JPH0227714B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an automatic control device for a coin-type rice milling machine. It relates to technology that can automatically stop operation and save labor.

[Prior art and its problems]

As an example of a conventional coin-operated rice milling machine,
- The one published in Publication No. 40920 is known. By inserting a coin into a coin timer, the brown rice transfer shaft and the milling shaft are rotated for a predetermined period of time to automatically supply, mill and discharge a predetermined amount of brown rice. This technology uses a delay timer to delay the rotation of the milling shaft from stopping the rotation of the brown rice transfer shaft, thereby maintaining the milling chamber in a blank state.

However, this machine is not equipped with a weighing scale to measure the amount of brown rice supplied, and the driver inserts coins based on a rough estimate of the amount of brown rice to be fed and the required driving time, but the guideline and prediction are not accurate. Due to inaccuracy, and even if the measurement is accurate, the flow rate may vary depending on the variety and properties of brown rice.
There were problems such as the operation automatically stopping before the amount of input brown rice had not been completely discharged, or the operation being stopped for too long, resulting in unnecessary unnecessary input of extra coins.

[Purpose of the invention]

In order to solve the above-mentioned problems, the present invention measures the weight of brown rice fed into a rice milling machine using a weighing scale, displays the usage fee for milling on a fee display, and collects coins and coins inserted from the fee slot. The drive motor of the rice milling machine is activated by a signal that matches the usage fee, and after rice polishing is completed, the drive motor detects that there are no more rice grains and automatically stops. The purpose of the present invention is to provide an apparatus that can perform economical rice milling operations depending on the situation.

[Means for solving problems]

In order to achieve the above object, the present invention has the following configuration.

A rotary main shaft with a milling trochanter and a grain-feeding spiral trochanter attached is installed inside the porous wall sugar removal refining cylinder, and the space formed by the porous wall sugar removal refining cylinder and the whitening trochanter is the main part. A coin-operated rice milling machine having a discharge port on one side of the milling chamber and a supply port connected to a supply hopper on the other side, as well as a coin counter and operation control device connected to a charge input port provided at an appropriate location. The automatic control device includes a weighing scale for measuring the weight of brown rice supplied to the supply hopper, and a charge display for displaying a charge for the weight of brown rice in the operation control device;
A rice grain detection device for detecting the presence or absence of rice grains is provided at the discharge port, and a drive motor that drives the rotating main shaft is connected to the weighing scale, charge display, coin counter, and rice grain detection device via an operation control device. Contact.

[Effect]

The raw brown rice is put into the supply hopper of the rice milling machine, the weight of the brown rice is measured using a scale, and the usage fee is displayed on the rate display based on the weight of the brown rice. The coin is counted by a coin counter, and when the relationship between the weight and the coin matches, the drive motor is driven and the milling of brown rice begins in the milling room. When the rice grain detection device detects that there are no rice grains, the supply of brown rice is stopped after a predetermined period of time has elapsed, and the drive motor is stopped to complete the milling process.

〔Example〕

The present invention will be explained with reference to embodiment figures. Fig. 1 shows a rice milling machine, in which a porous-walled sugar removal polishing cylinder 2 is horizontally suspended inside a box-shaped machine frame 1, and a rotating main shaft 5 provided inside the polishing cylinder 2 rotates a polishing trochanter 3 and a grain feeding spiral. The child 4 is attached to the shaft, and a space between the porous wall sugar removal refining tube 2, the refining trochanter 3, and the grain feeding spiral trochanter 4 is formed in the refining chamber 6. A discharge port 8 with a pressure lid 7 is provided on one side of the whitening chamber 6, and a supply port 10 communicating with a supply hopper 9 is provided on the other side.
An outer peripheral wall 1 surrounding the outer periphery of the polishing cylinder 2 with a gap therebetween.
A sugar removal chamber 12 is formed between the sugar removal chamber 12 and the sugar removal chamber 12, and an exhaust fan 13 is connected to the sugar removal chamber 12 so as to discharge sugar powder generated by the whitening action to the outside of the machine. Further, a drive motor 14 is connected to the rotating main shaft 5. The supply hopper 9 is provided with a gap between it and the machine frame 1 so as to be able to move up and down, a weight scale 15 such as a load cell is provided at the bottom of the supply hopper 9, and the supply hopper 9 is mounted on a horizontal fixed beam 16. An on-off valve 17 that can be opened and closed is provided at the bottom of the supply hopper 9, and a solenoid 18 of an opening/closing device for opening and closing the on-off valve 17 is installed at the bottom of the supply hopper 9. 19 is a rice grain detection device consisting of a light source and a light receiving element for detecting the presence or absence of rice grains flowing out from the discharge port 8; 20 is a control box attached to the front part of the machine frame 1; A charge display 22 is provided in the section, and a control device 23 is provided inside thereof. 24 is a receiving box for polished rice. The weight scale 15 includes a load cell, a potentiometer, a rotary transducer, and the like. Further, the supply hopper 9 may be detached from the machine frame 1 to be a separate device, and the supply hopper 9 may be connected to the milling room 6 via an elevator.

Next, the control device 23 will be explained with reference to FIG.

The weight scale 15 is connected to an amplifier 25 of a control device 23, and the output side of the amplifier 25 is connected to an arithmetic device 27 via an A/D converter 26.
A branch part is provided on the output side of the metal granule indicator 28, and one side of the branch part is connected to the grain metal indicator 28. Further, the other side branched from the output side of the arithmetic device 27 is connected to the comparison circuit 30 to which the output side of the coin counter 31 connected to the charge slot 21 is connected. The output side of the comparator circuit 30 is branched and connected to a clock device 32, a motor drive circuit 33, a solenoid 18, and a timer 34, respectively. The output side of the rice grain detection device 19 connected to the output side of the timer 34 is connected to the solenoid 18 and a motor drive circuit 33, and the output side of the motor drive circuit 33 is connected to the drive motor 14 of the rice milling machine.
It is connected to.

The operation of the above configuration will be explained below. 1 and 2, when raw brown rice to be milled is put into the supply hopper 9 of the rice milling machine, the weight of the brown rice is measured by a scale 15, and the measurement signal is amplified by an amplifier 25.
The signal is converted into a digital signal by the connected A/D converter 26 and input to the arithmetic unit 27.
The signal calculated by the calculation device 27 displays the usage fee on the fee display 28 based on the weight of brown rice. Next, when a coin is inserted into the charge slot 21 provided in the control box 20, the coin is counted by the coin counter 31, and the signal is inputted to the comparison circuit 30, which then counts the coins. The signal from the device 31 and the signal from the arithmetic unit 27 are compared, and the matching signal is sent to the motor drive circuit 33 and the solenoid 18 and timer 34 of the on-off valve 17, respectively, and the solenoid 18 is activated to open the on-off valve 17. The brown rice is then flowed down to the milling room 6. In the motor drive circuit 33, the power supply side is turned on to rotate the drive motor 14 of the rice milling machine, and the milling action of brown rice is performed in the milling chamber 6. In the timer 34, the rice grain detection device 1 provided at the discharge port 8 is activated after an arbitrary set time (the time when milled rice starts flowing to the discharge port).
9 to detect the flow state of rice grains. When the rice grain detection device 19 detects the end of discharging the rice grains, the solenoid 18 is activated to close the on-off valve 17 of the supply hopper 9 after a predetermined time (time for the remaining rice grains in the milling chamber 6 to be completely discharged). At the same time, the power supply side of the motor drive circuit 33 is turned off to stop the drive motor 14 of the rice milling machine, thereby completing the milling of brown rice.

Furthermore, assuming that the rice grain detection device 19 malfunctions due to an abnormality (due to dust, etc.), the following configuration may be employed. In the control device 23,
The output side of the clock device 32 and the output side of the arithmetic unit 27 are connected to a down counter 29, and the output side of the down counter 29 is connected to the solenoid 18 and the motor drive circuit 33 (see FIG. 2).

The measurement signal of the weighing scale 15 is input to the calculation device 27 via the A/D converter 26, and the calculation values calculated by the calculation device 27 are sent to the down counter 29 and the comparator 30, respectively. The milling time is set based on the weight and price. Then, in the clock device 32, a pulse signal generated by the coincidence signal between the coin counter 31 and the arithmetic device 27 is sent to the down counter 29 to start counting the set grinding time. The coincidence signal activates the solenoid 18, opens the on-off valve 17, and the brown rice is sent to the milling room 6 to be milled, as described in detail in the previous embodiment. If the drive motor does not stop even after milling is completed due to a malfunction of the rice grain detection device 19, the solenoid 18 is activated by the zero signal of the down counter 29 after the predetermined milling time, which has been set well in advance, has elapsed. , supply hopper 9
When the on-off valve 17 is closed, the power supply side of the motor drive circuit 33 is turned off, and the drive motor 14 of the rice milling machine is stopped.

〔Effect of the invention〕

As described above, according to the present invention, raw brown rice is put into the feed hopper of the rice milling machine, and coins are inserted for the amount displayed on the price display, and the weight of the brown rice is measured by the control device and then milled. is started, and when the rice grain detection device detects that there are no rice grains, the operation is automatically stopped, thus saving labor.

Particularly, the present invention is characterized by measuring the weight of the brown rice supplied to the supply hopper, starting milling based on the brown rice weight value and coin input value, and stopping the operation upon detection by the rice grain detector. As a result, the rice milling machine may automatically stop while leaving unpolished rice, which was a problem with conventional equipment, or the rice milling machine may unnecessarily insert a large amount of coins, or may unnecessarily insert a large amount of coins and restart the rice milling machine. There is no needless idle operation, the pumping time is shortened to the necessary minimum, contributing to power saving, and the rotating main shaft etc. are not wasted unnecessarily, and the coin charge can be minimized, making it economical.

[Brief explanation of drawings]

The drawings are illustrations of embodiments of the present invention. FIG. 1 is a side sectional view of the device, and FIG. 2 is a block diagram of the control electric circuit. DESCRIPTION OF SYMBOLS 1... Box-shaped machine frame, 2... Porous-walled sugar removal refining tube, 3... Refining trochanter, 4... Grain feeding spiral trochanter, 5... Rotating main shaft, 6...
Refining chamber, 7... Pressure lid, 8... Discharge port, 9... Supply hopper, 10... Supply port, 11... Outer peripheral wall, 12... Sugar removal chamber, 13... Air exhaust machine, 14... Drive motor of rice milling machine,
15... Weight scale, 16... Fixed beam, 17... Open/close valve, 1
8...Solenoid, 19...Rice grain detection device, 20...
Control box, 21... Toll slot, 22... Toll display, 23... Control device, 24... Receiving box, 25... Amplifier, 26... A/D converter, 27... Arithmetic device, 2
8...Price display, 29...Down counter, 30
...Comparison circuit, 31...Coin counter, 32...Clock device, 33...Motor drive device, 34...Timer.

Claims (1)

[Claims] 1 Inside the porous-walled sugar removal refining cylinder, a rotating main shaft with a refining trochanter and a grain-feeding spiral trochanter attached is installed, and the space formed by the porous-walled sugar removal refining cylinder and the refining trochanter is the main part. A coin-operated rice milling system is equipped with a discharge port on one side of the milling room, a supply port connected to a supply hopper on the other side, and a coin counter and operation control device connected to a charge input port provided at an appropriate location. The automatic control device for the machine includes a weighing scale for measuring the weight of brown rice fed to the feed hopper, a charge display for displaying a charge for the weight of brown rice in the operation control device, and a meter for measuring the weight of brown rice fed to the feed hopper, and a charge display for displaying a charge for the weight of brown rice in the discharge port. A rice grain detection device is provided to detect the presence or absence of a rice grain detector, and the weighing scale, charge display, coin counter, and rice grain detection device are connected to a drive motor that drives the rotating main shaft via an operation control device. Automatic control device for coin-operated rice milling machine.