JP2009275983A - Grain drying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grain drying device capable of effectively preventing the interference of grain accumulated in a grain layer and a rotating disc. <P>SOLUTION: This grain drying device 10 includes a grain tank 14 communicating with a drying section 15 for drying a grain, and receiving the grain, the rotating disc 90 for uniformly distributing the grain to every part of the grain tank by a centrifugal force while rotating at an upper part and a central part in a plane view in the grain tank 14, a lower screw conveyor 64, an elevator 70 and an upper screw conveyor 76 for supplying the grain to the rotating disc 90 in the grain tank 14, a full level sensor 96 outputting a signal according to an accumulation height of a part positioned at a lower side in the direction of a gravitational force to a rotating shaft 88 of the rotating disc 90 of the grain K accumulated in the grain tank 14, and a control panel 100 for stopping the lower screw conveyor 64, the elevator 70 and the upper screw conveyor 76 when the full level signal corresponding the full of the grain K in the grain tank 14 is inputted from the full level sensor 96. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a grain drying apparatus that performs a drying process for drying grains.

A plurality of sensors for detecting the amount of grain stuck in the cereal tank are provided in the direction of gravity along the inner wall of the grain layer, and the remaining amount that can be placed is displayed based on the detection results of these sensors. A grain drying apparatus is known (see, for example, Patent Document 1). In the grain drying apparatus described in this document, among the plurality of sensors, the sensor disposed at the top is a rotating plate disposed in the upper part of the cereal tank and in the center part in plan view, and the grains deposited in the grain layer. In order to prevent this interference, the full sensor is provided corresponding to the full capacity of the grain layer.
JP 2006-17329 A

  However, in the conventional techniques as described above, since the full sensor is provided on the inner wall of the grain layer, depending on the condition of the grain accumulation in the grain tank, the interference between the grain accumulated in the grain layer and the rotating disk. There is concern that it cannot be prevented.

  In view of the above facts, an object of the present invention is to provide a grain drying apparatus capable of effectively preventing the interference between grains accumulated in a grain layer and a rotating disk.

  The grain drying apparatus according to the first aspect of the present invention is provided in a grain tank that contains grains and communicates with a drying section for drying the grains, and is provided at an upper part in the grain tank and in a central part in a plan view. A rotating disk for evenly distributing the grains to each part of the grain tank while rotating, a grain supply means for supplying the grains on the rotating disk in the grain tank, and depositing in the grain tank The grain detection means for outputting a signal corresponding to the height of the portion of the grain that is positioned below the rotation axis of the rotating disk with respect to the rotation axis of the rotating disk, and the rotation based on the signal from the grain detection means Control means for stopping the grain supply means when it is determined that the distance in the gravitational direction between the board and the grain deposited in the grain tank is equal to or less than a predetermined distance.

  In the grain drying apparatus according to claim 1, the grain accommodated in the grain tank is dried in the drying section. In the cereal tank, the cereal supplied from the cereal supply means onto the rotating disk is distributed substantially evenly by the centrifugal force accompanying the rotation of the rotating disk. Thereby, normally, grain is deposited substantially uniformly in each part in the grain tank.

  Here, in the present grain drying apparatus, the grain detection means includes a pile height (at the top of the grain) of the grain located in the lower side in the gravity direction with respect to the rotation axis of the rotary plate in the grain deposited in the grain tank. A signal corresponding to the position in the direction of gravity (a signal that changes continuously or a signal that changes before and after the threshold value) may be output. For this reason, in this grain drying apparatus, the position of the uppermost part of the grain directly under the rotating disk can be detected regardless of the state of grain accumulation. The control means stops the operation of the grain supply means when it is determined that the distance between the rotary disk and the grain deposited in the grain tank is equal to or less than a predetermined distance based on the signal from the grain detection means. It is possible to effectively prevent interference between the grains accumulated in the layer and the rotating disk.

  Thus, in the grain drying apparatus according to the first aspect, the interference between the grains deposited in the grain layer and the rotating disk can be effectively prevented.

  The grain drying apparatus according to a second aspect of the present invention is the grain drying apparatus according to the first aspect, wherein the grain detection means includes a portion disposed on the lower side in the direction of gravity with respect to the rotation axis of the rotating disk, A main body support that outputs a signal corresponding to the height of grain accumulated in the cereal tank, and a main body support that penetrates the rotary shaft so as to be relatively rotatable with respect to the rotating disk and has one end connected to the detection main body. Part.

  In the grain drying apparatus according to the second aspect, the main body support portion of the grain detection means penetrates the rotation shaft of the rotating disk so as to be relatively rotatable, so that at least a part of the detection main body portion is disposed below the rotation shaft. For this reason, it is possible to provide a grain detection means with a simple structure for detecting the height of grain accumulation immediately below the rotating disk.

  As described above, the grain drying apparatus according to the present invention can effectively prevent the interference between the grains accumulated in the grain layer and the rotating disk.

  The grain drying apparatus 10 which concerns on embodiment of this invention is demonstrated based on FIGS. 1-4. Note that an arrow UP appropriately shown in each drawing indicates an upper side in the gravity direction that coincides with the vertical direction of the apparatus, an arrow FR indicates a front side in the longitudinal direction of the apparatus, and an arrow RH indicates a right side in the horizontal direction of the apparatus (width direction). Shall.

  FIG. 2 shows a front sectional view of the circulation type grain drying apparatus 10 according to the embodiment of the present invention as seen from the front, and FIG. 3 shows the side when the grain drying apparatus 10 is seen from the left side. It is shown in a sectional view. As shown in this figure, the grain drying apparatus 10 includes a machine body 12 as a main body of the machine, and the machine body 12 is formed in a substantially rectangular parallelepiped box shape that is vertically high and long in the front-rear direction.

  The upper part in the machine body 12 is a cereal tank 14 that constitutes a storage chamber, and grains K such as straw are stored (accommodated) in the accumulation state, for example. In addition, a drying unit 15 for drying the grain is disposed in the lower part of the machine body 12.

  The drying unit 15 is provided with a pair of exhaust path partition walls 16, and each exhaust path partition wall 16 has air permeability. Each exhaust passage partition 16 is bridged between the front plate 12A and the rear plate 12B (see FIG. 3) of the airframe 12, and from the side plates 12C and 12D of the airframe 12 toward the center in the left-right direction of the airframe 12. Is inclined downward. Thereby, a pair of exhaust path partition 16 has comprised the substantially funnel shape by the front view as a whole.

  A wind tunnel plate 18 is provided inside the airframe 12 of the pair of exhaust passage bulkheads 16, and the wind tunnel plate 18 is formed of a breathable plate material in a substantially rhombic cylindrical shape in front view. It is configured. The wind tunnel plate 18 is bridged between the front plate 12 </ b> A and the rear plate 12 </ b> B of the airframe 12, and the interior of the wind tunnel plate 18 is a blower path 22. The front plate 12 </ b> A of the machine body 12 is formed with a rectangular outside air inlet 26 corresponding to the air passage 22, so that the outside air inlet 26 communicates with the air passage 22.

  Further, an air guide path partition 32 is provided between the upper part of the wind tunnel plate 18 and the upper part of each exhaust duct partition 16. Each of the air guide partition walls 32 is configured by being formed in a substantially rhombic cylindrical shape when viewed from the front by a plate material having air permeability. Due to this rhombus shape, the lower part of each air duct partition wall 32 is substantially parallel to each opposing exhaust channel partition wall 16 and substantially parallel to the opposing wind tunnel plate 18. Each air guide partition 32 is bridged between the front plate 12A and the rear plate 12B of the airframe 12, and the inside of each air guide partition 32 is an air guide 34.

  Further, the lower portion of the wind tunnel plate 18 is parallel to the respective exhaust passage partition walls 16 facing each other. As described above, in the drying unit 15 (lower part of the airframe 12), on the left and right sides of the wind tunnel plate 18, between the upper portion of the wind tunnel plate 18 and the wind guide partition wall 32, and the wind guide partition wall 32 and the exhaust air. A grain flow path 36 is formed between the lower part of the wind tunnel plate 18 and the lower part of the exhaust air path partition 16 via the upper part of the road partition 16. In these grain flow paths 36, the grain K stored in the grain tank 14 flows (flows).

  As shown in FIG. 2, a pair of tension flow plates 38 are provided below the pair of exhaust passage partition walls 16. Each stretch plate 38 is bridged between the front plate 12A and the rear plate 12B of the machine body 12. The pair of stretcher plates 38 are inclined downward from the side plates 12C and 12D of the airframe 12 toward the center in the left-right direction of the airframe 12, and have a substantially funnel shape as a whole when viewed from the front. . In addition, an air exhaust passage 40 is provided between each stretched flow plate 38 and each air exhaust passage partition 16.

  As shown in FIGS. 2 and 3, in the drying unit 15, a rectangular parallelepiped box-shaped furnace case 42 is provided on the left side portion of the front lower portion of the body 12. A plurality of slit-shaped outside air inlets 44 are formed in the front plate of the furnace case 42. Further, the furnace case 42 has its rear face plate partially opened so that the inside thereof communicates with the outside air inlet 26 described above. Further, the left side portion of the bottom plate of the furnace case 42 is open.

  Further, a rectangular box-like burner case 46 is provided on the left side immediately below the furnace case 42 in the lower front part of the body 12 constituting the drying unit 15. The upper surface plate of the burner case 46 is partially opened so as to communicate with the left open portion of the lower surface plate of the furnace case 42 described above. In the burner case 46, a burner 48 as hot air generating means is provided.

  On the other hand, a cuboid box-like blower mounting base 50 is provided at the lower rear portion of the airframe 12 constituting the drying unit 15. As shown in FIG. 2, the blower mounting base 50 communicates with the above-described exhaust passages 40 through openings 52 formed in the rear plate 12 </ b> B. A front end (suction side) of the blower 54 is attached to the rear surface of the blower mounting base 50, and one end of a flexible exhaust duct 56 is attached to the rear end (blowing side) of the blower 54. Yes.

  Thereby, in the drying unit 15, by driving the blower 54, normal temperature outside air (normal temperature air) is sucked into the air passage 22 from the outside air introduction port 44 through the furnace case 42 and the outside air inlet 26, Further, the air is sucked and blown into the blower 54 through the wind tunnel plate 18 (the vent hole), the respective grain downflow passages 36, the respective exhaust duct partition walls 16 (the vent holes), the respective exhaust passages 40, and the blower mounting base 50. And it is the structure exhausted through the exhaust duct 56. In addition, the outside air blown through the upper part of each grain flow path 36 passes through each air guide partition wall 32 and each air guide path 34.

  Then, the drying unit 15 of the grain drying apparatus 10 is configured so that the outside air introduced into the furnace case 42 from the outside air introduction port 44 is converted into hot air (dry air) heated to a higher temperature than the outside air by the burner 48. It is set as the structure by which the grain K in each grain flow path 36 is dried by sending air to the flow path 36.

  Between the lower ends of the grain flow paths 36, a cylindrical shutter drum 58 is provided as a feeding means constituting a flow means (moving means). As shown in FIG. 2, the shutter drum 58 substantially closes the lower end (merging portion) of each grain flow channel 36 and spans between the front plate 12 </ b> A and the rear plate 12 </ b> B of the machine body 12 to rotate around the axis. It is possible to rotate. As shown in FIG. 3, a pair of rectangular slits 60 elongated in the axial direction are formed on the outer periphery of the shutter drum 58, and one slit 60 is disposed on the front side of the outer periphery of the shutter drum 58. The other slit 60 is disposed on the rear side of the outer periphery of the shutter drum 58 and on the opposite side in the circumferential direction with respect to the one slit 60.

  Then, the shutter drum 58 rotates and each slit 60 faces (opens) the lower end of each grain flow path 36, so that the grain K in each grain flow path 36 flows into the shutter drum 58 via each slit 60. Further, when the shutter drum 58 is further rotated and the slits 60 are opened downward, the grain K flowing into the shutter drum 58 is discharged downward.

  Moreover, in the grain drying apparatus 10, the tension hopper 62 is each provided in the lower part of each side plate 12C, 12D of the body 12 so that opening and closing is possible. Thereby, in the grain drying apparatus 10, each grain hopper 62 is opened, so that the grain K can be tensioned (supplied) into the machine body 12. Here, the grain K discharged from the shutter drum 58 or the grain K stuck from the tension hopper 62 flows down between the lower ends of the tension flow plates 38.

  A lower screw conveyor 64 that constitutes a grain supply means is provided between the lower ends of the stretched flow plates 38. As shown in FIG. 3, the lower screw conveyor 64 has a rear end supported by the rear plate 12 </ b> B of the machine body 12 and a front end protruding forward of the front plate 12 </ b> A of the machine body 12. The lower screw conveyor 64 has a long bowl-shaped lower conveying bar 66, and the upper surface and the front surface of the lower conveying bar 66 outside the machine body 12 are closed.

  The lower conveyance rod 66 in the machine body 12 is communicated with the lower end portion of the air exhaust passage 40 in which the lower edge is formed by each of the stretcher flow plates 38 having a funnel shape. As a result, the grain K that has reached between the lower end portions of the tension flow plates 38 flows down into the lower conveying basket 66. In addition, a lower screw 68 is provided in the lower conveying basket 66, and the grain K that has flowed into the lower conveying basket 66 is conveyed forward by the lower screw 68.

  On the right side of the machine body 12, on the right side, an elevator (a masher) 70 constituting a grain supply means is erected, and the upper part of the elevator 70 protrudes upward from the upper surface plate 12 </ b> E of the machine body 12. An endless belt 72 is disposed in the elevator 70, and a plurality of buckets 74 are attached to the endless belt 72 at regular intervals. The lower end in the elevator 70 is communicated with the front end in the lower conveyance basket 66, and the grain K discharged from the lower screw conveyor 64 (the front end in the lower conveyance basket 66) and deposited on the lower end in the elevator 70 is an endless belt. In this configuration, the bucket 72 is lifted and conveyed by the bucket 74 to the upper end in the elevator 70.

  An upper screw conveyor 76 constituting a grain supply means is provided at the upper end of the machine body 12. The upper screw conveyor 76 has a rear end disposed immediately below the center (each center in the front-rear direction and the left-right direction) of the upper surface plate 12 </ b> E of the body 12, and the front end protrudes from the front plate 12 </ b> A of the body 12. The upper screw conveyor 76 has a long bowl-shaped upper conveying bar 78, and the lower surface of the rear end of the upper conveying bar 78 is open. The front end in the upper conveying basket 78 is communicated with the upper end in the elevator 70, and the grain K conveyed to the upper end in the elevator 70 flows down to the front end in the upper conveying basket 78.

  An upper screw 80 is provided in the upper conveying basket 78, and the grain K flowing down to the front end in the upper conveying basket 78 is conveyed backward by the upper screw 80. Further, the front end in the upper transport rod 78 can communicate with the discharge pipe 82, and when the front end in the upper transport rod 78 communicates with the discharge pipe 82, it flows down to the front end in the upper transport rod 78. The grain K is discharged from the grain drying apparatus 10 through the discharge pipe 82.

  Below the rear end of the upper screw conveyor 76, a leveler 84 that constitutes a flow means is rotatably provided, and the grain conveyed to the rear end of the upper screw conveyor 76 (the rear end in the upper conveying basket 78). As K flows down to the upper surface of the rotating disk 90 constituting the leveling machine 84, the K is evenly dispersed and distributed into the grain tank 14 by centrifugal force. Supplementing the leveling machine 84, as shown in FIG. 1, the leveling machine 84 includes a gear box 86 for converting the rotation of the upper screw 80 around the axis along the longitudinal direction into rotation around the axis along the direction of gravity. A rotating shaft 88 that is driven to rotate about an axis along the direction of gravity by the gear box 86, and a rotating disk 90 that is provided at the lower end of the rotating shaft 88 so as to rotate coaxially and integrally with the rotating shaft 88. It is configured as the main part.

  The turntable 90 is formed in a dish shape that opens upward in the direction of gravity. As a result, the leveling machine 84 rotates the rotating plate 90 about the rotation axis 88 while the grain K that has flowed down from the rear end of the upper screw conveyor 76 onto the rotating plate 90 by the centrifugal force as described above. It is configured to disperse and distribute evenly inside.

  Further, the grain drying apparatus 10 includes a grain sensor unit 92 for detecting the amount of grain contained in the grain tank 14. The grain sensor unit 92 includes a plurality of level sensors 94 arranged at regular intervals along the direction of gravity on the inner surface of the front plate 12 </ b> A of the machine body 12, and grain detection for detecting the full capacity of the grain K in the machine body 12. And a full sensor 96 as a means. Each level sensor 94 is, for example, a micro switch or the like, and receives a pressure from the grain K and outputs a predetermined signal (ON signal or the like). Thereby, the accommodation amount of the grain K in the grain tank 14 can be detected by the number of the level sensors 94 that output the ON signal.

  As shown in FIGS. 2 and 3, the full sensor 96 is disposed at the center of the cereal tank 14 (airframe 12) in plan view. In this embodiment, the full sensor 96 is provided so that at least a part thereof is located immediately below the axial center portion of the leveler 84. Specifically, as shown in FIG. 1, the full sensor 96 is inserted through a sensor main body 96 </ b> A as a detection main body portion and a through hole 88 </ b> A that penetrates the axial center portion of the rotary shaft 88 that constitutes the leveling machine 84. Cable 96B. The cable 96 </ b> B is supported by the body 12 above the rotation shaft 88. That is, the sensor main body 96A is supported by the machine body 12 via the cable 96B so as to be rotatable relative to the rotary shaft 88 (the rotary disk 90).

  As the full sensor 96, for example, the output signal is switched by contact with the grain K (including the change from signal OFF to ON, the same applies hereinafter), and the output signal is output when the distance from the grain K becomes a set value or less. A photoelectric switch to be switched and a distance sensor (for example, an ultrasonic sensor) that outputs a signal (analog signal or the like) corresponding to the distance from the grain K can be employed. Therefore, the full sensor 96, when the accommodation (deposition) amount of the grain K reaches the accommodation full amount of the cereal tank 14, signals corresponding to reaching the accommodation full amount of the cereal tank 14 (hereinafter, full). Is output to an operation panel 100 to be described later.

  In this embodiment, the cable 96 </ b> B is covered with a protective tube 98 and is protected against contact with the rotating shaft 88 and the rotating disk 90. The sensor main body 96 </ b> A may be supported by the machine body 12 through the protective tube 98 by being held at the tip of the protective tube 98. That is, the protective tube 98 may be used alone or together with the cable 96B to constitute the main body support in the present invention. In this case, it is also possible to arrange a bearing between the protective tube 98 and the rotating shaft 88. Conversely, the protective tube 98 may not be provided.

  Furthermore, the grain drying apparatus 10 includes an operation panel 100 as a control means. In this embodiment, as shown in FIG. 3, the operation panel 100 is disposed on the upper side of the furnace case 42 in the lower front portion of the body 12. The operation panel 100 is provided with various operation switches (not shown) such as a tension operation switch, a circulation operation switch, a drying operation switch, a discharge operation switch, a blower operation switch, and a stop switch. The grain drying apparatus 10 is controlled (operated, stopped, etc.) as described later by operating various operation switches of the operation panel 100.

  In the grain drying apparatus 10, the plurality of level sensors 94 and the full sensor 96 of the grain sensor unit 92 are electrically connected to the operation panel 100, respectively, so as to detect the amount of grain K in the grain tank 14. It has become. When the full signal is input from the full sensor 96, that is, the operation panel 100, that is, based on the input signal from the full sensor 96, the grain storage capacity in the grain tank 14 has reached the storage full capacity. If it is determined, the operation of stretching the grain drying apparatus 10 (the operation of the lower screw conveyor 64, the elevator 70, the upper screw conveyor 76, and the leveler 84) is stopped. The operation panel 100 is also configured to stop the tensioning operation of the grain drying device 10 even when an overload of the leveling machine 84 is detected.

  Next, the operation of the present embodiment will be described.

  In the grain drying apparatus 10 having the above-described configuration, when the tension operation switch of the operation panel 100 is operated, the lower screw conveyor 64, the elevator 70, the upper screw conveyor 76, and the leveler 84 are driven to perform the tension operation. Then, the tension hopper 62 is opened, and the harvested grain K is tensioned into the body 12. The grain K stretched into the machine body 12 is guided to the lower screw conveyor 64 by the tension flow plate 38, and passes through the elevator 70, the upper screw conveyor 76, and the leveling machine 84 from the lower screw conveyor 64 to the grain tank 14 and each It is conveyed (stored) to the grain flow path 36. This stretching operation (grain K stretching process) is automatically stopped by operating a stop switch of the operation panel 100 or when a full signal is input from the full sensor 96.

  For example, when it still takes time for the drying operation to be performed for convenience after the tension operation is completed, the shutter drum 58, the lower screw conveyor 64, the elevator 70, the upper screw are operated by operating the circulation operation switch of the operation panel 100. The conveyor 76 and the leveling machine 84 are driven and circulated (moved) (the grain K is circulated (moved)). Thereby, the grain K stored in the grain tank 14 is returned to the grain tank 14 via each grain flow path 36, the shutter drum 58, the lower screw conveyor 64, the elevator 70, the upper screw conveyor 76 and the leveling machine 84, Circulated in the grain drying apparatus 10. This circulating operation is stopped by operating the stop switch of the operation panel 100.

  When the drying operation switch of the operation panel 100 is operated, the shutter drum 58, the lower screw conveyor 64, the elevator 70, the upper screw conveyor 76, the leveling device 84, and the blower 54 are driven, and the burner 48 is ignited and dried. Operation (drying process of grain K) is started. In the drying process of the grain K in the drying operation, the grain K is circulated in the grain drying apparatus 10 as in the case of the circulation operation.

  Furthermore, by driving the blower 54, hot air is generated by the burner 48 from the outside air sucked and introduced into the furnace case 42 from the outside air inlet 44, and this hot air is passed through the outside air inlet 26, the air passage 22 and the wind tunnel plate 18. Grain K is dried by sucking and blowing air to each grain flow path 36 and absorbing the moisture of the grain K in each grain flow path 36. The hot air after absorbing the moisture of the grain K is sucked and blown to the blower 54 through (passes through) each exhaust passage partition 16, each exhaust passage 40 and the blower mounting base 50, and further, the exhaust duct 56. It is exhausted through.

  Further, when the grain K accumulated at the lower end in the elevator 70 is beaten by the bucket 74, the grain K is sampled by a moisture measuring device (not shown) by the action of the bucket 74 jumping up on the grain K. For this reason, the moisture value of the grain K sampled into the moisture measuring device is measured by the moisture measuring device, and the moisture value of the grain K is displayed on the operation panel 100.

  The drying operation is automatically stopped when the stop switch of the operation panel 100 is operated or when the grain K reaches the set moisture value. When the drying operation is stopped, the driving of the shutter drum 58 is stopped and the driving of the lower screw conveyor 64, the elevator 70, the upper screw conveyor 76, and the leveling machine 84 is continued as necessary. K is stored in the grain tank 14 and in each grain flow path 36.

  For example, when the drying operation is completed, when the discharge operation switch of the operation panel 100 is operated, the shutter drum 58, the lower screw conveyor 64, the elevator 70, the upper screw conveyor 76, and the leveler 84 are driven to perform the discharge operation. Furthermore, the front end in the upper conveying basket 78 is communicated with the discharge pipe 82, whereby the grain K is discharged from the grain drying device 10 through the discharge pipe 82. Further, the discharging operation (the discharging process of the grain K) is automatically stopped by operating the stop switch of the operation panel 100 or when the grain K is completely discharged from the grain drying apparatus 10.

  For example, when performing a tension operation, a circulation operation, or a discharge operation, when the air blowing operation switch of the operation panel 100 is operated, the air blower 54 is driven and the air blowing operation is performed (the grain K is blown). As a result, the ambient temperature outside air sucked and introduced into the furnace case 42 from the outside air inlet 44 is sucked and blown to each grain flow path 36 via the outside air inlet 26, the air passage 22 and the wind tunnel plate 18, and each grain The air is blown to the grain K in the downstream channel 36. The outside air after being blown to the grain K in each grain flow path 36 is sucked and blown to the blower 54 through (passes through) each exhaust path partition wall 16, each exhaust path 40 and the blower mount 50. Further, the air is exhausted through the exhaust duct 56. As a result, the grain K is prevented from being steamed and dust is discharged from the grain K. Further, the air blowing operation is stopped by operating the stop switch of the operation panel 100.

  Here, in the grain drying apparatus 10, the sensor main body 96 </ b> A of the full capacity sensor 96 is disposed directly below the shaft center part (rotating shaft 88) of the rotating disk 90 that constitutes the leveling machine 84, so Regardless of the state of accumulation of the stored grain K, the full operation (full quantity) of the grain K in the grain tank 14 can be detected and the tensioning operation can be stopped.

  Specifically, the grain K diffused and distributed by the leveling machine 84 usually has a deposition height at the peripheral part rather than the central part in the grain tank 14, as shown by a solid line or a broken line in FIG. The deposition situation becomes higher. In this case, for example, even when the full sensor 96 is provided on the front plate 12A of the airframe 12 as indicated by an imaginary line in FIG. It can be detected and the tension operation can be stopped. That is, the interference between the turntable 90 and the grain K can be prevented.

  On the other hand, for example, when the scattering of the grain K is hindered by the influence of impurities (such as straw scraps), it rarely protrudes upward at the center in the grain tank 14 as shown in FIG. There is a case where the grain K is deposited. In this case, for example, in the configuration according to the comparative example in which the full sensor 96 is provided on the front plate 12A of the airframe 12 as indicated by an imaginary line in FIG. 4B, the full sensor 96 detects the grain K, that is, the full product. Before the rotation, the turntable 90 and the grain K interfere with each other. In this case, the grain drying apparatus 10 detects the overload of the leveling machine 84 and automatically stops. However, in order to resume operation thereafter, it is necessary to take measures such as scraping the grains K around the turntable 90. I need it. Until this countermeasure is completed, it is not possible to move to the next operation (operation), and this countermeasure involves a work at a high place.

  On the other hand, in the grain drying apparatus 10, the full sensor 96 (sensor body 96A) is disposed directly below the rotating disk 90 as described above, and therefore the accumulation of either FIG. 4 (A) or FIG. 4 (B). Even in the situation, it is possible to reliably detect the grain K before the grain K interferes with the turntable 90 and stop the tensioning operation. Moreover, although illustration is abbreviate | omitted, in the comparative example which provided the full sensor 96 in the site | part lower than the turntable 90 in the front plate 12A of the airframe 12, in the case of the accumulation | stacking condition as shown to FIG. However, in the grain drying apparatus 10 in which the full quantity sensor 96 (sensor main body 96A) is arranged immediately below the rotating plate 90 as described above, Such a problem does not occur.

  In the grain drying apparatus 10, the cable 96 </ b> B of the full sensor 96 passes through the rotation shaft 88 of the leveling machine 84 and is supported on the upper surface plate 12 </ b> E side of the machine body 12. A configuration in which the full sensor 96 is provided without interfering with the grain K can be realized.

  Further, in the grain drying apparatus 10, since the sensor main body 96A is disposed below the turntable 90, the grain K radiated from the turntable 90 is prevented or significantly suppressed from hitting the sensor main body 96A. For this reason, it is possible to prevent residual grains from remaining in the full sensor 96 shape. In addition, the above arrangement prevents or significantly suppresses the occurrence of an obstacle between the full sensor 96 and the grain K during various operations of the grain drying apparatus 10. For this reason, it is possible to use a reflective optical sensor as the full sensor 96, and the degree of freedom in design increases.

  Further, in the configuration in which the full sensor 96 is provided on the upper surface plate 12E of the airframe 12 as in the comparative example described above, the full amount is taken into consideration in the variation of the grain K accumulation state indicated by the solid line and the broken line in FIG. Although it is necessary to determine the installation position of the sensor 96, in the grain drying apparatus 10, the position of the full sensor 96 is determined regardless of the accumulation state of the grain K. In other words, the variation of the accumulation state of the grain K is anticipated. Therefore, it is not necessary to consider the position of the full sensor 96, and the design work can be simplified.

  In the above-described embodiment, an example in which at least a part of the sensor main body 96A protrudes below the turntable 90 when the cable 96B of the full sensor 96 passes through the rotary shaft 88 is shown. For example, the sensor main body 96 </ b> A may be configured not to protrude downward in the gravity direction with respect to the rotary shaft 88 or the rotary disc 90 (to the rotary disc 90). Further, for example, instead of the full sensor 96, a reflection type light that is fixed to the upper surface plate 12 </ b> E of the machine body 12 and irradiates light toward the grain K through the inside of the rotary shaft 88 and receives reflected light from the grain K. It is possible to provide a full sensor as a sensor.

It is sectional drawing which shows arrangement | positioning of the full sensor which comprises the grain drying apparatus which concerns on embodiment of this invention. It is front sectional drawing of the grain drying apparatus which concerns on embodiment of this invention. It is a sectional side view of the grain drying apparatus which concerns on embodiment of this invention. It is a figure which shows typically the accumulation condition of the grain to the grain tank of the grain drying apparatus which concerns on embodiment of this invention, Comprising: (A) is a schematic sectional drawing which shows a 1st accumulation condition, (B) is 2nd. It is a schematic sectional drawing which shows the deposition condition of.

Explanation of symbols

10 Grain drying device 14 Grain tank 15 Drying section 64 Lower screw conveyor (grain supply means)
70 Elevator (grain supply means)
76 Upper screw conveyor (grain supply means)
88 Rotating shaft 90 Rotating disc 96 Full sensor (grain detection means)
96A Sensor body (Detection body)
96B cable (main body support)
100 Operation panel (control means)
K grain

Claims (2)

A cereal tank that contains the cereal and is in communication with a drying section for drying the cereal;
A rotating plate provided in the upper part of the cereal tank and in a central part in a plan view, for evenly distributing grains to each part of the cereal tank by centrifugal force while rotating;
Grain supply means for supplying grains on the rotating disc in the grain tank;
Grain detection means for outputting a signal corresponding to the accumulation height of the portion located below the rotation direction of the rotating disk in the grain accumulated in the cereal tank in the gravity direction;
Control means for stopping the grain supply means when it is determined based on a signal from the grain detection means that the distance in the gravitational direction between the rotating disk and the grain deposited in the grain tank is equal to or less than a predetermined distance. When,
Grain drying equipment with. The grain detection means includes
A detection main body that includes a portion arranged on the lower side in the direction of gravity with respect to the rotation axis of the rotating disk, and that outputs a signal corresponding to the height of grain in the cereal tank;
A main body support portion that penetrates the rotation shaft so as to be relatively rotatable with respect to the turntable, and has one end connected to the detection main body portion;
The grain drying apparatus according to claim 1, comprising:

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