JPH0146176B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a rice hulling machine that performs hulling work using a dehulling roll.

(Prior art) At the start of such hulling work, if the gap between the dehulling rolls is too wide, the dehulling rate will decrease; on the other hand, if the rolls are too close to each other or in contact with each other, the rolls will Paddy may get caught in between, resulting in damaged rice or wear of the rolls. Therefore, as a means to solve this problem,
There is a device, such as No. 91851, that rotates the motor in the reverse direction for a predetermined period of time after the rolls come into contact to keep the gap opening of the depulping rolls constant.

(Problems to be Solved by the Invention) However, with the above-described configuration, the operator has to wait for the roll gap to be automatically adjusted before performing the operation of supplying paddy to the shredding rolls (for example, opening the shutter).
As a result, the operation of hulling operations becomes complicated and efficiency may decrease.

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

That is, there is a roll gap adjustment means that can adjust the roll gap of the dehulling rolls 1 which are rotatably installed, a switching means that can switch the state of paddy supply to the dehulling rolls 1, and a drive current of the main motor that can be detected. drive current detection means, and signal output means for outputting a roll gap "open" signal to the roll gap adjustment means when the drive current detection means detects a contact state of the rolls, and when the "open" signal is output. In the present invention, the switching means is switched to the paddy supply state, and the load control of detecting the load of the machine and automatically adjusting the roll gap is possible.

(Function) First, when the contact state of the pruning roll 1 is detected by the drive current detection means, the signal output means outputs a signal indicating that the roll gap is "open" to the roll gap adjustment means. Then, the roll gap of the dehulling rolls 1 is increased by the roll gap adjusting means, but during this time, the switching means is switched to the paddy supply side, and the paddy is supplied to the dehulling rolls 1 and the hulling operation is started. At the same time,
In connection with this hulling operation, load control is performed in which the load on the hulling machine is detected and the roll gap is automatically adjusted.

(Effects) Since paddy is supplied to the dehulling rolls 1 during the roll "open" operation, it is possible to prevent damage due to jamming between the dehulling rolls 1, and to prevent overloading when starting the main motor. I can figure it out. Moreover, since this paddy supply can be automatically performed during the roll "open" operation, the labor of the worker can be reduced and the efficiency of the hulling operation can be improved. Furthermore, since load control is performed following the paddy supply operation during the roll "open" operation, this load control can be stabilized.

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

First, the structure will be described. The de-pulping rolls 1 are arranged side by side on the left and right and are installed rotatably in the direction of the two arrows inside the casing 2. Among the de-purging rolls 1, one of the de-purifying rolls A is installed in the middle part of a movable plate 3 whose lower part is pivotally connected. and,
The upper end of the movable plate 3 is screwed into a threaded portion 5 provided at one end of the adjustment shaft 4. Further, a pin 6 is inserted into and fixed to the other end of the adjustment shaft 4, and both ends of the pin 6 are formed on the inner surface of a rotating case 7 that houses the end of the adjustment shaft 4. It is provided so as to be able to engage with the rib 8. An adjustment drive gear 11 that meshes with a motor gear 10 attached to the shaft end of a geared motor 9 (roll gap adjustment means) is removably fixed to the side end of the rotating case 7 with a screw. Reference numeral 12 denotes a regulating bolt for regulating the movement of the rotating case 7 in the thrust direction.

Therefore, when the geared motor 9 rotates, this rotational power is transmitted to the rotating case 7 through the adjusting drive gear 11 meshing with the motor gear 10, so that the rib 8 rotates together with the rotating case 7, and the pin 6 Then, the adjustment shaft 4 integrally formed with the pin 6 is rotated. When the geared motor 9 rotates in the forward direction, the threaded portion of the movable plate 3 moves in the direction of the arrow X around the pivot portion, so the depulping roll A also moves in the same direction. Widen the gap with the other roll. On the other hand, when the geared motor 9 rotates in reverse, the movable plate 3 and the scraping roll A move in the direction opposite to the direction of the arrow X to narrow the gap between the rolls or come into contact with each other.

Reference numeral 13 denotes a funnel stand provided at the upper end of the casing 2 in which the dehulling roll 1 is housed, and having a chaff supply port 14 on the bottom surface. A paddy feed roller 15 for feeding falling paddy to the dehulling roll 1 is installed below the paddy supply port 14 so as to be rotatable in the direction of the arrow. The funnel stand 13 also has a rotatable funnel opening/closing plate 16 whose tip end can adjust the perspective of the paddy feed roller 15 and switch between supplying and stopping the paddy supplied into the funnel stand 13 to the husking roll 1. It is freely mounted on 17 shafts. At a lower position of the shaft 17, one end is rotatably installed on the funnel stand 13, and the other end is mounted on the funnel stand 13 at a 90-degree angle.
An opening/closing handle 19 is provided by bending the opening/closing handle 19 by bending the opening/closing handle 19 by 90 degrees and protruding outward from the operation panel 18. And the funnel stand 1 of the opening/closing handle 19
An opening/closing cam 20 that can be attached to and detached from the lower surface of the funnel opening/closing plate 16 is detachably attached to the third side end, and a handle rotating body 22 having a receiving plate 21 on the upper surface is detachably attached to the bending side. It is attached to.

A solenoid 24 for reciprocating the plunger 23 in the direction of the arrow is provided on the back side of the operation panel 18.
A solenoid base 25 to which a switching means (switching means) is attached is detachably provided with a screw (not shown). And, at the tip of the plunger 23,
An arm 27 is detachably attached so that the opening/closing handle 19 can be rotated in the direction of the arrow by contacting the receiving plate 21 (see FIG. 4), and whose vertical movement is restricted by the arm receiving plate 26.

28 has one end attached to the stay 29 attached to the back of the panel 18, and the other end attached to the opening/closing handle 1.
9 is a spring attached to the shaft end of the arm 27, which acts to “open” the arm 27 (move in the direction of arrow A);
Alternatively, the opening/closing cam 20 is held at the A position in connection with the "open" operation of the opening/closing handle 19, and the opening/closing cam 20 is held in the B position in connection with the "close" operation of the opening/closing handle 19.
(See Figure 1).

Next, to explain the block circuit shown in Fig. 5, numeral 29 is an arithmetic control unit of a microcomputer (hereinafter referred to as CPU), which has a built-in memory containing necessary data such as control programs, constant K, and preset reference values. (not shown), input ports 30, 31, 32 and output ports 33, 34 corresponding to respective inputs and outputs, and performs arithmetic and logical operations and comparison operations. The input port 30 has an input side connected to an analog switch 35 and a D/A converter 3.
The output side of the comparator 37 is connected to the output side of each of the comparators 6 and 6. Further, the D/A converter 3
6 is an input port 3 that can input/output the CPU 29
Connected to 1 and 32.

The input side of the analog switch 35 is connected to a current transformer 40 (driving current detection means) that detects the driving current of the main motor (the motor that drives each rotating part of the huller) through the amplifier circuit 38 and the rectifier circuit 39. ). Therefore, the drive current detected by the current transformer 40 and inputted from the analog switch 35 to the comparator 37 via the circuits 39 and 38 is converted into a digital amount and is input to the input port 30 of the CPU 29.

A drive command signal given from the CPU 29 is sent via the output port 34 to a relay circuit 41 that can energize the solenoid 24 that opens the funnel opening/closing plate 16.
and a forward rotation drive circuit 4 that drives the geared motor 9.
2 and the reverse rotation drive circuit 43 (signal output means). When an "H" level signal is output to the forward rotation drive circuit 42 side, the geared motor 9 rotates forward to "open" the roll gap, and
When an "H" level signal is output to the reverse drive circuit 43 side, the geared motor 9 is configured to rotate in reverse to "close" the roll gap.

The CPU 29 has the functions described below. In other words, when the main motor drive command signal is input,
A drive command signal for turning the analog switch 35 "ON" is output from the output port 33. Captures the digital amount of drive current of the main motor. A roll slight contact current obtained by adding a preset constant to the drive current of the main motor during no-load is stored. A drive command signal is output to the reverse rotation drive circuit 43 via the output port 34. Compare the main motor drive current and slight contact current. Set the timer.
A drive command signal is output to the normal rotation drive circuit 42 via the output port 34. A drive command signal is output to the relay circuit 41 via the output port 34. A drive command signal is output to the forward rotation drive circuit 42 or reverse rotation drive circuit 43, which adjusts the roll gap by comparing the drive current of the main motor under load with a preset reference value (performs load control).

Next, to explain the operation using the flowchart in Figure 6, first, when the main motor drive operation is performed, the main motor is driven and rotates each rotating part of the huller, and when this operation is input, CPU29
outputs an “ON” drive command signal from the output port 33 to the analog switch 35. Then, the drive current of the main motor during this no-load state is measured (step S10), and then converted into a digital quantity and input into the CPU 29 via the input circuit 30.
Next, the roll slight contact current obtained by adding a constant K to the no-load current (that is, the current is slightly larger than the no-load current) is memorized (step
S20), and a drive command signal is output to the reverse rotation drive circuit 43 via the output port 34 to narrow the roll gap (step S30). Then, the drive current of the main motor at this time is measured (step S40), and this measured value is compared with the roll slight contact current (step S50), and when the measured value becomes larger than this roll slight contact current, The output of the drive command signal to the reverse rotation drive circuit 43 is stopped (step S60).

Subsequently, after the timer is set (step S70), a drive command signal is issued from the CPU 29 to the forward rotation drive circuit 42 via the output circuit 42 to open the roll gap (step S80). and,
When the time set in the timer has elapsed (step S90), the timer is reset (step S100) and then set again (step S110).
A drive command signal is output from the CPU 29 to the relay circuit 41 via the output port 34, and the solenoid 24
is excited (step S120). Then, the plunger 23 moves in the direction of arrow A and pulls the arm 27 in the same direction, so that the receiving plate 2
1 and the handle rotating body 22 also rotate in the same direction (in the direction of arrow B in FIG. 4) to rotate the opening/closing handle 19. At this time, the opening/closing handle 19 is further pulled and held by the spring 28, and the opening/closing cam 20 also rotates from the B position to the A position. The plate 16 also rotates in the direction of arrow B (see FIG. 1), and the paddy fed into the funnel stand 13 is fed in a predetermined amount by the paddy feed roller 15 to the dehulling roll 1 side to be dehulled.

In such work, when the set time of the timer has elapsed (step S130), the drive command signal given from the CPU 29 to the relay circuit 41 is stopped and the solenoid 24 is de-energized (step S140), but the opening/closing handle 19 As described above, since it is pulled by the spring 28 (in this case, it has exceeded the fulcrum), it does not automatically return to its original position.

Further, the load current of the main motor measured by the current transformer 40 is converted into a digital quantity, taken in by the CPU 29 via the input circuit 30, and compared with a preset reference value. If this measured value is smaller than the reference value, the CPU 29 sends the reverse drive circuit 43
Output a drive command signal to, and conversely, if it is larger,
A drive command signal is output from the CPU 29 to the forward rotation drive circuit 42 to close or open the roll gap.
Load control is performed to increase the load (step S150).
Thereafter, it is also possible to switch from load control to hulling rate control based on the hulling rate of paddy and brown rice.

In this way, the roll gap is opened after the rolls 1 are brought into slight contact, but in the middle of this "opening", paddy is automatically supplied, the hulling operation is performed, and the shift to load control is performed, so that the worker's It is possible to save operational effort and stabilize load control.

In addition, when stopping the stripping operation, the operator rotates the opening/closing handle 19 protruding outward from the operation panel 18 to a predetermined position in the direction opposite to the direction of arrow B, and then the spring 28 pulls the handle 19. At the same time, the opening/closing cam 20 is also moved from the A position to the B position.
The funnel opening/closing plate 16 is rotated in the direction opposite to the direction of the arrow B, that is, upward, so that the paddy feed roll 15 can prevent the paddy from falling.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side sectional view of the de-pupping device, Fig. 2 is a plan view of the funnel opening/closing plate, Fig. 3 is a side view of the plunger, and Fig. 4 is a side sectional view of the plunging device. The figure is a sectional view of the opening/closing handle, FIG. 5 is a block circuit, and FIG. 6 is a flowchart. 1 indicates a deflated roll.

Claims (1)

[Claims] 1. Roll gap adjustment means that can adjust the roll gap of the dehulling rolls 1 that are rotatably installed, and switching means that can switch the state of paddy supply to the dehulling rolls 1;
A drive current detection means capable of detecting the drive current of the main motor; and a signal output means for outputting a signal indicating that the roll gap is "open" to the roll gap adjustment means when the drive current detection means detects a contact state of the rolls. ,
A rice hulling machine configured to switch the switching means to a paddy supply state when the "open" signal is output, and to detect the load of the machine and perform load control to automatically adjust the roll gap.