JP3616345B2 - Desktop rice mill with rice washing function - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a table rice mill of the type that stirs and convects brown rice, and, in particular, has a simple structure, and is a table rice mill with a rice washing function capable of generating rice-free rice by polishing (rice washing) after rice polishing. About.
[0002]
[Prior art]
The unpolished rice before milling consists of endosperm, umami layer, skin folds, and rice bran from inside. After that, the remaining skin folds will be washed off with water. On the other hand, instead of washing the milled white rice with water, the ones with the skin peeled off by a special method are distributed as non-washed rice.
[0003]
When the polished white rice is melted with water, vitamin B1 and the like which are well soluble in water will flow into the soup, and the taste such as umami and sweetness will be reduced. In addition, when squeezed with water, the soup contains phosphorus, nitrogen, fats, etc., and if it flows into rivers as domestic wastewater, it causes sludge and red tide, causing environmental destruction. Wash-free rice has the advantage that since no tomato juice is generated, it is possible to prevent the outflow of vitamin B1 and the like, so that a large amount of umami and sweet ingredients can remain and there is no concern about environmental pollution.
[0004]
Conventionally, as an apparatus for washing rice after milling, there are a washing-free rice production apparatus, a rice sharpening machine, and a machine for sharpening (washing rice) with a sharpening machine, for example, JP-A 64-63051, Japanese Utility Model Sho 62- 59138 and the like. In addition, a rice mill that performs from rice milling to rice washing is known, but the method is a roll type, folding screen type, vacuum type, etc., and it is not a desktop type but large and expensive. In addition, a brush-type rice washer that writes the surface of rice grains with centrifugal force and a brush without using water is commercially available, but it is not a desktop type but is large and expensive, as well as cracked rice and cracks in rice. The rate is high.
[0005]
On the other hand, as an agitated convection type table rice mill, JP 2000-218183 discloses an addition of a function of polishing white rice whose surface has been oxidized and turned yellow, but its purpose is different from that of washed rice. Moreover, although this white rice polishing is described that the rotational speed of the milled rice blades is lower than that at the time of milling, crushed rice and cracking of the rice are inevitable. In addition, as another table mill for agitated convection type, Japanese Patent Laid-Open No. 2001-46891 describes that after rice milling, the rice is washed with a variable rotational speed or the like. In the same way as above, broken rice and cracking of the rice are inevitable. When broken rice or cracks occur in the rice during washing, the rice cakes and garbage tend to adhere to the cracks or cracks, and these cannot be removed sufficiently during the washing, leading to a decrease in taste. In addition, in order to reduce the incidence of cracked rice and cracks in rice, it is necessary to set the rotational speed of the rice milling blades to a lower rotational speed than the time of rice polishing or to shorten the washing time. It is not done, and the cocoon cannot be removed satisfactorily.
[0006]
[Problems to be solved by the invention]
As described above, none of the stirring convection type table rice mills can perform satisfactory rice washing (rice washing) to produce satisfactory washing-free rice.
Here, washed rice refers to removing skin wrinkles, splinters and garbage from polished rice after milling as shown in FIG. Here, (a) of FIG. 1 shows brown rice, (b) shows white rice after polished rice, and (c) shows rice after washed rice. In addition, in the case of parted rice, it means that the pieces and dust adhering to the surface of the rice after completion of desired parting are removed. As shown in FIGS. 1 (a) and 1 (b), the white “rice cake” is removed from the white rice after milling, and when this is melted with water, as shown in FIG. 1 (c). The remaining “skin” also falls. In addition, as shown in FIG. 1 (c), commercially available non-washed rice has both “wrinkles” and “skin wrinkles” removed by a special method, and does not need to be washed with water at all.
[0007]
In such a rice-washing operation, if the rice is not washed sufficiently, splinters or the like may remain attached to the rice, and if the rice is washed excessively, cracked rice or cracks may occur in the rice. If rice grains or skin pieces remain attached to the rice, the taste will deteriorate. In addition, when the cracked rice rate is high, the cooked rice has a sticky taste, and when cracks occur, the cracks are clogged with flakes, dust, and the like. Here, the broken rice rate is the ratio of the weight of the broken rice to the total weight of the rice after the washing.
[0008]
By the way, the inventors of the present application pay attention to the change in the moisture content of rice at the time of rice milling, and the moisture content decreases as rice milling progresses, and if the moisture content decreases too much, cracks, chips, cracks, etc. of the rice occur. It has been found that the rate of occurrence of cracks, cracks, cracks, etc. of rice is high when the moisture content is less than about 12.5%. On the other hand, if the moisture content is about 14% or more in order to reduce the incidence of cracks, chips, cracks, etc., the rice is not sufficiently removed from the rice and the washed rice is immersed in water. The turbidity of water increases. Here, turbidity means the transparency of water after the rice after washing is soaked in water, and its unit is NTU. 1 NTU is about 0.7 degrees. In addition, the measuring method of turbidity in this invention is mentioned later.
Therefore, the inventors of the present application have proposed to provide a rice washing mode in which a rice-sharpening (rice washing) is performed by rotating the rice milling blades using the same rice milling blades after the rice milling in a stirring convection type table rice mill. In the rice washing mode, in order to prevent the occurrence of the phenomenon such as cracking, chipping and cracking of the rice as described above, and to sufficiently reduce the turbidity when the rice is immersed in water, In the range of about 12.5% to about 13.5%, for that purpose, at least two of the control elements of the rice washing operation such as the shape, rotation speed, and rotation time of the rice milling blades are set to an appropriate range. The inventors have recognized for the first time that there is a need to do so.
[0009]
Accordingly, an object of the present invention is to provide a table rice mill capable of appropriately washing rice in a stirring convection type table rice mill.
Another object of the present invention is to provide a desktop rice mill with a simple configuration and easy maintenance that can perform sufficient washing of rice with a low rice cracking rate and crack rate in a stirred convection type table rice mill.
[0010]
[Means for Solving the Problems]
In order to achieve such an object, a desktop rice mill according to the present invention includes a rice milling blade that is detachably fitted to a drive shaft and provided on a member that rotates with the drive shaft, and that rotates with the drive shaft. A blade assembly, a polished rice basket that detachably accommodates the polished rice blades, and a cocoon box that detachably accommodates the polished rice basket, and a side periphery of the polished rice basket is formed of a wire mesh, and brown rice is By rotating the drive shaft in the polished rice basket, the brown rice is agitated by the rotation of the polished rice blades, and the brown rice is rubbed into the wire mesh of the polished rice basket by the centrifugal force, and the straw is scraped off and scraped. In the table rice mill, the dropped rice cake is blown outward from the mesh by centrifugal force and dropped into the rice cake box. The rice was washed at a rotational speed corresponding to the low amount of the rice so that the water content of the rice after washing was substantially within the range of 12.5% to 13.5%. Is. Here, the rice after milling may be commercially available milled rice, but preferably rice that has been milled with the table mill of the present invention.
[0011]
Further, the table rice mill according to the present invention increases the rotation speed according to the increase in the amount of rice at the time of washing the rice, and the difference between the rotation speed at the time of rice polishing and the rotation speed at the time of washing the rice increases the amount of rice. It is made small according to.
Further, the table rice mill according to the present invention includes a control unit that controls a motor that drives the drive shaft, and the control unit performs a rice washing mode that performs a rice washing operation, a rice milling mode that performs a rice milling operation, a rice milling operation, and a rice washing operation. And a rice milling / rice washing mode for continuously performing the process.
[0012]
In the table rice mill configured in this way, it is possible to wash the rice at a low rate of crushed rice. Therefore, it is possible to sufficiently remove the koji from the rice and to prevent deterioration in taste and stickiness. Moreover, it is very convenient that the rice washing can be performed continuously and automatically as it is after the rice polishing, or the rice washing mode can be selectively executed again after the rice polishing. In addition, since the same blades can be used for the polished rice and the washed rice, there is no need to replace the blade for the washing operation. Therefore, the automatic continuous operation from the polished rice to the washed rice is performed, or the washed rice is left as it is after the polished rice. The rice washing operation can be executed by the start instruction means (for example, the rice milling / rice washing button), and a table rice mill with a rice washing function can be realized with a simple configuration and extremely easy maintenance.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Below, the basic composition of the Example of the table rice mill with the rice-washing function by this invention is demonstrated with reference to FIGS.
2 and 3 are external views of the entire tabletop rice mill of the present embodiment, FIG. 2 is a top view, and FIG. 3 is a perspective view. 2 and 3, reference numeral 50 denotes the table rice mill, 11 is a main body case made of, for example, ABS resin, 14 is also a bottom cover made of, for example, ABS resin, and 15 is a rubber foot attached to the bottom of the bottom cover 14. It is. Reference numeral 3 denotes a lid, for example, an outer frame 4a made of ABS resin, an inner frame 4b (see the sectional view of FIG. 4), a handle 1 made of ABS resin, for example, attached to the frames 4a and 4b, and frames 4a and 4b. It has a transparent window 2 made of sandwiched glass or acrylic resin. Reference numeral 27 is a power cord, and 28 is a power plug.
[0014]
7 is an example of the configuration of an operation panel (operation unit) for instructing various operations of the table-top rice mill. In order to instruct the start and stop (start / stop) of the rice milling operation and / or the rice washing operation, as shown in FIG. Rice polishing / rice washing button (rice polishing / rice washing instruction section or rice polishing / rice washing instruction means) 70, germ mode button (germ mode setting section or embryo mode setting means) 71 for setting the germ mode for performing the rice leaving the germ , That is, a milling degree setting button (milling degree setting section or milling degree setting means) 72 for setting the degree of milling, a rice milling amount / rice washing setting button for setting the amount of milled rice (for example, 1-5) (Rice milling amount / Rice washing amount setting section or Rice milling amount / Rice washing amount setting means) 73, Display unit 74 for displaying the degree of milling set by the button 72 and / or the rice milling amount set by the button 73, washing the rice Rice washing mode button (rice washing mode instruction section or rice washing mode instruction means) 75 for instructing rice mode, rice milling / rice washing mode button for instructing rice polishing / rice washing mode for continuously performing rice washing and rice washing (rice polishing / rice washing mode instruction section or rice polishing) / Rice-washing mode instruction means) 76, a re-milling button (re-milling instruction section or re-milling instruction means) 78 used to instruct re-milling after rice polishing, and a re-washing button to be used to instruct re-washing after rice washing (Re-washing rice instruction section or re-washing rice instruction means) 79.
[0015]
FIG. 4 is a cross-sectional view of the desktop rice mill along line IV-IV in FIG. 2, and FIG. 5 is an exploded view of the main part of the desktop rice mill. 4 and 5, 5 is a cylindrical rice mill that accommodates brown rice, particularly a cylindrical (sleeve) rice, 9 is a rice milling blade assembly that mills brown rice in the rice mill 5 by rotating, and 6 is a rice mill 5. For example, a cylindrical (sleeve) -shaped cocoon box made of ABS resin, which accommodates the rice cake that has been scraped off from the brown rice by the polished rice basket 5, and 30 is a cylindrical (sleeve) -shaped material made of, for example, ABS resin, which contains the cocoon box 6 When the upper end portion 30 a and the bottom opening end 30 b are fixed to the main body case 11, the eaves box storage case 30 is fixed to the main body case 11.
[0016]
Reference numeral 8 denotes a control circuit box that accommodates a control circuit (not shown) of the table rice mill. The control circuit uses the power plug 28 of the power cord 27 (FIG. 3) accommodated in the cord reel assembly 26 as an AC power source. Power is supplied by connecting. 10 is a motor controlled by a control circuit, 10a is a motor drive shaft that rotates as the motor 10 rotates, 12 is a motor pulley that is fixed to the motor drive shaft 10a and rotates with the motor drive shaft, and 13 is a motor pulley 12 and a drive pulley. 25 is a drive belt that is wound around the motor 25 and transmits the rotation of the motor drive shaft 10a to the drive pulley 25. The drive pulley 25 is fixed to the lower end portion of the drive shaft 23a, and the drive shaft 23a also rotates as the motor 10 rotates. The upper end portion of the drive shaft 23a is coupled to the lower end portion of the main body 16b of the hexagonal shaft assembly 16 via, for example, a polyacetal rotating disk 20 and a coupling 19 made of, for example, a rubber-based material, and rotates the drive shaft 23a. Accordingly, the hexagon shaft assembly 16 is also rotated. In FIG. 5, the drive shaft 23a, the turntable 20 and the coupling 19 are omitted, and the turntable 20 and the coupling 19 are well known. Here, the hexagonal shaft assembly 16, the main body 16b, and the tip 16a shown in FIGS. 4, 5, and 8 constitute a drive shaft (rice milling blade drive shaft) 23b.
[0017]
The drive shaft 23a passes through the opening 24a of the main body frame 24 and the bottom opening of the bag box housing case 30, and between the drive shaft 23a and the opening 24a of the main body frame 24 and between the drive shaft 23a and the bag box housing case. Bearings 21 are provided between the bottom opening 30 and the bearings 21 are accommodated in a bearing case 22. A lower end portion of the bearing case 22 is fixed to the main body frame 24 by screws 32. The main body frame 24 is fixed to the main body case 11. The motor 10 is mounted and fixed on the main body frame 24.
[0018]
Next, the structure of the rice milling blade assembly 9, the rice milling basket 5, the rice bran box 6, the hexagonal shaft assembly 16, and the like will be described with reference to FIGS. The main body 16b of the hexagonal shaft assembly 16 has a cylindrical shape, is integrally formed of, for example, stainless steel, and is received by a metal cylindrical sleeve metal 17 that is a bearing of the hexagonal shaft assembly. 17 is accommodated in a metal case 18 made of stainless steel, for example. The lower end portion of the main body 16b is fixed to the coupling 19 with screws. The sleeve metal 17 and the metal case 18 are press-fitted and fixed to the inner peripheral portion of the hollow protruding portion 5 g of the polished rice basket 5. An adjustment washer 34 is provided under the sleeve metal 17 to adjust the degree of meshing between the coupling 19 and the turntable 20. The distal end portion 16a of the hexagonal shaft assembly 16 is coated with a resin (for example, polyacetal), has a polygonal column shape, for example, a hexagonal column shape, and is tightly fitted to a hexagonal bearing portion 9c of the rice milling blade assembly 9 described later. Accordingly, the milled blade assembly 9 is rotated with the rotation of the hexagonal shaft assembly 16.
[0019]
The eaves box 6 comprises a circular upper frame 6a, a cylindrical, particularly cylindrical side peripheral portion 6i, and a circular bottom frame 6f. The bottom frame 6f is provided with a cylindrical hollow protrusion 6g. As described above, the coupling 19 and the turntable 20 are accommodated in the portion 6h. The upper frame 6a has an upper frame flange 6b protruding outward and a plurality of (for example, two) upper frame protrusions 6c protruding inward. The peripheral edge of the upper frame flange 6b is It is received and supported by the upper surface of the upper flange 30 c of the box housing case 30. Thus, the cocoon box 6 is detachably accommodated in the cocoon box housing case 30.
[0020]
The polished rice basket 5 includes a circular upper frame 5d, a circular bottom frame 5b, a plurality of vertical frames 5c connecting the upper frame and the bottom frame, and a cylindrical upper surface side hollow provided on the upper surface side of the bottom frame. It has a projecting portion 5g and a cylindrical lower projecting side hollow projecting portion 5i provided on the lower surface side, and these are made of, for example, ABS resin. Further, a wire mesh 5a is stretched between the vertical frames 5c. The vertical frame 5c and the bottom frame 5b are not essential and may be omitted. Further, the wire mesh 5a does not have to reach the bottom of the car. As another example, the wire mesh 5a may reach from the bottom of the car to the lower hollow projection 5i. Expanded metal may be used as the wire mesh. The inner diameter of the lower surface side hollow protrusion portion 5i is substantially the same as or slightly larger than the outer diameter of the hollow protrusion portion 6g of the saddle box 6, and the hollow protrusion portion 6g is loosely fitted into the hollow portion of the lower surface side hollow protrusion portion 5i. At this time, since the inner diameter of the upper surface side hollow protrusion 5g is smaller than the inner diameter of the hollow protrusion 6g, the polished rice basket 5 is placed on the upper end of the hollow protrusion 6g of the paddle box 6. As described above, the sleeve metal 17 and the metal case 18 are press-fitted and fixed to the inner peripheral portion of the upper-surface-side hollow protruding portion 5g, and the hexagonal shaft assembly 16 is passed therethrough. The upper frame 5d has an upper frame flange 5e protruding outward and a plurality of (for example, two) cutout portions 5f provided at positions corresponding to the upper frame convex portion 6c of the saddle box 6. The shape of the cutout portion 5f Is the same as the upper frame convex portion 6c. The peripheral edge of the upper frame flange 5e is received and supported by the upper surface of the upper frame flange 6b of the saddle box 6 as shown in FIG. Further, at this time, the upper frame convex portion 6c of the saddle box 6 is fitted with the notch portion 5f. Thus, the polished rice basket 5 is accommodated in the rice bran box 6 in a detachable and fixed state.
[0021]
As shown in FIGS. 5 and 7, the mesh shape and size of the metal mesh 5a are as follows. As shown in FIG. 7, the shape is a long rhombus or a long rhombus. As will be described later, brown rice is put into the rice basket at the time of rice polishing and the drive shaft is rotated so that the rice is stirred by the rotation of the rice milling blades 9a, and the brown rice is rubbed against the wire mesh of the rice basket 5 by the centrifugal force. However, the wrinkles are scraped off by moving obliquely upward along the wire mesh as shown by the arrows in FIG. The size of the rhombus is such that the length SW in the short direction is preferably about 2.2-3.0 mm so that the rice does not jump out of the mesh of the wire mesh and does not enter the mesh. Is between about 2.8-4.6 mm, for example, (SW: LW) = (2.2 mm: 3.0 mm) or (2.5 mm: 3.5 mm) or (3.0 mm: 4.6 mm). The mesh shape of the wire mesh may be a quadrangle (rectangle or square), in which case the length of one side in the vertical and horizontal directions is in the range of about 2.0 to 3.0 mm. In addition, the mesh shape may be circular, in which case the diameter is in the range of about 1.3-3.0 mm. In either case, the thickness and width of the metal mesh are both about 0.4 to 0.6 mm, for example.
[0022]
The rice milling blade assembly 9 includes, for example, a cylindrical boss made of PP resin (that is, a member that is detachably fitted to the drive shaft and rotates together with the drive shaft) 9b, and a cylindrical multi-piece made of PP resin, for example. It has a prismatic bearing portion, for example, a hexagonal bearing portion 9c, and a plurality (for example, two) of rice milling blades 9a made of stainless steel or PP resin and fixed to the boss 9b. When the blade 9a is made of PP resin, it is integrally formed with the boss 9b. As shown in FIG. 6, the blade 9a is inclined with respect to the bottom surface of the boss 9b or the bottom surface of the polished rice basket, and the angle α is preferably in the range of about 5-35 degrees. Note that this angle is not necessarily limited. As will be described later, for example, the angle may be perpendicular to the bottom surface of the polished rice basket, or may extend substantially parallel to the bottom surface of the polished rice basket and The rice grains may be partly or vertically erected, in short, the rice grains can be effectively stirred, and moved diagonally upward along the wire mesh while being rubbed against the wire mesh of the polished rice basket 5 by centrifugal force. Any form that can be sequentially circulated is acceptable. The hollow portion 9d of the boss 9b receives and accommodates the upper surface side hollow protrusion 5g of the polished rice basket 5. The hollow portion 9e of the hexagonal bearing portion 9c has a hexagonal column shape, and can be fitted tightly at the distal end portion 16a of the hexagonal shaft assembly 16. Thereby, the rice milling blade assembly 9 is detachably fitted to the distal end portion 16 a of the hexagonal shaft assembly 16, and is rotated as the motor 10 rotates. Note that the shapes of the distal end portion 16a of the hexagonal shaft assembly 16 and the hollow portion 9e of the hexagonal bearing portion 9c are not limited to the hexagonal column shape, and may be a triangular column shape, a quadrangular column shape, a pentagonal column shape, or the like.
[0023]
Next, the operation of the desktop rice mill 50 will be briefly described with reference to FIG. First, the rice bran box 6 is housed in the rice bran box housing case 30, the rice mill basket 5 is further housed in the rice bran box 6, and the rice milling blade assembly 9 is fitted to the hexagonal shaft assembly 16, so that a desired amount of brown rice is obtained. 40 is put in the polished rice basket 5 and the lid 3 is closed. Next, the power plug 28 is inserted into the outlet, the milling degree (division) is set by the milling degree setting button 72, the rice milling quantity is set by the milling rice / rice washing setting button 73, and then the rice milling / rice washing button 70 is pressed. Then, the motor 10 rotates at a rotational speed corresponding to the set milling degree and the amount of polished rice, and the polished rice blade assembly 9 rotates. Then, the brown rice 40 is agitated by the rotation of the milled rice blades 9a, and the brown rice is rubbed against the mesh of the wire mesh 5a of the milled rice basket 5 by the centrifugal force, and the straw is scraped off. Further, the scraped ridge 41 is blown outward from the mesh by centrifugal force and dropped into the ridge box 6. The brown rice pushed outward with respect to the wire mesh 5a of the polished rice basket 5 moves inward in the radial direction, and extends to the vicinity of the upper end of the polished rice basket 5 as shown in FIGS. Rice milling is performed by successively repeating the trajectory of flowing down along the shaft portion formed by the boss 9b and the hexagonal bearing portion 9c. Since such brown rice convection occurs, the brown rice circulates in the polished rice basket as shown in FIG. 8 so that the brown rice in the polished rice basket is uniformly polished as a whole, resulting in uneven rice polishing or whitening. There is no inconvenience that the degree is not uniform. When the motor 10 rotates for a time corresponding to the set milling degree and the amount of milled rice, the rotation ends and the milling of the desired milling degree is completed. In addition, since the whitening state of brown rice can be seen through the transparent window 2 of the lid 3, the rice milling is stopped by pressing the rice milling / rice washing button 70 at an appropriate time during the rice polishing so as to obtain a desired degree of whitening. You can also If it is determined that the milling is necessary to further increase the degree of milling after such milling, the milling is performed again by pressing the remilling button 78 or the milling degree setting button 72 and the milling / washing amount setting button 73 again. The rice milling may be performed again to obtain a desired milling degree. In this way, rice bran can be reliably and easily separated from brown rice, and rice having a desired milling degree can be obtained.
After the milling, the lid 3 is removed, and the milled blade assembly 9 is further removed from the hexagonal shaft assembly 16, and the milled rice basket 5 is removed, and the milled rice in the polished rice basket 5 is removed. At this time, the rice in the polished rice basket 5 can be left as it is and washed with water. Further, the basket box 6 is taken out and the basket inside it is taken out.
[0024]
Thus, according to this rice mill, the rice cake is blown off because the rice cake is blown from the mesh of the wire mesh 5a by the centrifugal force of rice. Therefore, since the basket is deposited in the basket box 6, the wire mesh 5 a can be easily cleaned, and the basket can be easily discarded from the basket box 6. Further, since there is a shaft portion formed by the cylindrical boss 9b and the hexagonal bearing portion 9c extending to the vicinity of the upper end of the polished rice basket 5, the uniform convection of rice as described above occurs, and the shape of the cage and the amount of polished rice are as follows. Irrespective of whether or not rice milling unevenness occurs. In addition, since the shaft portion extends to the vicinity of the upper end portion of the polished rice basket 5, the rice mill blades can be easily attached and detached. In addition, when the rice is agitated by the rotation of the milled rice blades 9a, wind is generated by the milled rice blades 9a, so that an increase in the temperature of the rice can be prevented and a decrease in taste can be prevented. Further, since there is no milling roll or milling cylinder as in a conventionally known rice mill, maintenance is extremely easy without worrying about rice clogging. That is, the straw hardly adheres to the wire mesh 5a of the polished rice basket 5, and even if it is attached, the polished rice basket 5 may be taken out and cleaned, which is extremely easy. Similarly, the basket in the basket box 6 can be easily cleaned by removing the basket box 6. Further, since the whitening degree can be easily grasped from the window 2 of the lid 3, the whitening degree can be easily adjusted. For this reason, it is easy to adjust the milling degree according to the difference in the type of brown rice and the water content, and it is possible to prevent rice cracking and chipping due to excessive milling. Furthermore, since the rice mill does not have a rice mill roll or a white mill, it can be miniaturized and can have a weight of about 3 kilograms. Therefore, the rice mill can be placed in a narrow kitchen area and can be a desktop type.
[0025]
By the way, in the rice milling blade assembly 9 described above, the rice milling blade 9a extends from the boss 9b in a substantially right angle direction, and the rice milling blade 9a is exposed from the root part to the tip part. When the rice that has been stirred and blown outward by centrifugal force and gradually raised falls to the inside, the rice may hit the milled rice blades 9a, and the rice may jump, causing broken rice and broken rice. For example, when the amount of polished rice becomes 3 go or less, an air space (space part) without rice is generated around the shaft (bosses 9b, 9c) due to centrifugal force, the rice that has risen in this space part descends, and the root of the boss 9b It hits the milled rice blade 9a in the vicinity of the portion, and the rice milled blade 9a is scattered by the action of the milled rice blade 9a and is struck against the lid 3 or the wire net 5a, and may cause broken rice or broken rice.
Therefore, in order to prevent such a phenomenon, the rice milling blade assembly covers the upper part of the root part of the rice milling blade and exposes only the tip part of the rice milling blade (for example, a shielding device concentric with the drive shaft (for example, And a disk attached to the boss). Below, the example of the rice milling blade assembly provided with such a shielding apparatus is demonstrated.
[0026]
FIG. 9 shows a first modified example 90 of the rice milling blade assembly. FIG. 9 (a) is a perspective view and FIG. 9 (b) is a side view. The rice milling blade assembly 90 is employed in place of the rice milling blade assembly 9 described above. The polished rice blade assembly 90 includes a boss 90c, a bearing portion 90a extending upward from the boss 90c, a shoulder portion 90b provided between the boss 90c and the bearing portion 90a, and a polished rice blade attached to the boss 90c. 9a. In this case, the boss 90c indicates a portion where the milled rice blades 9a are attached, and the shoulder 90b may be omitted or slightly provided. The bearing 90a and the boss 90c are substantially the same. The diameter may be used. The boss 90c is provided with a shielding device concentric with the drive shaft (see the hexagonal shaft assembly 16 in FIG. 4) so as to cover the upper portion of the blade portion of the rice milling blade 9a and expose only the tip portion of the rice milling blade 9a. A disk 51 is provided. The disc 51 may be formed integrally with the boss 90c, or may be made separately and bonded to the boss 90c. Since this disc 51 is provided, even when the rice that has risen by the milled rice blades 9a falls into the rice air space (space part) around the axis caused by centrifugal force, this rice is directly removed from the milled rice blades. It does not hit 9a, but hits the upper surface of the disk 51. Therefore, the rice will not jump.
[0027]
The diameter D1 of the disk 51 is determined in consideration of the above-described rice airspace, that is, the space portion. For example, in a rice mill with a 4-milling amount of polished rice, the diameter D1 is set to about 78 to 80 mm. In a rice mill with a rice milling amount of 6 go, it is appropriate that the diameter D1 is about 75 mm. Further, the diameter (length) D2 of the rice milling blades 9a is, for example, about 115 mm in a rice mill having a polished rice amount of 4 go, and about 128 mm in a rice mill having a polished rice amount of 6 go. The milled rice blade assembly 90 is made of, for example, PP resin, and the disk 51 is, for example, a PP resin disk having a thickness G1 of about 3.5 mm. The gap G2 between the disk 51 and the rice milling blades 9a may not be present, but may be about 2.5 mm or less in consideration of a case where a conventional boss is provided. In addition, the magnitude | size (diameter) of a circular-shaped shielding apparatus can be increased by bending a part of blade | wing and enlarging stirring force, for example. That is, it may be designed as appropriate depending on the motor power, the size of the polished rice basket and the shape of the blades. Moreover, the shape does not necessarily need to be a disk shape. However, if there is an acute angle portion, broken rice is generated at the surface portion, and therefore it is desirable to have a smooth curved circumference.
[0028]
FIG. 10 is a side view of a second modification 91 of the rice milling blade assembly. In this modification, the substantially disk-shaped member 91c constituting the shielding device is formed integrally with the boss, and the root portion of the rice milling blade 9a is completely buried in the substantially disk-shaped member 91c. Only the tip portion of the milled rice blade is exposed from the outer peripheral portion of the substantially disk-shaped member 91c. The broken line shown by the reference numeral 91b shows the shape of a well-known boss per se. Of course, the disk-like member 91c of the present invention can be integrally formed with such a boss. The diameter D1 of the disk-shaped member 91c and the diameter (length) D2 of the polished rice blade 9a, and the materials of the polished rice blade assembly 91 and the disk-shaped member 91c are the same as those described in the first modification of FIG. This can also be said in the second modification.
[0029]
FIG. 11 is a side view of the third modified example 92 of the rice milling blade assembly, in which only the cup-shaped attachment 52 is shown in cross section. The milled rice blade assembly 92 has a boss 92c to which the milled rice blade 9a is attached, a bearing portion 92a extending upward from the boss 92c, and a shoulder portion 92b between the boss 92c and the bearing portion 92a. A cup-shaped attachment 52 constituting the shielding device is covered from above the bearing portion 92a. The cup-shaped attachment 52 includes a substantially circular flange 53 around the opening. A peripheral edge 53a of the opening engages with a shoulder portion 92b, and the flange 53 covers an upper portion of the root portion of the rice milling blade 9a. It is like that. The cup-shaped attachment 52 does not need to be connected to the boss 92c by adhesion or the like, and can be provided simply by covering the bearing 92a. About the diameter of the flange 53 and the diameter (length) of the rice milling blade 9a, and the material of the attachment 52 and the rice milling blade assembly, the same can be said as described in the above-described embodiment. Incidentally, the same bearing portion as the cup-shaped attachment may be integrally formed by enlarging the bearing portion. The shape of the cup-shaped attachment is not limited to a cylindrical shape, and may be a conical shape.
[0030]
FIG. 12 is a side view of the fourth modified example 92 of the rice milling blade assembly, in which only the cup-shaped attachment 55 is shown in cross section. A second opening 57 is provided in the cup bottom 54 of the cup-shaped attachment 55, and the periphery of the second opening 57 is curled upward. The flange 56 of the cup-shaped attachment 55 covers the base portion of the milled rice blade 9a from above. Unlike the embodiment of FIG. 13, since there is a portion formed in a curl shape, the periphery of the curled portion around the second opening 57 is hooked on the upper end portion of the bearing portion 92 a to form a cup-shaped portion. An attachment 55 can be attached. Of course, the inner peripheral edge of the flange 56 engages with the shoulder 92b and is dimensioned to prevent rice from entering the cavity within the cup-like attachment 55. Other dimensional relationships and materials are the same as in the above-described modification.
[0031]
FIG. 13 is a side view of a fifth modification 92 of the rice milling blade assembly, in which only the shielding device is shown in cross section. The shielding device includes a cylindrical portion 60 and a substantially circular flange portion 58 that protrudes inward and is provided inside the cylindrical portion 60. The inner peripheral edge 59 of the substantially circular flange portion 58 is attached to engage with the shoulder portion 92b, and the substantially circular flange portion 58 and the lower portion 60a of the cylindrical portion 60 cover the upper portion of the root portion of the milled rice blade 9a. . The length of the cylindrical portion 60 extends upward beyond the height of the bearing portion 92a in order to prevent rice from entering. The dimensional relationship and material are the same as those described in the above-described modification.
[0032]
14 (a) and 14 (b) show a modified embodiment of the table-top rice mill of the present invention. That is, the diameter of the top portion of the polished rice basket 5 is made larger than the diameter of the bottom portion to reduce the depth of the polished rice, thereby reducing the power consumed in the polished rice and reducing the efficient rice breaking rate.
FIG. 14A shows a case where the diameter of the polished rice basket 5 changes in two stages. FIG. 14B shows a case where the diameter changes continuously.
Specifically, in the case of a 5 to 6 table-top rice mill, the inner diameter of the bottom of the polished rice basket 5 is about 110 to 130 mm, and the inner diameter of the top (brown rice input port) is about 140 to 160 mm. Due to the shape of the polished rice basket, the distance between the upper surface of the brown rice in the polished rice basket and the polished rice blades, that is, the depth of the polished rice must be increased and the rotational force of the polished rice blades must be increased. The rate at which the rice grains at the tip of the milled rice blade are agitated by increasing the broken rice due to increased force, or conversely decreasing the milled rice depth, increasing the inner diameter of the milled rice basket, and increasing the length of the milled rice blade. Can solve the problem of increase in broken rice due to the increase in speed. Therefore, it is possible to polish rice efficiently with low power consumption and without increasing the number of rotations of the milled rice blades at a low milled rice ratio (milled rice ratio = crushed rice weight / milled rice weight × 100 (%)). Here, the polished rice means 100% polished white, that is, rice in a state where the straw is completely scraped off.
[0033]
Using the desktop rice mill of the present invention, the germinated rice mode can be selected and the germinated rice can be polished. The rice milling method that leaves the germ is possible even if the rice milling time is shortened.
The germinated rice obtained by the desktop rice mill of the present invention can be obtained in a state close to white rice by sufficiently removing the straw.
[0034]
Further, according to another example of the present invention, the pitch angle α of the polished rice blades is set in the range of 20 to 50 °, and the stirring force and convection action of the rice grains are improved by being substantially vertical in a part of the blades. ing. The combination of the polished rice blade and the polished rice basket whose diameter changes makes it easy to moderately adjust the rotational speed of the polished rice blade, and enables efficient polished rice while giving good (soft) stirring force to the brown rice. . Dividing rice grains with germs remaining after milling and rice grains from which germs have been removed, the ratio of rice grains with germs remaining to the total amount of rice grains, that is, the germ residue rate is 60% or more. In the case of polishing rice to suitable rice, 80% germ survival rate equivalent to commercially available germinated rice can be obtained.
[0035]
15 (a), 15 (b), and 15 (c) show another modification of the rice milling blade assembly, and FIG. 15 (a) shows a strip piece arranged in parallel with the bottom surface of the rice mill 5. It has a milled rice blade with its tip portion bent upward. The middle part of the strip piece may be further folded up and down as shown, or may be extended flat without being folded.
The front end portion of the band plate piece may be configured such that one side is bent upward and the other side is bent downward.
FIG. 15 (b) shows a strip piece disposed in a direction orthogonal to the bottom surface of the polished rice basket 5, and has a polished rice blade having a bowl-shaped tip.
FIG. 15C shows a strip piece arranged in a direction orthogonal to the bottom surface of the polished rice basket 5 and is bent in a substantially S shape parallel to the bottom surface.
In any example of the rice milling blade assembly used in the table rice mill of the present invention, the rice milling blade may be formed integrally with the shielding device using, for example, PP resin, etc. good.
Or you may comprise only a shielding apparatus with another body.
Further, the milled rice blade assembly as a whole may be integrally molded, or may be divided into a plurality of parts and may be appropriately created according to the material, moldability, or strength.
[0036]
Next, the control circuit of the table rice mill of the present invention having the above-described configuration and the rice milling / rice washing operation will be described.
FIG. 16 is a block diagram illustrating a configuration example of the control circuit (control unit) 80 in the control circuit box 8. The control circuit 80 includes a microcomputer 81 and a motor driving circuit 88 that controls driving of the motor 10. The microcomputer 81 is connected to the operation panel 7, and is connected to the speed sensor 86, the input / output (I / O) circuit 82 connected to the motor drive circuit 88, the CPU 83, and the memory (ROM, RAM) 84. A bus 85 is provided. When the buttons 70, 71, 75, 76, 78, 79 on the operation panel 7 are turned on, a signal indicating that is given to the microcomputer 81. Further, when the degree of milling and the amount of polished rice are set by the buttons 72 and 73, a signal indicating the set amount is given to the microcomputer 81 and the set amount is displayed on the display unit 74.
Note that the speed sensor 86 for detecting the rotation speed of the motor 10 is provided when the motor is controlled in a closed loop, and is not required when the motor is controlled in an open loop. Processing operations described below are executed by a program in the memory (ROM) 84.
[0037]
The table rice mill with the rice washing function of the present invention is a rice milling mode (rice milling operation only), a rice washing mode (rice washing operation only), and a rice milling / rice washing mode (automatically performing the rice washing mode after performing the rice milling operation). Have
[0038]
Hereinafter, various operation mode processes performed by the control circuit for the tabletop rice mill of the present invention will be described with reference to the flowchart of FIG.
First, when a power switch (not shown) is turned on, power is supplied to each component shown in FIG. Next, it is checked whether or not the rice washing mode button 75 on the operation panel 7 is turned on (step 160). If it is turned on, the process proceeds to step 188, where the rice washing mode is entered. If it is not turned on, it is checked in step 162 whether the rice milling / rice washing mode button 76 is turned on, and if it is turned on, the process proceeds to step 180 to shift to the rice polishing / rice washing mode. If it is not turned on, the process proceeds to step 164 to shift to the rice milling mode.
[0039]
In the rice milling mode, processing is performed as follows. First, rice to be polished / washed is put in a polished rice basket. In this state, in step 164, it is checked whether or not the germ mode button 71 is turned on. If it is turned on, the process proceeds to step 166 to perform germination mode rice polishing. Proceed to step 174.
[0040]
In the germ mode, first, in step 166, it is checked whether or not the rice milling amount is set by the button 73. If it is set, the rice milling time corresponding to this set value from the memory 84 and the PWM ratio of the drive signal to the motor are set. (Or the rotational speed of the rice milling blade) is read. In the germ mode, for example, as shown in FIG. 18, the PWM ratio and the milling time for each milled rice are set in advance as a map in the memory 84. In general, in the germ mode, the rotation speed is slower than in the normal rice milling mode, and the rice milling time is set longer.
Next, proceeding to step 168, it is checked whether the rice milling / rice washing button 70 has been pressed, and in response to the pressing, the read PWM ratio (rice milling blade) ), A control signal is given to the motor drive circuit 88 to perform rice polishing (step 170). That is, control is performed by giving a control signal indicating the read PWM ratio (the number of rotations of the milled rice blades) to the motor drive circuit 88 for the read milling time.
[0041]
In the normal rice milling mode, first, in step 174, it is checked whether the milling degree and the milling amount are set by the buttons 72 and 73. If these are set, the milled rice corresponding to these set values is stored from the memory 84. Reads the PWM ratio of the drive signal to the motor (or the rotational speed of the milled blades). In the normal rice milling mode, for example, as shown in FIG. 19, as a map in the memory 84, the PWM ratio and the rice milling time for each rice milling amount (in the figure, “minimum rice milling time” corresponds to a milling degree of 20%, for example). The “maximum milling time” is assumed to correspond to, for example, a degree of milling of 100%).
Next, the process proceeds to step 176, where it is checked whether the rice milling / rice washing button 70 has been pressed, and in response to the pressing, the read PWM ratio (rice milling blades) during the read rice polishing time. ), A control signal is given to the motor drive circuit 88 to perform rice polishing (step 178). In this way, the rice milling mode ends. In this state, it is checked in step 179 whether the rice milling / rice washing button 70 has been pressed. If not, nothing is executed and the process ends. On the other hand, when it is desired to wash the rice after the milling mode while the rice after the milling is contained in the polished rice basket, the milled rice / rice washing button 70 is pressed. Then, it is detected in step 179 and the process proceeds to step 192, where the rice washing mode is executed by the method described later. In this case, since the amount of polished rice has already been set in step 174, the rice washing may be executed based on the value. As long as the power switch is not turned off, the rice washing mode may be executed when the rice polishing / rice washing button 70 is pressed regardless of the elapsed time after the completion of the rice polishing mode.
[0042]
Next, the rice washing mode will be described. The rice washing mode is for washing polished rice (rice having a degree of whitening of 100%). First, in step 188, it is checked whether or not the rice washing amount is set by the button 73. If it is set, the rice washing time corresponding to the set value and the rotational speed of the rice milling blade are read from the memory 84. For example, as shown in FIG. 20, the rotational speed (or PWM ratio) of the rice milling blades for each rice washing amount in the rice washing mode is set in advance in the memory 84 as a map. In FIG. 20, the number of rotations (or PWM ratio) of the rice milling blades and the motor driving time (rotation time of the rice milling blades) for each rice milling amount (rice washing amount) in the rice milling mode and the rice washing mode are set. In FIG. 20, the rice milling time (rotation time of the rice milling blade), the rotation speed of the rice milling blade at the time of rice milling, the rice washing time (rotation time of the rice milling blade), and the rotation speed of the rice milling blade at the time of rice washing are specified within a certain range However, in an actual control circuit, the predetermined values within these ranges are set. About rice polishing time and rice washing time, the preferable setting value was described in (). This FIG. 20 will be described later in detail.
Next, the process proceeds to step 190, where it is checked whether the rice milling / rice washing button 70 has been pressed, and in response to the pressing, the motor is driven to perform the rice washing with the read rice milling time and the number of rotations of the rice milling blades. A control signal is given to the circuit 88 to perform the rice washing operation (step 192).
In addition, since the rice washing state can be seen through the transparent window 2 of the lid 3, the rice washing can be stopped by pressing the rice milling / rice washing button 70 at an appropriate time during the rice washing.
[0043]
Next, the rice polishing / washing mode will be described. In the polished rice / washed rice mode, the washed rice mode is automatically executed after executing the polished rice mode in which brown rice is polished into polished rice (rice having a polishing degree of 100%).
Therefore, first, in step 180, it is checked whether or not the rice milling amount is set by the button 73. If it is set, the rice milling time corresponding to the set value from the memory 84, the PWM ratio of the drive signal to the motor (or rice milling). Read the number of blade rotations). For example, in the map shown in FIG. 19, the PWM ratio corresponding to the amount of polished rice and the maximum polished time are shown. Moreover, in FIG. 20, it is the rotation speed of the rice milling blade | wing corresponding to the amount of rice milling, and the rice milling time.
Next, the process proceeds to step 182 where it is checked whether the rice milling / rice washing button 70 has been pressed, and in response to the pressing, the read PWM ratio (rice milling blades) during the read rice polishing time. ), A control signal is given to the motor drive circuit 88 to perform the rice polishing (step 184).
After completion of the rice milling operation, the rice washing operation corresponding to the amount of rice washing is performed (step 186). That is, the rice washing time corresponding to the amount of rice washing and the rotational speed of the rice milling blade are read from the memory 84. Therefore, the rotational speed (or PWM ratio) and the rice washing time corresponding to the rice washing amount are read from the map in the memory 84 shown in FIG. Next, a control signal is given to the motor drive circuit 88 to perform the rice washing operation in order to perform the rice washing with the read rice polishing time and the rotational speed of the rice polishing blades.
[0044]
In addition, when a certain amount (for example, 3 go) of polished rice is washed in the rice washing mode (steps 188 to 192 above), the same amount (for example, 3 go) of brown rice is continuously used in the polished rice + rice wash mode. Then, when the rice is polished and washed (steps 180 to 186 or steps 174 to 179 and 192 described above), the rotational speed in the rice washing mode may be different. That is, in the polished rice + rice-washed mode, for example, even with 3 unpolished rice, the weight of polished rice is reduced by about 5-10% after whitening. . Therefore, in the rice washing mode when a predetermined amount, for example, a rice cleaning amount of 3 go is set and the rice cleaning + rice washing mode is performed, the number of rotations is reduced as compared with the case where the rice washing amount is set to 3 go and only the rice washing mode is performed. And / or the drive time may be reduced. In addition, when washing the fractionated rice instead of the polished rice, the rotational speed may be reduced and / or the driving time may be reduced as compared with the case where only the rice washing mode is performed depending on the degree of the fractionation.
[0045]
By the way, the re-milling button 78 may be, for example, a flash button that is rotated only while being pressed, or may be rotated for a certain time once pressed. In this case, the value in the previous rice milling mode is used as the rotation speed.
Further, the rewash rice button 79 may function in the same manner as the remill rice button 78. In addition, the rotation speed uses the value in the previous rice washing mode.
Therefore, the re-milling button 78 may be pressed when instructing the re-milling after the polishing, and the re-washing button 79 may be pressed when instructing the re-washing after the washing.
[0046]
By the way, as described above, in the rice washing mode, cracking, chipping, cracking, etc. of rice increase when the moisture content is less than about 12.5%, while cracking, chipping, cracking, etc. of rice occur. If the moisture content is about 13.5% or more in order to reduce the rate, the rice bran is not sufficiently removed from the rice, and the turbidity when the washed rice is immersed in water increases. Therefore, the inventors of the present application examined the relationship between the moisture content, the turbidity, and the broken rice rate in the rice washing operation when the first modified example of FIG. 9 was used as the rice milling blade assembly. Experimental results are obtained.
In FIG. 21, the horizontal axis shows the rate of change in the weight of rice before and after washing (the weight of rice after rice sharpening (washed rice) / the weight of rice after polishing (before washing) X 100 (%)). In the middle, as it goes to the left (the smaller the rate of change in the weight of rice), the longer the washing time, the higher the removal rate of skin folds. A vertical axis | shaft shows the value of the moisture content with respect to the weight change rate of rice, turbidity (NTU), and a broken rice rate. In addition, as a moisture content measuring device, digital GRAIN MOISTURE METER manufactured by Okaya Keiki Seisakusho was used, and the measurement was performed after the rice was washed, the lid was opened, the rice was taken out, and set in the measuring device. Here, the rice immediately after washing has a high moisture content of nearly 14% due to the heat generated during the washing, and after the rice is removed from the rice mill, the water gradually evaporates, and as the temperature of the rice decreases, The moisture content also decreases, and after about 3 minutes have passed since the washing, the temperature and moisture content are reduced. Therefore, here, the moisture content is measured when about 2 to 3 minutes have passed since the washing was stopped. In order to make the measurement conditions uniform, immediately after the end of washing, the rice to be taken out of the rice mill is about 100 grams, and after putting it in a shallow container that can be spread so that the rice does not become a layer, the rice should be flattened. And it was allowed to stand until the above time passed, and then measured. As a turbidity measuring instrument, 2100P TURBIDIMETER made by HACK was used.
The turbidity was measured under the following conditions. First, about 300 ml of water is poured into a container (volume of about 500 ml) containing about 50 g of rice and left for about 20 minutes. The height at which water is poured is such that water does not repel from the container, for example, about 30 cm, and the pouring time is about 5 seconds. In addition, after pouring water into the container, it is better to leave it without stirring in order to prevent impurities other than rice cake from flowing out. In this way, after leaving the container for about 20 minutes, only water is replaced with another container, and the water is stirred for about 10 seconds at a peripheral speed of about 3 rotations / second. Then, the water is transferred to a dedicated test container, and the turbidity is measured after the water becomes stationary. Here, after the stirring for 10 seconds, the measurement was made after about 3 minutes. This is set to about 3 minutes as the time until the water is transferred to the test container, the fogging on the inner surface of the container is removed, and the stationary state is reached. The turbidity of water before injection used in this experiment is about 0.3 NTU.
[0047]
As described above, when the turbidity is high, that is, when the rice cake or skin cake remains attached to the rice, the taste is lowered. In addition, if the rate of crushed rice is high, the cooked rice is sticky and the taste is lowered, and cracks are likely to occur. Moreover, the smaller the weight change rate of rice, that is, the higher the removal rate of skin folds, the greater the loss of the umami layer and the lower the taste. As a result of the examination, the present inventors have found that a sufficient taste can be obtained if the broken rice rate is within the range of about 0.5% to about 3.5%, and therefore the range of the corresponding moisture content is about 12.5% to about 13.5% was confirmed. Moreover, about turbidity, it was made to become the value (150 +/- 20NTU-230 +/- 20NTU) close | similar to commercially available non-washed rice (about 100 NTU). In addition, the general turbidity of the polished rice after milling is 250 to 350 NTU, and the moisture content is 13.5% to 14.5%. The target water content after washing was about 12.5% to about 13.5%, but this varies depending on the state of the polished rice to be washed (water content). May vary. In addition, when turbidity was measured after washing the commercially available polished rice with the table rice mill of the present invention, 89 NTU for 1 go, 87 NTU for 2 go, 88 NTU for 3 go, 4 go In the case of, 75 NTU, in the case of 5 go, it was 71 NTU. From this, it can be seen that the desktop rice mill of the present invention can be used sufficiently as a rice washing machine (kenshiki) for washing commercially available polished rice.
[0048]
From this result, it was found that if the moisture content is in the range of about 12.5% to about 13.5%, the turbidity and broken rice rate can be satisfied.
Therefore, in the present invention, the number of rotations and the driving time (rice washing time) of the rice milling blades in the rice washing mode for keeping the moisture content within this range were obtained by experiment for each rice milling amount. The moisture content, turbidity, and broken rice rate are correlated with the rotational speed and driving time of the milled rice blades, and the rotational speed is too high, or if the stirring time is too long, the broken rice rate increases, or the rice tends to generate heat, The taste decreases. Therefore, also from such a viewpoint, the rotation speed and driving time (rice washing time) of the rice milling blades were appropriately set.
The results are shown in FIGS. 22 and 23. Based on these results, the rotation speed of the rice milling blades suitable for the above-mentioned appropriate moisture content of about 12.5% to about 13.5% for each rice milling amount and FIG. 20 shows the driving time (rice washing time) as a table. That is, FIG. 23 shows motor drive time (rice washing time, ie, stirring time) and rotational speed setting values for each rice washing amount (1 go, 2 go, 3 go, 4 go, 5 go). The moisture content obtained in each case. In addition, the moisture content at the time of opening of commercially available non-washed rice A, B, C, D was also described as reference.
[0049]
From the result of FIG. 20, FIG. 24 is a diagram comparing the suitable number of rotations of the rice milling blades for each rice milling amount in the rice milling mode and the rice washing mode. As is clear from these figures, in the rice milling mode, the rice milling time increases between 2 and 6 minutes according to the increase in the amount of milled rice, and the rotational speed of the rice milling blade is between 1900 and 2400 rpm. In the rice washing mode, the milling time is between 4 and 9 minutes, and the rotational speed of the milled rice blades increases between 1100 and 2100 rpm in accordance with the increase in the milled rice amount. Moreover, as shown in FIG. 24, the difference between the rice milling mode and the rice washing mode in the rotation speed of the suitable rice milling blades for each rice milling amount (rice washing amount) is substantially within 1000 rpm, that is, during the rice milling. The difference in the number of rotations of the rice milling blades at the time of washing with rice is substantially within 1000 rpm, and the difference tends to decrease as the amount of polished rice (the amount of washed rice) increases. Note that the rotational speed of the rice milling blades in the rice milling mode (or in the rice washing mode) can be lowered somewhat if the rice milling (or rice washing) time is somewhat longer, but it is possible to prevent an increase in the rice cracking rate and In order to maintain the turbidity, it is desirable that the difference in the rotational speed of the rice milling blades in the rice milling mode and the rice washing mode is within 1000 rpm. Similar results are obtained when the second to fifth modified examples of FIGS. 10 to 13 are used as the rice milling blade assembly. Further, as the milled rice blade assembly, the one shown in FIG. 2 or the like and the one shown in FIG. 15 can be used, but the rice cracking rate is slightly increased as compared with those in FIGS. 9 to 13.
[0050]
In general, the larger the amount of polished rice, the lower the rotational speed and the longer the time for rice polishing. It is. However, in practice, it has been found that, as the amount of washed rice increases, for example, in the case of 5 go, the washed rice is more efficiently performed with the same rice blade driving time and rotation speed as that of the polished rice. That is, the larger the amount of washed rice, the better the washed rice function, that is, the better the quality of the rice in a shorter time (lower crushed rice rate and lower turbidity). This tendency was found to be observed in a stirring-type rice mill regardless of the size and shape of the polished rice basket.
This is because the amount of washed rice increases, so even if it approaches the rotational speed at the time of milling, the jumping of rice is suppressed, so that the increase in the rate of crushed rice can be suppressed, and the rice is efficiently rubbed against the wire mesh of the milled rice basket, This is because sticky rice cakes interfere with each other by the rice being rubbed together, and the rice cakes are efficiently removed. However, if the rotational speed is increased to wash the rice in a shorter time, the peripheral speed increases, the temperature of the rice rises, the rice cracking rate increases, and the noise increases, which is not preferable. From this point of view, as the amount of washed rice increases, the rotational speed at the time of washing the rice is brought closer to the rotational speed at the time of rice polishing, but it is preferable not to increase any more.
[0051]
FIG. 25 is a comparative evaluation of various states of non-washed rice between the non-washed rice produced by the rice washing mode according to the present invention, the non-washed rice produced by a commercially available brush-type rice sharpener, and the commercially available non-washed rice. Here, the evaluation is made in five stages, S is the best, and then D is the lowest in the order of A, B, and C. From this figure, it was found that even in the amount of rice normally eaten in a general household (3 go or more), the non-washed rice produced by the rice washing mode according to the present invention is inferior to the commercially available non-washed rice. .
[0052]
In addition, after milling or washing, the milled rice may not be sufficiently scraped off from the net of the milled rice basket due to the oil content of the milled rice, static electricity, etc., and may partially adhere to the outside of the milled rice basket 5. Therefore, when the rice basket is reversed and the rice in the rice basket is struck to try to discharge the rice into the rice cooker, the rice bran may fall into the rice cooker together with the rice. Therefore, after the rice polishing or the rice washing, the polished rice basket may be rotated for a short time so as to screen off the rice cake adhering to the outside of the polished rice basket 5. As a method of rotating the polished rice basket, for example, the upper part of the polished rice basket is left in a free state, a clutch mechanism or the like is attached to the lower portion of the polished rice basket, and at the time of polished rice or rice washing, only the polished rice blades are rotated, and the polished rice or finished rice washing is completed. At the time of subsequent milling, the clutch mechanism is switched by a switching lever or the like to rotate the milled rice basket and the milled blade. Of course, it is also possible to take out the milled rice blade with its shaft portion (boss) at the time of detachment, and then switch the clutch mechanism with a switching lever or the like to rotate only the milled rice basket.
[0053]
【The invention's effect】
As described above, the desktop rice mill according to the present invention can wash the rice at a low rate of crushed rice, and thus can sufficiently remove the koji from the rice and prevent deterioration in taste and stickiness. Moreover, it is very convenient that the rice washing can be performed continuously and automatically as it is after the rice polishing, or the rice washing mode can be selectively executed again after the rice polishing. In addition, since the same blades can be used for the polished rice and the washed rice, there is no need to replace the blade for the washing operation. Therefore, the automatic continuous operation from the polished rice to the washed rice is performed, or the washed rice is left as it is after the polished rice. The rice washing operation can be executed by the start instruction means (for example, the rice milling / rice washing button), and a table rice mill with a rice washing function can be realized with a simple configuration and extremely easy maintenance.
[Brief description of the drawings]
1A is brown rice, FIG. 1B is white rice after polished rice, and FIG. 1C is rice after washed rice.
FIG. 2 is a perspective view showing the overall appearance of an embodiment of a table rice mill with a rice washing function according to the present invention.
FIG. 3 is a top view of the table mill for FIG.
4 is a cross-sectional view of the desktop rice mill of FIG. 2 along line IV-IV of FIG.
FIG. 5 is an exploded perspective view of a main part of the table mill for FIG.
6 is a view for explaining the angle of the blades of the rice milling blade assembly in the desktop rice mill of FIG. 2; FIG.
7 is a diagram showing a configuration example of a wire mesh of a polished rice basket in the desktop rice mill of FIG. 2. FIG.
FIG. 8 is a cross-sectional view of a main part of the rice mill for explaining the rice milling operation of the desktop rice mill of FIG. 2;
9 shows a first modified example of a rice milling blade assembly used in the desktop rice mill of FIG. 2, wherein (a) is a perspective view and (b) is a side view. FIG.
FIG. 10 is a side view of a second modification of the rice milling blade assembly used in the present invention.
FIG. 11 is a side view of a third modified example of the rice milling blade assembly used in the present invention, in which only the attachment is shown in cross section.
FIG. 12 is a side view of a fourth modified example of the rice milling blade assembly used in the present invention, in which only the attachment is shown in cross section.
FIG. 13 is a side view of a fifth modified example of the rice milling blade assembly used in the present invention, in which only the shielding device is shown in cross section.
14 (a) and 14 (b) are side views showing rice milling baskets having different modified embodiments of the present invention.
FIGS. 15 (a), (b) and (c) are perspective views showing a modification of the rice milling blade assembly used in the tabletop rice mill of the present invention.
16 is a block diagram illustrating a configuration example of a control circuit in a control circuit box in the desktop rice mill of FIG. 2. FIG.
FIG. 17 is a diagram showing a flowchart of various operation mode processes by the control circuit of the tabletop rice mill of the present invention.
FIG. 18 is a diagram showing an example of a map in which a PWM ratio and a rice milling time for each rice milling amount in the germ mode are set in the present invention.
FIG. 19 is a diagram showing an example of a map in which a PWM ratio and a rice milling time for each rice milling amount in a normal rice milling mode are set in the present invention.
FIG. 20 is a diagram showing an example of a map in which the rotational speed (or PWM ratio) of the rice milling blades and the motor driving time are set for each rice milling amount (rice washing amount) in the rice milling mode and the rice washing mode in the present invention.
FIG. 21 is a diagram showing experimental results of the relationship between moisture content, turbidity, and broken rice rate in the rice washing mode.
FIG. 22 is a diagram showing measured values of the water content after the rice washing according to the set values of the rotational speed and motor driving time of the rice milling blades for each rice washing amount shown in FIG.
FIG. 23 is a diagram showing set values of the rotational speed of the rice milling blades and the driving time of the motor for each amount of rice washing in the rice washing mode.
FIG. 24 is a diagram comparing the number of rotations of suitable rice milling blades for each rice milling amount in the rice milling mode and the rice washing mode based on the results of FIG.
FIG. 25 is a diagram showing a comparative evaluation of various states of non-washed rice between non-washed rice produced by the rice-washing mode according to the present invention and commercially available non-washed rice and the like.
[Explanation of symbols]
5 Rice milling basket
6 Firewood box
7 Operation panel
8 Control circuit box
9b, 90c, 92c boss
9, 50, 91, 92 Rice milling blade assembly
10 Motor
11 Body case
23a, 23b Drive shaft
50 Table milling machine
75 Rice washing mode button
76 Rice milling / Rice washing mode button
80 Control circuit

Claims (8)

A rice milling blade assembly including a plurality of rice milling blades which are provided on a member which is detachably fitted to the driving shaft and rotates together with the driving shaft, and which is disposed substantially perpendicular to the axial direction of the driving shaft; A rice mill that detachably accommodates rice milling blades, and a cocoon box that detachably accommodates the rice milling basket, and a side periphery of the rice milling basket is composed of a wire mesh, and during the milling, brown rice is placed in the rice milling basket. By rotating the drive shaft, the brown rice is agitated by the rotation of the milled rice blades, and the brown rice is rubbed against the mesh of the mesh net of the polished rice basket by the centrifugal force, and the straw is scraped off. In the table rice mill, which is blown outward from the mesh by force and dropped into the rice bran box, the rice after milling is accommodated in the milled rice as it is, and the number of rice lower than the rotational speed at the time of milling According to quantity Said rice milling blade in rotation speed by the rotation time corresponding to the amount of該米 performed washed rice with and rinsed rice so that the rice moisture content after bran rice is substantially within the range from 12.5% 13.5% The tabletop rice mill with the rice washing function. 2. The table milling machine according to claim 1 , wherein the number of rotations and the rotation time of the rice milling blades are set so that the rate of crushed rice after washing is substantially within the range of 0.5% to 3.5%. vessel. The desktop rice mill according to claim 1 , wherein the rotational speed and rotation time of the rice milling blades are set so that the turbidity of the rice after washing is substantially within the range of 130 NTU to 250 NTU. 2. The table milling device according to claim 1 , wherein the rice milling blade assembly further covers a root portion of the rice milling blade and exposes only a tip portion of the rice milling blade and is concentric with the drive shaft. The tabletop rice mill. 5. The table rice mill according to claim 4 , wherein the shielding device is a disk attached to a boss portion of a member on which the rice milling blades are disposed . The table rice mill according to claim 1 , further comprising an operation unit that instructs various operations of the table rice mill, and a control unit that controls a motor that drives the drive shaft in accordance with an instruction of the operation unit. The rice processing unit has a rice milling amount setting unit for setting the rice milling amount, and a rice milling / rice washing mode instruction unit for instructing to continuously perform the rice milling operation and the rice washing operation. In response to an instruction from the rice milling / rice washing mode instruction section after setting the rice milling amount, the rice milling blade is rotated for a time corresponding to the set rice amount at a rotation speed corresponding to the set rice amount. The rice milling operation is performed, and after the rice milling operation is completed, the rice milling blade is rotated for a time according to the set amount of rice at a rotation speed corresponding to the set amount of rice, and then the rice washing operation is automatically performed. Perform the tabletop rice mill. The table rice mill according to claim 1 , further comprising an operation unit that instructs various operations of the table rice mill, and a control unit that controls a motor that drives the drive shaft in accordance with an instruction of the operation unit. The rice processing unit has a rice milling amount setting unit for setting the rice milling amount, and a rice milling / rice washing instruction unit for instructing the start of rice milling or rice washing operation, and the control unit sets the rice milling amount after setting the rice milling amount in the rice milling amount setting unit. / When the start of the rice milling operation is instructed by the rice washing instruction section, the rice milling operation is performed by rotating the rice milling blades at a rotation speed corresponding to the set amount of rice for a time corresponding to the set amount of rice. When the start of the rice washing operation is instructed again by the rice milling / rice washing instruction section after the completion of the rice milling operation, the rice milling blade is made to respond to the set amount of rice at the number of rotations corresponding to the set amount of rice. The table rice mill that rotates for a certain period of time and continues to wash rice A rice milling blade assembly including a plurality of rice milling blades which are provided on a member which is detachably fitted to the driving shaft and rotates together with the driving shaft, and which is disposed substantially perpendicular to the axial direction of the driving shaft; A rice mill that detachably accommodates rice milling blades, and a cocoon box that detachably accommodates the rice milling basket, and a side periphery of the rice milling basket is composed of a wire mesh, and during the milling, brown rice is placed in the rice milling basket. By rotating the drive shaft, the brown rice is agitated by the rotation of the milled rice blades, and the brown rice is rubbed against the mesh of the mesh net of the polished rice basket by the centrifugal force, so that the straw is scraped off, and the scraped straw is centrifuged. In a table rice mill that is blown outward from the mesh by force and dropped into the rice bran box, the rice milling operation is performed by rotating the rice milling blades for a time corresponding to the amount of rice at a rotational speed corresponding to the amount of rice. The rice milled After the work finished, the rice of it after rice In the state where the polished rice basket stored in the state is stored in the rice bran box, the rice mill blades are automatically and continuously adjusted according to the amount of rice at a rotational speed corresponding to the amount of the rice lower than the rotational speed at the time of polishing. The table-top rice mill having the rice washing function of rotating the rice for a period of time and washing the rice so that the water content of the rice after washing is substantially within the range of 12.5% to 13.5%.

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