JPS6153969B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic dropping device for printed circuit boards in an automatic electronic component insertion machine that automatically mounts electronic components on printed circuit boards.

An electronic component automatic insertion machine automatically mounts electronic components onto a printed circuit board supplied on the turntable of this machine, for example, according to a program stored in an NC control unit. Therefore, in order to fully automate this machine, it is necessary to automatically take out the printed circuit board on which components have been mounted from the turntable. Therefore, it is conceivable to provide a robot arm, for example, and operate the robot arm to take out the printed circuit board in conjunction with the completion of mounting the components on the printed circuit board. However, such a configuration requires a space for arranging the robot arm and a space for operating this arm, which is not preferable in terms of space factor. In addition, the insertion of components must be stopped while the robot arm takes out the printed circuit board, reducing productivity. Furthermore, if the operating speed of the robot arm is increased, troubles such as gripping the printed circuit board become uncertain or damage to the printed circuit board may occur.

The present invention has been made with the aim of overcoming such problems, and is an automatic electronic component insertion machine that automatically mounts electronic components on a printed circuit board 10 placed on a turntable 12. , a pair of holding means 90 and 91 are arranged on the turntable 12 to place the printed circuit board 10 thereon and are configured to be movable so that the distance between them can be changed; The turntable 12 is provided with openings 89 for dropping printed circuit boards corresponding to the printed circuit boards 10 placed on the holding means 90 and 91, respectively, and the printed circuit boards 10 are placed on the pair of holding means 90 and 91. When the electronic components have been mounted on the printed circuit board 10, the distance between the pair of holding means 90 and 91 is widened, and the holding of the printed circuit board 10 by the pair of holding means 90 and 91 is released. Accordingly, the printed circuit board 10 is caused to fall below the turntable 12 through the printed circuit board dropping opening 89. Therefore, no special means for taking out the printed circuit board is required, which is advantageous in terms of space. Also, the time required to take it out becomes very short.

An embodiment of an automatic electronic component insertion machine to which the present invention is applied will be described below with reference to the drawings. This electronic component automatic insertion machine inserts lead wires of electronic components into through holes formed in a printed circuit board, and automatically mounts the electronic components on the printed circuit board.

First, the outline of this electronic component automatic insertion machine will be explained with reference to FIG.
An X-Y table 13 is equipped with a pair of left and right turntables 12 on which the printed circuit board supplied from 1 is placed, and electronic components are supplied to the printed circuit board mounted on the turntable 12 and inserted into the through holes of the printed circuit board. a component insertion device 15 equipped with a pair of left and right insertion heads 14 for inserting lead wires;
An X-Y table moving device 16 for moving the X-Y table 13, a pair of left and right printed circuit board ejection devices 17 for ejecting printed circuit boards into which components have been inserted, and a pair of left and right printed circuit boards for storing ejected printed circuit boards. It is composed of a stocker 180.

As shown in Figure 1, this electronic component automatic insertion machine is configured symmetrically on the left and right sides, and electronic components are automatically mounted on two printed circuit boards at the same time, one on the left and one on the left. It's becoming like that. Therefore, in the following explanation, only the structure of the left side mechanism will be mainly explained.

First, the printed circuit board automatic dropping device will be explained with reference to FIGS. 2 and 3.
is composed of a plate-shaped body, and is configured to be moved in the X direction and the Y direction (horizontal direction and vertical direction in FIG. 2) by an X-Y table moving device. Note that a caster ball (not shown) is appropriately provided on the lower surface of the table 13, and the XY table 13 is made to move smoothly by the caster ball.

A pair of guide rails 82 and 83 are arranged at the left end of this X-Y table 13 in FIG. There is. An air cylinder 84 is fixed to the lower surfaces of these rails 82 and 83. A pressing rod 85 is fixed to the tip of one of the rails 82 (see FIG. 4). and rail 8
Step portions 86 and 87 are formed at 2 and 83,
These steps 86 and 87 allow the printed circuit board 1
The printed circuit board 10 is pressed by the rod 75 of the cylinder 74 and fed onto the XY table 13 while being guided by both sides of the printed circuit board 10.

There are three guiding rollers 8 on the X-Y table 13.
These rollers 88 rotatably support the turntable 12 relative to the XY table 13. The turntable 12 is configured in a ring shape, and has a relatively large circular opening 89 formed therein. A pair of printed circuit board guide rails 90 and 91 are arranged horizontally and facing each other in FIG. 2 so as to cross a part of this opening 89. As shown in FIG. 3, the rails 90, 91 are supported on a pair of mounting plates 92 that are arranged below the rails 90, 91 and extend along the rails 90, 91, respectively, These mounting plates 9
The mounting plate 92 is connected to the mounting plate 92 by a pair of pins 93 implanted in each of the mounting plates 2. Furthermore, rail 9
The elongated hole 94 formed in the rails 90, 91 and fitted with the pin 93 is inclined with respect to the length direction of the rails 90, 91.
1 is pushed in the length direction of the mounting plate 92, the distance between the rails 90 and 91 becomes wider. A stepped portion 95 is formed on the rails 90 and 91, and the printed circuit board 10 is supported by the stepped portion 95. Also rail 90,9
A restraining plate 96 is attached to the upper part of 1.

And the second of the pair of rails 90, 91
A mounting plate 92 supporting the upper rail 90 in the figure is directly mounted to the turntable 12. Further, a mounting plate 92 supporting the lower rail 91 is indirectly mounted to the turntable 12 via a pair of rail mounting plates 98. That is, the pair of rail attachment plates 98 are attached to the turntable 12 by a pair of arms 97, respectively, at appropriate intervals and perpendicular to the rail 90. The mounting plate 92 on the lower rail 91 side is spanned between the pair of rail mounting plates 98 and attached to these rail mounting plates 98. Therefore, by changing the mounting position of the mounting plate 92 on the lower rail 91 side on the mounting plate 98, the distance between the rails 90, 91 can be adjusted.

Next, regarding the detection device for detecting whether or not the printed circuit board 10 that has been moved onto the pair of rails 90 and 91 is in the correct position, particularly with reference to FIGS. A rotating shaft 100 is attached via a bracket 99. A pair of detection pins 102 are attached to the rotating shaft 100 via arms 101, respectively. These detection pins 102 are designed to be inserted into reference holes 103 formed in the printed circuit board 10. Further, a flap rod 105 is attached to the rotating shaft 100 via an arm 104. And this flats parody 1
An air nozzle 106 is disposed so as to face the tip of the air nozzle 05, and is attached to the XY table 13. When the detection pin 102 is correctly inserted into the reference hole 103, this nozzle 106 is closed by the tip of the flapper rod 105, and the back pressure of the nozzle 106 increases, thereby causing the printed circuit board 10 to move onto the turntable. Correct placement on 12 is detected.

Further, as shown in FIG. 4, a pressed arm 107 is fixed to the left end of the rotating shaft 100 in FIG. 2. As shown in FIG. A pressing bolt 108 is attached to the tip of the guide rail 82 opposite to the arm 107. When the guide rail 82 moves downward, the bolt 108 is attached to the pressed arm 1.
07 to rotate the rotating shaft 100 clockwise in FIG. 4. As a result, the detection pin 102 moves upward and is retracted to a position where it does not interfere with the insertion of the printed circuit board 10.

The detection pin 102 inserted into the reference hole 103 of the printed circuit board 10 has a tip end shaped like a triangular pyramid, as shown in FIG. Therefore, even if there is a slight deviation in the position of the printed circuit board moved onto the turntable 12, this detection pin 1
Correct positioning is achieved by the triangular pyramid-shaped tip of 02, and the above-mentioned misalignment is corrected. Also, the reference hole 10 of the printed circuit board 10
The insertion resistance of the pin 102 when inserted into the pin 3 is reduced.

Regarding the positioning mechanism of the turntable 12, a positioning block 129 is fixed to the outer periphery of the turntable 12, as shown in FIGS. 2 and 6. A pair of bolts 130 and 131 are attached to both sides of this block 129 so as to be adjustable. A pair of stoppers 132 and 133 are provided on the XY table 13 in correspondence with this block 129.
Furthermore, these stoppers 132 and 133 are provided with a stop projection 134 and a buffer projection 135, respectively.
and is provided.

Next, the operation of the electronic component automatic insertion machine having the above configuration will be explained.

First, when the rod 75 of the air cylinder 74 moves forward, both ends of the printed circuit board 10 in the width direction are located on extensions of the guide rails 82 and 83, and moreover, are connected to a pair of printed circuit board guide rails arranged on the turntable 13. It moves to the right in FIG. 2 while being guided by the stepped portions 95 of 90 and 91. The tip of this printed circuit board 10 is the X-Y table 1
When the light to the photo sensor 199 disposed on the base of the air cylinder 3 is blocked, the air cylinder 75 stops operating. As a result, the printed circuit board 10 comes to rest on the turntable 12.

Then, after a suitable period of time has passed after the photo sensor 199 is shielded from light, the rod 75 of the air cylinder 74 begins to move backward, and the pair of rails 82,
83 also rises, and the pressing bolt 108 attached to the tip of the rail 82 separates from the pressed arm 107, as shown in FIG. Then, the pressed arm 107 is pushed by the compression coil spring 200 interposed between the pressed arm 107 and the turntable 12, and the rotating shaft 100 to which this arm 107 is attached rotates as shown in FIG. Rotate counterclockwise as shown. Then this rotating shaft 100
A detection pin 102 at the tip of an arm 101 fixed to the turntable 10 is inserted into a reference hole 103 of the printed circuit board 10, thereby confirming that the printed circuit board 10 is correctly mounted on the turntable 12. That is, when the detection pin 102 is inserted into the reference hole 103 of the printed circuit board 10, the rotation shaft 10
The tip of the flapper rod 105, which is fixed at zero, closes the nozzle 106. Therefore nozzle 106
back pressure increases rapidly. If the printed circuit board 10 is not correctly placed on the turntable 12, the detection pin 102 will come into contact with the surface of the printed circuit board 10, and the rotation of the rotating shaft 100 will be stopped midway. For this purpose, the flat rod 105 is connected to the nozzle 1.
06, and the back pressure of the nozzle 106 does not increase. In this device, the nozzle 106
By increasing the back pressure of the printed circuit board 1
The correct positioning state of 0 is detected and the next operation is started.

Since the mounting of the printed circuit board 10 is detected by the flapper rod 105 and the nozzle 106 that work together with the detection pin 102, there is a self-cleaning effect and the influence of dust generated when electronic components are inserted is eliminated. I won't receive it. Therefore, there are fewer malfunctions and the machine operates more accurately.

When the detection device detects that the printed circuit board 10 is correctly mounted, the lead wire of the electronic component is inserted into the through hole of the printed circuit board 10, and the electronic component is mounted. In other words, the X-Y supporting the turntable 12
The table 13 moves in the X direction and the Y direction in FIG. 2 based on the NC control of the XY table drive device. Then, the electronic components supplied from the insertion head 14 (see FIG. 1) are inserted into the printed circuit board 10.
will be mounted in place. Note that all of the electronic components mounted at this time are oriented in the X direction, and are mounted in a pair of through holes formed in the Y direction.

Next, the turntable 12 is the X-Y table 13
This time, the electronic components are mounted facing in the Y direction. That is, electronic components are mounted in a pair of through holes formed in the Y direction on the printed circuit board 10. The turntable 12 is rotated by an air cylinder (not shown).
This is done by the operation of

Then, in the 90° rotated state, electronic components are further mounted on the printed circuit board 10 as described above. When the mounting of the predetermined electronic components is completed, the printed circuit board 10 is dropped downward through the circular opening 89 formed in the turntable 12 by the function of the automatic printed circuit board dropping device described in detail below. It's becoming like that.

First, when the air cylinder 84 attached to the lower part of the pair of guide rails 82 and 83 is activated and the rod 84a protrudes, this rod 84a
As shown in the figure, a printed circuit board guide rail 90,
Blocks 90a, 9 fixed to the ends of 91
Press 1a. The long holes 94 into which the pins 93 that support the rails 90, 91 fit are the rails 90, 9.
Since the blocks 90a and 91a are pushed, the rails 90 and 9
1 moves to the right in FIG. 6 against the coil springs 90b and 91b, and both rails 90,
91 becomes wider, these rails 90,
The printed circuit board 10, which was supported at both ends by the rails 91, is released from the support of the rails 90 and 91, as shown in FIG. 7, and naturally falls downward through the opening 89 of the turntable 12.

The printed circuit board 10 with components inserted therein is released from the support of the rails 90 and 91 and allowed to fall naturally downward through the opening 89 of the turntable 12, so that the printed circuit board 10 is removed from the turntable 12. This eliminates the need for a means for taking out, such as a robot arm, which is advantageous in terms of space. Moreover, the time for ejecting the printed circuit board 10 is greatly shortened.

As described above, the present invention provides a printed circuit board 1
a pair of holding means 90 disposed on the turntable 12 for placing 0 and movably configured to change the distance therebetween;
91, and an opening 89 for dropping a printed circuit board formed in the turntable 12 corresponding to the printed circuit board 10 placed on the pair of holding means 90, 91, Printed circuit board 10 placed on 90, 91
When the mounting of the electronic components is completed, the distance between the pair of holding means 90 and 91 is widened, and the holding of the printed circuit board 10 by the pair of holding means 90 and 91 is released. The printed circuit board 10 is configured to fall below the turntable 12 through the printed circuit board drop opening 89.

Therefore, according to the present invention, the printed circuit board 10 with components mounted thereon naturally falls through the opening 89 of the turntable 12, and a means for actively removing the printed circuit board 10, such as a robot arm, is activated. There is no need to provide it on the side of the turntable 12.

Further, the space required to take out the printed circuit board 10 is only at the bottom of the turntable 12, so there is no need to provide a space on the side for taking out the printed circuit board 10, and there is no need to disturb the proximity to the machine. It is also preferable in terms of Kuda.

Also, since it is a natural fall, the printed circuit board 10
The time required for ejecting the next printed circuit board 10 to the electronic component insertion device becomes extremely short.
can be supplied immediately, significantly improving productivity.

[Brief explanation of the drawing]

The drawings show an embodiment of an automatic electronic component insertion machine to which the present invention is applied. Figure 1 is a schematic plan view of this automatic electronic component insertion machine, and Figure 2 is a diagram showing an X-Y table and a turntable. A plan view, FIG. 3 is a sectional view taken along the - line in FIG. 2, FIG. 4 is a perspective view of the position detection device on the turntable of the printed circuit board, FIG. 5 is a sectional view taken along the - line in FIG. 3, and FIG. is a plan view of the turntable showing the operation of dropping the printed circuit board from the turntable;
FIG. 7 is a sectional view taken along the - line in FIG. 6. In addition, in the symbols used in the drawings, 10...
...Printed circuit board, 12...Turntable, 84
...Air cylinder, 89...Circular opening, 90...
...printed board guide rail, 91...printed board guide rail, 93...pin, 94...long hole.

Claims (1)

[Claims] 1. In an electronic component automatic insertion machine that automatically mounts electronic components on a printed circuit board 10 placed on a turntable 12, the turntable 12 is
a pair of retaining means 9 disposed thereon and configured to be movable such that the spacing between them varies;
0 and 91, and an opening 89 for dropping a printed circuit board formed in the turntable 12 in correspondence with the printed circuit board 10 placed on the pair of holding means 90 and 91, respectively. When mounting of the electronic components on the printed circuit board 10 placed on the holding means 90 and 91 is completed,
The distance between the pair of holding means 90 and 91 is widened, and the holding of the printed circuit board 10 by the pair of holding means 90 and 91 is released, whereby the printed circuit board 10 is moved into the opening for dropping the printed circuit board. 89 and below the turntable 12.