JPH02149351A - Rice mill start control device - 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 [Field of Industrial Application] The present invention relates to a rice milling machine start control device such as an unmanned rice milling machine.

[Prior art and the problem to be solved by the invention] When a rice milling machine is started and stopped frequently, residual grains in the milling chamber will affect the milling roll resistance, which will increase the resistance of the milling rolls the next time it is started, resulting in so-called overload current. easy to fall into the situation. Another cause of overload is that hard foreign objects such as stones are mixed in and get stuck between the whitening roll and the bran removal screen. Conventionally, when this overload condition is detected, the power supply to the motor must be cut off to protect the whitening roll, the bran removal screen, the motor, etc., the cause of the overload must be removed, and the motor must be restarted.

By the way, although the cause of overload is often due to the above-mentioned residual grains, in the conventional form mentioned above, the motor stops, which unnecessarily reduces work efficiency and causes problems like the unmanned rice milling equipment that has become popular in recent years. However, it is extremely inconvenient if there are no workers on site.

[Means to solve the problem]

This invention attempts to solve the above-mentioned drawbacks, and provides a rice milling machine that mills brown rice supplied while rotating a milling roll 32 in a milling chamber 31 by a rice milling machine motor 35.
Overload stop F means that cuts off current to the motor 35 when the current detector 65 that detects the load current of the rice polishing machine motor 35 detects a predetermined high load current state continuously for a predetermined period of time when the motor 35 is started. and restarting means for restarting the motor 35 after a predetermined period of time has elapsed since the stop, and a restart means for restarting the motor 35 after a predetermined period of time has elapsed since the stop;
The rice milling machine starting control device is configured to include starting limiting means for cutting off power supply to the motor 35.

[Operation and effect of the invention]

When the rice milling machine motor is started, a milling roll rotates in the milling chamber to whiten the supplied brown rice.When the rice milling machine motor is started, the remaining grains in the milling chamber are compressed by the rotation of the milling roll. This may lead to a lock state and a high load operation state. When such a state continues for a predetermined period of time, the overload stop means is activated to stop the rice milling machine motor, that is, cut off the power supply to the motor. The milling roll is able to release the grain pressure state by its reaction, and after a predetermined period of time has elapsed, the rice milling machine motor is energized again and a restart is attempted.

As described above, since the grain pressure state is often released, it is easy to obtain normal continuous operation by restarting the grain.

If this restart is attempted several times and the load still remains high, this is not due to mere grain compression, but is predicted to be caused by hard foreign objects such as stones, etc. After that, by cutting off the power to the rice milling machine motor, damage to the equipment can be prevented.

〔Example〕

An embodiment of this invention will be described based on the drawings.

Reference numeral 1 denotes a building in which an unmanned rice milling facility is installed, and the interior thereof is divided into an operation room 3 and a machine room 4 by a partition wall 2.

Among these, the operation room 3 side has a brown rice input section 5, an operation panel 6, a polished rice take-out section 7, etc., and the machine room 3 side has a charging hopper 8, a stone removal elevator 9, a stone removal machine 10, a rice polishing elevator 11, Rice polishing machine 12
, a bran processing section 13, etc.

The brown rice input section 5 has a brown rice stand 15 on the operation room 3 side before and after the opening 14 of the partition wall 2.
The input hoppers 8 are configured to be visible on the sides, and a supply @ 17 containing a supply spiral 16 is provided at the bottom of the hopper 8, and the shaft of the spiral 16 is provided so as to be rotationally interlocked by a drive motor 18 at one end. 19 is a sieve screen.

The transfer end side of the supply gutter 17 is exposed to the hopper portion of the stone removing elevator 9, and the stone removing machine 10 is positioned below the hopper on the upper side of the stone removing elevator 9. This stone removal #10 is a slope sorting net 20. Consists of a fan 21° swinging mechanism 22, etc.
The rotation of the drive motor 23 causes the tilting direction of the sorting net 20 to swing and create wind to remove foreign objects (stones, metal pieces, etc.) mixed in the brown rice.
Shake the rice to the upper side of the slope and let the brown rice flow down to exit 2.
It is configured so that it can be discharged from 4. The foreign matter discharge shutter 25 provided on the upper side of the sorting net 20 is normally kept in a "closed" state by a spring 26, and is of a forward/reverse type that rotates in the normal direction upon receiving a work completion signal (for example, the stop signal of the supply spiral 16). Opening/closing motor 2
7 becomes "open".

28.29 is a limit switch for setting the limit operation, and
It is possible to set a rotation limit for the opening/closing motor 27, which rotates in reverse after maintaining the "open" state for a short period of time (for example, 5 seconds).

The hopper of the rice milling machine 11 is visible below the brown rice outlet 24 of item 1, and the brown rice tank 30 of the rice milling machine 12 is visible below a portion of the tank.

This rice milling machine 12 has a known configuration in which a milling roll 32 is installed in a milling chamber 31, and the separated bran from a bran removal screen 33 is conveyed to the bran processing section 13 by a bran conveying fan 34. Reference numeral 35 is a rice milling machine motor that rotates and interlocks the polishing roll 32, bran conveying fan 34, and the like. The outlet side of the white rice polishing chamber 31 communicates with a white rice tank 36 serving as a white rice take-out section 7. 3
7 is a fan that blows air into the whitening room 31. The degree of whitening is adjusted by changing the elastic pressure of the whitening adjustment spring 4o applied to the pressure plate 39 on the exit side by rotating the whitening adjustment motor 38 in the forward and reverse directions. That is, the whitening adjustment spring 40 loosely fitted onto the shaft 41 connected to the motor 38 is connected to the upper receiver 42 and the shaft 41.
The shaft 4 is received by a nut member 43 screwed into the lower part.
The effective length is set to be long or short in one rotation, and the pressure of the pressure expulsion 39 connected by the wire 44 can be changed. In addition, part receiver 4
2 is connected to a bran removing screen 33 which is provided so that it can freely move, and in an overloaded state such as during startup, the wire 44 is rotated together with the whitening roll 32 and the wire 44 is opened at the outlet side to reduce the load. There is.

The bran processing unit 13 has a cyclone 45 and a cyclone 4.
5. The bran that fell into the bottom? Horizontal bran transfer spiral 4
6@47, and rice bran bags 48, 48 for receiving rice bran falling from a discharge section opened at the middle and end of the spiral @47.

The operation panel 6 on the operation room 3 side has a brown rice input ready lamp 49, a coin number indicator 50, a coin mech 51,
Sticky rice button 52, white change selection (for turning, select white, standard,
(selectable in 3/8 steps) buttons 53, 54, 55,
A price list 56 (for example, 100 yen for rlokg) is provided, and the coin mech 51 is equipped with an input coin identification section, a coin sensor 57 that operates for each input coin, and the like.

The operation panel 6 is equipped with a microcomputer for controlling the drive motors of various parts.

Arithmetic control unit (CPU) 58 of the microcomputer
includes detection information from the coin sensor 57, white discoloration selection information,
A limit switch 60 connected to the brown rice detection sensor signal and the whitening adjustment motor 38 and in contact with a cam 59 having cam grooves at four equidistant positions on the circumference and turned on while fitting into the cam grooves in conjunction with the rotation of the shaft 41. Signals, clock signals, etc. are input. -Force output information includes supply spiral drive motor 18 control signal, stone removal machine 10 drive motor 23, elevator 9, 11% pM! ! +
There are control signals for the drive system of the motor 61, the rice polishing machine 12 drive motor 35, the bran transfer spiral motor 62, etc., the stone removal machine shirt opener opening/closing motor 27 control signal, the whitening adjustment motor 38 control signal, etc.

Figure 8 shows a control circuit diagram, with terminals R and S of the royal phase AC power supply.
, T, an electromagnetic switch 64 and a current transformer 65 as a current detector capable of detecting the current value in the circuit 63 are disposed in the middle of the circuit 63 of the rice milling machine motor 35 connected to the rice milling machine motor 35. In the middle of an electromagnetic coil excitation circuit 66 that excites the electromagnetic coil of the electromagnetic switch 64, there is a contact 68 that is turned ON when a rice milling machine relay 67 (described later) is excited. Furthermore, -1-
The circuit 63 is branched to connect the supply helical drive motor 18 and the stone remover drive motor 23. Elevator drive motor 61° Electromagnetic switches 70° 71, 72, 7 of bran transfer spiral drive motor 62
3 are installed.

74 is a current setting path 101 connected to the current transformer 65, and when the detected current value exceeds the current value α arbitrarily set in advance by this current setting circuit 74, the value is sent to the overload current detection circuit 75. Output. The overload current detection circuit 75 has an overload value set in advance and is configured to be able to determine whether or not the output current value exceeds the overload value.When the overload value is exceeded, the signal is output to the time setting circuit 76. be done. When the detected current exceeds the overload value and continues for a predetermined time 11 (for example, 2 seconds) set by the time setting circuit 76, the signal is output to the OR circuit 77. On the other hand, the output signal from the current setting circuit 74 is branched and taken into the open phase detection circuit 78, and it is determined whether there is a partial open phase. When an open phase state is detected, a determination signal thereof is output to the OR circuit 77. Reference numeral 79 denotes an anti-phase detection circuit connected to the royal phase alternating current power supply circuit, and similarly outputs an anti-phase determination signal to the OR circuit 77. When any input signal enters the OR circuit 77, an output signal is generated and input to the amplifier circuit 80, which excites the internal relay 81.

A contact 82 of the internal relay 81 is configured to excite a control relay 83 connected to an appropriate phase power supply circuit, and a contact 84 of the control relay 83 is configured to excite a control relay 83 connected to an appropriate phase power supply circuit. The contact 86 in the circuit of the overload signal relay 85 is interposed to interrupt this circuit 66.
is turned on. 87 is a rectifying and smoothing circuit, which is connected to each of the above-mentioned circuits, that is, the current setting circuit 74. Overload current detection circuit 75
The structure is such that a constant voltage can be supplied to the terminals, etc. Reference numeral 88 denotes a test switch that outputs pseudo signals to the overload current detection circuit 75 and the time setting circuit 76, respectively.

The CPO 58 mainly has the following functions. That is, (2) the input amount and number of coins are calculated in response to a signal from the coin sensor 57; ■According to the number of coins (100 yen coins) inserted, the built-in timer means is operated for a predetermined time, rice milling machine relay 67, supply spiral drive relay 899 stone removal machine drive relay 9
0. Elevator drive relay 91. Rice bran transfer spiral drive relay 92
outputs an excitation signal. ■Before starting work, a white melon selection button signal is input, and the white change adjustment motor 38 rotates in the normal or reverse direction so that the white change corresponds to the selected position.
The rotation position is set in advance.

That is, the newly set white discoloration state is compared with the white discoloration state stored before the button setting, and while outputting the motor 38 rotation signal, the limit switch 60 is set to the concave portion of the cam 59 to determine the rotation degree. The number of times of fitting is determined, and when a predetermined count is reached, a stop signal is output. ■Overload signal relay 8
In response to the overload signal from the contact 93 which is turned ON based on the excitation of the rice polishing machine 5, a demagnetizing signal is output to the rice mill relay 67 (overload stop means). (2) At the same time, the built-in timer means operates for a predetermined period of time 11 (for example, 0.5 seconds), and after the elapse of that time, a restart signal is output to the rice polishing machine relay 67 (restart means). (2) The number of restarts is counted, and when a predetermined number (for example, five times) is reached, an abnormal stop signal is output to stop the excitation output operation to the rice mill relay 67 (startup control means and alarm means).

■After the work end signal, that is, the supply spiral 16 drive motor 18 operating time set according to the number of coins inserted has elapsed, the discharge shutter 25 motor 27 of the stone removal machine 10 is rotated in the forward direction, and after a predetermined time has elapsed, it is reversed. 6, etc., which outputs a forward/reverse signal to return.

The action of the upper side will be explained.

Coins sufficient to secure an operating time corresponding to the amount of raw material brown rice are input into the input 1 of the coin mech 51 in advance, and the brown rice is supplied to the input hopper 8. Each part of the apparatus starts operating at the same time as a coin is inserted, and the brown rice from the input hopper 8 is horizontally transferred by the supply spiral 16 and input into the stone removal elevator 9. The brown rice discharged from the upper part of the elevator 9 is removed from the stone remover 10.
The foreign matter that enters the container is subjected to rocking or wind screening to remove any foreign matter that may have entered the container. The polished brown rice from below the sorting net 20 is transferred to the rice polishing elevator 11.
The brown rice is then lifted up and supplied into the brown rice tank 30.

The brown rice flowing down into the whitening chamber 31 of the rice milling machine 12 is polished by the rotation of the whitening rolls 32 to remove the bran layer on the surface between grains or between the bran removal screens 33. At this time, the compression plate 39 of output 1-1 is set to a desired pressure using the polishing selection button, and the desired polishing degree is achieved. The polished rice from the whitening chamber 31 passes through the polished rice take-out section 7 and is appropriately collected in the operation chamber 3.

By the way, when the power is turned on, the rice milling machine motor 35
The load current of the circuit 63 is detected by the current transformer 65,
An overload current detection circuit 75 detects whether the current exceeds a predetermined value.
When the overload current state continues for a predetermined time t1 set by the time setting circuit 76, for example, 2 seconds, an excitation signal is output to the internal relay 81 via the OR circuit 77 and the amplifier circuit 80. When this internal relay 81 is energized, its contact 82 is ONL, and the control relay 83 is energized.

The contact 84 is turned OFF instantaneously by the action of this control relay 83.
F, the electromagnetic coil excitation circuit 66 is cut off, and the rice milling machine motor 35 is stopped. At the same time, control relay 8
3, the contact 86 is turned on and the overload signal relay 85 is energized. The operation of the overload signal relay 85 is received by the CPU 58 via the contact 93, which causes the internal timer means to operate, and when the predetermined time t, (o, 5 seconds) has elapsed, the rice milling machine relay 67 is energized again. That is, the electromagnetic coil excitation circuit 66 of the rice milling machine motor 35 becomes energized in order to restart it.

For this reason, even if the rotation of the whitening roll 32 presses the remaining grains inside and becomes locked, resulting in an overload condition, the whitening roll 32 will stop because the rice milling machine motor 35 will stop. The rotational force in a certain direction is released, and the reaction creates a gap between the slightly compressed grains. After this, the rice milling machine motor 35 is activated again, so that the polishing roll 32 rotates in a state where the grain resistance is alleviated, thereby smoothing the activation. In addition, if the bran removal screen 33 is configured to be able to reverse rotation in an internal overload state as in this embodiment, the grain opening space can be expanded by the reaction when released from the above-mentioned locked state, which is more effective. It is.

If the rice milling machine motor 35 cannot be started to rotate normally even after starting the rice milling machine motor 35 twice in 1-1 steps, it is restarted three times and then four times (in this embodiment, it is assumed that normal operation has been reached at the third start), depending on the circumstances. Restarting will not be performed after 5 times. in this case,
If a hard foreign object is predicted to be caught, an abnormality will be displayed as appropriate.
Encourage inspection work by users, etc. Furthermore, if a steady rotational state cannot be obtained even after a predetermined period of time, for example 15 seconds, has elapsed since the first A11 operation before reaching the total of 5 times, an abnormality is displayed.

When the time set by the input amount has elapsed, the drive motor 18 of the supply spiral 16 first stops, and after a predetermined time delay, the drive motor of the rice mill, etc. stops, so the elevators 9, 11, etc. The amount of brown rice remaining in the whitening room 31 can be reduced.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is an overall plan view, Fig. 2 is a schematic flow diagram of the device, Fig. 3 is a sectional view of the side of the stone removal machine, and Fig. 4 is a plan view of a part thereof. Figure 5 is a side sectional view of the rice milling machine, Figure 6 is an explanatory diagram showing the polishing adjustment mechanism, Figure 7 is a front view of the operation panel, Figure 8 is a control circuit diagram, and Figure 9 is an explanatory diagram of the operation. It is. In the figure, 3 is an operation room, 4 is a machine room, 12 is a rice milling machine, 31 is a milling room, 32 is a milling roll, 33 is a bran removal screen, 3
5 is a rice mill motor, 51 is a coin mech, 58 is a calculation control unit (CPU), 64 is an electromagnetic switch, 65 is a current transformer as a current detector, 66 is an electromagnetic coil excitation circuit, and 67 is a rice mill relay. 74 is a current setting circuit, 75 is an overload current detector 11'', 1i=1 path, 76 is a time setting circuit, 81 is an internal relay, 83 is a control relay, and 85 is an overload No. III relay.

Claims (1)

[Claims] (1) In a rice milling machine that mills brown rice that is supplied by a rice milling machine motor 35 while rotating a milling roll 32 in a milling chamber 31, a current detector 65 that detects the load current of the rice milling machine motor 35 is connected to the rice milling machine motor 35. 35; an overload stop means that cuts off current to the motor 35 when a predetermined high-load current state is continuously detected for a predetermined period of time when the motor 35 is started; and a restart that restarts the motor 35 after a predetermined time has elapsed since the stop. and a start-up limiting means that counts the number of restarts and cuts off power to the motor 35 when the number of restarts reaches a predetermined number.