JPH0983196A - Electronic-component loading apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic-component loading apparatus by which the loading operation of an electronic component is performed always in a short time according to the size of a printed-circuit board. SOLUTION: An electronic-component loading apparatus is provided with a moving rail 2a and a fixed rail 2b which guide a printed-circuit board. The moving rail 2a is fixed and bonded to, and held by, the upper end of a vertical part 4-2 at a movement base 4, and it is slid in directions in which it is separated from, and brought close to, the fixed rail 2b on sliding rails 5a, 5b which are fixed to a base 3 at a body apparatus via the movement base 4. A component-cassette holding base 6 which holds a plurality of electronic- component feed cassettes 9 so as to be freely detachable, a nozzle replacement device 7 and an imaging device 9 (a position correction device for an electronic component) are arranged on, fixed to, and installed at, a horizontal part 4-1 at the movement base 4 so as to be parallel to the moving rail 2a, they are moved to the same direction together with the moving rail 2a, and the operating region of a working head is formed to be small according to the printed-circuit board in a small size.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component mounting apparatus for performing a work by moving a movable rail facing a fixed rail in a belt conveyor for conveying a printed circuit board to a predetermined position.

[0002]

2. Description of the Related Art Conventionally, there is a substrate unit manufacturing line including a printed circuit board supply device, a dispenser, an electronic component mounting device, a reflow furnace and the like. The above-described dispenser carries in the printed circuit board supplied from the printed circuit board supply device in the preceding stage, applies solder to a predetermined position on the printed circuit board, and sends the solder to the electronic component mounting device in the subsequent stage. The electronic component mounting apparatus automatically mounts a large number of chip-shaped electronic components such as ICs, resistors, and capacitors on a printed circuit board sent from a dispenser and sends them to the reflow furnace of the subsequent apparatus.

Each of the above-mentioned devices has a belt conveyor for carrying a printed circuit board. The belt of the belt conveyor is slidably arranged under a pair of guide rails provided on both sides of a conveyance path for conveying a printed circuit board so that a board supporting portion having a width of several millimeters can be seen through. . The printed circuit board is supported from below by a substrate supporting portion of a conveyor belt on both sides of the back surface having a width of several millimeters, and is guided while being guided by guide rails at both side ends.

Among them, the electronic component mounting apparatus is described in the above 1
A pair of guide rails, a component supply device that supplies various electronic components mounted on a printed circuit board, a work head that sucks and transfers these electronic components, and a nozzle supply that supplies an appropriate suction nozzle to this work head. Device, a correction device that corrects the position (state) of the electronic component sucked by the suction head by the suction nozzle in accordance with a reference position, and the work head is printed to mount the position-corrected electronic component on a printed circuit board. A drive device for moving the substrate to a predetermined position is provided.

In the above-mentioned component supply device, a tray on which electronic components are placed, a cassette on which a tape containing electronic components is continuously enclosed, and the like are detachably arranged.
As for the suction nozzle, multiple types of nozzles are prepared in advance in the nozzle exchanger according to the size of the electronic component to be sucked,
The suction nozzle selected corresponding to the electronic component to be mounted is detachably attached to the tip of a work head configured to be movable up and down, left and right, and back and forth. The correction device is composed of an image recognition camera, a control circuit, a work head drive device, and the like. The image recognition camera images the electronic component adsorbed by the adsorption nozzle from below, the control circuit compares the position of the imaged image with a reference position that should be correct, and outputs a correction signal. The work head is rotated in accordance with the correction signal and slightly moved in the front, rear, left, and right directions to correct the suction position of the electronic component.

By the way, when the size of the printed board on which the electronic parts are to be mounted is changed, it is necessary to match the width (interval) of the proposed rails with the size of the printed board.
Since the number of types of printed circuit boards on which electronic components are mounted is extremely large, if the guide rail width is manually adjusted every time the type of printed circuit board is changed, the work efficiency decreases. Therefore, in recent years, in order to perform the above-mentioned work at high speed, one of the guide rails is fixed and the other is movable,
The movable rail is moved by power according to the size of the printed circuit board, and the guide rail width can be automatically adjusted.

[0007]

However, although the adjustment of the guide rail width with respect to the printed circuit board is automated as described above and the time required to start the work when the printed circuit board is changed is shortened, the efficiency is improved. Since the mounting work of the electronic parts involves a linking operation of the work head and a device such as a component supply device, a nozzle supply device, or a position correction device, in order to perform this linking operation, the work head is connected to the printed circuit board and each of the above devices. The ratio of time to move between is extremely large regardless of the size of the printed circuit board. For this reason, there is a problem that the reduction of the working time is hindered as a whole and the working efficiency is not improved easily.

[0008] Of course, it is also known that the moving distance of the work head is shortened by moving the component supply device in the same direction as the movable rail moves. No other consideration was given to other important devices to be linked, and there was a complaint that it did not solve the above-mentioned problem.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional circumstances,
An object of the present invention is to provide an electronic component mounting apparatus that always carries out an electronic component mounting operation time in the shortest time according to the size of a printed circuit board.

[0010]

The configuration of an electronic component mounting apparatus according to the present invention will be described below. INDUSTRIAL APPLICABILITY The present invention is applied to an electronic component mounting apparatus in which the distance between a pair of rails that holds and conveys a printed circuit board is variable so as to correspond to the width of the printed circuit board.

According to another aspect of the present invention, there is provided an electronic component mounting apparatus, wherein a movable rail of the pair of rails that moves corresponding to a width of the printed circuit board, and a movable rail disposed outside the movable rail are mounted on the printed circuit board. Corresponding to a plurality of types of electronic components provided between the component supply means and the movable rail, the component supply means having a detachable electronic component supply cassette for supplying electronic components for Nozzle exchanging means capable of exchanging the suction nozzle, and position correction means arranged between the component supply means and the movable rail for correcting the suction position of the electronic component sucked by the suction nozzle from the component supply means. Both are configured so that they can move together.

According to another aspect of the present invention, there is provided an electronic component mounting apparatus, wherein a movable rail of the pair of rails that moves corresponding to the width of the printed circuit board is mounted, and the electronic component mounting apparatus is disposed outside the movable rail and mounted on the printed circuit board. Electronic component supply cassette for supplying electronic components for detaching, and a component supply means that is arranged between the component supply means and the movable rail and is attached by an adsorption nozzle from the component supply means. A position correction unit that corrects the suction position is integrally provided so as to be movable together.

According to another aspect of the present invention, there is provided an electronic component mounting apparatus, wherein a movable rail of the pair of rails that moves corresponding to the width of the printed circuit board is mounted, and the electronic component mounting apparatus is disposed outside the movable rail and mounted on the printed circuit board. Corresponding to a plurality of types of electronic components provided between the component supply means and the movable rail, the component supply means having a detachable electronic component supply cassette for supplying electronic components for The suction nozzle and the nozzle exchanging means that are exchangeable are integrally provided so as to be movable together.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A is a plan view showing a schematic configuration of an electronic component mounting apparatus according to one embodiment,
The same figure (b) is a side view. Further, FIG. 2 schematically shows a perspective view of the electronic component mounting apparatus. FIG.
1 (a), (b) and FIG. 2, an electronic component mounting apparatus 1 (hereinafter referred to as a main body apparatus 1) guides a printed circuit board 1
It is provided with a pair of guide rails 2a and 2b. The pair of one guide rails 2b are fixed rails and are fixed to the base 3 of the main body device 1. The other guide rail 2 a is a movable rail and is fixed to the moving base 4. The movable base 4 is composed of a horizontal portion 4-1 and a vertical portion 4-2 and has a hook-shaped cross section. The movable rail 2a is fixedly held at the upper end of the vertical portion 4-2. ing. The moving base 4 is slidably engaged with slide rails 5a and 5b fixed to the base 3 of the main body 1 in parallel with two in a direction intersecting the fixed rail 2a and the movable rail 2b at right angles. As indicated by the double-headed arrow A, the slide rails 5a and 5b slide. On the horizontal portion 4-1 of the moving base 4, the component cassette holding base 6, the nozzle exchanger 7, and the image pickup device 8 are fixed and arranged in parallel with the movable rail 2a.

A plurality of electronic component supply cassettes 9 (see FIG. 2) are detachably arranged and held on the component cassette holder 6, and the component cassette holder 6 and the plurality of electronic component supply cassettes 9 are used. An electronic component supply device is formed as a whole. The electronic component supply cassette 9 is a reel 9 at the rear of which electronic components loaded on the tape 9-1 are loaded.
-2, and electronic parts are sequentially fed to the supply port 9-3 at the front end.

The nozzle exchanger 7 detachably holds a plurality of types of suction nozzles of different sizes, and supplies a suction nozzle suitable for an electronic component to be currently mounted to the tip of a work head (not shown) in a replaceable manner. To do.

The image pickup device 8 has two built-in cameras, and picks up an image of the electronic component sucked from the supply port 9-3 of the electronic component supply cassette 9 by the suction nozzle of the working head from the bottom to display its image. The data is output to a control unit (not shown).

As shown in FIG. 2, conveyor belts 11a and 11 are provided at the lower ends of the fixed rail 2a and the movable rail 2b.
b are provided respectively, and the belt drive motors 12a and 12b are provided.
It is driven by each and rotates. These conveyor belts 11
Both ends are placed on a and 11b, guided by the fixed rail 2a and the movable rail 2b, and the printed circuit board 13 is carried into the work area from left to right as indicated by arrow B in the figure.
The printed circuit board 13 that has been carried in comes into contact with a stopper 14-1 (hereinafter, refer to FIG. 1) that rises from below the guide rail 2b in the front in the transport direction, and stops, and further from the bottom in the rear in the transport direction. Positioning device 14-2 ascending
Thus, the stopper 14-1 is pressed and fixed in position.

The work head for mounting the electronic parts on the printed circuit board 13 is not particularly shown, but the guide rails 2a, 2b, the parts cassette holder 6, the nozzle exchanger 7, and the image pickup device 8 are arranged. On the work area provided,
The drive is controlled by the control unit via the drive mechanism so as to freely move up and down, left and right, and front and back. Working head
On the nozzle exchanger 7, the suction nozzle currently held by the head and the appropriate suction nozzle held by the nozzle exchanger 7 are exchanged, then moved to the component cassette holder 6 and designated by the work procedure. A predetermined electronic component is adsorbed from the supply port 9-3 of the electronic component supply cassette 9, and then the holding state of the adsorbed electronic component is imaged on the imaging device 8 and further controlled based on the imaging result. After the position is corrected by the unit, it is moved onto the printed circuit board 13 and the electronic component is mounted at a predetermined mounting position. The printed circuit board 13 on which electronic components are mounted is carried out by a conveyor belt 11a and 11b again when the stopper 14-1 is lowered, to a reflow furnace (not shown) disposed in the right rear stage.

In the vertical portion 4-2 of the moving base 4, one ends of the drive feed screw 15a and the driven feed screw 15b are respectively attached to feed screw nuts 16a and 16b which are fixed through the vertical portion 4-2. Each is screwed and supported. The other end of the driven feed screw 16b is rotatably and axially fixed and supported by a bearing 17 fixed to the base 3 of the main body 1. The drive feed screw 16a, which is longer than the driven feed screw 16b, is rotatably and axially fixed to another bearing 18 of the base 3 of the main body device 1 at an intermediate portion having the same length as the driven feed screw 16b. And the other end is further supported by another bearing 19.

The drive feed screw 15a is, on the one hand, a drive pulley 21 fixed to the drive feed screw 15a in the vicinity of the bearing 18, and the belt 2 engaging with the drive pulley 21.
2 and the driven feed screw 15 through the driven pulley 23 which is engaged with the belt 22 and fixed to the other end of the driven feed screw 15b.
b. On the other hand, a pulley 25 fixed to the drive feed screw 15a, a belt 26 engaged with the pulley 25, and a motor shaft pulley 27 engaged with the belt 26 near the bearing 19 (see also FIG. 2). It is connected to the rail width variable drive motor 28 via the. When the rail width variable drive motor 28 rotates in both forward and reverse directions, the drive feed screw 15a and the driven feed screw 15b rotate in both forward and reverse directions, and this rotation causes the drive feed screw 15a and the driven feed screw 15a to rotate as described above. The movable rail 2a screwed to one end of the screw 15b via the feed screw nuts 16a and 16b moves parallel to the direction in which the movable rail 2a comes in contact with and separates from the fixed rail 2b. By performing this movement in advance prior to the electronic component mounting work, the guide rail width is set corresponding to the width of the printed circuit board 13.

A disc-shaped encoder 29 is fixed to the tip of the rotary shaft of the rail width variable drive motor 28 so as to rotate coaxially, and an encoder sensor 30 is provided so as to sandwich the peripheral portion of the encoder 29 from both sides. It is arranged integrally with the rail width variable drive motor 28. The rotation of the variable rail width drive motor 28 is detected by the encoder sensor 30 as the rotation of the encoder 29, and the light reception (OFF) / light shielding (ON) output by the detection is recognized by a control unit (not shown).

The guide rail width is set by first moving the moving base 4 in a direction away from the fixed rail 2b,
The origin protrusion 31 provided on the outside of the leg portion whose moving base 4 engages with the slide rail 5 a is
The origin sensor 32 provided in the vicinity of the end farthest from the fixed rail 2b of "a" detects and passes through, and the moving base 4 stops temporarily. Subsequently, the movable base 4 moves in a direction approaching the fixed rail 2b to absorb the mechanical play existing in the drive transmission member, and the origin protrusion 31 is detected by the origin sensor 32 again. The movement reference position (origin) is set. Subsequently, the movable base 4 continues to move in the same direction to move the movable rail 2a to the next width, and the controller controls the rotation amount of the rail width variable drive motor 28 while referring to the output of the encoder sensor 30. The guide rail width is set accurately.

Along with the movable rail 2a moved by the moving base 4, the component cassette holder 6, the nozzle exchanger 7 and the image pickup device 8 on the moving base 4 move in the same direction. FIG. 3 schematically shows a moving state of each device that moves together with the movable rail 2a. This figure is a view (view from arrow C in FIG. 1) viewed from the conveying direction of the guide rails 2a and 2b, and shows only main devices. As shown in the figure, the movable base 4 is moved from the outside to the inside to move and position the movable rail 2a from the position P1 shown by the solid line in the figure to the position P2 shown by the chain double-dashed line in the figure. . At this time, from a position intermediate between the positioning position P2 and the fixed position P3 of the fixed rail 2b, that is, the center position P4 of the printed circuit board 13 to be carried in, to the stop position P5 of the nozzle exchanger 7 and the imaging device 8 which have moved similarly. The distance is a distance a, and the distance to the stop position P6 of the similarly moved parts cassette holder 6 is a distance b.

At this time, the component cassette holder 6, the nozzle exchanger 7 and the image pickup device 8 are, for example, as in the conventional case,
If the movable rail 2a is fixed to the main body apparatus base 3 at the positions P8 and P7 indicated by the solid lines in the figure and only the movable rail 2a moves to the position P2, it is assumed that the fixed position is the center position P4 of the printed circuit board. The distances c and d to the positions P7 and P8 of the respective devices are always larger than the above-described distances a and b in the case of the present embodiment in which the respective devices make the same movement. That is, in this embodiment, as the size of the printed circuit board 13 becomes smaller, the distance that the work head moves between the printed circuit board 13, the component cassette holder 6, the nozzle exchanger 7, and the image pickup device 8 is shortened. It That is, the working time is shortened.

Not only that, but if the component cassette holder 6, the nozzle exchanger 7 and the image pickup device 8 are fixed at the positions P8 and P7, those fixed devices become an obstacle. Since the movable rail 2a cannot move to the right of the position P1, the size of the printable board that can be carried in is restricted between the positions P3 and P1. On the other hand, in the present embodiment, each of the above-mentioned devices moves in the same direction together with the movable rail 2a, so that the shortest moving distance of the work head according to the size of the printed circuit board is maintained, and the rear of the moving base 4 (in the figure As long as there is a sufficient space (distance e in the figure) on the right side, it is possible to move further, and therefore mounting work can be performed corresponding to more types of printed circuit boards.

[0027]

As described above, according to the present invention,
Since the movable rail, the component supplying means, the nozzle exchanging means, and the position correcting means are integrated, the working area of the working head becomes smaller according to the small-sized printed circuit board, so that the working time is shortened and the working efficiency is improved. improves. In addition, since the structure is as described above, there is no device that obstructs the width expansion and movement of the movable rail, which expands the movable range in the same space as the conventional one, thus increasing the types of compatible boards and increasing the applications. It is convenient to enlarge.

[Brief description of drawings]

1A is a plan view showing a schematic configuration of an electronic component mounting apparatus according to an embodiment, and FIG. 1B is a side view thereof.

FIG. 2 is a schematic perspective view of an electronic component mounting apparatus according to an embodiment.

FIG. 3 is a diagram showing a moving state of each device that moves together with a movable rail.

[Explanation of symbols]

 1 Electronic component mounting device (main unit) 2a Movable rail (guide rail) 2b Fixed rail (guide rail) 3 Base 4 Moving base 4-1 Horizontal part 4-2 Vertical part 5a, 5b Slide rail 6 Component cassette holder 7 Nozzle Exchanger 8 Imaging Device 9 Electronic Component Supply Cassette 9-1 Tape 9-2 Reel 9-3 Supply Ports 11a, 11b Conveyor Belts 12a, 12b Belt Drive Motor 13 Printed Circuit Board 14-1 Stopper 14-2 Positioning Device 15a Drive Feed screw 15b Driven feed screw 16a, 16b, 17, 18, 19 Bearing 21 Drive pulley 22 Belt 23 Driven pulley 25 Sticking pulley 26 Belt 27 Motor shaft pulley 28 Rail width variable drive motor 29 Encoder 30 Encoder sensor 31 Origin protrusion 32 Origin sensor

Claims (3)

[Claims] 1. An electronic component mounting apparatus in which an interval between a pair of rails for holding and transporting a printed circuit board is variable so as to correspond to a width of the printed circuit board, wherein a width of the printed circuit board among the pair of rails. A movable rail that moves in correspondence with the movable rail, a component supply means that is detachably provided on the outside of the movable rail, and that has an electronic component supply cassette that supplies electronic components to be mounted on the printed circuit board, and the component supply means. Disposed between the movable rail and the movable rail, and a nozzle exchanging means that is capable of exchanging suction nozzles corresponding to a plurality of types of electronic components provided in the component supplying means, and that is disposed between the component supplying means and the movable rail. And a position correcting unit that corrects the suction position of the electronic component sucked by the suction nozzle from the component supply unit, so as to be movable together. Electronic component mounting apparatus according to symptoms. 2. An electronic component mounting apparatus in which an interval between a pair of rails for holding and carrying a printed circuit board is variable so as to correspond to a width of the printed circuit board, wherein a width of the printed circuit board among the pair of rails. A movable rail that moves in correspondence with the movable rail, a component supply means that is detachably provided on the outside of the movable rail, and that has an electronic component supply cassette that supplies electronic components to be mounted on the printed circuit board, and the component supply means. And a movable rail, and position correction means for correcting the suction position of the electronic component sucked by the suction nozzle from the component supply means are integrally provided movably together. apparatus. 3. An electronic component mounting apparatus in which a distance between a pair of rails for holding and carrying a printed circuit board is variable so as to correspond to a width of the printed circuit board, wherein a width of the printed circuit board among the pair of rails. A movable rail that moves in correspondence with the movable rail, a component supply means that is detachably provided on the outside of the movable rail, and that has an electronic component supply cassette that supplies electronic components to be mounted on the printed circuit board, and the component supply means. And a movable rail, the nozzle exchanging means for exchanging suction nozzles corresponding to a plurality of types of electronic components included in the component supplying means are exchangeably integrally provided. Parts mounting device.