JP3837056B2 - Vibrating sieve machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a vibrating sieve that vibrates a vibrating container with a motor, vibrates a sieve mesh stretched in the vibrating container with an ultrasonic vibrator at high frequency, sifts out various powders, granules and the like, and mixes and agitates them. Related to the machine.
[0002]
[Prior art]
In the ultrasonic vibration device disclosed in Japanese Patent No. 3180345, a sieve net is stretched on the bottom of a cylindrical or rectangular tube-shaped vessel-like vibrating container in which a sieve is accommodated, and outside the vibrating vessel. An ultrasonic transducer is provided on the integrally formed protrusion. Also, an ultrasonic vibration sieving machine disclosed in Japanese Patent Application Laid-Open No. 2000-334384 has a pair of mesh sections provided inside a mesh frame on which a sieve mesh is stretched, and an ultrasonic transducer on the lower surface of the mesh section. Is provided.
[0003]
By the way, in the above-mentioned Patent No. 3180345, since the entire vibrating container is to be vibrated by the ultrasonic vibrator, if the output power of the ultrasonic vibrator cannot be considerably increased, the actual screening cannot be performed. Since the ultrasonic transducer which responds to it has not been developed yet, it has not been commercialized or commercialized.
[0004]
Further, when handling pharmaceuticals, foods, etc., even if a slight foreign matter such as vinyl powder or paint peeling powder is mixed in the sieving process, there are many troubles, but this is disclosed in JP-A-2000-334384. In an ultrasonic vibration sieving machine, an ultrasonic vibrator is provided inside the mesh frame. Therefore, the vibration from the ultrasonic vibrator itself or a cable for supplying a high-frequency current to the ultrasonic vibrator is used. As a result, vinyl, paints, adhesives, and the like are rubbed off and mixed as foreign substances, which may cause contamination, and there is a problem that they cannot be used.
[0005]
[Problems to be solved by the invention]
The present invention eliminates the above disadvantages, does not cause foreign matter to be mixed into the sieving material, and the high-frequency vibration of the ultrasonic vibrator is reliably transmitted to the sieving net, so that the required sieving ability can be exhibited and the motor can be used. An object of the present invention is to provide a vibration sieving machine in which the material on the sieving net is moved by vibrating the entire vibrating container, and the sieving is performed with high efficiency.
[0006]
[Means for Solving the Problems]
For this purpose, the vibration sieving machine of the present invention supports the vibrating container so that it can be vibrated by a motor, integrally forms an ear on the outer periphery of an annular mesh frame on which a sieve mesh is stretched, and interposes an elastic support. Thus, the mesh frame is disposed in the vibrating container, the ear part is projected to the outside of the vibrating container, and an ultrasonic vibrator is fixed to the ear part.
Further, in the vibration sieving machine of the present invention, the vibration container is configured by joining a cylindrical body to the upper end opening edge of a bottomed cylindrical container body, and a vibration motor is fixed to the lower part of the container body, An annular mesh frame having ears on the outer periphery is formed from a rigid flat plate, and the mesh frame is disposed with an elastic support between the upper end opening edge of the container body and the cylindrical body, and the lower edge of the cylindrical body An ear portion of the mesh frame is protruded to the outside from a notch formed in a part of the head, and an ultrasonic vibrator is fixed to the ear portion.
[0007]
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 a cylindrical body 2b with a metal band 4 to an upper end opening edge of a bottomed cylindrical container body 2a. Reference numeral 5 denotes a vibration motor fixed to the lower portion of the container body 2a, 6 denotes a non-equilibrium weight attached to the motor shaft, and 7 denotes a material discharge port formed on one side wall of the container body 2a.
[0008]
As shown in FIG. 4, 8 is a mesh frame formed in an annular shape having ears 9 on the outer periphery by cutting a rigid flat plate such as a stainless steel plate having a thickness of 5 to 12 mm with a laser cutter. The sieving net is stretched without loosening by adhering the peripheral part of the sieving net 10 such as a metal net to the upper surface with an adhesive. 2 and 3, the mesh frame 8 is arranged with elastic supports 11 and 12 interposed between the upper end opening edge of the container body 2a and the cylindrical body 2b, respectively. The edge portion 9 of the mesh frame is protruded from a notch 13 formed at a part of the edge, a screw hole 14 is formed in the ear portion, and the attachment shaft 16 of the ultrasonic transducer 15 is screwed into the screw hole. By joining, the ultrasonic transducer 15 is fixed to the ear portion. Reference numeral 17 denotes an annular support member that supports the lower elastic support 11, and the outer peripheral edge of the support member is sandwiched between the upper end opening edge of the container body 2a and the lower edge of the cylindrical body 2b by the metal band 4. I wear it.
[0009]
The elastic supports 11 and 12 are elastic bodies made of silicon sponge having a Shower hardness of about 10 to 20, and the elastic supports 11 and 12 are supported so as not to inhibit the high-frequency vibration of the net frame 8 by interposing the elastic supports 11 and 12. The ultrasonic vibrator 15 includes a ceramic vibrating body, and a high frequency current of 24 kHz to 40 kHz is supplied from the oscillator 18 through the cable 19 to vibrate the mesh frame 8, and the vibration is transmitted to the sieve mesh 10.
[0010]
In the vibration sieving machine configured as described above, the entire vibrating container 2 is vibrated by the operation of the motor 6, and the mesh frame 8 vibrates at high frequency by the ultrasonic vibrator 15, so that the powder charged on the sieving net 10 is charged. Sift materials such as. Since the vibration by the motor 6 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 sieve mesh 10 moves on the sieve mesh 10 in response to the vibration. In particular, the material on the sieve mesh 10 is desired by changing the mounting state of the non-equilibrium weight 6 on the motor shaft. It can be rotated in the direction, or it can be moved toward the outer peripheral direction or the center along with the rotation to be diffused or concentrated. Since the sieving net 10 vibrates at a high frequency with a frequency of 24 kHz to 40 kHz and an amplitude of 3 μm to 5 μm by the ultrasonic vibrator 15 during the movement, the material can be screened with a high screening ability. Thus, the sieving material dropped from the mesh of the sieve mesh 10 is discharged from the discharge port 7.
[0011]
In this vibration sieving machine, since the ultrasonic vibrator 15 is fixed to the ear portion 9 of the net frame 8 protruding from the notch 13 of the cylindrical body 2b, foreign matter is rubbed from the cable 19 or the like due to the high frequency vibration. Even if it peels off, there is no possibility that it will be mixed into the internal material and contaminate it, and the material can always be kept at a high purity.
[0012]
Further, since the mesh frame 8 is supported via the elastic supports 11 and 12 and is not in direct contact with the container main body 2a or the cylindrical body 2b, that is, the vibration container 2, the vibration of the ultrasonic vibrator 15 is The screen 10 can be vibrated at a high frequency with sufficient power without being attenuated by the contact. In addition, since the frequency by the motor 6 is significantly lower than this and the amplitude is large, the vibration is transmitted to the sieve net 10 without being attenuated by the elastic supports 11 and 12.
[0013]
【The invention's effect】
As described above, the vibrating sieve machine of the present invention supports the vibrating container so that it can be vibrated by the motor, integrally forms the ears on the outer periphery of the annular mesh frame on which the sieve mesh is stretched, and provides elastic support. By interposing, the mesh frame is arranged in the vibrating container and the ear part is projected to the outside of the vibrating container, and an ultrasonic vibrator is fixed to the ear part. In addition, the high-frequency vibration of the ultrasonic vibrator is reliably transmitted to the sieve mesh, and the required sieving ability can be demonstrated, and the material on the sieve mesh can be moved by vibrating the entire vibrating container with a motor. And has a beneficial effect to ensure that screening is performed with high efficiency.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of a vibration sieving machine according to the present invention.
2 is a longitudinal sectional view of a main part of the vibration sieve machine of FIG. 1. FIG.
3 is a perspective view of a main part of the vibration sieve machine of FIG. 1. FIG.
4 is a perspective view of a mesh frame of the vibration sieve machine of FIG. 1. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base 2 Vibrating container 2a Container main body 2b Cylindrical body 3 Coil spring 4 Metal band 5 Motor 6 Non-equilibrium weight 8 Net frame 9 Ear part 10 Sieve nets 11, 12 Elastic support 13 Notch 15 Ultrasonic vibrator 17 Support member

Claims (2)

The vibrating container is supported so as to be vibrated by a motor, and an ear is integrally formed on the outer periphery of an annular mesh frame on which a sieve mesh is stretched, and the mesh frame is placed in the vibrating container by interposing an elastic support. The vibrating screen machine is characterized in that the ear part is projected to the outside of the vibrating container and an ultrasonic vibrator is fixed to the ear part. The vibrating container is formed by joining a cylindrical body to the upper end opening edge of a bottomed cylindrical container body, and a vibration motor is fixed to the lower part of the container body, and an annular net having an ear on the outer periphery. The frame is formed from a rigid flat plate, the mesh frame is disposed with an elastic support interposed between the upper end opening edge of the container body and the cylindrical body, and a notch formed in a part of the lower edge of the cylindrical body A vibration sieving machine characterized in that an ear portion of the mesh frame is projected to the outside and an ultrasonic vibrator is fixed to the ear portion.

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