JP5637705B2 - Rice mill - Google Patents

Description

  The present invention relates to a small rice mill for home use suitable for milling a relatively small amount of rice.

  Conventionally, as a rice mill of this kind, the surface of the rice is obtained by stirring the rice in a rice milling container with a milled rice body rotated by an electric motor, and rubbing the rice against the mesh part of the side periphery of the rice milling container. A table-type rice mill used in homes or the like for scraping off rice bran to make white rice is known (for example, see Patent Document 1). In addition, the said rice milling container is accommodated in the rice bran receptacle so that attachment or detachment is possible. Then, the rice cake scraped off from the rice is discharged out of the net-like portion and stored in the rice cake receptacle.

JP 2008-229558 A

  However, such a rice mill has a problem that the mesh portion is gradually worn and broken due to friction with rice. As far as the present applicant has verified, it has been found that the portion where the mesh portion is torn is often inside the lower side of the locus drawn by the tip of the milled rice. That is, it can be seen that the friction between the mesh portion and the rice is large below the polished rice. Further, in such a rice mill, since the air flow that flows out of the mesh part by centrifugal force together with the rice cake flows into the mesh part from the upper part of the mesh part, one of the rice cakes once discharged from the rice mill container. There is a possibility that the portion may flow into the milled rice container again with the air flow or adhere to the mesh portion.

The present invention solves the above problems, and purpose thereof is to provide a rice instrument mesh portion is hard to break.

A rice mill according to claim 1 of the present invention includes a rice mill main body provided with an electric motor therein, a cocoon receptor detachably accommodated in the rice mill main body, and detachable in the rice jar receiver. A rice milling container provided with a net-like portion which is accommodated and has a large number of holes of a size that does not pass rice grains and passes rice cakes, and is provided in the rice milling container and rotates with the rotation of the electric motor. A rice mill that stirs the rice in the rice milling vessel, and the net-like portion has a side periphery, a bottom, and a curved portion that smoothly connects them , in the bottom of the rice milling vessel, Provided with a wear-resistant metal disc portion whose outer peripheral portion is curved upward and smoothly along the curved portion, and the radius of the disc portion extends from the center of the polished rice body to the outer end And the height of the outer peripheral edge of the disc part is It is lower than the lower end of the stirring portion of the milled rice body.

The rice mill according to claim 2 of the present invention is the rice mill according to claim 1, wherein the disk portion has a smooth surface .

The rice mill according to claim 1 of the present invention is housed in the rice milling container by rotating the rice milling body provided in the rice milling container with the electric motor by being configured as described above. The rice is agitated by the agitation part of the polished rice body and rubbed with the net-like part, whereby the rice cake on the surface of the rice is removed and discharged out of the polished rice container. At this time, the portion where the rice is rubbed most vigorously in the rice milling container, that is, the lower inner side of the locus drawn by the tip of the stirring portion of the milled rice body is a metal disc portion with excellent wear resistance. The rice mill container can be made difficult to break. Moreover, since the height of the outer peripheral end of the disc part is lower than the lower end of the stirring part of the milled rice body, it is possible to prevent the rice cake from being discharged into the rice cake receptacle through the mesh portion. be able to. Furthermore, since the outer peripheral part of the disc part smoothly curves upward along the curved part of the mesh part , the rice stirred by the milled rice is vigorously moved toward the outer peripheral part by centrifugal force. After that, the area can be increased smoothly and vigorously upward along the outer peripheral portion, and the area where rice is rubbed at the side peripheral portion of the mesh portion can be increased.

In addition, since the disc portion has a smooth surface, friction between the disc portion and rice can be reduced, wear of the disc portion itself can be minimized, and the rice can be subjected to centrifugal force. wherein after toward the outer peripheral portion so momentum well movement can Rukoto smoothly brought and vigorously upward rising along the outer peripheral portion by.

It is sectional drawing of the rice mill which shows one Embodiment of this invention. It is the side view which notched a part of rice milling container same as the above. It is a figure explaining the motion of the rice, rice bran, and airflow in the periphery of a rice milling container.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3. In the present embodiment, front and rear and top and bottom are defined based on the posture of FIG. 1, and the left side of FIG. 1 is the front and the right side is the back. 1 is a rice mill of the present invention. The rice mill 1 includes a rice mill main body 2, a rice bran receptor 3, a rice mill container 4, a rice mill body 5, and a lid body 6.

  The rice mill main body 2 has an outer shell body 9 composed of an upper outer shell body 7 and a lower outer shell body 8. An attachment hole 7A is formed on the upper front side of the upper outer shell body 7, and the operation portion 10 is attached to the attachment hole 7A. In addition, a storage recess 7B having a bottomed cylindrical recess whose upper side is opened is provided on the rear side of the upper outer shell body 7, and a through hole 7C is formed in the center of the bottom of the storage recess 7B. On the other hand, an attachment recess 8A is formed at the bottom of the lower outer shell body 8, and the cord reel 11 is attached to the attachment recess 8A. A plurality of leg attachment portions 8B are formed at the bottom of the lower outer shell body 8, and rubber legs 12 are attached to the leg attachment portions 8B, respectively. A drive mechanism 13 is accommodated in the outer shell body 9. The drive mechanism 13 includes a metal frame 14 and a bearing case 15, an electric motor 16 attached to the front portion of the frame 14, a primary driven shaft 17 pivotally supported on the rear portion of the frame 14, and the frame 14. A small pulley 18 that is attached to the rotating shaft of the electric motor 16 that penetrates and extends downward, a large pulley 19 that is attached to the lower end of the primary driven shaft 17 that penetrates the frame 14 and extends downward, and these small pulleys 18. And an endless drive belt 20 that is stretched between the pulley 19 and the large pulley 19 and a primary connection portion 21 that is attached to the upper end of the primary driven shaft 17 that extends upward through the bearing case 15. Is done. A concave bearing insertion portion 14A is formed in the rear portion of the frame 14, and the bearing case 15 is attached to the upper surface of the frame 14 so as to cover the bearing insertion portion 14A. A concave bearing insertion portion 15A is formed at the center upper portion of the bearing case 15, and a bearing 22 is fitted and fixed to the bearing insertion portion 15A. Another bearing 23 is also fitted to the bearing insertion portion 14A. Fixed. The primary driven shaft 17 penetrating the frame 4 is pivotally supported by the pair of upper and lower bearings 22 and 23 so that the central axis thereof is in the vertical direction. Further, the primary connection portion 21 is exposed from the through hole 7C into the storage recess 7B.

  The basket receptacle 3 for receiving the bowl B removed from the rice R is detachably inserted into the storage recess 7B. The bag acceptor 3 is formed in a substantially bottomed cylindrical shape, and a through hole 3B is formed coaxially with the through hole 7C corresponding to the through hole 7C of the storage recess 7B at the center of the bottom 3A. In addition, a cylindrical portion 3C is formed so as to extend upward from the through hole 3B and cover the outer periphery of the primary connection portion 21 and a secondary connection portion 31 described later.

  And the rice mill container 4 for accommodating the rice R is detachably inserted into the rice bran receptacle 3. The rice mill container 4 includes a mesh portion 24, a bottom member 25 fixed to the lower portion of the mesh portion 24, an upper edge member 26 fixed to the upper portion of the mesh portion 24, and an inner side of the bottom portion of the mesh portion 24. And a shield part 28 provided outside the upper part of the mesh part 24. The mesh portion 24 includes a substantially cylindrical side peripheral portion 24A, a bottom portion 24B, and a curved portion 24C that smoothly connects them. A bearing cylinder portion 25A protruding upward is formed at the center of the bottom member 25, and a shaft hole 25B is formed at the upper end thereof. Further, the bottom member 25 positions the rice milling container 4 with respect to the rice bran receptacle 3 and prevents the removed rice bran B and the like from entering the rice milling body 2 from the through hole 7C. For this purpose, a cylindrical portion 25C formed in a short cylindrical shape is provided. Then, the secondary driven shaft 29 penetrates the shaft hole 25B and is pivotally supported with respect to the bearing tube portion 25A so that the central axis thereof is vertical. Further, an engagement shaft portion 30 having a square hexagonal cross section is attached to the upper end of the secondary driven shaft 29, and the lower end of the secondary driven shaft 29 corresponds to the primary connection portion 21. And the secondary connection part 31 is attached. The primary connection portion 21 and the secondary connection portion 31 constitute a coupling 32 that transmits the rotation of the primary driven shaft 17 to the secondary driven shaft 29. On the other hand, a string-like grip 33 is swingably attached to the upper edge member 26.

  The disc part 27 is made of steel having a sufficient thickness. And the said disc part 27 is provided inside the said rice polishing container 4 so that the bottom part 24B of the said mesh-like part 24 may be covered from upper direction. The outer peripheral portion 27A of the disc portion 27 extends to the curved portion 24C of the mesh portion 24, and the outer peripheral portion 27A is curved upward and smoothly along the curved portion 24C. In addition, the said disk part 27 has a smooth surface in which a hole is not formed except the hole corresponding to the said bearing cylinder part 25A. The shielding portion 28 is provided so as to cover the upper portion of the side peripheral portion 24A of the mesh portion 24 from the outside. In addition, the said shielding part 28 does not have a hole or an unevenness | corrugation, and has a smooth surface.

  The rice milling body 5 for stirring the rice R in the rice milling container 4 is detachably attached to the engagement shaft portion 30 of the secondary driven shaft 29 in the rice milling container 4. The rice milling body 5 is located inside the rice milling container 4 when engaged with the engagement shaft portion 30. The milled rice body 5 is engaged with the engagement shaft portion 30, and the shaft body 34 is coaxial with the engagement shaft portion 30, and thus the secondary driven shaft 29, and the lower portion of the shaft body 34. To a rod-shaped body 35 as a pair of agitating portions provided so as to protrude in the radial direction with respect to the axial direction of the shaft body 34. In addition, an engagement hole portion 36 having a regular hexagonal cross section is formed in the shaft body 34 so as to correspond to the engagement shaft portion 30, so that the shaft body 34 is connected to the engagement shaft portion 30. The secondary driven shaft 29 is engaged in a state of being prevented from rotating. The rod-shaped body 35 is formed in a columnar shape from stainless steel or the like.

  Note that the outer edge of the outer peripheral portion 27A of the disk portion 27 extends to the outside of the locus drawn by the tip 35A of the rod-shaped body 35 that is a stirring portion. Further, the outer edge of the outer peripheral portion 27A of the disc portion 27 is lower than the lower end 35B of the rod-like body 35 that is a stirring portion. Further, the lower end portion 28A of the shielding portion 28 is configured so that the minimum amount of polished rice R stored in the polished rice container 4 is agitated by the rotation of the polished rice body 5, thereby It is set to the same level as the height rising along 24A. In this example, the minimum amount of polished rice is about 0.18 L (one go).

  Further, the lid 6 is detachably attached so as to cover the upper part of the storage recess 7 </ b> B, the koji receiver 3 and the rice milling container 4. In addition, this cover body 6 is comprised with the synthetic resin with the whole so that the inside of the said rice milling container 4 can be visually recognized.

  Next, the operation of the above configuration will be described. First, the user attaches the rice milling body 5 to the engaging shaft portion 30 of the secondary driven shaft 29 of the rice milling container 4 and then stores a predetermined amount of rice R in the rice milling container 4. Further, the rice bran receiver 3 is attached to the storage recess 7 </ b> B of the rice miller body 2. At this time, the upper side of the primary connection portion 21 constituting the coupling 32 is exposed from the through hole 3B, and the outer peripheral side is covered by the cylindrical portion 3C. And the said rice milling container 4 in which the said rice milling body 5 was attached and the rice R was accommodated is mounted | worn inside the said rice bran receptacle 3. FIG. At this time, the secondary connection part 31 constituting the coupling 32 is inserted into the cylindrical part 3C and engaged with the primary connection part 21, and the cylindrical part 25C is connected to the cylindrical part 3C. The rice mill container 4 is positioned with respect to the rice bran receptacle 3 by being mounted so as to cover the upper outer side. Further, after closing the upper opening of the housing recess 7B by the lid body 6, a cord (not shown) is pulled out from the cord reel 11, connected to an AC power source (not shown), and the power source is operated by operating the operation unit 10. throw into. Next, the control parameter of the electric motor 16 is changed by operating the operation unit 10 based on the amount of rice R accommodated in the rice milling container 4 and the target rice milling degree. More specifically, the number of revolutions of the electric motor 16, that is, the milled rice body 5, is controlled by a control circuit (not shown) according to the amount of rice R and the target milling degree. That is, the number of revolutions of the electric motor 16 is such that the rotational speed of the polished rice body 5 is higher as the amount of rice R is larger, and the rotational speed of the polished rice body 5 is lower as the amount of rice R is smaller. Is controlled (2000 to 3000 rpm). Further, the control circuit controls the drive time of the electric motor 16 so that the drive time of the rice milling body 5 is longer as the target rice milling degree is higher and the drive time of the rice milling body 5 is shorter as the target rice milling degree is lower. To do. Note that such rotation speed and driving time are calculated by designating the amount of rice R and the degree of milling, or read from the data table.

  In this way, when the operation panel 10 is operated after calculating or reading the control parameters of the electric motor 16 in consideration of the rice milling amount and the target rice milling degree, the electric motor is driven via the drive circuit by the control signal from the control circuit. 16 is driven. The driving force of the electric motor 16 rotates the milled rice body 5 from the small pulley 18 through the driving belt 20, the large pulley 19, the first driven shaft 17, the coupling 32, and the secondary driven shaft 29. The milled rice 5 is rotated at a predetermined reduction ratio with respect to the number of rotations of the electric motor 16 depending on the radius ratio of the small pulley 18 and the large pulley 19. Then, by rotating the rice mill body 5, the rice R in the rice mill container 4 is agitated and the rice mill body 5 is rotated, so that the grains of the rice R rub against each other, or the rice R Grains and the polished rice container 4 rub against each other, and thereby the rice R is polished. The grains of rice R move in the milled rice container 4 so as to smoothly get over the columnar rod-shaped body 35 or to pass through the columnar rod-shaped body 35 smoothly. For this reason, since the rice R does not move more intensely than necessary, the temperature rise of the rice R due to friction or collision can be kept low. And by suppressing the temperature rise of the rice R, not only can the amount of water decrease in the rice R be kept low, the generation of broken rice can be kept low, but also the oxidation due to heat can be suppressed, so the deterioration of the taste is also suppressed. be able to. In addition, since the rod-shaped body 35 has a relatively thick columnar shape and the front end in the rotational direction is dull, when the rod-shaped body 35 collides with the grains of the rice R, the impact is not concentrated on the local areas of the grains of the rice R. The occurrence of broken rice can be kept low.

  The rice bran B scraped from the rice R is discharged together with the air flow F from the mesh portion 24 of the rice milling container 4 and stored in the rice bran receptacle 3. And when the cylindrical part 25C provided in the bottom part 25 is mounted so as to cover the upper outer side of the cylindrical part 3C, the ridge B or the like enters the rice mill main body 2 from the through hole 7C. Is prevented.

  The rice R is softer than the steel forming the mesh 24, but a large amount of rice R rubs against the mesh 24 for a long period of time, so that the mesh 24 is worn. Then, when the wear of the mesh body 24 progresses, the mesh body 24 may be broken as described above. However, by providing the steel disk part 27 having a sufficient thickness inside the bottom part of the mesh part 24, the rod-like body 35 in which the friction between the mesh part 24 and the rice R is maximized. The rice milling container 4 is less likely to be damaged. In particular, since the outer edge of the outer peripheral portion 27A of the disc portion 27 extends to the outside of the locus drawn by the tip 35A of the rod-shaped body 35, the rod-shaped body 35 where the friction between the mesh portion 24 and the rice R is the largest. It is possible to make it difficult to wear the entire lower part of the. In addition, since the disk part 27 has no holes other than the holes corresponding to the bearing cylinder part 25A and has a smooth surface, the friction between the disk part 27 and the rice R can be reduced. The wear of the disk portion 27 itself can be minimized.

  In addition, since the hole is not formed in the disc part 27, the rice cake B removed from the rice R is not discharged downward. However, since the outer edge of the outer peripheral portion 27A of the disc portion 27 is lower than the lower end 35B of the rod-like body 35, the cocoon B removed from the rice R is horizontal along the air flow F and acts as a centrifugal force from the mesh portion 24. It is not hindered by the disk part 27 from being discharged to the surface. Further, since the friction between the disc portion 27 and the rice R is small and the outer peripheral portion 27A of the disc portion 27 is smoothly curved upward along the curved portion 24C, it is stirred by the rice milling body 5. Compared with the conventional structure, the rice R moves upward toward the outer peripheral portion 27A by centrifugal force, and then rises smoothly and vigorously along the outer peripheral portion 27A. Then, the rice R that has risen vigorously rises along the side peripheral portion 24A of the mesh portion 24, and is rubbed against the side peripheral portion 24A, so that the ridge B is removed. As described above, the rice R rises vigorously along the side peripheral portion 24A, so that the rice R reaches a higher position along the side peripheral portion 24A than the conventional structure. For this reason, the area where the rice R is rubbed in the side peripheral portion 24A can be increased as compared with the conventional structure. Accordingly, it is possible to suppress the reduction in the rice milling efficiency due to the fact that the rice R does not rub against the bottom 24B of the mesh portion 24.

  In addition, as for the said rice R, the rotational speed falls by the friction with the said mesh-shaped part 24, so that the high position along the said side peripheral part 24A. Therefore, the centrifugal force acting on the rice R decreases as the position increases along the side circumferential portion 24A. For this reason, the airflow F discharged from the rice milling container 4 by centrifugal force becomes weaker upward along the side peripheral portion 24A, and flows into the rice milling container 4 from a certain height H on the contrary. The height H is low when the amount of polished rice is small, and is high when the amount of polished rice is large. Above the height H, the rice R moves toward the center of the rice milling container 4. In other words, below this height H, the rice R moves along the side periphery 24A. Accordingly, the rice bran B riding on the air flow F tends to flow from the rice bran receptacle 3 into the rice milling container 4 through the side peripheral portion 24A of the mesh portion 24 above the height H. However, the outer side of the upper portion of the side circumferential portion 24A is covered with the shielding portion 28 without a through hole, and the lower end portion 28A of the shielding portion 28 is at a minimum amount of polished rice (one in this embodiment). Since the height H is set to be approximately the same as the height H, when the airflow F returns to the rice milling container 4, the ridge B riding on the airflow F is obstructed by the shielding portion 28 and enters the rice milling container 4. Intrusion is suppressed. Further, the stick B is prevented from adhering to the side peripheral portion 24A of the mesh portion 24. For this reason, when the said rice mill container 4 is taken out from the said rice mill main body 2 after completion | finish of rice polishing, it can be made hard to generate | occur | produce the problem that the cocoon B adhering to the said mesh-like part 24 falls to a floor | bed etc.

  When the amount of the rice R is greater than the minimum amount of polished rice, the height H is higher than the lower end portion 28A of the shielding portion 28. However, since the outside of the side circumferential portion 24A is covered with the shielding portion 28, the rice R can rub against the mesh portion 24 even at a position higher than the lower end portion 28A of the shielding portion 28. Therefore, the rice mill 1 can polish the rice R by effectively using the side peripheral portion 24A of the mesh portion 24, regardless of the amount of polished rice. Furthermore, since the outer side of the side circumferential portion 24A is covered by the shielding portion 28, the ridge B, which is blocked from entering the rice milling container 4 by the shielding portion 28, is formed on the side circumferential portion 24A of the mesh portion 24. It can be prevented from accumulating. In addition, since the through-holes and irregularities are not formed in the shielding portion 28 itself and the outer surface is smooth, the ridge B that is blocked from entering the rice milling container 4 by the shielding portion 28 is formed on the outer surface of the shielding portion 28. It can also be prevented from sticking. For this reason, in combination with the suppression of the adhesion of the rice bran B to the mesh portion 24, the rice cake adhered to the outer surface of the rice milling container 4 when the rice milling container 4 is taken out from the rice milling body 2 after the completion of the rice polishing. It is possible to prevent the problem that B falls on the floor or the like.

As described above, the present invention relates to a rice milling machine body 2, a rice cake acceptor 3 that is detachably accommodated in the rice milling machine body 2, and a rice R grain that is removably accommodated in the rice bran receptor 3. A rice milling container 4 provided with a net-like portion 24 in which a large number of holes that do not pass through and the ridge B are formed is provided, and the rice milling container 4 is provided in the rice milling container 4 and the electric motor 16 in the rice milling machine body 2 rotates. rotating possess the milled rice body 5 for agitating the rice R of the rice container 4 Te, wherein the mesh portion 24, a side periphery 24A, a bottom 24B, and a curved portion 24C that connects them smoothly a milled rice device 1 closed, the bottom of the rice container 4, larger radius than the dimension from the center of the rice body 5 to the tip of the rod-like body 35 is stirred portion, the lower end of the rod-shaped body 35 Metal disc part with low outer edge height of outer peripheral part 27A and excellent wear resistance 7, it is possible to make it difficult to damage the inner side below the locus drawn by the tip of the stirring unit 35 of the rice milling body 5 during the milling of the rice R. In addition, it is possible to prevent the rice cake B from being discharged from the rice mill container 4. In addition, by smoothly bending the outer peripheral portion of the disc portion upward along the curved portion, the rice stirred by the milled rice was moved vigorously toward the outer peripheral portion by centrifugal force. Then, it can be raised smoothly and vigorously upward along this outer peripheral portion, and the area where rice is rubbed in the side peripheral portion of the mesh portion can be increased.

In addition, the present invention has a smooth surface so that the friction between the disc portion and the rice can be reduced, and the wear of the disc portion itself can be minimized. after moving vigorously toward the outer periphery by centrifugal force, in which it is Rukoto smoothly brought and vigorously upward rising along the outer peripheral portion.

  In addition, this invention is not limited to the above embodiment, A various deformation | transformation implementation is possible within the range of the summary of invention. For example, in each of the above embodiments, the disc portion is provided so as to cover the upper portion of the bottom portion of the mesh portion, but the mesh portion may be connected to the outer peripheral portion of the disc portion.

DESCRIPTION OF SYMBOLS 1 Rice milling machine 2 Rice milling machine main body 3 Grain receptacle 4 Rice milling container 5 Rice milling body 16 Electric motor 24 Mesh part 24A
27 disc part 27A outer peripheral part 28 shielding part 28A lower end part 35 rod-shaped body (stirring part)
35A Front end 35B Lower end R Rice H Height at which rice R can rise along reticulated portion 24

Claims (2)

A rice mill main body with an electric motor inside, a rice cake acceptor that is detachably accommodated in the rice mill main body, and a rice cake receptacle that is detachably accommodated in the rice grain acceptor and does not pass rice grains and passes the rice cake. Yes size and milled rice container mesh portion is provided forming a large number of pores of, a milled material to stir the rice the rice within the vessel and rotated with the rotation of the electric motor with is provided to the rice in a container In the rice mill, the mesh portion has a side periphery, a bottom, and a curved portion that smoothly connects them .
Provided at the bottom of the rice milling vessel is a metal disc part with excellent wear resistance, whose outer peripheral part is curved upward and smoothly along the curved part, and the radius of this disc part is the rice milling A rice mill that is larger than the dimension from the center of the body to the outer end, and that the height of the outer peripheral end of the disc part is lower than the lower end of the stirring part of the rice milling body.   The rice mill according to claim 1, wherein the disk portion has a smooth surface.

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