JP3664324B2 - Dehiding difficulty discrimination device for hullers - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a rice huller that moves the position of one of the detachment roll shafts by a motor that can be rotated in forward and reverse directions to adjust the gap between the detachment rolls in a wide and narrow manner. Determines the degree of difficulty of removing without measuring the component values, and if it is difficult to remove, informs the operator of this and prevents the occurrence of misaligned rice and broken rice due to excessive closure of the removal roll. The present invention relates to a removal difficulty level discriminating apparatus in a huller.
[0002]
[Prior art]
Conventionally, the level of one of the detaching roll shafts is detected so that the smashed rice deflated by a pair of detaching rolls is detected by a detaching rate sensor, and the detected detaching rate becomes a preset target detaching rate. Japanese Patent Application Laid-Open No. 64-80451 discloses a hulling machine in which the gap between the two detaching rolls is adjusted to be wide and narrow by moving the motor with a reversible motor. This hulling machine is a dehulling rate control device using so-called feedback control for opening and closing both dehulling rolls so that the detected dehulling rate becomes the preset target dehulling rate, The purpose is to improve the responsiveness when the detected removal rate of sliding rice is far from the preset target removal rate.
[0003]
In the detachment rate control apparatus as described above, when the detected detachment rate of the sliding rice does not reach the preset target detachment rate, the motor that can be rotated forward and backward reduces the gap between the two detachment rolls, Routine control is automatically repeated so as to increase the removal rate of the rice and approach the target removal rate. However, even if the gap between the pair of detaching rolls is narrowed to some extent, the detachment rate of the sliding rice may not be improved (see the arrow in FIG. 5). Decrease in the peripheral speed difference between the main roll and the sub roll (the main roll has a larger amount of wear).
[0004]
[Problems to be solved by the invention]
On the other hand, it is conceivable that the raw material waste that is difficult to remove is supplied as another reason that the removal rate does not improve. The raw material koji supplied to a pair of de-rolling rolls is difficult to de-pour due to differences in koji varieties, moisture or elapsed time after completion of drying, etc. May not improve. As a result, there has been a drawback that the gap between the derolling rolls is made too narrow to cause skin misalignment and broken rice.
[0005]
By the way, in Japanese Examined Patent Publication No. 62-47414, “It has been found that the removal rate of the hulling machine varies depending on the variety of hulls and the degree of difficulty of removal depending on the moisture content, in addition to the motor load current and the roll gap. However, no means for specifically determining the degree of removal difficulty is disclosed.
[0006]
In view of the above-mentioned problems, the present invention determines the difficulty of removing without measuring component values such as varieties and moisture of the straw supplied to the hulling machine, and if this is difficult to remove, It is a technical problem to provide a device for determining the degree of difficulty of removing in a rice huller that prevents generation of misaligned rice and broken rice due to excessive closing of the removal roll.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention sets in advance a dehulling rate sensor for detecting the dehulling rate of the crushed rice defatted by a pair of dehulling rolls, and a detection dehulling rate detected by the dehulling rate sensor. Roll gap control means for opening and closing the gap of the detachment roll so as to achieve the target detachment rate, and from the start of control of the roll gap by the roll gap control means until the detected detachment rate reaches the target detachment rate Measuring time and comparing the measurement time with a reference time to determine the degree of difficulty in removing the raw material soot, and the degree of difficulty in determining the degree of removal is determined by the degree of difficulty in determining the degree of removal. In such a case, the technical means of setting and changing the target removal rate and providing a display / control means for displaying an alarm is taken.
[0008]
In addition, a raw material supply valve that adjusts the supply amount of the raw material slag supplied to the pair of detachment rolls, and an opening degree detection sensor that detects the opening degree of the raw material supply valve, The raw material supply amount may be calculated from the detection value of the opening degree detection sensor, and the operation may be started when it is detected that the raw material supply amount to the detaching roll is constant.
[0009]
[Action]
When the palletizing operation is started with a pair of detachment rolls, the detachment rate of the crushed rice after detachment is detected by the detachment rate sensor, and this detected value is input to the detachment difficulty level determination means. In the detachment difficulty level determining means, the opening and closing of the roll is controlled so that the detected detachment rate detected by the detachment rate sensor becomes a preset target detachment rate. Then, the time from the start of control of the roll gap until the detected detachment rate reaches the target detachment rate is measured, and the measurement time is compared with the reference time to determine the difficulty level of the raw material mash. The When it is determined that the raw material cocoon is a cocoon that is difficult to be deflated, the display / control means changes the setting so that the target deflation rate is lowered, and an alarm is displayed to indicate that defusing is difficult.
[0010]
Further, when the opening degree of the raw material supply valve is detected by the opening degree detection sensor, this detected value is input to the detachment difficulty determining means together with the detection value of the detachment rate sensor. The raw material supply amount to the detaching roll is calculated by the detachment difficulty determining means, and the stable detachment difficulty level without error is determined while monitoring that the raw material supply amount is constant.
[0011]
【Example】
Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. In FIG. 1, the hull sorter 1 includes a box-shaped machine frame 2 which is long horizontally, a hull portion 3 provided in the upper right portion of the machine frame 2, and a plurality of sorting provided in the upper left portion of the machine frame 2. The whole is composed of a swinging sorter 4 made of a plate.
[0012]
The hulling part 3 is provided with a feed roll 7 and a supply valve 8 facing the hull supply port 6 at the bottom of the raw hull hopper 5 and facing the lower side, and two parallel hulling release rolls for hulling. 9 and 10 are placed across the gap S. Then, the shaft 9A of one roll 9 is supported on the machine wall, and the shaft 10A of the other roll 10 is supported by an adjustment rod 11 that can turn left and right.
[0013]
Then, the screw part at the tip is threaded through the adjusting rod 11 through a motor M that rotates forward or reversely with a built-in reduction gear, thereby constituting a roll gap control means.
[0014]
Reference numeral 12 denotes a shutter that opens and closes the basket supply port 6. Then, the rolls 9 and 10 are rotated inward by the main motor 13, and the hull supplied to the hopper 5 is hulled by friction between both rolls.
[0015]
In the next step of the hulling portion 3, a wind selection mechanism is provided which includes a diaphragm 14 provided below the hulling portion 3 and a dust exhaust fan 15 provided on the upper left side of the hulling portion 3. Then, the mixed rice of rice bran and brown rice that has passed through the wind sorting mechanism communicates with the screw conveyor 16 and the screw conveyor 16 installed horizontally in the lower center of the machine frame 2 and the bucket conveyor installed upright in the machine frame 2 center. 17 to the mixed rice tank 18. The mixed rice staying in the mixed rice tank 18 is supplied to the rocking and sorting unit 4 and sorted into three types of brown rice, rice bran, and mixed rice. Is discharged out of the machine. The rice cake that has passed through the oscillating sorting section 4 is sent to the rice huller section 3 by a circulating cocoon (not shown) to perform the rice hulling and wind selection, and the mixed rice that has passed through the oscillating sorting section 4 is further circulated. It is sent to the screw conveyor 16 and the bucket elevator 17 through a ridge (not shown), supplied to the mixed rice tank 18, and sorted again by the swing sorting unit 4.
[0016]
In the present embodiment, the rice hull portion is devised so that a stable detachment difficulty can be determined without error even in the initial stage of operation when the raw material supply amount to the rice hull sorter 1 and the circulation amount of the rice are unstable. The third supply valve 8 is provided with an opening degree detection sensor 20 so that the amount of raw material supplied to the detaching rolls 9 and 10 can be detected. In addition, a detachment rate sensor 21 that detects the detachment rate of the crushed rice after detachment is provided at an arbitrary position between the hulling portion 3 and the swing sorting portion 4. In this embodiment, as shown in FIG. 2, the upper end of the sampling pipe 22 faces the mixed rice tank 18, and the lower end of the sampling pipe 22 is connected to the removal rate sensor 21. With this configuration, the degreasing rate of the mixed rice collected in the mixed rice tank 18 is measured, and the mixed rice whose measurement of the degreasing rate has been completed is returned to the bucket elevator 17. Reference numeral 25 denotes a mixed rice bran that communicates the diaphragm 14 and the screw conveyor 16, and reference numeral 26 denotes a main switch 27, a dial 28 that sets a target removal rate, a display 24 that displays the removal difficulty level, and the like. It is a control panel provided with.
[0017]
The control part of the said opening degree detection sensor 20 and the removal rate sensor 21 is demonstrated referring FIG. FIG. 3 is a block diagram showing a detachment difficulty level determination device. The opening degree detection sensor 20 and the detachment rate sensor 21 are connected to a detachment difficulty level determination unit 23, and the detachment difficulty level determination unit 23 The raw material supply amount is calculated, and the motor M is driven to control the opening and closing of the gap S between the two detachment rolls so that the detected detachment rate becomes a preset target detachment rate. The time taken to reach the target detachment rate is measured to determine the degree of difficulty in removing the raw material candy. The removal difficulty determining means 23 is connected to the display / control means 24. When it is determined that removal is difficult, the setting change is made in a direction to lower the target removal rate and an alarm is displayed.
[0018]
Next, the operation of the above configuration will be described with reference to the flowcharts of FIGS. By supplying the raw material mash from the hopper 5 and opening the shutter 12, the raw material mash is supplied from the candy supply port 6 to the detaching rolls 9 and 10. At this time, the soot supply valve 8 is in a half-open state, and the opening degree detection sensor 20 detects the opening degree of the soot supply valve 8. The raw rice cake is deflated by the detaching rolls 9 and 10, and the ground rice from the detaching rolls 9 and 10 falls on the diaphragm 14 and is sieved into mixed rice and rice husks. Then, the rice husk is discharged out of the machine by the suction air of the dust exhaust fan 15, and the mixed rice is supplied to the screw conveyor 16 through the mixed rice bran 25, and is conveyed to the screw conveyor 16 and the bucket elevator 17 to be mixed rice tank. 18 is supplied. The mixed rice supplied to the mixed rice tank 18 is supplied to the rocking and sorting unit 4 to be sorted into three types, rice bran, brown rice, and mixed rice, and some of the mixed rice supplied to the mixed rice tank 18 is The degreasing rate of the mixed rice is measured by being supplied to the dehulling rate sensor 21 via the sampling pipe 22.
[0019]
The detection signals of the opening degree detection sensor 20 and the detachment rate sensor 21 are input to the detachment rate difficulty determining means 23, and the detachment difficulty determining means 23 controls the detaching rolls 9 and 10, and the detachment difficulty level. And the target removal rate is changed. This will be described in detail according to the flowchart of FIG.
[0020]
In step 101, the opening amount detection sensor 20 calculates the supply amount of soot to the detaching rolls 9 and 10, and determines whether or not the supply amount is constant. Then, the process proceeds to step 102 only when it is constant. In step 102, the target removal rate inputted by the operator is read and stored by the removal rate setting dial 28, and the detected removal rate detected by the removal rate sensor 21 is read at regular time intervals. In step 103, the target desorption rate is compared with the detected desorption rate, and if the detected desorption rate is equal to the target desorption rate, the process returns to step 101, and the detected desorption rate must be equal to the target desorption rate. Step 103 is reached. In the next step 104, a routine for determining the degree of removal difficulty starts, and a timer for measuring the target removal rate response time (t) is activated. When the timer is activated in step 104, the gap S between the removing rolls 9 and 10 is controlled in the next step 105.
[0021]
The gap control of the detaching rolls 9 and 10 in this step 105 is performed to narrow the roll gap S so that the detected detaching rate approaches the target detaching rate as soon as possible. In this control, for example, the control amount of the motor M is determined on the basis of an experimental value “if the roll gap S is reduced by 0.1 mm, the removal rate increases by 1%”.
[0022]
Next, the routine proceeds to step 106, where the target removal rate and the detected removal rate are read again. At this time, the detected removal rate is updated to the latest detection value after the roll gap S is changed, but the target removal rate is not updated unless the removal rate setting dial 28 is changed.
[0023]
Further, in step 107, the target removal rate and the detected removal rate are compared again. If the detected removal rate is equal to the target removal rate, the process returns to step 105, and if the detected removal rate is not equal to the target removal rate. Step 108 is reached. In step 108, the timer that started the measurement in step 104 is stopped, and in next step 109, a target removal rate response time (t) at which the detected removal rate approaches the target removal rate is calculated. In step 110, it is determined whether the response time (t) exceeds a preset reference time. If the response time (t) does not exceed the reference time, it is determined that “raw material cake that is easy to remove” is supplied. When the response time (t) exceeds the reference time, it is determined that “raw material cake that is difficult to remove” is supplied, and the target removal rate changing means in step 111 and the removal difficulty display in step 112 are displayed. It reaches.
[0024]
Step 111 is a means for changing the target removal rate. For example, the operator sets the target removal rate to 90% using the removal rate setting dial 28, and the detected removal rate is 90% even if the reference time is exceeded. When the value does not reach, the target desorption rate is automatically changed (for example, 85%) and the desorption rate is controlled again.
[0025]
When the setting of the target removal rate is changed, step 112 is reached, the operator is informed by the indicator 24 that the raw material is difficult to be removed, and the target removal rate is changed. To inform.
[0026]
As described above, when the raw material mash is supplied to the hulling sorter 1, the adjustment of the gap S between the detaching rolls 9 and 10 is automatically performed until the target detachment rate set by the detachment rate setting dial 28 is approached. However, if the detected removal rate does not approach the target removal rate even after the reference time is exceeded, the raw material waste is displayed as “raw material waste that is difficult to remove” and the target removal rate is changed. Since the raw rice bran is removed again, it is possible to notify the worker that the raw rice cake is difficult to remove and to prevent the occurrence of misaligned rice and broken rice due to excessive tightening of the removal roll. It became.
[0027]
【The invention's effect】
As described above, according to the present invention, the dehulling rate sensor for detecting the dehulling rate of the crushed rice defatted by the pair of dehulling rolls, and the detected dehulling rate detected by the dehulling rate sensor in advance. Roll gap control means for opening and closing the gap of the detachment roll so as to achieve the set target detachment ratio, and the detected detachment ratio reaches the target detachment ratio from the start of control of the roll gap by the roll gap control means. Measuring time and comparing the measurement time with a reference time to determine the degree of difficulty of removing the raw material soot, and determining that the removal is difficult by the means of determining the difficulty of removing the raw material In this case, the target desorption rate is changed and the display / control means for displaying an alarm is provided, so that the operator knows that the raw material is difficult to be removed. Of skin misalignment and broken rice due to excessive tightening of rice It has become possible to prevent. In the so-called fully automatic hulling machine, the cause of not reaching the target removal rate tends to be determined to be mechanical. Furthermore, generation | occurrence | production of the skin misalignment rice and the crushed rice by using the abrasion roll which was worn can be prevented. Further, even a person who is not skilled in the hulling technique does not damage the fine product, so that the hulling work can be performed with peace of mind.
[0028]
In addition, a raw material supply valve that adjusts the supply amount of the raw material slag supplied to the pair of detachment rolls, and an opening degree detection sensor that detects the opening degree of the raw material supply valve, In addition, the raw material supply amount is calculated from the detection value of the opening detection sensor, and the operation is started when it is detected that the raw material supply amount to the removal roller is constant. The amount of raw material supplied is calculated and the degree of difficulty of detachment is determined while monitoring that the amount of raw material supplied is constant. Even in the initial stage of operation, there is no error, and it is now possible to determine a stable degree of removal.
[Brief description of the drawings]
FIG. 1 is a partially broken side view showing a hulling machine according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a huller equipped with a removal rate sensor.
FIG. 3 is a block diagram showing a removal difficulty level discriminating apparatus according to an embodiment of the present invention.
FIG. 4 is a flowchart of the above.
FIG. 5 is a characteristic diagram showing the relationship between the gap of the detachment roll and the detachment rate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hulling sorter 2 Machine frame 3 Hulling part 4 Oscillating sorting part 5 Raw material dredging hopper 6 Grain supply port 7 Feeding roll 8 Feeding valve 9 Release roll 9A Roll shaft 10 Deloading roll 10A Roll shaft 11 Adjustment rod 12 Shutter 13 Main motor 14 Diaphragm 15 Dust exhaust fan 16 Screw conveyor 17 Bucket conveyor 18 Mixed rice tank 19 Brown rice slot 20 Opening detection sensor 21 Decomposition rate sensor 22 Sampling pipe 23 Decomposition difficulty determination means 24 Display control means 25 Mixed rice樋 26 Control panel 27 Main switch 28 Removal rate setting dial M Motor

Claims (2)

A detachment rate sensor that detects the detachment rate of the crushed rice deflated by the pair of detachment rolls, and the detachment rate so that the detected detachment rate detected by the detachment rate sensor becomes a preset target detachment rate. Roll gap control means for opening and closing the roll gap, and measuring the time from the start of control of the roll gap by the roll gap control means until the detected removal rate reaches the target release rate, and the measurement time Degreasing difficulty determining means for comparing the reference time to determine the degree of detachment difficulty of the raw material slag, and when the detachment difficulty determining means determines that detaching is difficult, the target detachment rate is determined. An apparatus for determining the degree of difficulty of removal in a hulling machine, characterized by comprising a display / control means for changing settings and displaying an alarm. A raw material supply valve that adjusts the supply amount of the raw material slag supplied to the pair of detachment rolls, and an opening degree detection sensor that detects an opening degree of the raw material supply valve, 2. The bag according to claim 1, wherein the operation is started when the raw material supply amount is calculated from the detection value of the opening detection sensor and when it is detected that the raw material supply amount to the detaching roll is constant. Deletion difficulty determination device for a sliding machine.

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