JPH0763638B2 - Rice mill starting control device - Google Patents

Description

The present invention relates to a rice milling machine activation control device such as an unmanned rice milling device.

[Problems to be Solved by Prior Art and Invention]

If the rice milling machine is repeatedly operated and stopped frequently, the residual grains in the milling chamber affect the resistance of the milling roll at the next start, and the so-called overload current state is likely to occur. In addition to this, hard foreign substances such as stones are mixed in the cause of overload,
It may bite between the whitening roll and the bran screen. Conventionally, when this overload state is detected, it is necessary to cut off the power supply to the motor, remove the cause of the overload, and restart the motor in order to protect the whitening roll, the bran screen, and the motor.

By the way, although the cause of the overload is often due to the above-mentioned residual grains, the motor is stopped one by one in the above-mentioned conventional form, so that the work efficiency is undesirably reduced, and it is like the unmanned rice milling device which is becoming popular in recent years. However, it is extremely inconvenient if workers are not stationed.

[Means for Solving the Problems]

This invention attempts to solve the above drawbacks, and in a rice polishing machine for whitening brown rice supplied while rotating a whitening roll 32 in a whitening chamber 31 by a rice polishing machine motor 35, the rotation of the whitening roll 32 shaft 36 Rotation detector 47 to detect the presence or absence
And when the motor 35 of the rice milling machine is started, the rotation detector
Based on the non-rotation detection of 47, the overload stopping means for interrupting the power supply to the motor 35, the restarting means for restarting the motor 35 after a lapse of a predetermined time from the stop, and the number of restarts are counted. Then, when the predetermined number of times is reached, the motor 35
The rice mill start-up control device is provided with a start-up limiting means for shutting off power to the rice milling machine.

[Operation and effect of the invention]

When the motor of the rice mill is started, the whitening roll is rotated in the whitening chamber to supply the white rice, but when starting the motor of the rice mill, the grains remaining in the whitening chamber are pressed by the rotation of the whitening roll. Then, it falls into a locked state and the whitening roll may not be able to rotate. For this reason, when the rotation detector detects non-rotation of the whitening roll shaft, the overload stopping means operates to temporarily stop the motor of the rice milling machine, that is, cut off the power supply to the motor. The milling roll can release the compressed state of the grain by its reaction, and after a predetermined short time, the milling machine motor is normally restarted and an attempt is made to restart. Since the grain flow compression state is often released as described above, it is easy to obtain a regular continuous operation by the restart.

Even if this restart is tried several times, if the whitening roll still falls into a non-rotating state, it is predicted that biting of hard foreign matter such as stones is not caused by mere grain compression, and After restarting a number of times, by cutting off the power supply to the motor of the rice milling machine, it becomes possible to prevent the damage of the devices.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

Reference numeral 1 is a building in which an unmanned rice polishing facility is installed, and the inside is partitioned by a partition wall 2 into an operation room 3 and a machine room 4. Among these, the operation room 3 side has a brown rice feeding section 5, an operation panel 6, a white rice unloading section 7, etc., and the machine room 3 side has a loading hopper 8, a stone removing elevator 9,
It has a stone removing machine 10, a rice milling elevator 11, a rice milling machine 12, a bran processing section 13 and the like.

The brown rice feeding section 5 has a construction in which, before and after the opening 14 of the partition wall 2, the brown rice placing table 15 can be seen on the operation room 3 side and the feeding hopper 8 can be seen on the machine room 4 side. A supply gutter 17 that houses a supply spiral 16 is provided in the lower part, and the axis of the spiral 16 is rotatably operated by a drive motor 18 on one end side. 19 is a sieve screen.

The transfer end side of the supply gutter 17 is looked into the hopper portion of the stone removing elevator 9 and the stone removing machine 10 is located below the hopper of the upper portion of the stone removing elevator 9. This stone removing machine 10 is an inclined sorting net
20, a fan 21, a swinging mechanism 22, etc., and the rotation of the drive motor 23 causes the sorting net 20 to swing while the tilting direction swings to cause foreign substances (stones, metal pieces, etc.) mixed in the brown rice to be tilted higher side It is structured so that it can be discharged to the bottom of the brown rice by flowing it down to the outlet 24. A foreign matter discharge shutter provided on the upper side of the sorting net 20
The spring 25 is normally held in the “closed” state by the spring 26, and is opened by the forward / reverse rotation opening / closing motor 27 which normally rotates in response to the work end signal (for example, the supply spiral 16 stop signal). 28 and 29 are limit switches for setting a limit operation, which can set a rotation limit of the opening / closing motor 27 which is interlocked with reverse rotation after maintaining the "open" state for a short time (for example, 5 seconds).

The hopper of the rice-polishing elevator 11 is looked under the brown rice outlet 24, and the brown rice tank 30 of the rice-polishing machine 12 is seen under the upper tank.

This rice milling machine 12 is a known form in which a whitening roll 32 is housed in a whitening chamber 31, and a separation bran from the debranching screen 33 is
It is transported to the bran processing unit 13 by the bran transport fan 34. Reference numeral 35 denotes a rice milling machine motor which interlocks the whitening roll 32, the bran conveying fan 34 and the like with rotation. That is, belts 37, 37, ... Are wound around a roll shaft 36 integrally formed with a whitening roll 32 and a brown rice feed spiral and a rice milling machine motor 35 to be transmitted. The outlet side of the whitening chamber 31 leads to a white rice tank 38 as the white rice unloading section 7. Reference numeral 39 is a blower fan that should be blown to the polishing room 31.
The whiteness is adjusted by changing the elastic pressure of the whiteness adjusting spring 42 applied to the compression plate 41 on the outlet side by the forward / reverse rotation of the whiteness adjusting motor 40. That is, the whiteness adjusting spring 42 loosely fitted to the shaft 43 connected to the motor 40 is received by the upper receiving body 44 and the nut member 45 screwed to the lower part of the shaft 41, and the effective length is obtained by rotating the shaft 43. Is set to be short and long, and the pressure of the compression plate 41 connected by the wire 46 can be changed. Incidentally, the upper receiver 44 is connected to the bran screen 33 provided so as to float, and in an overloaded state such as at the time of starting, the wire 46 is pulled along with the whitening roll 32,
The outlet side is open so that the load can be reduced.

Reference numeral 47 is a rotation detector capable of detecting the presence or absence of rotation of the whitening roll shaft 36. The magnetic substances 48 and 48 are provided at the end of the shaft 36 with a 180 ° phase shift, and are provided on the fixed member to correspond to them. It consists of a reed switch 49.

The bran processing unit 13 is a cyclone 50 and a bran transfer spiral 51 gutter 52 for horizontally transferring the bran that has dropped into the lower part of the cyclone 50.
And the bran bags 53, 53 for receiving the fallen bran from the discharge portion opened to the middle and the terminal side of the spiral gutter 52.

Reference numeral 54 denotes a dust-exhausting fan provided coaxially with the bran conveying fan 34 and the blower fan 39 that are arranged in parallel to the rice-milling machine motor 35 so as to transmit the belt 55. The dust-collecting fan 54 collects floating dust from the cyclone 50 in the machine room 4. It is to be discharged to the outside of the machine through the dust container 54a.

The operation panel on the operation room 3 side has a brown rice insertable lamp 56, a coin number display 57, a coin mech 58, a sticky rice button 59, and a whiteness selection (in the example shown, white, standard, 8 minutes). Of 3
Buttons 60, 61, 62, charge table 63 (for example, "100 yen up to 10 kg"), etc. are provided. Of these, the coin mech 58 operates for each coin-inserted identification unit and each coin inserted. A coin sensor 64 and the like are provided. And this operation panel 6
The inside of is equipped with a microcomputer for controlling the drive of each part drive motor.

In the arithmetic control unit (CPU) 65 of the microcomputer, the detection information from the coin sensor 64, the whiteness selection information, the brown rice detection sensor signal, and the whiteness adjusting motor 40 are connected to the cam groove at the circumferential 4 equal positions. Limit switch 67 which is in contact with the cam 66 that it has and which is interlocked with the rotation of the shaft 43 and is turned on while fitting in the cam groove, a clock signal, and the reed switch 49 of the rotation detector 47.
A signal or the like is input. On the other hand, as output information, the supply spiral drive motor 18 control signal, the stone removing machine 10 drive motor 23, the elevator 9,
11 drive motor 68 / rice milling machine 12 drive motor 35 / bran transfer spiral motor 69 etc. This machine drive system control signal, stone removing machine shutter opening / closing motor 27 control signal, whiteness adjusting motor 40 control signal, etc.

The figure shows the control circuit diagram, which shows the terminals R, S, and T of the three-phase AC power supply.
An electromagnetic switch 71 is provided in the middle of the circuit 70 of the rice milling machine motor 35 connected to. Further, the circuit 70 is branched to each electromagnetic switch 72, 73, 74 of the supply spiral drive motor 18, the stone removing machine drive motor 23, the elevator drive motor 68, and the bran transfer spiral drive motor 69.
75 are arranged.

The CPU 65 mainly has the following functions. That is, the amount of money to be inserted or the number of inserted coins is calculated by receiving a signal from the coin sensor 64. The built-in timer means is operated according to the number of coins (100 yen coins) inserted, and the relay 76 for the rice milling machine, the supply spiral drive relay 77, the stone removing machine drive relay 78, the elevator drive relay 79, the bran transfer spiral drive relay is operated for a predetermined time. Outputs 80 excitation signal. Before the work is started, the whiteness selection button signal is input, but the whiteness adjustment motor 40 is normally or reversely rotated to set the whiteness according to the selected position, and is set to a preset rotational position. That is, the whiteness state stored before the button setting is compared with the newly set whiteness degree, and the
While outputting the 40 rotation signal, the rotation degree is obtained by the number of times the limit switch 67 is fitted into the concave portion of the cam 66, and when the predetermined count is reached, the stop signal is output. Rotation detector 47
In response to the non-rotation (non-rotation) signal of the reed switch 49, a demagnetization signal is output to the rice milling machine relay 76 (overload stopping means). At the same time, the built-in timer means sets a predetermined time t ₂
It operates (for example, 0.5 seconds), and outputs a restart signal to the rice polishing machine relay 76 after the time has elapsed (restarting means). The number of restarts is counted, and when it reaches a predetermined number (for example, 5 times), an abnormal stop signal is output to stop the excitation output operation to the rice milling machine relay 76 (start control means and alarm means). After the work completion signal, that is, the supply spiral 16 drive motor 18 operation time set according to the number of inserted coins, the stone removing machine 10
The discharge shutter 25 motor 27 is rotated in the normal direction, and a normal / reverse rotation signal is output to return to the reverse rotation after a predetermined time has elapsed. Etc.

In the control circuit, means 81 for detecting the presence or absence of a user
(For example, an infrared sensor) is installed in a proper place, and a pest control light 82 is always available.
The side is energized, and it is configured to switch to the normal illumination lamp 83 by user detection.

The operation of the above example will be described.

Coins sufficient to secure an operating time corresponding to the amount of the raw brown rice are put into the insertion slot of the coin mech 58 in advance, and the brown rice is supplied to the input hopper 8. The operation of each part of the apparatus starts at the same time when the coins are inserted, and the brown rice from the insertion hopper 8 is horizontally transferred by the supply spiral 16 and is inserted into the stone removing elevator 9. The brown rice discharged from the upper part of the elevator 9 enters the stone removing machine 10 and is shaken or subjected to a wind separation treatment to remove foreign matters mixed therein. The refined brown rice from the lower part of the sorting net 20 is supplied to the rice polishing elevator 11 to be lifted and supplied into the brown rice tank 30. The brown rice flowing into the whitening chamber 31 of the rice milling machine 12 is whitened by the rotation of the whitening roll 32 between the grains or between the bran screens 33 to remove the bran surface. At this time, the compression plate 41 at the outlet is set to a desired pressure with the whitening selection button, and the desired whiteness is obtained. The milled rice from the milling room 31 is properly collected in the operation room 3 via the milled rice removing section 7.

By the way, when one of the whiteness selection buttons 60 to 62 is turned on, the load current detection circuit 75 determines that the overload current state continues for a predetermined time t ₁ set by the time setting circuit 76, for example, 2 seconds. Internal relay 81 via circuit 77 and amplifier circuit 80
An excitation signal is output to. When this internal relay 81 is excited, its contact 82 is turned on and the control relay 83 is excited. The contact 84 is instantly turned off by the function of this control relay 83,
The electromagnetic coil exciting circuit 66 is turned off, and the rotation detector 47
Detects the rotation of the whitening roll shaft 36. That is, if the magnetic signal to the reed switch 49 continues to be ON or OFF for a certain period of time, it is determined that no rotation occurs, the rice mill relay 76 is demagnetized, and the rice mill motor 35 is stopped. At the same time, the CPU 65 causes the internal timer means to operate, and again excites the rice-polishing machine relay 76 when a predetermined time t ₂ (0.5 seconds) has elapsed.

Therefore, the rotation of the whitening roll 32 presses the grains of the internal residual grains into a locked state, and even if it is supposed to cause an overloaded state, the whitening roll 32 of the whitening roll 32 is temporarily stopped because the rice mill motor 35 stops. The rotational force in a certain direction is released and the reaction force causes a gap between the grains in a slightly compressed state.
After this, the rice-polishing machine motor 35 is placed in the activated state again, so that the milled white roll 32 rotates in a state in which the grain resistance is alleviated, thus facilitating the activation. Incidentally, if the bran screen 33 is configured to be capable of reversing rotation in the internal overload state as in this embodiment, it is possible to more effectively secure the expansion of the grain opening space that reacts when releasing from the above-mentioned locked state. is there.

If the second rotation of the rice-polishing machine motor 35 cannot be started, the restart is repeated 3 times and 4 times, and the restart will not be performed after 5 times. In this case, it is predicted that a hard foreign matter or the like will be caught, and an abnormality is appropriately displayed to prompt the user or the like to perform an inspection work. In addition, if a steady rotation state cannot be obtained within a predetermined time, for example, 15 seconds from the initial start-up before the number of times reaches five, the error display is given. still,
In this case, as shown in FIGS. 10 and 11, the conductive wire 85 is stretched around the bran screen 33 with the insulating material 84 interposed therebetween, and a constant voltage is constantly applied to the bran screen 33 so that the screen 33 is not electrically disconnected. By utilizing the nature of the state, the damage of the screen 33 can be reliably detected through an alarm buzzer or the like.

The driving motors 18 of the supply spiral 16 stop after the time set by the input amount of money has passed, and the drive motors of the rice milling machine such as the rice milling machine stop after a predetermined time, so that the elevators 9, 11 and the whitening chamber 31 The amount of brown rice inside can be reduced.

[Brief description of drawings]

1 shows an embodiment of the present invention. FIG. 1 is an overall plan view, FIG. 2 is a schematic flow chart of the apparatus, FIG. 3 is a sectional view of a stone removing machine, and FIG. 4 is a partial plan view thereof. 5 and 5 are side sectional views of the rice milling machine, FIG. 6 is an explanatory view showing the whitening adjusting mechanism, FIG. 7 is a partially enlarged view of FIG. 5, FIG. 8 is a front view of the operation panel, and FIG.
FIG. 10 is a control circuit diagram, FIG. 10 is a diagram of another embodiment of the bran-removing screen, and FIG. 11 is an enlarged sectional view thereof. In the figure, 3 is an operation room, 4 is a machine room, 12 is a rice polishing machine, 31 is a whitening room, 32 is a whitening roll, 33 is a bran screen, 35 is a rice polishing machine motor, 47 is a rotation detector, and 58 is a coin mech. , 65 is an arithmetic and control unit (CPU), 71 is an electromagnetic switch, 66 is an electromagnetic coil exciting circuit, and 76 is a rice milling machine relay.

Claims (1)

[Claims] 1. In a rice polishing machine for whitening brown rice supplied while rotating a whitening roll 32 in a whitening chamber 31 by a rice polishing machine motor 35, a rotation detector for detecting the presence or absence of rotation of the whitening roll 32 shaft 36. 47, the above-mentioned rice mill motor 35, at the time of starting, based on the non-rotation detection of the rotation detector 47, overload stop means for cutting off the power supply to this motor 35, and after a lapse of a predetermined time from this stop, the motor A rice-polishing-machine start-up control device comprising restarting means for restarting 35 and start-up limiting means for counting the number of restarts and cutting off the power supply to the motor 35 when a predetermined number of times is reached.