JPS5916548A - Dehulling ratio controll apparatus of dehulling machine - 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] The present invention relates to a dehulling rate control device for a rice huller.

In the paddy layer machine, it is necessary to maintain an appropriate dehulling rate of dropped rice, and today a dehulling rate control device for this purpose has been proposed and commercialized, but it is difficult to automatically control the dehulling rate smoothly and quickly. There are still problems in getting it started. In this type of control device, the roll gap that gives the desired demolition rate is manually adjusted, and based on this, the standard for automatic control is set and lead is set. Since the roll gap is indirectly related to the demolding roll by electrical means, it is difficult to determine how much the roll gap will change due to this adjustment. There were problems in that the amount of adjustment was too large or too small, making it difficult to obtain the desired roll gap, and that it took a long time to reach stable operation through automatic control.

Accordingly, the present invention is intended to improve the above-mentioned drawbacks of the prior art, and its purpose is to provide a desired demolition rate, facilitate the setting of the 1"-hole gap, and start automatic control smoothly and promptly. The object of the present invention is to provide a frame removal rate control device that enables the following.

To achieve this objective, the present invention is characterized by having a motor and a manual handle for adjusting the roll gap mechanically associated with the stripping roll, allowing the roll gap to be adjusted electrically or manually. An adjustment mechanism (1), a reference load that is adjusted and set based on the load of the roll drive motor during shedding at a roll gap that gives a desired culm ratio, and a detection load of the sheathing motor that varies. It is equipped with a roll gap control means for automatically controlling the roll gap adjustment mechanism according to the comparison, and further includes a switch (SWl) for switching the roll gap control between automatic and manual, and a display means (3, LEDl) for displaying the adjustment setting of the reference load. ) is added to the roll gap control means, and before the start of automatic control of the roll gap, the M semi-load is adjusted and set according to the roll gap that gives the desired 11f2 coverage, which is set by manual operation of the roll gap adjustment mechanism (1). The first function is in the dehulling rate control device of the rice huller.

The present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic diagram of a rice grain sump related to the present invention, in which reference numeral ``U'' indicates a husking section, and 20 indicates a swinging sorting section.

The husking section 1'' is provided with a frame removal chamber 7 which communicates with the supply hopper 5 and the hopper, and a shutter 5a that freely opens and closes the hopper outlet is interposed in the communication section between the two. A control valve 9a and a feed roll 9b located at the entrance of the dehulling chamber 7 below the shutter 5a control the amount of paddy to be supplied to a pair of dehulling rolls (11a, 11b) provided in the deweighing chamber. It is controlled by the valve opening degree, and as described later, the swinging sorting section 20f7
) Mechanically related to the vertical movement of the floating hopper. The stripping roll consists of a main roll 11a and an auxiliary roll 111), which are rotated by a roll drive motor (not shown) with a predetermined circumferential speed difference. A roll gap d is provided between the rolls, and the roll gap d is adjusted by moving the sub roll 11b in the horizontal direction in the drawing by the roll gap adjustment mechanism 1. The mechanical relationship between the roll gap adjustment mechanism 1 and the auxiliary roll 11b is such that the mechanism 1 is engaged with the screw shaft 13 of the mechanism 1, and the rotation support shaft 1
This is achieved by connecting the conductor 17, which rotates with the rotation of the screw shaft 13 about the fulcrum 5, to the shaft 19 of the auxiliary roll 11b. The roll gap adjustment mechanism 1 includes a motor and a manual handle for adjusting the roll gap, and can adjust the roll gap electrically or manually.

The swinging sorting section 201 includes a swinging hopper 21 and a swinging sorting plate 23, and the swinging hopper 21 is suspended by an elastic body 25 and moves up and down according to the internal storage amount of rice to be sorted. Hopper 2
The vertical movement of No. 5 is related to the control valve 9a of the rice hulling section 10, and the valve opening is small when the amount is stored, and the valve opening is small when the amount is stored. The oscillating sorting plate 23 is swung diagonally from left to right in the drawing upwardly by a not-illustrated shovel, and the rice to be sorted from the floating hopper 21 is sorted by specific gravity.

Note that the dash-dotted line in Figure 1 does not indicate the flow of grains.

FIG. 2 shows a specific example of the roll gap adjustment mechanism, which includes a motor M and a manual handle 27 for adjusting the roll gap. The motor M has a motor gear 31 on its drive shaft via a reducer 29, and the gear 31 is connected to the handle gear 3 of the manual handle 27.
It meshes with 3. The manual handle 27 is connected to the screw shaft 13 so as to rotate it, and the rotation of the screw shaft 13 causes the induction body 17 to rotate about the rotation support shaft 15 and rotate the sub roll relative to the main roll. The roll gap is adjusted by moving the rolls toward and away from each other. Adjustment of the roll gap by rotation of the screw shaft 13 is possible using either the motor M or the manual handle.In the case of a manual handle, the desired roll gap width can be adjusted from the 1st to It is now possible to do so.

On the other hand, automatic adjustment of the roll gap by the motor M is performed by a roll gap control means described below.

3(a) and 3(b) show an embodiment of the roll gap control means, FIG. 3(a) is a block diagram thereof, and FIG. A concrete circuit example of 6 is shown in Fig. 3 (a) and (b). 1j;2 Based on the fact that it is possible to maintain the dehulling rate of the piled paddy at a substantially constant level, the load on the roll drive motor is detected and the load always maintains the desired dehulling rate. The goal is to keep the unframed ratio constant by controlling the roll gap so that it is approximately equal to the applied reference load.

Therefore, as shown in FIG. 3(a), there is a means 41 for detecting the load of the roll drive motor, a means 43 for setting a reference load for achieving a desired frame removal rate, a load detecting means 41 and a reference load setting means 43. A comparator circuit 45 which compares both output levels and provides a comparative output according to the magnitude of the detected load with respect to the reference load, and a delay circuit (47a, 47b) which provides a delay to the comparator circuit output in order to prevent roll gap control from being tilted according to the comparison result. , has an output circuit 49 that drives the forward or reverse rotation relay (R1 or R1) of the roll gap adjustment motor M (FIG. 2) according to the comparison output given via the delay circuit, and also The output circuit 3 includes an automatic/manual changeover switch SW1 and an output circuit 3 that outputs a match between the detected load and the reference load and lights up an LED1. Further, the conditional circuit 51 in the figure provides a comparison circuit output to the output circuit 49 via AND-1 and AND-2 when the amount stored in the floating hopper 21 (FIG. 1) is within a predetermined range. When the storage capacity of the hopper 21 is almost full (at this time, the opening degree of the control valve 9a is extremely small) or when it is almost empty, the automatic control of the roll gap is canceled,
This prevents damage to the stripping roll and overload on the roll drive motor.

The output of the condition circuit 51 is also sent to the condition output circuit 53, and during automatic control, L is maintained while the amount stored in the idle hopper is within the appropriate range.
Turn on the EDI. In addition, L E l) 2 indicates that the automatic control is in progress, and SW2 indicates the rice hulling part 1 sword in Figure 1]
The open state is maintained and covered by the presence of the supplied paddy with a paddy filter placed in the supply hopper 5. In addition, SW3 is a shutter switch that responds to the opening and closing of the rice vines 5a and maintains the open state between the shutters, and SW4 electrically controls the gap between the rolls instead of operating a manual handle. This is the 1C switch that is manually operated.

As shown in FIG. 3 (1), the load detection means 41 detects the load of the removal roll drive motor by the current transformer c,
-r, and the DC level C is output through the amplifier circuit 411 and the smoothing circuit 412. Reference load setting means 4
3 has an amplifier 431 whose output can be adjusted and set by a variable amplification volume 431VR, and a load detection means 41
In relation to the exit number j of -C, a reference load is set that allows the desired removal rate to be obtained. In other words, set the standard load first! jJ / When operating the manual handle of the roll gap adjustment mechanism 1 (Fig. 2) when the manual changeover switch SW1 is in the manual state, J:
The roll gap that provides the desired DH+1 ratio is set, the load of the roll drive motor that is removed at the roll gap is detected by the load detection means 41, and the polycomb 431 V R is adjusted to match and cover the detected load. 6 will be carried out.

At this time, give the desired frame removal rate [1-L gap is sub-L1-
Since this is done by a manual handle that is directly connected mechanically to the roll, changes in the roll gap can be seen at a glance, and it is easy to see how much 1;2 weighing ratio can be obtained with what roll gap. In light of the operator's conventional experience, it is possible to perform the -C operation, and it is easy to set the [''-le gap to give the desired de-framing rate. As the input of the Ic-th amplifier 431 that provides such a reference load, -C
In addition to the reference voltage 433, the control valve 9a (Fig. 1)
The outputs of the clamp circuit 435 and the valve opening lens 7137 are provided in order to obtain the desired frame removal rate even when the load on the roll drive motor changes due to changes in the valve opening. In other words, the relationship between the amount of paddy supplied to the four valve openings, that is, the load on the roll drive motor, and the load on the roll drive motor is as shown in Figure 4. When obtaining rice drop, there is a parabolic ratio, and as the valve opening increases, the -C load increases. Therefore, the reference voltage EE
If the reference load is set based only on /l 33, it will not be possible to maintain the 1l12 weighing rate constant against changes in the valve opening. The 85% line is approximated as a straight line as shown by the dashed line in the figure, so that the amplified output is placed on the line of the desired frame removal rate regardless of the valve opening degree.-C17
" For example, 85% of the line is moved in KV rows at a predetermined voltage, and there is a method C' that corrects for differences or variations in the characteristics of the roll drive motor.

The comparison circuit 45 has a pair of amparators (451a, 451b) as shown in FIG. The reference load 451a is connected to the reference load Lj, and the divided voltage Lj of the reference load is applied to the reference load 4511). That is, if the output of the load detection means 41 is x1, the output of the reference load setting means 43 is Y, and its partial pressure value is Y', the comparator 451a compares Give the output, and when X<Y-, comparator 4
51b provides a comparison output. If Y'<X<Y, the comparison horn is zero, indicating that the detected load almost matches the reference load.

The output of the comparison circuit/15 is sent to the delay circuit (717a, 47b
) and A N l) are applied to the C output circuit 49 through the gate, and the automatic/manual changeover switch is in the automatic state, the switches SW2 and SW3 are in the on state, and the conditional circuit 51
If the output of b21 (Fig. 1) is a predetermined amount, the relay (1TE1 or R2) of the roll gap adjustment motor is driven according to the comparison output, and the detected load is automatically adjusted to match the reference load. Control works.

The output of the comparator circuit 45 is also input to the out-of-frame rate OK output circuit 3. The frame removal rate OK output circuit 3 is connected to the standard load setting means 4.
When the output of the reference load setting means 43 almost matches the load of the roll drive motor that gives the desired frame removal rate by adjusting the reference load setting polycomb/13IVR in step 3, L IE
l) This indicates that the base QI-load has been set with respect to 1, and the output of the comparator circuit 45 turns off A, and the output is given by turning off both transistors L-rl and R2. 8N +) 301 and the corresponding △N
t) has a 1-transistor r3 driven by the output and points I-EDI;

The transistors Trl and R2 are turned off when the comparison output is zero, and the voltage applied to their respective collectors is input to ΔND301,
Due to C, T1-3 is turned on and EDl is lit. On the other hand, if the comparison output is not zero, Trl or 1-r2 is turned on, so the collector potential of the transistor in the on state becomes zero potential, and -f-r3 becomes in the off state.

Note that the conditional circuit 51 includes a pair of comparators (511a,
511b) and is closely related to the storage capacity of the floating hopper.
The upper and lower limits of the amount stored in the hopper are determined according to the opening degree of the control valve, and when the amount is within a predetermined range defined by the upper and lower limits, 1'' is output.

In the case of automatic control using the dehulling control device configured as described above, the roll drive motor is driven to avoid rotation of the deweighing roll, and the automatic/manual changeover switch SW1 is set to the manual state, and then the supply hopper 5 is loaded with paddy. , set the desired unrolling rate to 73 [1-Enter the roll gap setting 1. To set the roll gap, first set the initial gap (normally 7 to 8 m/m), check the frame removal rate at the gap, and readjust the roll gap if necessary to obtain the desired frame removal rate.

If the desired shedding rate is obtained through the above manual operation, the LED is turned on by driving the horn circuit 3 to match the load of the roll drive motor during shedding in the gap.
The reference load adjustment volume 413 VR of the reference load setting means 43 is adjusted until the reference load is lit, and the reference load is set. Next, when the automatic/manual changeover switch SW1 is set to the automatic state, automatic control of the frame removal rate will be started in accordance with the set reference load.

J3, manual switch S for manual operation of roll gap
Although it is possible to do this using W4, it is easier to use a manual handle because of the ease of adjusting the roll gap.

As explained above, according to the present invention, the automatic control 211 is used to set the reference load, which is the basis of the automatic control of the removal rate. By manually operating the roll gap adjustment mechanism that is mechanically related to the dehulling roll, the roller gap adjustment mechanism 1~ that provides the desired dehulling rate is easily adjusted, and the roll gap adjustment mechanism is 1j: When setting the load of the roll drive motor in one culm as the reference load, the IC displays the coincidence, making it easier to adjust the reference load and start automatic control smoothly and quickly. Possible lt2
A culm rate control device can be provided.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of a huller, Figure 2 is an example of a roll gap adjustment mechanism, Figures 3 (a) and 3 (1) are examples of roll gap control means, and Figure 4 is a roll drive. FIG. 5 is a diagram illustrating the relationship between the motor load and the opening degree of the control valve, and is an explanatory diagram of the operation of the comparison circuit shown in FIGS. 3(a) and 3(b). 1: Roll gap adjustment mechanism SWI: Automatic/manual changeover switch 3 Two-culm rate OK output circuit LEDI: Light emitting diode

Claims (1)

[Claims] A roll gap adjustment mechanism that can electrically or manually adjust the roll gap by using a motor and a manual handle for adjusting the roll gap mechanically associated with the roll, and a desired removal (7) Automatically control the roll gap adjustment mechanism according to the comparison between the base 1% load, which is adjusted based on the load of the roll drive motor during demolition with the roll gap giving the ratio, and the detected load of the IB2 scale roll drive motor. The roll gap control means further includes a switch for switching the roll gap control to automatic or manual and a display means for displaying the adjustment setting of the reference load.
Before starting the automatic control of the roll gap, a desired demolding rate is set by manual operation of the roll gap adjustment mechanism 1.
- A dehulling rate control device for a rice huller, characterized in that the -C reference load can be adjusted and set according to the grain gap.