JPH0725437A - Directly advancing parts feeder - Google Patents

Abstract

PURPOSE:To provide a directly advancing parts feeder by which increase of a parts conveying speed, compactification, and noise reduction can be achieved. CONSTITUTION:A directly advancing parts feeder is provided with a linear type ultrasonic motor 1b, a trough 3 fixed in a movable body 55 of the linear type ultrasonic motor 1b, and an ultrasonic motor driving means, which directly and reciprocatively oscillates the movable body 55 and regulates it so that it advances slowly while retracts rapidly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straight part feeder for vibrating and feeding parts and the like.

[0002]

2. Description of the Related Art Generally, a straight-moving parts feeder is one that transmits the vibration of an oscillating element such as an electromagnet to a trough via a leaf spring to vibrate and feed the parts on the trough.

[0003]

However, in the straight-moving parts feeder as described above, there is a limit to the spring characteristics of the leaf spring, and there is a limit to speeding up the process. There was a limit to noise reduction.

In view of the above, it is an object of the present invention to provide a straight-moving parts feeder capable of speeding up parts transportation, downsizing, and noise reduction.

[0005]

In order to achieve the above object, a straight parts feeder of the present invention comprises a rotary type ultrasonic motor, a trough, and a swing arm fixed to a rotor of the rotary type ultrasonic motor. , An ultrasonic motor driving means for oscillating and rotating the rotor of the ultrasonic motor in forward and reverse directions, slowing the forward rotation and adjusting the reverse rotation fast, and swinging the free end of the swing arm in the trough. And a conversion means for converting to straight forward and backward vibrations.

Further, in order to achieve the above object, the straight-moving parts feeder of the present invention vibrates the movable body in a rectilinear reciprocating manner, the linear type ultrasonic motor, the trough fixed to the movable body of the linear type ultrasonic motor. Along with this, ultrasonic motor driving means for adjusting the speed in the traveling direction to be slow and the speed in the backward direction to be fast are provided.

[0007]

According to the present invention, forward / reverse oscillating rotation of the rotor of the rotary type ultrasonic motor is transmitted to the trough via the swing arm and the converting means, or the movable body of the linear type ultrasonic motor is moved straight. The reciprocating vibration is directly transmitted to the trough, and in any case, the reciprocating vibration is generated in the trough. Then, since the rectilinear reciprocating vibration applied to the trough has a low speed in the advancing direction and a high speed in the retreating direction, a conveying force in the advancing direction is applied to the parts on the trough, and the parts are vibrated and fed on the trough.

Since the straight-moving parts feeder of the present invention is constructed by using the rotary type or linear type ultrasonic motor, the leaf springs required in the conventional example can be eliminated. Therefore, by speeding up the vibration of the ultrasonic motor, it is possible to speed up the parts transportation, and since the leaf spring is not necessary and the ultrasonic motor itself can be downsized, the apparatus can be made compact. Can be planned. Further, since the noise generated by the leaf spring does not occur, it is possible to reduce the noise.

[0009]

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

1 and 2, reference numeral 1a is a rotary type ultrasonic motor fixed on a base 2, and 3 is an ultrasonic motor 1 via a swing arm 4 and a conversion means 25.
It is a trough connected to the rotor 5 of a.

A rotary type ultrasonic motor 1 is fixed to a base 2 so that its rotary shaft is horizontal, and an outer case 6, a stator 7 fixed to a substrate portion of the outer case 6, and an outer case 6. Is mainly composed of a rotor 5 rotatably supported by a cross roller bearing 8.

The stator 7 is attached to the outer case 6 by screws 9.
And an annular elastic body 7a and a piezoelectric body 7b. The rotor 5 includes a rotary plate 5a rotatably supported by the cross roller bearing 8, a movable ring 5b fixed to the rotary plate 5a so as not to rotate relative to the rotary plate 5a, and the movable ring 5b pressed against the elastic body 7a. The disc spring 5c is provided. Reference numeral 10 is a bolt for fixing the ultrasonic motor 1a to the standing support plate 2a of the base 2. 2b is a substrate of the base 2.

As is well known, the principle of operation of the rotary type ultrasonic motor 1a is that a high frequency voltage is applied to the piezoelectric body 7b to elastically deform the elastic body 7a, and the surface of the elastic body 7a is indicated by P in FIG. By generating a traveling wave in the direction, the rotor 5 that is brought into pressure contact with the surface of the elastic body 7a is rotated in the direction indicated by Q in FIG. By reversing the sign of the voltage applied to the piezoelectric body 7b, the direction of the traveling wave can be reversed and the rotor 5 can be rotated in the reverse direction.

A bolt 31 is attached to the rotary plate 5a of the rotor 5.
The oscillating arm 4 is fixedly attached at its base portion by means of, and the rotor 5 of the rotary type ultrasonic motor 1a and the oscillating arm 4 are integrally oscillated.

The swing of the free end of the swing arm 4 is converted by the conversion means 2.
5, the trough 3 is converted into rectilinear reciprocating vibration. The trough 3 is supported by a guide rail 26 fixed to the upper end of the standing support plate 2a so as to be capable of rectilinear reciprocation. Reference numeral 27 denotes a guide body attached to the bottom surface of the trough 3 and fitted into the guide rail 26.

A pinned bolt 28 is fixed to the free end of the swing arm 4, and a follower 29 having a guide groove 29a for engaging with the pin 28a of the pinned bolt 28 is fixed to the bottom surface of the trough 3. ing. Bolt with pin 2
The converting means 25 is constituted by 8 and the follower 29, whereby the trough 3 vibrates in a straight line in a horizontal direction as the swing arm 4 swings.

In order to control the amplitude of rectilinear reciprocating vibration of the trough 3, as shown in FIG. 2, a pair of front and rear light shielding plates 12a and 12b are attached to the bottom surface of the trough 3, and the base 2 is provided.
1 so as to project upward at both front and rear ends of the upright support plate 2a.
A pair of photo interrupters 13a and 13b are attached.

The rotary type ultrasonic motor 1a is controlled by the driving means D so that the rotor 5 vibrates and rotates in forward and reverse directions, the forward rotation is slow, and the reverse rotation is fast. . An example of the ultrasonic motor driving means D that enables this is shown in FIG.

In FIG. 3, 11 is a drive circuit, 12a,
Reference numeral 12b is the light shielding plate, 13a and 13b are the photo interrupters, 14 is an RS flip-flop, and 15a and 15
Reference numeral b is a switch, and 16a and 16b are variable resistors.

The oscillating rotation of the rotor 5 in the forward and reverse directions is determined by the above-mentioned 1
The pair of photo interrupters 13a and 13b and the pair of light shielding plates 12a and 12b are configured to determine the amplitude thereof. Specifically, when one photo interrupter 13a detects one light shielding plate 12a, RS
A positive rotation signal CW is output from the flip-flop 14,
When one switch 15a is turned on to rotate the rotor 5 forward and the other photo interrupter 13b detects the other light shielding plate 12b, the RS flip-flop 14
The reverse rotation signal CCW is output instead of the forward rotation signal CW, and the other switch 15b is turned on to rotate the rotor 5 in the reverse direction.

The rotation speeds in the forward and reverse directions can be determined by setting the resistance values of the variable resistors 15a and 15b, respectively. In the present invention, the rotation in the forward direction is slow and the rotation in the reverse direction is fast. .

Thus, by operating the ultrasonic motor driving means D configured as described above, a traveling wave vibrating in the forward and reverse directions is generated in the elastic body 7a of the stator 7 based on the principle shown in FIG. The rotor 5 pressed against the elastic body 7a by the spring 5c vibrates and rotates in the direction opposite to the direction of the traveling wave. This oscillating rotation causes the oscillating arm 4 to oscillate, and the oscillating arm 4 is oscillated by the converting means 25.
Is converted to straight forward and backward vibration.

In the present embodiment, the photo interrupter 13 is arranged so that the amplitude of the rectilinear reciprocating vibration of the trough 3 becomes 10 mm.
The mounting positions of a and 13b and the light shielding plates 12a and 12b are set. And the forward direction of the trough 3 (work transfer direction)
The movement time is set to 146 ms and the backward movement time is set to 54 ms so that the forward speed is approximately 1/3 of the backward speed.

With the above construction, the work on the trough 3 is conveyed in the direction shown by S in FIG.

Next, a second embodiment of the present invention will be described with reference to FIGS.

In this embodiment, a linear type ultrasonic motor 1b is used, and the trough 3 is fixed to the movable body 55 of the ultrasonic motor 1b. The movable body 55 is moved straight by the ultrasonic motor driving means. While reciprocally oscillating, adjust the speed in the advancing direction to be slow and adjust the speed in the backward direction to be fast,
The components on the trough 3 are configured to be conveyed in the same direction as the traveling direction.

The principle of operation of the linear type ultrasonic motor 1b is the same as that of the rotary type ultrasonic motor 1b.
A high-frequency voltage is applied to the elastic body 57a to elastically deform the linear elastic body 57a to generate a traveling wave on the surface of the elastic body 57a in the direction indicated by p in FIG. The movable body 55 thus moved is moved straight in the direction indicated by q in FIG. By reversing the positive and negative of the voltage applied to the piezoelectric body 57b, the direction of the traveling wave can be reversed and the movable body 55 can be moved straight in the opposite direction.

In FIG. 5, reference numeral 52 is a base, 57 is a stator composed of an elastic body 57a and a piezoelectric body 57b, 55 is a rectilinear moving plate 55a, a movable plate 55b, and the movable plate 55b is pressed against the elastic body 57a. It is a movable body including a spring plate 55c. The movable body 55 is guided by the cross roller bearing 58 so as to be able to move linearly freely.
Supported by.

The trough 3 is directly attached to the movable body 55 using bolts 60.

The drive means for driving the linear type ultrasonic motor 1b is basically the same as that shown in FIG.
A pair of light shielding plates 12a and 12b and a photo interrupter 1
The rectilinear reciprocating vibration of the movable body 55 is controlled by utilizing 3a and 13b.

The present invention can be constructed in various modes other than those shown in the above embodiments. For example, in the second embodiment, the trough 3 is directly fixed to the linearly movable body 55,
The trough 3 can be fixed to the movable body 55 via the intermediate coupling body. Further, in the first and second embodiments, the rotation of the rotor 5 and the forward / backward switching of the linear movement of the movable body 55 are switched between the photo interrupters 13a and 13b and the light shielding plates 12a and 12b.
However, it is also possible to do this using a timer.

[0032]

As described above, according to the present invention, it is possible to provide a straight parts feeder capable of speeding up parts transportation, downsizing, and reducing noise.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a first embodiment of the present invention.

FIG. 2 is a plan view thereof.

FIG. 3 is a block diagram showing ultrasonic motor driving means.

FIG. 4 is a perspective view showing the operating principle of a rotary type ultrasonic motor.

FIG. 5 is a cross-sectional front view of the second embodiment of the present invention.

FIG. 6 is a perspective view showing the operating principle of a linear type ultrasonic motor.

[Explanation of symbols]

 1a Rotary type ultrasonic motor 1b Linear type ultrasonic motor 3 Trough 4 Swing arm 5 Rotor 25 Converting means 55 Movable body D Ultrasonic motor driving means

Claims (2)

[Claims] 1. A rotary type ultrasonic motor, a trough, an oscillating arm fixed to the rotor of the rotary type ultrasonic motor, and a rotor of the ultrasonic motor vibrating and rotating in forward and reverse directions, and A straight drive characterized by comprising ultrasonic motor driving means for slowing the rotation and adjusting rotation in the reverse direction fast, and conversion means for converting the swing of the free end of the swing arm into the straight forward / backward vibration of the trough. Parts feeder. 2. A linear type ultrasonic motor, a trough fixed to a movable body of the linear type ultrasonic motor, and a linear reciprocating vibration of the movable body, a slow speed in a traveling direction and a speed in a backward direction. A straight-advance parts feeder, which is equipped with an ultrasonic motor driving means for quick adjustment.