Vertical twin-shaft mixer and method of using the same

Abstract

To provide a vertical type biaxial mixer capable of widely and effectively performing not only general stirring and mixing but also various kinds of processing such as cutting, crushing, emulsifying and kneading mainly to food, cosmetics and other materials to be processed.SOLUTION: A rotation radius P1 of a first stirrer d1 on a first eccentric stirring shaft 51 is set to be larger than a radius r of a material storage cylindrical pot T, and the first stirrer is rotated in the same direction F as a direction F in which the first eccentric stirring shaft 51 is revolved by a first drive source. While the first stirrer draws a motion trajectory of an epicycloid curve, the rotation radius P2 of the second stirrer d2 on the second eccentric stirring shaft 52 is set to be smaller than that of the first stirrer, and the second stirrer is rotated at a higher speed than the first stirrer in the same direction F or the opposite direction R as the first stirrer by the second drive source 47 independently attached to the second eccentric stirring shaft 52, so that the second stirrer draws a motion trajectory of an epicycloid curve or a hypocycloid curve.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] This invention relates to a commercial vertical twin-shaft mixer and its usage, which is designed to be able to perform not only general whipping, stirring, and mixing of food, chemicals, cosmetics, industrial materials, and other materials to be processed, but also a wide range of other processes such as emulsification, dispersion, cutting, pulverization, and kneading. [Background technology]

[0002] The applicant for the patent of the present invention has commercialized the patented inventions described in Patent Documents 1 and 2 for vertical twin-shaft mixers for food ingredients, and has achieved remarkable results in particular in the production of meringue, fresh cream, sponge cake, etc. by whipping egg whites using a wire whisk as a stirrer. However, it has been found that there are still problems that need to be improved, as described below. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5452751 [Patent Document 2] Patent No. 5873857 Summary of the Invention [Problem to be solved by the invention]

[0004] That is, taking Patent Document 1 as a representative example, in the configuration of the vertical mixer, a first pinion gear (planetary gear) (74) at the upper end of the first eccentric agitating shaft (61) is meshed in such a way that it is inscribed in a large-diameter internal gear (fixed sun gear) (68) on the side of the gear support ceiling plate (66) that is in a fixed installation state, and a second pinion gear (planetary gear) (77) at the upper end of the second eccentric agitating shaft (62) is meshed and rotated with the fixed internal gear (68) via an idle gear (intermediate gear) (75).

[0005] Therefore, according to the description of the illustrated embodiment intended for a pot (T) with a diameter (inner diameter) of approximately φ400 mm, the spacing distance (D2) between the center main shaft (60) and the second eccentric stirring shaft (62) is long, "for example, approximately 115 mm," while the spacing distance (D1) between the center main shaft (60) and the first eccentric stirring shaft (61) is short, "for example, 83.75 mm," and the difference between the long and short lengths (approximately 31.25 mm) is excessively large, so that the second stirring bar (P2) on the second eccentric stirring shaft (62) comes close to the body wall of the pot (T). As a result, it becomes necessary to use a second stirring bar (P2) with a rotation diameter (d2) that is necessarily smaller than the radius dimension (r) of the pot (T), and as a result, the ingredients cannot be stirred effectively and without leakage all the way to the center of the pot (T).

[0006] The first stirrer (P1) with a large rotation diameter (d1) is primarily responsible for stirring the ingredients, and the second stirrer (P2) with a small rotation diameter (d2) only assists in this. Therefore, even though the first and second stirrers (P1) (P2) are attached to the first and second eccentric stirring shafts (61) (62) in a combined state, there are significant restrictions on their types, the ingredients that can be used, and the types of action (applications) that they can perform. It is believed that this problem will occur in the same way even if a fixed external gear is used instead of the fixed internal gear (68), as long as an idle gear (intermediate gear) (75) is interposed between the center main shaft (60) and the second pinion gear (77) on the second eccentric stirring shaft (62).

[0007] Furthermore, the planetary gear mechanism having the fixed internal gear (68) and idle gear (75) causes the first stirring bar (P1) on the first eccentric stirring shaft (61) to describe a hypocycloidal curve of rotational motion locus, while the second stirring bar (P2) on the second eccentric stirring shaft (62) to describe an epicycloidal curve of rotational motion locus. Therefore, although the first and second stirring bars (P1) (P2) are both useful for whipping egg whites (food ingredients) using wire whisks as shown in Figures 20 and 21, this, coupled with the fact that the rotational gear ratio of the planetary gear mechanism is predetermined and fixed, means that it cannot be used for emulsification, cutting, grinding, or other operations that require the stirring bars to rotate at high speeds of, for example, 1000 rpm or more.

[0008] In this regard, in order to achieve high-speed rotation of the first and second stirring bars (P1) (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 high speed. In this case, the contact-type temperature sensor (103) for ingredients suspended from the center main shaft (60) or the rotating bowl (70), the scraper for scraping ingredients adhering to the wall surface of the pot (T), and the like will have to revolve at high speed, causing problems.

[0009] Furthermore, the physical structure of the stirring mechanism (A) of the vertical mixer requires not only the idle gear (75), the idle gear shaft (76), and the radial bearing (78) interposed between them, but also a large-diameter fixed internal gear (68). In order to prevent the second stirring bar (P2) from approaching the body wall of the pot (T) as much as possible, the diameters of the second eccentric stirring shaft (62) and the second bearing case (70d) are made smaller than those of the first eccentric stirring shaft (61) and the first bearing case (70c). This difference in diameter increases the number of parts, resulting in an extremely complex and special configuration, which leads to higher manufacturing costs and worse maintainability. [Means for solving the problem]

[0010] The present invention aims to solve these problems, and to achieve this aim, claim 1 provides a pot with a substantially flat bottom for containing the material to be treated,

[0011] A heating box with a built-in heat source located directly below the pot,

[0012] a mixing box fixedly supported by a support of the mixer body frame so as to face directly above the stockpot;

[0013] A center main shaft suspended from the stirring box toward the center of the pot;

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

[0015] a rotary gear case that is rotated integrally with the center main shaft by the first drive source;

[0016] The apparatus further comprises first and second eccentric stirring shafts that hang down from the rotary gear case toward the eccentric portion in the pot in a state parallel to the center main shaft and are journaled on the rotary gear case so as to be able to rotate on their own axes,

[0017] The distance between the first eccentric stirring shaft and the center main shaft is set to a relatively short dimension, and the first stirring bar is connected to the lower end of the first eccentric stirring shaft so that it can rotate integrally with the shaft.

[0018] The distance between the second eccentric stirring shaft and the center main shaft is set to a relatively long dimension, and a second stirring bar is connected to the lower end of the second eccentric stirring shaft so that it can rotate integrally with the shaft.

[0019] When the center main shaft is rotated by the first drive source, the first and second eccentric stirring shafts revolve around the center main shaft in the same direction via the rotating gear case which rotates integrally with the center main shaft.

[0020] In a vertical twin-shaft mixer, the first stirring bar on the first eccentric stirring shaft and the second stirring bar on the second eccentric stirring shaft are set so as to rotate independently without interfering with each other in their rotational motion loci,

[0021] The rotation diameter of the first stirring bar is set to a dimension larger than the radius of the pot, and the first driving source rotates the first eccentric stirring shaft in the same direction as the direction of revolution, so that the first stirring bar traces an epicycloid curve of motion,

[0022] The rotation diameter of the second agitator is set to a dimension smaller than the radius of the pot or larger than the radius of the pot but smaller than the rotation diameter of the first agitator, and a dedicated second drive source separately attached to the upper end of the second eccentric agitator shaft causes the second agitator to rotate in the same direction as the first agitator or in the opposite direction at a higher speed than the first agitator, so that the second agitator traces an epicycloid or hypocycloid curve.

[0023] In claim 2, a gear case that rotates integrally with the center main shaft is attached to the lower end of the center main shaft that is exposed from a fixed bearing case that rotatably supports the center main shaft, and the first and second eccentric stirring shafts are supported by the rotating gear case so that they can rotate on their own axes,

[0024] The planetary gear, which is fitted and integrated with the upper end of the first eccentric stirring shaft, is meshed with the fixed sun gear, which is fitted and integrated with the fixed bearing case at a corresponding height position, in a state of circumscribing contact with the fixed sun gear;

[0025] A DC brushless motor or AC geared motor serving as a dedicated second drive source for the second eccentric stirring shaft, which is separate from an AC geared motor serving as the first drive source for rotating the center main shaft, is connected and integrated to the upper end of the second eccentric stirring shaft.

[0026] In claim 3, the center main shaft is hollow, and a hollow slip ring is attached to the upper end of the shaft and integrated with it.

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

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

[0029] Claim 5 is characterized in that the rotation speed of the AC geared motor, which serves as the first drive source for rotating the center main shaft, at which the first eccentric stirring shaft rotates in the same direction as the direction in which it revolves via the center main shaft and the rotating gear case, can be changed and adjusted by the rotation control inverter.

[0030] Claim 6 is characterized in that the rotation speed of the second eccentric agitator shaft, which rotates in the same direction or opposite direction to the revolution direction, is changed and adjusted by a DC brushless motor or AC geared motor serving as the second drive source for rotating the second eccentric agitator shaft, using a rotation control motor driver.

[0031] In claim 7, a scraper that comes into contact with the wall surface of the pot to scrape off the material to be treated, and a contact-type temperature sensor for the material to be treated, which is the temperature-sensing part of the wireless transmitter, are suspended from the eccentric part of the rotating gear case that revolves integrally with the center main shaft toward the inside of the pot, and

[0032] The radio transmitter and the corresponding radio receiver are built into the stirring box.

[0033] In claim 8, a rear wall plate is hung down integrally from the rear end of the pot support arm that suspends the pot at a mid-height position of the support,

[0034] A lifting slider that can be raised and lowered along a pair of lifting guide shafts that are erected parallel to the support columns is integrally extended rearward from the rear wall plate of the pot receiving arm,

[0035] The nut attached to the horizontal bearing plate of the lift slider is screwed and fastened to the rotary screw shaft that is erected between the two lift guide shafts.

[0036] When the rotating screw shaft is rotated from above by a geared motor for lifting operation, the lifting slider on the pot receiving arm side only moves up and down along the lifting guide shaft.

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

[0038] The mixer is set not to operate unless both the first and third proximity switches output detection signals.

[0039] Claim 10 is a method for using the vertical twin-shaft mixer described in claim 1, in which the first stirring bar having a rotation diameter larger than the radius of the saucepan is used as a bottom blade for preventing the material from burning due to heating,

[0040] Similarly, a second stirring bar having a rotation diameter larger than the radius of the pot but smaller than the rotation diameter of the first stirring bar is used as a cutter for shearing the material to be treated or a concave-convex rotor,

[0041] The first and second stirring bars are kept in a state where they are stacked or interlocked by a certain amount near the vertical center line of the pot,

[0042] Furthermore, while the first and second agitators are revolving due to the first drive source of the first agitator, the second agitator is rotated by a second drive source that is independent of the first drive source in the same direction as the first agitator or in the opposite direction at a higher speed than the first agitator, thereby promoting agitation, crushing and emulsification based on shearing of the material to be processed. [Effects of the Invention]

[0043] According to the above-mentioned configuration of claim 1, it is possible to solve all of the problems of the vertical twin-shaft mixer described in Patent Document 1 at the beginning, and it is possible to obtain an advantageous effect of providing a multifunctional vertical twin-shaft mixer.

[0044] In other words, unlike the vertical twin-shaft mixer described in Patent Document 1, as suggested by the first to seventh use examples, the use of a combination of different shapes for the first and second agitators on the first and second eccentric agitator shafts, the overlapping state in which they are piled up or interlocked to a certain extent near the center of the saucepan, and the large difference in the speed of the rotational motion of the first and second agitators all act organically as a whole, allowing not only whipping, stirring, and mixing of general ingredients, but also cutting, crushing, kneading, emulsifying, and a wide variety of other processes for various materials to be processed.

[0045] In particular, if the configuration of claim 2 is adopted, the stirring mechanism of the vertical twin-shaft mixer can be simplified to the minimum necessary physical structure, resulting in excellent mass production efficiency and ease of maintenance.

[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 (rotating) the second eccentric stirring shaft can be smoothly and stably routed through the hollow interior of the center main shaft and slip ring.

[0047] If the configuration of claim 4 is adopted, the pair of first and second eccentric stirring shafts in the stirring mechanism can be kept in a well-balanced state with respect to the vertical center line of the center main shaft, which has the effect of obtaining stable installation and durability of the stirring mechanism.

[0048] If the configuration of claim 5 is adopted, the rotation (revolution) speed of the center main shaft caused by the first drive source and, in turn, the rotation (spin) speed of the first eccentric stirring shaft via the planetary gear mechanism can be changed and adjusted by the inverter for rotation control, while if the configuration of claim 6 is adopted, the rotation (spin) speed of the second eccentric stirring shaft caused by the second drive source can be changed and adjusted by the motor driver for rotation control, both of which are useful for processing a wide variety of materials to be processed.

[0049] Furthermore, if the configuration of claim 7 is adopted, when necessary processing of the material to be processed is performed while a saucepan is being heated, the material adhering to the wall surface of the pot can be automatically and effectively scraped off by the revolving scraper. 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 temperature sensor) of the wireless transmitter, which also revolves, and when the predetermined target temperature is reached, this can be transmitted from the wireless transmitter to the wireless receiver in the mixing box, and heating by the heating source can be stopped based on the detection output signal of the receiver, which is also useful for automatic operation of the mixer.

[0050] If the configuration of claim 8 is adopted, when the rotating screw shaft is rotated from above by a geared motor for lifting operation, the lifting slider on the pot supporting arm side will only move up and down along its lifting guide shaft, and the heating action box attached and fixed to the back wall plate on the pot supporting arm side will also move up and down together, so that the pot supported and suspended by the pot supporting arm and the heat source installed inside the heating action box will always maintain a constant and accurate positional relationship and will move up and down together with the first and second stirrers facing from above, allowing for stable heating action that is neither too much nor too little.

[0051] In this case, if the configuration of claim 9 is adopted, the first proximity switch will detect the upper limit position of the lifting slider, and at the same time the third proximity switch will detect the predetermined fixed position of the lifting slider, and unless both detection signals are output, the mixer will not operate, as it will be judged that the pot has not yet been set in the correct fixed position for the necessary processing of the material to be processed, and will be in a dangerous state.This is useful for safety.

[0052] Furthermore, according to the configuration of claim 10, the material to be treated can be heated without the risk of burning, while applying shear force to the material by the high-speed rotation (autorotation) of the second stirring bar, thereby achieving the effect of promoting stirring, pulverization, and emulsification with high efficiency. [Brief explanation of the drawings]

[0053] [Figure 1] 1 is a side cross-sectional view showing a schematic overall view of a vertical twin-shaft mixer according to a preferred embodiment of the present invention. [Figure 2] FIG. 2 is an enlarged view showing the stirring mechanism of FIG. 1. [Figure 3] FIG. 3 is a plan view of FIG. 2. [Figure 4] FIG. 4 is an enlarged cross-sectional view taken along line 4-4 in FIG. 2. [Figure 5] FIG. 10 is an enlarged plan view showing the lifting and lowering mechanism of the saucepan. [Figure 6] FIG. 2 is a side cross-sectional view of the lifting and lowering mechanism. [Figure 7] FIG. 7 is a front view of FIG. 6. [Figure 8] FIG. 10 is a side cross-sectional view showing the raised state of the pot when the mixer is operating. [Figure 9] A corresponding side cross-sectional view showing the lowered state of the pot at the end of the operation. [Figure 10] FIG. 2 is a cross-sectional view showing a first example of use of the mixer. [Figure 11] FIG. 1 is a plan view of the epicycloid curve, which is the rotational motion trajectory of the first stirring bar, the hypocycloid curve, which is the rotational motion trajectory of the second stirring bar, and the overall rotational motion trajectory obtained by combining the two curves. [Figure 12]This is a plan view of the epicycloid curves, which are the rotational motion trajectories of the first and second stirring bars, and the overall rotational motion trajectory obtained by combining these curves. [Figure 13] FIG. 10 is a cross-sectional view showing a second example of use of the mixer. [Figure 14] FIG. 10 is a cross-sectional view showing a third example of use of the mixer. [Figure 15] FIG. 10 is a cross-sectional view showing a fourth example of use of the mixer. [Figure 16] FIG. 10 is a cross-sectional view showing a fifth example of use of the mixer. [Figure 17] FIG. 10 is a cross-sectional view showing a sixth example of use of the mixer. [Figure 18] FIG. 10 is a cross-sectional view showing a seventh example of use of the mixer. [Figure 19] FIG. 1 is a cross-sectional view of a wireless transmitter with a contact-type heated temperature sensor. DETAILED DESCRIPTION OF THE INVENTION

[0054] A preferred embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows the overall outline of a vertical twin-shaft mixer according to the embodiment, which comprises a rigid mixer body frame (M) installed on a work floor, a pot (T) with a substantially flat bottom for containing materials to be processed that is stably suspended at an intermediate height position on the support columns (1) of the mixer body frame (M), and a mixing rack (T) fixed and supported by the support columns (1) of the mixer body frame (M) so as to face directly above the pot (T). The system comprises a stirring box (Ab), a central main shaft (2) of the stirring mechanism (A) suspended from the stirring box (Ab) toward the center of the pot (T), a first drive source (3) for rotating the central main shaft installed inside the stirring box (Ab), a heating box (Hb) with a built-in heating source (H) located directly below the pot (T), and a lifting mechanism (L) for lifting and lowering the pot (T) and the heating box (Hb) together relative to the stirring mechanism (A).

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

[0056] However, if the pot (T) is conductive, it may be made from aluminum-iron clad material, ferritic stainless steel, copper sprayed with magnetic iron powder, or iron that is itself magnetic. A bowl pot that does not have a conical protrusion protruding inward from the center of the bottom is also included in the above pot (T).

[0057] (4) is a ring-shaped locking flange welded to the middle height position of the body wall of the above-mentioned cylindrical pot (T), and has a pair of left and right ears (5) that protrude outward integrally from its diameter line, and mounting holes (6) opening into both ears (5) are designed to be inserted and removed freely from above into a pair of left and right centering guide pins that hang down from the pot support arm (described later) on the mixer main frame (M) side.

[0058] (7) is a pair of left and right handles located directly above the two ear pieces (5) protruding from the locking flange (4), and they are U-shaped facing each other in a plan view and protrude outward integrally from the body wall of the pot (T). Therefore, while holding these handles with both hands, the worker can insert and remove the mounting hole (6) on the pot (T) side into and from the centering guide pin on the pot support arm side described below, or carry the pot (T).

[0059] Next, the mixer body frame (M) is equipped with a rigid support column (1) made of a channel-shaped steel material that opens backward when viewed from above, as well as a leg frame (8) welded from steel pipe material into a pseudo-H shape when viewed from above, and the middle part of the leg frame (8) is welded in an assembled state so that it passes through and crosses the bottom end of the support column (1). (9) is an adjustment seat for the installation height that is screwed and fastened to each of the multiple points where the leg frame (8) touches the ground.

[0060] Furthermore, with regard to the lifting mechanism (L) that raises and lowers the pot (T) and its heating action box (Hb) together, (10) is a pot support arm that receives and suspends the locking flange (4) of the pot (T), and is approximately U-shaped or horseshoe-shaped when viewed from above as shown in Figures 1 and 5 to 7. A pair of left and right centering guide pins (11) that hang down integrally from near the front end of the pot are inserted and set freely into the mounting holes (6) on the pot (T) from above, so that the pot (T) is automatically kept fixed in an accurate centered state (positioned state) in relation to the stirring mechanism (A) and heat source (H).

[0061] On the other hand, (12) is a rear wall plate that hangs down integrally from the rear end of the pot support arm (10) and is parallel to the support columns (1) of the mixer main body frame (M). A pair of left and right lift support plates (13) extend rearward from the rear wall plate (12) at a fixed interval and wider than the support columns (1). (14) are bolts that attach and secure the lift support plates (13) to the rear wall plate (12).

[0062] (15) is a lifting slider attached to the protruding tip (rear end) of both lifting support plates (13) from the left and right lateral directions with a plurality of fixing bolts (16) so as to surround the open rear surface of the support pillar (1), and is provided with a pair of upper and lower horizontal bearing plates (17) that are interposed inside the support pillar (1), and a nut (18) that forms a ball screw mechanism is attached and integrated from below to the lower bearing plate (17).

[0063] Also, (19) is a rotary screw shaft that forms the ball screw mechanism, and (20) is a pair of left and right lift guide shafts that are parallel to and adjacent to the rotary screw shaft (19), both of which lift guide shafts (20) and the rotary screw shaft (19) stand vertically parallel to the support column (1), and the rotary screw shaft (19) is threadedly fastened to a nut (18) on the lift slider (15) side. Moreover, the rotary screw shaft (19) and both lift guide shafts (20) completely pass through the bearing disk (17) of the lift slider (15).

[0064] (21) denotes a pair of upper and lower lifting unit bases fixed to the support columns (1) of the mixer main body frame (M) with a plurality of bolts (22), and the upper and lower ends of both the lifting guide shafts (20) are respectively attached and fixed to the lifting unit bases (21), while the upper and lower ends of the rotating screw shaft (19) are similarly rotatably supported by the lifting unit bases (21) via ball bearings (23), respectively. (24) denotes the bearing case.

[0065] Furthermore, a geared motor (26) with a brake, which is the lifting and lowering operation source for 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) moves up and down along the pair of left and right lifting guide shafts (20) via the nut (18) that is threadedly fastened to it, and as a result, the pot (T) suspended and supported by the pot receiving arm (10) moves up and down as shown in Figures 8 and 9. (27) is a safety cover that entirely covers the lifting operation mechanism (L).

[0066] In this case, first to third proximity switches (29a), (29b), and (29c) are attached to a switch support bracket (28) that is vertically installed parallel to the support columns (1) and the lift guide shaft (20) of the mixer main body frame (M), while a pair of upper and lower position detection pins (30a), (30b) that are detected by the proximity switches (29a), (29b), and (29c) protrude rearward from the lift slider (15).

[0067] 1 and 6, the first and second proximity switches (29a) and (29b) detect the upper and lower limit positions of the lift-up slider (15), respectively, while the third proximity switch (29c) detects the home position of the lift-up slider (15). Unless the first proximity switch (29a) detects the upper position detection pin (30a) of the lift-up slider (15) and the third proximity switch (29c) detects the lower position detection pin (30b) of the lift-up slider (15), and both detection signals are output, the mixer assumes that the stockpot (T) is not set in the correct home position for mixing the material, indicating a dangerous condition, and will not operate. The mixer will not operate, even if the mixing switch or heating switch on the control panel (not shown) is turned on.

[0068] The heating box (Hb) is assembled into a disk shape corresponding in size to the stockpot (T) as shown in Figures 1 and 6, and an attachment stay (31) that protrudes rearward integrally from the body wall is attached to the back wall plate (12) of the pot support arm (10) by a plurality of fixing bolts (32), so that it rises and falls together with the stockpot (T).

[0069] The heating source (H) in the illustrated embodiment is an electromagnetic induction heater, in which a single electromagnetic induction heating coil (33) is fixed in a spiral configuration on the upper surface of its flat coil support base (34), and its connection terminal is electrically wired to a heating inverter (high-frequency power source) (35) in the stirring box (Ab).

[0070] The coil support base (34) is detachably attached to the bottom of the heating box (Hb) by a plurality of its pedestals (36) and fixing bolts (37), allowing the electromagnetic induction heater to be inserted and removed from below the box (Hb). (38) is a blower fan installed on the bottom of the heating box (Hb). However, instead of an electromagnetic induction heater, an infrared heater or other electric heater may be used as the heat source (H) for the stockpot (T). It should be noted that the heating source is not limited to an electric heater; a gas burner, steam jacket, or other heater may also be used.

[0071] Next, the stirring box (Ab) will be explained. It is shaped like an inverted L in side view as shown in Figures 1 and 4, and a horizontal motor mounting base (40) is fixedly mounted in the upper space of its upper base plate (39). An AC geared motor for rotating the center main shaft, which constitutes the first drive source (main drive source) (3) of the stirring mechanism (A), is attached and fixed so that its movement can be adjusted forward and backward in the front-to-back direction. (41) is a threaded rod for adjusting the movement.

[0072] (42) is a drive sprocket fitted onto the motor output shaft (43), and (44) is a support mast suspended from the motor mounting base (40), on the upper end of which are mounted a radio receiver (45) corresponding to a radio 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 (auxiliary drive source) (47) (described later).

[0073] In addition, (49) is a fixed partition wall plate installed vertically inside the stirring box (Ab), behind which the heating inverter (high frequency power supply) (35) for the electromagnetic induction heating coil (33) and various electrical components not shown are installed. (50) is a fixing nut that plugs the lower end of the center main shaft (2). The operation panel attached to the front (front face) of the stirring box (Ab) is not shown.

[0074] The stirring mechanism (A) is provided with a center main shaft (2) that is driven to rotate by an 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) as the center main shaft (2). Various first and second stirring bars (P1) and (P2) described below are detachably connected to the lower ends of both eccentric stirring shafts (51) and (52) so that they can rotate together.

[0075] 2 and 4, which show the stirring mechanism (A) in enlarged form, the center main shaft (2) is a hollow shaft that stands vertically and passes through the horizontal motor mounting base (40), and is rotatably supported by a fixed bearing case (53) flange-joined to the motor mounting base (40) and ball bearings (54). (55) is a pair of upper and lower OILES metals inserted between the fitting surfaces of the hollow center main shaft (2) and its fixed bearing case (53).

[0076] A driven sprocket (56) that is parallel to the drive sprocket (42) of the first drive source (AC geared motor) (3) is fitted integrally to the center main shaft (2) at an intermediate height position above the motor mount (40), and the center main shaft (2) is rotated by the first drive source (AC geared motor) (3) via an endless transmission chain (57) wound between them. The rotational (revolutionary) speed is 4.5 to 19 rpm in the illustrated embodiment.

[0077] In this case, a hollow slip ring (rotary connector) 58 is attached integrally to the upper end of the hollow center main shaft 2, while a gear case 59, which is circular or rectangular in plan view, is flanged to the lower end of the center main shaft 2 exposed from the fixed bearing case 53 so that they can rotate together, and a fixed sun gear 60 is fitted integrally to the lower end of the fixed bearing case 53. The fixed sun gear 60 is made of a spur gear with a diameter slightly larger than the outer diameter of the fixed bearing case 53.

[0078] 2 and 4, the first and second eccentric stirring shafts (51) and (52) hang down parallel to the center main shaft (2) from a rotary gear case (59) that rotates integrally with the center main shaft (2) toward an eccentric portion inside the saucepan (T), and are supported so as to rotate on their own axes by ball bearings (63) in first and second bearing cases (61) and (62) that are attached integrally to the rotary gear case (59). The first and second eccentric stirring shafts (51) and (52) have the same diameter (thickness), and the first and second bearing cases (61) and (62) also have the same diameter (thickness).

[0079] Moreover, of the two parallel shafts, one of the first eccentric agitating shafts (51) maintains a relatively short (close) distance (center-to-center distance) (D1) from the central main shaft (2), whereas the other, the second eccentric agitating shaft (52), maintains a relatively long (far) distance (center-to-center distance) (D2) from the central main shaft (2).

[0080] In the illustrated embodiment, for a pot (T) with a diameter (inner diameter) of 500 mm, the spacing distance (D1) of the first eccentric stirring shaft (51) is 87 mm, and the spacing distance (D2) of the second eccentric stirring shaft (52) is 105 mm, with a difference in length (distance) of 18 mm. The former, 87 mm, corresponds to a ratio of 0.174 when the diameter (inner diameter) dimension of the pot (T) is taken as a ratio of 1, and the latter, 105 mm, corresponds to a ratio of 0.21. These ratio values ​​are preferred examples that can be applied as maximum limits to pots (T) with different diameters (inner diameters).

[0081] Therefore, for example, in the case of a pot (T) having 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 x 0.174) or less, and the long spacing distance (D2) of the second eccentric stirring shaft (52) is 126 mm (600 mm x 0.21) or less, with the difference between the long and short lengths being 21.6 mm or less.Furthermore, for example, in the case of a pot (T) having 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 x 0.174) or less, and the spacing distance (D2) of the second eccentric stirring shaft (52) is 84 mm (400 mm x 0.21) or less, with the difference between the long and short lengths being 14.4 mm or less. Incidentally, in the pot (T) having the same diameter (inner diameter) of 400 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, approximately 31.25 mm (approximately 115 mm - approximately 83.75 mm), which is significantly different.

[0082] A planetary gear (64) is fitted integrally to the upper end of the first eccentric agitating shaft (51) and rotates in mesh with the fixed sun gear (60) on the fixed bearing case (53) of the center main shaft (2) so as to circumscribe the circumference of the planetary gear (64). The planetary gear (64) is a spur gear having a smaller diameter than the fixed sun gear (60). In the illustrated embodiment, the rotational (spinning) speed of the first eccentric agitating shaft (51) is fixed and predetermined by the gear ratio (revolution 1: rotation 2.2) of the meshed rotation of the two gears (60) and (64), and is, for example, 10 to 42 rpm.

[0083] Meanwhile, a DC brushless motor, which serves as a dedicated second drive source (auxiliary drive source for 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), so that the second eccentric stirring shaft (52) can rotate (spin on its own axis) independently of the center main shaft (2) and 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 through the hollow space between the center main shaft (2) and the slip ring (58).

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

[0085] In the illustrated embodiment, the rotation (autorotation) speed of the second eccentric stirring shaft (52) is, for example, 50 to 4000 rpm, and it can also rotate in the reverse direction. The rotation speed of the second drive source (DC brushless motor or AC geared motor) (47) for this purpose can be appropriately changed and adjusted by a rotation control motor driver (48) built into the stirring box (Ab).

[0086] In the illustrated embodiment, the first eccentric stirring shaft (51) has a rotational gear ratio of 2.2 times the revolution speed (revolution 1: rotation 2.2) between the fixed sun gear (60) and the planetary gear (64), and the second eccentric stirring shaft (52) is rotated at a speed four times the revolution speed (revolution 1: rotation 4) by a second drive source (47) that is separate and independent from the first drive source (3) at a higher speed than the first eccentric stirring shaft (51). However, the rotational speeds of these first and second eccentric stirring shafts (51) and (52) can be changed or adjusted depending on the various physical properties of the material to be treated, such as viscosity and hardness, the purpose of the treatment to be imparted to the material (various shapes of the required first and second stirrers), etc.

[0087] When the center main shaft (2) is driven to rotate in the direction of the arrow (F) in Figure 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) slowly revolve around the center main shaft (2) together in the same direction (F) via the rotating gear case (59) which rotates integrally with the center main shaft (2).

[0088] Simultaneously with this orbital motion, the first eccentric agitating shaft (51) rotates relatively quickly in the same direction (F) as the direction of the orbital motion (F) due to the meshing rotation of the planetary gear (64) at its upper end and the fixed sun gear (60). On the other hand, the second eccentric agitating shaft (52) rotates faster than the first eccentric agitating shaft (51) in the same direction (F) as the direction of the orbital motion (F) or the opposite direction (R) by the second drive source (47) (DC brushless motor or AC geared motor) at its upper end. By rotating the second drive source (47) forward or backward, the second eccentric agitating shaft (52) can selectively rotate in the same direction (F) as the direction of the orbital motion (F) or the opposite direction (R).

[0089] The first and second stirring bars (P1) (P2) attached to the lower ends of the first and second eccentric stirring shafts (51) (52) can be used together with the pot (T) that stores materials to be processed, such as food, cosmetics, chemicals, and industrial materials, and can perform stirring, whipping, mixing, cutting, crushing, emulsifying, dispersing, kneading, grinding, and other necessary processing on the materials to be processed.Various shapes such as blades according to the purpose of the processing, as well as wire whips, beaters, hooks, cutters, uneven toothed rotors (disk-shaped shearing blades), rotation resistance rods, and other products made of metal or high-strength synthetic resins can be used.

[0090] In this regard, Figures 10 to 18 show first to seventh use examples in which first and second agitators (P1) (P2) of various shapes are attached in a combined state, so to speak, to the first and second eccentric agitator shafts (51) (52). Of these, the first use example is cited as a representative example and briefly explained as follows: the mounting support shaft (68) of the first agitator (P1), which consists of a bottom blade as shown in Figure 10, is attached to the first eccentric agitator shaft (51), and the mounting support shaft (69) of the second agitator (P2), which consists of a three-stage cutter with top, middle and bottom sections, is attached to the second eccentric agitator shaft (52), both of which are detachably attached from below and can rotate together.

[0091] Furthermore, the first and second eccentric stirring shafts (51) and (52) have a difference in the distance (center-to-center distance) (D1) and (D2) from the center main shaft (2). As is clear from Figure 4, the rotational diameter (d1) of the first stirring bar (bottom blade) (P1) attached to the first eccentric stirring shaft (51) with the shorter distance (D1) is larger than the radius (r) of the pot (T), while the rotational diameter (d2) of the second stirring bar (cutter) (P2) attached to the second eccentric stirring shaft (52) with the longer distance (D2) is smaller than the rotational diameter (d1) of the first stirring bar (P1).

[0092] In this case, the rotational diameter (d2) of the second stirring bar (P2) may be smaller than the radius (r) of the pot (T), but as long as the first and second stirring bars (P1) (P2) can rotate independently without risking interference between their rotational trajectories, it is desirable to make the rotational diameter (d2) of the second stirring bar (P2) larger than the radius (r) of the pot (T).

[0093] In this way, the first and second stirring bars (P1) (P2) are stacked or interlocked with each other by a certain amount (W) as shown in Figure 10, and both rotate (spin) widely beyond the vertical center line (OO) of the pot (T), thereby enabling the stirring, cutting, crushing and other processing of the material to be processed near the center of the pot (T) to be carried out efficiently and without omissions.

[0094] In addition, the first stirring bar (P1) on the first eccentric stirring shaft (51) rotates in the same direction (F) as the revolution direction (F) of the center main shaft (2) by the first drive source (AC geared motor) (3), tracing an epicycloid curved motion trajectory as shown in Figures 11 and 12, and the material to be processed can be supplied by being pushed from the body wall (outside) of the pot (T) toward the center. This not only strengthens the heating power of the heating source (H) but also helps prevent the material from burning.

[0095] In contrast, the second stirring bar (P2) on the second eccentric stirring shaft (52) is driven by a second driving source (47) (DC brushless motor or AC geared motor) that is separate and independent from the first driving source (3) and can rotate in the same direction (F) as the first stirring bar (P1) on the first eccentric stirring shaft (51) as shown in Figure 12, as well as in the opposite direction (R). Since it is possible to select between the same direction (F) and the opposite direction (R), the second stirring bar (P2) can be rotated in the opposite direction (R) to the first stirring bar (P1) to trace a hypocycloid curved motion trajectory as shown in Figure 11, and the material to be processed that has been forced in and supplied from the first stirring bar (P1) can be pushed from near the center of the pot (T) toward the wall surface (outside) of the pot, where it can be stirred, cut, or crushed by hitting the wall surface of the pot (T).

[0096] FIG. 12 shows the overall rotational motion trajectory, which is a combination of the epicycloid curve, which is the rotational motion trajectory of the first stirring bar (P1), and the hypocycloid curve, which is the rotational motion trajectory of the second stirring bar (P2). FIG. 11 shows the overall rotational motion trajectory, which is a combination of the epicycloid curves drawn by both stirring bars (P1) and (P2), as the second stirring bar (P2) also rotates in the same direction (F) as the first stirring bar (P1). However, the second agitator bar (P2) on the second eccentric agitator shaft (52) overlaps the first agitator bar (P1) on the first eccentric agitator shaft (51) by the above-mentioned fixed amount (W), and is also designed to rotate (spin) faster than the first agitator bar (P1). Therefore, the speed difference in the spinning motion and the overlap amount (W) work together to efficiently perform the necessary agitation, cutting, grinding, mixing, and other processes on the material to be processed in an increasingly short amount of time. In the first example of use shown in Figure 10, it is desirable to set the rotation speed of the first eccentric agitator shaft (51) to 42 rpm or less, while setting the rotation speed of the second eccentric agitator shaft (52) to 100 rpm or more.

[0097] FIG. 10 shows a first example of use of the twin-shaft mixer according to the above embodiment of the present invention, which is suitable for mixing, cutting, and pulverizing jams, sauces, etc. However, as shown in the second example of use in FIG. 13, the first and second mixers (P1) (P2) each function as a three-stage cutter with upper, middle, and lower sections, and the cutters engage with each other by a certain amount (W) or overlap with each other, and due to the difference in the speed at which they rotate (spin) in this overlapping state, in addition to the effect expected in the first example of use, there is also an effect of removing materials to be processed that adhere to each cutter.

[0098] Furthermore, as shown in the third example of use in Figure 14, by adopting a disc-shaped shearing blade or a concave-convex rotor as the second agitator (P2) instead of the cutter in the first example of use and using it in combination with the bottom blade of the first agitator (P1), the material to be processed that has been forced into the center of the saucepan (T) from the bottom blade can be effectively sheared by the second agitator (P2) rotating (on its own axis) at a high speed, for example, of 100 rpm or more, and the agitation, dispersion, pulverization, and emulsification of the material based on this shearing can be promoted, which is suitable and beneficial for dressings, curry roux, fruit juice drinks, lotions, and other low-viscosity liquids.

[0099] In this case, as shown in the fourth example of use in Figure 15, it is particularly preferable to use two stages of downward and upward convection adjustment blades instead of the bottom blades used in the third example of use, and combine these with the disk-shaped shear blade or uneven toothed rotor of the second stirrer (P2) to quickly create fine convection in the low-viscosity liquid and promote emulsification. The combined use of the first and second stirrers (P1) and (P2) with different shapes is also useful for achieving a wide variety of processing effects.

[0100] As shown in the fifth example of use in Figure 16, when meringue, cream, or other ingredients are processed, the bottom blade of the first stirrer (P1) and the wire whipper (wire beater) of the second stirrer (P2) are used in combination. The rapidly rotating (self-spinning) wire whipper (wire beater) cuts into the egg white that has been forced in through the bottom blade, and smashes the egg white against the wall of the saucepan (T), allowing for efficient whipping in a short amount of time.

[0101] Furthermore, in the sixth and seventh usage examples in Figures 17 and 18, the first stirrer (P1) is a single-blade or round rod blade, and the second stirrer (P2) used in combination with it is a rotating resistor made of a round rod or conical wire with a rotation diameter (d2) smaller than the radius (r) of the saucepan (T), and the high-speed rotation (spin) of this resistor scrapes off the material to be processed that has adhered to the first stirrer (P1) so that it does not rotate around. This is useful for highly efficient processing such as stirring, mixing, kneading, and grinding of powders, pastes, and other highly viscous materials to be processed.

[0102] In any of the first to seventh use examples shown in Figures 10 to 18, as shown in Figures 2 and 4, a scraper (70) for scraping off the material adhering to the wall surface of the pot (T) is preferably attached to a mounting bracket (71) and suspended from the eccentric portion of the rotating gear case (59) of the stirring mechanism (A) toward the inside of the pot (T), and is also revolved slowly together with the first and second eccentric stirring shafts (51) and (52) by the first drive source (3) for rotating the center main shaft. In this case, it goes without saying that the scraper (70) suspends near the position where the first stirring bar (P1) and second stirring bar (P2) are adjacent to each other and does not interfere with the rotational (autorotational) motion trajectories of both stirring bars (P1) and (P2).

[0103] Furthermore, the symbol (S) in Figures 1 and 4 denotes a wireless transmitter corresponding to the wireless receiver (45) mentioned above, and this also hangs down from another eccentric part of the rotating gear case (59) in the stirring mechanism (A) via a sensor holder (72) to the inside of the saucepan (T) with its tip end at a temperature sensing part (contact type heating temperature sensor) (73) and therefore revolves together with the first and second eccentric stirring shafts (51) (52) and the first and second stirring bars (P1) (P2).

[0104] The wireless transmitter (S) is assembled into the overall shape of a syringe, consisting of a metal case (74) as shown in Figure 19, a nozzle (76) and a synthetic resin cap (77) that are screwed together at both ends of the opening via waterproof O-rings (75) so that they can be opened and closed freely, and a thin metal nose tube (78) that protrudes integrally from the center of the nozzle (76).A contact temperature sensor (73), such as a thermistor, resistance temperature foil, or thermocouple foil, is attached to the tip (lower end) of the nose tube (78), which will be inserted into the material to be treated in the saucepan (T).

[0105] Moreover, the housing 74 contains a circuit board 79 on which a microcomputer is mounted and a battery 80 for driving it, and the cap 77 contains a transmitting antenna 81. 82 is a transmission line connecting the temperature sensor 73 and the circuit board 79.

[0106] The current temperature data of the material to be processed detected by the temperature sensor (73) of the 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 receiver (45) outputs an electrical signal to turn off the high-frequency power supply (heating inverter) (35) of the heating source (electromagnetic induction heater in the illustrated embodiment) (H), automatically stopping the heating of the stockpot (T).

[0107] In any of the first to seventh use examples, the pot (T) can be heated to bring the material to the optimum temperature. However, depending on the type of material to be treated and the purpose of the treatment, the heat source (H) and heating temperature sensor (73) may not be used, and therefore a non-conductive pot (T) may be used to store the material to be treated. [Explanation of symbols]

[0108] (1)··················prop (2) Center spindle (3) First driving source (10) Pot holder arm (12) Back wall plate (15) Lift slider (17) Bearing plate (18) Nut (19) Rotating screw shaft (20) Lifting guide shaft (26) Lifting source (29a)(29b)(29c) 1st to 3rd proximity switches (30a)(30b) Position detection pin (45) Radio transmitter (46) Rotation control inverter (47) Second driving source (48) Rotation control motor driver (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) Planetary gear (66)...Feed line (67) Balance weight (A) Stirring mechanism (Ab) Stirring box (d1) Rotation diameter of the first stirring bar (d2) Rotation diameter of the second stirring bar (D1) Spacing distance of the first eccentric stirring shaft (D2) Spacing distance of the second eccentric stirring shaft (H)... Heating source (Hb) Heating box (L) Lifting mechanism (M) Mixer body frame (P1) First stirring bar (P2) Second stirring bar (r) Radius of the pot (T)...Sundo pot (W) Overlap amount

Claims

1. a pot (T) having a substantially flat bottom surface for accommodating the material to be treated; A heating box (Hb) containing a heating source (H) located directly below the stockpot (T), a stirring box (Ab) fixedly supported by a support (1) of the mixer body frame (M) so as to face a position directly above the stockpot (T); A center main shaft (2) suspended from the stirring box (Ab) toward the center of the pot (T), a first drive source (3) for rotating the center main shaft, which is built into the stirring box (Ab); a rotary gear case (59) that is rotated integrally with the center main shaft (2) by the first drive source (3); The rotating gear case (59) is provided with first and second eccentric stirring shafts (51) and (52) which hang down parallel to the central main shaft (2) from the rotating gear case (59) toward an eccentric portion in the pot (T) and are journaled in the rotating gear case (59) so as to be rotatable about their own axes. The distance (D1) between the first eccentric stirring shaft (51) and the center main shaft (2) is set to a relatively short dimension, and the first stirring bar (P1) is connected to the lower end of the first eccentric stirring shaft (51) so as to be rotatable integrally therewith. The second eccentric stirring shaft (52) has a relatively long distance (D2) from the center main shaft (2), and the second stirring bar (P2) is connected to the lower end of the second eccentric stirring shaft (52) so as to rotate integrally with the second stirring bar (P2). When the center main shaft (2) is rotationally driven by the first drive source (3), the first and second eccentric stirring shafts (51) and (52) revolve around the center main shaft (2) in the same direction (F) via the rotary gear case (59) which rotates integrally with the center main shaft (2). At the same time, In a vertical twin-shaft mixer, the first stirring bar (P1) on the first eccentric stirring shaft (51) and the second stirring bar (P2) on the second eccentric stirring shaft (52) are set so as to rotate independently without interfering with each other on their rotational motion trajectories, The rotation diameter (d1) of the first stirring bar (P1) is set to a dimension larger than the radius (r) of the pot (T), and the first eccentric stirring shaft (51) is rotated by the first drive source (3) in the same direction (F) as the direction (F) of revolution, so that the first stirring bar (P1) traces a motion locus of an epicycloid curve, The vertical twin-shaft mixer is characterized in that the rotation diameter (d2) of the second agitator (P2) is set to a dimension smaller than the radius (r) of the cylindrical pot (T) or a dimension larger than the radius (r) of the cylindrical pot (T) but smaller than the rotation diameter (d1) of the first agitator (P1), and the second agitator (P2) is rotated by a dedicated second drive source (47) separately and independently attached to the upper end of the second eccentric agitator shaft (52) in the same direction (F) as the first agitator (P1) or in the opposite direction (R) at a higher speed than the first agitator (P1), so that the second agitator (P2) traces a motion locus 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) that is exposed from a fixed bearing case (53) that rotatably supports the center main shaft (2), and the first and second eccentric stirring shafts (51) and (52) are supported by the rotating gear case (59) so that they can rotate on their own axes. The planetary gear (64) fitted integrally to the upper end of the first eccentric stirring shaft (51) is meshed with the fixed sun gear (60) fitted integrally to the fixed bearing case (53) at a corresponding height position in a state of circumscribing the planetary gear (64), 2. The vertical twin-shaft mixer according to claim 1, wherein a DC brushless motor or an AC geared motor serving as a dedicated second drive source (47) for the second eccentric agitating shaft (52) is integrally connected to an upper end of the second eccentric agitating shaft (52), the second drive source (47) being separate from an AC geared motor serving as a first drive source (3) for rotating the center main shaft.

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

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 routed 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, wherein not only a planetary gear (64) having a smaller diameter than the fixed sun gear (60) but also a balance weight (67) is attached to the upper end of the first eccentric agitating shaft (51) from above the planetary gear (64) in order to maintain a weight balance around the central main shaft (2) with the second eccentric agitating shaft (52) having the second drive source (47) integrally connected to its upper end.

5. 3. The vertical twin-shaft mixer according to claim 1, wherein the rotation speed of the first eccentric agitating shaft (51) rotating about its own axis in the same direction (F) as the direction (F) of revolution of the first eccentric agitating shaft (51) via the center shaft (2) and the rotating gear case (59) by the AC geared motor serving as the first drive source (3) for rotating the center shaft can be changed and adjusted by the rotation control inverter (46).

6. 3. The vertical twin-shaft mixer according to claim 1, wherein the rotation speed of the second eccentric agitator shaft (52) rotating in the same direction (F) as the revolution direction (F) or the opposite direction (R) by the DC brushless motor or AC geared motor serving as the second drive source (47) for rotating the second eccentric agitator shaft can be changed and adjusted by the rotation control motor driver (48).

7. A scraper (70) that comes into contact with the wall surface of the pot (T) to scrape off the material to be treated, and a contact-type temperature sensor (73) for the material to be treated, which is the temperature-sensing part of the wireless transmitter (S), are respectively suspended from the eccentric part of the rotating gear case (59) that revolves integrally with the center main shaft (2) toward the inside of the pot (T).

3. The vertical twin-shaft mixer according to claim 1, wherein the radio transmitter (S) and the corresponding radio receiver (45) are installed inside the mixing box (Ab).

8. A rear wall plate (12) is hung down integrally from the rear end of a pot support arm (10) that suspends a pot (T) at a mid-height position on a support (1), A lifting slider (15) that can move up and down along a pair of lifting guide shafts (20) that are erected parallel to the support (1) is integrally extended rearward from the back wall plate (12) of the pot receiving arm (10), The nut (18) attached and integrated to the horizontal bearing plate (17) of the lift slider (15) is screwed and fastened to the rotating screw shaft (19) standing vertically between the two lift guide shafts (20), A vertical twin-shaft mixer as claimed in claim 1 or 2, characterized in that when the rotating screw shaft (19) is rotated from above by a geared motor (26) for lifting operation, the lifting slider (15) on the pot receiving arm (10) side only moves up and down along its lifting guide shaft (20).

9. In addition to the first proximity switch (29a) that detects the upper limit position of the lift slider (15) and the second proximity switch (29b) that detects the lower limit position, a third proximity switch (29c) that detects the fixed position is also provided.

9. The vertical twin-shaft mixer according to claim 8, wherein the mixer is set not to operate unless both the first proximity switch (29a) and the third proximity switch (29c) output detection signals.

10. A method for using the vertical twin-shaft mixer according to claim 1, wherein the first stirring bar (P1) having a rotation diameter (d1) larger than the radius (r) of the cylindrical pot (T) is used as a bottom blade for preventing the material from burning due to heating, Similarly, a second stirring bar (P2) having a rotation diameter (d2) larger than the radius (r) of the pot (T) but smaller than the rotation diameter (d1) of the first stirring bar (P1) is used as a cutter for shearing the material to be treated or a concave-convex tooth rotor, The first and second stirring bars (P1) (P2) are kept in an overlapping state in which they are stacked or interlocked by a certain amount (W) near the vertical center line (O-O) of the saucepan (T), Moreover, during the revolution of the first agitator (P1) by the first drive source (3) of the first and second agitators (P1) (P2), the second agitator (P2) is rotated by a second drive source (47) independent of the first drive source (3) in the same direction (F) as the first agitator (P1) or in the opposite direction (R) at a higher speed than the first agitator (P1), thereby promoting agitation, pulverization and emulsification based on shearing of the material to be processed.

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