JPS6114870B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a rice milling machine.

In conventional rice milling machines, the whiteness of polished rice is usually adjusted by applying pressure to the milled rice outlet using the repulsive force of a spring or the load of a weight. Furthermore, in order to fully automate a rice milling machine, the applicant has already proposed a system that utilizes the suction force of a solenoid for the above-mentioned pressure. However, in such a rice mill, the load on the rice mill drive motor varies due to the wide variety of brown rice varieties and production areas, and the load conditions on the rice mill drive motor vary when brown rice has an abnormally high moisture content. When milling bad brown rice, if you adjust it to obtain high whiteness, that is, if you increase the pressure applied to the rice milling outlet, it will put an excessive load on the rice mill drive motor, and the rice mill drive motor will If the motor locks up, rice milling efficiency will drop significantly, and if left unchecked, it can cause disasters such as fire. On the other hand, if a motor that can withstand the load is used as a countermeasure against the motor lock, a motor with a considerably large output must be used, reducing practicality.

The present invention aims to provide a rice milling machine that solves the problems of conventional rice milling machines, and the present invention will be described below with reference to the drawings and embodiments.

FIGS. 1 and 2 are a perspective view and a configuration diagram of a main part of a rice polishing machine that uses a solenoid as a rice polishing degree adjusting device, showing one embodiment of the present invention. In the rice milling machine of the present invention, brown rice supplied from a brown rice intake port 11 is sent by a rice milling screw shaft 12 to a rice milling section composed of a rice milling screen 10 and a rice milling shaft 13 where rice is milled, and is located at the tip of the rice milling section. The rice polishing discharge port 9 is equipped with a rice polishing degree adjusting device consisting of a solenoid 6, a plunger 7, and a pressure plate 8 for applying pressure to the brown rice sent to the rice milling section and adjusting whiteness. The device is designed to electrically control the polishing of rice to the desired whiteness.
Furthermore, in the present invention, as shown in the circuit diagram of the principle of the present invention shown in FIG. A current mode relay 4 is provided on the side as a switching means that responds depending on the magnitude of the current. For example, in the current mode relay 4, when a predetermined current flows through the current mode relay (hereinafter, this predetermined current is referred to as on-current), the iron core in the winding is magnetized, attracting the contact plate and opening the contact. Also, when less than a predetermined current flows through the winding (hereinafter, this predetermined current is referred to as off-current), the contacts return to their original closed state. Here, if the rice mill drive motor 1 inserts the contact of the current mode relay 4, which is designed with appropriate off-current and on-current values below the overload input current, between the solenoid 6 and the solenoid power supply 5, When milling brown rice that has poor load conditions for the rice mill drive motor 1 as described above, the load on the rice mill drive motor 1 increases, and when the load input current increases and reaches the off current, the solenoid 6 and solenoid The contacts of the current mode relay 4 inserted between the power supply 5 for the
Power is cut off.

Then, the pressure applied to the rice milling outlet 9 is removed, so the load on the rice milling machine drive motor 1 becomes smaller and the load current decreases. Then, when the on-current is reached, the contacts of the current mode relay 4 are closed again, and the solenoid 6 starts to be energized, and the polished rice discharge port 10 is pressurized. As mentioned above, the solenoid 6 is automatically turned on and off depending on the load, that is, the rice mill drive motor 1
If the load on the rice milling outlet 9 becomes too large,
When the load becomes small, the rice milling outlet 9 is pressurized to continue stable rice milling.

As described above, according to the present invention, it is possible to obtain a stable rice milling machine that can handle a wide variety of brown rice with a relatively low torque motor and does not require motor lock.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a rice polishing level adjusting device showing one embodiment of the present invention using a solenoid, Fig. 2 is a configuration diagram of the same embodiment device, and Fig. 3 is an electric circuit diagram showing the principle of the present invention. be. 1...Rice mill drive motor, 2...Motor capacitor, 3...AC power supply, 4...Current mode relay, 5...Solenoid power supply, 6...Solenoid, 7...Plunger, 8...Additional power supply pressure plate,
9... Rice milling outlet, 10... Rice milling screen, 1
1...Brown rice intake port, 12...Rice milling screw shaft,
13... Rice milling axis.

Claims (1)

[Claims] 1. A switching means that opens and closes depending on the magnitude of the load input current of the rice mill drive motor controls the current supplied to the solenoid that applies a biasing force to the pressure plate installed at the rice mill discharge port. rice milling machine.