JPH0626675B2 - Dehulling control device for huller - Google Patents

Description

TECHNICAL FIELD The present invention relates to a decontrolling device for a hulling machine that separates and removes paddy from brown rice and rice husks by a pair of derolling.

“Prior Art” Conventionally, for example, as disclosed in Japanese Patent Laid-Open No. 59-26144, a load sensor for detecting a change in driving load of a hulling motor that drives a pair of derolling rolls is provided, and a load sensor is used based on the output of the load sensor. While controlling the adjustment member to keep the removal rate substantially constant,
There has been a technique of detecting the paddy supply amount of derolling and changing the drive load reference value of the paddy hull motor.

"Problems to be solved by the invention" The above-mentioned conventional technology corrects the drive load reference value of the hulling motor based on the change in the paddy supply amount of the derolling, and performs the removal rate automatic control based on the motor load. When the dead zone that prevents the hunting operation of the de-adjustment member is set around the standard de-wetting rate, the de-rate rate control changes due to the change in the paddy supply rate because the reference value deviates from the center of the dead-zone width due to the change in the paddy supply rate. It is performed unevenly between the rate side and the high rate side, the relationship between the roll rate and the motor load cannot be easily obtained as initially set, and the rate automatic control is unstable. There was a problem.

"Means for Solving the Problem" However, the present invention includes a hulling motor that drives mono-rolling derolling, and a load sensor that detects a change in the driving load of the hulling motor. Based on the output of the supply amount sensor that detects the amount of paddy to be supplied to the derolling roll, while automatically controlling the deregulation member that changes the sliding gap and adjusts the removal rate of rice that has slid off, based on the output of the load sensor. In a deregulation device provided with means for correcting the load sensor output, a dead zone width of a derate ratio automatic control value with respect to a reference derate value of a reference derate rate setting device is corrected based on the supply amount sensor output to obtain a load sensor output. The present invention is characterized in that means for regulating the output of the automatic removal rate control based on the above is provided.

Therefore, even if the paddy supply amount of the roll changes, the dead zone width of the de-adjustment member is corrected at the same time as the drive load of the hulling motor is corrected based on the change of the paddy supply amount of the derolling roll. It is possible to keep the release rate control range of the release adjustment member substantially constant,
A desorption rate within a certain range centered on the reference desorption rate can always be obtained, and the dehulling rate control operation can be stabilized more than before by keeping the hull gap control error of the roll substantially constant with respect to the reference desorption rate. , The de-rate control sensitivity based on the change of the driving load of the motor can be made substantially constant, and the actual de-work can be performed at a de-rate within a certain range. This simplifies initial adjustment and the like.

[Examples] Examples of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a hulling control circuit diagram, FIG. 2 is an overall view of a hulling machine, and FIG. 3 is a sectional view thereof. In the figure, (1) is a paddy hull part, (2) is a feed hopper for loading paddy, (3) (4) is a pair of derollers attached to the lower part of the hopper (2), and (5) is the hopper (2)
A shutter for opening and closing the lower part, (6) is a deployment lever for emergency opening of the rolls (3), (4) by a manual operation, and (7) is a de-adjustment member for adjusting the rolls (3), (4) to move toward and away from each other. It is a de-rater motor.

In the figure, (8) is a wind-selecting section on which the hulling section (1) is mounted, and removes the small rice from the brown rice removal gutter (9) and the brown rice conveyor (10) and the brown rice falling on the gutter (9). Karako (11) and a small rice pick-up gutter (12) and a small rice conveyor (13) that carry the small rice out of the machine.
Through the grain-scattering plate (14) and the flow-through plate (15), and facing the lower part of the derolling rolls (3) (4) to receive the scraped rice (brown rice and paddy). ) And scraped rice conveyor (17)
And the rice porridge gutter that receives the rice porridge separated from the scraped rice (1
8) and a rice porridge conveyor (19), and a dust suction / exhaust fan (20) for discharging the rice husks separated from the scraped rice to the outside of the machine.

In the figure, (21) is a sorting section which is placed on the wind selecting section (8) and is installed in parallel with the hulling section (1). As shown in FIG. Upper and lower sorting cylinders (22) to separate the
(23), support rolls (24) ... (25) ... which support the tubes (22) and (23) rotatably respectively, and a mixed rice supply tank (26) provided outside one end of the upper selection tube (22). ), And a feed conveyor (27) and a re-graining conveyor (28) and a brown rice receiving conveyor (29) to be inserted in the upper sorting cylinder (22), and a brown rice receiving conveyor (30) to be inserted in the lower sorting cylinder (23). And a rice selector (31) installed between the upper and lower brown rice receiving conveyors (29) and (30) to connect them in series, and an upper sorting tube (2
Chute (32) that connects the paddy discharge end of (2) to the hopper (2)
A chute (33) that connects the re-graining conveyor (28) to the lower sorting cylinder (23), and a chute (34) that slides down the mixed rice discharge end of the lower sorting cylinder (23) to communicate with the rice picking gutter (16). ) And a shoot that connects the brown rice receiving conveyor (30) to the brown rice removing gutter (9)
(35) and

And a brown rice lifting conveyor (36) that communicates the lower end side to the brown rice conveyor (10), and a sorted rice lifting conveyor (37) that communicates the lower end side to the scraped-off rice conveyor (17) outside the machine. Along with standing along it, the supply tank (26) is connected to the upper end of the selection rice lifting conveyor (37) by a connecting pipe (38), and the rice scraped from the paddy hull (1) and the above Sorting cylinder
The return mixed rice from (23) is combined and put into the supply tank (26).

Further, the supply tank (26) is provided with an overflow gutter (39) communicating with the upper end side, and an opening / closing valve (40) is attached to the lower end opening of the overflow gutter (39) which faces the upper surface of the supply hopper (2). The excess mixed rice in (26) is returned to the supply hopper (2) through the overflow gutter (39), and the on-off valve (40) is proportional to the increase in the amount of mixed rice returned to the supply hopper (2). Is configured to open.

Furthermore, a hulling motor (41) for driving the hulling section (1), the wind selecting section (8) and the sorting section (21) is provided, and the derolling rolls (3) and (4) are provided by the hulling motor (41). It is configured to drive.

FIG. 5 is an explanatory view of the hulling section (1), in which the derolling rolls (3) and (4) axially supported by the support shafts (42) and (43) face the hulling case (44). And the transmission shafts (42) and (43) are pivotally supported by the transmission gears (45) and (46), and the hull case (44) has a gear case (47).
And the gears (45) and (46) are internally provided in the case (47). The drive gears (50) and (51) are supported in the case (47) through the power shafts (48) and (49), and the gears (45) (46) and (50) (51) are supported.
And the support shaft (43) of one of the derolling rolls (4) is supported in the middle of the gap adjusting link (52), and one end of the link (52) is the same as one of the power shafts (49). Support on the axis. A clearance adjusting shaft (55) interlockingly connected to the removal ratio motor (7) through gears (53) and (54) is provided, and the shaft (a) is provided at the other end of the link (52) through a bearing member (56). Five
5) Screw the screw part (55a) at one end into the motor (7)
The roll clearance (57) of each roll (3) (4) that throws in the paddy is automatically adjusted by enlarging or reducing the paddle by controlling the forward and reverse rotations of The hull gap (57) is manually adjusted to be enlarged or reduced by mounting and rotating the handle (58).

Further, a feeding roll (59) provided above the derolling rolls (3) and (4) and below the shutter (5) for dropping the paddy from the supply hopper (2) between the rolls (3) and (4), and the feeding roll (59). Supply valve (60) for adjusting the amount of paddy dropped from the roll (59), and potentiometer-type supply that detects the amount of paddy supplied to the derolling rolls (3), (4) in conjunction with the opening / closing operation of the valve (60). A quantity sensor (61) is provided, and the supply valve (60) and the opening / closing valve (40) are interlockingly connected by a wire (62) or the like, and the supply valve is proportional to the opening movement of the opening / closing valve (40).
(60) is closed and configured to automatically adjust the amount of paddy supplied to the derolling rolls (3) and (4) so as to constantly feed a fixed amount of mixed rice to the sorting section (21). There is.

Further, a photoconductive type sliding-down rice sensor (65) consisting of a light-emitting element (63) and a light-receiving element (64) arranged to face the hulling case (44) below the derolling rolls (3) and (4). Comprising the roll
(3) (4) The amount of slid-off rice falling downward is detected by the sensor (65).

As shown in FIG. 1, a current transformer (66) which is a load sensor for detecting a change in driving load of the hulling motor (41), and a reference for initially setting the removal rate of the derolling rolls (3), (4). Elimination rate setting device (6
7) and, the current change of the power supply (R, S, T) of the motor (41) proportional to the drive load change of the derolling (3) (4) is detected by the current transformer (66), Hull gap (57) of derolling (3) (4)
Change and the change in the desorption rate due to the change in the amount of paddy supplied.
It is configured to detect based on the load current output of 6).

Further, the supply amount sensor (61) and the current transformer (66) are input-connected to the differential amplifier (68) via the buffers (69) and (70), and the output of the sensor (61) and the current transformer (66). The difference between the output and the amplifier (68)
Output from the current transformer based on the output of the sensor (61)
(66) De-rate adjustment for correcting the output, and comparing the output of the amplifier (68) with the output of the reference de-rate setting device (67) to judge the de-rate change based on the load current change of the motor (41). It is equipped with comparators (71) and (72), and the reference power source input side of the setting device (67) is connected to the supply amount sensor (61) via the buffer (69) and supplied to the derolling rolls (3) and (4). The standard removal rate is corrected by the change in the amount of paddy, and the comparator (71) is based on the change in the hulling load regardless of the change in the amount of paddy supplied from the derolling (3) (4).
(72) is configured to detect a change in the withdrawal rate.

Furthermore, the output of the comparator (71) (72) and the supply amount sensor (6
1) Equipped with a dead zone setting comparator (73) (74) that compares the output, and the dead zone output range of the dead rate based on the output of the sensor (61) is determined by the comparator (73) (74), and the reference dead rate The dead band width of the output of the removal rate adjustment comparator (71) (72), which is the removal rate control value for the sensor, is corrected by the output of the sensor (61), and the reference removal is performed regardless of the change in the paddy supply amount of the derolling (3) (4). The dead zone width of the rate-releasing control centered on the rate is kept substantially constant.

As is clear from the above, a hulling motor (41) for driving the pair of derolling (3) (4) and a load sensor (66) for detecting a change in the driving load of the hulling motor (41) are provided. The output of the load sensor (66) is the removal rate motor (7), which is a removal adjustment member that adjusts the removal rate of the rice that has been removed by changing the paddy clearance (57) of the removal rolls (3) and (4). Based on the output of the supply amount sensor (61) that detects the amount of paddy supplied to the derolling rolls (3) and (4), the load sensor (66) is a differential unit that corrects the output. In the release control device provided with the amplifier (68), the dead band width of the removal rate automatic control value with respect to the reference removal rate setting device (67) is set to the supply amount sensor (61).
A dead zone setting comparator (73) (74), which is a means to correct the output based on the output of the load sensor (66) and regulate the output of the automatic removal rate control based on the output, is provided for the paddy supply amount of the derolling (3) (4). Based on the change, the drive load of the hulling motor (41) is corrected and the dead zone width of the removal rate motor (7) is corrected at the same time.

On the other hand, a forward / reverse relay switch is attached to the removal motor (7).
Equipped with open and close relays (77) and (78) that control the application of drive power via (75) and (76), and each relay (77) and (78) has a driver (7
9) With the output connection of the dead zone setting comparators (73) and (74) via (80), an automatic switch (81) for switching the removal rate control to an automatic mode is provided, and each relay (81) is provided to the switch (81). 77) (78) are connected in parallel, and the comparator (73) (74)
The relays (77) and (78) are operated and controlled based on the output, and the motor (7) is rotated forward and backward to enlarge and reduce the grain clearance (57), and the derolling ratio of the derolling rolls (3) and (4) is adjusted. Is configured to be kept substantially constant.

Also, a high escape rate indicator (82) and a low escape rate indicator (83) are connected in parallel to the relays (77) and (78), respectively, and the dead zone setting comparators (73) and (74) outputs are turned off. A driver that sometimes detects this and turns on the appropriate escape rate indicator (84)
(85) (86) while providing an automatic indicator (87) for displaying the ON operation of the automatic switch (81), each of the indicators (82)
(83) (84) (87) are connected to the automatic switch (81) respectively, and each indicator (82) (83) (84) that displays the detached state only during automatic control
Is configured to operate.

Next, equipped with overload detection comparator (88) and underload detection comparator (89), each comparator (88) (89)
Input the current transformer (66) via the buffer (70) (90) to
When the overload detection comparator (88) is connected to the opening relay (77) via the driver (79) and the drive load of the hull motor (41) exceeds the set range, the comparator
(88) The opening relay (77) is activated based on the output to expand the hull clearance (57) of the derolling (3) (4) and the underload detection comparator (89) via the driver (80). Connected to the closing relay (78), and the comparator (8
9) Actuating the closing relay (78) based on the output to reduce the hull gap (57) of the derolling rolls (3) and (4), and
Dead band setting comparator within the drive load range of (41) (73) (7
4) It is configured to control the removal rate based on the output.

Further, it is connected between each of the comparators (73) (74) and (88) (89) and the driver (79) (80) to open and close the relay (77) (7).
8) Equipped with a de-control driver (91) that regulates the control, connect the driver (91) with the slid rice sensor (65), and the amount of slid rice that falls below the de-roll (3) (4) is not correct. Each comparator (73) (74) and (88) (89) at the time of sufficient hulling start
The relays (77) and (78) are continuously excited based on the output, and the CR type ON delay circuit (93) having the discharge time adjuster (92) and the output are generated intermittently at regular intervals. A rice sensor (6) equipped with a timer (94) and slid onto the driver (91) through the delay circuit (93) and the timer (94) provided in series.
5) is connected, and when the amount of scraped rice falling below the derolling (3) (4) increases above the set value, the timer (94) is activated after a certain time set by the delay circuit (93), and the De-controlled driver by intermittent output of the timer (94) at regular intervals
(91) is on / off controlled and each comparator (73) (74) and (8
8) Based on the output of (89), each of the relays (77) and (78) is intermittently excited at regular intervals, while the discharge time adjuster is activated.
(92) delays the reset operation of the delay circuit (93),
This is to prevent the timer (94) operation from being interrupted due to a momentary break of the scraped rice, etc.
Is continuously controlled, and the motor (7) is intermittently controlled at regular intervals when the amount of scraped rice is above a certain level.

The present invention is configured as described above, and the hulling motor (41)
This power (R, S, T) is applied to the power supply, the automatic switch (88) is turned on, and the paddy is put into the supply hopper (2) to start the hulling work. Since the amount of slid rice that falls below the derolling rolls (3) and (4) is small, the deregulation driver (91) is kept off via the slidoff rice sensor (65) and the rice hull motor (41) The driving load is also small, the underload detection comparator (89) is activated by the underload output of the current transformer (66), and the closing relay (78) is continuously excited based on the output of the comparator (89), The removal rate motor (7) is operated via the relay switch (76) of the relay (78) to reduce the hull gap (57).

When the drive load of the hulling motor (41) detected by the current transformer (66) rises above the setting, the output of the current transformer (66) and the output of the reference derate setting device (67) are adjusted to the derate adjustment comparator. (7
1) Compared with (72), when the load of the motor (41) is higher than the setting, the opening relay (77) is excited by the comparators (71) (73) and the driver (79), and the derating motor (7) is opened to expand the hull gap (57), while when the motor (41) load is below the set value, the closing relay ((7) is passed through each comparator (72) (74) and driver (80). 78) is excited and the de-rate motor (7) is closed to reduce the grain clearance (57).
When the amount of scraped rice under the derolling rolls (3) (4) detected by the scraped-off rice sensor (65) was small, the removal rate motor (7) was opened and closed by continuous control. When the amount of rice scraped off detected by exceeds the set value, the on-delay circuit (93) delays the timer (94) for a certain period of time, and the decontrol driver (9) operates based on the output of the timer (94).
1) is turned on and off at regular intervals, and the de-rate motor (7) is controlled at regular intervals by intermittent control at regular intervals.

Further, the return mixed rice taken out from the selection tube (23) of the selection section (21) through the chute (34) increases, and the return mixed rice and the scraped rice from the hulling section (1) join together. When the amount of mixed rice in the supply tank (26) to be added increases, excess rice in the tank (26) returns from the overflow gutter (39) to the supply hopper (2), and from that gutter (39). The on-off valve (40) is opened (closed) in proportion to the increase (decrease) in the mixed rice amount returned to the hopper (2), and the supply valve (60) is closed (linked) with the on-off valve (40). The amount of paddy fed to the derolling rolls (3) and (4) is decreased (increased) to keep the mixed rice amount inside the sorting section (21) substantially constant, as shown in FIG. So deroll
(3) When the paddy supply amount of (4) changes, the drive load of the hulling motor (41) changes with respect to the standard desorption rate, and at the same time, the dead band width (X) of the desorption rate control centered on the standard desorption rate. In contrast, the load widths (A) (B) (C) of the motor (41) change.

Therefore, the amount of paddy supplied to the derolling (3) (4) is detected by the supply amount sensor (61), and the output of the current transformer (66) is output to the differential amplifier (68) based on the output of the sensor (61). The output of the sensor (61) is used to correct the output of the reference rate setting device (67) applied to the rate adjustment comparators (71) and (72). The motor (41) load output of the current transformer (66) corrected by the output and the reference de-rate output of the setter (67) are compared by the comparators (71) and (72), and are almost the same as the standard paddy supply amount. In this state, the change of the removal rate is detected based on the load change of the motor (41), and the removal roll (3) (4)
Despite the change in the amount of paddy supplied, the high or low loss rate output is obtained from each of the comparators (71) and (72) as in the standard time described above.

In addition, the dead zone setting comparator (73) based on the paddy supply amount output of the supply amount sensor (61) (73) (74) to correct the output dead zone,
Regardless of changes in the amount of paddy supplied to the derolling rolls (3) and (4), the control dead zone of the derolling rate motor (7) is kept approximately constant and the derolling is performed.
(3) The control error of the hull clearance (57) of (4) is kept substantially constant with respect to the standard removal rate.

Further, by the correction operation of the supply amount sensor (61), the amount of paddy supplied to the derolling (3) (4) increases abnormally, and the drive load of the paddy hull motor (41) becomes larger than the setting, Overload detection comparator by overload output of current transformer (66)
(88) is activated, the open relay (77) is continuously excited based on the output of the comparator (88), the de-rate ratio motor (7) is opened, and the hull gap (57) is expanded. The above-mentioned removal rate control is performed by changing the load of the motor (41) within a certain range.

"Effects of the Invention" As is apparent from the above embodiments, the present invention is a hulling motor (41) that drives a pair of derolling rolls (3) and (4), and a driving load change of the hulling motor (41). And a load sensor (66) for detecting, and a de-adjusting member (7) for adjusting a rice removal rate by changing the hull gap (57) of the de-rolling (3) (4) to remove the rice. (66) The output is automatically controlled based on the output, and the output of the load sensor (66) is corrected based on the output of the supply amount sensor (61) that detects the amount of paddy supplied to the derolling (3) and (4). In the release control device provided with means (68), the dead band width of the removal rate automatic control value with respect to the reference removal rate setting device (67) is adjusted based on the output of the supply amount sensor (61) to adjust the load sensor. (66) De-rolling rate based on output Output means for regulating output (73) (74)
By correcting the drive load of the hulling motor (41) based on the change in the paddy supply amount of (4) and simultaneously correcting the dead zone width of the de-adjustment member (7), the hulls of the rolls (3) and (4) are corrected. Even if the supply amount changes, the removal rate control range of the deregulation member (7) can be kept substantially constant, and the removal rate within a certain range centered on the reference removal rate can always be obtained. 3) (4) hull gap
(57) The control error can be kept substantially constant with respect to the reference release rate to stabilize the release rate control operation more than before, and the release rate control sensitivity based on the drive load change of the motor (41) is substantially constant. It is possible to perform the actual removal work at a removal rate within a certain range, and to set the operating functions of the sensors (61) and (66) and the deadjustment member (7) and make initial adjustments during assembly. The simplification can be easily achieved.

[Brief description of drawings]

FIG. 1 is a hulling control circuit diagram showing an embodiment of the present invention, and FIG.
FIG. 3 is an overall view of a huller, FIG. 3 is a front view of the same section, FIG. 4 is an enlarged cross-sectional side view, FIG. 5 is an explanatory view of a hulling section, and FIG. 6 is a load sensor output diagram. (3) (4) …… Derolling (7) …… Derating motor (deadjusting member) (41) …… Hulling motor (57) …… Hulling gap (61) …… Supply amount sensor (66) …… Current transformer (load sensor) (67) …… Reference derate setting (68) …… Differential amplifier (73) (74) …… Dead zone setting comparator

Front Page Continuation (72) Inventor Kazuhiro Morimoto 203 Satokaida, Nankoku City, Kochi Prefecture Seirei Industrial Co., Ltd. Kochi Factory (56) References JP 59-26144 (JP, A)

Claims (1)

[Claims] 1. A hulling motor (41) for driving a pair of rolls (3), (4), and a load sensor (66) for detecting a change in driving load of the hulling motor (41), While automatically controlling the deregulation member (7) that changes the hull gap (57) of the derolling (3) (4) and adjusts the rice removal rate by sliding off, based on the output of the load sensor (66), In the deregulation device provided with means (68) for correcting the output of the load sensor (66) based on the output of the supply amount sensor (61) for detecting the amount of paddy supplied to the derolling (3) (4), The dead band width of the removal rate automatic control value with respect to the reference removal rate value of the removal rate setter (67) is set to the supply amount sensor.
(61) A decontrolling device for a huller, comprising means (73) (74) for correcting the output based on the output of the load sensor (66) to regulate the output of the automatic derate control based on the output.