JPH01260417A - Automatic sticking device for polarizing plate - Google Patents

Abstract

PURPOSE:To eliminate the need of a sub-material such as a carrier tape, etc. and to simplify the process by executing automatically the process in which a strip-like polarizing plate with a separator which is cut at a prescribed angle from an original cloth roll is brought to cutting to a single polarized plate and stuck to a liquid crystal display element. CONSTITUTION:With respect to a strip-like polarizing plate 21 which is cut from original cloth, half-cut for making a cut line 28 successively at a prescribed pitch to the polarizing plate 21 body without cutting a separator 18 is executed, a single polarized plate 29 is formed by peeling off the polarizing plate body of the strip-like polarizing plate 21 which is brought to half-cut, from the separator 18, and the single polarizing plate 29 is transferred and stuck onto a liquid crystal display element 37. In such a case, the strip-like polarizing plate 21 which is taken out of a cassette part 22 and transferred holds its strip-like shape as it is even after it is brought to half-cut, therefore, the transfer to a separator peeling means and the processing for peeling off the single polarizing plate 29 from the separator 18 are executed easily, and sticking can be executed without causing a malfunction. In such a way, the material is inexpensive and the process can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an automatic pasting device for pasting a linear polarizing plate onto a liquid crystal display element.

Prior Art> A linear polarizing plate is used in a TN-FEM liquid crystal display element, a GLL liquid crystal display element, etc., and is attached to the liquid crystal display element via an adhesive material. FIG. 5 and FIG. 6 are schematic diagrams of a conventionally used automatic pasting device, and this will be discussed first.

The Pt5S diagram shows single polarizing plates 1 cut to predetermined dimensions arranged on a carrier tape 2. This is an example where the carrier tape 2 itself is a separator and the single polarizing plate 1 does not have a separator. be. The carrier tape 2 is supplied from a supply reel 3 and is taken off onto a take-up bin 4 with a constant tension. It is peeled off from the carrier tape 2 at the top, adsorbed by the air chuck head 6, transferred onto the liquid crystal display element 8, and pasted onto the liquid crystal display element 8 by a pasting roller.

FIG. 6 shows an example using an adhesive type carrier tape 9, in which m-item polarizing plates 11 with separators are piled up in a cassette 10, pressed from above by a weight 10a or a spring, etc., and pushed by a pusher 12 from below to separate individual polarizing plates 11. The front edge part is t/j'X1
By making the formula carrier tape 9 tIIr7I,
A mechanism for transferring a single polarizing plate 11 onto a carrier tape 9 is shown. Note that 13 is a tension roller.

<Problems to be Solved by the Invention> As shown in FIG. 4, the linearly polarizing plate is a raw fabric roll 15 produced in the form of a roll.The polarizing plate body 16, the adhesive layer 17, and the separator 18 are They are all one. The first polarizing plate was cut to the size of the liquid crystal display element 7-3, and it was white! I! It is possible to use both IJ Iso and Kyoto.

However, for example, in a 90° 1' N -FEM liquid crystal display element, the relationship between the viewing angle direction and the absorption axis of the polarizing plate is 4.
It is necessary to cut the linear polarizing plate at an angle of 5°, and a single polarizing plate cannot be cut out from the original roll 15 and used as is.

In addition, when using the carrier tape 2 for the separator shown in FIG. The cost is high, and the process of pasting is also required and time-consuming, which increases the cost. In addition, when using the adhesive carrier tape 9 shown in Pt56, a single polarizing plate 1 as shown in Pt58 is used.
1 may leave the separator 18 attached, but it requires an expensive adhesive carrier tape 9, and when it is transferred onto the tape, two individual polarizing plates 11 may be transferred at the same time, and the adhesive strength of the tape may deteriorate. There is a problem in that troubles such as the transfer not being carried out normally due to a lack of fuel are likely to occur.

The present invention has been made in view of these problems, and aims to provide an automatic polarizing plate pasting device that uses inexpensive materials and can simplify the process.

<、! Means for Solving Problem I> In order to achieve the above-mentioned object, the present invention includes a cassette portion for storing a strip-shaped polarizing plate cut out from an original fabric in a melon, and a cassette portion for storing the strip-shaped polarizing plate from the cassette portion. A transfer means for picking up and transferring one sheet at a time; a half-cutting means for sequentially making cuts in the polarizing plate body at a predetermined pitch without cutting the separator; and polarization of the half-cut strip-shaped polarizing plate. Peel the board body from the separator! The present invention includes a separator peeling means for producing a U-product polarizing plate, and a transfer and pasting means for transporting and pasting the single polarizing plate obtained by the separator peeling means onto a liquid crystal display element.

This VCR! ! The polarizing plates handled by are strip-shaped pieces cut from the original film, and can be obtained by appropriately selecting the cutting angle! The B-product polarizing plate is cut at a predetermined angle corresponding to the absorption axis of the polarizing plate. In addition, the rectangular polarizing plate that is taken out from the cassette section and transported retains its short shape even after being half-cut, so it can be transported to the separator peeling means and processed to peel the single polarizing plate from the separator. It is easy to paste and can be pasted without malfunction.

<Example> Next, an example shown in the drawings will be described. ff Figure 11 is a schematic diagram of the configuration of the embodiment, and Figure 12 is a schematic diagram of the separator peeling means and transferring and pasting means.

21 is a rectangular polarizing plate with a separator cut out from the original fabric roll 15 at an angle of 45° with respect to the absorption axis as shown in Fig. Pt54, and about several hundred polarizing plates are stored in the cassette 22 in a stacked manner. 23 is an air chuck mechanism that adsorbs the polarized light strips [21] from the cassette 22, takes them out one by one, and transfers them onto the transfer table 24; 25 is a feed pitch control roller; Driven by a motor, the strip-shaped polarizing plate 21 transferred onto the transfer table 24 is transferred with a constant pinch using a presser. 2
6 is a half-cut press, and 27 is a half-cut press, which is designed to prevent the separator 18 from cutting off the strip-shaped polarizing plate 21 that has been transferred at a constant pitch, and to cut the polarizing plate itself. 16, cuts are sequentially made at a constant pitch to completely cut. FIG. 3 shows an example of a strip-shaped polarizing plate 21 that has been half-cut halfway, and 28 shows the cut end of the half-cut portion, and 29 shows a single polarizing plate after being cut to a predetermined size.

31 is a separator strip placed at the end of the transfer table 24 @■
The clip head, 32 is a positioning sensor, detects the position of the leading part of the strip-shaped polarizing plate 21, and when the most unnecessary end is clipped with the clip, the chain-type clip head moves to the clip head 31. The polarizing plate 29 is moved as shown in FIG. 12 by the mechanism 33, and the single polarizing plate 29 is peeled off from the separator 18. 34 is an air chuck head that adsorbs the single polarizing plate 29 peeled off from the separator 18 and transfers it to the pasting stator 35; 36 is a pasting roller; here, the single polarizing plate 29 is pasted onto the liquid crystal display element 37; be exposed.

This embodiment is constructed as described above, with the cassette 2
The strip-shaped polarizing plate 21 is taken out from 2 and cut into a predetermined size to make a single polarizing plate 29, which is then used as a liquid crystal display element.
A series of processes up to pasting on the liquid crystal display element 37 are all performed automatically, and the single polarizing plate 29 can be pasted on the glass surface of the liquid crystal display element 37 with good positional accuracy and without entraining air bubbles.

<Effects of the Invention> As is clear from the above-mentioned embodiments, the automatic polarizing plate pasting device of the present invention can convert IJslIIl)-shaped polarizing plates with separators cut out at a predetermined angle from an original roll into a single polarizing plate. The process from cutting to pasting on the liquid crystal display element is performed automatically, and there is no need for auxiliary materials such as carrier tape as in the past, so there is no need for any auxiliary materials such as carrier tape, which can occur during transfer to the carrier tape. This eliminates common troubles, greatly reduces the number of processes that require manual labor, and simplifies the process, making it easier to reduce costs and stabilize quality.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention, and FIG. 2 is a schematic diagram h1 of the separator peeling means and transfer sticking means.
Structure, Fig. 3(a) and c7 Fig. 3(b) is a front view and a plan view of a strip-shaped polarizing plate half-cut halfway, respectively, Fig. 4(a) and Fig. 4(b) are , respectively, are a perspective view and a sectional view showing the raw roll of a linear polarizing plate and a cutout state of a strip-shaped polarizing plate, FIG. 5 and tjS6 are a schematic configuration diagram of a conventional automatic pasting device, respectively. The figure is an explanatory diagram of a state in which single polarizing plates are arranged on a carrier tape. 15... Original fabric roll, 1G... Polarizing plate main body 1
7... Adhesive layer, 18... Separator 21... Strip polarizing plate, 22... Cassette 23... Air chuck mechanism, 25... Feed pitch control roller, 26... Half 27... Pressing allowance for half cut, 28... Cut end of half cut part, 29... Single polarizing plate, 31... Clip head for separator peeling, 34...
... Air chuck head, 36... Pasting roller 37.
・Liquid crystal display element・

Claims (1)

[Claims] 1. A cassette section for stacking and storing strips of polarizing plates cut out from the original film, a transfer means for taking out and transporting the strips of polarizing plates one by one from the cassette section, and cutting a separator from the strips of polarizing plates. half-cutting means for sequentially making cuts in a polarizing plate main body at a predetermined pitch without cutting; a separator peeling means for peeling a polarizing plate main body of a half-cut strip-shaped polarizing plate from a separator to obtain a single polarizing plate; and a separator peeling means 1. An automatic polarizing plate pasting device comprising a transfer and pasting means for transporting and pasting the single polarizing plate obtained in the above onto a liquid crystal display element.