket 28,
The piston rod 26a and the shaft body 29 of this have a shaft coupling 30.
The movable bracket 20 is fitted to the lower end of the shaft 29, is prevented from coming off by the nut 31, and is biased by the compression spring 32. Therefore, the piston rod 26a of the actuator 26 is sunk to move the movable bracket 20 upward so that the grooved guide roller 24 can be moved upward from the lower end of the head bracket 2, and from this state, Two
By projecting 6a downward, the grooved guide roller 24 is moved to the upper end 11a of the liquid crystal display panel 11 as described above.
Can be engaged with.

At the time of such engagement, the grooved guide roller 2
4 has a V-shaped groove, and the slider 22 is mounted so as to be slidable in the Y-axis direction. Therefore, the grooved guide roller 24 is precise with respect to the upper end 11a of the liquid crystal display panel 11. Even if it is not positioned at
It is possible to engage with the upper end 11a of the liquid crystal display panel 11 while forcibly guiding and correcting the position by the character-shaped groove, and thus the liquid crystal injection port 33 opened at the upper end 11a of the liquid crystal display panel 11. Against dispenser nozzle 2
3 can be precisely positioned.

The liquid crystal display panel 11 group into which the liquid crystal is injected is not shown with one end where the liquid crystal injection port 33 is opened facing upward and a spacer 34 interposed between the panels as shown in the drawing. The jig is pressed and held in the direction of the arrow in the figure, but such pressing and holding is necessary in order to discharge the surplus injected liquid crystal from the liquid crystal injection port 33. However, the liquid crystal display panel 11 has 2
Since the glass plate is provided in the bonded structure, the thickness of the liquid crystal display panel 11 is not constant due to the thickness error (manufacturing error) of the glass plate itself. Therefore, the spacers 34 having the same thickness are used. If a large number of liquid crystal display panels 11 are held under pressure, the above-mentioned errors are accumulated and the positions of the respective panels deviate beyond an allowable level.

Therefore, the arm 1 is set so that the jig is set at a predetermined reference position and is movable in the biaxial directions of the X and Y axes in relation to the reference position.
Although it is difficult to precisely position the dispenser nozzle 23 with respect to the liquid crystal injection port 33 that is opened at the upper end of the liquid crystal display panel 11, it is possible to slide in the Y-axis direction. Since the grooved guide roller 24 is mounted on the slider 22 that is mounted so that it can be adjusted, fine adjustment can be performed by engaging the grooved guide roller 24 with the upper end of the liquid crystal display panel 11, and precise positioning can be performed. This makes it possible to prevent the advancement of the movement control technology for the dispenser nozzle 23 and to reduce the cost of the apparatus.

At the same time as the precise positioning of the dispenser nozzle 23 with respect to the liquid crystal inlet 33, the photoelectric tube type sealing sensor 25 can be precisely positioned with respect to the inspection point, so that the resin sealing material is applied in a predetermined manner. It is possible to reliably inspect whether or not the arm 1 is horizontally moved and controlled so that the dispenser nozzle 23 and the sealing sensor 25 reciprocate a predetermined stroke in the X-axis direction. The application and inspection of the stopping material can be performed simultaneously. The wiping of the excess liquid crystal, the application of the resin sealing material, and the inspection are performed on the liquid crystal wiping device 3 for the group of the liquid crystal display panels 11 which are set at the reference position and are stationary.
And the dispenser device 4 is moved from the left side to the right side in FIG.

[0018]

As described above, according to the present invention, it is possible to prevent the sophistication of the movement control technology of the dispenser nozzle that applies the resin sealing material to the liquid crystal injection port, and to reduce the device cost. An inlet sealing device can be obtained.

[Brief description of drawings]

FIG. 1 is a front view of a head portion of a sealing device.

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged view showing a pressing state of a nonwoven fabric.

FIG. 4 is a perspective view showing a sealing mode.

[Explanation of symbols]

 1 Arm 2 Head Bracket 3 Liquid Crystal Wiping Device 4 Dice Spencer Device 7 Nonwoven Fabric 10 Push Roller 11 Liquid Crystal Display Panels 11a, 11b Top 23 Dice Spencer Nozzle 24 Groove Guide Roller 33 Liquid Crystal Inlet Port

Claims (1)

[Claims] 1. A grooved guide roller for positioning a dispenser nozzle, which applies a resin sealing material to a liquid crystal injection port opened at an upper end of a liquid crystal display panel into which liquid crystal is injected, with respect to the liquid crystal injection port. Is configured to be engaged with the upper end of the liquid crystal display panel to be positioned, and a liquid crystal injection port sealing device.