JPH0429237B2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention provides a table having positioning pins,
a pair of transport chute, which is arranged above the table and has a positioning hole into which the pin is inserted, and places the printed circuit board in a predetermined position by sliding a guide part from upstream; and the pair of transport chute. The present invention relates to a printed circuit board positioning device comprising: and a vertical moving means for changing the relative perspective relationship with the table.

(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 slightly larger in diameter in order to smoothly insert the positioning pins 4a, 4b provided on the table 7, and the positioning pins 4a, 4b are inserted into the positioning holes 5a, 5b. 5b
When mounting electronic components (not shown) on the printed circuit board 1 after inserting them into the
There was a drawback that the backlash between a and 5b caused an error in the mounting position of the electronic component.

For this reason, Utility Model Application No. 50-42257, Utility Model Application No. 57
JP-A-22273, JP-A-48-57170, and the like have provided techniques for positioning and fixing printed circuit boards using pressing means in addition to positioning pins.

Furthermore, techniques for positioning and fixing the printed circuit board by providing pressing means in two orthogonal directions have been proposed in Japanese Utility Model Application Publication No. 54-26676, Japanese Patent Publication No. 47-49146, and the like.

(C) Problems to be Solved by the Invention However, according to the above-mentioned Japanese Unexamined Patent Publication No. 48-57170, etc., the chute that guides the board is immovable, so considering that there is variation in the size of the printed board, The guide portion of the chute must have a deep depth.

Also, Utility Model Publication No. 54-26676, Special Publication No. 47-49146
According to the publication, when positioning the substrate, the pressing means becomes an obstacle, and the operator must remove it by hand or use a special drive source to remove it.

(d) Means for Solving the Problems Therefore, the present invention provides a table having positioning pins, and a printed circuit board provided above the table with positioning holes into which the pins are inserted, through which a guide portion is inserted from upstream. A positioning device for a printed circuit board comprising a pair of conveyor chute that is placed in a predetermined position by sliding, and an up-and-down moving means that changes the relative perspective relationship between the pair of conveyor chute and the table. One of the substrate transport chute is divided into an upper chute and a lower chute, and the upper chute is movable relative to the lower chute in a direction perpendicular to its longitudinal direction, and the upper chute is elastically biased toward the other transport chute. A biasing means is disposed on the lower chute so that the substrate is pushed against one side in the conveying direction, and a substrate pressing member is disposed on the table to press the substrate against one side in the conveying direction, and when the substrate is fed into the conveying chute, The relative positional relationship between the transport chute and the table is moved far apart by the vertical movement means, so that the positioning pins and the substrate pressing member do not interfere with the feeding of the substrate, and after feeding, the transport chute and the table are moved by the vertical movement means. The table is moved closer to the positioning pin and the positioning pin is inserted into the positioning hole, and the substrate pressing member moves the substrate to one side in the conveying direction, and the upper chute urged by the urging means The substrate is pressed against the other transport chute.

(E) Effect When a printed circuit board is fed into a pair of substrate transport chute, the relative positional relationship between the transport chute and the table is moved far apart by the vertical moving means, and after feeding, the relative positional relationship becomes closer. Therefore, the positioning pin on the table is inserted into the positioning hole of the board, the board pressing member is moved to one side in the transport direction of the board, and the upper chute urged by the biasing means is moved to transport the board to the other side. Press it to the chute side.

(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 chute 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 8 by springs 14a and 14b as urging means held by spring holders 13a and 13b fixed to the upper chute 8.
It is elastically biased in the a direction (arrow A direction).

Reference numerals 15a and 15b are chute support stands, to which the lower part of one of the transport chute 8a is fixed, and supports the lower chute 10b of the other transport chute 8b so as to be slidable in a direction perpendicular to its longitudinal direction.

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.

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 tightened by the set screws 25... It is removably fixed to the upper chute 10a. When the other divided pieces except for the divided piece 24f are fixed, their tips are flush with the wall surface 9c forming the depth of the guide groove 9b. The divided piece 24f is longer than the other divided pieces, and its tip protrudes further into the guide groove 9b than the wall surface 9c, and does not extend to the inner end surfaces of the upper chute 10a and the lower chute 10b, and does not extend into the groove 9b.
It's within.

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 connected, and the printed circuit board 1 is slid along the guide grooves 9a, 9b of the pair of board transport chute 8a, 8b by the moving mechanism (not shown). move 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 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, it comes into contact with the divided piece 24f protruding into the groove 9b, but at that time the springs 14a, 14
This causes the upper chute 10a to be pushed outward against the force b, and in the stopped state, the printed circuit board 1
has a spring 14a on one side of the substrate transfer chute 8a,
It will be elastically biased by 14b.

When the printed circuit board 1 reaches a predetermined position, the upper and lower levers 18 are lowered, the press lever 19 is rotated in the direction of arrow C', and the guide rod 17 is guided by the guide portion 16a, so that the chute supports 15a, 1
5b 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 attach the board transfer chute 8a, 8b to a component suction nozzle (not shown) in order to mount electronic components. When moving to the lower position of 1), the rotation lever 21 is moved from the state in which it is held counterclockwise against the biasing force of the suction spring 22 to the direction in which the rotation lever 21 is pressed against the printed circuit board 1. When the printed circuit board 1 is rotated in the direction of arrow B, the left peripheral edge of one or both of the positioning holes 5a, 5b comes into contact with one or both of the positioning pins 4a, 4b.

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 rotation lever 21 is rotated by an engagement rod (not shown) to release the bias against the printed circuit board 1. Next, as the upper and lower rods 18 rise, the pressure contact lever 19 rotates in the direction of arrow C, the chute supports 15a and 15b move upward, and the rotation lever 21 and the positioning pins 4a and 4b are relatively positioned downward. As a result, the printed circuit board 1 is only pressed in the direction of one of the transport chute 8a, and by pulling out the printed circuit board 1 toward the right in the drawing against this pressing force, it is possible to send it to the next process. Become.

Here, especially when handling printed circuit boards 1 with different lengths in the conveyance direction, remove the setscrew 25 of the divided piece 24f at position P and position the divided piece 24f 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.
5, the printed circuit board 1 can be pressed at the Q position. In this case, the divided piece 24f is brought into contact with the side of the contact board 1 from the side perpendicular to the transport direction of the printed circuit board 1, and this contact point is at the center position of the side of the board 1 in the transport direction. is desirable.

(G) Effects of the Invention As described above, the present invention divides one of a pair of substrate transport chute into an upper chute and a lower chute, and makes it possible to move the upper chute with respect to the lower chute in a direction perpendicular to its longitudinal direction. At the same time, the printed circuit board is elastically biased by the biasing means toward the other transport chute through the upper chute, so even if the size of the printed circuit board varies, the depth of the guide section of the board transport chute can be made deep. There is no need to take it, it can be absorbed. Further, when the guide portion of the printed circuit board slides, there is some resistance, and when the moving mechanism stops the transfer, the stop position is determined with high accuracy, and it is possible to quickly move on to other positioning operations that follow.

In addition, since the table whose relative position with the board transport chute moves near and far is provided with a positioning pin and a board pressing member that can press the printed circuit board against one side in the transport direction, it is possible to When feeding the printed circuit board, the positioning pin and the board pressing member do not get in the way.
Further, no special driving source is required for that purpose.

Further, according to the present invention, the printed circuit board is pressed from two directions orthogonal to each other without special work on the printed circuit board, and the positioning pins are brought into contact with predetermined positions of the positioning holes, thereby achieving high precision. Reliable positioning can be performed.

[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, 25...Set screw.

Claims (1)

[Claims] 1 A pair of conveyors in which a table having positioning pins and a printed circuit board arranged above the table and having positioning holes into which the pins are inserted are placed in a predetermined position by sliding a guide part from upstream. In a printed circuit board positioning device comprising a chute and a vertical moving means for changing the relative perspective relationship between the pair of board transport chute and the table, one of the pair of board transport chute is moved between an upper chute and a lower chute. the upper chute is movable relative to the lower chute in a direction perpendicular to its longitudinal direction, and biasing means is disposed on the lower chute so as to elastically bias the upper chute toward the other transport chute. Further, the table is provided with a substrate pressing member capable of pressing the substrate against one side in the transport direction, and when the substrate is fed into the transport chute, the vertical movement means moves the transport chute and the table relative to each other. The positional relationship is far apart, so that the positioning pin and the substrate pressing member do not interfere with the feeding of the substrate, and after feeding, the conveying chute and the table are moved closer together by the vertical moving means, and the positioning pin and the substrate pressing member are moved into the positioning hole. a positioning pin is inserted into the substrate, the substrate pressing member presses the substrate to one side in the conveying direction, and the upper chute urged by the urging means presses the substrate to the other conveying chute side. Board positioning device.