JPH037421B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an automatic de-rolling gap adjustment device for a huller, which is equipped with an automatic sorting adjustment device that automatically adjusts the sorting state of a sorting device to an appropriate state.

[Conventional technology] In order to perform the hulling operation with high efficiency and without damaging the brown rice in the conventional Mangoku-type rice huller, it is necessary to adjust the clearance between the rolls and dehull the rice at a dehulling ratio of 80 to 85%. In order to improve the sorting performance while maintaining this, it is necessary to maintain the flowing state of the mixed rice on the Mangoku upper screen in a state of ``7 minutes of flow and 3 minutes of stagnation'' where optimal sorting can be performed. In this state, the amount of mixed rice fed onto the Mangoku Johan net, the amount of mixed rice returned to the Mangoku funnel after sorting, or the amount of paddy returned to the paddy supply funnel are each It is stable and maintains a certain ratio.

Conventionally, in order to improve the sorting performance, it goes without saying that a sorting net with a mesh size suitable for the grain size of the mixed rice to be sorted must be selected and used. The slope of the Mangoku-jo net was adjusted according to visual judgment criteria cultivated through experience so that the flow would reach a three-minute stagnation. However, this gradient adjustment is extremely difficult to visually judge the flow state and depends on the ability of the individual operator, making it extremely difficult for inexperienced operators to accurately maintain the sorting performance in a highly efficient state.

Therefore, the applicant of the present invention previously proposed an automatic adjustment device for mangoku upper nets in rice hulling machines (for example, in the patent application filed in 1983
-41963 and the specification of Japanese Patent Application No. 57-55629). This automatically adjusts the inclination angle of the upper net so that the flowing state of the mixed rice on the Mangoku upper net is maintained at the optimum sorting condition of ``7 minutes of flow and 3 minutes of stagnation''. This makes it possible to accurately maintain sorting performance in a highly efficient state without relying on the ability of individual operators.

By the way, the removal device of a rice huller is generally formed from a pair of rubber rolls with appropriate hardness and elasticity, so as the removal time passes, the removal rolls wear out and the gap between the removal rolls decreases. becomes wider and the escape rate decreases. If the removal rate decreases, the work efficiency will decrease even if the above-mentioned automatic control device is used for efficient sorting. Therefore, during the hulling operation, it is necessary to adjust the derolling gap sequentially as the operation time progresses.

As an automatic adjustment device for the derolling gap, there is a known device that automatically adjusts the derolling gap according to the amount of paddy (hulled grains) passed through after sorting to be returned to the derolling device (for example, Japanese Patent Application Laid-open No. (See Publication No. 57-81839).

[Problems to be Solved by the Invention] The derolling gap automatic adjustment device proposed in Japanese Unexamined Patent Publication No. 57-81839 described in the above-mentioned conventional technology is capable of controlling the amount of paddy ( If the sorting condition of the grains (grain) or the moisture content of the paddy is not constant, the amount flowing down to the derolling may change during the operation, or the flowing condition of the mixed rice on the Mangoku net may change and it may not be sorted properly. Therefore, even if the shedding rate does not change, the amount of paddy returned to the paddy supply funnel after sorting changes, so the derolling gap is adjusted as if the shedding rate has changed, making it unreliable. It has its drawbacks.

The present invention has been made in view of the above-mentioned problems of the conventional technology, and an object of the present invention is to provide an automatic derolling gap adjustment device for a huller that is capable of stable and highly efficient work at all times and is reliable. shall be.

[Means for Solving the Problems] In order to achieve the above object, the rice hulling machine of the present invention is equipped with an automatic sorting adjustment device to perform proper sorting, and to adjust the amount of mixed rice supplied to the sorting device. A sensing sensor that operates and a sensing sensor that activates depending on the amount of paddy returned to the removal device after sorting by the sorting device are provided, and a roll gap that generates a control signal by calculating the voltage signal from each sensing sensor is provided. An automatic control circuit will be provided.

Further, the unrolling device uses a pair of unrolling rollers rotating at mutually different peripheral speeds, and includes a roll gap adjustment device that automatically adjusts the unrolling gap by receiving a control signal generated from the roll gap automatic control circuit.

The automatic roll gap control circuit is used to control the automatic roll gap control circuit during high-efficiency work, when mixed rice that has been removed and screened with an appropriate removal rate is supplied to a sorting device and is properly sorted.
The ratio between the amount of mixed rice supplied to the sorting device and the amount of paddy returned to the supply funnel after sorting is set in advance as an appropriate reference voltage value within a certain range.

[Function] The above-mentioned automatic sorting and adjustment device can handle the problem even if the sorting state of the paddy supplied to the supply funnel or the amount of paddy flowing down to the deroller changes during the operation because the moisture content is not constant.
Appropriately sort paddy into mixed rice (paddy, brown rice) and finished brown rice.

In addition, each sensor in the automatic roll gap adjustment device generates a voltage signal corresponding to the amount of mixed rice supplied to the sorting device and the amount of paddy recirculated to the supply funnel, and automatically controls the roll gap. The circuit calculates the ratio, and then compares the calculated value with a preset range of appropriate reference voltage values. If the calculated value is outside the range of appropriate reference voltage values, it is determined that the escape rate is too low or too high. Since the roll clearance is too high, a control signal is sent, and the roll clearance is adjusted to an appropriate range by the roll clearance adjustment device, so that a stable clearance with high efficiency can be obtained at all times.

[Example] Examples will be described with reference to the drawings.

Figure 1 is a schematic side view of the automatic Mangoku-type rice huller;
FIG. 2 is a circuit diagram of automatic roll gap control.

In Figure 1, 1 is the machine frame, 2 is the shutter 2a
3 represents a derolling device comprising a pair of derolling devices 4, 4' and roll shafts 4a, 4'a which rotate at mutually different circumferential speeds. The roll removal 4 is supported by a roll moving rod 28 which is movable with one end as a fulcrum, and the movement rod 28 is moved by the rotation of a control motor 30 connected to an adjustment rod 29 to close the gap between the removal rolls 4 and 4'. Adjustable by electric operation. A wind sorting section 5 for sorting the rolled rice is provided diagonally below the removing device 3, and the sorting air passage communicates with a suction winch 7 at the upper center of the machine body. Suction karaoke 7
A discharge pipe 8 is connected to discharge the wind-selected paddy to the outside of the machine. A mixed rice conveyor 22 is provided diagonally below the wind sorting section 5, and a lifting device (not shown) communicating with a mangeki funnel 6 is provided at the end of the transfer. Mangoku Funnel 6
A sensing sensor 26 consisting of a variable resistor 26a is provided below the shutter 6a provided in the apparatus for supplying mixed rice to a sorting device 46 consisting of a sieve 9 and the like. Furthermore, in Mangoku Kamami 9, there are Japanese Patent Application No. 57-41963 and Japanese Patent Application No. 57-41963 filed earlier by the applicant.
A drive device is provided with a support 19 having a structure as described in the specification of No. 55629, and upper mesh detection sensors 20, 20', and is controlled by an automatic upper mesh control circuit (not shown) in the automatic control section 13. 14
etc., the slope of the mangoku upper net 9 is automatically adjusted. Below the Mangoku upper net 9 is a reduced paddy conveyor 21.
is provided, and a reduced paddy thrower 2 is installed at the end of the transfer.
5 are arranged in series, and the thrower discharge port faces the paddy supply funnel 2. Further, a sensing sensor 27 consisting of a variable resistor 27a is provided at the thrower discharge port.
In the figure below, 10 is the middle, lower net, 11 is on the upper net support shaft, 1
2 is the middle, lower net support shaft, 15 is the drive fitting, 16 is the drive connecting rod, 17 is the connection fitting, 18 is the bottom of the upper net support shaft, 2
3 is a finishing rice conveyor, and 24 is a winch.

Next, the roll gap automatic control circuit provided in the automatic control section 13 shown in FIG. 2 will be described in detail.
The variable resistor 26a is connected to the positive terminal of an operational amplifier 33 that performs non-inverting differential multiplication, and the output terminal of the operational amplifier 33 is connected to the operational amplifier 34 through a resistor 38.
Connected to the negative terminal of Further, the variable resistor 27a is connected to the D terminal of the N-type MOS field effect transistor FET ₁ , and the S terminal of the FET ₁ is connected to the negative terminal of the operational amplifier 34. Next, the output terminal of the operational amplifier 34 is connected to the G terminal of the FET ₁ to form a negative feedback circuit and divider circuit 42.
shall be. Furthermore, the output end of the operational amplifier 34 is N type.
It is connected to the G terminal of the MOS field effect transistor FET ₂ , the D terminal of the FET ₂ is connected to the variable resistor 31, and the S terminal is connected to the negative terminal of the operational amplifier 35. A negative feedback resistor 41 is connected to the negative terminal of the operational amplifier 35 to form a multiplier circuit 43. Furthermore, the output terminal of the operational amplifier 35 is connected to the comparison control circuit 4.
The output terminals of the operational amplifiers 36 and 37 are connected to the operational amplifiers 36 and 37 in the transistor 5, and a reference voltage within a certain range set by the variable resistor 32 is applied to the operational amplifiers 36 and 37.
It is connected to Tr ₁ and Tr ₂ to excite relays 39 and 40, respectively. A control motor 30 is connected to the relays 39 and 40 via an oscillation circuit 44.
The motor 30 is operated by applying AC100V or the like.

Next, the operation of the automatic roll gap control circuit configured as above will be described in detail. First, when starting the hulling work after adjusting each part of the hulling machine at startup, the mixed rice flowing down from the Mangoku funnel 6 onto the Mangoku upper net 9 collides with the detection sensor 26, and the variable resistor 26a detects the flow rate of the mixed rice. Generates a voltage signal according to the On the other hand, the paddy properly sorted by the automatic sorting adjustment device flows down on the Mangoku upper net 9 and is returned to the paddy supply funnel 2 by the reduced paddy thrower 25 via the reduced paddy conveyor 21. Upon collision with the sensing sensor 27, the variable resistor 27a generates a voltage signal according to the flow rate of the reduced rice.

Therefore, by connecting the non-inverting amplification type operational amplifier 33 to the variable resistor 26a, differential amplification is performed, a negative potential output terminal is formed, and the current I26a flowing from the negative terminal of the operational amplifier 34 to the resistor 38 is regulated. Furthermore, the variable resistor 27a
Connect the D terminal of FET ₁ above to the operational amplifier 34.
The current I27a between D and S is controlled and divided to be equal to the current I26a flowing to the resistor 38 by the control voltage of the G terminal connected from the output terminal of
It is input to the G terminal of field effect transistor FET ₂ .

The voltage applied to the D terminal of the FET ₂ and the voltage applied to the G terminal of the FET ₂ are determined by the voltage applied to the D terminal of the FET ₂ , the negative terminal of the operational amplifier 35 connected to the S terminal of the FET ₂ , and the negative feedback resistor 41. As a result, from the operational amplifier 35, the resistor 3
8 is equal to the resistor 41 above, and the variable resistor 31 is 1V
A negative voltage obtained by dividing the voltage applied to the variable resistor 26a by the voltage applied to the variable resistor 27a is output depending on the condition that the characteristics of the FET ₁ and the FET ₂ are fixed and that the characteristics of the FET 1 and the FET 2 are the same.

The negative voltage is applied to the positive terminal of the operational amplifier 36 and the negative terminal of the operational amplifier 37, and the reference voltage within a certain range set by the reference voltage resistor 32 is applied to the negative terminal of the operational amplifier 36 and the negative terminal of the operational amplifier 37.
7, and if the negative voltage is outside the reference voltage range, transistor Tr ₁ or transistor Tr ₂ is activated, and relay 39 or relay 4 is activated.
0 is excited, and the control motor 30 rotates forward and reverse by applying AC100V or the like. Since the oscillation circuit 44 is inserted into the operating circuit of the control motor 30, the control motor 30 operates intermittently.

Depending on the forward and reverse rotation of the control motor 30, the adjusting rod 29 rotates, and the roll moving rod 28 is interlocked with the rotation.
The roll shaft 4a and the unrolling 4 move, and the unrolling gap is automatically adjusted.

The present invention is not limited to the Mangoku-type rice huller, but can also be applied to other sorting methods, such as a swing-sorting rice huller.

[Effects of the Invention] Since the present invention is configured as described above, the sorting state of the paddy supplied to the paddy supply funnel and the grain moisture content are not constant, and the amount supplied to the derolling process may vary during the process. Even in the event of a change, each part is properly adjusted to ensure high efficiency and stable evasion rate at all times.

In the past, hulling work was considered to require considerable skill, but thanks to the synergistic effect of an automatic sorting adjustment device and an automatic de-rolling gap adjustment device, anyone can easily do it with high efficiency, without damaging the brown rice, and finishing it well. It has become possible to perform a good process of hulling and sorting without any paddy mixed into the brown rice.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic side view of an automatic ten-koku type rice huller, and FIG. 2 is a schematic diagram of an automatic roll gap control circuit. 1... Machine frame, 2... Paddy supply funnel, 2a... Shutter, 3... De-rolling device, 4, 4'... De-rolling, 4a, 4'a... Roll shaft, 5... Wind sorting section,
6... Mangoku funnel, 6a... Shutter, 7... Suction kink, 8... Discharge pipe, 9... Mangoku upper net, 1
0...Middle, lower net, 11...Upper net support shaft, 12...
Middle, lower net support shaft, 13... automatic control unit, 14... drive device, 15... drive fitting, 16... drive connecting rod, 17... connecting fitting, 18... upper net support shaft lower, 1
9...Support body, 20, 20'...Upper mesh detection sensor, 21...Reduced paddy conveyor, 22...Surubiri rice conveyor, 23...Finished rice conveyor, 24...Kara winnow,
25...Reduced rice thrower, 26, 27...Detection sensor, 26a, 27a...Variable resistor, 28...
Roll moving rod, 29... Adjustment rod, 30... Control motor, 31... Variable resistor, 32... Reference voltage resistance, 33-37... Operational amplifier, 38... Resistor,
39, 40... Relay, 41... Negative feedback resistor, 4
2...Division circuit, 43...Multiplication circuit, 44...Oscillation circuit, 45...Comparison control circuit, 46...Selection device, FET ₁ , FET ₂ ...N-type MOS field effect transistor, Tr ₁ , Tr ₂ ...Transistor.

Claims (1)

[Claims] 1. In a hulling machine equipped with an automatic sorting adjustment device that automatically adjusts the sorting state of the sorting device to an appropriate state, there is a sensing sensor that is activated depending on the amount of mixed rice supplied to the sorting device, and a sorting device that controls the sorting by the sorting device. Sensing sensors are provided that operate depending on the amount of paddy to be returned to the post-clearing device, and the ratio between the amount of mixed rice supplied to the sorting device and the amount of paddy to be returned to the removing device is determined by the signal voltage from each sensor. and compares the calculated value with an appropriate reference voltage value within a certain range set in advance, and when the calculated value is outside the range of the appropriate reference voltage value, the derolling gap is automatically adjusted. Features an automatic de-rolling gap adjustment device.