JP2014066860A - Rubbing cloth winding device and winding method of rubbing cloth using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rubbing cloth winding device capable of increasing adhesion between a rubbing cloth and a rubbing roller.SOLUTION: A rubbing cloth winding device 1 includes: a stage 3 on which a rubbing cloth 2 is placed; a support roller 4 for supporting the lower face of the rubbing cloth 2; a rubbing roller mounting part 6 which is disposed being opposed to the upper side of the support roller 4, mounted with a rubbing roller 5 having an adhesive layer, and which has an elevating section 6a to vertically move the rubbing roller 5 to nip the front end of a part of the rubbing cloth 2 between the support roller 4 and the rubbing roller 5 to adhere the rubbing cloth 2 to the rubbing roller 5, and a rotary section 6b that rotate the rubbing roller 5 to wind the rubbing cloth 2 on the rubbing roller 5; and a heating roller 7 that presses the wound rubbing cloth 2 with a predetermined pressure while heating the same.

Description

  The present invention rubs a rubbing cloth used in a rubbing process for aligning a substrate on which an alignment film is formed in a manufacturing process of a liquid crystal display device used for various applications such as a mobile phone, a digital camera, or a portable information terminal. The present invention relates to a rubbing cloth winding apparatus for winding on a roller and a rubbing cloth winding method using the rubbing cloth winding apparatus.

  The liquid crystal display device is rubbed in order to align liquid crystal molecules uniformly and in a predetermined direction. This rubbing process is performed by rubbing the alignment film formed on the substrate with a rubbing cloth wound around the outer periphery of the rubbing roller. A rubbing cloth winding apparatus for winding a rubbing cloth used in the rubbing process around the rubbing roller is disclosed in, for example, Patent Document 1.

JP-A-11-84383

  However, in the rubbing cloth winding device disclosed in Patent Document 1, when the rubbing cloth is wound around the rubbing roller, the adhesion between the rubbing cloth and the rubbing roller tends to be low, and the rubbing process is performed using such a rubbing roller. When it did, there existed a problem that a rubbing cloth float and peeling of a rubbing cloth were easy to generate | occur | produce during a rubbing process.

  The present invention has been made in view of the above-described problems, and the purpose thereof is to press the rubbing cloth with a heating roller with a predetermined pressure while heating the rubbing cloth, thereby improving the adhesion between the rubbing cloth and the rubbing roller. A rubbing cloth winding apparatus that can be improved and a rubbing cloth winding method using the same.

  The rubbing cloth winding device according to the present invention includes a stage on which the rubbing cloth projects partially on the upper surface, and the protruding rubbing disposed on the end of the stage on the side where the rubbing cloth projects. The rubbing cloth projecting between the supporting roller and the rubbing roller, to which a rubbing roller having an adhesive layer on the outer periphery, which is disposed so as to face the upper surface of the supporting roller, is mounted. A rotation part that raises and lowers the rubbing roller to attach the rubbing cloth to the rubbing roller by sandwiching a part of the tip of the rubbing cloth and rotates the rubbing roller to wind the rubbing cloth around the rubbing roller A rubbing roller mounting portion having a portion, and disposed in the vicinity of the rubbing roller mounting portion, While heating said rubbing cloth wound around the Bing roller is characterized in that it comprises a heating roller for pressing with a predetermined pressure.

  The rubbing cloth winding method of the present invention includes a step of attaching the rubbing roller having an adhesive layer on the outer periphery to the rubbing roller attaching portion using the rubbing cloth winding device of the present invention, and a part of the upper surface of the stage. Projecting the rubbing cloth and lowering the rubbing roller toward the support roller so that a part of the rubbing cloth protruding from the stage has a tip between the support roller and the rubbing roller. The step of sandwiching and rubbing the rubbing cloth to the rubbing roller, the step of rotating the rubbing roller to wind the rubbing cloth around the rubbing roller, and the winding of the rubbing roller while rotating the rubbing roller The rubbing cloth is heated while being heated by the heating roller. It is characterized in that comprises the step of pressing with a force.

  According to the rubbing cloth winding device of the present invention, there is an effect that the adhesion between the rubbing cloth and the rubbing roller can be improved by pressing the rubbing cloth with a heating roller at a predetermined pressure while heating.

It is the schematic side view which looked at the rubbing cloth winding apparatus which concerns on 1st Embodiment from the side. It is a top view of the heating roller of the rubbing cloth winding apparatus shown in FIG. It is explanatory drawing explaining the state by which the rubbing cloth was pinched | interposed between the support roller and the rubbing roller by the rubbing cloth winding apparatus shown in FIG. It is explanatory drawing explaining the state in the middle of the rubbing cloth wound by the bubbling roller with the rubbing cloth winding apparatus shown in FIG. It is explanatory drawing explaining the state by which the rubbing cloth was wound around the rubbing roller with the rubbing cloth winding apparatus shown in FIG. It is explanatory drawing explaining the state by which the rubbing cloth was pressed with the heating roller with the rubbing cloth winding apparatus shown in FIG. (A) is the schematic side view which looked at the rubbing cloth winding apparatus which concerns on 2nd Embodiment from the side, (b) is the state which brushes a rubbing cloth with a brushing roller with the rubbing cloth winding apparatus shown to Fig.7 (a). It is explanatory drawing explaining these. 7A is a sectional view of the brushing roller of the rubbing cloth winding apparatus shown in FIG. 7A, FIG. 7B is a sectional view of the rubbing roller wound around the rubbing roller, and FIG. 7C is a rubbing after brushing with the brushing roller. It is sectional drawing of a roller.

<Embodiment>
Hereinafter, a rubbing cloth winding device and a rubbing cloth winding method using the same according to a first embodiment (referred to as Embodiment 1) of the present invention will be described with reference to FIGS. 1 and 6. FIG. 1 is a schematic side view of the rubbing cloth winding device according to the first embodiment of the present invention as seen from the side.

  The rubbing cloth winding device 1 is configured as shown in FIGS. 1 and 2, and a stage 3 on which the rubbing cloth 2 is partially extended on the upper surface, and a side of the stage 3 on which the rubbing cloth 2 is extended. A support roller 4 that supports the lower surface of the protruding rubbing cloth 2 disposed at the end of the end portion, and a rubbing roller 5 that is disposed so as to face the upper side of the support roller 4 and that has an adhesive layer on the outer periphery are attached. In addition, the rubbing cloth 2 has an elevating part 6a for raising and lowering the rubbing roller 5 so that the rubbing cloth 2 is bonded to the rubbing roller 5 by sandwiching the tip part of the rubbing cloth 2 protruding between the support roller 4 and the rubbing roller 5. A rubbing roller mounting portion 6 having a rotating portion 6b for rotating the rubbing roller 5 to wrap the rubbing roller 5 around the rubbing roller 5, and a rubbing roller mounting 6 arranged in the vicinity of, and a heating roller 7 for pressing with a predetermined pressure while heating the rubbing cloth 2 wound around the rubbing roller 5.

The rubbing winding device 1 winds a rubbing cloth 2 around a rubbing roller 5 that performs a rubbing process on a substrate on which an alignment film is formed.

  In the rubbing cloth 2, fine fibers called piles 2b are planted on a base cloth 2a serving as a base. The base fabric 2a of the rubbing cloth 2 is composed of warp and weft, and the warp and weft are woven. Therefore, the side bonded to the rubbing roller 5 of the base fabric 2a has an uneven shape due to weaving of warp and weft.

  The size of the rubbing cloth 2 is appropriately selected according to the size of the rubbing roller 5. The base fabric 2a is made of a material such as cotton or rayon, and the pile 2b is made of a material such as cotton or rayon.

  The stage 3 has a quadrangular shape, and the rubbing cloth 2 is partially extended. A positioning pin 3a for positioning the rubbing cloth 2 is provided on the upper surface of the stage 3 in order to place the rubbing cloth 2 at a predetermined position. The positioning pins 3a are provided on the upper surface of the stage 3 so that the rubbing cloth 2 is arranged at a predetermined position according to the size of the rubbing cloth 2.

  As shown in FIG. 1, the rubbing cloth 2 is disposed on the upper surface of the stage 3 in a state where a part of the rubbing cloth 2 protrudes from the outer periphery of the stage 3. That is, part of the rubbing cloth 2 projects from the stage 3, and the remaining non-projected part is disposed on the upper surface of the stage 3.

  The support roller 4 is disposed at the end of the end of the stage 3 on the side where the rubbing cloth 2 is projected. The support roller 4 supports the lower surface of the rubbing cloth 2 that protrudes from the stage 3. The support roller 4 rotates according to the rotation of the rubbing roller 5.

  The rubbing roller 5 has a cylindrical shape and is made of a material such as aluminum or iron. Further, the rubbing roller 5 has an adhesive layer on the outer periphery for winding the rubbing cloth 2. For example, a tape-shaped adhesive layer made of a material such as an acrylic resin adhesive is provided over the outer periphery of the rubbing roller 5. That is, a tape-like adhesive material having adhesiveness is wound around the outer periphery of the rubbing roller 5 in advance.

  As shown in FIG. 1, the rubbing roller attachment portion 6 is disposed so as to face the upper side of the support roller 4, and the rubbing roller 5 around which the rubbing cloth 2 is not wound is attached. The rubbing roller mounting portion 6 includes an elevating portion 6 a that moves the rubbing roller 5 up and down and a rotating portion 6 b that rotates the rubbing roller 5.

  The elevating part 6 a raises and lowers the rubbing roller 5 so that the rubbing cloth 2 is bonded to the rubbing roller 5 by sandwiching the tip part of the rubbing cloth 2 protruding between the support roller 4 and the rubbing roller 5.

  The rotating unit 6 b rotates the rubbing roller 5 in order to wind the rubbing cloth 2 around the rubbing roller 5. By rotating the rubbing roller 5, the rubbing cloth 2 can be wound around the rubbing roller 5 having the adhesive layer. The outer periphery of the rubbing cloth 2 wound around the rubbing roller 5 is pressed by the support roller 4 as the rubbing roller 5 rotates.

  The heating roller 7 is disposed in the vicinity of the rubbing roller mounting portion 6 as shown in FIG. The heating roller 7 presses the rubbing cloth 2 wound around the rubbing roller 5 with a predetermined pressure while heating. That is, the heating roller 7 presses the rubbing cloth 2 with a predetermined pressure while rotating the rubbing roller 5 after the rubbing cloth 2 is wound around the rubbing roller 5. Thus, the heating roller 7 presses the rubbing cloth 2 wound around the rubbing roller 5 with a predetermined pressure in a pressurized state. The heating roller 7 rotates according to the rotation of the rubbing roller 5.

  Further, the heating roller 7 is disposed in the vicinity of the rubbing roller mounting portion 6 and at any position along the outer peripheral portion of the rubbing roller 5 as long as the rubbing cloth 2 wound around the rubbing roller 5 can be pressed. Also good.

  As shown in FIG. 2, the heating roller 7 includes a roller pressing portion 7a, a roller base 7b, a roller hollow shaft 7c, and a heater portion 7d.

  The roller pressing portion 7a of the heating roller 7 needs to be elastic, and is made of, for example, silicone rubber or natural rubber. The roller base material 7b is made of a metal material such as stainless steel or aluminum alloy, for example, in order to transmit heat to the roller pressing portion 7a.

  Moreover, the heating roller 7 has a heating means for applying heat to the rubbing cloth 2. As the heating means, for example, there is a low-frequency induction heating type. As shown in FIG. 2, the low-frequency induction heating type heating roller 7 is provided with a low-frequency induction heating coil serving as a heater portion 7d inside the roller hollow shaft 7c. The roller hollow shaft 7 c is a portion that serves as a rotating shaft of the heating roller 7.

  Since the heating roller 7 has a heater portion 7d made of a low frequency induction heating coil inside, the heating roller 7 becomes a heating element by the magnetic flux generated from the low frequency induction heating coil. The roller hollow shaft 7c is made of, for example, a metal material such as stainless steel or aluminum alloy. Further, the heating roller 7 is provided with a power supply lead wire 7e for supplying a low frequency to the low frequency induction heating coil.

  Thus, since the heating roller 7 is a structure which has a heating means, it can press with a predetermined pressure, heating the rubbing cloth 2. FIG. Further, the heating roller 7 can apply sufficient heat to the rubbing cloth 2 by rotating the rubbing roller 5 a plurality of times in a state where the rubbing cloth 2 is pressed at a predetermined pressure, that is, in a pressurized state. . Thereby, the rubbing cloth 2 is wound around the outer periphery of the rubbing roller 5 with high adhesion, so that the adhesiveness between the rubbing cloth 2 and the rubbing roller 5 is improved.

  The heating temperature when the rubbing cloth 2 is heated by the heating roller 7 is, for example, 50 (° C.) to 100 (° C.) in order to soften the adhesive layer of the rubbing roller 5. The temperature of the warm roller 7 is set.

  In addition, the predetermined pressure when the heating roller 7 presses the rubbing cloth 2 is such that if the pressure is low, the adhesion between the rubbing cloth 2 and the rubbing roller 5 tends to be lowered. Since the pile 2b tends to fall down, for example, it is set to 0.5 (MPa) to 1 (MPa).

  Further, the heating roller 7 is provided so as to be larger than the width of the rubbing cloth 2 around which the length of the holding portion 7a in which the temperature is kept uniform is wound in order to uniformly heat the rubbing cloth 2. It is preferable.

  Further, the heating means of the heating roller 7 is not limited to the low frequency induction heating method, but may be an electric resistance heating method, as long as the heating roller 7 can heat the rubbing cloth 2. Good.

  When the rubbing cloth winding device 1 is not provided with the heating roller 7, the base cloth 2a of the rubbing cloth 2 is woven with warps and wefts, so that the side bonded to the rubbing roller 5 has an uneven shape. Thus, the adhesive layer provided on the rubbing roller 5 enters the concave and convex portions and is difficult to adhere, and the adhesion between the rubbing cloth 2 and the rubbing roller 5 tends to be lowered.

  However, in the rubbing cloth winding device 1, the heating roller 7 is disposed and the rubbing cloth 2 is pressed with a predetermined pressure while heating, so that the adhesive layer on the outer periphery of the rubbing roller 5 is softened by heat at a constant temperature. Thus, since the rubbing cloth 2 and the rubbing roller 5 are bonded to the concave and convex portions of the base cloth 2a, the adhesion between the rubbing cloth 2 and the rubbing roller 5 is improved.

  Accordingly, when the rubbing process is performed on the substrate on which the alignment film is formed by using the rubbing roller 5 around which the rubbing cloth 2 is wound by the rubbing cloth winding device 1, the rubbing cloth 2 and the rubbing roller 5 Since the adhesiveness is high, the occurrence of floating of the rubbing cloth 2 of the rubbing roller 5 or peeling of the rubbing cloth 2 during the rubbing process is suppressed.

  Next, a method for winding the rubbing cloth 2 according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 3 to 6.

  First, the rubbing roller 5 having an adhesive layer on the outer periphery is attached to the rubbing roller attaching portion 6. The rubbing roller 5 is previously provided with an adhesive layer on the outer periphery with a tape or the like.

  Then, the rubbing cloth 2 is aligned with the positioning pin 3 a on the upper surface of the stage 3, and a part of the rubbing cloth 2 is projected from the outer periphery of the stage 3 as shown in FIG.

  Next, as shown in FIG. 3, the rubbing roller 5 is lowered toward the support roller 4. Then, a part of the end portion of the rubbing cloth 2 protruding from the outer periphery of the stage 3 is sandwiched between the support roller 4 and the rubbing roller 5 to adhere the rubbing cloth 2 to the rubbing roller 5. 4 and 5, the rubbing roller 5 is rotated to wind the rubbing cloth 2 around the rubbing roller 5.

  Further, as shown in FIG. 6, after the rubbing cloth 2 is wound around the rubbing roller 5, the rubbing roller 5 is rotated and the rubbing cloth 2 wound around the rubbing roller 5 is heated by the heating roller 7 to a predetermined pressure. Press it. Thus, the rubbing cloth 2 is wound around the outer periphery of the rubbing roller 5 with high adhesion. The heating roller 7 is heated to a predetermined temperature before being pressed against the rubbing cloth 2 with a predetermined pressure. By preheating to a predetermined temperature, the rubbing cloth 2 can be set to the predetermined temperature in a short time.

  In the winding method of the rubbing cloth 2 described above, the adhesiveness between the rubbing cloth 2 and the rubbing roller 5 can be improved by pressing the rubbing cloth 2 with a predetermined pressure while heating the rubbing cloth 2 with the heating roller 7.

  The present invention is not limited to the first embodiment described above, and various modifications and improvements can be made without departing from the spirit of the present invention. Hereinafter, other embodiments will be described. In addition, about the part similar to the rubbing cloth winding apparatus 1 which concerns on 1st Embodiment among the rubbing cloth winding apparatuses which concern on other embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted suitably.

<Embodiment 2>
A rubbing cloth winding device 1A according to a second embodiment (referred to as Embodiment 2) of the present invention will be described below with reference to FIGS. In addition, FIG. 7 is the schematic side view which looked at the rubbing cloth winding apparatus 1A which concerns on Embodiment 2 of this invention from the side surface.

  The rubbing cloth winding apparatus 1A according to the second embodiment has a configuration as shown in FIG. 7, and is a structure in which a brushing roller 8 is further added to the rubbing cloth winding apparatus 1 according to the first embodiment.

  The brushing roller 8 is disposed in the vicinity of the rubbing roller mounting portion 6 and brushes the rubbing cloth 2 wound around the rubbing roller 5. In addition, brushing gives the pile 2b of the rubbing cloth 2 the inclination of a fixed direction, and it can arrange | equalize the pile of the pile 2b by brushing.

  Further, the brushing roller 8 is, for example, provided with a metal brush on the outer periphery of the brushing roller 8 as shown in FIG. With the metal brush of the brushing roller 8, the brushing roller 8 can align the bristles of the pile 2 b of the rubbing cloth 2. Note that the brushing roller 8 has a rotating means, and is rotated in the direction of the arrow shown in FIG.

  Therefore, the rubbing cloth winding device 1A can align the uneven inclination of the pile 2b with the inclination in a certain direction by brushing the rubbing cloth 2 wound around the rubbing roller 5 by the brushing roller 8. The pile 2b of the rubbing cloth 2 is aligned with the inclination in a certain direction, that is, the fur line is aligned.

  As shown in FIG. 8B, the pile 2b of the rubbing cloth 2 wound around the rubbing roller 5 is difficult to align the inclination of the pile 2b in a fixed direction. Accordingly, when the rubbing roller 5 around which the rubbing cloth 2 having the inclined pile 2b is wound is used to perform the rubbing process on the substrate on which the alignment film is formed, the uniform rubbing process is not performed. There is a risk that unevenness in the appearance of the liquid crystal panel or liquid crystal alignment failure may occur.

  However, in the rubbing cloth winding device 1A, the rubbing cloth 2 wound around the rubbing roller 5 is brushed with the brushing roller 8 so that the pile 2b is aligned in a certain direction as shown in FIG. 8C. be able to.

  Further, since the brushing roller 8 brushes while heating the rubbing cloth 2, the pile 2b becomes flexible, and the pile 2b is easily inclined in a certain direction. And since the rubbing cloth 2 cools after the winding of the rubbing cloth 2 is completed, the pile 2b can maintain the inclination in a certain direction as it is. Therefore, the rubbing cloth winding device 1A can further align the inclination of the pile 2b in a certain direction.

  Next, a method for winding the rubbing cloth 2 according to the second embodiment of the present invention will be described with reference to FIG. In addition, the winding method of the rubbing cloth 2 according to the second embodiment of the present invention is the same as the winding method of the rubbing cloth 2 according to the first embodiment except that the brushing roller 8 is used.

  First, the rubbing roller 5 having an adhesive layer on the outer periphery is attached to the rubbing roller attaching portion 6. The rubbing roller 5 is previously provided with an adhesive layer on the outer periphery with a tape or the like.

  Then, the rubbing cloth is aligned with the positioning pin 3 a on the upper surface of the stage 3, and a part of the rubbing cloth 2 is arranged to protrude from the outer periphery of the stage 3.

  Next, the rubbing roller 5 is lowered toward the support roller 4. Then, a part of the end portion of the rubbing cloth 2 protruding from the outer periphery of the stage 3 is sandwiched between the support roller 4 and the rubbing roller 5 to adhere the rubbing cloth 2 to the rubbing roller 5. Then, the rubbing roller 5 is rotated to wind the rubbing cloth 2 around the rubbing roller 5.

  Further, as shown in FIG. 7, after the rubbing cloth 2 is wound around the rubbing roller 5, the rubbing roller 5 is rotated, and the rubbing cloth 2 wound around the rubbing roller 5 is heated by the heating roller 7 to a predetermined pressure. The rubbing cloth 2 is brushed with the brushing roller 8 while being pressed. Thereby, the pile 2b of the rubbing cloth 2 is aligned. The heating roller 7 is heated to a predetermined temperature before being pressed against the rubbing cloth 2 with a predetermined pressure. By preheating to a predetermined temperature, the rubbing cloth 2 can be set to the predetermined temperature in a short time.

  In the winding method of the rubbing cloth 2 described above, the rubbing cloth 2 is pressed with a predetermined pressure while the rubbing cloth 2 is heated by the heating roller 7, and the rubbing cloth 2 is brushed with the brushing roller 8. Can be aligned in a certain direction.

  The present invention is not particularly limited to Embodiment 1 and Embodiment 2 described above, and various changes and improvements can be made within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1, 1A Rubbing cloth winding apparatus 2 Rubbing cloth 2a Base cloth 2b Pile 3 Stage 3a Positioning pin 4 Support roller 5 Rubbing roller 6 Rubbing roller attaching part 6a Lifting part 6b Rotating part 7 Heating roller 7a Roller holding part 7b Roller base material 7c Roller hollow shaft 7d Heater part 7e Feeding lead wire 8 Brushing roller

Claims (4)

  A stage on which an upper surface of the rubbing cloth is arranged to protrude, and a support roller for supporting the lower surface of the protruding rubbing cloth, which is arranged at the end of the stage on the side where the rubbing cloth is extended. A rubbing roller having an adhesive layer on the outer periphery, which is disposed so as to face the upper side of the support roller, is attached, and a tip of a part of the rubbing cloth protruding between the support roller and the rubbing roller is sandwiched A rubbing roller mounting part having a lifting part for raising and lowering the rubbing roller to bond the rubbing cloth to the rubbing roller and a rotating part for rotating the rubbing roller to wind the rubbing cloth around the rubbing roller; Wrapped around the rubbing roller disposed in the vicinity of the rubbing roller mounting portion Serial with a rubbing cloth rolling apparatus characterized by comprising a heating roller for pressing with a predetermined pressure while heating the rubbing cloth. The rubbing cloth winding device according to claim 1,
A rubbing cloth winding apparatus, comprising: a brushing roller disposed in the vicinity of the rubbing roller mounting portion for brushing the rubbing cloth wound around the rubbing roller. Using the rubbing cloth winding device according to claim 1,
Attaching the rubbing roller having an adhesive layer on the outer periphery to the rubbing roller attaching portion;
Overhanging a part on the upper surface of the stage and arranging the rubbing cloth;
The rubbing roller is lowered toward the support roller, and a tip portion of a part of the rubbing cloth protruding from the stage is sandwiched between the support roller and the rubbing roller to bond the rubbing cloth to the rubbing roller. Steps,
Rotating the rubbing roller to wind the rubbing cloth around the rubbing roller;
And a step of pressing the rubbing cloth wound around the rubbing roller with a predetermined pressure while heating the rubbing cloth while rotating the rubbing roller. Using the rubbing cloth winding device according to claim 2,
Attaching the rubbing roller having an adhesive layer on the outer periphery to the rubbing roller attaching portion;
Overhanging a part on the upper surface of the stage and arranging the rubbing cloth;
The rubbing roller is lowered toward the support roller, and a tip portion of a part of the rubbing cloth protruding from the stage is sandwiched between the support roller and the rubbing roller to bond the rubbing cloth to the rubbing roller. Steps,
Rotating the rubbing roller to wind the rubbing cloth around the rubbing roller;
Pressing the rubbing cloth wound around the rubbing roller with a predetermined pressure while rotating the rubbing roller, and brushing the rubbing cloth with the brushing roller. A method of winding a rubbing cloth characterized by

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