JPH0431925B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention is for producing printed board packages that are widely used in the construction of various electronic devices. This invention relates to a control system for an electronic component magazine filling machine for a so-called sequence taping machine, which is an automatic electronic component insertion machine used for inserting electronic components into a machine.

(b) Background of the technology A large number of so-called printed circuit board packages equipped with various electronic components are used in the construction of various electronic devices. As the use of printed circuit boards and, therefore, the mounting density of electronic components on printed circuit boards increases, the absolute number of electronic components also increases significantly, and automatic electronic component insertion machines are used to reduce assembly man-hours.

Figure 1 is a block diagram showing an overview of the automatic process for manufacturing printed board package PP, and shows the various electronic parts P required for package PP.
1, P2,...PN have different types, and some of the same type have different ratings, but they all have lead wires in the axial direction from both sides, and those with almost the same shape are selected and used. .

From this group of electronic components, sequence taping, Machine STM is used. This is done according to instructions from the automatic insertion machine AIM and the computer CP, which is controlled by a program for the parts insertion order necessary to manufacture the package PP.

Electronic parts P1 supplied to this machine STM,
P2,...PN is a mass-produced printed circuit board package PP, and many of the same type and rating are taped together on the market, but one roll has over 1,000 parts, so there are many types It is uneconomical to use in small-scale production, and for this purpose, individual parts must be placed in a long and narrow magazine (also called a cassette) MG, a part of which is shown in perspective in Figure 2. , Sequence taping machine STM has a similar configuration to taped parts by accommodating about 2 to 300 pieces in the same direction in an orderly manner.
Measures are being taken to supply the

This magazine MG consists of an elongated frame 1 made of aluminum material and having a U-shaped cross section, for example, and a flat plate 2 made of transparent acrylic resin, and electronic components 5 (resistors, capacitors, In order to stack the components (diodes, etc.) in an orderly manner, a gap 6 having a shape similar to, but slightly larger than, the component shape is formed.

By using this magazine MG, the retaping work of supplied parts in the machine STM has the advantage that it is not necessary to cut the left and right taped parts of the parts, compared to the case of using taped parts suitable for mass production as described above. We are prepared.

(c) Problems with the prior art In order to orderly stack individual disparate parts in the magazine MG, the gaps 6 in the magazine MG can be reduced by using a parts feeder and a zigzag chute, which have been widely used in the past. You can drop it into the tank in a roughly correct position.

However, at this time, it is a necessary condition for the lead wires 3 and 4 of the electronic component 5 to be approximately correctly straight in the axial direction in order to be inserted into the gap 6.
There are lead wires with deformed shapes that do not necessarily satisfy this condition, and it is necessary to correct such deformations to prevent normal insertion work.

Furthermore, even if the above conditions are met and the parts are inserted normally, the length of the magazine is 6 to 70 centimeters, which accommodates several hundred parts in a stack, so until the magazine is filled with the parts, It is difficult to maintain a correct horizontal posture while falling through a gap,
Especially in the beginning, because the falling distance is long, the posture deteriorates significantly, and the sequence taping machine stops in an oblique position, sometimes in a vertical position, and the sequence taping machine for the next process
When supplying parts to the STM, it becomes impossible to smoothly supply each part from the bottom of the magazine MG.

(d) Object of the Invention The present invention is directed to a magazine filling machine of this type that eliminates the above-mentioned drawbacks of the conventional technology and makes it possible to continuously and smoothly store electronic components that are dropped and inserted into the magazine. The purpose is to provide a new control method.

(e) Structure of the Invention The above object is to control electronic components to be dropped and inserted into a magazine so that they fall step by step over a short distance until the components are stacked and packed in the magazine. This is achieved by the method of the present invention.

Since a plurality of electronic components to be inserted fall step by step over a short distance, the horizontal posture of the components does not change significantly during the fall, and the correct horizontal posture is restored once the electronic components come to rest.

In this way, it is possible to maintain the correct horizontal position within the magazine until the magazine is filled.

As specific means of the control method according to the present invention,
An optical sensor is installed close to the component insertion opening of the magazine to detect the presence or absence of the topmost component, and a means is provided to stop the electronic components falling in the magazine at regular short distances over the entire length of the magazine. It is relatively simple and advantageous to sequentially release the stopping means using the output of the optical sensor.As the stopping means, solenoids each having a plunger are disposed at regular intervals on a board to which the magazine is attached, and the tip of the plunger is The plunger may be made to protrude from a control hole provided on the rear surface of the magazine, and the plunger may be sequentially sucked from above by the output of the optical sensor to release the stoppage of parts from falling.

(f) Embodiments of the invention The gist of the present invention will be specifically explained below with reference to embodiments shown in the drawings. The same reference numerals indicate the same objects throughout the figures.

Fig. 3 shows a side view of the main parts of the electronic component magazine packing machine, Fig. 4 is an enlarged view of the lead wire straightening means, and Fig. 5 is a partially sectional side view of a magazine that is advantageous for use in the present invention. FIG. 6A is a block diagram of the control circuit, and FIG. 6B shows the output waveforms of various parts of the control circuit.

In Fig. 4, 9, 9', 12, 12' are rotating disks, 1
0 is a fall prevention plate, 11 is a parts delivery plate, 13,1
3', 14, 14' are rubber rollers, 15, 15',
16, 16' are lead wire correction fixing plates, G1, G2
is the center guide board. As is clear from FIG.
1, and the rotating disks 12, 12' are similarly fixed to the rotating axis A×2. Rotating plate 12,1
2' is larger than the interval between rotating disks 9, 9',
As shown in FIG. 4b, the rotating disks 9 and 9' are arranged so that the grooves overlap between the rotating disks 12 and 12'. Further, a fall prevention plate 10 is provided between the rotating discs 9 and 9' so as to overlap the groove from above.
Further, a component delivery plate 11 is provided so as to intersect the grooves of both rotary plates. A set of two center guide plates G1, G2 are provided between the rotating disks 12, 12'. The center guide plate G1 has a surface S1 for moving the part toward the outside of the groove, and the center guide plate G2 has a surface S2 of the same curvature as the disk. Furthermore, as shown in FIG. 4c, the intervals between the center guide plates G1 become narrower as they move upward, and the intervals between the center guide plates G2 become narrower as they move downward. And the distance between both ends l1, l2
is approximately equal to the width of the component body, and the center of both guide plates coincides with the center of the interval between both rotating disks. A pair of lead wire correction and fixing plates 15, 15', 16, 16' are provided at positions corresponding to the tops of the rotating discs 12, 12' so as to sandwich the discs 12, 12'. Opposing rubber rollers 13,1
3', 14, 14' are provided.

An electronic component 5 equipped with lead wires 3 and 4 in the axial direction is supplied from a parts feeder 7 to a zigzag chute 8, and the electronic component 5 is provided with lead wires 3 and 4 in the axial direction. The wires 3 and 4 are suspended and passed through the fall prevention plate 10, and then passed through the parts delivery plate 11.
As shown in FIG. 4a, it is conveyed to the second equally divided grooved disks 12, 12', which are similarly constructed of a pair of left and right disks, and is moved around the position of the component body by the component center guide plate G1. After the transition, the left and right leads are placed between a series of rubber rollers 13 placed across a disk 12 provided at the top, and a lead wire correction fixing plate 14 placed opposite the rubber rollers 13. The wires 3 and 4 are crimped and conveyed to correct the lead wire shape into a straight line, and are dropped substantially horizontally into the gap 6 of the magazine MG.

As shown in the side sectional view in FIG. 5, the magazine MG has control holes 17, 17',
17''... are provided, and are arranged on the board 18 mounted diagonally, and in this case, the board 1
Solenoid SOL1 installed at regular intervals on 8,
The tips of the plungers PL1, PL2, . . . of the SOL2, . . . project into the control holes 17, 17', . If the gap from the insertion port to plunger PL1 is filled with part 5,
The optical sensor 19 operates, and the solenoid SOL1 of the plunger PL1 operates, sucking this and dropping the previous parts row to the plunger PL2.
make it stop.

When the gap 6 up to the insertion port is filled with the stack of parts 5 that are further dropped and inserted, the optical sensor 19 operates again to suck the plunger PL2, causing the parts row up to the next plunger PL3 to fall and stop. .

In this way, a certain number of parts rows fall step by step between the plungers over a short distance, so that they are ejected from the lower part of the magazine MG while maintaining their approximately correct horizontal posture.

Figure 6 shows a control method for controlling the fall of electronic components inserted into the magazine MG as described above using a block diagram a and output waveforms b of each part in the block diagram. The electronic components falling in front of the optical sensor 19 are stacked one after another on the first plunger PL1, while the optical sensor 19 outputs a short pulse train as shown at 1 in FIG. When stacked, they produce a wide steady-state output.

The narrow pulse output is removed from this output by the integrating circuit 20, resulting in the output shown at 2 in FIG. 6b. The output becomes a pulse train output shown by 3 in FIG. 5b in the monostable multi-vibrator circuit 21, and is inputted to the decoder circuit 23 via the counter circuit 22, and photocouplers PC1 and PC2 for separating the logic system and the solenoid system. ,...
PCN, transistors TR1, TR2...TRN, and used to drive solenoids SOL1, SOL2...SOLN.

When the stacking up to the first insertion port is completed, the solenoid
SOL1 operates to drop the stacked parts to the plunger PL2, and when the stacked parts reach the second insertion port, the solenoid SOL2 operates to stop the stacked parts falling to the position of the plunger PL3, and thus the lower solenoid and move on to its movements.

(g) Effects of the Invention As explained above, the control of the electronic component magazine packing machine according to the present invention exhibits a remarkable industrial effect in that it eliminates the functional disturbance caused by the change in posture in the magazine as in the prior art.

[Brief explanation of drawings]

Figure 1 is a block diagram showing an overview of the automated process for manufacturing printed board packages;
The figure is a perspective view showing one example of a magazine used, FIG. 3 is a side view showing essential parts of one embodiment of the present invention, FIG. 4 is an enlarged view of the lead wire correction means, and FIG. 5 is the present invention. FIG. 6 is a partially sectional side view of an example of a magazine that is advantageous for use in the control method. FIG. 6 shows an example of the control method using a block diagram a and output waveforms b of various parts. In the figure, MG is a magazine, P1, P2,...
...PN and 5 are electronic components equipped with axial lead wires 3 and 4, 6 is a gap in the magazine, 9 and 12 are equally divided groove disks, 13 is a rubber roller, 17, 17', 1
7"... is the control hole on the back of the magazine, 19 is the optical sensor, 20 is the integral circuit, 21 is the monostable multi-vibrator, 22 is the counter circuit, 23 is the decoder circuit, SOL1, SOL2,...SOLN is the solenoid, PL1 , PL2, ... PLN indicates a plunger.

[Claims]

1. A band storage chamber that has an inlet and an outlet for packing bands, is provided so that its width can be adjusted according to the width of the band used, and is open at the top, and the vicinity of the band inlet of this band storage chamber. a drive roller for introducing a band, which is provided at the top of the band storage chamber, is movable in a direction to cover the top of the band storage chamber, and is at least the adjustable maximum width of the band storage chamber; and a switch that is activated by the movement of the detection bar and controls the driving force of the band introducing drive roller, and the detection bar is located in the band storage chamber. When a certain amount of the band is stored, it is pushed up by the waist of the band, and the switch is connected to stop the driving force of the band introducing drive roller when the detection bar is pushed up. A band storage device for a packing machine characterized by: 2. Claim 1, wherein the switch is connected to a timer or counter, and even after the detection bar is pushed up, the band is still introduced into the band storage chamber for a certain period of time determined by the timer or counter.