JPS61167448A - Dehulling roll gap controller in huller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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 a means for performing roll gap adjustment control, there is a method 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, and a means for performing roll gap adjustment control. There is a means for detecting the load current (a problem to be solved by this invention), but the shedding ratio control means calculates the shedding ratio and adjusts the roll gap, so it is possible to achieve a highly accurate shedding ratio. Although it is possible to perform control based on the following, it takes a lot of time because it is necessary to distinguish large amounts of paddy and brown rice in order to obtain an accurate dehulling rate. Further, since the load control means performs the control based on the load of the main transmission, even though it has the advantage of being able to perform control quickly, there is a problem that highly accurate roll gap adjustment cannot be achieved.

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

That is, a pulping rate control means performs roll gap adjustment control of the pulverizing roll (1) based on the pulping rate of the mixed grains that have been scraped off, and a load control means performs the roll gap adjustment control based on the load current of the main transmission. The hulling machine is equipped with a hulling rate setting means that can set the hulling rate, and when the difference between the set hulling rate and the measured hulling rate is large, load control by the load control unit is possible. The structure is designed to enable the removal rate to be controlled by the removal rate control means when the removal rate is small.

(Function) First, the set shedding rate set by the operator etc. and the measured shedding rate calculated based on the measurement data are compared and calculated.
When the difference in the depulping rate is more than a predetermined value, the roll gap control is performed by the load control means, and when it is less than the predetermined value, the roll gap of the depulping roll (1) is controlled by the depulping rate control means. Regulatory control is provided.

(Effects) The roll gap of the shredding rolls is automatically adjusted based on the load control by the load control means until the threshing ratio control by the threshing ratio control means is stabilized, thereby reducing the labor and effort required by the operator to adjust the roll clearance. It can reduce labor. In addition, since it is possible to automatically shift from this load control to shedding rate control,
It becomes possible to perform the hulling operation continuously without interrupting the automatic control of the roll gap, and the work efficiency can be improved.

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

First, to explain its configuration, the huller (2) has a hulling section (4) and a mixed rice sorting section (5) above the wind sorting section (3).
(In the embodiment, it is a rotary sorting cylinder type sorting system in which a large number of depressions are formed on the inner circumferential surface and the particles are scooped up and sorted by the depressions.) The received mixed rice is wind sorted in the wind sorting section (3) and then transferred to the mixed rice sorting section (3).
5), it is connected and integrally configured for sorting (for example, brown rice and mixed rice).

The stripping section (4) is rotatably installed in a casing (6) with open upper and lower ends, and includes a stripping roll (1) whose distance can be adjusted from one side to the other, and the casing (6).
) at the upper end of the feed funnel (7).

An opening/closing shaft (9) whose shaft end protrudes outward from the operation panel (8) is rotatably attached to the upper part of the casing (6), and an opening/closing shaft on the casing (6) side (
9) The shaft end has a long groove (1) formed in the operation panel (8).
An opening/closing plate (10) is removably attached which can switch the paddy supplied into the supply funnel (7) to the dehulling roll (1) side in relation to the rotation along 1). At the upper end of the long groove (11), an opening/closing shaft (9) is attached to the long groove (11).
When located at the upper end (i.e., the opening/closing plate (lO) is "closed"
position), an opening/closing sensor (12) consisting of a limit switch that can be turned ON is provided.

Reference numeral (13) is a roll expansion lever that can widen the gap between the rolls of the scraping roll (1) to a predetermined gap. ”. Note that this deployment means is similar to known means (for example, using a cam). (15) is a manual handle that allows fine adjustment of the roll gap of the depulping roll (1).

Next, the adjustment means for the de-pudding rolls (1) will be explained. The de-pudding rolls (1) are arranged side by side on the left and right and are installed in the casing (2) so as to be rotatable in the direction of the arrow. Among the deflated rolls (1), one deflated roll (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) has an adjustment shaft (
17) is screwed into a threaded portion (18) provided at one end of the adjustment shaft (18), and a bottle (19) is inserted through and fixed to the other end of the adjustment shaft (18). Both ends of (19) are
A rotating case (20) that houses the end of the adjustment shaft (17).
) is provided so as to be able to engage with a rib (21) formed on the inner surface. At the side end of the rotating case (20), there is an adjustment drive gear (
24) is removably fixed with screws. (25) is 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) meshing with the motor gear (23), so that the rotational force is transmitted to the rotating case (20) together with the rotating case (20). The rib (21) rotates to rotate the pin (19) and the adjustment shaft (17) integrally formed with the pin (19). And the geared motor (
22) is in normal rotation, the threaded part of the movable plate (16) moves in the direction of the arrow (X) around the pivot part, so the depulping roll (A) also moves in the same direction. On the other hand, the geared motor (22) increases the gap between the roll and the other roll.
If the is reversed, the movable plate (16) and the scraping roll (
A) moves in the direction opposite to the direction of the arrow (X) to narrow the gap between the rolls or bring them into contact.

(25) is a reflecting plate provided below the dehulling roll (1), which diffuses the mixed grains of paddy and brown rice that fall under the dehulling action of the dehulling roll (1). A sample tube (26) is provided below the reflector (25), the upper end of which is close to the reflector (25), and the lower end of which protrudes outward from the side plate of the wind selection section (3). ing. A sensor unit (28) having a sensor (27) for determining whether the sample grains discharged from the sample tube (26) are paddy or rice is detachably attached to the external force of the wind sorting section.

The discrimination sensor (27) consists of a light emitting element such as a light emitting diode and a light receiving element such as a phototransistor,
This is a transmission type sensor that determines whether it is paddy or brown rice based on the amount of light emitted from this light emitting element. In addition, the grains after discrimination or some of the sample grains that overflowed in the sensor unit (27) are transferred from the sensor unit (28) to the wind sorting unit (27).
3) It is configured so that it can be reduced within.

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 and necessary data. A for information
There is digital information output from the /D converter (30) and information output from the interface (31). The information input to the A/D converter (30) includes the main motor (which is the drive source for each rotating part of the huller (2)) (33) detected by the load detection sensor (32). load information, and paddy/rice discrimination information from the discrimination sensor (27). Further, the information input to the input interface (31) includes the opening/closing plate (i) of the opening/closing sensor (12).
o) There is opening/closing information and skipping rate setting information from the skipping rate setting switch (34).

In addition, as the load detection sensor (32), as shown in FIG. 9, a current transformer (35), a rectifier circuit (36),
It is composed of a smoothing circuit (37), an amplifier circuit (38), and the like. In addition, the stripping rate setting switch (34) is provided in a control box (39) detachably attached to the front of the operation panel (8), and is set from the smaller number to the larger number (l to 7). By combining the control currents, it is possible to set the control current to a higher value in order to increase the shedding rate (see Fig. 1θ), that is,
As shown in Fig. 11, when the efficiency is N, the removal rate (N1
=80%, N2=82%,...N8=92%, N7
=94%) can be adjusted.

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

The microcomputer (29) has the following functions. That is, ■ Compare the load current of the main motor (33) detected by the load detection sensor (32) with a reference value stored in the memory in advance, and if the load current is larger than the reference value, the forward rotation drive circuit A drive command signal is output to (41) 0. Conversely, when it is small, a drive command signal is output to the reverse rotation drive circuit (42). (2) The digital amount of the discrimination signal detected by the discrimination sensor (27) is taken in and compared with the 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
Comparison calculation is made with the set shedding rate set in step 4), and if the measured film coverage is larger than the set shedding rate, the forward rotation drive circuit (4)
1), and conversely, when it is small, a drive command signal is output to the reverse rotation drive circuit (42). ■Determine whether the difference between the measured film coverage rate and the set shedding rate is greater than the specified value,
If it is above, the load control means side using the load detection sensor (32) is selected, and if it is below, the shedding rate control means side using the shedding rate sensor (27) is selected.

Next, the operation will be explained using the flowchart of FIG. 12. First, the main electric motor (33) is started to drive each rotating part of the huller (2), and the desired husking rate is input using the husking rate setting switch (34) (step 5I).
O) Then, the control current corresponding to this scraping rate and work efficiency is read into the CPU (29) (step 520).
.

Next, the operator operates the opening/closing shaft (9) to open/close the opening/closing plate (1).
0) is opened, the paddy that had been supplied to the supply funnel (7) falls and is subjected to the dehulling action by the dehulling roll (1). (not shown). At this time, among the grains that have been slid down and reflected on the reflector (26), some of the sample grains are guided from the sample tube (26) to the sensor unit (28), where they are taken to the discrimination sensor (26). 27). The S
(Step 330), calculates the shedding rate based on the discrimination signals of the discrimination sensor (27) that are sequentially input into the CPU (29) (Step 540);
In step (29), the difference between the measured film coverage and the set shedding rate is calculated (step 350), and then a comparison calculation is made to see if this difference is larger than a preset value (step 560).
), and if it is determined to be large, the load detection sensor (32) detects the load current of the main motor (33) during hulling work (step 370), and then calculates the preset control current and the measured load. A comparison calculation is made to see if it is equal to the current (step 5aO), and if it is determined that they are equal,
If the roll gap is not adjusted (step 590) 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 3100).When it is determined that the control current is smaller than the measured load current, the CPU (29 ) outputs a drive command signal to the forward rotation drive circuit (41) to adjust the roll gap to
If 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 3120). .

In step S60, when it is determined that the difference is smaller than the set value, it is calculated whether the set shedding rate and the measured film coverage detected by the discrimination sensor (27) are equal (step S513).
0), if it is determined that they are equal, the roll gap adjustment of the scraping roll (1) is not performed (step 5140), and if it is determined that they are not equal, then the set scraping rate is A comparison calculation is made to see if it is smaller than the rate (step 3150), and if it is judged to be smaller, the CPU
A drive command signal is output from (29) to the forward rotation drive circuit (41) to open the roll gap (step 3160).
If it is determined that the reflection is large, a drive command signal is output to the reverse rotation drive circuit (42) to close the roll gap (step 3170).

In this way, when the difference between the set shedding ratio and the measured film coverage is larger than the set value, the roll gap adjustment control is performed by load control, so the roll gap can be controlled quickly and , it is possible to improve labor saving by eliminating the labor of the operator in adjusting the roll gap. Furthermore, during the load control,
When the difference in pulp removal rate becomes smaller than the set value, it is possible to automatically shift to the removal rate control, so that roll gap control can be performed without interrupting load control and removal rate control.

Therefore, it is possible to automatically adjust the roll gap with high precision.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway side view of the rice huller, Fig. 2 is a plan view of the opening/closing plate, and Fig. 3 is an enlarged view of the long husk. , Fig. 4 is an operational view of the roll unfolding lever, Fig. 5 is a side sectional view of the de-pudding roll, Fig. 6 is a plan sectional view of the discrimination sensor unit, Fig. 7 is a back sectional view thereof, and Fig. 8 is the block. The circuit shown in FIG. 9 is a load detection circuit, and the circuit shown in FIG. (1) indicates a deflated roll.

Claims (1)

[Claims] A pulp removal rate control means for controlling the roll gap adjustment of the pulp removal roll (1) based on the removal rate of the mixed grains that have been rubbed off;
In a hulling machine equipped with a load control means based on the load current of the main transmission, a hulling ratio setting means capable of setting a hulling ratio is provided, and the difference between the set hulling ratio and the measured hulling ratio is A spacing control device for shredding rolls in a hulling machine configured to enable load control by a load control means when the difference is large, and to enable threshing ratio control by a shredding ratio control means when the difference is small.