JP6566382B2 - Burn-out prevention device for detaching roll in hulling machine - Google Patents

Description

  The present invention relates to an apparatus for preventing burning of a pair of detachment rolls provided in a hulling machine.

  Conventionally, this type of apparatus is provided with a raw material tank and a sensor for optically detecting the presence or absence of grains in the raw material tank at the upper part of a pair of detachment rolls. Then, when this sensor detects that the grain in the raw material tank has run out, the control unit determines that the hulling operation has been completed, and deploys the pair of detaching rolls to the non-contact position, Control is performed to prevent burning and deformation.

  However, since the sensor is a type that optically detects the presence or absence of grain in the raw material tank, there is no grain in the raw material tank due to dirt on the lens surface of the sensor, dirt adhering to the sensor, etc. Regardless, there was a case where an output signal indicating that there was a raw material was issued. Such a malfunction is not limited to the above-described optical sensor, and even a capacitive sensor or an ultrasonic sensor may cause a malfunction due to dust adhering to a signal detection location. Such a malfunction is determined because the control unit determines that the hulling operation is still continued, and the pair of detachment rolls rotate in contact with each other in an empty state (the state in which there is no supply of the raw material basket). There was a risk of deformation of the pro roll and burning, which was very dangerous.

  In order to deal with the above problem, the invention described in Patent Document 1 is sensitive to a pair of left and right detaching rolls for removing the grain, and whether or not the detaching rolls are provided below the detaching rolls. Technically, it comprises a slide-out detection sensor composed of a pressure-sensitive element, and a detaching roll expanding means for expanding the pair of left and right detaching rolls to the non-contact state after the detaching operation based on the detection output of the sensor. It is a measure taken. Thereby, the end of the hulling operation is reliably detected by detecting the presence or absence of the sliding by the pair of hulling rolls. There exists an effect | action and effect that burnout and a deformation | transformation prevention of a roll can be performed reliably.

  However, in the invention described in Patent Document 1, since the slide-out detection sensor comprising a pressure-sensitive element is provided directly under the removing roll, the fallen rice containing rice husks directly collides with the sensor and wears out early. There is a problem that there is a fear that the durability is not suitable for practical use. That is, the rice husks produced during the rice bran are husks wrapping brown rice, and the ingredients are dietary fibers, but they are hard substances containing silicic acid which is a raw material of glass.

JP-A-1-151948

  In view of the above problems, it is a technical object of the present invention to provide a derolling roll burnout prevention device suitable for practical use with improved durability.

In order to solve the above problems, the present invention provides a raw material tank for temporarily storing raw materials, a lower limit sensor for detecting a lower limit value of the raw materials in the raw material tanks, a detaching portion comprising a pair of detaching rolls, A flow detection sensor for detecting the flow of the grain in the post process than the pu part or the detachment part, the lower limit sensor detects a signal indicating no grain, and the flow detection sensor detects a signal indicating the presence of the grain flow. when detected, it is determined that the raw material rupture during hulling work, the set and a control unit for stopping the hulling working with husking portion only, the flow detection sensor, after the husking portion Ru provided mixed rice discharge channel communicating between the winnowing portion provided in step and mixed rice AgeKoku machine, it took technical means of.

Furthermore, the invention according to claim 2 is characterized in that the flow detection sensor includes a gate plate that receives a grain when the grain flows down the mixed rice discharge passage, and a displacement when the gate plate rotates. It is formed by the displacement detection body which detects the outer side of the rice discharge flow path, and the sensor main body which detects the displacement of the displacement detection body on the outer side of the mixed rice discharge flow path.

According to a third aspect of the present invention, there is provided a raw material tank for temporarily storing raw materials, a lower limit sensor for detecting a lower limit value of the raw materials in the raw material tanks, a detaching portion comprising a pair of detaching rolls, A flow detection sensor for detecting the flow of the grain in the post process than the pu part or the detachment part, the lower limit sensor detects a signal indicating no grain, and the flow detection sensor detects a signal indicating the presence of the grain flow. when detected, it is determined that the raw material rupture during hulling work, the only set and a control unit for stopping the hulling working with husking portion, said flow sensor is, rotation of the husking rolls The vibration detection sensor is fixed to the shaft bearing.

  According to the present invention, a raw material tank for temporarily storing a raw material, a lower limit sensor for detecting a lower limit value of the raw material in the raw material tank, a detaching portion comprising a pair of detaching rolls, and the detaching portion or detaching portion. When the flow detection sensor that detects the flow of the grain in the later process than the pu part, and the lower limit sensor detects a signal indicating that there is no grain, and the flow detection sensor detects a signal that indicates that there is a grain flow Since the control unit for determining that the raw material is running out during the hulling operation and stopping the hulling operation at the detaching unit is provided, the control unit performs a double check between the lower limit sensor and the flow detection sensor. Therefore, it is possible to reliably stop the hulling work and prevent deformation of the detachment roll and burnout as compared with the case where only the lower limit sensor is installed. it can. In addition, since the sensor itself is a detachment part or a flow detection sensor that detects the flow of grain in the post-process rather than the detachment part, durability is also improved. In particular, when the lower limit sensor detects a signal indicating no grain during the hulling operation, and the flow detection sensor detects a signal indicating that there is a grain flow, the control unit is out of raw material during the hulling operation. Therefore, the reliability of automatic stopping of the hulling machine is improved, and it is possible to provide a derolling roll burnout prevention device suitable for practical use.

Then, the pre-Symbol flow sensor, the at Rukoto provided mixed rice discharge channel communicating between the winnowing unit and mixed rice AgeKoku machine provided in step after husking portion, after the husking portion Between the wind selection section of the process and the mixed rice cereal machine, the mixed rice composed of rice bran and brown rice, from which the rice husk has been removed in the wind selection section, is discharged from the mixed rice discharge path. Therefore, since the flow of mixed rice that does not contain rice husk, which is a hard substance, is detected by the flow detection sensor, durability (wear resistance) is improved as compared with a sensor using a conventional pressure sensitive element.

Furthermore, according to the invention of claim 2 , the flow detection sensor includes a gate plate that receives the grain when the grain flows down the mixed rice discharge channel, and a displacement when the gate plate rotates. Is formed by a displacement detection body that detects the outside of the mixed rice discharge flow path and a sensor body that detects the displacement of the displacement detection body, so that the displacement detection that detects a mutation when the gate plate rotates Since the body and the sensor main body are installed outside the flow path, the sensor main body is not subjected to the collision of the grains, so that the durability (wear resistance) is improved.

According to the third aspect of the present invention, since the flow detection sensor is a vibration detection sensor fixed to the bearing of the rotary shaft of the removal roll , if the vibration detection signal is analyzed, the removal portion The vibration when the grain does not pass through the dehulling part, before or after the hulling when the raw material koji is not supplied to, It can be easily discriminated from the vibration when passing. As a result, the double check between this vibration detection sensor and the lower limit sensor reliably detects the out of raw material during the hulling operation, and stops the hulling operation to reliably prevent deformation of the detachment roll and burning. can do.

It is a flowchart which shows the flow of each process of a hulling machine. It is a front view which shows the external appearance of a hulling machine. It is a partially broken sectional view which shows schematic structure of the mixed rice discharge flow path and the flow detection sensor arrange | positioned in this flow path. It is a block diagram which shows the electrical connection relationship of a sensor, a control part, and a drive part. It is a flowchart which shows an example of the operation | movement in the structure of embodiment of this invention. It is a flowchart which shows an example in the case of material shortage. It is an error message shown on the touch panel of a control part. It is an example of the power spectrum intensity | strength which identifies whether it is during the hulling work by vibration analysis.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings. FIG. 1 is a flowchart showing the flow of each process of the hulling machine, and FIG. 2 is a front view showing the appearance of the hulling machine.

  As shown in FIG.1 and FIG.2, the rice huller 1 of this invention removes the rice husk and the light and light impurities from the detachment part 2 which consists of a pair of detachment rolls 2a and 2b, and the brewed rice after detachment. Wind selection unit 3 for wind selection, swing selection unit 4 for selecting wind-selected mixed rice into rice bran, brown rice and mixed rice by swinging selection action, and grains among the selected brown rice are enriched The main part is a grain selection unit 5 that performs sieving between sized and immature grains.

  The removal unit 2 and the wind selection unit 3 are overlapped to form an integral structure, and the wind selection unit 3 and the rocking selection unit 4 are connected via a mixed rice cerealing machine 6 and a mixed rice tank 7. I'm in touch. In addition, the swing sorting unit 4 and the grain sorting unit 5 communicate with each other via a brown rice masher 8.

  Reference numeral 9 denotes a masher for returning the cocoon, which pulverizes the sorting mash in the swing sorting section 4 or the overflow mash that could not be crushed by the detaching section 2 and re-supplied to the thawing section 2. To play a role. Reference numeral 10 denotes a control unit for controlling each unit. Reference numeral 11 denotes a suction fan, which plays a role for discharging rice husks and foreign substances separated by the wind selector 3 to the outside of the apparatus. Reference numeral 12 denotes a raw material tank of the removal unit 2. Reference numeral 13 (see FIG. 1) is a tank returning tank to the detaching section 2. Reference numeral 9a is a switching valve for switching whether the straw mashed by the masher 9 is supplied to the raw material tank 12 or discharged outside the machine. Reference numeral 8a is a switching valve that switches whether the brown rice cerealed by the cerealing machine 8 is supplied to the grain sorter 5 or discharged outside the machine.

  The raw material tank 12 of the removal unit 2 is provided with a lower limit sensor 12a for detecting the lower limit value of the grain (see FIG. 1), and when the lower limit sensor 12a is turned on (that is, the state where the raw material is accumulated). In addition, the user can set the time for starting the removal unit 2 immediately. On the other hand, when the lower limit sensor 12a is turned off (that is, in a state where the raw material is exhausted), the user can set the time whether or not to stop the detachment unit 2 immediately.

  The return tank 13 of the detaching unit 2 is also provided with an upper limit sensor 13a for detecting the upper limit value of the grain (see FIG. 1). This upper limit sensor 13a detects an overflow of the return soot. When the upper limit sensor 13a is turned on (that is, a state immediately before the return soot increases and overflows from the return tank), the swing selection is immediately performed. The user can set the time whether or not to stop the unit 4. On the other hand, when the upper limit sensor 13a is turned off (that is, in a state in which the return wrinkles are reduced), the user can set the time whether or not to start the swing sorting unit 4 immediately. Furthermore, when the upper limit sensor 13a is turned on (that is, a state in which return traps increase and overflow from the return tank), the user can also set a time for whether or not to issue an alarm immediately.

  Reference numeral 14 denotes a mixed rice discharge passage that communicates between the wind selector 3 and the mixed rice cerealing machine 6. The mixed rice discharge passage 14 has a flow for detecting the flow of mixed rice. A detection sensor 15 is provided.

  The configuration of the flow detection sensor 15 will be described in detail with reference to FIG. FIG. 3 is a partially broken sectional view showing a schematic structure of the mixed rice discharge flow path 14 and the flow detection sensor 15 disposed in the flow path 14. FIG. 3A shows a state in which the flow detection sensor 15 does not operate (does not transmit an ON signal) in a state where the grains (mixed rice) are flowing in the flow path 14, and FIG. The state where the flow detection sensor 15 operates (transmits an ON signal) in a state where the grain (mixed rice) does not flow in the flow path 14 is shown.

  As shown in FIG. 3, the mixed rice discharge flow path 14 is formed of a bowl-like chute such as a square pipe, and the mixed rice flows through the bottom surface 14 a of the bowl-like chute 14. A gate plate 17 is provided in the bowl-like chute 14 to receive the rice when the mixed rice flows down, and at this time, the gate plate 17 is rotated about the rotation shaft 16 by the pressure when the rice flows down. A displacement detector 18 is provided on the outer side of the bowl-shaped chute 14 so that the displacement when the gate plate 17 rotates can be detected. Since the displacement detection body 18 is attached to the rotation shaft 16, it is possible to detect the displacement when the gate plate 17 is rotated. The gate plate 17 is normally provided with a helical spring 20 between the fixing member 19 and the displacement detector 18 so that the channel 14 is normally closed and the channel 14 is opened when the mixed rice flows down. doing. In addition, a sensor main body 21 (for example, a magnet sensor, a magnetic proximity switch, etc.) that can detect the displacement of the displacement detector 18 is attached to the outside of the bowl-shaped chute 14.

  FIG. 4 is a block diagram illustrating an electrical connection relationship among the sensor, the control unit, and the drive unit. In FIG. 4, reference numeral 10 denotes a control unit that controls each unit, and is executed by, for example, a central processing unit (CPU), a first storage medium (RAM) that can read and write data as a work area of the CPU, and the CPU. A read-only second storage medium (ROM) for recording a basic program, a third storage medium comprising a hard disk device or a non-volatile flash memory device, and an input device / display device such as a touch panel. Is done.

  A lower limit sensor 12 a for detecting the lower limit value of the raw material tank 12 and a flow detection sensor 15 for detecting the flow of the mixed rice are connected to the control unit 10 via the input interface 22. In addition to such a sensor, a load current detection sensor 23 for detecting the load current of the detachment roll drive motor 26 that drives the detachment roll of the detachment unit 2, and further, the detachment unit 2 such as an acceleration sensor. A vibration detection sensor 24 that detects the vibration state of the rotation shaft when the unrolling roll rotates can be connected to the control unit 10 via the input interface 22.

  On the output side of the output interface 25, the detachment roll drive motor 26 of the detachment unit 2, the suction fan motor 27 that drives the suction fan 11 of the wind selection unit 3, and the masher motors 28 a to 28 a that drive various mashers. 28c, a swing sorting motor 29 that swings the sorting plate of the swing sorting unit 4 and a grain sorter motor 30 that rotationally drives the sorting cylinder of the grain sorting unit 5 are connected.

  Next, an example of the operation in the above configuration will be described based on the flowchart of FIG. FIG. 5 is a control flowchart when starting hulling.

  First, prior to the start of the hulling operation, it is detected that no grain is flowing in the hulling machine 1 (Yes in step S1). As shown in FIG. 3 (b), the grain does not flow before the operation in the mixed rice discharge path 14. Therefore, the displacement detection body 18 is drawn toward the sensor body 21 by the spring 20 of the flow detection sensor 15, and flows. The detection sensor 15 is turned on. When the flow detection sensor 15 is OFF detection (No in step S1), the process proceeds to step S7 described later.

  Next, the grain is supplied to the raw material tank 12 of the removal unit 2 (step S2). At this time, the lower limit sensor 12a transmits an ON signal indicating “there is a grain” in the raw material tank 12 (Yes in step S3). That is, when the flow detection sensor 15 is turned on and the lower limit sensor 12a is turned on, it is possible to perform the hulling work in the removal unit 2, so that the operator operates the control unit 10 to close the roll gap. Then, the shutter is opened and the hulling work is performed (step S4).

  The crushed rice that has passed through the removal unit 2 then passes through the wind selection unit 3. In the wind selection unit 3, the rice husk is removed by the suction air of the suction fan 11, and the mixed rice composed of rice bran and brown rice is discharged from the mixed rice discharge path 14. If the hulling operation is continued, as shown in FIG. 3 (a), the grain flows into the mixed rice discharge flow path 14, so that the gate plate 17 rotates against the spring 20 of the flow detection sensor 15, Accordingly, the displacement detection body 18 is separated from the sensor main body 21, and an off signal indicating that the flow detection sensor 15 “there is a grain flow” is transmitted (Yes in step S5). When the off signal is detected, it is determined that the hulling operation is normal, and the hulling operation is continued for a predetermined time (step S6).

  On the other hand, if the flow detection sensor 15 detects an ON signal indicating “no grain flow” in spite of starting the hulling operation (No in step S5), the timer is activated for a certain period of time (step S7). ), The hulling work is temporarily stopped (step S8). After pausing the hulling work, an error message is displayed on the touch panel 10a provided in the control unit 10. That is, despite the start of the hulling operation, because there is no detection of the grain to the mixed rice discharge flow path 14, there is no raw material residue in the raw material tank 12, the abnormality of the lower limit sensor 12a of the raw material tank 12, Or an abnormality such as an abnormality of the flow detection sensor 15 is considered. For this reason, a message “Please check each part” is displayed on the touch panel 10a of the control unit 10 (FIG. 7).

  After the error message is displayed on the touch panel 10a, each part is inspected. If there is no abnormality, the operator presses the alarm release button 10b (FIG. 7) to release the error message (step S10 in FIG. 5). Then, returning to step S4, the hulling operation is resumed.

  Next, the case of running out of raw materials will be described. FIG. 6 is a control flowchart in the case of out of raw materials. When the raw material runs out while continuing the hulling operation for a predetermined time in step S6 in FIG. 5, the lower limit sensor 12a detects an off signal (Yes in step S11 in FIG. 6). At this time, the hulling operation is temporarily stopped (step S12). Next, when the flow detection sensor 15 detects an off signal indicating “the grain flow is present” (Yes in step S13 in FIG. 6), the control unit 10 determines that the raw material is definitely out, and prompts the operator. It is urged to determine whether or not to continue the sliding operation (step S14 in FIG. 6). When the operator selects the end of the hulling work (No in step S14), the work is finished, and when the operator selects the continuation of the hulling work (Yes in step S14), (1) in FIG. ) To resume the hulling work.

Next, an embodiment using the vibration detection sensor 24 as a flow detection sensor will be described. In the vibration detection sensor 24, a detection unit equipped with an acceleration sensor or the like is fixed to the bearing of the rotary shaft of the removal roll of the removal unit 2. The control unit 10 includes a fast Fourier transform unit (FFT) for analyzing a vibration detection signal from the vibration detection sensor 24. As a result, as shown in FIG. 8, by vibration analysis, a signal before or after shedding that the raw material mash is not supplied to the detaching unit 2, and the material mash being supplied to the detaching unit 2 It can be easily identified from the sliding operation signal.

  An example of the operation when the vibration detection sensor 24 is used is that the flow detection sensor 15 in step S1 and step S5 in FIG. 5 and step S13 in FIG. .

  As described above, according to the present embodiment, the raw material tank 12 for temporarily storing the raw material, the lower limit sensor 12a for detecting the lower limit value of the raw material in the raw material tank 12, and the detaching unit 2 including a pair of detaching rolls. And the flow detection sensor 15 (or vibration detection sensor 24) for detecting the flow of the grain in the post-process than the detaching part 2 or the detaching part 2, and the lower limit sensor 12a detects a signal indicating no grain, and When the flow detection sensor 15 (or the vibration detection sensor 24) detects a signal indicating that there is a grain flow, it is determined that the raw material is running out during the hulling operation, and the hulling operation at the detaching unit 2 is stopped. Since the control unit 10 is provided, the control unit 10 determines that the raw material is running out during the hulling operation by double checking the lower limit sensor 12a and the flow detection sensor 15 (or the vibration detection sensor 24). Conventional sensor only In comparison with techniques, it can be reliably stop hulling work, have been, to reliably prevent the deformation or burning of husking rolls. Further, since the sensor itself is the detachment part or the flow detection sensor 15 (or the vibration detection sensor 24) that detects the grain flow in the later process than the detachment part, durability is also improved. In particular, when the lower limit sensor 12a detects a signal indicating no grain during the hulling operation and the flow detection sensor 15 (or vibration detection sensor 24) detects a signal indicating a grain flow, the control unit 10 Since it is definitely determined that the raw material is running out during the hulling operation, the reliability of automatic stopping of the hulling machine is improved, and it is possible to provide a derolling roll burnout prevention device suitable for practical use.

  The present invention can be applied to the field of a rice huller that is compactly arranged and configured, such as a mini rice center.

DESCRIPTION OF SYMBOLS 1 Grain preparation equipment 2 Hulling part 3 Wind selection part 4 Oscillation selection part 5 Grain selection part 6 Mixed rice cerealing machine 7 Mixed rice tank 8 Brown rice cerealing machine 9 Grain returning machine 10 Control part 11 Suction fan 12 Raw material tank 12a Lower limit sensor 13 Return tank 13a Upper limit sensor 14 Mixed rice discharge flow path 14a Bottom surface 15 Flow detection sensor 16 Rotating shaft 17 Gate plate 18 Displacement detector 19 Fixing member 20 Spiral spring 21 Sensor body 22 Input interface 23 Load current Detection sensor 24 Vibration detection sensor 25 Output interface 26 Detach roll drive motor 27 Suction fan motor 28 Graining machine motor 29 Oscillating sorting motor 30 Grain sorting machine motor

Claims (3)

A raw material tank for temporarily storing the raw material, a lower limit sensor for detecting the lower limit value of the raw material in the raw material tank, a detaching part comprising a pair of detaching rolls, and a post-process from the devolatilizing part or the devolatilizing part A flow detection sensor for detecting the grain flow of
When the lower limit sensor detects a signal with no grain, and the flow detection sensor detects a signal with a grain flow, it determines that the raw material is running out during the hulling operation, and and a control unit for stopping the hulling working in provided,
In the rice huller characterized in that the flow detection sensor is provided in a mixed rice discharge passage that communicates between a wind selection unit provided in a subsequent process of the detachment unit and a mixed rice cerealing machine. Burn-out prevention device for derolling rolls. The flow detection sensor includes a gate plate that receives the grains when flowing down the mixed rice discharge channel, and a displacement detector that detects a displacement when the gate plate rotates outside the mixed rice discharge channel. If, displacement detecting member displacement becomes formed by a sensor body for detecting the claims 1 burnout prevention device of husking rolls in rice huller according the. A raw material tank for temporarily storing the raw material, a lower limit sensor for detecting the lower limit value of the raw material in the raw material tank, a detaching part comprising a pair of detaching rolls, and a post-process from the devolatilizing part or the devolatilizing part A flow detection sensor for detecting the grain flow of
When the lower limit sensor detects a signal with no grain, and the flow detection sensor detects a signal with a grain flow, it determines that the raw material is running out during the hulling operation, and And a control unit for stopping the hulling work at
Said flow detection sensor, the burnout prevention device of husking rolls in rice huller, which is a vibration detection sensor which is fixed to the bearing of the rotating shaft of the husking rolls.

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