JP3316254B2 - Chuck device for narrow hard plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example, when a large number of narrow hard plates such as lead frames used in the production of electronic parts such as transistors are stacked, the hard plates are removed from the pile. The present invention relates to a chuck device that lifts sheets one by one and transfers and supplies the same to a hard plate supply point such as a lead frame transfer unit.

[0002]

2. Description of the Related Art Conventionally, when a plurality of narrow hard plates such as a lead frame are stacked and the hard plates are lifted one by one from a pile and transferred / supplied to a supply point of the hard plates, the conventional method is employed. Lifting the hard plate on the top surface of each mountain hard plate by suction with a vacuum chuck,
Alternatively, for example, as described in Japanese Patent Application Laid-Open No. 62-287990, the hard plate on the uppermost surface among the hard plates of the pile is clamped and lifted so as to be sandwiched from both left and right sides thereof. I have to.

[0003]

However, in the conventional chuck device, as described above, the hard plate on the uppermost surface among the hard plates in the pile is suctioned by vacuum or
Alternatively, since it is lifted by clamping and clamping from both right and left sides, when the hard plate on the uppermost surface and the next hard plate are in close contact, it is possible to lift only the hard plate on the uppermost surface. The next hard plate that is in close contact with the hard plate often rises at the same time, and as a result, two hard plates are supplied at the supply point of the hard plate in a stacked state, or during the transfer to the supply point, This causes a problem that the hard plate on the side drops.

It is an object of the present invention to provide a chuck device capable of reliably lifting only the uppermost hard plate even when the stacked hard plates are in close contact with each other. Is what you do.

[0005]

In order to achieve this technical object, the present invention relates to a method for manufacturing a chuck head, comprising the steps of : providing a chuck head over a pile formed by stacking a large number of narrow hard plates such as a lead frame ;
The pile and one hard plate in the pile.
Arranged to reciprocate between supply points that supply
Then, one or both of the chuck head and the pile are relatively vertically moved up and down.
On the other hand, the chuck head is provided with a pair of chuck pieces that sandwich a substantially central portion in the longitudinal direction of the hard plate from both left and right sides, and has a length in the hard plate .
A pair of suction collets that are vacuum-adsorbed at both left and right ends in the hand direction are moved up and down.
It is provided via a vertical movement means. ".

[0006]

[For work] In this configuration, the chuck head, those
When the chuck head is located directly above the pile,
Te, after descending motion towards the heap, the hard plates in the top surface of the hard plate in this heap, with clamps by a pair of chuck pieces, when vacuum suction by a pair of suction collet, the chuck One or both of the head and the pile move up and down so as to be separated from each other.

Next, a pair of suction collets for vacuum-suctioning both ends of the hard plate in a state in which a substantially central portion of the hard plate at the uppermost surface of the piles is clamped by a pair of chuck pieces, Both ends of the hard plate were vacuum-adsorbed
As it is, it is moved up and down by the vertically moving means. Then, the hard plate on the uppermost surface is deformed in a curved shape with respect to the longitudinal direction by the vertical movement of the pair of suction collets, so that the next hard plate on the lower surface side of the hard plate on the uppermost surface. Even if they are in close contact with each other, the next hard plate is separated from the hard plate on the uppermost surface and falls off due to the curved warpage, so that only the hard plate on the uppermost surface can be reliably lifted. It is.

[0008]

Therefore, according to the present invention, each hard plate in the pile can be supplied one by one to the supply position of the hard plate, and two hard plates are stacked on the supply position of the hard plate. And the hard plate is reliably prevented from dropping during transfer to the supply location.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In this figure, reference numeral 1 denotes a stock box of a narrow hard plate a such as a lead frame, and a large number of the hard plates a are stacked on the upper surface of a lift 2 provided in the stock box 1. Stack A
Is provided.

An elevating chuck head 3 reciprocates between the stock box 1 and a hard plate supply point (not shown) on the side of the stock box 1 above the stock box 1. It is arranged as follows. In the center of the chuck head 3, a fixed chuck piece 4a is provided on a side surface thereof, and a movable chuck piece 4b is pivotally attached to the other side by a pin 5 so as to be rotatable. The movable chuck piece 4b and the fixed chuck piece 4a are rotated by the pneumatic cylinder 6 provided between the upper end thereof and the chuck head 3 so that the hard plate a on the uppermost surface of the pile A is stacked. Of these, a substantially central portion in the longitudinal direction is configured to be clamped from both left and right sides.

Further, a vertically moving head 7a, 7b is disposed at each of the left and right ends of the chuck head 3, and each of the vertically moving heads 7a, 7b is mounted on the chuck head 3 by an air pressure. The heads are configured to move up and down by cylinders 8a and 8b.
b, the longitudinal direction of the hard plate a on the uppermost surface
The suction collets 9a and 9b for vacuum-sucking the opposite ends are provided.

In this configuration, the chuck head 3 is
As shown in FIG. 6, after moving downward toward the pile A in the stock box 1, the movable chuck piece 4b
Is closed and rotated by the pneumatic cylinder 6 to clamp a substantially central portion of the hard plate a on the uppermost surface of the pile A with the movable chuck piece 4b and the fixed chuck piece 4a, Both ends of the hard plate a are vacuum-sucked by both suction collets 9a and 9b.

Next, the chuck head 3 and the pile A are moved upward by slightly moving the chuck head 3 or slightly lowering the lift 2 in the stock box 1 as shown in FIG. As shown in
Keep them slightly apart from each other. In this state, the two suction collets 9a and 9b are moved up and down by the pneumatic cylinders 8a and 8b respectively.
Then, the hard plate a on the uppermost surface is moved up and down by the two suction collets 9a and 9b while the substantially central portion thereof is clamped by the pair of chuck pieces 4a and 4b. As shown by a two-dot chain line in FIG. 7, since it is deformed in a curved shape with respect to the longitudinal direction,
Even if the next hard plate is in close contact with the lower surface side of the hard plate a on the uppermost surface, the next hard plate peels off from the hard plate a on the uppermost surface due to the curved warpage and falls off. is there.

Therefore, after that, after the chuck head 3 is largely moved up and moved to the hard plate supply point,
By releasing the clamp by the pair of chuck pieces 4a and 4b and the vacuum suction of both suction collets 9a and 9b, the hard plate can be supplied to the hard plate supply location. Each of the suction collets 9a and 9b at the four corners of the hard plate material a may be configured to individually move up and down independently.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a side view taken along the line III-III in FIG. 1;

FIG. 4 is a bottom view taken along line IV-IV of FIG. 1;

FIG. 5 is a plan view taken along line VV of FIG. 1;

FIG. 6 is a diagram showing a first operation state.

FIG. 7 is a diagram showing a second operation state.

[Explanation of symbols]

 A Stacking pile a Hard plate 1 Stock box 2 Lifting table 3 Chuck head 4a, 4b Chuck piece 6 Pneumatic cylinder 7a, 7b Vertical moving head 8a, 8b Pneumatic cylinder 9a, 9b Suction collet

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65H 3/08 B25J 15/06 B65G 59/04

Claims (1)

(57) [Claims] 1. A chuck head is provided above a pile formed by stacking a plurality of narrow hard plates such as a lead frame .
The pile and the hard plate in the pile are supplied one by one.
It is arranged so as to reciprocate between a supply point to be supplied, and one or both of the chuck head and the pile are configured to relatively vertically move up and down, while the chuck head has A pair of chuck pieces are provided so as to sandwich a substantially central portion in the longitudinal direction of the hard plate from both left and right sides, and a pair of longitudinal left and right ends of the hard plate are vacuum-adsorbed. A narrow width hard plate chucking device , wherein a suction collet is provided via vertical movement means for vertically moving the suction collet .