JP2013230420A - Grain preparation equipment by charge system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deterioration of performance of a color sorting machine while reducing an operating cost, by suppressing dusts or bran from sticking to a grain flowing-down gutter by warming the grain flowing-down gutter through which sorted grain flows down only when the color sorting machine operates to a necessary temperature, in grain preparation equipment by a charge system having the color sorting machine.SOLUTION: Grain preparation equipment by a charge system has a raw material charging hopper (1), a color sorting machine (5) removing defective grain while flowing the grain down, a grain taking-out hopper (7) taking out good grain sorted by the color sorting machine (5), a coin mechanism (27) having a fee charging inlet (34), a color sorting operation switch (SW1), a warming means (18) warming grain flowing-down gutters (5c, ...) of the color sorting machine (5). The grain preparation equipment is further provided with a controller (41) warming and operating the warming means (18) relating to sorting action-starting operation of the color sorting machine (5).

Description

  The present invention relates to a fee-based grain preparation facility equipped with a color sorter.

  In the fee-type rice milling machine, it is equipped with a rice milling machine, a stone punching machine, a rice milling machine, and a color sorter, and performs color sorting to determine whether the white rice milled by the rice milling machine is defective or not. What isolate | separated from white rice and took out only good quality white rice to the accumulation tank is well-known (patent document 1).

  In addition, in a color sorter, a heater is provided below the grain slag to prevent dust and straw from adhering to the grain slag and to improve the sorting accuracy so that the grain normally flows. Yes (Patent Document 2).

JP 2004-130183 A JP 62-31605 A

  The color sorter of Patent Document 2 is provided with a heater below the grain sag, and this heater is always heated to maintain a predetermined temperature. When implemented in a fee-based grain preparation facility, There is a problem that the electricity bill for heating the heater becomes high, and the fee-based grain preparation equipment is unattended, so it is not desirable for safety to keep the heater at a high temperature.

  The present invention seeks to solve the above problem by keeping the heater of a color sorter at a temperature necessary for color sorting in a fee-based grain preparation facility.

In order to solve the above problems, the present invention has taken the following technical means.
The invention of claim 1 warms the charging hopper, the color sorter (5) that removes the defective grain while flowing down the grain, and the grain dropping basket (5c) of the color sorter (5). A heating means (18), a finished grain take-out hopper (7) for taking out good quality grains selected by the color sorter (5), a coin mech (27) provided with a charge inlet (34), A color sorting operation switch (SW1) for operating a color sorter machine (5), the coin mech (27) is provided with a coin sensor (SE1) for detecting an input usage fee, and the coin sensor (SE1) The heating means (18) is warmed by detecting the charging of the usage fee, the ON of the color selection operation switch (SW1), or the detection of the grain being charged into the charging hopper. A fee-based grain preparation facility.

  According to a second aspect of the present invention, in the first aspect of the invention, the heating means (18) is constituted by an electrothermal heater (18a), and the heater (18a) is heated by turning on / off the current. The heater (18a) is heated by detecting the input of the usage fee by the coin sensor (SE1), the ON of the color selection operation switch (SW1), or the detection that the grain has been input to the input hopper. It is characterized by doing.

  According to a third aspect of the present invention, in the second aspect of the invention, the heater (18a) can be heated in a low temperature heating state or a high temperature heating state by selective energization of a low voltage current or a high voltage current, and the heater During the non-sorting operation of the color sorter (5), (18a) is warmed to a low temperature state by energizing a low voltage current, and detection of the usage fee input by the coin sensor (SE1) or the color sorting operation switch (SW1) The heater (18a) is switched to energization with a high voltage current and heated to a high temperature state by detecting that the grain has been put into the feeding hopper.

  According to the first aspect of the present invention, the coin sensor (SE1) detects whether the usage fee has been input, detects that the color selection operation switch (SW1) is ON, or detects that the grain has been input to the input hopper. The warming operation of the temperature means (18) can warm and raise the kernel slag (5c) to a required temperature during the sorting operation of the color sorter (5). ) Can be prevented from adhering dust and soot. Further, it is possible to prevent the performance of the color sorter (5) from being lowered while reducing the operating cost.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, in addition to detecting the use fee input by the coin sensor (SE1) or turning on the color selection operation switch (SW1), The safety of the unmanned grain preparation facility can be ensured by heating the heater (18a) by detecting that it has been charged.

  According to the invention of claim 3, in addition to the effect of the invention of claim 2, the heater (18a) can be heated in a low temperature heating state or a high temperature heating state by selective energization of a low voltage current or a high voltage current. The heater (18a) is warmed to a low temperature state by energizing a low voltage current during the non-sorting operation of the color sorter (5), and the use fee is detected by the coin sensor (SE1) or the color. By switching on the sorting operation switch (SW1) or detecting that the grain has been thrown into the feeding hopper, the heater (18a) is switched to energization with a high voltage current and heated to a high temperature state, whereby a color sorting machine Even during the non-sorting operation of (5), the heater (18a) is energized with a low voltage current to keep the temperature at a predetermined low temperature, and quickly raised to the required high temperature at the start of the sorting operation of the color sorter (5). Can, even when the outside air temperature is low can be enhanced sorting accuracy of color sorter (5).

Process diagram of fee-based grain preparation equipment. The perspective view and side view of a color sorter. Process diagram of fee-based grain preparation equipment. The perspective view of a charge type grain preparation installation. The front view of a charge type grain preparation installation. The side view which abbreviate | omitted a part of charge type grain preparation equipment. The top view which abbreviate | omitted a part of charge type grain preparation equipment. Control block diagram.

Embodiments of the present invention will be described below with reference to the drawings.
First, a fee-based grain preparation facility equipped with a color sorter that is an embodiment of the present invention will be described based on the work process diagram of FIG.

  The fee-based grain preparation equipment includes a brown rice input hopper 1, a white rice input hopper 2, a brown rice elevator 3, a white rice elevator 4, a color sorter 5, and a selected grain for cultivating a quality-sorted good grain. It is composed of a grain elevator 6, a finished grain take-out hopper 7 for taking out good quality grains, and a defective product storage box 8 for storing color-selected defective grains.

  The brown rice charging hopper 1 and the white rice charging hopper 2 are arranged in parallel on the front side of the vending machine type box shown in FIG. 4 so that the brown rice or white rice brought by the user can be input. Further, the finished grain take-out hopper 7 is partially protruded from the front side of the box, and the hopper can be opened and closed by a grain take-out means (not shown) such as a shutter, and the finished grain stored in the hopper Is configured to be removable. Further, the brown rice elevator 3, the white rice elevator 4, the color sorter 5, the selected grain elevator 6 and the defective product storage box 8 are arranged inside the box, that is, in the machine room.

  Thus, the brown rice put into the brown rice throwing hopper 1 is sent to the brown rice elevator 3 by the feeding valve 1a, cerealed, and supplied to the color sorter 5 through the hopper 5a. The non-defective grain color-selected by the color sorter 5 is raised by the selected grain elevating machine 6 and taken out to the finished grain take-out hopper 7. Also, the color-selected defective grains are stored in the defective product storage box 8. Further, the white rice charged into the white rice input hopper 2 is sent to the white rice elevator 4 by the feeding valve 2a and cerealed, supplied to the color sorter 5 through the hopper 5a, and subjected to the selection processing and processed in the same manner as described above.

The color sorter 5 is configured as shown in FIG.
The color sorter 5 includes a hopper 5a provided at the top, a grain feeding means 5b provided at the bottom of the hopper 5a, a plurality of kernels 5c in which the grains are divided and flowed down, The color detecting means 5d, the defective grain removing means 5e, the non-defective grain flowing down hook 5f, the defective grain falling down drop 5g and the like provided respectively below the grain falling drop 5c.

  According to the above configuration, the grain stored in the hopper 5a is driven to rotate by the grain feeding means 5b by the motor, and a plurality of grains in the left and right direction are divided and supplied to a plurality of grains flowing down culverts 5c at a predetermined timing. Flow down. Next, in accordance with a detection command from the controller 41, detection light is emitted from the light emitting element of the color detecting means 5d to the flowing grain of each strip, and the amount of transmitted light that has passed through each detected grain is detected by the light receiving element and input to the controller 41. The transmitted light amount is compared with the determination reference value to determine whether it is a good grain or a defective grain. What is determined to be a defective grain is air blown from the pneumatic defective grain removing means 5e at a predetermined timing according to a defective grain removal command from the controller 41, and the defective grain is blown off to become a defective grain flow down 5g. Removed. In addition, the defective grain removing means 5e is not actuated on the non-defective grain and flows down as it is, and enters the non-defective grain flowing down basket 5f, and only the non-defective article is taken out.

  Moreover, the heating means 18 comprised, for example by the electric heater 18a is arrange | positioned in the bottom face of the grain flowing down basket 5c of the color sorter 5, and the groove part bottom part of the grain flowing down bowl 5c is heated to predetermined temperature. It is configured so as to suppress dust accumulation. Then, when the coin sensor SE1 detects the input of the usage fee of the color sorter 5, or when the color sorting operation switch SW1 is turned ON, or the brown rice loaded hopper 1 (or the white rice loaded hopper 2) is loaded with the brown rice. When the presence / absence sensor SE2 (or white rice insertion presence / absence sensor SE3) detects and a color selection work start signal is input to the controller 41, the heater 18a of the heating means 18 is first energized and heated by the color selection command of the controller 41. Then, the color sorter 5 is configured to perform a sorting operation.

  According to the said structure, before the white rice or brown rice reaches | attains the color sorter | selector 5, it can raise the grain falling straw 5c to required temperature, and suppresses adhesion of dust, straw, etc. to the grain falling straw 5c. In addition, it is possible to prevent a decrease in the performance of the color sorter 5 while reducing operating costs.

  Further, when the electric heater 18a of the heating means 18 is heated, it can be heated by selectively energizing a relatively low voltage current of, for example, 100 volts and a relatively high voltage current of, for example, 200 volts. When the color sorter 5 is not sorted according to the heating command from the controller 41, a low voltage current is applied to heat the color sorter 5 to a predetermined low temperature state. Alternatively, the color selection operation switch SW1 may be turned on, or the charged grains may be switched to a high voltage current energized state by detecting the grains that have been fed into the brown rice throwing hopper 1 (or the white rice throwing hopper 2).

  According to the said structure, the safety | security of unmanned grain preparation equipment can be ensured by hold | maintaining the heater 18a of the color sorter 5 to a predetermined low-temperature state at the time of non-sorting operation. In addition, a low voltage current is applied to the heater 18a even during the non-sorting operation of the color sorter 5 to maintain a predetermined low temperature state, and the heater 18a is switched to energization of a high voltage current at the start of the sorting operation of the color sorter 5. The white rice or brown rice can be quickly raised to the required temperature before reaching the color sorter 5, and the sorting accuracy of the color sorter 5 can be increased even when the outside air temperature is low.

  The color detection means 5d has a mode for discriminating white rice and defective grains, and a mode for discriminating brown rice and defective grains. The white rice is introduced into the white rice input hopper 2 and the white rice input presence sensor SE3 has a grain. If it discriminate | determines, the color detection means 5d will perform a color selection operation | work in the mode which discriminate | determines white rice and a defective grain. Similarly, when brown rice is put into the brown rice loading hopper 1 and the brown rice loading presence / absence sensor determines that SE2 has a grain, the color detecting means 5d performs a color selection operation in a mode for discriminating between the brown rice and the defective grain. With this configuration, the user does not need to select a mode for discriminating between white rice and bad grains and a mode for discriminating between brown rice and bad grains with a switch or the like, and the color selection operation is performed in an easy and erroneous mode. Can be prevented.

Next, the structure which used the rice mill equipment together with the color sorter as an example of a fee-based grain preparation equipment will be described.
This grain preparation equipment includes a brown rice input hopper 20 for rice milling, a stone remover 12, an elevator 13, a rice milling machine 14, a milled rice extraction hopper 15, and a rice bran suction fan 23 that removes rice bran from the rice milling machine 14. Etc. And it is comprised so that the supplied brown rice may be supplied to the stone remover 12 by the feeding valve 1a. Further, a part of the polished rice take-out hopper 15 is similarly protruded so that the user can take out the white rice by opening and closing the take-out port.

  According to the said structure, the brown rice thrown into the brown rice throwing hopper 1 for polished rice is drawn by the feed valve 1a, and is supplied to the stone remover 12. The brown rice supplied to the stone remover 12 is sorted by the swing sorting plate 12a, and large foreign matters such as stones are taken out from the upper outlet 12b and stored in the foreign matter storage box 12c. Moreover, the brown rice from which foreign matters such as stones have been removed is sent to the succeeding net sorting plate 12d, the brown rice is subjected to leakage sorting and sent to the lower part of the elevator 13, and large swarf flows down on the net sorting plate 12d. And stored in the trash can 12e. When the brown rice that is being sorted by the swing sorting plate 12a flows upward and is taken out from the upper outlet 12b, the lower portion of the elevator 13 is moved via the remaining rice flow path 12g by opening the discharge switching valve 12f. To be supplied.

  The brown rice that has been cerealed by the elevator 13 is supplied to a rice hopper 14 a of a rice mill 14, is fed by a feeding valve 14 b, is supplied to the rice mill 14, and is milled. It is. The white rice in the milled rice take-out hopper 15 is taken out by the user opening and closing the take-out port. The rice bran of the rice milling machine 14 is removed by the rice cake suction fan 23 and stored in a rice cake storage bag (not shown).

Next, the layout of the fee-based grain preparation facility will be described with reference to FIGS.
The fee-based grain preparation facility is divided into a rice mill storage 21b and a color sorting storage 21c, and the rice mill storage 21b includes a brown rice input hopper 1, a stone remover 12, A brown rice elevator 3, a rice mill 14, and a milled rice tank 15 are disposed.

  Then, the brown rice put into the brown rice feeding hopper 20 for the polished rice is supplied to the stone removing machine 12 by the brown rice feeding valve 1a to remove foreign matters such as stones. Next, the selected brown rice is sent to the brown rice lifting machine 3, cerealed and supplied to the rice mill 14, and the white rice polished by the rice mill 14 is taken out to the milled rice tank 15.

  Moreover, the brown rice input hopper 1, the white rice input hopper 2, the brown rice elevator 3, the white rice elevator 4, the color sorter 5, the selected grain elevator 28, and the non-defective grain are taken out in the color selection storage 21c. A finished grain take-out hopper 7, a defective product storage box 8 for storing color-selected defective grains, and the like are disposed.

  Thus, the brown rice fed into the brown rice charging hopper 1 is fed by the brown rice feeding valve 1a, cerealed by the brown rice elevator 3 and sent to the color sorter 5, and the color-sorted brown rice flows into the selected grain elevator 28. Then, the cereal is lifted and taken out to the finished grain take-out hopper 7.

  The white rice charged into the white rice charging hopper 2 is fed by the white rice feeding valve 2 a, cerealed by the white rice lifting machine 4, and supplied to the color sorter 5. The white rice that has been color-sorted by the color sorter 5 flows into the sorted grain elevator 28 and is cerealed and taken out to the finished grain take-out hopper 7. In addition, the defective grain color-sorted by the color sorter 5 is stored in a defective product storage box (not shown).

  Further, a switching valve 29 is provided in the white rice extraction part 14b of the rice mill 14 of the rice milling equipment storage 21b, and a white rice tank 23 and a white rice transfer passage 30 are provided side by side on the lower side of the white rice extraction part 14b. When the switching valve 29 is switched to the out-of-machine removal state, the white rice is taken out into the white rice tank 2, and when the switching valve 29 is switched to the transfer state to the color sorter 5, the white rice is taken out into the white rice transfer passage 30. The color sorter 5 is sent to the color sorter 5 via the white rice elevator 4 in the color sorter storage 21c.

  Moreover, as shown in FIG. 4, the operation panel 32 is provided in the front side wall of the rice mill equipment storage 21b. Above the operation panel 32, a rice mill color selection work procedure display unit 33 is provided, and the operation sequence is (1) “Purchase money”, (2) “Purch brown rice and white rice”, (3) “Press the operation button. ", (4)" Remove white rice "is displayed.

Next, the operation panel 32 will be described with reference to FIG.
The operation panel 32 is provided with a charge input port 34, a color selection work switch SW1, and a rice mill switch SW2 capable of selecting, for example, three kinds of milling degrees. A coin mech 27 with a coin sensor SE1 is provided below the operation panel 32, and the coin charge SE flowing down from the charge slot 34 is detected by the coin sensor SE1, and the amount and number of coins inserted are displayed.

Next, a control block configuration will be described with reference to FIG.
Various switches and sensors are connected to the input side of the controller 41. That is, the color selection work switch SW1, the rice milling switch SW2, the coin sensor SE1, the brown rice throwing presence / absence sensor SE2, and the white rice throwing presence / absence sensor SE3 are connected via an input interface.

  Further, on the output side of the controller 41, a feeding valve 1a of the brown rice charging hopper 1, a feeding valve 2a of the white rice charging hopper 2, a brown rice lifting machine 3, a white rice lifting machine 4, a color sorter 5, A stone punching machine 12, a rice milling machine 14, a straw suction fan 15, a heating means 18 (heater 18a), a selected grain elevator 28, and a switching valve 29 are connected.

Next, work control contents of the controller 41 will be described.
The coin sensor SE1 detects the introduction of the rice milling work fee and the color sorting work fee into the charge insertion port 34 of the coin mech 27, or the brown rice input presence / absence sensor for the brown rice input to the brown rice input hopper 1 of the rice mill equipment storage 21b. When SE2 is detected or the rice milling switch SW2 and the color sorting work switch SW1 are turned on, the heater 18a is first energized and heated based on the rice milling and color sorting work command of the controller 41, and then Each working unit is driven and starts working in the operation time according to the charged rice color selection fee. That is, the operation of the feeding valve 1a of the brown rice charging hopper 1, the brown rice lifting machine 3, the rice milling machine 14, the color sorting machine 5 and the selected grain lifting machine 28 is started, and the switching valve 29 of the white rice extraction part 14b of the rice milling machine 14 is operated. The state is switched to the state of transferring white rice to the color sorter 5 side, and the rice milling color sorting operation is executed while subtracting the operation time.

  Next, when the brown rice loading presence / absence sensor SE2 detects the absence of brown rice, the process proceeds to the finishing operation process of the rice milling color selection process. First, the energization of the heater 18a is stopped, and then the feeding valve 1a of the brown rice charging hopper 1 for a predetermined time. The brown rice lifting machine 3, the rice milling machine 14, the color sorter 5 and the selected grain lifting machine 28 are driven, and these residual grains are transferred to the lower side. And when predetermined time passes, these drive will be stopped and a work end operation process will be complete | finished.

  In the rice milling color sorting work operation control, based on the rice milling and color sorting work command of the controller 41, the heater 18a is first energized and heated, and the brown rice elevator 3, the rice milling machine 14, the color sorting machine 5 over a predetermined time. And the idle operation of the selected grain elevator 28 is executed, and the previous user's grain is taken out of the machine. Next, each working unit may be configured to be driven with an operation time corresponding to the charged rice color selection fee.

  If comprised in this way, the temperature of the heater 18a at the time of the sorting operation of the color sorter 5 can be raised and the sorting accuracy can be increased while preventing the mixing of the kernel of the current user and the kernel of the previous user. .

  In addition, when only the rice milling work fee is charged, and the brown rice loading into the brown rice loading hopper 1 of the rice mill equipment storage 21b is detected by the brown rice loading presence / absence sensor SE2, and the rice milling switch SW2 is turned on, the rice milling of the controller 41 is performed. Each working unit is driven with an operation time corresponding to the rice milling fee charged based on the work command. That is, the operation of the feeding valve 1a of the brown rice input hopper 1, the brown rice lifting machine 3, and the rice milling machine 14 is started, and the switching valve 29 of the white rice extraction part 14b of the rice milling machine 14 is switched to the state of extracting white rice to the white rice tank 23 side. Then, the rice milling operation is performed while the operation time is subtracted.

  Next, when the brown rice loading presence / absence sensor SE2 detects the absence of brown rice, the process proceeds to the operation of finishing the rice polishing operation, and the feeding valve 1a of the brown rice charging hopper 1, the brown rice lifting machine 3, and the rice milling machine 14 are driven for a predetermined time. The grain is transferred to the lower side, and when a predetermined time elapses, the driving is stopped and the work end operation process is ended. The user takes out white rice from the white rice hopper 2.

  Further, when only the color sorting work fee is charged, the brown rice thrown into the brown rice throwing hopper 1 of the color sorting storage 21c is detected by the brown rice thrown in / out sensor SE2, and only the color sorting work switch SW1 is turned on, Based on the color selection work command of the controller 41, the heater 18a is energized and heated, and each working unit is driven with an operation time corresponding to the supplied color selection fee. That is, the operation of the feeding valve 1a of the brown rice input hopper 1, the brown rice elevator 3, the color sorter 5 and the selected grain elevator 28 is started, and the color sorting operation is executed while the color sorting operation time is subtracted.

  Next, when the brown rice loading presence / absence sensor SE2 detects the absence of brown rice, the process shifts to an end operation process of the color sorting operation, the energization of the heater 18a is stopped, and the feeding valve 1a of the brown rice loading hopper 1, brown rice elevator 3 and color are stopped for a predetermined time. The sorter 5 is driven, these residual grains are transferred to the lower side, and when a predetermined time elapses, the driving is stopped and the work ending operation process is ended. The user takes out the selected brown rice from which the colored grains have been removed from the finished rice hopper 31.

  Further, when only the color sorting work fee is charged, the introduction of polished white rice into the white rice loading hopper 2 of the color sorting storage 21c is detected by the white rice loading presence / absence sensor SE3, and only the color sorting work switch SW1 is turned on. The heater 18a is energized and heated based on the color selection work command of the controller 41, and each working unit is driven with an operation time corresponding to the input color selection charge. That is, the operation of the feeding valve 2a of the white rice input hopper 2, the white rice elevator 4, the color sorter 5 and the selected grain elevator 28 is started, and the color sorting operation is performed while the color sorting operation time is subtracted.

  Next, when the white rice loading presence / absence sensor SE3 detects the absence of white rice, the process proceeds to a color sorting operation ending operation step, the energization of the heater 18a is stopped, and the feeding valve 2a of the white rice loading hopper 2, the white rice elevator 4 and the color are stopped for a predetermined time. The sorter 5 is driven, these residual grains are transferred to the lower side, and when a predetermined time elapses, the driving is stopped and the work end operation process is ended. The user takes out the sorted white rice from the finished rice hopper 31.

  Note that the heater 18a is energized and heated based on the color selection work command of the controller 41 described above. If the voltage current of 100 volts is switched to the voltage current of 200 volts based on the color selection work command of the controller 41, the heater 18a is energized. It may be replaced. Alternatively, the energization of the heater 18a may be stopped and the voltage / current of 200 volts may be switched to the voltage / current of 100 volts. That is, the fee-based grain preparation facility of the present embodiment is connected to both a 200-volt power supply and a 100-volt power supply, and is appropriately used depending on the apparatus.

DESCRIPTION OF SYMBOLS 1 Brown rice input hopper 5 Color sorter 5c Grain flow lowering 7 Grain extraction hopper 18 Heating means 18a Heater 27 Coinmech 34 Charge input 41 Controller SW1 Color selection operation switch SE2 Grain input presence sensor

Claims (3)

  An input hopper, a color sorter (5) that removes defective grains while allowing the grains to flow down, and a heating means (18) that heats the grain flow trough (5c) of the color sorter (5) The finished grain take-out hopper (7) for taking out the good quality grain selected by the color sorter (5), the coin mech (27) provided with the charge inlet (34), and the color sorter machine (5) And a coin sensor (SE1) for detecting an inserted usage fee in the coin mech (27), and detecting the insertion of the usage fee by the coin sensor (SE1) or A fee-based grain preparation facility characterized in that the heating means (18) is heated by detecting the ON of the color selection operation switch (SW1) or the detection of the grain being put into the charging hopper. . In invention of Claim 1, the said heating means (18) is comprised with an electrothermal heater (18a), and it comprises so that it may heat by turning on / off the electricity to this heater (18a),
The heater (18a) is heated by detecting the input of the usage fee by the coin sensor (SE1), the ON of the color selection operation switch (SW1), or the detection that the grain has been input to the input hopper. Features a fee-based grain preparation facility.   In the invention of claim 2, the heater (18a) can be heated in a low temperature heating state or a high temperature heating state by selective energization of a low voltage current or a high voltage current, and the heater (18a) is selected in the color selection. At the time of non-sorting operation of the machine (5), it is heated to a low temperature state by energizing a low voltage current, and detection of the usage fee is detected by the coin sensor (SE1) or the color selection operation switch (SW1) is turned ON A fee-based grain preparation facility, wherein the heater (18a) is switched to energization with a high voltage current and heated to a high temperature state by detecting that the grain has been introduced.

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