JPS646883B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and an apparatus for separating a multi-thread metal strip having intricate portions in the width direction, and more specifically to a method and apparatus for separating a multi-thread metal strip having an intricate part in the width direction. A multi-thread metal strip having an intricate part in the width direction that can efficiently separate a lead frame strip formed into two interconnected lead frame strips with intricate leads from both sides without entangling the lead parts. This invention relates to a separation method and apparatus.

(Prior art and its problems) In recent years, the press working of lead frames has become more multi-striped. For example, as shown in FIG. It is connected at the tip. In order to separate such lead frame strips, after cutting the connecting part at the tip of the lead part 12 with an appropriate cutting device,
Separation can be easily achieved by arranging the separation plate 14 at the center in the feeding direction. However, in order to save on materials, the comb-shaped lead portions 16 may be formed into two connected lead frame strips by intertwining with each other, as shown in FIG. In this case, after cutting the connecting portion 18, the lead portions 16 must be separated in a direction perpendicular to each other's planes to avoid tangling.
As shown in Figure b, the separating plate 1 is placed in the direction perpendicular to the feeding direction.
4', the separation plate 14' itself becomes the lead part 1.
There is a problem that it cannot be separated properly because it gets tangled with 6. Particularly, a lead portion 16 having a step as shown in FIG. 3C is more likely to become entangled.

The present invention has been made to solve the above-mentioned problems, and its purpose is to reliably separate lead frames in the width direction, even when the lead frame has a complicated shape. An object of the present invention is to provide a method and apparatus for separating a multi-thread metal strip having assembled parts.

(Means for Solving the Problems) In the present invention according to the above-mentioned object, a metal strip made of a magnetic material formed by connecting multiple strips so as to have an intricate portion in the width direction is formed, and the connecting portion between the strips is In a metal strip separation method in which each strip is cut at predetermined intervals in the longitudinal direction and separated by forming into strips, the metal strip is cut at a constant pitch from one end side using an appropriate cutting device. When cutting each strip into strips at predetermined intervals in the longitudinal direction, the connecting portions are cut and sent out in the forward direction of the cutting device. One end of every other strip among the strips is attracted by a magnet against gravity, and the adjacent strips and their surfaces are separated in a direction in which they are separated from each other, while being attracted by the magnet. It is characterized by being cut into strips.

(Operation) The connecting portion between the strips is cut and one end portion of every other strip sent out in the forward direction of the cutting device is attracted by the magnet against gravity and becomes adjacent to the strip. The strips and their surfaces are separated in the direction of separation and are cut into strips while being attracted by the magnet. In other words, one end of each strip is cut into strips while the strips are still connected. Since the strips are separated by suction and cut into strips, they do not shift forward, backward, left or right, and even complex metal strips like lead frames can be reliably separated without getting tangled.

(Embodiments) Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 3, reference numeral 20 denotes an auto-reel, which reelably winds a metal strip 22 formed on two lead frames to be separated as shown in FIG. 2.

24 is a feeding device, and an auto reel 20
The metal strip 22 unwound from the press 26 is intermittently fed into a press 26 at a predetermined pitch. Feeding device 2
4, for example, by engaging feed claws (not shown) in feed holes 30 (see FIG. 2) provided at regular intervals in the frame parts 28a, 28b on both sides of the metal strip 22, Various methods can be adopted, such as a device in which the material is fed by a feed roller (not shown) or a device in which the material is fed by a feed roller (not shown).

The press machine 26 operates in synchronization with the feeding device 24, and while cutting the connecting portion 18 of the metal strip 22 fed by the feeding device 24, a predetermined plurality of unit lead frames are connected at a constant cycle. Cut into vine-like sheets. While the connecting portion 18 is being cut, the seed frame strip sheet is separated into upper and lower parts by a carry-out conveyor, which is a carry-out device described below, and is conveyed at the same time as the sheet-like cutting is completed.

32 is a carry-out conveyor, which is installed following the press machine 26. 34 is also an output conveyor, and is arranged above the above-mentioned output conveyor 32 so that one end on the press machine 26 side is close to the lower output conveyor 32 and the other end is inclined so as to be away from the output conveyor 32. has been done. Note that FIGS. 4 and 5 are detailed views of the discharge conveyor portion. 36
a and 36b are rotating rollers of the carry-out conveyor 32, and are rotatably supported by appropriate members (not shown). Further, 38 is the conveyor belt. 4
0a and 40b are rotating rollers of the carry-out conveyor 34, which are rotatably supported by appropriate members (not shown). Further, 42 is the conveyor belt. 44
4 is a gear coaxially fixed to the rotating roller 36a;
A gear 6 is coaxially fixed to the rotating roller 40a and meshes with the gear 44, and the number of teeth of the gear 46 is set to be slightly larger than the number of teeth of the gear 44.
The unloading speed of the lower unloading conveyor 32 is set to be slightly higher.

Reference numeral 48 denotes a guide member having a substantially arcuate curved surface, which is disposed between the press machine 26 and the carry-out conveyor 34, and whose one end on the press machine 26 side has two leads cut by the press machine 26. The frame portion 28a of one of the frame strips faces downward, and the other end is the conveyor belt 4 of the discharge conveyor 34.
2, and feeds one lead frame strip onto the conveyor belt 42 of the carry-out conveyor 34 by contacting and guiding the lower surface of the frame portion 28a of the one lead frame strip. be. A magnet 50 is provided over a predetermined length from near the end of the guide member 48 in contact with the conveyor belt 42 of the carry-out conveyor 34. The lead frame strip is suctioned and a predetermined plurality of unit lead frames are cut into a connected sheet shape and simultaneously conveyed by the conveyor belt 42.

49 is also a guide member, and press machine 26
and the lower discharge conveyor 32, one end on the press machine 26 side faces above the frame portion 28b of the other cut lead frame strip, and the other end faces the conveyor belt 3 of the discharge conveyor 32.
8, and in the same way as above, by contacting and guiding the upper surface of the frame portion 28b of the other lead frame strip, the other lead frame strip is transferred to the conveyor belt 38 of the delivery conveyor 32.
send it to the top. A magnet 52 is also disposed over a predetermined length on the lower surface of the conveyor belt 38 of the carry-out conveyor 32, so that it can attract the other fed lead frame strip and convey it at the same time as the sheet-like cutting is completed. ing.

54 is the magnet 5 of the above-mentioned delivery conveyor 34
This is a transfer conveyor provided outward from near the bottom of the zero end.

56 is a receiving container provided at the terminal end of the transfer conveyor 54, and 58 is a receiving container provided at the terminal end of the carry-out conveyor 32.

Since the present invention is configured as described above, the two lead frame strips whose connecting portions have been cut by the press 26 are first separated by the guide members 48 and 48, respectively.
49 in the vertical direction. Immediately after each lead frame strip is guided, it is attracted by the corresponding magnets 50 and 52, and then cut into sheets in which a plurality of unit lead frames are connected, so that they can be separated reliably. Then, one lead frame strip is transferred to the unloading conveyor 3.
4. The lead frame strips are transported by the transfer conveyor 54 and stored in a receiving container 56 in a stacked manner, and the other lead frame strip is transported by the carry-out conveyor 32 and stored in a receiving container 58 in a stacked manner. The Rukoto.

It should be noted that since the delivery speed of the delivery conveyor 32 is set to be slightly higher than that of the delivery conveyor 34, the opposing intricate blade-shaped lead portions 16 shown in FIG. The separation has become even more secure. Depending on the shape of the lead frame, the delivery speeds of the upper and lower delivery conveyors may be set to be the same or opposite to the above.

Further, the following modifications are possible in the present invention. That is, (1) the magnet 52 of the lower delivery conveyor 32 is not necessarily required, and the lead frame strip is conveyed in close contact with the conveyor belt 38 due to its own weight.

(2) The lower delivery conveyor 32 itself is not necessarily required, and a receiving container 58 is provided close to the press machine 26 to receive the cut lead frame strip by falling under its own weight.

In addition, separation is possible without providing the guide member 49.

(3) The feeding direction of the metal strip 22 can also be arbitrarily selected, such as so that the surface portion thereof is in the vertical plane. In this case, it goes without saying that the feed device 24, press machine 26, discharge conveyor, etc. are spatially arranged accordingly.

(4) Further, the metal strip 22 is not limited to two strips, but may be three or more strips. In this case, various modifications are possible, such as all the lead frame strips being attracted by magnets and separated and conveyed, or every other lead frame strip being attracted by magnets and separated and conveyed, and the others being allowed to fall naturally and stored.

In the present invention, one end of every other strip is attracted by a magnet against gravity to separate the adjacent strips and their surfaces in a direction that separates them from each other. This includes all of the above aspects. That is, one end of every other strip may be similarly attracted by a magnet, may simply be placed along the delivery conveyor, or may be allowed to hang down due to its own weight.

FIG. 6 shows another embodiment.

In this embodiment, instead of guiding the lead frame strip by the guide members 48 and 49 as in the previous embodiment, the lead frame strips are guided by the respective discharge conveyors 60 and 49.
By the magnets 64 and 66 arranged at 62,
The lead frame strip after the connection is cut is directly sucked and separated. In this case, the magnets 64 and 66 are preferably arranged so as to attract the frame portions 28a and 28b of the lead frame strips, respectively, so as not to attract each other's lead frame strips. Although the guide members 48 and 49 are not necessary in this embodiment, they may be formed short and provided as a presser.

This embodiment also provides the same effects as described above. Further, the modifications of (1) to (4) above can be performed in the same manner.

In each of the above embodiments, a lead frame is used as an example of a multi-thread metal strip, but it is needless to say that the present invention is not limited to this. For example, the present invention can also be applied to separating a connector frame in which a large number of connectors are connected. .

(Effects of the Invention) According to the present invention, one end side of every other strip, which is sent out in the forward direction of the cutting device after the connecting portion between the strips is cut, is subjected to gravity by the magnet. The adjacent strips and their surfaces are separated in the direction of separation by being attracted against each other, and are also cut into strips while being attracted by the magnet. In other words, while each strip is still connected, One end of each strip is separated by magnets and cut into strips, so it does not shift forward, backward, left or right, and even with complex metal strips like lead frames, they do not get tangled. Can be reliably separated.

[Brief explanation of the drawing]

FIGS. 1 and 2 are explanatory diagrams each showing a metal strip formed by connecting two lead frame strips. 3 to 5 show a preferred embodiment of the lead frame separation device according to the present invention, FIG. 3 is an overall explanatory diagram thereof, FIG. 4 is a plan view of the main part, and FIG. 5 is a main part. FIG. FIG. 6 is an explanatory diagram showing another embodiment. 10a, 10b...Lead frame, 12...
Lead part, 14, 14'... Separation plate, 16... Lead part, 18... Connection part, 20... Auto reel, 22... Metal strip, 24... Feeding device,
26...Press machine, 28a, 28b...Frame portion, 30...Feeding hole, 32, 34...Export conveyor, 36a, 36b...Rotating roller, 38...Conveyor belt, 40a, 40b...Rotating roller,
42... Conveyor belt, 44, 46... Gear,
48, 49... Guide member, 50, 52... Magnet, 54... Transfer conveyor, 56, 58...
Receiving container, 60, 62... Carrying out conveyor, 64,
66...Magnet.

Claims (1)

[Scope of Claims] 1. A metal strip made of a magnetic material formed by connecting multiple strips so as to have interlocking portions in the width direction is cut at the connecting portion between the strips, and each strip is cut in the longitudinal direction. In a method for separating metal strips in which the metal strips are cut at predetermined intervals to form strips and separated, the metal strips are fed into a suitable cutting device from one end at a constant pitch to separate the connecting portions between the strips. When cutting each strip into strips at predetermined intervals in the longitudinal direction, every other strip is cut at the connecting portion and sent out in the forward direction of the cutting device. One end side portion is attracted by a magnet against gravity to separate the adjacent strips and their surfaces in a direction that separates them from each other, and the strip is cut into strips while being attracted by the magnet. A method for separating a multi-thread metal strip having a convoluted portion in the width direction. 2 A metal strip made of a magnetic material formed by connecting multiple strips so as to have an intricate portion in the width direction is cut at the connecting portion between the strips, and each strip is cut at a predetermined interval in the longitudinal direction. A separating device for metal strips in which the metal strips are formed into strips and separated, comprising: a feeding device that sequentially feeds the metal strips from one end at a constant pitch; a cutting device that cuts the connecting portion between the metal strips and cuts each strip at predetermined intervals in the longitudinal direction to form strip-shaped pieces; The connecting portion is cut by the holder, and one end of every other strip is sucked against gravity, and the adjacent strips are separated in the direction in which their surfaces are separated from each other. a conveyor belt, which is equipped with a magnet inside the conveyor belt, and an output conveyor that conveys the strip-shaped piece cut by the cutting device by the conveyor belt while one end side is attracted by the magnet. Separation device for multi-thread metal strips having an intricate part.