JPH04114749A - Rice milling machine - Google Patents

Abstract

PURPOSE:To make the performance of an opening control component smooth and polishing in the initial stage of operation and at the time of completion perfect by providing a projectingly fitting cylindrical section to be fitted in a fitting recessed section formed at one end of a polishing roll on an opening control component and forming its end edge into a projected shape. CONSTITUTION:When polishing accuracy gets higher than the set condition, the loading torque applied to a polishing roll 11 gets larger and an output signal issued from a torque sensor 25 gets larger than the set value, and a lifting component 32 is lowered by a lifting means 35 based on the command from a control means 36 to lower the encouraging force for lifting an opening degree adjusting shaft 29 by means of a spring 33 is lowered to lower an opening control component 15, make the opening degree large and adjust the polishing accuracy lower. On the other hand, when the polishing accuracy gets lower, the output signal issued from the torque sensor 25 gets too small, and the lifting component 32 is lifted by the lifting means 35 and the opening control component 15 is lowered to make the opening degree small and adjust the polishing accuracy high. The upper end of a fitting cylindrical section 16 is of projected shape, and bran attached to the peripheral surface of a cylindrical recessed section 14 of the lower end of the polishing roll 11 can be scraped off at the time of up and down operation of the opening control component 15.

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. 3, for example. In FIG. 3, 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.
a inside the polishing tube 41! The rice is polished between the milling roll 48 and the milling roll 43 which is rotationally driven, and the milled rice is discharged from the outlet 44. Here, when the biasing force of the spring 46 is increased, the internal pressure of the polishing cylinder 41 becomes high and the pounding accuracy becomes high, and when the biasing force is decreased, the internal pressure is decreased and the pounding accuracy becomes low.

However, in the above configuration, at the beginning of operation, when the pressure inside the polishing tube 41 becomes high, the regulating plate 45 is immediately pushed and the outlet 44 is opened, so that the brown rice initially charged is not completely polished. There was a problem in that it was removed before it could be polished, and it was necessary to re-whiten it.

Therefore, as shown in FIG. 4, an opening regulating member 53 is provided that fits on the inner periphery of the polished rice outlet forming member 52 disposed at the outlet end of the polishing cylinder 51, and the outer periphery is adjusted in an appropriate direction in the axial direction. It is formed on the cylindrical outer peripheral surface 54 having a width, and at the beginning of operation or at the end of polishing, the space between the net 56 of the polishing tube 51 and the polishing roll 55 is filled with brown rice, and the supply of brown rice is stopped and the polishing roll is moved for a predetermined period of time. By rotationally driving 55, it is possible to reliably prevent unpolished rice from leaking even if the opening regulating member 53 or the polishing tube 51 is slightly displaced in the axial direction due to the pressure inside the polishing tube 51 during its operation. Previously, a rice milling machine was proposed that is configured to discharge completely polished rice both at the beginning of operation and at the end of milling. In addition, in FIG. 4, reference numeral 59 is the operating shaft of the opening regulating member 53, which is biased in the direction of closing the polished rice outlet as shown by the white arrow, and the opening regulating member 53 resists this biasing force. By moving downward in the figure, polished rice is discharged as shown by the broken line arrow.

Problem to be Solved by the Invention By the way, in the rice milling machine as shown in FIG. In order to avoid this as much as possible and ensure smooth operation, a fitting recess 57 is provided at one end of the polishing roll 55, and a fitting part 58 that fits into the fitting recess 57 is provided protruding from the opening regulating member 53. Is it preferable to do so? With such a configuration, the fitting recess 57 and the fitting portion 5
8, the opening regulating member 53 may not operate smoothly, or the bottom surface of the fitting recess 57 and the fitting portion 5 may become clogged with bran.
There is a risk that bran may accumulate between the opening control member 53 and the end face of the opening limit member 53, and the opening regulating member 53 may gradually move from its initial position, causing unmilled rice to leak out during the milling operation at the beginning of operation or at the end of milling. There was a problem.

The present invention solves the above-mentioned problems, and aims to provide a rice milling machine that can ensure smooth operation of the opening regulating member and can obtain perfectly polished rice both at the beginning of operation and at the end of milling. do.

Means for Solving the Problems In order to solve the above problems, the present invention provides a polished rice outlet forming member at one end of the whitening cylinder section in which the whitening rolls are arranged along the axial direction. An opening regulating member is provided whose outer peripheral surface having an appropriate radius in the axial direction fits into the inner periphery of the polished rice outlet forming member and moves in the axial direction of the polishing cylinder part to adjust the opening degree of the polished rice outlet, This opening regulating member is provided with a protruding fitting cylindrical portion that fits into a fitting recess formed at one end of the whitening roll, and the edge thereof is formed into a pointed shape.

Operation With the above configuration, as the opening regulating member operates, the sharp edge of the fitting cylinder protruding from the opening regulating member prevents the whitening roll that is fitted into the fitting cylinder from being fitted into the fitting cylinder. The bran adhering to the circumferential surface of the mating recess can be scraped off, ensuring smooth operation of the opening regulating member, and also preventing bran from accumulating between the edge of the mating cylinder and the bottom of the mating recess. The function of the opening regulating member can be stably ensured without fear of changing the initial position of the opening regulating member, and completely milled rice can be obtained both at the beginning of operation and at the end of milling.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 and 2.

In Fig. 1, reference numeral 1 denotes a main body casing, which is constructed by fitting and connecting an upper casing 2, a polished cylinder part 3, an intermediate casing 4, and a lower bearing casing 5 in order from the top to the bottom, and fittingly connecting each other. They are configured 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 its axis position over the upper part of the upper casing 2, the milling cylinder part 3, and the intermediate casing 4. A polishing roll 11 is fitted and attached approximately corresponding to the cylindrical portion 3. The feed roll 10 and the whitening roll 11 are connected to each other by a coupling bin 12, and are circumferentially engaged with the rotary shaft 9 at a position near the lower end of the whitening spout 11 or 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 outer peripheral surface of the opening degree regulating member 15 is formed into a cylindrical surface having an appropriate width in the vertical direction.

Further, the fitting cylinder part 16 has an inner circumferential surface tapered downward so that the upper end thereof has a pointed shape, and a space is formed between the fitting cylinder part 16 and the outer circumferential surface of the rotating shaft 9. The bran attached to the circumferential surface of the cylindrical recess 14 at the lower end of the cylindrical recess 14 is scraped off, and the bran is not caught between the bottom surface of the cylindrical recess 14 and the upper end of the fitting cylinder 16.

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 disposed 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 is fitted onto the outer periphery of the opening regulating member 15 having an appropriate width in the vertical direction.

A white rice discharge port 20 is formed on one side of the upper end of the intermediate casing 4, and a chute 21 is attached thereto.

Further, a receiving flange 22 is provided protruding 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 portion of the intermediate casing 4, and the lower end of the rotating shaft 9 is fitted and fixed thereto. A torque sensor 25 is arranged at the lower part of the intermediate casing 4,
One end of the shaft 25a is fitted to 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 so as to be slidable only in the axial direction. A drive pulley 28 is fixed to the lower end of the fitted drive shaft 27 that projects downward. This drive pulley 28 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 the lower end thereof and the opening regulating member 15 are connected 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 a retaining 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 its guide rod 40. 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 urging 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 I9 and discharged to the outside through the polished rice discharge port 20 and the chute 21.

When the precision 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 exceeds the set value, so the command from the control means 36 Then, the elevating member 32 is lowered by the elevating means 35, the upward biasing force of the opening adjustment shaft 29 by the spring 33 is reduced, the opening regulating member 15 is lowered, the opening is increased, and the pounding accuracy is adjusted to be low. Ru. On the other hand, when the pounding 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 pounding precision is adjusted to be 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 milled rice will not flow out during the milling process, and the milled rice will not flow out at the beginning of operation or at the end of milling. The unmilled rice discharged from the discharge 020 may be returned to its original state for re-milling, or the milling roll 11
and without complicated control of the opening degree regulating member 15.
Completely milled white rice or drained. Note that the state in which the rice is just filled can be detected by the output signal from the torque sensor 25.

Further, since the fitting cylinder part I6 extending to the upper part of the opening regulating member 5 has a pointed shape at its upper end, the lower end of the whitening roll 11 is raised and lowered when the opening regulating member 15 moves up and down. The bran adhering to the circumferential surface of the cylindrical recess 14 can be scraped off, the bran is not caught between the bottom of the cylindrical recess 14 and the upper end of the fitting cylinder 16, and the opening regulating member 15 can be scraped off. Since the inner circumferential surface is formed into a Taber surface, the bran is smoothly discharged downward through the space between it and the rotating shaft 9. Therefore, due to the bran caught between the fitting recess 14 and the fitting cylinder 16, the opening regulating member I5 may not operate smoothly.
It is possible to reliably prevent the initial position from shifting downward and causing unmilled rice to overflow during the above-mentioned operations at the start of operation or at the end of milling, thereby preventing the above-mentioned effects from being obtained. There is no such thing as instability.

Further, according to the above configuration, the rotating shaft 9 on which the feed roll 10 and the whitening roll 11 are mounted, the torque sensor 25 and the drive shaft 27 are the same, and the upper casing 2, the whitening cylinder part 3, the intermediate casing 4 and the lower bearing casing 5 are the same. Since it is arranged on the axis of the main body casing 1, which is constructed by fitting and connecting on the axis, it is possible to align them by fitting and connecting them together with the casings that make up the main body casing l in an appropriate procedure. However, it can be assembled extremely easily and with a small number of man-hours.

Effects of the Invention As described above, according to the present invention, the sharp edge of the fitting cylinder protruding from the opening regulating member removes the bran attached to the circumferential surface of the fitting recess of the whitening roll. Since it can be scraped off with the movement of the opening regulating member, smooth operation of the opening regulating member is ensured, and bran does not accumulate between the edge of the fitting cylinder and the bottom of the fitting recess. Since there is no fear that the initial position of the opening regulating member will change due to the opening regulating member, the function of the opening regulating member can be ensured stably, and completely milled white rice can be stably produced over a long period of time both at the beginning of operation and at the end of milling. Demonstrate the effect of being able to obtain.

[Brief explanation of 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 for the opening regulating member, FIG. 3 is a schematic configuration diagram of a conventional example, and FIG. 4 is a longitudinal sectional front view of the main parts of another conventional example. 3... Refining tube part, 11... Refining roll, 14...
Fitting recess, 15... Opening degree regulating member, 16... Fitting cylinder part, 19... Polished rice outlet forming member.

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 forms the white rice outlet forming member. An opening regulating member is provided that fits into the inner periphery of the polishing cylinder and moves in the axial direction of the milling cylinder to adjust the opening of the polished rice outlet. A rice polishing machine in which a fitting cylinder part that fits into a fitting recess is provided protrudingly, and the edge thereof is formed into a pointed shape.