JP3307189B2 - Automatic transfer method of burn-in board by automatic guided vehicle and burn-in test system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a trackless AGV.
The present invention relates to an automatic transfer method of a burn-in board by an automatic guided vehicle and a burn-in test system, which automatically transfers a burn-in board between a (automated guided vehicle) and a burn-in test device.

[0002]

2. Description of the Related Art A burn-in test system to which a conventional burn-in board automatic transfer method using an AGV is applied will be described with reference to FIGS. 12 to 15A and 15B.

First, a first conventional example will be described with reference to FIG. 12 and FIGS. 13 (a) and 13 (b). FIG. 12 is a plan view of the first conventional example, FIG. 13A is a side view thereof, and FIG. 13B is a front view thereof. FIG. 12 and FIG.
As shown in FIGS. 3A and 13B, in the first conventional example, a tracked AGV having a mechanical guide 78 is provided.
Use 71. The AGV 71 includes a driving conveyor 72
And a mechanism 73 for moving the drive conveyor 72 back and forth (Y direction in the figure), and a mechanism 74 for moving the carrier rack 3 holding the burn-in board 4 up and down. On the other hand, the burn-in test apparatus 1 has a positioning guide 75 for absorbing a stop error in the direction of travel of the AGV 71 (X direction in the figure).
And the connector insertion / extraction mechanisms 76, 76 of the burn-in board 4.
a, 76b and a drive conveyor 77.

In such a configuration, when supplying the burn-in board 4 from the AGV 71 to the burn-in test apparatus 1, the AGV 71 first stops at the supply position.
Next, after raising the carrier rack 3, the AGV 71 advances the driving conveyor 72 to drive the driving conveyor 72 to rotate forward. At this time, since the drive conveyor 77 is normally driven by the burn-in test device 1 in the same direction as the drive conveyor 72, the carrier rack 3 is supplied and transferred into the device 1. The burn-in board 4 in the carrier rack 3 is pulled into the inner side of the apparatus 1 by the connector insertion / extraction mechanism 76a on the apparatus 1 side, and a connector fitting operation is performed. After the connector fitting operation is completed, the AGV 71 retracts the drive conveyor 72, and then lowers it to return to the original position.

On the contrary, the burn-in test apparatus 1
When the burn-in board 4 is to be collected at 71, the device 1
Pulls out the connector while pushing out the burn-in board 4 by means of the connector insertion / extraction mechanism 76b.
1 stops at the collection position and raises the drive conveyor 72 before moving it forward. Next, after the apparatus 1 and the AGV 71 drive the drive conveyors 72 and 77 in reverse, respectively, and collect and transfer the carrier rack 3 to the AGV 71, the AGV 7
1 retracts the drive conveyor 72 and then lowers it to its original position.

Next, a second conventional example will be described with reference to FIGS. 14, 15 (a) and 15 (b). FIG. 14 is a plan view of a second conventional example, FIG. 15A is a side view thereof, and FIG. 15B is a front view thereof. FIG. 14 and FIG.
As shown in FIGS. 5A and 15B, in the second conventional example, a tracked AGV having a mechanical guide 88 is provided.
Use 81. The AGV 81 includes a hook pin mechanism 82 for driving a hook pin forward / reversely by a motor or an air cylinder, a mechanism 83 for moving the hook pin mechanism 82 back and forth (Y direction in the drawing), and a carrier rack. 3 is provided with a mechanism 84 for moving up and down. On the other hand, in the burn-in test apparatus 1, the traveling direction of the AGV 81 (X direction in the figure)
And a connector insertion / extraction mechanism 86, 86a, 8 of the burn-in board 4.
6b, and a free roller 87.

In such a configuration, when supplying the burn-in board 4 from the AGV 81 to the burn-in test apparatus 1, first, the AGV 81 stops at the supply position.
Next, after the AGV 81 raises the carrier rack 3, the hook pin mechanism 82 is moved forward by the mechanism 83, and the hook pin mechanism 82 is driven to rotate forward. As a result, the carrier rack 3 is supplied and transferred onto the free roller 87 in the apparatus. The burn-in board 4 in the carrier rack 3 is pulled into the back side of the device 1 by the connector insertion / extraction mechanism 86a of the device 1, and a connector fitting operation is performed. After the connector fitting operation is completed, the AGV 81 retracts the hooking pin mechanism 82 and then lowers it to return to the original position.

On the contrary, the burn-in test apparatus 1
If the burn-in board 4 is to be recovered to the
Pulls out the connector while pushing out the burn-in board 4 by the connector insertion / extraction mechanism 86b,
1 stops at the collection position, raises the hooking pin mechanism 82, and then advances it. Next, the AGV 81 reverses the hook pin mechanism 82 to collect and transfer the carrier rack 3 to the AGV 81, and then retreats and lowers the hook pin mechanism 82 to return to the original position.

[0009]

However, the automatic transfer method of the burn-in board or the burn-in test system by the automatic guided vehicle according to the conventional example described above has the following disadvantages. For example, in the first and second conventional examples, it is assumed that an AGV having extremely high stopping accuracy is used. If the stop accuracy of the AGV is not sufficiently high, the carrier rack may be caught at the time of transfer, causing a problem that the transfer is not successful or the transfer by an unattended person is not achieved. In particular, if the positional deviation (transfer level deviation) in the height direction (Z direction in the figure) is large, the carrier rack 3 is caught by any part of the burn-in test apparatus 1,
Transfer fails.

Further, as apparent from the figure, one burn-in test apparatus 1 has four transfer positions. In addition, since a plurality of burn-in test apparatuses 1 are usually installed, the number of transfer locations, that is, the number of locations for alignment in the height direction increases. In addition, since it is also affected by external conditions such as the inclination of the floor, it is difficult to keep the displacement within a predetermined narrow tolerance range over all of these many transfer locations when a conventional trackless AGV is used. Extremely difficult.

Therefore, in the first and second conventional examples, the tracked AGVs 71 and 81 are used to increase the stopping accuracy. However, in order to use a tracked AGV, it is necessary to lay a track (rails, etc.) for the AGV in a factory, and there is a disadvantage that large-scale and high-cost construction is required. Also, the track requires a large installation area, which may be a factor in reducing the productivity of the factory. Furthermore, once the track is laid, it is extremely difficult to change the layout.

Incidentally, in the second conventional example (see FIGS. 14 and 15 (a) and 15 (b)), the stopping accuracy in the height direction is the same as that of the first conventional example (FIGS. 12 and 13).
(A), see FIG. 13 (b)). However, it is necessary to provide the holes 89 in the carrier rack 3. The hole 89 is a dedicated hole that fits into a hook pin of the hook pin mechanism 82. Usually, since a large number of carrier racks are prepared, if the holes 89 are provided in all the carrier racks, it will be troublesome and costly.

The present invention has been made in view of the above-mentioned circumstances, and is low cost and space saving.
It is an object of the present invention to provide a method for automatically transferring a burn-in board using an automatic guided vehicle, which can easily change the path of an AGV, and which can perform automatic transfer with high accuracy, and a burn-in test system.

[0014]

In order to solve the above-mentioned problems, a method according to the present invention uses a trackless unmanned carrier for transporting a carrier rack holding a burn-in board. Automatic transfer of a burn-in board by an unmanned transport vehicle, wherein the unmanned transport vehicle supplies the carrier rack to the storage location or collects the carrier rack from the storage location and places the carrier rack at a fixed position of the unmanned transport vehicle. On the vehicle side, a moving mechanism for mounting the carrier rack and moving the carrier rack is provided, and the traveling direction of the intruding object from above around the fixed position is changed by the weight of the intruding object to the fixed position side. A second correcting means for changing the traveling direction of an intruding object from above around the storage location by the weight of the intruding object on the burn-in test device side. Providing a correction means for changing to Tokoro side,
When supplying the carrier rack to the storage location,
The automatic guided vehicle on which the carrier rack is mounted is stopped in the vicinity of the storage location, the carrier rack is positioned above the storage location by the moving mechanism of the automatic guided vehicle, and the carrier rack is lowered by the moving mechanism. Then, when the carrier rack is stored in the storage location, the moving mechanism is stored in the automatic guided vehicle, and the carrier rack is collected from the storage location,
Stopping the automatic guided vehicle near the storage location, positioning the carrier rack above the fixed position of the automatic guided vehicle by the moving mechanism of the automatic guided vehicle, and lowering the carrier rack by the moving mechanism. It is characterized in that it is placed at the fixed position.

Further, the system according to the present invention supplies the carrier rack to a storage location of a burn-in test apparatus by using an unmanned guided vehicle that transports a carrier rack holding a burn-in board, and supplies the carrier rack to the carrier rack. What is claimed is: 1. A burn-in test system for recovering from a storage location and placing the carrier rack at a fixed position on the automatic guided vehicle, wherein the automatic guided vehicle side mounts the carrier rack, and moves up and down and horizontally moves the carrier rack. A second correction means provided around the home position and having a specific surface for changing the traveling direction of the intruding object to the home position side by the weight of the intruding object when the intruding object from above comes into contact with the intruding object; The burn-in test device is provided around the storage location, and when an intruding object comes in contact with the intruding object from above, the burn-in test device The traveling direction is characterized in that it comprises a first correcting means for changing to the storage location side.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 and 2 (a),
FIG. 2B is a plan view, a side view, and a plan view, respectively, showing the configuration of a burn-in test system according to an embodiment of the present invention.
In these figures, reference numeral 1 denotes a burn-in test device installed in a plurality of factories in a factory, 9 denotes a magnetic tape attached to a floor in the factory, and 2 denotes a trackless AGV (unmanned) running according to the magnetic tape 9. , And travels in the X direction in the figure.

In the AGV 2, 3 is a carrier rack,
4 is a burn-in board held on the carrier rack 3,
6a is a fork on which the carrier rack 3 is placed, 6 is a front-rear mechanism having the fork 6a, and moves the carrier rack 3 back and forth by extending and retracting the fork 6a in the Y direction in the figure by a motor and a chain. 5 is a lifting mechanism for raising and lowering the front-rear mechanism 6 by a motor and a ball screw;
X corrects the displacement of the collected carrier rack 3 with respect to the fork 6a (corresponding to the stop accuracy error of the AGV 2).
This is a Y positioning guide (second correction means) which corrects deviations in the X direction and the Y direction by contacting the carrier rack 3 which is being lowered. The elevating mechanism 5 and the front-back mechanism 6 constitute a moving mechanism.

FIGS. 3 and 4 are a plan view and a front view, respectively, showing a schematic configuration of the burn-in test apparatus 1 in the present system. The apparatus 1 having the configuration shown in FIG. It is designed so that the rack 3 can be stored. 1 for each storage location
Reference numeral 1 denotes a positioning guide (first correction means) for absorbing the stop accuracy error of the AGV 2, and is attached to the four corners of the bottom surface such that one side surface substantially matches the bottom surface of the storage location.

FIG. 16 is a perspective view showing the structure of the above-described positioning guide 11 and the above-described XY positioning guide 7. As shown in this figure, the positioning guide 11 is formed in a substantially triangular prism shape and faces each other. The positioning guide 11 is installed so that a specific slope is oriented, and the distance between the opposing positioning guides 11 is set to be slightly longer than the length of the carrier rack 3 in the X direction.

The XY positioning guide 7 has two substantially triangular prism-shaped members provided on a plate in the same manner as the positioning guide 11, and the specific slopes of both members are oriented in the X and Y directions, respectively. ing. The two XY positioning guides 7 are arranged so that the distance between them is slightly longer than the diagonal line on the bottom surface of the carrier rack 3.
The minimum rectangle defined by the three triangular members is set to be slightly longer than the bottom surface of the carrier rack 3 both vertically and horizontally. The angle between the specific surface of each of the triangular members and the horizontal plane is set to an angle at which the carrier rack 3 slides down by its own weight when a part of the carrier rack 3 abuts.

Referring again to FIG. 3 and FIG.
2a and 12b are burn-in board insertion / extraction mechanisms, and 14 is X
The automatic door slides in the direction, and the gap between the insertion / extraction mechanism 12a and the automatic door 14, and the gap L between the automatic door 14 and the AGV2.
2, the transfer distance L1 between the device 1 and the AGV 2
Is set long. In the above-mentioned insertion / extraction mechanism, when supplying the burn-in board, the insertion / extraction mechanism 12a closes inward and pushes the carrier rack 3 toward the connector, thereby fitting the burn-in board to the connector. When the burn-in board is collected, the insertion / extraction mechanism 12a opens outward to open the passage of the carrier rack 3, and the insertion / extraction mechanism 1a is opened.
2b removes the burn-in board from the connector by pushing out the burn-in board (see Japanese Patent Publication Nos. 5-62702 and 5-62704). The insertion / extraction mechanism is not limited to the above-described configuration.

The operation when the burn-in board 4 is supplied from the AGV 2 to the storage location at the upper left of FIG.
In this case, the AGV 2 on which only one carrier rack 3 holding at least one burn-in board 4 is placed,
It is guided by the magnetic tape 9 attached to the floor, detects the left supply position station 9b, and stops. The left supply position station 9b is a station indicating that "when stopped at this position, there is a supply or collection destination of the carrier rack 3 on the left side in the traveling direction".

In this case, in order to improve the stop position accuracy, in the present embodiment, a reflection plate 8a is mounted on the burn-in test apparatus 1 side, and a reflection type photoelectric switch 8b is mounted on the AGV 2 side. It stops by using detection together. As a result, the stop position accuracy of the AGV 2 is suppressed to a level that does not interfere with the subsequent processing.

The stopped AGV 2 is shown in FIGS.
(A), X direction, Y direction, α direction (direction around Z axis), θ1 direction (direction around Y axis), θ in FIG.
There is a stop position accuracy error in two directions (direction around the X axis). The errors in the θ1 direction and the θ2 direction occur based on the inclination of the floor in the factory.

Next, in the state where the error has occurred, A
The GV 2 moves the carrier rack 3 to the height L by the lifting mechanism 5.
5 to the height obtained by adding the supply clearance L6. The height L5 and the supply clearance L6 are shown in FIG.
As shown in the front view of (a), the height from the floor and the distance longer than the permissible range of the error in the Z direction respectively mean the carrier rack 3 by taking the supply clearance L6 into account. It is possible to prevent the positioning guide 11 from being caught.

Next, as shown in FIG. 1, the AGV 2 extends the fork by the fork reach (fork length) L3 by the front-rear mechanism 6, and moves the carrier rack 3 to a predetermined storage location in the burn-in test apparatus 1. Sending in
The lifting mechanism 5 raises the fork 6a to a height L11 (FIG. 7).
(See (b)). As a result, as shown in FIG. 5 and FIG.
From the position 3b-3 which is shifted by the distance L7 in the direction, it descends while being guided by a specific surface of the positioning guide 11, and is placed at the fixed position 3a-3 on the free roller 15. In addition,
The free rollers 15 support the carrier rack 3 movably in the Y direction, and are provided on the bottom surface of each storage location. Next, the AGV 2 retracts the fork 6 a by the front-rear mechanism 6 and stores it in the AGV 2.

On the other hand, in the burn-in test apparatus 1, the carrier rack 3 placed on the free roller 15 is shifted by a distance L8 in the Y direction by the insertion / extraction mechanism 12a at a position 3b.
-4 is pulled in by a distance L10 (position 3a-4), and further pulled in by a distance L9 (position 3c-4) to engage the connector of the burn-in board 4 (see FIG. 6). Here, the position 3a-4 is a fixed position in the Y direction, and the position 3c-
Reference numeral 4 denotes a connector fitting position. Thus, the supply of the carrier rack 3 is completed, and the burn-in test is performed.

Next, an operation in the case where the carrier rack 3 having at least one burn-in board 4 on which an IC for which a burn-in test has been completed is mounted is collected from the storage location at the upper left in FIG. explain. In this case, the burn-in test apparatus 1 releases the connector from the insertion by the insertion / extraction mechanism 12b (see FIG. 3), and the carrier rack 3 holding the burn-in board 4
To the position 3a-4 (see FIG. 6).

On the other hand, the AGV 2 is guided by the magnetic tape 9 affixed to the floor in the factory and proceeds, and stops upon detecting the left collecting position station 9b. The left collection position station 9b is a station indicating that "when stopped at this position, there is a supply or collection destination of the carrier rack 3 on the left side in the traveling direction". The stopping of the AGV 2 is performed based on the magnetic detection and the optical detection as in the case described above.

The AGV 2 stopped in this way is, as in the case described above, the X direction, the Y direction, the α direction, the θ 1 direction, the θ 2 direction.
Has a stop accuracy error in the direction. Next, in the state where the error has occurred, the AGV 2 raises the fork 6a to the height L11 by the lifting mechanism 5 (see FIG. 7B). Then, the fork 6a is extended by the fork reach L3 to a position separated from the bottom surface of the carrier rack 3 by L12 by the front-rear mechanism 6.

Next, the AGV 2 raises the fork 6a to the height of the sum of the height L5 and the allowable clearance L6 by the lifting mechanism 5. Thus, the carrier rack 3 placed at the position 3a-5 on the free roller 15 is lifted and placed on the fork 6a. And AG
V2 moves the fork 6a backward by the front-rear mechanism 6, and as shown in FIGS.
Return to GV2. At this point, the carrier rack 3 is in a state represented by the position 3b-6, that is, a state in which the X direction and the Y direction are shifted due to the stop accuracy error of the AGV 2.

Next, when the AGV 2 lowers the fork 6a to the original position by the raising / lowering mechanism 5, the carrier rack 3 is lowered from the position 3b-6 while being guided by the XY positioning guide 7, and is shown in FIGS. 10 and 11. Like, X
It is placed at the fixed position 3a-7 on the Y positioning guide 7.
Thus, the collection of the carrier rack 3 into the AGV 2 is completed.

The clearance L in the present system
For 13, L10, L6, and L12, the maximum deviation amount in each of the X, Y, and Z directions, that is, the stop accuracy error, may be obtained and set to a value larger than that. In calculating the maximum deviation, AG
The stopping accuracy of the V2 is set in the X and Y directions, and the α direction is set in the X and Y directions when the fork 6a is extended by the fork reach L3.
The directions are divided into the X and Z directions when the fork 6a is extended by the fork reach L3, and the θ2 directions are divided into the Y and Z directions when the fork 6a is extended by the fork reach L3. Further, the stopping accuracy of the lifting mechanism 5 and the deflection amount L4 of the fork body when the fork 6a is extended by the fork reach L3.
Is the Z direction, and the sum of all these for each direction is the maximum deviation amount. Below, an example of dimensions of each part of the burn-in test system according to the above embodiment is shown. L3 = 1
000mm, L13 = 40mm, L10 = 40mm, L
6 = 25 mm, L12 = 25 mm, L1 = 300 mm.

The positioning of each point of the elevating mechanism 5 and the front / rear mechanism 6 is performed by arranging sensors such as proximity switches, photoelectric switches, and limit switches at fixed points, attaching dogs to the movable side, and using sensor signals. Although a method of stopping the motor is generally used, the method is not limited to these methods. Further, the elevating mechanism 5 and the front and rear mechanism 6 are not limited to the motor and the ball screw, the motor and the chain system, respectively, but may be applied to an air cylinder and a guide. Further, it is needless to say that the present system can be applied to the case where the transfer distance L1 between the device 1 and the AGV 2 is short, or the case where one burn-in test device is provided with only vertical or horizontal storage locations. No.

Further, in one embodiment described above,
In order to use the mechanism for moving the carrier rack forward and backward, it is necessary to reduce the length of the conveyor or hooking pin forward and backward mechanism and its actuator, which is required in the conventional system because the transfer distance between the burn-in test device and the AGV is long. it can. Therefore, the overall cost can be reduced.

In addition, since the carrier rack is picked up by a fork, and the carrier rack is moved and mounted, a reliable transfer is possible even if the displacement in the Z-axis direction is large. There is also an advantage that a conventional type can be used without requiring any special drilling on the carrier rack. Therefore, the processing cost of the carrier rack can be reduced.

[0037]

As described above, according to the present invention,
When supplying the carrier rack to the storage location of the burn-in test apparatus, the unmanned guided vehicle on which the carrier rack is mounted is stopped near the storage location, and the carrier rack is moved by the unmanned guided vehicle to the storage location. The carrier rack is moved down by the moving mechanism and placed on the storage location by the moving mechanism, and the moving mechanism is stored in the automatic guided vehicle. When collecting the carrier rack from the storage location, the automatic guided vehicle is stopped near the storage location, and the carrier rack is moved above the fixed position of the automatic guided vehicle by the moving mechanism of the automatic guided vehicle. , And the carrier rack is lowered by the moving mechanism to be placed at the home position. At this time, the fork is moved A in the X direction and the Y direction.
The carrier rack placed at a position shifted by the GV stop precision error is lowered while being absorbed by the XY positioning guide at the fixed position within the AGV. These operations are performed.

Therefore, when the carrier rack is lowered at the time of supply and at the time of recovery, the displacement of the carrier rack due to the stop accuracy error of the automatic guided vehicle is corrected. Therefore, it is possible to use a trackless automatic guided vehicle in which a stop accuracy error occurs, and it is possible to realize reliable transfer without using a tracked automatic guided vehicle which causes an increase in cost. That is, the overall cost can be reduced.

Further, since a trackless automatic guided vehicle can be used, there is no need to provide a mechanical guide which occupies the space, and space saving in the factory can be promoted. Of course, it is only necessary to change the layout in the factory by re-attaching a magnetic tape or the like, which is much easier than using a tracked track.

[Brief description of the drawings]

FIG. 1 is a plan view showing a schematic configuration of a burn-in test system according to an embodiment of the present invention.

FIG. 2 is a diagram showing a schematic configuration of the system, and FIG.
Is a side view, and (b) is a front view.

FIG. 3 is a plan view showing a schematic configuration of a burn-in test apparatus 1 in the same system.

FIG. 4 is a front view showing a schematic configuration of a burn-in test device 1 in the system.

FIG. 5 is a plan view for explaining a supply operation of the system.

FIG. 6 is a plan view for explaining supply and recovery operations of the system.

FIGS. 7A and 7B are front views for explaining supply and recovery operations of the system.

FIG. 8 is a plan view for explaining a collecting operation of the system.

FIG. 9 is a front view for explaining a collection operation of the system.

FIG. 10 is a plan view for explaining a collecting operation of the system.

FIG. 11 is a front view for explaining a collecting operation of the system.

FIG. 12 is a plan view showing a configuration of a burn-in test system of a first conventional example (driving conveyor system).

FIG. 13 is a front view and a side view showing the configuration of the system.

FIG. 14 is a plan view showing a configuration of a burn-in test system of a second conventional example (hook pin system).

FIG. 15 is a front view and a side view showing the configuration of the system.

FIG. 16 is a perspective view showing the structure of a positioning guide 11 and an XY positioning guide 7 provided in a burn-in test system according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Burn-in test apparatus 2 AGV 3 Carrier rack 4 Burn-in board 5 Elevating mechanism 6 Front-back mechanism 7 XY positioning guide 8a Reflector 8b Reflective photoelectric switch 9 Magnetic tape 11 Positioning guide 12 Insertion / extraction mechanism 13 Connector 14 Automatic door 15 Free roller

Claims (3)

(57) [Claims] 1. An unmanned guided vehicle that transports a carrier rack that holds a burn-in board, retrieves the carrier rack from a storage location of the burn-in test device, and mounts the carrier rack at a fixed position on the automated guided vehicle. An automatic transfer method of a burn-in board by an automatic guided vehicle, wherein a moving mechanism for mounting the carrier rack and moving the carrier rack is provided on the automatic guided vehicle side,
A second correction unit is provided around the fixed position to change a traveling direction of an intruding object from above to the fixed position side by the weight of the intruding object, and when collecting the carrier rack from the storage location, Stopping the automatic guided vehicle near the storage location, positioning the carrier rack above the fixed position of the automatic guided vehicle by the moving mechanism of the automatic guided vehicle, and lowering the carrier rack by the moving mechanism. An automatic transfer method of a burn-in board by an automatic guided vehicle, wherein the method is to place the burn-in board at the fixed position. 2. An unmanned guided vehicle that transports a carrier rack holding a burn-in board, supplies the carrier rack to a storage location of a burn-in test device, and collects the carrier rack from the storage location. What is claimed is: 1. A method of automatically transferring a burn-in board by an automatic guided vehicle mounted on a fixed position of the automatic guided vehicle, wherein a moving mechanism for mounting the carrier rack and moving the carrier rack on the automatic guided vehicle side. And second correction means for changing the traveling direction of the intruding object from above around the home position to the home position by the weight of the invading object. Correcting means for changing the traveling direction of the intruding object from above toward the storage location by the weight of the intruding object around the location, and When supplying to the location,
The automatic guided vehicle on which the carrier rack is mounted is stopped in the vicinity of the storage location, the carrier rack is positioned above the storage location by the moving mechanism of the automatic guided vehicle, and the carrier rack is lowered by the moving mechanism. The carrier rack is stored in the automatic guided vehicle, and the moving mechanism is stored in the automatic guided vehicle. When the carrier rack is collected from the storage location, the automatic guided vehicle is stopped near the storage location, The carrier rack is positioned above the fixed position of the automatic guided vehicle by the moving mechanism of the automatic guided vehicle, and the carrier rack is lowered by the moving mechanism and is mounted on the fixed position. Automatic transfer method of burn-in board by car. 3. An unmanned guided vehicle that transports a carrier rack holding a burn-in board, supplies the carrier rack to a storage location of a burn-in test apparatus, and collects the carrier rack from the storage location. A burn-in test system to be mounted at a fixed position of the automatic guided vehicle, wherein the automatic guided vehicle side is a moving mechanism for mounting the carrier rack, moving the carrier rack up and down, and horizontally moving;
A second correcting means provided around the fixed position and having a specific surface for changing the traveling direction of the intruding object to the fixed position side by the weight of the intruding object when the intruding object comes in contact with the intruding object from above. The burn-in test device is provided around the storage location, and a first correction unit that changes the traveling direction of the approached product toward the storage location side by its own weight when an incoming product from above comes in contact with the first location. A burn-in test system comprising: