JPH0339925B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a buffer device, and particularly to a buffer device that is installed between automatic machines and stores and delivers flat workpieces such as semiconductor lead frames to be processed. Regarding.

[Conventional technology]

In a line made up of a plurality of automatic machines installed for each process, if one of the automatic machines before or after the line malfunctions, the entire line must be stopped. Needless to say, this greatly reduces the efficiency of the entire work line.

Therefore, conventionally, a buffer device has been installed between each automatic machine, and if a failure occurs in the automatic machine in the subsequent process, the work in the previous process can be continued, the workpiece is temporarily stored in the buffer device, and then the previous process can be carried out again. When an automatic machine breaks down, it has been done to prevent a drop in line efficiency by removing the workpiece from the buffer device and continuing work in the subsequent process.

However, the conventional buffer device has a structure in which a storage buffer device for storing the workpiece and a delivery buffer device for delivering the workpiece are simply arranged side by side.

[Problem that the invention seeks to solve]

Conventionally, the storage buffer device and the delivery buffer device were simply installed side by side, which resulted in problems such as an increase in the size of the device and an increase in equipment cost.

SUMMARY OF THE INVENTION An object of the present invention is to provide a buffer device that can perform both work storage and delivery functions with an extremely simple structure.

[Means for solving problems]

The structure of the present invention for solving the above-mentioned problems of the prior art will be explained with reference to FIGS. 1 to 4 corresponding to embodiments. a main body 1; a table 2 supported by the main body 1 and capable of mounting a stacking magazine for storing flat workpieces and moving up and down in predetermined pitches; a belt conveyor 10 provided along a route for feeding the workpieces into a stacking magazine;
A guide rail 36 provided parallel to the running path of this belt conveyor 0, and a slider 37 provided rotatably and reciprocably on this guide rail 36.
and a pusher 39 supported by an arm 40 provided on the slider 37, and the rotation range of the slider 37 is regulated in order to move and place the pusher 39 on the track or to move it out of the track of the belt conveyor 10. a cam lever 33 that is swingable in the direction of the guide rail 36 and connected to the slider 37, an eccentric cam 30 that swings the cam lever 33, the belt conveyor 10, and the eccentric cam. 30.

[Effect]

When the buffer device is used as a buffer for storing workpieces that have been worked on by an automatic machine in a previous process, the pusher 39, together with the arm 40 and slider 37, is rotated and evacuated from a predetermined position along the running path of the belt conveyor 10. After that, the motor 22
When started, the belt conveyor 10 starts circulating. As a result, when the semiconductor lead frame that has finished its work from the automatic machine in the previous process is sent out to the delivery path, the belt conveyor 1 receives it.
0, carry it out, and feed it into a stacking magazine on table 2. Thereafter, the table 2 is raised or lowered by a predetermined pitch to sequentially position the heat absorption position of the workpieces in the stacking magazine, and thereafter this operation is repeated to store a certain number of semiconductor lead frames in the stacking magazine.

When the buffer device is used as a buffer for supplying a workpiece to an automatic machine in a subsequent process, the pusher 39, together with the arm 40 and slider 37, is rotated and placed at a predetermined position along the running path of the belt conveyor 10. After that, when the motor 22 is started, the cam lever 33 is moved by the rotation of the eccentric cam 30.
swings and slides the slider 37, whereby the pusher 39 pushes out one of the semiconductor lead frames stored in the stacking magazine and advances it onto a conveyor provided on the loading side of the automatic machine for the subsequent process. Complete the send operation. Thereafter, the table 2 is raised or lowered by a predetermined one pitch to sequentially position the work storage positions of the stacking magazine, and thereafter this operation is repeated to send out the semiconductor lead frame from the stacking magazine.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. Reference numeral 1 denotes a main body having a box-like structure, in which the direction shown by arrow A in FIG. 1 is the feeding direction for storing the semiconductor lead frame, and the direction shown by arrow B is the feeding direction. A table 2 is provided slightly from the center of the main body 1 on the delivery side. table 2
It is possible to place two stacking magazines 50 (see FIG. 4) having a well-known structure in which semiconductor lead frames are stacked and stored in parallel in the feeding and feeding directions. Reference numeral 3 denotes a support stand supported by the main body 1 so as to be slidable along the direction in which the stacked magazines are lined up.A vertical guide rod 5 fixed to the table 2 is supported by a ball guide 4 provided on the support stand 3, and a well-known feeding mechanism is used. Therefore, the table 2 can be raised and lowered at a predetermined pitch, and can also be moved in the direction in which the stacked magazines are lined up.

The feeding side of the main body 1 is provided with a feeding mechanism necessary for the buffer device. 10
1 is a belt conveyor consisting of a pair of round belts installed along the feeding path of the semiconductor lead frame, and includes a pair of first support shafts 11 rotatably supported by the main body 1 and a pair of first support shafts 11 rotatably supported by the main body 1. 2 support shaft 1
It is interposed between pulleys 13 and 14 respectively fixed to 2. Then, this first support shaft 1
1 is equipped with a pulley 15 on one side and a pulley 16 on the other side, and round belts 20 and 21 are interposed between pulleys 18 and 19 fixed to a third support shaft 17 that is similarly rotatably supported on the main body 1. ing. Here, the reduction ratio between pulleys 15 and 18 and the reduction ratio between pulleys 16 and 19 are set to be equal, and the pair of belt conveyors 10 mutually rotate at a constant speed. The third support shaft 17 is a motor 2 provided in the main body 1.
Pulley 23 fixed to output shaft motor 22a of No. 2
and the round belt 2 interposed between the pulley 18 and the pulley 18.
4. The first support shaft 11, the second support shaft 12, and the third support shaft 17 are supported by support plates 25, which are disposed opposite to each other and constitute a part of the main body 1.
26 so as to be rotatable.

Further, an eccentric cam 30 is fixed to one end of the third support shaft 17, and a command cam 31 for detecting a one-rotation signal is provided at the center of the eccentric cam 30.
A detection switch 32 is fixed to the main body opposite to. 33 is a cam lever that is swingably supported by the main body 1 and has a cam floor 34 in contact with the eccentric cam 30;
It is biased toward the side that presses. 36 is a round bar-shaped guide rail provided parallel to the running path of the belt conveyor 10, 37 is fitted into the guide rail 36,
This is a rider that is rotatable around the cam lever and slidable in the axial direction of the cam lever 33, and engages with a bearing 38 provided at the tip of the cam lever 33. 39 is a pusher supported by an arm 40 extending from the slider 37 and disposed along the running path of the belt conveyor 10, and 41 is a proximity sensor for confirming feeding of the lead frame.

Further, as shown in FIG. 3, when the pusher 39 is moved and arranged on the running path of the conveyor 10, the arm 40 comes into contact with the upper surface 26a of the support plate 26, and the rotation of the rider 37 is restricted, and the pusher 39 is moved. When the conveyor device 10 is moved out of the running path, a member 42 fixed to the arm 40 comes into contact with a stopper 43 to restrict rotation of the slider 37.

Next, the operation of the buffer device having such a configuration will be explained. When using the buffer device as a buffer to store workpieces that have been completed by automatic machines in the previous process, first place two empty stacking magazines in parallel on table 2, and then move table 2 in the parallel direction. Move and feed one of the stacked magazines and set it to the delivery position. By rotating the pusher 39 together with the arm 40 and slider 37, the pusher 39 is retracted from a predetermined position along the running path of the belt conveyor 10 to a position where it abuts against the stopper 43 shown in phantom lines in FIG. Thereafter, when the motor 22 is started, the belt conveyor 10 starts rotating. Belt conveyor 10
is placed continuously on the delivery path from the automatic machine in the previous process, so when the semiconductor lead frame that has finished work is sent out to the delivery path, it is placed on the belt conveyor 10 and carried out. , and feed it into the stacked magazine on table 2. When the proximity sensor 41 confirms that the lead frame has been fed, the motor 22 is temporarily stopped by a signal from the detection switch 32, and the table 2 is raised or lowered by a predetermined pitch to the work storage position of the stacking magazine. are positioned one after another, and this operation is repeated thereafter. In this way, a certain number of semiconductor lead frames are stored in the stacked magazine.

Next, a case will be explained in which the buffer device is used as a buffer for supplying a workpiece to an automatic machine in a subsequent process. First, the stacked magazines 50 containing semiconductor lead frames are placed on the table 2.
The magazines are placed in parallel, the table 2 is moved in the parallel direction, one of the stacked magazines is sent in, and it is set at the delivery position. Then, the pusher 39 is rotated together with the arm 40 and the slider 37, and the arm 40 is brought into contact with the upper surface 26a of the support plate 26, and placed at a predetermined position along the running path of the belt conveyor 10. After that, when the motor 22 is started, The cam lever 33 swings due to the rotation of the eccentric cam 30, and the slider 3
7 is slid, whereby the pusher 39 pushes out one of the semiconductor lead frames stored in the stacking magazine and advances it onto a conveyor provided on the carry-in side of the automatic machine for the subsequent process to complete the sending operation. When one rotation of the third support shaft 17 is confirmed by the signal from the detection switch 32, the motor 22 stops for a moment, and the table 2 moves up or down by a predetermined pitch to locate the workpiece storage position in the stacking magazine. Positioning is performed sequentially and this operation is repeated thereafter. In this way, semiconductor lead frames are sent out from the stacked magazine.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the functions of storing and delivering a workpiece can be achieved with an extremely simple structure.

[Brief explanation of the drawing]

The drawings show an embodiment of the buffer device according to the present invention, in which FIG. 1 is a front view, FIG. 2 is a top view, FIG. 3 is a left sectional view, and FIG. 4 is a right sectional view. 1...Main body, 2...Table, 10...Belt conveyor, 22...Motor, 30...Eccentric cam,
37...Slider, 39...Putshiya, 40...
arm.

Claims (1)

[Claims] 1 a main body, a table supported by the main body on which a stacking magazine for storing flat workpieces is placed and which can be raised and lowered in predetermined pitches; A conveyor device provided along the route for feeding the workpiece, a guide rail provided parallel to the running path of the conveyor device, a slider provided on the guide rail so as to be rotatable and reciprocatable, and a slider provided on the slider. a pusher supported by an arm mounted on the conveyor; a regulating member that restricts the rotation range of the slider in order to move and arrange the pusher on a running track or to move the pusher out of the running track of the conveyor device;
A cam lever that is swingable in the direction of the guide rail and connected to the slider, an eccentric cam that swings the cam lever, and a motor that drives the conveyor device and the eccentric cam. Batshua device.