JPH0237218B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automatic control device for a rice hulling sorting device,
More specifically, the present invention relates to an improvement of a roll-to-roll adjustment device when the amount of supply to the hulling section is reduced in a de-sorting device that is integrally configured with a hulling section and a swinging type paddy/brown rice sorting section.

[Prior art]

The technique of controlling the distance between a pair of roll-offs by the load value of the electric motor that drives the roll-offs has been known for a long time.
This is a technique disclosed in Japanese Patent Publication No. 66101 and Japanese Patent Publication No. 47-25420. In addition, as an improvement of the automatic control device during derolling, Japanese Patent Application Laid-open No. 55-99347 describes
When the raw material for derolling is not supplied, the load on the main motor decreases and the distance between derolling narrows, resulting in an accident where the unrolled parts come into contact with each other and wear out. A technique is disclosed in which the adjustment of the distance between the rolls is not performed when the adjustment is not made.

[Problem to be solved by the invention]

However, the conventional method was limited to simple load control for derolling, and no consideration was given to fluctuations in flow rate caused by the interlocking of the huller and the sorting machine in the subsequent process. For this reason, if control is performed to reduce the amount of supply to the sorter in the post-process and the amount of supply to derolling is reduced,
The load on the electric motor that drives the derolling is also reduced, and the derolling interval is narrowed by the derolling interval control, which applies strong pressure to the supplied raw material paddy, which causes the brown rice to shift or break into granules. It was hot.

The present invention was made for the purpose of solving the above-mentioned problems, and is designed to stop the adjustment between derolling when the amount of supply to the derolling section fluctuates, especially when the amount of supply decreases below the lower limit set amount. This is what I did.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention provides a rice husk wind-selecting chamber in the lower part of the de-rolling chamber in which a supply hopper is mounted and a pair of de-rolls driven by a main motor. The mixed grains of paddy and brown rice discharged from the chamber are supplied to a swing sorting board by a grain lifting machine and a grain tank installed on the discharge side of the machine so as to be able to move up and down. In the de-sorting device which uses a motion type to sort into three types: brown rice, mixed grains of paddy and brown rice, and paddy, the grain tank moves downward and downward in response to increases and decreases in the mixed grains of paddy and brown rice inside it, respectively. The grain tank and the flow rate control valve are interlocked and connected so that when the grain tank and the flow rate control valve are moved upward, the opening degree of the flow rate control valve provided in the supply section of the supply hopper is adjusted to small and large respectively. An opening detector for detecting the minimum opening position of the flow rate control valve is provided in connection with the flow rate control valve,
a setting device that sets an upper limit value and a lower limit value of the load in the output circuit of the opening degree detector and in the control circuit of the reversible rotary motor that adjusts the distance between the pair of derolling in relation to the load of the main motor; and the output side of
A technical measure was taken to connect the forward and reverse rotation relays of the reversible rotary motor through an AND circuit.

[Effect]

With the above configuration, more than 80% of the raw material paddy supplied to the supply hopper passes through the derolling section which is initialized and controlled by the load of the electric motor, and is de-rolled in the rice husk winding room. The rice husks are removed from the grains, and the mixed grains of paddy and brown rice are transferred to a grain tank via a grain frying machine, and then fed at a constant flow rate to a vibrating sorting board. The mixed grains of paddy/brown rice are gradually sorted into three types: brown rice, mixed grains of paddy/brown rice, and paddy by the shaking motion of a vibrating sorting board. Then, the brown rice is transferred to the next process, the paddy/brown rice mixed grains are returned to the grain tank via the grain lifting machine, and the paddy is transferred to the previous process for unrolling.

Here, when the amount of mixed grains of paddy and brown rice in the grain tank increases, the tank moves downward due to its own weight, and in conjunction with this, the opening degree of the flow rate control valve of the supply hopper decreases, and the amount of supply to the de-rolling is reduced. decrease, and the flow balance is maintained. However, when the amount of mixed grains of paddy and brown rice in the grain tank increases extremely, the opening degree of the flow control valve becomes narrower, and the supply to derolling is almost no longer performed, reducing the load on the main motor. The signal from the opening detector that detects the position causes the reversible rotary motor to stop adjusting the distance between rolls and continue the work without the rolls coming too close.

〔Example〕

The present invention will be explained with reference to embodiment figures. FIG. 1 shows the entire deselection apparatus. On one side of the upper part of the box-shaped machine frame 2 forming the rice husk wind sorting chamber 1, there is provided a de-chamber 5 in which a pair of de-rolls 3 and 4 are stacked against each other, and on the other side, a swing sorting board 6 and a vibrating device 7 are installed. A grain lifting machine 10 with a grain tank 9 suspended thereon is mounted adjacent to the side of the machine frame 2 and connected thereto.

That is, the raw material paddy supplied to the supply hopper 11 above the dechambering 5 flows down through the opening 14 of the flow rate control valve 13 provided at the supply port 12, and flows through the derolling 3,
The rice husks are removed from the rice husks in 4 hours, and the threshed grains are wind sorted in the rice husk wind sorting chamber 1, and the rice husks are discharged outside the machine. On the other hand, the mixed grains of paddy and brown rice are fried from the paddy and brown rice mixed grain receiving trough 15 to the grain tank 9 via the grain lifting machine 10. The mixed grains in the tank 9 are supplied to the supply gutter 1 from its outlet 16.
7, the liquid is evenly supplied to each swinging sorting board 6 provided in multiple stages. Then, by the rocking action of each sorting board 6..., the brown rice is drifted to the higher side and the paddy to the lower side, and the mixed grains of paddy and brown rice are shaken to the middle layer. It flows out to the side perpendicular to the direction, and each sorting board 6...
It is formed so that paddy, paddy/brown rice mixed grains, and brown rice are separated and discharged from the edge of the board.

Next, the flow rate adjustment device of the flow rate adjustment valve 13 will be explained. Horizontal lever rods 19, 19 whose central portions are pivotally connected are provided on both side walls of the discharge port of the grain lifting machine 10, and a grain tank 9 is suspended from one end of each lever rod 19. The other end is pulled downward by a bomb 20, and the grain tank 9 is formed to move up and down as the amount of grain increases or decreases. Furthermore, while connecting the upper end of a connecting member 22 such as a wire to a stopper 21 provided on the side wall of the tank 9,
The other end is connected to a rotating rod 23 of a flow control valve 13 provided at the bottom of the supply hopper 11 (see FIG. 2). That is, an inclined fixed-flow grain plate 24 is provided in the supply port 12, and the flow rate regulating valve 13, which is a flat plate, is pivotally connected to the fixed-flow grain plate 24 so as to be openable and closable. A rotating rod 23 is connected so that the opening 14 of the flow control valve 13 opens and closes as appropriate in response to the vertical movement of the grain tank 9.

Next, a device for adjusting the distance between the rolls 3 and 4 will be explained. Rotating main shaft 25 fixed inside the escape chamber 5
and a moving/rotating sub-shaft 26 are mounted parallel to each other, and the de-rolling shafts 3 and 4 are attached to each shaft 25 and 26, respectively, and the sub-shaft 26 always remains parallel to the main shaft 25 and moves near and far. The shaft is mounted on a bearing 29 provided on an arm rod 28 that rotates about a base shaft 27 as a fulcrum. A helical spring 32 is interposed on the rod 31 engaged with the force point 30 at the tip of the arm rod 28, and a male thread 34 is formed, and the female thread 35, which is engaged with the male thread 34, is rotated in the forward and reverse directions. armrest 28
At the same time, the sub-shaft 26 is moved near and far from the main shaft 25. That is, a sprocket 36 is provided at the shaft end of the female screw 35 and connected to a sprocket 38 of a reversible rotating motor 37 for adjustment by a chain 39.

The supply hopper 11 includes a light emitting diode 4.
0 and a light receiving element 41 that detects the reflected light beam reflected by the rice grains.
is installed at an arbitrary lower limit grain amount position. Also,
The supply port 12 that supplies paddy to the unrolled rice 3 and 4 is provided with an opening/closing shutter 43 and a proximity switch 44 that detects the closing of the shutter 43.
to be placed. 45 is a position detecting magnet attached to the shutter 43, and 46 is a flow path for returned paddy rice provided in the supply hopper 11.

As shown in FIG. 3, the flow rate control valve 13 is provided with a proximity switch 47 forming an opening detector at a position opposite to the rod surface of the rotary rod 23 to detect an arbitrary lower limit flow rate. do. 48 is a position detection magnet attached to the rod surface.

Next, the control circuit 49 shown in FIG. 4 will be described in detail. An electromagnetic contactor contact MC is interposed in the main circuit connecting the power terminals R, S, and T and the main motor 50, and the electromagnetic contactor electromagnetic coil (MC) and a button switch ( ST) are connected in series. In addition, a current transformer 51 is connected to the terminal T circuit.
is provided, and a control circuit 49 is connected to its output side.
The control circuit 49 connects the input side of the integrator 52 to the output side of the current transformer 51, and connects the rectifier 53,
An over-input protector 54 is interposed, and the integrator 5
The output side of 2 is branched, and one end thereof is connected to the input one side terminal of the setting device 55, and the other end side is connected to the input one side terminal of the setting device 56, respectively. A load current upper limit value setting section 57 is connected to the other input terminal of the setting device 55;
A load current lower limit value setting section 58 is connected to the other input terminal of the setting device 56, respectively. The upper limit value and the lower limit value can be set, for example, by setting +2A (ampere) as the upper limit value and -2A as the lower limit value relative to the rated current value, or by setting a certain reference current value. It may be formed so that −0.5A is the upper limit value and the lower limit value. Then, the output side of the setter 55 is connected to one input terminal of the logic (AND) circuit 59, and the AND circuit 61 is connected to the other side terminal.
The output side of the logic (AND) circuit 59 is connected to the reversible rotating electric motor 37 for regulation via the forward rotation relay _R1 . Similarly, the output side of the setting device 56 is connected to one input side terminal of the logic circuit 60, and the AND circuit 61 is connected to the other side terminal, and the output side of the logic circuit 60 is connected to the motor 37 with the reversing relay R. Connect via ₂ . In addition, the AND circuit 61
A light receiving element 41 and a proximity switch 44 are provided on the input side of the
Connect 47. Note that the light receiving element 41 circuit may be directly connected to the logic (AND) circuits 59 and 60.

Next, the effect will be explained. First, turn on the power
Turn on the main motor 50 by pressing the button switch ST.
When is driven, the distance between derolling 3 and 4 is adjusted appropriately (initial setting). Then, the grains are supplied to the supply hopper 11 above the position of the photoelectric device 42,
With the opening/closing shutter 43 opened and the flow control valve 13 appropriately opened, that is, with the grain tank in the upper position so that grain storage can be continued, the mixed grains of paddy and brown rice are supplied from the flow outlet 16. Begins sorting action.

During operation, the gap between derolling 3 and 4 becomes too narrow, causing the load current of the main motor 50 to drop to the upper limit value setting unit 5.
When the set value of 7 is exceeded, the setter 55 side issues an output signal, and conversely, when the gap becomes too wide and the load current becomes smaller than the set value of the lower limit value setting section 58, the setter 56 side outputs an output signal. Each signal is input to the logic (AND) circuit 59 or 60, and the matching signal from the AND circuit 61 causes the reversible rotary motor 37 for adjustment to rotate forward or backward, and the rotation causes The arm lever 28 moves forward or backward through the rod 31, and the derolling period can always be adjusted normally.

In the sorting operation step, if the number of grains in the supply hopper 11 decreases to the lower limit flow rate, that is, the light receiving element 41 of the photoelectric device 42 no longer receives the reflected light from the grains, or if the opening/closing shutter 43 is closed and the proximity switch 44 issues a signal, the L signal is input to the logic (AND) circuit 59 or 60 via the AND circuit 61 to stop the operation of the reversible motor 37, and The area between the rolls 3 and 4 is locked in the same state, and wear of the rolls 3 and 4 and tearing of the brown rice are prevented. Further, when the flow rate control valve 13 moves upward and the proximity switch 47 serving as an opening detector for detecting the lower limit flow rate position issues a signal (i.e.,
When the grain tank 9 is almost full, the space between the rolls 3 and 4 is fixed in the same state as before to prevent roll abrasion and tearing of the brown rice. Ru. The position of the proximity switch 47 may be adjusted as appropriate.

〔Effect of the invention〕

According to the automatic control device for the de-sorting device of the present invention, it is configured so that the adjustment between rolls due to the load of the main motor can be stopped when the raw material flow rate fluctuates between the de-sorting section and the paddy/brown rice sorting section. , even when the amount of supply to the derolling stage is extremely reduced, the derolling interval can be maintained appropriately.
Stable unrolling work can be achieved without causing damage such as lacerations (skin abrasion) or crushing to unrolled brown rice, and by preventing unnecessary wear of unrolling.

[Brief explanation of drawings]

The drawings are illustrations of embodiments of the present invention. FIG. 1 is a side view of the deselection device, FIG. 2 is a cross-sectional view of its removal, FIG. 3 is a partially enlarged side view of the flow rate control valve, and FIG. 4 is its control circuit diagram. 1...Rice husk wind sorting chamber, 2...Box-shaped machine frame, 3, 4...
...Removal of rolls, 5.Removal of chambers, 6.. Oscillating sorting board, 7.. Vibration device, 8.. Oscillating sorting machine, 9..
Grain tank, 10...grain lifting machine, 11...supply hopper, 12...supply port section, 13...flow control valve,
14...Opening, 15...Paddy/brown rice mixed grain receiving trough, 16
...flow outlet, 17 ... supply gutter, 18 ... de-sorting device, 19 ... horizontal lever lever, 20 ... ammunition machine, 2
DESCRIPTION OF SYMBOLS 1... Fastener, 22... Connecting member, 23... Rotating rod, 24... Fixed flow plate, 25... Fixed rotating main shaft, 26... Moving rotating sub-shaft, 27... Base shaft, 28
... Arm rod, 29 ... Bearing, 30 ... Power point, 31 ...
... Rod, 32... Spiral launch, 33... Aircraft, 3
4...Male screw, 35...Female screw, 36...Sprocket, 37...Reversible rotating electric motor for adjustment, 38...
... Sprocket, 39 ... Chain, 40 ... Diode, 41 ... Photodetection element, 42 ... Photoelectric device for detection, 43 ... Opening/closing shutter, 44 ... Proximity switch, 45 ... Magnet, 46 ... Channel,
47... Proximity switch, 48... Magnet, 4
9... Control circuit, 50... Main motor, 51... Current transformer, 52... Integrator, 53... Rectifier, 54...
...Input protector, 55, 56...Setting device, 57...
Upper limit value setting section, 58... Lower limit value setting section, 59...
Logic (AND) circuit, 60...Logic circuit, 61...
...AND circuit.

Claims (1)

[Claims] 1 In addition to placing a supply hopper, a rice husk wind sorting chamber is provided at the bottom of the de-rolling chamber which is equipped with a pair of de-rollers driven by a main electric motor, and the mixed grains of paddy and brown rice discharged from the wind sorting chamber are lifted. A grain machine and a grain tank provided on the discharge side of the grain machine so as to be able to move up and down are used to supply the mixed grains of paddy and brown rice to a swinging sorting board, and the mixed grains of paddy and brown rice are separated into brown rice and mixed grains of paddy and brown rice using the swinging motion of the swinging sorting board. and 3 of paddy
In a de-sorting device designed to sort into seeds,
When the grain tank moves downward and upward in response to the increase and decrease of the mixed grains of paddy and brown rice inside it, the opening degree of the flow rate control valve provided in the supply section of the supply hopper also decreases and increases, respectively. The grain tank and the flow rate control valve are interlocked and connected so that the flow rate control valve is adjusted, and an opening degree detector for detecting the minimum opening position of the flow rate control valve is provided in association with the flow rate control valve; a setting device that sets an upper limit value and a lower limit value of the load in the output circuit of the opening degree detector and in the control circuit of the reversible rotary motor that adjusts the distance between the pair of derolling in relation to the load of the main motor; and the output side of the reversible rotary motor are connected to a relay for forward and reverse rotation of the reversible rotary motor via an AND circuit.