JPH03259815A - Individual take-out device of plate workpiece - Google Patents

Abstract

PURPOSE:To enhance an improvement in efficiency by carrying a workpiece in the state leaning on the surface of an upward carrying band with its rear edge being supported by a pressing surface, advancing and retreating a sucking/ pushing means from the back surface of a carrying body to the surface, and holding the inside workpiece of superposed workpieces to push and drop the outside workpiece. CONSTITUTION:A workpiece R is carried with the rear edge being supported by a workpiece pressing surface 5 in such a manner that the workpiece leans on the receiving surface 4 of a carrying body 2. A workpiece sucking/pushing device 7 is advanced and retreated from the back surface 6 side of a carrying body 2 toward the surface 10 side. During this advance and retreatment, a workpiece sucking part 8 is operated to suck and hold the workpiece R carried by the carrying band 2. Thus, if a superposed workpiece R' is present, the workpiece R' is pushed and dropped from the carrying band as it is never sucked nor held, and only the sucked workpiece R is returned onto the carrying band 2. This constitution enhances an improvement in working efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for individually taking out plate-like workpieces, such as lead frames.

[Background of the invention] Lead frames, which are a type of plate-like work, are
As shown in the figure, there is a diode, transistor,
It has a structure in which elements a such as capacitors and resistors are molded.

This lead frame R is obtained through molding process A during the manufacturing process of electronic components shown in FIG.
After that, day flashing process B1 soldering process C
It is made into a final product after going through the trimming and forming processes.

In this manufacturing process, in the molding process A, the lead frame R is knocked out and has a random posture, so before entering the defrosting process B, the alignment process E
It is necessary to interpose the lead frames R and align them in a certain direction, but in order to ensure this alignment work, take out the lead frames R individually in advance and carry out the alignment process one by one. Is it necessary to go through the individual extraction process F to be carried into E?

This alignment process E and the prior individual removal process F are also necessary between the soldering process C and the trim/forming process.

[Prior Art] Conventionally, the individual extraction work of the lead frame R has been performed manually.

[Problem to be solved by the invention] Therefore, conventionally, there are the following problems (1) and (2).

■Manual work has low work efficiency.

■Manual work is expensive due to rising labor costs.

In order to solve these problems (1) and (2), the present applicant previously proposed an apparatus for individually taking out molded intermediate lead frames of electronic components (Japanese Patent Application No. 63-266816).

As shown in FIG. 3, a conveyance belt 2 is provided so as to be conveyable and movable along the lead frame upward conveyance path 1, and lead frames R are placed on the front side of the conveyance belt 2 at appropriate intervals in the conveyance direction.
A workpiece receiving surface 4 that receives the back surface of the workpiece and a workpiece pushing surface 5 that presses the rear edge are arranged alternately, and the workpiece pushing surface 5 is provided in the figure-7 shaped workpiece receiving groove 11. By forming the upward work sliding slope 13, the lead frame R is received in an upward rearward state across the work receiving surface 4 and the work pushing surface 5, and is overlapped with the front side of the lead frame R and transported together with it. The other lead frame R' can be slid down by its own weight.

According to this individual take-out device, it is possible to automate the individual take-out of the lead frame R and solve the above-mentioned problems (1) and (2), but the following new problem (2) arises.

■For example, if there is a burr on the mold part of lead frame R and this is hooking another lead frame R', the other lead frame R' may not slide off securely, making it difficult to take out the individual lead frames. accuracy may be reduced.

SUMMARY OF THE INVENTION The present invention aims to improve the efficiency of individual extraction work, to reduce the cost of the work, and to improve the accuracy of the work.

[Means for Solving the Problems] As shown in FIG. 1, for example, the present invention provides a conveyance belt 2 that can be conveyed and moved along an upward conveyance path 1 for a plate-shaped workpiece, and a conveyance direction on the front side of the conveyance belt 2. Workpiece receiving surfaces 4 for receiving the back surface of the plate-shaped workpiece 3 and workpiece pushing surfaces 5 for pushing the rear edge of the plate-shaped workpiece 3 are arranged alternately at appropriate intervals, and a workpiece adsorption/extrusion device is installed in the backside space 6 of the upward conveyance path 1 for the plate-shaped workpiece. 7 is provided, and the work suction part 8 of the work suction and extrusion device 7 is configured to be able to be driven forward and backward from the back side space 6 of the upward conveyance path 1 to the front side space 10 by the extrusion drive device 9 (see FIG. 2). In the advancement step of advancing from the back side space 6 to the front side space 10, the work suction unit 8 sucks the plate-shaped work 3 received across the work receiving surface 4 and the work pushing surface 5 of the conveyance belt 2, and then advances further. At the same time, in the reverse retraction process, the sucked plate-like workpiece 3 is moved between the workpiece receiving surface 4 and the workpiece pushing surface 5.
It is designed so that it can be left behind.

The conveyance belt 2 may be a belt as shown in FIG. 1, or may be a belt.

The plate-shaped work R may be a lead frame as shown in FIG. 4, or may be another plate-shaped object.

The workpiece pressing surface 5 may be formed on the surface of a claw 20 as shown in FIG. 1, or may be formed on the surface of a plate.

As shown in FIG. 1, the work suction/pushing device 7 may move the work suction section 8 forward and backward by the swinging motion of a swinging arm 23, or move the work suction section 8 forward and backward by the telescoping action of a telescoping arm. It may also be one that moves forward and backward.

As shown in FIG.
The transport belt 2 may be moved forward and backward by passing through the insertion opening 26 provided in the transport belt 2, or may be moved forward and backward by passing through both sides of the conveyance belt 2.

The suction means in the workpiece suction section 8 may be an air suction system as shown in FIG. 1, or a magnetic suction system.

[effect] The present invention provides the following effects (1) to (2).

■The individual removal work of plate-shaped workpieces can be automated.
Work efficiency is higher than manual work.

■The individual removal work of plate-shaped workpieces can be automated.
The work cost can be reduced compared to manual work.

■In the advancing process, the plate-shaped workpiece, which is received between the workpiece receiving surface and the workpiece pushing surface of the conveyance belt, is advanced to the front side space while being sucked by the work suction part, and other plate-shaped workpieces that overlap on the front side are moved. It is ensured that it falls off, and during the retraction process, the adsorbed plate-like work is left in its original state, so even if another plate-like work is caught on the - It is possible to reliably remove the shaped workpieces and reliably take out only the negative plate-like works one by one, thereby increasing the accuracy of the individual pick-up work.

(2) The work suction and extrusion device can be implemented with a relatively simple structure because it only needs to have an advancing/retracting part and a suction part.

[Example] Embodiments of the present invention will be described based on the drawings.

1 and 2 are diagrams for explaining an individual take-out device for plate-like workpieces according to an embodiment of the present invention, FIG. 1 is a side view of the individual take-out device, and FIG. 2 is a lead incorporating the individual take-out device. FIG. 3 is a side view of the frame take-out and alignment device.

In FIG. 2, reference numeral 14 indicates a lead frame R take-out and alignment device.

This take-out and alignment device 14 sends the lead frames R, which are placed in a hopper 15 in a random posture, to an individual take-out device 17 using a work supply conveyance belt 16, and takes them out one by one by the individual take-out device 17. Alignment device 18
The sheets are carried in, aligned in a fixed direction by an alignment device 18, and then carried out from a carry-out device 19.

As shown in FIG. 1, the individual take-out device 17 is composed of a conveyance device I2 and a work suction and push-out device 7.

The conveyance device 12 is provided with a conveyance belt 2 that can be conveyed and moved along the upward conveyance path 1 of the plate-like workpiece, and has a workpiece receiving surface 4 that receives the back surface of the lead frame R and a workpiece receiving surface 4 that is placed on the front side of the conveyance belt 2 at appropriate intervals in the conveyance direction. By alternately arranging the workpiece pushing surfaces 5 that press the rear end edge, the lead frame R received across the workpiece receiving surface 4 and the workpiece pushing surface 5 can be conveyed upward by the movement of the conveyance belt 2.

The workpiece pressing surface 5 has claws 20 attached to the surface of the conveyance belt 2.
7-shaped workpiece receiving groove formed on the conveyance side of the workpiece receiving groove] 1, and by forming a workpiece sliding slope 13 with one rear top on the front side of the workpiece pushing surface 5, the workpiece receiving surface 4 and the workpiece pushing surface are It is possible to receive the lead frame R with its rear facing up across the surface 5, and to slide off another lead frame R' that overlaps the front side of the lead frame R and is about to be conveyed together with it by its own weight. That's how it is.

The work suction/extrusion device 7 is provided in the back side space 6 of the upward conveyance path 1 for the plate-like workpiece, and pushes out the work suction section 8 from the back side space 6 of the upward conveyance path 1 for the plate-like workpiece using a driving device 9 (see FIG. 2). The work suction unit 8 is configured to be able to be driven forward and backward into the front space 10, and the work suction unit 8 is moved from the back space 6 to the front space 10.
In the advancing step, the lead frame R received across the workpiece receiving surface 4 and the workpiece pressing surface 5 of the conveyor belt 2 is adsorbed, and then the lead frame R is further advanced, and in the reverse retracting step, the adsorbed lead Frame R to workpiece receiving surface 4
and the workpiece pressing surface 5.

That is, during the advance process, the lead frame R, which is received across the workpiece receiving surface 4 and workpiece pushing surface 5 of the conveyance belt 2, is sucked by the workpiece suction section 8 while being sucked into the surface space 10.
and another lead frame R' that overlaps with the front side.
During the retraction process, the adsorbed lead frame R is left in its original state, and the other lead frame R' is caught in the workpiece adsorption and extrusion device 7 due to catching on the molding part. Even if the workpiece does not slide down on the near side, the workpiece suction and extrusion device 7
By removing this lead frame, only the negative lead frames can be reliably taken out one by one, thereby increasing the accuracy of the individual take-out work.

The structure of the work adsorption/extrusion device 7 will be explained in more detail.

This workpiece suction and extrusion device 7 has a workpiece suction part 8 at the tip of a swing arm 23, an intake nozzle 24 at the tip of the workpiece suction part 8, a photosensor 25 for extrusion timing at the lower part of the workpiece suction part 8, and conveys the workpiece. An insertion opening 26 is opened between adjacent claws 20 of the band 2 through which the tip of the workpiece adsorption section 8 enters and exits, the conveyance band 2 is interlocked and connected to a conveyance drive device (not shown), and the swing arm 23 is driven to push out. The transport drive device and the extrusion drive device 9 are connected to the device 9 (see FIG. 2), and are configured in conjunction with the photosensor 25.

That is, based on the photo sensor 25 detecting that the lead frame R has moved to the front side of the work adsorption/extrusion device 7, the conveyance drive device is stopped for a predetermined period of time to bring the conveyance band 2 into a stopped state, and the lead frame R is is held stationary in front of the work suction and extrusion device 7, and at the same time, the extrusion drive device 9 is operated normally to swing the swinging arm 23 forward, and the work suction section 8 is advanced from the back side space 6 to the front side space 10, and is moved to a predetermined position. After a period of time has elapsed, the extrusion drive device 9 is operated in reverse to swing the swing arm 23 to the rear side, the work suction unit 8 is moved from the front side space 10 to the back side space 6, and then the conveyance drive device is restarted. and re-link the conveyor belt 2.
The configuration is such that similar operations are performed continuously thereafter.

The intake nozzle 24 communicates with an intake device (not shown) via an intake passage 33 formed within the work suction section 8 .

As shown in FIG. 2, the alignment device 18 receives the lead frames R that are brought in one by one from the individual takeout device 17 at the standby gate 27, and then transports them into the detection device 28. 28, the orientation and number of lead frames R are detected, and if it is detected that a plurality of lead frames R-R' are carried in and teed regardless of the individual take-out operation by the individual take-out device 17, duplicate workpieces are removed. A plurality of lead frames R-
R' is removed outside the process 30, and when it is detected that the number of lead frames R is one, the duplicate work removal device 29 is ostensibly directed toward the device 31, and the lead frame R is sent there. After the lead frame R is turned face up in the device 31, the front side is carried into the device 32, and the front side is carried into the device 32.
After the lead frame R is turned forward, the carry-out device 19 carries out the lead frame R with the front facing forward.

[Brief explanation of drawings]

1 and 2 are diagrams for explaining an individual take-out device for the R-2 frame according to an embodiment of the present invention. FIG. 1 is a side view of the individual take-out device, and FIG. 2 is a side view of the individual take-out device. FIG. 3 is a view corresponding to FIG. 1 of the previously proposed example, and FIG. 4 is a diagram illustrating the lead frame used in the present invention, and FIG. Front view of the frame, Figure 4 (B) is the 4th
FIG. 5 is a sectional view taken along the line BB in FIG. 1... Upward conveyance path for the plate-shaped workpiece, 2... Conveyance belt,
R... Plate-shaped work (lead frame), 4... Work receiving surface, 5... Work pressing surface, 6... Back side space of 1,
7... Work adsorption/extrusion device, 8... Work adsorption section, 9... Extrusion drive device, 10... Front side space of 1.

Claims (1)

[Scope of Claims] 1. A conveyance band 2 is provided so as to be movable along the upward conveyance path 1 of the plate-like workpiece, and workpieces that receive the back side of the plate-like workpiece R are placed on the front side of the conveyance band 2 at appropriate intervals in the conveyance direction. A receiving surface 4 and a workpiece pushing surface 5 that presses the rear end edge are arranged alternately, and a workpiece suction/pushing device 7 is provided in the back space 6 of the upward conveyance path 1 of the plate-shaped workpiece, and a workpiece suction section 8 of the workpiece suction/pushing device 7 is provided. The drive device 9 pushes out the plate-like workpiece into the back side space 6 of the upward conveyance path 1.
The work suction part 8 is configured to be able to be driven forward and backward from the back space 6 to the front space 10, and in the advancement process of advancing from the back space 6 to the front space 10, the work suction part 8 is received across the work receiving surface 4 and the work pushing surface 5 of the conveyance belt 2. After adsorbing the plate-shaped workpiece R, the plate-shaped workpiece R is moved forward, and in the reverse retraction process, the sucked plate-shaped workpiece R is transferred to the workpiece receiving surface 4 and the workpiece pushing surface 5.
A device for individually picking up plate-shaped workpieces, characterized in that the device is configured to leave the workpieces at the same place.