JP3837075B2 - Electromagnetic vibration sieve machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration sieving machine that vibrates a sieve mesh by electromagnetic force, screens various powders, granules, and the like, and mixes and agitates them.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an ultrasonic vibration device disclosed in Japanese Patent No. 3180345 and an ultrasonic vibration sieve disclosed in Japanese Patent Laid-Open No. 2000-334384 have been known.
[0003]
By the way, since this type of conventional vibration sieve machine oscillates an ultrasonic vibrator at a single frequency, the sieve mesh becomes a uniform monotonous vibration, and therefore, the powder on the sieve mesh, The material such as particles only had a uniform and constant movement with little change. For this reason, the material is more likely to be hardened or clogged on the sieve screen, and the necessary sieving ability may not be obtained. Such a defect cannot be solved even if the frequency setting of the high-frequency current is appropriately adjusted in advance.
[0004]
[Problems to be solved by the invention]
The present invention eliminates the above-mentioned drawbacks, demonstrates the required sieving capability by causing the sieve screen to vibrate in a complex manner, and the material on the sieve screen is moved by vibrating the entire vibrating container by a motor. It is intended to provide a vibrating sieving machine in which sieving is performed.
[0005]
[Means for Solving the Problems]
For this purpose, the electromagnetic vibration sieving machine of the present invention has a moving coil arranged in the magnetic field of a fixed magnet, and the moving coil is fixed to the upper or lower surface of the sieve net stretched in the mesh frame, so that various frequency components are mixed. The sieving net is vibrated by applying an audio current whose waveform and amplitude change over time to the moving coil.
Further, the electromagnetic vibrating screen of the present invention supports the vibrating container so that it can be vibrated by a motor, and arranges an annular mesh frame on which the sieve net is stretched in the vibrating container, and in the magnetic field of the fixed magnet. The moving coil is arranged, the moving coil is fixed to the upper surface or the lower surface of the sieve mesh, and the screen is obtained by applying an audio current in which various frequency components are mixed and the waveform and amplitude fluctuate with time to the moving coil. It is characterized by vibrating the net.
[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 vibration sieving machine according to the present invention. Reference numeral 1 denotes a base, and 2 is a vibration container supported by a coil spring 3 on the base. The vibrating container 2 is configured by joining an upper cylindrical body 2b to a top opening edge of a bottomed cylindrical container body 2a by a metal band 4, and a material charging port 5 is formed on the upper cylindrical body 2b and a material is disposed on a side wall. Each outlet 6 is opened. Reference numeral 7 denotes a material discharge port opened on the side wall of the container body 2a. Reference numeral 8 denotes a vibration motor fixed to the lower portion of the container main body 2a by a support 9. Reference numerals 10 and 11 denote non-equilibrium weights attached to the motor shaft.
[0007]
Reference numeral 12 denotes an annular mesh frame supported in the vibrating container 2 by sandwiching an outer peripheral flange between the container main body 2a and the upper cylindrical body 2b, and a screen mesh 13 such as a wire mesh is provided in the mesh frame. By adhering the peripheral edge with an adhesive, it is stretched horizontally without slack. A plurality of support rods 15 are fixed to the lower side of the mesh frame 12 by welding, and an electromagnetic induction vibrator 16 composed of a magnet and a moving coil is fixed to an intersection of the support rods 15 by bolts 15a. The electromagnetic induction vibrator 16 is supported at the lower part of the sieve net 13.
[0008]
As shown in FIGS. 2 and 3, in the electromagnetic induction vibrator 16, a ring-shaped fixed magnet 17 which is a permanent magnet is loaded on a yoke 18, and an electric wire is wound around a bobbin 20 in the magnetic field of the fixed magnet. The moving coil 19 is disposed, and the upper end of the bobbin 20 of the moving coil is brought into contact with the lower surface of the sieve screen 13 and fixed with an adhesive. 21 is a flexible cover provided to cover the gap between the outer peripheral edge of the upper end of the bobbin 20 and the upper outer peripheral edge of the yoke 18, 22 is an electric cable led out from the moving coil 19, and 23 is the cable It is a connection terminal for electric cables.
[0009]
Then, a player 24 that can reproduce a compact disc (CD) or the like on which an audio signal is recorded and its output signal amplifier 25 are connected as shown in FIG. 4, and the connection terminal 23 is connected to the audio current output of the amplifier 25. The audio current is applied to the moving coil 19 connected to the terminal. As shown in the waveform of FIG. 5, this audio current requires various frequency components to be mixed and the waveform and amplitude to vary with time, so that the frequency components range from low to high. A voice current obtained from a recording of music in which various instrumental performances mixed in a wide range (20 Hz to 20000 Hz) and changing over time is desirable. When such an audio current is applied to the moving coil 19, the moving coil 19 in the magnetic field vibrates due to electromagnetic induction, and the sieve net 13 vibrates at such a wide range of frequencies. Since it fluctuates with time, it is possible to move materials such as powders and granules on the sieve net 13 in a complicated manner, and to screen and mix and stir with high efficiency.
[0010]
Further, when the non-equilibrium weights 10 and 11 are rotated by the motor 8, the entire vibrating container 2 vibrates. Since the vibration caused by the motor 8 depends on the rotational speed of the rotating shaft, the frequency is as low as 20 Hz to 60 Hz and the amplitude is as large as 0.8 mm to 10 mm. For this reason, the material on the screen mesh 13 moves on the screen screen 13 in accordance with the vibration, and in particular, the material on the screen screen is changed by changing the mounting state of the non-equilibrium weights 10 and 11 with respect to the motor shaft. Can be rotated in a desired direction, or moved toward the outer peripheral direction or the center along with the rotation to be diffused or concentrated. Since the sieving mesh vibrates as described above by the moving coil 19 during the movement, the material can be sieved with a high sieving ability, and the material dropped from the mesh is discharged from the discharge port 7. In this way, due to the synergistic action of the vibration by the moving coil 19 and the vibration by the motor 8, the material charged from the charging port 5 continuously moves on the sieve screen and is screened with high capacity.
[0011]
In this embodiment, the moving coil 19 is fixed to the lower surface of the sieve mesh 13 with an adhesive. However, even if the electromagnetic induction vibrator 16 is provided on the upper portion of the sieve mesh 13 and the moving coil is fixed to the upper surface of the sieve mesh 13. In addition, as the fixing means, various known means can be used in addition to using an adhesive.
In this embodiment, an example in which only one electromagnetic induction vibrator including a magnet and a moving coil is provided has been described. However, the excitation capability can be further increased by providing a plurality of electromagnetic induction vibrators.
[0012]
【The invention's effect】
As described above, the electromagnetic vibration sieving machine of the present invention has the moving coil disposed in the magnetic field of the fixed magnet, and the moving coil is fixed to the upper surface or the lower surface of the screen mesh that is stretched substantially horizontally in the mesh frame. Since the sieving net is vibrated by applying an audio current in which various frequency components are mixed and the waveform and amplitude fluctuate with time to the moving coil, a single frequency as in a conventional sieving machine is used. In addition to inducing vibration, the vibration motion can be varied with a wide range of frequencies over time. Therefore, there is a beneficial effect that powders and granules having various properties can be screened very efficiently or can be mixed and stirred.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of an electromagnetic vibration sieving machine according to the present invention.
2 is a longitudinal sectional view of a main part of the electromagnetic vibration sieving machine of FIG.
3 is a cross-sectional view taken along line AA in FIG.
FIG. 4 is an external view showing an embodiment of an electromagnetic vibration sieving machine according to the present invention.
FIG. 5 is a waveform diagram showing an example of audio current in the electromagnetic vibration sieving machine according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base 2 Vibrating container 2a Container main body 2b Upper cylindrical body 8 Motor 10, 11 Non-equilibrium weight 12 Net frame 13 Sieve net 15 Supporting rod 16 Electromagnetic induction vibrator 17 Fixed magnet 18 Yoke 19 Moving coil 20 Bobbin 24 Player 25 Output signal amplifier

Claims (2)

A moving coil is placed in the magnetic field of a fixed magnet, and the moving coil is fixed to the upper or lower surface of a screen mesh stretched in a mesh frame. An electromagnetic vibration sieving machine that vibrates the sieve mesh by applying an electric current to the moving coil. The vibrating container is supported so as to be vibrated by a motor, and an annular mesh frame with a screen mesh is disposed in the vibration container, and a moving coil is disposed in the magnetic field of the fixed magnet, The electromagnetic wave characterized in that the moving coil is fixed to the upper surface or the lower surface, and the screen mesh is vibrated by applying to the moving coil an audio current in which various frequency components are mixed and the waveform and amplitude vary with time. Vibrating sieve machine.

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