JPH06321370A - Chuck device for narrow hard plate - Google Patents

Abstract

PURPOSE:To securely raise hard plates one by one from a stack of hard plates such as lead frame, etc. CONSTITUTION:A pair of chuck pieces 4a and 4b which hold a hard plate roughly at its center part in longitudinal direction from both right and left sides of it are provided on a vertically moving chuck head 3 located over a stack A, and a pair of sucking collets 9a and 9b which suck vacuously both the right and left ends of the hard plate are provided through vertically moving means 8a and 8b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when a large number of narrow hard plates such as lead frames used in the manufacture of electronic parts such as transistors are stacked, the hard plates are removed from the piles. The present invention relates to a chuck device that lifts up one by one and transfers and supplies to a supply site of a hard plate such as a transfer unit of a lead frame.

[0002]

2. Description of the Related Art In the case where a hard plate is lifted one by one from a pile of a plurality of narrow hard plates such as the lead frame and is transferred and supplied to a hard plate supply point, conventionally, the above-mentioned stacking is performed. Of the hard plates of the mountain, the top hard plate is picked up by suction with a vacuum chuck,
Alternatively, for example, as described in Japanese Patent Laid-Open No. 62-287990, among the hard plates of the pile, the hard plate at the uppermost surface is clamped and lifted so as to be sandwiched from the left and right sides thereof. I have to.

[0003]

However, in the conventional chuck device, as described above, the hard plate at the uppermost surface among the hard plates of the pile is attracted by vacuum, or
Alternatively, since it is lifted by sandwiching and clamping from both the left and right sides, when the hard plate on the uppermost surface and the next hard plate are in close contact, only the hard plate on the uppermost surface may be lifted. It is not possible to do so, and the next hard plate that is in close contact with it often lifts up at the same time, and as a result, two hard plates are supplied to the supply position of the hard plate in a stacked state, or the This causes a problem that the hard plate on the side falls.

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

[0005]

In order to achieve this technical object, the present invention provides a pile and a hard plate above a pile formed by stacking a large number of narrow hard plates such as lead frames. A chuck head configured to reciprocate between a location and a position is arranged, and one or both of the chuck head and the pile is configured to move up and down relatively, , A pair of chuck pieces for sandwiching the substantially central portion of the hard plate in the longitudinal direction from both left and right sides, and a pair of suction collets for vertically suctioning the left and right ends of the hard plate are moved up and down. It is configured to be provided via.

[0006]

[Operation] In this configuration, after the chuck head is moved down toward the pile, the hard plate on the uppermost surface of the pile is clamped by the pair of chuck pieces and vacuumed by the pair of suction collets. When adsorbed,
Either or both of the chuck head and the pile move vertically.

Next, a pair of suction collets for vacuum-sucking both ends of the hard plate are vertically moved by the vertically moving means in a state where the center of the hard plate on the uppermost surface is clamped by a pair of chuck pieces. To do. Then, the hard plate on the uppermost surface, by the vertical movement of the pair of suction collets, by being warped and deformed in a curved shape in the longitudinal direction, the next hard plate on the lower surface side of the hard plate on the uppermost surface. Even if they are in close contact, the next hard plate will be peeled off from the hard plate on the uppermost surface due to the curved warp deformation and fall off, so that only the hard plate on the uppermost surface can be reliably lifted. Of.

[0008]

Therefore, according to the present invention, each hard plate in the pile can be supplied to the supply position of the hard plate one by one, so that two hard plates are stacked at the supply position of the hard plate. In this state, it is possible to surely reduce the supply of the hard plate or the drop of the hard plate during the transfer to the supply location.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings of FIGS. In this figure, reference numeral 1 indicates 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 arranged in the stock box 1. Pile of piles A
Is provided.

Above and above the stock box 1, an elevating and lowering chuck head 3 reciprocates between the stock box 1 and a hard plate supply point (not shown) in the side part thereof. It is arranged as follows. A fixed chuck piece 4a is provided on the side surface of the central portion of the chuck head 3, while a movable chuck piece 4b is rotatably attached to the other side surface by a pin 5 so that the movable chuck piece 4b is attached. , The movable chuck piece 4b and the fixed chuck piece 4a are rotated by the pneumatic cylinder 6 provided between the upper end of the pile and the chuck head 3, so that the hard plate a on the uppermost surface of the pile A is formed. It is configured so that the substantially central part of is clamped from both left and right sides.

Further, vertical moving heads 7a and 7b are provided on both left and right ends of the chuck head 3, and the vertical moving heads 7a and 7b are attached to the chuck head 3 by air pressure. The cylinders 8a and 8b are configured to move up and down, and the vertical moving heads 7a and 7b
A vacuum suction type suction collet 9a, 9b is provided on each of b.

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

Then, the chuck head 3 and the pile A are lifted by moving the chuck head 3 up a little or the elevator 2 in the stock box 1 down a little. As shown in
Keep them slightly separated from each other. Then, in this state, both the 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 vertically moved by both suction collets 9a and 9b in a state where the substantially central portion is clamped by the pair of chuck pieces 4a and 4b. As shown by the alternate long and two short dashes line in FIG. 7, since it is warped and deformed in a curved shape in 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 warp deformation and falls off. is there.

Therefore, thereafter, after the chuck head 3 is largely moved upward, it is moved to the supply position of the hard plate,
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. The suction collets 9a and 9b at the four corners of the hard plate material a may be separately configured to move up and down independently.

[Brief description of 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.

FIG. 4 is a bottom view taken along the line IV-IV in FIG. 1.

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

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

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

[Explanation of symbols]

 A piles a Hard plate 1 Stock box 2 Lifting table 3 Chuck heads 4a, 4b Chuck pieces 6 Pneumatic cylinders 7a, 7b Vertical moving heads 8a, 8b Pneumatic cylinders 9a, 9b Adsorption collet

Claims (1)

[Claims] 1. A chuck head, which is configured to reciprocate between the pile and the supply point of the hard plate, is arranged above the pile formed by stacking a large number of narrow-width hard plates such as a lead frame. One or both of the chuck head and the pile are vertically moved up and down, and the chuck head sandwiches a substantially central portion in the longitudinal direction of the hard plate from both left and right sides. A pair of chuck pieces that are attached to each other, and a pair of suction collets that are configured to vacuum-suck the left and right ends of the hard plate are provided via vertical moving means. Chuck device.