JPH0622691B2 - Roll gap changing device for huller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to an improvement of a removal rate control device for a huller.

(Prior Art) Conventionally, as a device of this type, light is applied to each grain of the mixed rice after the depulling process with a deploping roll, and an electrical output corresponding to the amount of transmitted or reflected light is removed. In addition to obtaining it from the sensor for detecting the rate of pudding, the electrical output is compared with the discriminating value of unhulled rice / brown rice that is set in advance to distinguish between unhulled rice and brown rice, and the removal rate is calculated from the result of the comparison. There is known a device in which the clearance of the removing roll is adjusted so that the obtained removing ratio matches the set removing ratio.

(Problems to be Solved by the Invention) By the way, there are a plurality of types of cereal varieties to be subjected to degumming treatment, in addition to nonglutinous rice and glutinous rice, and it has not been possible to discriminate and judge these in the past.

On the other hand, when the grain variety to be removed is different, the reflectance and the properties of the grain surface are also different. Therefore, when the sensor for detecting the removal rate is optical as described above, it was calculated based on the output. It turned out that the accuracy of the removal rate was poor.

Therefore, it is not appropriate to uniformly adjust the gap of the removing roll based on the removing rate calculated from the optical data as described above without taking into consideration the difference in grain variety. Improvement was desired.

Therefore, an object of the present invention is to make it possible to appropriately adjust the gap of the removing roll according to the grain type.

(Means for Solving Problems) In order to achieve the above object, the present invention is configured as follows.

That is, the present invention relates to a dep roll for removing grain, a sensor for detecting a dep rate for optically detecting a dep rate of mixed rice after the dep roll with the dep roll, and the dep roll. A load current detection sensor that detects the load current of the roll motor that drives the roll, and a demounting roller that adjusts the gap of the depulling roll so that the detected deplacing rate of the depating rate detection sensor matches the set deprating rate. A rate control means, a load control means for adjusting the interval of the removing roll so that the detection value of the load current detection sensor matches a set value, and either the removing rate control means or the load control means The roll gap adjusting control by one is provided with a control selecting unit for selecting the grain type according to the grain type.

(Operation) In the present invention having such a configuration, when the grain to be desquamated is, for example, non-glutinous rice, the accuracy of the desquamation rate detected by the sensor for detecting the desquamation rate is good and the desquamation rate can be accurately controlled. The control selection means selects the control by the removal rate control means. As a result, the removal rate control means adjusts the gap of the removal roll so that the removal rate detected by the removal rate detection sensor matches the set removal rate.

On the other hand, when the grain to be despunned is, for example, glutinous rice, and the accuracy of the desquamation rate detected by the sensor for detecting the desquamation rate is poor and proper desquamation rate control cannot be performed, the load selection means is controlled by the load control means by the control selection means. The control is selected. As a result, the load control means adjusts the gap of the removing roll so that the detection value of the load current detection sensor matches the set value.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a block diagram of an embodiment of the present invention. In FIG. 2, reference numeral 1 is a one-chip type microcomputer, which includes a central processing unit (CPU), a random access memory (RAM), and a read only memory ( ROM). The RAM stores various data, and the ROM stores a control procedure for controlling each component as shown in FIG. 4, for example.

Reference numeral 2 denotes a load current detection sensor that detects a load current supplied to the removing roll motor 4 that drives the removing roll 3.
As the load current detection sensor 2, for example, an instrument current transformer (CT) or the like is used.

Reference numeral 5 is a sensor for detecting the removal rate, and as shown in FIG. 3, a light emitting diode 51 which is a light emitting element and a phototransistor 52 which is a light receiving element are arranged to face each other. Then, a grain supply mechanism 53 for aligning and supplying grains (samples) that have been subjected to the depletion treatment by the depletion roll 3 to the depletion rate detecting sensor 5 is connected. This grain supply mechanism 53
It comprises a vibrating plate 54 and an electromagnet 55 which vibrates the vibrating plate 54 intermittently.

An input setter 6 is provided with a dial or the like for setting a reference take-off rate in the take-off rate control as described later.
The input setting device 6 and the like are connected to the microcomputer 1 via the input interface 7.

Reference numeral 8 denotes an output interface, to the output side of which, in addition to the removing roll motor 4, a removing roll gap adjusting motor 9 that rotates in the normal and reverse directions to adjust the clearance of the removing roll 3 is connected.

Next, an operation example of the embodiment configured as described above will be described with reference to FIG.

Now, when the grain removing process is started by the removing roll 3,
The degummed mixed rice of brown rice and brown rice is guided to the degumming rate detection sensor 5 one by one by the grain supply mechanism 53,
From the sensor 5, an output voltage according to the unloaded state as shown in FIG. 5 is obtained (step S1). Where a in the figure
Is a voltage corresponding to non-glutinous rice, b is a voltage corresponding to non-glutinous brown rice, and c is a voltage corresponding to non-glutinous brown rice.

By the way, the voltage corresponding to brown rice of glutinous rice shown in FIG. 5c is concentrated in a predetermined range x such as 5V to 7V. Therefore, if the output voltage of the sensor 5 is within the predetermined range x, it can be seen that the grain that is currently undergoing the removal rate is glutinous rice.

Therefore, it is determined whether or not the output voltage of the sensor 5 is within the predetermined range x (step S2), and when it is within the predetermined range, the fact is counted (step S3), and a series of these processes is performed for a predetermined time. .

When a predetermined time has elapsed (step S4), it is determined whether or not the number of output values within the predetermined range x is a predetermined number or more, that is, whether or not the above-mentioned count value is a predetermined value or more (step S5). Occasionally, it is determined that the grain undergoing the depulling process is glutinous rice and load control is started (step S6). During this load control, the load current detection sensor 2 removes the roll motor 4
Load current is detected, and the dep roll clearance adjusting motor 9 is rotated in the normal or reverse direction to adjust the gap of the dep roll 3 so that this load current matches the set load current.

On the other hand, when the above-mentioned count value is equal to or less than the predetermined value, the grain undergoing the decapsulation process is determined to be non-glutinous rice and the decapsulation rate is controlled (step S7). During the removal rate control, the removal rate is calculated from the output voltage of the removal rate detecting sensor 5, and the removal roll gap adjusting motor 9 is set to normal so that the calculated removal rate matches the set removal rate. The gap of the removing roll 3 is adjusted by rotating or reversing.

As described above, according to the embodiment, when the grain variety to be subjected to the decapsulation treatment is, for example, non-glutinous rice, the detected decapsulation rate based on the sensor 5 for detecting the decapsulation rate is good and the decapsulation rate control can be performed accurately. The removal rate control is selected and the control is performed. On the other hand, when the grain varieties to be despunged are glutinous rice such as glutinous rice and the accuracy of the shed rate detected by the healing rate detection sensor 5 is poor and proper heap rate control cannot be performed, load control is selected. Control is performed. Therefore, in the embodiment of the present invention, it is possible to appropriately adjust the gap of the removing roll according to the grain type.

(Effects of the Invention) As described above, in the present invention, the gap of the removing roll can be adjusted by either the removing ratio control or the load control, and one of these controls can be selected according to the grain variety.

Therefore, in the present invention, when the grain to be despunned is, for example, non-glutinous rice, the dehulling rate detection sensor detects the dehulling rate with high accuracy and the dehulling rate control can be performed accurately, the dehulling rate control is selected. When the grain to be decapsulated is glutinous rice, for example, when the decapsulation rate detection sensor is not accurate and proper decapsulation rate control cannot be performed, load control can be selected. Appropriate gap adjustment of the removing roll can be performed according to the variety.

[Brief description of drawings]

FIG. 1 is a functional diagram of the present invention, FIG. 2 is a block diagram of an embodiment of the present invention, FIG. 3 is a configuration diagram of a sensor for detecting the removal rate, and FIG. 4 is a flowchart showing an operation example of the embodiment. FIG. 5 is an output waveform diagram of the sensor for detecting the removal rate. Reference numeral 1 is a microcomputer, 3 is a removing roll, 4 is a removing roll motor, 5 is a removing rate detecting sensor, and 9 is a removing roll gap adjusting motor.

Claims (1)

[Claims] 1. A dep roll for degraining grains, a dep roll detection sensor for optically detecting the dep rate of mixed rice after the dep roll, and the dep roll. And a load current detection sensor for detecting a load current of a roll motor for driving the roll motor, and a removal controller for adjusting the gap of the removal roll so that the removal rate detected by the removal rate detection sensor matches the set removal rate. Rate control means, load control means for adjusting the gap of the removing roll so that the detection value of the load current detection sensor matches a set value, one of the removing rate control means or the load control means A roll gap changing device for a hulling machine, comprising: a control selecting unit for selecting the roll gap adjusting control by the above according to the grain type.