JPH10232261A - Automatically inserting and stripping mechanism for burn-in board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an occupying space of an entire mechanism with large degree of freedoms of designing or using and high reliability. SOLUTION: The automatically inserting and stripping mechanism comprises an inserting side pusher 2 for pressing a rear surface of a burn-in board 1 at the time of inserting, a stripping side pusher 3 for pushing a front surface of the board 1 at the time of stripping, a drive source 56 for driving the pushers 2 and 3, a drive head 55 moving to advance or retract the board in the inserting or stripping direction by the source 56, an inserting side connecting rod 22 for coupling the pusher 2 to the head 55, and a stripping side connecting rod 32 for coupling the pusher 3 to the head 5. In this case, the rod 32 is coupled to the head 55 with a predetermined play. Since the inserting and stripping sides are independent in the mechanism, its degree of freedoms is large, and since a moving distance of the pusher 3 can be reduced corresponding to the play, the mechanism becomes compact.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burn-in apparatus for performing a screening test for removing an electronic device having an intrinsic defect or a potential defect, and more particularly to an automatic insertion of a burn-in board used in such a burn-in apparatus. It relates to a removal mechanism.

[0002]

2. Description of the Related Art In the manufacture of electronic components such as large-scale integrated circuits (LSI), a screening test called burn-in is performed in order to remove a product having an inherent defect or a potential defect from a production line. In the burn-in apparatus for performing burn-in, a large number of electronic devices to be tested are mounted on a board called a burn-in board, and the burn-in board is carried into a burn-in chamber.
The test is performed by maintaining the inside of the burn-in chamber at a predetermined high temperature and applying a predetermined voltage to each electronic device under test.

[0003] Such a burn-in apparatus is configured so that a large number of burn-in boards are collectively accommodated in a burn-in chamber, and the electronic devices under test on the large number of burn-in boards are collectively burn-in screened. A connector for applying a voltage to each electronic device under test is provided in the burn-in chamber, and a burn-in board is mounted on this connector to perform screening. Then, after the screening is completed, the burn-in board is removed from this connector.

In order to automate the mounting and removing of the burn-in board, an automatic burn-in board insertion / extraction mechanism has been developed. Fig. 5 shows the Japanese Patent Publication No. 5-62702.
5 is a schematic diagram showing a conventional burn-in board automatic insertion / extraction mechanism disclosed in Japanese Patent Application Laid-Open No. H05-205139.

The conventional automatic insertion / extraction mechanism shown in FIG. 5 includes an insertion side pusher 2 for pushing the rear end of the burn-in board 1 at the time of insertion, a removal side pusher 3 for pushing the front end of the burn-in board 1 at the time of removal, and an insertion side pusher. It is mainly composed of four connecting lots 4 for connecting the puller 2 and the extraction side pusher 3, and a drive system 5 connected to the extraction side pusher 3. In this specification, the direction in which the burn-in board 1 advances when the burn-in board 1 is inserted is referred to as “front”, and the direction in which the burn-in board 1 advances when the burn-in board 1 is removed is “back”.

As shown in FIG. 5, the drive system 5 is directly connected to the extraction side pusher 3 by a drive rod 51. The drive system 5 indirectly drives the insertion-side pusher 2 via a connecting rod 4 that connects the removal-side pusher 3 and the insertion-side pusher 2.

In this conventional mechanism, as shown in FIG. 5, the insertion side pusher 3 is pressed against the rear surface of the burn-in board 1, and the insertion side pusher 2 pushes the burn-in board 1 so that the front end of the burn-in board 1 is connected to the connector 6. Be attached. This operation is achieved by the drive system 5 pulling the insertion side pusher 2 via the connecting rod 4 and the extraction side pusher 3.

When removing the burn-in board 1 after the burn-in screening, the drive system 5 pushes the removal side pusher 3, whereby the removal side pusher 3 pushes the front end of the burn-in board 1. By this operation, the front end of the burn-in board 1 is detached from the connector 6, and
The burn-in board 1 is removed.

The drive system 5 mainly includes a drive lot 51 connected to the extraction side pusher 3, a crank mechanism 52 for moving the drive lot 51 back and forth, and a chain 53 and a motor 54 connected to the crank mechanism 52. Is configured.

Further, in the conventional mechanism shown in FIG. 5, the insertion side pusher 2 performs a predetermined angular rotation by the back and forth movement of the connecting lot 4. By this rotational movement, the insertion side pusher 2 can take a first position where the rear end of the burn-in board 1 is pressed and a second position where the burn-in board 1 can be removed.

This will be described with reference to FIG. FIG.
FIG. 6 is a schematic plan view illustrating the operation of the insertion side pusher in the mechanism shown in FIG. 5. As shown in FIG. 6, an arm 41 is connected to an end of the connecting lot 4. The arm 41 is axially fixed by a pin 42,
2 around a predetermined angle.

The distal end of the arm 41 is connected to the insertion side pusher 2. FIG. 6 shows a state where the burn-in board 1 is mounted on the connector 6. In this state, the connecting rod 4 is connected to the burn-in board 1
When the arm 41 is moved in the direction of extracting the arm, the arm 41 is pushed out, and the arm 41 rotates around the pin 42 by a predetermined angle.
As a result, the arm 41 is in the state shown by the dotted line in FIG. 6, and there is no problem in taking out the burn-in board 1. Then, the connecting rod 4 is further retracted, and the withdrawal side pusher 3 pushes the front end of the burn-in board 1 to remove the burn-in board 1 from the connector 6.

When the burn-in board 1 is inserted, the arm 41 rotates in the closing direction by the forward movement of the connecting lot 4, whereby the insertion side pusher 2 pushes the rear end of the burn-in board 1.
In this state, the connecting lot 4 further advances, and the insertion side pusher 2 pushes the rear end of the burn-in board 1,
The burn-in board 1 is mounted on the connector 6.

[0014]

As described above, in the conventional burn-in board automatic insertion / extraction mechanism, the extraction side pusher 3 and the insertion side pusher 2 are connected by the connecting rod 4, and the drive system 5 The insertion side pusher 2 and the removal side pusher 3 are simultaneously moved. That is, the movement of the insertion side pusher 2 and the movement of the removal side pusher 3 are completely linked. For this reason, the conventional mechanism has the following problems.

First, since the movement of the insertion side pusher 2 and the movement of the removal side pusher 3 are completely interlocked, there is no room for the removal operation on the removal side, and there is a problem in reliability. . That is, in the operation of the above-described conventional mechanism, the moment when the arm 41 is opened and there is no problem in taking out the burn-in board 1 and the moment when the removal side pusher 3 starts pushing the front end of the burn-in board 1 are almost simultaneously. There is no time margin between the opening / closing operation of the arm 41 and the removal operation of the removal side pusher 3. For this reason, in some cases, there is a possibility that the pull-out side pusher 3 may start pushing the burn-in board 1 in a state where the arm 41 is not completely opened, and there is a concern that excessive force may be applied to the mechanical parts such as the burn-in board 1 and the arm 41. There is.

Secondly, in the mechanism in which the insertion side pusher 2 and the extraction side pusher 3 are completely interlocked, since both are dependent on each other, the degree of freedom in design and use is small. That is, for example, when the design is changed to a mechanism with only the extraction side pusher 3 or the design is changed to a mechanism with only the insertion side pusher 2, it is difficult to change the design based on the conventional mechanism. It is necessary to redesign from part. In use, for example, it is not possible to use only the insertion side pusher 2 or only the removal side pusher 3, and both must always be used simultaneously.

Third, since the movement of the insertion side pusher 2 and the movement of the removal side pusher 3 are completely linked, the removal side pusher 3 needs to move by the same distance as the movement distance of the insertion side pusher 2. is there. The moving distance of the insertion side pusher 2 is the sum of the moving distance required for the opening and closing operation of the arm 41 and the moving distance required for the arm 41 to push the rear end of the burn-in board 1 and mount it on the connector 6. In this case, what is essentially required for the removal operation is the latter movement distance, that is, the movement distance corresponding to the amount of pushing the rear end of the arm 41 burn-in board 1 and attaching it to the connector 6. The moving distance for opening and closing the arm 41 is not originally necessary for the extraction side pusher 3. That is, in the conventional mechanism, the moving distance of the removal side pusher 3 is unnecessarily long, and there is a disadvantage that the space occupied by the entire mechanism increases.

Fourth, in the conventional mechanism, the arm 41
Are fixed by the pins 42 so as to perform only a rotational movement, so that the range in which the burn-in board 1 is set at the time of insertion is limited to a range in which the arm 41 can push the burn-in board 1 by this rotational movement. If it is set to a position farther than this, the insertion operation cannot be performed, resulting in a mounting error to the connector.

The invention of the present application has been made to solve such a problem, and has a novel structure which has a high degree of freedom in design or use and high reliability, and can reduce the space occupied by the entire mechanism. The purpose of the present invention is to provide a mechanism for automatically inserting and removing a burn-in board.

[0020]

According to a first aspect of the present invention, there is provided a burn-in board for mounting a burn-in board on a connector provided in a burn-in apparatus and removing the burn-in board from the connector. An automatic insertion / extraction mechanism, which includes an insertion side pusher that presses the rear surface of the burn-in board during insertion, a removal side pusher that presses the front side of the burn-in board during removal, a drive source that drives the insertion side pusher and the removal side pusher, and a drive. A drive head that moves forward and backward in the direction of insertion and removal of the burn-in board by a source, an insertion-side connecting rod that connects the insertion-side pusher and the drive head, and a removal-side connecting rod that connects the removal-side pusher and the drive head. , The extraction side connecting rod has a predetermined play. It has a configuration that is coupled to the drive head I. Also, in order to solve the above problems,
According to a second aspect of the present invention, in the configuration of the first aspect,
The insertion-side connecting rod is connected to an opening / closing arm that opens and closes so as to push the rear surface of the burn-in board when inserted, and allows the burn-in board to retreat when removed. The opening and closing operation is performed by the retreating movement of the rod. According to a third aspect of the present invention, in order to solve the above-mentioned problem, in the configuration of the first or second aspect, the opening / closing arm performs the opening / closing operation by a predetermined rotational movement and a predetermined forward / backward movement in the insertion / removal direction. It is configured as follows.

[0021]

Embodiments of the present invention will be described below. FIG. 1 is a schematic perspective view illustrating a configuration of an automatic insertion and removal mechanism of a burn-in board according to an embodiment of the present invention, FIGS. 2 and 3 are schematic plan views illustrating the operation of the mechanism in FIG. 1, and FIG. FIG. 3 is an exploded perspective view illustrating a configuration of an opening / closing arm.

The burn-in board automatic insertion / extraction mechanism shown in FIG. 1 includes an insertion-side pusher 2 for pushing the rear end of the burn-in board 1 at the time of insertion, and a burn-in board 1 at the time of removal.
, A drive source for driving the insertion side pusher 2 and the removal side pusher 3, a drive head 55 that moves forward and backward in the direction of insertion and removal of the burn-in board 1 by the drive source, and the insertion side pusher 2. Insertion-side connecting rod 22 for connecting to drive head 55
And a removal-side connecting rod 32 that connects the removal-side pusher 3 and the drive head 55.

In the mechanism of this embodiment, a large number of burn-in boards 1 are accommodated in a large number of carrier racks 11 and the carrier racks 11 are moved to form a large number of burn-in boards 1.
Can be inserted and removed at once. FIG.
As shown in (1), in the carrier rack 11, a large number of burn-in boards 1 are vertically arranged at predetermined intervals.

Two such carrier racks 11 are provided above and below. A rack receiving roller 12 is provided below each carrier rack 11, and each carrier rack 11 can move while sliding on the rack receiving roller 12.

The insertion-side pushers 2 are bar-shaped members which are long in the vertical direction, and are arranged at two intervals slightly smaller than the width of the burn-in board 1. Each insertion side pusher 2 is held by three opening / closing arms 21 in a horizontal posture. The three opening / closing arms 21 are provided at an upper end, a middle height, and a lower end.

The open / close arms 21 are connected to one end of the insertion-side connecting rod 22. The insertion-side connecting rod 22 is a rod-shaped member extending in the front-rear direction, and the other end is connected to the drive head 5 constituting the drive system 5.
5 is fixed. Further, the insertion-side connecting rod 22 is inserted through an insertion hole provided in the removal-side pusher 3 and an insertion hole provided in the mounting plate 57 to which the drive system 5 is attached. Further, the insertion-side connecting rod 22 is inserted through a linear guide 23 fixed to a fixing member (not shown), so that the insertion-side connecting rod 22 moves back and forth with high linearity.

The removal side pusher 3 is a rectangular frame-shaped member as shown in FIG. The removal side pusher 3 is configured to simultaneously remove a large number of burn-in boards 1 housed in the two carrier racks 11 from the connector 6 by pressing the front surface of the carrier rack 11.

One end of a withdrawing side connecting rod 32 is fixed to the withdrawal side pusher 3 as shown in FIG. The two withdrawing-side connecting rods 32 are fixed at positions closer to the center than the insertion holes of the insertion-side connecting rod 22. The removal-side connecting rod 32 extends horizontally in parallel with the insertion-side connecting rod 22, and is connected to the drive head 55. The connection between the removal-side connecting rod 32 and the drive head 55 is different from the insertion-side connecting rod 22, and is connected to the drive head 55 with a predetermined “play”. This is a major feature of the present embodiment.

More specifically, the driving head 55
Is provided with an insertion hole through which the extraction-side connecting rod 32 is inserted. Extraction side connecting rod 3
The tip of 2 protrudes from the insertion hole, and a tip-side stopper 33 is provided at the tip. Further, a rear end side stopper 34 is provided on the rear end side of the insertion hole of the extraction side connecting rod 32 with respect to the insertion hole. That is, when the drive head 55 moves back and forth,
The withdrawing side connecting rod 32 moves back and forth with "play" of the separation distance from the rear end side stopper 3 and the rear end side stopper 34.

The drive system 5 includes the drive head 55 and an air cylinder 56 as a drive source for driving the drive head 55.
It is mainly composed of The air cylinder 56 is mounted on a mounting plate 57 fixed to a beam member 50 constituting a skeleton portion of the burn-in device. Air cylinder 56
Is fixed to the center of the drive head 55, and when the air cylinder 56 is driven, the drive head 55 moves back and forth through the output shaft.

On the other hand, the connecting rod 2 on the insertion side
Opening / closing arm 21 for connecting the insertion side pusher 2 to the insertion side 2
Is adapted to open and close the insertion side pusher 2 in conjunction with the forward and backward movement of the insertion side connecting rod 22. Hereinafter, this point will be described with reference to FIGS.

As shown in FIG. 4, the open / close arm 21 is a substantially L-shaped plate-like member, and the insertion side pusher 2 is fixed to the tip. A fixing hole 20 is provided at the center of the L-shaped corner.

On the other hand, a shaft pin 23 is provided at the rear end of the insertion-side connecting rod 22. And FIG.
As shown in FIG.
, And the shaft pin 23 is fitted into the fixing hole 20.
The shaft pin 23 is rotatable in the fixing hole 20,
Therefore, the opening / closing arm 21 is rotatable by a predetermined angle around the shaft pin 23 as a central axis. The insertion-side connecting rod 22 is provided with a spring stopper 25 for stopping one end of the coil spring 24. A similar spring stopper (not shown) is also provided on the bottom surface of the opening / closing arm 21.

As shown in FIGS. 2 and 3, fixed pins 26 and 27 are provided on both sides of the opening / closing arm 21, respectively. The above-described elastic force of the coil spring 24 acts so as to rotate the opening / closing arm 21 toward the center of the burn-in board 1. A fixed pin (hereinafter referred to as an inner fixed pin) 26 provided inside the opening / closing arm 21 (from the center of the burn-in board 1) is arranged to support the opening / closing arm 21 against the elastic force of the coil spring 24. ing. A fixing pin (hereinafter referred to as an outer fixing pin) 27 provided outside the opening / closing arm 21.
Is disposed so that the L-shaped bent portion of the opening / closing arm 21 hits as described later and rotates the opening / closing arm 21 outward.

Next, the operation of the automatic burn-in board insertion / removal mechanism of the present embodiment according to the above configuration will be described. First, a case where the burn-in board 1 is mounted on a connector will be described. The opening / closing arm 21 is in a position shown by a solid line in FIG. 3 and is open outward. In this state, as shown in FIG. 1, the two-stage carrier rack 11 containing a large number of burn-in boards 1 is moved forward while sliding on rack receiving rollers 12.

When the carrier rack 11 is located at the position shown by the dotted line in FIG. 4, a signal is sent from a controller (not shown), and the air cylinder 56 is driven. When the air cylinder 56 is driven, the output shaft of the air cylinder 56 pushes the drive head 55 forward. As a result, the drive head 55 advances the insertion-side connecting rod 22.

When the insertion-side connecting rod 22 moves forward, the coil spring 2
The opening / closing arm 21 is rotated inward by the force of 4, and the posture is such that the opening / closing arm 21 is positioned on the same straight line as the insertion-side connecting rod 22 as shown by the dotted line in FIG. Further, when the insertion-side connecting rod 22 advances, the insertion-side pusher 2
Contacts the rear surface of the carrier rack 11. When the insertion-side connecting rod 22 further advances, the insertion-side pusher 2 pushes the carrier rack 11.

When the air cylinder 56 is driven at a predetermined stroke in this manner, each burn-in board 1 in the carrier rack 11 is in a state of being mounted on the connector. Thus, the insertion operation is completed.

Next, the extracting operation will be described. When the extraction operation starts, the opening / closing arm 21 is in a closed position as shown by a solid line in FIG. 2 and is in a position on the same straight line as the insertion-side connecting rod 22. In this state, the air cylinder 56 is driven, and the output shaft operates to pull the drive head 55 back.

At the beginning when the air cylinder 56 is driven,
Since there is "play", the removal-side connecting rod 32 does not move, and only the insertion-side connecting rod 22 moves backward. When the insertion-side connecting rod 22 is retracted, the insertion-side pusher 2 is separated from the rear surface of the carrier rack 11, and when the insertion-side connecting rod 22 is further retracted by a predetermined distance, the bent portion of the opening / closing arm 21 comes into contact with the outer fixing pin 27, so that the opening / closing arm 21 moves outward Rotate to open.

After the open / close arm 21 is fully opened as shown by the broken line in FIG. 3, when the drive head 55 is further retracted, the drive head 55 is moved to the rear end stopper 34 of the extraction side connecting rod 32. It will be in the state of contact. Then, when the drive head 55 further retreats, the removal side connecting rod 32 retreats, whereby the removal side pusher 3 retreats. As a result, the removal side pusher 3 pushes out the front surface of the carrier rack 11, whereby the burn-in board 1 is removed from the connector 6.

When the air cylinder 56 is driven at a predetermined stroke in the direction in which the drive head 55 is retracted, the burn-in board 1 in the carrier rack 11 is
Retreats to the position shown in FIG. 4, whereby the removal operation is completed. The transfer of the carrier rack 11 to the rack receiving roller 12 may be performed using an automatic transport mechanism, or may be performed directly by an operator.

According to the burn-in board automatic insertion / extraction mechanism of the present embodiment having the above-described configuration and operation, since there is a predetermined "play" between the extraction-side connecting rod 32 and the drive head 55, the burn-in board 1 The withdrawal side pusher 3 pushes out the carrier rack 11 with sufficient margin after the opening and closing arm 21 is retracted and opened at the time of removal. Therefore, there is no fear that the pull-out side pusher 3 starts pushing the burn-in board 1 in a state where the opening / closing arm 21 is not completely opened, and there is no fear that an excessive force is applied to the mechanical parts such as the burn-in board 1 and the opening / closing arm 21. It has a highly reliable mechanism.

Further, the insertion side pusher 2 is connected to the drive head 55 by the insertion side connecting rod 22, and the extraction side pusher 3 is connected to the extraction side connecting rod 32, and both are mechanically independent. High degree of freedom in top and use. That is, for example, design and use only for insertion or design and use only for removal can be easily performed. In the case of designing only withdrawal, the above-mentioned “play” is eliminated and the withdrawing-side connecting rod 32 is connected to the drive head 55.

Further, in the present embodiment, the moving distance of the removing side pusher 3 is shorter than the moving distance of the inserting side pusher 2 by the amount of “play” between the removing side connecting rod 32 and the driving head 55. Therefore, the mechanism on the extraction side can be made compact by that much, and the space occupied by the entire mechanism can be reduced.

Further, in the mechanism of the present embodiment, as described above, the opening / closing arm 21 performs the opening / closing operation by the linear motion and the rotational motion in the insertion / removal direction, so that the burn-in board 1 can be set at a wide position at the time of insertion. . That is, from the position on the front surface of the insertion side pusher 2 when the opening / closing arm 21 at the time of the insertion operation is closed and is in a posture along the insertion / removal direction, the opening / closing arm 21 advances forward by a predetermined distance and the insertion is completed. At any time, any position may be set between the front positions of the insertion side pusher 2 in principle.

That is, the tolerance of the set position of the burn-in board 1 is large by the amount of the linear movement of the opening / closing arm 21. For this reason, the occurrence of erroneous attachment of the connector 6 to the connector due to the displacement of the setting position of the burn-in board 1 is extremely small as compared with the related art. Due to this, even when the burn-in board 1 is set by a transfer mechanism such as a robot, the accuracy required for the transfer mechanism is low, and the merit in cost and the like is great.

In the configuration of the above-described embodiment, the burn-in board 1 is stored in a large number in the carrier rack 11 and the insertion and removal operation is performed. However, the burn-in board 1 can be inserted and removed without using the carrier rack 11. A configuration in which the side pusher 3 directly pushes out may be used. Further, a configuration may be employed in which one burn-in board 1 is inserted and withdrawn.

In the above embodiment, one drive head 55 is used. However, one drive head is connected to the insertion-side connecting rod 22, and another drive head is connected to the removal-side connecting rod 32. Thus, two drive heads may be driven by one drive source 56. Furthermore, each of the two driving heads may be driven by providing a dedicated driving source.

[0050]

As described above, according to the first aspect of the present invention, since the withdrawing-side connecting rod is connected to the drive head with a predetermined play, the withdrawal-side pusher is provided by this play. Moving distance is short, and the mechanism on the extraction side can be made compact. Further, since the insertion side pusher and the extraction side pusher are mechanically independent, the degree of freedom in design and use is high. According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, the burn-in board is extracted with sufficient margin after the opening and closing arm is opened, so that a highly reliable mechanism is provided. The effect is obtained. According to the third aspect of the invention, in addition to the effects of the first or second aspect, the opening / closing arm performs the opening / closing operation by the forward / backward movement and the rotation movement in the insertion / removal direction. There is an effect that the setting position of the board can be widened, and the occurrence of mounting errors to the connector due to the shift of the setting position of the burn-in board is extremely small.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view illustrating a configuration of an automatic insertion / extraction mechanism of a burn-in board according to an embodiment of the present invention.

FIG. 2 is a schematic plan view illustrating the operation of the mechanism in FIG. 1;

FIG. 3 is a schematic plan view illustrating the operation of the mechanism in FIG. 1;

FIG. 4 is an exploded perspective view illustrating a configuration of an opening / closing arm.

FIG. 5 is a schematic view showing a conventional automatic insertion / extraction mechanism of a burn-in board.

6 is a schematic plan view illustrating the operation of the insertion side pusher in the mechanism shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Burn-in board 11 Carrier rack 2 Insertion side pusher 21 Opening / closing arm 22 Insertion side connecting rod 3 Removal side pusher 32 Removal side connecting rod 5 Drive system 55 Drive head 56 Air cylinder 6 as a drive source 6 Connector

Claims (3)

[Claims] 1. A burn-in board automatic insertion / extraction mechanism for attaching a burn-in board to a connector provided in a burn-in device and removing the burn-in board from the connector, wherein an insertion-side pusher presses a rear surface of the burn-in board at the time of insertion. A withdrawal side pusher that pushes the front of the burn-in board during removal, a drive source that drives the insertion side pusher and the withdrawal side pusher, a drive head that moves forward and backward in the direction of insertion and removal of the burn-in board by the drive source, and an insertion side pusher It has an insertion-side connecting rod that connects the head, and a removal-side connecting rod that connects the removal-side pusher to the drive head, and the removal-side connecting rod is connected to the drive head with a predetermined play. Characterized in that the burn-in board Dynamic insertion and ejection mechanism. 2. The insertion-side connecting rod is connected to an opening / closing arm that performs an opening / closing operation to push the rear surface of the burn-in board when inserted and to allow the burn-in board to retreat when removed. 2. The burn-in board automatic insertion / extraction mechanism according to claim 1, wherein the arm is configured to perform the opening / closing operation by retreating the insertion-side connecting rod. 3. The burn-in board according to claim 1, wherein the opening / closing arm is configured to perform the opening / closing operation by a predetermined rotational movement and a predetermined forward / backward movement in the insertion / removal direction. Automatic insertion and removal mechanism.