JPS5916360Y2 - Magazine support device in lead frame supply and reception device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a magazine support device in a lead frame supplying and receiving device.

For example, as shown in Figure 1, a lead frame used to make a semiconductor container has a pellet opening 1 that connects to a pad at the pellet pedestal opening (this work is called pellet bonding work). Precise work such as connecting the terminals placed around the mouth and the pads with gold wire (this work is called wire bonding work) is carried out, but these works are carried out when the intermittent transfer is stopped. .

Conventionally, for this purpose, several lead frames are connected to form a ribbon shape as shown in FIG. 1, and a plurality of lead frames are loaded in several stages into a magazine E as shown in FIG. 2 (A).

As shown in Figure 2 (B), the magazine E has grooves at a constant pitch n (the height of the magazine tiers) on the opposing inner walls in which a ribbon-shaped frame can be freely inserted and removed. A notch d is provided in C, and the intermittent transfer device D [second (See Figure (B))] is raised and hooked, the lead frame is pulled out one by one, and when the intermittent transfer is stopped, the above pellet bonding work and wire pump This allows the magazine to be transferred to a magazine E' having the same structure as the magazine E, which is also provided on the opposite side.

However, such a device requires one magazine on each of the supply side and the receiving side of the ribbon-shaped frame.
The feeding and receiving of ribbon-shaped frames is completed immediately, and the magazine has to be replaced frequently.

This idea involves installing multiple magazines at regular intervals on both the supply side and the receiving side, and when the lead frame in one magazine becomes empty or is filled with another magazine, the next magazine is loaded. automatically move to the working position one after another, making it possible to process lead frames continuously and efficiently without frequently replacing the magazine, and also making it possible to supply lead frames smoothly.
It is an object of the present invention to provide a magazine support device in a lead frame supplying and receiving device.

The structure of this invention will be explained in detail based on the embodiment shown in FIGS. 3 to 7. An unprocessed lead frame supply stand A and a processed lead frame receiving stand B are provided in the form of a rotary table, and each magazine is They are arranged radially on the table.

To explain the structure now, in this embodiment, a lead frame processing place C is provided between an unprocessed lead frame supply table A and a processed lead frame receiving table B, and a lead frame processing place C is provided between the supply table A and the processed lead frame receiving table B. The structure is equipped with an intermittent article transfer device.

Since the supply table A and the receiving table B in this embodiment have almost the same configuration, the configuration of the circular table type unprocessed lead frame supply table A will be described in some detail.

As shown in FIG. 4, a housing 4 with a hollow shaft 3 fixedly erected is provided on a housing 2 provided on a machine base 1, and a mantle 5 is rotatably attached to the outer periphery of the hollow shaft 3. The lower end of the mantle 5 is formed into an index disk 6, and on the lower surface of the disk 6, a number of cam followers 7 are vertically disposed circularly and at the same pitch around the center of the hollow shaft 3. A cylindrical cam 8 with which the cylindrical cams 7 and 7 mesh is mounted horizontally on the housing 4, and is rotated by a motor 9 provided on the housing 2 at a reduced speed via gears 10 and 11. is the boss 13 of the circular table 12
is fixed with the key 14.

The circular table 12 is provided with a plurality of through holes 15 radially at the same pitch, and magazine holding frames 16 and 17 are provided on the outer and inner edges of each through hole 15, respectively.
Magazine E during 6.17.

1, En2! (See Figure 3).

Magazine E.

The configuration of 19 En2-m= is exactly the same as the conventional one, so a detailed explanation will be omitted.

The upper end of the hollow shaft 3 is provided with an extrusion device mount 18 for a ribbon-shaped frame in the magazine En.

As shown in FIG. 5, the mounting base 18 has two sliding rods 1.
9 and 20 are provided parallel to the diametrical direction O-O of the circular table 12, a ribbon-shaped frame push plate 21 is provided at one end of both sliding rods, and a push plate 21 is provided at the other end of the sliding rod. 7th
As shown in the figure, a bell crank 26 is provided with bearings 22, 22 and connected by a connecting rod 23, and is pivotally supported by pins 25 on bearing pieces 24, 24 provided on both sides of the mounting base 18 on the connecting rod 23. The other end 26'' of the bell crank 26 is engaged with the yoke portion 26' at one end (see FIGS. 3 and 7), and the other end 26'' is connected to the upper end of an elevating rod 27 provided in the hollow shaft 3 so as to be movable up and down. The lower end of the lifting rod 27 is connected midway on the free end 29' side of a swinging rod 29, one end of which is pivoted to a shaft bearing piece 28 provided separately on the machine base 1.A cam follower roller 30 is attached to the swinging rod 29. The shaft is mounted on a shaft.

A shaft 33 is supported on two bearings 31 and 32 installed on the machine base 1, and at one end of the shaft 33 there is a cam 34 for a lifting platform, and at the other end there is a disk R1 having slits at a constant pitch on the outer periphery. Separately, motor 3 was installed on Kokichi 35, which was further erected on machine stand 1.
A gear 38 meshed with a small gear 37 of a rotating shaft 6 and a lifting cam 39 of the lifting rod 27 are fixed, and the cam follower roller 30 abuts on the lifting cam 39.

A magazine lifting table guide frame 4° is provided protruding from the housing 4 so as to guide the support rod 42 of the magazine lifting table 41 which can be moved in and out of the through hole 15 provided in the circular table 12. The lower end of the rod 42 is a bearing piece 4 erected on the Kokichi 35.
connected to the free end of a swinging lever 45, one end of which is pivoted to 3;
A follower roller 46 that contacts the lifting table cam 34 for raising and lowering the magazine is mounted on the swing lever 45.

In FIG. 6, reference numeral 47 indicates a spring that presses the cam follower roller 30 against the elevating cam 39, and 48 indicates a spring that presses the cam follower roller 46 against the elevating platform cam 34.

Since this circular table-type unprocessed lead frame supply table A has the above-mentioned configuration, a magazine En is installed between the magazine holding frames 16 and 17 on the circular table 12, and the magazine En is arranged opposite to the lead frame intermittent transfer device. En,
When the motor 36 is started from a position where it is placed on the magazine lifting table 41 which has risen to the highest position, the shaft 33 rotates, the lifting cam 39, the lifting table cam 94, and the disk R1 rotate, and the cam 39 rotates. The lifting rod 27, bell crank 26,
The sliding rods 19 and 20 operate to push out the push plate 21, enter the magazine En held by the magazine holding frames 17 and 18, and remove all the ribbon-shaped frames in the magazine En (see Fig. 3). ), and the push plate 21 is the lifting cam 3.
It returns to its original state with the action of 9.

Next, when all the ribbon-shaped lead frames are pushed out by X, the sensor S1 installed near the extraction side of the intermittent transfer device detects the presence or absence of the ribbon-shaped lead frame, The reciprocating sliding frame 4 of the intermittent transfer device shown in FIG.
8 as shown in the figure f in the figure, one of the feed claws 49 provided at both ends is inserted into the through hole of the ribbon-shaped frame, and the ribbon-shaped frame is extracted. and then the magazine lifting platform 41
is lowered and the next ribbon-shaped frame is taken out. This operation is repeated one after another until all the ribbons are fed out of the magazine En, and the motor 9 is activated to rotate the cylindrical cam 8 and divide the circular table 12 into parts.

This operation is repeated thereafter. Incidentally, since the intermittent transfer device is a commonly used one, its explanation will be omitted.

On the other hand, near the entrance of the lead frame processing plant C, a sensor S2 that detects the presence or absence of a ribbon-shaped lead frame sends a signal to the processed material when the ribbon-shaped lead frame is "present", and a signal is sent when it is "absent". do not send.

Then, the processing section is activated by the "presence" signal, and performs bonding work of the pad and gold wire on the lead frame.

When this bonding work is completed, the processed lead frame receipt B is sent to the ribbon-shaped lead frame I by the intermittent transfer device similar to the front hole.

In this receiving table B, the magazine En is at the lowest position, and is successively raised by the magazine elevating table 41 to receive the ribbon-shaped frames.

Next, the operation of the processed lead frame receiving stand B will be explained. Since the pushing plate 21 is not necessary in the receiving stand B, its related mechanism is not provided.

Although the operating order is substantially the same as that on the supply stand A side, only the differences will be briefly explained.

That is, a sensor S3 that detects the presence or absence of a processed ribbon-shaped lead frame is provided near the receiving side of the magazine E'n, and this sensor S3 detects the presence or absence of a processed ribbon-shaped lead frame until the first processed ribbon-shaped lead frame is carried to the detection component. It is designed not to be sensitive to the detection of "absence" of the lead frame, and becomes sensitive only when the ribbon-like lead frame is transported by the lead frame intermittent transfer device, detects "presence", and then detects "absence". When "absence" is detected for the second time, the magazine E'n is raised by one step by the magazine lifting table 41.

This device has the above-mentioned structure and function, so the work can be carried out sequentially and continuously by rotating the table on which the magazine is placed intermittently.Moreover, it has a push-out mechanism on the supply side of the lead frame. Lead frames can be supplied smoothly.

[Brief explanation of the drawing]

The figure shows one embodiment of the magazine support device in the lead frame supply/receiver device according to this invention.
The figure is an explanatory diagram of the ribbon-shaped lead frame, Figure 2 (A) is a perspective view of the magazine, Figure 2 (B) is its longitudinal sectional view, and Figure 2 (B) is a perspective view of the magazine.
Figure (C) is its side view, Figure 2 (D) is its bottom view, Figure 3 is a conceptual diagram showing the relationship between each device in one embodiment, and Figure 4 is a front view with a part of the supply table cut away. 5 is a partially cutaway plan view, FIG. 6 is a side view, and FIG. 7 is a plan view showing the relationship between the bell crank and the sliding rod. E...Magazine, A...Lead frame, n...Magazine step height, 12...
...Table, 15...Through hole, 16,17...
... Magazine holding frame, 21 ... Push plate, 41
・・・・・・Magazine lifting platform.

Claims (1)

[Scope of utility model registration request] A lead frame in which a table that rotates intermittently is provided on the supply side and a receiving side of the lead frame, respectively, and a plurality of magazines capable of storing the lead frame in multiple stages are provided at the same pitch in the circumferential direction of the table. In the magazine support device in the supply and receiving device, the table is provided with a plurality of through holes radially arranged at the same pitch, a holding frame for the magazine is provided for each through hole, and a frame is provided below one of the through holes. is provided with a magazine lifting platform that is moved up and down intermittently at intervals n corresponding to the heights of the magazine stages;
Supplying lead frames, characterized in that the supply side of the lead frames is provided with an extrusion mechanism that pushes out all the lead frames stored in the magazine on the table facing the lead frame transfer path by a fixed distance X; A magazine support device in a receiving device.