JPH0454805Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a stirrer suitable for stirring and emulsification in the production of creams, milky lotions, etc., especially a small-sized one.

[Conventional technology]

In the conventional device, as shown in FIG. 5, the outer blade 1 is driven by a motor 100, and the inner blade 2 is driven by a motor 100.
It was running on 01. This is a large-scale vacuum emulsification plant, but most of them drive blades to rotate in the same direction. For example, propeller stirrers are most often used for simple stirring of small to medium volumes of dilute liquids. There is. A propeller stirrer in which stirring blades (propellers) rotating in opposite directions are provided on different shafts is known as described in Japanese Utility Model Application Publication No. 59-110028.

[Problem to be solved]

The conventional device shown in FIG. 5 requires the use of two motors, and is not suitable for small-sized devices. In addition, propeller stirrers have the drawback of introducing a large amount of air bubbles into the stirred material, and are not suitable for obtaining a more suitable shear flow, which is important in emulsification and dispersion systems. This was also the case even with propellers that rotate in opposite directions because there was a distance between the propellers. In order to perform emulsification, a device in which outer blades and inner blades are driven to rotate in opposite directions as shown in Figure 5 is desired. It was impossible to use this method with a large device as shown in Figure 5.

Therefore, the object of this invention is to provide a stirrer for stirring a liquid by generating a strong shear flow by driving the outer blades and inner blades to rotate in opposite directions at the laboratory stage.

[Means for solving problems]

In order to achieve the above-mentioned object, this invention fixes one end of a hollow outer shaft to a rectangular plate-shaped outer blade with a notch formed at the longitudinal center and on the left and right sides thereof, and a plate located within the notch of the outer blade. An inner shaft that is rotatably inserted into the outer shaft and protrudes into the notch is fixed to the shaped inner blade,
The rotational force of one motor is transmitted to the outer shaft and the inner shaft as rotations in opposite directions through rotation transmission means such as pulleys and gears.

[Effect]

When the motor is driven and the outer shaft is rotated, the outer blade fixed to the outer shaft rotates, and the rotational force of the outer shaft is transmitted to the inner shaft as rotation in the opposite direction via the rotation transmission means, thereby causing the inner blade to rotate. can be rotated in the opposite direction to the outer blade. At this time, the inner blade rotates within the notch in the outer blade, so a strong shear flow is obtained.

〔Example〕

Preferred embodiments of this invention will be described below with reference to the drawings.

In FIG. 1, a stirring blade is constructed by positioning a plate-shaped inner blade 2 within a notch 1A formed at the longitudinal center of a rectangular plate-shaped outer blade 1 and on its left and right sides. The rotation of the output shaft (not shown) of the motor 3 is transmitted to a bearing chuck 4 either directly or via gears or a shaft (not shown), and an outer shaft 5 is attached to this bearing chuck 4. be. Of course, the outer shaft 5 may be directly connected to the motor 3, or may be connected to the motor 3 without using the bearing chuck 4. The lower end of the outer shaft 5 is fixed to the outer blade 1. An inner shaft 6 is inserted into the hollow outer shaft 5, and bushes 16 and 17 are attached to the inside of the outer shaft to prevent the inner shaft from shaking during rotation and to alleviate friction. (Can also be replaced with a bearing). The lower end of the inner shaft 6 is rotatably supported by a bearing 7 provided on the outer blade 1.
is attached removably. Further, the upper end of the inner shaft 6 and the bearing chuck 4 are connected by a rotation transmission means 8. As an example of the rotation transmission means 8,
As shown in FIG. 1, a gear 9 is attached to the bearing chuck 4, and a gear 10 is meshed with this gear 9. The lower end of a rotating shaft 11 is fixed to this gear 10, and a pulley 12 is attached to the upper end of the rotating shaft 11. , the inner shaft 6
Attach the pulley 13 to the upper end of the
are connected by a belt 14. The agitator configured in this way is attached to the stand 15 so that it can be moved up and down.

To explain the operation of this device in Fig. 2,
Since the output shaft (not shown) of one motor 3 is directly or indirectly connected to the outer shaft 5 to which the rotation of the output shaft is transmitted, by driving the motor 3, the outer shaft 5 is moved in the direction of the arrow X. It can be rotated in any direction. Since a gear 9 is fixed to the bearing chuck 4 which rotates in the same direction as the outer shaft 5, the rotation of the gears 9 and 10 causes the rotating shaft 11 to move in the direction of arrow Y, which is the opposite direction to the outer shaft 5. It will rotate. This rotation of the rotating shaft 11 is transmitted to the inner shaft 6 by the belt 14 connecting the pulleys 12 and 13, and the inner shaft 6 also rotates in the direction of arrow Y. Pulley 12, 13
A conversion mechanism 16 may also be provided at the belt 14. This speed change mechanism 16 is for changing the speed and transmitting the rotation of the rotary shaft 11 to the inner shaft 6, and may be a combination of gears, or may be an electric mechanism that converts the rotation speed of the rotary shaft 11 and transmits the rotation speed of the rotary shaft 11 to the inner shaft 6. It may also be a mechanism that conveys the information. This transmission mechanism 16 can also be provided at the location where the gears 9 and 10 are provided. With this structure, the rotation speed can be easily adjusted.

The pulley 13 attached to the inner shaft 6 may be a multi-stage pulley, for example, a two-stage pulley as shown in FIG. In such a pulley 13, a large diameter pulley 13A and a small diameter pulley 13 are used.
By using B properly, that is, by turning it upside down and attaching it to the upper end of the inner shaft 6.
You can easily change the number of rotations transmitted to the engine. Further, as described above, there is no problem in using a gear instead of this pulley.

In addition, it is also possible to provide second and third inner blades, provide the second and third inner shafts inside the inner shaft 6, and rotate three or four or more blades.

In another embodiment shown in FIG.
This shows a different configuration of . A gear 9 is attached to the output shaft of the motor 3, and a gear 10 is attached to the gear 9.
The outer shaft 5 is attached to the rotating shaft 11 of the gear 10 via the bearing chuck 4, the pulley 12 is attached to the output shaft of the motor 3 or the gear 9, and the pulley 13 is attached to the upper end of the inner shaft 6. The pulleys 12 and 13 are connected by a belt 14, and the other configurations are the same as those of the embodiment described above.

〔effect〕

As explained above, according to this invention, one end of the hollow outer shaft is fixed to a rectangular plate-shaped outer blade in which notches are formed at the longitudinal center and on the left and right sides thereof, and the plate located within the notch in the outer blade is fixed. An inner shaft that is rotatably inserted into the outer shaft and protrudes into the notch is fixed to the shaped inner blade,
The structure is configured so that the rotational force of one motor is transmitted to the outer shaft and the inner shaft as rotations in opposite directions through rotation transmission means such as pulleys and gears, so that the rotational force of one motor is transmitted to the outer shaft and the inner shaft as rotations in opposite directions. Since two motors are not required to rotate the blade and the inner blade separately, the device can be extremely compact. Moreover, propeller stirrers were the only small-sized stirrers used in laboratories, but with this idea, even with a small device, the inner plate-shaped blades could be inserted into the notches of the rectangular plate-shaped outer blades. It is possible to rotate, thereby generating a strong shear flow, and effectively stirring and emulsifying creams, milky lotions, etc., and is extremely suitable for scale-up using large devices of this type. easy,
The transition is smooth. Furthermore, according to this invention, only one motor is required, so it is possible to save energy. Furthermore, it has a simple structure and can be manufactured at low cost. And in the device of this invention,
It is easy to remove the outer and inner shafts and the outer and inner blades, and it is also preferable in terms of cleanability.

[Brief explanation of the drawing]

Fig. 1 is an overall front view showing a preferred embodiment of this invention, Fig. 2 is an explanatory view for explaining the operation of this invention, and Fig. 3 is a front view showing a modification of the pulley attached to the inner shaft. 4 are overall front views showing another embodiment of this invention, and FIG. 5 is a simplified explanatory view showing a conventional device. 1...Outer blade, 2...Inner blade, 3...Motor,
5...Outer shaft, 6...Inner shaft, 8...Rotation transmission means.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. One end of a hollow outer shaft is fixed to a rectangular plate-shaped outer blade with a notch formed at the longitudinal center and on the left and right sides thereof, and a plate-shaped inner blade located within the notch of the outer blade. An inner shaft that is rotatably inserted into the outer shaft and protrudes into the notch is fixed to the blade, and the rotational force of one motor is transmitted oppositely to the outer shaft and the inner shaft through rotation transmission means such as pulleys and gears. A stirrer characterized in that it is configured to transmit rotation as a direction. 2. The agitator according to claim 1 of the utility model registration, characterized in that the rotation transmission means is provided with a speed change mechanism.