Vertical two-axis mixer and its usage method

Abstract

Provided is a vertical twin-shaft mixer that can widely and effectively perform not only general stirring and mixing of foods, cosmetics, and other materials to be processed, but also various processes such as cutting, grinding, emulsification, and kneading. 【Solution means】The rotational diameter d1 of the first agitator P1 on the first eccentric stirring shaft 51 is set to be larger than the radius r of the material storage cylindrical pot T, and the first eccentric stirring shaft 51 is rotated in the same direction F as the direction F in which the first eccentric stirring shaft 51 revolves by the first drive source, so that the first agitator draws a movement locus of an epicycloid curve. On the other hand, the rotational diameter d2 of the second agitator P2 on the second eccentric stirring shaft 52 is set to be smaller than that of the first agitator, and the second drive source 47 separately and independently attached to the second eccentric stirring shaft 52 rotates the second agitator at a higher speed than the first agitator in the same direction F or the reverse direction R as the first agitator, so that the second agitator draws a movement locus of an epicycloid curve or a hypocycloid curve.

Description

Technical Field

[0001] The present invention relates to a vertical two - shaft mixer for industrial use and its usage method, which is designed to effectively perform not only general whipping, stirring, and mixing of foods, chemicals, cosmetics, industrial materials, and other materials to be processed, but also various processes such as emulsification, dispersion, cutting, pulverization, and kneading.

Background Art

[0002] The patent applicant of the present invention has commercialized the patented inventions described in Patent Documents 1 and 2 for vertical two - shaft mixers for food ingredients. In particular, in the production of meringue, fresh cream, sponge dough, etc. by whipping egg white using a wire whip as a stirrer, remarkable results have been achieved. However, it has been found that there are still the following problems to be improved.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] That is, taking Patent Document 1 as a representative example, in the configuration of the vertical mixer, the first pinion gear (planet gear) (74) at the upper end of the first eccentric stirring shaft (61) meshes with the large - diameter internal gear (fixed sun gear) (68) on the gear - supporting ceiling plate (66) in a fixed installation state, and the second pinion gear (planet gear) (77) at the upper end of the second eccentric stirring shaft (62) meshes and rotates via the fixed internal gear (68) and the idle gear (intermediate gear) (75).

[0005] Therefore, according to the description of the illustrated embodiment for the barrel pot (T) with a diameter (inner diameter) of about φ400 mm, the spacing distance (D2) between the center spindle (60) and the second eccentric stirring shaft (62) is long, for example, about 115 mm, and similarly, the spacing distance (D1) between the center spindle (60) and the first eccentric stirring shaft (61) is short, for example, 83.75 mm. Due to the excessive length difference (about 31.25 mm), the second agitator (P2) on the second eccentric stirring shaft (62) approaches the barrel wall surface of the barrel pot (T). As a result, it becomes necessary to use a second agitator (P2) with a rotation diameter (d2) that is necessarily smaller than the radius dimension (r) of the barrel pot (T). Consequently, it is impossible to effectively stir the food ingredients without leakage to the center of the barrel pot (T).

[0006] Since the main stirring action of the food ingredients is borne by the first agitator (P1) with a large rotation diameter (d1), and the second agitator (P2) with a small rotation diameter (d2) only serves as an auxiliary, the first and second agitators (P1) and (P2) attached and used in a combined state on the two shafts of the first and second eccentric stirring shafts (61) and (62) are also greatly restricted in terms of their types, the food ingredients that can be used, and the types (uses) of their actions. Such problems are considered to occur similarly even if a fixed external gear is adopted instead of the above fixed internal gear (68), as long as an idler gear (intermediate gear) (75) is interposed between the center spindle (60) and the second pinion gear (77) on the second eccentric stirring shaft (62).

[0007] In addition, the planetary gear mechanism having the fixed internal gear (68) and the idle gear (75) causes the first agitator (P1) on the first eccentric stirring shaft (61) to draw an autorotation locus of a hypocycloid curve, while the second agitator (P2) on the second eccentric stirring shaft (62) draws an autorotation locus of an epicycloid curve. Therefore, even if both the first and second agitators (P1) and (P2) are wire whippers as shown in FIGS. 20 and 21 and are beneficial for the foaming action of the egg white (food material), combined with the fact that the rotation gear ratio of the planetary gear mechanism is fixed in advance, it cannot be applied to operations such as emulsification, cutting, and pulverization that require the agitator to rotate at a high speed of, for example, 1000 rpm or more.

[0008] In this regard, if it is desired to obtain high-speed rotation of the first and second agitators (P1) and (P2) in the vertical mixer of Patent Document 1, it is necessary to rotate the geared motor (48), which is the rotation drive source of the center main shaft (60), at a high speed. Then, a contact type temperature sensor (103) for the food material hanging down from the center main shaft (60) or the rotating bowl (70), a scraper for scraping the food material adhering to the barrel wall surface of the barrel-shaped pot (T), etc. will revolve at a high speed, causing problems.

[0009] Furthermore, in the above vertical mixer, regarding the physical structure of the stirring mechanism (A), in addition to the idle gear (75), the idle gear shaft (76), and the radial bearing (78) interposed therebetween, a large-diameter fixed internal gear (68) is also required. In order to suppress the second agitator (P2) from approaching and shifting toward the barrel wall surface of the barrel-shaped pot (T) even slightly, the second eccentric stirring shaft (62) and the second bearing case (70d) are made smaller in diameter than the first eccentric stirring shaft (61) and the first bearing case (70c). Therefore, there is also an increase in the number of parts due to the difference in thickness, resulting in a significantly complicated and special configuration, leading to high manufacturing costs and deteriorated maintainability.

Means for Solving the Problem

[0010] The present invention aims to solve such various problems. To achieve this object, in claim 1, there is a cylindrical pot with a substantially flat bottom for accommodating the material to be processed,

[0011] a heating action box with a built-in heat source facing directly below the cylindrical pot,

[0012] a stirring action box fixedly supported by a column of the mixer body frame so as to face directly above the cylindrical pot,

[0013] a center main shaft hanging down from the stirring action box toward the center of the cylindrical pot,

[0014] a first drive source for rotating the center main shaft built into the stirring action box,

[0015] a rotating gear case integrally rotated with the center main shaft by the first drive source,

[0016] a first and a second eccentric stirring shaft hanging down from the rotating gear case in a parallel state with the center main shaft toward the eccentric part in the cylindrical pot and each being supported by a bearing so as to be able to rotate on its own with respect to the rotating gear case,

[0017] the distance between the first eccentric stirring shaft and the center main shaft is set to be a short dimension, and a first stirrer is connected to the lower end of the first eccentric stirring shaft so as to be integrally rotatable, while than the distance between the second eccentric stirring shaft and the center main shaft, similarly

[0018] similarly, the distance between the second eccentric stirring shaft and the center main shaft is set to be a long dimension, and a second stirrer is connected to the lower end of the second eccentric stirring shaft so as to be integrally rotatable, than the distance between the first eccentric stirring shaft and the center main shaft

[0019] when the center main shaft is rotationally driven by the first drive source, the first and second eccentric stirring shafts revolve around the center main shaft in the same direction through the rotating gear case integrally rotated with the center main shaft. At the same time,

[0020] ​​In a vertical two-shaft mixer in which a first agitator on the first eccentric stirring shaft and a second agitator on the second eccentric stirring shaft rotate independently without their rotational movement trajectories interfering with each other,

[0021] The rotation diameter of the first agitator is set to a dimension larger than the radius of the barrel-shaped pot, and the first eccentric stirring shaft is rotated in the same direction as the direction of its revolution by the first drive source, so that the first agitator describes a movement trajectory of an epicycloid curve. On the other hand,

[0022] The rotation diameter of the second agitator is also set to a dimension smaller than the radius of the barrel-shaped pot or a dimension larger than the radius of the barrel-shaped pot but smaller than the rotation diameter of the first agitator. A dedicated second drive source independently attached to the upper end of the second eccentric stirring shaft rotates the second agitator at a higher speed than the first agitator in the same direction as or in the opposite direction to the first agitator, and the relationship is set so that the second agitator describes a movement trajectory of an epicycloid curve or a hypocycloid curve.

[0023] In claim 2, a gear case that rotates integrally with the center spindle is attached to the lower end of the center spindle exposed from the fixed bearing case that rotatably supports the center spindle. The first and second eccentric stirring shafts are each supported by the rotating gear case so as to be able to rotate, and

[0024] A planetary gear fitted and integrated on the upper end of the first eccentric stirring shaft is meshed with a fixed sun gear fitted and integrated at a corresponding height position of the fixed bearing case in an externally meshing state, while

[0025] An AC geared motor serving as a first drive source for rotating the center spindle and a DC brushless motor or an AC geared motor serving as a dedicated second drive source for the second eccentric stirring shaft are connected and integrated to the upper end of the second eccentric stirring shaft.

[0026] In claim 3, the center spindle is hollow, and a hollow slip ring is attached and integrated to the upper end thereof, and

[0027] The power supply line connected to the second drive source for rotating the second eccentric stirring shaft is passed through and wired inside the hollow of the center main shaft and the slip ring.

[0028] In claim 4, in order to maintain the weight balance around the center main shaft of the second eccentric stirring shaft integrally connected to the upper end of the second drive source, not only the planetary gear with a smaller diameter than the fixed sun gear is fixed to the upper end of the first eccentric stirring shaft, but also a balance weight is attached from above the planetary gear.

[0029] In claim 5, the rotational speed at which the first eccentric stirring shaft rotates in the same direction as the direction of its revolution motion through the center main shaft and the rotary gear case by the AC geared motor serving as the first drive source for rotating the center main shaft to rotate is defined to be changeable and adjustable by the inverter for rotation control.

[0030] In claim 6, the rotational speed at which the second eccentric stirring shaft rotates in the same direction or the reverse direction as the direction of its revolution motion by the DC brushless motor or the AC geared motor serving as the second drive source for rotating the second eccentric stirring shaft to rotate is defined to be changeable and adjustable by the motor driver for rotation control.

[0031] In claim 7, a scraper that scrapes the material to be processed in contact with the barrel wall surface of the cylinder pot from the eccentric part of the rotary gear case that revolves integrally with the center main shaft toward the inside of the cylinder pot, and a contact type temperature sensor for the material to be processed, which is the temperature sensing part of the wireless transmitter, are each suspended, and

[0032] the wireless receiver corresponding to the wireless transmitter is built-in and installed in the stirring action box.

[0033] In claim 8, the back wall plate is integrally suspended from the rear end of the pot support arm that suspends the cylinder pot at the middle height position of the support column, and

[0034] A lifting slider capable of lifting along a pair of lifting guide shafts erected parallel to the above-mentioned support column is integrally projected rearward from the back wall plate of the above-mentioned pot receiving arm,

[0035] A nut attached and integrated to the horizontal bearing plate of the lifting slider is screwed and fastened to a rotating screw shaft erected between the above-mentioned two lifting guide shafts,

[0036] It is characterized in that when the rotating screw shaft is rotated by a lifting operation gear motor from above, the lifting slider on the pot receiving arm side is determined to perform only a lifting motion along the lifting guide shaft.

[0037] In claim 9, in addition to the first proximity switch for detecting the upper limit position of the lifting slider and the second proximity switch for detecting the lower limit position, a third proximity switch for detecting a fixed position is also provided,

[0038] It is characterized in that the mixer is set not to operate unless both detection signals of the first proximity switch and the third proximity switch are output.

[0039] Claim 10 is a method of using the vertical two-axis mixer described in claim 1, in which a first stirrer with a rotation diameter larger than the radius of the cylindrical pot is used as a bottom blade for preventing burning due to heating of the material to be processed,

[0040] A second stirrer, which is also larger than the radius of the cylindrical pot but smaller than the rotation diameter of the first stirrer, is used as a shear cutter or a concave-convex tooth-shaped rotor for the material to be processed,

[0041] The first and second stirrers are kept in an overlapping state where they are stacked or meshed by a certain amount near the vertical center line of the cylindrical pot,

[0042] Moreover, during the revolution of the first and second stirrers by the first drive source of the first stirrer, the second stirrer is rotated by a second drive source independent of the first drive source in the same direction as or in the opposite direction to the first stirrer and at a higher speed than the first stirrer, thereby promoting stirring, pulverization, and emulsification based on shearing of the material to be processed.

Advantages of the Invention

[0043] According to the above configuration of claim 1, all the problems of the vertical two-shaft mixer described in the above-mentioned Patent Document 1 can be solved, and there is an effect of obtaining a multifunctional vertical two-shaft mixer.

[0044] That is, different from the vertical two-shaft mixer described in Patent Document 1, as suggested by the first to seventh usage examples, the combined use of different forms of the first and second stirrers on the first and second eccentric stirring shafts, the overlapping state in which a certain amount is stacked or engaged near the center of the barrel pot, and the large speed difference in the rotational motion of the first and second stirrers act organically as a whole, so that not only whipping, stirring, and mixing of general food ingredients are possible, but also cutting, pulverization, kneading, emulsification, and other various processes of various materials to be processed can be widely performed.

[0045] In particular, if the configuration of claim 2 is adopted, the stirring mechanism of the vertical two-shaft mixer can be simplified to the minimum necessary physical structure, and it is excellent in mass production effect and maintainability.

[0046] If the configuration of claim 3 is adopted, there is an effect that the power supply line connected to the second drive source for rotating (self-rotating) the second eccentric stirring shaft can be smoothly and stably wired through the hollow interior of the center spindle and the slip ring.

[0047] If the configuration of claim 4 is adopted, a pair of the first and second eccentric stirring shafts in the stirring mechanism can be maintained in a well-balanced state with good weight balance with respect to the vertical center line of the center spindle, and there is an effect of obtaining the installation stability and durability of the stirring mechanism.

[0048] If the configuration of claim 5 is adopted, the rotation (revolution) speed of the center spindle by the first drive source and thus the rotation (rotation) speed of the first eccentric stirring shaft via the planetary gear mechanism can be changed and adjusted by the inverter for rotation control. On the other hand, if the configuration of claim 6 is adopted, the rotation (rotation) speed of the second eccentric stirring shaft by the second drive source can be changed and adjusted by the motor driver for rotation control. Therefore, both of them are useful for performing various processes on the material to be processed.

[0049] Also, if the configuration of claim 7 is adopted, when performing the necessary processing on the material to be processed while heating the cylindrical pot, the material adhering to the barrel wall surface of the cylindrical pot can be effectively scraped off by the scraper that revolves. In addition, the heating temperature of the material to be processed can be automatically measured (detected) in real time by the temperature sensing part (contact type temperature sensor) of the wireless transmitter that also revolves. When the preset target set temperature is reached, this is transmitted from the wireless transmitter to the wireless receiver in the stirring action box, and based on the detection output signal of the receiver, it is also possible to stop the heating of the heat source. Therefore, it is also useful for the automatic operation of the mixer.

[0050] If the configuration of claim 8 is adopted, when the rotating screw shaft is rotated by the lifting and lowering geared motor from above, the lifting and lowering slider on the pot receiving arm side only moves up and down along the lifting and lowering guide shaft, and the heating action box attached and fixed to the back wall plate on the pot receiving arm side also moves up and down together. As a result, the cylindrical pot supported and suspended by the pot receiving arm and the heat source installed inside the heating action box always maintain a constant and accurate positional relationship and move up and down together with respect to the first and second agitators facing from above, enabling a stable heating action without excess or deficiency.

[0051] In that case, if the configuration of claim 9 is adopted, when the first proximity switch detects the upper limit position of the lifting slider, the third proximity switch also detects a predetermined fixed position of the lifting slider at the same time. Unless both detection signals are output, it is considered that the barrel pot is in a dangerous state where it has not yet been set in the correct fixed position for the necessary processing of the material to be processed, and the mixer is designed not to operate, which is useful for safety.

[0052] Furthermore, according to the configuration of claim 10, while heating the material to be processed without the risk of burning, a shearing force due to the high-speed rotation (rotation) of the second agitator is applied to the material, which has the effect of promoting stirring, pulverization, and emulsification with high efficiency.

Brief Description of the Drawings

[0053]

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MODE FOR CARRYING OUT THE INVENTION

[0054] Hereinafter, when a preferred embodiment of the present invention is described in detail with reference to the drawings, FIG. 1 shows an overall schematic of a vertical two-shaft mixer according to the embodiment, which includes a rigid mixer body frame (M) installed on a work floor, and a substantially flat-bottomed barrel pot (T) for storing a material to be processed, which is stably suspended at a mid-height position of a column (1) in the mixer body frame (M). A stirring action box (Ab) fixedly supported by the column (1) of the mixer body frame (M) so as to face directly above the barrel pot (T), a center spindle (2) of a stirring mechanism (A) suspended from the stirring action box (Ab) toward the center of the barrel pot (T), a first drive source (3) for rotating the center spindle installed inside the stirring action box (Ab), a heating action box (Hb) having a heating source (H) facing directly below the barrel pot (T), and a lifting operation mechanism (L) for lifting and lowering the barrel pot (T) and the heating action box (Hb) together with respect to the stirring mechanism (A).

[0055] Among the main components of the above vertical two-shaft mixer, first, the cylindrical pot (T) for storing food, chemical products, cosmetics, industrial materials, and other materials to be processed is made of a three-layer clad material of stainless steel and aluminum (for example, inner layer: SUS304, middle layer: aluminum, outer layer: SUS430) for industrial use with a certain size (for example, diameter / inner diameter: φ500 mm, depth: 320 mm, capacity: 60 liters).

[0056] However, if the cylindrical pot (T) has conductivity, it may be made of a clad material of aluminum and iron, ferritic stainless steel, copper sprayed with magnetic iron powder, or iron itself which is a magnetic material. Also included in the above cylindrical pot (T) is a ball pot whose central part of the bottom surface does not have a conical convex protruding inward.

[0057] (4) is a ring-shaped locking flange welded at the mid-height position of the barrel wall surface in the above cylindrical pot (T), and is provided with a pair of left and right ear pieces (5) protruding integrally outward from its diameter line. Mounting holes (6) opening in both ear pieces (5) are inserted and set in a vertically standing pair of centering guide pins extending from a pot support arm described later on the mixer body frame (M) side so as to be freely inserted and removed from above.

[0058] (7) is a pair of left and right handles corresponding to directly above both ear pieces (5) protruding from the above locking flange (4). Since it is integrally protruding outward from the barrel wall surface of the above cylindrical pot (T) in a U-shaped form facing each other in plan view, an operator can hold this with both hands and perform an insertion and removal operation of the above mounting hole (6) on the cylindrical pot (T) side to centering guide pins on the pot support arm side described later, or carry the cylindrical pot (T).

[0059] Next, the mixer body frame (M) includes, in addition to a rigid support column (1) made of channel steel open rearward in plan view, a leg frame (8) welded in a pseudo-H shape in plan view from steel pipe materials. The middle part of the leg frame (8) is welded in an assembled state passing through and crossing the lower end of the support column (1). (9) is a mounting height adjustment seat screwed and fastened to a plurality of locations where the leg frame (8) contacts the ground.

[0060] Regarding the lifting mechanism (L) for lifting the above-mentioned barrel pot (T) and its heating action box (Hb) together, (10) is a pot receiving arm that receives and suspends the locking flange (4) of the barrel pot (T). It has a substantially U-shaped or horseshoe-shaped opening forward in a plan view as shown in FIGS. 1, 5 to 7. A pair of left and right centering guide pins (11) that vertically stand integrally from near the front end thereof are inserted and set into the mounting holes (6) on the barrel pot (T) side from above in a freely detachable manner. In this way, the barrel pot (T) is fixed and maintained in an accurate centering state (positioning state) automatically due to its corresponding positional relationship with the stirring mechanism (A) and the heat source (H).

[0061] On the other hand, (12) is a back wall plate integrally suspended from the rear end of the above-mentioned pot receiving arm (10). It is parallel to the column (1) of the mixer body frame (M). From the back wall plate (12), a pair of left and right lifting support plates (13) that maintain a constant interval wider than the column (1) project rearward. (14) is a mounting and fixing bolt for the lifting support plate (13) to the back wall plate (12).

[0062] (15) is a lifting slider attached to the projecting tip portions (rear end portions) of both lifting support plates (13) from the left and right lateral directions by a plurality of fixing bolts (16) so as to surround the open rear surface of the above-mentioned column (1). It is provided with a pair of upper and lower horizontal bearing plates (17) that will be interposed inside the column (1). A nut (18) forming a ball screw mechanism is integrally attached to the lower bearing plate (17) from below.

[0063] Further, (19) is a rotating screw shaft forming a ball screw mechanism, and (20) is a pair of left and right lifting guide shafts arranged in parallel adjacent to the side of the rotating screw shaft (19). Both of the lifting guide shafts (20) and the rotating screw shaft (19) are vertically erected parallel to the column (1). The rotating screw shaft (19) is in a screwed and fastened state with the nut (18) on the side of the lifting slider (15). Moreover, the rotating screw shaft (19) and both lifting guide shafts (20) completely penetrate through the bearing plate (17) of the lifting slider (15).

[0064] (21) is a pair of upper and lower lifting unit bases fixed to the column (1) of the mixer body frame (M) by a plurality of bolts (22). The upper and lower ends of both lifting guide shafts (20) are respectively attached and fixed to the lifting unit base (21). On the other hand, the upper and lower ends of the rotating screw shaft (19) are also rotatably supported on the lifting unit base (21) via ball bearings (23) respectively. (24) is the bearing case thereof.

[0065] Furthermore, a geared motor (26) with a brake, which is the lifting operation source of the lifting slider (15), is connected to the upper end of the rotating screw shaft (19) via a coupling (25). When the rotating screw shaft (19) is rotated by the geared motor (26), the lifting slider (15) only performs a lifting action along the pair of left and right lifting guide shafts (20) through the nut (18) in a screwed and fastened state with it. Subsequently, the cylindrical pot (T) received and suspended by the pot receiving arm (10) will lift as shown in FIGS. 8 and 9. (27) is a safety cover that entirely covers the lifting operation mechanism (L).

[0066] In that case, first to third proximity switches (29a), (29b), and (29c) are attached to a switch support bracket (28) vertically installed parallel to the column (1) and the lifting guide shaft (20) in the mixer body frame (M). On the other hand, a pair of upper and lower position detection pins (30a) and (30b) detected by the proximity switches (29a), (29b), and (29c) protrude backward from the lifting slider (15).

[0067] Then, as suggested by FIGS. 1 and 6, the first and second proximity switches (29a) and (29b) detect the upper limit position and the lower limit position of the lifting slider (15), respectively, and the third proximity switch (29c) also detects the fixed position of the lifting slider (15). When the first proximity switch (29a) detects the upper position detection pin (30a) on the lifting slider (15), the third proximity switch (29c) simultaneously detects the lower position detection pin (30b) on the lifting slider (15). Unless both detection signals are output, it is considered that the barrel pot (T) is in a dangerous state where it is not set in the correct fixed position for stirring the material to be processed, and the mixer is set not to operate (run). Even if the stirring switch or the heating switch on the operation panel (not shown) is turned on, it will not operate.

[0068] The heating action box (Hb) is assembled in a disk shape corresponding to the size of the barrel pot (T) as shown in FIGS. 1 and 6. Since the mounting stay (31) that projects backward integrally from the barrel wall surface is attached to the back wall plate (12) of the pot receiving arm (10) by a plurality of fixing bolts (32), it moves up and down together with the barrel pot (T).

[0069] In the illustrated embodiment, the heat source (H) is an electromagnetic induction heater. One electromagnetic induction heating coil (33) is fixedly installed in a spiral state on the upper surface of its flat coil receiving base (34), and its connection terminals are electrically wired to the heating inverter (high-frequency power supply) (35) in the stirring action box (Ab).

[0070] And since the coil receiver base (34) is detachably attached to the bottom surface of the heating action box (Hb) by a plurality of its leg posts (36) and fixing bolts (37), an electromagnetic induction heater can be taken in and out from below the box (Hb). (38) is a blower fan installed on the bottom surface of the heating action box (Hb). However, as the heating source (H) of the above-mentioned measuring cylinder pot (T), an infrared heater or other electric heater replacing the electromagnetic induction heater may be adopted. In addition, not only electric heaters but also heaters such as gas burners and steam jackets can be adopted.

[0071] Next, the agitation action box (Ab) will be described. This is shaped like an inverted L in side view as shown in FIGS. 1 and 4. On the horizontal motor mounting base (40) fixedly horizontally mounted in the upper space of its upper bottom plate (39), an AC geared motor for rotating the center main shaft forming the first drive source (main drive source) (3) of the agitation mechanism (A) is attached and fixed so as to be adjustable in forward and backward movement in the front-rear direction. (41) is the screw rod for the forward and backward adjustment.

[0072] (42) is a drive sprocket fitted to the motor output shaft (43), (44) is a support mast vertically provided from the above-mentioned motor mounting base (40), and at its upper end, a wireless receiver (45) corresponding to a wireless transmitter described later, an inverter (46) for controlling the rotation of the first drive source (AC geared motor) (3), and a motor driver (48) for controlling the rotation of the second drive source (sub-drive source) (47) described later are mounted.

[0073] In addition, (49) is a fixed partition wall plate vertically provided inside the agitation action box (Ab), and behind it, an inverter (high-frequency power supply) (35) for heating the electromagnetic induction coil (33) and various electrical components (not shown) are built and installed. (50) is a fixing nut for plugging the lower end of the center main shaft (2). The operation panel attached to the front (front surface) of the above-mentioned agitation action box (Ab) is not shown.

[0074] The stirring mechanism (A) includes a center main shaft (2) that is rotationally driven by the AC geared motor of the first drive source (main drive source) (3), and first and second eccentric stirring shafts (51) and (52) that revolve around the center main shaft (2) in the same direction (F). At the lower ends of both eccentric stirring shafts (51) and (52), various first and second stirrers (P1) and (P2) described later are connected and used so as to be detachable and rotatable integrally.

[0075] That is, as is clear from FIGS. 2 and 4 showing an enlarged view of the stirring mechanism (A), the center main shaft (2) is in a vertical state passing through the horizontal motor mounting base (40) as a hollow shaft, and is rotatably supported by a fixed bearing case (53) and a ball bearing (54) flange-bonded to the motor mounting base (40). (55) is a pair of upper and lower oil-less metals inserted into the fitting surface between the hollow center main shaft (2) and its fixed bearing case (53).

[0076] Also, at an intermediate height position above the motor mounting base (40) on the center main shaft (2), a driven sprocket (56) is fitted and integrated in parallel with the drive sprocket (42) of the first drive source (AC geared motor) (3). The center main shaft (2) is rotationally driven by the first drive source (AC geared motor) (3) via an endless transmission chain (57) wound between them. The rotation (revolution) speed is 4.5 to 19 rpm as an example of the illustrated embodiment.

[0077] In that case, a hollow slip ring (rotary connector) (58) is attached and integrated to the upper end of the hollow center main shaft (2). On the other hand, a gear case (59) having a circular or rectangular shape in plan view is flange-bonded to the lower end of the center main shaft (2) exposed from the fixed bearing case (53) so as to be rotatable integrally. In addition, a fixed sun gear (60) is fitted and integrated to the lower end of the fixed bearing case (53). The fixed sun gear (60) is composed of a spur gear having a slightly larger diameter than the outer diameter dimension of the fixed bearing case (53).

[0078] As shown in FIGS. 2 and 4, the first and second eccentric stirring shafts (51) and (52) are suspended from a rotating gear case (59) that rotates integrally with the center main shaft (2) in a state parallel to the center main shaft (2) toward the eccentric portions within the barrel pot (T), and are each supported by ball bearings (63) within first and second bearing cases (61) and (62) that are attached to and integrated with the rotating gear case (59) so as to be capable of rotating. The diameters (thicknesses) of the first and second eccentric stirring shafts (51) and (52) are the same as each other, and the diameters (thicknesses) of the first and second bearing cases (61) and (62) are also the same as each other.

[0079] Moreover, among the two parallel shafts, while one of the first eccentric stirring shafts (51) maintains a relatively short (close) spacing distance (axial distance) (D1) from the center main shaft (2), the other second eccentric stirring shaft (52) is relationally set to maintain a relatively long (distant) spacing distance (axial distance) (D2) from the center main shaft (2) as well.

[0080] In the case of the illustrated embodiment, for a barrel pot (T) with an inner diameter of φ500 mm, the spacing distance (D1) of the first eccentric stirring shaft (51) is dimensioned to be 87 mm, and the spacing distance (D2) of the second eccentric stirring shaft (52) is dimensioned to be 105 mm, and the difference in their lengths (difference in distances) is 18 mm. The former 87 mm corresponds to a ratio of 0.174 when the inner diameter dimension of the barrel pot (T) is taken as a ratio of 1, and the latter 105 mm corresponds to a dimension with a ratio of 0.21 as well, but these ratio values are a preferred example that can be applied as the maximum for barrel pots (T) with different inner diameters as well.

[0081] Therefore, for example, in the case of a cylindrical pot (T) with a diameter (inner diameter) of φ600 mm, it is preferable that the short spacing distance (D1) of the first eccentric stirring shaft (51) is 104.4 mm (600 mm × 0.174) or less, the long spacing distance (D2) of the second eccentric stirring shaft (52) is 126 mm (600 mm × 0.21) or less, and the difference in their lengths is dimensioned to be 21.6 mm or less. Also, for example, in the case of a cylindrical pot (T) with a diameter (inner diameter) of φ400 mm, it is preferable that the spacing distance (D1) of the first eccentric stirring shaft (51) is 69.6 mm (400 mm × 0.174) or less, the spacing distance (D2) of the second eccentric stirring shaft (52) is 84 mm (400 mm × 0.21) or less, and the difference in their lengths is dimensioned to be 14.4 mm or less. Incidentally, in the case of the cylindrical pot (T) with the same diameter (inner diameter) of φ400 mm described in the illustrated embodiment of Patent Document 1, the difference in length between the short spacing distance (D1) of the first eccentric stirring shaft (61) and the long spacing distance (D2) of the second eccentric stirring shaft (62) is, for example, about 31.25 mm (about 115 mm - about 83.75 mm), which is significantly different.

[0082] Further, at the upper end of the first eccentric stirring shaft (51), a planetary gear (64) that meshes and rotates in a state of being externally tangent to the fixed sun gear (60) on the fixed bearing case (53) of the center main shaft (2) is fitted and integrated. The planetary gear (64) is composed of a spur gear having a smaller diameter than the fixed sun gear (60). The rotation (self-rotation) speed of the first eccentric stirring shaft (51) in the illustrated embodiment is in a fixed state predetermined by the gear ratio (revolution 1: self-rotation 2.2) of the meshing rotation of the two gears (60) and (64), and is, for example, 10 to 42 rpm.

[0083] On the other hand, a DC brushless motor serving as a dedicated second drive source (sub-drive source of the stirring mechanism) (47) for the second eccentric stirring shaft (52) is connected to the upper end of the second eccentric stirring shaft (52) via a coupling (65). As a result, the second eccentric stirring shaft (52) can be rotated (self-rotated) independently of the center main shaft (2) and the first eccentric stirring shaft (51) and at a higher speed than the first eccentric stirring shaft (51). (66) indicates a power supply line connected to the second drive source (DC brushless motor) (47), which is routed and wired through the hollow interior of the center main shaft (2) and the slip ring (58).

[0084] In the illustrated embodiment, since the second drive source (47) is a DC brushless motor with an electromagnetic brake and is relatively large, in order to maintain the weight balance of the first and second eccentric stirring shafts (51) and (52) centered on the center main shaft (2), it is preferable to attach a balance weight (67) from above the planetary gear (64) to the upper end of the first eccentric stirring shaft (51) via a stud bolt or the like (not shown). However, it is of course possible to employ a small brushless motor (47) without a brake. Also, as the second drive source (47), an AC geared motor can be employed instead of the DC brushless motor.

[0085] As an example, the rotation (self-rotation) speed of the second eccentric stirring shaft (52) in the illustrated embodiment is 50 to 4000 rpm, and reverse rotation is also possible. For the rotation speed of the second drive source (DC brushless motor or AC geared motor) (47) therefor, it can be appropriately changed and adjusted by a rotation control motor driver (48) built into the stirring action box (Ab).

[0086] In the illustrated embodiment, the first eccentric stirring shaft (51) has a rotation speed ratio of 2.2 times the revolution speed (revolution 1: rotation 2.2) with respect to the fixed sun gear (60) and the planetary gear (64). The second eccentric stirring shaft (52) also has a rotation speed ratio of 4 times the revolution speed (revolution 1: rotation 4), and is rotated independently by a second drive source (47) separate from the first drive source (3) at a speed higher than that of the first eccentric stirring shaft (51). However, the rotation speeds of these first and second eccentric stirring shafts (51) and (52) can be changed and adjusted according to various physical properties such as the viscosity and hardness / softness of the material to be processed, and the purpose of the treatment applied to the material (the various forms of the first and second agitators required).

[0087] When the center main shaft (2) is rotationally driven in the direction of the arrow (F) in FIG. 4 by the first drive source (AC geared motor) (3) of the stirring mechanism (A), the two shafts of the first and second eccentric stirring shafts (51) and (52) revolve slowly together in the same direction (F) around the center main shaft (2) via the rotating gear case (59) that rotates integrally with the center main shaft (2).

[0088] And simultaneously with this revolving motion, the first eccentric stirring shaft (51) rotates relatively quickly in the same direction (F) as the revolving motion by the meshing rotation of the planetary gear (64) and the fixed sun gear (60) at its upper end. On the other hand, the second eccentric stirring shaft (52) is rotated independently of the first eccentric stirring shaft (51) by the second drive source (DC brushless motor or AC geared motor) (47) at its upper end in the same direction (F) or the reverse direction (R) as the revolving motion, at a speed higher than that of the first eccentric stirring shaft (51). By rotating the second drive source (47) forward and backward, it is possible to selectively use the rotational motion in the same direction (F) as the revolving motion direction (F) and the rotational motion in the reverse direction (R) of the second eccentric stirring shaft (52).

[0089] As the first and second agitators (P1) and (P2) attached to the lower ends of the above-described first and second eccentric stirring shafts (51) and (52) and used, mainly when used together with the above-described cylindrical pot (T) for storing materials to be processed such as foods, cosmetics, chemicals, and industrial materials, if stirring, foaming, mixing, cutting, pulverizing, emulsifying, dispersing, kneading, crushing, and other necessary processes can be performed on the materials to be processed, various forms of articles made of vanes according to the purpose of the process, wire whippers, beaters, hooks, cutters, uneven-tooth-shaped rotors (disk-shaped shearing vanes), rotating resistance rods, and other metals or high-strength synthetic resins can be adopted.

[0090] In this regard, FIGS. 10 to 18 show the first to seventh usage examples in which the first and second agitators (P1) and (P2) in various forms are attached to the first and second eccentric stirring shafts (51) and (52) in a combined state. Taking the first usage example as a representative example and briefly explaining, the mounting support shaft (68) of the first agitator (P1) composed of bottom vanes as shown in FIG. 10 is attached to the first eccentric stirring shaft (51), and the mounting support shaft (69) of the second agitator (P2) composed of an upper, middle, and lower three-stage cutter is attached to the second eccentric stirring shaft (52), and both are detachably attached from below so as to be able to rotate integrally.

[0091] Moreover, based on the fact that there is a difference in length (distance difference) in the distance (distance between centers) (D1) and (D2) from the above-described center main shaft (2) to the two shafts of the first and second eccentric stirring shafts (51) and (52), as is clear from FIG. 4, the rotational diameter (d1) of the first agitator (bottom vanes) (P1) attached to and used on the first eccentric stirring shaft (51) with a shorter distance (D1) is larger than the radius dimension (r) of the above-described cylindrical pot (T). In contrast, the rotational diameter (d2) of the second agitator (cutter) (P2) attached to and used on the second eccentric stirring shaft (52) with a longer distance (D2) is different and smaller than the rotational diameter (d1) of the first agitator (P1).

[0092] In that case, the rotational diameter (d2) of the second agitator (P2) may be sized to be smaller than the radius dimension (r) of the barrel pot (T), but as long as the first and second agitators (P1) and (P2) can rotate independently without interfering with each other's rotation trajectories, it is desirable to size the rotational diameter (d2) of the second agitator (P2) to be larger than the radius dimension (r) of the barrel pot (T).

[0093] If so, the first and second agitators (P1) and (P2) are in a laminated state or an engaged state where they overlap by a certain amount (W) as shown in Fig. 10, and both rotate (revolve) greatly beyond the vertical center line (O-O) of the barrel pot (T). By doing so, stirring, cutting, pulverizing, and other processes of the material to be processed near the center of the barrel pot (T) can be carried out efficiently without leakage.

[0094] In addition, the first agitator (P1) on the first eccentric stirring shaft (51) rotates in the same direction (F) as the direction (F) of the revolution of the first drive source (AC geared motor) (3) of the center main shaft (2), and describes a movement trajectory of an epicycloid curve as shown in Figs. 11 and 12. It can supply the material to be processed by pushing it from the barrel wall surface (outer side) of the barrel pot (T) toward the center. In addition to this, it also helps to prevent the material to be processed from burning while strengthening the heating force of the heating source (H).

[0095] In contrast, the second agitator (P2) on the second eccentric stirring shaft (52) can rotate in the same direction (F) as the first agitator (P1) on the first eccentric stirring shaft (51) as shown in Fig. 12 by a second drive source (DC brushless motor or AC geared motor) (47) independent of the first drive source (3), and can also rotate in the reverse direction (R). Since the same direction (F) and the reverse direction (R) can be selectively used, the second agitator (P2) is rotated in the reverse direction (R) with respect to the first agitator (P1) to draw a hypocycloid curve as the movement locus as shown in Fig. 11, and the material to be processed pushed in and supplied from the first agitator (P1) is pushed out from near the center of the cylindrical pot (T) to the cylindrical wall surface (outer side), and can be stirred, cut, or pulverized so as to strike against the cylindrical wall surface of the cylindrical pot (T).

[0096] Fig. 12 shows the combined overall rotation locus of the epicycloid curve which is the rotation locus of the first agitator (P1) and the hypocycloid curve which is the rotation locus of the second agitator (P2). Fig. 11 shows the combined overall rotation locus of the epicycloid curves drawn by both agitators (P1) and (P2) when the second agitator (P2) also rotates in the same direction (F) as the first agitator (P1). In either case, the second agitator (P2) on the second eccentric stirring shaft (52) is in a state of overlapping the first agitator (P1) on the first eccentric stirring shaft (51) by a certain amount (W) as described above, and moreover, since it is rotated (self-rotated) at a higher speed than the first agitator (P1), due to the cooperative action of the speed difference of the self-rotation movement and the overlap amount (W), the necessary stirring, cutting, pulverizing, mixing, and other various processes of the material to be processed can be carried out more efficiently in a shorter time. In the case of the first usage example shown in Fig. 10, it is desirable to set the rotation speed of the first eccentric stirring shaft (51) to 42 rpm or less and the rotation speed of the second eccentric stirring shaft (52) to 100 rpm or more.

[0097] In the previous Figure 10, the first usage example of the twin-screw mixer according to the above-described embodiment of the present invention suitable for stirring, cutting, and pulverizing jam, sauce, etc. was shown. However, as shown in the second usage example of Figure 13, both the first and second agitators (P1) and (P2) are cutters in three upper, middle, and lower stages, and by the speed difference of rotation (rotation about its own axis) in an overlapping state where the cutters bite or overlap each other by a certain amount (W), in addition to the effects expected in the first usage example, there is also an effect of removing the material to be processed adhering to each cutter.

[0098] Also, as shown in the third usage example of Figure 14, a disk-shaped shearing blade or a concave-convex tooth-shaped rotor replacing the cutter of the first usage example is adopted as the second agitator (P2), and by using it in combination with the bottom blade of the first agitator (P1), the material to be processed pushed and supplied from the bottom blade to the central part of the barrel pot (T) can be effectively sheared by the second agitator (P2) rotating (rotating about its own axis) at a high speed of, for example, 100 rpm or more, and stirring, dispersion, pulverization, and emulsification of the material based on the shearing can be promoted, which is beneficial for dressings, curry roux, fruit juice beverages, lotions, and other low-viscosity liquids.

[0099] In that case, particularly as shown in the fourth usage example of Figure 15, by adopting the upper and lower two stages of a downward convection adjustment blade and an upward convection adjustment blade replacing the bottom blade of the third usage example and using it in combination with the disk-shaped shearing blade or the concave-convex tooth-shaped rotor of the second agitator (P2), it is suitable to quickly generate fine convection in the low-viscosity liquid and promote emulsification. The combined use of the first and second agitators (P1) and (P2) having mutually different forms is also useful for obtaining various processing effects.

[0100] As shown in the fifth usage example of FIG. 16, by using the bottom blades of the first stirrer (P1) and the wire whipper (wire beater) of the second stirrer (P2) in combination with meringue, cream, etc. as the material to be processed, the wire whipper (wire beater) that rotates at high speed (rotates on its own axis) cuts into the egg white that has been pushed in and supplied from the bottom blades, and at the same time, the egg white is slapped against the barrel wall surface of the barrel-shaped pot (T), enabling efficient foaming in a short time.

[0101] Furthermore, in the sixth and seventh usage examples of FIGS. 17 and 18, the first stirrer (P1) is a single blade or round bar blade, and the second stirrer (P2) used in combination with it is a rotating resistance body composed of a round bar or conical wire with a rotation diameter (d2) smaller than the radius dimension (r) of the barrel-shaped pot (T). Due to the high-speed rotation (rotation on its own axis) of the resistance body, the material to be processed adhering to the first stirrer (P1) is scraped off from the first stirrer (P1) so as not to be carried around. According to this, it is useful for highly efficient processing such as stirring, mixing, kneading, and crushing of powdery substances, kneaded substances, and other materials to be processed with high viscosity.

[0102] In any of the first to seventh usage examples shown in FIGS. 10 to 18, as suggested in FIGS. 2 and 4, a scraper (70) for scraping off the material to be processed adhering to the barrel wall surface of the barrel-shaped pot (T) is suspended from the eccentric part of the rotating gear case (59) in the above stirring mechanism (A) toward the inside of the barrel-shaped pot (T) by a mounting bracket (71), and this is also preferably revolved slowly together with the first and second eccentric stirring shafts (51) and (52) by the first driving source (3) for center spindle rotation. In that case, it goes without saying that the scraper (70) hangs down near the adjacent position of the first stirrer (P1) and the second stirrer (P2) and does not interfere with the rotation (rotation on its own axis) movement trajectories of both stirrers (P1) and (P2).

[0103] Furthermore, the reference numeral (S) in FIGS. 1 and 4 corresponds to a wireless transmitter for the wireless receiver mentioned above. This wireless transmitter also has its tip temperature sensing part (contact type heating temperature sensor) (73) hanging down to the inside of the measuring pot (T) from another eccentric part of the rotary gear case (59) in the stirring mechanism (A) via the sensor holder (72). Therefore, it revolves together with the first and second eccentric stirring shafts (51) (52) and the first and second stirrers (P1) (P2).

[0104] The wireless transmitter (S) is assembled into an overall syringe shape from a metal housing body (74) as extracted and shown in FIG. 19, a base (76) that is screwed and fastened in an openable and closable manner via waterproof O-rings (75) to both ends of its opening, a synthetic resin cap (77), and an elongated metal nose tube (78) that projects integrally from the center of the base (76). A contact type temperature sensor (73) such as a thermistor, a resistance temperature detector foil, or a thermocouple foil is attached to the tip (lower end) of the nose tube (78) that is to be inserted into the material to be processed in the measuring pot (T) for use.

[0105] Moreover, a substrate (79) on which a microcomputer is mounted and a battery or cell (80) as its power source are built into the housing body (74), and a transmission antenna (81) is built into the cap (77). (82) is a transmission line that connects the temperature sensor (73) and the substrate (79).

[0106] Then, the current temperature data of the material to be processed detected by the temperature sensor (73) of such a wireless transmitter (S) is transmitted as a wireless signal from the transmitter (S) to the wireless receiver (45). When the current temperature data reaches a preset target temperature, the high-frequency power supply (heating inverter) (35) of the heating source (electromagnetic induction heater (H) in the illustrated embodiment) is controlled to be turned off by the output electrical signal from the receiver (45), so that the heating of the measuring pot (T) automatically stops.

[0107] However, even in any of the first to seventh usage examples described above, the barrel pot (T) can be heated to bring the material to be processed to an optimal temperature. However, depending on the type of the material to be processed and the purpose of the treatment applied thereto, it may be possible not to use the heating source (H) and the heating temperature sensor (73). Therefore, as the barrel pot (T) for storing the material to be processed, one that is not conductive can also be adopted.

Explanation of Signs

[0108] (1) ····· Support column (2) ····· Center spindle (3) ····· First drive source (10) ····· Pot support arm (12) ····· Rear wall plate (15) ····· Lifting slider (17) ····· Bearing plate (18) ····· Nut (19) ····· Rotating screw shaft (20) ····· Lifting guide shaft (26) ····· Lifting actuator (29a)(29b)(29c) ··· First to third proximity switches (30a)(30b) ··· Position detection pins (45) ····· Wireless transmitter (46) ····· Inverter for rotation control (47) ····· Second drive source (48) ····· Motor driver for rotation control (51) ····· First eccentric stirring shaft (52) ····· Second eccentric stirring shaft (53) ····· Fixed bearing case (58) ····· Slip ring (59) ····· Rotating gear case (60) ····· Fixed sun gear (64) ····· Planet gear (66) ····· Power supply line (67) ····· Balance weight (A) ····· Stirring mechanism (Ab) ····· Stirring action box (d1) ···· Rotation diameter of the first stirrer (d2) ···· Rotation diameter of the second stirrer (D1) ···· Spacing distance between the first eccentric stirring shafts (D2) ···· Spacing distance between the second eccentric stirring shafts (H) ····· Heat source (Hb) ···· Heating action box (L) ···· Lifting and lowering actuating mechanism (M) ···· Mixer body frame (P1) ···· First stirrer (P2) ···· Second stirrer (r) ···· Radius of the cylindrical pot (T) ···· Cylindrical pot (W) ···· Overlap amount

Claims

1. A cylindrical pot (T) with a substantially flat bottom for containing a material to be processed, A heating box (Hb) incorporating a heat source (H) facing the position directly below the cylindrical pot (T), A stirring box (Ab) fixedly supported by a column (1) of a mixer body frame (M) so as to face the position directly above the cylindrical pot (T), A center spindle (2) hanging down from the stirring box (Ab) toward the center of the cylindrical pot (T), A first drive source (3) for rotating the center spindle built into the stirring box (Ab), A rotating gear case (59) integrally rotated with the center spindle (2) by the first drive source (3), A first and a second eccentric stirring shaft (51) (52) hanging down from the rotating gear case (59) in parallel with the center spindle (2) toward the eccentric part in the cylindrical pot (T) and each rotatably supported by the rotating gear case (59), The distance (D1) between the first eccentric stirring shaft (51) and the center spindle (2) is made shorter than the distance (D2) between the second eccentric stirring shaft (52) and the center spindle (2). While connecting the first stirrer (P1) to the lower end of the first eccentric stirring shaft (51) so as to be integrally rotatable, The distance (D2) between the second eccentric stirring shaft (52) and the center spindle (2) is made longer than the distance (D1) between the first eccentric stirring shaft (51) and the center spindle (2). While connecting the second stirrer (P2) to the lower end of the second eccentric stirring shaft (52) so as to be integrally rotatable, When the center spindle (2) is rotationally driven by the first drive source (3), via the rotating gear case (59) integrally rotated with the center spindle (2), the first and second eccentric stirring shafts (51) (52) revolve around the center spindle (2) in the same direction (F) at the same time, In a vertical two-shaft mixer in which the first stirrer (P1) on the first eccentric stirring shaft (51) and the second stirrer (P2) on the second eccentric stirring shaft (52) are each defined to rotate without interfering with each other's rotational movement trajectories, The rotational diameter (d1) of the first stirrer (P1) is made larger than the radius (r) of the cylindrical pot (T), and the first stirrer (P1) is rotated in the same direction (F) as the direction (F) in which the first eccentric stirring shaft (51) revolves by the first drive source (3), so that the first stirrer (P1) describes a movement trajectory of an epicycloid curve, The second stirrer (P2) has a rotation diameter (d2) that is also smaller than the radius (r) of the saucepan (T) or is larger than the radius (r) of the saucepan (T) but smaller than the rotation diameter (d1) of the first stirrer (P1), and is rotated by a dedicated second drive source (47) separately and independently attached to the upper end of the second eccentric stirring shaft (52) in the same direction (F) or the opposite direction (R) as the first stirrer (P1) at a higher speed than the first stirrer (P1), so that the second stirrer (P2) traces a motion trajectory that is an epicycloid curve or a hypocycloid curve.

2. A gear case (59) that rotates integrally with the center main shaft (2) is attached to the lower end of the center main shaft (2) exposed from a fixed bearing case (53) that rotatably supports the center main shaft (2), and the first and second eccentric agitating shafts (51) and (52) are supported by the rotating gear case (59) so that they can rotate about their own axes. A planetary gear (64) fitted and integrated with the upper end of the first eccentric stirring shaft (51) is engaged in a state of circumscribing with a fixed sun gear (60) fitted and integrated with the fixed bearing case (53) at a corresponding height position, 2. The vertical twin-shaft mixer according to claim 1, characterized in that a DC brushless motor or an AC geared motor serving as a second drive source (47) dedicated to the second eccentric agitating shaft (52), which is independent of an AC geared motor serving as a first drive source (3) for rotating the center shaft, is integrally connected to an upper end of the second eccentric agitating shaft (52).

3. The center shaft (2) is hollow, and a hollow slip ring (58) is attached to the upper end of the center shaft (2) and integrated therewith.

3. The vertical twin-shaft mixer according to claim 2, wherein a power supply line (66) connected to a second drive source (47) for rotating the second eccentric agitating shaft is wired through the hollow interior of the center main shaft (2) and the slip ring (58).

4. 3. The vertical twin-shaft mixer according to claim 2, characterized in that in order to maintain a weight balance around the center shaft (2) with the second eccentric agitating shaft (52) whose upper end is integrally connected with the second driving source (47), not only a planetary gear (64) having a smaller diameter than the fixed sun gear (60) is attached to the upper end of the first eccentric agitating shaft (51), but also a balance weight (67) is attached from above the planetary gear (64).

5. The rotation speed of the first eccentric stirring shaft (51) rotating about its own axis in the same direction (F) as the direction (F) of the revolution movement through the center main shaft (2) and the rotation gear case (59) is changed and adjusted by an inverter (46) for rotation control, which is provided by an AC geared motor serving as the first drive source (3) for the rotation of the center main shaft. The vertical two-shaft mixer according to claim 1 or 2, characterized in that it is so determined.

6. The rotation speed of the second eccentric stirring shaft (52) rotating about its own axis in the same direction (F) or the reverse direction (R) as the direction (F) of the revolution movement is changed and adjusted by a motor driver (48) for rotation control, which is provided by a DC brushless motor or an AC geared motor serving as the second drive source (47) for the rotation of the second eccentric stirring shaft. The vertical two-shaft mixer according to claim 1 or 2, characterized in that it is so determined.

7. A scraper (70) that scrapes the material to be processed in contact with the barrel wall surface of the barrel pot (T) is suspended from the eccentric part of the rotation gear case (59) that revolves integrally with the center main shaft (2) toward the inside of the barrel pot (T), and a contact type temperature sensor (73) of the material to be processed, which is the temperature sensing part of the wireless transmitter (S), is each suspended, and The vertical two-shaft mixer according to claim 1 or 2, characterized in that a wireless receiver (45) corresponding to the wireless transmitter (S) is built in the stirring action box (Ab).

8. A back wall plate (12) is integrally suspended from the rear end of a pot receiving arm (10) that suspends the barrel pot (T) at a mid-height position of the support column (1), and A lifting slider (15) that can move up and down along a pair of lifting guide shafts (20) erected parallel to the support column (1) is integrally projected backward from the back wall plate (12) of the pot receiving arm (10), and A nut (18) attached and integrated to the horizontal bearing plate (17) of the lifting slider (15) is screwed and fastened to a rotating screw shaft (19) erected between the two lifting guide shafts (20), and When the rotating screw shaft (19) is rotated by a geared motor (26) for lifting operation from above, it is determined that the lifting slider (15) on the pot receiving arm (10) side only moves up and down along the lifting guide shaft (20). The vertical two-shaft mixer according to claim 1 or 2, characterized in that it is so determined.

9. In addition to the first proximity switch (29a) for detecting the upper limit position of the elevating slider (15) and the second proximity switch (29b) for detecting the lower limit position, a third proximity switch (29c) for detecting a fixed position is also provided. The vertical two-shaft mixer according to claim 8, characterized in that the mixer is set not to operate unless both detection signals of the first proximity switch (29a) and the third proximity switch (29c) are output.

10. A method of using the vertical two-shaft mixer according to claim 1, wherein a first agitator (P1) having a rotational diameter (d1) larger than the radius (r) of the cylindrical pot (T) is used as a bottom blade for preventing burning due to heating of the material to be processed. Also, a second agitator (P2) having a rotational diameter (d2) larger than the radius (r) of the cylindrical pot (T) but smaller than the rotational diameter (d1) of the first agitator (P1) is used as a shearing cutter or a concave-convex tooth-shaped rotor for the material to be processed. The first and second agitators (P1) and (P2) are kept in an overlapping state where they overlap or engage with each other by a certain amount (W) near the vertical center line (O - O) of the cylindrical pot (T). Moreover, during the revolution of the first agitator (P1) by the first drive source (3), the second agitator (P2) is rotated at a higher speed than the first agitator (P1) in the same direction (F) or the opposite direction (R) by a second drive source (47) independent of the first drive source (3), so as to promote agitation, pulverization, and emulsification based on shearing of the material to be processed. A method of using a vertical two-shaft mixer is characterized by this.

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