JPH0547803A - Pickup device for lead frame - Google Patents

Abstract

PURPOSE:To provide a pickup device of lead frames enabling operation for lead frames having diversified shapes without exchanging the pickup section. CONSTITUTION:In a pickup device for lead frames, in which stacked lead frames 40 are picked up and transferred one by one, a guide rail 10, which is formed in a long-sized tabular shape and to an underside of which a slide guide 14 is mounted, a pair of holding sections 34 fitted to the slide guide 14 of the guide rail 10 and slidably supported along the guide rail 10 and a driving section 15 for mutually contacting or leaving the holding sections 34 are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a lead frame pickup device for carrying.

[0002]

2. Description of the Related Art A lead frame pickup device is
It is used when picking up lead frames housed in a magazine one by one and supplying them to a lead forming device. In a conventional lead frame pickup device, a sandwiching portion is configured by two plate-shaped fingers that rotate around two axes with a constant interval.
When the lead frames stacked in a magazine or the like are taken out one by one and conveyed to the feed plate, each finger is rotated around the axis and the lead frame is sandwiched between the fingers and lifted and conveyed. ..

[0003]

Recently, various types of lead frames have been provided, and the tendency to produce a small amount of many types of products has been strengthened. Therefore, the processing line is often changed. Therefore, there is a demand for a lead frame pickup device that can handle different types of lead frames without replacement. However, the above-mentioned conventional lead frame pickup device has the following problems. In the conventional pickup device, since the interval between the pivot axes of the two fingers that sandwich the lead frame from both sides is constant, if the lot size changes and the width size of the lead frame changes, each of the fingers will not move when the lead frame contacts the lead frame. The opening angle of the finger around the axis changes, and if the opening angle becomes too wide, it slips, and the finger cannot hold the lead frame.If the opening angle becomes too narrow, the fingers hold multiple lead frames at the same time. Each time the lot changes, the pick-up device including the fingers needs to be replaced according to the width size of each lead frame, and the work of changing the processing line becomes complicated. It was The present invention has been made in view of the above problems, and an object of the present invention is to provide a lead frame pickup device capable of performing work on lead frames of various shapes without changing the pickup portion. Is to provide.

[0004]

The present invention has the following constitution in order to achieve the above object. That is, in a lead frame pickup device that picks up and transfers stacked lead frames one by one, a guide rail that is formed in a long plate shape and has a slide guide provided on the lower surface thereof, and a slide of the guide rail. Mates with the guide,
It is characterized by comprising a pair of holding portions slidably supported along the guide rails, and a driving portion for moving the holding portions toward and away from each other.

[0005]

When the lead frames are separated and transferred one by one from the magazine in which the lead frames are stacked, the driving unit is operated to move the sandwiching unit supported by the guide rails toward both ends of the guide rails. Slide to open the clamping part. Next, the pickup device is moved to the pickup position on the magazine in which the lead frames are stacked with the holding portion open. The drive unit is operated again, and this time, the sandwiching unit supported by the guide rail is slid toward the center of the guide rail, and is closed until the sandwiching unit abuts the lead frame. After that, the drive unit is stopped and the operation of the holding unit is suppressed, so that the lead frame is held by the holding unit and can be picked up.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings. First, the first embodiment will be described. FIG. 1 is a front view showing the overall structure of a lead frame pickup device according to a first embodiment of the present invention. Figure 2
FIG. 2 is a bottom view of FIG. 1. First, the configuration will be described with reference to FIGS. Reference numeral 10 denotes a guide rail, which is provided so as to project from the first component member 12 formed in a long plate shape and the lower surface of the first component member 12 along the central axis in the longitudinal direction of the first component member 12. Second component member 1 as slide guide
It consists of 4 and. Reference numeral 15 is a driving unit, which is composed of a driving source 16, a suppressing unit 18, and a connecting unit 20, and will be described in detail below. The drive source 16 is supported by a first support base 22 at one end of an upper surface of the guide rail 10 along the central axis, and has a motor 24 attached thereto and a first pulley fixed to an output shaft of the motor 24. 26 and. Deterrent part 1
Reference numeral 8 denotes a brake 30 supported by a second support base 28 at the other end of the upper surface of the guide rail 10 along the central axis.
And the first pulley 2 fixed to the rotating shaft of the brake 30.
6 and a second pulley 32 having the same radius. The connecting portion 20 is a timing belt, and the first pulley 26
And the second pulley 32 are connected.

Reference numeral 34 designates a pair of holding portions, which are fitted to the slide guide 14 on the lower surface of the guide rail 10 and are slidably supported by two arms 36, and downward from each arm 36 toward the outside. The fingers 38 are provided so as to extend. A part of each arm 36 has a plate shape extending vertically upward, penetrates the guide rail 10, and is connected to parallel parts of the timing belt 20 which face each other. Since the hole through which each arm 36 penetrates the guide rail 10 is formed as an elongated hole along the timing belt 20, the arm 36 can reciprocate in the left-right direction as the timing belt 20 moves. There is.

Next, the operation will be described. Motor 24
Is energized and the motor 24 rotates in the direction of arrow A, the first pulley 26 rotates in the same direction, and the first pulley 26
The two parallel portions of the timing belt 20 divided by the second pulley 32 move toward the center of the guide rail 10. Therefore, the holding portion 34 connected to the two parallel portions of the timing belt 20 has the guide rail 10
Along, the finger 38 closes for translation in the central direction of the guide rail 10. Next, the motor 24 turns to the arrow A.
When the belt is rotated in the opposite direction, the timing belt 20 moves in the opposite direction to the above, so that the sandwiching portion 34 slides along the guide rail 10 and moves in parallel to both ends of the guide rail 10, so that the finger 38 opens.

By operating the motor 24 as described above, the fingers 38 can be opened and closed, and the lead frame 40 can be sandwiched between the fingers 38. Further brake 30
And the motor 24 is stopped at the same time as the operation of the timing belt 20 through the second pulley 32.
Therefore, the lead frame 40 sandwiched by the fingers 38 can be sandwiched. Further, since the fingers 38 are formed so as to spread downward, only one lead frame 40 can be held between the lead frames 40 even when the lead frames 40 are stacked.

Next, a second embodiment will be described. FIG. 3 is a front view showing the overall structure of a lead frame pickup device according to a second embodiment of the present invention. FIG. 4 is a side view of FIG. First, the configuration will be described with reference to FIGS. Reference numeral 50 denotes a guide rail, which is provided so as to project from the first component member 52 formed in a long plate shape and the lower surface of the first component member 52 along the central axis in the longitudinal direction of the first component member 52. And a second component 54 as a slide guide. Reference numeral 55 denotes a driving unit, which is composed of a driving source 56, a suppressing unit 58, and a connecting unit 60, and will be described in detail below.
The drive source 56 is a motor, and is provided on the upper surface of the guide rail 50 and at the center of the central axis. Motor 5
The output shaft 6 is provided so as to project at both ends of the motor 56, and one end thereof penetrates the guide rail 50 and is connected to a link mechanism as a connecting portion 60 provided below the guide rail 50. There is. The other end of the motor 56 is connected to a brake as a restraint portion 58 mounted on the upper surface of the motor 56. When the brake 58 is operated, the output shaft is held and the movement of the motor 56 is restrained. It

Reference numeral 62 denotes a pair of sandwiching portions, which are fitted to the slide guide 54 on the lower surface of the guide rail 50, and have two arms 64 slidably supported and project downward from the lower surface of each arm 64. Provided, one end is arm 6
4 A plate-shaped finger 66 pivotally supported inside
And the fingers 66 project downward from the lower surface of the arm 64.
The protruding portion of the arm 64 provided on the outer side of the roller includes a protruding roller 68 rotatably attached. The spring 70 is provided in the arm 64, the inner surface of which is loosely inserted into a threaded hole, and is further loaded with a screw 72. One end of the spring 70 is in contact with the finger 66 inside the arm 64, and urges the finger 66 to the stopper 74 by its elastic force. Therefore, the tips of the fingers 66 are normally oriented almost downward.

The link mechanism 60 connects the output shaft of the motor 56 and the two arms 64 to convert the rotational movement of the motor 56 into the linear movement of the arm 64. A lead frame 76 is stacked and stored in the magazine 78. The magazine 78 is a laminated lead frame 7
The lead frame 76 is pushed upward so that the uppermost portion of 6 is always at the same height. Also magazine 78
As shown in FIG. 4, a notch 80 having a width slightly wider than the width of the finger 66 is provided at the upper end of each of the opposite wall surfaces. Further, the horizontal distance between the outer wall surface of the magazine 78 and the end portion of the lead frame 76 is formed to be slightly shorter than the horizontal distance between the fingers 66 on the sandwiching portion 62 and the abutting roller 68.

Next, the operation will be described. First, the motor 56 is energized, the output shaft thereof is rotated, and the link mechanism 60 is rotated.
The sandwiching portion 62 connected to the link mechanism 60 via the guide rail 50 is moved in parallel to both ends thereof,
The fingers 66 are opened together with the holding portion 62. In this state, the pickup device is arranged above the magazine 78 and then further lowered to the upper end of the magazine 78. Here, the motor 56 is again energized so that each finger 66 is moved to the center of the guide rail 50 and the thrusting roller 68 is moved to the magazine 7.
8 is moved in parallel until it comes into contact with the motor 8, and then the motor 56 is stopped. At this time, since the horizontal distance between the fingers 66 of the holding portion 62 and the abutting roller 68 is slightly longer than the horizontal distance between the outer wall surface of the magazine 78 and the end portion of the lead frame 76 stacked on the magazine 78, First, the finger 66 passes through the cutout portion 80 of the magazine 78 and comes into contact with the end portion of the lead frame 76.
The thrusting roller 68 comes into contact with the outer wall surface of the magazine 78 while spreading outward against the biasing force of 0. As a result, when the abutting roller 68 contacts the magazine 78, the lead frame 76 is held by the fingers 66 that are biased in the closing direction by the spring 70.

Therefore, in this state, the brake 58 is operated, the movement of the motor 56 is suppressed, and the pickup device is moved upward, whereby the lead frame 76 can be taken out from the magazine 78, and the lead frame 76 can be separated. Can be transported to the location. When the lead frame 76 is released, the brake 58 may be released, the motor 56 may be operated, and the finger 66 may be opened.

When the lead frame is sandwiched as described above,
Since the lead frame is clamped in a state where the fingers are always opened outward, the lead frame contacting the finger is only the uppermost lead frame of the laminated lead frames, and only one can be clamped at any time. In addition, the clamping force when clamping the lead frame at this time is determined by the difference between the horizontal distance between the outer wall surface of the magazine and the end of the lead frame, and the horizontal distance between the finger and the abutting roller in the clamping portion.
In order to change the type of lead frame to be transferred, if the magazine is unified so that the distance between the magazine and the lead frame is constant even if the magazine is replaced, the fingers can always hold the lead frame with the same holding force. The contact angle is also constant. Further, when it is desired to change the clamping force, it is possible to adjust the biasing force to the finger by taking out and putting in the screw loaded with the spring.

Although various preferred embodiments of the lead frame pickup device have been described above, the present invention is not limited to the above embodiments, and the drive source may be a solenoid or a rotary actuator instead of the motor. However, in order to prevent the lead frame from slipping on the fingers, a slip prevention material such as rubber may be attached to the abutting portion, or the abutting portion itself of the finger may be formed of a slip preventing material. Of course, many modifications can be made without departing.

[0017]

According to the lead frame pickup device of the present invention, the pair of holding portions can be slid by operating the drive source as described above, and the distance between the holding portions can be easily changed. Even if the lead frame has a different package, the work can be performed without replacing the pickup device. Further, since the holding portion slides along the guide rails and moves in parallel, even if the width size of the lead frame changes, the fingers of the holding portion can always contact the lead frame at a fixed angle. Therefore, if this angle is set to the optimum angle for sandwiching the lead frame, the fingers and the lead frame can always come into contact with each other at the optimum angle, and the lead frame can be prevented from falling and a plurality of sandwiches can be prevented. Exerts a remarkable effect.

[Brief description of drawings]

FIG. 1 is a front view of a lead frame pickup device according to a first embodiment of the present invention.

FIG. 2 is a bottom view of the pickup device of FIG.

FIG. 3 is a front view of a lead frame pickup device according to a second embodiment of the present invention.

FIG. 4 is a side view of the pickup device of FIG.

[Explanation of symbols]

 10 Guide Rails 14 Slide Guides 15 Drive Units 34 Clamping Units 40 Lead Frame 50 Guide Rails 54 Slide Guides 55 Drive Units 62 Clamping Units 76 Lead Frames

Claims (1)

[Claims] 1. A lead frame pickup device for picking up and transporting stacked lead frames one by one, and a guide rail formed in a long plate shape and provided with a slide guide on a lower surface thereof. A lead characterized by comprising a pair of sandwiching parts that are fitted to the slide guides of the rails and slidably supported along the guide rails, and a drive part for moving the sandwiching parts toward and away from each other. Frame pickup device.