JPH0534059B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a husking device for a hulling machine, and is intended to automatically maintain a constant husking state in a husking roll.

Problems to be Solved by the Invention In the hulling device of a rice huller, when controlling the hulling rate to maintain a constant hulling rate, it is necessary to set a hulling rate reference value that should be used as a standard for the hulling rate control. However, the paddy judgment standard of the paddy removal rate sensor that measures the phulling rate to be compared with this standard value needs to be constant, but the paddy that should be removed depends on the type of paddy itself, the degree of dryness, etc. When the judgment conditions such as the hue and brightness to be judged by the husking rate sensor change, the judgment criteria of this sensor must also be adapted to the paddy, and the adjustment operation for this is troublesome.

Means for Solving the Problems This invention detects the state of shedding by the shedding rolls 1 using a shedding rate sensor 2, and provides a gap between the shedding rolls 1 in order to keep the shedding rate constant. A hulling rate control system 4 that adjusts the husking rate control system 4 controls the husking rate after the paddy supply shutter 6 of the paddy supply funnel 5 to be supplied to the husking roll 1 is closed or when the paddy supply funnel 5 becomes empty. When restarting, a reference measuring circuit 7 is installed to control the phuting rate by measuring the paddy judgment standard that should be used as the paddy judgment standard of the phusting rate sensor 2, and during the measurement of the paddy judgment standard, the paddy judgment standard is measured. The structure of a husking device for a huller is provided with a load current control circuit 8 for adjusting the husking roll gap 3 according to the load current of the husking rolls 1.

Functions and Effects of the Invention In the dehulling roll 1 of the hulling machine, the paddy supplied to the paddy supply funnel 5 is fed down by the opening of the paddy supply shutter 6, and is subjected to the dehulling action in the gap 3. Then, the hulling rate of this hulled rice is partially detected by the hulling rate sensor 2, and the detected hulling rate is compared with a preset hulling rate reference value. and adjust the gap 3 of the deflating roll 1,
This is to control the hulling rate so that it always follows the set standard value, and during this control action, if there is no paddy in the paddy supply funnel 5 or if the supply shutter 6 is closed. , then the paddy supply funnel 5 again
By supplying paddy and opening the supply shutter 6, the dehulling action starts and the paddy judgment standard is measured by the dehulling rate sensor 2 and the reference measuring circuit 7, and new paddy is produced. Judgment criteria are set, and based on the newly set paddy judgment criteria, the phuting rate control is started based on the comparison with the already set phudding rate reference value. , at this time, while the shedding ratio sensor 2 is in the process of determining the judgment criteria, the load current control circuit 8 controls the shedding roll 1.
The gap 3 of the stripping roll 1 is automatically adjusted by detecting the load current due to stripping and comparing it with a load current value serving as a predetermined reference.

As described above, the paddy judgment criteria by the phulling rate sensor 2 is based on whether the paddy is empty in the paddy supply funnel 5 to the phusher roll 1, or when the paddy is new, such as when the paddy supply shutter 6 is closed. Since the determination is automatically redone depending on the possibility of being supplied to the supply funnel 5, the shedding rate control is performed continuously and there is no extremely large disturbance during the process. , efficient.

Embodiment In the illustrated example, the hulling machine includes a shedding device consisting of a shedding roll 1, a paddy supply funnel 5, a shedding rate control system 4, etc., and a hulling device that removes the hulled rice from this shedding device. The main components are a wind sorting device 9 that receives and wind-sorts the grains, and a sorting device 10 that receives the grains and sorts them into paddy and brown rice, and a suction dust extractor 11 is connected to the wind sorting device 9. 12 is a grain frying device for receiving the crushed rice and frying it to the sorting device 10; 13 is the sorting device 10;
This is a grain lifting machine for returning the selected paddy to the paddy supply funnel 5, and 14 is a grain lifting machine for taking out the selected brown rice.

The paddy supply funnel 5 is provided with a paddy detection sensor 15 for detecting the presence or absence of paddy in the funnel. The roll gap 3 can be adjusted under the control of the pair of left and right scraping rolls 1, 1 and the scraping ratio control system 4, and can also be adjusted manually using a dial 16. A paddy supply shutter 6 is arranged between the shredding roll 1 and the upper paddy supply funnel 5 and can be closed by a lever 17. Further, the husking rate sensor 2 is located in the wind sorting device 9 section below the husking device, and receives a part of the husked rice, detects and distinguishes between paddy and brown rice, and determines the amount of brown rice relative to the amount of husked rice. This is a configuration that allows you to find the ratio of .

The shedding rate control system 4 detects and measures the shedding rate by the shedding rate sensor 2 and compares the detected shedding rate with a standard value for the shedding rate that is selected and set in advance by the reference value setting circuit 18. Based on the comparison by the circuit 19, the control motor 20 is interlocked to adjust the movement of the shedding roll 1 to adjust the gap 3, and the shedding rate detected by the shedding rate sensor 2 is maintained at a rate that is in line with the reference value. Controls are linked as much as possible. This adjustment of the pulp removal rate is such that if the gap 3 of the plastic removal rolls 1 is made larger, the plastic removal rate will be lowered, and conversely, if the gap 3 is made smaller, the plastic removal rate can be increased. In addition, this pulp removal rate control is
It is configured such that the load on the plowing roll 1 is detected and the processing can be performed using this load current, and the reference value setting circuit 18 is configured to electrically drive the plowing roll 1 corresponding to the set plowing ratio reference value. The configuration is such that the motor load current value can also be set as a reference value at the same time. The power supply circuit of the motor for driving the skimming rotation of the skimming roll 1 is provided with a load current detection circuit 21 that detects the load current value of driving the skimming roll 1. While comparing the detected current value with the load current reference value by the reference value setting circuit 18 by the comparison circuit 22, the gap 3 is
The load current control circuit 8 is configured to be able to adjust and control.

When the supply shutter 6 is closed or the paddy detection sensor 15 detects that there is no paddy in the paddy supply funnel 5, and then the shutter 6 is opened and the paddy detection sensor 15 detects paddy, The control circuit for the shedding rate is switched from the control circuit using the shedding rate sensor 2 to the load current detection circuit 21, and the reference measuring circuit 7 for detection and judgment by the shedding rate sensor 2 can be operated. The husking rate sensor 2 is composed of a photo sensor, and is used to identify paddy and brown rice from the husked rice by the color of their surfaces. This reference measurement circuit 7 includes the paddy supply shutter 6 and the paddy detection sensor 1.
In response to the signal from 5, the peeling rate sensor 2 samples the crushed rice several times, and at each sampling time, measures the maximum voltage value of a certain number of grains, calculates the average value of these, and then The following conditions are set as the criterion for paddy judgment by this pulp removal rate sensor 2, and the detection and judgment of paddy and brown rice is performed. Upon completion of the measurement action by the reference measurement circuit 7, the control by the load current detection circuit 21 is switched back to the control by the shedding rate sensor 2 as described above.

In the hulling operation, a part of the hulled rice that is hulled by the hulling roll 1 is sampled at predetermined time intervals by a hulling rate sensor 2 to measure the hulling rate. The comparison circuit 1 compares this skipping rate with the skipping rate reference value preset by the reference value setting circuit 18.
9, the gap 3 is adjusted by the control motor 20, and the plowing ratio is controlled and maintained at a plowing ratio in line with the plowing ratio reference value.

In the middle of the hulling work or at the end of the work, the shutter 6 is closed, or once the paddy in the supply funnel 5 is gone and the paddy detection sensor 15 detects that there is no paddy, and the shutter 6 is closed again. When the paddy is opened and paddy is supplied and the paddy detection sensor 15 detects paddy, the reference measurement circuit 7 is activated and measures the voltage value of a predetermined number of grains from the sampled polished rice, and this voltage value is Select the one with the highest value, repeat this several times, average it, multiply it by the paddy judgment coefficient, etc., and obtain a voltage value above a certain level.
is set as the standard value for paddy judgment. While the reference measuring circuit 7 is performing the measurement operation, the load current detection circuit 21 is used, so the shedding rate control is based on the detection of the load current of the shredding roll 1. This load current value is compared with the shedding rate reference value preset by the reference value setting circuit 18 in the comparison circuit 22, and the control motor 20
Gap 3 control is performed.

In this way, when the determination reference value of the standard measurement circuit 7 is set, the control is switched to the pooping rate by the pooping rate sensor 2, and the phus scraping rate detected by the pooping rate sensor 2 is It is compared with the preset shedding rate reference value in a comparator circuit 19, and the gap 3 is controlled by a control motor 20. At this time, the detection of paddy by the phuting rate sensor 2 can be adapted to the judgment of paddy newly supplied to the paddy supply funnel 5 because this paddy judgment standard has been reset in the reference measurement circuit 7. Therefore, detection and measurement of the shedding rate by this shedding rate sensor 2 can be properly performed.

Note that the reference measurement circuit 7 detects the paddy in a paddy supply funnel 5 other than the phushu sensor 2, for example, and
It may be configured to obtain the paddy judgment reference value from the supplied paddy, and furthermore, it may also be used as the paddy sensor 15.

[Brief explanation of the drawing]

The figure shows one embodiment of the present invention.
The figure is a control block circuit diagram, and FIG. 2 is a side view. In the figure, numeral 1 is a husking roll, 2 is a husking rate sensor, 3 is a gap, 4 is a husking control system, 5 is a paddy supply funnel, 6 is a paddy supply shutter, 7 is a standard measurement circuit, 8
indicates the load current control circuit.

Claims (1)

[Claims] 1 A shedding rate control system 4 that detects the shedding state of the shedding rolls 1 with a shedding rate sensor 2 and adjusts the gap 3 between the shedding rolls 1 to keep the shedding rate constant.
When the paddy supply shutter 6 of the paddy supply funnel 5 to be supplied to the phushulling roll 1 closes or when phus restarts after the paddy supply funnel 5 becomes empty, the phusting rate sensor 2 is activated. A standard measuring circuit 7 is provided to control the hulling rate by measuring a paddy judgment standard that should be used as the hulling rate control standard, and during the measurement of the hulling judgment standard, the hulling roll is controlled by the load current of the hulling roll 1. 1 Load current control circuit 8 that adjusts the gap 3
A husking device for a rice huller that is equipped with a.