JPH10120277A - Strip metal plate stacking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a strip metal plate stacking device that can stack strip metal plates without inclining them at the time of stacking plural sheets of strip metal plates in a storage part provided below a supply part. SOLUTION: A lead frame stacking device for stacking the specified number of lead frames, cut in strip shape, in a storage part provided below a lead frame conveyor 10 is provided with a receiving part 12 provided near the end part of the conveyor 10 so as to temporarily receive plural sheets of lead frames, and a storage means for storing stacked material, formed of the specified number of lead frames received and stacked in the receiving part 12, while holding the stacked state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for stacking strip-shaped metal sheets, and more particularly, to a method for feeding a predetermined number of strip-shaped metal sheets such as lead frames cut into strips from a strip metal sheet supply unit. The present invention also relates to a loading device for strip-shaped metal plates loaded on a storage portion provided below.

[0002]

2. Description of the Related Art As in a lead frame used in a semiconductor device, a strip-shaped metal plate which is pressed and cut into strips is usually loaded in a predetermined number, packed in a transport box, and transported in the hall. Or shipped. For this reason, a loading device for strip-shaped metal plates is used to load a predetermined number of strip-shaped metal plates. A conventional strip-shaped metal plate stacking device is provided below a feeding portion of a strip-shaped metal plate, and a plurality of pins are provided in a storage portion (magazine) standing upright from the feeding portion to the strip-shaped metal plate. Are loaded one by one. According to this loading device, the position of the strip-shaped metal plate is regulated while the peripheral edge of the strip-shaped metal plate is in contact with the upright pin, and the strip-shaped metal plate can be stacked at a predetermined position in the storage section. Next, when a predetermined number of strip-shaped metal plates are stacked in the storage section, the load is taken out of the storage section, packed in a transport box, and provided for transportation or the like.

[0003]

By using such a strip metal plate loading apparatus, a predetermined number of strip metal plates can be easily loaded. However, since the pins provided upright around the storage section regulate the position of the strip-shaped metal plates stacked in the storage section, the clearance between the pins and the stored strip-shaped metal plates is set to be narrow. For this reason, the strip-shaped metal plates falling between the pins from the supply unit are often loaded in the storage unit in an inclined state, and it is necessary to correct the posture of the strip-shaped metal plates stacked in the inclined state. On the other hand, a loading device for strip-shaped metal plates is usually provided so as to be connected to a press machine. When the working speed (rotation speed) of the press machine becomes high, as in recent years, the loading device is mounted in an inclined state. There is no time to correct the posture of the strip-shaped metal plate.
In addition, when the strip-shaped metal plate becomes thinner like a lead frame, when the posture of the strip-shaped metal plate stacked in an inclined state is corrected, deformation of a molded member such as a lead formed on the strip-shaped metal plate is caused. Easy to occur. Therefore, an object of the present invention is to provide a strip-shaped metal plate that can be stacked without inclining the strip-shaped metal plate when loading a plurality of strip-shaped metal plates in a storage unit provided below the supply unit. It is to provide a loading device.

[0004]

As a result of repeated studies to solve the above-mentioned problems, the present inventor once loaded a predetermined number of strip-shaped metal plates near the supply port of the strip-shaped metal plate and carried the load. After that, the present inventor has learned that storing the load in the storage section can prevent the strip-shaped metal plate from being loaded in the storage section in an inclined state, and arrived at the present invention. That is, according to the present invention, a predetermined number of strip-shaped metal plates such as lead frames cut into strips is loaded on a storage unit provided below a supply unit of the strip-shaped metal plates. An apparatus, comprising: a receiving portion that is provided near a supply portion of the strip-shaped metal plate and temporarily receives a plurality of strip-shaped metal plates; and a predetermined number of strip-shaped metal plates received and stacked in the receiving portion. And a storage means for storing the loaded article in the storage section while maintaining the loaded state.

[0005] In the present invention, the received strip-shaped metal plate is accommodated in the receiving portion comprising the stopper member that regulates the tip end position of the strip-shaped metal plate and the side plate that regulates each side position of the strip-shaped metal plate. A support member for supporting is provided so as to be able to move up and down, and when a predetermined number of strip-shaped metal plates are stacked on the support member, the support member is controlled such that the support member descends and stores the load in the storage portion. By providing the control means, the load state can be maintained and the load can be easily stored in the storage section. Further, by the control means,
The supporting member is gradually lowered according to the number of loaded strip-shaped metal plates, and when a predetermined number of strip-shaped metal plates are loaded, the supporting member is lowered so that the load is accommodated in the storage portion. Is controlled, the loading position of the strip-shaped metal plates loaded on the support member can be set to a constant height. Further, the rotating table, in which a plurality of storage portions for storing the load loaded on the support member are radially provided, is hindered by the support member when the load of the support member is stored in the predetermined storage portion. By being able to rotate without being
Switching of the storage section can be performed quickly. Like this,
In the present invention, while storing the load loaded on the support member in the storage portion, the support portion for temporarily supporting the strip-shaped metal plate received in the receiving portion is provided, so that it is connected to a high-speed rotating press working machine. Even when the storage unit is switched, it is not necessary to temporarily stop the operation of the press machine even when the storage unit is switched, so that the efficiency of the press process can be improved.

According to the strip metal plate loading device of the present invention, the receiving portion provided near the supply port of the strip metal plate has:
The strip-shaped metal plates sent one after another are stacked, and when a predetermined number of strip-shaped metal plates are stacked, they are stored while maintaining the loaded state of the load. For this reason, the distance from the supply port of the strip-shaped metal plate to the support member can be made as short as possible, and a plurality of pins can be directly stored around the supply port of the strip-shaped metal plate. As in the case where the strip-shaped metal plate is dropped into the portion, it is possible to prevent the strip-shaped metal plate falling between the pins from being loaded in an inclined state. As a result, it is not necessary to correct the posture of the strip-shaped metal plates stacked in an inclined state, and it is possible to prevent deformation of a thin strip-shaped metal plate such as a lead frame during stacking.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the drawings. FIG. 1 is a perspective view of a loading device for a lead frame according to the present invention. The loading device shown in FIG. 1 is connected to a pressing machine (not shown), and a receiving portion 12 is connected to an end of a conveyor 10 serving as a supply portion for supplying the pressed lead frame to the loading device. ing. Below the receiving portion 12, a plurality of storage portions 14 having a plurality of pins standing upright are provided radially on a turntable 16. The rotary table 16 is intermittently driven to rotate by an electrically driven servo motor 18 provided in a base 22 on which the rotary table 16 is mounted, and the servo motor 18 is controlled by a control device in a control box 20. Have been. The loading device shown in FIG.
Casters 24, 24 with stoppers at the bottom of the base 22
.. are provided, and can be moved and fixed to a desired position.

FIG. 2 is a partially enlarged perspective view for explaining the receiving portion 12 and the storage portion 14 shown in FIG. Storage unit 14
A plurality of pins 28, 28,... Are provided on the periphery of the housing substrate 26 fixed on the rotating table 16 which rotates intermittently.
Are provided around the main body, and a strip-shaped lead frame is stored between the pins 28. The pins 28 are erected on the turntable 16 and extend upward from perforated holes formed in the storage board 26. Each of the through-holes 32a, 32b, and 32c is penetrated in the housing part board 26 along the longitudinal direction, and the through-holes 32a, 32b, and 32c are elongated holes ( (Not shown). When the storage portion 14 reaches a predetermined position below the receiving portion 12, the support member 34 passes through the elongated holes and the through holes 32 a, 32 b, and 32 c from below the turntable 16.
Each of a, 34b, and 34c rises to support the lead frame inserted into the receiving portion 14. In the housing portion substrate 26, between the through hole 32a and the through hole 32b,
Between the base 2b and the through hole 32c, grooves 30 are provided in parallel so as to cross the storage base 26. The concave grooves 30, 30 facilitate the removal of the load by inserting a claw member or the like into the lower surface of the volume when removing the load of the lead frame loaded on the storage board 26 from the storage 14. Things.

The receiving portion 12 has side plates 36a and 36b for regulating the respective positions on both sides of the lead frame fed from the conveyor 10, mounted on fixed plates 37a and 37b fixed to the end of the conveyor 10. Side plates 36a, 36
The gap b can be adjusted by the adjusting screw 38. A stopper member 4 for regulating the position of the leading end of the lead frame received in the receiving portion 12 is provided at the leading end of the side plate 36b.
0 is provided slidably in the longitudinal direction of the side plate 36b. On the other hand, the side plates 36a have support members 34a, 34
The supporting device 4 as a supporting means for temporarily supporting the lead frame received in the receiving portion 14 while the loaded material in which the lead frame is loaded on the b and 34c is stored in the storing portion 14.
2 are provided. Further, a sensor 44 for detecting a lead frame fed into the receiving portion 14 is provided near the entrance of the receiving portion 14.
Is provided with a sensor 46 for detecting the level of the lead frame received. The signals detected from these sensors 44 and 46 are sent to a control device in the control box 20 (FIG. 1).

As shown in FIG. 3, the support device 42 shown in FIG. 2 is a fork 4 for supporting a lead frame by projecting from small holes 41a, 41b (FIG. 2) formed in the side plate 36a.
3a and 43b are fixed to the cross rail 45, and the side plate 36a
The electric motors 47a, 47b fixed to the
a and 48b are rotatably mounted on the shaft. In addition, 4
5, and the rotating members 48a and 48b are connected by coil springs 50a and 50b as shown in FIG. For this reason, when the electric motors 47a and 47b rotate to one side, and the horizontal members 45 are pressed by the rotating members 48a and 48b, the forks 43a and 43b are moved to the small holes 41 of the side plate 36a.
a, 41b. On the other hand, electric motors 47a, 4
When the rotating members 48a and 48b move away from the horizontal rail 45 and pull the coil springs 50a and 50b, the forks 43a and 43b projecting from the small holes 41a and 41b of the side plate 36a are pulled back. .

The side plate 36a which constitutes the receiving portion 14,
36b, between the bearing members 34a, 34b,
34c is supported by each of the columns 35a, 35b and 35c shown in FIG.
The lifting and lowering of 4a, 34b, 34c is performed by an electric motor (not shown) provided below the turntable 16. An electric motor is used as a driving device for driving various driving members constituting the loading device for a lead frame shown in FIGS. This is because the electric motor does not require a compressed air supply source unlike a compressed air cylinder, and can prevent a malfunction or the like due to a variation in compressed air pressure. The electric motor is controlled by a control device in the control box 20 (FIG. 1).

According to this control device, the rotary table 16
Is rotated by a predetermined angle, and when the empty storage portion 14 reaches a predetermined position below the receiving portion 14, when the through hole 3 of the storage portion substrate 26
From each of 2a, 32b, 32c, a bearing member 34a, 34
b, 34c are raised from below the turntable 16;
As shown in FIG. 4, the support members 34a, 34b, 34c support the lead frame sent from the conveyor 10 by raising the upper surface of each support member to a position substantially flush with the feed surface of the conveyor 10. I do. At this time, the lead frame is loaded on the support members 34a, 34b, 34c while the side ends thereof are regulated by the side plates 36a, 36b and the leading end is regulated by the stopper member 40.
As described above, the number of lead frames fed into the receiving portion 14 is detected by the sensor 44, and the acceptance level of the lead frame is detected by the sensor 46. Based on the signals from these sensors 44, 46, the bearing members 34a, 34b,
34c gradually descends to always maintain the loading level of the lead frame at a fixed position. Next, the sensor 44 detects that a predetermined number of lead frames have been received by the receiving portion 14.
, The support members 34a, 34b, 34c descend from the respective through holes 32a, 32b, 32c of the storage board 26 below the turntable 16, and the load on which the lead frame is loaded is Multiple pins 28, 28
Are placed on the surrounding storage board 26. Thereafter, the turntable 16 is rotated by a predetermined angle so that the empty storage section 14 reaches a predetermined position below the receiving section 14. As described above, since the support members 34a, 34b, and 34c are lowered below the turntable 16, the rotation of the turntable 16 is not hindered.

A support device 42 is provided in the receiving part 14 so that the operation of the press machine can be continued without stopping the operation of the press working machine even during the switching of the storage part 14.
That is, when the support members 34a, 34b, and 34c are lowered to store the load in the storage unit 14, the lead frame sent from the press machine to the receiving unit 14 includes the side plate 36.
a fork 43 of the supporting device 42 projecting between
a, 43b. Then, empty storage unit 1
When the lead 4 reaches a predetermined position below the receiving portion 14, the support members 34a, 34b, and 34c are raised, and the lead frame is moved from the forks 43a and 43b so that the lead frame and the forks 43a and 43b are in a non-contact state. Then, the forks 43a and 43b projecting between the side plates 36a and 36b are pulled out. For this reason,
When pulling out the forks 43a and 43b, the forks 4
It is possible to eliminate the possibility of deforming the leads and the like formed on the lead frame by coming into contact with the leads 3a and 43b. Thereafter, the supporting members 34a, 34b, 34c are gradually lowered to keep the loading level of the lead frame at a constant position, and a predetermined number of lead frames are transferred to the supporting members 34a, 34b, 3c.
4c.

By the way, the lead frame is processed by the press machine and immediately sent by the conveyor 10, so that the processing oil or the like is attached. For this reason, a situation where processing oil or the like accumulates in the gap between the load of the lead frame and the side plates 36a and 36b of the receiving portion 14 may occur. Such a situation can be prevented by making the gap between the side plates 36a and 36b a tapered gap that is wider in the lower gap than in the upper gap, as shown in FIG. In FIG. 5, the side plate 36
a as a vertical plate, a reference plate for a lead frame, and a side plate 3
6b is an inclined plate to form a tapered gap, and the inclination angle θ of the side plate 36b is 40 minutes. FIG. 5
In the receiving portion 14 composed of the side plates 36a and 36b shown in FIG. 5, the gap between the side plates 36a and 36b is tapered to regulate the positions of both side ends of the lead frame in the upper gap and to load them on the support members 34a, 34b and 34c. However, the loading state of the lead frame is good. The side plates 36a and 36b shown in FIG. 5 may both be inclined plates, or the side plate 36a may be an inclined plate and the side plate 36b may be a vertical plate.

As described above, the load of the lead frame stored in the storage section 14 of the loading apparatus shown in FIGS. 1 to 5 is read when the storage section 14 moves from a predetermined position below the receiving section 12. The load on the frame can be removed manually or by a robot. At this time, a person's finger or a nail of a robot can be inserted into the concave grooves 30, 30 formed in the storage board 14, and the load on the lead frame can be taken out. Although the loading device shown in FIGS. 1 to 5 is a loading device for loading a lead frame, it can also be used as a loading device for other strip-shaped metal plates cut into strips like a lead frame. Of course.

[0016]

According to the present invention, a strip-shaped metal plate, such as a lead frame, can be loaded in a storage portion without damaging or deforming the strip-shaped metal plate, and can be used as a box or the like. Can be filled with the load of the strip-shaped metal plate and can be used for transportation or the like.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a strip-shaped metal plate loading device according to the present invention.

FIG. 2 is a partially enlarged perspective view of the loading device shown in FIG.

FIG. 3 is a front view of a receiving section 12 shown in FIG.

FIG. 4 is a side view of the receiving portion 12 shown in FIG.

FIG. 5 is a cross-sectional view of the receiving section 12 shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Conveyor (supply part) 12 Receiving part 14 Storage part 16 Rotary table 20 Control box 34a, 34b, 34c Support member 36a, 36b Side plate 40 Stopper member 42 Support device (support means)

Claims (5)

[Claims] 1. A loading device for a strip-shaped metal plate for loading a predetermined number of strip-shaped metal plates such as lead frames cut into strips into a storage section provided below a feeding section of the strip-shaped metal plate. A receiving portion provided in the vicinity of the supply portion of the strip-shaped metal plate and temporarily receiving a plurality of strip-shaped metal plates; and a predetermined number of strip-shaped metal plates received and stacked in the receiving portion. And a storage means for storing the loaded material in the storage portion while maintaining the loaded state. 2. The received strip-shaped metal plate is placed in the receiving portion provided with a stopper member that regulates a tip end position of the strip-shaped metal plate and side plates that regulate each of both side positions of the strip-shaped metal plate. The supporting member is provided so as to be able to move up and down, and when the predetermined number of strip-shaped metal plates are stacked on the supporting member, the supporting member is controlled such that the supporting member descends and stores the load in the storage portion. 2. The strip metal plate loading device according to claim 1, further comprising control means for performing the operation. 3. The control means according to claim 1, wherein the support member gradually descends in accordance with the number of loaded strip-shaped metal plates, and when a predetermined number of strip-shaped metal plates are loaded, the support member descends to remove the load. 3. The support member is controlled so as to be accommodated in the storage portion.
A loading device for the strip-shaped metal body described in the above. 4. A rotary table, in which a plurality of storage portions for storing loads loaded on a bearing member are radially provided,
The strip-shaped metal plate loading device according to any one of claims 1 to 3, wherein when the load of the support member is stored in a predetermined storage portion, the support member can rotate without being hindered by the support member. 5. A support means for temporarily supporting a strip-shaped metal plate received in a receiving portion while storing a load loaded on a bearing member in a storage portion. A loading device for a strip-shaped metal plate according to claim 1.