JPH06152196A - Method and mechanism for deciding phase of nozzle - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the reliability in high-speed operation without performing phase alignment of the component mounting nozzle when returning to the origin angle position. A serrated engagement portion 12 is formed along a lower end of a nozzle 11 provided in a nozzle block of a rotary-type multiple head electronic component mounting device so as to be fitted from above.
a includes a first phase determining member 12 that meshes with a pin 11a protruding from the side surface of the nozzle, and a second phase determining member 13 disposed above the first phase determining member. Therefore, when the second phase determining member is separated from the first phase determining member, a relative phase shift is allowed. When engaged with the member, the relative phase shift between the first and second phasing members is eliminated and the nozzle block can be phased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, by adsorbing an electronic component and inserting and mounting it at a predetermined position on a printed board
Nozzle phasing method and nozzle phasing mechanism relating to an electronic component mounting apparatus for automatically mounting electronic components, and particularly capable of returning an angular position of a nozzle for adsorbing an electronic component to a predetermined origin position It is about.

[0002]

2. Description of the Related Art Conventionally, for example, a rotary type multiple head electronic component mounting apparatus is constructed as shown in FIG. In the figure, the electronic component mounting apparatus 1 takes out the components sequentially supplied from the component supply unit 2 from the loader unit 3 and mounts them on the mount unit 4.
It is brought to a predetermined position on the printed circuit board which is fixedly held by the XY table section 4a supported by and is mounted on this printed circuit board by the action of the rotary nozzle section 5.
The printed board on which the components are mounted in this manner can be discharged from the unloader unit 6.

Here, the above-mentioned respective parts 2 to 6 can be driven and controlled by the electrical equipment part 7 and the drive part 8. Further, the electrical component section 7 and the drive section 8 are the operation section 1
It can be appropriately operated and controlled by a.

The rotary nozzle section 5 is constructed as shown in FIG. That is, in FIG. 5, the rotary nozzle unit 5 is composed of a rotary head including a nozzle block 5b having a plurality of nozzles 5a (five in the case shown). The rotary head is rotationally driven so as to be sequentially stopped at twelve stations arranged at equal angular intervals, as schematically shown in FIG.

That is, at the first station, electronic parts are supplied from the parts cassette 5c. In the second station, the nozzle block 5b is rotated together with the nozzle 5a by a specified angle of NC data, for example,
The mounting direction of the sucked electronic component is selected.

Subsequently, the thickness of the sucked electronic component is detected in the third station, and the amounts of positional deviation and angular deviation are calculated in the fourth station by, for example, image processing. Here, the positional shift data is transferred to the XY table unit 4a, and the XY table unit 4a is moved and adjusted based on the positional shift data,
The positional deviation is corrected. Further, at the sixth station, the nozzle block 5
By rotating b together with the nozzle 5a, the angular deviation can be corrected.

After that, at the seventh station, the nozzle 5a inserts and mounts the electronic component at a predetermined position of the printed circuit board placed on the XY table. Here, in the third and fourth stations, when the electronic component sucked by the nozzle is defective in component shape or has an abnormal suction, the electronic component is not mounted on the printed circuit board. , At the ninth station, they are discarded in a parts discard box (not shown).

With the above, the mounting of the electronic component is completed, and subsequently, the preparation for the suction of the next component is performed. First, at the tenth station, the nozzle corresponding to the next component is selected from the five types of nozzles. continue,
At the eleventh station, the angular position of the selected nozzle 5a is returned to the original angular position. Finally, the selected nozzle is checked at the twelfth station.

Here, the return of the nozzle to the origin angular position at the eleventh station is performed by a nozzle origin returning mechanism 9 as shown in FIG. In the figure, the nozzle origin returning mechanism 9 includes a gear portion 5d (FIG. 7) provided along the outer peripheral surface of the nozzle 5a.
(See (B)) via a gear 9b rotatably supported by a support portion 9a, a motor 9c for rotationally driving the gear 9b, a cam 9d and a lever 9e.
It comprises a swing mechanism 9g for swinging the support portion 9a toward the nozzle block by a servo motor 9f.

Further, as shown in FIG. 7 (B), the nozzle 5a has a gear portion 5d in which a stopper pin 5e is planted, and the nozzle 5a abuts on a stopper 9h fixed to the nozzle block. The rotation of the gear 5b can be stopped at the origin angular position of 5a. The motor 9c can be driven and controlled by the motor control circuit 9i.

According to the nozzle origin returning mechanism 9 thus constructed, the swinging mechanism 9g is operated first, so that
The gear 9b is brought into contact with the gear portion 5d of the nozzle 5a. From this state, when the motor 9c is rotationally driven by the motor control circuit 9i, the nozzle 5a is rotated according to the rotation of the gear 9b. As a result, when the stopper pin 5e of the nozzle 5a comes into contact with the stopper 9h, the rotation of the nozzle 5a is stopped, the motor 9c is stopped at the same time, and the swing mechanism 9g causes the nozzle origin returning mechanism 9 to retract. To be done. Thus, the nozzle origin return is completed.

[0012]

However, according to the nozzle origin returning mechanism 9 as described above, the gear 9b is brought into contact with the gear portion 5d of the nozzle 5a, and depending on the angular position of the nozzle 5a. Is this gear 9b
However, a phase shift occurs with respect to the gear portion 5d. For this reason, the tooth tips of the gear 9b and the gear portion 5d abut each other, causing wear.

Therefore, there is known a structure in which the gear 9b is replaced with a rubber roller. When a rubber roller is used, phase shift does not occur, but the rubber roller is likely to wear due to contact with the gear portion 5d of the nozzle 5a. Therefore, the rubber roller has a relatively short life and has a problem in durability.
In addition, abrasion of the rubber roller causes dust.

Further, the rubber roller is used as the gear portion 5 of the nozzle 5a.
Since the phase adjustment is not performed when abutting against d, if the phase adjustment is performed at the time of starting the electronic component mounting apparatus, the phase is stored in the apparatus side after that. There is no phase shift, but during maintenance of the nozzle, etc. while the power is off,
When a person touches the nozzle, the phase of the nozzle may shift. Therefore, at the time of starting or restarting the electronic component mounting apparatus, it was necessary to manually perform phase alignment of the nozzles.

Further, since the return of the nozzle 5a to the original angular position is performed by the friction between the rubber roller and the gear portion 5d of the nozzle 5a, it is not possible to obtain a very high accuracy and the reliability is improved when the speed is increased. There was a problem of low sex.

The present invention has been made in order to solve the above points, and when returning the nozzle to the origin angular position, the accuracy can be improved without performing the phase alignment of the nozzle, and at the same time, high speed can be achieved. SUMMARY OF THE INVENTION It is an object of the present invention to provide a nozzle positioning method and mechanism for a rotary type multiple head, which is capable of improving the reliability of the method.

[0017]

According to the present invention, the above object is formed by fitting a nozzle provided in a nozzle block of a rotary type multiple head electronic component mounting device from above and forming a lower end of the nozzle. The first engaging portion engages with the first phase determining member that engages with the nozzle side engaging portion, and the second engaging portion provided at the upper end of the first phase determining member. This is achieved by a nozzle phasing mechanism that has an engaging portion that can engage and that is provided with a second phasing member that is moved up and down along the central axis.

Preferably, the second engaging portion of the first phase determining member is a protrusion formed in a trapezoidal shape so that the second engaging portion of the second phase determining member is narrowed upward. The joining portion is formed as a notch formed in a trapezoidal shape so as to widen downward correspondingly.

In the present invention, the relative phase shift is allowed when the second phase determining member is separated from the first phase determining member. When the second phase determining member engages with the first phase determining member, the relative phase shift between the first and second phase determining members is eliminated, and the phase of the nozzle block is adjusted. Depending on the nozzle phasing method
To be achieved.

[0020]

According to the above structure, when the first and second phase determining members are integrally lowered to the upper end of the nozzle, the first engaging portion of the first phase determining member is first In contact with the nozzle side engaging portion, and the engagement with the engaging portion of the nozzle causes the first phase determining member to rotate about the central axis, and in this state, the first phase determining member The member is
Stop. After that, when the first and second phase determining members are further lowered, the second phase determining member is lowered and approaches the stopped first phase determining member.

As a result, the engaging portion of the second phase determining member engages with the second engaging portion of the first phase determining member. At this time, the engaging portion of the second phase determining member is engaged with the second engaging portion of the first phase determining member. Here, if these engaging parts are displaced,
The lowering of the second phasing member causes the first phasing member to move so that the engagement portion of the first phasing member aligns with the second engagement portion of the second phasing member. It is rotated with the nozzle. As a result, the phases of the nozzles are matched.

Here, the second engaging portion of the first phase determining member is a trapezoidal projecting portion that is tapered upward, and the second engaging member of the second phase determining member is engaged. If the joint is a notch formed in a trapezoidal shape so as to widen downward correspondingly, when these engaging portions are displaced from each other, along the slope of this trapezoidal shape. hand,
By approaching each other while rotating, the engagement by the engaging portion can be smoothly performed.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to FIGS. The examples described below are preferred specific examples of the present invention, and therefore, various technically preferable limitations are given, but the scope of the present invention particularly limits the present invention in the following description. Unless otherwise stated, the present invention is not limited to these modes.

1 and 2 show an embodiment of the phase determining mechanism according to the present invention. In FIG. 1, a phase determining mechanism 10 is fitted from above onto a nozzle 11 provided in a nozzle block of a rotary multiple head electronic component mounting device, and is a first engaging portion formed along the lower end. A pin 1 as a nozzle side engaging portion formed by projecting from the side surface of the nozzle 11 with a serrated pin engaging tooth 12a.
It has the 1st phase determination member 12 (phase determination gear) which meshes with 1a.

Further, there is an engaging portion 13a which is arranged above the phase determining gear 12 and which can engage with a second second engaging portion 12b protruding at the upper end of the phase determining gear 12. Further, the cam 13 is provided as a second phase determining member that is vertically movable along the central axis and is biased upward from the phase determining gear 12 by the spring 14.

Here, the phasing cam 13 is normally separated from the phasing gear 12 by the action of the spring 14, and the engaging portion 13a has the second engaging portion 12b.
Has been released from. Therefore, a relative phase shift between the phase determining cam 13 and the phase determining gear 12, that is, a phase shift of the nozzle 11 can be allowed.

On the other hand, the phase determining cam portion 13
However, when the phase determining gear 12 is engaged against the tension of the spring 4, the engaging portions 13a and 12b are brought closer to each other. At this time, when the angular positions of the second engaging portions 12b and 13a are deviated from each other, the second engaging portions 12b and 13a slide along the inclined surface based on the trapezoidal shape,
The phasing gear 12 will engage while rotating about the central axis.

In this way, the relative phase shift between the phase determining cam portion 13 and the phase determining gear 12 is eliminated, and the phase of the nozzle block can be adjusted. It is needless to say that the spring 4 may use other biasing means having the same effect.

The positioning mechanism 10 according to this embodiment is configured as described above, and a phase determining method based on this mechanism will be described next.

In this case, in order to carry out the phase alignment of the nozzles by the phase determining mechanism 10, the nozzle block is formed as shown in FIG.
It operates as shown schematically in FIG. In FIG. 3, the rotary head is rotationally driven so as to be sequentially stopped at 14 stations arranged at equal angular intervals.

That is, from the first station to the eleventh station, as in the case of the conventional rotary head shown in FIG. 6, component supply, mounting direction selection, component thickness detection, component recognition and rotation. Correction, component mounting, defective product ejection, and selection of suction nozzles for the next component are performed. Subsequently, at the twelfth station, the phase of the nozzle is adjusted by the above-described phase setting mechanism 10 according to the present invention. Then, at the thirteenth station, the angular position of the selected nozzle is returned to the original angular position by using the original point returning mechanism 9 as shown in FIG. Finally, the selected nozzle will be checked at the fourteenth station.

The phase alignment of the nozzle described above is performed by the phase determining mechanism 10 as follows. First, when the nozzle 11 is brought to the twelfth station by rotating the rotary head, the phasing mechanism 10 standing by above the twelfth station integrally operates. It is lowered with respect to the upper end of the nozzle 11 (see FIGS. 1 and 2).

Therefore, first, the phase determining gear 1
The two pin engaging teeth 12a come into contact with the pin 11a protruding laterally from the nozzle 11, and based on the phase of the pin 11a of the nozzle 11, the phasing gear 12 rotates about the central axis. As a result, the pin engaging tooth 12a engages with the pin 11a, and in this state, the phase determining gear 12 stops.

After that, when the phase determining mechanism 10 is further lowered, the phase determining cam 13 is lowered and approaches the stopped phase determining gear 12. As a result, the engaging portion 13a of the phase determining cam 13 engages with the second engaging portion 12b of the phase determining gear 12.

At this time, the engaging portion 13a of the phase determining cam 13 is engaged with the second engaging portion 12b of the phase determining gear 12.
Is engaged with. At this time, these second engaging portions 12b,
If 13a is offset from each other, the phasing gear 12
The second engaging portion 12b of the engaging portion 1 of the phasing cam 13
As the phasing cam 13 descends, it slides along the trapezoidal slopes of the second engaging portions 12b and 13a so as to be aligned with 3a. Thus, this phasing gear 12
Is rotated together with the nozzle 11. As a result, the phase of the nozzle 11 can be matched.

Thereafter, as shown in FIG. 7, the origin return mechanism 9 first operates the swing mechanism 9g to bring the gear 9b into contact with the gear portion 11b of the nozzle 11. From this state, when the motor 9c is rotationally driven by the motor control circuit 9i, the nozzle 5a is rotated according to the rotation of the gear 9b. As a result, when the stopper pin 11c of the nozzle 11 comes into contact with the stopper 15, the rotation of the nozzle 11 is stopped, the motor 9c is stopped at the same time, and the swing mechanism 9g causes the nozzle origin return mechanism 9 to retract. To be done. Thus, the nozzle origin return is completed.

In this case, before returning to the origin of the nozzle,
Since the phase of the nozzle 11 is matched by the phase determining mechanism 10, the gear portion 11b of the nozzle 11 of the gear 9b is formed.
The teeth of the gear 9b and the gear portion 11b do not come into contact with each other and are not damaged when engaged with.

The present invention is not limited to the above embodiment. For example, the engaging portion 12a of the first phase determining member 12 need not be formed in a sawtooth shape, but another shape can be selected according to the shape of the nozzle side engaging portion. Also, the first phase determining member 1
The second second engaging portion 12b and the second engaging portion 13a of the second phase determining member 13 can be appropriately selected from those having configurations according to their shapes.

[0039]

As described above, according to the present invention, the phasing mechanism can perform the phasing of the selected nozzle by a simple operation of only lowering it. The speed can be increased easily. Also,
Since the gear can be engaged with the gear part of the nozzle to rotate the nozzle, the nozzle can be accurately rotated, and the reliability of returning to the origin is improved.
Further, since the rubber roller is not used to rotate the nozzle, the abrasion resistance is improved and the scraps due to the abrasion are not generated.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of a phase determining mechanism according to the present invention.

FIG. 2 is an exploded perspective view of the phase determining mechanism of FIG.

FIG. 3 is a diagram showing a configuration of a rotary head when the phase determining mechanism of FIG. 1 is used.

FIG. 4 is a schematic perspective view showing an example of a conventional electronic component mounting apparatus.

5 is an enlarged perspective view of a rotary nozzle unit in the apparatus of FIG.

FIG. 6 is a diagram showing a configuration of a rotary head of the rotary nozzle unit of FIG.

7 (A) is a schematic view showing an example of an origin return mechanism for performing the origin return of FIG. 5, and FIG. 7 (B) is an enlarged perspective view of a gear abutting on a gear portion of the nozzle.

[Explanation of symbols]

 10 phase determining mechanism 11 nozzle 11a pin 11b gear part 11c stopper pin 12 phase determining gear 12a pin engaging tooth 12b engaging part 13 phase determining cam 13a engaging part 14 spring 15 stopper

Claims (3)

[Claims] 1. A nozzle-side engaging portion which is fitted to a nozzle of a nozzle block of a rotary type multiple-head electronic component mounting device from above and is formed at a lower end of the nozzle. A first phase determining member that engages with the first phase determining member, and an engaging portion that can engage with a second engaging portion provided at an upper end of the first phase determining member, And a second phasing member that is moved up and down along an axis. 2. The engagement of the second phase determining member, wherein the second engaging portion of the first phase determining member is a trapezoidal protrusion that is tapered upward. The nozzle phasing mechanism according to claim 1, wherein the portion is a notch formed in a trapezoidal shape so as to widen downward correspondingly. 3. The second phase determining member according to claim 1, when the second phase determining member is separated from the first phase determining member, a relative phase shift is allowed. Nozzle characterized in that when engaged with the first phase determining member, the relative phase shift between the first and second phase determining members is eliminated and the phase of the nozzle block is adjusted. Phase determination method.