JPH0796101B2 - Removal control of hulling machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION “Industrial field of application” The present invention relates to a hulling machine that separates and removes paddy into brown rice and rice husk by a pair of derolling, and detects a change in driving load of the derolling from a current value or the like. The present invention relates to a removal rate control device that adjusts the roll gap so that the drive load matches the reference load and maintains the removal rate constant.

"Prior Art" When the opening degree of the supply valve changes and the amount of paddy supply for derolling changes, a means for controlling the roll gap by appropriately changing the reference value of the drive load for derolling is known. It is disclosed in Japanese Patent Laid-Open No. 58-17845.

"Problems to be solved by the invention" However, in the case of rice hull material (there is a large amount of branching or culm) whose supply amount is unstable due to the above means, the valve opening of the supply valve is kept constant, for example. Even if it is performed, the actual removal amount supplied to the derolling may fluctuate and the removal rate may change greatly.

[Means for Solving the Problems] Therefore, the present invention includes a roll load sensor for detecting the drive load of the derolling, and based on the comparison between the detected value of the load sensor and the set reference value, the derolling gap is set. In the structure designed to maintain a constant removal rate by controlling the control unit, a decontrolling means for interrupting the control of the roll gap when the load sensor detects a variation of a predetermined value or more from the reference value of the roll driving load, When the fluctuation of the roll driving load over a certain period continues for a predetermined time or longer, the roll driving load detected by the load sensor is input as a new control reference value at this time, and the roll gap control based on this reference value is performed thereafter. It is configured to do.

[Operation] Therefore, according to the present invention, stable removal rate control can be performed even when the amount of polished rice in the derolling changes depending on the hulling material, and when the roll driving load changes more than the set value. First, this roll gap control is interrupted to prevent a large change in the removal rate, and when this control interruption continues for a predetermined time or longer, it is determined that the paddy state is stable. The roll gap control is performed after the roll drive load is set as a new control reference value, and highly accurate hulling work is performed in which the removal rate is prevented from largely changing.

[Examples] Examples of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a partial explanatory view of a hulling section, and FIG. 2 is an overall sectional view of a hulling machine. In the figure, (1) is a paddy hull part, (2) is a supply hopper for loading paddy, (3) and (4) are a pair of derollers that are provided opposite to the lower part of the hopper (2), and (5) is the above A shutter for opening and closing the lower part of the hopper (2), (6) a deployment lever for emergency opening of the rolls (3), (4) by manual operation, and (7) for adjusting contact and separation of the rolls (3), (4). It is a removal rate motor.

In the figure, (8) is a wind-selecting section on which the hulling section (1) is mounted, and removes small rice from brown rice removing gutter (9) and brown rice conveyor (10) and brown rice falling on the gutter (9). Karato (11)
And the derolling rolls (3) (4) through the small rice pick-up gutter (12) and the small rice conveyor (13) that carry the small rice out of the machine, and the grain scattering plate (14) and the flow grain plate (15). Sliding-off rice picking gutter (16) and sliding-off rice conveyor (17) facing down and receiving scraped-off rice (brown rice and paddy); A rice porridge conveyor (19) and a dust suction and exhaust fan (20) for discharging the rice husks separated from the scraped rice to the outside of the machine.

Further, in the figure, (21) is a sorting section which is mounted on the wind selecting section (8) and is installed in parallel with the hulling section (1), and as shown in FIG.
Upper and lower sorting cylinders (22) and (23) for continuous rotation in one direction to separate brown rice and paddy, and bearing rolls (24) for supporting the cylinders (22) and (23) rotatably, respectively (25) )…When,
A mixed rice supply tank (26) provided outside one end of the upper selection cylinder (22), a supply conveyor (27) inserted in the upper selection cylinder (22), a re-graining conveyor (28), and a brown rice receiving conveyor (29). , A brown rice receiving conveyor (30) to be inserted into the lower sorting tube (23), a rice sorting machine (31) provided between the upper and lower brown rice receiving conveyors (29) (30) and connected in series, and an upper sorting tube The chute (32) for communicating the paddy discharge end of (22) with the hopper (2) and the re-graining conveyor (28) are connected to the lower sorting cylinder (23).
To the rice picking gutter (16) by sliding down the mixed rice discharge end of the lower sorting tube (23) to the rice picking gutter (16), and the brown rice receiving conveyor (30) to the brown rice picking gutter (9). ) Is connected to the chute (35).

Then, a brown rice lifting conveyor (36) for communicating the lower end side with the brown rice conveyor (10), and the scraped rice conveyor (17)
And a sorting rice lifting conveyor (37) that communicates the lower end side to the stand along the outside of the machine, and connects the upper end of the sorting rice lifting conveyor (37) to the supply tank (26) with a pipe ( 38) to communicate with each other, and the slid-off rice from the paddy hull (1) and the return-mixed rice from the sorting cylinder (23) are merged and put into the supply tank (26).

Furthermore, the hulling section (1), the wind selecting section (8) and the selecting section (2
A hulling motor (39) for driving 1) is provided, and the derolling rolls (3), (4) are driven by the hulling motor (39).

As shown in FIG. 1, the derolling rolls (3) and (4) are arranged in a hulling case (41) communicating with the lower part of the paddy discharge port (40) of the supply hopper (2). (42) (4
The derolling rolls (3) and (4) axially supported by 3) are opposed to each other, the transmission gears (44) and (45) are axially supported by the support shafts (42) and (43), respectively, and the hulling case (41 ) Is provided with a gear case (46), and the gears (44) and (45) are attached to the case (4
6) Install inside. The drive gears (49) and (50) are axially supported in the case (46) through the power shafts (47) and (48), and the gears (44) (45) and (49) (50) are constantly meshed. In addition, the support shaft (43) of one of the derolling rolls (4) is pivotally supported in the middle of the gap adjusting link (51), and one end of the link (51) is coaxial with the one power shaft (48). To support.
A clearance adjusting shaft (54) interlockingly connected to the demotor (7) through gears (52) (53) is provided, and the shaft (54) is provided at the other end of the link (51) through a bearing member (55). ) The screw portion (54a) at one end is screwed and connected, and the roll gap (56) of each roll (3) (4) into which the paddy is put in is automatically enlarged / reduced by the forward / reverse control of the motor (7). At the same time, a removal rate adjusting handle (57) is attached to the other end of the shaft (54), and the roll gap (56) is manually enlarged or reduced by rotating the handle (57).

Further, a paddy flow rate control valve (58) which is a supply valve for adjusting the paddy flow rate below the paddy discharge port (40), and the rolls (3) and (4).
And a feeding roll (59) for supplying paddy to the paddle, the opening of the control valve (58) is adjusted by the adjusting bolt (60), and the opening state of the valve (58) is detected by a potentiometer (61). It is configured to do in.

As shown in FIG. 4, a current value sensor (62) which is roll load detecting means for detecting the drive load of the hulling motor (39).
And a disconnection control circuit (64) which is a disconnection control means for input-connecting a disconnection rate setting device (63) for setting an initial control current value, which is the reference value, to the reverse removal motor (7). When the control circuit (64) is connected via the drive circuit (65) and the detected value of the sensor (62) changes with respect to the initial control current value set by the removal rate setting device (63). It is configured to drive the removal motor (7) to control the roll gap (56) in a matched state.

This embodiment is constructed as described above, and its operation will be described below with reference to the flowchart of FIG.

At the time of removal work, the initial control current value (A1), which is the reference value set by the setting device (63), is read into the control circuit (64), and thereafter the current value (A1) stored in the circuit (64). The roll gap (56) is controlled based on the comparison with the current value (A2) which is the detection value sampled by the sensor (62) with reference to. That is, the difference (A1-A2) between the control current value (A1) and the detected current value (A2) is within ± 2% of the control current value (A1), that is, within the dead zone where the control current value (A1) is ± 2%. The roll gap (56) is constantly controlled so that the detected current value (A2) enters the control current value (A1). )
Of the roll gap (5
6) Interrupt the control. And when the interruption is over 3 minutes, the paddy state (amount of polished rice) in derolling (3) (4)
Is judged to be stable in this state, and at this time, the control circuit (64) stores the detected current value (A2) input via the sensor (62), and thereafter this current value (A2) is newly stored. The control current value (A1) is changed to another control current value, and the same control as described above is continuously performed. As a result, the valve (5
Even if the valve opening of 8) is constant and the actual amount of polished rice varies, it is possible to maintain the predetermined removal rate substantially constant without changing it more than the initially set removal rate. It is possible.

"Effects of the Invention" As is apparent from the above embodiments, the present invention is provided with the roll load sensor (62) for detecting the drive load of the derolling (3) (4), and the detection value of the load sensor (62). In the structure in which the clearance (56) between the derolling rolls (3) and (4) is controlled based on the comparison between (A2) and the set reference value (A1), the derolling rate is kept constant. (6
When the 2) detects a fluctuation of the roll driving load that is greater than a certain value from the reference value (A1), the de-controlling means (64) that interrupts the control of the roll gap (56) is provided, and the fluctuation of the roll driving load is more than a certain value. Is continued for a predetermined time or longer, the roll drive load detected by the load sensor (62) at this time is input as a new control reference value (A1) and thereafter this reference value (A
Since roll gap control based on 1) is performed,
Even when the actual amount of polished rice in the derolling (3) and (4) is changed depending on the hulling material, it is possible to perform a stable debending rate control without varying the debending rate, which is a remarkable effect. .

[Brief description of drawings]

FIG. 1 is a partial explanatory view of a hulling section, FIG. 2 is an overall cross-sectional view of a hulling machine, FIG. 3 is a side view of the hulling machine, FIG. 4 is a control circuit diagram, and FIG. 5 is a flowchart. (3) (4) ... Derolling (56) ... Gap (62) ... Load sensor (64) ... Deregulation means (A1) ... Reference value (A2) ... Detected value

Claims (1)

[Claims] 1. A roll load sensor for detecting the drive load of the derolling is provided, and the derolling gap is controlled on the basis of the comparison between the detected value of the load sensor and this set reference value to maintain the derolling rate constant. In the structure as illustrated, a de-control means is provided for interrupting the control of the roll gap when the load sensor detects a fluctuation of the roll driving load above a reference value, and the fluctuation of the roll driving load above the constant is provided. When it continues for a predetermined time or more, the roll drive load at this time detected by the load sensor is inputted as a new control reference value, and thereafter the roll gap control is performed based on this reference value. Dehulling rate control device for rice hullers.