JPH04131141A - Rice milling machine - Google Patents

Abstract

PURPOSE:To provide a mechanical structure of such a design as to allow only a low spring pressure to be used adequately for obtaining the same hulling accuracy by energizing an opening control member with a spring in a direction where a polished rice delivery aperture is blocked and making the pressure-receiving surface of the member inclined as low as the periphery. CONSTITUTION:A polished rice delivery apertus forming member 10 is arranged at one end of a polishing cylindrical part 3 where a polishing roll 11 is arranged along an axial core direction. In addition, an opening control member 15 is provided, the external surface of which has an appropriate width in the axial core direction of a polishing cylindrical part 3 and is located at the inner periphery of the polished rice delivery aperture forming member 10, and at the same time, moves in the axial core direction of the polishing cylindrical part 3 to adjust the opening of a polished rice delivery aperture 20. Further, an opening control member 15 is energized by a spring 33 in a direction where the polished rice delivery aperture 20 is blocked. The opening control member 15 moves resisting the energizing force of the spring 33 following an increase in the internal pressure of the polishing cylindrical member 15. Also the pressure-receiving surface of the opening control member 15 becomes inclined as low as the external periphery. Thus structurally only a low spring force is adequate for obtaining the same hulling accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rice milling machine for milling brown rice into white rice.

2. Description of the Related Art A conventional rice milling machine generally has a structure as shown in FIG. 5, for example. In FIG. 5, a feed roll 42 and a whitening roll 43 are arranged inside a whitening tube 41, and a regulating plate 45 is provided at an outlet 44 of the whitening tube 41 to regulate the cross-sectional area of the passage.
The spring 46 is biased in the direction of closing the outlet 44 to maintain constant pounding accuracy.

When the feed roll 42 and the whitening roll 43 are rotationally driven by the motor 47 and brown rice is thrown into the whitening tube 41 from the upper part, the brown rice is pushed by the feed roll 42 toward the regulation plate 45.
Rice is polished between a net 48 inside the polishing cylinder 41 and a polishing roll 43 that is being rotated, and the polished rice is discharged from an outlet 44.

Here, if the biasing force of the spring 46 is increased, the polishing [
41's internal pressure increases and the pounding accuracy increases, and when the biasing force is reduced, the internal pressure decreases and the pounding accuracy decreases.

Problems to be Solved by the Invention However, with the configuration shown in FIG. 5, there is a problem in that unless a spring 46 with a large spring pressure is used, the desired pounding accuracy cannot be achieved.

An object of the present invention is to provide a rice milling machine having a structure that requires less spring pressure to obtain the same pounding accuracy.

Means for Solving the Problems The rice polishing machine of the present invention has a polished rice outlet forming member disposed at one end of the polishing tube in which the polishing rolls are arranged along the axial direction, and a rice polishing outlet forming member is provided at one end of the polishing tube in which the polishing rolls are disposed along the axial direction. An opening regulating member is provided that is located on the outer circumferential surface having a width or the inner periphery of the polished rice outlet forming member and moves in the axial direction of the polished rice cylinder part to adjust the opening degree of the polished rice outlet, and closes the polished rice outlet. The opening regulating member is biased by a spring in the direction, and the opening regulating member is configured to move against the biasing force of the spring as the internal pressure of the polishing tube increases, and The feature is that the pressure-receiving surface of the component is an inclined surface that becomes lower toward the outer periphery.

According to this configuration, the internal pressure of the polishing tube acts on the inclined pressure receiving surface of the opening regulating member in a direction perpendicular to the pressure receiving surface through the rice being polished.

Therefore, if we decompose the pressure acting on the pressure-receiving surface into vertical and horizontal components, the vertical component will be smaller than when the pressure-receiving surface is not inclined, and the spring pressure acting against this vertical component will be small. It's just a thing.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4.

In FIG. 1, reference numeral 1 denotes a main body casing, which is constructed by sequentially fitting and connecting an upper casing 2, a polished cylinder part 3, an intermediate casing 4, and a lower bearing casing 5 from the top to the bottom, and fittingly connecting each other. They are constructed so that their axes coincide. Upper casing 2
A screw feeder 6 for feeding brown rice is connected to an opening formed on the upper side of the rice cooker. 7 is a hopper for charging the brown rice, and 8 is a drive motor.

Reference numeral 9 denotes a rotary shaft consisting of a hollow shaft disposed at the axis position over the upper casing 2, the milling cylinder part 3, and the intermediate casing 4. A polishing roll 11 is fitted and mounted approximately corresponding to the cylindrical portion 3. The feed roll 10 and the whitening roll 11 are connected to each other by a connecting pin 12, and are engaged in the circumferential direction with the rotary shaft 9 at a position near the lower end of the whitening roller at a key 13. Further, a cylindrical recess 14 is formed at the lower end of the whitening roll 11, into which a fitting cylinder 16 extending from the upper part of the opening regulating member 15 is fitted so as to be vertically slidable.

The pressure receiving surface 15a of the opening regulating member 15 is formed into an inclined surface that becomes lower toward the outer periphery, as shown in FIG.

The outer circumferential surface 15b of the opening regulating member 15 following the pressure receiving surface 15a is formed into a cylindrical surface having an appropriate width C in the vertical direction.

Inside the polishing cylinder part 3, a net 17 is arranged at an appropriate distance from the outer periphery of the polishing roll 11, and on one side of the lower outer periphery of the polishing cylinder part 3, there is a discharge port 18 for draining the bran generated during rice polishing. It is opened. Further, a polished rice outlet forming member 19 is arranged between the lower end of the polished cylinder portion 3 and the upper end of the intermediate casing 4. The inner periphery of the polished rice outlet forming member 19 is formed into a pointed edge, and a slight gap is left between it and the outer periphery of the opening regulating member 15 having an appropriate width in the vertical direction to prevent rice grains from falling. It has an outsole.

A white rice discharge opening 20 is provided on one side of the upper end of the intermediate casing 4.
A chute 21 is formed and a chute 21 is attached. Also,
A receiving flange 22 is protruded from the rotating shaft 9 for receiving the polished rice that has fallen from the polished rice outlet forming member 19 and guiding it to the chute 21. A support shaft 23 rotatably supported by a pair of upper and lower bearings 24 is disposed in the middle part of the intermediate casing 4.
The lower end of the rotating shaft 9 is fitted and fixed. A torque sensor 25 is arranged in the lower part of the intermediate casing 4, and one end of the torque sensor 25 is fitted to the shaft 25a or the support shaft 23 so as to be slidable only in the axial direction.

A drive shaft 27 rotatably supported by a pair of upper and lower bearings 26 is disposed inside the lower bearing casing 5, and the other end shaft 25b of the torque sensor 25 is attached to the upper end of the drive shaft 27 and is slidable only in the axial direction. A drive pulley 28 is fixed to the lower end of the drive shaft 27 which is fitted into the drive shaft 27 and protrudes downward. This drive boo 928 is configured to be rotatably driven by a motor (not shown) via a drive belt.

An opening adjusting shaft 29 is inserted into the hollow rotating shaft 9, and its lower end is connected to the opening regulating member 15 by a connecting member 30 passing through an elongated hole 31 formed in the rotating shaft 9. . The upper end of the opening adjustment shaft 29 is relatively rotatably engaged with the upper surface of an engaging member 34 supported on the elevating member 32 via a spring 33. The elevating member 32 is configured to be movable up and down by an elevating means 35, and the elevating means 35 is connected to the torque sensor 25.
The drive is controlled by the control means 36 which receives an output signal from the controller.

The lifting means 35 is driven by a drive motor 37 as shown in FIG.
The feed screw shaft 38 is rotatably driven by a feed screw shaft 38, a movable nut body 39 screwed thereto, and a guide rod 40 thereof, and the movable nut body 39 is connected to the elevating member 32.

According to the above configuration, when brown rice is fed into the upper casing 2 from the hopper 7 by the screw feeder 6 while the rotating shaft 9 is rotationally driven by the drive pulley 28 via the drive shaft 27 and the torque sensor 25, the brown rice is pushed into the whitening cylinder part 3 by the feed roll 10, and is polished between the rotating whitening roll 11 and the net 17. The rice bran separated during the whitening process passes through the air introduced into the rotating shaft 9 and through holes (not shown) made in the rotating shaft 9 and the whitening roll 11, and passes through the net 17. The rice bran is discharged to the outside along with the airflow flowing toward the rice bran discharge port 18. The polished white rice is pushed down against the biasing force of the spring 33 by the pressure of the brown rice forced into the space between the net 17 of the polishing cylinder part 3 and the polishing roll 11, and the outer periphery of the opening regulating member 15 is pushed down. The polished rice is sequentially discharged from the annular passage formed between the polished rice outlet forming member 19 and discharged to the outside through the polished rice discharge port 20 and the chute 21.

When the pounding accuracy becomes higher than the set state, the load torque acting on the whitening roll 11 increases, and the output signal from the torque sensor 25 becomes excessive than the set value. Then, the lifting member 32 is lowered by the lifting means 35, the upward biasing force of the opening adjustment shaft 29 by the spring 33 decreases, the opening regulating member 15 descends, the opening increases, and the pounding accuracy is adjusted to be lower. be done. On the other hand, when the gripping accuracy becomes low, the output signal from the torque sensor 25 becomes too small, so the elevating member 32 is raised by the elevating means 35, and the opening regulating member 15 is raised to adjust the opening. It becomes smaller and the accuracy of pounding is adjusted higher. Thus, the pounding accuracy is automatically controlled to the set value.

In addition, at the start of operation or at the end of milling, the supply of brown rice is stopped while the upper casing 2 and milling tube section 3 are filled with brown rice, and in this state, the rotating shaft 9 is rotated for a predetermined period of time to perform milling. When this is done, since the outer peripheral surface of the opening regulating member 15 has a predetermined width in the vertical direction, unmilled rice will not flow out during the milling process, and the The unmilled rice discharged from the milled rice discharge port 20 may be returned to its original state for re-milling, or the milling roll 11 may be
without having to control the opening regulating member 15 in a complicated manner.
Completely milled white rice is discharged. Incidentally, the state in which the rice is completely filled can be detected by the output signal from the torque sensor 25.

Furthermore, as described above, the pressure receiving surface 15a of the opening regulating member 15
3 and 4, it will be explained that by forming the spring 33 into an inclined surface, a small spring pressure can be applied to the spring 33.

FIG. 3 shows the opening regulating member 15 when the pressure receiving surface 15a is not formed as an inclined surface, and FIG. 4 shows the opening regulating member 15 when the pressure receiving surface 15a is formed as an inclined surface as in the above embodiment. Parts 1
It represents 5. Here, the diameters of the two opening regulating members 15 are the same.

When the internal pressure F of the polishing cylinder part 3 acts on the point P of the pressure receiving surface 15a in FIG. The opening regulating member 15 is lowered to a position where the spring pressure is balanced.

On the other hand, when a similar internal pressure F acts on point P of the inclined pressure receiving surface 15a in FIG.
Acts perpendicular to . This force fo can be decomposed into a horizontal component force f1 and a vertical component 2 that tries to push down the opening regulating member 15, and the opening regulating member 15 is caused by this vertical component 2 and the spring. It descends to a position where it balances the splash pressure of 33.

Here, f2 is smaller than fO, and when the pressure receiving surface 15a is inclined as shown in FIG. 4 compared to the case shown in FIG. 3, it only receives component element 2 in the vertical direction with respect to the internal pressure F. Since the spring 33 has a spring pressure, a small spring can be used as the spring 33, and the spring 33 and the lifting member 3
2. It is possible to downsize the punching accuracy adjusting section 49 formed as the engaging member 34.

Effects of the Invention As described above, according to the present invention, the pressure-receiving surface of the opening regulating member for adjusting the opening of the milled rice outlet is a sloped surface with a very low outer periphery. The internal pressure of the polishing tube acts on the inclined pressure receiving surface of the opening regulating member in a direction perpendicular to this pressure receiving surface, and the force that tries to push down the opening regulating member is greater than when the pressure receiving surface is not inclined. The rice milling machine can be constructed using small springs, since it requires less spring pressure to achieve the same pounding accuracy.

[Brief Description of the Drawings] Fig. 1 is a longitudinal sectional front view of a rice milling machine according to an embodiment of the present invention;
Fig. 2 is a side view of the drive mechanism of the opening regulating member, Fig. 3 is a reference diagram for explaining the present invention in detail, Fig. 4 is a side view of the opening regulating member of the device, and Fig. 5 is a side view of the drive mechanism of the opening regulating member. The figure is a schematic diagram of a conventional rice milling machine. 1... Main body casing, 3... Refining cylinder part, 9...
Rotating shaft, ]0... Feed roll, 11... Whitening roll, 15... Opening regulating part, 15a... Pressure receiving surface, 29
...Opening adjustment axis, 33...splash.

Claims (1)

[Claims] 1. A white rice outlet forming member is arranged at one end of the whitening cylinder part in which the whitening roll is arranged along the axial direction, and the outer peripheral surface having an appropriate width in the axial direction of the whitening cylinder part is the polished rice outlet forming member. An opening regulating member is provided that is located on the inner periphery of the polishing cylinder and moves in the axial direction of the milled rice cylinder to adjust the opening of the polished rice outlet, and the opening regulating member is biased by a spring in a direction to close the polished rice outlet. , the opening regulating member is configured to move against the biasing force of the spring as the internal pressure of the polishing cylinder increases, and the pressure receiving surface of the opening regulating member is an inclined surface that becomes lower toward the outer periphery. rice milling machine.