JPH07236832A - Hulling roll gap control device - Google Patents

Abstract

PURPOSE:To prevent surface damage to grains at the time of high atmospheric temp. summer. CONSTITUTION:This hulling roll gap control device has a measuring means measuring the atmospheric temp. in the vicinity of a huller or the temp. of grain to be hulled and a regulation means regulating the gap between hulling rolls 3, 4 and also has a means preliminarily storing the relation between atmospheric temp. or grain temp. and a tolerance limit dehulling rate or the tolerance limit gap between the hulling rolls 3, 4. A control part 19 outputting a gap control command signal to the regulation means on the basis of the measured result of the measuring means so as to meet with the relation is provided to set a hulling roll gap or a dehulling rate matched with a hulling state or environment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hulling roll gap control device.

[0002]

2. Description of the Related Art Conventionally, the clearance control of a hulling roll is usually carried out to correct the deviation between the depaction rate value input in advance and the depuff rate value detected by the removal rate sensor.

[0003]

However, when the removal rate value is unduly increased, so-called skin-developed rice which causes damage to the surface of brown rice occurs. The operator adjusts the set removal rate to a state where there is no skin deviation while monitoring this occurrence, but skin deviation that is difficult to visually determine cannot be easily dealt with, and problems such as deterioration after storage remain.

[0004]

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned drawbacks, and a measuring means for measuring the outside air temperature near the hulling machine or the temperature of the grain to be hulled and the hulling rolls 3, 4 It has an adjusting means for adjusting the gap wide and narrow, and has an outside air temperature or a grain temperature and an allowable limit depulling rate or a hulling roll 3,
The control unit 19 has means for preliminarily storing the relationship with the allowable limit gap of No. 4 and outputs a wide / narrow command signal to the adjusting means so as to follow the relationship based on the measurement result by the measuring means.
And a paddy roll gap control device.

[0005]

[Advantageous effects of the invention] When the grain temperature or the outside air temperature, which is a problem as a cause of skin irritation, is high, the bran portion of the surface layer of brown rice is very likely to be damaged. Nevertheless, it is difficult to visually judge the skin irritation. There was a tendency to hull under a high removal rate, but with the above configuration it is possible to set a relatively low removal rate when the outside air temperature is high, and to control the skin even in the summer. It is possible to finish brown rice with little deviation. In addition, by similarly controlling the influence of the water content, high quality brown rice can be finished.

The same effect can be obtained by directly setting the gap between the hulling rolls in addition to the allowable decapsulation rate value.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a removing unit of the hulling machine, and a pair of left and right hulling rolls 3 and 4 are provided below the hopper 2. Of these rolls, the roll 3 pivotally supported on the main shaft 5 is supported by the machine frame in a fixed state of the shaft 5, and the other is pivotally supported by a sub shaft 7 whose position can be changed by a link 6. The link 6 has a structure that can be swung by forward and reverse rotation of the screw shaft 8, and is linked with a control motor 9 and an adjustment dial 10 that can rotate forward and backward at the end.

Below the removing unit 1, a wind selecting unit 11 is constructed. The suction fan 12 is rotated to remove rice husks, husks, and the like from the rice that has flowed down the sorting shelf, and the rice is collected in the mixed rice transfer spiral gutter 13. Reference numeral 14 is a dust collecting cylinder, and 15 is a drainage gutter. An elevator 16 is connected to the transfer end of the mixed rice transfer spiral gutter 13 and the hopper of the mixed rice sorting section 17 is seen below the outlet side thereof. There are various known forms of the mixed rice sorting unit, and any of them may be adopted. 18 is an elevator for finishing rice.

Reference numeral 19 denotes a control unit, which is a start / stop switch 2
In addition to outputting a drive signal and a stop signal to the drive motor 22 which receives 0, 21 inputs and activates each part, a pull-out rate setting dial 23 signal can be input, and a detection output of the take-off rate sensor 24 is received to output the signal. This is a configuration for outputting a command signal for forward rotation or reverse rotation to the control motor 9. The removal rate sensor 24 is configured to branch the path from the mixed rice transfer spiral gutter 13 to the elevator 16 to take in the mixed rice sample, and the sample is made to flow down the inclined guide chute 25 for each grain. The optical sensor 26 arranged corresponding to the lower end portion of the chute 25 is configured to detect the transmittance of the grain and transmit it to the control unit 19. The control unit 19 determines whether the unpolished rice is paddy or not based on whether or not the amount of transmitted light is a predetermined reference, and can calculate the removal rate for each predetermined number of grains. The control motor 9 is rotated forward / reversely or stopped / maintained while comparing the calculated removal rate with the removal rate set by the setting dial 23.

Further, the control unit 19 has an outside air temperature sensor 27,
Also, the information from the moisture meter 28 provided in the hopper 2 is configured to be input. By the way, the level of the grain temperature (the grain temperature adapts to the ambient temperature, so the grain temperature ≈ ambient temperature) is closely related to the brown rice hardness (Fig. 2), and this relationship is high and low. Therefore, there is a proportional relationship (the same figure). Therefore, the control unit 19 stores the outside air temperature T _A and the allowable desorption rate value D _L (the upper limit desorption rate value set by the setting dial 23) for each moisture value M _N (FIG. 3).

Reference numeral 29 is an automatic removal rate setting switch for automatically setting the removal rate. The control unit 19 mainly has the following functions. That is, the automatic removal rate setting switch 29 O
When inputting the presence or absence of N signal and inputting ON, the detection signals from the outside air temperature sensor 27 and the moisture meter 28 are input,
Select acceptable husking rate value D _L in the conditions of pre-stored permissible husking rate value D _L line, after operation start outputting enter the transmission signal of each grain of the husking rate sensor 24, Discrimination between unhulled rice and brown rice is carried out to calculate a removal rate value D. The calculated removal rate D is compared with the allowable removal rate value D _L , and when the calculated removal rate D is higher than that, a predetermined rotation number reverse rotation signal is output to the control motor 9 to output the hulling rolls 3, 4 It is output to increase the interval, and when it is low, the normal signal is also output.

In addition, the above-mentioned automatic removal rate setting switch 29 is used.
When is OFF, the control motor 9 outputs a forward / reverse rotation command based on the setting contents of the setting dial 23.
The set removal rate value D _{S of the} setting dial 23 is compared with the allowable removal rate value D _L determined from the outside air temperature and the moisture value,
If the set removal rate value D _S is less than or equal to the allowable removal rate value D _L , work can be started, but in the opposite case, an alarm signal is output and that effect is displayed on the display unit 30 to prompt a change in setting. Is.

The operation of the above example will be described. When the removal operation is started, when the automatic removal rate setting switch 29 is turned on and the activation switch 20 is turned on, the control unit 19 receives detection information from the outside air temperature sensor 27 and the moisture meter 28 and is stored in the storage unit. The allowable removal rate value D _L is read.
Further, a part of the mixed rice of unhulled rice and brown rice that has actually been subjected to the degumming treatment by the operation of the huller is supplied to the shedding rate sensor 24. Here, it is determined for each grain whether it is paddy or brown rice, and the brown rice ratio with respect to all grains, that is, the removal rate is calculated. A normal rotation, a reverse rotation, or a stop maintenance command signal is output to the control motor 9 by comparing the calculated removal rate D with the allowable removal rate D _L.

In this way, the hulling roll 3, 4 gap control operation based on the allowable removal rate value D _L is executed. On the other hand, when the automatic take-off rate setting switch 29 is OFF, it is controlled by the set value D _S of the setting dial 23 set by the operator. At this time, when the set value exceeds the allowable removal rate which is determined by the outside air temperature or the moisture value, it is possible to inform the operator of the setting as an abnormal setting by the display unit 30 (or the alarm unit), and the skin can be corrected. It is possible to prevent the occurrence of displacement.

Further, the interval between the hulling rolls 3 and 4 can be set based on the setting of the adjusting dial 10 without controlling the control motor 9 from the detection signal of the removal rate sensor 24. In this case, the manual / automatic changeover switch (not shown) is used to switch to the manual side, and the output of the control signal from the control motor 9 by the removal rate sensor 24 is cut off. In the above-mentioned embodiment, the permissible depletion rate value D _L is empirically determined on the basis of the knowledge that the higher the outside air temperature, the higher the grain temperature and the more easily skin shift occurs.
If the grain temperature immediately before hulling or during grain hulling is measured and the allowable removal rate is similarly known and stored, it is possible to perform highly accurate control because it is based on the grain temperature that directly affects the skin shift. it can.

As described above, when the grain temperature or the outside air temperature, which is a problem as a cause of skin deviation, is high, the bran portion of the surface layer of brown rice is very likely to be damaged. Although there was a tendency to hull under the removal rate, it is possible to set a relatively low removal rate when the outside air temperature is high by the above configuration, and to control the skin even in the summer. It can be used to produce brown rice with a small amount. In addition, since the influence of the moisture value is also controlled in the same manner, high quality brown rice can be finished.

When the grain dryer and the huller are connected to form a drying preparation system, the above-mentioned outside air temperature information and moisture information are naturally provided on the grain dryer side as data of an outside air temperature sensor and a moisture meter. By adopting a form in which can input, it is convenient without requiring separate sensors. Further, it is effective that the variation of water content can be input. For example, the water content variation can be calculated by the standard deviation, and n times (for example, 1.5 times) of the standard value can be added to the average value to be used as the virtual water content value as the water content value of the allowable dewatering rate value.

The following functions are added to the removal rate sensor 24 to correct the set removal rate value D _S (allowable removal rate value D _L when the automatic removal rate setting switch 29 is ON) to improve accuracy. Can be increased. That is, the control unit 19 calculates and calculates the grain thickness of brown rice based on the information from the optical sensor 26 provided at the end of the chute 25, and calculates the variation from the grain thickness distribution of a predetermined grain number. Therefore, the dehulling rate value is determined according to the grain thickness, and the hull roll gap is controlled based on the value, or the relationship between the grain thickness variation and the set dehulling rate value correction amount as shown in FIG. 4, for example. Is stored and the hulling operation is continued while performing a correction process according to the above variation. Therefore, the variation in the thickness of the rice grain may increase depending on the climatic conditions, the ripening condition due to fertilization management, etc.
In that case, skin deviation may occur, but the gap of the hulling roll is controlled according to the degree of variation by automatically measuring the variation in grain thickness of the unpolished rice after decapsulation,
Since the rice hulling work is carried out reasonably, it becomes a high quality brown rice.

[Brief description of drawings]

FIG. 1 is a schematic explanatory diagram of an apparatus.

FIG. 2 is a graph of grain temperature-brown rice hardness relationship.

FIG. 3 is a graph showing the relationship between the outside air temperature and the set removal rate.

FIG. 4 is a graph showing the relationship between the variation in grain thickness and the correction amount for the set removal rate.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Detaching part, 2 ... Hopper, 3, 4 ... Hulling roll, 5 ... Main shaft, 6 ... Link, 7 ... Sub shaft, 8 ... Screw shaft, 9 ... Control motor, 10 ... Adjustment dial, 11 ... Wind selection Department, 12 ...
Suction fan, 13 ... Mixed rice transfer spiral gutter, 14 ... Dust collector,
15: ladle transfer gutter, 16 ... elevator, 17 ... mixed rice sorting section,
18 ... Elevator for finishing rice, 19 ... Control part, 20 ... Start switch, 21 ... Stop switch, 22 ... Drive motor, 23 ...
Setting dial, 24 ... Take-off rate sensor, 25 ... Shoot,
26 ... Optical sensor, 27 ... Outside air temperature sensor, 28 ... Moisture meter, 29 ... Automatic removal rate setting switch, 30 ... Display section

Claims (1)

[Claims] 1. An outside air temperature or a grain having a measuring means for measuring an outside air temperature in the vicinity of a hulling machine or a grain temperature for hulling, and an adjusting means for widely adjusting the gap between the hulling rolls 3, 4 It has a means for storing in advance the relationship between the temperature and the allowable limit depletion rate or the allowable limit gap of the hulling rolls 3, 4, and the adjustment means is configured to be wide or narrow so as to comply with the relationship based on the measurement result by the measuring means. A hulling roll gap control device provided with a control unit 19 that outputs a command signal.