JPS6393896A - Jig for treating lead frame - Google Patents

Abstract

PURPOSE:To carry out automatic and efficient surface treatment of lead frames, by clamping and unclamping the lead frames guided by a work guide with holding arms arranged radially around an intermittently rotating body placed at the upper part of a soln. tank. CONSTITUTION:An intermittently rotating body 3 is placed at the upper part of a soln. tank T contg. a soln. W such as a plating soln. or a washing soln. so that the lower part of the body 3 is submerged in the soln. W or kept close to the soln. W. Many holding arms 4 which are freely closed and opened to clamp and unclamp lead frames L are radially arranged around the rotating body 3. A work guide 14 for guiding the lead frames L to the holding arms 4 is placed so that it can be moved forward and backward. The resulting jig for treating lead frames is compact, has a simple structure and easily undergoes maintenance and overhauling. Automatic and efficient surface treatment of lead frames can be carried out by using the jig.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a lead frame processing jig used for electrically and chemically processing the surface of a lead frame. be.

(Prior art) - M. In order to electrically and chemically treat the surface of the sort frame, is it sent to a treatment process such as electrolysis, electroplating, water washing, pickling, etc.? Either by manually suspending the lead frame one by one on a transport rail and continuously immersing it in a solution such as plating solution or cleaning solution in a solution tank, or by using a special jig, A number of lead frames were attached to the wafer, and the lead frames were immersed in a solution along with a jig to perform surface treatment.

(Problem to be Solved by the Invention) However, the method of manually suspending lead frames one by one on a transfer rail is difficult to carry out in and out of the lead frame loading/unloading line, considering the processing time cycle and production volume. However, the drawback was that it required a considerable amount of equipment space.

In addition, when using a conventional dedicated jig, the lead frame had to be attached and removed from the jig each time by an operator or by hand, which was cumbersome and had the drawback of low efficiency. .

The present invention was proposed in view of the above-mentioned conventional drawbacks, and is a method for processing lead frames that does not require a large space, can automate the surface treatment process of lead frames, and can greatly contribute to improving processing efficiency. The purpose is to provide a jig.

[Structure of the Invention (Means for Solving the Problems)] In order to solve the above-mentioned problems, the present invention is designed to be supported on the upper part of a solution tank in which a solution such as a plating solution or a cleaning solution is stored, and the lower part of the solution tank is An intermittent rotating body that is submerged in water or close to it and rotates intermittently, clamping arms that are arranged radially around the outer circumference of the intermittent rotating body and can be opened and closed to clamp and unclamp the lead frame at the tip, and clamping and unclamping by the clamping arms. A lead frame processing jig is constructed of a moatable work guide that guides the slide frame to be unclamped.

(Function) Since the lead frame processing jig of the present invention is configured as described above, the lead frame carried in via the conveyance device (not shown) is guided by the advanced work guide, and is clamped at a predetermined position. clamped by the arm,
After the work guide is retreated to prevent interference, it is immersed in a solution contained in a solution bath by rotation of an intermittent rotating body, and surface treatment is performed. The lead frame that has undergone surface treatment is lifted out of the solution again without interfering with the work guide that has retreated due to the rotation of the intermittent rotating body, and is unclamped at a predetermined position on the work guide that has been advanced from the clamping arm. . The lead frame unclamped from the clamping arm is guided by a work guide and carried out to a transport device (not shown), and then moved to the next operation. By repeating the above operations, the lead frame will be automatically processed and surface treated efficiently.

(Example) Hereinafter, the present invention will be specifically described based on an example shown in the drawings.

FIG. 1 is a plan view showing a specific example of a lead frame processing jig according to an embodiment of the present invention, FIG. 2 is a partially cutaway front view thereof, and FIG. 3 is a partially cutaway side view thereof. . Also, the fourth
The figure is a front view showing how the gripping arm is attached, and FIG. 5 is a side view showing the opening/closing mechanism of the gripping arm. In the figure, T is a solution tank with a semicircular cross section, and a solution W such as a plating solution, a cleaning solution, etc. is stored inside the tank.

Reference numeral 1 denotes a pedestal located at the center of both sides of the solution tank T. At the top of the pedestal 1, a rotating shaft 2 which is intermittently rotated by a motor M1 having a built-in gear is supported by bearings 19 and 19.

Reference numeral 3 denotes an intermittent rotating body that is fixed to the rotating shaft 2 and rotates intermittently together with the rotating shaft 2. The rotating body 3 is supported on the upper part of the solution tank T, and its lower part is submerged in the solution W contained in the solution tank T. Or they are arranged to rotate intermittently in close proximity.

Reference numeral 4 has a clamping arm arranged radially around the outer circumference of the intermittent rotating body 3, a clamp plate 5 (see Fig. 4), and a fixing plate 6, and the clamp plate 5 can swing around the bottle 7 as a fulcrum. There is.

Further, reference numeral 8 denotes a guide pin whose head is fixed to the clamp plate 5 and whose leg extends through the fixing plate 6, and a stopper 8' fixed to the lower end of the guide pin 8 and the bottom surface of the fixing plate 6. A spring 9 is interposed between them. 5a and 6a are clamp pieces fixed to the tips of the clamp plate 5 and the fixing plate 6, respectively, and the dimensions and shapes of the clamp pieces 5a and 6a are similar to that of the clamping arm 4.
It is designed to match the size and shape of the lead frame L to be clamped at the tip of the lead frame L.

Next, reference numeral 10 denotes a pair of bearings installed at intervals on the bottom surface of the fixed plate 6, and the bearings lO have a slide shaft 11 formed with a tapered surface 11a that abuts and engages with the lower end of the guide pin 8. Or, it is supported so that it can slide freely. Further, a spring 22 for retracting the slide shaft 11 and a spring receiver 21 for transmitting spring pressure to the slide shaft 11 are fixedly supported.

Reference numeral 12 denotes a cylinder that allows the slide shaft 11 to move forward and backward. When the piston rod 20 is moved backward and the slide shaft 11 is moved backward by the action of the spring 22, the lower end of the guide pin 8 engages with the tapered surface 11a and descends. The clamp piece 5a is clamped by the spring pressure of the spring 9.

When the lead frame L is clamped between 6a and the slide shaft 11 is advanced by the piston rod 20, it engages with the lower end of the guide bin 8 or the tapered surface 11a and rises, widening the interval between the clamp pieces 5a and 6a, The clamped lead frame L will be unclamped.

Next, reference numeral 13 denotes a frame provided on the left and right sides of the solution tank T, on which the lead frame is guided to a predetermined position via a conveying device (not shown), and only the clamped lead frame is moved by the intermittent rotating body 3. When rotating, it is driven by motor M2 to prevent interference with guide plate 18.
A work guide 14 that can move forward and backward is installed. 15 is a screw shaft connected to the motor M2. When the screw shaft 15 is rotated by the motor M2, the movable plate 16 engaged with the screw shaft 15 with a nut moves in the axial direction of the screw @15, and the two A guide plate 18 attached to the tip of the guide bar 17 guides the lead frame L.
The lead frame L is clamped by the clamping arm 4, and the lead frame L is unclamped. The method for moving the work guide 14 forward and backward is not limited to the motor and screw shaft of this embodiment, as long as there is a method for moving the work guide 14 forward and backward, such as a cylinder.

Note that the guide plate 18 of the work guide 14 is designed in accordance with the dimensions and shape of the lead frame L.

To perform surface treatment using the lead frame processing jig of the present invention having the above configuration, for example, the guide plate 18 of the work guide 14 advanced from the X1 direction shown in FIG. The guided lead frame L is carried in. At this time, the intermittent rotating body 3 stops, the clamping arm 4 advances the slide shaft 11 via the piston rod 20, and if the unclamped state or only the lead frame enters between the clamp pieces 5a and 6a, the cylinder 12 The piston rod 20 is moved back, the slide shaft 11 is moved back, and the lead frame L is clamped. After that, the guide plate 18 of the work guide 14 is moved backward, and then the motor M1
The intermittent rotating body 3 is rotated, and the lead frame L is immersed in the solution W. After a predetermined period of time has elapsed, the intermittent rotating body 3 is rotated to pull up the lead frame L, and is stopped at a predetermined position. Next, guide plate 1 of work guide 14
8, the clamping arm 4 may be unclamped, the lead frame L may be received and guided by the guide plate 18, and the lead frame L may be transported in the x1' direction via a transport device (not shown).

Note that the lead frame L may be transported from the Xt (X2) direction and transported from the X1'(X2') direction, or from the X, (X2) direction and transported from the X2' (
It may also be carried out from the x, ') direction.

Furthermore, when changing the surface treatment time of the lead frame L, a motor M that drives the intermittent rotating body 3 is used.

As shown in FIG.
Lead frame L to be clamped by d...)
For example, 4a, 4c, 4e, 4g.
Clamp the lead frame L by ... to make the cycle time longer, or clamp every two lead frames L to make the cycle time shorter. The cycle time may be adjusted by changing the pitch.

Further, in this embodiment, the clamping arm 4 is configured to be clamped and unclamped by the spring pressure of the spring 9 and the lifting and lowering of the guide pin 8, or these may be operated electrically or magnetically.

[Effects of Issue 111] As specifically explained above, according to the grate frame processing jig of the present invention, after sequentially clamping the conveyed grate frames and immersing them in a solution, All operations such as lifting and unclamping can be performed automatically. Further, since the lead frame is surface-treated by being immersed in a solution while being rotated while being clamped by the clamping arms disposed on the intermittent rotating body, the planar space required for the equipment can be reduced. In addition, the structure is extremely simple, easy to handle, and easy to maintain and inspect. The present invention provides a lead frame processing jig that is extremely effective in practice for efficiently surface treating lead frames.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a specific example of a lead frame processing jig according to an embodiment of the present invention, FIG. 2 is a partially cutaway front view thereof, FIG. 3 is a partially cutaway side view thereof, and FIG. FIG. 4 is a front view showing how the gripping arm is attached, and FIG. 5 is a side view showing the opening/closing mechanism of the gripping arm. l... Frame, 2... Rotating shaft, 3... Intermittent rotating body,
4... Clamping arm, 5... Clamp plate, 5a... Clamp piece, 6... Fixing plate, 6a... Crank piece, 7...
...Pin, 8...Guide pin, 9...Spring, lO・
... Bearing, 11... Slide shaft, lla... Tapered surface, 12... Cylinder, 13... Frame, 14...
・Work guide, 15... Screw shaft, 16... Moving plate, 17... Guide bar, 18... Guide plate, 19.
...bearing, 20...piston rod, 21...spring receiver, 22...spring, Mr, M2...motor, T...solution tank, W...solution, L... ·Lead frame.

Claims (1)

[Claims] An intermittent rotating body is supported on the upper part of a solution tank in which a solution such as a plating solution or a cleaning solution is stored, and the lower part is immersed in or close to the solution and rotates intermittently. , a lead frame processing characterized by comprising: a clamping arm that can be opened and closed to clamp and unclamp the lead frame at its tip; and a work guide that can move forward and backward to guide the lead frame that is clamped and unclamped by the clamping arm. jig.