JPS60225654A - Control of roll gap in hulling apparatus - 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 The present invention relates to a roll gap control method in a rice hulling device.

A device that automatically adjusts the roll gap of a hulling device using a dehulling rate sensor is known. This device is equipped with a sensor that measures the dehulling rate of unhulled rice at a desired location, and compares the dehulling rate measured by this sensor with the standard dehulling rate to control the roll gap adjustment motor. Although the roll gap can be adjusted to obtain a desired dehulling rate, this device does not function properly until a predetermined time has elapsed after the hulling operation has started.

There is also a known device in which the adjustment of the roll gap is controlled by the load current of a roll drive motor, and this device utilizes the fact that the load current of the motor changes depending on the pressurized state of the rolls. This device had a defect in that highly accurate control could not be performed smoothly because the reference for the motor load current was set to the load current value at the average efficiency of the entire hulling device.

Therefore, if a control device for the dehulling rate sensor is used in combination with a control device for measuring the load current of the motor, it is possible to adjust the roll gap to operate satisfactorily from the start to the end of the hulling operation.

Therefore, in the present invention, the roll gap is widened, the motor is energized, and the motor 2 for adjusting the roll gap is turned off immediately after the start of hulling.
The gist of the present invention is a configuration of a roll gap control method in a hulling device in which the first control is performed by detecting the load of the roll drive motor 50, and after a predetermined period of time, is performed by the dehulling rate measuring section 32.

One embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a rice hulling section, which has a supply hopper 2 at the top, an on-off valve 3 and a feeding control valve 4 at the bottom of the supply hopper 2; A pair of fixed hulling rolls 5 and a movable hulling roll 6 are provided. The rotating shaft 7 of the fixed hulling roll 5 is mounted on the case 8 of the hulling section l, and the movable hulling roll 6 is equipped with an automatic hulling roll gap adjustment device 9. The automatic gap adjustment device 9 is formed as follows. That is, the movable hulling roll 6 is pivoted by a rotating shaft 12 at an intermediate position between the upper and lower sides of a swinging arm 11 whose lower end is fixed to the case 8 by a shaft 10, and a top 13 is attached to the upper end of the swinging arm 11. Attach the screw rod 14 through it. screw rod 14
The opposite side of the piece 13 is made to protrude outward from the case 8,
A pin 1 is attached to the protrusion so as to be perpendicular to the screw rod 14.
Penetrate 5. Reference numeral 16 denotes an inner cylinder, which is formed long in the axial direction of the screw rod 14, and a manual rotation handle 17 is attached to the outer end of the inner cylinder. Several protrusions 18 are provided in the axial direction on the inner surface of the inner cylinder 16, and both ends of the pin 15 are engaged with the protrusions 18. A gear 19 is attached to the end of the inner cylinder 16, and a gear 20 meshes with the gear 19, and the gear 20 is fixed to a rotating shaft 22 of a forward/reverse motor 21 for adjusting the roll gap. The motor 21 is controlled by a control circuit 23, which will be described later.

Reference numeral 24 indicates a drop opening of the supply hopper 2, and reference numeral 25 in FIG. 2 indicates a feeding roll.

A wind selection section 26 is formed at the lower part of the hulling roll 5.6. 2
7 is a suction blower that sucks and removes dusty rice husks in the air sorting section 26; 28 is a mixed rice conveyor; 29 is an unripe rice conveyor; 3
0 is a mixed rice receiving gutter, and 31 is an unripe rice receiving gutter.

Therefore, a dehulling rate measuring section 32 is provided in the fall path of the fixed hulling roll 5.6. The structure of the wall removal rate measuring section 32 is as follows.
As shown in the figure, it consists of a pair of sensor sections 33, a sink plate 34 that sends grains to the sensor section 33, an excitation coil 35 that vibrates the sink plate 34, an absorption port 36, etc. A dissimilar grain sorting section 37 is provided on the side of the hulling section 1. Inside the dissimilar grain sorting section 37, there are countless potholes 3 on the inner peripheral surface.
8 is horizontally installed. Reference numeral 40 denotes a finished rice receiving trough provided completely in the longitudinal direction within the horizontal shaft rotating cylinder 39;
1 is a finishing rice conveyor, 42 is a finished rice take-out gutter, 43 is a finished rice take-out conveyor, 44 is a receiving gutter for the mixed rice supplied by the thrower 45 provided on the side of the mixed rice receiving gutter 30, 4
6 is a mixed rice spiral.

Thus, a plurality of packets 47 are formed on the discharge side of the horizontal rotary tube 39, and the unhulled rice that has reached the discharge side of the horizontal rotary tube 39 is fried to an upper position and formed in the supply hopper 2. It is made to flow into the chute 48. Therefore, a grain frying device is not required.

Reference numeral 49 is a rice thrower provided on the side of the finished rice take-out gutter 42.

4 to 6 show the control contents of the control circuit 23. FIG.

Next, we will discuss the effect.

The operating procedure is shown according to the control circuit 23 shown in FIG. 4. First, the on-off valve 3 is closed, unhulled rice is supplied into the supply hopper 2, and the power of the entire apparatus is turned on. Then motor 2
1 is turned on, the gap between the hulling rolls 5.6 widens, and the remaining unhulled rice stored between the hulling rolls 5.6 is removed. Next, the power of the roll drive motor 5o is turned on,
The no-load current of the hulling roll 5.6 is measured, but in this method, after measuring the load current of the roll drive motor 5°, the gap between the hulling rolls 5.6 is further widened and the load current is measured again. If these two load current values are equal, it is determined that it is a no-load current value.

After measuring the no-load current value, the motor 21 is reversed, the hulling roll 5.6 is brought into slight contact, and the on-off valve 3 is opened. Only the on-off valve 3 is operated manually. When the open/close valve 3 is confirmed to be open, the roll drive motor 50 is controlled to a preset initial operation load current to start initial operation, and at the same time, the wall removal rate measurement section 32 starts measuring the wall removal rate.

As shown in FIG. 5, the dehulling rate measuring section 32 measures each peak voltage depending on the type of brown rice, green rice, and unhulled rice, but when measuring the peak voltage of brown rice, there is still a gap between the rolls. Since it is narrow, the load current for the initial operation is changed slightly.

After the peak voltage value of unhulled rice is measured by the dehulling rate measuring section 32, the control circuit 23 is switched from control based on the load current value to control based on the measurement by the dehulling rate measuring section 32.

Therefore, the hulled material by the hulling roll 5.6 is removed by the wind selection section 26.
The rice husks are discharged from the exhaust pipe by the suction air of the suction blower 27, and the immature rice falls into the immature rice receiving trough 31 and is taken out by the immature rice conveyor 29. The mixed rice falls into the mixed rice receiving trough 30, is taken out by the mixed rice conveyor 28, is fried by the thrower 45, is supplied to the mixed rice receiving trough 44, is transferred by the mixed rice spiral 46, and is transferred to the horizontal shaft rotating cylinder 39. The brown rice is pulled up through the pot hole 38 and taken out to the finished rice receiving trough 40, transferred to the discharge side by the finished rice conveyor 41, falls into the finished rice taking out trough 42, and is taken out by the finished rice taking out conveyor 4.
The finished rice is transported laterally at step 3 and taken out at the thrower 49.

After the unhulled rice remaining in the horizontal shaft rotating cylinder 39 is moved in the same way,
It is scooped up by a packet 47 formed on the discharge side of the horizontal shaft rotating cylinder 39 and falls into the chute 48, and is transferred to the supply hopper 2.
is returned to the factory and reprocessed.

As described above, the present invention widens the roll gap, energizes the motor, and immediately after the start of hulling, the motor 21 for adjusting the roll gap is controlled by detecting the load on the roll drive motor 50, and after a predetermined period of time, the motor 21 is controlled by detecting the load on the roll drive motor 50. Since the method of controlling the roll gap in the hulling device is carried out by the dehulling rate measuring section 32, the motor must be Since automatic control is performed by load detection, it is possible to consistently control the roll gap from the start to the end of the work.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view of the entire structure, Fig. 2 is a longitudinal side view of the main parts, Fig. 3 is a longitudinal side view of the main parts, Fig. 4 is a flowchart of the control circuit, and Fig. 5 is a diagram of the demolition rate sensor. The output diagram and FIG. 6 are circuit diagrams of the control circuit.1 Explanation of symbols l... Hulling section, 2... Supply hopper, 3... Opening/closing valve, 4... Feeding control valve, 5 ...Fixed hulling roll, 6
...Moving rice hulling roll, 7... Rotating shaft, 8... Case, 9... Automatic gap adjustment device, 10... Shaft, 11...
... Swinging arm, 12... Rotation axis, 13... Top, 14
... screw rod, 15 ... pin, 16 ... inner cylinder, 17.
...Manual rotating handle, 18...Protrusion, 19...Gear, 20...Gear, 21...Forward and reverse rotation motor, +2
2... Rotating shaft, 23... Control circuit, 24... Dropping port, 25... Feeding roll, 26... Wind selection section, 27...
...Suction blower, 28...Mixed rice conveyor, 29.
...Immature rice conveyor, 30...Mixed rice catcher, 31...
- Immature rice receiving trough, 32... De-hulling rate measurement section, 33... Sensor section, 34... Sink plate, 352... Vibration coil, 36... Absorption port, 37... Different type Grain sorting section, 38... pot hole, 39... horizontal shaft rotating cylinder, 4
0... Serving rice catcher, 41... Serving rice conveyor,
42... Finished rice removal gutter, 43... Ice removal conveyor, 44... Mixed rice receiving gutter, 45... Thrower 1'
46...Mixed rice spiral, 47...Packet, 48...
・Shoot, 49...Shi" - Rice thrower, 50...
Roll drive motor patent applicant: 2 people other than Iseki Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] The roll gap is widened and the motor is energized. Immediately after the start of hulling, the motor 21 for adjusting the roll gap is controlled by detecting the load on the roll drive motor 50. After a predetermined period of time, the dehulling rate measurement unit 32 controls the roll gap adjustment motor 21. A roll gap control method in a rice hulling device.