KR20110033670A - Stocker - Google Patents

Abstract

PURPOSE: A stocker is provided to prevent a cassette from being damaged while transferring it by sensing the right position of the cassette to be mounted in a fork unit. CONSTITUTION: In a stocker, a stoker main body moves along a rail(110). A fork unit(330) loads/unloads a target in/from a shelf. A supporting part(200) is connected to the stoker body and supports the fork unit. A sensor(400) sense the right position of the target which is loaded in the fork unit. An up/down drive unit enables the fork unit to be up and down through the supporting part.

Description

Stalker {Stocker}

The present invention relates to a stocker, and more particularly, a phenomenon in which an exact position of the object to be transported on the fork unit can be sensed so that the object to be transported may be damaged during the transport or the loading position may be incorrect. It is about a stalker that can prevent.

In flat panel displays such as liquid crystal display (LCD) panels, in particular, the role and function of glass substrates (hereinafter referred to as substrates) are increasingly recognized as an important task, which is determined by the number of circuit elements formed on the substrate. This is because the overall quality of the display panel is greatly affected.

At the production site, in order to maximize work efficiency and increase the cleanliness of the working environment, a plurality of substrates completed through various processes are stored in a cassette through an index robot, and the cassettes containing the substrates are transferred by a stocker. And loaded into the loading cell of the cassette storage system or taken out through a reverse process.

In other words, the substrate is not transferred to the next LCD manufacturing facility immediately after the process is completed in one LCD manufacturing facility, but solves the buffering problem caused by the difference in processing capacity and processing time of each LCD manufacturing facility. To do this, it is loaded into a cassette and then temporarily stored in a cell of a cassette storage system, and transferred to an LCD manufacturing facility that performs the process as needed.

At this time, a stocker for handling the cassette is provided at the front of the cassette storage shelf in order to draw the cassette into and out of the cassette storage shelf. As the stocker moves along the rail, the fork unit at the upper portion of the stacker loads or unloads the cassette from the shelf.

In this case, when the cassette is held by the fork unit, the cassette should be correctly positioned at the stocker fork unit. Otherwise, the cassette may be displaced and may fall during transport, be damaged, or the loading position may be incorrect. There is a need for structural improvement.

On the other hand, in order for the fork unit to load the cassette onto the shelf or to carry it out of the shelf, the fork unit must be operated out of the stocker body, and the fork unit must be driven up / down with respect to the stocker body. do.

In this case, a guide for guiding the up / down movement of the fork unit may be used. Even when the guide is applied, the guide is easily broken or deformed even if the center of gravity according to the load of the cassette acts at a position separated from the center area of the stocker body. It is anticipated that structural improvements should be carried out together.

SUMMARY OF THE INVENTION An object of the present invention is to provide a stocker capable of detecting the exact position of the object to be transported seated on the fork unit so that the object to be transported may be broken during transportation and be damaged or the loading position may be incorrect. will be.

Another object of the present invention, in applying the guide for guiding the up / down movement of the fork unit, even if the center of gravity according to the load of the cassette acts at a position away from the center area of the stocker body to prevent the guide from being broken or deformed It is to provide a stalker that can.

The object is, according to the present invention, a stocker body disposed on the rail to move along the rail; A fork unit which is coupled to the stocker body and moves with the stocker body and loads or transports the object to be transferred from the shelf; A unit support part connected to the stocker body to support the fork unit; And coupled to the stocker body, it is achieved by a stocker characterized in that it comprises a sensing unit for detecting the correct position for the object to be transported seated on the fork unit.

Here, at least one side may further include an up / down driving unit coupled to the stocker body so as to be connected to the unit supporting part to drive the fork unit up / down through the unit supporting part.

The up / down drive unit may include a power generation unit generating power for up / down driving of the fork unit; A guide disposed around the power generator to guide an up / down movement of the fork unit; And one end connected to the guide and the other end connected to the unit support.

The pair of guides may be arranged in a direction crossing with respect to the operation direction of the fork unit with respect to the stocker body.

The connection part, the connection plate coupled to one side wall of the unit support; And both ends may be connected to the connecting plate and the guide, and may include a connection bracket disposed in a direction crossing the operation direction of the fork unit.

The power generation unit, a motor; Ball screw disposed up and down along the up / down movement direction of the fork unit; A gear box disposed between the motor and the ball screw to transfer the rotational motion of the motor to the rotational motion of the ball screw; And coupled to the ball screw is movable in the longitudinal direction of the ball screw, one side may include a screw nut coupled to the connection bracket.

The guide may be disposed in pairs on both sides with the power generating portion therebetween.

The guide may be an LM guide.

The sensing unit may be a plurality of optical sensors, and the plurality of optical sensors may be arranged in at least a triangular sphere with the object to be transported on the stocker body.

One end may further include a sensor support bracket coupled to the optical sensor and the other end is coupled to the stocker body to support the optical sensor individually, but at least one region is bent.

The fork unit, the fork for supporting the lower end of the object to be transported; A fork arm connected with the fork to drive the fork in a direction crossing the rail; And an arm support portion rotatably supporting the fork arm with respect to the stocker body.

The fork arm may include: a first link symmetrically disposed on one side and rotatably linked to one side of the arm support; And a second link coupled to an upper side of the first link to be rotatable relative to the first link.

A rotary ball for positioning provided at an upper end of the fork to support the cassette, and at least a portion of which is rotatably inserted with respect to an insertion groove formed at the lower end of the cassette for positioning of the fork relative to the cassette. It may further include at least one cassette support unit having.

A plurality of wheels coupled to a lower portion of the stocker body; And an exterior cover partially covering the stocker body to form an exterior of the stocker body.

The exterior cover may include a plurality of unit covers that may open the wheel area, and the plurality of unit covers may be provided to correspond to the wheels one by one.

It may further include at least one buffer shock absorber coupled to one side of the stocker body.

The object to be transported may be a cassette in which a large area liquid crystal display (LCD) is mounted in the height direction.

According to the present invention, it is possible to detect the exact position of the object to be transported seated on the fork unit can prevent the phenomenon that the object to be transported is damaged during the transfer or the loading position is incorrect.

Further, according to the present invention, in applying the guide for guiding the up / down movement of the fork unit, even if the center of gravity according to the load of the cassette acts at a position separated from the center area of the stocker body, the guide may be prevented from being damaged or deformed. Can be.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, the present invention will be described in detail by explaining preferred embodiments of the present invention with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

Prior to the description of the drawings, the object to be described below is a substrate including a liquid crystal display (LCD), a plasma display panel (PDP) and organic light emitting diodes (OLED), a wafer for a semiconductor, a substrate, and the like. In addition, it can be a tray or a cassette for accommodating and supporting a wafer, as well as various logistic products including a general box, but a cassette on which an LCD substrate is loaded will be described as a transfer object.

1 is a perspective view of a stocker according to an embodiment of the present invention, FIG. 2 is a perspective view of FIG. 1, FIG. 3 is a perspective view of an operation unit of FIG. 1 with the unit cover open, and FIG. 4 is FIG. 1. 5 is an enlarged view of a portion B of FIG. 4, FIG. 6 is a plan view of FIG. 5, FIG. 7 is an enlarged view of the fork unit region, and FIG. 8 is a ball type shown in FIG. 7. 9 is a partially cutaway perspective view of the cassette support unit, and FIG. 9 is a view for explaining an operation in which the ball type cassette support unit and the cassette are combined with the frictional friction, and FIG. 10 is a view schematically showing the configuration of the pin type cassette support unit. .

As shown in these figures, the stocker of the present embodiment is disposed on the rail 110 and the stocker body 100 moving along the rail 110 and the stocker body 100 and the stocker body 100. While moving along the fork unit 330 to load the cassette on the shelf (not shown) or to take out from the shelf, the unit support portion 200 connected to the stocker body 100 to support the fork unit 330, the stocker body 100 The unit 400 is coupled to the stocker body 100 so as to be connected to the detection unit 400 and at least one side is connected to the unit support unit 200, and detects the correct position for the cassette seated on the fork unit 330) And an up / down driving unit 600 for driving the fork unit 330 up / down through 200.

The stocker body 100 is a portion on which various components are mounted, as shown in FIG. 4. The lower part of the stocker body 100 is coupled to a plurality of wheels 120 which are mounted on the rail 110 and moved along the rail 110. Four are provided one by one in the corner region of the stocker body 100 of the wheel 120, as shown in Figure 5, the wheel 120 is coupled to the wheel drive unit 130 for driving the wheel 120 individually It is supported on the stocker body 100. The wheel driver 130 may be provided by a combination of a motor and a reducer.

The scaffold member 115 is further installed inside the stocker body 100. The scaffold member 115 is a part that the worker stands on when maintaining the fork unit 330 or the like.

One side of the stocker body 100 is further provided with a plurality of shock absorbers 150. The shock absorbing shock absorber 150 is a kind of air bearing operated by pneumatic pressure, and is buffered and supported by the stopper 111 on the rail 110 as shown in FIG. 3 to cushion the shock of the stocker. Although the shock absorbing shock absorber 150 is provided only at one side of the stocker body 100, the shock absorbing shock absorber 150 may be provided at both sides of the stocker body 100.

As shown in FIGS. 1 to 4, an outer cover 140 is provided on the outside of the stocker body 100 to partially cover the stocker body 100 to form an exterior of the stocker body 100. Exterior cover 140 is coupled to the stocker body 100 serves to cover almost the entire area except the fork unit 330.

As shown in FIG. 3, the exterior cover 140 includes a unit cover 141 that can locally open the wheel 120 region. The unit cover 141 may have a structure that can be rotated with respect to the remaining area of the exterior cover 140.

When the exterior cover 140 includes the unit cover 141 having a smaller size, the wheel 120 is easily opened by a simple and simple method of opening the unit cover 141 even without lifting the entire exterior cover 140. There is an advantage that can be cleaned or maintained.

As shown in FIGS. 7 to 10, the fork unit 330 is connected to the fork 331 and the fork 331 that supports and supports the lower end of the cassette. And a fork arm 332 for driving the motor in a direction intersecting with the rail 400, and an arm support 333 for rotatably supporting the fork arm 332.

The fork arm 332 is symmetrically disposed with each other and the first link 332a having one side rotatably linked to the arm support 333 and the first link 332a so as to be relatively rotatable with respect to the first link 332a. It has a second link (332b) coupled to the upper side of. This link structure, ie, the mutually organic link structure of the first and second links 332a and 332b, moves the fork 331 toward the first and second cells 110 and 210 to handle the cassette.

At this time, the position of the cassette relative to the fork 331 should be maintained accurately when moving the cassette loaded in the fork 331. That is, when the stocker moves along the rail 400 with the cassette loaded, or when the fork unit 330 moves up and down in the height direction of the column 320, the position of the cassette with respect to the fork 331 is misaligned or Problems such as the cassette falling from the fork 331 due to the vibration that may occur during the movement should not occur. To this end, cassette support units 530 and 570 are provided in the upper four corners of the fork 331 to maintain the correct position of the cassette relative to the fork 331. In this case, although the same cassette support unit may be mounted in the four corner regions of the upper end of the fork 331, in the present embodiment, the fork 331 in the direction A of FIG. 7 toward the first and second cells 110 and 210. A pair of ball type cassette support unit 530 is provided in the front both side corner regions of the upper end, and a pair of pin type cassette support unit 570 is provided in the rear both corner regions.

9 and 10, the lower portion of the cassette is provided with four insertion grooves C1 for aligning the position between the cassette and the fork 331. These four insertion grooves C1 are provided. Two of them may be naturally aligned relative to the fork 331 as the ball type cassette support unit 530 and the other two pin type cassette support unit 570 are partially inserted. The cassette is firmly loaded onto the fork 331 while being loaded.

When the ball type cassette support unit 530 collides with the cassette bush C2 provided at the bottom of the cassette, the ball type cassette support unit 530 is freely rotated in the direction of absorbing the impact amount caused by the collision. It can prevent the occurrence of splitting.

The ball type cassette support unit 530, as shown in Figures 8 and 9, the positioning of the rotary ball 531 is rotatably inserted into the insertion groove (C1) of the cassette, the fork 331 It is coupled to the upper end and has a rotary ball body 533 is partially inserted into the rotary ball 531 for positioning.

The position setting rotary ball 531 is a part inserted into the insertion groove C1 of the cassette, which not only aligns the correct position of the cassette with respect to the fork 331, but also the cassette is separated from the fork 331. It plays a role in stopping things. In addition, the position of the insertion groove C1 and the position setting rotary ball 531 does not correspond to each other in the process of inserting the position setting rotary ball 531 into the insertion groove (C1) of the cassette adjacent to the insertion groove (C1) When a collision occurs between the cassette bush C2, which is a part, and the rotary ball 531 for positioning, the free rotation of the cassette bush C2 and the rotary ball for positioning is achieved by freely rotating the impact amount caused by the collision. By rolling friction 531, it is possible to prevent the occurrence of a split phenomenon between the cassette bush C2 and the positioning rotary ball 531.

Rotating ball body 533 is a part to which the positioning rotary ball 531 is rotatably coupled, the upper portion is formed in a hemispherical shape so that the positioning rotary ball 531 can be partially inserted and coupled The ball housing 534 and a cassette support plate 535 are provided to surround the ball housing 534 so that a portion of the positioning rotary ball 531 is exposed upward. A plurality of rolling balls 536 are disposed on the upper inner surface of the ball housing 534 so that the positioning rotary ball 531 can freely rotate. In addition, a plurality of grooves 539 are regularly formed in the recessed portion of the ball housing 534, and the cloud ball 536 is disposed in the groove 539 so as to be freely rotatable. Therefore, when an external force is applied to the position setting rotary ball 531, for example, when the position setting rotary ball 531 collides with the cassette bush C2 provided in the lower part of the cassette, the position setting rotary ball 531 ) Can freely reduce the amount of impact caused by a collision by freely rotating in a predetermined direction, and thus can prevent the occurrence of a split phenomenon.

The cassette support plate 535 contacts and supports the cassette bush C2 adjacent to the insertion groove C1 of the cassette so that the cassette can be supported on the fork 331 in a balanced manner. The cassette support plate 535 is provided to surround the ball housing 534 such that only a part of the positioning rotary ball 531 inserted into the cassette insertion groove C1 is exposed upward. To this end, a through hole 537 through which the positioning ball 531 is partially penetrated is formed in the upper central region of the cassette support plate 535. The through hole 537 not only allows the positioning rotary ball 531 to be partially exposed to the upper portion, but also the release hole for preventing the positioning rotary ball 531 from being separated to the outside by the through hole 537. Branch 538 is provided. By the structure of the ball-type cassette support unit 530, the coupling of the cassette and the fork 331 proceeds as shown in FIG.

Pin type cassette support unit 570, as schematically shown in Figure 10, the position fixing fork pin is inserted into the insertion groove (C1) formed in the lower portion (lower half of the cassette) of the cassette when loading the cassette 571 and a cassette support plate 573 which partially covers the position fixing fork pin 571 so that a portion of the position fixing fork pin 571 is exposed upward. The position fixing fork pin 571 is partially protruded to the upper portion of the cassette support plate 573, but unlike the above-described positioning rotary ball 531, the position fixing fork pin 571 is fixed to the cassette support plate 573. . Therefore, when the position fixing fork pin 571 is coupled to the insertion groove C1 of the cassette, the position of the cassette with respect to the fork 331 may be firmly maintained.

The unit support part 200 is a part which supports the fork unit 330. As shown in FIG. As will be described in detail later, the fork unit 330 is up / down driven by the up / down driving unit 600, but the up / down driving unit 600 does not directly drive the fork unit 330 up / down The fork unit 330 is driven up / down by driving the support part 200 up / down. Therefore, the unit support part 200 is connected to the fork unit 330 and the up / down drive unit 600.

The sensing unit 400 is coupled to the stocker body 100 and serves to detect the correct position for the cassette seated on the fork unit 330. If the detection unit 400 detects that the cassette is not seated in the correct position on the fork unit 330, the signal is notified to the outside in the form of a screen or a buzzer. Then, the operator can readjust the correct position with respect to the cassette, thereby preventing the phenomenon that the wrongly seated cassette falls during the transfer and may be broken or the loading position may be incorrect.

The sensing unit 400 may be applied to a vision camera or the like, but is applied as an optical sensor in this embodiment. The sensing unit 400 as an optical sensor is disposed on the stocker body 100 with a cassette interposed therebetween to detect whether the cassette is in the correct position. Of course, since the scope of the present invention does not need to be limited thereto, the sensing unit 400 as an optical sensor may be arranged in a triangular sphere with a cassette interposed on the stocker body 100.

A sensor support bracket 410 is provided to mount the sensing unit 400 on the stocker body 100. One end of the sensor support bracket 410 is coupled to the sensing unit 400 as an optical sensor and the other end is coupled to the stocker body 100 to support the sensing unit 400 as an optical sensor. In this embodiment, the sensor support bracket 410 is bent in one region so that the internal space formed by the sensing units 400 can be more widely secured. However, the present invention need not be limited to its shape.

On the other hand, the up / down drive unit 600 is coupled to the stocker body 100 so that at least one side is connected to the unit support 200, up / down the fork unit 330 through the unit support 200 (up / down) to drive. The up / down distance at this time is within several to tens of centimeters.

The up / down driving unit 600 includes a power generator 610, a guide 620 disposed around the power generator 610 to guide the up / down movement of the fork unit 330, and one end. The part is connected to the guide 620 and the other end has a connecting portion 630 connected to the unit support 200.

First, the connection part 630 will be described. The connection part 630 includes a connection plate 631 coupled to one side wall of the unit support part 200, and both ends of the connection part 631 and the movable part 620b of the guide 620. It includes a connecting bracket 632 connected to). The connection bracket 632 has a triangular shape.

The power generator 610 is a part for generating power for the up / down driving of the fork unit 330. The power generation unit 610 is between the motor 611, the ball screw 612 disposed up and down along the up / down movement direction of the fork unit 330, between the motor 611 and the ball screw 612. It is arranged is coupled to the gearbox 613 and the ball screw 612 to transfer the rotational movement of the motor 611 to the rotational movement of the ball screw 612 and is movable along the longitudinal direction of the ball screw 612 and one side And a screw nut (not shown) coupled to the connecting bracket 632.

As shown, since the arrangement direction of the motor 611 and the arrangement direction of the ball screw 612 are different from each other, a gearbox 613 is provided between the motor 611 and the ball screw 612, but the motor is provided in the ball screw 612. If the form directly connected to the 611, the gear box 613 need not be used. Accordingly, when the motor 611 is operated to rotate the ball screw 612 through the gearbox 613, the screw nut (not shown) linearly moves up and down along the length direction of the ball screw 612, and interlocked thereto. Connection bracket 632 connected to the screw nut, and the connection plate 631 connected to the connection bracket 632 moves up and down the fork unit 330 through the unit support 200 while linearly moving up and down. Will be.

The guide 620 is a part for guiding the fork unit 330 to up / down driving, and is largely divided into a fixed part 620a and a movable part 620b. The fixed part 620a is fixed to the stocker body 100, and the movable part 620b is finally connected to the unit support part 200 through a connection bracket 632 disposed in a direction intersecting the operation direction of the fork 331. Connected.

Although the rod type may be used as the guide 620, in this embodiment, an LM guide 620 having high durability and high reliability is applied to the guide role.

At this time, the LM guide 620 is disposed in pairs on both sides with the ball screw 612 of the power generator 610, in particular, the power generator 610. On the other hand, in applying a pair of LM guide 620, it may be considered to arrange a pair of LM guide 620 in a direction parallel to the direction of operation of the fork 331 with respect to the stocker body 100, In this case, when the center of gravity according to the load of the cassette is located at a position spaced apart from the central region of the stocker body 100, that is, the outer region (region C in FIG. 4) of the stocker body 100, a pair of LM guides 620. Since the concentrated load acts on the side portion of the), the LM guide 620 may be easily broken or deformed.

It is not easy to solve this problem, in the present embodiment, by switching the idea, as shown in Figures 5 and 6, a pair of directions in the direction crossing the operation direction of the fork 331 for the stocker body 100 By arranging the LM guide 620, even if the center of gravity according to the load of the diarrhea cassette is located at a position spaced apart from the central region of the stocker body 100, that is, the outer region (region C in FIG. 4) of the stocker body 100 Since the fixed part 620a and the movable part 620b of the guide 620 are in contact with each other in a large area, the L guide 620 is not easily damaged or deformed. In other words, when a pair of L guides 620 are disposed in a direction crossing the direction of operation of the fork 331 with respect to the stocker body 100 as in the present embodiment, the center of gravity according to the load of the cassette is the stocker body 100. LM because the concentrated load on the side portions of the pair of LM guides 620 can be significantly reduced compared to the prior art even if located at a position spaced apart from the central region of the stalker body 100 (C region in FIG. 4). The guide 620 is not easily broken or deformed.

The operation of the stocker having such a configuration will be briefly described as follows.

When a predetermined control signal for cassette transfer is input, the wheel 120 of the stocker is driven to move the stocker on the rail 110. When the stocker reaches the shelf at the desired position, the wheel 120 stops driving. Handling of the cassette is in progress. That is, the fork 331 is advanced in one direction by the operation of the fork arm 332, and the fork 331 is slightly down by the operation of the up / down driving unit 600, and then the lower part of the cassette After placement it is up again to support and support the cassette.

At this moment, since the fork 331 is disposed outside the stocker body 100 and the cassette is raised at the position, the center of gravity according to the load of the cassette is spaced apart from the center area of the stocker body 100. Is acted on. However, since the pair of L guides 620 for guiding the fork unit 330 up / down driving are arranged in a direction intersecting with the operation direction of the fork 331 with respect to the stocker body 100, Even if the center of gravity according to the load acts at a position spaced apart from the central area of the stocker body 100, the portion receiving the force of the pair of LM guides 620 may be uniform without biasing to one side so that the LM guide 620 is It is not easily broken or deformed.

On the other hand, when the fork 331 is retracted and moved into the stocker body 100 by the operation of the fork arm 332, the four detection unit 400 detects the seating position of the cassette, if normal The operation of transferring the cassette to another shelf and stacking is continued, and if abnormal, the operation of seating the cassette in position is preceded.

As such, according to the present exemplary embodiment, the correct position of the cassette seated on the fork unit 330 may be sensed to prevent a phenomenon in which the cassette falls during transportation and may be damaged or the loading position may be incorrect.

In addition, according to the present embodiment, the center of gravity according to the load of the cassette is spaced apart from the center of the stocker body 100 in applying the pair of L guide 620 for guiding the up / down movement of the fork unit 330 Even if it is acting in the correct position it is possible to prevent the SM guide 620 is damaged or deformed.

As described above, the present invention is not limited to the described embodiments, and various modifications and changes can be made without departing from the spirit and scope of the present invention, which will be apparent to those skilled in the art. Therefore, such modifications or variations will have to be belong to the claims of the present invention.

1 is a perspective view of a stocker according to an embodiment of the present invention.

2 is a plan view of Fig.

3 is a perspective view of the operation of Figure 1 in the unit cover open state.

4 is a partial cutaway perspective view of FIG. 1.

FIG. 5 is an enlarged view of region B of FIG. 4.

6 is a plan view of FIG. 5.

7 is an enlarged view of the fork unit area.

8 is a partially cutaway perspective view of the ball type cassette support unit shown in FIG. 7.

FIG. 9 is a view for explaining an operation in which the ball type cassette support unit and the cassette are combined with frictional friction.

10 is a view schematically showing the configuration of a pin type cassette support unit.

* Explanation of symbols for the main parts of the drawings

100: stocker body 110: rail

111: stopper 120: wheel

130: wheel drive unit 140: exterior cover

141: unit cover 150: shock absorber

200: unit support 330: fork unit

331: fork 332: fork arm

333: arm support 400: detection unit

600: up / down drive unit 610: power generating unit

620: guide 630: connection

631: connection plate 632: connection bracket

Claims (17)

A stocker body disposed on a rail and moving along the rail; A fork unit which is coupled to the stocker body and moves with the stocker body and loads or transports the object to be transferred from the shelf; A unit support part connected to the stocker body to support the fork unit; And Is connected to the stocker body, the stocker, characterized in that it comprises a detector for detecting the correct position for the object to be transported seated on the fork unit. The method of claim 1, Stalker further comprises an up / down drive unit coupled to the stocker body to at least one side is connected to the unit support portion for driving the fork unit up / down through the unit support portion. The method of claim 2, The up / down drive unit, A power generator for generating power for up / down driving of the fork unit; A guide disposed around the power generating unit to guide the up / down movement of the fork unit; And One end is connected to the guide and the other end comprises a connection portion connected to the unit support. The method of claim 3, The pair of guides is a stocker, characterized in that arranged in a direction crossing with respect to the direction of operation of the fork unit relative to the stocker body. The method of claim 4, wherein The connecting portion, A connecting plate coupled to one side wall of the unit support; And Both ends are connected to the connecting plate and the guide, the stocker, characterized in that it comprises a connection bracket which is disposed in a direction intersecting with the operation direction of the fork unit. The method of claim 5, The power generation unit, motor; Ball screw disposed up and down along the up / down movement direction of the fork unit; A gear box disposed between the motor and the ball screw to transfer the rotational motion of the motor to the rotational motion of the ball screw; And Is coupled to the ball screw is movable in the longitudinal direction of the ball screw, the stocker, characterized in that it comprises a screw nut coupled to one side of the connection bracket. The method of claim 6, The guide is a stocker, characterized in that arranged in pairs on both sides with the power generating portion therebetween. The method of claim 7, wherein The guide is a stocker, characterized in that the LM guide (LM guide). The method of claim 1, The sensing unit is a plurality of optical sensors, And said plurality of optical sensors are arranged in at least a triangular sphere with said object to be transported on said stocker body. 10. The method of claim 9, The optical sensor is coupled to one end and the other end is coupled to the stocker body to support the optical sensor individually, but at least one area of the stocker further comprises a support bracket for bending formed. The method of claim 1, The fork unit, A fork supporting and supporting a lower end of the object to be transferred; A fork arm connected with the fork to drive the fork in a direction crossing the rail; And And an arm supporter for rotatably supporting the fork arm with respect to the stocker body. The method of claim 11, The fork arm is, A first link symmetrically disposed with each other and rotatably linked to one side of the arm support; And And a second link coupled to an upper side of the first link to be rotatable relative to the first link. The method of claim 11, A rotary ball for positioning provided at an upper end of the fork to support the cassette, and at least a portion of which is rotatably inserted with respect to an insertion groove formed at the lower end of the cassette for positioning of the fork relative to the cassette. The stocker further comprises at least one cassette support unit having. The method of claim 1, A plurality of wheels coupled to a lower portion of the stocker body; And And an exterior cover partially covering the stocker body to form an exterior of the stocker body. The method of claim 14, The exterior cover includes a plurality of unit covers that can open the wheel area, The plurality of unit covers are provided to correspond to the wheel one by one, characterized in that the stocker. The method of claim 1, The stocker further comprises at least one buffer shock absorber coupled to one side of the stocker body. The method of claim 1, The object to be transported is a stocker, characterized in that a large area (Liquid Crystal Display) LCD (cassette) is mounted in the height direction.

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