JPH0441755Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an ultrasonic linear motor that applies ultrasonic waves to a flexible core material to move a spring material provided around the flexible core material.

(Prior Art) Many reports have recently been made regarding the transportation of objects using ultrasonic waves. FIG. 2 shows a schematic configuration of a conventional ultrasonic linear motor. In this figure, a feed table 1 made of brass or the like is a sound wave propagating body for transferring a movable object 2 placed thereon, and a Languevent type piezoelectric vibrator is attached to one end of the feed table 1. An excitation vibrator 3 made up of a vibrator, etc. is mechanically (acoustically) connected to the other end of the vibrator 3, and a load vibrator 4 made of a Languevent type vibrator or the like is also connected to the other end. Then, the vibration vibrator 3
is excited by the excitation power source 5 for excitation, thereby generating ultrasonic vibrations in the feed table 1, which is a sound wave propagating body. In addition, a load resistor 6 is connected to the load vibrator 4, and this absorbs the reflected part of the ultrasonic energy sent out from the vibrator 4.
Only the traveling wave component of the ultrasonic waves is allowed to exist inside. As a result, the object 2, which is a movable body, is transported in the direction of arrow A by the traveling wave component of the feed table 1, which acts as a sound wave propagator.

(Problem to be solved by the invention) By the way, in the configuration of the conventional ultrasonic linear motor as shown in Fig. 2, the feed table 1 that transmits ultrasonic vibration is made of a hard material and is flexible (flexible property).
Therefore, it is difficult to apply the method to applications other than transporting a movable object 2 linearly, for example, transporting it along a path of arbitrary curvature.

(Means for solving the problem) In view of the above points, the present invention uses a flexible core material made of bundled wire rods as a sound wave propagation body, and a spring material can be freely moved around this flexible core material. The present invention aims to provide an ultrasonic linear motor that can move a spring member, which is a movable body, along a path bent at an arbitrary curvature.

The ultrasonic linear motor of the present invention connects one end of a flexible core material made of a plurality of wire rods to an ultrasonic vibration source, and freely moves a spring material spirally wound around the flexible core material. By creating a structure that provides
The above problems have been resolved.

(Function) In the ultrasonic linear motor of the present invention, an acoustic wave propagating body is composed of a flexible core material in which multiple wires are bundled together,
A movable spring material is wound spirally around this core material, so that the interaction between the core material and the spring material allows the spring material to be efficiently moved by ultrasonic vibrations even in a bent state of any curvature.

(Example) Hereinafter, an example of the ultrasonic linear motor according to the present invention will be described with reference to the drawings.

As shown in Figure 1, the ultrasonic linear motor is
Diameter 0.08 as a sound wave propagator that transmits ultrasonic vibrations
A flexible core material 11 is constructed by bundling a plurality of stainless steel wires of 0.5 mm to 0.5 mm, and a spring material 12 is movably wound around the flexible core material 11 to be used as a movable body. and the flexible core material 1
One end of 1 is a piezoelectric vibrator 13 as an ultrasonic vibration source.
connected to. For example, the piezoelectric vibrator 13 constitutes a Languevan type piezoelectric vibrator in which two piezoelectric elements 16 are arranged between an amplitude amplifying horn 14 and a back block 15, and are tightened together with bolts 17. The core material 11 is connected and fixed to the tip end surface of the horn 14. Note that the spring material 12 as the transported member may include the transported object 10 as needed.
is installed.

In the above configuration, if the piezoelectric vibrator 13 is connected to a high frequency power source and ultrasonic vibration is generated therein,
The ultrasonic vibrations are amplified by the horn 14 and further transmitted to the flexible core material 11 as a sound wave propagating body. Since the helical spring material 12 and the flexible core material 11, which are movable bodies, come into contact with each other at least at a plurality of locations, they work to mutually compensate for the attenuation of ultrasonic vibrations even in the bent state, and the spring material 12 picks up the traveling wave component of the ultrasonic vibration and moves in the direction of arrow B. At this time, if the object 10 to be transferred is attached to the spring material 12, this also moves in the same way.

In addition, although the piezoelectric vibrator was illustrated as an ultrasonic vibration source in the above embodiment, a magnetostrictive vibrator may be used instead.

Further, the tip of the flexible core material 11 as a conveying member absorbs the reflected portion of the ultrasonic energy sent out from the excitation vibrator, so that only the traveling wave component of the ultrasonic waves exists in the core material 11. A load vibrator and a load resistor may be further provided.

(Effects of the invention) As explained above, the ultrasonic linear motor of the invention uses a flexible core made of a plurality of wire rods as a sound wave propagation body, and a spiral shape as a movable body around the flexible core. Since the spring material is movably wound around the body, it has the great advantage of being able to move the spring material along a path bent at an arbitrary curvature.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view showing an embodiment of an ultrasonic linear motor according to the present invention, and FIG. 2 is a front view showing a conventional ultrasonic linear motor. 11... Core material, 12... Spring, 13... Piezoelectric vibrator.

Claims (1)

[Claims for Utility Model Registration] (1) A spring material 12 spirally wound around the flexible core material 11 with one end of the flexible core material 11 made of a plurality of wires bundled together connected to an ultrasonic vibration source. An ultrasonic linear motor characterized by being freely movable. (2) The ultrasonic linear motor according to claim 1, wherein the flexible core material 11 is a bundle of stainless steel wires having a diameter of 0.08 to 0.5 mm.