JPH0794015B2 - 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 supplied to the derolling changes, there is a means to appropriately change the reference value of the drive load of the derolling. When the valve opening changes with a constant value, the roll driving load, that is, the current value correspondingly changing as shown in the basic line of FIG. 6 (a) is stored again as the reference value after the valve opening is changed. There are some that are controlled.

"Problems to be solved by the invention" However, in the case of the hulling material (there is a large number of branch stems and culms) whose supply amount is unstable according to the above-mentioned means, the valve as shown in the line (b) of Fig. 6 is used. When the roll drive load with respect to the opening, that is, the current value fluctuates, and the valve opening is usually small as shown in the basic line in FIG. 6A, the current value is small and the valve opening is large. In contrast to the case where the current value is also large, for example, the maximum current value at the time of fluctuation that is larger than the current value before this change is read even though the valve opening is small and the paddy supply amount has decreased In that case, there is a drawback that the control is performed with this erroneous value as a reference and the proper removal rate cannot be maintained.

"Means for Solving Problems" Therefore, the present invention detects a valve opening sensor that detects a change in valve opening of a supply valve that adjusts the amount of paddy supply for derolling, and a drive load for the derolling. A roll load sensor and a de-control means for inputting the roll load as a control reference value when the roll gap is constant and the roll driving load appropriately changes in response to a change in the valve opening. The roll gap is controlled so that the driving load is maintained constant.

[Operation] Therefore, according to the present invention, even under the condition that the supply amount of the hull material is unstable and the roll drive load varies greatly with respect to the valve opening, an appropriate roll drive load can be obtained without post-operation. After reading, it is possible to maintain a constant release rate by performing accurate roll gap control based on the drive load. In this case, the control circuit is simple and adjustment is easy because it is controlled by relative values. The control can be performed regardless of various motor characteristics.

[Examples] Examples of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a partial view of a hulling portion, FIG. 2 is an overall view of a hulling machine, and FIG. 3 is a sectional view of the 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 mounted on the wind selecting section (8) and arranged 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 removal ratio motor (7) via gears (52) (53) is provided, and the shaft () is provided at the other end of the link (51) via a bearing member (55). 54) The screw gap (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 or reduced by controlling the motor (7) in the forward and reverse directions. In addition, a removal rate adjusting handle (57) is attached to the other end of the shaft (54), and the hull 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 valve, and 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 valve opening sensor. The potentiometer (61), which is a device, is used.

As shown in FIG. 5, a current value sensor (62) which is a roll load sensor for detecting the drive load of the hulling motor (39).
And a potentiometer (61) and a shutter release switch (63) which is a paddy sensing sensor for detecting the opening operation of the shutter, and a disconnection control circuit (64) serving as disconnection control means. The control circuit (64) is connected to the motor (7) through the forward / reverse drive circuit (65),
When the valve opening (X) is maintained at the set state, the roll gap (56) is adjusted based on the detection by the current value sensor (62) to control the release rate constant, while the set valve opening (X) is set. When the valve opening (X) to be sampled during work changes with respect to the degree (X) and the detected current value (A) of the sensor (62) changes corresponding to the valve opening change, the detected current value (A) is stored in the control circuit (64) as a new set value, and thereafter the roll gap (56) is adjusted with this current value (A) as a reference so that the constant removal rate is controlled. Is configured.

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 control valve (58) is adjusted to a desired set valve opening (X1), and the current value (A1) at that time is adjusted to the sensor (6).
By reading in 2), decontrol using these as reference values is performed thereafter. That is, the valve opening (X) is appropriately sampled by the potentiometer (61) during this operation, and the valve opening (X2) detected by the sampling is set between the set valve opening (X1). No change,
When there is no change between the current value (A2) detected by the sensor (62) and the set current value (A1), the work is continued, and only the current value (A1) (A2) changes. At this time, the roll gap (56) is expanded or reduced by the removal rate motor (7) so as to match the current value (A2) with the set current value (A1), and the removal rate is maintained constant at the setting state.

On the other hand, during operation, the valve opening changes to open or close to cause a difference (X2> X1 or X2 <X1) between the set valve opening (X1) and the sampling valve opening (X2). The same tendency difference (A2> A1 or A2 <A) between the current values (A1) and (A2)
1) occurs, the valve opening (X2) and current value (A2) after the change are the new set valve opening (X1) and set current value (A1).
Are stored again in the control circuit (63) and the same control as described above is performed with these values as a reference. That is, when the sampled valve opening (X2) changes to the + side, which is larger than the set valve opening (X1), or to the − side, which is smaller than the set valve opening (X1), the current value (A2) sampled correspondingly is also changed. As shown in FIG. 6 (a), when the state changes to the + side which becomes large or the − side which becomes small based on the basic line, the sampled current value (A2) is judged as a normal value, not an erroneous value due to fluctuations. After that, the set current value (A1) is stored again and the control is performed. When these valve opening (X2) and current value (A2) do not correspond, the set current value (A1) is read. Put on hold. In this way, since the withdrawal rate control is performed based on the current value (A) read every time the valve opening (X) changes, the approximately withdrawn rate can be easily obtained by an extremely simple means.

"Effects of the Invention" As is clear from the above examples, according to the present invention, the supply valve (5) for adjusting the amount of paddy supplied to the derolling rolls (3) and (4) is adjusted.
8) The valve opening sensor (61) for detecting the change in valve opening, the roll load sensor (62) for detecting the drive load of the derolling rolls (3), (4), and the roll gap (56) are constant. A de-control means (64) for inputting the drive load as a control reference value when the roll drive load appropriately changes in response to the change in the valve opening is provided so as to maintain the drive load constant after the change in the valve opening. Since it is configured to control the roll gap (56), even under the condition that the roll driving load fluctuates greatly with respect to the valve opening (X) in the hulling work in which the supply amount becomes unstable. , It is possible to read a proper roll drive load without malfunction and to perform accurate roll gap control with the drive load as a reference thereafter to maintain a constant loss ratio, and in this case, control with relative values. The structure is simple and adjustments are easy. A marked effect like can be performed independently controlled characteristics.

[Brief description of drawings]

FIG. 1 is a partial explanatory view of a hulling portion, FIG. 2 is an overall view of a hulling machine, FIG. 3 is a front view of the same section, FIG. 4 is a side view of the same section, FIG. 5 is a control circuit diagram, and FIG. FIG. 6 is an explanatory diagram showing the relationship between the valve opening and the roll driving load, and FIG. 7 is a flowchart. (3) (4) …… Roll removal (56) …… Roll gap (58) …… Supply valve (61) …… Valve opening sensor (62) …… Roll load sensor (64) …… Release control means

Claims (1)

[Claims] 1. A valve opening sensor that detects a change in valve opening of a supply valve that adjusts the amount of paddy supplied to derolling, a roll load sensor that detects a drive load of the derolling, and a roll gap that is constant. When the roll drive load appropriately changes in response to the change in the valve opening, there is provided de-controlling means for inputting this drive load as a control reference value, and the roll gap is maintained so as to maintain the drive load constant after the change in the valve opening. A removal rate control device for a huller, which is configured to control the