JP3158751B2 - Plate positioning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for accurately and smoothly positioning a plate-like object such as a lead frame, which is performed using a guide hole when processing the plate-like object. is there.

[0002]

2. Description of the Related Art In general, in a plate-like material such as a lead frame which is processed in multiple steps, it is necessary to accurately set the plate-like material at a predetermined position during processing. In such a case, positioning is performed by inserting a pilot pin into a guide hole on the lead frame. However, in recent years, the thickness of the lead frame has been reduced to 0.
Due to the extremely thin wall thickness of 25 mm or less, even if the insertion position is slightly displaced when inserting the pilot pin, the guide hole may be deformed or damaged, and accurate positioning may be performed. It's getting harder.

[0003]

As a method for avoiding such a problem, a positioning method based on an image processing method has been proposed, but the cost required for the apparatus is large and it is not economical.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problem in positioning a thin plate-like object such as a lead frame,
It is an object of the present invention to provide a device capable of performing accurate positioning without damaging or deforming a guide hole formed in a plate-like object.

[0005]

According to the present invention, there is provided a pilot pin having a base portion connected to a lifting / lowering drive device via a pivot bearing and having a tip formed at an acute angle, and the pilot pin being rotatable. A bearing part that slides through,
A positioning device for a plate-like object comprising an impeller mounted on the trunk of the pilot pin coaxially with the pilot pin, and a compressed air injection nozzle for rotating the impeller.

[0006]

In the positioning apparatus of the present invention, unlike the conventional pilot pin which simply descends vertically,
Since the pilot pin connected to the pivot bearing is rotated and inserted into the guide hole of the plate-like object from its acute angle, the insertion stress is divided into the vertical stress and the cut-line stress due to the rotation, and the Since the pushing force of the guide hole with respect to the unit contact amount is small, this, combined with the action of the pivot bearing, makes it possible to smoothly deform the guide hole even if the insertion of the pilot pin is slightly biased, without causing any deformation. A positioning operation can be performed.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

FIG. 1 is a schematic sectional view showing an embodiment of the present invention, and FIG. 2 is a perspective view of a pilot pin used in the apparatus of the present invention. In the drawing, reference numeral 1 denotes a pilot pin having a sharp end, 2 denotes a coil spring that pushes up the pilot pin 1 to prevent the pilot pin 1 from dropping by its own weight, and 3 denotes a guide that guides the pilot pin 1 vertically and together with the pilot pin 1 A rotating bush, 4 is a rotary bearing, 5 is an impeller coaxially mounted in the middle of the body of the pilot pin 1, and 6 is provided on the side of the impeller 5 so as to apply a rotational force to the impeller 5. An injection nozzle for blowing compressed air, 7 is a pivot bearing connected to the other end of the pilot pin 1, 8 is a pilot pin 1 through the pivot bearing 7
An elevating cylinder device 9 for raising and lowering is a plate-like object requiring positioning, and a positioning guide hole 10 is provided at a predetermined position of the plate-like object 9. Reference numeral 11 denotes a positioning stage on which the plate 9 is placed. The positioning stage 11 has a through hole 12 communicating with the guide hole 10 of the plate 9.

Next, a positioning method using the apparatus of the present invention will be described. In a normal state, the pilot pin 1 is lifted by the coil spring 2, and when performing a positioning operation, a plate-like object 9 such as a lead frame which needs positioning is supplied to a predetermined position of the positioning stage. And the pilot pin 1 connected via the pivot bearing 7 by operating the cylinder device 8
Is lowered. When the pilot pin 1 starts descending, compressed air is blown from the side injection nozzle 6 toward the impeller 5 coaxially mounted on the pilot pin 1, and the pilot pin 1 is moved between the rotary bearing 4 and the pivot bearing 7. Rotate.

When the pilot pin 1 continues to descend in this state, the pilot pin 1 descends along the bush 3,
The positioning is performed by being inserted into the positioning guide hole 10 provided in the plate-shaped object 9 from the acute angle portion at the tip. In this state, the plate-like object is processed, and when the processing is completed, when the cylinder device 8 is raised, the pilot pin 1 is pushed up by the action of the coil spring 2 and is separated from the plate-like object 9. By repeating the above operations, positioning in a number of processing steps for a lead frame or the like can be smoothly performed.

[0011]

As described above, according to the positioning apparatus of the present invention, positioning is performed by inserting the pilot pin into the guide hole provided in the plate-like object in the process of processing a thin plate-like object such as a lead frame. At this time, the positioning operation can be performed accurately and smoothly without deforming or damaging the guide hole.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a plate-shaped object positioning apparatus according to the present invention.

FIG. 2 is a perspective view of a pilot pin in the device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pilot pin 2 Coil spring 3 Bush 4 Rotary bearing 5 Impeller 6 Compressed air injection nozzle 7 Pivot bearing 8 Cylinder device 9 Plate (lead frame) 10 Guide hole 11 Positioning stage 12 Through hole

Claims (1)

(57) [Claims] 1. A pilot pin having a base portion connected to a lifting / lowering drive device via a pivot bearing and a tip portion formed at an acute angle,
The pilot pin is rotatably slidably passed through a bearing portion, an impeller mounted on the body of the pilot pin coaxially with the pilot pin, and a compressed air injection nozzle for rotating the impeller. Plate positioning device.