JPH10109028A - Vibration effect eliminating device for rotary vibration agitator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration effect eliminating device for a rotary vibration agitator in which vibration effects of a vibration plate on a machine body is sharply relieved by improving supports at four corner parts of a shaking plate rotated and installing a new balance weight, fitted in a rotating shaft. SOLUTION: In a rotary vibration agitator having a vibration plate into whose central part an eccentric rotating shaft is inserted and which is horizontally rotated, four corner parts of the vibration plate are supported by bar bodies 9a-9d made of urethane resin and of 3-7mm diameter and about 80-100 hardness excelling in flexibility and vibrationproofing so that it may be horizontally rotated, and also by fitting a balance weight 10 in the eccentric rotating shaft, vibration effects of rotary vibration of the vibration plate on an agitator is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for eliminating the influence of vibration of a rotating vibration stirrer, and more particularly to a vibrating plate which supports the four corners of a rotating rotating stirrer of a stirrer so as to stably rotate horizontally. The present invention relates to an apparatus for eliminating the influence on the stirrer due to the vibration of the stirrer.

[0002]

2. Description of the Related Art An apparatus of this kind is disclosed in Japanese Utility Model Publication No. 61-25857, which is assigned to the present applicant. The publication is the bottom plate 2
An eccentric member 5 is attached to a vertical rotating shaft 4 taken out of the motor 3 above.
And a diaphragm 8 is fitted around the shaft of the eccentric member 5 with a bearing 7 interposed therebetween, and a microplate 12 provided with a plurality of holes for individually storing a small amount of liquid group is mounted on the diaphragm 8. In a shaking table on which a shaking table 11 to be placed is mounted,
A shaker in which four corners are supported by a piano wire supporting leg 9 which is implanted with bending from the corresponding portion surface of the bottom plate 2 so as to be horizontally rotated.

[0003]

However, the thin support leg made of piano wire has a problem that it is broken in a short time due to metal fatigue and cannot support the diaphragm, and the vibration of the diaphragm is hard and the vibration is hard. The problem is that the sound is transmitted to the stirrer body through the piano wire, which is easy to propagate, and the aircraft also vibrates violently due to the turning vibration accompanied by the load movement of the diaphragm, causing noise. is there.

[0004]

According to the present invention, there is provided a swirling vibrating stirrer having a vibrating plate which rotates horizontally by inserting a central portion thereof into an eccentric rotary shaft.
Vibration to the stirrer body due to swirling vibration of the diaphragm, supported by a urethane resin rod with a thickness of mm and a hardness of about 80 to 100 and having flexibility and vibration isolation The balance weight that tunes and rotates under the vibration plate of the eccentric rotation shaft is fitted to reduce the vibration influence on the stirrer due to the load movement of the horizontal rotation of the vibration plate, This problem was solved.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

A motor 3 is mounted on the center of a bottom plate 2 of a casing 1 constituting a stirrer main body, and an eccentric rotating shaft 4 is fitted upwardly on a rotating shaft 3a protruding from the upper surface of the motor 3, and the eccentric rotating shaft is mounted. A vibrating plate 6 that rotates by receiving only eccentric rotation with the bearing 5 interposed therebetween is inserted into the side circumference of the shaft 4. An inner bottom plate 7 is laid and fixed on the bottom plate 2 of the casing 1, and columns 8 having substantially the same height as the motor 3 are erected on four corners of the intermediate bottom plate 7, and four columns of the respective columns 8 and the diaphragm 6 A urethane resin rod 9a having a thickness of 3 mm to 7 mm in diameter and a hardness of about 80 to 100 and having both flexibility and vibration isolation.
Diaphragms 9b, 9c and 9d are stretched to support the diaphragm 6 so as to be horizontally turned. It is desirable that the diameter and hardness of the rod be determined based on a balance between required supporting force and flexibility.

Further, a balance weight 10 is attached to the eccentric rotary shaft 4 below the fitting portion of the diaphragm 6 so as to rotate synchronously.
The balance weight 10 is formed to have a weight portion 10b which spreads out in a fan shape from the fitting hole 10a in a plan view, and is fitted so that the weight portion 10b is positioned on the eccentric side. In other words, the sector 10b is positioned on the side where the vibration is reduced by the eccentric rotation of the diaphragm 6, and is rotated so as to balance the weight balance during the rotation.
The vibration and rattling caused by the turning rotation of the motor are eliminated.

On the vibration plate 6, a shaking table 11 which is exposed on the upper surface of the casing 1 and rotates and rotates together with the vibration plate 6 is fixedly mounted. On the shaking table 11, for example, a microplate or the like containing a sample liquid is mounted. The eccentric rotary shaft 4 is operated by activating the motor 3 with the mounting fixed. The operation of the eccentric rotary shaft 4 rotates the diaphragm 6 and the shaking table 11 with a swivel width corresponding to the amount of eccentricity, and agitates and shakes the sample liquid on the shaking table 11. At this time, since the diaphragm 6 is supported at four corners by urethane resin rods 9a to 9d, the diaphragm 6 always rotates horizontally and stably while rotating, and prevents the urethane resin rod from rotating. Due to the vibrating property, the vibration accompanying the turning rotation of the vibration plate 6 is substantially prevented from propagating to the stirrer main body through the rod. Further, the vibration accompanying the load movement of the turning rotation of the diaphragm 6 is eliminated by the harmonious rotation of the balance weight 10. In addition, the shaking table 6 itself can also be used as a shaking table by exposing itself on the casing 1.

[0009]

According to the present invention, the four corners of the orbiting diaphragm have a thickness of about 5 mm in diameter and a hardness of about 90 and are made of urethane resin having excellent flexibility and vibration-proof properties. Because the rod is supported by the rod, even if the turning rotation is repeated for a long period of time, the rod will not be broken or damaged due to corrosion, making it impossible to support the diaphragm. By virtue of the vibration damping effect, the vibration of the vibration plate hardly propagates to the main body of the stirrer, so that the effect of the vibration can be eliminated.

Also, a balance weight is fitted to the eccentric rotary shaft below the diaphragm so as to rotate with a weight balance between the diaphragm and the diaphragm. This produces an effect that the influence of vibration can be eliminated and generation of noise and the like can be prevented.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of the present invention.

FIG. 2 is a plan view showing a configuration of a rod body and a balance weight on an intermediate bottom plate.

[Description of References] 1 is a casing 2 is a bottom plate 3 is a motor 3a is a rotating shaft 4 is an eccentric rotating shaft 5 is a bearing 6 is a diaphragm 7 is a middle bottom plate 8 is a support 9a to 9d is a urethane resin rod 10 is a balance Weight 10a is fitting hole 10b is fan-shaped weight part 11 is shaking table

Claims (1)

[Claims] 1. A rotating vibrating stirrer having a vibrating plate which is horizontally rotated and rotated by inserting a central portion into an eccentric rotary shaft, wherein four corners of the vibrating plate have a diameter of 3 to 7 mm and a hardness of 80 to 10.
It is supported by a urethane resin rod having a hardness of about 0 and excellent in flexibility and vibration isolation so as to rotate horizontally, and the vibration propagation through the rod during horizontal rotation of the diaphragm is supported. A vibration damping device for a swirling vibrating stirrer, which is damped to reduce the vibration effect on the stirrer. 1. A balance weight which rotates synchronously below the diaphragm of the eccentric rotary shaft is fitted to eliminate the influence of vibration on the stirrer due to the horizontal swiveling load movement of the diaphragm. The described vibration influence eliminating device.