JPH0517882Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is designed to place a number of lead frames in fixed positions on a loading frame before encapsulating semiconductor devices, etc. in resin during the manufacture of semiconductor devices, etc. It concerns an auto frame loader for automatic alignment.

[Conventional technology]

Various types of auto frame loaders have been proposed in the past (for example, Japanese Patent Application Laid-Open No. 173838/1983)
No., Japanese Patent Publication No. 59-72733).

[The problem that the idea aims to solve]

However, conventional auto frame loaders are relatively large and have complicated mechanisms, requiring a large installation space.

SUMMARY OF THE INVENTION An object of the present invention is to provide an auto frame loader that has a compact configuration and can efficiently load lead frames.

[Means to solve the problem]

This invention includes a turntable with a function of rotating 180 degrees for mounting multiple magazines in two rows,
Move laterally to pick up the magazine, raise and lower it to a fixed pitch at the original position, and then
a magazine grip with a function of rotating the magazine; a pusher mechanism that pushes out one lead frame onto the chuck stage from the magazine gripped in the magazine grip; The above-mentioned problems were solved by configuring a three-axis robot equipped with a chuck for chucking the lead frames, and a heater bed for mounting a loading frame for aligning the lead frames.

[Effect]

Place magazines in two rows in reverse directions on the turntable. The magazines are carried sideways by means of magazine grips, one after the other, and are raised or lowered one pitch at a fixed position. Each time the magazine moves horizontally by one row and moves up and down by one pitch, the pusher operates to push out one lead frame in the magazine from above or below. The extruded lead frame is chucked by a chuck of a three-axis robot on a chuck stage, transported to a fixed position on a loading frame, and set there. Then, when a predetermined number (four in the figure) of lead frames are set on the left half of the loading frame,
The magazine grip rotates 180 degrees and then repeats the above operation. Alternatively, the magazine grip rotates 180 degrees each time one lead frame is pushed out.
Furthermore, the chuck of the three-axis robot may move in the X-axis direction and set the lead frame alternately on the left and right sides of the loading frame. When all the magazines in the first row are empty by repeating any of the above operations, the turntable will
Rotate 180 degrees. The above operation is then repeated again.

〔Example〕

A preferred embodiment of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a frame, which has an upper surface 2 and a lower surface 3. A turntable 4 is installed on the lower surface 3, which rotates 180 degrees counterclockwise or intermittently rotates 180 degrees in the same direction. turntable 4
is driven by a motor 5 disposed within the pedestal 1. A bucket 6 stores a plurality of magazines 7 (usually 3 or 4), and two of the magazines 7 are placed symmetrically on the turntable 4 by mechanical means such as a robot or by hand. Reference numeral 8 denotes a pusher mechanism, in which a motor 9 rotates a pinion, and a pusher 1 fixed to a rack meshes with the pinion.
Advance or retreat 0. The pusher 10 may be moved forward and backward using an air cylinder. A magazine grip 11 has the function of picking up the magazine 7 in the bucket bag 6 and rotating it 180 degrees. For example, as shown in FIG. 3, the magazine 7 has a V-shaped hook 12 formed on its top surface, and that portion is connected to a gripper 13 that is driven to open and close by an air cylinder built into the magazine grip 11. It is preferable to twist the grip so that it can be gripped. The magazine grip 11 further includes a stepping motor, and is moved up and down along the Z-axis 14 by the action of the stepping motor. 15 is a rotary actuator installed on the magazine grip 11, which rotates the magazine grip 11 in the opposite direction by 180 degrees. A pair of shutter cylinders 16, 16 and a pair of rotary solenoids 17, 17 are installed on both sides of the magazine grip 11. The shutter cylinders 16, 16 are used to move the shutters 18, 18 outward so as not to get in the way when the magazine grip 11 descends to grip the magazine, and to come out of the bucket belt 6. It is something. The shutters 18, 18 are installed to prevent the lead frame 19 from jumping out from the magazine 7, and when the pusher 10 is operated, it opens left and right by the action of the rotary solenoids 17, 17. Reference numeral 25 denotes a Z-axis traverse for moving the magazine grip 11 in the transverse direction of the frame (Y-axis direction), and a screw shaft 26 is rotated by a motor. screw shaft 26
is passed in the Y-axis direction, and magazine grip 1 is
It is screwed into the lead nut of 1. Therefore,
As the screw shaft 26 rotates, the magazine grip 11 moves in the Y-axis direction. Reference numeral 28 denotes a chuck stage installed on the upper surface 2, on which the lead frame 19 pushed out from the magazine 7 is placed by an action described later. 29
is an X-axis robot, which moves a Y-axis robot 30 placed above it in the X-axis direction. A chuck 31 is installed at the tip of the Y-axis robot 30. The chuck 31 includes a claw 32 for chucking the lead frame 19, and a lifting cylinder 33.
It is driven up and down by a Z-axis robot. An air cylinder for opening and closing the claw 32 is built into the chuck 31. 34 is a heater bed arranged on the upper surface 2, and a loading frame 35 with a handle is placed on top of the heater bed.

In the above configuration, when two bucket carts 6 containing a predetermined number of magazines 7 are placed on the turntable 4 in opposite directions, the magazine grip 11 moves in the Y-axis direction by the action of the Z-axis traverse 25.
It stops on the magazine 7 to be picked up. There, the magazine grip 11 is lowered along the Z-axis 14 under the action of a built-in stepping motor. At this time, the grippers 13, 13 are open, but at the lower end, they are closed by the action of the air cylinder and grip the hook 12 of the magazine 7. Thereafter, the magazine grip 11 rises along the Z-axis 14, and the magazine 7 is pulled out from the bucket cart 6. At the same time, the shutters 18, 18 are closed by the action of the shutter cylinders 16, 16, and the opening surface of the magazine 7 is closed. The magazine grip 11 is raised until the topmost lead frame 19 in the magazine 7 is at the height of the pusher 10, and
Thereafter, it increases by one pitch, that is, by the distance between the lead frames in the magazine 7. Or, initially the bottom lead frame is pusher 1.
It may be possible to raise the pitch until it reaches a height of 0, and then lower it by 1 pitch. When the magazine 7 rises to the normal position, the rotary solenoid 17,1
The shutters 18, 18 open left and right due to the action of 7.
The pusher mechanism 8 then operates. That is, the pusher 10 enters the magazine 7 and pushes the lead frame 19 onto the chuck stage 28.
On the chuck stage 28 is an X-axis robot 29.
The chuck 31 is on standby due to the action of the Y-axis robot 30, but when the lead frame 19 is supplied, the lifting cylinder 33 operates and the chuck 31
lowers, the claw 32 closes, and the lead frame 19
Check and rise again. Then, by the action of the X-axis robot 29 and the Y-axis robot 30, the lead frame 19 is brought to a fixed position on the loading frame 35, and after being released there, it rises again and is loaded with a chuck to chuck the next stage lead frame. It arrives on the pick stage 28. Repeat the above action,
Once the lead frame 19 is set at all locations on the loading frame 35, the operation is temporarily stopped. Then, the loading frame 35 is replaced, the engine is started again, and the above operation is repeated.
In addition, the lead frame 19 in one magazine 7
When all are pushed out, the magazine grip 11
moves and returns the empty magazine 7 to its original position in the bucket 6, and then picks up the adjacent magazine 7 in the same manner as described above. When all the magazines 7 in one bucket 6 are emptied, the motor 5 is activated to rotate the turntable 4 180 degrees.
In this way, the rear-row magazine filled with lead frames 19 and the empty front-row magazine are immediately replaced. Then, the loading work of the lead frame is performed automatically and continuously by the same operation as above. Empty magazines should be replaced with buckets in a timely manner.

[Effect of idea]

The present invention is as described above, and has the advantage that the device can be configured compactly and lead frame loading work can be carried out efficiently in a small space.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a diagram showing an example of the configuration of a magazine used in the present invention. Explanation of symbols, 4...Turntable, 7...Magazine, 8...Pusher mechanism, 11...Magazine grip, 28...Chuck stage, 29...
...X-axis robot, 30...Y-axis robot, 31...
...Chick, 34... Heater bed, 35...
loading frame.

Claims (1)

[Scope of utility model registration request] A turntable with a function of rotating 180 degrees to place two rows of multiple magazines, and a function of moving laterally to pick up the magazines, raising and lowering them to a fixed pitch in the original position, and rotating 180 degrees. a pusher mechanism for pushing one lead frame onto the chuck stage from the magazine gripped by the magazine grip; This auto frame loader consists of a 3-axis robot equipped with a chuck for chucking lead frames, and a heater bed on which a loading frame is placed to align lead frames.