JPS631461A - Rice refining machine and method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rice milling machine and a rice milling method that automatically mill rice at high efficiency without impairing the quality of polished rice. FIG. 1 shows the configuration of a conventional general circulation rice milling machine, in which 1 is a hopper, 2 is a grain feeding roll chamber communicating with the hopper 1, and 3 is a rice milling motor 5 connected via a transmission belt 5. The rice feeding roll 6 driven by the rice feeding roll 6 is configured so that the amount of protrusion 1 can be changed by operating a manual knob 8 using a resistor located in a circulation path 7. In the above configuration, grains (paddy, brown rice) in hopper 1
The grains are forcibly transferred from the inlet side to the outlet side 7 by the grain feeding rolls 3. At this time, rice is polished by friction between the grain feed roll 3 and the grains. The resistor 6 acts as a grain polishing load and its protrusion amount 1
Refining power changes depending on the size of. In other words, when the protrusion amount I is small, the grain milling load is small, the pressure applied to the grains in the outlet side 7 and the grain feeding roll chamber 2 is small, the friction between the rolls 3 and the grains is small, and the milling force is also small. On the other hand, if the protrusion amount 1 is large, the grain milling load will be large;
The pressure applied to the grains in the outlet side 7 and in the grain feeding roll chamber 2 is large, the rRl friction between the rolls 3 and the grains is also large, and the polishing force is also large. Figure 2 shows the changes in pressure applied to the grains in the three rice milling methods using the rice milling machine described above. b and c indicate the model number, and the protruding dimension l of the resistor 6 is a parameter. For example, in the case of model a, the protrusion dimension 1 is adjusted twice during rice milling to ensure a stable welding, and this method is standard usage.

In model b, the initial protrusion amount of the resistor 6 is made larger than in model a, and the protrusion amount is not adjusted during the process, and the polishing force applied to the grain is smaller than that in model a in the stable region, but the polishing force applied to the grain is applied to the grain in the initial stage of milling. The milling power is large, that is, the grain milling load is large, and an unreasonable load is placed on the rice milling motor 5. In model C, the protrusion dimension of the resistor 6 is significantly increased and the protrusion amount is not adjusted midway through, and an abnormal polishing force is applied to the grains, and a significant unreasonable load is applied to the rice milling motor 5, making it impossible to perform normal rice milling operations. do not have. In addition, in FIG. 2, model a. The degree of milling at the time of entering the stable region of b and C is 5 minutes milled for model b, 6 minutes milled for model a, and 8 minutes milled for model C, and the degree of milling and grain The polishing force applied to and the protrusion dimension 1 of the resistor 6 are:
It can be seen that there is a correlation. As is clear from the above explanation, conventional rice milling machines and rice milling methods using such rice milling machines have the following drawbacks. 1》The whitening power decreases over time, making it inefficient and requiring a long time. 2) To compensate for the decrease in polishing power, it is necessary to manually adjust the protrusion amount of the resistor several times during the process, and hand-held operation is impossible. 3) Adjusting the protrusion 1 of the resistor to 11 is difficult because it is done based on human experience and intuition, and in some cases, the rice polishing motor may be overloaded and an overcurrent may flow, resulting in jA loss. Additionally, if grains are subjected to excessive stress, they may crack or become scratched, leading to a decline in quality. 4) When polishing paddy, the change in polishing power applied to the paddy is greater than that for brown rice, making adjustment of the resistor during the process even more troublesome. 5) When the material grain is changed, the hardness of the grain differs depending on the variety, moisture content, etc., so it is necessary to adjust the resistor for each rice milling process using experience and intuition. The present invention has been made in view of the above-mentioned conventional drawbacks.
An embodiment of the present invention will be described below with reference to FIGS. 3 to 51A. FIG. 3 shows the structure of the resistor section, which is a feature of the present invention, and corresponds to section A in FIG. 1. In Fig. 3, 1 is a hot bar, 9 is a coupling 1
A resistor connected to the position adjustment motor 11 via 0,
The protruding fil changes as the motor 11 is driven. Note that 12 is a protrusion for stopping the rotation of the resistor 9. FIG. 4 shows the configuration of the circuit 28, in which 13 is a milling power sensor, 14 is a conversion circuit that converts the output of the milling power sensor 13 into voltage, and 15 is a voltage conversion value and adjustment of the output of the milling cassette 13. A comparison circuit 16 compares the whitening power setting reference voltage which can be adjusted with a dial (not shown).
A positive feedback circuit 17 is a drive circuit that drives the position adjustment motor 11 using the output of the comparison circuit 15. FIG. 5 shows changes in the pressure applied to the grain. When the adjustment dial is model a, when rice milling starts, the pressure applied to the grain gradually decreases over time, and when it reaches level L1, the comparison circuit 15 in FIG. is output, the protrusion amount l of the resistor 9 that rotates the position adjustment motor 11 in the forward direction increases, and the pressure applied to the grain increases. However, when level L2 is reached, the output of the comparator circuit 15 disappears, and the position adjustment motor 1
1 stops. This cycle is repeated to complete the rice polishing. When the adjustment dial is model B, the amount of protrusion l of the resistor 9 is smaller than that of model a, and the cleaning power is reduced. As is clear from the above explanation, the rice milling machine and rice milling method of the present invention have the following great effects. 1) It is possible to always mill rice at a constant level according to the hardness of the grain through automatic adjustment, allowing for highly efficient rice milling work. 2》The quality of both paddy and brown rice can be milled automatically, saving labor. 3) No excessive force is applied to the R product and the quality of the polished rice is not impaired. Although the illustrated circulating rice milling machine has been described above, the present invention is not limited thereto.
It has a similar effect by detecting white flour load.

[Brief explanation of the drawing]

Fig. 1 is a schematic cross-sectional view of a conventional circulating rice milling machine, Fig. 2 is a diagram of changes in pressure applied to grains during milling in the same rice milling machine, and Fig. 3 is a rice milling machine according to an embodiment of the present invention. Fig. 4 is a block diagram showing the circuit configuration of the rice milling machine, and Fig. 5 is a diagram showing changes in pressure applied to grains.

Claims (6)

[Claims] (1) In a rice milling machine that is provided with a movable resistor for adjusting the grain polishing power on the exit side of the grain feeding roll chamber, a conversion circuit that converts the detected output of the grain polishing power into voltage, and this conversion A comparison circuit that compares the output voltage of the circuit with a reference voltage for setting the milling power, and a drive circuit that uses the output of the comparison circuit to drive a drive source connected to the resistor, Rice polishing machine that moves the resistor intermittently according to the high bottom (2) The rice milling machine according to claim 1, wherein the rice milling machine provided with a movable resistor for adjusting the polishing power of the grain is a one-time rice milling machine. (3) The rice milling machine according to claim 1 or 2, wherein the grain polishing power is the grain polishing load. (4) In a rice milling method in which the milling power of a rice milling machine in which a resistor is movably provided on the exit side of the grain feeding roll chamber is adjusted stepwise during milling, the milling power is converted into voltage by a voltage conversion circuit, A comparator circuit compares this output voltage with a reference voltage for setting the desired polishing power, and the output from the comparator circuit drives a drive source connected to the resistor to control the resistor according to the polishing power. Rice milling method characterized by intermittent movement (5) The rice milling method according to claim 4, wherein the rice milling machine in which a resistor is movably provided on the exit side of the grain feeding roll chamber is a one-time rice milling machine. (6) The rice milling method according to claim 4 or 5, wherein the milling power of the rice milling machine is the milling load of the rice milling machine.