JPH0526548B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a huller for hulling grains such as paddy.

(Prior art) As means for performing adjustment control between rolls, there is a means for carrying out adjustment control based on a hulling ratio calculated by distinguishing between mixed grains of paddy and brown rice that have been scraped off by the hulling rolls;
There is a means of detecting the load current of the main motor.

(Problems to be Solved by the Invention) However, since the shedding rate control means calculates the shedding rate and adjusts the distance between rolls, it is possible to perform control based on the shedding rate with high accuracy. In order to obtain an accurate pulp removal rate, it is necessary to distinguish large amounts of paddy and brown rice, which takes a lot of time. Also,
The load control means performs the control based on the load of the traction motor, so even though it has the advantage of being able to perform control quickly, it does not allow accurate roll spacing.
There is a problem with not being able to get accommodation.

(Means for Solving the Problems) The present invention aims to solve these technical problems, and has taken the following technical measures.

Between the rolls of the dehulling roll: A dehulling rate reference control means that performs adjustment control based on the shedding rate of the mixed grains that have been slipped off, and a load current that performs adjustment control based on the load current value of the electric motor that drives the dehulling roll. A hulling machine equipped with a standard control means is provided with a hulling rate setting means that can set a hulling rate, and the hulling ratio set by the hulling rate setting means and the measured hulling rate measured by a discrimination sensor are set. A means for outputting a control command signal for the load current standard is provided, which is adjusted during the shedding roll based on the load current standard when the difference from the value is large, and is discriminated from the set shedding rate set by the shedding rate setting means. The present invention is characterized by providing a means for outputting a control command signal for the shedding rate standard, which adjusts the time during the shedding roll based on the shedding rate standard when the difference from the measured shedding rate value measured by the sensor is small. The configuration of the control device between the dehulling rolls in the hulling machine was adopted.

(Function) First, the operator operates the shedding rate setting means to set the set shedding rate, and the measured shedding rate calculated based on the measurement data from the discrimination sensor 27 and the set shedding rate are compared. When the difference between the two shedding ratios is greater than a predetermined value, a control command signal is output from the load current-based control command signal output means to the roll-to-roll adjustment means, and the roll-to-roll adjustment is performed. Also, when the difference between the two shedding ratios is less than a predetermined value, a control command signal is output from the control command signal output means based on the shedding ratio to the roll adjustment means, and the difference between the shedding ratios is outputted to the roll adjustment means. 〓Adjustments are made.

(Effect) When the difference between the measured shedding ratio and the set shedding ratio is greater than a predetermined value and the adjustment is not stable during the shedding roll, a control command based on the load current reference is output to the load current reference control means, Since the distance between the de-pulling rolls is automatically adjusted, the difference from the standard value can be quickly measured and the time between de-pulling rolls can be adjusted quickly, and the labor of adjusting the time between de-pulling rolls by the operator can be reduced. In addition, since the load current reference control can be automatically shifted to the shredding rate control, it is possible to continue the hulling operation without interrupting the automatic adjustment control between the hulling rolls, increasing the efficiency of the hulling work. It is possible to improve the

(Example) Hereinafter, an example of the present invention will be specifically described based on the drawings.

First, to explain its configuration, the huller 2
Above the wind sorting section 3, there is a dehulling section 4 and a mixed rice sorting section 5.
(In the example, a large number of depressions are formed on the inner peripheral surface,
It is equipped with a rotary sorting cylinder type sorting system that scoops up and sorts the grains in this depression. It communicates with the rice sorting section 5 for sorting (for example, brown rice and mixed rice), and is integrally constructed.

The scraping section 4 is rotatably installed in a casing 6 whose upper and lower ends are open, and includes a scraping roll 1 whose distance can be adjusted from one side to the other, and a supply funnel provided at the upper end of the casing 6. It is composed of 7 mag. An opening/closing shaft 9 whose shaft end protrudes outward from the operation panel 8 is rotatably attached to the inner upper part of the casing 6, and an opening/closing shaft 9 on the casing 6 side is rotatably attached to the opening/closing shaft 9. An opening/closing plate 10 is removably attached to the panel 8 so that the paddy fed into the supply funnel 7 can be switched to and stopped from being supplied to the dehulling roll 1 side in relation to rotation along a long groove 11 formed in the panel 8. An opening/closing sensor 12 consisting of a limit switch that can be turned on when the opening/closing shaft 9 is located at the upper end of the long groove 11 (that is, when the opening/closing plate 10 is in the "closed" position) is installed at the upper end of the long groove 11. It is set up.

Reference numeral 13 denotes a roll unfolding lever that can widen the space between the rolls of the de-pulling roll 1 to a predetermined distance, and is configured to turn on a limit switch (roll unfolding sensor) 14 when it is in the "open" position. are doing. Note that this deployment means is similar to known means (for example, using a cam). Reference numeral 15 denotes a manual handle that allows fine adjustment of the distance between the rolls of the depulping roll 1.

Next, a description will be given of the means for adjusting the distance between the de-pudding rolls 1. The de-pudding rolls 1 are arranged side by side on the left and right and are installed inside the casing 2 so as to be rotatable in the direction of the arrow. Among the de-purging rolls 1, one of the de-purifying rolls A is installed in the middle part of a movable plate 16 whose lower part is pivotally connected. The upper end of the movable plate 16 is screwed into a threaded portion 18 provided at one end of the adjustment shaft 17. Further, a pin 19 is inserted through and fixed to the other end of the adjustment shaft 18, and this pin 19
Both ends of the adjustment shaft 17 are provided so as to be able to engage with ribs 21 formed on the inner surface of a rotating case 20 that houses the ends of the adjustment shaft 17 therein. An adjustment drive gear 24 that meshes with a motor gear 23 attached to the shaft end of a geared motor 22 (roll-to-roll adjustment means) is removably fixed to the side end of the rotating case 20 with a screw. Reference numeral 25 denotes a regulating bolt that regulates the movement of the rotating case 20 in the thrust direction.

Therefore, when the geared motor 22 rotates, this rotational force is transmitted to the rotating case 20 via the adjustment drive gear 24 that meshes with the motor gear 23, so that the rib 21 rotates together with the rotating case 20, and the pin 19 Then, the adjustment shaft 17 integrally formed with this pin 19 is rotated. When the geared motor 22 rotates normally, the threaded portion of the movable plate 16 moves in the direction of arrow X around the pivot portion.
The stripping roll A also moves in the same direction to widen the distance between it and the other roll. On the other hand, when the geared motor 22 rotates in reverse, the movable plate 16 and the scraping rolls A move in the direction opposite to the direction of the arrow X, narrowing the gap between the rolls or bringing them into contact.

Reference numeral 25 denotes a reflecting plate provided below the dehulling roll 1, which diffuses mixed grains of paddy and brown rice that fall under the dehulling action of the dehulling roll 1. and,
The upper end of the reflector 25 is located below the reflector 25.
A sample tube 26 is provided close to the sample tube 5 and has a lower end projecting outward from the side plate of the wind selection section 3. A sensor unit 28 having a sensor 27 for determining whether the sample grains discharged from the sample tube 26 is paddy or rice is detachably attached to the outside of the wind sorting section. The discrimination sensor 27 is a transmission type sensor that includes a light emitting element such as a light emitting diode and a light emitting element such as a phototransistor, and discriminates whether it is paddy or brown rice based on the amount of light emitted from the light emitting element. In addition, the grain after discrimination or the sensor 27
A part of the sample particles overflowing in the sensor unit 28 is configured to be returned to the wind selection unit 3.

To explain the block circuit of FIG. 8, the microcomputer 29 consists of an arithmetic and control unit (CPU) that performs comparison operations, arithmetic and logic operations, etc., and a memory that stores control programs, necessary data, etc. There are digital information output from the A/D converter 30 and information output from the interface 31. The information input to the A/D converter 30 includes the load information of the main motor 33 (which is the drive source for each rotating part of the huller 2) detected by the load detection sensor 32, and the discrimination sensor There is information on paddy/rice discrimination from 27. Also,
The information input to the input interface 31 includes the opening/closing information of the opening/closing plate 10 from the opening/closing sensor 12 and the skipping rate setting information from the skipping rate setting switch 34.

In addition, as the load detection sensor 32, the ninth
As shown in the figure, a current transformer 35 and a rectifier circuit 36
, a smoothing circuit 37, an amplifier circuit 38, and the like. Further, the stripping rate setting switch 34 is provided in a control box 39 detachably attached to the front of the operation panel 8, and by adjusting the displayed number from the smaller to the larger (1 to 7), It is configured so that the control current can be set to higher values in order and the shedding rate can be increased (see FIG. 10). That is, as shown in Fig. 11, when the efficiency is N, the removal rate (N1 = 80%, N2
= 82%, ...N6 = 92%, N7 = 94%) can be adjusted.

The output information of the microcomputer 29 includes a drive command signal that is output via an output interface 40 to a forward rotation drive circuit 41 that rotates the geared motor 22 in the forward direction and a reverse rotation drive circuit 42 that rotates it in the reverse direction.

The microcomputer 29 has the following functions. That is, the load detection sensor 32
The detected load current of the main motor 33 is compared with a reference value stored in a memory in advance, and if the load current is larger than the reference value, a drive command signal is output to the forward rotation drive circuit 41. On the other hand, when you are small,
A drive command signal is output to the reverse rotation drive circuit 42.
The digital amount of the discrimination signal detected by the discrimination sensor 27 is taken in and compared with a pre-stored paddy rice discrimination reference value to discriminate whether it is paddy or brown rice and to count the number of grains. Then, when a predetermined number of grains is reached, the dehulling rate is calculated from the number of brown rice (or the number of paddy grains).
The skipping rate calculated in is compared with the set skipping rate set in advance with the skipping rate setting switch 34, and
When the measured shedding rate is larger than the set shedding rate, a drive command signal is output to the forward rotation drive circuit 41, and on the other hand, when it is smaller, a drive command signal is output to the reverse rotation drive circuit 42. It is determined whether the difference between the measured shedding rate and the set shedding rate is greater than a predetermined value, and if it is above, the load detection sensor 32 controls the load control means, and if it is below, the shedding rate is determined by the shedding rate sensor 27. Select the control means side.

Next, the operation will be explained using the flowchart shown in FIG. 12. First, the main motor 33 is started to drive each rotating part of the huller 2, and a desired husking rate is input using the husking rate setting switch 34 (step S10). Then, a control current corresponding to the pulp removal rate and work efficiency is read into the CPU 29 (step S20).

Next, when the operator operates the opening/closing shaft 9 to open the opening/closing plate 10, the paddy that had been supplied to the supply funnel 7 falls and is subjected to the dehulling action by the dehulling roll 1, and then undergoes the wind sorting action on the way. Receiving gutter for dropping rice (not shown)
to fall. At this time, some sample grains among the grains that have been slid down and reflected on the reflection plate 26 are guided from the sample cylinder 26 to the sensor unit 28 side, where they are subjected to a discrimination action by the discrimination sensor 27. receive. Then, when it is determined that the opening/closing plate 10 is in the "open" state (step S30), the CPU 29
The shedding rate is calculated based on the discrimination signals of the discrimination sensor 27 that are sequentially taken in (step S40).
Subsequently, the CPU 29 calculates the difference between the measured skipping rate and the set skipping rate (step S50), and then compares and calculates whether this difference is larger than a preset value (step S60). If it is determined that the load current is large, the load detection sensor 32 detects the load current of the main motor 33 during hulling work (step S70), and then performs a comparison operation to determine whether the preset control current and the measured load current are equal. (step S80). And if it is determined that they are equal,
If the roll distance is not adjusted (step S90), but it is determined that they are not equal, a comparison calculation is made to see if the control current is smaller than the measured load current (step S90).
S100). When it is determined that the rotation is small, a drive command signal is output from the CPU 29 to the forward rotation drive circuit 41 to open the roll gap (step S110).
When it is determined that the load is large, that is, the load is light, a drive command signal is output to the reverse drive circuit 42 to close the roll gap (step S120).

In step S60, when it is determined that the difference is smaller than the set value, the set shedding rate and the discrimination sensor 2
It is calculated whether the set shedding ratios detected in step 7 are equal (step S130), and if it is determined that they are equal, no adjustment is made between the rolls of the shedding roll 1 (step S140). If it is determined that they are not equal, a comparison calculation is made to see if the set shedding rate is smaller than the measured shedding rate (step S150), and if it is determined that the set shedding rate is smaller than the measured shedding rate. A drive command signal is output to the reverse drive circuit 41 to open the gap between the rolls (step S160), and on the other hand, if it is determined that the gap is large, a drive command signal is output to the reverse drive circuit 42 to open the gap between the rolls. Set it to "closed" (step S170).

In this way, when the difference between the set shedding rate and the measured shedding rate is larger than the set value, the roll-to-roll adjustment control is performed by load control, so that the roll-to-roll adjustment can be performed quickly. It saves the worker the trouble of adjusting between rolls and improves labor savings. Additionally, if the difference in the shedding rate becomes smaller than the set value during the load control, it is possible to automatically shift to the shedding rate control, so there is no interruption between the load control and the shedding rate control. 〓Can be controlled. Therefore, it is possible to perform automatic adjustment between the rolls with high precision.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a partially cutaway side view of a rice huller, and Fig. 2 is a partially cutaway side view of a rice huller.
The figure is a plan view of the opening/closing plate, Figure 3 is an enlarged view of the long groove, Figure 4 is an action diagram of the roll unfolding lever, Figure 5 is a side sectional view of the peeling roll, and Figure 6 is a plane cross section of the discrimination sensor unit. Figure 7 is a cross-sectional view of the back, Figure 8 is the block circuit, Figure 9 is the load detection circuit, Figure 10 is the front view of the control box, Figure 11 is a diagram of the relationship between efficiency and control current, and Figure 12 is the diagram of the relationship between efficiency and control current. The figure is a flowchart, and FIG. 13 is a diagram showing the operation. 1 indicates a deflated roll.

Claims (1)

[Claims] 1 Between the rolls of the dehulling rolls: A dehulling rate reference control means that performs adjustment control based on the shedding rate of the mixed grains that have been slipped off, and a load that performs adjustment control based on the load current value of the electric motor that drives the dehulling rolls. A hulling machine equipped with a current reference control means is provided with a hulling rate setting means that can set a hulling rate, and the hulling machine is equipped with a hulling rate setting means that can set a hulling rate, and the hulling machine has a hulling machine that can set a hulling rate. A means for outputting a control command signal of a load current standard is provided, which is adjusted during the shedding roll based on the load current standard when the difference from the shedding ratio is large, and the set shedding ratio set by the shedding ratio setting means and the set shedding ratio are adjusted. The method is characterized by being provided with a control command signal output means for the shedding rate standard, which adjusts the time during the shedding roll based on the shedding rate standard when the difference with the measured shedding rate value measured by the discrimination sensor is small. A control device between dehulling rolls in a rice hulling machine.