JPH06338582A - Aligning and transferring apparatus for ic lead frame - Google Patents

Abstract

PURPOSE:To adjust the transfer position quickly and accurately without deformation even if an IC lead frame is very thin and a lead wire is made thin. CONSTITUTION:A plurality of the sets of transfer rollers 11 are arranged for holding members (21L and 21R) in the position-deviated pattern so that the rollers face in such a way each that equal-diameter part 12 is located inside and each taper part 13 approaches the direction of a transfer central axis line 9 when the taper part 13 goes to the downstream side of the transfer direction. A relative-position detecting device detects the fact that the relative distance between a pair of the holding members (21L and 21R), whose positions are adjusted with a position adjusting means 31, with the transfer central line 9 as the center becomes the preset distance in this constitution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IC lead frame alignment transfer device for transferring an IC lead frame while aligning it with a transfer center axis.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional structure of an IC lead frame plating apparatus. In the figure, 1 is a pretreatment device, 3 is a plating treatment device, and 5 is a posttreatment device. The respective processing devices (1, 3, 5) are arranged in a line on the transport center axis line 9. The pretreatment device 1 includes a power supply member (not shown) and the like, and performs electrolytic degreasing, undercoat plating, activation, and the like on a metal IC lead frame. In addition, the plating device 3
Then, the surface of the IC lead frame is plated using a plating cell (not shown) or the like. Further, the post-processing device 5 performs collection and drying. Note that 11C is a roller conveyor that conveys the IC lead frame.

In the above plating apparatus, in order to perform the plating processing of the IC lead frame smoothly and with high quality, the processing execution parts (the above-mentioned power feeding member, the plating cell, etc.) of each processing apparatus are usually based on the transport center axis 9. Therefore, it is necessary to align the IC lead frame with the transport center axis 9 before reaching the processing execution component.

Therefore, usually, each processing device (1, 3,
One or two or more positioning and conveying devices are arranged on the upstream side of 5), and also in an appropriate middle part of each processing device (1, 3, 5).

As shown in FIG. 4, the conventional alignment transfer apparatus 10A sets a lower limit position for aligning the IC lead frame W with the transfer center axis 9 by each transfer roller 11 of the roller conveyor 11C, and A pair of swing levers 1
Each of the 7L and 17R claws 18 is configured to forcibly align the IC lead frame W with the conveyance center axis 9 while sandwiching both ends of the IC lead frame W.

More specifically, a plurality of transport rollers 11 are arranged at a predetermined height position with respect to the transport center axis 9 in the direction orthogonal to the paper surface in FIG. 4 (the transport direction indicated by arrow X in FIG. 3). They are held and arranged in rows at a predetermined pitch.

The swing levers 17L and 17R are rotatably supported by support shafts 17a and 17a provided at symmetrical positions with respect to the transport center axis 9. Also, FIG.
The reference numeral 19 designates a driving device for rotating the swinging arms 17L, 17R inwardly from the standby position shown by the solid line in the figure by the same angle amount. This standby position is symmetrical with respect to the center axis of conveyance 9, and the rocking levers 17L, 1L, 1 are arranged so that the position of the IC lead frame W can be corrected with certainty.
The distance between the claws 18 of 7R is set to be considerably larger than the width dimension of the IC lead frame W.

Therefore, the IC lead frame W is conveyed on each of the conveying rollers 11, and the swing lever 1 is moved at a predetermined position.
The 7L and 17R claws 18 can be aligned with the transport center axis 9 by restricting the positions in the width direction while sandwiching both side ends thereof. In this way, when the alignment is completed,
When the rocking levers 17L and 17R are returned to the standby position shown by the solid line in FIG. 4, the IC lead frame W is conveyed again on the conveyance central axis 9 from the state where the conveyance is stopped.

[0009]

However, in the above-described conventional structure, it is extremely difficult to positionally regulate both side ends of the IC lead frame W by the respective claws 18 of the rocking levers 17L and 17R. , 17R may not be sufficiently rotated and the both ends of the IC lead frame W may not be sandwiched between the claws 18, resulting in insufficient alignment, or the clamping force of the claws 18 may become too large, causing deformation. .

In particular, the IC lead frame W becomes extremely thin (thickness 0.07) in accordance with the miniaturization and high functionality of the IC.
(5 to 0.1 mm), the lead wire is becoming thinner and weaker in rigidity, so that even if the clamping force of each claw 18 becomes slightly larger than the set value, it will be deformed. It may happen that the product becomes defective.

Further, when the IC lead frame W is sandwiched by the rocking levers 17L and 17R and positioned, the conveyance is forcibly stopped, so that the IC lead frame W is rubbed against the rotating conveyance roller 11. Therefore, the IC lead frame W is easily scratched.

Therefore, the swing levers 17L, 17 have been conventionally used.
A main customer fall phenomenon occurs in which deformation and scratches are prevented even if the positioning is slightly sacrificed by reducing the clamping force of each R claw 18 or shortening the clamping time.

Further, from the viewpoint of improving the productivity of the IC lead frame W, it is required to improve the transportation efficiency (that is, to increase the speed). However, even if the IC lead frame W is momentarily transported, the transportation is stopped and alignment is performed. With the conventional structure, the continuous conveyance is hindered, and it is difficult to comply with the request for higher speed.

An object of the present invention is to provide an IC lead which can be continuously conveyed quickly and accurately while being aligned with the conveyance center axis line without being deformed even if the IC lead frame is extremely thin and the lead wire is thin. An object is to provide a frame alignment transport device.

[0015]

In the conventional structure in which the IC lead frame is aligned by applying an external force to both ends of the IC lead frame while the conveyance is stopped, deformation and scratches are prevented and accurate alignment is performed. However, based on the analysis that it is practically impossible to carry out smooth continuous transport, and that even if it is stopped for a moment, the current demand for higher speed cannot be met,
The present invention is formed so that the position of the IC lead frame itself is corrected as the IC lead frame is conveyed in association with the conveying roller.

That is, the IC lead frame alignment transfer device according to the present invention comprises a plurality of sets of transfer rollers each having an equal diameter portion and a taper portion having a small diameter on the side of the equal diameter portion and which is inclined to expand outward. A pair of holding members that extend in the carrying direction and are attached to both sides of the carrying center axis so as to be spaced apart from each other, and position adjusting means for adjusting the position of the pair of holding members so as to be symmetrical with respect to the carrying center axis. , A plurality of sets of conveying rollers are opposed to each holding member so that each equal-diameter portion is on the inner side, and each taper portion is displaced so as to approach the conveying central axis direction as it goes downstream in the conveying direction. Relative position detection means is provided for detecting that the relative distance between the pair of holding members position-adjusted by the position adjustment means about the transport center axis is a preset distance. To And butterflies.

[0017]

According to the present invention having the above-described structure, when the IC lead frame reaches the upstream side of the carrying roller, it is continuously carried on the equal-diameter portion of the carrying roller toward the downstream side.

At this time, when the IC lead frame is displaced with respect to the center axis of conveyance from the beginning (or as a result of meandering) and one end of the IC lead frame rides on the taper portion of the conveyance roller, the IC lead frame is The taper portion is pressed by its own weight in a direction substantially perpendicular to the surface thereof. Then, not only the rotational force from the taper portion but also the inward drag force acts on the IC lead frame. As a result, the IC lead frame
While being transported, it moves inward and corrects its position.

As described above, the IC lead frame is gradually moved toward the downstream in the transport direction by gradually performing the position correction as described above in association with the tapered portion of each transport roller so as to gradually shift the displacement amount with respect to the transport center axis line. The amount of misalignment decreases and the amount of positional deviation becomes zero on the downstream side in the transport direction, that is, the position is aligned with the transport center axis.

When the type of the IC lead frame is changed, the position adjusting means is used to adjust the position until the relative position detecting means detects that the relative distance between the pair of holding members reaches the set distance. Then, each of the conveying rollers facing each other is positioned at a position corresponding to the width dimension of the IC lead frame of the next type.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, this IC lead frame alignment transfer device includes a plurality of sets of transfer rollers 11 and a pair of holding members 21L and 2L that support the transfer rollers 11 so as to face each other.
1R, position adjusting means 31 for adjusting the positions of the holding members 21L, 21R, and relative position detecting means (41) for detecting the relative distance between the holding members 21L, 21R are included, and the form of the transport roller 11 is devised. The IC lead frame W itself corrects the position in the width direction, and the relative distance between the holding members 21L and 21R about the transport center axis 9 can be quickly and accurately adjusted to the set distance.
The ultra-thin and weakly rigid IC lead frame W is formed so that the conveyance position can be adjusted quickly and accurately without deformation.

First, the conveying roller 11 has a constant-diameter portion 12,
The equal-diameter portion 12 side is configured to have a small diameter and a taper portion 13 that is inclined toward the outside to expand its diameter. Further, the holding members 21L and 21R are mounted so as to extend in the carrying direction (direction of arrow X) and be spaced apart from and approach the carrying center axis 9 from both sides. Then, a plurality of sets of conveying rollers 11 are opposed to the holding members 21L and 21R so that the equal-diameter portions 12 are on the inner side, and the respective taper portions 13 are closer to the conveying central axis 9 direction toward the downstream side in the conveying direction. As described above, the positions are displaced.

With this configuration, the lower limit position of the IC lead frame W with respect to the center axis 9 of the conveyance is set by the equal-diameter portions 12 of the respective conveyance rollers 11 facing each other. Further, the IC lead frame W itself participates in the tapered portion 13 of each of the transport rollers 11 to correct the position in the width direction. That is, when the IC lead frame W is transported on the equal-diameter portion 12 of each of the transport rollers 11, the IC lead frame W is displaced with respect to the transport center axis 9 and one end of the IC lead frame W rides on the tapered portion 13 of the transport roller 11. Then, the taper portion 13 is pressed in a direction substantially perpendicular to the surface thereof. Then, in the IC lead frame W,
In addition to the rotational force from the taper portion 13, an inward drag force acts. As a result, the IC lead frame W moves inward while being conveyed and corrects its position.

As described above, the IC lead frame W is involved in the taper portion 13 of each of the carrying rollers 11 as it goes downstream in the carrying direction, and the position correction as described above is performed stepwise so that the position of the IC lead frame W with respect to the carrying central axis 9 is increased. The displacement amount gradually decreases, and the displacement amount becomes zero on the downstream side in the transport direction, that is, the position is aligned with the transport center axis line 9. At this time, since the positional deviation of the IC lead frame W is gradually corrected by the taper portion 13 of each of the transport rollers 11, the IC lead frame W does not abruptly rub against the equal-diameter portion 12 of each of the transport rollers 11 and scratches. Is prevented from sticking.

Further, the position adjusting and conveying device is configured such that each conveying roller 11 is adjusted in accordance with the change of the IC lead frame W product type.
It has a position adjusting means 31 and a relative position detecting means (41) so that the relative position of the can be adjusted quickly and accurately.

The position adjusting means 31 includes a pair of holding members 21.
It is a means for adjusting the positions of L and 21R so as to be symmetrical with respect to the transport center axis 9. Further, in the relative position detecting means 41, the relative distance between the pair of holding members 21L and 21R whose position is adjusted by the position adjusting means 31 about the transport center axis 9 is a preset distance (set distance). It is a means for detecting that. The above “set distance” is accurately positioned on the transport center axis 9 when the IC lead frame W to be processed is transported downstream on the equal-diameter portion 12 of each transport roller 11 supported by the holding members 21L and 21R. The distance is selected so that they can be matched.

Specifically, the position adjusting means 31 supports the holding members 21L and 21R so as to be capable of approaching and separating from each other about the transport center axis 9 while maintaining the parallel state.
And a screw mechanism 32 for moving the holding members 21L and 21R toward and away from each other about the transport center axis 9 by the same length.

First, in the support mechanism 35, the pair of support members 35A and 35B, the support shafts 36A and 36B, and the bearing portion 3 are provided.
7A, 37B, 38A, 38B.

The support members 35A and 35B are arranged at a base (not shown) position which is separated from the transport center axis 9 by a predetermined distance, and the support shafts 3 are attached to the support members 35A and 35B.
6A and 36B are extended so as to be horizontal and parallel. The support shafts 36A and 36B are slidably fitted into bearing portions 37A and 37B provided on the holding member 21R, and bearing portions 38A and 38 provided on the holding member 21L.
It is slidably inserted in B.

Further, the screw mechanism 32 has a drive screw 33. The drive screw 33 is screwed into a female screw portion 34 provided on the holding member 21R and the holding member 21L.
It is screwed with the female screw portion 34L provided on the. The female screw portions 34R and 34L are provided so as to have a reverse screw relationship. An operation handle 39 is attached to a portion of the drive screw 33 protruding outward from the holding member 21R.

Therefore, when the drive screw 33 is appropriately rotated using the operation handle 39, the holding members 21R, 21
The L is approached (or separated) by the same amount with respect to the transport center axis 9 while maintaining the parallel state by the support mechanism 35.

Further, the relative position detecting means utilizes the fact that the IC lead frame W is made of metal and has conductivity, and the relative distance between the holding members 21L and 21R about the transport center axis 9 is the set distance. It is composed of a relative position detecting device 41 for detecting the fact.

More specifically, as shown in FIG. 2, the relative position detecting device 41 includes a predetermined conveying roller 11 located downstream in the conveying direction.
Terminal portions 43, 43 formed on the tapered portion 13 of S,
The terminal unit 43, 43 is connected via the electric wires 49, 49, etc., and is configured to include a detection unit 44 for detecting that an electric current has flowed in the electric wire 49, and a display unit 45 connected to the detection unit 44. There is.

Therefore, the IC lead frame W is conveyed on the equal-diameter portion 12 of each conveying roller 11 from the upstream side, and the taper portions 13, 1 of the conveying rollers 11S, 11S are conveyed.
When it reaches 3, the position is accurately aligned with the central axis 9 of the conveyance, and when both ends thereof contact the innermost ends of the tapered portions 13, 13, electric current flows through the electric wires 49, 49. this,
The detection unit 44 detects and detects that the relative distance between the holding members 21L and 21R has reached the set distance. The detection result is displayed on the display unit 45.

Next, the operation of this embodiment will be described.
When the IC lead frame W reaches the upstream side of each conveying roller 11, the IC lead frame W is continuously conveyed on the equal-diameter portion 12 of each conveying roller 11 toward the downstream side.

At this time, when the IC lead frame W is displaced with respect to the transport center axis line 9 and one end of the IC lead frame W rides on the taper portion 13 of one of the transport rollers 11, the IC lead frame W concerned. Presses the tapered portion 13 by its own weight in a direction substantially perpendicular to the surface thereof. Then, on the IC lead frame W, not only the rotational force from the taper portion 13 but also the inward drag force acts. As a result, the IC lead frame W moves inward while being conveyed and corrects its position.

In this way, the IC lead frame W is displaced in relation to the central axis 9 of the conveyance by performing the above-described position correction stepwise in association with the taper 13 portion of each conveyance roller 1 as it goes downstream in the conveyance direction. The amount is gradually decreased, and the positional deviation amount becomes zero on the downstream side in the transport direction, that is, the position is aligned with the transport center axis line 9.

When the type of the IC lead frame W is changed, the position adjusting means 31 is used to hold the holding member 2.
The relative positions of the 1L and 21R are adjusted until the relative position detecting device 41 detects that the relative distances have reached the set distance, and the respective conveying rollers 11 are placed at positions corresponding to the width dimension of the IC lead frame of the next type. Position.

However, according to this embodiment, the holding members 21L and 21R cooperate with the position adjusting means 31 and the relative position detecting device 41 so that the holding members 21L and 21R are symmetrically positioned about the transport center axis 9 and the relative distances therebetween. Is adjusted to a set distance, and a plurality of sets of conveying rollers 1 are attached to the holding members 21L and 21R.
1 has a configuration in which each taper portion 13 is displaced so as to approach the direction of the transport center axis 9 as it goes downstream in the transport direction. Therefore, the lower limit position is set by the equal-diameter portion 12 of each transport roller 11. Moreover, the IC lead frame W itself is involved in the tapered portion 13 of each of the transport rollers 11 to correct the position in the width direction. Therefore, the IC lead frame W
Even if the lead wire is extremely thin and the lead wire is thin, it can be quickly and accurately conveyed while being aligned with the conveyance center axis line without being deformed.

Further, the position adjusting means 31 and the relative position detecting means (41) adjust the holding members 21L and 21R so that the relative distance becomes a set distance, and the relative positions of the respective conveying rollers 11 are treated as ICs to be processed. It can be fitted to the lead frame W. As a result, the type of the IC lead frame W can be switched quickly and accurately. Therefore, it can be adequately adapted to the current multi-product small-quantity production.

[0041]

As described above, according to the present invention, a plurality of sets of conveying rollers having a constant diameter portion and a taper portion, a pair of holding members, and position adjusting means are provided, and a plurality of sets of holding members are provided for each holding member. The conveying rollers are arranged so that each equal diameter portion faces inside, and each taper portion is arranged so as to approach the conveying central axis direction as it goes downstream in the conveying direction, and the position is adjusted by the position adjusting means. Since the relative position detecting means for detecting that the relative distance between the pair of holding members about the transport center axis becomes the preset distance is provided,
C Even if the lead frame is extremely thin and the lead wire is thin, it is possible to carry out continuous transportation quickly and accurately while aligning with the transportation center axis line without being deformed.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of an embodiment of the present invention.

FIG. 2 is a diagram for explaining relative position detecting means.

FIG. 3 is a diagram for explaining the overall configuration of a conventional plating apparatus.

FIG. 4 is a diagram showing a configuration of a conventional IC lead frame alignment transfer device.

[Explanation of symbols]

 11 Transport Roller 12 Equal Diameter Part 13 Tapered Part 21L Holding Member 21R Holding Member 31 Position Adjusting Means 41 Relative Position Detecting Device (Relative Position Detecting Means)

Front page continued (72) Inventor Noriyuki Yuguchi 1-1-1, Ichigaya-Kagacho, Shinjuku-ku, Tokyo Within Dai Nippon Printing Co., Ltd. (72) 1-1-1 Ichigaya-Kagacho, Shinjuku-ku, Tokyo Dai Nippon Printing Co., Ltd. (72) Inventor Teruo Omori 3-6-1 Hirao, Inagi City, Tokyo Sanyu Engineering Co., Ltd. (72) Inventor Shogo Kurachi 3-6-1 Hirao, Inagi City, Tokyo Sanyu Engineering Nearing Co., Ltd. (72) Inventor Tetsuo Matsushita 3-6-1 Hirao, Inagi-shi, Tokyo Sanyu Engineering Co., Ltd.

Claims (1)

[Claims] 1. A plurality of sets of conveying rollers each having an equal diameter portion and a taper portion having a small diameter on the side of the equal diameter portion and which is inclined to expand outwardly. A pair of holding rollers mounted so as to be possible, and a position adjusting means for adjusting the positions of the pair of holding members so as to be symmetrical with respect to the transport center axis, and each holding member has a plurality of sets of transport rollers. Are arranged so as to face each other so that each equal-diameter portion is on the inside, and each taper portion is displaced so that it approaches the transport central axis direction as it goes downstream in the transport direction, and a pair of which the position is adjusted by the position adjusting means. 2. An IC lead frame alignment transfer device, comprising: relative position detection means for detecting that a relative distance between the holding members of the transfer center axis is a preset distance.