JPS63196050A - Flexible set mechanism of leadframe magazine - Google Patents

Abstract

PURPOSE:To enable magazines in arbitrary width within specified range to be automatically set up by a method wherein a magazine table, a press down mechanism, a Y axis shifting mechanism and a discharge mechanism are provided. CONSTITUTION:The central lines of magazine 2 and a shooter 3 in reference to the width of magazines 2 are previously aligned with each other by a Y axis shifting mechanism. When multiple magazines 2 placed on a magazine table 12 are pressed down by a press down plate 17 to be inserted into a magazine receiver 26, they are fixed by a clamp mechanism 27 and then lifted by a vertical shifting mechanism 24 to be lifted and stopped repeatedly up to the position of shooter 3 for containing leadframe. The magazine receiver 26 containing the leadframe is further lifted and stopped up to the position of a discharge table 21 to be pushed out by an air pusher 19 so that the magazines 2 may overlap one another on the discharge table 21 to be placed thereon by releasing the clamp mechanism 27.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention applies to the continuous processing of lead frames.
The present invention relates to a mechanism for setting a magazine in order to transfer a lead frame between the magazine and the shooter.

[Following vehicle technology] In the manufacturing process of IC devices of semiconductor products, the frame island lb on the lead frame 1 shown in FIG.
(commonly known as a tab) (commonly known as a tab) (commonly known as a bullet attachment), and wire bonding (commonly known as a wire attachment) that connects the IC chip 1c on a lead frame and the lead 1a with a wire f? : There is karma.

In order to carry out such mounting and bonding of the IC chip by a flow process, the lead frame is transported by a shooter and processed thereon. The processed lead frame is transferred from the shooter to the magazine and stored therein, and then transferred to the next process at a separate location and, if necessary, transferred to the shooter at that location.

Figure 5 shows the lead frame 1 between the magazine and the shooter.
The magazine 2 has a constant bi-sochi interval H2a on both inner surfaces, and is moved upward or downward by a pinch interval in the direction of arrow B by a vertical movement mechanism (not shown). On the other hand, a chute 3 is provided at a certain height position, and the lead frame 1 which has been processed is
are conveyed over the shooter 3 in the direction of arrow A, are ejected, and are sequentially inserted one by one into the magazine 1i12a.

Note that when the lead frame 1 is transferred from the magazine 2 to the shooter 3, the lead frame 1 is ejected onto the shooter 3 and conveyed by a push-out mechanism (not shown).

Fig. 6 shows an example of a set I1m used for the conventional delivery between a magazine and a shooter. A magazine mounting plate 8 is fixed to several movers 5a. A magazine holder ll is installed on the magazine mounting plate 8.

The magazine 2 is held by a magazine holder 11 in a direction facing the shooter 3, and by rotation of the screw 5, the magazine mounting table 8 is moved vertically by the distance between WA2a of the magazine and the lead frame from the shooter 3. 1 is inserted into the magazine 2 in sequence, the magazine holder 11 is capable of holding two magazines 2-1 and 2-2, and the lever 10a attached to the motor lO is
By reversing the lever! 01 and the slider 6a guided by the slide rod 6 is connected to the connecting rod 7n, the magazine mounting plate 8 is moved in the direction of the arrow C, and either one of the magazines 2 is placed opposite the shooter 3 for delivery. During this time, the other magazine is replaced.

Recently, with the remarkable expansion of the use of IC devices, the quantity and types (especially sizes) of lead frames have increased, and it is now necessary to process them quickly in large quantities. The working efficiency of the mechanism is not good. That is, although 2rgi magazines can be placed, they must be replaced with new ones each time 111M is completed, and therefore an operator must always be on standby. Therefore, there is a need for an automatic mechanism that can load a plurality of magazines at once, moves the loaded magazines to the shooter position, stores the lead frame, and arranges the stored magazines at appropriate locations.

A mechanism having such an automatic magazine setting function has been proposed and filed as a patent application entitled ``Lead Frame Magazine Setting Mechanism'' by the applicant of the present invention. However, the mechanism of the application is intended for magazines of a certain size, and as mentioned above, the mechanism of the application is
Magazines of any size that are applied to lead frames of different sizes cannot be taken as is. The width of the chute is also changed, but it is necessary to align the center line of the magazine in the Y-axis direction with the center line of the chute, and this requires a movement mechanism for positioning the magazine receiver in the Y-axis direction. It becomes necessary. Furthermore, in order to stably support magazines of different widths, it is necessary to consider the size of the magazine holder (the size of the magazine holder and the width of the bottom surface) and the method of fixing the magazine. In response to these problems, there is a need for a flexible mechanism that can further advance the proposed mechanism and automate the separator/separation process for magazines of any width within a certain range.

[Object of the Invention] In view of the above, the present invention is capable of mounting a large number of identical magazines at any width within a certain range at once, and sequentially moving the mounted magazines to a delivery position with a shooter. The object of the present invention is to provide an automated set mechanism that is flexible with respect to the width of the magazine and that sequentially discharges the magazines and arranges them at appropriate positions after receiving and storing lead frames.

[Means for solving the problem] This invention provides a lead frame equipped with an IC chip,
A magazine mounting table on which a plurality of magazines of any size within a certain range that can be inserted in the horizontal X-axis direction and stored in multiple stages are placed in parallel in the Y-axis direction; A pressing mechanism that presses the placed magazine in the Y-axis direction and pushes it into a magazine receiver provided at the other end of the mounting table, and a Yldl moving mechanism that moves the magazine receiver to a pushing position corresponding to the width of the magazine. are provided on a common base. A vertical movement mechanism for vertically moving the magazine holder is fixed to the mover of the Y-axis movement mechanism, and a lead frame is mounted at a constant height and facing the magazine holder in the X-axis direction. It is constructed by providing an ejection mechanism that receives a lead frame ejected from a transport chute and ejects the stored magazine in the )' axial direction, and an ejection table that arranges the ejected magazines.

An air compressor that presses the magazine receiver and discharges the magazine is fixed to the mover of the vertical movement mechanism.
Furthermore, a magazine receiver is attached to the tip of the air pusher so as to be movable in the vertical direction with a vertical sliding mechanism interposed therebetween. Further, a clamp mechanism consisting of an air cylinder and a presser element is provided at the upper end of the magazine receiver to press and fix the magazine of the magazine receiver vertically downward.

Next, the width of the bottom surface of the magazine receiver in the Y-axis direction is set to be smaller than the minimum width in the Y-axis direction of the magazine placed on the magazine mounting table.

The magazine mounting table is provided with a cutout portion that is pressed by the button so that the bottom surface of the magazine receiver contacts and fixes the magazine.

[Operation] In the lead frame/magazine flexible setting mechanism according to the present invention, identical magazines having an arbitrary width within a certain range placed on the magazine mounting table are pressed from one end and moved to the magazine receiver. It is pushed in and fixed by a clamp mechanism. The magazine receiver is raised by the vertical movement mechanism to a position where the lead frame is delivered to the shooter, and the lead frame is delivered. After the transfer is completed, the magazine receiver is further raised to the height of the ejection table, the magazine receiver is pushed up to the ejection table by the air pusher, the clamp is released, and the magazine is ejected to the ejection table. In the above, for magazines of different widths, the entire vertical movement mechanism is moved by the Y-axis movement mechanism, and the position of the magazine receiver is adjusted so that the center line of the magazine in the Y-axis direction coincides with the center line of the shooter. This is preset, and this allows magazines of arbitrary widths to be handled.

Further, the bottom surface of the magazine receiver is made smaller than the minimum width of the magazine to be handled, so that it is flexible with respect to the width of the magazine. However, since the width of the bottom surface of the magazine receiver is small, it is necessary to fix the magazine to the magazine receiver, and the magazine is securely fixed by the clamp mechanism, the vertical sliding mechanism, and the notch in the magazine mounting table. After storing the lead frame, the magazine is ejected to the ejection table by an air pusher.

[Example] No. 11J is "Lead frame/magazine setting mechanism" according to the above patent application as a prior art for the lead frame/magazine flexible setting mechanism of the present invention.
The outline will be explained with reference to the structural diagram of the embodiment.

In the figure, there is a side plate on the base board 4! 3 is erected and a magazine mounting table 12 is supported thereon so as to be movable in the Y-axis direction. The mounting table 12 is pulled out to the left in the figure, and a plurality of magazines 2 are mounted thereon. The base board 4 is provided with a screw I4 that is rotated by a motor 15, and a slider 16 that is attached to the bottom of the screw I4 is rotated by a motor 15.
A press [17] is attached to press the magazine 2 minutes in the direction of the arrow. The right end of the magazine 2 pressed by the pressing plate I7 is pushed into the magazine receiver 18 on the right side of the mounting table 12 and is supported. On the other hand, a support column 4a fixed to the base plate 4 has a screw 5 rotated by a motor 9.
A vertical movement mechanism including a mover 5a is provided.

The magazine receiver +8 described above is fixed to the slider 5a, and the magazine receiver 18 is raised by the slider 5a. A shooter 3 for transporting the lead frame 1 is provided at a position facing the magazine receiver 18 in the X-axis direction and at a constant height.
It rises by a pitch interval of 2a to receive and store the lead frames 1 discharged from the chute 3 one by one, and when finished, it rises further and reaches the discharge stage 2! Stop at the position. Air pusher 19 attached to mover 5a
As a result, the magazine 2 is pushed in the direction of the arrow E and is ejected onto the ejection table 21. The shooter 3 and the magazine 2 have a specific width, and the magazine receiver is placed so that their center lines coincide. 18 in the Y-axis direction.

Now, as mentioned above, there are also various magazines 2 for lead frames 1 of various widths.

In order to convey lead frames of different widths, the chute 3 is changed, but in that case, it is necessary to move the chute 3 or the magazine receiver +8 in order to match the center lines. It is. However, both of these movements are difficult, and in addition to this, since the width of the bottom of the magazine holder is constant, in the case of a magazine with a smaller width, part of the next magazine will be moved into the magazine holder. This setting mechanism completely lacks the ability to handle magazines of various widths, such as the magazine holder being unable to stably support magazines of large widths. Therefore, in this invention, we added a function to the above-mentioned setting mechanism to make it flexible according to the width of the magazine! ! It is a structure.

Figures 2, 3 (a) and (b) are according to this invention.
FIG. 2 is a structural diagram of the main parts related to the FI function added to the mechanism of FIG. 1 in an embodiment of the lead frame magazine next to the flexible separator/sorter. Note that components having the same functions and actions as those in FIG. 1 are indicated using the same reference symbols in FIGS. 2 and 3 (a) and <b).

In FIG. 2, a Y-axis moving mechanism 23 consisting of a screw 23a rotated by a motor 22 and a slider 23b is mounted on the base plate 4.
A support column 4a is fixed to the mover 23b, and a vertical movement mechanism 24 consisting of a rod 5 rotated by a motor 9 and the mover 5a is attached to this.

An air shaft 19 is fixed to the mover 5a, and a magazine receiver 26 is attached to the tip of the movable rod 19a with a vertical sliding mechanism 25 interposed therebetween. Magazine holder 2
6 is in the shape shown in the figure, and the length W of its base is smaller than the minimum width W of the bottom of the magazines to be handled,
This W is the lower limit of the width of the magazine to be handled. On the other hand, the upper limit of the width can be handled up to several times the width of W, so that it can be compatible with various magazines currently in use and is flexible with respect to the width of the magazine.

Next, an air cylinder 2 is installed at the upper end of the magazine receiver 26.
A clamp mechanism 27 consisting of a pusher 7a and a presser 27b is provided. FIG. 3(a) explains the fixing operation of the magazine 2 by the clamp mechanism 27. (() shows the state in which the magazine 2 is pushed into the magazine receiver 26, and the air cylinder 27a operates here to press the magazine 2. When the child 27b presses the top of the magazine 2, the magazine receiver 26 lifts up as shown by the arrow H (+7) due to the reaction and its bottom surface 26a
comes into contact with the bottom surface 2b of the magazine, and the magazine 2 is further fixed by the pressing force of the presser 27b. This lifting operation of the magazine receiver 26 is performed by the slider 25 of the sliding mechanism 25.
This is done smoothly by moving a relative to the stator 25b. In addition, the magazine mounting table 12 is provided with a notch 12. shown in FIG. A is provided.

Now, with respect to the width of magazine 2, center II of magazine 2
Positioning is performed by moving the magazine receiver 26 in advance by the Y-axis moving mechanism 23 so that the center III' of the shooter 3 coincides with the center III' of the shooter 3. With the center lines aligned in this way, the magazine receiver 2 that comes into contact with the side of the magazine 2
Position 6 is the position into which the magazine 2 is inserted. ``At this position, the magazine receiver 26 is repeatedly raised and stopped by the vertical movement mechanism 24, so that the lead frame 1 discharged from the shooter 3 can be received and reliably stored in the magazine 2. After storing, when the magazine 2 rises further and stops at the height of the ejection table 21, the magazine receiver 26 is pushed to the left by the air pusher 19, and the magazine 2 is moved to the ejection table 2.
The magazine 2 is placed on the ejection table 21 by overlapping the right end of the magazine 1 and then releasing the clamp mechanism 27. The release in this case is the reverse operation of the fixation described above, and the ejection table 21 is provided with a cutout similar to the mounting table 12. Note that, in FIG. 3, mechanisms necessary to stabilize the movement of the support column 4a are omitted.

To summarize the above and explain the overall operation, the center lines of the magazine 2 and the shooter 3 are aligned in advance by the Y-axis moving mechanism 23 with respect to the width of the magazine 2 to be handled. When a plurality of magazines 2 are placed on the magazine mounting table 12, the magazines 2 pressed by the pressing plate 17 are pushed into the magazine receiver 26, fixed by the clamp mechanism 27, and raised by the vertical movement mechanism 24. The lead frame 1 is stored by repeatedly rising and stopping at the position of the shooter 3. After storage, the magazine 2 rises further and stops at the height of the ejection table 2I, and the magazine receiver 26 is pushed out by the air pusher 19, and the magazine 2 is moved to the ejection table 21.
The magazine 2 is placed on the ejection table 21 by releasing the clamp mechanism 27. When the next magazine arrives by a similar operation, the previous magazine is pushed and moved and arranged naturally. Note that automatic control of each part of one or more mechanisms can be easily implemented using conventional control techniques.

[Effects of the Invention] As is clear from the above explanation, the lead frame/magazine flexible setting mechanism according to the present invention allows multiple magazines to be placed at once, and the subsequent magazine setting work is automated and labor-saving. Furthermore, it is highly flexible so that it can handle a wide range of magazine widths, and can be applied to lead frame processing lines that require large-volume and rapid processing, allowing it to process various magazines. There are great effects that can be handled freely.

[Brief explanation of the drawing]

FIG. 1 shows a "lead frame/magazine setting mechanism" according to a patent application as a prior art for the lead frame/magazine flexible setting/sorting mechanism according to the present invention.
Figure 2 shows the structure of the lead frame according to the present invention.
3(a) and 3(b) are partial detailed views of FIG. 2; FIG. 4 is a diagram showing an example of a lead frame;
FIG. 5 is an explanatory diagram of the delivery of the lead frame between the shooter and the magazine, and FIG. 6 is a perspective view showing the structure of a conventional magazine setting mechanism. 1...Lead frame, 1a--Lead, 1b
...Frame Island (commonly known as Tab), 1c...I
C chip, 2...Magazine, 21--Magazine shelf, 2b...Bottom of magazine, 3--Shooter, 4--Base board, 4a, 20.・-Support column, 5.14.23a-Screw, 5a, 6a
, 16, 23% --- Mover, 6--Slide rod, 7--Connecting rod, 8--1 magazine mounting plate,
9.10.15.22. -...Motor, lOa = lever, ■...Magazine holder, 12...Magazine mounting stand, 13...Side plate, 17...Press plate, lOa...Magazine holder, 19...- Air pusher, 19a...Movable rod, 21...-Discharge table, 23...-Y-axis movement mechanism, 24...Vertical movement mechanism, 25--Vertical sliding mechanism, 25a...Slider, 25b...Stator, 26...-Magazine holder, 26a...Bottom surface of magazine holder, 27...Clamp mechanism, 27a...Air cylinder, 27b...-
presser.

Claims (5)

[Claims] (1) A plurality of lead frame magazines (hereinafter simply referred to as magazines) of any size within a certain range that can store lead frames loaded with IC chips in multiple stages by inserting them in the horizontal X-axis direction. , a magazine mounting table placed in parallel in the Y-axis direction, and a magazine receiver provided at the other end of the magazine placing table by pressing the mounted magazine in the Y-axis direction from one end of the magazine placing table. A pressing mechanism for pushing the magazine into the magazine, and a Y-axis moving mechanism for moving the magazine receiver to a pushing position corresponding to the width of the magazine are provided on a common base plate, respectively, and a mover of the Y-axis moving mechanism is provided. The vertical movement mechanism that moves the magazine receiver vertically is fixed, and the vertical movement mechanism that moves the magazine receiver in the vertical direction is fixed, and the
An ejection mechanism that receives lead frames ejected from shooters that are arranged to face each other in the axial direction and ejects the stored magazines in the Y-axis direction, and an ejection table that arranges the ejected magazines. A flexible set mechanism for a lead frame/magazine, which is characterized in that it is configured by: (2) An air pusher that presses the magazine receiver in the Y-axis direction and discharges the magazine from the magazine receiver is fixed to the mover of the vertical movement mechanism, and the tip of the air pusher is attached in the vertical direction. 2. The lead frame/magazine flexible setting mechanism according to claim 1, wherein the magazine holder is mounted movably in a vertical direction via a sliding mechanism. (3) The lead according to claim 1, further comprising a clamping mechanism, which includes an air cylinder and a presser, at the upper end of the magazine receiver and presses the magazine vertically downward and fixes it to the magazine receiver. Flexible frame and magazine set mechanism. (4) Y of the magazine placed on the magazine mounting table above
The lead frame magazine flexible set mechanism according to claim 1, wherein the magazine receiver has a bottom width in the Y-axis direction that is smaller than the minimum width in the axial direction. (5) The lead frame/magazine flexible setting mechanism according to claim 1, wherein the magazine mounting table is provided with a notch that allows the magazine to be fixed by the clamp mechanism.