JPS6034232A - Automatic parts mounting system - Google Patents

Abstract

PURPOSE:To reduce the strength or driving force of guide or drive mechanism for displacing a movable head by gearing the gear made on a rotary holder with the rack teeth on a rack board secured to the system fixing section then moving. CONSTITUTION:A head 3 movable in X, Y directions is mounted with an up/ down sliding board 9 while slidably in Z-axis. Said board 9 is projected with a shaft 12 in X-axis to journal a rotary holder 13 rotatably. Gears 14 are provided on the rotary holder 13 while parts holders 5A, 5B, 5C are fixed radially on the outercircumference. A rack board 18 formed with rack teeth 18a is secured to the system fixing section along Y-axis where the motions of head 3 along X- axis and the up/down board 9 along Z-axis will cause gearing of the holder 13 gear 14 and the rack teeth 18a to rotate the holder 13 by predetermined angle thus to bring usable state.

Description

[Detailed Description of the Invention] This invention holds components fed by a component feeding device using a component holder, moves them three-dimensionally, and automatically mounts them at a predetermined position on a mounting member such as a printed circuit board. Regarding automatic parts mounting equipment.

FIG. 1 shows an example of a component mounting apparatus to which the present invention is applied, which is capable of mounting various types of chip-shaped electronic components onto a predetermined printed circuit board quickly and with high precision.

That is, chip-type electronic components such as chip-type capacitors, resistors, diodes, and transistors are supplied by type from each hopper case 1 onto each rail 2, and are sequentially moved toward the tip of the rail 2 by slight vibration in the longitudinal direction of the rail 2. will be sent to.

On the other hand, a second guide part Gll is provided slidably in the X-axis direction along the first guide part Gl provided in the device main body,
The movable head 3 is mounted along this second guide portion GII so as to be slidable in the Y-axis direction perpendicular to the X-axis within a horizontal plane.
By controlling the step motor that drives the second guide part GII and the step motor that drives the moving head 3 by a controller (not shown), the moving amount of the moving head 3 in the X-axis direction and the Y-axis direction can be controlled. It has become.

A component holder 5 is attached to this moving head 3, which attracts components using the negative pressure from the negative pressure supply pipes 4a and 4b. Moves up and down in the axial direction.

The component held by suction by the component holder 5 is marked X.

After being moved three-dimensionally along the y and z axes and placed and fixed on the mounting base 7- by suction, adhesion, etc. in advance, and mounted at a predetermined position on the printed circuit board 8 on which a solder layer is printed, for example. It is fixed through post-processes such as heat treatment.

In such automatic component mounting equipment, rather than using a common component holder for all components, it is possible to use a component holder for irregularly shaped components, for example, depending on the size and shape of one component.

It is better to use dedicated component holders for cylindrical chips, ICs, etc. to hold components more efficiently and reliably.

Therefore, in order to easily change the component holder used depending on the type of component, multiple component holders of different types are placed radially around the outer circumferential surface of a rotary holder that is rotatably provided on the moving head. It is conceivable that a desired component holder can be selected and used by rotating the mounting and rotating holder manually or by a drive source such as a step motor built into the moving head.

However, manually rotating the rotary holder to select the required component holder each time according to the type of component is complicated and may lead to erroneous operation, which impedes automation of component mounting.

In addition, if the moving head is provided with a separate drive source such as a step motor, the moving head becomes heavy, and this moving head becomes
The first one guides in the Y-axis direction. Strength is also required for the second guide portions Gl, GII and their drive mechanism, which increases the weight of the entire device and increases production costs.

This invention has been made in view of the above points, and is capable of automatically selecting a required component holder without providing a separate drive source for rotating the holder with the component holder attached to the moving head. An object of the present invention is to provide an automatic component mounting device that can be used as an automatic component mounting device.

Therefore, in the automatic component mounting device according to the present invention, a shaft is provided protruding in the X-axis or Y-axis direction on a member attached to a movable head that moves in the X-axis and Y-axis directions so as to be displaceable in the X-axis direction. A rotary holder is rotatably supported on the rotary holder, gears are concentrically fixed to the rotary holder, and a plurality of different component holders are radially attached to the outer peripheral surface of the rotary holder, so that the gears can be engaged with the gears on the device fixing part. A rack plate with rack teeth formed thereon is fixed, the gears of the rotary holder are engaged with the rack teeth of the rack plate, and the movable head is moved along the rack plate, thereby rotating the rotary holder and removing the required parts. The holder can be selected.

Hereinafter, with reference to FIG. 2 of the accompanying drawings, an embodiment will be described in which the present invention is applied to the automatic loading bag 4-place for chip-type electronic components shown in FIG.

A vertical sliding plate S is attached to a moving head 3 that moves in orthogonal X- and Y-axis directions in a horizontal plane, and two sets of long holes 9a and guide screws 10 are provided.
It is guided by a guide groove 3a and slidably mounted in the vertical X-axis direction, and is constantly applied an upward biasing force by a spring (not shown), and this biasing force is applied only when compressed air is supplied from the compressed air supply pipe 6. descend against the
1 allows the downward stroke to be adjusted.

A shaft 12 is provided on this vertically sliding plate 9 to protrude in the X-axis direction, and a cylindrical rotary holder 13 is rotatably supported by this fixed shaft 12.

A gear 14 is concentrically fixed to the rotary holder 13, and a plurality of different component holders SAT 5B15C are radially attached to the outer peripheral surface at intervals in the circumferential direction.

These component holders 5A, 5n, and 5c have bits of different types attached to the cylindrical base 15 so as to be slidable in the longitudinal direction, and project into the long holes 15a provided in the cylindrical base 15 and the bits 16. Pin 16. This restricts the amount of movement of the bit 16 and prevents relative rotation between the base 15 and the bit 16.

A compression spring housed in the base 15 constantly biases the bit 16 in the projecting direction.

In addition, the shaft 122 and the rotating boulder 16. and component holder 5A,
513 base 15. A through hole is provided in each bit 16,
Negative pressure (1) Negative pressure from the supply pipes 4a and 4b is supplied to the tip of the bit 16 of the component holder in the X-axis direction.

In this embodiment, the component holder 5A is for a single component and has a bit with a small through hole diameter, the component holder 5B is for an IC and has a bit with a large through hole diameter, and the component holder 5C is for an adhesive. It has a conical bit with no through holes.

Further, the base of a bent U-shaped positioning plate 17 made of an elastic metal material is fixed to the lower sliding plate 9, and a notch 17a is provided in the center of its free end, so that the base of the component holder 15 is this notch 17. By engaging with the component holder 5
Any one of A to 5C is made to accurately match in the X-axis direction.

On the other hand, the rack plate 18 on which the rack teeth 18a are formed is fixed to the device fixing part with fixing screws 19, 19 along the Y-axis direction, and the movable head 3 can be moved in the X-axis direction and Due to the axial movement, the gear 1 of the rotary holder 13
4 can be fitted onto the rack teeth 18a.

Next, the operation of this embodiment will be explained.

When changing the component holder to be used, before picking up the components, move the moving head 3 from the illustrated state in the X-axis direction to position the gear 14 directly above the rack teeth 18a of the rack plate 18, Supplying compressed air from the compressed air supply pipe 6,
After lowering the vertical sliding plate 9 and aligning the gear 14 with the rack teeth 18a, the movable head 3 is moved in the Y-axis direction (the direction opposite to the arrow may be used), and the rotary holder 13 is rotated by a predetermined angle. By aligning the component holders 5A or 5C in the X-axis direction, the device can be brought into use.

The amount of movement of the moving head B in the Y-axis direction at this time is determined by the diameter of the gear 14 and the rotation angle to the selected bit, but if the amount of movement of the moving head B in the Y-axis direction by the controller is slightly different However, the component holder is located in the notch 17. of the positioning plate 17. is accurately positioned in the X-axis direction.

In the second embodiment, the rack plate 18 is provided in the Y-axis direction, but if the shaft 12 is provided protruding in the Y-axis direction, the rack plate may be provided in the X-axis direction. Furthermore, it goes without saying that the X, Y, and Z axes can be set in arbitrary directions that are perpendicular to each other.

As described above, in the automatic component mounting device according to the present invention, a rotary holder is pivotally supported on a movable head that moves in the X-axis and Y-axis directions so as to be displaceable in the X-axis direction, and is fixed concentrically to the rotary holder. By moving the installed gear to suit the rack teeth of the rack plate fixed to the device fixing part, the rotary holder can be rotated and the desired component holder can be selected from among the plurality of different component holders attached to the outer peripheral surface of the rotary holder. Since the movable head can be selected, there is no need to provide a drive source for rotating the rotary holder, and the movable head can be made lighter. The strength and driving force of the guide and drive mechanism can be reduced, the weight of the entire device can be significantly reduced, and it can be supplied at low cost.

In addition, the selection of the component holder is determined by the amount of movement of the moving head in one direction, and the movement of the moving head is controlled by the controller with extremely high precision. Component holders can be automatically selected and used, significantly increasing productivity.
It has an excellent effect on

Note that component holders are not limited to those that attract components using negative pressure, but may also attract components using electromagnetic force.

The parts may be held by mechanical clamping or gripping.

Furthermore, as in the above-described embodiment, a jig for applying wire solder, ultraviolet curing adhesive, etc. can also be selectively used as a modification of the component holder.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of an automatic component mounting apparatus to which the present invention is applied, and FIG. 2 is a perspective view showing essential parts of an embodiment of the present invention. 3... Moving head 4a, 4b... Negative pressure supply pipe 5
1 SAt 5B+ 5c...Component holder 6...Compressed air supply pipe 7...Mounting stand 8...Printed circuit board (
Mounted members) 9... Vertical sliding plate 12... Shaft 13... Rotating holder 14... Gear 15/cylindrical base 16... Bit 17... Positioning plate 18... Rack plate -11= 1st D゛1

Claims (1)

[Claims] 1. A holder is attached to a movable head that moves in the X-axis direction and the Y-axis direction orthogonal to each other so as to be displaceable in the X-axis direction orthogonal to the X-axis and the Y-axis, and a component attached to this holder. In an automatic component mounting device that holds a component at the tip of a holder, moves the component three-dimensionally, and automatically mounts the component at a predetermined position on a mounted member such as a printed circuit board. The holder is a rotary holder rotatably supported by a shaft protruding in the X-axis or Y-axis direction on a member mounted on the movable head so as to be displaceable in the X-axis direction, and A gear is fixed, a plurality of different component holders are radially attached to the outer circumferential surface at intervals in the circumferential direction, and a rack plate having rack teeth that can engage with the gear is fixed to the device fixing part. An automatic parts mounting device featuring: