JPS5921004B2 - Polarizing plate pasting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polarizing plate pasting device for a liquid crystal display device.

A liquid crystal display device is constructed by pasting polarizing plates on both the front and back surfaces of an electrode cell filled with liquid crystal so that the polarization axes are perpendicular to each other.

Conventionally, polarizing plates to be attached to electrode cells are made by placing a long polarizing plate in a predetermined size and labeling it in advance, and then attaching it to a carrier tape using an adhesive. When assembling, use tweezers etc. to peel off each piece one by one, or
The method used was mechanical peeling.

However, this method requires processing steps such as labeling the polarizing plate and attaching it to the carrier tape, which increases the manufacturing cost of the polarizing plate itself. This method has the drawback that the manufacturing and post-processing steps for the polarizing plate are complicated, such as the need to attach a protective tape to the opposite side of the tape. In order to eliminate such drawbacks,
The present inventors previously proposed in Japanese Patent Application No. 55-92217 a method of automatically labeling a polarizing plate and pasting it on both the front and back sides of an electrode cell (hereinafter referred to as the "prior invention").
.

That is, in the previous invention, a label polarizing plate is pasted on one side of the cell by a first star wheel that sucks and holds the electrode cell supplied by the first conveyor and a first pasting drum that sucks and holds the label polarizing plate. After that, the second star foil attracts and holds this, and the electrode cell is turned over, and the second
A method was used in which another label polarizing plate, which was held under suction by the pasting drum, was pasted on the other side of the cell, the label polarizing plate was pasted on both sides, and the product was further collected by a second conveyor. As described above, in the previous invention, in addition to requiring two pasting drums that suck and hold the label polarizing plate, it also requires a first conveyor for supplying the electrode cells and a second conveyor for collecting and transporting the products. It had drawbacks such as being complicated and large.

The present invention has been made in order to solve the above-mentioned drawbacks of the previous invention, and it improves the mechanism for reversing the front and back sides of electrode cells, and also allows the pasting of polarizing plates on both the front and back sides of electrode cells on a single conveyor. The purpose of the present invention is to provide a pasting device that can be applied continuously to simplify and downsize the pasting device, and can also pasted a label polarizing plate supplied as a laminated tape to both sides of an electrode cell with optical precision. This is what I did.

The present invention will be explained below with reference to the drawings. Figure 1 A shows a label polarizing plate according to the present invention, where 1 is a long laminated tape, 2 is a label polarizing plate (hereinafter simply referred to as a label), 3 is an adhesive, and 4 is a carrier tape. 2 is manufactured by laminating a tape-shaped polarizing plate on a carrier tape 4 via an adhesive 3 and cutting only the polarizing plate to a certain length, that is, by cutting the laminated tape... be done.

The adhesive 3 remains on the label 2 when the carrier tape 4 is peeled off, thereby attaching the label 2 to the electrode cell. The above is the same as the previous invention, but label 2
Marking M along the half-cut line L that separates the
is applied.

This marking M is made by installing a known hot printer or the like in the half-cut device that forms the label polarizing plate 2 of the laminated tape 1, and printing it in a desired color such as black, red, yellow, white, etc., which is not sensitive to the optical sensor. It can be easily applied by drawing a line with a width of about 0.5 mm.

FIG. 2 shows a labeling device.

In the figure, reference numeral 9 denotes a conveyor for transporting cells, and a chain-shaped pallet 11 rotated by a sprocket 10 has a recessed positioning seat 11a for positioning the electrode cell 12 on the surface thereof.
13 is a reel for supplying the laminated tape 1 with marking M on the label 2; 14 is a guide roll; 15 is a sorting plate that separates the label 2 from the carrier tape 4; The electrode cell 1 of the chain pallet 11 consists of a wedge-shaped plate with an angle of about 20 degrees.
It is installed close to the top of 2.

Further, a sensor 16 and a pressure roll 17 are arranged near the tip of the sorting plate 15 to determine whether the labels 2 are good or bad. This pressure roll 17 is connected to the pallet 11 of the conveyor 9.
The labels 2 are arranged so as to be in contact with each other, and the labels 2 peeled off and separated by the sorting plate 15 are pressed onto one surface of the cell 12. 1
8 and 19 are take-up rolls of the carrier table 4, 20 are its guide rolls, and the take-up rolls 18 and 19 are activated by input signals from the sensor 16, such as a limit switch, etc.
The label 2 is configured to be moved one frame at a time.

The above reel 13, guide roll 14, . . . take-up rolls 18, 19, etc. constitute a first label supply device for the cell 12.

Reference numeral 21 denotes a first cell suction drum provided behind the pressure roll 17 and facing the conveyor 9; 22 a second cell suction drum provided opposite the drum 21 and the conveyor 9; This is to invert the front and back of the cell 12.

That is, a plurality of cell suction seats 21a, 22a are provided at predetermined intervals on the outer periphery of the drums 21, 22, respectively, and suction holes 21b, 22b communicating with a vacuum device (not shown) are opened on the surface of each suction seat 21a, 22a. k Also drum shaft 21
c and 22c are connected by gears, so that the drum 21 rotates in the conveying direction of the conveyor (arrow A), and the drum 22 rotates in the opposite direction (arrow B).

The suction seat 21a and the suction seat 22a are connected to the drum 21,
22 so as to face each other with a gap corresponding to the thickness of the cell 12 left in the direction of the tangent line N of the cell 12 . Reference numeral 23 denotes a spring plate whose tip is in contact with the surface of the conveyor 9, and is used to adjust the cell 12 to be at a constant position on the positioning seat 11a on the pallet 11.

Behind this spring plate 23 is a reel 13, similar to the first lapel supply device. , guide roll 14″, sorting plate 1
5', a sensor 16', a pressure roll 17'', a bow roll 18', 19' and a guide roll 20''.

Next, the operation of the labeling device will be explained. reel 1
3, the laminated tape 1 is wound on a take-up roll 18,1
It is pulled by the rotation of 9 and advances in the direction of the sorting plate 15 and sensor 16. Label 2 of laminated tape 1 is sensor 1
6 to check for scratches and bubbles, and each time the marking M is confirmed, an input signal is sent to the take-up rolls 18 and 19. If the product is defective, an alarm is issued by a combination of known alarm circuits, etc. Manually remove defective products. At the tip of the sorting plate 15, the carrier tape 4 is folded back and pulled in the opposite direction to the previous direction of movement. As a result, the carrier tape 4 was peeled off with the adhesive 3 remaining on the label 2, and the label 2 was advanced parallel to the side surface of the sorting plate 15 and placed on the press roll 17 and the pallet 11 of the conveyor 9. The label 2 enters between the cell 12 and the label 2 is applied to one side of the cell 12 by a pressure roll 17. Next, the cell 121 with the label 2 affixed thereto is transferred toward the drum 21, and at the position
The label surface is suctioned and held by a, and moves to position Y as the drum 21 rotates, and the cell suction seat 22 of the drum 22
It is sucked and held by a.

That is, by releasing the reduced pressure state of the cell suction seat 21a of the drum 21 and then vacuuming the cell suction seat 22a of the drum 22, the label surface of the cell 12' is attracted and transferred to the drum 22. When the drum 22 rotates further and reaches position Z, the reduced pressure state is released and the cell 12' is released and placed on the positioning seat 11a of the bullet 11 with the side to which the label 2 is not attached facing upward. That is, cell 12'
are turned over by the drums 21 and 22 and conveyed in the moving direction of the conveyor 9. This cell 12' is pushed to the rear of the positioning seat 11a of the pallet 11 by the spring plate 23, and after adjusting its placement position, it is transferred to the second label supplying device, and is pressed by the pressure roll 17' etc. in the same manner as above. A cell product 12I having labels 2 attached to both sides is obtained.

The above example has been described in which the reel 13 is wound with the laminated tape 1 labeled with a polarizing plate in advance and marked with M, but the reel 13 is wound with a conventional long laminated tape that is not labeled. Similarly to the previous invention, a marking device such as a half-cut device and a hot printer may be provided between the reel 13 and the sorting plate 15.

As described above, the present invention includes a first cell adsorption drum which is placed on a conveyor consisting of a chain of pallets on which electrode cells are placed, and which faces the conveyor and rotates in the conveying direction of the conveyor. A second cell suction drum that rotates in the opposite direction is provided, and cell suction seats are provided at a predetermined interval on both drums, and the opposite side of the electrode cell suctioned and held by the first cell suction drum is placed on the second suction drum. A cell reversing section configured to perform suction transfer, a sorting plate that separates the carrier tape of a label polarizing plate that is continuously supplied from a reel before and after the cell reversing section, a sensor disposed at the tip of the sorting plate, and Since a polarizing plate crimping unit consisting of a pressure roll is provided, one conveyor is sufficient for transporting the electrode cells and pasting the labeled polarizing plates on both the front and back sides of the electrode cells, and it is also possible to transfer the electrode cells and attach the labeled polarizing plates to both the front and back sides of the electrode cells. Since a drum for suction and holding is not required, the entire device can be simplified and miniaturized, thereby making it possible to provide an inexpensive device.

Further, according to the apparatus of the present invention, the label polarizing plate is supplied from a reel as a half-cut laminated tape 1, and a wedge-shaped plate is placed close to above the electrode cells on a conveyor consisting of a continuous pallet 11. Sorting board 15 consisting of bodies
Since only the carrier tape 4 of the laminated tape 1 is folded back at the tip of the laminated tape 1 and pulled by the take-up rolls 18 and 19, the label polarizing plate 2 is continuously separated from the carrier tape 4, so that the label polarizing plate itself The carrier tape 4 can be peeled off without deformation or any other load, and the exposed adhesive surface of the label polarizing plate is pressed by a pressure roll 17 disposed close to the tip of the sorting plate. An advantage is obtained that the electrode cell can be attached with optical precision without producing bubbles, astigmatism, dimensional deviations, etc. on the surface of the electrode cell.

[Brief explanation of the drawing]

FIG. 1 shows a label polarizing plate according to the present invention, A is a plan view thereof, and FIG. 2 is an explanatory view of a pasting device showing one embodiment of the present invention. 1... Laminated tape, 2... Polarizing plate, 3
...Adhesive, 4...Carrier tape,
9...Conveyor for transporting cells, 16...
・Sensor 17... Press roll, 21...
. . . 1st cell suction drum, 22 . . . 2nd cell suction drum.

Claims (1)

[Claims] 1. In a device for pasting label polarizing plates on both the front and back surfaces of electrode cells constituting a liquid crystal display device, a label polarizing plate is placed on a conveyor consisting of a chain of pallets on which electrode cells are placed, facing the conveyor and facing in the transport direction of the conveyor. A first cell suction drum that rotates in a direction opposite to the transport direction of the conveyor and a second cell suction drum that rotates in a direction opposite to the transport direction of the conveyor are provided, and cell suction seats are provided at predetermined intervals on the outer periphery of the first and second cell suction drums. a cell reversing section for reversing the front and back sides of the electrode cells by suctioning and transferring the opposite side of the electrode cell suctioned and held by the first cell suction drum to the second cell suction drum, and a reel before and after the cell reversing section. From a sorting plate with a wedge-shaped tip that separates the carrier tape of the label polarizing plate, which is continuously supplied as a laminated tape with a half-cut, and a sensor and a pressure roll arranged near the tip of the sorting plate. What is claimed is: 1. A polarizing plate pasting device, characterized in that a polarizing plate crimping part is arranged.