JPS61166429A - Ultrasonic conveyer - Google Patents

Abstract

PURPOSE:To provide a conveyer which can eliminate a need of mechanical structure portion and prevent generation of noise and trouble due to its structure by exciting progressive wave by ultrasonic vibration on the surface of an elastic body, and bringing a body into contact with the progressive wave on the elastic body surface. CONSTITUTION:Ultrasonic vibrators 2 are installed on the inner surface or the lower outer surface of a conveyer main body 1 comprising a belt-like elastic body formed like an endless oval, for example, at spaces half the vibration wavelength. In this arrangement, when the vibrators 2 are driven to apply vibration to the conveyer main body 1 in direction of bending, elastic wave due to bending vibration is generated, so that by the ratio of the longitudinal displacement to the transversal displacement in a certain material point on the surface of the main body 1, the material point is caused to make elliptic motion and progress. Accordingly, a body is brought into contact with the material point to be conveyed through frictional force.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a conveyor that utilizes ultrasonic vibrations as power for conveying objects.6 [Problems to be Solved by the Invention] Conventional conveyors use a belt Because the structure is such that a conveyor such as a conveyor or screw is run or rotated by the output of a drive source such as a motor to convey objects supported by the conveyor or screw, the structure is complex2.Mechanical efficiency is poor1.
There are many problems caused by its structure, such as loud operating noise.

Conveyors that utilize mechanical vibrations or electromagnetic vibrations caused by the rotation of a vibrating body are also known, but they have the same problems as the above example in terms of structure, operational noise, etc.

[Means for Solving the Problems] The present invention has been made for the purpose of providing a conveyor that does not have the problems of conventional mechanically structured conveyors. The conveyor body is formed in an annular shape, and an ultrasonic transducer is attached to the inner surface or lower outer surface of the conveyor body, and a surface traveling wave propagating in the length direction of the conveyor body is formed on the upper surface of the conveyor body. It is characterized in that it is designed to excite.

[Function] Elliptical motion, which is a combination of longitudinal waves and transverse waves with a 90 degree phase shift observed at a mass point on the surface of an elastic body, moves along the surface of the elastic body, resulting in a surface traveling wave. When an object with mass comes into contact with the object, the object is transported in the opposite direction to the direction of the traveling wave.

[Example] Fig. 1 is a perspective view of an example of the conveyor of the present invention, in which (1) shows a conveyor main body in which a band-shaped elastic body is formed into an endless annular shape;
2) is attached to the lower outer surface of the main body (1), for example, with a vibration wavelength of 1.
These are two ultrasonic transducers mounted with a separation of /2.

The length of the outer surface of the conveyor body (1) is matched based on the length of one wavelength of vibration.

When the vibrator (2) is driven and the conveyor body (1) is vibrated in the bending direction, an elastic wave is generated by this bending vibration, and the vertical vibration at the mass point on the surface of the conveyor body (1) is generated. Depending on the ratio of the directional displacement and the lateral displacement, the mass point moves in an elliptical motion (see Fig. 2). Therefore, when an object comes into contact with this mass point, it is transported through frictional force.

In order to make the traveling waves in one direction, the driving voltages applied to the two vibrators are given a phase shift of, for example, 90° or 120°, and in order to eliminate reflected waves at the free end boundary, the conveyor body is an endless curved surface with matching lengths.

Moreover, a plurality of conveyor bodies (1) can be arranged in parallel to form a wide conveyor body.

FIG. 3 is a perspective view of an example of the conveyor of the present invention formed inside a pipe. In the figure, reference numeral 11 denotes a pipe serving as a cargo support, and its material may be metal, synthetic resin, or other materials such as glass. Reference numeral 12 denotes a rod-shaped elastic body that is tightly fitted into a cutout in the bottom of the pipe 1, and corresponds to the conveyor body (1) in the above example. The elastic body 12 may be made of any material as long as it can transmit ultrasonic vibrations, but it is preferably made of a material with low vibration transmission loss, such as duralumin. 12a is a backing material fitted to the fitting part, and its purpose here is watertight.

The elastic body 12 has a side facing the inner surface of the pipe 11 formed into a curved surface along the inner surface of the pipe, so that it is integrated with the shape of the inner surface of the pipe.

Reference numeral 31.41 denotes an ultrasonic vibrator attached to the outer surface of the pipe in the elastic body 2. Here, two Lascijuvin type vertical vibrators 31a, 41a are connected to a horn-shaped transformer 32.
a and 42a, respectively, and are attached to the elastic body 12. Therefore, one of the vibrators 31. If one is driven and the other is used for wave reception, the traveling wave will travel to the right in the figure, and if the relationship between driving and reception is reversed, the traveling wave will travel in the opposite direction. In the figure, 33a and 43a are an oscillation circuit and a wave receiving circuit.

Note that the configuration of the vibrator may be as follows. That is, the fourth
As shown in the figure, for example, nine electrodes 52 are placed on the surface of a flat piezoelectric element 51 that is approximately one turn smaller than the elastic body 12.
are arranged in series, these are divided into three circuits, and a phase shift of 120 degrees is applied to the high frequency power source 5.1 through the phase shifter 53, so that the voltage of the power source 54 is applied to each set of electrodes. ,
In the example shown in the figure, it acts to cause the traveling wave to proceed to the right. When the traveling wave is made to travel backwards, the phase shift in the phase shifter 53 may be reversed.

When the conveyor is constructed in this way, when the object F comes into contact with the elastic body 12, the object F is moved to the pipe 1 in the opposite direction to the traveling direction of the traveling wave through the frictional force between the load F and the elastic body 12. The vehicle will be transported inside. Note that the object F includes lumps, powder and granules, fluid objects (including liquids), and the like.

In the above embodiments, the cargo support may be a simple plate-shaped body or a gutter-shaped body.

Furthermore, the manner in which the elastic body 12 to which the vibrator is attached can be attached to the luggage support body can be as follows.

When the cargo support (pipe 1 in the above example) is long, the elastic bodies are attached in a row. Also.

When the support body is a gutter-like body or a tubular body, the elastic bodies (2) may be provided in rows on the vertical wall surface or ceiling wall surface of the support body.

In this way, the number of traveling waves that come into contact with the cargo increases, thereby increasing the conveyance effect.

Furthermore, in order to make the conveyance condition uniform, the above-mentioned elastic bodies may be arranged in a protrusion-like manner for a gutter-like body, and may be arranged in a spiral manner for a tubular body. .

[Effects of the Invention] The present invention is as described above, and includes exciting a traveling wave caused by ultrasonic vibration on the surface of an elastic body, and moving the elastic body itself so that an object comes into contact with the traveling wave on the surface of the elastic body. The conveyor body is formed into an endless elliptical conveyor body, or the conveyor is formed by attaching an elastic body in the shape of a flat plate or an endless ellipse to a baggage support body in the form of a plate, gutter, or tube. There is a similar effect.

Since the components do not move like in conventional mechanical conveyors, they do not make noise when moving. Also,
Since the conveyor body and the load support itself do not move, no mechanical structure is required for this purpose.
Also, there are no failures due to its structure.

Furthermore, it has the advantage that the operating noise is close to that of conventional mechanical vibration and electromagnetic vibration type conveyors.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of the conveyor of the present invention, FIG. 2 is a diagram of the principle of operation, FIG. 3 is a front sectional view of another example, and FIG. 4 is a perspective view showing another example of the vibrator. 11... Pipe, 12... Elastic body, 13.14...
・Ultrasonic transducer, F...object

Claims (1)

[Claims] A belt-shaped elastic body is formed into an endless annular conveyor body, and an ultrasonic vibrator is attached to the inner surface or lower outer surface of the conveyor body, and an ultrasonic vibrator is attached to the upper surface of the conveyor body in the length direction of the conveyor body. An ultrasonic conveyor characterized by exciting surface traveling waves propagating in the opposite direction.