JPS60144224A - Ultrasonic parts feeder - Google Patents

Abstract

PURPOSE:To obtain a quiet parts feeder not generating noises by providing a ultrasonic vibrator and a parts conveying member slightly vibrated elliptically by it. CONSTITUTION:In a parts feeder of a linear type, for example, a vibration generating section is constituted with a bolt-tightened Langevin transducer 11 of 30kHz and a sliding mode transducer 12 in combination, for example. These transducers 11, 12 are installed on a base 14 and are tightened with a bolt 15 and nut 16. In addition, the slant tooth 12' of the sliding transducer 12 is tightened hard with a conveyor plate 13 bitten. When a high-frequency power of 30kHz is applied across lead wires 17, 18, the transducer 11 is slightly vibrated and also the conveyor plate 13 is slightly vibrated, thereby parts 19 on the conveyor plate 13 are elliptically moved and advanced in the elliptical rotation direction.

Description

[Detailed Description of the Invention] [Technical Separation/Object of the Invention] The present invention relates to an improvement of a parts feeder, and an object of the present invention is to provide a quiet parts feeder that does not produce noise.

[Background technology]

Conventional parts feeders are used in place of belt conveyors or in combination with belt conveyors as parts feeding devices in product assembly plants. The parts feeder includes a type that applies vibration to parts and conveys them linearly on a conveyor, and a type that conveys parts linearly on a conveyor, and a type that conveys parts along a spiral corridor while outside the ball K.
There is a type that sends fjIi. Both of these utilize commercial frequency vibrations, and when a current is supplied from a commercial power source, the electromagnetic force of the coil generates mechanical vertical vibration of the blade or 60Hz, and it also creates a tilted column-like structure. The principle of feeding is to apply elliptical vibration to the parts by changing the sliding or torsional vibration lever using a leaf spring. K, which uses commercial frequency vibration to move parts at a speed of 100 m/s, requires vibrations with two strokes of amplitude, and its biggest drawback is that it generates a tremendous amount of contact.

[Summary of xA Ming]

This invention solves the above-mentioned drawbacks of the prior art.
The objective is achieved by a parts feeder that is equipped with an ultrasonic vibrator, such as a piezoelectric material, and a parts conveyor, such as a conveyor, which vibrates minutely in an elliptical shape using the ultrasonic transducer. This is what I did. Examples of the uninvented features will be explained below with reference to the drawings.

〔Example〕

Embodiment 1 FIG. 1 shows an embodiment of a linear parts feeder of the present invention, and FIG. 2 shows an embodiment of a bowl-shaped parts feeder. In FIG. 1, 1 is an ultrasonic generator, 2 is a conveyor, 3 is a part, and 4 and 5 are lead wires. Further, in FIG. 2, 6 is a ball, 7 is an ultrasonic generating section, 8 is a spiral corridor, 8' is a parts ejecting section, and 9 and 10 are lead wires. Both have the same external appearance as conventional parts feeders.

The difference is that the feeder conveyor does not vibrate appreciably, so the parts move in an orderly manner, silently. It eliminates factory noise caused by parts feeders, and also eliminates parts supply congestion. The main reason why such an ideal parts feeder was realized was that ultrasonic vibration was introduced into the driving force for driving the parts, and the principle of its construction will be explained below based on an example.

As shown in FIGS. 3 and 4, the configuration of the linear parts feeder is a combination of a 313 KHz bolted Langevin oscillator 11 and a sliding mode oscillator 12, which are installed on the pace 14 and connected to a hook pole. )
15 and tightened with a nut 16. The inclined teeth 12' of the sliding vibrator 12 are strongly tightened while biting the conveyor plate 13.

High frequency of K 3tJ KHz between lead wires 17 and 18 (
When a force is applied and the vibrator 11 moves slightly up and down with an amplitude of several microns, the conveyor vibrates not only up and down but also back and forth with an amplitude of several microns, causing the parts 19 on the conveyor to move in the vertical plane. It is caused to move in an ellipse with an amplitude of 30,000 microns per second, and about 10 V in the direction of rotation of the ellipse.
It can be pushed forward at the speed of S.

Embodiment 2 FIG. 5 shows an embodiment of a ball-type parts feeder. What is shown is an excitation mechanism that excites ball A, which is a spiral mode oscillator composed of a combination of bolted Langevin oscillator 21 and torsion mode oscillator O. When high-frequency power is applied, a torsional vibration with an amplitude of several microns is generated, and the parts inside the ball undergo a clockwise rotational torque and a force that pushes them up in the direction of one rotation, causing them to spiral in an elliptical motion with a diameter of several microns. It is pushed through the corridor 8 (see Figure 2) and finally delivered through the parts supply section. Note that the symbol in the figure is the ball receiver. Here, the sliding mode oscillator of Example 1 and the spiral mode oscillator of Example 2 have already been filed in patent application No. 58-148.
671 and Japanese Patent Application No. 58-165099, the details are omitted here.

As explained above, since the present invention has a configuration that uses ultrasonic vibration, even when using ultrasonic vibration of, for example, 15 kilohertz, the vibration is the lowest compared to the vibration at the operating frequency of the conventional feeder. It is about 300 times as large, and the amplitude Its is less than 1/300, that is, several micrometers, so vibration noise is unlikely to be generated when parts are transported, but even if it were, it would be an ultrasonic wave and would not be audible to human ears. Therefore, it can function as a quiet parts feeder without noise.

In the above embodiment, an ultrasonic transducer using a piezoelectric material was used as an example, but any ultrasonic vibration may be used. Needless to say, it is effective.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the linear parts feeder according to the present invention, FIG. 2 is an explanatory diagram of the configuration of the ultrasonic excitation section according to the present invention, and FIG. FIG. 3 is an explanatory diagram of a snowy-air vibration excitation section. 1.7...Ultrasonic generator, 2...Conveyor, 8...Spiral corridor, 11, 21.
......Language transducer, 12...Up mode transducer, 13...Conveyor plate, 22...
...Torsional vibrator, 26...Ball. Sai 1 Cause / l 2 r Sai 3z Figure 74

Claims (1)

[Claims] A parts feeder comprising an ultrasonic vibrator and a parts conveying member that vibrates slightly in an elliptical shape by the ultrasonic vibrator.