Rice mill

Abstract

The rice milling machine of the present invention is provided with a resistance plate (71) in a rice milling chamber (S1) formed between a rice milling roller (63) and a bran removal cylinder (64). The resistance plate (71) blocks the movement of grains (M1) that rotate with the rotation of the rice milling roller (63) to remove bran from the surface, and applies resistance to the grains (M1). A rotating drive shaft (72) extending along the center line (C1) of the rice milling roller (63) is provided on the side of the resistance plate (71). The action conversion mechanism (10) is respectively linked to the forward and reverse rotation actions of the rotating drive shaft (72), so that the resistance plate (71) moves forward or backward relative to the rice milling chamber (S1).

Description

Technical Field

[0001] The present invention relates to a grain milling machine for removing bran from the surface of grains by the rotation of a grain polishing roll. Background Art

[0002] In the past, for example, Patent Document 1 discloses a rice milling machine, which includes: a whitening roller with a center line facing the up-down direction, a bran removal cylinder that surrounds the whitening roller and forms a whitening chamber with the whitening roller, and a plurality of resistance plates arranged at a position where a gap is formed between the front end portion of the whitening chamber and the whitening roller. Grains supplied from above to the whitening chamber contact the resistance plates and rotate with the rotation of the whitening roller, so that the surface of the grains is ground and falls to remove the bran. Two knob bolts are provided at a predetermined interval in the up-down direction on the back side of each resistance plate. When adjusting the position of the resistance plate, each resistance plate moves forward along the radial direction of the whitening roller by tightening each knob bolt respectively, so that the front end portion approaches the whitening roller, or each resistance plate moves backward by loosening each knob bolt respectively, so that the front end portion leaves the whitening roller.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent No. 6090064 Summary of the invention

[0006] -Problems to be solved by the invention-

[0007] However, in Patent Document 1, when adjusting the position of the resistance plate, two knob bolts need to be operated one by one, which leads to the problem that the position adjustment of the resistance plate is time-consuming. In addition, if the two knob bolts are operated one by one, it is difficult to adjust the gap between the front end of the resistance plate and the whitening roller to be constant in the vertical direction. In order to adjust the position of the resistance plate, the operator must visually confirm the state of the gap between the front end of the resistance plate and the whitening roller when the rice milling machine is stopped and operate each knob bolt at the same time, which also leads to the problem of poor work efficiency.

[0008] The present invention is completed in view of the above points, and its purpose is to provide a rice milling machine, which can easily adjust the position of the resistance plate in a short time so that the gap between the front end of the resistance plate and the whitening roller is constant in the direction along the center line of the whitening roller.

[0009] -Solutions to solve the problem-

[0010] In order to achieve the above-mentioned purpose, the present invention is characterized in that a mechanism is provided to convert the rotational movement of the rotating drive shaft extending along the center line of the whitening roller into the radial advance and retreat movement of the resistance plate along the whitening roller.

[0011] Specifically, the following technical solution is adopted for a rice milling machine having a plurality of resistance plates inside.

[0012] That is, in the invention of the first aspect, it is characterized in that the rice milling machine includes: a whitening roller, which can rotate around the center line; a bran removing cylinder, which surrounds the whitening roller so that a whitening chamber is formed between the bran removing cylinder and the whitening roller; a resistance member, which is configured to block the movement of grains in the whitening chamber that rotate with the rotation of the whitening roller to remove bran on the surface, and apply resistance to the grains; and a driving member, which drives the resistance member; the resistance member includes: a resistance plate, which is in the shape of a strip extending along the center line; a rotating drive shaft, which extends along the center line and is driven to rotate by the driving member; and a motion conversion mechanism, which is respectively linked to the forward rotation action and the reverse rotation action of the rotating drive shaft, so that the resistance plate moves forward or backward relative to the whitening chamber with the plate surface along the radial direction of the whitening roller.

[0013] The second invention is, in the first invention, characterized in that the action conversion mechanism includes: a hinge component, which is constructed to be able to open and close with a hinge axis extending along the center line as the center, one side is connected to the rotating drive shaft, and the other side is connected to the resistance plate; and a guide component, which has a guide hole that passes through the radial direction of the whitening roller; the action conversion mechanism is constructed as follows: through the opening action of the hinge component linked to the forward rotation action of the rotating drive shaft, the guide hole guides the resistance plate to move forward toward the whitening chamber, and through the closing action of the hinge component linked to the reverse rotation action of the rotating drive shaft, the guide hole guides the resistance plate to retreat from the whitening chamber.

[0014] The third invention is, in the first or second invention, characterized in that a plurality of the resistance members are arranged at equal intervals in the circumferential direction around the center line, and the driving member includes: a ring member extending in a ring shape around the center line and capable of rotating around the center line; and a driving force transmission mechanism, which rotates the ring member to one side to cause each of the rotating drive shafts to rotate to one side, and on the other hand, rotates the ring member to the other side to cause each of the rotating drive shafts to rotate to the other side.

[0015] The fourth aspect of the invention is, in the third aspect of the invention, characterized in that the driving force transmission mechanism includes a plurality of rod parts, one ends of the plurality of rod parts are respectively fixed to the rotating drive shaft, and the other ends are respectively connected to the ring parts, and the driving force transmission mechanism is constructed as follows: the rotation of each rod part to one side caused by the rotation of the ring part to one side causes each rotating drive shaft to rotate to one side respectively, and on the other hand, the rotation of each rod part to the other side caused by the rotation of the ring part to the other side causes each rotating drive shaft to rotate to the other side respectively.

[0016] -Effects of the Invention-

[0017] In the first aspect of the invention, the resistance plate is moved forward and backward as a whole by the rotation of a rotating drive shaft, and there is no need to operate multiple positions of the resistance plate when the resistance plate moves forward and backward as in Patent Document 1, so the position of the resistance plate can be adjusted in a short time. In addition, when the driving member rotates the rotating drive shaft forward, the forward rotation is converted by the motion conversion mechanism into a linear motion of the resistance plate, and the resistance plate as a whole moves forward to the radial inner side of the whitening roller without changing its posture relative to the whitening roller, and when the driving member reverses the rotating drive shaft, the reverse rotation is converted by the motion conversion mechanism into a linear motion of the resistance plate, and the resistance plate as a whole moves backward to the radial outer side of the whitening roller without changing its posture relative to the whitening roller. Therefore, the position of the resistance plate can be adjusted in a state where the gap between the front end of the resistance plate and the whitening roller is kept constant in the direction along the center line of the whitening roller only by rotating the rotating drive shaft, so there is no need to stop the rice milling machine to visually confirm the state of the resistance plate in order to adjust the position of the resistance plate, so the position adjustment operation of the resistance plate can be easily performed.

[0018] In the second aspect of the invention, since the motion conversion mechanism is composed of a hinge member, the structure for converting the rotational motion of the rotation drive shaft into the linear motion of the resistance plate is simplified, thereby reducing the component cost and the manufacturing cost. In addition, since the motion conversion mechanism is operated by a relatively simple action, that is, the opening and closing action of the hinge member, when converting the rotational motion of the rotation drive shaft into the linear motion of the resistance plate, the load applied to the rotation drive shaft and the resistance plate is reduced, so that the conversion from the rotational motion of the rotation drive shaft to the linear motion of the resistance plate can be smoothly performed.

[0019] In the third aspect of the invention, when the ring component rotates to one side or the other side, the driving force transmission mechanism causes each rotating drive shaft to rotate in the same direction and at the same rotation angle. Therefore, the positions of multiple resistance plates arranged in the rice milling machine can be adjusted in the same manner at the same time, so that the position adjustment operation of multiple resistance plates arranged in the rice milling machine can be performed without deviation in a short time.

[0020] In the fourth aspect of the invention, since the driving force transmission mechanism is composed of a plurality of rod members, the structure for rotating the rotation drive shafts simultaneously in the same direction is simplified, thereby reducing component costs and manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a perspective view of a rice milling machine according to an embodiment of the present invention.

[0022] Figure 2 yes Figure 1 Enlarged view of part II.

[0023] Figure 3 1 is a top view of a rice milling machine according to an embodiment of the present invention.

[0024] Figure 4 yes Figure 2 Cross-sectional view at line IV-IV.

[0025] Figure 5 yes Figure 2 Sectional view at line VV.

[0026] Figure 6 yes Figure 5 Diagram viewed from VI arrow.

[0027] Figure 7 yes Figure 5 Enlarged view of part VII.

[0028] Figure 8 It is shown Figure 7 This is a diagram showing the state after adjusting the resistance plate position.

[0029] Fig. 9 yes Figure 7 Magnified view of section IX. DETAILED DESCRIPTION

[0030] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the following description of the preferred embodiments is merely illustrative in nature.

[0031] Figures 1 to 3 1 shows a grinding type vertical rice milling machine 1 according to an embodiment of the present invention. The rice milling machine 1 comprises: a main body shell 2 in a substantially hexagonal shape, a first drive motor 3 provided with the main body shell 2, and a base frame 4 supporting the main body shell 2 and the first drive motor 3, and a grain supplying part 2a for supplying grains to the inside of the main body shell 2 is provided on the upper part of the main body shell 2.

[0032] like Figure 4As shown, a main shaft 5 is provided at approximately the center of the main body shell 2. The main shaft 5 extends up and down and is driven to rotate by the first drive motor 3. A grinding unit 6 is installed on the main shaft 5 for grinding the surface of the grains supplied from the grain supply part 2a.

[0033] The grinding unit 6 includes a triangular pyramid-shaped guide body 61 mounted on the upper portion of the spindle 5 and a substantially disc-shaped feed roller 62 disposed below the guide body 61 and having a thickness mounted on the spindle 5 .

[0034] The outer diameter of the feed roller 62 is larger than the outer diameter of the guide body 61 , and a plurality of blade members 62 a are provided on the outer peripheral surface of the feed roller 62 at predetermined intervals.

[0035] A substantially cylindrical whitening roller 63 is installed below the feed roller 62 . The whitening roller 63 is installed on the main shaft 5 , and the center line C1 of the whitening roller 63 is oriented in the up-down direction.

[0036] The outer diameter of the whitening roller 63 is substantially the same as that of the feed roller 62 , and the whitening roller 63 includes a ring-shaped grinding disc 63 a having grinding stone abrasive grains attached to the outer peripheral surface, and a plurality of the grinding discs 63 a are stacked in the vertical direction.

[0037] The whitening roller 63 is surrounded by a bran removing cylinder 64 whose cylinder center line is oriented in the up-down direction, and a whitening chamber S1 is formed between the bran removing cylinder 64 and the whitening roller 63 .

[0038] like Figure 5 As shown, the bran removing cylinder 64 includes four support portions 65 (guide members) arranged at equal intervals around the cylinder center line, and four metal mesh portions 66 arranged between the support portions 65 and having an arc shape in a plan view.

[0039] like Figures 6 to 8 As shown, the support portion 65 is in the shape of a roughly square cylinder extending up and down, and has a receiving space S2 inside. The support portion 65 includes: a first plate-shaped frame 65a and a second plate-shaped frame 65b extending parallel to each other along the radial direction of the bran removal cylinder 64, and a third plate-shaped frame 65c extending from the side end of the whitening roller 63 of the second plate-shaped frame 65b to the first plate-shaped frame 65a.

[0040] The extended end side of the third plate-shaped frame 65c has a sharp shape in which the plate thickness gradually narrows as it moves toward the end, and a slit-shaped guide hole 65d is formed at the extended end of the third plate-shaped frame 65c. The guide hole 65d extends in the up-down direction between the third plate-shaped frame 65c and the first plate-shaped frame 65a and is connected to the accommodation space S2.

[0041] That is, the support column 65 is provided with a guide hole 65 d penetrating in the radial direction of the whitening roller 63 .

[0042] On the other hand, Figure 5 As shown, a mesh 66 a made of stainless steel is provided on the whitening roller 63 side of each metal mesh portion 66 .

[0043] like Fig. 9 As shown, the screen 66a includes a screen body 66b that is arc-shaped when viewed from above and a pair of flanges 66c that are roughly L-shaped in cross-section. The flanges 66c are arranged at both ends of the screen body 66b in the arc direction, and each flange 66c is fixed to each support column 65.

[0044] The screen body 66b is integrally formed by press molding, and a plurality of mounting recesses 66e are formed at predetermined intervals in the up-down direction on the surface of the whitening roller 63 near both ends in the arc direction.

[0045] The flange portion 66c is integrally formed by press forming and fixed to the position of the mounting recess 66e of the screen body 66b by a plurality of rivets 66f. That is, the screen body 66b and the flange portion 66c are integrated by riveting each rivet 66f from the side of each mounting recess 66e of the screen body 66b, thereby making it possible to easily manufacture the screen 66a.

[0046] like Figures 6 to 8 As shown, the resistance mechanism 7 (resistance member) is disposed in the accommodation space S2 of each support portion 65. That is, four resistance mechanisms 7 are disposed at equal intervals in the circumferential direction around the center line C1.

[0047] The resistance mechanism 7 is in the shape of a strip extending in the up-down direction, and includes: a resistance plate 71 whose plate surface extends approximately radially along the bran removal cylinder 64, and a rotating drive shaft 72 with a rectangular cross-section extending in the up-down direction along the rotation axis C2, and the front end side portion of the resistance plate 71 is embedded in the guide hole 65d.

[0048] The rotation drive shaft 72 is disposed in the storage space S2 at a position away from the third plate-shaped frame 65 c . The upper end portion of the rotation drive shaft 72 is in the shape of a round bar and penetrates the upper surface of the main body case 2 to protrude from the main body case 2 .

[0049] A hinge mechanism 73 (hinge member) having a hinge shaft 73 a extending in the up-down direction is disposed between the base end side of the resistance plate 71 and the rotation drive shaft 72 .

[0050] The hinge mechanism 73 is configured to be openable and closable about a hinge shaft 73 a , one side of the hinge mechanism 73 is fixed to a side surface of the rotation drive shaft 72 , and the other side of the hinge mechanism 73 is fixed to a base end side of the resistance plate 71 .

[0051] The support part 65 and the hinge mechanism 73 constitute the action conversion mechanism 10 of the present invention. Figure 7 and Figure 8 As shown, the motion conversion mechanism 10 is constructed as follows: when the rotating drive shaft 72 rotates forward, the guide hole 65d guides the resistance plate 71 to move forward to the grinding chamber S1 through the opening action of the hinge mechanism 73 linked to the forward rotation action of the rotating drive shaft 72, and when the rotating drive shaft 72 rotates reversely, the guide hole 65d guides the resistance plate 71 to move backward from the grinding chamber S1 through the closing action of the hinge mechanism 73 linked to the reverse rotation action of the rotating drive shaft 72.

[0052] That is, the motion conversion mechanism 10 is linked to the forward and reverse rotations of the rotary drive shaft 72 , so that the resistance plate 71 moves forward or backward relative to the whitening chamber S1 with the plate surface along the radial direction of the whitening roller 63 .

[0053] like Figure 2 and Figure 3 As shown, a driving mechanism 8 (driving means) for driving each resistance mechanism 7 is disposed above the main body case 2 .

[0054] The driving mechanism 8 includes a ring member 8a that extends in a ring shape around the grain supply portion 2a with the center line C1 as the center and is located inside the resistance mechanisms 7. The ring member 8a is rotatable to one side and the other side with the center line C1 as the center.

[0055] Four pins 8 b protruding upward are provided at positions of the ring member 8 a corresponding to the resistance mechanisms 7 .

[0056] A second drive motor 8c is disposed on the upper surface of the main body case 2 at a position corresponding to the ring member 8a on the first drive motor 3 side. The second drive motor 8c drives the ring member 8a to rotate about the center line C1 via a pin gear.

[0057] A rod member 8d is disposed between the upper end of each rotation drive shaft 72 and the ring member 8a, and each rod member 8d and each pin 8b constitute a driving force transmission mechanism 9 of the present invention.

[0058] One end of each rod member 8d is fixed to the upper end of each rotation drive shaft 72, and a slit portion 8e extending along the rod member 8d is formed on the other end side of each rod member 8d.

[0059] The pins 8b corresponding to the slit portions 8e are slidably fitted into the slit portions 8e, thereby connecting the ring member 8a and the other end sides of the rod members 8d.

[0060] The driving force transmission mechanism 9 drives the second driving motor 8c to rotate the ring member 8a to one side, so that each pin 8b is guided by the slit portion 8e and pushes the other end side of each rod member 8d to one side, thereby rotating each rod member 8d to one side, and each rotation drive shaft 72 is rotated to one side by the rotation action of each rod member 8d to one side. On the other hand, the driving force transmission mechanism 9 drives the second driving motor 8c to rotate the ring member 8a to the other side, so that each pin 8b is guided by the slit portion 8e and pushes the other end side of each rod member 8d to the other side, thereby rotating each rod member 8d to the other side, and each rotation drive shaft 72 is rotated to the other side by the rotation action of each rod member 8d to the other side.

[0061] Then, when the grains M1 are supplied from the grain supplying section 2a while the first driving motor 3 is rotating the whitening roller 63, Figure 4 As shown, the grain M1 is guided by the guide body 61 and the feed roller 62 and falls into the whitening chamber S1, and contacts the grinding wheels 63a of the whitening roller 63 and rotates with the rotation of the whitening roller 63, so that the surface of the grain M1 is ground and falls, and the bran is removed. At this time, the resistance plate 71 of the resistance mechanism 7 blocks the movement of the grain M1 rotating and falling with the rotation of the whitening roller 63 and applies resistance to the grain M1. The second drive motor 8c drives each rotation drive shaft 72 to rotate to adjust the position of each resistance plate 71 to change the resistance applied by each resistance plate 71 to the grain M1.

[0062] As described above, according to an embodiment of the present invention, the resistance plate 71 is moved forward and backward as a whole by the rotation of a rotating drive shaft 72, and there is no need to operate multiple positions of the resistance plate when the resistance plate is moved forward and backward as a whole as in Patent Document 1, so the position of the resistance plate 71 can be adjusted in a short time.

[0063] In addition, when the driving mechanism 8 rotates the rotating drive shaft 72 forward, the forward rotation motion is converted by the motion conversion mechanism 10 into a linear motion of the resistance plate 71, and the resistance plate 71 as a whole moves forward to the radial inner side of the whitening roller 63 while maintaining its posture relative to the whitening roller 63. On the other hand, when the driving mechanism 8 rotates the rotating drive shaft 72 reversely, the reverse rotation motion is converted by the motion conversion mechanism 10 into a linear motion of the resistance plate 71, and the resistance plate 71 as a whole moves backward to the radial outer side of the whitening roller 63 while maintaining its posture relative to the whitening roller 63. Therefore, the position of the resistance plate 71 can be adjusted while maintaining a constant gap between the front end of the resistance plate 71 and the whitening roller 63 in the direction along the center line C1 of the whitening roller 63, only by rotating the rotating drive shaft 72. Therefore, there is no need to stop the rice milling machine 1 to visually confirm the state of the resistance plate 71 in order to adjust the position of the resistance plate 71, so that the position adjustment operation of the resistance plate 71 can be performed simply.

[0064] Furthermore, since the motion conversion mechanism 10 is constituted by the hinge mechanism 73 , the structure for converting the rotational motion of the rotation drive shaft 72 into the linear motion of the resistance plate 71 is simplified, thereby reducing component costs and manufacturing costs.

[0065] In addition, since the motion conversion mechanism 10 is operated by utilizing a relatively simple action, namely the opening and closing action of the hinge mechanism 73, when the rotational action of the rotational drive shaft 72 is converted into the linear action of the resistance plate 71, the load applied to the rotational drive shaft 72 and the resistance plate 71 is reduced, thereby enabling smooth conversion from the rotational action of the rotational drive shaft 72 to the linear action of the resistance plate 71.

[0066] In addition, when the ring component 8a rotates to one side or the other, the driving force transmission mechanism 9 causes each rotating drive shaft 72 to rotate in the same direction and at the same rotation angle, so that the positions of multiple resistance plates 71 arranged in the rice milling machine 1 can be adjusted in the same way at the same time, thereby being able to adjust the positions of multiple resistance plates 71 arranged in the rice milling machine 1 without deviation in a short time.

[0067] Furthermore, since the driving force transmission mechanism 9 is composed of a plurality of rod members 8 d , the structure for rotating the respective rotation drive shafts 72 simultaneously in the same direction is simplified, and thus the component cost and the manufacturing cost can be reduced.

[0068] In the embodiment of the present invention, four resistance mechanisms 7 are arranged around the center line C1 , but one to three resistance mechanisms may be arranged, or five or more resistance mechanisms may be arranged.

[0069] In the embodiment of the present invention, the hinge mechanism 73 is used as the motion conversion mechanism 10, but other structures may be used as long as the rotational motion of the rotation drive shaft 72 can be converted into the linear motion of the resistance plate 71, for example, a cam mechanism may be used.

[0070] In addition, in an embodiment of the present invention, a plurality of rod components 8d are used as a driving force transmission mechanism 9 to transmit the driving force of the second driving motor 8c to each rotating driving shaft 72. However, as long as the driving force of the second driving motor 8c can be transmitted to each rotating driving shaft 72, other structures may also be used, such as a cam mechanism.

[0071] It should be noted that the resistance mechanism 7 and the driving mechanism 8 of the embodiment of the present invention are applicable to the grinding type rice milling machine 1, but are not limited thereto, and can also be applicable to the friction type rice milling machine. Furthermore, the resistance mechanism 7 and the driving mechanism 8 of the embodiment of the present invention are applicable to the vertical rice milling machine 1, but are not limited thereto, and can also be applicable to the horizontal rice milling machine.

[0072] -Industrial Applicability-

[0073] The invention is suitable for a rice milling machine which utilizes the rotating action of a whitening roller to grind the surface of grains to remove bran.

[0074] -Explanation of symbols-

[0075] 1: Rice mill

[0076] 7: Resistance mechanism (resistance component)

[0077] 8: Driving mechanism (driving component)

[0078] 8a: Ring component

[0079] 8d: Rod assembly

[0080] 9: Driving force transmission mechanism

[0081] 10: Motion conversion mechanism

[0082] 63: Whitening roller

[0083] 64: Bran removal cylinder

[0084] 65: Support column (guide member)

[0085] 65d: Guide hole

[0086] 71: Resistance plate

[0087] 72: Rotating drive shaft

[0088] 73: Hinge mechanism (hinge component)

[0089] 73a: Hinge axis

[0090] S1: Whitening Room

Claims

1. A rice milling machine, characterized in that: The rice milling machine comprises: a whitening roller, which can rotate around a center line; a bran removal cylinder, which surrounds the whitening roller so that a whitening chamber is formed between the bran removal cylinder and the whitening roller, and the cylinder center line of the bran removal cylinder faces the up-down direction; a resistance member, which is configured to block the movement of the grains in the whitening chamber that rotate with the rotation of the whitening roller to remove the bran on the surface, and apply resistance to the grains; and a driving member, which drives the resistance member; The bran removal cylinder comprises: a plurality of support parts arranged at equal intervals around the center line of the cylinder, and metal mesh parts respectively arranged between the support parts. The support part is in the shape of a cylinder extending up and down with a receiving space inside, and is provided with a guide hole penetrating along the radial direction of the whitening roller. The resistance member is arranged in the accommodation space of the support column. The resistance member includes: a resistance plate in the shape of a strip extending along the center line, and the front end side portion is inserted into the guide hole; a rotating drive shaft extending along the center line and driven to rotate by the driving member; and an action conversion mechanism, which is respectively linked to the forward and reverse rotation actions of the rotating drive shaft, so that the resistance plate moves forward or backward from the guide hole relative to the whitening chamber in a posture where the plate surface is along the radial direction of the whitening roller. The resistance member is provided in plurality at equal intervals in the circumferential direction around the center line. The driving member includes: a ring member extending in a ring shape with the center line as the center and being rotatable with the center line as the center; and a driving force transmission mechanism, wherein the ring member rotates to one side to rotate each of the rotation drive shafts to one side, and the ring member rotates to the other side to rotate each of the rotation drive shafts to the other side. The whitening roller and the resistance plate are arranged inside the main body shell. A grain supply unit for supplying grains to the interior of the main body shell is provided on the upper portion of the main body shell. The ring member is disposed above the main body case, and extends in a ring shape around the grain supplying portion with the center line as a center.

2. The rice milling machine according to claim 1, characterized in that: The motion conversion mechanism includes: a hinge member configured to be openable and closable around a hinge axis extending along the center line, one side of which is connected to the rotation drive shaft and the other side of which is connected to the resistance plate; and the support column; The motion conversion mechanism is constructed as follows: the guide hole guides the resistance plate to move forward toward the grinding chamber through the opening action of the hinge component linked to the forward rotation action of the rotating drive shaft, and the guide hole guides the resistance plate to move backward from the grinding chamber through the closing action of the hinge component linked to the reverse rotation action of the rotating drive shaft.

3. The rice milling machine according to claim 1, characterized in that: The driving force transmission mechanism includes a plurality of rod members, one end of each of the plurality of rod members is fixed to the rotation drive shaft, and the other end of each of the plurality of rod members is connected to the ring member. The driving force transmission mechanism is constructed as follows: the rotation of the ring member to one side causes the rod members to rotate to one side, so that the rotation drive shafts rotate to one side respectively; on the other hand, the rotation of the ring member to the other side causes the rod members to rotate to the other side, so that the rotation drive shafts rotate to the other side respectively.

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