JPH10309453A - Small vibration agitator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an agitator for a small amount of fluid having the agitating capacity of at most of liter and suitable for a laboratory or a private home. SOLUTION: A small vibrating agitator for a small amount of fluid having the agitating capacity of 10 liter or less is constituted of one vibrating shaft for transmitting directly the vibration of a vibrating motor without the help of a spring and vibrating blades of 1-6 pieces fixed on the vibrating shaft, and with the vibration frequency of 10-100 Hz, the number of vibrations of 300-10000/min the vibration number acceleration of 5-10 G and the amplitude of 0.1-8 mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibratory stirrer for a small amount of fluid.

[0002]

2. Description of the Related Art The inventor of the present invention has proposed a vibration stirring technique in Japanese Patent Publication No. Hei 6-71544 (Japanese Patent Application Laid-Open No. Hei 3-275130). ５００500 liters) of stirring, and we have searched for and pursued vibration stirring conditions suitable exclusively for stirring large tanks. Stirring conditions in the above-mentioned publication are 8-20 mm in amplitude and 200-60 in frequency.
0 times / minute.

[0003] Only recently, there is a prospect of practical use of a vibrating stirrer for a large tank, and when it was attempted to apply it to an experimental or household stirrer of 10 liters or less, unexpectedly, a vibrating stirrer for a large tank was used. It has been found that a favorable stirring state cannot be achieved under stirring conditions. In addition, large stirrers use a method in which the vibration of the vibration motor is transmitted to the vibration axis with the help of a spring, thereby preventing the vibration of the vibration motor from being transmitted to the container itself and causing noise pollution. It turned out that the vessel did not need the help of a spring.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a stirrer for small-volume fluid having a volume of fluid to be stirred of 10 liters or less, which is suitable for laboratory use or home use.

[0005]

SUMMARY OF THE INVENTION The present invention provides a 10 liter capacity comprising a vibration shaft for directly transmitting the vibration of a vibration motor without the aid of a spring and one to six vibration blades fixed thereto. The following small vibrating stirrer for small amount of fluid, having a vibration frequency of 10 to 100 Hz and a frequency of 3
000 to 10000 times / min, preferably 3500 to 90
00 times / minute, particularly preferably 3500 to 8000 times /
The present invention relates to a small-sized vibrating stirrer having a frequency acceleration of 5 to 10 G and an amplitude of 0.1 to 8 mm, preferably 0.2 to 5 mm.

[0006] In the present invention, the vibrating blade is arranged such that the lowermost blade moves downward by 5 to 5 with respect to a direction perpendicular to the vibration axis.
It is desirable that the blades are inclined by 30 °, preferably 10 to 20 °, and the other blades are inclined upward by 5 to 30 °, preferably 10 to 20 °. Thereby, the stirring efficiency of the system can be greatly improved.

[0007] The size and number of the vibrating blades correspond to the capacity of the vibrating motor, but it is preferable that the vibrating blades be as large as possible in order to stir the whole container uniformly and efficiently. Therefore, instead of making the outer shape of the vibrating blade as large as possible, a slit may be provided in the vibrating blade to reduce the resistance received by the vibrating blade due to vibration. The area of the slit portion can be 40% or less, preferably 30% or less, and 5% or more with respect to the entire external surface area of the vibrating blade including the slit portion.

In the present invention, a small tank of 10 liters or less, preferably 5 liters or less is intended to be agitated. Therefore, it is preferable to use a motor as small as possible for easy handling and holding. It is important in terms of fatigue. Therefore, the input W number of the motor is 60 W or less, preferably 25 W or less, particularly preferably 15 to 25 W, and in some cases, a small motor driven by an AA battery can be used. Further, in the present invention, it is needless to say that a slider or an inverter can be used as needed.

The viscosity of the target fluid is preferably 500 cPs or less. Fluids include liquids, powders, and granules.
It is also suitable for powders and granules dispersed in a liquid.

[0010]

FIG. 1 is a schematic view of a compact vibrating stirrer according to the present invention. 1 is a motor, 11 is a vibration generator, 21 is a vibrating rod, 24, 25, 26, and 27 are vibrating blades mounted 15 degrees upward from the horizontal direction of the vibrating rod 21.
Reference numeral 8 denotes a vibrating blade attached downward by 15 ° from the horizontal direction of the vibrating rod 21. These vibrating blades are oscillating rod 21
Are fixed to the threaded portion while adjusting the distance between them by a group of nuts 23.

FIG. 2 shows an example of a vibration motor that can be used in the present invention. A screw-shaped crest 3 is cut at the tip of the rotating shaft 2 of the motor 1, and a gear 4 that can rotate by receiving rotation of the rotating shaft 2 of the motor by teeth 5 fitted to the crest 3 is provided. An eccentric projection 6 is provided on the gear 4 at a position eccentric from the center of rotation. The fitting frame 7 is put on the eccentric projection 6 in order to transmit to the vibrating rod 21 that the eccentric projection 6 moves up and down with the rotation of the gear 4. Fitting frame 7
In order to absorb the lateral movement of the eccentric projection 6 so that the eccentric projection 6 moves up and down in a circular locus, a groove is provided in the lateral direction with a width corresponding to the diameter of the eccentric projection 6. It has a structure. FIG. 3 shows it in a sectional view.

As shown in FIG. 3, the rotation of the gear 4 causes the eccentric projection 6 to vibrate up and down while drawing a circular locus. The vibration rod 21 is attached by 8, and the vibration of the fitting frame 7 is the vibration of the vibration rod 21.

The vibration motor is not limited to a type that converts the circular trajectory of the eccentric projection into vertical movement as shown in FIGS. 2 and 3, but is attached to the rotating shaft 31 of the motor 1 as shown in FIG. An eccentric weight 33 is attached to the rotating plate 32, and the eccentric weight 33 causes the entire motor 1 to vibrate.
May be transmitted to the vibration shaft 21 via the

FIG. 9 shows another embodiment. 9 has an eccentric weight 33 attached to a rotating plate 32 attached to a rotating shaft 31 of the motor 1 and transmits the vibration of the entire motor 1 to the diaphragm 34 because of the eccentric weight 33. 9 is characterized in that the vibrating rod 21 is fixed to a bowl-shaped vibration transmitting member 36, and the upper end of the vibrating rod 21 is held down by one or more leaf springs 35. Vibrating rod 2
1 can be concentrated on vibration.

The motor 1 in these devices is a hand grip via an arbitrary cushioning material and can be attached to a support. This type simplifies the connection with the vibration motor equipment, and can be driven by a 1.5 V to 24 V DC battery. Examples of this type of motor include Mabuchi Motor RE-280RA-2865, RS-
365SH-2080 and the like.

Whether used for home use or for laboratory use, edible oil or the like penetrates into the structure where the vibrating blade is fixed to the vibrating rod,
If there is a risk that cleaning may not be sufficient, use screws as much as possible.If metal materials are used, weld or bond them together.If plastic materials are used, mold or weld them together. It is preferable to prevent oil and the like from entering as much as possible.

[0017] The thickness of the vibrating blade is 0.1 to
It is preferably about 0.3 mm and about 0.2 to 1.0 mm for plastic.

4 to 7 show various shapes of the vibrating blade. The shape of the vibrating blade is not limited to this, and various shapes can be adopted. Also, the shape of the slit 29 is not limited to the one shown in the figure, and can take various shapes.

When the vibrating blade 24 does not need to be tightened with the nut 23 or a screw as it is, the vibrating blade 24 can be fixed to the vibrating rod 21 by adjusting the positional interval by a spacer instead of the nut. 7
As shown in FIG.
, And a nut 23 or a spacer can be used from above. When a large number of vibrating blades are used as shown in FIG. 1, all the nuts except for the nuts at both ends can be replaced with spacers. In addition, it is preferable that a desired angle of the vibrating blade is given to the spacer. Thus, when the vibrating blade is attached to the vibrating shaft using the spacer, a predetermined angle can be given to the vibrating blade.

[0020]

EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited thereto.

Example 1 In the compact vibrating stirrer of FIG. 1, the dimensions of the vibrating blade attached to FIG. 4 were as follows: m = 270 mm, n = 70 mm, p = 50 mm, q = 1
2 mm, r = 50 mm, s = 4 mm, (surface area of slit) ス リ ッ ト (metal area of outer frame metal of blade) × 10
0 (%) = (4 × 19 × 8) ÷ (50 × 50) × 100
= 608 ÷ 2500 × 100 = 24.32 (%) 15 ° with respect to the horizontal direction of the angle of the vibrating blade Motor used 100V, 15W Frequency 7200 times / min (60Hz) Vibration acceleration 8G Amplitude 4mm Thickness of stainless blade 0. 2mm Stainless steel blade holder thickness 1mm Blade spacing 15mm Vibration axis (stainless steel) 5mm

Using the small vibration stirrer, the white melamine resin paint for spray coating and the black melamine resin paint for spray coating, which were put into a 5-liter container, were stirred until a uniform murine color was obtained. The result of the stirring was able to be uniformly mixed in 1/4 time as compared with a propeller type stirrer (15 W, 100 V).

[0023]

[Table 1]

Example 2 To 100 parts by weight of melamine resin clear lacquer was added 5 parts by weight of rutile-type hardened titanium, and the mixture was stirred for 60 seconds using the small vibration stirrer used in Example 1.

When the dispersibility was examined using a JIS sedimentation tube, no sedimentation occurred during the day and night. on the other hand,
When a 15 W, 100 V propeller type stirrer was used, separation occurred in about 6 hours.

When the dispersibility was examined with a finesse gauge according to JIS, the dispersibility of this example was 8 to 10, but the dispersibility of the propeller type stirrer was 4 to 10.
~ 5, which was pretty bad.

[0027]

According to the present invention, a propeller-type stirrer for a conventional laboratory and a propeller-type agitator for a home are available. It was possible to improve the agitation efficiency as well as to provide it.

[Brief description of the drawings]

FIG. 1 is a schematic view showing one specific example of a small vibration stirrer of the present invention.

FIG. 2 is a schematic view showing an example of a vibration motor used for the small vibration stirrer of the present invention.

FIG. 3 is a cross-sectional view showing one example of a vibration generator used in the small vibration stirrer of the present invention.

FIG. 4 is a plan view showing an example of a vibrating blade according to the present invention.

FIG. 5 is a plan view showing another example of the vibrating blade of the present invention.

FIG. 6 is a plan view showing another example of the vibrating blade of the present invention.

FIG. 7 is a plan view showing another example of the vibrating blade of the present invention.

FIG. 8 is a cross-sectional view showing another example of the vibration generator used in the small vibration stirrer of the present invention.

FIG. 9 is a cross-sectional view showing another example of the vibration generator used in the small vibration stirrer of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor 2 Rotating shaft of motor 3 Screw-shaped thread 4 Gear 5 Gear tooth 6 Eccentric projection 7 Fitting frame 8 Mounting member 11 Vibration generating part 12 Guide rod 13 Guide guide 14 Frame 21 Vibrating rod 22 Screw part 23 Nut 24 Vibrating blade 25 Vibrating blade 26 Vibrating blade 27 Vibrating blade 28 Vibrating blade 29 Slit 30 Fixed member 31 Rotary shaft 32 Rotating plate 33 Eccentric weight 34 Vibrating plate 35 Leaf spring 36 Vibration transmitting member

Claims (3)

[Claims] 1. A small-sized vibrating stirrer for a small volume fluid having a capacity of 10 liters or less, comprising one vibrating shaft for directly transmitting the vibration of a vibrating motor without the help of a spring and one to six vibrating blades fixed thereto. A vibration frequency of 10 to 100 Hz and a frequency of 3000 to 10000 times /
A small-sized vibrating stirrer characterized by having a frequency acceleration of 5 to 10 G and an amplitude of 0.1 to 8 mm. 2. The vibrating blade is such that the lowermost blade is inclined downward by 5 to 30 ° and the other blade is inclined upward by 5 to 30 ° based on a direction perpendicular to the vibration axis. The small vibrating stirrer according to claim 1, wherein 3. The small vibrating stirrer according to claim 1, wherein a slit of 40% or less is provided with respect to a total surface area of the vibrating blade.