JP4811303B2 - Household rice milling machine - Google Patents

Description

The present invention relates to a rice mill for home use.

In recent years, small brown households that do not get in the way even when placed in a small place such as a kitchen, so that brown rice can be purchased directly from a farmer and then cooked at home can be immediately started. Rice milling machines have become widespread (see, for example, Patent Document 1 and Patent Document 2).

In such a domestic rice milling machine, the domestic rice milling machine disclosed in Patent Document 1 is provided with a plurality of protrusions made of an elastic material such as rubber on the inner wall surface of the tank at an appropriate interval. In this way, even when the rotating blades are rotated at high speed, the occurrence of crushed rice is extremely reduced and the milling is completed in a short time of about 1 to 2 minutes. It can be made to.

However, in the rice milling machine of the above-mentioned patent document 1, there is a problem that the manufacturing cost is high because the protrusions attached to the inner wall surface of the tank are formed of a material different from the tank.

JP 49-35150 A JP 2000-254528 A

In view of the above-mentioned problems, the present invention provides a household rice milling machine that makes it possible to reduce the manufacturing cost by forming protrusions attached to the inner wall surface of the tank from the same material as the tank and to improve the milling ability. Doing this is a technical issue.

In order to solve the above-mentioned problems, a first aspect of the present invention provides a milled rice mill container having a cylindrical mortar having a porous wall for removal and having an inner diameter of the lower peripheral wall smaller than that of the upper end, and surrounding the container. The collecting container is detachably accommodated in a substantially cylindrical outer frame, and its open upper part is covered with a lid, and a vertical protrusion provided with a stirring piece at the center of the bottom of the mortar-shaped rice milling container. In a household rice milling machine in which a shaft is erected and a driving means for driving the longitudinal axis is built below the outer frame, the inner peripheral wall of the cylindrical portion of the mortar-shaped rice milling container is bulged by press working A technique in which a plurality of projecting portions are provided such that substantially the center in the height direction of the projecting portions intersects with the lower edge extension line of the stirring projecting piece and is equidistant in the circumferential direction of the cylindrical portion. Took appropriate measures.

In the invention according to claim 2, the size of the protruding portion is such that the circumferential width of the cylindrical portion is 10 to 16 mm, the height of the protruding portion is 7 to 10 mm, and the thickness in the central direction is 1.0. The gap between the projection and the end face of the stirring protrusion is 5.0 to 6.0 mm.

Furthermore, the invention described in claim 3 is characterized in that the number of the projecting portions is a multiple of the number of blades of the stirring projecting piece.

According to the first aspect of the present invention, since the protrusion can be formed only by molding the mortar-shaped rice milling container such as press processing, a special material different from the material of the mortar-shaped rice milling container is used. There is no need to use it, and the manufacturing cost can be reduced. Further, the rice grains in the mortar-shaped rice milling vessel are agitated by the rotating action of the agitating protrusion, and are pressed against the inner peripheral wall of the mortar-shaped rice milling container. When the rice grains roll, the posture is changed while the rice grains roll and collide with a plurality of protrusions provided at equal intervals in the circumferential direction of the cylindrical portion. Will come to be. In addition, when the lower end edge extension line of the stirring protrusion deviates greatly downward from the substantially center of the protrusion in the height direction, there is a gap between the bottom of the cylindrical portion and the lower end edge of the stirring protrusion. On the other hand, if the lower end edge extension line of the stirring projecting piece deviates greatly upward from the approximate center in the height direction of the projecting portion, the rice grains may be The number of collisions with the protrusions is extremely reduced, and the action of changing the posture by rolling rice grains is drastically reduced.

According to the second aspect of the present invention, as the size of the protruding portion, the circumferential width is 10 to 16 mm, so that the action and effect of changing the posture by rolling the rice grains of the protruding portion is increased. By setting the thickness of the protrusion in the center direction to 1.0 to 2.0 mm, it is possible to facilitate press work without hindering the whiteness increase of rice grains. Then, by forming a gap between the protrusion and the end face of the stirring protrusion of 5.0 to 6.0 mm, the gap between the protrusion and the stirring protrusion is appropriately maintained, and the rice grains are poorly circulated. , Can prevent the occurrence of broken rice and missing rice.

According to the invention of claim 3, since the number of protrusions is a multiple of the number of blades of the stirring protrusion, the protrusions are arranged symmetrically when the cylindrical part is viewed in a plane, The equilibrium state of the pressure in the milled rice container can be maintained, and poor circulation of rice grains, uneven milled rice, and increased crushed grains can be prevented.

Hereinafter, a domestic rice mill according to an embodiment of the present invention will be described with reference to the drawings.

1 is a perspective view showing an outline of a rice mill for home use, FIG. 2 is a longitudinal sectional view showing an internal structure when cut along the line AA 'in FIG. 1, and FIG. It is a longitudinal cross-sectional view which shows an internal structure when it fractures | ruptures by B 'line.

1 to 3, reference numeral 1 is a home-grown rice mill, reference numeral 2 is a base that accommodates a motor 3 or the like serving as a drive source, and an upper part of the base 2 is integrated with the base 2. An outer frame 2a is formed, and an inner frame 2b is provided inside the outer frame 2a so that the milled rice mill container 4 and the like can be taken out. The mortar-shaped rice milling container 4 is formed in a hopper shape that can be opened at the top by removing the lid 5, and at least the lower peripheral wall of the mortar-shaped rice milling container 4 is formed on the porous wall 6 for removal. Yes. And the lower peripheral wall part of this porous wall 6 for ablation is formed in the cylindrical part 7 whose internal diameter is smaller than the internal diameter of the upper end edge of the said mortar-shaped rice milling container 4. FIG. Reference numeral 8 denotes a non-porous bottom, and reference numeral 9 denotes fixing means for fixing the mortar-shaped rice milling container 4 to the collecting container 10. Reference numeral 23 denotes a protruding portion of the collecting container 10, and the fixing means 9 of the cylindrical portion 7 is fitted to the outer periphery of the protruding portion 23 to fix the non-porous bottom portion.

The outer periphery of the mortar-shaped rice milling container 4 is surrounded by a cylindrical collecting container 10. At this time, since the lower peripheral wall of the porous wall 6 for removal is formed in the cylindrical portion 7 having a small diameter, a removal room 11 is formed in the gap between the mortar-shaped rice milling container 4 and the collecting container 10. The milled rice container 4 is fixed to the inner frame 2a by the protrusion 23 and the outer peripheral flange 10a at the upper end of the collecting container 10. A vertical axis 12 is rotatably supported at the center of the bottom 8 of the milled rice mill 4, and a vertical axis 24 for polishing rice having a plurality of stirring protrusions 13 is provided on the vertical axis 12. And one side of the joint 14 capable of separating the rotational force from the motor 3 is connected to the lower portion of the vertical axis 12.

Next, the structure of the drive source etc. accommodated in the base 2 is demonstrated. The base 2 accommodates a motor 3 that can change the number of rotations, and a vertical axis 16 that is rotatable by a bearing 15 is provided directly below the vertical axis 12. A motor pulley 17 is mounted on the motor shaft 27 of the motor 3, while a relay pulley 18 is mounted on the upper portion of the vertical axis 16, and the other joint 25 of the joint 14 is mounted on the upper portion of the relay pulley 18. Provide. A belt 19 is wound between the motor pulley 17 and the relay pulley 18 so that the rotational force of the motor 3 is transmitted to the vertical axis, for example, with a reduction ratio of 1: 3. Reference numeral 20 denotes a rotation sensor that detects the number of rotations of the vertical axis 16, reference numeral 21 denotes a control device for a domestic rice mill, and reference numeral 22 denotes an operation panel.

FIG. 4 is a perspective view showing the schematic structure of the mortar-shaped rice milling container 4. The upper surface opening of the mortar-shaped rice milling container 4 is provided with an outer peripheral flange 4a. A plurality of (for example, a pair of) lower protrusions 4b are provided for stopping the rotation. Reference numeral 4c denotes a non-porous hopper portion, and a cylindrical portion 7 is formed below the hopper portion 4c. The cylindrical portion 7 may be formed of a punching plate or a wire netting as the porous wall 6 for removal, but in this embodiment, the cylindrical portion 7 is formed in a lath net 28 having a mesh width that does not leak rice grains.

A plurality of protrusions 27 swelled by press working are formed on the inner peripheral wall of the cylindrical portion 7 near the bottom 8, and the center in the height direction of the protrusions 27 is at the lower end of the stirring protrusion 13. It intersects with the extension line P of the edge 13a (see FIG. 6) and is provided at equal intervals in the circumferential direction of the cylindrical portion 7 (see FIG. 5). As a result, the rice grains in the mortar-shaped rice milling container 4 are agitated by the rotating action of the agitating protrusion 13 and are pressed against the inner peripheral wall of the mortar-shaped rice milling container 4 (particularly the cylindrical portion 7). The posture is changed while rolling by colliding with, so that uniform equalization is performed. For example, when the projections 27 are provided and the projections 27 are not provided (see, for example, Patent Document 2) as in the present embodiment, the rice grains having the projections 27 are compared. It was found that the removal ratio of about 1.4% was improved in the surface area ratio. In addition, although the extension line P of the lower end edge 13a of the stirring protrusion 13 intersects at substantially the center in the height direction of the protrusions 27, it intersects slightly below the center in the height direction of the protrusions 27. Is preferred. Further, when the extension line P of the lower end edge 13a of the agitating protrusion 13 deviates greatly downward from the approximate center in the height direction of the protrusions 27, the bottom 8 of the cylindrical portion 7 and the agitating protrusion 13 There is a possibility that the gap between the lower end edge 13a of the stirring protrusion and the lower end edge 13a of the stirrer is extended from the substantially center of the protrusion in the height direction. If the grain is greatly displaced upward, the number of times the rice grains collide with the protrusions 27 becomes extremely small, and the action of changing the posture by rolling the grains is drastically reduced.

The protrusions 27 can be formed simply by molding the mortar-shaped rice milling container 4 by pressing or the like, so there is no need to use a special material different from the material of the mortar-shaped rice milling container 4. The manufacturing cost can be reduced.

FIG. 5 is a schematic plan view of the cylindrical portion 7, and FIG. 6 is an enlarged vertical sectional view of the protruding portion 27. The size of the protruding portion 27 will be described with reference to FIGS.

As for the size of the protrusions 27, the circumferential width is 10 to 20 mm, preferably 16 mm. That is, if the length is longer than 20 mm, the action of rolling the rice grains is lost and the meaning of providing the protrusions 27 is lost. If the circumferential width is 16 mm as in the present embodiment (see FIG. 5), the difference in width between the location where the projections 27... It seems that the action and effect of changing the posture by rolling the 27 ...

The height of the protrusions 27 is 7 to 10 mm, preferably 7.4 mm. This is because the wall 7a closer to the bottom 8 of the cylindrical portion 7 is formed with a height of 15 mm from the bottom 8, and it is necessary to form the protrusions 27.

Furthermore, the thickness in the center direction of the protrusions 27 is 1.0 to 2.0 mm, preferably 1.5 mm. That is, as a result of the scouring test in the case where the thickness was 1.0 mm and in the case where the thickness was 2.0 mm, the increase in whiteness of the rice grains was almost the same. For this reason, a thickness of 1.5 mm, which is easy to press, is adopted.

The angle of the inclined surface 29 that joins the bottom wall 7a and the projection 27 is preferably 45 degrees. The inclined surface 29 has an angle of 45 degrees in order to prevent the cracking between the protruding portion 27 and the wall 7a formed by press working as the angle becomes sharper as the compression and elongation of the material increase.

The gap between the protrusion 27 formed as described above and the end face 13b of the stirring protrusion 13 should be 5.0 to 6.0 mm, preferably 5.25 mm. That is, if the gap between the protrusion 27 and the end face 13b of the stirring protrusion 13 is not maintained at an appropriate gap, there is a possibility that poor circulation of rice grains, excessive milling, broken rice, and headless rice may occur.

Further, the number of protrusions 27 is preferably a multiple of the number of blades of the stirring protrusion 13. In this embodiment, the number of blades of the stirring protrusion 13 is two (see FIGS. 2 and 3), and three times this, that is, six protrusions 27a to 27f (see FIG. 5) are provided. Thus, they are arranged symmetrically in the cylindrical portion 7, and the pressure equilibrium state can be maintained. If the seven protrusions 27 are formed, the balance of rice grains in the cylindrical portion 7 is lost, resulting in poor circulation, uneven rice milling, and increased crushed grains.

Hereinafter, the operation of the above configuration will be described.

First, the collecting container 10 is accommodated in the outer frame 2a, and the mortar-shaped rice milling container 4 is accommodated in the collecting container 10, and then the vertical axis 24 for polishing is fitted to the vertical axis 12 (see FIG. 2, see FIG. Then, when a desired amount of brown rice is put into the milled rice mill container 4 and covered with the lid 5 and fixed to the outer frame 2a, a safety switch (not shown) is turned on, and the motor 3 can be activated.

Next, when the rice milling amount switch and the whiteness switch on the operation panel 22 are set to desired values and the operation switch (both not shown) is turned on to start the rice milling, the preset motor rotation speed and motor driving time are set. Is read and the motor 3 is driven.

When the motor 3 is driven, the rotational force is transmitted to the vertical axis 16 and the stirring protrusion 13 is rotated. At this time, the rice grains in the mortar-shaped rice milling container 4 are stirred by the rotating action of the stirring protrusion 13 and pressed against the inner peripheral wall of the mortar-shaped rice milling container 4 (particularly, the cylindrical part 7), and a plurality of protrusions 27. The posture is changed while rolling by colliding with, and uniform equalization is performed.

When the set drive time elapses and the rice milling is finished, the rice bran scraped from the rice milling and brown rice is taken out in a procedure opposite to the above. That is, the lid 5 is detached from the outer frame 2a, and the collecting container 10 and the mortar-shaped rice milling container 4 are detached from the outer frame 2a, and the rice mill and rice bran are carried.

Further, the mortar-shaped rice milling container 4 and the collecting container 10 are such that the lower protrusions 4b on the lower surface of the outer peripheral flange 4a of the mortar-shaped rice milling container 4 are placed on the flange 10a of the collecting container 10; The milled rice container 4 and the collecting container 10 can be easily separated, and when using the koji for food, the koji can be taken out from the collecting container 10 and maintenance such as washing after use is also possible. It can be done easily.

As described above, according to the present embodiment, the plurality of protrusions 27 bulged by pressing are formed on the inner peripheral wall near the bottom 8 of the cylindrical portion 7 in the height direction of the protrusions 27. Since the center intersects with the extension line P of the lower end edge 13a of the stirring protrusion 13 and is provided at equal intervals in the circumferential direction of the cylindrical portion 7, it is a special item different from the material of the milled rice mill container 4 It is not necessary to use a new material, and the manufacturing cost can be reduced.

It is a perspective view which shows the outline of a rice mill for home use. It is a longitudinal cross-sectional view which shows an internal structure when fractured | ruptured by the A-A 'line | wire of FIG. It is a longitudinal cross-sectional view which shows an internal structure when it fractures | ruptures by the B-B 'line | wire of FIG. It is a perspective view which shows schematic structure of a mortar shaped rice container. It is a schematic plan view of a cylindrical part. It is an expansion longitudinal cross-sectional view of a projection part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Home rice milling machine 2 Base 3 Motor 4 Mortar shaped rice container 5 Lid 6 Porous wall 7 for removing debris Cylindrical part 8 Bottom part 9 Fixing means 10 Collection container 11 Dehumidifying room 12 Vertical axis 13 Protruding piece 13a End face 14 Joint 15 Bearing 16 Vertical axis 17 Motor pulley 18 Relay pulley 19 Belt 20 Rotation sensor 21 Control device 22 Operation panel 23 Protrusion 24 Vertical axis for rice milling 25 Other side joint 26 Motor shaft 27 Protrusion 28 Lath net 29 Inclined surface

Claims (3)

A mortar-shaped rice milling container having a porous wall for removal and having a lower peripheral wall whose inner diameter is smaller than that of the upper end portion, and a collecting container surrounding the mortar-shaped rice milling container are arranged in a substantially cylindrical outer frame. And detachably housed, and covering the open upper portion with a lid, a vertical axis provided with a stirring protrusion at the center of the bottom of the mortar-shaped rice milling container, below the outer frame, In a domestic rice milling machine having a built-in driving means for driving the vertical axis, a plurality of protrusions bulged by press working are formed on the inner peripheral wall of the cylindrical portion of the mortar-shaped rice milling container. A rice milling machine for home use, characterized in that substantially the center in the direction intersects with the lower edge extension line of the stirring protrusion and is provided at equal intervals in the circumferential direction of the cylindrical portion. The size of the projection is 10-20 mm in the circumferential width of the cylindrical portion, 7.0-10 mm in height of the projection, and 1.0-2.0 mm in the thickness in the center direction. 2. The domestic rice milling machine according to claim 1, wherein a gap between the protruding portion and the end face of the stirring protrusion is formed to be 5.0 to 6.0 mm. The household rice mill according to claim 1 or 2, wherein the number of the protrusions is a multiple of the number of blades of the stirring protrusion.

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