JPH0515948Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an inter-roll control device in a rice huller.

(Prior Art) Japanese Patent Application Laid-Open No. 118745/1983 discloses a method for adjusting the derolling period in a rice huller based on the derolling rate. Japanese Patent Application Laid-open No. 105246/1983 discloses a method for adjusting the derolling period based on the opening degree of the supply control valve. In addition, in the rice hulling machine that has been put into practical use, the derolling period is automatically controlled based on the derolling rate.
If an abnormality occurs in this automatic adjustment control means, there are some that switch to manual adjustment to perform the work.

(Problems to be solved by this invention) JP-A-56-118745 and JP-A-57-105246
The one in the publication adjusts the derolling period based on the derolling rate, or adjusts the derolling period based on the opening degree of the supply control valve for derolling, and is automatic. No consideration is given to the case where an abnormality occurs in the adjustment control. In addition, in systems that adjust the amount of paddy during derolling based on the derolling rate, in those that switch to manual adjustment in the event of an abnormality and continue work, the amount of paddy supplied to the deroller or the amount of paddy during derolling is adjusted based on the subjective opinion of the operator. This can lead to a decrease in work efficiency and contamination of paddy into brown rice.

(Means for Solving the Problems) This invention includes a shedding rate standard adjustment control means that automatically adjusts the distance between the rolls of derolling 1 based on the shedding rate of the scraped rice that has been hulled by derolling, and A valve opening standard adjustment control means that automatically adjusts the roll distance of the derolling 1 from the opening degree of the valve 2 that adjusts the amount of grain supplied to the derolling 1, and a paddy/brown rice discrimination sensor of the derolling rate standard adjustment control means. 19 is normal, when an abnormality occurs in the normal control signal output means which outputs a control signal to the yelp rate reference adjustment control means with priority, and the paddy/brown rice discrimination sensor 19 of the yelp rate reference adjustment control means. Between rolls in a rice huller equipped with an abnormality control signal output means for outputting a control command signal preferentially to a valve opening reference adjustment control means
This is the configuration of the control device.

(Function) In the hulling operation, a shedding rate control is performed that automatically adjusts the distance between the rolls of derolling 1 based on a measured shedding rate and a set standard shedding rate, or a valve for supplying grain to derolling 1 is used. The amount of grain supplied to the deroller 1 is adjusted in relation to the change in the opening degree of the deroller 2, and the distance between the rolls of the deroller 1 is controlled based on the valve opening degree. When the paddy/brown rice discrimination sensor 19 of the rate standard adjustment control means is normal, a control command signal based on the rate standard is output, and control is performed during derolling based on the rate standard, and the rate standard adjustment is performed. When an abnormality occurs in the paddy/brown rice discrimination sensor 19 of the control means, a control command signal is output preferentially to the valve opening reference adjustment control means, and the derolling is adjusted based on the valve opening reference. Ru.

(Effect) When an abnormality occurs in the paddy/rice discrimination sensor 19 that discriminates between paddy and rice, it becomes impossible to perform hulling work while adjusting the derolling process based on the derolling rate standard. Sometimes, a control command signal is output preferentially to the valve opening reference adjustment control means, and the hulling operation can be continued while adjusting the derolling based on the valve opening reference. It is possible to improve work efficiency without significantly interrupting the process, and since the influence of subjective adjustment by the operator is small, it is possible to reduce the amount of paddy mixed into brown rice and improve work accuracy.

(Example) Hereinafter, an example of this invention will be described in detail based on the drawings.

First, to explain its configuration, the huller 3
The machine is equipped with a removing device 4 and a mixed rice sorting device 5 equipped with a cylindrical rotary sorting machine having a large number of depressions on the inner peripheral surface, and a wind sorting device 6 at the bottom of the machine. Then, the detaching device 4 is connected to the casing 7.
A de-roll 1 is installed inside the roll so that it can be rotated and sorted in the direction of the arrow. One of the roll-removal members 1 is installed at the intermediate portion of a movable plate 8 whose lower portion is pivotally connected. The upper end of the movable plate 8 is screwed into a threaded portion 10 formed at one end of the adjustment shaft 9. Further, a pin 11 is inserted into and fixed to the other end of the adjustment shaft 8, and both ends of the pin 11 are formed on the inner surface of a rotating case 12 in which the end of the adjustment shaft 9 is housed. It is provided so as to be able to engage with the rib 13. Then, the rotating case 1
At the side end of 2, there is an adjustment drive gear 1 that meshes with a motor gear 15 attached to the shaft end of a geared motor 14.
6 is removably fixed with screws. Reference numeral 17 denotes a regulating bolt that regulates the movement of the rotating case 12 in the thrust direction.

Therefore, when the geared motor 14 rotates, this rotational power is transmitted to the rotating case 12 via the adjusting drive gear 16 meshing with the motor gear 15, so that the rib 13 rotates together with the rotating case 12, and the pin 11 The adjusting shaft 9, which is integrally formed with the pin 11, is rotated. When the geared motor 14 rotates normally, the threaded part of the movable plate 8 moves in the direction of arrow A around the pivot part x, so the unrolling A also moves in the same direction and the other Widen the distance between the roll and the roll. On the other hand, when the geared motor 14 rotates in reverse, the movable plate 8 and the roll release A move in the direction opposite to the direction of arrow A, narrowing the distance between the rolls or bringing them into contact.

Further, a funnel 18 is provided in the casing 7, and a grain sensor 18 is installed at the bottom of the funnel 18 to detect when the amount of grains is below a predetermined amount.
A is provided.

Further, on the outer wall of the wind sorting device 6, there is installed a paddy/rice discriminating device 19 that takes in sample grains, which are part of the scraped rice that has been de-processed by the de-rolling process 1, and distinguishes between paddy and brown rice. It is detachable. The paddy/rice discriminating device 19 is equipped with a photosensor (not shown) consisting of a light emitting element and a light receiving element. % or higher voltage is considered paddy, and lower voltage is considered brown rice.)
It is configured to measure.

Reference numeral 20 denotes a shutter provided between the roll removal 6 and the funnel 17, and a shutter sensor 21 (limit switch in the embodiment) for detecting opening/closing of the shutter 20 is provided nearby. Reference numeral 22 denotes a thrower that supplies the dropped rice to the mixed rice sorting device 3, and 23 a thrower that lifts the finished rice sorted by the mixed rice sorting device 3 to the outside of the machine.

Further, the mixed rice sorting device 5 is rotatably equipped with a cylindrical sorting tube 24 that can draw up and sort the supplied mixed rice of paddy and brown rice. In the sorting tube, on the side of the mixed rice supply port, the upper end is attached to a rotary shaft 25 which has an axis in the same direction as the axis of the sorting tube 24 and is rotatable. A layer thickness sensor 26 is provided.

A valve shaft 27 having an axis in the same direction as the axis of the roll-off 1 is rotatably provided in the casing 7 above the roll-off 1. Then, the valve 2 having a rectangular shape in plan view is attached to the valve shaft 27, and the valve shaft 27 is attached to the valve shaft 27.
The tip of the valve 2 is configured to rotate in the vertical direction in relation to the rotation of the valve 7, thereby adjusting the amount of grains falling toward the de-rolling side. The valve shaft 27 and the rotating shaft 25 are configured to be capable of transmitting power via a transmission mechanism 28 such as a link, arm, or rotating plate. That is,
When the mixed rice is accumulated on the sorting starting end side and the sensing body 26 rotates in the direction of arrow B, the valve 2 rotates upward via the rotation shaft 25, transmission mechanism 28, and valve shaft 27 to separate the grains. When the amount of falling rice decreases and the amount of mixed rice decreases, the sensing body 26 rotates in the direction opposite to the direction of arrow B. In connection with this, the valve 2 rotates downward to remove the grains. The structure is designed to increase the amount of fall.

Note that a valve opening sensor (for example, a potentiometer) 29 is provided at the tip of the valve shaft 27, and the valve 2
The opening degree (position) of the opening can be detected. 36
is a manual adjustment tool that can manually adjust the distance between the rolls, and can be adjusted in the range from dial 1 (elimination rate "low") to dial 6 (elimination rate "high").

Next, to explain the block circuit of FIG. 4, 30 is an arithmetic control unit (hereinafter referred to as CPU) of a microcomputer having a built-in memory (not shown) containing data, control programs, etc. Perform arithmetic and logical operations. And the applicable
Information input to the CPU 30 via the input interface 31 includes valve opening information from the valve opening sensor 29, paddy/rice discrimination information output from the paddy/rice discrimination sensor 19, and rotation of the huller 1. Motor load information from a current transformer (hereinafter referred to as CT) 32 that detects the load current of the main motor 32, which is the drive source;
There is escape rate setting information etc. from the escape rate setting switch. Also, from the CPU 30 to the buffer register 3
The drive command signal outputted via the roll opening output circuit 3 that rotates the geared motor 14 in the normal direction is
Roll “open” signal to 4, roll “close” to roll close output circuit 35 which reverses geared motor 14.
There are traffic lights etc. The CPU 30 has the following functions.
That is, the paddy/rice discrimination information output from the paddy/rice discrimination sensor 19 is input to determine whether it is paddy or rice. When the discrimination data reaches a predetermined number, the evasion rate is calculated. The measured evasion rate is then compared with the set evasion rate set via the evasion rate setting switch. If the measured escape rate is outside the specified range than the set escape rate,
For example, when it is high, a signal is output to the roll open output circuit 34, and when it is low, on the other hand, a signal is output to the roll close output circuit 35. Then, when the difference falls within a predetermined range, the output of the drive command signal is stopped. A comparison calculation is made between the motor load measurement value obtained by inputting the motor load information output from C.T32 and the reference value obtained from the valve opening information output from the valve opening sensor 29 (see Figure 5). do. If the motor load measurement value is outside the specified range from the reference value,
For example, if the signal is high, a signal is output to the roll open output circuit 34, and on the other hand, if it is low, a signal is output to the roll close output circuit 34.
A signal is output to 5. Then, when the difference falls within a predetermined range, the output of the drive command is stopped.

Next, the operation will be explained using the flowchart shown in FIG. First, after starting the main motor 32 to drive each rotating part of the machine body, a desired escape rate is set by operating the escape rate setting switch. After supplying the paddy to the funnel 18, the shutter 20
When opened, the paddy inside this funnel falls and is de-rolled in the de-rolling process 1. Then, the mixed rice of paddy and rice is air-selected by the air-selecting device 6, and then sent to the sorting start end of the sorting tube 24 via the thrower 22 and appropriate conveyance means. Then, the mixed rice is transferred to a rotating sorting tube 2.
The mixed rice containing a large amount of paddy is sent to the removing device 4 via an appropriate conveyance means, and the mixed rice containing a large amount of rice is sorted in a sorting cylinder and processed into finished rice. is sent to the bottom of the wind selection device 6 via a suitable conveyance means and then discharged to the outside of the machine by the thrower 23. It should be noted that the finished rice is subjected to wind selection action by this wind selection device 6 on the way.

In this work, the information outputted from the paddy/rice discrimination device 19 is taken into the CPU 30 to discriminate whether it is paddy or rice, and when the data reaches a predetermined number, the omission rate is calculated. Then, the CPU 30 compares and calculates the measured ejection rate and the set ejection rate, outputs a drive command signal to either of the circuits 34 and 35, and widens or narrows the distance between the rolls of the deroll 1. , or if the difference is within a predetermined range, the drive command signal is not output and the distance between the rolls is maintained in that state.

However, when the CPU 30 determines that an abnormality has occurred in the paddy/rice discriminating device 19 (for example, foreign matter has adhered to the sensor or the line has been disconnected) (step 10), it opens the valve via the input interface 31. The opening degree of the valve 2 is detected from the valve opening degree information output from the degree sensor 29 (step 20). next,
The CPU 30 calculates a reference value corresponding to the opening degree from the opening degree of the valve 2 (step 30), and then calculates the reference value corresponding to the opening degree of the valve 2 (step 30).
The load current of the main motor 32 is calculated by taking in the motor load information output from the main motor 32 (step 40).
Then, the CPU 30 compares and calculates the measured load value and the reference value, and determines whether the difference is within a predetermined range (step 50). Next, the CPU 30 determines whether the measured load value is higher than the reference value (step
60), if it is determined that the voltage is high, it outputs a drive command signal to the roll open output circuit 34 via the buffer register 33, and on the other hand, if it is determined that it is low, it outputs a drive command signal to the roll close output circuit 35 through the buffer register 33. If it is within the predetermined width, the drive command signal is not output.

Therefore, when the roll opening output circuit 34 receives the drive command signal, it rotates the geared motor 14 in the forward direction to widen the distance between the rolls of the unrolled 1, and when the roll close output circuit 35 receives the drive command signal, , the geared motor 14 is reversely rotated to narrow the distance between the rolls.

In this way, if an abnormality occurs in the derolling rate control, the system will then shift to valve control and control the derolling rate.
Since the distance between the rolls is automatically controlled, it is possible to improve work efficiency and work accuracy.

[Brief explanation of drawings]

The figures show one embodiment of this invention, in which Fig. 1 is a side view of the rice huller, Fig. 2 is a front sectional view of the dehulling device with a portion cut away, and Fig. 3 is the valve and sensor body. FIG. 4 shows a block circuit, FIG. 5 shows a relationship between valve opening and reference voltage, and FIG. 6 shows a flowchart. 1 indicates derolling, and 2 indicates a valve.

Claims (1)

[Scope of utility model registration request] A shedding rate standard adjustment control means that automatically adjusts the distance between the rolls of the derolling 1 based on the shedding rate of the scraped rice that has been hulled by derolling, and a valve that adjusts the amount of grain supplied to the derolling 1. When the valve opening standard adjustment control means automatically adjusts the distance between the rolls of derolling 1 from the opening degree of 2 and the paddy/brown rice discrimination sensor 19 of the derolling rate standard adjustment control means is normal, the derolling rate standard adjustment control means a control signal output means for outputting a control command signal in a normal state with priority, and a control signal output means for giving priority to the valve opening degree reference adjustment control means when an abnormality occurs in the paddy/brown rice discrimination sensor 19 of the evasion reference adjustment control means. An inter-roll control device in a rice huller, comprising an abnormality control signal output means for outputting a command signal.