KR101392837B1 - Adhesive coating apparatus having form tracking functions - Google Patents

Abstract

The present invention relates to an adhesive coating apparatus having a shape tracing function that allows an edge surface of an adhesion target to be coated with an adhesive while being guided to maintain a predetermined distance from an edge of the adhesion target regardless of shape of the edge of the adhesion target to be coated with the adhesive so that the error rate of an adhesive coat operation can be reduced and productivity can be improved. The present invention includes an adhesive discharge unit that has a jetting valve which discharges the adhesive to the edge surface of the adhesion target, and a jetting valve driving motor which rotates the jetting valve so that a discharge port of the jetting valve faces the edge surface of the adhesion target; a moving unit that moves the adhesive discharge unit along the edge surface of the adhesion target; and a control unit that has imaging means for capturing an image of the edge of the adhesion target, and calculating means for controlling the adhesive discharge unit based on the image of the edge of the adhesion target to face the edge surface of the adhesion target, and controlling the moving unit to maintain a predetermined gap from the adhesive discharge unit and the edge surface of the adhesion target.

Description

ADHESIVE COATING APPARATUS HAVING FORM TRACKING FUNCTIONS [0002]

More particularly, the present invention relates to an adhesive applying device capable of applying an adhesive to an edge surface of an object to be adhered while being guided to maintain a certain distance from the edge of the object to be adhered regardless of the shape of the edge of the object to be adhered To an adhesive applying apparatus having a shape tracking function.

In general, the display panel can be applied to a large-area glass substrate by a low-temperature process, and is widely used as a liquid crystal display device having an advantage that it can be sufficiently driven even at a low voltage.

Such a display panel includes a liquid crystal panel assembly including a liquid crystal panel for displaying the image data using the optical properties of the liquid crystal and a driving circuit for driving the liquid crystal panel, a backlight assembly for supplying light for screen display, And a mold frame for holding and holding the assembly.

The liquid crystal panel assembly includes a substrate fabrication process for forming a TFT substrate on which a TFT array is formed on two large glass substrates (hereinafter referred to as "mother substrates") and a color filter substrate for forming common electrodes, Forming a plurality of liquid crystal cells by forming alignment layers and spacers on the mother substrate and then forming a plurality of liquid crystal cells and then cutting the developed liquid crystal cells into various liquid crystal cells using various cutting tools to form liquid crystal panels; A liquid crystal cell forming process for injecting a predetermined liquid crystal through the liquid crystal cell and a module process for attaching a driving circuit for supplying an electric signal to the liquid crystal cell.

On the other hand, in the above-described liquid crystal panel forming step, an adhesive is applied to the rim surface of the liquid crystal panel.

In order to apply an adhesive to the edge of the liquid crystal panel, an adhesive applicator is used. As a representative example thereof, Korean Patent Publication No. 2010-0043367 (published on Apr. 29, 2010, entitled " Korean Unexamined Patent Publication No. 2002-0021862 (published on Mar. 09, 2012, entitled "Non-contact adhesive application device and application method using the same" 2012-0051143 (published on May 22, 2012, entitled "Adhesive Application Device and Adhesive Application Method Using the Same") and Korean Patent Publication No. 2012-0072003 (Published on July 03, 2012, "Non-contact adhesive application apparatus and method").

In the above-mentioned patents, the adhesive discharging means for discharging the adhesive is movably disposed along the longitudinal direction of the edge surface to which the adhesive is to be applied, and the loading means for loading the adhesive object guides the object to be adhered to the adhesive position And is configured to rotate the object to be bonded such that the edge faces to which the adhesive is to be applied and the adhesive dispensing means face each other.

However, since the adhesive dispensing means and the edge surfaces of the conventional adhesive dispensing devices described above can maintain a constant gap with respect to the adhesive object having a rectangular flat plate shape when viewed from the plane, adhesive droplets of the same size are formed on the edge surfaces However, convex when the edge face of the object to be bonded is convex when viewed from the plane, convex when the concave curved or convex because the concave edge face and the adhesive dispensing means can not maintain a constant distance, The adhesive droplets of the discharged adhesive can not be formed, and the discharged adhesive can not be accurately discharged to the convex portion or the bonding position of the concave edge surface.

Due to such a problem, since the adhesive is applied to the upper and lower surfaces of the object to be bonded, the defect rate increases.

Accordingly, there is a need to develop a device capable of applying an adhesive to the edge surface of an object to be bonded while being guided to maintain a certain distance from the edge of the object to be bonded, regardless of the shape of the edge of the object to be adhered.

INDUSTRIAL APPLICABILITY The present invention enables the adhesive to be applied to the rim surface of the object to be bonded while being guided to maintain a certain distance from the rim of the object to be bonded regardless of the shape of the object to be bonded to which the adhesive is to be applied, And an object of the present invention is to provide an adhesive applying device having a shape tracking function capable of improving the adhesion.

The technical objects to be achieved by the present invention are not limited to the above-mentioned technical problems.

According to another aspect of the present invention, there is provided an adhesive applying apparatus having a shape tracking function, including: a jetting valve for jetting an adhesive onto a rim of an object to be bonded; a jetting valve for jetting the jetting valve, An adhesive discharging portion having a jetting valve driving motor for rotating the nozzle; A moving part for moving the adhesive discharge part along the rim surface of the object to be bonded; And a control unit for controlling the adhesive discharge unit so as to face the edge surface of the object to be bonded based on the edge image of the object to be adhered and to control the adhesive discharge unit and the edge surface of the object to be adhered And a control unit for controlling the moving unit to maintain the moving unit.

Specifically, the calculating means can control the jetting valve driving motor so as to face the edge of the object to be bonded and the jetting port of the jetting valve, based on the image signal outputted from the photographing means.

Specifically, the adhesive discharging portion further includes a holder for connecting the jetting valve to the driving shaft extending downward from the jetting valve driving motor, wherein the holder includes: a first arm mounted horizontally on the driving shaft; And a second arm extending vertically downward from the extended end of the first arm.

More specifically, the ejection port of the jetting valve may be mounted on the second arm so as to face the stretching line during vertical virtual rotation of the drive shaft.

Specifically, the photographing means can be mounted on the second arm so that the photographing means does not interfere with the jetting valve so that the center axis of the image taken by the photographing means coincides with the vertical virtual center axis of rotation of the drive shaft.

Specifically, the moving unit includes: a first conveying unit having a first guide body extending horizontally in the X-axis direction and a first slider moved along the longitudinal direction of the first guide body by operation of the first guide body; A second guide body extending horizontally in the Y axis direction and having a lower portion mounted on an upper portion of the first slider and a second guide body having a second slider moved in the longitudinal direction of the second guide body by the operation of the second guide body, A transfer unit; A third guide body extending perpendicularly to the Z-axis direction and mounted on one end of the second slider, a second guide body movably moved along the longitudinal direction of the third guide body by the operation of the third guide body, And a third conveying unit having a three-slider.

Specifically, the calculation means calculates the distance between the center point of the photographed image and the edge position between the jetting valves on the basis of the image signal outputted from the photographing means, and then calculates the distances between the first transfer unit and the second transfer unit, 2 transfer unit can be controlled.

As described above, according to the present invention, there is provided an adhesive applying apparatus having a shape tracking function, including: an adhesive discharging unit for discharging an adhesive to a rim of an object to be adhered; a moving unit for moving the adhesive discharging unit along a rim surface of the object to be adhered; The edge of the object to be bonded is traced with an image and the adhesive discharge portion is controlled so as to face the edge face of the object to be bonded with reference to the edge image of the object to be adhered and the edge portion of the adhesive discharge portion and the object to be adhered are kept at a constant interval, It is possible to apply the adhesive to the edge face of the object to be bonded while being guided to maintain a certain distance from the edge face of the object to be bonded regardless of the shape of the edge of the object to be coated to which the adhesive is to be applied, Benefits of Reducing Productivity There.

1 is a perspective view of an adhesive applying apparatus having a shape tracking function according to the present invention,
Fig. 2 is a side view of the adhesive application device shown in Fig. 1, and
FIGS. 3A and 3B are views for explaining the operating state of the adhesive applying apparatus shown in FIG. 1, and are images taken by the photographing means shown in FIG. 1. FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same components are denoted by the same reference symbols whenever possible. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

FIG. 1 is a perspective view of an adhesive applying apparatus having a shape tracking function according to the present invention. The adhesive applying apparatus 100 having a shape tracking function according to the present invention includes an adhesive agent O (see FIG. 2) A moving part 130 for moving the adhesive discharging part 110 along the edge surface of the object to be adhered and a frame image of the object to be adhered The adhesive dispensing unit 110 is controlled so as to face the edge face of the object of bonding O on the basis of the edge image of the object O and at the same interval as the edge face of the adhesive dispensing unit 110 and the object of bonding O And a control unit 160 for controlling the moving unit 130 to maintain the moving unit 130.

First, the moving unit 130 includes first, second, and third transfer units 132, 138, and 146. 1, the first transfer unit 132 moves the adhesive dispensing unit 110 in the X axis direction and the second transfer unit 138 moves the adhesive dispensing unit 110 in the Y axis direction . The third transfer unit 146 moves the dispenser 110 in the Z-axis direction.

The first conveying unit 132 includes a first guide body 134 extending horizontally in the X axis direction as shown in the drawing and a second guide body 134 extending in the longitudinal direction of the first guide body 134 And a first slider 136 which is moved along the first slider 136. Here, the first guide main body 134 is supported by the pair of subframes F extending vertically in the table T, and the lower portion adjacent to both ends thereof has a predetermined height. The second transfer unit 138 is mounted on the first transfer unit 132 thus formed.

The second transfer unit 138 includes a second guide body 140 having a lower portion fixedly mounted on an upper portion of a first slider 136 extending horizontally in the Y-axis direction and having a horizontal plate shape, And a second slider 142 which is moved along the longitudinal direction of the second guide body 140 by the operation of the second guide body 140. At this time, the second slider 142 is provided in the shape of a horizontal plate like the first slider 136, and a first connection bracket 144 in the form of a plate is mounted on one end of the second slider 142. That is, the first connection bracket 144 mounted on one end of the second slider 142 and the second slider 142 has a substantially L-shaped shape when viewed from the side.

The third conveying unit 146 includes a third guide body 148 extending perpendicularly to the Z axis direction as shown in the figure and a second guide body 148 extending from the third guide body 148 by operation of the third guide body 148. [ And a third slider 150 moved along the longitudinal direction. The third guide body 148 is fixedly mounted on one end of the second slider 142, that is, the first connection bracket 144 mounted on one end of the second slider 142, as shown in the figure. The third slider 150 is provided in the form of a vertical plate. A second connection bracket 152 is mounted on the front surface of the third slider 150 so as to have a substantially "

Preferably, the first, second, and third transfer units 132, 138, 146 may be either a conventional rodless cylinder or a linear guide device.

The adhesive agent discharging unit 110 is disposed on the moving unit 130 thus formed.

The adhesive discharging unit 110 includes a jetting valve 112 for discharging a liquid adhesive on the edge of the object to be bonded O carried in upstream equipment and a jetting valve driving motor 116).

The jetting valve 112 receives a liquid adhesive supplied from the outside. The adhesive contained in the jetting valve 112 is discharged through the discharge port 114 by the operation of the jetting valve 112. That is, the jetting valve 112 opens the discharge port 114 for a very short time under pressure with the adhesive contained therein. When the discharge port 114 is opened for a short period of time, the liquid adhesive passes through the jetting valve 112 And is discharged through the discharge port 114. [ Here, the structure of the jetting valve 112 and the structure for supplying the liquid adhesive to the inside of the jetting valve 112 are well known and will not be described in detail.

The jetting valve driving motor 116 is fixedly mounted on a second connection bracket 152 mounted on the front surface of the third slider 150, that is, the front surface of the third slider 150. At this time, the jetting valve driving motor 116 is fixedly mounted on the second connecting bracket 152 so that the driving shaft 118 extending from the jetting valve driving motor 116 extends vertically to the lower side, that is, the table T side. The holder 120 is mounted on the driving shaft 118 of the jetting valve driving motor 116 as shown in FIG. The holder 120 connects the jetting valve 112 to the jetting valve driving motor 116. The holder 120 includes a first arm 122 mounted horizontally at an end of the driving shaft 118, The ejection port 114 of the jetting valve 112 is connected to the second arm 124 so as to extend perpendicularly to the vertical direction of the drive shaft 118. The second arm 124 extends vertically from the extended end of the first arm 122, And is mounted so as to face a virtual center of rotation axis CL1.

The control unit 160 controls the moving unit 130 and the adhesive dispensing unit 110 based on the image photographed by the photographing unit 162. The photographing unit 162 photographs the rim of the adhesive object O, And calculation means (164) for controlling the jetting valve driving motor (116).

The photographing means 162 is mounted on the second arm 124 of the holder 120 on one side so as not to interfere with the jetting valve 112. The photographing means 162 mounted in this way outputs a signal I of the image of the edge of the sticking object O adjacent to the tip of the jetting valve 112 and the tip of the jetting valve 112. At this time, 162 are mounted such that the rotation center axis CL1 of the drive shaft 118 and the center point CL2 of the image I photographed by the photographing means 162 coincide with each other, do. Preferably, the imaging means 162 may be a conventional imaging device, i. E. A camera, or a conventional image sensor.

On the other hand, the computing means 164 computes the jetting valve driving motor 116 so that the edges of the jetting object 112 and the jetting object O are opposed to each other based on the image signal output from the photographing means 162. [ . The calculation means 164 calculates the distance between the center point CL2 of the captured image I and the edge position P between the jetting valve 112 on the basis of the image signal outputted from the photographing means 162 The first and second transfer units 132 and 138 are controlled so that the center point CL2 of the rear image I is transferred to the edge position P. [ Thus, as the center point CL2 of the image I is transferred to the edge position P, the jetting valve 112 always maintains a constant gap with the edge of the object O to be bonded (see FIGS. 3A and 3B).

The arithmetic means 164 drives the jetting valve driving motor 116 so that the edge of the jetting valve 112 faces the edge of the object to be adhered, And stops driving the jetting valve driving motor 116 when the edge and the tip of the jetting valve 112 face each other.

The calculating means 164 calculates the distance between the rim of the object to be bonded O and the tip of the jetting valve 112, that is, the state in which the jetting port 114 of the jetting valve 112 faces each other in the image signal photographed by the photographing means 162 When the center point CL2 of the photographed image I is spaced apart from the edge of the tip of the jetting valve 112, the center point CL2 of the image I and the edge position P between the jetting valve 112 The first and second transfer units 132 and 138 are driven so that the center point CL2 of the image I is transferred to the frame position P and the center point CL2 of the image I and the edge position P), the first and second transfer units 132 and 138 are stopped. Here, a conventional method is used for calculating the distance between the center point CL2 of the image I and the edge position P between the jetting valve 112, for example, the center point CL2 of the image I, A method of calculating the distances from the coordinates of the center point CL2 of the image I to the coordinates of the frame position P after extracting the frame position P and the frame position P can be used.

The adhesive applying apparatus 100 having the shape tracking function according to the present invention includes an adhesive discharging unit 110 for discharging an adhesive onto the edge surface of the object to be bonded O, A moving part 130 for moving the discharging part 110 and an edge image of the object to be bonded O are picked up and an adhesive image is formed on the edge of the object to be bonded O, And a control unit 160 controlling the discharging unit 110 and controlling the moving unit 130 so as to maintain a constant gap between the adhesive discharging unit 110 and the edge surface of the object to be bonded O. [ The adhesive can be applied to the edge surface of the bonding object O while being guided to maintain a certain distance from the edge of the bonding object O regardless of the shape of the edge of the object O to improve the productivity by reducing the defective rate due to the adhesive application Also Can.

The adhesive applying apparatus 100 having the shape tracking function as described above is not limited to the configuration and the operation of the embodiments described above. The embodiments may be configured so that all or some of the embodiments may be selectively combined so that various modifications may be made.

100: Adhesive application device having shape tracking function
110: adhesive dispensing part 112: jetting valve
114: discharge port 116: jetting valve drive motor
118: drive shaft 120: holder
130: moving part 132: first conveying unit
138: second conveying unit 146: third conveying unit
160: control unit 162: photographing means
164: computing means O: object to be bonded
CL1: Center of rotation axis CL2: Center point of the captured image

Claims (7)

An adhesive discharging portion having a jetting valve for discharging the adhesive to the edge surface of the object to be bonded and a jetting valve driving motor for rotating the jetting valve so that the jetting port of the jetting valve faces the edge face of the object to be adhered;
A moving unit that moves the adhesive discharging unit along the X-axis direction, the Y-axis direction, and the Z-axis direction along the rim surface of the object to be bonded; And
And a controller for controlling the adhesive discharge unit to face the edge surface of the object to be bonded based on the edge image of the object to be adhered, And control means for controlling the moving unit to maintain a constant distance from the surface,
Wherein said calculating means comprises:
Controls the jetting valve driving motor so as to face the jetting port of the jetting valve and the edge face of the object to be adhered based on the image signal output from the photographing means, And a shape tracking function of calculating a distance between a center point of the photographed image and a border position between the jetting valve and controlling the moving unit so that the center point of the image is transferred to the edge position side.
delete The method according to claim 1,
The adhesive-
And a holder for connecting the jetting valve to a driving shaft extending downward from the jetting valve driving motor,
Wherein the holder comprises:
A first arm mounted horizontally on the drive shaft; And
And a second arm vertically extending from an extending end of the first arm to a lower side.
The method of claim 3,
Wherein the second arm has a shape tracking function in which the ejection port of the jetting valve is mounted so as to face a stretching line during vertical virtual rotation of the driving shaft.
The method of claim 3,
Wherein the photographing means has a shape tracking function in which one side surface is mounted on the second arm so as not to interfere with the jetting valve so that the center axis of the image taken by the photographing means coincides with the vertical virtual center axis of the drive shaft Adhesive application device.
The method according to claim 1,
The moving unit includes:
A first conveying unit having a first guide body extending horizontally in the X axis direction and a first slider moved along the longitudinal direction of the first guide body by the operation of the first guide body;
A second guide body extending horizontally in the Y-axis direction and having a lower portion mounted on an upper portion of the first slider, and a second slider moved along the longitudinal direction of the second guide body by the operation of the second guide body A second transfer unit; And
A third guide body extending perpendicularly to the Z-axis direction and mounted on one end of the second slider, and a third guide body which is moved along the longitudinal direction of the third guide body by the operation of the third guide body, And a third transfer unit having a third slider to be mounted.
delete

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