JPH04155313A - Rubbing device and its regulating method - Google Patents

Abstract

PURPOSE:To easily establish the reference position of a rubbing roll and to facilitate its regulation whose personal difference is less by measuring resistance value between a conductive rubbing cloth material wound on a roll body and a table metallic face abutting on the cloth member. CONSTITUTION:A rubbing roll 1 is formed of a roll body having plural electrically isolated metallic rings 13, a nonconductive rubbing cloth member 15 directly wound on a roll body 14, and a conductive rubbing cloth member 16 wound on the metallic ring 13, and a metallic member 51 on which the plural cloth members 16 abut at the same time is exposed to a table face 5. A resistance meter 7 is connected between the metallic member 51 and the metallic part of the rubbing roll 1, and aligning mechanisms 2 to hold both the ends of the roll 1 are alternately lowered to detect a critical point where the cloth member 16 abuts on the metallic member 51, and finely regulated near the critical point so that conductor resistance measured at plural spots between the metallic part of the roll 1 and the metallic member 51 may be almost equal, and a position determined in such way is established as the reference position of the roll 1.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to an alignment treatment process of rubbing an alignment film of a liquid crystal display element, particularly a rubbing device that enables uniform alignment and a method of adjusting the same, which makes it extremely easy to set the reference position of a rubbing roll. The purpose of this product is to provide a rubbing device and its adjustment method that can be used easily and with little individual variation.The purpose of this product is to provide a rubbing device and its adjustment method that can be adjusted easily and with little individual variation. and a conductive rubbing cloth material wrapped around a metal ring to constitute a rubbing roll, and the plurality of conductive rubbing cloth materials are configured to simultaneously contact the metal member exposed on the table surface. Or at least a rubbing roll is composed of a roll main body whose roll surface is made of metal and a conductive rubbing cloth material wrapped around the roll surface, and the rubbing is applied to a plurality of metal members that are electrically insulated and exposed on the table surface. It is configured so that it comes into contact with the roll.

Then, a resistance meter is connected between the metal part of the rubbing roll wrapped with the conductive rubbing cloth material and the metal member exposed on the table surface, and the alignment mechanism that holds both ends of the rubbing roll is lowered alternately. Then, the critical point where both ends of the rubbing roll come into contact with the table is detected, and the alignment mechanism is adjusted to the critical point so that the conductor resistance between the metal part of the rubbing roll and the metal member measured at multiple locations is approximately equal. The configuration is such that fine adjustment is made in the vicinity and that position is used as the reference position of the rubbing roll.

[Industrial application field]

The present invention relates to an alignment process of rubbing an alignment film of a liquid crystal display element, and more particularly to a rubbing device and an adjustment method thereof that enable uniform alignment.

In the production of twisted nematic liquid crystal display elements, an alignment treatment step of rubbing an alignment film formed on a transparent electrode is an extremely important step that affects the display quality of the liquid crystal display element. In other words, in the orientation treatment process, fibers such as nylon or rayon, or rubbing cloth materials arranged vertically, are
For example, the alignment film is oriented in a predetermined direction by pressing it against an alignment film made of polyimide resin or the like with a predetermined pressure and rubbing the surface in a predetermined direction.

However, if the force with which the rubbing cloth is pressed against the alignment film varies, uneven alignment occurs, and the uneven alignment directly becomes uneven brightness, degrading the display quality of the liquid crystal display element. Therefore, the rubbing device that presses and orients the rubbing cloth material against the alignment film must always be able to uniformly press the rubbing cloth material against the alignment film.

[Conventional technology]

Figure 3 is a perspective view showing the configuration of a conventional rubbing device;
The figure is a schematic diagram showing a conventional rubbing device adjustment method.

In Fig. 3, the conventional rubbing device is a rubbing roll l.
It consists of a base 3 that holds both ends of the rubbing roll l via an alignment mechanism 2 that is movable up and down, and a table 5 that is installed on the base 3 and moves the material to be rubbed 4. By rotating 21, the alignment mechanism 2 moves up and down. As shown in FIG. 4, the rubbing roll 1 consists of a cylindrical or cylindrical roll body 11 and a rubbing cloth material 12 in which fibers such as nylon or rayon are vertically implanted, and the rubbing cloth material I2 is a roll of the roll body 11. wrapped around the surface.

In such a rubbing device, the rubbing roll 1 is rotated by the electric motor 6 via the endless belt 61, and the material to be rubbed 4 on the table 5 is moved in a direction perpendicular to the rubbing roll 1, so that the surface 1. The fibers of the rubbing cloth material 12 are rubbed and oriented. However, the length of the fibers planted vertically in the rubbing cloth material 12 varies, and unevenness may occur in the rubbing cloth material 12 when it is wound around the roll body 11. If there are variations in the distance between the table 5 and the tips of the fibers of the rubbing cloth material 12, the force for pressing the rubbing cloth material 12 against the rubbed material 4 will vary, causing uneven orientation.

Therefore, conventionally, the rubbing roll 1 is brought close to the table 5, and the table 5 and the rubbing cloth material 1 are placed close to each other as shown in FIG.
2, or by inserting a gap gauge between the table 5 and the tips of the fibers of the rubbing cloth material 12, and checking the point at which the gap is even between the rubbing roll 1.
As the reference position, the centering mechanism 2 that holds both ends of the rubbing roll l during rubbing is pulled up from the reference position by a distance corresponding to the thickness of the material to be rubbed 4.

[Invention or problem to be solved]

However, by detecting the gap between the table and the tips of the fibers of the rubbing cloth material with the naked eye, or by inserting a gap gauge between the table and the tips of the fibers of the rubbing cloth material, it is possible to check whether the gap is uniform or not. Conventional rubbing devices that use the reference position of the rubbing roll depend on the sense and skill level of the operator, which has large individual differences and requires a lot of time to adjust. Moreover, there was a problem in that it was extremely difficult to make the gap uniform over the entire circumference of the rubbing roll.

SUMMARY OF THE INVENTION An object of the present invention is to provide a rubbing device and a method for adjusting the same, which can extremely easily set the reference position of a rubbing roll and which has little individual variation.

[Means to solve the problem]

FIG. 1 is a principle diagram showing a rubbing device according to the present invention. The same objects are represented by the same symbols throughout the figures.

The above problem arises in a rubbing device that has a base that holds both ends of the rubbing roll via an alignment mechanism that is movable up and down, and a table that is movable on the base in a direction orthogonal to the rubbing roll. a roll body 14 comprising a plurality of metal rings 13 that are electrically insulated; a non-conductive rubbing cloth material 15 that is directly wrapped around the roll body 14;
The rubbing device of the present invention is made up of a metal member 51 which is made up of a conductive rubbing cloth material 16 wrapped around a metal ring 13 and which is simultaneously abutted by a plurality of conductive rubbing cloth materials 16, and is exposed on a table 5 surface.

Alternatively, the rubbing roll 1 is composed of a roll main body 18 whose roll surface 17 is made of metal, and a conductive rubbing cloth material I6 wrapped around the roll surface 17, and a plurality of metal members 51 in contact with the rubbing roll 1. The rubbing device of the present invention is electrically insulated and exposed on five surfaces of the table.

A resistance meter 7 is connected between the metal member 51 exposed on the surface of the table 5 and the metal part of the rubbing roll 1 around which the conductive rubbing cloth material 16 is wound, and a The core mechanism 2 is lowered alternately to detect the critical point where the conductive rubbing cloth material 16 contacts the metal member 51, and the conductor between the metal part of the rubbing roll and the metal member 51 is measured at multiple locations. This is achieved by the adjustment method of the present invention in which the alignment mechanism 2 is finely adjusted near the critical point so that the resistances are approximately equal, and that position is used as the reference position of the rubbing roll 1.

[For production]

As shown in Figure 1(a), there is a roll body comprising a plurality of electrically insulated metal rings, a non-conductive rubbing cloth material wrapped directly around the roll body, and a conductive cloth material wrapped around the metal rings. A rubbing device of the present invention, in which a rubbing roll is constituted by a plurality of conductive rubbing cloth materials, and a metal member, which is simultaneously contacted by a plurality of conductive rubbing cloth materials, is exposed on the top surface of a table, or as shown in FIG. 1(b). A rubbing roll is constituted by a roll main body using metal at least on the roll surface and a conductive rubbing cloth material wrapped around the roll surface, electrically insulating a plurality of metal members in contact with the rubbing roll,
The rubbing device of the present invention, which is exposed on the top surface of the table, includes connecting a resistance meter between the metal part of the rubbing roll wrapped with the conductive rubbing cloth material and the metal member exposed on the table surface. Accordingly, it is possible to easily detect the critical point where the conductive rubbing cloth material comes into contact with the metal member when the alignment mechanism that holds both ends of the rubbing roll is lowered alternately.

Further, the fibers constituting the conductive rubbing cloth material have an appropriate resistance value, and the conductor resistance between the metal part of the rubbing roll and the metal member varies depending on the number of fibers in contact with each other. Therefore, by finely adjusting the centering mechanism near the critical point so that the conductor resistance between the metal part of the rubbing roll and the metal member measured at multiple locations is approximately equal, the force with which the fibers of the rubbing roll are pressed against the table can be adjusted. It is possible to make it almost uniform.

This adjustment method has small individual differences and can significantly shorten the time required for adjustment. Moreover, by finely adjusting the alignment mechanism without rotating the rubbing roll,
The fibers of the rubbing roll are pressed against the table evenly over the entire circumference. That is, it is possible to realize a rubbing device and its adjustment method in which the reference position of the rubbing roll can be set extremely easily and there is little individual variation.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 2 is a plan view showing one embodiment of the rubbing device according to the present invention.

As shown in FIG. 1(a), an electrically insulated metal ring 13
a roll body 14 with
A non-conductive rubbing cloth material 15 wrapped around the metal ring 1
It is also possible to achieve the object of the present invention even if the rubbing roll 1 is configured with the conductive rubbing cloth material 16 wound around the conductive rubbing cloth material 16 wound around the conductive rubbing cloth material 16. However, in order to reduce the uneven orientation, it is preferable to use a single piece of rubbing cloth material.

Therefore, in one embodiment of the present invention, as shown in FIG. 2, a rubbing roll 1 is constructed by wrapping two conductive rubbing cloth materials 16 around a roll body 18 made entirely of metal. Note that a metal ball 22 that is in contact with one end of the rubbing roll 1,
The spring 23 and the terminal fitting 24 are terminals on the rubbing roll 1 side to which the resistance meter 7 is connected for adjustment.

Furthermore, as shown in FIG. 1(b), it is possible to achieve the object of the present invention by electrically insulating the two metal members 51 that contact both ends of the rubbing roll 1 and exposing them to the top surface of the table 5. It is. However, unevenness may occur in the rubbing cloth material in the middle of the rubbing roll 1.
In order to make the force with which the fibers of the rubbing roll are pressed against the table more uniform, it is desirable that the metal member 5I that abuts the intermediate portion be exposed on the upper surface of the table 5.

Accordingly, in one embodiment of the present invention, as shown in FIG. Table 5 moving in the direction
It is exposed on the top surface.

Note that the resistance meter 7 is connected to each metal member 51 via a changeover switch 71.

Such a rubbing device can easily detect the critical point where both ends of the rubbing roll come into contact with the table when the alignment mechanism that holds both ends of the rubbing roll is lowered.
By finely adjusting the centering mechanism near the critical point so that the conductor resistance between each point of the rubbing roll and the table is approximately equal, the force with which the fibers of the rubbing roll are pressed against the table can be made almost uniform. can.

Furthermore, individual differences are small, making it possible to significantly shorten the time required for adjustment. Moreover, by finely adjusting the alignment mechanism without rotating the rubbing roll, the force with which the fibers of the rubbing roll are pressed against the table can be made uniform over the entire circumference. That is, it is possible to realize a rubbing device and its adjustment method in which the reference position of the rubbing roll can be set extremely easily and there is little individual variation.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to extremely easily set the reference position of the rubbing roll, and to provide a rubbing device and its adjustment method that have little individual variation.

[Brief explanation of drawings]

FIG. 1 is a principle diagram showing a rubbing device according to the present invention, FIG. 2 is a plan view showing an embodiment of a rubbing device according to the present invention, FIG. 3 is a perspective view showing the configuration of a conventional rubbing device, FIG. 4 is a schematic diagram showing a conventional rubbing device adjustment method. In the figure, 1 is a rubbing roll, 2 is an alignment mechanism, 3 is a base,
5 is a table, 6 is an electric motor,
7 is a resistance meter, 13 is a metal ring, 14 is a roll body, 15 is a non-conductive rubbing cloth material, 16 is a conductive rubbing cloth material, 17 is a roll surface, 18 is a roll body, 22 is a metal ball, 23 is a spring , 24 is a terminal fitting, 51 is a metal member, 61 is an endless belt,
71 represents a changeover switch. To this end, we will show the principle of R-Rabin's weak force Σ.
2 Newly published sword No. 3 showing the structure of the Rabin 7 device in the diagram.
Figure 4 Figure 4 of the Hou style diagram showing the 56 ways to practice the traditional method of killing Rabinfu.

Claims (1)

[Claims] 1) A rubbing device having a base that holds both ends of a rubbing roll via an alignment mechanism that is movable up and down, and a table that is movable on the base in a direction orthogonal to the rubbing roll. The rubbing roll (1) includes a roll body (14) comprising a plurality of electrically insulated metal rings (13);
Consisting of a non-conductive rubbing cloth material (15) directly wrapped around the roll body (14) and a conductive rubbing cloth material (16) wrapped around the metal ring (13), A rubbing device characterized in that a metal member (51) with which a conductive rubbing cloth material (16) abuts at the same time is exposed on the surface of a table (5). 2) In the rubbing device according to claim 1, the rubbing roll (1) includes a roll body (18) in which at least the roll surface (17) is made of metal, and a conductive rubbing cloth wrapped around the roll surface (17). and a plurality of metal members (51) that contact the rubbing roll (1).
A rubbing device characterized in that the rubbing device is electrically insulated and exposed on the surface of a table (5). 3) In the rubbing apparatus according to claims 1 and 2, the metal member (51) exposed on the surface of the table (5) and the metal part of the rubbing roll (1) around which the conductive rubbing cloth material (16) is wound. A resistance meter (7) is connected between the metal members (51) and the conductive rubbing cloth material (
16) is detected, and the metal part of the rubbing roll (1) and the metal member (5) measured at multiple locations are detected.
Adjustment characterized by finely adjusting the alignment mechanism (2) in the vicinity of the critical point so that the conductor resistance between the two points is approximately equal, and making that position the reference position of the rubbing roll (1). Method.