JPH0636576Y2 - Lead frame transport device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a lead frame transfer device used in a step of bonding a lead frame to a hybrid IC substrate or the like.

(B) Conventional technology As an article holding mechanism for a robot hand, Japanese Patent Publication No. 58-508
As shown in Japanese Patent Publication No. 35, which is grasped by a plurality of fingers, by vacuum adsorption as in Japanese Patent Publication No. 58-33073, by magnet as in Japanese Publication No. 53-50221. There are various methods such as adsorption. Considering here the case where a comb-shaped lead frame made by punching a steel plate is conveyed, it is impossible to adsorb with a vacuum suction pad because the skeleton of the lead frame is too thin. Although adsorption by a magnet is possible, in this case, it is difficult to accurately determine the positional relationship between the hand and the lead frame. If you want to hold the lead frame without misalignment, it is better to use the finger method, but it is extremely difficult to grasp the lead without bending it and try to position it correctly.

(C) Problems to be solved by the present invention The present invention provides a device capable of transporting a steel plate lead frame in which a large number of leads are projected from one side of a main portion while ensuring a desired relative position. Is what you are trying to do.

(D) Means for Solving the Problems In the present invention, a magnet for attracting the lead frame is provided in the main body of the apparatus, and the main body is provided with positioning means as positioning means.
A pin protruding from the lower end surface of the main body and entering between the leads of the lead frame, and first and second positioning claws approaching the pin in directions perpendicular to each other are provided.

(E) Action At the time of adsorbing the lead frame on the lead frame supply holder, the positioning claws are both kept at a large horizontal distance from the positioning pin. When the main body that has adsorbed the lead frame moves away from the holding table, the positioning claws approach the positioning pins, the first positioning claws clamp the lead frame backbone between them, and the second positioning claws clamp the direction. And push the trunk at a right angle. As a result, the corner of the root of the lead is pressed against the positioning pin, and the position of the lead frame is determined with this point as a reference.

(F) Embodiment FIG. 9 shows a lead frame to be handled in this embodiment. The lead frame (1) is formed by stamping and forming a steel plate, and is plated with solder. The lead frame (1) has a shape in which a large number of leads (3) project from one side of the wide base portion (2). The structure of the carrying device (10) for carrying this is as follows. (11) is a vertically extending body, which is
It is attached to the side surface of the mounting base (12) via a slide guide (13) so as to be able to move up and down. The upper end of the body (11) is the air cylinder (14) installed on the upper surface of the mounting base (12).
The main body (11) is connected to the rod (15) and is vertically moved by the air cylinder (14). The mounting base (12) is fixed to an arm (16) of a Cartesian robot or a horizontal articulated robot, which allows the main body (11) to move in a horizontal plane.
The lower end surface of the main body (11) has a rectangular shape as shown in FIG. 3, in which a total of five permanent magnets (17) are embedded along the longitudinal direction thereof. This permanent magnet (1
The positioning pin (18) sticks out the head from between 7). The locating pin (18) is slidable and is maintained in a protruding state by a spring (19) as seen in FIG. When hitting an object, the positioning pin (18) retracts into the main body (11).

A slider (20) that slides in the vertical direction is attached to the side surface of the main body (11). The slider (20) is constantly pulled downward by a spring (23) until a tip of a stopper bolt (22) abuts a stopper (21) fixed to a side surface of a main body (11). (24) is attached to the shaft (2
It is the first positioning claw pivotally supported in 5). The positioning claw (24) is rotatable in a vertical plane, and is biased by a spring (26) so that its tip approaches the positioning pin (18). Its tip is a peripheral edge portion (27) parallel to the longitudinal direction of the lower end surface of the main body (11). The slider (20) also has a second positioning claw (28) pivotally supported by a shaft (29). The positioning claw (28) also rotates in the vertical plane,
The surface forms a right angle with the rotating surface of the positioning claw (24). The positioning claw (28) has its upper end pulled by a spring (30) and urges its lower end away from the positioning pin (18). Slider (2
When the rod (32) of the air cylinder (31) supported by (0) pushes the upper end, the lower end of the positioning claw (28) approaches the direction of the positioning pin (18). The body (11) is provided with a notch (33) for allowing the positioning claw (28) to move.

(34) is a lead frame supply holding base fixed to a stationary member. The holding table (34) has a mounting surface (35) at one end and a vertical wall (36) inside thereof. The lead frame (1) applies the trunk (2) to the vertical wall (36), and the lead (3)
Is mounted on the mounting surface (35) in such a manner that the tip of the is protruding from the holding table (34). A permanent magnet (37) is embedded in the vertical wall (36) to attract the lead frame (1) to prevent the lead frame (1) from falling from the mounting surface (35). The holding table (34) is continuous in the direction perpendicular to the paper surface, and the lead frame (1) is also sent in the direction perpendicular to the paper surface by a well-known feed rod mechanism that performs parallelogram movement.
The roller (38) is arranged on the opposite side of the mounting surface (35) with the vertical wall (36) interposed, and the top of the roller projects slightly above the vertical wall (36).

The above device operates as follows. The main body (11) is first positioned above the holding table (34) as shown in FIG. Next, when the main body (11) descends, the positioning claw (24) contacts the roller (38), and the positioning claw (24) moves to the positioning pin (1).
8) Rotate to increase the horizontal distance from. At the same time, the descent of the slider (20) also stops here. The main body (11) continues descending and hits the lead frame (1).
The positioning pin (18) then enters between the specific leads (3). This is the state shown in FIG. At this point in time, the lead frame (1) receives an attractive force from both the permanent magnet (17) and the permanent magnet (37), but the attractive force received from the permanent magnet (17) is much larger, and the main body ( 1
If 1) rises, the lead frame (1) is pulled up. When the lead frame (1) is pulled up in this way, the height of the positioning claws (24) (28) and that of the lead frame (1) approach each other, and eventually the positioning claws (2).
4) separates from the roller (38), the positioning claw (24) rotates toward the main body (11), and the core of the lead frame (1) is located between the edge portion (27) and the positioning pin (18). Hold part (2). Further, the positioning claw (28), which has kept a wide distance from the positioning pin (18) until now, is also pushed by the rod (32) of the air cylinder (31) and approaches the positioning pin (18), so that the lead frame (1) (2) is pushed at a right angle to the direction in which the positioning claw (24) and the positioning pin (18) clamp it. The transition during this period is shown in FIGS. 7 and 8. The corner of the root of the specific lead (3) is pressed against the positioning pin (18) that is inserted relatively roughly into the gap between the leads (3), and the angle of the lead frame (1) in the horizontal plane is also changed. The position and orientation of the lead frame (1) with respect to the main body (11) are determined here, following the peripheral portion (27). In this way, the lead frame (1) is carried to the target location and accurate placement is performed.

(G) Effect of the Invention In the present invention, the function of lifting the lead frame is ensured by using the magnet, and the first and second positioning claws approach each other from the directions perpendicular to the positioning pins inserted between the leads. In this way, since the positioning is performed with the root of the lead as a reference, it is possible to reliably transport and position the lead frame, which is a difficult-to-handle component.

[Brief description of drawings]

1 to 8 show an embodiment of the present invention. FIG. 1 is a side view, FIG. 2 is a partial front view, FIG. 3 is a bottom view, and FIGS. 4 to 6 are a series of operations. FIG. 7 and FIG. 8 are partial vertical sectional views showing the positioning operation. FIG. 9 is a perspective view of the lead frame. (1) ...... Lead frame, (2) …… Basic part, (3)
...... Lead, (10) …… Conveyor, (11) …… Main body,
(17) …… Magnet, (18) …… Positioning pin, (24) ……
First positioning claw, (28) ... second positioning claw, (3
4) …… Holding base for lead frame supply.

Claims (1)

[Scope of utility model registration request] 1. A body for transporting a steel plate lead frame having a large number of leads protruding from one side of a main portion, wherein the body is moved in a space and has a lead frame attracting magnet at a lower end thereof; Positioning pin that protrudes from the lower end face of the lead frame and that enters between the leads of the adsorbed lead frame and the positioning pin that is arranged on the side surface of the main body and the main body adsorbs the lead frame on the lead frame supply holder. The distance is kept wide, and when the main body that has adsorbed the lead frame moves away from the holding table, it approaches the positioning pin and clamps the lead frame trunk between it and the positioning pin, or at a right angle to the gripping direction. A lead frame transfer device having first and second positioning claws that push a part.