JP2007260589A - Mixer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mixer which has a simple structure and is capable of uniformly agitating substances to be mixed. <P>SOLUTION: The mixer is provided with a case 1 into which substances to be mixed are fed, a rotary shaft 2 arranged in the case 1 so as to be capable of being rotated in a horizontal position, a drive mechanism 3 that rotates the rotary shaft 2, a circumferentially agitating member 4 being a helix of a metallic band iron and connected to the rotary shaft 2 through arms 5, and an inside agitating member 6 that is fixed on the rotary shaft 2 or the arms 5 and transfers the substances to be mixed in the direction opposite to that in the circumferentially agitating member 4 by the rotation of the rotary shaft 2. The inside agitating member 6 is composed of a plurality of agitating plates 7 arranged inwardly of the circumferentially agitating member 4, fixed in a position slanting to the rotary shaft 2, and transfers the substances to be mixed by the rotation of the rotary shaft 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a medium mixer for growing straw.

  As a culture medium for straw cultivation, a sawdust mixed with a nutrient is used. This medium is prepared by mixing sawdust and nutrients in a mixer and stirring. As shown in FIG. 1, the conventional mixer has a rotating shaft 22 provided horizontally in a case 21, and a helical stirring material 24 is fixed to the rotating shaft 22. The spiral stirrer 24 agitates the sawdust and the nutrient material to be mixed toward the center of the rotation shaft 22 by the rotation of the rotation shaft 22. This mixer cannot mix the sawdust and nutrients of the mixture on the right and left sides in the figure. This is because the mixture is separately stirred on both sides of the rotating shaft 22 as shown in FIG. For this reason, when adding nutrients to the sawdust and stirring using this mixer, it is necessary to uniformly supply the nutrients to the case supplying the sawdust from the opening of the case. If there is unevenness in the amount of nutrients added on the left side, the sawdust and nutrients cannot be mixed uniformly.

In order to eliminate such drawbacks, a mixer has been developed that transports the mixture to reciprocate in the axial direction of the rotating shaft. (See Patent Document 1)
JP 2001-129378 A

  As shown in FIG. 2, the mixer described in this publication includes a rotating drum 31 having a helical fin 34 fixed to the inner surface. The rotating drum 31 is placed on a wheel 33 and rotated. A rotating shaft 32 is provided horizontally at the center of the rotating drum 31. A spiral reverse transfer fin 35 that transfers the mixture in the opposite direction to the spiral fin 34 of the rotary drum 31 is fixed to the rotary shaft 32. This mixer transfers the material to be mixed in the opposite directions by the spiral fins 34 of the rotary drum 31 and the reverse transfer fins 35 of the rotary shaft 32. For this reason, it can stir uniformly, for example, conveying materials to be mixed such as sawdust and nutrients.

  However, the mixer having this structure has a drawback that the structure is complicated and the manufacturing cost is high. That is, the rotating drum is rotated by the wheel, and the spiral reverse transfer fin is fixed to the rotating shaft. Therefore, it takes time to manufacture these and the manufacturing cost increases.

  The present invention has been developed for the purpose of solving this drawback. An important object of the present invention is to provide a mixer capable of uniformly stirring a mixture with a simple structure.

In order to achieve the above-mentioned object, the mixer of the present invention has the following configuration.
The mixer includes a case 1 to which a material to be mixed is supplied, a rotating shaft 2 disposed in the case 1 so as to be rotated in a horizontal posture, a drive mechanism 3 for rotating the rotating shaft 2, and a rotating shaft. The outer peripheral stirrer 4 is formed by spiraling the metal band iron connected to the arm 2 via the arm 5, and is fixed to the rotary shaft 2 or the arm 5. And an inner stirring material 6 for transferring the mixture. The inner stirrer 6 is a plurality of stirrer plates 7 disposed inside the outer peripheral stirrer 4, and the plurality of stirrer plates 7 are fixed in a posture inclined with respect to the rotary shaft 2. The mixture is transferred by rotation.

  In the mixer of the present invention, the stirring plate 7 can be a metal plate of any of a semicircle, a semi-elliptical shape, and a semi-oval shape. Furthermore, this mixer can fix the central portion of the straight portion of the stirring plate 7 to the rotary shaft 2. Further, in the mixer of the present invention, the stirring plate 7 can be a metal plate of any of a semicircular shape, a semi-elliptical shape, and a semi-oval shape having a notch 14 at the center.

  Furthermore, the mixer according to claim 5 of the present invention includes a case 1 to which a material to be mixed is supplied, a rotating shaft 2 disposed in the case 1 so as to be rotated in a horizontal posture, and the rotating shaft 2. The rotating mechanism 2 is fixed to the drive mechanism 3 to rotate, the outer periphery stirring material 4 which makes the metal strip iron connected with the rotating shaft 2 via the several arms 5 spirally, and the arm 5 by rotation. The outer stirrer 4 and the inner stirrer 6 for transferring the mixture in the opposite direction are provided. The inner stirrer 6 is a plurality of stirrer plates 7 arranged inside the outer peripheral stirrer 4, and each stirrer plate 7 is fixed to each arm so as to be inclined with respect to the rotary shaft 2. The mixture is transferred by rotation of 2.

  The mixer of the present invention is characterized in that the mixture can be uniformly stirred while the overall structure is extremely simple. The mixer of the present invention is fixed so that the inner stirrer made up of a plurality of stirrer plates is inclined to the rotating shaft for rotating the outer peripheral stirring member or the arm connecting the outer peripheral stirring member to the rotating shaft. This is because the mixture can be uniformly mixed by transferring the mixture to the opposite side of the outer peripheral stirring material with the inner stirring material. In other words, the mixer according to the present invention realizes the characteristic that the mixture can be uniformly mixed with a simple structure in which a plurality of stirring plates are fixed to the conventional mixer having a simple structure shown in FIG. 1 in which the case is not rotated. To do. For this reason, when mixing and stirring a plurality of products to be mixed, such as sawdust and nutrients, for example, it is not necessary to uniformly supply the plurality of products to the case. The characteristic that all the materials to be mixed can be uniformly mixed and stirred is realized.

  Embodiments of the present invention will be described below with reference to the drawings. However, the Example shown below illustrates the mixer for actualizing the technical idea of this invention, and this invention does not specify a mixer as the following.

  Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  The mixer of the present invention is most suitable for the production of a culture medium for straw cultivation, but the present invention does not specify the use of the mixer for the production of a culture medium. The mixer of the present invention can be used, for example, for the production of materials for cultivating agricultural crops or for processing garbage.

  The mixing machine shown in FIGS. 3 to 5 includes a case 1 for supplying an object to be mixed, a rotating shaft 2 disposed in the case 1 so as to be able to rotate in a horizontal posture, and a drive for rotating the rotating shaft 2. The mechanism 3, the outer peripheral stirring material 4 connected to the rotating shaft 2 via the arm 5, and the rotating shaft 2 are fixed, and the mixture is transferred in the opposite direction to the outer peripheral stirring material 4 by the rotation of the rotating shaft 2. An inner stirring material 6.

  The case 1 has a box shape having a rectangular planar shape and opens upward. As shown in FIG. 4, the bottom plate 1A of the case 1 is curved in a semicylindrical shape. Furthermore, the case 1 is provided with a discharge port 8 for the agitated mixture at the left end of the bottom in FIG. The discharge port 8 opens from the end plate 1B of the case 1 to a position ubiquitous in the center. The discharge port 8 is preferably opened at a position 10 cm to 50 cm away from the end plate 1 </ b> B of the case 1. The discharge port 8 is closed by an opening / closing lid 9. The open / close lid 9 closes the discharge port 8 when stirring the mixture, opens the discharge port 8 when discharging the stirred mixture, and discharges the mixture from here.

  The rotating shaft 2 is connected to end plates 1B at both ends of the case 1 through a bearing 10 so as to be rotatable. The rotating shaft 2 is disposed at the center of the semi-cylindrical bottom plate 1 </ b> A of the case 1. This is because the outer peripheral stirring material 4 fixed to the rotating shaft 2 is moved closer to the bottom surface of the case 1.

  The rotating shaft 2 is connected to the drive mechanism 3 at a portion protruding from the end plate 1B. The drive mechanism 3 includes a motor 11 and a speed reducer 12. The motor 11 rotates the rotary shaft 2 via the speed reducer 12. The rotational speed at which the drive mechanism 3 rotates the rotary shaft 2 is set to an optimum value depending on the size of the mixer and the type of the mixture. For example, in a mixer that stirs sawdust and nutrients as a culture medium for straw cultivation, the rotational speed of the rotary shaft 2 is 3 to 10 rpm, preferably 5 to 8 rpm. The mixer which stirs the material for cultivating crops is 2 to 10 rpm. The mixer for garbage disposal rotates the rotating shaft 2 at a rotational speed of 1 to 5 rpm. Further, the garbage processing mixer continuously rotates the rotating shaft 2 or intermittently rotates the rotating shaft 2.

  The outer peripheral stirring material 4 is a metal band iron processed into a spiral shape, and is connected to the rotary shaft 2 via an arm 5. The outer peripheral stirring material 4 is close to the inner surface of the bottom plate 1A, and preferably has a spiral shape with a radius of preferably 5 mm or less from the inner surface of the bottom plate 1A. The outer peripheral stirring material 4 is obtained by processing a metal band iron having a width of 13 to 40 mm and a thickness of 9 to 16 mm, for example, into a spiral shape. The metal band iron is processed into a spiral shape and fixed to the rotating shaft 2 so that the wide surface faces the bottom plate 1A. However, the narrow surface can be processed into a spiral shape facing the bottom plate and fixed to the rotating shaft.

  The outer peripheral stirring material 4 is rotated by the rotating shaft 2 and moves the mixture to the discharge port 8. 3 and FIG. 5, the rotating shaft 2 is rotated in the direction indicated by the arrow A in the figure, and the mixture is moved toward the discharge port 8 in the direction indicated by the arrow B. Therefore, the outer peripheral stirring material 4 has a reverse pitch on the right and left sides of the discharge port 8 in FIG. 3, for example, the right side of the discharge port 8 is a spiral in the left-handed screw direction and the left side of the discharge port 8 is a spiral in the right-handed screw direction. Alternatively, the right side of the discharge port is spiraled in the right-hand screw direction and the left side of the discharge port is spiraled in the left-hand screw direction, and the mixture is rotated toward the rotary shaft 2 to transfer the mixture to the discharge port 8. .

  The arm 5 has one end connected to the rotating shaft 2 and the other end connected to the outer peripheral stirring material 4, and the outer peripheral stirring material 4 is connected to the rotating shaft 2. The arm 5 shown in the figure is a metal rod and is fixed to the rotating shaft 2 and the outer peripheral stirring material 4 by welding both ends. The illustrated rotating shaft 2 projects in the vertical direction and fixes a plurality of arms 5. The plurality of arms 5 are fixed radially to the rotating shaft 2 while shifting the connecting position with the rotating shaft 2 in the axial direction. Furthermore, the arm 5 in the figure has a metal plate 13 fixed to the side surface, and the metal plate 13 is also fixed to the rotary shaft 2. The metal plate 13 shown in the figure is a strip-shaped plate having a width that becomes slightly narrower toward the tip. The metal plate 13 is fixed by welding a side edge to the arm 5 and a rear end edge to the rotary shaft 2. However, the metal plate may be a polygon such as a rectangle or a triangle, or may be a sector. Thus, the metal plate 13 fixed to the arm 5 and the rotating shaft 2 has a feature that the connecting strength between the arm 5 and the rotating shaft 2 can be increased as a reinforcing rib. Although the metal plate 13 shown in the figure is fixed only to one side of the arm 5, the metal plate can be fixed to both sides of the arm.

  Further, the metal plate 13 fixed to the arm 5 and the rotating shaft 2 is rotated by the rotating shaft 2 and serves to stir the mixture in the case 1. This is because the metal plate 13 rotates while pressing the mixture in the case 1. In the illustrated mixer, the metal plate 13 is disposed in a plane including the axis of the arm 5 and the central axis of the rotary shaft 2, and is fixed to the arm 5 and the rotary shaft 2. As described above, the metal plate 13 disposed in the plane including the center of the rotating shaft 2 has a large action of scooping up the mixture in the direction indicated by the arrow D in FIG. There is a feature that can be stirred. However, the metal plate can also be arranged in a posture slightly inclined with respect to the rotation axis. This metal plate can move the mixture in the axial direction by adjusting the inclination angle with respect to the rotation axis. Furthermore, the metal plate can change the area and shape in various ways and can stir the mixture more efficiently.

  The inner stirring material 6 is a plurality of stirring plates 7 arranged inside the outer peripheral stirring material 4. The stirring plate 7 shown in the figure is obtained by cutting a metal plate into a semicircular shape, and a central portion of the linear portion is welded and fixed to the rotary shaft 2. The stirring plate 7 shown in the figure is provided with a semicircular cutout along the rotary shaft 2 at a portion fixed to the rotary shaft 2, and the rotary shaft 2 is inserted and fixed by welding. The stirring plate 7 shown in the figure has a straight portion fixed to the rotary shaft 2 and a part thereof is fixed to the arm 5 by welding. The arm 5 connects the outer peripheral stirring material 4 to the rotating shaft 2, and this structure can firmly fix the stirring plate 7 to the rotating shaft 2 via the arm 5.

  Further, as shown in FIGS. 6 and 7, the inner stirring member 6 can be fixed only to the arm 5 without fixing the stirring plate 7 to the rotating shaft 2. The stirring plate 7 shown in this figure is provided with a semicircular or semi-elliptical cutout 14 at the center, and the rotary shaft 2 is guided to the cutout 14. The inner shape of the notch 14 is larger than the outer shape of the rotating shaft 2, and the rotating shaft 2 guided by the notch 14 is in a state where a gap is formed around the rotating shaft 2 without contacting the stirring plate 7. The inner stirring material 6 having this structure does not directly fix the stirring plate 7 to the rotary shaft 2, and thus has an advantage that it can be smoothly transferred while reliably preventing the mixture to be adhered to these boundary portions.

  The inner stirring material 6 is rotated by the rotary shaft 2 and is inclined and fixed to the rotating shaft 2 or the arm 5 so that the outer peripheral stirring material 4 transfers the mixture in a direction opposite to the direction in which the mixture is transferred. The inner stirring material 6 transfers the mixture in the reverse direction inside the spiral outer peripheral stirring material 4. That is, in FIGS. 3 and 6, the outer peripheral stirring material 4 moves the mixture in the direction indicated by the arrow B, and the inner stirring material 6 transfers the mixture in the direction indicated by the arrow C. The inner stirring material 6 in the figure has an outer diameter of about 73% of the inner diameter of the outer peripheral stirring material 4. However, in the mixer of the present invention, the outer diameter of the inner stirring material 6, that is, the maximum outer diameter that is the distance from the rotary shaft 2 to the farthest position, is 50% to 80% of the inner diameter of the outer peripheral stirring material 4. Preferably, the content is 60% to 75%. Further, as shown in FIGS. 6 and 7, the inner stirring material 6 constituted by the stirring plate 7 having the notch portion 14 at the center portion is arranged outside the inner stirring material 6 according to the size of the notch portion 14. The transfer amount can be adjusted by increasing the diameter.

  In the illustrated mixer, the adjacent inner stirring material 6 is fixed to the opposite side of the rotating shaft 2. The plurality of inner stirring materials do not necessarily need to fix the adjacent inner stirring materials on the opposite side. For example, the inner stirring materials may be fixed to the rotating shaft so that the angle with the adjacent inner stirring materials is 45 degrees to 90 degrees. it can.

  The inner stirrer 6 in the figure is a semicircular metal plate, but the inner stirrer 6 is not necessarily required to have a semicircular metal plate. The inner stirring material 6 may be a polygon such as a rectangle or a triangle. Alternatively, a semi-elliptical shape or a semi-elliptical shape in which an ellipse or an oval is halved can be used.

  Further, the mixer shown in FIG. 8 includes an inner stirring material 6 disposed inside the outer peripheral stirring material 4 by a plurality of stirring plates 7 fixed to each arm 5. The stirring plate 7 in the figure has a shape obtained by cutting an elliptical metal plate in the minor axis direction. The stirring plate 7 has a short diameter portion welded to the rotating shaft 2 and fixed, and a portion along the long diameter is fixed to the arm 5 by welding. Thus, the stirring plate 7 fixed to the rotating shaft 2 and the arm 5 has a feature that the connecting strength between the rotating shaft 2 and the arm 5 can be increased as a reinforcing rib.

  The inner stirring material 6 is rotated by the rotary shaft 2, and the stirring plate 7 is inclined so that the outer peripheral stirring material 4 transfers the mixture in the direction opposite to the direction in which the mixture is transferred. It is fixed. This inner stirring material 6 also transfers the mixture in the reverse direction inside the spiral outer peripheral stirring material 4. That is, in the mixer shown in FIG. 8, when the rotating shaft 2 is rotated in the direction indicated by the arrow A in the figure, the outer peripheral stirring material 4 transfers the mixture in the direction indicated by the arrow B, and the inner stirring material 6 is covered. The mixture is transferred in the direction indicated by arrow C.

  The above inner stirring material 6 can adjust the amount of the mixture to be mixed by changing the shape and area of the stirring plate 7 in various ways. For example, the stirring plate may have a shape obtained by cutting a circle or an oval, or a polygon such as a rectangle, a triangle, or a trapezoid. Further, the stirring plate can be increased in area to increase the amount of transfer, and conversely, the area can be decreased to reduce the amount of transfer. Furthermore, the stirring plate can adjust the transfer amount of the mixture by changing the inclination angle with respect to the rotation axis.

  In the inner stirring material 6 shown in FIG. 8, the stirring plate 7 is welded and fixed to both the rotating shaft 2 and the arm 5, but the stirring plate can be fixed only to the arm. This stirring plate has the feature that it can be fixed at a position away from the rotating shaft without being directly fixed to the rotating shaft, and the mixture can be reliably prevented from adhering to these boundary portions.

  Furthermore, the inner stirring member 6 shown in FIG. 8 has one stirring plate 7 fixed to one arm 5, but the inner stirring member has a plurality of stirring plates fixed to one arm. You can also. For example, the stirring plate can be fixed to both sides of the arm, or the stirring plate can be fixed to a position approaching the rotation shaft and a position away from the rotation shaft. The plurality of agitation plates fixed to one arm can adjust the transfer amount of the inner agitation material by variously changing the shape, area, and inclination angle.

It is a top view of the conventional mixer. It is sectional drawing of the other conventional mixer. It is a vertical longitudinal cross-sectional view of the mixer concerning one Example of this invention. FIG. 4 is a vertical cross-sectional view of the mixer shown in FIG. 3. It is a perspective view which shows the inside of the mixer shown in FIG. It is a vertical longitudinal cross-sectional view of the mixer concerning the other Example of this invention. It is a vertical cross-sectional view of the mixer shown in FIG. It is a perspective view which shows the inside of the mixer concerning the other Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Case 1A ... Bottom plate 1B ... End plate 2 ... Rotating shaft 3 ... Drive mechanism 4 ... Outer periphery stirring material 5 ... Arm 6 ... Inner stirring material 7 ... Stirring plate 8 ... Discharge port 9 ... Opening / closing lid 10 ... Bearing 11 ... Motor 12 ... Reducer 13 ... Metal plate 14 ... Notch 21 ... Case 22 ... Rotating shaft 24 ... Stirring material 31 ... Rotating drum 32 ... Rotating shaft 33 ... Wheel 34 ... Spiral fin 35 ... Reverse transfer fin

Claims (5)

  A case (1) to which the mixture is supplied, a rotating shaft (2) disposed so as to be able to rotate in a horizontal posture in the case (1), and a drive mechanism for rotating the rotating shaft (2) ( 3), a metal stirrer connected to the rotating shaft (2) via the arm (5), and the outer peripheral stirrer (4) spirally fixed to the rotating shaft (2) or arm (5) A mixer comprising an inner stirrer (6) for transferring the mixture in the opposite direction to the outer peripheral stirrer (4) by rotation of the rotating shaft (2), wherein the inner stirrer (6) With a plurality of stirring plates (7) arranged inside the stirring material (4), the plurality of stirring plates (7) are fixed in a posture inclined with respect to the rotating shaft (2), and the rotating shaft ( A mixer characterized in that the mixture is transferred by the rotation of 2).   The mixer according to claim 1, wherein the stirring plate (7) is a metal plate of any one of a semicircular shape, a semi-elliptical shape and a semi-elliptical shape.   The mixer according to claim 2, wherein a central portion of the straight portion of the stirring plate (7) is fixed to the rotating shaft (2).   The mixer according to claim 2, wherein the stirring plate (7) is a metal plate of a semicircular shape, a semi-elliptical shape, or a semi-elliptical shape having a notch (7A) at the center. A case (1) to which the mixture is supplied, a rotating shaft (2) disposed so as to be able to rotate in a horizontal posture in the case (1), and a drive mechanism for rotating the rotating shaft (2) ( 3), an outer peripheral stirrer (4) formed by spiraling a metal strip connected to the rotating shaft (2) via a plurality of arms (5), and the arm (5) A mixer comprising an inner stirring material (6) for transferring the mixture in the opposite direction to the outer peripheral stirring material (4) by rotation of the shaft (2),
The inner stirrer (6) is a plurality of stirrer plates (7) arranged inside the outer peripheral stirrer (4), and each stirrer plate (7) is inclined with respect to the rotating shaft (2). The mixer is fixed to each arm (5), and the mixture is transferred by rotation of the rotating shaft (2).

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