JPH118495A - Vertical drive mechanism of component-mounting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lessen vibrations and noises generated when a part handling member is driven in a vertical direction by a method, wherein two rollers are provided adjacent to each other, the one of the two rollers is brought into contact with the top face of a receiver which fits to the rollers of the part handling member, and the other roller is brought into contact with the underside of the receiver. SOLUTION: A receiver 28 with respect to the rollers 21 of a suction nozzle is provided to a protrudent piece 25a, which is located at the lateral sides of the upper part of a cam cylinder, protruding upwards in common with each suction nozzle as part-handling members, fitted to the rollers 21 arranged side by side, and formed like a U-shape so as to follow a vertical movement. The one of the rollers 21 is brought into contact with the upside 28a of the receiver 28, and the other is brought into contact with the underside 28b of the receiver 28. Through this setup, no vertical clearance is provided between the receiver 28 and the rollers 21, so that looseness is not produced, and vibrations and noises generated as a suction nozzle is moved in a vertical direction can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an up / down drive device for a component mounting machine which holds and carries a component and moves a component handling member to be mounted on an object to be mounted up and down in a timely manner for holding and mounting the component. For example, it is used for mounting an electronic component on a circuit board to manufacture an electronic circuit board.

[0002]

2. Description of the Related Art As shown in FIG. 1, this type of component mounting machine has a suction nozzle e for carrying a component c by suction and holding it and mounting it on a circuit board d. This suction nozzle e
Is held by a rotary table m connected to an index mechanism f, and is sequentially moved to a component supply unit a and a component mounting unit b by intermittent rotation by the index mechanism f and temporarily stopped, and The electronic component c supplied by the supply unit a is sucked and held and carried to the component mounting unit b, and the component mounting unit b interlocks with the IDEX mechanism f to mount the carried electronic component c on the circuit board d. The plurality of cams g move the suction nozzle e up and down in a timely manner by motion transmission via the roller h.

The roller h has a cam g as shown in FIGS.
One is provided at the distal end of a pair of levers i that follow, and is fitted into the U-shaped passive portion j of the suction nozzle e as shown in FIGS. Is transmitted to the suction nozzle e via the roller h and the passive unit j.

Thus, the suction nozzle e is connected to the component supply section a.
Can automatically and repeatedly carry the electronic component c supplied by the above and carry it to the component mounting part b and mount it on the circuit board d. When the roller h transmits the movement of the lever i to the passive part j, By rotating, it reduces friction and guarantees light, smooth and quiet operation.

However, in order that the roller h can rotate as described above, a clearance s of about 10 to 50 microns as shown in FIG. 4 is required between the roller h and the passive part j. Correspondingly, the suction nozzle e is moved downward by the spring k.
And the driven portion is driven so that the upper surface of the passive portion j is always in contact with the roller h so as to prevent rattling.

[0006]

However, when the operating speed of the component mounting machine is increased in response to the demand for higher speed in recent years, rattling due to the clearance s occurs and vibration and noise are generated. Since the accuracy also decreases, it is not possible to cope with the high accuracy required with miniaturization of electronic components and high-density mounting on a circuit board.

A main object of the present invention is to provide a vertical mounting device for a component mounting machine which can reduce vibration and noise when driving a component handling member up and down and can improve mounting accuracy even when the speed is further increased. It is in.

[0008]

In order to achieve the above object, a vertical driving device for a component mounting machine according to the first aspect of the present invention comprises:
A component handling member that is repeatedly moved between the component supply unit and the component mounting unit, holds the component supplied by the component supply unit, carries the component to the component mounting unit, and mounts the component on the mounting target. In order to hold the component at the component mounting position, the component is moved up and down in a timely manner by a motion transmission through a roller to mount the component. The two rollers are provided adjacent to each other, and a passive member in which the roller of the component handling member is fitted. The roller is characterized in that one roller is in contact with the upper surface of the portion and the other roller is in contact with the lower surface.

In such a configuration, the component handling member is sequentially moved to the component supply section and the component mounting section and temporarily stopped, and at the same time, is moved up and down in a timely manner by motion transmission via the roller. The component supplied by the component supply unit is held, and the component carried by the component mounting unit is mounted. The passive unit that receives motion transmission by the roller of the component handling member has one of the two rollers on the upper surface. In addition, since the other is in contact with the lower surface, there is no vertical clearance between the passive portion and the roller, and there is no backlash, and each of the two rollers is in contact with only one of the upper and lower surfaces of the passive portion. In addition, when transmitting motion during vertical driving, it rotates freely and prevents friction from occurring with the passive part, so that even higher speeds do not generate vibration or noise, and mounting accuracy decreases. There is no such thing as.

According to a second aspect of the present invention, in a configuration in which two rollers are provided on the same axis and the upper and lower surfaces of the passive portion of the component handling member are provided with clearances for rollers that do not come into contact with each other, the same 2 The configuration can be achieved by simply mounting one roller on one straight shaft, so that the structure is simple and a failure hardly occurs.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A typical embodiment of the present invention will be described below with reference to FIGS.

In this embodiment, as shown in FIG. 3, the main part is repeatedly moved between the component supply unit 3 and the component mounting unit 5, and the electronic component 1 supplied by the component supply unit 3 is sucked. It has a suction nozzle 15 as a component handling member to be held and carried to the component mounting unit 5 and mounted on the circuit board 2 which is a mounting target, and a component mounting unit for holding the electronic component 1 in the component supply unit 3. 5 shows an example of a component mounting machine that mounts the electronic component 1 on the circuit board 2 and manufactures the electronic circuit board by moving the suction nozzle 15 up and down in a timely manner by motion transmission via the roller 21. However, the present invention is not limited to such applications, and the present invention is applied to all cases where various components are mounted on various mounting objects. Also,
Instead of the suction nozzle 15, various component handling members corresponding to the type of component, such as a chuck type, can be employed.

A number of suction nozzles 15 are provided at equal intervals on the outer peripheral portion of the rotary table 6 which is intermittently driven to rotate by an output shaft 23a of an index mechanism 23 attached to the support frame 22 so that the sliders 24 can be moved up and down. Supported. A cam cylinder 26 is supported between the outer periphery of the output shaft 23a and each of the suction nozzles 15 supported by the rotary table 6 so as to be able to move up and down on the outer periphery of a fixed cylinder 25 fixed to the support frame 22. This cam cylinder 2
The cam followers 15a of the suction nozzles 15 are fitted into the cam grooves 27 provided on the outer circumference of the suction nozzle 6, and when the suction nozzles 15 are sequentially moved to the component supply unit 3 and the component mounting unit 5, their installation heights are reduced. The height is adjusted to the corresponding height as shown in FIG.

A passive portion 28 of the suction nozzle 15 with respect to the roller 21 is provided on an upwardly protruding piece 25a on the right and left sides of the upper portion of the cam cylinder 26, as a common part for each suction nozzle 15, and on both left and right sides. It is formed in a U-shape that can be fitted with the roller 21 and follow up and down movement of the roller 21. Each of the rollers 21 on both sides is supported by a shaft 41 at one end of a pair of left and right levers 31 of a bell crank type pivotally supported by a shaft 29 below the support frame 22, and provided at the other end of each lever 31. Each of the cams 32 is pressed against a pair of left and right cams 34 supported by a shaft 33 on the support frame 22 and is driven by the cams. The roller 21 preferably has a bearing.

The index mechanism 23 includes a rotary table 6
The suction nozzles 15 are intermittently rotated by the arrangement pitch of the suction nozzles 15 and are stopped each time when the suction nozzles 15 reach the component supply unit 3 and the component mounting unit 5. 32, the lever 31, the roller 21, the passive unit 28, and the cam cylinder 26 are moved up and down in a unified manner, and the suction nozzle 15 is moved to the component supply unit 3 and the component mounting unit 5.
The suction nozzle 15 in the component supply unit 3 sucks and holds the electronic component 1 while the suction nozzle 15 in the component mounting unit 5 sucks and holds the electronic component 1 and carries it. The mounted electronic component 1 is mounted on a predetermined position of the circuit board 2 positioned according to the mounted electronic component 1. The suction nozzle 15 is used for the component supply unit 3 and the component mounting unit 5
Is moved to the next dead center by the cam 34 via the roller 32, the lever 31, the roller 21, the passive portion 28 and the cam cylinder 26. The sucking nozzle 15 lifts the electronic component 1 held by suction and carries it to the next, and the suction nozzle 15 in the component mounting section 5 is separated from the electronic component 1 carried and mounted on the circuit board 2 by stopping suction. Heads for the next part.

However, the specific mechanism for vertically driving the component handling member via the roller is not limited to the present embodiment, and various mechanisms using a cam or not using a cam may be used. Various drive types or drive structures using actuators can be employed.

The roller 21 at one end of each lever 31 is shown in FIG.
As shown in FIG. 2, two passive units 2 are provided adjacent to each other.
8, one roller 21 contacts the upper surface 28a, and the lower surface 28b
Is a positional relationship where the other roller 21 is in contact with the other roller 21. As a result, when the suction nozzle 15 is moved up and down in a timely manner to hold and mount the electronic component 1, the passive unit 28 that receives the movement transmission by the rollers 21 is configured such that one of the two rollers 21 is on the upper surface 28 a and the other is on the upper surface 28 a. Is in contact with the lower surface 28b, and there is no vertical clearance between the passive portion 28 and the roller 21 so that there is no backlash.
1 is in contact with only one of the upper and lower surfaces 28a and 28b of the passive unit 28, and rotates freely when transmitting motion during vertical driving so that friction is not generated between the passive unit 28 and the passive unit. Vibration and noise are not generated even when the speed is increased, and the mounting accuracy is not reduced.

The spring 42 provided as shown in FIG. 1 for urging the cam cylinder 26 downward has a cushioning property and a vibration absorbing property so that the suction nozzle 15 can be moved up and down smoothly and quietly. This is not essential in the embodiment.

Further, the two rollers 21 have different supporting heights on the lever 31, and one of the rollers 21 has an upper surface 28 a of the passive portion 28.
, And the other may be in contact with the lower surface 28b of the passive unit 28, but the two rollers 2 in this embodiment
1 are provided on the same axis, and the upper surface 28a and the lower surface 28b of the passive portion 28 have a clearance 28c for the roller 21 which does not contact, so that the same two rollers 2
1 is a straight shaft 41 as shown in FIGS.
It can be configured simply by being mounted on a vehicle, and has a simple structure and is unlikely to cause a failure.

The shaft 41 is a forked part 31a at one end of the lever 31.
2 and attached in the forked part 31a.
One roller 21 is supported. For this purpose, the shaft 41 is fastened to one supporting piece of the forked portion 31a by a bolt portion 41a and a nut 43, and the head 41b is fitted to and attached to the other supporting piece, and the mounted rollers 21, 21 are attached in the axial direction. It is positioned and supported. However, the present invention is not limited to this, and the specific structure for mounting and supporting the roller 21 can be variously changed in design.

The upper and lower surfaces 28a, 28b of the passive portion 28
The escape 28c may be not limited to the undercut as in the present embodiment, but may be any form capable of avoiding contact with the roller 21. It can also be a hole.

[0022]

According to the first aspect of the present invention, there is no vertical clearance between the roller and the passive portion of the component handling member, and there is no backlash. Because it is in contact with only one side, it rotates freely when transmitting motion during vertical drive and does not generate friction with passive parts, so vibration and noise do not occur even at higher speeds, and mounting accuracy Does not decrease.

According to the second aspect of the present invention, in the configuration in which the two rollers are provided on the same axis and the upper surface and the lower surface of the passive portion of the component handling member are provided with clearances for the rollers that do not contact, The configuration can be achieved by simply mounting one roller on one straight shaft, so that the structure is simple and a failure hardly occurs.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a vertical drive mechanism of a component mounting machine according to a representative embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a motion transmitting unit via a roller of the vertical drive mechanism of FIG.

FIG. 3 is a sectional view of a main part of the component mounting machine having the vertical drive mechanism of FIG.

FIG. 4 is a sectional view showing a main part of a conventional component mounting machine.

5 is a perspective view of a main part of a vertical drive mechanism of the apparatus shown in FIG.

FIG. 6 is a cross-sectional view showing a motion transmission unit via a roller of the vertical movement drive mechanism of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic component 2 Circuit board 3 Component supply part 5 Component mounting part 15 Suction nozzle 21 Roller 23 Index mechanism 24 Slider 25 Fixed cylinder 26 Cam cylinder 27 Cam groove 28 Passive part 28a Upper surface 28b Lower surface 28c Escape 31 Lever 34 Cam

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor: Attack Yamazaki, 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] 1. A component handling member that is repeatedly moved between a component supply unit and a component mounting unit, holds a component supplied by the component supply unit, carries the component to the component mounting unit, and mounts the component on a mounting target. In a vertical driving device of a component mounting machine, which moves up and down by a motion transmission via a roller for component mounting at a component mounting position for holding a component in a supply unit, two rollers are provided adjacent to each other. , One roller is in contact with the upper surface of the passive part where the roller of the component handling member fits,
An up / down drive device for a component mounting machine, wherein the lower roller is in contact with the other roller. 2. The two rollers are provided on the same axis,
The vertical drive device for a component mounting machine according to claim 1, wherein the upper surface and the lower surface of the passive portion of the component handling member are provided with a clearance for a roller that does not contact.