JPH0132013B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a board positioning device, and particularly to a device for positioning a printed circuit board when electronic components are automatically inserted into the board.

[Prior art]

For example, in an automatic insertion machine that automatically inserts electronic components into a printed circuit board, it is necessary to accurately position the printed circuit board prior to the component insertion process. In this case, this positioning is performed using reference holes provided at predetermined locations on the printed circuit board.

FIG. 4 shows a conventional example of this type of substrate positioning device.

The figure shows only the main parts of the board positioning device, in which 1 shows the printed board guide rail, 2 shows the printed board, 3 shows the positioning pin, 4 shows the positioning drive shaft, and 5 shows the lever. .

Here, the printed circuit board guide rail 1 guides the printed circuit board 2 in a direction perpendicular to the plane of the paper by rotating while coming into contact with the edge portion of the printed circuit board 2.

As an example is shown in FIG. 3, the printed circuit board 2 has a predetermined width C, and reference holes 30 and 31 are provided at predetermined positions. A and B indicate the positions of the reference holes 30 and 31.

The positioning pin 3 is fixed to the tip of a lever 5, and the base end of the lever 5 is fixed to a predetermined position of the positioning drive shaft 4.

In this operation, the guide rail 1 first moves the board 2 through the guide rail 1.
to the designated position. At this time, pin 3 is
Together with the lever 5 and the drive shaft 4, it is moved back from the substrate 2.

Next, once the board 2 is guided to a predetermined position,
Rotate the drive shaft 4 and insert the pin 3 into the reference hole 3 of the board 2.
Insert it at 0,31. Thereby, the position of the substrate 2 guided to the position is fixed. That is,
The substrate 2 is positioned.

[Problem that the invention seeks to solve]

However, in the conventional positioning device described above, the distance B between the reference holes 30 and 31 of the printed circuit board 2 is
Or, if its position changes, the position of the positioning pin 3 must be changed each time. Therefore, when handling various types of printed circuit boards, it is necessary to perform troublesome setup changes for each type. There was a problem that it disappeared.

Further, in the conventional device described above, when positioning, the positioning pin 3 is inserted into the reference hole of the printed circuit board 2.
There was also a problem in that there was no effective means to detect positioning errors in cases where parts were not inserted at positions 0 and 31, and as a result, incorrect insertion of parts was likely to occur.

The present invention has been made in order to solve such problems, and it is an object of the present invention to provide a board positioning device that can automatically position multiple types of printed circuit boards without performing troublesome setup change work. With the goal.

[Means for solving problems]

In order to achieve the above object, the present invention includes a positioning base fixed to a rotating drive shaft and a positioning pin fixed to the positioning base, and the positioning pin is positioned by the rotation of the drive shaft. In a board positioning device that positions a board by fitting it into a reference hole of a board to be processed, a plurality of the positioning tables are arranged so as to be slidable at any position on the drive shaft according to the number of types of boards, and the positioning pins is supported and installed on each of the plurality of slidable positioning bases by an elastic body, and whether or not each positioning pin supported by the elastic body is fitted into the reference hole of the board by rotation of the drive shaft is determined. The present invention is characterized in that a detection device for performing detection is provided on each of the plurality of slidable positioning bases, so that a plurality of substrates having many types of reference hole pitches can be easily positioned.

[Effect]

The above means allows each positioning pin to operate independently. Thereby, even if a board with a different interval or position of the reference holes is inserted, positioning can be performed by operating one of the positioning pins and fitting into the reference hole. On the other hand, the remaining positioning pins collide with the non-perforated portion of the board and automatically retreat, so that they do not interfere with the positioning operation by the other pins. This makes it possible to automatically position multiple types of printed circuit boards without having to perform troublesome setup changes.

Furthermore, by detecting whether or not each positioning pin is securely inserted into the reference hole of the board by a detection device provided on each of the plurality of slidable positioning bases, it is possible to prevent incorrect insertion of parts due to poor positioning. can be prevented.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

FIG. 1 shows the whole of a substrate positioning device according to an embodiment of the present invention.

Moreover, FIG. 2 shows a part thereof.

Furthermore, FIG. 3 shows an example of a printed circuit board to be positioned.

Furthermore, FIG. 5 shows an embodiment of means for detecting whether or not positioning is performed reliably.

First, in FIG. 1, numeral 35 indicates a frame that supports the entire positioning device.

Further, 11 indicates a drive shaft. This drive shaft 11
By receiving the expansion and contraction movement of the air cylinder 17 via the link 18, the plurality of positioning tables 20
A to 20d are simultaneously driven to rotate to a desired angle.

1 and 6 indicate rails, respectively. Each rail 1,
Grooves for accommodating the printed circuit boards 2 are formed in the grooves 6 so as to face each other. One rail 1 is fixed. One end of the other rail 6 is supported by the guide shaft 23 so as to be movable in the direction of arrow D. Further, the other end is engaged with a ball screw 16. This ball screw 16 is connected to the motor 1
4 through a belt 15. As a result, the other rail 6 is driven to move in the direction of arrow D.

21 indicates a stopper. This stopper 21
is driven to move vertically by the air cylinder 36, and restricts the movement of the printed circuit board 2 in the direction of arrow G in an upwardly protruding state. Further, by retreating downward, the printed circuit board 2 inserted in the direction of the arrow G can be taken out in the direction in which the arrow G extends.

Here, the plurality of positioning tables 20a to 20d are
are each constructed as shown in FIG.

FIG. 2 shows the plurality of positioning tables 20a to 20d.
One of them is shown here.

In the figure, 7 indicates a positioning pin. The positioning pin 7 is floatingly supported at the tip of the lever 9 so that it can move vertically (in the direction of arrow F) from the tip while receiving the elastic force of the compression spring 8.
That is, it is elastically supported by the compression spring 8.
At this time, the compression spring 8 elastically biases the positioning pin 7 in a direction that causes the positioning pin 7 to always protrude upward from the tip of the lever 9. The base end of the lever 9 is attached to the fixing bolt 1
0 at a predetermined position on the drive shaft 11. As a result, when the drive shaft 11 is rotated in the direction of arrow E, the positioning pin 7 elastically supported by the tip of the lever 9 is driven upward (toward the printed circuit board 2 side). .

Further, a detection switch 13 is attached to the lower side of the tip of the lever 9 via an attachment plate 12. For example, a micro switch is used as the detection switch 13, and detects the lower end position of the positioning pin 7. When the upper end of the positioning pin 7 is pushed down against the elastic force of the compression spring 8, its lower end protrudes significantly downward, and the lower end position of the pin 7 at this time is detected by the detection switch 13. It's becoming like that.

FIG. 3 shows an example of a printed circuit board positioned by the above-described apparatus.

A printed circuit board 2, an example of which is shown in the figure, is provided with reference holes 30 and 31 at a location a predetermined distance A from one end thereof and at a location B apart from that location. In this case, the distance A and the interval B vary depending on the type of printed circuit board. Further, although the printed circuit board 2 has a predetermined width C, the distance between the rails 1 and 4 can be adjusted according to this width C.

Next, the operation will be explained.

First, the distance between the rails 1 and 6 is adjusted according to the width C of the printed circuit board 2.

Moreover, each fixed position of the plurality of positioning tables 20a to 20d is set respectively. In this case, the fixing position is set corresponding to the position of the reference holes 30, 31 of the printed circuit board 2, but the setting is performed simultaneously for a plurality of types of printed circuit boards. For example, the position of each positioning pin 7 of positioning stands 20a and 20b is at the position of the reference hole of the first type of printed circuit board, and the position of each positioning pin 7 of 20a and 20c is located at the position of the reference hole of the second type of printed circuit board. The positions of the positioning pins 20a and 20d are set to match the positions of the reference holes of the third type of printed circuit board, respectively. in this case,
It is assumed that the distances between the reference holes 30 and 31 of the first to third types of printed circuit boards are all different.

Here, after any one of the above three types of printed circuit board is inserted and guided to a predetermined position, the drive shaft 11 is driven to rotate and the pins 7 of all the positioning tables 20a to 20d are moved. If you drive all at once upwards (toward the printed circuit board 2 side), one of the
Only the pins of the positioning base of the set are selectively inserted into the reference hole 3.
0 and 31 to position the inserted printed circuit board. On the other hand, the pins of the remaining sets of positioning bases abut against the non-perforated portion of the printed circuit board, and are pushed down against the elastic force of the compression spring 8. This makes it possible to independently position multiple types of printed circuit boards from the first to the third without having to perform the troublesome setup work of changing the fixing positions of the positioning tables 20a to 20d midway through. becomes.

Further, whether or not the pin 7 is reliably inserted into the reference hole of the printed circuit board is individually detected for each positioning table by the detection switch 13. Therefore, by monitoring the detection state of the detection switch 13 for each positioning table, it is possible to easily and reliably detect whether or not positioning has been performed reliably, and what type of printed circuit board has been positioned. You will be able to do this.

FIG. 5 shows an example of a positioning state detection circuit using the detection switch 13 described above.

In the same figure, X1×X4 is each positioning base 20
The output contacts of the detection switch 13 are shown for each of a to 20d. S1 to S4 are switches provided for each of the positioning tables 20a to 20d, and by selecting an on/off combination of these switches S1 to S4, conditions for operating the control relay R are set. It's becoming like that. In other words, the type of printed circuit board to be detected is selected. For example, if it is desired to check the positioning state of the first type of printed circuit board, only switches S1 and S2 are set to ON. This results in
Only the movement of the pins of the positioning tables 20a and 20b
It is selectively detected depending on whether or not relay R is in operation. In other words, the positioning base 20
It is detected whether positioning is performed reliably at points a and 20b.

As described above, it is possible to automatically position a plurality of types of printed circuit boards without performing troublesome setup change work, and it is also possible to detect positioning defects at an early stage. This makes it possible to reliably prevent, for example, incorrect insertion of components.

In addition, although the above embodiment describes the positioning of a printed circuit board, the present invention can also be applied to the positioning of a plate-like component other than a printed circuit board, for example, having a reference hole.

Furthermore, in the above embodiment, four positioning stands 20a to 20d were installed in order to accommodate three types of boards having different board hole pitches, but two or three positioning stands were installed depending on the number of types of boards. Of course, it is also possible to install more than one.

〔Effect of the invention〕

As explained above, this invention provides a plurality of positioning pins corresponding to a plurality of types of reference holes, and elastically supports each positioning pin, thereby eliminating the need for troublesome setup changes.
This has the advantage that it is possible to automatically position a plurality of types of printed circuit boards, and it is possible to reliably prevent incorrect insertion of components due to poor positioning.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the overall configuration of a board positioning device according to the present invention, FIG. 2 is a sectional view showing a portion thereof, and FIG. 3 is an example of a printed circuit board to be positioned. 4 is a sectional view showing a part of a conventional substrate positioning device,
FIG. 5 is a circuit diagram showing an example of a configuration for detecting a positioning state. In the figure, 2 is a printed circuit board, 7 is a positioning pin, 8 is a compression spring, 9 is a lever, 10 is a fixing bolt, 11 is a drive shaft, 13 is a detection switch, 20
A to 20d are positioning tables, and 30 and 31 are reference holes for positioning. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A positioning table fixed to a rotating drive shaft;
and a positioning pin fixed to the positioning base, and the positioning pin fits into a reference hole of the board to be positioned by rotation of the drive shaft to position the board, wherein the positioning base is fixed to the positioning base. A plurality of the positioning pins are arranged slidably at arbitrary positions on the drive shaft according to the number of types of boards, the positioning pin is supported and installed on each of the plurality of slidable positioning bases with an elastic body, and the positioning pin is supported by an elastic body, and Each of the plurality of slidable positioning bases is provided with a detection device for detecting whether or not each supported positioning pin is fitted into a reference hole of the board by rotation of the drive shaft, and a detection device that detects whether or not each supported positioning pin is fitted into a reference hole of the board by rotation of the drive shaft is provided on each of the plurality of slidable positioning bases, A substrate positioning device characterized by being capable of easily positioning a plurality of substrates having pitches.