JPS62230523A - Work stacking device - Google Patents

Abstract

PURPOSE:To shorten the time required for stacking, by making a claw member, supporting a work in a state of being stacked up, shiftable to a refuge position allowing the work to pass through from a work supporting position by means of contact with the work going up. CONSTITUTION:With retraction of a claw member 19, the tray 2 supported so far is superposed on another tray 2 of a lifter 18, and in keeping the state intact, this tray 2 of the lifter 18 passes through upward a supporting position of the claw member 19. A crank 28 is going to be turned to a bottom dead point through a bottom dead point whereby the lifter 18 goes down in a state of supporting the tray 2, and the tray 2 is supported in a state of being stacked on the claw member 19 restored to the supporting position, while the lifter 18 goes down as it is. When the crank 28 comes nearer to the vicinity of the bottom dead point, a rotary actuator 21 stops its rotation by operation of a bottom dead point sensor, and it is on standby till the next tray 2 is conveyed to the lifter 18 from a tray line, and after the tray 2 has been conveyed, the rotary actuator 21 reopens its rotation operation.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a work stacking device.

(Prior art) As a means for sequentially stacking a plate-like workpiece on top of the same workpiece from below, a claw member that supports the workpiece and a horizontal drive that moves the claw member toward and away from the supporting portion of the workpiece are used. It has been proposed to include means and a lid for supporting the workpiece and lifting it from below the claw member, that is, an elevating drive means.

In this case, by lifting the work while supported by the lifter, the work is stacked on top of the work supported by the upper claw member.Then, the claw member is laterally separated from the work and the work supported by the claw member is lifted. After the workpieces are supported by the lifter and further raised by the lifter, the claw member is returned to the original workpiece support position, the lifter is lowered, and the workpiece is supported by the claw member.

(Problems to be Solved by the Invention) In the case of the conventional work stacking device described above, two drive mechanisms are required for horizontally moving the claw member and raising and lowering the lid, making the construction complicated. In addition, when transferring the support of the workpiece from the claw member to the lid, it is necessary to temporarily stop the lifter and then raise it again. In addition to requiring a brake means for lifting the workpieces, the time required to stack the workpieces one time becomes longer. Further, in order to drive the claw member horizontally, a large space is required around the claw member.

(Means for Solving the Problems) As a means for solving the above problems, the present invention provides a claw member that supports workpieces in a stacked state, a lifter that supports and raises the workpieces, and a lifter that raises and lowers the workpieces. The claw member is movable from the workpiece support position to the retracted position where the workpiece is allowed to pass by contact with the rising workpiece.

In addition, the present invention provides a workpiece stacking device that is biased in the direction of returning to the workpiece support position.

(Function) In the case of the above-mentioned workpiece stacking device, when the workpiece is supported by the lifter and raised, the rising workpiece comes into contact with the claw member, and the workpiece is supported while moving the claw member from the workpiece support position to the retracted position. Pass through the position upwards. Therefore, the workpiece supported by the claw member is lifted onto the workpiece of the lid. After passing the workpiece, the claw member loses contact with the workpiece and returns to the original workpiece support position, and then descends to receive and support the workpiece stacked up from the flip-up lid.

(Effects of the Invention) Therefore, according to the present invention, by simply providing a drive means for raising and lowering the beam lid as a drive source, it is possible to stack the workpieces one by one from the bottom, and when two conventional drive means are used. There is no need for the linkage between the drive means, the control system therefor, and the brake means, which simplifies the structure and eliminates the need to temporarily stop the lifter while it is rising.

The time required to stack workpieces can be shortened,
Furthermore, a large space around the claw member is not required, and costs can be reduced.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the overall configuration of a workpiece stacking device 1 that stacks trays (plate-shaped workpieces) 2 one after another from the bottom. The tray 2 of this embodiment includes a plurality of IC packages (FP
The above-mentioned workpiece stacking device 1 is used in an IC package aging attachment/detachment system schematically shown in FIG. 2.

That is, in the above attachment/detachment system, 5 represents a plurality of ICs.
A tray line 7 carries the packages 4 on the tray 2 and conveys them, and a board line 7 carries the plurality of IC packages 4 in the sockets 3 of the aging board 8 in the opposite direction to the tray 2. In this case, the unprocessed IC package 4 is
The substrate is transferred from the tray 2 of the tray line 5 to the socket 3 of the aging substrate 8 of the substrate line 7, the lid of the socket 3 is closed, and the substrate is sent to the substrate unloading section 9 for the aging device.

The aged IC package 4 is then supplied to the board loading section 10, the lid of the socket 3 is opened on the board line 7, and the IC package 4 is transferred to the tray 2 on the tray line 5. and,
At the tray unloading section 6 of the tray line 5, the tray 2 on which the IC package 4 is placed is stacked with the above-mentioned workpieces.
The trays are stacked one by one by the A device, and in this stacked state, they are sent from the tray unloading section 6 to the next processing station (IC inspection device).

Now, to explain the work stacking device 1,
The trays 2 are stacked on top of each other between opposing tray guides 12, 12 which are erected at intervals on a support base 11. Guide tubes 14.14 of the elevating guide means 13.13 are fixed to the outer surfaces of both tray guides 12.12, and guide rods 15, 15 are fitted into these guide tubes 14, 14 so as to be able to move up and down. ing. In this case, as shown in FIG. 3, one tray guide 12 is provided with two guide rods 15.15 parallel to each other at intervals, and these two guide rods 15. and the lower ends thereof are connected by an upper bar 16 and a lower bar 17, respectively.

Lifters 18 and 18 for supporting and raising the tray 2 are fixed to the lower bar 17, and both lifters 18 and 18 are fixed to the lower bar 17.
Claw members 1 supporting 1-ray 2 at both sides of 18
9 is a support bracket 20.2 fixed to the tray guide 12;
It is rotatably supported via a pin 22 horizontal to zero. Further, a rotary actuator (driving means) 21 for raising and lowering is linked to the lower bar 17 via a link mechanism.

The lifter 18 and the claw member 19 are connected to the tray guide 1 facing each other.
2.12, respectively.

First, the lifter 18 is attached to the tray 2 as shown in FIG.
The tray guide 12 is supported from below by a supporting portion 2a extending laterally, and is elevated, and is exposed to the inside of the tray guide 12 through an opening 24 formed in the tray guide 12. Also,
The claw member 19 has a claw 19a that supports the support portion 2a of the 1-ray 2 from below, and this claw 19a is located at a workpiece support position (which protrudes into the inside of the tray guide 12 through an opening 25 formed in the tray guide 12). 4) and a retracted position (dotted line position in FIG. 4) located diagonally outside and above, which allows the tray 2 to pass from below. That is, the claw member 19 is biased in the direction of rotation to the support position by the spring 23 provided between it and the support bracket 20, and is pushed up by the contact of the tray 2 with the claw 19a from below to the retracted position. It is designed to be able to rotate. Further, the claw member 19 is held at the workpiece supporting position using the lower edge of the opening 25 as a stopper.

Next, to explain the drive system for raising and lowering, - As shown in FIGS. 1 and 3, a disk-shaped crank 28 is mounted on the rotating shaft 27 of the rotary actuator (FFI motor) 21. They are carefully connected.

The crank 28 is rotatably fitted into a connecting hole 30 at the lower end of the connecting arm 29.

The connecting arm 29 is coupled to a horizontal portion 32a of an L-shaped arm 32 that is pivotally supported on a support plate 31 raised from the support stand 11, and a vertical portion 32b of this L-shaped arm 32.
One end of a connecting rod 33 extending in the transverse direction is connected to the upper end of the connecting rod 33 . The other end of the connecting rod 33 is connected to the lifting guide means 1
Upper arms 36 are connected to a lower arm 35 fixed to the center of a support shaft 26 supported by the opposing tray guides 12. The above-mentioned lifting guide means 13 is installed at the tip of .36.
．． A roller 37 is provided which rests on the lower bar 17.17 of 13.

Further, the rotary actuator 21 includes a crank 28.
A stopping device is provided to stop the machine at the bottom dead center position. That is, the rotating plate 38 is connected to the rotating shaft 27 of the crank 28.
A cutout 38a is provided in the rotating plate 38.
is formed.

Corresponding to the position of the notch 38a when the crank 28 is at the bottom dead center, a photosensor, that is, a bottom dead center detection sensor 40, is provided to detect the bottom dead center by passing light through the notch 38a. ing. The bottom dead center detection sensor 40 is configured to output a stop signal to the rotary actuator 21 upon detection of the bottom dead center.

Therefore, in the case of the above embodiment, the tray 2
This will result in a layering of the following.

(1) As shown in FIG. 5, in a state where the tray 2 is supported by the claw member 19 and below the tray 2 is supported by the lifter 18 (in this case, the crank 28 is at the bottom dead center), it makes one rotation. When the mold actuator 21 operates, the rotation of its rotation shaft 27 causes the connecting arm 29. L-shaped arm 32, connecting rod 33. Lower arm 35. This is transmitted as an upward rotational force to the upper arm 36, 36 via the support shaft 26.

As a result, the lifters 18, 18 of the elevating guide means 13.13 supported by the upper arm 36.36 via the lower bar 17.17 rise synchronously while supporting the tray 2. In other words, the tray 2 rises while remaining horizontal.

(2) Due to this upward movement, the tray 2 of the lifter 18 comes into contact with the lower side of the claw 19a of the claw member 19, as shown in FIG. 6, and forcibly rotates the claw member 19 from the supporting position to the retracted position.

- Due to this retraction of the claw member 19, the tray 2 supported by the claw member 19 overlaps the tray 2 of the lifter 18,
In this state, the tray 2 of the lifter 18 passes upward through the support position of the claw member 19 (FIG. 1 shows the state after passing).

■ Due to this passage, the claw member 19 becomes free,
It returns to the supporting position by the bias of the spring 23.

■Next, as the crank 28 rotates from the top dead center to the bottom dead center, the lifter 18 descends while supporting the first helley 2, and the tray 2 returns to the supporting position with the claw member 19
The lifter 1 is supported in a stacked state.
8 continues to descend.

■When the crank 28 reaches near the bottom dead center, the rotary actuator 21 is activated by the bottom dead center detection sensor 40.
stops rotating and waits until the next tray 2 is conveyed from the tray line 5 to the lifter 18. After the tray 2 is conveyed, the single-rotation type actuator 21 resumes rotation operation, and from the previous step The operation will be repeated.

Therefore, in the operations of (■) to (■) above, the 4-lifter 18:
Since the tray 2 is received from the claw member 19 and the tray 2 is transferred to the claw member 19 near the top dead center of the crank 28, where the rising speed and descending speed are low, the shock given to the tray 2 when stacking this 1-lay is reduced. As the amount becomes smaller, smooth stacking operation will be performed. Further, the rotary actuator 21 stops at the bottom dead center when the descending speed of the lifter 18 becomes approximately zero, and even if the output of the stop signal to the rotary actuator 21 is slightly slow, the lifter 18 will stop at the bottom dead center. It will stop at approximately the lowest position.

Therefore, in the above embodiment, simply by raising and lowering the lifter 18, the claw member 19 reciprocates between the support position and the retracted position to stack the trays 2 on top of each other.
9 does not need to be electrically linked, and since the top dead center and bottom dead center of the crank 28 are used to control the lifting speed of the lifter 18, separate deceleration means or braking means is provided. There's no need.

Although the above embodiment relates to a device for stacking IC package trays 2, it goes without saying that the present invention can be used for stacking other trays or plate-shaped workpieces.

Further, in the above embodiment, one rotary actuator 2
1 is used to enable the lift lids 18 and 18 on both sides to be raised and lowered synchronously, however, it is also possible to use two rotary actuators to synchronize their operations so that the lift lids on both sides are driven separately. Furthermore, instead of the rotary actuator, a driving means that performs linear reciprocating motion, such as a cylinder device, may be used.

Furthermore, although a link mechanism is used in this embodiment, the movement of the actuator may be used as a direct driving source without using the link mechanism.

Further, in the above embodiment, the works (trays) are stacked one by one, but a plurality of works may be stacked one by one.

Further, in the above embodiment, the claw member 19 is biased to the supporting position by the spring 23 to ensure smooth operation, but the claw 19a side is made heavier so that the claw member 19 returns to the supporting position by its own weight. It may be biased to do so.

Further, the claw member 19 of the above embodiment moves between the support position and the retracted position by rotation, but the claw member is provided so as to be slidable in the retracting direction (horizontal direction or diagonally upward direction) away from the workpiece, and the claw member A downwardly slanted guide surface is provided on the end surface of the claw side, and the workpiece is brought into contact with the inclined guide surface from below to apply a force in the retracting direction to the claw member, thereby retracting the claw member and reducing its own weight. Alternatively, a spring may be used to return the claw member to the supporting position.

[Brief explanation of drawings]

Figure 1 is a partially sectional front view of the work stacking device;
Fig. 2 is a schematic configuration diagram of the IC package aging attachment/detachment system, and Fig. 3 is a side view of the above stacking device.
FIG. 4 is an enlarged sectional view of a part of the stacking device, and FIGS. 5 and 6 are partially omitted front views showing the operation of the claw member and the lid. ■・・・Work stacking device, 2・・・・・・1
- Ray (work), 2a...Support part, 18...
...Lifter, 19...Claw member, 19a...
... Claw, 21 ... Rotary actuator (driving means). Figure 6 and Figure 5

Claims (1)

[Claims] (1) A device that sequentially stacks plate-shaped workpieces from the bottom, including a claw member that supports the stacked workpieces;
It is equipped with a lifter that supports and raises the workpiece, and a drive means that raises and lowers the lifter, and the claw member is movable from the workpiece support position to the retreat position that allows the workpiece to pass by contact with the rising workpiece. , and is biased in the direction of returning to the workpiece support position.