JPH05102203A - Lead frame fixing device - Google Patents

Abstract

PURPOSE:To obtain the title fixing device, having excellent workability, with which a lead frame can be fixed without coming into contact with the lead frame. CONSTITUTION:The title lead frame fixing device is equipped with a pinion 10 provided in the center of rotation of a press plate 3 with which a lead frame 1 is pressed, a rack 11 which is meshed with the pinion, and a direct-acting cylinder 13 which is attached to the edge face of the rack through the intermediary of a yoke 12. Accordingly, the lead frame is pressed down by the assembly of the rack, the pinion and the cylinder, and as a result, the device, having high workability, can be manufactured at low cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead frame fixing device used when inspecting or marking a lead frame.

[0002]

2. Description of the Related Art FIG. 5 is a perspective view showing a conventional lead frame fixing device, in which 1 is a lead frame,
A pair of guide rails 2 guides the lead frame in the width direction, and the lead frame 1 is placed on the stepped portion 2a. Reference numeral 3 denotes a retainer plate attached to the guide rail 2 at four corners of the lead frame 1 for fixing the lead frame 1, 4 a shaft penetrating the retainer plate 3 and attached to the guide rail 2, and 5 a shaft 4 The compression spring is inserted between the flange portion and the holding plate 3.

Next, the operation will be described. The lead frame 1 is carried onto the stepped portion 2 a of the pair of guide rails 2 by a lead frame carrying device (not shown) while the holding plates 3 at the four places are rotated to the outside of the guide rail 2.
At this time, the width of the guide rail 2 is matched with the width of the lead frame 1. Next, by lifting the presser plate 3 and rotating it to bring it onto the lead frame 1,
The lead frame 1 is fixed, and the same work is performed in four places in sequence. Then, after that, the inspection of the lead frame 1 with a microscope and the work such as marking on the lead frame 1 are performed.

[0004]

Since the conventional lead frame fixing device is constructed as described above, when fixing the lead frame, it is necessary to operate the fixing portions at four places, and it takes time to fix the lead frame. However, there is a problem in that the lead frame may be touched by the hand during fixing.

The present invention has been made to solve the above problems, and an object thereof is to obtain a lead frame fixing device which has good workability and can fix a lead frame without touching a product.

[0006]

A lead frame fixing device according to the present invention comprises a mechanism for combining a cylinder, a rack and a pinion and rotating a holding plate.

[0007]

The lead frame fixing device according to the present invention uses the cylinder, the rack, and the pinion to fix the lead frame without touching the lead frame.

[0008]

EXAMPLES Example 1. An embodiment of the present invention will be described below with reference to the drawings. 1 and 2, 1 is a lead frame, 2 is a pair of guide rails, 3 is a holding plate for pressing and fixing the lead frame 1 in the longitudinal direction, 6 is a lever to which the holding plate 3 is attached, and 7 is a lever 6 Which is a fulcrum of rotation of the bearing, 8 is a rolling bearing, 9 is a bearing block that supports the rolling bearing 8 and the shaft 7, and is attached to the end of the guide rail 2, 10 is a pinion attached to the shaft 7, and 11 is a pinion. A rack meshed with 10 is a joint for connecting the rack 11 and the rod portion 13a of the linear motion cylinder 13, 1
Reference numeral 4 is a mounting plate for mounting the linear motion cylinder 13 on the bearing block 9, and 15 is a compression spring which is fitted into the rod portion 13a of the linear motion cylinder 13 and applies a pressing force to the pressing plate 3 for fixing the lead frame 1.

Next, the operation will be described. First, presser plate 3
In the open state 3a, the lead frame 1 is carried between the guide rails 2 by a lead frame carrier (not shown). Next, air is supplied to the linear motion cylinders 13 arranged at the four end portions of the rail 2 and the cylinder rod 1
3a is pulled in, and the cylinder rod 13a and the joint 12
The rack 11 that is connected via the rack descends. The linear motion of the rack 11 causes the pinion 10 to rotate, and the rotational motion of the pinion 10 causes the retainer plate 3 to rotate in the B direction with the shaft 7 as a rotation fulcrum, thereby retaining the lead frame 1. At this time, the spring 15 can provide backlash between the rack 11 and the pinion 10. afterwards,
When the lead frame 1 is inspected with a microscope and the like is completed, the linear motion cylinder 13 moves in the opposite direction to the above, whereby the holding plate 3 rotates in the direction A, and the lead frame 1 is opened. It is carried away from between the rails 2 by the lead frame carrying device.

Embodiment 2. In the above embodiment, the rail 2
The linear cylinder 13 and the rack 11 are respectively provided at four end portions of the
Although the pinion 10 is shown, the linear motion cylinder 13 and the rack 11 and the pinion 10 may be integrated in one place by separately combining spur gears. That is, in FIGS. 3 and 4, 16 is a driven pulley attached to the rotation fulcrum shaft 7 of the holding plate 3, 17 is a driving pulley connected to this by a belt 18, and the above 16 to 18 form a left-right pair. ing. Further, 19 and 20 are spur gears mounted on the same shaft as the drive pulley and engaged with each other, and the pinion 10 is mounted on the axis of the spur gear 20 so as to rotate simultaneously. Reference numeral 21 denotes a mounting plate that holds the spur gears 19 and 20 and the pinion 10 rotatably and to which the direct acting cylinder 13 is fixed, and 22 denotes a base on which the mounting plate 21 is vertically adjustable.

Next, the operation will be described. When the holding plate 3 is in the open state (position A), the rod 13a of the linear motion cylinder 13 is in the retracted state. When air is supplied to the linear cylinder 13, the rod 13a is pushed out to push up the rack 11 and rotate the pinion 10 counterclockwise. At the same time, the spur gear 20 rotates and the meshed spur gear 19 also rotates in the opposite direction to the spur gear 20. In this way, the rotation of the spur gears 19 and 20 is sequentially performed by the drive pulley 1.
7, the belt 18, and the driven pulley 16, and the lever 6 and the pressing plate 3 are rotated in the B direction with the shaft 7 as the center of rotation to press the lead frame 1.

Further, it is necessary to adjust the width of the guide rail 2 according to the width of the lead frame 1. At this time, if the position of the guide rail 2 is moved, the driven pulley 16 is moved.
However, in this case, the tension of the belt 18 can be kept constant by adjusting the attachment position of the attachment plate 21 to the base 22.

[0013]

As described above, according to the present invention, since the lead frame is pressed down by the combination of the rack, the pinion and the cylinder, the device can be made inexpensive and the workability is high. It is effective.

[Brief description of drawings]

FIG. 1 is a side view showing a lead frame fixing device according to an embodiment of the present invention.

FIG. 2 is a plan view showing an embodiment of the present invention.

FIG. 3 is a side view showing another embodiment of the present invention.

FIG. 4 is a plan view showing another embodiment of the present invention.

FIG. 5 is a perspective view showing a conventional lead frame fixing device.

[Explanation of symbols]

 1 lead frame 2 guide rail 3 retainer plate 7 axis 10 pinion 11 rack 13 linear cylinder 15 compression spring

Claims (3)

[Claims] 1. A pair of presser plates for fixing both sides of a lead frame placed on a pair of guide rails, shafts arranged at four positions at both ends of each presser plate and serving as rotation centers of the presser plates, and this shaft. A lead frame fixing device, comprising: a pinion for rotating a rack, a rack engaged with the pinion, and a cylinder connected to the rack. 2. The lead frame according to claim 1, wherein a direct acting cylinder is connected to an end of the rack via a joint, and a compression spring is interposed between the main body of the cylinder and the joint. Fixed device. 3. A pair of holding plates for fixing both sides of a lead frame placed on a pair of guide rails, and a pair of pulleys and belts attached to the ends of the holding plates for rotating the holding plates. A lead frame fixing device comprising a spur gear, a pinion for rotating the spur gear, a rack, and a cylinder connected to the rack.