JPH0253172B2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an article transfer device.

For example, when attaching electronic components to a printed circuit board, an electronic component transfer device is used. This transfer device descends from above the magazine containing electronic components, holds the electronic components with its vacuum suction section at the lower end, ascends, moves to the top of the board, and then descends again to hold the electronic components. The component is attached by pressing the component onto the board and releasing the suction.

By the way, in the conventional transfer device, a lifting block is slidably guided in the vertical direction by a fixed vertical guide, and a horizontal rod having a holding means at one end is guided by the lifting block so as to be slidable in a horizontal state.
The horizontal rod was connected to a front and rear drive unit such as a front and rear cam, and the lifting block was connected to a vertical drive unit such as a vertical cam (for example, see Japanese Utility Model Application Publication No. 102077/1983).

For this reason, the vertical drive unit must move the weight of the lifting block, horizontal rod, and holding means up and down, and a drive source such as a motor with sufficient output is required, which is a factor that prevents the miniaturization of the device. It was becoming.

SUMMARY OF THE INVENTION The present invention has been made to eliminate the above-mentioned drawbacks, and an object of the present invention is to provide an article transfer device that can be downsized.

An example in which the present invention is applied to an apparatus for bonding electronic components to a printed circuit board will be described below.

First, a printed circuit board (hereinafter abbreviated as PC board)
1 refers to a flat plate a made of synthetic resin or other electrically insulating material on which wiring b is printed, for example, as shown in FIG.
A board to which many extremely small electronic components such as chip capacitors and chip resistors are attached is usually called a printed board (hereinafter abbreviated as PC board).

Next, the electronic component pasting device will be explained based on FIG. Assuming that 1 is a PC board, b is a printed wiring, and c is an electronic component such as a chip capacitor or a chip resistor, first, the electronic component c is vertically placed in a relative position to the attachment position of the electronic component c on the PC board 1. A magazine A stored in the direction is prepared.

Magazine A In magazine A, a storage cylinder 4 for stacking and storing electronic components c is vertically installed between an upper plate 2 and a lower plate 3, and as shown in an enlarged view in FIG. A receiving plate 5 is provided on the back side of the storage tube 4.
The receiving plate 5 is provided with a guide hole 7 for an extrusion rod 6, which will be described later. Inside the storage tube 4, there is a receiving piece 8 that supports the electronic component c from falling, and when this receiving piece 8 is raised inside the storage tube 4 by the upward movement of the pushing rod 6, the electronic component on this receiving piece 8 is lifted. c are successively positioned at the upper end of the storage cylinder 4.

Electronic component extrusion device B This magazine A is removably attached to a bracket 9' provided at the top of the machine stand 9. The machine base 9 has an elevating body 10 having a U-shaped cross section, which is guided by guide rods 11 and 12 provided vertically on the machine base 9, and is driven by a gear train 1 by a reversible motor 13 provided on the machine base 9.
It is raised and lowered by a spiral rod 14 which is rotated in forward and reverse directions via 3'. A push-out rod 6 is provided to pass through the elevating body 10, and the push-out rod 6 has a coil spring 1 fitted in the push-out rod 6 at the U-shaped portion 10'.
The upper end of the push-out rod 6 is pressed against a pin 16 provided on the push-out rod 6, thereby imparting a cushioning action to the push-out rod 6. Further, the upper end of the push rod 6 passes through the guide hole 17' of the guide plate 17 on the upper part of the machine base 9 and the guide hole 7 of the receiving plate 5 of the magazine A.
An extrusion device B is formed so as to come into contact with the lower surface of the.

Printed circuit board intermittent transfer device C As shown in FIG. 2, the printed circuit board intermittent transfer device includes a pair of parallel rails 21 and 2 having grooves 20 on opposing inner sides in which the PC board 1 can fit and move.
1', and a drive rod 22 for the PC board 1 is provided in parallel with these parallel rails. A PC is installed on the drive rod 22.
Fitting into the through holes 18, 18' provided in the substrate 1
Protrusions 19, 19' for holding the PC board 1 are provided, and the intervals between the protrusions 19, 19, 19', 19' are constant m, and the drive rod 22 has a horizontal length as shown by n. It is arranged so that it moves like a flat quadrilateral as shown in m above. That is, as shown in FIGS. 5 and 6, one end of the driving rod 22 is connected via a connecting rod 26 to the free end of a swinging rod 25 that swings back and forth by a face cam 24 rotated by a motor 23.
A horizontal plate 27 protruding from the driving rod 22 contacts one end of a bell crank rod 29 which is oscillated by a face cam 28 which is also rotated by a motor 23.
Therefore, the face cam 24 causes the swinging rod 25 to move to the sixth position.
When the figure swings to the right by a stroke m,
The drive rod 22 moves to the right by m, and the PC board 1 fitted into the protrusions 19, 19' of the drive rod 22 slides to the right by m in the grooves 20 of the parallel rails 21, 21'. At this time, the cam surf ace of the other face cam 28 has just started working, and the bell crank rod 29 is in the 6th position.
If you rotate it counterclockwise in the figure,
The other end of the drive rod 22 is supported by a swing rod 29' which has the same length as the arm of the bell crank rod 29 and rotates in the same way, so that it descends horizontally. Therefore, the protrusions 19 and 19' of the drive rod 22 are connected to the through hole 1 of the PC board 1.
Get out from 8,18'. At this time, the swinging rod 25 is swung in the opposite direction by m by the face cam 24, so the driving rod 22 is horizontally moved to the left by m, and at this time, the bell crank rod 29 is swung clockwise by the face cam 28. When it is set, the drive rod 22
rises horizontally again and connects protrusions 19 and 19' to the next PC.
It fits into the through holes 18, 18' of the board 1, and when the swinging rod 25 next swings, the drive rod 22 moves the PC board 1 to the right in FIG. 6 in the groove 20 of the parallel rail. . In other words, the driving rod 22 moves in the shape of a flat quadrilateral indicated by n in FIGS. 2 and 6.
The PC board 1 is transferred intermittently.

Electronic component suction sticking device D As shown in Fig. 4, another machine stand 36 is installed in the direction perpendicular to the transfer device C on the opposite side of the magazine A with the printed circuit board intermittent transfer device C as the center. A sliding table 37 is provided on the table 36 so that it can reciprocate back and forth in a horizontal state. Magazine A on sliding table 37
A rising wall 38 serving as a vertical guide is provided at the side end, and an inverted L-shaped nozzle support plate 40 is attached to this wall 38.
A rising portion 40' is provided so as to be movable up and down. On this nozzle support plate 40, a number of electronic component suction nozzles 39, which are urged downward, are provided vertically in the same arrangement as the electronic components c on the magazine A. The machine base 36 is provided with a large cam ring 42 which is rotated by a motor 41 and is a front-rear drive part, and a small cam ring 43 which is a vertical drive part. The upper end of a swinging rod 45 having a diameter of 44 is connected to the sliding base 37. Also, the nozzle support plate 4
The other end of the connecting rod 46 whose one end is connected to the rising part 40' of the machine 37 is pivotally connected to the stand 47 of the sliding table 37 by a shaft 47', and the roller 48 which is mounted on the other end is attached to the machine stand 36. It is brought into contact with the lower surface of a parallel rod 50 fixed to the upper end of an elevating rod 49 that can be raised and lowered. In addition, parallel rod 50
extends in the moving direction of the sliding table 37, and has a surface that is parallel to the moving direction of the sliding table 37 and can be contacted by the roller 48 over the entire movement range of the sliding table 37. A follower 52 provided on an arm 51 projecting horizontally below the lifting rod 49 is brought into contact with the small cam ring 43 . With this configuration, the nozzle support plate 40 can be moved back and forth between the magazine A and the printed circuit board intermittent transfer device C, thereby forming an electronic component suction and pasting device D.

In FIG. 2, reference numeral B' denotes a ruler plate of an electronic component, which extends above the magazine A for the purpose of swinging the parallel swinging rods 54 and 55, and exits from above the magazine A. That is, as shown in detail in FIG.
Ruler plate that can cover the top of magazine A
At B', the free ends of swinging rods 54 and 55 of the same length, one end of which is pivoted on the magazine mount 53 of the extrusion device B, are pivoted to an arm piece 56 extending horizontally from the ruler plate B'. A motor 57 is attached to one swinging rod 55.
One end of a connecting rod 59 is pivotally connected to a crank disk 58 which is rotated by a crank disk 58, and the other end of a connecting rod 59 is pivotally connected.

Note that the PC board 1 transferred into the grooves 20, 20 of the parallel rails 21, 21' has glue applied in advance to the portions where predetermined electronic components are to be pasted.

Although the configuration of the glue applicator of this glue applicator is already known, an example of the case where it is incorporated into this embodiment will be described. As shown in FIG. 7, a lifting platform 62 is provided between the parallel rails 21 and 21' of the printed circuit board intermittent transfer device C. Groove 2 of parallel rails 21, 21'
0 is formed by providing stepped portions 63, 63' on the opposing inner sides of the parallel rails 21, 21', and abutting cover plates 64, 64' for groove formation on the upper portions of the stepped portions 63, 63'. , 64' are configured to avoid the movement to the left and right as shown by dotted lines in the figure when the elevator platform 62 is raised. On the other hand, above the lifting platform 62, there is a
A template 66 with a through hole 65 is provided at a position on the PC board 1 where electronic components are attached, and a glue roller 67 can roll on this template. PC board 1 fed into parallel rails 21, 21' with this configuration
When it arrives at the gluing position, the parallel rails 21, 2
As the cover plates 64, 64' on 1' open to the left and right,
The lifting platform 62 rises and lifts the PC board 1 to the stepped portion 6 of the rail.
3, 63' and presses against the template 66, the glue roller 67 rolls on the template to complete the gluing.

Next, the operation of the first embodiment will be explained. Electronic components c are already arranged on the upper surface of the magazine A so as to be placed at predetermined positions on the PC board 1 in a predetermined positional relationship, and the electronic components c are already placed on the PC board 1.
Glue has already been applied to the area where it will be pasted.
It is assumed that the PC board 1 has been sent to the front of the magazine A and has stopped. Therefore, in FIG. 4, when the motor 41 of the electronic component suction and pasting device D is driven, the large cam wheel 42 rotates, the swinging rod 45 is operated, the sliding table 37 is moved toward the magazine A side, and the nozzle support plate 40 is moved. Stop when it reaches magazine A.
Next, the small cam ring 43 works to raise the arm 51 with the follower 52, and as a result, the parallel rod 50 also rises, so the roller 48 at one end of the connecting rod 46 also rises, and as a result, the connecting rod 46 moves along the shaft 47'. Rotating counterclockwise in FIG. 4 about the center, the inverted L-shaped nozzle support plate 40 at the tip of the connecting rod 46 descends vertically, and each electronic component suction nozzle 39 picks up each electronic component c on the magazine A.
be in contact with

By the way, before the suction nozzle 39 comes into contact with each electronic component c, an operation of aligning the surfaces of the electronic component c located at the uppermost position in each storage cylinder 4 to be attracted is performed. This is because during the previous pasting work, the suction nozzle 39 sucked up the electronic components c one by one from the upper end of the storage tube 4.
When moving to the printed circuit board side, the motor 57 is activated. Therefore, the ruler plate B' is advanced by the pair of swinging rods 54 and 55 while remaining parallel to the upper surface of the magazine A. Therefore, the motor 13 of extrusion device B
is rotated by the spiral rod 14 to open the U-shaped portion 10'.
When raised, each push rod 6 pushes up the electronic components c of each storage tube 4 via the receiving piece 8, and all the electronic components c pushed out a little further than the upper end of each storage tube 4 are placed on the bottom surface of the ruler plate B'. is brought into contact with. Then spiral rod 1
4 is reversely rotated to lower the U-shaped portion 10', and at the same time, the ruler plate B' is retreated to the retracted position.

Now, when the suction nozzle 39 comes into contact with each electronic component c, when the nozzle 39 is caused to perform a suction action, each electronic component c is attracted to each nozzle 39. Next, the arm 51 is lowered by the action of the small cam ring 43, and the parallel rod 50 is also lowered, so that the roller 4 of the continuous rod 46 is lowered.
8 is pushed down, the connecting rod 46 rotates clockwise in FIG. 4 about the shaft 47', and each nozzle 39 rises. Next, the large cam wheel 42 works to swing the swinging rod 45 in the opposite direction to the front, and the sliding base 37
retreats. At this time, the connecting rod 46 also retreats, but since the roller 48 moves while always in contact with the lower surface of the parallel rod 50, each nozzle 39 moves while maintaining its raised position, and the rail 2 of the printed circuit board intermittent transfer device C
1 and 21' and stop.

Next, when the elevating rod 49 with the follower 52 rises again due to the action of the cam portion of the small cam ring 43, the nozzle support plate 40 descends.
Numerous electronic component suction nozzles 3 supported by 0
9 each holds a predetermined electronic component c,
Press all at once on the predetermined positions on the printed wiring on the PC board 1 to which glue has already been applied. Therefore, at this point, if the suction action of the nozzle is released and the nozzle support plate 40 is raised by the action of the cam part of the small cam ring 43, the adhesion of the electronic component c is completed.

Next, when the PC board 1 is transferred by the printed board intermittent transfer device C, the PC board 1 to which the electronic components have already been attached becomes a PC board and is transferred next, and the nozzle support plate 40 is transferred. This cycle is repeated after a new PC board 1 is supplied to the lower part.

According to the electronic component suction and pasting device D according to the above embodiment, since the weight of the sliding table 37 and the rising casing 38 is supported by the machine table 36, the driving portion of the sliding table 37, that is, the large cam wheel The load applied to 42 can be reduced. Since the small cam wheel 43 serving as the vertical drive unit only needs to move the nozzle support plate 40 up and down, the load can also be reduced. Therefore, the large cam ring 42 and the small cam ring 43
A small motor 41 is sufficient for rotationally driving the electronic component suction/sticking device D. Therefore, the entire electronic component suction/sticking device D can be downsized, and as a result, the speed of the electronic component sticking work can be increased. can. Further, the nozzle support plate 40 has a vertically extending vertical housing 38.
It is moved up and down while being guided by. Therefore, the suction nozzle 39 descends and rises vertically from directly above the storage tube 4 provided in the magazine A, so that the suction nozzle 3
9 can be approached and separated from each other in a parallel state, and it is possible to accurately hold the electronic component c without tilting or misalignment. This is the same thing when adhering the electronic component c held by suction to the PC board 1. Since the pressing force at the time of adhesion can be applied in the direction perpendicular to the adhesion surface, the electronic component c at the time of adhesion It can be accurately attached to the desired position without tilting or misalignment. Further, in the above embodiment, when the sliding table 37 moves back and forth, the rollers 48 of the connecting rod 46 move while always in contact with the lower surface formed on the parallel rod 50 and parallel to the moving direction of the sliding table 37. , each nozzle can be moved while ensuring that the raised position is maintained.

As described above, according to the article transfer device of the present invention, the device can be made smaller and articles can be transferred reliably.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the PC board, Fig. 2 is a perspective view of an embodiment of the present invention, Fig. 3 is an enlarged vertical sectional view of the bottom of the storage tube of magazine A, and Fig. 4 is a front view of Fig. 2. figure,
5 is a plan view of the printed circuit board intermittent transfer device C in FIG. 2, FIG. 6 is a front view of FIG. 5, and FIG. 7 is an explanatory diagram of the glue application device. A... Magazine, B... Extrusion device, B'... Ruler plate,
C... Printed circuit board intermittent transfer device, D... Electronic component suction and pasting device (transfer device), c... Electronic component, 1... Printed circuit board, 4... Storage cylinder, 36... Machine stand, 37... Sliding table, 38... Standing Wall (vertical guide), 39...
Suction nozzle (article holding means), 42...large cam ring,
43... Small cam ring, 45... Swinging rod, 46... Linking rod, 4
9... Lifting rod, 50... Parallel rod, 51... Arm.

Claims (1)

[Claims] 1. A machine base 36, a sliding base 37 placed on this machine base 36 and movable in the front-back direction, a vertical guide 38 vertically erected on this sliding base 37, and a vertical guide 38 on this vertical guide 38. A support plate 40 that is guided and movable in the vertical direction and has an article holding means 39; a lifting rod 49 that is supported by the machine base and movable in the vertical direction; and a lifting rod 49 that is fixed to the lifting rod 49 and extends in the front-back direction At the same time, a roller 48 (described later) is installed parallel to this direction and over the entire movement range of the sliding table 37.
a parallel rod 50 having a surface that can come into contact with the support plate 4;
0 and a connecting rod 46 having a roller 48 at the other end that is in contact with the surface of the parallel rod 50,
Connecting the sliding table 37 to a front and rear drive unit consisting of a first cam mechanism 42 and 45 provided on the machine table 36,
An article transfer device characterized in that the elevating rod 49 is connected to a vertical drive unit comprising second cam mechanisms 43 and 51 provided on the machine base 36.