JP2009190026A - Agitator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an agitator which can improve the efficiency of agitation and is excellent in versatility. <P>SOLUTION: The agitator comprises: a container 18 for storing an agitation material to be agitated; an agitation blade for agitating the agitation material in the container 18; a motor 12 (rotation driving means) for rotatively driving the agitation blade; and a vertically driving means 16 for vertically moving the agitation blade. The agitation blade is rotatively driven by the motor 12 and, at the same time, is vertically moved by the vertically driving means 16 upon agitation. The container 18 can be mounted and retained on a rotary stand 20 rotatively driven by a rotary stand driving means. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a stirrer that stirs a stirrer such as a fluid, a granular material, or a solid contained in a container using a stirring blade.

  Conventionally, a stirrer has been used to stir liquids, granular materials, and the like (see, for example, Patent Document 1). This stirrer is provided with a container for storing the agitated material to be agitated, a stirring blade for stirring the agitated material in the container, and a rotation driving means for rotationally driving the stirring blade. The stirring blade is rotationally driven in a predetermined direction by the rotational driving means.

Japanese Patent Laid-Open No. 10-128662

  In such a stirrer, the stirring blades are rotated in a predetermined direction only to stir the stirrer accommodated in the container. Therefore, it takes time to stir the stirrer as required, and the stirrer time There is a problem that it becomes long, and it is desired to realize a stirrer with high stirring efficiency. Moreover, realization of a highly versatile stirrer that can easily stir various agitated materials is desired.

  An object of the present invention is to provide a stirrer that can improve stirring efficiency and is excellent in versatility.

  The stirrer according to claim 1 of the present invention includes a container for storing a stirring material to be stirred, a stirring blade for stirring the stirring material in the container, and a rotation driving means for rotationally driving the stirring blade. And a vertical drive means for moving the stirring blade up and down, and when stirring the agitated material, the stirring blade is rotationally driven by the rotational drive means and is moved up and down by the vertical drive means It is characterized by.

  In the stirrer according to claim 2 of the present invention, the stirrer further includes a turntable for placing the container, and a turntable drive means for driving the turntable to rotate. The rotating table is rotationally driven by the rotating table driving means.

  According to a third aspect of the present invention, there is provided a stirrer comprising: a container for storing a stirring object to be stirred; a turntable for mounting the container; and a turntable drive means for driving the rotation shaft to rotate. And a stirring blade for stirring the agitated material in the container, and a rotation driving means for rotationally driving the stirring blade, and when the agitated material is stirred, the stirring blade is predetermined by the rotation driving means. The rotating table is driven to rotate in the direction opposite to the predetermined direction by the rotating table driving means, and the number of rotations of the stirring blade is equal to or greater than the number of rotations of the rotating table. It is characterized by.

  Further, in the stirrer according to claim 4 of the present invention, the stirring blade is attached to a rotating shaft, and a rotating shaft position changing means for moving the rotating shaft in a horizontal direction is provided. .

  Furthermore, the stirrer according to claim 5 of the present invention is characterized in that an elastic body is provided in a portion of the stirring blade facing the inner peripheral surface of the container.

  According to the stirrer described in claim 1 of the present invention, the stirring blade is driven to rotate by the rotation driving means and is moved up and down by the vertical driving means, so that the stirring is performed while circulating the entire stirring material accommodated in the container. This makes it possible to efficiently stir the agitated material and effectively agitate the agitated material regardless of the hardness, viscosity, particle size, etc. of the agitated material. Can be provided.

  Further, according to the stirrer according to the second aspect of the present invention, the container containing the agitated material is placed on the rotating table, and the container is rotated together with the rotating table. The rotational force of the stirring blade acts, and stirring can be performed more efficiently.

  Further, according to the stirrer according to claim 3 of the present invention, the stirring blade is rotated in a predetermined direction by the rotation driving means, and the container for storing the agitated material is rotated in the direction opposite to the predetermined direction together with the rotary table. In addition, since these rotational speeds are predetermined conditions, the stirred product can be stirred efficiently and can be stirred effectively regardless of the hardness, viscosity, particle size, etc. of the stirred product, A highly versatile stirrer can be provided.

  Further, according to the stirrer according to claim 4 of the present invention, since the rotating shaft to which the stirring blade is attached is movable in the horizontal direction, by moving the rotating shaft and decentering the stirring blade, The inner surface of the container can be cleaned in contact with the inner peripheral surface.

  Furthermore, according to the stirrer according to claim 5 of the present invention, since the elastic body is provided in the portion of the stirring blade facing the inner peripheral surface of the container, when the stirring blade is brought into contact with the container In addition, this elastic body acts on the inner peripheral surface of the container, whereby damage to the container and / or the stirring blade can be prevented.

The perspective view which shows one Embodiment of the stirrer according to this invention. Fig.2 (a) is a front view which shows the stirring blade in the stirrer of FIG. 1, and FIG.2 (b) is a side view which shows the stirring blade. The simplified explanatory view for demonstrating use of the stirrer of FIG. 4A shows a state where the container and the rotation shaft are concentrically positioned in the stirrer of FIG. 1, and FIG. 4B shows a position where the container and the rotation shaft are eccentric in the stirrer of FIG. The figure which shows the state to do. The figure which shows the relationship between the rotation conditions and mixing time when rotating a stirring blade and a turntable with the relative rotation speed of 70 rpm. FIGS. 6A and 6B are diagrams showing changes in the mixed state over time in Examples 1 and 2. FIG. FIG.7 (c)-(d) is a figure which shows the change of the mixing state by progress of time in Comparative Examples 1-3.

  Hereinafter, an embodiment of a stirrer according to the present invention will be described with reference to the accompanying drawings. In FIG. 1, the illustrated agitator 10 includes a support body 2 installed on a floor surface of a factory, and the support body 2 is provided with a turntable 20 and a box 32. The turntable 20 is drivingly connected to a motor (not shown) as a rotation drive source, and is rotated in a predetermined direction with respect to the support body 2 by this motor. The turntable 20 is provided with a holding member 38, and the container 18 in which an agitated material to be stirred (for example, liquid, granular material, solid, etc.) is placed is placed on the upper surface of the turntable 20, and is held by the holding member 38. It is held fixed.

  The box body 32 is provided with a vertical driving means 16, and the stirring mechanism 4 is attached via the vertical driving means 16 via a support frame 28 (which constitutes a rotation axis position changing means). The vertical driving means 16 is a vertical sliding member 30 that slides in the vertical direction, a bar screw (so-called ball screw mechanism) (not shown) that moves the sliding member 30 up and down, and a rod screw that rotates. And a sliding member 30 is moved up and down by a motor and a rod screw as will be described later. The rod screw and the motor are built in the box body 32.

  The support frame 28 includes a support base 34 fixed to the slide support base 34 of the vertical driving means 16, and a horizontal sliding member 36 slidably supported on the support base 34 in the X-axis direction (horizontal direction). The horizontal sliding member 36 is fixed to the support base 34 by screws. Accordingly, by loosening the screw, the horizontal sliding member 36 can be moved horizontally in the X-axis direction to change the relative position with respect to the support base 34.

  The agitation mechanism 4 includes a motor 12 (which constitutes a rotation driving means), a rotary shaft 22 that is rotationally driven by the motor 12, and an agitation blade 14 for agitating the agitated material. The motor 12 is attached to the horizontal sliding member 36 and is slid in the X-axis direction integrally with the horizontal sliding member 36. The motor 12 is configured to be rotatable in a predetermined direction (forward rotation) and in a direction opposite to the predetermined direction (reverse rotation). The rotating shaft 22 extends downward toward the turntable 20, and the stirring blade 14 is attached to the tip portion thereof. Therefore, when the motor 12 rotates forward (or reversely), the stirring blade 14 is rotated in a predetermined direction (or a direction opposite to the predetermined direction) integrally with the rotating shaft 22.

  With reference to FIG. 2, in this embodiment, the stirring blade 14 is composed of two blade members 24, and these blade members 24 are attached to the tip of the rotating shaft 22. As shown in FIG. 2B, the two blade members 24 are disposed so as to be inclined in opposite directions. Further, as shown in FIG. 2A, the blade members 24 are formed with rubber members 26 (elastic bodies) at portions facing the inner surface of the container 18 (that is, the inner peripheral surface and the bottom surface of the container 18). ) Is provided.

  In this embodiment, as shown in FIG. 3, the box is provided with five sensors A, B, C, D, E at intervals in the vertical direction (sliding direction of the vertical sliding member 30). It has been. The uppermost sensor A and the lowermost sensor E function as a limiter for safety, and the upper and lower sliding members 30 are prevented from moving upwardly beyond the uppermost sensor A and the upper and lower sliding members 30. The downward movement beyond the lowest sensor E is prevented.

  The second sensor B from the top functions as an original position detection sensor. When this sensor B detects the vertical sliding member 30, the vertical sliding member 30 is positioned at the original position. The third sensor C from the top functions as a position detection sensor that detects the rotation start position and rotation end position of the stirring blade 14. The third sensor C from the top functions as an upward movement limiting sensor that limits the upward movement of the vertical sliding member 30, and the fourth sensor D from the top limits the downward movement of the vertical sliding member 30. Therefore, the vertical sliding member 30 is reciprocated in the vertical direction between the sensor C and the sensor D, and the distance S between the sensors C and D is equal to the vertical reciprocating stroke. Become. Since the stroke is set in this way, the stroke can be freely changed by changing the arrangement positions of the sensor C and the sensor D.

  The motor 12 of the stirring mechanism 4, the motor (not shown) of the vertical drive means 16 and the motor (not shown) of the turntable 20 are controlled by a sequencer (constituting a control device) as described later. Further, detection signals from the five sensors A to E installed in the box 32 are fed back to the sequencer.

  Next, agitation of the agitated material using the agitator 10 will be described. In order to stir the agitated material, the agitated material (for example, liquid) to be agitated is accommodated in the container 18, and the container 18 accommodating the agitated material is placed on the turntable 20 and fixed and held by the holding member 38. Then, a switch (not shown) may be turned on in such a state where it is placed and held. Thus, the support frame 28 attached to the vertical sliding member 30 is lowered from the state where the sensor B detects the original position to the position where the sensor C detects the vertical sliding member 30 in accordance with a command from the sequencer. Then, the stirring blade 14 is inserted in the vicinity of the opening of the container 18 attached to the turntable 20 by descending.

  When the sensor C detects the vertical sliding member 30, a detection signal from the sensor C is sent to the sequencer. Based on the detection signal, the sequencer operates the motor 12 of the stirring mechanism 4 to rotate the stirring blade 14. Starts and the stirring operation is performed on the stirring object. Thereafter, in accordance with a command from the sequencer, the vertical sliding member 30 is reciprocated up and down while the rotation of the stirring blade 14 is maintained. That is, the vertical sliding member 30 is reciprocated up and down between the sensor C and the sensor D, whereby the stirring blade 14 also reciprocates in the vertical direction in the container 18 through the support frame 28, the motor 12 and the rotating shaft 22. As a result, the agitated material in the container 18 is uniformly agitated by the agitating action of the agitating blade 14. During this stirring, the motor 12 may be rotated in the forward and reverse directions automatically or manually. In this case, the stirring blade 14 reciprocates in the vertical direction while rotating in the predetermined direction and the direction opposite to the predetermined direction. Moved.

  In this stirrer 10, since one stirring blade 14 is reciprocated up and down while rotating in a predetermined direction, the agitated material (for example, liquid) in the container 18 is separated near the upper part and / or the lower part of the container 18. The stirrer can be efficiently and uniformly stirred without staying near the middle. Further, since the blade member 24 of the stirring blade 14 is inclined with respect to the rotation shaft 22, the stirred material circulates in the vertical direction in the container 18, and the stirred material can be stirred more effectively and efficiently. Furthermore, it can stir more uniformly by switching the stirring blade 14 to the predetermined direction and the direction opposite to the predetermined direction.

  When the stirring by the stirring blade 14 is performed for a predetermined time and the sensor C detects the vertical sliding member 30, the sequencer stops the operation of the motor 12 of the stirring mechanism 4 based on the detection signal from the sensor C. The rotation of 14 stops. Thereafter, when the vertical sliding member 30 is raised and the sensor B detects the vertical sliding member 30, the upward and downward sliding member 30 is moved up based on the detection signal from the sensor B and positioned at the original position. In this way, a series of stirring operations by the stirrer 10 is completed.

  In this embodiment, the horizontal sliding member 36 can be moved in the horizontal direction in the X-axis direction, and the following features are associated with this. When stirring the agitated material, as shown in FIG. 4A, the rotating shaft 22 (in other words, the stirring blade 14) of the stirring mechanism 4 is arranged concentrically with the center of the container 18, and the stirring blade 14 is placed in the container. It rotates without contacting the inner peripheral surface of 18. On the other hand, when the horizontal sliding member 36 is horizontally moved from the state shown in FIG. 4A in the X-axis direction as required and shown in FIG. Eccentric in the X-axis direction with respect to the center. In this eccentric state, when the agitating blade 14 is rotated as described above and the rotating table 20 on which the container 18 is placed and held is rotated, the rubber member 26 of the rotating agitating blade 14 causes the inner peripheral surface of the container 18 to rotate. The inner peripheral surface of the container 18 can be cleaned by the rubber member 26 by acting in contact with the rubber member 26.

  During the cleaning, the stirring blade 14 may be moved in the vertical direction in the Z-axis direction by the vertical driving means 16. Thus, when it is moved in the vertical direction, the rubber member 26 of the rotating stirring blade 14 is brought into contact with the inner bottom surface of the container 18 so that the inner bottom surface of the container 18 can be cleaned. By cleaning in this way, the cleaning of the container 18 after the completion of the stirring operation can be omitted, or this cleaning can be simplified. In addition, the two-dot chain line in FIG. 4 (a) and (b) has shown the outermost rotation locus | trajectory of the stirring blade 14. FIG.

  In this stirrer 10, the rotating base 20 and the stirring blade 14 of the stirring mechanism 4 may be rotated in opposite directions to stir the agitated material. In this case, it is desirable that the number of revolutions of the stirring blade 14 be equal to or greater than the number of revolutions of the turntable 20, and thus the turntable 20 (that is, the container 18 containing the agitated material) and the stirring blade 14 , The stirring action by the stirring blades 14 works effectively on the stirred product, and the stirred product can be efficiently stirred. At this time, the agitated material can be more effectively stirred by reciprocating the stirring blade 14 in the vertical direction as described above.

As mentioned above, although embodiment of the stirrer according to this invention was described, this invention is not limited to this embodiment, Various deformation | transformation thru | or correction | amendment are possible, without deviating from the scope of this invention, In the application Also, it can be used for stirring foods, medicines, industrial products and the like.
[Examples and Comparative Examples]

In order to confirm the stirring effect of the stirrer of the present invention, the following stirring experiment was performed. This stirring experiment was performed using a stirrer having the form shown in FIGS. As the stirring blade of the stirrer, an anchor blade having an outer diameter (d) of d = 175 mm and a vertical width (W) of W = 150 mm was used. Further, a container having an inner diameter (D) of D = 190 mm was used, and the ratio (d / D) of the outer diameter (d) of the stirring blade to the inner diameter (D) of the container was d / D = 0.925. It was. As the stirring product, an aqueous syrup solution was used, and the viscosity (μ) of the used syrup solution was μ = 0.234 Pa · s, and its density (ρ) was ρ = 1320 kg / m ³ .

  As Example 1, with a container filled with 500 cc of an aqueous syrup solution, an anchor blade as a stirring blade is rotated at 35 rpm in a predetermined direction (for example, clockwise), and the turntable is rotated in a direction opposite to the predetermined direction (for example, counterclockwise) Direction) at 35 rpm. The experimental result of Example 1 is as shown in FIG. 6 (a). A small amount of an aqueous syrup solution having the same viscosity in which hypo was dissolved as a decolorizing agent was added to an aqueous syrup solution colored with iodine and stirred. About 60 seconds after the start of stirring, the syrup solution was stirred and mixed neatly, and the syrup solution became transparent. FIG. 6 (a) is a photograph of the stirring and mixing state at each elapsed time after the start of stirring. The black portion is an unmixed water tank aqueous solution, and the transparent portion is a water tank after mixing is completed. It is an aqueous solution.

  Further, as Example 2, the same stirrer as in Example 1 was used, and the agitated material and the filling amount thereof were also the same as in Example 1, and only the stirring conditions were different from Example 1. In Example 2, the stirring blade was rotated in a predetermined direction (for example, clockwise) at 50 rpm, and the rotating table was rotated in the direction opposite to the predetermined direction (for example, counterclockwise) at 20 rpm. The experimental result of Example 2 is as shown in FIG. 6 (b). In about 90 seconds after the start of stirring, the syrup solution was stirred and mixed neatly and became transparent.

  Next, as Comparative Examples 1 to 3, the same stirrer as in Example 1 was used, and the stirrer and the filling amount thereof were also the same as in Example 1. Only the stirring conditions were different from those in Example 1. In Comparative Example 1, the stirring blade is not rotated (the rotation speed is 0 rpm), and only the turntable is rotated at 70 rpm in the direction opposite to the predetermined direction (for example, counterclockwise). In Comparative Example 2, the stirring blade is Is rotated in a predetermined direction (for example, clockwise) at 20 rpm, the turntable is rotated in the opposite direction to the predetermined direction at 50 rpm, and in Comparative Example 3, only the stirring blade is rotated in the predetermined direction (for example, clockwise) at 70 rpm. The rotating table was not rotated (the rotation speed was 0 rpm).

  The experimental result of Comparative Example 1 is as shown in FIG. 7A. In about 300 seconds after the start of stirring, the syrup solution was stirred and mixed neatly and became transparent. The experimental result of Comparative Example 2 is as shown in FIG. 7B, and the aqueous syrup solution was neatly stirred and mixed about 300 seconds after the start of stirring, and became transparent. Moreover, the experimental result of the comparative example 3 is as showing in FIG.7 (c), The water tank aqueous solution was stirred and mixed neatly about 180 seconds after the stirring start, and it became a transparent state.

  The relationship with the stirring time of Examples 1 and 2 and Comparative Examples 1 to 3 is shown together in FIG. As is clear from FIG. 5, in Examples 1 and 2, the mixing time is shorter than in Comparative Examples 1 to 3, which means that the stirring blade and the rotating table (that is, the container 9 in which the stirring material is accommodated). Are rotated in opposite directions and the rotation speed of the stirring blades is made equal to or larger than the rotation speed of the turntable, so that the agitated material can be efficiently stirred to shorten the stirring time. When the rotation speed of the stirring blade is low, as can be understood from FIGS. It has been found that the stirring and mixing time becomes considerably long due to the occurrence of such a phenomenon.

2 Support body 4 Stirring mechanism 10 Stirrer 12 Motor (rotation drive means)
Reference Signs List 14 Stirring blade 16 Vertical drive means 18 Container 20 Turntable 22 Rotating shaft 24 Blade member 26 Rubber member 28 Support frame (Rotating shaft position changing means)
30 Vertical sliding member

Claims (5)

  A container for containing the agitated material to be agitated, an agitating blade for agitating the agitated material in the container, a rotation driving means for rotationally driving the agitating blade, and an up and down direction for moving the agitating blade up and down A stirrer, wherein the stirring blade is driven to rotate by the rotation driving unit and is moved up and down by the vertical driving unit.   A rotating table for placing the container; and a rotating table driving means for rotating the rotating table; and when the agitated material is stirred, the rotating table is rotated by the rotating table driving means. The stirrer according to claim 1.   A container for storing the agitated material to be agitated, a rotating table for placing the container, a rotating table driving means for rotationally driving the rotating shaft, and agitating for stirring the agitated material in the container And a rotation driving means for rotationally driving the stirring blade. When stirring the agitated material, the stirring blade is rotated in a predetermined direction by the rotation driving means, and the turntable is rotated. A stirrer which is rotationally driven in a direction opposite to the predetermined direction by a table driving means, and the number of rotations of the stirring blade is equal to or greater than the number of rotations of the rotating table.   The stirrer according to any one of claims 1 to 3, wherein the stirring blade is attached to a rotating shaft and provided with a rotating shaft position changing means for moving the rotating shaft in a horizontal direction.   The stirrer according to any one of claims 1 to 4, wherein an elastic body is provided in a portion of the stirring blade facing the inner peripheral surface of the container.

Images