KR101946314B1 - Guide roller - Google Patents

Abstract

Disclosed is a guide roller. According to an embodiment of the present invention, the guide roller can be non-detachable in spite of being in contact with a detergent by having a buffering cover covering an outer race be connected to and supported by an inner circumference surface of the outer race as well as an outer circumference surface of the outer race. In addition, a buffering effect of the buffering cover can be stably kept for a long time by having an inner circumference surface of the buffering cover be kept adhered to an outer circumference surface of the guide roller.

Description

Guide Rollers {GUIDE ROLLER}

The present invention relates to a guide roller, and relates to a guide roller which can be used for conveying a material in a process of manufacturing a semiconductor or a panel of a liquid crystal display device.

Semiconductors and liquid crystal displays are currently used in a wide range of industries.

These are defective when foreign substances or debris are adhered during the manufacturing process, so they are subjected to a cleaning process for removing foreign substances or debris very strictly. In this cleaning process, a cleaning agent having a property of easily removing a substance such as alcohol or acetone which is not easily removed by water alone can be used.

Therefore, various elements used for transferring semiconductors or intermediate products of a liquid crystal display device must be able to withstand a certain period of time even if they come in contact with the cleaning agent as described above.

In addition, these elements are in direct contact with intermediate products such as semiconductor panels or liquid crystal display panels in transit, which should not cause damage during transport.

Generally, since the guide rollers are used for the above-described conveyance of the panel, it is necessary to provide a guide roller that can withstand the cleaning agent as described above and does not cause damage even if it touches the semiconductor panel or the liquid crystal display panel.

For this purpose, a technique of coating the outer ring of a bearing with urethane rubber, such as Korean Patent No. 10-1335229 (hereinafter referred to as "Prior Art 1"), has been provided, but it has been modified by the above-mentioned cleaning agent, The rubber is frequently peeled off from the outer ring.

If the urethane rubber is peeled from the outer ring, a buffering effect can not be obtained. Therefore, the edges of the semiconductor panel or the liquid crystal display panel may be damaged, resulting in a loss such as discontinuing the manufacturing process and replacing the bearing.

Therefore, it is inevitable to provide a guide roller which can be used for a long period of time and which does not peel the buffer material.

Korean Registered Patent No. 10-1335229 (Title: Process for producing urethane rubber coated bearing and its bearing, registered on November 25, 2013)

An embodiment of the present invention is intended to provide a guide roller having a shock absorbing cover which is not peeled off even in contact with a cleaning agent.

Further, the embodiment of the present invention is intended to provide a guide roller in which the buffering effect of the buffer cover can be stably maintained for a long time.

According to an aspect of the present invention, there is provided a guide roller comprising: an inner ring coupled to a roller shaft; an outer ring disposed concentrically with the inner ring; a guide roller interposed between the inner ring and the outer ring to have a plurality of balls rotatably supporting the outer ring with respect to the inner ring; A guide roller may be provided which further includes a cushion cover coupled to the outer ring in a shape to surround the outer circumferential surface of the outer ring.

The outer ring is provided with ring-shaped support rib grooves which are arranged on the inner circumferential surface of the outer ring and are recessed in the outer circumferential direction, at least one support leg hole connecting the support rib grooves from the outer circumferential surface of the outer ring, A ring-shaped fixed rib groove which is arranged to be recessed toward an intermediate portion of the outer ring and at least one connection leg hole which connects the fixed rib groove and the support rib groove, respectively.

The cushioning cover includes a ring-shaped support rib inserted into the support rib groove, a cover body surrounding the outer circumference of the outer ring, a ring-shaped fixed rib connected to the edge portion of the cover body and inserted into the fixing rib groove, A connecting leg connected to the fixed rib, the intermediate portion passing through the connecting leg hole and the other end connected to the supporting rib, one end connected to the inner circumferential surface of the cover body, the middle portion passing through the supporting leg hole and the other end connected to the supporting rib May have support legs.

At this time, the cover body, the support ribs, the fixing ribs, the connection legs, and the support legs may be integrally formed.

On the other hand, at least one contact leg groove having a T-shaped cross section is formed on the outer peripheral surface of the outer ring, and at least one contact rib inserted into the contact leg groove may be formed on the inner peripheral surface of the cover body.

The inner and outer rings described above may be made of PEEK resin, and the buffer cover may be made of fluororesin.

According to the embodiment of the present invention, the cushioning cover covering the outer ring is connected to the inner circumferential surface as well as the outer circumferential surface of the outer ring, so that the cushioning cover can be prevented from being peeled off even if it comes into contact with the cleaning agent.

Further, in the embodiment of the present invention, the inner circumferential surface of the buffer cover is held in close contact with the outer circumferential surface of the guide roller, so that the buffering effect of the buffer cover can be stably maintained for a long time.

1 is a view illustrating a use state of a guide roller according to an embodiment of the present invention;
Fig. 2 is a perspective view of the guide roller shown in Fig.
Fig. 3 is an exploded perspective view of the guide roller shown in Fig.
Fig. 4 is an exploded perspective view of the outer ring and the shock absorbing cover shown in Fig.
5 is a view for explaining a modification of the guide roller according to an embodiment of the present invention;

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 illustrates a use state of the guide roller 100 according to an embodiment of the present invention.

Referring to FIG. 1, a guide roller 100 according to an embodiment of the present invention supports a panel 10 transported in a direction indicated by A in a transportable manner. This illustrates a cleaning process during the manufacturing process of a semiconductor or a liquid crystal display device, and the panel 10 means an intermediate product of a semiconductor or a liquid crystal display device.

In the cleaning process, the cleaning agent 21 is sprayed from the cleaning agent spraying device 20 toward the panel 10 as schematically shown. In the cleaning process, dust, foreign matter, and debris generated in the cutting process are removed from the surface of the panel 10. In the washing process, as described above, a cleaning agent 21 is used which can easily remove substances which are not easily removed by water, such as alcohol or acetone, in order to increase the washing efficiency.

At this time, the panel 10 forms a predetermined angle? With respect to a virtual surface perpendicular to the gravitational direction so that the sprayed cleanser 21 does not remain on the panel 10 but flows in one direction by gravity It is common.

Accordingly, the possibility that the cleaning agent (21) is brought into contact with the guide roller (100) supporting the panel (100) becomes very high.

In addition, the guide roller 100 should be able to have a buffering effect so that the edges of the panel 10 are not damaged during conveyance.

For this purpose, the guide roller 100 according to an embodiment of the present invention is configured to obtain a buffering effect with high chemical resistance, which will be described with reference to FIG. 2 to FIG.

FIG. 2 is a perspective view of the guide roller 100 shown in FIG. 1, and FIG. 3 is an exploded perspective view of the guide roller 100 shown in FIG.

2 and 3, the guide roller 100 according to an embodiment of the present invention includes an inner ring 110, a ball 130, an outer ring 150, and a cushion cover 170.

The inner ring 110 has a cylindrical shape, a shaft hole 112 is formed at an intermediate portion thereof, and a ball groove 111 is formed at an outer peripheral surface thereof. Here, a roller shaft (not shown) is inserted into the shaft hole 112 and engaged with the inner ring 110.

The outer ring 150 is disposed concentrically with the inner ring 110 around the shaft hole 112. A ball groove 151 is formed on the inner circumferential surface of the outer ring 150. The cushion cover 170 is coupled to the outer ring 150 in such a shape as to cover the outer circumferential surface and a part of both side surfaces of the outer ring 150.

The ball 130 is interposed between the outer circumferential surface of the inner ring 110 and the inner circumferential surface of the outer ring 130 so that the outer ring 130 is smoothly rotated with respect to the inner ring 110. A plurality of balls 130 are dispersed and arranged, and the diameter and number thereof can be added or subtracted as required.

The plurality of balls 130 are seated in the ball grooves 111 of the inner ring 110 and the ball grooves 151 of the outer ring 150 to cause rolling contact on both sides when the outer ring 150 is relatively rotated with respect to the inner ring 110 Thereby minimizing the frictional force.

Although not shown, the guide roller 100 further includes a retainer that keeps a plurality of balls 130 at a predetermined interval. The retainer is well known in the art and is not shown for the sake of explanation.

Reference numeral 174, which is not described, is a support rib 174 disposed on the inner peripheral surface of the outer ring 150, which will be described with reference to FIG.

Fig. 4 is an exploded perspective view of the outer ring 150 and the cushioning cover 170 shown in Fig.

Referring to FIG. 4, the cushioning cover 170 is coupled to the outer ring in a shape surrounding the outer circumferential surface of the outer ring 150.

The outer ring 150 is formed with a fixed rib groove 152, a connecting leg hole 153, a supporting rib groove 154 and a supporting leg hole 155 in addition to the ball groove 151 of the inner circumferential surface described above.

A support rib groove 154 is formed on the inner circumferential surface of the outer ring 150 and the support rib groove 154 is disposed on both sides of the ball groove 151 in a direction parallel to the ball groove 151. Like the ball groove 151, the support rib groove 154 has a ring shape recessed toward the outer peripheral surface of the outer ring 150.

The support rib grooves 154 may be formed as a pair as shown in FIG. That is, the number of the support rib grooves 154 can be increased when the outer circumferential surface of the outer ring 150 is wide, and the number of the support rib grooves 154 can be reduced if the outer circumferential surface is narrow.

The support leg hole 155 is formed to have a shape in which the support rib groove 154 is connected from the outer circumferential surface of the outer ring 150. That is, the support leg hole 155 has a shape in which a through hole is formed in the direction of the central axis from the outer peripheral surface of the outer ring 150, and the end of the through hole reaches the support rib groove 154.

At least one support leg hole 155 may be formed, and the number of the support leg holes 155 may be increased as necessary. That is, the number of the support leg holes 155 can be increased as the diameter of the outer ring 150 increases.

In the present embodiment 100, four pairs of support leg holes 155 are formed at 90 degrees around the roller shaft (not shown) at a distance of 90 degrees, So as to form an interval.

The fixed rib grooves 152 are formed on both surfaces of the outer ring 150 and are formed to have a ring shape recessed from both surfaces of the outer ring 150 toward the middle portion thereof.

The fixing rib groove 152 is formed with a connecting leg hole 153. The connecting leg hole 153 is formed such that the supporting rib groove 154 extends through the fixing rib groove 152. That is, one end of the connecting leg hole 153 is connected to the fixing rib groove 152 and the other end is connected to the supporting rib groove 154.

In the present embodiment 100, the connecting leg holes 153 are arranged at equal intervals of 90 degrees around a roller shaft (not shown), but the number may be increased or decreased as required.

The cushioning cover 170 includes a cover body 171. The cover body 171 is formed with a fixing rib 172, a connecting leg 173, a supporting rib 174 and a supporting leg 175 . The buffer cover 170 will be described with reference to FIGS. 3 and 4. FIG.

The cover body 171 surrounds the outer peripheral surface of the outer ring 150. That is, the inner circumferential surface of the cover body 171 is disposed so as to be in close contact with the outer circumferential surface of the outer ring 150.

The fixed rib 172 is connected to both side edge portions of the cover body 171 and has a ring shape protruding to correspond to the fixed rib groove 152 and inserted into the fixed rib groove 152.

One end of the connecting leg 173 is connected to the fixing rib 172 and the middle portion of the connecting leg 173 penetrates the connecting leg hole 153 and the other end of the connecting leg 173 is connected to the supporting rib 174. [ Lt; / RTI >

At this time, the support rib 174 has a ring shape corresponding to the support rib groove 154, and is disposed in a shape inserted into the support rib groove 154 as shown in FIG.

One end of the support leg 175 is connected to the inner circumferential surface of the cover body 171, the middle portion of the support leg 175 passes through the support leg hole 155, and the other end has a shape connected to the support rib 174.

The cover body 171 and the support ribs 174, the fixing ribs 172, the connection legs 173 and the support legs 175 described above are integrally formed.

The cushioning cover 170 may be made of a fluororesin having elasticity and the cushioning cover 170 may be integrally formed as described above by forming the cushioning cover 170 additionally on the outer ring 150 Can be implemented.

That is, although not shown, after inserting the outer ring 150 having the above-described configuration into the mold, the molten fluororesin is injected into the mold and then the pressure is applied to the stationary rib groove 152, The molten fluororesin can be introduced into the support ribs 153, the support rib grooves 154, and the support leg holes 155, respectively.

After the fluororesin is cured, the outer ring 150 is separated from the mold, and the unnecessary portion of the cured fluororesin is removed, thereby completing the cushioning cover 170 as a single body.

The cushioning cover 170 thus formed is supported on both sides of the outer ring 150 by the side edges of the cushioning cover 170 by the fixing ribs 172 inserted into the fixing ribs 152, Can be prevented from being peeled off from the outer ring (150).

The connection leg 173 formed on the fixed rib 172 is connected to the support rib 174 disposed on the inner peripheral surface of the outer ring 150 to prevent the fixed rib 172 from being separated from the fixed rib groove 152, The cushion cover 170 can be held firmly coupled to the outer ring 150.

Since the inner circumferential surface of the cushioning cover 170 is connected to the support ribs 174 by the support legs 175 disposed in a shape penetrating the outer circumferential surface of the outer ring 150, the outer circumferential surface of the outer ring 150 and the cushioning cover 170 Can be maintained in a close contact state.

Therefore, the guide roller 100 according to an embodiment of the present invention is in contact with the cleaning agent 21 as illustrated in Fig. 1, so that the cleaning agent 21 can be prevented from contacting the inner peripheral surface of the cushioning cover 170 and the supporting surface So that the cushioning cover 170 can be prevented from being peeled off from the outer ring 150 by the above-described structure.

Accordingly, the guide roller 100 according to an embodiment of the present invention can stably guide the transfer of the panel 10 for a long time, and the cushion cover 170 interposed between the panel 10 and the outer ring 150, The buffering effect can be continued.

FIG. 5 is a view for explaining a modification example 150a of the outer ring of the guide roller according to the embodiment of the present invention.

Referring to FIG. 5, a contact groove groove 156 having a T-shaped cross section may be formed on the outer circumferential surface of the outer ring 150a.

Although not shown, a contact rib having a T-shaped cross section may be formed on the inner peripheral surface of the cushioning cover 170 so as to correspond to the contact rib groove 156. The tight contact state between the inner circumferential surface of the cushioning cover 170 and the outer circumferential surface of the outer ring 150a can be more firmly maintained even in the portion where the support legs 175 are not disposed.

This is because when the guide roller 100 rotates and guides the panel 10, if a minute lifting is generated between the inner circumferential surface of the cushioning cover 170 and the outer circumferential surface of the outer ring 150a, a wrinkle is formed in the cushioning cover 170 So as to prevent the panel 10 from generating vibration.

The contact rib grooves 156 and the contact ribs (not shown) inserted therein prevent wrinkles from being generated in the buffer cover 170, thereby preventing the edge portions of the panel 10 from being damaged by vibration, The yield of the liquid crystal display device can be further improved.

For reference, the inner ring 110 and the outer ring 150 described above may be made of a high-formability PEEK (polyetheretherketone) resin having both excellent mechanical properties and chemical properties. The ball 130 may be made of a ceramic material having excellent mechanical and chemical properties and maintaining a certain size even when the environment such as temperature or pressure changes.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments, It is to be understood that other embodiments may be easily suggested by adding, changing, deleting, adding, or the like elements, but this is also within the scope of the present invention.

100: guide roller 110: inner ring
130: Ball 150: Outer ring
151: ball groove 152: fixed rib groove
153: connecting leg hole 154: supporting rib groove
155: support leg hole 156: contact rib groove
170: buffer cover 171: cover body
172: fixed rib 173: connecting leg
174: Support ribs 175: Support legs

Claims (6)

1. A guide roller having an inner ring coupled to a roller shaft, an outer ring disposed concentrically with the inner ring, and a plurality of balls interposed between the inner ring and the outer ring to rotatably support the outer ring with respect to the inner ring,
And a cushion cover coupled to the outer ring in such a shape as to surround the outer circumferential surface of the outer ring,
In the outer ring,
A ring-shaped support rib groove which is disposed on an inner peripheral surface of the outer ring and is recessed in the outer peripheral direction;
At least one support leg hole connecting the support rib groove from an outer circumferential surface of the outer ring,
A ring-shaped fixed rib groove which is disposed on both surfaces adjacent to the outer peripheral surface of the outer ring and which is recessed toward an intermediate portion of the outer ring,
At least one connecting leg hole connecting the fixed rib groove and the supporting rib groove
Respectively,
The cushion cover
A ring-shaped support rib inserted into the support rib groove,
A cover body surrounding the outer circumferential surface of the outer ring,
A ring-shaped fixed rib which is connected to an edge portion of the cover body and is inserted into the fixed rib groove,
A connection leg connected at one end to the fixed rib, an intermediate portion passing through the connection leg hole and the other end connected to the support rib,
One end portion is connected to the inner circumferential surface of the cover body, the middle portion thereof penetrates the support leg hole, and the other end portion has a support leg connected to the support rib,
The cover body, the support ribs, the fixing ribs, the connection legs, and the support legs are integrally formed
Guide roller.
The method according to claim 1,
At least one contact leg groove having a T-shaped cross section is formed on the outer peripheral surface of the outer ring,
And at least one contact rib inserted into the contact leg groove is formed on an inner circumferential surface of the cover body
Guide roller.
The method according to claim 1,
The connecting leg holes form an angle of 90 degrees about the roller axis and four of them are arranged at regular intervals
Guide roller.
The method according to claim 1,
The support leg holes form an angle of 90 degrees about the roller axis, and four of the support leg holes are arranged at regular intervals
Guide roller.
The method according to claim 1,
Wherein the inner ring and the outer ring are made of PEEK resin
Guide roller.
6. The method of claim 5,
The buffer cover is made of a fluororesin
Guide roller.

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