JPH0361354B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention provides for a pair of substrate transport chute to be moved vertically relative to a table having positioning pins, so that The present invention relates to a printed circuit board positioning device for positioning a printed circuit board by inserting the pin into a positioning hole of the printed circuit board.

(B) Prior Art In a conventional electronic component automatic mounting machine, as shown in FIG. positioning pin 4a,
4b into the positioning holes 5a, 5 of the printed circuit board 1.
b, and predetermined electronic components were mounted on the printed circuit board 1.

In this case, the support stands 6a, 6b of the substrate transport chute 2a, 2b are configured to be movable in the vertical direction by a drive source (such as a motor). However, as shown in FIG.
a, 5b are oval or have slightly larger diameters (at least one may be a circular hole) in order to smoothly insert the positioning pins 4a, 4b provided on the table 7; After inserting the positioning pins 4a, 4b into the positioning holes 5a, 5b, when mounting electronic components (not shown) on the printed circuit board 1, the positioning holes 5a, 5 must be inserted.
There was a drawback that the backlash of b caused an error in the mounting position of the electronic component.

For this reason, Utility Model Application No. 57-2686, Utility Model Application No. 52-
Publication No. 101945, etc., provides a technique for pressing a printed circuit board toward a board guide chute side with a plurality of pressing bodies biased by a spring while a positioning pin is inserted into a positioning hole of the printed circuit board. There is.

(C) Problems to be Solved by the Invention However, according to the above-mentioned Japanese Utility Model Application Publication No. 57-2686, etc., the position of the pressing body is fixed, so depending on the type of substrate, the position of the pressing body of the substrate may be fixed. If there is a notch at the end, positioning becomes impossible. Further, since the board guide chute is fixed and immovable, the depth of the guide groove of the guide chute must be deep considering the variation in the size of printed circuit boards.

Furthermore, printed circuit boards are not rectangular in the strict sense due to manufacturing variations, and in the case of a method in which one board transfer chute presses the board against the other board transfer chute for positioning, the printed circuit board and the transfer chute This means point contact rather than surface contact. Therefore, sometimes the point of contact is not at the center of the board in the transport direction, but near one of its ends in the transport direction, and when the substrate is pressed against the other transport chute, the If it rotates in the plane direction, accurate positioning becomes impossible.

(d) Means for Solving the Problems Therefore, the present invention provides a method for moving a pair of substrate transport chute in the vertical direction relative to a table having positioning pins so that the prints are guided in the guide grooves of the chute. In a printed circuit board positioning device in which the pin is inserted into a positioning hole of the board to position the board, one of the pair of board transport chute is divided into an upper chute and a lower chute, and the upper chute has the A protruding piece that protrudes into the guide groove is attached so that its attachment position can be changed in the longitudinal direction of the upper chute so that it can come into contact with an intermediate position on the side of the substrate from the side perpendicular to the conveying direction of the substrate, and The upper chute is movable relative to the lower chute in a direction orthogonal to its longitudinal direction, and the substrate in the guide groove is elastically biased by a biasing body toward the other transport chute via the upper chute. The board is positioned in a direction perpendicular to the transport direction, and the board with the pin inserted into the positioning hole of the board is positioned in the transport direction by a transport direction positioning device provided on the table. It is something.

(E) Effect According to the above configuration, the printed circuit board is received from the upstream side, and the printed circuit board slides within the guide grooves of both board transfer chute. In this case, since the upper chute of one of the substrate transfer chute is urged by the urging body, the printed circuit board slides in the guide groove while being elastically urged toward the other substrate transfer chute.

In addition, the printed circuit board that the protruding piece protruding into the guide groove of one of the pair of board transport chute abuts at an intermediate position is elastically biased by the biasing body toward the other transport chute via the upper chute. The substrate is positioned in a direction perpendicular to the transport direction.

On the other hand, by moving the pair of substrate transport chute vertically relative to the table and narrowing the distance between them, the positioning pins on the table are inserted into the positioning holes of the board, and this state is reached. A transport direction positioning device positions the certain substrate in the transport direction.

When handling substrates having different lengths in the transport direction, the protruding piece is moved to a position in the longitudinal direction of the upper chute so as to come into contact with an intermediate position on the side of the substrate, thereby elastically urging the protruding piece.

(f) Embodiment FIG. 2 shows a partially cutaway perspective view of the printed circuit board positioning device of the present invention, and the following will describe it with reference to the drawings.

First, 8a and 8b are a pair of board transport chute that place the printed circuit board 1 in a predetermined position from the upstream side (from the direction of arrow B) by sliding it through guide grooves 9a and 9b, one of which is 8b.
is divided into an upper chute 10a and a lower chute 10b.

At both ends of the upper sheet 10a,
Elongated holes 11a and 11b are formed respectively, and the retaining pin 1
2a, 12b are screwed into the lower chute 10b through the elongated holes 11a, 11b, and the upper chute 10a is inserted into the lower chute 10b in a direction perpendicular to its longitudinal direction within the range of the elongated holes 11a, 11b. In addition to being movable, the lower chute 1
The upper chute 10a is moved from the other conveyor chute 8a by springs 14a and 14b as biasing bodies held by spring holders 13a and 13b fixed to the upper chute 8a.
It is elastically biased in the direction (direction of arrow A).

Reference numerals 15a and 15b are chute support stands, on which the lower part of one of the conveyance chute 8a is fixed, and supports the lower chute 10b of the other conveyance chute 8b so as to be slidable in a direction orthogonal to the longitudinal direction thereof, and supports the printed circuit board 1. Can accommodate any size.

16 are positioning holes 5a and 5b of the printed circuit board 1
The table has positioning pins 4a and 4b upright to be inserted into the table, and guide parts 16a are provided at the bottom of the four corners.
is provided. and the chute support 1
A guide rod 17 extends vertically at both ends of each of the guide rods 5a and 15b, and penetrates the guide portion 16a. That is, the guide portion 16a and the guide rod 17
As a result, the two can be brought into contact and separated.

Reference numeral 18 designates upper and lower rods, which, when raised, rotate the pressure contact lever 19 in the direction of arrow C about its shaft 19a as a fulcrum, and by this rotation, the chute supports 15a, 15
The substrate transport chute 8a, 8b is moved upward via the shaft 4b.

Reference numeral 20 denotes a support member provided on the table 16, which rotatably supports the substrate holding rotation lever 21. Reference numeral 22 designates a suction spring for urging the rotary lever 21 to rotate clockwise in FIG. 2, and its ends are fixed to the spring fixing rod 23 and the rotary lever 21, respectively. These supporting members 2
0, the rotation lever 21, the spring fixing rod 23, and the suction spring 22 constitute a transport direction positioning device.

The lower surface of the intermediate portion of the upper chute 10a is cut out to form a mounting space, and the ten divided pieces 24a...24j are housed in the space and are screwed into place by the setscrews 25... It is removably fixed to the upper chute 10a. Except for the divided piece 24f as a protruding piece, when the other divided pieces are fixed, their tips end in the guide groove 9.
The wall surface 9c forming the depth b is flush with the wall surface 9c. The divided piece 24f is longer than the other divided pieces, and its tip is closer to the guide groove 9 than the wall surface 9c.
b, and does not extend to the inner end surfaces of the upper chute 10a and lower chute 10b, but is located within the groove 9b.

The operation of the above configuration will be explained below. First, when the printed circuit board 1 is inherited from the upstream side (arrow B), the press lever 19 is rotated in the direction of the arrow C by the rise of the upper and lower rods 18, and the chute supports 15a and 15b are set upward.
Therefore, the conveyor of the upstream device (not shown) and the chute support stands 15a, 15b are at the same level in the vertical direction and are in a connected state, and the printed circuit board 1 is moved by the moving mechanism (not shown) to the pair of board transport chute 8a, 15b. 8b guide grooves 9a, 9
Slide b and stop at a predetermined position.

At this time, as mentioned above, the chute support 1
5a, 15b and the table 16 take over the printed circuit board 1 in a state where the relative positional relationship in the vertical direction is far apart, so the positioning pins 4a, 4b and the board holding rotation lever 21 do not get in the way at that time.

Further, the printed circuit board 1 is connected to the guide grooves 9a and 9b.
When sliding, the spring 1 comes into contact with the dividing piece 24f that is a protruding piece protruding into the groove 9b.
4a, 14b, and in the stopped state, the printed circuit board 1 is elastically biased toward one of the board transport chute 8a by the springs 14a, 14b.

When the printed circuit board 1 reaches a predetermined position, the upper and lower rods 18 are lowered, the pressure contact lever 19 is rotated in the direction of arrow C', and the printed circuit board 1 is guided by the guide portion 16a and the guide rod 17, so that the chute support 15a,
15b and the substrate transport chute 8a, 8b are lowered by a predetermined amount. Then, the positioning pins 4a, 4b fixed to the table 16 are inserted into the positioning holes 5a, 5b of the printed circuit board 1.

After the process of inserting the positioning pins 4a and 4b into the positioning holes 5a and 5b, an XY table (not shown) is used to move the board transfer chute 8a, 8b to a component suction nozzle (not shown) for mounting electronic components. ) when moving to the lower position.
The rotation lever 21 is released from the state in which it was held counterclockwise by an engagement rod (not shown) against the biasing force of the suction spring 22, and the suction spring 22 moves the rotation lever 21 toward the printed circuit board 1. Rotate in the direction of pressing. Then printed circuit board 1
The left peripheral edge of one or both of the positioning holes 5a and 5b is aligned with the positioning pin 4 in the direction of the arrow B.
Either one or both of a and 4b will come into contact with each other.

Therefore, the printed circuit board 1 has two parts that differ by 90 degrees from each other.
The positioning pins 4a, 4b are pressed from the direction.
For example, the substrate transport chute 8
By moving a and 8b in the X-Y direction, when electronic components, such as chip components, are mounted on the printed circuit board 1 by an automatic mounting machine, the displacement of the printed circuit board 1 caused by the movement can be completely eliminated.

When the electronic component mounting process is completed,
The XY table is returned to its origin, and the engaging lever rotates the rotating lever 21 counterclockwise to release the bias against the printed circuit board 1. Next, as the upper and lower rods 18 rise, the pressure lever 19 rotates in the direction of arrow C, and the chute supports 15a, 15b
moves upward, and the rotating lever 21 and the positioning pins 4a, 4 are moved upward relative to the printed circuit board 1.
Since b is located below, the printed circuit board 1
is only a pressing force in the direction of one of the conveyor chute 8a, and by pulling out the printed circuit board 1 in the upper right direction in the figure against this pressing force, it becomes possible to send it to the next process.

Here, especially when handling printed circuit boards 1 with different lengths in the transport direction, remove the setscrew 25 of the divided piece 24f located at position P and position the divided piece 24a at the lower left end in the drawing, for example. When you want to remove the setscrew 25, replace the split pieces 24f and 24a, and set the setscrews 25, 2.
When fixed at position 5, the printed circuit board 1 can be pressed at position Q. In this case, the dividing piece 24f is brought into contact with the side of the printed circuit board 1 from the side perpendicular to the conveyance direction of the printed circuit board 1, and this contact point is located at a center position of the side of the board 1 in the conveyance direction. desirable. That is, if it is at either end of the side of the substrate 1 in the transport direction, the substrate 1
Depending on the manufacturing variations, for example, the divided piece 24
If the pressing position of f on the substrate 1 is at the left end in FIG.
Since it is easy to rotate clockwise and accurate positioning is not possible, a central position is preferable. However, if there is a notch at the center of the end of the substrate 1 on the side of the substrate transport chute 8b, this can be dealt with by moving the dividing piece 24f to another position avoiding this notch.

(G) Effects of the Invention As described above, the present invention enables the upper chute to be moved relative to the lower chute in a direction perpendicular to its longitudinal direction, and also allows the printed circuit board in the guide groove to be transferred to the other transport chute via the upper chute. Since the side is elastically biased by the biasing body, there is no need to increase the depth of the guide groove of the board transfer chute even if the size of the printed circuit board varies.

Of course, the printed circuit board is fed and stopped at a predetermined position by sliding in a guide groove, but in the present invention, the printed circuit board is elastically biased by a biasing body via an upper chute. , there is some resistance during sliding, and for example, when a board is transported from the upstream side by a moving mechanism called a transfer, the stopping position is determined with high accuracy and the subsequent positioning operation can be quickly performed. be able to.

In addition, when handling printed circuit boards with different lengths in the transport direction, by changing the mounting position of the protruding piece to the longitudinal direction of the upper chute, the board can be reliably pressed in the direction of the other board transport chute,
It can accommodate printed circuit boards of different lengths, and even if there is a notch in the end facing the protruding piece of the board, it can be pressed reliably by avoiding the notch by the above modification.

Furthermore, as described above, the present invention positions the substrate in the direction perpendicular to the transport direction using a protruding piece or the like, and also positions the board in the transport direction using a transport direction positioning device. Positioning can be performed from two directions, allowing for accurate positioning.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a printed circuit board positioning device in a conventional automatic mounting machine for electronic components, and FIG. 2 is a partially cutaway perspective view of the same device according to the present invention. Explanation of main drawing numbers, 1...Printed circuit board, 4a,
4b...Positioning pin, 5a, 5b...Positioning hole, 8a, 8b...Substrate transfer chute, 9a, 9
b...Guide groove, 10a...Upper chute, 10
b... lower chute, 14a, 14b... spring,
16...Table, 21...Rotating lever, 22...
...Suction spring, 24f...Divided piece (protruding piece), 25
... Set screw.

Claims (1)

[Claims] 1. By vertically moving a pair of board transport chute relative to a table having positioning pins, the pins are inserted into the positioning holes of the printed circuit board guided by the guide grooves of the chute, and the board is moved. In a printed circuit board positioning device for positioning a printed circuit board, one of the pair of board transport chute is divided into an upper chute and a lower chute, and the upper chute has a side portion of the board from a side perpendicular to the transport direction of the board. A protruding piece protruding into the guide groove is attached so that its mounting position can be changed in the longitudinal direction of the upper chute so that the protruding piece can come into contact with the guide groove at an intermediate position, and the upper chute is attached to the lower chute in a direction perpendicular to the longitudinal direction. and positioning the substrate in a direction perpendicular to the conveyance direction by elastically biasing the substrate in the guide groove toward the other conveyance chute via the upper chute by a biasing body. A positioning device for a printed circuit board, characterized in that a positioning device in the transport direction provided on the table positions the board in the transport direction in a state in which the pins are inserted into positioning holes of the board.