Work vehicle

Abstract

To solve a conventional problem of a damage of a member of a discharge auger, sun visor, and an operation part by causing the discharge auger and the sun visor coming into contact with a component member by a wrong lowering operation of the discharge auger due to an erroneous operation.SOLUTION: A work vehicle includes a harvesting device 4, a separation device 3, a collecting device 5, an operation part 6, a discharge auger 7, and a covering member 10 covering an upper part of the operation part 6. The discharge auger 7 is configured to be rotatable in a right-left direction about a first rotational shaft 11 in a vertical direction, and configured to be vertically rotatable about a second rotational shaft 12 in a right-left direction (horizontal shaft shape). A lowering restriction switch 15 is provided at one of or the other of right-left sides in a right-left rotational range of the discharge auger 7. When the discharge auger 7 rotates to be in contact with either one of the lowering restriction switch 15, the lowering of the discharge auger 7 is restricted, When the discharge auger 7 is rotates to be in contact with either one of the lowering restriction switch 15 in a state where the lowering of the discharge auger 7 is restricted, the lowering restriction of the discharge auger 7 is canceled.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a work vehicle.

Background Art

[0002] Conventionally, a configuration in which a meter panel is provided on the upper surface of the front panel of the control unit of a work vehicle (combine) is known (Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above-known example, when not in use such as during harvesting work, the discharge auger is located at substantially the same height as the upper surfaces of the separation device, the grain tank, and the visor frame, etc. Therefore, when discharging the harvested product, the discharge auger needs to be rotated across above the visor cover, the sun visor, or the operator in the driver's seat to the discharge position. However, if the upward rotation amount of the discharge auger is small, or if the discharge auger is lowered above the sun visor due to an incorrect operation, the discharge auger may contact the sun visor or its components, resulting in problems such as damage to the unloading auger, the sun visor, or the components of the control unit. The present application devises a turning control configuration for the discharge auger to prevent the discharge auger from contacting the control unit etc.

Means for Solving the Problems

[0005] The invention according to claim 1 is a work vehicle including a traveling body, a harvesting device 4 that harvests crops on the front side of the body, a separating device 3 that separates the harvested crops into harvested products and discharge products, a recovery device 5 that stores the separated harvested products, a control unit 6 on which an operator rides, a discharge auger 7 that discharges the crops in the recovery device 5, and a covering member 10 that covers the upper part of the control unit 6. The discharge auger 7 is configured to be rotatable left and right about a first rotation axis 11 in the vertical direction and to be rotatable up and down about a second rotation axis 12 in the horizontal direction in the left-right direction. On the left and right Lowering regulation range one side and the other side in the left and right directions of the discharge auger 7, lowering restriction switches 15 are respectively arranged. The lowering regulation switch 15 on one or the other side is configured to be turned on and off by contact, The arrangement of the lowering restriction switches 15 is such that the discharge auger 7 does not face above the control unit 6 and the covering member 10. When the discharge auger 7 rotates and On one or the other side contacts either of of the lowering restriction switches 15, the lowering of the discharge auger 7 is restricted. In a state where the lowering of the discharge auger 7 is restricted, when the discharge auger 7 is rotated to On one or the other side contact either one of the lowering restriction switches 15, the lowering restriction of the discharge auger 7 is released. The work vehicle is characterized by this. The invention according to claim 2 is a work vehicle including a harvesting device 4 that harvests crops on the front side of the body, a separating device 3 that separates the crops into harvested products and discharge products, a recovery device 5 that stores the separated harvested products, a discharge auger 7 that discharges the crops in the recovery device 5, a control unit 6 on which an operator rides, and a covering member 10 of the control unit 6. The discharge auger 7 is configured to be rotatable left and right about a first rotation axis 11 in the vertical direction and to be rotatable up and down about a second rotation axis 12 in the horizontal direction. An ascending detection switch 30 is arranged in the up and down rotation range of the discharge auger 7. The ascending detection switch 30 is switched between ON and OFF at an angle where the discharge auger 7 faces above the control unit 6 and the covering member 10 but does not contact them. When the discharge auger 7 is rotated from above to below, it turns ON, the downward rotation of the discharge auger 7 is restricted, and when the discharge auger 7 is rotated from below to above, it turns OFF, and the restriction of the downward rotation of the discharge auger 7 is released. The work vehicle is characterized by this. The invention according to claim 3 is characterized in that when the rising detection switch 30 is arranged within the vertical rotation range of the discharge auger 7, and when one of the left and right lowering restriction switches 15 is in the on state and the rotation angle of the discharge auger 7 at which the rising detection switch 30 turns on, the rotation in the left and right directions is restricted on the spot. When the rotation angle of the discharge auger 7 is such that the rising detection switch 30 turns off, or when the rising detection switch 30 turns off by the operation of the discharge auger 7, the left and right rotation operation of the discharge auger 7 is accepted in a state where the downward rotation is restricted until one of the left and right lowering restriction switches 15 next turns on. This is the working vehicle according to claim 1. The invention according to claim 4 is characterized in that the lowering restriction switches 15 are respectively arranged on one side and the other side of the left and right within the left and right rotation range of the discharge auger 7. Even when one of the left and right lowering restriction switches 15 is in the on state, when the rising detection switch 30 is off, it is determined that the discharge auger 7 can pass above the control unit 6 or the covering member 10 without interference, and the downward rotation operation is accepted until the angle at which the rising detection switch 30 turns on. This is the working vehicle according to claim 2. The invention according to claim 5 is characterized in that an auger priority switch 16 is arranged on the control unit 6 to accept the left and right and vertical rotation operations of the discharge auger 7 with priority over the on and off states of the left and right lowering restriction switches 15 and the rising detection switch 30. The auger priority switch 16 becomes operable when the signals of the left and right lowering restriction switches 15 or the lowering restriction switch 15 are interrupted, or when abnormal signal values are continuously received. This is the working vehicle according to any one of claims 1 to 4.

Advantages of the Invention

[0006] In the invention of claim 1, in a work vehicle including a traveling body, a harvesting device 4 that harvests crops on the front side of the body, a separating device 3 that separates the harvested crops into harvested products and discharged materials, a recovery device 5 that stores the separated harvested products, a control unit 6 on which an operator rides, a discharge auger 7 that discharges the crops in the recovery device 5, and a covering member 10 that covers the upper part of the control unit 6, the discharge auger 7 is configured to be rotatable left and right about a first rotation axis 11 in the vertical direction and to be rotatable up and down about a second rotation axis 12 in the horizontal axis shape in the left-right direction. On the left and right Lowering regulation range one side and the other side of the left and right of the discharge auger 7, lowering restriction switches 15 are respectively arranged. The lowering regulation switch 15 on one or the other side is configured to be turned on and off by contact, The arrangement of the lowering restriction switches 15 is such that the discharge auger 7 does not face above the control unit 6 and the covering member 10, and when the discharge auger 7 rotates and On one or the other side either of contacts the lowering restriction switch 15, the lowering of the discharge auger 7 is restricted. With the lowering of the discharge auger 7 restricted, when the discharge auger 7 is rotated and On one or the other side contacts either one of the lowering restriction switches 15, the lowering restriction of the discharge auger 7 is released. Therefore, when any one of the lowering restriction switches 15 is turned on and the lowering of the discharge auger 7 is restricted, it is possible to prevent the discharge auger 7 from contacting the control unit 6 or the covering member 10, so the safety of the work is improved and damage to the covering member 10 is prevented. In addition, the covering member 10 does not prevent the left-right rotation of the discharge auger 7, and the work of discharging the harvested products in the recovery device 5 outside the machine is not hindered, preventing a decrease in work efficiency. In the invention according to claim 2, in a work vehicle including a harvesting device 4 that harvests crops on the front side of the machine body, a separating device 3 that separates the crops into harvested products and discharged products, a recovery device 5 (granary tank) that stores the separated harvested products, a discharge auger 7 that discharges the crops in the recovery device 5, a control unit 6 on which an operator rides, and a covering member 10 (such as a sun visor) of the control unit 6, the discharge auger 7 is configured to be rotatable left and right about a first rotation axis 11 in the vertical direction and to be rotatable up and down about a second rotation axis 12 in the horizontal direction. An ascending detection switch 30 is disposed within the up-and-down rotation range of the discharge auger 7. The ascending detection switch 30 switches between ON and OFF at an angle at which the discharge auger 7 faces above the control unit 6 and the covering member 10 but does not contact them. When the discharge auger 7 is rotated from above downward, it turns ON, and the downward rotation of the discharge auger 7 is restricted. When the discharge auger 7 is rotated from below upward, it turns OFF, and the restriction on the downward rotation of the discharge auger 7 is released. Therefore, when the ascending detection switch 30 turns ON, the descent of the discharge auger 7 is restricted, preventing contact with the covering member 10 and damage to the discharge auger 7 and the covering member 10. Further, the left-and-right rotation of the discharge auger 7 is not obstructed by the covering member 10, the operation of discharging the harvested products in the recovery device 5 outside the machine is not hindered, and a decrease in work efficiency is prevented. In the invention according to claim 3, an ascending detection switch 30 is disposed within the up-and-down rotation range of the discharge auger 7. When one of the left-and-right descending restriction switches 15 is in the ON state and the discharge auger 7 is at a rotation angle at which the ascending detection switch 30 turns ON, the left-and-right rotation is restricted on the spot. When the discharge auger 7 is at a rotation angle at which the ascending detection switch 30 turns OFF or when the ascending detection switch 30 turns OFF due to the operation of the discharge auger 7, the left-and-right rotation operation of the discharge auger 7 is accepted while the downward rotation is restricted until one of the left-and-right descending restriction switches 15 next turns ON. Therefore, damage to the covering member 10 and contact with the operator are prevented. If the upward rotation is also simultaneously operated in addition to the left-and-right rotation, the discharge auger 7 can be rotated while straddling the control unit 6 or the covering member 10, enabling easy movement to the discharge position. In the invention of claim 4, the downward movement restriction range switches 15L and 15R are respectively arranged on one side and the other side of the left and right rotation range of the discharge auger 7. Even when one of the left and right downward movement restriction range switches 15L and 15R is in the on state, when the rotation restriction switch 25 is in the on state, it is determined that the discharge auger 7 can pass above the control unit 6 or the covering member 10 without interference, and the downward rotation operation is accepted until the angle at which the upward detection switch 30 turns on. Therefore, even when the discharge auger 7 faces the upper part of the control unit 6 or the covering member 10, the discharge auger 7 can be rotated in the left and right directions while being lowered, and the posture change and position change of the discharge auger 7 can be arbitrarily performed according to the working conditions, preventing damage and reduction of working efficiency. In the invention of claim 5, an auger priority switch 16 is arranged on the control unit 6 to be in a state of accepting the left and right and up and down rotation operations of the discharge auger 7 with priority over the on and off states of the left and right downward movement restriction switches 15 and the upward detection switch 30. The auger priority switch 16 is configured to be operable when the signals of the left and right downward movement restriction switches 15 or the downward movement restriction switch 15 are interrupted or abnormal signal values are continuously received. Therefore, by providing the auger priority switch 16, even if the left and right downward movement restriction switches 15 or the upward detection switch 30 are always in the on state or in a state where disconnection prevents detection, the discharge auger 7 can be operated without repair, preventing the working time from becoming long. The operation of the auger priority switch 16 is possible only when the left and right downward movement restriction switches 15 and the upward detection switch 30 are malfunctioning, preventing the auger priority switch 16 from being accidentally turned on and bringing the discharge auger 7 into contact with the control unit 6 or the covering member 10.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Mode for Carrying Out the Invention

[0008] When an embodiment of the present invention is described with reference to the drawings, 1 is the body frame of a work vehicle (combine), 2 is the traveling device below the body frame 1, 3 is a separating device (threshing device) provided on one side above the body frame 1, 4 is a cutting device, 5 is a collecting device (grain tank) provided on the side of the threshing device 3, 6 is the control unit, and 7 is a discharge auger for discharging the harvested material in the collecting device 5. That is, in a work vehicle including a traveling body, a harvesting device (mowing device) 4 that harvests crops on the front side of the body, a separating device 3 that separates the harvested crops into harvested products and discharged materials, a recovery device (grain tank) 5 that stores the separated harvested products, an operator's cab 6 where an operator rides, a discharge auger 7 that discharges the crops in the recovery device 5, and a covering member (such as a sun visor) 10 that covers the upper part of the cab 6, the discharge auger 7 is configured to be rotatable left and right (swing) around a first rotation axis 11 in the vertical direction (longitudinal axis shape) within a predetermined angle range, and is also configured to be rotatable up and down around a second rotation axis 12 in the left-right direction (transverse axis shape) within a predetermined angle range.

[0009] Lowering restriction switches 15L and 15R are respectively arranged on one left and the other right sides of the left-right rotation range of the discharge auger 7. The arrangement of the lowering restriction switches 15 is set to a position (end part) where the discharge auger 7 does not face above the cab 6 and the covering member 10. When the discharge auger 7 rotates and contacts either one of the lowering restriction switches 15, the lowering of the discharge auger 7 is restricted. When the discharge auger 7 rotates and contacts either one of the lowering restriction switches 15, the lowering of the discharge auger 7 is restricted. When the discharge auger 7 is rotated to contact either one of the lowering restriction switches 15 in a state where the lowering of the discharge auger 7 is restricted, the lowering restriction of the discharge auger 7 is released. Therefore, when any one of the lowering restriction switches 15 is turned on and the lowering of the discharge auger 7 is restricted, it is possible to prevent the discharge auger 7 from contacting the cab 6 or the covering member 10, so the work safety is improved and the damage to the covering member 10 is prevented.

[0010] Also, the covering member 10 does not prevent the left-right rotation of the discharge auger 7, and the work of discharging the harvested products in the recovery device 5 outside the machine is not hindered, preventing a decrease in work efficiency. That is, for example, in a plan view, the discharge auger 7 is located on the left side of the control unit 6 in the storage position, and when discharging grains, it may turn to the right side of the machine body beyond the control unit 6. When passing over the control unit 6, it may contact the control unit 6 due to an operation error. When turning the discharge auger 7, it is configured to first rise above the covering member 10 of the control unit 6 and then turn, and in a plan view, the downward movement of the discharge auger 7 within the range overlapping the covering member 10 of the control unit 6 is restricted by the downward movement restricting switch 15.

[0011] In a work vehicle including a harvesting device 4 that harvests crops on the front side of the machine body, a separating device 3 that separates the harvested crops into harvested products and discharged products, a recovery device 5 (grain tank) that stores the separated harvested products, a discharge auger 7 that discharges the crops in the recovery device 5, a control unit 6 on which an operator rides, and a covering member 10 (such as a sun visor) of the control unit 6, the discharge auger 7 is configured to be rotatable left and right about a first rotation axis 11 in the vertical direction and rotatable up and down about a second rotation axis 12 in the horizontal direction. An upward detection switch 30 is arranged within the up and down rotation range of the discharge auger 7. The upward detection switch 30 is switched between ON and OFF at an angle where the discharge auger 7 faces above the control unit 6 and the covering member 10 but does not contact them. When the discharge auger 7 rotates from above to below, it turns ON, the downward rotation of the discharge auger 7 is restricted, and when the discharge auger 7 rotates from below to above, it turns OFF, and the restriction on the downward rotation of the discharge auger 7 is released.

[0012] Therefore, when the upward detection switch 30 turns ON, the downward movement of the discharge auger 7 is restricted, thereby preventing the discharge auger 7 and the covering member 10 from being damaged by contacting each other. Also, the covering member 10 does not prevent the left and right rotation of the discharge auger 7, and the work of discharging the harvested products in the recovery device 5 outside the machine is not hindered, preventing a decrease in work efficiency. An ascending detection switch 30 is arranged within the vertical rotation range of the discharge auger 7. When either the left or right descending restriction switch 15 is in the on state and the rotation angle of the discharge auger 7 is such that the ascending detection switch 30 turns on, the rotation in the left - right direction is restricted on the spot. When the rotation angle of the discharge auger 7 is such that the ascending detection switch 30 turns off, or when the ascending detection switch 30 turns off due to the operation of the discharge auger 7, until either the left or right descending restriction switch 15 next turns on, the left - right rotation operation of the discharge auger 7 is accepted while the descending rotation is restricted.

[0013] Therefore, when it is determined that the amount of vertical rotation of the discharge auger 7 when it rotates in the left - right direction may interfere with the control unit 6 or the covering member 10, the rotation of the discharge auger 7 stops before it contacts the control unit 6 or the covering member 10. Thus, damage to the covering member 10 and contact with the operator are prevented. If the upward rotation is also being operated simultaneously in addition to the left - right rotation, the discharge auger 7 can be rotated while straddling the control unit 6 or the covering member 10, so that the movement to the discharge position can be easily performed. A configuration is adopted in which descending restriction range switches 15L and 15R are respectively arranged on one left - hand side and the other right - hand side of the left - right rotation range of the discharge auger 7. Even when either the left or right descending restriction range switch 15L or 15R is in the on state, when the rotation restriction switch 25 is in the on state, it is determined that the discharge auger 7 can pass above the control unit 6 or the covering member 10 without interference, and the downward rotation operation is accepted until the angle at which the ascending detection switch 30 turns on.

[0014] Therefore, even when the discharge auger 7 faces the upper part of the control unit 6 or the covering member 10, the discharge auger 7 can be rotated in the left - right direction while being lowered. Thus, the posture change and position change of the discharge auger 7 can be arbitrarily performed according to the working conditions, and damage and reduction of work efficiency are prevented. The control unit 6 is configured to arrange an auger priority switch 16 that accepts the left-right and up-down rotation operations of the discharge auger 7 with priority over the ON / OFF states of the left and right lowering control switches 15 and the rising detection switch 30. The auger priority switch 16 becomes operable when the signals of the left or right lowering control switches 15L or 15R are interrupted or abnormal signal values are continuously received.

[0015] Therefore, by providing the auger priority switch 16, even if the left and right lowering control switches 15L, 15R or the rising detection switch 30 are in the ON state all the time or in a state where disconnection occurs and detection cannot be performed, the operation of the discharge auger 7 can be performed without repair, thus preventing the working time from becoming long. The operation of the auger priority switch 16 is possible only when the left and right lowering control switches 15L, 15R or the rising detection switch 30 are malfunctioning, thereby preventing the auger priority switch 16 from being accidentally turned on and causing the discharge auger 7 to contact the control unit 6 or the covering member 10.

[0016] A discharge clutch switch 17 for turning on and off the drive to the discharge auger 7, a brake pedal 18 for switching the traveling vehicle body to a stopped state, an electromagnetic brake 20 for the rotation motor 19 of the discharge auger 7, a controller 21 for switching the energization to the electromagnetic brake 20, and when it is detected that the brake pedal 18 is depressed to a stopped state or the discharge clutch switch 17 is turned on, the controller 21 energizes the electromagnetic brake 20 and, when the discharge auger 7 is rotated, stops the energization to the electromagnetic brake 20 after a delay of a certain time (0.5 seconds). Therefore, when the discharge clutch switch 17 is turned on or the brake pedal 18 is depressed to a stopped state, the electromagnetic brake 20 in the rotation motor 19 operates, so that even if the discharge auger 7 is operated, the discharge auger 7 can be prevented from immediately moving due to the action of the electromagnetic brake 20, thus preventing the discharge position from shifting due to a misoperation and preventing extra time and labor from being required for the housing operation.

[0017] During the operation of the brake pedal 18, the electromagnetic brake 20 operates regardless of the on / off state of the discharge clutch switch 17. Thus, even if the rotation operation of the discharge auger 7 is accidentally performed during parking, the brake is applied at the rotation start end of the discharge auger 7, preventing the discharge auger 7 from rotating when it is not an intentional operation. When operating the discharge auger 7, such as changing the discharge position, the power supply to the electromagnetic brake 20 is stopped with a time interval, making it easier for the discharge auger 7 to rotate, so that the discharge position can be easily changed. A sensor is provided to detect that the discharge auger 7 is in a position where it is raised above the covering member (sundvisor) 10 and will not collide even when it rotates, with respect to the turning range of the discharge auger 7.

[0018] In conventional combines, a position sensor such as a potentiometer is used to detect the turning position of the discharge auger 7 or the tip height position of the discharge auger 7. However, for combines exported overseas, even if troubles such as position errors occur in the market, it is possible to repair including parts procurement in the domestic market, but it is often difficult overseas. Therefore, in the present invention, the tip position and tip height of the discharge auger 7 are detected by the sensor 26 to avoid contact with the covering member 10. An ascending detection switch 30 that turns off when the rotation angle of the discharge auger 7 reaches a predetermined angle or more, and input information such as the descending regulation range switches 15L and 15R are input to the controller 21 equipped with a microcomputer.

[0019] That is, the detection information of the ascending detection switch 30, the descending regulation range switches 15L and 15R, and the operation (manual operation by the operator) information of the discharge auger 7 are input to the controller 21 equipped with a microcomputer. Also, the operation information of the discharge auger 7 is the operation information of the switches (or dials) for operating the up / down and left / right (=clockwise / counterclockwise) turning of the discharge auger 7, which is indicated by the switches numbered 11 to 14 surrounded by a square in Fig. 5. This information is input to the controller 21 equipped with a microcomputer. Therefore, the swing control of the discharge auger 7 can be achieved with a low-cost configuration and low power consumption.

[0020] That is, by inputting the operation amount (number of times or operation time of long pressing) of the switch into the microcomputer 31 of the controller 21 instead of the sensor detection value such as a potentiometer, the function can be ensured with an inexpensive computer having a low arithmetic processing ability. Based on the information input to the controller 21, the output of the auger up and down, swing, and electromagnetic brake 20 is configured to be performed. When either one of the lowering restriction range switches 15L and 15R is pressed and the rotation angle of the discharge auger 7 becomes a predetermined angle or more, the upward detection switch 30 described later turns OFF, thereby switching each valve for upward movement, downward movement, and unloading (numbers 2 to 4 in the square frame of the controller 21 in FIG. 5), and restricting the flow of the hydraulic oil for downward movement.

[0021] The lowering restriction range switches 15L and 15R are respectively provided at both ends of the range where the discharge auger 7 may collide with the operation seat 9 and the covering member 10 when the discharge auger 7 is lowered. When the discharge auger 7 is positioned within the said range in FIG. 3 until either one of the switches 15 is pressed again after either one of the switches 15 is pressed, the upward detection switch 30 is switched, and the hydraulic oil supply to the lowering valve (number 3 in the square frame in the controller 21 in FIG. 1) is not performed, so that the discharge auger 7 does not lower. In other words, the lowering restriction switches 15L and 15R are pushed when the discharge auger passes above. When either one of the left and right lowering restriction switches 15L and 15R is pressed from the state where neither of them is pressed, and the upward detection switch 30 is in the ON state (= the discharge auger 7 is at a height where it can contact the work seat or the supervisor), the left and right rotation of the discharge auger 7 is stopped. At this time, when the operator raises the discharge auger 7 to an angle at which the upward detection switch 30 turns OFF, the left and right rotation operation of the discharge auger 7 is permitted.

[0022] When either the left or right lowering restriction switch 15L or 15R is pressed, the lowering operation of the discharge auger 7 is disabled, or a restriction is imposed on the vertical rotation range with the angle at which the upward detection switch 30 turns on as the lower limit. This restriction is applied until the discharge auger 7 rotates to the position where it presses the other lowering restriction switch or until it rotates to the position where it presses the previously pressed side's lowering restriction switch again, that is, until it rotates to a position where the discharge auger 7 cannot contact the work seat or the supervisor. This can prevent the discharge auger 7 from contacting the operation seat 9 and the covering member 10 and both of them from being damaged. The above-mentioned upward detection switch 30 is a limit switch that turns off when the discharge auger 7 rises by a predetermined angle or more. If it is off, it can be determined that the angle is a predetermined angle or more and that even if it rotates as it is, it will not collide with the operation seat 9 or the covering member 10. As a result, the potentiometer can be made unnecessary.

[0023] That is, the auger upward detection switch 30 is composed of a limit switch or the like that turns off when the discharge auger 7 is raised by a predetermined angle or more. When the auger upward detection switch 30 is off, it is determined that the discharge auger 7 has risen to a position where it will not collide with the operation seat 9 or the covering member 10 even if it is rotated, and the turning operation of the discharge auger 7 is allowed. Also, until the auger upward detection switch 30 turns on, the lowering operation of the discharge auger 7 is allowed. When the auger upward detection switch 30 turns on, if either one of the lowering restriction range switches 15L and 15R is pressed by the rotation of the discharge auger 7 and then neither of the lowering restriction range switches 15L and 15R is pressed, the hydraulic valve is switched so that the lowering of the discharge auger 7 is interrupted by switching the upward detection switch 30.

[0024] As a result, even when the turning position of the discharge auger 7 is within the lowering restriction range (between the lowering restriction range switches 15L and 15R), the discharge auger 7 can be lowered to a position where it will not collide with the operation seat 9 or the covering member 10, so that the discharge auger 7 can be prevented from contacting objects located above the field such as electric wires. When the discharge auger 7 is raised and the auger lift detection switch 30 is turned on, the turning operation of the discharge auger 7 becomes possible. Therefore, interference and collision between the cover member 10, the operator's seat 9, and the discharge auger 7 can be prevented. When the discharge auger 7 is directly above the operator's seat 9 and the auger lift detection switch 30 is on, the lowering operation is possible until it is turned off. Also, when the lowering operation is performed and it is turned off, the microcomputer 31 is configured to process so that it cannot be lowered even if the lowering operation is performed. Therefore, it is possible to prevent the discharge auger 7 from coming into contact with the operator's seat 9 or the cover member 10 and both being damaged.

[0025] Although it is stated that the output to the rotation motor 19 is stopped (regulated) by the lowering regulation switch 15 or the like, assuming a situation where work cannot be done due to a failure or malfunction of each switch An auger priority switch 16 is provided to enable the operation of the discharge auger 7 in an emergency. Therefore, when an electrical trouble (such as a sensor 26 failure or disconnection) occurs in the market, it may take time for repair. An emergency operation means is provided so that the same usage as before can be forced. In the event of a failure or malfunction of each switch, it is possible to avoid a situation where the storage operation of the discharge auger 7 becomes impossible, and the machine body can be self-propelled and returned. When the circuit connected to the controller 21 is OPEN, the regulation is effective, and when the circuit is CLOSE, the regulation is ineffective. Therefore, it is possible to leave the emergency operation means so that the same usage as before can be forced.

[0026] In addition to the configuration that enables the operation of the discharge auger 7 in an emergency (failure) by the above-described auger priority switch 16, by configuring the circuit to be switchable between OPEN and CLOSE by inserting and removing the fuse 41 in the fuse box 40, even in a state where the operation of the auger priority switch 16 cannot be accepted, by physically inserting and removing the fuse 41, the operation of the discharge auger 7 can be made possible, and the harvesting and discharging work of the grain can be performed without taking time for repair. This can prevent the situation where harvesting cannot be carried out at the appropriate time and the grains cannot be discharged for a long time, thus preventing the deterioration of the quality of the harvested product.

[0027] That is, if the straw is left uncut and exposed to rain or strong winds, the straw will fall over, making it difficult to cut, and the moisture content of the grains will increase. If it is naturally dried, it will take a long time, and if a dryer is used, more fuel will be required. And if the grains are left in the grain tank, the moisture content will decrease due to evaporation of moisture and metabolism of the grains, making them prone to cracking in the subsequent process, but this is prevented. Therefore, by enabling the above-mentioned emergency measures, the aircraft can be turned back for repair after completing a series of operations. Therefore, a simple check of the operation confirmation of the switch configuration can be performed on-site. The controller 21 is provided with a check switch fuse 41 and is configured to be able to execute the check function when the circuit is closed.

[0028] Therefore, a simple check of the operation confirmation of the switch configuration can be performed on-site. In this case, when the controller 21 is executing the check function by the fuse 41, when the switches (No. 11 to 18 in the square frame) in the circuit diagram of the controller 21 in FIG. 5 are operated ON⇔OFF, a buzzer 42 shall output a buzzing sound. Note that No. 11 in the square frame described on the right side of the controller in FIG. 5 is the upper switch for raising the discharge auger 7, No. 12 in the square frame is the lower switch, No. 13 in the square frame is the left switch, No. 14 in the square frame is the right switch, No. 15 in the square frame is the auger range switch (lower limit regulation switches 15L, 15R), No. 16 in the square frame is the auger upward detection switch (upward detection switch 30), No. 17 in the square frame is the discharge reverse switch (discharge clutch switch 17), and No. 18 in the square frame is the auger switching regulation switch (auger priority switch 16).

[0029] The controller 21 is provided with a circuit for energizing the electromagnetic brake 20 installed in the rotation motor 19 of the discharge auger 7, and has a function of switching energization or non-energization (release) according to input information (detection information of the rising detection switch 30, the lowering regulation switch 15, and operation information of the discharge auger 7), etc. Conventionally, relays or the like have been used to switch between energization and non-energization (release), resulting in a large number of components. In the present invention, only the controller 21 is used, so the number of components can be reduced. When the parking brake pedal 18 of the control unit 6 is depressed (when engaged), the electromagnetic brake 20 of the rotation motor 19 is energized, and when the parking brake pedal 18 (Fig. 5) is not depressed (when disengaged), the electromagnetic brake 20 is de-energized (released).

[0030] Therefore, customization by the control of the controller 21 becomes possible. When the discharge clutch switch 17 of the discharge auger 7 is engaged, the electromagnetic brake 20 of the rotation motor 19 is energized, and when the discharge clutch switch 17 is disengaged, the electromagnetic brake 20 is de-energized (released). Therefore, customization by the control of the controller 21 becomes possible. In this case, even when the discharge clutch switch 17 is disengaged, when the parking brake pedal 18 is depressed (when engaged), the electromagnetic brake 20 shall be energized when disengaged. That is, even when the discharge clutch switch 17 is disengaged, when the parking brake pedal 18 is depressed (when the parking brake pedal switch (No. 19 of the controller 21 in Fig. 1) is engaged), the electromagnetic brake 20 shall be energized.

[0031] Therefore, customization by the control of the controller 21 becomes possible. Even when the electromagnetic brake 20 of the rotation motor 19 is in an energized state, when performing auger rotation output, it shall be de-energized (released). In this case, when performing the auger turning output, it means that an operator manually operates a switch provided on the operation unit 6 or a remote controller (not shown) to turn the discharge auger 7 left and right (rotate), and since the discharge auger 7 cannot turn left and right (rotate) unless the rotation motor 19 operates, when the above switch is pressed, the energization of the electromagnetic brake 20 is cut off each time regardless of the operation time. Therefore, customization by the control of the controller 21 becomes possible. When the electromagnetic brake 20 of the rotation motor 19 is actuated when the discharge auger 7 stops rotating from the turning state, a delay of a certain time (for example, 0.5 seconds) shall be provided.

[0032] That is, since the discharge auger 7 is long and has a certain weight, if the energization of the rotation motor 19 is stopped to stop the rotation of the discharge auger 7 and the electromagnetic brake 20 is actuated simultaneously with this power-off to cause an emergency stop, the load due to the inertia of the rotation of the discharge auger 7 will be greater on the rotation motor 19 and the electromagnetic brake 20, resulting in a decrease in durability. However, after stopping the rotation motor 19, by actuating the electromagnetic brake 20 after a short delay, it is possible to stop while suppressing the load on the rotation motor 19, the electromagnetic brake 20, and the discharge auger 7.

[0033] A plurality of crop lifters 50 for lifting the crops in the field are arranged in parallel in the left-right direction at the front of the harvesting device (mowing device) 4. The crop lifter 50 is configured to drive and rotate an endless crop lifter chain (not shown) provided with crop lifter lugs 51 to lift the crops in the field, and a left-right rotation shaft (not shown) is provided at the lower part of the crop lifter 50, and it is configured to be switchably rotatable between a working state of lifting the crops and a maintenance state of falling forward (Fig. 9). An upper cover 60 that surrounds the upper part of the crop lifter 50 is provided on the upper part of the crop lifter 50. The upper cover 60 is detachably attached to the fixed part of the harvesting device 4 without tools, either openable / closable or detachable. Therefore, when opening the triggering device 50 during maintenance work, when the triggering device 50 is opened, by opening, closing, or detaching the upper cover 60, the opening operation of the triggering device 50 can be performed without interference, and the upper cover 60 can be opened, closed, or detached without tools.

[0034] A left-right support bar 63 for fixing the upper cover 60 to the upper part 62 of the cutting unit gear case of the harvesting device 4 is provided, and a mounting fitting 64 provided on the upper cover 60 side is detachably engaged with the support bar 63 (Fig. 10). That is, the upper cover 60 is rotatably attached to a fixed-side cover 65 fixed to the fixed side of the harvesting device 4 by a hinge 68 having a left-right rotation axis 67 for a moving-side cover 66 that rotates in the vertical direction, and a mounting fitting 64 is provided on the moving-side cover 66. The mounting fitting 64 is attached to the back surface at an upper position at a predetermined interval from the lower end of the moving-side cover 66. When an operation surface 69 is formed between the mounting fitting 64 and the lower end of the moving-side cover 66, it is suitable for facilitating the opening operation of the upper cover 60.

[0035] In this case, the engagement between the mounting fitting 64 and the support bar 63 does not come off during normal crop harvesting operations. However, if the mounting fitting 64 is configured to have an elasticity such that the engagement comes off when the operation surface 69 is lifted manually without tools, it is suitable. A support bar 63 for fixing the upper cover 60 to the upper part 62 of the cutting unit gear case is provided, and a regulating member 70 for regulating the left-right position of the upper cover 60 is provided on the support bar 63. In a configuration where the upper cover 60 of the combine can be pulled out without tools, the upper cover 60 and the machine body are fixed by a mounting fitting 64. A reinforcing plate 75 is provided on the upper cover 60, and the bracket arm hanger 61 is fixed to the reinforcing plate 75 (Fig. 13). The upper cover 60 is divided into a front and rear two-part configuration with a fixed-side cover 65 and a moving-side cover 66 (Fig. 9).

[0036] Therefore, a configuration for rotatably opening the moving-side cover 66 of the upper cover 60 can be easily realized. The upper cover 60 is configured to be divided into a fixed-side cover 65 and a movable-side cover 66 in the front-rear direction, and the fixed-side cover 65 and the movable-side cover 66 are connected by a hinge 68 having a rotation axis 67. Therefore, the upper cover 60 can be opened and closed without tools. The support bar 63 is provided on the upper part of the cutting unit gear case 62. The upper cover 60 and the machine body are fixed by a mounting bracket 64. FIG. 13 shows another embodiment in which the upper cover 60 is detachably attached without tools. A reinforcing plate 75 is provided on the rear surface (inner surface, back surface) of the upper cover 60. Mounting brackets 64 are arranged in parallel in the front-rear direction on the reinforcing plate 75 by bolts 76. The support bar 63 is provided at the fixing part of the harvesting device 4 corresponding to the mounting bracket 64.

[0037] Therefore, when the mounting bracket 64 formed of a spring material is fitted and engaged with the support bar 63, the upper cover 60 is fixedly attached. When the operation surface 69 is lifted by hand, the upper cover 60 can be removed. A fuel tank 81 is provided behind the left and right side plates 80 of the threshing device 3. The fuel tank 81 is surrounded by a fuel tank cover 82. The left and right sides of the fuel tank cover 82 are respectively welded and fixed to the left and right side plates 80 (FIG. 14). Therefore, the fuel tank cover 82 constitutes a part of the machine frame of the threshing device 3, contributing to the improvement of the rigidity of the machine body. Also, since the fuel tank cover 82 is welded and fixed to the left and right side plates 80 from the beginning, the left and right side plates 80 and the fuel tank cover 82 can surround the fuel tank 81 without gaps, preventing the intrusion of straw debris and straw dust, and improving the cleanability.

[0038] If the fuel tank cover 82 is shaped to cover the front, upper, and rear surfaces of the fuel tank 81 (FIG. 15), it can further prevent the intrusion of straw debris and straw dust, and improve the cleanability. In the fuel tank cover 82 of the embodiment shown in FIG. 16, cover guides 83 are respectively provided on the left and right sides of the fuel tank 81. The fuel tank cover 82 is placed on these left and right cover guides 83 from above and fixed, and is configured to be a retrofitted type that covers the front, upper, and rear surfaces of the fuel tank 81. This makes it easy to identify the position where the fuel tank cover 82 is to be attached, thus shortening the time required for the attachment / detachment work. In addition, gaps are less likely to occur during attachment, and it is possible to prevent foreign matters such as straw chips from entering around the fuel tank 81.

Explanation of Signs

[0039] 1…Airframe frame, 2…Travel device, 3…Threshing device, 4…Harvesting device, 5…Recovery device, 6…Control unit, 7…Discharge auger, 9…Operator's seat, 10…Cover member, 11…First rotating shaft, 12…Second rotating shaft, 15…Lowering restriction switch, 16…Auger priority switch, 17…Discharge clutch, 18…Brake pedal, 19…Rotating motor, 20…Electromagnetic brake, 21…Controller, 30…Rise detection switch (auger rise detection switch), 31…Microcomputer, 40…Fuse box, 41…Fuse, 42…Buzzer, 50…Actuating device, 51…Actuating lug, 52…Actuating chain, 53…Rotating shaft, 60…Upper cover, 62…Upper cutter gear case, 63…Support bar, 64…Mounting bracket, 65…Fixed side cover, 66…Moving side cover, 67…Rotating shaft, 68…Hinge, 69…Operating surface, 70…Restricting member, 75…Reinforcing plate, 76…Bolt, 80…Left and right side plates, 81…Fuel tank, 82…Fuel tank cover.

Claims

1. In a work vehicle comprising a traveling body, a harvesting device (4) for harvesting crops on the front side of the body, a separating device (3) for separating the harvested crops into harvested products and discharged materials, a recovery device (5) for accommodating the separated harvested products, a control unit (6) on which an operator boards, a discharge auger (7) for discharging the crops in the recovery device (5), and a covering member (10) covering above the control unit (6), the discharge auger (7) is configured to be rotatable left and right about a first rotation axis (11) in the vertical direction and to be rotatable up and down about a second rotation axis (12) in the horizontal direction (in the shape of a horizontal axis). Lowering limit switches (15) are respectively arranged on one left and one right side of the left and right lowering restriction ranges of the discharge auger (7). The lowering limit switch (15) on one left or right side is configured to be turned on and off by contact. The arrangement of the lowering limit switch (15) is such that the discharge auger (7) does not face above the control unit (6) and the covering member (10). When the discharge auger (7) rotates and contacts either the lowering limit switch (15) on one side or the other, the lowering of the discharge auger (7) is restricted. When the discharge auger (7) is rotated in a state where its lowering is restricted and brought into contact with either the lowering limit switch (15) on one side or the other, the lowering restriction of the discharge auger (7) is released. A work vehicle characterized by this.

2. In a work vehicle comprising a harvesting device (4) for harvesting crops on the front side of the body, a separating device (3) for separating the crops into harvested products and discharged materials, a recovery device (5) for accommodating the separated harvested products, a discharge auger (7) for discharging the crops in the recovery device (5), a control unit (6) on which an operator boards, and a covering member (10) of the control unit (6), the discharge auger (7) is configured to be rotatable left and right about a first rotation axis (11) in the vertical direction and to be rotatable up and down about a second rotation axis (12) in the horizontal direction. An ascending detection switch (30) is arranged in the up and down rotation range of the discharge auger (7). The ascending detection switch (30) is turned on and off at an angle where the discharge auger (7) faces above the control unit (6) and the covering member (10) but does not contact them. When the discharge auger (7) is rotated from above downward, it turns on. The downward rotation of the discharge auger (7) is restricted. When the discharge auger (7) is rotated from below upward, it turns off. The restriction on the downward rotation of the discharge auger (7) is released. A work vehicle characterized by this.

3. An ascending detection switch (30) is arranged within the vertical rotation range of the discharge auger (7). When either one of the left and right descending restriction switches (15) is in the ON state and the rotation angle of the discharge auger (7) is such that the ascending detection switch (30) turns ON, the rotation in the left - right direction is restricted on the spot. When the rotation angle of the discharge auger (7) is such that the ascending detection switch (30) turns OFF, or when the ascending detection switch (30) turns OFF due to the operation of the discharge auger (7), the left - right rotation operation of the discharge auger (7) is accepted in a state where the downward rotation is restricted until either one of the left and right descending restriction switches (15) next turns ON. The work vehicle according to claim 1, characterized in that.

4. The configuration is such that the descending restriction switches (15) are respectively arranged on the left - hand side and the right - hand side within the left - right rotation range of the discharge auger (7). Even when either one of the left and right descending restriction switches (15) is in the ON state, when the ascending detection switch (30) is OFF, it is determined that the discharge auger (7) can pass above the control unit (6) or the covering member (10) without interference, and the downward rotation operation is accepted until the angle at which the ascending detection switch (30) turns ON. The work vehicle according to claim 2, characterized in that.

5. On the control unit (6), an auger priority switch (16) is arranged such that the left - right and vertical rotation operations of the discharge auger (7) are accepted preferentially over the ON / OFF states of the left and right descending restriction switches (15) and the ascending detection switch (30). The auger priority switch (16) becomes operable when the signals of the left and right descending restriction switches (15) or the descending restriction switch (15) are interrupted, or when abnormal signal values are continuously received. The work vehicle according to any one of claims 1 to 4, characterized in that.

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