JPS6330493Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rice milling machine that efficiently and automatically mills polished rice without impairing its quality.

Figure 1 shows the configuration of a conventional general circulating rice mill. 1 is a hopper, 2 is a grain feeding roll chamber connected to the hopper 1, and 3 is a rice milling motor (hereinafter referred to as the main motor) connected via a transmission belt 4. 6 is a resistor located in the circulation path,
The projection amount l is configured to change by operating the manual knob 7.

In the above configuration, the grains (paddy, brown rice) in the hopper 1 are forcibly circulated by the rice feed rolls 3 as shown by the arrow. At this time, rice is polished by friction between the rolls 3 and the grains. The resistor 3 acts as a circulation load for grains, and the polishing power changes depending on the magnitude of its protrusion l.

Figure 2 shows the current change of the main motor 5.
Figures a, b, and c show model numbers, and the protruding dimension l of the resistor 6 is a parameter. For example, in the case of model a, if the protruding dimension l is adjusted twice with the manual knob during milling and stabilized, this method is the standard method.

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.The current of the main motor 5 is smaller than that of model a in the stable region, but in the initial stage of rice milling, the main motor 5 5 is under an unreasonable load.

In model C, the protruding size of the resistor 6 is significantly increased and no adjustment is made during the process, and a significant unreasonable load is applied to the main motor 5, and abnormal pressure is also applied to the grains, which is not a normal rice milling operation.

In addition, in Fig. 2, the degree of refinement at the time when models a, b, and c enter the stable region is
Model B has a 5-minute grind, model a has a 6-minute grind, and model C has a grind of about 8 minutes.
It can be seen that there is a correlation.

As is clear from the above explanation, conventional rice milling machines have the following drawbacks.

B) Refining power decreases over time, making it inefficient and requiring a long time.

(b) In order to correct 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.

C. Adjustment of the resistor is difficult because it is done based on human experience and intuition, and in some cases, the main motor may be overloaded and burnt out. Also, if excessive force is applied to the grains, there is a risk of cracks or scratches, resulting in a decrease in quality.

D. When milling paddy, the main motor current changes are larger than when milling brown rice, making it more troublesome to adjust the resistor in the process.

The present invention has been devised in view of the above-mentioned drawbacks of the conventional art, and one embodiment of the present invention will be described below with reference to FIGS. 3 to 5.

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 the figure, 1 is a hopper, 8 is a resistor connected to a position adjustment motor (hereinafter referred to as an auxiliary motor) 10 via a coupling 9, and the protrusion amount l changes as the auxiliary motor 10 is driven. . Note that 11 is a projection for preventing rotation of the resistor 8, and 12 is a support base.

FIG. 4 shows a circuit configuration, in which 13 is an oscillation circuit, 14 is a drive circuit that drives the auxiliary motor 10 by the output of the oscillation circuit 13, and the auxiliary motor 10
The structure is such that the protrusion dimension l becomes larger when the actuator is operated.

Figure 5 shows the current change of the main motor 5.
In the figure, a is a 5-minute pounding model, and b is a 7-minute pounding model. Also, the upper dotted line is the timer operation of the auxiliary motor 10, which uses the start of rice milling as the time reference for the oscillation circuit 13, and is turned off for _T1 , after which the milling power decreases.
T ON for ₂ hours when the main motor current value falls below the specified value
do. This is repeated for two cycles in the same state as the conventional example model a in FIG. 2, and this is automatically performed by a timer operation. As a result, the current change of the main motor 5 becomes as shown in FIG. still,
It is clear that by shortening the OFF and ON times of the auxiliary motor 10 and increasing the number of operation cycles, the change in the current of the main motor 5 will be reduced.

Since the present invention is configured as described above, when the rice polishing power decreases over time and the rice polishing motor current value falls below a predetermined value, the oscillation circuit is activated to drive the drive circuit.

The drive device is activated by the drive of this drive circuit,
Move the resistor and increase the whitening power.

More specifically, the present invention has the following great effects.

B. Automatically adjusts rice polishing to a certain level according to the hardness of the grain, allowing for efficient rice milling work.

(2) Both rice and brown rice varieties can be milled with automatic adjustment, and there is great potential for labor savings.

C. No excessive force is applied to the grains, and the quality of the polished rice is not impaired.

[Brief explanation of the drawing]

Fig. 1 is a schematic cross-sectional view of a conventional circulating rice mill, Fig. 2 is a current variation diagram of the rice milling motor of the same rice mill, and Fig. 3 is a schematic diagram of the resistor section of the rice mill according to the embodiment of the present invention. FIG. 4 is a block diagram showing the configuration of the drive circuit for the resistor, and FIG. 5 is a diagram showing changes in current of the main motor. 1... hopper, 8... resistor, 10... drive device (position adjustment motor), 13... oscillation circuit,
14...Drive circuit.

Claims (1)

[Claims for Utility Model Registration] 1. In a circulating rice milling machine in which a resistor for adjusting grain polishing power is movably provided in a hopper or circulation path, a drive for moving the resistor to increase the polishing power. 1. A circulating rice milling machine, comprising: a device; a drive circuit that drives the drive device; and an oscillation circuit that drives the drive circuit when a rice milling motor current value is below a predetermined value. 2. The circulating rice milling machine according to claim 1, wherein the oscillation circuit drives the drive circuit intermittently.