JP2012095564A - Grain discharging structure of combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inhibit occurrence of malfunction caused by the switch of the state of a shutter to the closed state with grains accumulating in a grain outlet.SOLUTION: The grain discharging structure of a combine harvester includes the shutter for opening/closing the grain outlet of a grain discharging device in the grain discharging device configured to switch the state to a grain discharge state for discharging grains stored in a grain tank or to a discharge stop state for stopping the discharge of grains. The grain discharging structure further includes a control means for controlling opening/closing of the shutter. When the control means detects the switch of the state of the grain discharging device to the discharge stop state, the control means determines whether a preset condition for closing the shutter is satisfied or not. If the condition for closing the shutter is satisfied, the state of the shutter is switched to the closed state; if the condition for closing the shutter is not satisfied, the shutter is retained in the opened state.

Description

  The present invention provides the grain discharge device configured to be switchable between a grain discharge state in which the grain stored in the grain tank is discharged outside the machine and a discharge stop state in which the grain discharge is stopped. It is related with the grain discharge structure of the combine provided with the shutter which opens and closes the grain discharge port of an apparatus.

  As the above-described combine grain discharging structure, the opening / closing shutter (shutter) opens when the grain discharging lever is discharged, and the opening / closing shutter closes when the grain discharging lever is stopped. Has been considered to be connected to the grain discharge lever (see, for example, Patent Document 1).

JP2003-111511 (paragraph number 0011)

  In the above configuration, even if the grain is retained at the grain outlet, the shutter is switched to the closed state when the grain stop lever is stopped. Due to the switching of the shutter to the closed state in a state where the grains are retained, problems such as damage to the grains and the shutter are likely to occur.

  An object of the present invention is to suppress the occurrence of problems caused by the shutter being switched to a closed state while the grains are retained at the grain outlet.

In the first problem solving means of the present invention,
The grain discharging device configured to be switchable between a grain discharging state for discharging the grain stored in the grain tank to the outside of the machine and a discharging stopping state for stopping the discharging of the grain, the kernel of the grain discharging device In the grain discharge structure of a combine equipped with a shutter for opening and closing the discharge port,
Control means for controlling the opening and closing of the shutter, and when the control means detects the switching of the grain discharging device to the discharging stop state, it is determined whether or not a predetermined condition for the shutter closing operation is satisfied. When the shutter closing operation condition is satisfied, the shutter is switched to the closed state, and when the shutter closing operation condition is not satisfied, the shutter is maintained in the open state. .

  According to this problem solving means, instead of simply switching the shutter to the closed state in accordance with the switching from the grain discharge state of the grain discharge device to the discharge stop state, the discharge state is stopped from the grain discharge state of the grain discharge device. Since the shutter is switched to the closed state when the condition for the shutter closing operation is established at the same time as the switching to, the condition for the shutter closing operation is set to the condition for eliminating the retention of the grain at the grain outlet. If this is done, the shutter will not switch to the closed state when the grain is retained at the grain outlet, and the shutter will be switched to the closed state when the retention of the grain at the grain outlet is resolved. It will be replaced.

  Therefore, it is possible to suppress the occurrence of problems such as damage to the grain and the shutter due to the shutter being switched to the closed state while the grain is retained at the grain outlet.

In the second problem solving means of the present invention, in the first problem solving means,
It has time measuring means to measure the passage of time,
The passage of a predetermined time after the control means detects the switching of the grain discharging device to the discharging stop state is set as the condition for the shutter closing operation.

  In this problem solving means, generally, when the grain discharging device is switched to the discharge stopped state, immediately after that, the operation of moving the grain outlet for changing the grain discharging location or the grain discharging Since the operation of moving the grain discharge port to return the exit to the predetermined work end position, etc., when a predetermined time has elapsed since the switching to the discharge stop state of the grain discharge device has been detected, the grain Considering that there is a high possibility that the stagnation of the grain at the grain outlet will be canceled due to the movement of the outlet, the control means will switch the grain discharging device to the discharge stop state. The passage of a predetermined time after detection is set as a condition for shutter closing operation, and the shutter is switched to the closed state after the passage of the predetermined time.

  In addition, since the control means detects the switching to the discharge stop state of the grain discharging device and the predetermined time elapses, there is a high possibility that the grain is retained at the grain discharging port. Is kept open.

  Therefore, it is possible to suppress the occurrence of problems such as damage to the grain and the shutter due to the shutter being switched to the closed state while the grain is retained at the grain outlet.

In the third problem solving means of the present invention, in the first problem solving means,
A grain sensor for detecting the retention of the grain in the vicinity of the grain outlet or the grain outlet;
It is set as a condition for the shutter closing operation that the grain sensor does not detect the stay of the grain.

  According to this problem solving means, when the control means detects the switching of the grain discharging device to the discharge stop state and the grain sensor does not detect the retention of the grain, the shutter is switched to the closed state, and the control means However, if the grain sensor detects the stay of the grain even if the switching to the discharge stop state of the grain discharging device is detected, the shutter is maintained in the open state.

  Therefore, it is possible to more surely suppress the possibility of problems such as damage to the grain and the shutter due to the shutter being switched to the closed state while the grain is retained at the grain outlet. it can.

According to a fourth problem solving means of the present invention, in the first problem solving means,
A timing means for measuring the passage of time and a grain sensor for detecting the retention of the grain in the vicinity of the grain outlet or the grain outlet,
The condition for the shutter closing operation is that the grain sensor has not detected the retention of the grain after a lapse of a predetermined time after the control means detects the switching of the grain discharging device to the discharge stop state. It is set.

  According to this problem solving means, the control means detects the change of the grain discharging apparatus to the discharge stopped state for a predetermined time, and the inertia of the grain discharging apparatus after the grain discharging apparatus is switched to the discharging stopped state. By setting the time it takes for the grain discharged from the grain outlet to disappear, the grain discharger is discharged from the grain outlet due to the inertia of the grain discharger after switching the grain discharger to the discharge stop state. Based on the detection information detected by the grain sensor at an appropriate time when there is no more grain to be removed, the control means will determine the retention of the grain in the vicinity of the grain outlet or the grain outlet .

  And in the discrimination result, when the grain does not stay near the grain outlet or the grain outlet, the shutter is switched to the closed state, and the grain is near the grain outlet or the grain outlet. When it stays, the shutter is kept open.

  Therefore, the kernel discharging device is discharged so that there is a possibility that the kernel or the shutter may be damaged due to the shutter being switched to the closed state when the kernel is retained at the kernel discharging port. It can suppress more reliably in the state which considered the grain discharged | emitted from a grain discharge port by the inertia of the grain discharge apparatus after switching to a stop state.

According to a fifth problem solving means of the present invention, in the third or fourth problem solving means,
Even if the control means determines that the conditions for the shutter closing operation are not satisfied, the shutter is switched from the state in which the grain sensor detects the retention of the grain to the state in which the shutter is not detected. Is maintained in an open state.

  According to this problem solving means, for example, in a bagging operation in which the grain discharged from the grain outlet is stored directly in the bag, the grain sensor becomes the grain outlet or the grain outlet when the grain is full. When the kernel discharging device is switched to the discharge stop state after detecting the retention of the kernel in the vicinity of the outlet, the shutter is kept open based on the detection of the kernel sensor at this time. After that, by replacing the stored straw bag with an empty straw bag, the shutter remains open even if the grain sensor no longer detects the retention of the grain at or near the grain outlet. Will do.

  Therefore, for example, in a bagging operation in which the grains discharged from the grain outlet are stored directly in the bag, the shutter is unnecessarily switched to the closed state every time the stored bag is replaced with an empty bag. The occurrence of defects can be prevented.

It is a whole right side view of a self-desorption combine. It is a whole top view of a self-detaching combine. It is a vertical right view of the principal part which shows the state which switched the shutter to the open attitude | position. It is a vertical right view of the principal part which shows the state which switched the shutter to the closed attitude | position. It is a vertical front view of the principal part which shows the state which switched the shutter to the open attitude | position. It is a vertical front view of the principal part which shows the state which switched the shutter to the closed attitude | position. It is a block diagram which shows a control structure. It is a flowchart of shutter closing control in the first embodiment. It is a flowchart of carry-out conveyor storage control. It is a flowchart of shutter closing control in 2nd Embodiment.

    [First Embodiment]

  Hereinafter, as an example of a mode for carrying out the present invention, a first embodiment in which a combine grain discharging structure according to the present invention is applied to a self-decomposing combine that is an example of a combine will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the self-removing combine exemplified in this embodiment forms a boarding operation unit 2 on the front right side of the traveling machine body 1, and a pair of left and right crawlers 3 on the lower part of the traveling machine body 1. It has been deployed. At the front part of the traveling machine body 2, the cutting and conveying device 4 that cuts and conveys the unharvested cereal grains to be harvested as the machine body travels is moved up and down in a state of extending from the traveling machine body 1 toward the front of the machine body. Equipped as possible. On the left side of the rear part of the traveling machine body 2, a threshing device 5 is provided which performs a handling process on the cereal after harvesting from the harvesting and conveying apparatus 4 and performs a sorting process on a processed product obtained by the handling process. On the right side of the rear part of the traveling machine body 2, a grain tank 6 for storing the grain obtained by the handling process and the sorting process in the threshing device 5 is mounted. The rear end portion of the threshing device 5 is connected with a waste straw shredding device 7 that can shred the waste straw that is the cereal meal after the threshing treatment and discharge it outside the machine. The grain tank 6 is equipped with a screw conveying type grain discharging device 8 that enables the grain stored in the grain tank 6 to be discharged out of the machine.

  The grain discharging device 8 transports the grains stored in the grain tank 6 to the rear of the bottom of the grain tank 6 by the transport conveyor 9 arranged in the front-rear direction at the bottom of the grain tank 6, and is transported by the transport conveyor 9. Unloading the grain by the lifting conveyor 10 connected to the rear end of the conveyor 9, and transferring the grain lifted by the lifting conveyor 10 to the upper end of the lifting conveyor 10 via the relay conveyor 11 It is configured to be carried out of the apparatus by the conveyor 12.

  The transport conveyor 9 has a front end portion extending forward from the grain tank 6 and a rearward end portion of the transport screw 13 that extends rearward from the grain tank 6 and a lifting conveyor 10. And a lower case 14 that enables communication connection with the device. A discharge clutch 16 that connects and disconnects transmission from the engine 15 provided on the right side of the front portion of the traveling machine body 1 to the grain discharging device 8 is connected to the front end of the conveying screw 13.

  The lifting conveyor 10 includes a lifting screw 18 having a lower end portion linked to a rear end portion of the conveying screw 13 via a bevel gear type transmission mechanism 17, and a lower end portion that is relatively rotatable to the upper end portion of the lower case 14. A fitted cylindrical lifting case 19 is provided.

  The relay conveyor 11 has a horizontal relay screw (not shown) whose one end is linked to the upper end of the lifting screw 18 via a bevel gear type transmission mechanism 20, and the lower end is relatively rotated to the upper end of the lifting case 19. A cylindrically-shaped first case 21 that is impossiblely connected, and a cylindrically-shaped second case 22 in which one end is fitted into the upper end of the first case 21 so as to be relatively rotatable around a relay screw. , And so on.

  As shown in FIGS. 1 to 6, the carry-out conveyor 12 has one end portion connected to the other end portion of the relay screw via a bevel gear transmission mechanism (not shown), and one end portion connected to the second end. A cylindrical carry-out case 24 connected to the other end of the case 22 so as not to be relatively rotatable is provided. A discharge case 25 having a rectangular cross section extending downward from the other end portion is connected to the other end portion of the carry-out case 24 so as to communicate with the rectangular grain discharge port 26. Is formed. Inside the discharge case 25 is equipped with a shutter 28 that opens and closes the grain discharge port 26 by swinging up and down with a horizontal support shaft 27 as a fulcrum.

  As shown in FIGS. 1, 2, and 7, the lower case 14 of the transfer conveyor 9 is rotated around the rotation center of the lifting screw 18 to rotate the lifting case 19, and the unloading conveyor 12 is moved to the lifting screw 18. The turning motor 29 is composed of an electric motor with a worm speed reducer that moves the grain outlet 26 in the turning direction to change the position of the grain outlet 26 in the turning direction by turning around the rotation center. And a turning sensor 30 comprising a multi-rotation type potentiometer for detecting the rotation angle of the lifting case 19 as the turning position of the carry-out conveyor 12.

  In addition, by moving the carry-out conveyor 12 up and down over the transporting conveyor 10 and the carry-out conveyor 12 with the relay screw of the relay conveyor 11 as a fulcrum, the grain discharge port 26 is moved in the height direction to remove the grain. An elevating cylinder 31 composed of a single-acting hydraulic cylinder that changes the height position of the outlet 26 is installed.

  As shown in FIGS. 3 to 7, the discharge case 25 of the carry-out conveyor 12 includes an opening / closing motor 32 including an electric motor with a worm speed reducer that opens and closes a shutter 28 with a lateral support shaft 27 as a fulcrum. By detecting the accumulation of the grains in the opening / closing sensor 33 composed of a single-rotation type potentiometer for detecting the opening / closing of the knives and the discharge boot 34 made of a soft transparent resin extending downward from the discharge case 25 A pressure-sensitive grain sensor 35 for detecting the retention of the grain in the vicinity of the outlet 26 or the grain outlet 26 is provided.

  The opening / closing motor 32 rotates the cam 36 that rotates integrally with the output shaft 32 </ b> A to change the acting posture of the cam 36 with respect to the shutter 28, thereby opening and closing the shutter 28 in the downwardly opened posture and the laterally closed posture. It is comprised so that it may be made. The open / close sensor 33 is configured to detect the opening / closing of the shutter 28 by the swing displacement of the detection arm 37 accompanying the rotation of the cam 36. The grain sensor 35 is equipped at the lower end of the support member 38 that extends downward from the discharge case 25 to the inside of the discharge boot 34. For example, when the grain is discharged to the truck bed, the grain discharged from the grain outlet 26 of the grain discharger 8 and deposited on the bed reaches the discharge boot 34 positioned above the bed. When the state reaches the state of accumulation inside the discharge boot 34 (the state where the grain stays in the vicinity of the grain discharge port 26 or the grain discharge port 26), the state of the grains accumulated inside the discharge boot 34 It is configured to detect from pressure. For example, when discharging the grain into the bag, the discharge boot 34 into which the grain discharged from the grain outlet 26 of the grain discharging device 8 and stored in the bag is inserted from the opening of the bag. When it reaches a state where it accumulates inside (a state in which the grain stays in the vicinity of the grain outlet 26 or the grain outlet 26), the grain is accumulated inside the discharge boot 34 with the state being full. It is comprised so that it may detect from the pressure of this.

  As shown in FIG. 7, the discharge clutch 16 is in a state of being transmitted from the engine 15 to the grain discharging device 8 by the operation of a clutch motor 39 composed of an electric motor with a worm speed reducer, and from the engine 15 to the grain discharging device 8. It is comprised so that it may switch to the cutting state which interrupts | blocks transmission of.

  As shown in FIG. 7, this self-removable combiner is equipped with an electronic control unit (hereinafter abbreviated as ECU) 40 as a control means configured by using a microcomputer having a CPU, an EEPROM and the like. . The ECU 40 is provided with time measuring means 40A for measuring the passage of time, and detection information such as the turning sensor 30, the open / close sensor 33, and the grain sensor 35 is input.

  The boarding operation unit 2 includes a momentary lift switch 41 that outputs to the ECU 40 an ascending command for raising and swinging the carry-out conveyor 12 while the pressing operation is continued. A momentary descent switch 42 that outputs a lowering command for lowering and swinging the conveyor 12 to the ECU 40, and a momentary output that outputs a left turning command for turning the unloading conveyor 12 to the ECU 40 while the pressing operation is continued. Type left turn switch 43, momentary type right turn switch 44 that outputs a right turn command to the ECU 40 to turn the carry-out conveyor 12 to the right while the pressing operation is continued, grain based on the pressing operation A momentary discharge switch that outputs to the ECU 40 a grain discharge command for switching the grain discharger 8 to the grain discharge state. 45, a momentary stop switch 46 that outputs to the ECU 40 a discharge stop command for switching the grain discharge device 8 to the discharge stop state based on the pressing operation, and the unloading conveyor 12 on the predetermined storage position based on the pressing operation A momentary-type storage switch 47 for outputting a storage command for moving to the ECU 40 is provided.

  The ECU 40 performs carry-out conveyor raising / lowering control for raising and lowering the carry-out conveyor 12 based on commands from the raising switch 41 and the lowering switch 42. In this carry-out conveyor raising / lowering control, when the raising command is outputted from the raising switch 41, the ECU 40 is a raising / lowering control valve comprising an electromagnetic control valve for controlling the flow of oil to the raising / lowering cylinder 31 while the raising command is outputted. 48 is switched to a supply state in which oil is supplied to the elevating cylinder 31, and the elevating cylinder 31 is operated to extend to swing the carry-out conveyor 12 upward. When the output of the lift command from the lift switch 41 is stopped, the lift control valve 48 is switched to a supply / discharge stop state in which the supply / discharge of oil to the lift cylinder 31 is stopped, and the lift cylinder 31 is stopped to operate. Stops the rising and swinging of the. When the lowering command is output from the lowering switch 42, the lifting control valve 48 is switched to a discharge state in which oil is discharged from the lifting cylinder 31 while the lowering command is output, thereby shortening the lifting cylinder 31. The carry-out conveyor 12 is swung down. When the output of the lowering command from the lowering switch 42 is stopped, the lifting control valve 48 is switched to the supply / discharge stop state and the lifting cylinder 31 is stopped to stop the swinging down of the carry-out conveyor 12.

  That is, by operating the raising switch 41 or the lowering switch 42, the carry-out conveyor 12 can be raised or lowered, and the grain outlet 26 of the grain discharging device 8 is changed to an arbitrary height position. be able to.

  The ECU 40 performs carry-out conveyor turning control for turning the carry-out conveyor 12 based on commands from the left turn switch 43 and the right turn switch 44. In this carry-out conveyor turning control, when the left turn command is output from the left turn switch 43, the ECU 40 rotates the transport case 19 of the transport conveyor 10 counterclockwise while the left turn command is output. Thus, the carry-out conveyor 12 is turned counterclockwise by rotating the turning motor 29 in the forward direction. When the output of the left turn command from the left turn switch 43 is stopped, the counterclockwise turn of the carry-out conveyor 12 is stopped by stopping the forward rotation operation of the turn motor 29. When a right turn command is output from the right turn switch 44, the turn motor 29 is rotated so that the lifting case 19 of the lifting conveyor 10 rotates clockwise while the right turn command is output. Is rotated in the reverse direction to rotate the carry-out conveyor 12 clockwise. When the output of the right turn command from the right turn switch 44 is stopped, the reverse rotation operation of the turn motor 29 is stopped to stop the right turn of the carry-out conveyor 12.

  That is, by operating the left turn switch 43 or the right turn switch 44, the carry-out conveyor 12 can be turned left or right, and the grain discharge port 26 of the grain discharge device 8 can be arbitrarily set in the turning direction. Can be changed to position.

  The ECU 40 performs grain discharge control for switching the grain discharge device 8 from the discharge stop state to the grain discharge state based on a command from the discharge switch 45. In this grain discharge control, when a grain discharge command is output from the discharge switch 45, the ECU 40 stores and turns the carry-out conveyor 12 in which the turn position of the carry-out conveyor 12 is preset based on the output from the turn sensor 30. It is determined whether or not a predetermined discharge stop region including the position (for example, a region on the right side of the front portion of the machine body including a storage turning position of the carry-out conveyor 12 and a region where the carry-out conveyor 12 crosses over the boarding operation unit 2). To do. In the discharge stop region, regardless of the grain discharge command from the discharge switch 45, the shutter 28 is maintained in the closed position without operating the opening / closing motor 32 and the clutch motor 39, and the discharge clutch 16 is maintained in the disconnected state. Then, the grain discharging device 8 is maintained in the discharge stopped state. If it is not the discharge stop region, it is determined whether or not the shutter 28 is in the open posture based on the output of the open / close sensor 33. If the shutter 28 is in the open posture, the clutch motor 39 is rotated forward to operate the discharge clutch 16. The grain discharging device 8 is switched from the discharging stop state to the grain discharging state by switching from the cut state to the entering state. If the shutter 28 is not in the open position, the opening / closing motor 32 is operated to swing the shutter 28 downward from the closed position to the open position. Then, when the opening / closing sensor 33 detects the switching of the shutter 28 to the open position by the operation of the opening / closing motor 32 at this time, the clutch motor 39 is rotated forward based on the output from the opening / closing sensor 33 at this time, and the discharge clutch By switching 16 from the cut state to the on state, the grain discharging device 8 is switched from the discharging stop state to the grain discharging state.

  That is, after the grain discharge port 26 of the grain discharge device 8 is positioned at an arbitrary carrying-out position excluding the discharge stop region, the grain discharge device 8 is discharged from the discharge stop state by operating the discharge switch 45. Can be switched to a state.

  The ECU 40 performs discharge stop control for switching the grain discharge device 8 from the grain discharge state to the discharge stop state based on a command from the stop switch 46. In this discharge stop control, when a discharge stop command is output from the stop switch 46, the ECU 40 reversely operates the clutch motor 39 to switch the discharge clutch 16 from the on state to the off state, thereby changing the grain discharge device 8 to the grain. While switching from the particle discharge state to the discharge stop state, the shutter closing control for switching the shutter 28 from the open posture to the closed posture is started. That is, the ECU 40 detects the switching from the grain discharge state to the discharge stop state of the grain discharge device 8 by outputting the discharge stop command from the stop switch 46.

  As shown in FIGS. 7 and 8, in the shutter closing control, the ECU 40 starts timing by the time measuring means 40A when the discharge clutch 16 is switched from the on state to the off state, and the discharge clutch 16 is changed from the on state to the off state. It is determined whether or not a predetermined time (for example, 2 seconds) has elapsed since switching [# 1]. When the predetermined time elapses, based on the output of the grain sensor 35 at the time when the predetermined time elapses, whether or not the grains are accumulated in the discharge boot 34 (the grain discharge port 26 or the grain discharge port). [# 2]. If no grain is deposited, the opening / closing motor 32 is operated to switch the shutter 28 from the open position to the closed position, and the shutter closing control is terminated [# 3]. If the grains are accumulated, the shutter 28 is maintained in the open posture without operating the opening / closing motor 32 [# 4]. And it is discriminate | determined whether the grain discharge command was output from the discharge switch 45, and when a grain discharge command is output from the discharge switch 45, it transfers to grain discharge control [# 5]. When the grain discharge command is not output from the discharge switch 45, it is determined whether or not the up command or the down command is output from the up switch 41 or the down switch 42 [# 6]. When an ascending command or a descending command is output from the ascending switch 41 or the descending switch 42, the carry-out conveyor ascending / descending control described above is executed, and the timing by the timing means 40A is started and the ascending command or descending command is output It is determined whether or not a predetermined time (for example, 2 seconds) has passed [# 7, # 8]. When a predetermined time has passed, based on the output of the grain sensor 35 at that time, whether or not the grain is accumulated in the discharge boot 34 (the grain outlet 26 or the grain in the vicinity of the grain outlet 26). [# 9] If the grains are not accumulated, the opening / closing motor 32 is operated to switch the shutter 28 from the open position to the closed position, thereby completing the shutter closing control. [# 3]. When the up command or the down command is not output from the up switch 41 or the down switch 42 in # 6, and when the grain is accumulated in # 9, the left turn switch 43 or the right turn switch 44 turns the left turn. It is determined whether a turn command or a right turn command is output [# 10]. When a left turn command or a right turn command is output from the left turn switch 43 or the right turn switch 44, the above-described carry-out conveyor turn control is executed, and the time measurement by the time measuring means 40A is started and the left turn command or It is determined whether or not a predetermined time (for example, 0.5 seconds) has elapsed since the right turn command was output [# 11, # 12]. When a predetermined time has passed, based on the output of the grain sensor 35 at that time, whether or not the grain is accumulated in the discharge boot 34 (the grain outlet 26 or the grain in the vicinity of the grain outlet 26). [# 13] If the grains are not accumulated, the opening / closing motor 32 is operated to switch the shutter 28 from the open position to the closed position, thereby completing the shutter closing control. [# 3]. When the left turn command or right turn command is not output from the left turn switch 43 or the right turn switch 44 in # 10, and when grains are accumulated in # 13, the storage command is sent from the storage switch 47. Is determined [# 14]. When a storage command is output from the storage switch 47, the carry-out conveyor storage control is executed and the shutter closing control is terminated [# 15]. When the storage command is not output from the storage switch 47, the process returns to # 5, the grain discharge command is output from the discharge switch 45, the storage command is output from the storage switch 47, or the shutter 28 is in the open posture. The control of # 5 to # 14 is repeated until the closed posture is switched from.

  As shown in FIGS. 7 and 9, in the carry-out conveyor storage control, the ECU 40 determines whether the carry-out conveyor 12 is based on the output of the upper limit sensor 49 including a limit switch that detects the arrival of the carry-out conveyor 12 at a preset upper limit position. It is determined whether or not the upper limit position has been reached [# 1]. If the upper limit position has not been reached, the operation of the lift control valve 48 is controlled based on the output of the upper limit sensor 49 and the lift cylinder 31 is extended to automatically raise the carry-out conveyor 12 until it reaches the upper limit position. Ascending control is performed [# 2]. If the carry-out conveyor 12 has reached the upper limit position, it is determined based on the output from the turning sensor 30 whether or not the carry-out conveyor 12 has reached a preset storage turning position [# 3]. If the storage turning position has not been reached, the automatic turning control for automatically turning the carry-out conveyor 12 to the storage turning position is performed by controlling the operation of the turning motor 29 based on the output from the turning sensor 30 [# 4]. A storage sensor 51 comprising a limit switch provided in a receiving device 50 (see FIGS. 1 and 2) configured to receive the carry-out conveyor 12 at a preset storage position when the carry-out conveyor 12 has reached the storage turning position. Based on the output, it is determined whether or not the carry-out conveyor 12 has reached the storage position [# 5]. If the storage position has not been reached, automatic lowering control for automatically lowering the carry-out conveyor 12 to the storage position by controlling the operation of the lift control valve 48 based on the output of the storage sensor 51 and shortening the lift cylinder 31 is performed. Perform [# 6]. When the carry-out conveyor 12 has reached the storage position, it is determined based on the output of the open / close sensor 33 whether or not the shutter 28 is in the closed position, and when the shutter 28 is in the closed position, the carry-out conveyor storage control is terminated [# 7]. If the shutter 28 is not in the closed position, the opening / closing motor 32 is operated to switch the shutter 28 from the open position to the closed position, and then the carry-out conveyor storage control is terminated [# 8].

  That is, in this grain discharge structure, the shutter 28 is immediately changed from the open position to the closed position in accordance with the switching from the engaged state of the discharge clutch 16 to the cut state (from the grain discharge state of the grain discharge device 8 to the discharge stop state). Rather than switching, a state where grains are accumulated inside the discharge boot 34 as the discharge clutch 16 is switched from an on state to a cut state (a state where the grains are retained at the grain outlet 26) ) Is automatically determined, and the shutter 28 is automatically switched from the open position to the closed position when the accumulation of the grains in the discharge boot 34 is resolved. Therefore, the grain is retained at the grain outlet 26 while the shutter 28 is automatically switched from the open position to the closed position by switching from the on state to the off state of the discharge clutch 16. Due to switching the shutter 28 from the open position to the closed position in the state, the grains staying at the grain discharge port 26 are returned to the inside of the carry-out conveyor 12, and the returned grains are discharged. It is possible to prevent the occurrence of a problem of falling down from the gap between the grain outlet 26 and the shutter 28 or a problem of damaging the grain or the shutter 28 during traveling after the work is completed.

  Further, after a predetermined time has elapsed since the discharge clutch 16 was switched to the disengaged state, the accumulation of the grains (the grain discharge port 26 or the grain discharge port) inside the discharge boot 34 based on the output of the grain sensor 35. The grain discharged from the grain outlet 26 due to the inertia of the grain discharging device 8 after the discharge clutch 16 is switched to the disengaged state. Therefore, it is possible to discriminate the accumulation of the grain inside the discharge boot 34, and thus it is possible to more reliably prevent the occurrence of the above-mentioned problems.

  Moreover, after maintaining the shutter 28 in the open posture based on the output of the grain sensor 35 at the time when a predetermined time has elapsed, at least the operation of the up switch 41, the operation of the down switch 42, and the operation of the left turn switch 43 Unless the operation of the right turn switch 44 and the operation of the storage switch 47 is performed, the grain sensor 35 does not detect from the state of detecting the accumulation of the grain inside the discharge boot 34. Even if the shutter 28 is switched to the state, the shutter 28 does not switch from the open position to the closed position. For example, in a bagging operation in which the grains discharged from the grain outlet 26 are directly stored in the bag, the grains After the sensor 35 detects the accumulation of the grain inside the discharge boot 34, the stop switch 46 is operated to switch the grain discharge device 8 from the discharge stop state to the grain discharge state. Since the grain sensor 35 detects the accumulation of the grain in the discharge boot 34, the shutter 28 maintains the open posture, and then the grain is replaced by replacing the stored straw bag with an empty straw bag. Even if the sensor 35 no longer detects the accumulation of grains inside the discharge boot 34, the shutter 28 does not switch from the open position to the closed position, so that the stored bag is replaced with an empty bag. It is possible to prevent the occurrence of a problem that the shutter 28 is unnecessarily switched to the closed position each time it is performed.

  In addition, for example, when discharging the grain to a truck bed or the like, when the previous discharge target part is full and the grain discharge port 26 is moved to the next discharge target part, the previous discharge target Even if the grain accumulated at the location reaches the discharge boot 34 and the grain sensor 35 detects the accumulation of the grain inside the discharge boot 34, it rises to move the grain outlet 26. By operating the switch 41, the lowering switch 42, the left turning switch 43, or the right turning switch 44, the carry-out conveyor 12 is moved up and down or turned, whereby the grain sensor 35 is discharged to the discharge boot 34. When it stops detecting the accumulation of the grain inside the shutter 28, the shutter 28 is switched from the open position to the closed position, so when moving the grain discharge port 26 from the previous discharge target position to the next discharge target position It is possible to prevent the kernels spill falling defect occurs from the grain discharge port 26.

  When the storage switch 47 is operated, the shutter 28 is always switched to the closed position when the carry-out conveyor 12 reaches the storage position. Therefore, when the carry-out conveyor 12 is moved to the storage position, the grain is discharged. It is possible to prevent the occurrence of a problem that the grain spills from the outlet 26, and the entry from the grain outlet 26 of a small animal such as a rat when the carry-out conveyor 12 is positioned in the storage position and stored in a barn or the like. Can be prevented.

    [Second Embodiment]

  Hereinafter, as an example of an embodiment for carrying out the present invention, a second embodiment in which the combine grain discharging structure according to the present invention is applied to a self-decomposing combine that is an example of a combine will be described with reference to the drawings. Since the second embodiment differs from the first embodiment only in the control operation of the ECU 40 in the shutter closing control, only the control operation of the ECU 40 in the shutter closing control will be described. Omitted.

  As shown in FIGS. 7 and 10, in the shutter closing control, the ECU 40 starts timing by the time measuring means 40 </ b> A while switching from the engaged state of the discharge clutch 16 to the disconnected state, and changes the discharge clutch 16 from the engaged state to the disconnected state. It is determined whether or not a predetermined time (for example, 2 seconds) has elapsed since switching [# 1]. When the predetermined time elapses, based on the output of the grain sensor 35 at the time when the predetermined time elapses, whether or not the grains are accumulated in the discharge boot 34 (the grain discharge port 26 or the grain discharge port). [# 2]. If no grain is deposited, the opening / closing motor 32 is operated to switch the shutter 28 from the open position to the closed position, and the shutter closing control is terminated [# 3]. If the grains are accumulated, the shutter 28 is maintained in the open posture without operating the opening / closing motor 32 [# 4]. And it is discriminate | determined whether the grain discharge command was output from the discharge switch 45, and when a grain discharge command is output from the discharge switch 45, it transfers to grain discharge control [# 5]. When the grain discharge command is not output from the discharge switch 45, it is determined whether or not the up command or the down command is output from the up switch 41 or the down switch 42 [# 6]. When the up command or the down command is output from the up switch 41 or the down switch 42, the above-described carry-out conveyor up / down control is executed, and thereafter, the output of the up command or the down command from the up switch 41 or the down switch 42 is stopped. Then, the carry-out conveyor lifting control is terminated [# 7 to # 9]. Then, based on the output of the grain sensor 35 at the time when the carry-out conveyor lifting / lowering control is finished, whether or not the grain is accumulated in the discharge boot 34 (the grain outlet 26 or the grain outlet 26). [# 10] If the grain is not accumulated, the opening / closing motor 32 is operated to switch the shutter 28 from the open position to the closed position, thereby closing the shutter. [# 3]. When the up command or the down command is not output from the up switch 41 or the down switch 42 in # 6, and when the grain is accumulated in # 10, the left turn switch 43 or the right turn switch 44 turns the left turn. It is determined whether a turn command or a right turn command is output [# 11]. When the left turn command or the right turn command is output from the left turn switch 43 or the right turn switch 44, the above-described carry-out conveyor turn control is executed, and then the left turn switch 43 or the right turn switch 44 When the output of the left turn command or the right turn command is stopped, the carry-out conveyor turn control is terminated [# 12 to # 14]. Then, based on the output of the grain sensor 35 at the time when the carry-out conveyor turning control is finished, whether or not the grain is accumulated in the discharge boot 34 (the grain outlet 26 or the grain outlet 26). [# 15] If the grain is not accumulated, the opening / closing motor 32 is operated to switch the shutter 28 from the open position to the closed position, thereby closing the shutter. [# 3]. When a left turn command or a right turn command is not output from the left turn switch 43 or the right turn switch 44 in # 11, and when grains are accumulated in # 15, a storage command is sent from the storage switch 47. Is determined [# 16]. When a storage command is output from the storage switch 47, the carry-out conveyor storage control is executed and the shutter closing control is terminated [# 17]. When the storage command is not output from the storage switch 47, the process returns to # 5, the grain discharge command is output from the discharge switch 45, the storage command is output from the storage switch 47, or the shutter 28 is in the open posture. The control of # 5 to # 16 is repeated until the closed posture is switched from.

    [Another embodiment]

[1] As long as the combine is provided with the grain discharging device 8, it may be a normal type (whole-throw-in type) combine that is configured to input the whole harvested culm into the threshing device 5. .

[2] The boarding operation unit 2 is provided with a discharge clutch lever, and this discharge clutch lever is mechanically linked to the discharge clutch 16 with a connecting wire or the like, and the discharge clutch lever is operated in place of the discharge switch 45 and the stop switch 46. A lever sensor that detects the position or a clutch sensor that detects the operating state of the discharge clutch, etc., and the control means 40 is in a discharge stop state of the grain discharge device 8 based on detection by the lever sensor or the clutch sensor. You may comprise so that the switch to may be detected.

[3] Instead of the configuration in which the grain discharging device 8 is driven by the power from the engine 15 via the discharge clutch 16, the grain discharging device 8 is an actuator for driving the grain discharging device such as an electric motor or a hydraulic motor. And the control means 40 is configured to control the operation of the actuator for driving the grain discharging device based on the grain discharging command from the discharging switch 45 and the discharging stop command from the stop switch 46. May be. In this configuration, the control means 40 detects the switching of the grain discharging apparatus 8 to the discharge stop state based on the discharge stop command from the stop switch 46.

[4] A grain discharging sensor that directly detects whether or not the grain discharging apparatus 8 is in an operating state from the operating state of the grain discharging apparatus 8, and control means based on the detection of the grain discharging sensor You may comprise so that 40 may detect the switching to the discharge | emission stop state of the grain discharge apparatus 8. FIG.

[5] In the shutter closing control, the control is not performed until the predetermined time elapses after the control unit 40 detects the switching of the grain discharging device 8 to the discharge stop state without including the grain sensor 35. The unit 40 determines that the conditions for the shutter closing operation are not satisfied, maintains the shutter 28 in the open state, and a predetermined time after the control unit 40 detects the switching of the grain discharging device 8 to the discharging stop state. When the time elapses, the control unit 40 may determine that the conditions for the shutter closing operation are satisfied and switch the shutter 28 to the closed state.

[6] In the shutter closing control, the timing sensor 40A is not provided, and even if the control means 40 detects the switching of the grain discharging device 8 to the discharge stop state, the grain sensor 35 does not stop the grain outlet 26 or the grain. When the stay of the grain in the vicinity of the grain outlet 26 is detected, the control means 40 determines that the condition for the shutter closing operation is not satisfied, maintains the shutter 28 in the open state, and the control means When 40 detects the switching of the grain discharging device 8 to the discharge stop state and the grain sensor 35 does not detect the stay of the grain in the vicinity of the grain outlet 26 or the grain outlet 26, The control unit 40 may determine that the shutter closing operation condition is satisfied and switch the shutter 28 to the closed state.

[7] In the shutter closing control, a manual command means for closing state switching including, for example, a momentary switch for instructing the control means 40 to switch the shutter 28 to the closed state is provided, and the control means 40 includes the grain discharging device. If the closing command is not output from the manual command means even when the switching to the discharge stop state of 8 is detected, the control means 40 determines that the conditions for the shutter closing operation are not satisfied, and moves the shutter 28. When the control means 40 detects the switching of the grain discharging device 8 to the discharge stop state and a close command is output from the manual command means, the control means 40 keeps the shutter closing operation condition. It may be configured that the shutter 28 is switched to the closed state when it is determined that the above has been established.

[8] In the shutter closing control, there is provided a manual command means for switching the open / closed state, such as a momentary switch for instructing the control means 40 to switch the shutter 28 between the open state and the closed state. When the output of the closing command from the manual command means is detected after detecting the switching of the grain discharging device 8 to the discharge stop state, the grain sensor 35 is in the vicinity of the grain outlet 26 or the grain outlet 26. It may be configured to determine whether or not the retention of the grain is detected (determination as to whether or not the condition for the shutter closing operation is satisfied).

[9] In the shutter closing control, there is provided a manual command means for switching the open / closed state, such as a momentary switch, for instructing the control means 40 to switch the shutter 28 between the open state and the closed state. When detecting the output of the closing command from the expression command means and detecting the switching to the discharge stop state of the grain discharging device 8, the grain sensor 35 is in the vicinity of the grain outlet 26 or the grain outlet 26. It is configured to determine whether or not stagnation of the grain is detected (determination of whether or not the condition for the shutter closing operation is satisfied), and the grain discharging device 8 is switched to the discharge stop state. The switching of the shutter 28 to the closed state by the closing command from the manual command means is restrained not only when the shutter is not detected but also when the conditions for the shutter closing operation are not satisfied. It may be configured to.

[10] The configuration of the shutter 28 can be variously modified. For example, the shutter 28 may be configured to open and close the grain outlet 26 by sliding, or the grain outlet 26 may be partially configured. It may be configured to open and close.

[11] An optical sensor or the like may be employed as the grain sensor 35. Further, the grain sensor 35 may be provided inside the grain outlet 26.

[12] The grain discharging device 8 may be configured such that the carry-out conveyor 12 can be extended and contracted. Moreover, what was comprised so that a grain might be discharged | emitted out of an apparatus using a bucket conveyor or a belt conveyor etc. may be used.

  The grain discharge structure for a combine according to the present invention can be applied to a self-removing combine and a normal combine having a grain discharging device.

6 Grain Tank 8 Grain Discharge Device 26 Grain Discharge Port 28 Shutter 35 Grain Sensor 40 Control Means 40A Timekeeping Means

Claims (5)

The grain discharging device configured to be switchable between a grain discharging state for discharging the grain stored in the grain tank to the outside of the machine and a discharging stopping state for stopping the discharging of the grain, the kernel of the grain discharging device In the grain discharge structure of a combine equipped with a shutter for opening and closing the discharge port,
Control means for controlling the opening and closing of the shutter, and when the control means detects the switching of the grain discharging device to the discharging stop state, it is determined whether or not a predetermined condition for the shutter closing operation is satisfied. When the shutter closing operation condition is satisfied, the shutter is switched to the closed state, and when the shutter closing operation condition is not satisfied, the shutter is maintained in the open state. Combined grain discharge structure. It has time measuring means to measure the passage of time,
2. The combine grain discharge according to claim 1, wherein the passage of a predetermined time after the control means detects the switching of the grain discharge device to the discharge stop state is set as a condition for the shutter closing operation. Construction. A grain sensor for detecting the retention of the grain in the vicinity of the grain outlet or the grain outlet;
The combine grain discharging structure according to claim 1, wherein the condition that the grain sensor does not detect the stay of the grain is set as a condition for the shutter closing operation. A timing means for measuring the passage of time and a grain sensor for detecting the retention of the grain in the vicinity of the grain outlet or the grain outlet,
The condition for the shutter closing operation is that the grain sensor has not detected the retention of the grain after a lapse of a predetermined time after the control means detects the switching of the grain discharging device to the discharge stop state. The combine grain discharging structure according to claim 1, which is set.   Even if the control means determines that the conditions for the shutter closing operation are not satisfied, the shutter is switched from the state in which the grain sensor detects the retention of the grain to the state in which the shutter is not detected. The grain discharging structure for a combine according to claim 3 or 4, wherein the structure is configured to maintain the open state.

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