JP3836962B2 - Vibrating sieve with ultrasonic oscillator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration sieve machine with an ultrasonic oscillator that has an increased sieving ability by adding an ultrasonic oscillator.
[0002]
[Prior art]
As is well known, a circular vibrating screen supports a cylindrical vibrating container with a bottom by a plurality of coil springs on a base, and a vibration motor is fixed at the center of the lower part of the vibrating container. It is made by stretching a screen such as a wire mesh inside, and has been widely used for sieving, mixing and crushing foods, medicines and various industrial materials. In addition, a resonance ring is provided on the lower surface of the sieve screen of this vibration sieve machine, and micro vibration waves are propagated from the ultrasonic oscillator to the resonance ring, so that the sieving ability is improved. A vibration sieving machine with an ultrasonic oscillator that can be effectively screened has also been known.
[0003]
In the conventional vibration sieve machine with an ultrasonic oscillator, as shown in FIG. 5, a plurality of stays c are integrally fixed by welding inside a frame body b on which a sieve net a is stretched, Further, the resonance ring d is fixed to the tip of the stay c by welding, the resonance ring d is brought into contact with the lower surface of the sieve mesh a, and the ultrasonic oscillator e is attached to the resonance ring d.
[0004]
[Problems to be solved by the invention]
By the way, in such a conventional resonant ring, since the micro vibration wave propagates to the base of the stay c and the welded portion at the tip and constantly vibrates, there is a drawback that the material of the welded portion tends to fatigue and break. there were.
[0005]
[Means for Solving the Problems]
The present invention is intended to solve the above-mentioned problem. A support frame is fixed to a lower side of a frame body on which a sieve net is stretched, and a resonance ring is horizontally disposed on the support frame via a plurality of springs. And an ultrasonic oscillator is fixed to the resonance ring, and the resonance ring is brought into contact with the lower surface of the sieve net by the elasticity of the spring.
[0006]
Embodiment
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an entire vibratory sieve equipped with an ultrasonic oscillator according to the present invention. Reference numeral 1 denotes a base, and 2 denotes a bottomed cylindrical vibrating container supported by a coil spring 3 on the base. 4 is a vibration motor fixed to the lower part of the vibration container 2, 5 and 6 are non-equilibrium weights attached to the motor shaft, and 7 is a discharge cylinder for a sieve provided on one side of the vibration container. It is.
[0007]
Reference numeral 8 denotes a frame body in which a sieve net 9 such as a wire mesh set in the vibrating container 2 is stretched, and reference numeral 10 denotes a metal band that detachably holds the frame body. As shown in FIG. 2, 12 is an annular support frame fixed to the lower portion of the frame body 8, and the support frame 12 has a frame at the tip of the mounting extension 13 projecting radially on the outer periphery thereof. The stay 16 fixed to the mounting piece 14 on the lower surface of the body 8 with the screw 15 is fixed to the lower end of the stay 16 with the screw 17. A plurality of springs 18 are fixed on the support frame 12 at regular intervals, and the resonance ring 20 is horizontally supported on the springs 18.
[0008]
The spring 18 is formed by bending a linear spring material having a diameter of 2 to 3 mm in a meandering manner. As shown in FIG. 3 and FIG. The ends of the springs 18 are respectively crimped to the support frame 12 and the resonance ring 20, and the fasteners 21 are fixed with screws 22. In addition, it is desirable that the spring 18 is fixed without using welding as described above in view of improving the mechanical strength against slight vibration.
[0009]
The ultrasonic oscillator 23 is fixed to a part of the resonance ring 20, and the resonance ring 20 is brought into contact with the lower surface of the sieve net 9 by the elasticity of the springs 18. For this reason, the ultrasonic oscillator 23 oscillates an ultrasonic wave by receiving a high frequency current of 20 kHz to 40 kHz from a generator (not shown) through the cable 24, and the micro vibration wave passes through the resonance ring 20 to the sieve network 9. Propagated and slightly shaken. Note that the contact between the resonance ring 20 and the sieve net 9 may be appropriately separated by using an adhesive as necessary so as not to be separated.
[0010]
In the vibration sieve machine configured as described above, the vibration container 2 is vibrated as a whole by the operation of the vibration motor 4, and at the same time, the sieve mesh 9 is slightly vibrated via the resonance ring 20 by the operation of the ultrasonic oscillator 23. The powder or the like loaded on 9 is sieved and discharged to the discharge cylinder 7.
[0011]
Since the resonance ring 20 is supported on the support frame 12 via the spring 18, the fine vibration of the resonance ring 20 by the ultrasonic oscillator 23 is absorbed by the spring 20, and the support frame 12 and the frame body 8 are not absorbed. Since they are hardly transmitted, there is no fear that they will be destroyed by the slight vibration as in the prior art. Further, since the resonance ring 20 is supported by the spring 18, the vibration of the resonance ring itself can be easily shaken, and thus the sieving ability can be improved.
[0012]
Needless to say, the spring supporting the resonance ring is not limited to that shown in this embodiment. Also, the form of the resonance ring is not necessarily the annular form as shown in the figure, and various forms such as a radial form and a spiral form are conceivable.
[0013]
【The invention's effect】
As described above, the vibration sieving machine with an ultrasonic oscillator according to the present invention horizontally supports the resonance ring via a plurality of springs on the support frame fixed to the lower side of the screen mesh frame. Since there is no possibility that the welded part supporting the resonant ring will be destroyed by the micro-vibration of the resonant ring by the ultrasonic oscillator, the durability will be improved and the micro-vibration of the resonant ring itself will be free. It also has a beneficial effect such as improving.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of a vibration sieving machine with an ultrasonic oscillator according to the present invention.
2 is a partial cross-sectional perspective view of a sieving net of the sieving machine with an ultrasonic oscillator shown in FIG. 1;
3 is a partially enlarged sectional view of a sieving net of the sieving machine with an ultrasonic oscillator shown in FIG. 1;
4 is a side view of FIG. 3;
FIG. 5 is a longitudinal sectional view of a conventional sieve screen.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base 2 Vibrating container 4 Vibration motor 8 Frame 9 Sieve net 12 Support frame 18 Spring 20 Resonant ring 23 Ultrasonic oscillator

Claims (1)

A support frame is fixed to the lower side of the frame body on which the sieve net is stretched, and a resonance ring is horizontally supported on the support frame via a plurality of springs, and an ultrasonic oscillator is fixed to the resonance ring. In addition, a vibration sieving machine with an ultrasonic oscillator, wherein the resonance ring is brought into contact with the lower surface of the sieving net by the elasticity of the spring.

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