Work vehicle

Abstract

To provide a work vehicle that is easily operated to change a position of a reception device and retain the position of the reception device.SOLUTION: A work vehicle includes: a reception device which receives a signal from a satellite; a first support frame 25 which supports the reception device and can change a position of the reception device between a preset storage position and a use position preset at a position on an upper side relative to the storage position; a retention mechanism LK which retains the first support frame 25 in a state where the position of the reception device becomes the storage position and a state where the position of the reception device becomes the use position; and a single operation handle 27c which is supported on the first support frame 25 and is manually operated. By operating the operation handle 27c, it is possible to change the position of the reception device between the storage position and the use position, and to switch between a position retention state and a position retention release state of the holding mechanism LK.SELECTED DRAWING: Figure 6

Description

[Technical Field]

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

[0002] For example, the work vehicle (referred to as a "combine" in the document) disclosed in Patent Document 1 is equipped with a receiving device (referred to as a "GPS antenna unit" in the document) that is supported by a support part (referred to as a "gate-shaped member" and a "support member" in the document) and receives signals from a satellite. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-103055 Summary of the Invention [Problem to be solved by the invention]

[0004] When the receiving device receives signals from a satellite, it is desirable to position the receiving device as high as possible to improve positioning accuracy. However, work vehicles are stored in storage facilities such as barns during times other than harvest season. The ceilings of storage facilities may be low, which could cause interference between the ceiling and the receiving device. Therefore, when the vehicle is stored, it is important to limit the height of the receiving device to approximately the overall height of a conventional work vehicle.

[0005] In a configuration in which the position of the receiving device can be changed between use and storage, it is necessary to change and maintain the position of the receiving device. However, in conventional work vehicles, changing the position of the receiving device and maintaining the position of the receiving device require separate tasks. Therefore, a configuration that allows workers to easily change and maintain the position of the receiving device is desirable.

[0006] An object of the present invention is to provide a work vehicle that can be easily operated to change the position of a receiving device and to maintain the position of the receiving device. [Means for solving the problem]

[0007] The work vehicle of the present invention is equipped with a receiving device that receives signals from a satellite, a first support frame that supports the receiving device and is capable of changing the position of the receiving device between a predetermined storage position and a predetermined usage position that is higher than the storage position, a holding mechanism that holds the first support frame in each of the states in which the position of the receiving device is in the storage position and the usage position, and a single operating handle that is supported by the first support frame and can be operated manually, and is characterized in that by operating the operating handle, it is possible to change the position of the receiving device between the storage position and the usage position, and to switch the holding mechanism between a position holding state and a position holding release state.

[0008] According to the present invention, a single operating handle can be used to both change the position of the receiving device and operate the holding mechanism. Therefore, compared to a configuration in which separate operating handles are used to change the position of the receiving device and operate the holding mechanism, the operation to release the position of the holding mechanism, the operation to change the position of the receiving device, and the operation to hold the position of the holding mechanism can be achieved in a single operation. This allows workers to easily change the position of the receiving device and switch the holding mechanism. In this way, the present invention realizes a work vehicle that is easy to operate to change the position of the receiving device and hold the position of the receiving device.

[0009] In the present invention, it is preferable that the operating handle is configured so that the direction of the operation for changing the position of the receiving device is different from the direction of the operation for switching the holding mechanism.

[0010] With this configuration, the operating direction of the operating handle differs depending on the purpose of the operation, which allows the passenger or the like to intuitively operate the operating handle and reduces the risk of operating the operating handle incorrectly.

[0011] In the present invention, a riding section is provided, the receiving device is arranged at a position biased to one side in the left-right direction relative to the left-right center of the riding section, and the operating handle preferably extends toward the left-right center of the riding section relative to the first support frame.

[0012] This configuration allows a passenger riding in the riding section to easily reach out to the grip section.

[0013] In the present invention, it is preferable that an elastic body be provided to bias the holding mechanism to the position-holding state.

[0014] With this configuration, the biasing force of the elastic body easily enables the holding mechanism to hold the receiver in position when the receiver is positioned in either the storage position or the use position. For example, if an operator operates the operating handle against the biasing force of the elastic body, the holding mechanism releases the position. The operator can then change the position of the receiver simply by operating the operating handle. This makes it easy to switch the holding mechanism and change the position of the receiver in a single operation.

[0015] In the present invention, it is preferable that the elastic body is a leaf spring interposed between the operating handle and the holding mechanism.

[0016] With this configuration, the holding mechanism of the present invention can be realized with a simple configuration using a leaf spring.

[0017] In the present invention, it is preferable that the holding mechanism is provided with a first engagement portion provided on one of the operating handle and the first support frame, and a second engagement portion and a third engagement portion provided on the other of the operating handle and the first support frame with which the first engagement portion can selectively engage, the second engagement portion corresponding to the storage position and the third engagement portion corresponding to the use position, and when the first engagement portion engages with the second engagement portion, the first support frame is held in a position where the receiving device is in the storage position, and when the first engagement portion engages with the third engagement portion, the first support frame is held in a position where the receiving device is in the use position.

[0018] With this configuration, the receiving device is held in the storage position by the engagement of the first engaging portion with the second engaging portion, and the receiving device is held in the usage position by the engagement of the first engaging portion with the third engaging portion. In other words, the holding mechanism of the present invention can be easily realized by the configuration in which three engaging portions are engaged.

[0019] In the present invention, it is preferable that the first support frame swings around a horizontal swing axis to change its state, the storage position is set to a position lower and forward of the use position, and the operating handle is positioned higher and rearward when the receiving device is located in the storage position than when the receiving device is located in the use position.

[0020] This configuration further simplifies the configuration of the first support frame and the operating handle.

[0021] In the present invention, it is preferable that the first support frame is slidably moved to change its state.

[0022] With this configuration, the receiving device can be easily moved up and down, thereby changing the position of the receiving device.

[0023] In the present invention, it is preferable that a second support frame is provided to support the first support frame, the second support frame is provided with a first frame member that extends vertically and supports the first support frame at its upper part, and a first member that reinforces the first frame member is provided at the lower part of the first frame member.

[0024] With this configuration, the receiving device and the first support frame are supported by the first frame member of the second support frame, and the lower part of the first frame member is reinforced by the first member. Therefore, vibration of the first frame member is suppressed compared to a configuration in which the lower part of the first frame member is not provided with the first member. This also suppresses vibration of the receiving device, improving the reception accuracy of the receiving device.

[0025] In the present invention, it is preferable that the first frame member is inclined so that the upper side is positioned closer to the front of the aircraft, and the first member is formed so that the front-to-rear width becomes wider towards the lower side in a side view of the aircraft.

[0026] With this configuration, the first frame member is tilted upward toward the front. This allows the receiver to be positioned closer to the front of the work vehicle. Furthermore, the first member is configured so that its front-to-back width increases toward the bottom when viewed from the side of the vehicle, thereby suppressing vibration of the first frame member that is tilted upward toward the front.

[0027] In the present invention, it is preferable that the second support frame is provided with a second frame member that is connected to the upper part of the first frame member, extends horizontally or approximately horizontally from the first frame member, and is inclined downward at the rear, and that the rear part of the second frame member is provided with a second member that is connected to the aircraft body.

[0028] With this configuration, the upper part of the first frame member is connected to the second frame member, and the rear part of the second frame member is also connected to the airframe, so that the first frame member is firmly supported by the second frame member, and vibrations at the upper part of the first frame member are further suppressed.

[0029] In the present invention, the second support frame is provided with a second frame member that is connected to the upper part of the first frame member and extends horizontally or approximately horizontally from the first frame member, and it is preferable that when the receiving device is located in the storage position, it is located at the same or approximately the same height as the upper end of the second frame member, or is located lower than the upper end of the second frame member.

[0030] With this configuration, when the position of the receiving device is changed to the storage position, the position of the receiving device does not become higher than the second frame member, so the position of the receiving device can be kept as low as possible during storage.

[0031] In the present invention, it is preferable that the second support frame is provided with a third frame member extending laterally of the aircraft when viewed from above, and that one end of the third frame member is provided with a third member connected to the first frame member.

[0032] With this configuration, one end of the third frame member is connected to the first frame member. With this configuration, even if the first frame member is subjected to a vibration force in the left-right direction of the aircraft, this left-right force is absorbed by the third frame member. As a result, the support part is less likely to vibrate in the left-right direction of the aircraft compared to a configuration without the third frame member.

[0033] In the present invention, it is preferable that a flat surface portion is formed on each of the first member and the third member, and that the third member and the first member are connected to each other with their respective flat surface portions aligned.

[0034] With this configuration, the first member at the bottom of the first frame member and the third member at one end of the third frame member are in surface contact with each other, thereby enabling the first frame member and the third frame member to be firmly connected to each other.

[0035] In the present invention, it is preferable that a boarding section having a boarding / alighting opening is provided, the other end of the third frame member is supported by the boarding section and is adjacent to the boarding / alighting opening, and the other end of the third frame member is provided with a handrail for passengers getting on and off through the boarding / alighting opening.

[0036] With this configuration, the third frame member also serves as a handrail, eliminating the need for a separate dedicated handrail and enabling cost reduction.

[0037] In the present invention, it is preferable that the third frame member is provided with a rod portion extending laterally of the aircraft when viewed from above, and a fourth member connected at the other end to the rod portion and the handrail, and that an illumination unit is supported on at least one of the handrail and the fourth member so as to be able to swing back and forth, and is capable of illuminating at least one of the front of the aircraft and the area around the boarding / alighting opening.

[0038] With this configuration, the third frame member doubles as a handrail and also doubles as a support member for the irradiation unit, which eliminates the need for a separate support member for the irradiation unit and enables further cost reduction.

[0039] In the present invention, a control device that performs at least one of automatic driving and automatic steering, and a first operating device that accepts manual operation to output commands to the control device are provided, and it is preferable that the first operating device is supported by the third frame member.

[0040] Control configurations for automatic driving, automatic steering, etc. in work vehicles are often implemented by modifying existing work vehicles. With this configuration, the first operating device is supported by the third frame member, so automatic driving and automatic steering of the work vehicle can be easily achieved without making any changes to the existing layout of the riding section of the existing work vehicle.

[0041] In the present invention, the vehicle is provided with a seat on which a passenger sits and a boarding section having a front panel located in front of the seat, a second operating device that receives at least one of steering operations and work operations is arranged on the front panel, the other end of the third frame member is connected to the outer end of the front panel laterally of the aircraft, and the first operating device is preferably arranged laterally outboard and forward of the second operating device.

[0042] According to this configuration, the first operating device is positioned laterally outboard and forward of the vehicle body relative to the second operating device. The area laterally inboard of the vehicle body relative to the second operating device and the area rearward of the second operating device are often occupied by, for example, instruments or other existing operating devices. With this configuration, the first operating device is positioned in a location that does not interfere with the operation of existing operating devices. This allows the work vehicle to easily achieve automatic driving and automatic steering without compromising the operability of conventional operating devices.

[0043] In the present invention, a conveying device is provided which has a vertical conveying section which vertically conveys grains stored in a grain tank that stores grains, and a horizontal conveying section which is connected to the upper end of the vertical conveying section, has a discharge outlet, and feeds grains from the vertical conveying section horizontally and discharges them from the discharge outlet, and the horizontal conveying section is configured to be able to move up and down and rotate left and right, and is able to extend outside the body from a storage state in which it is stored in a home position that spans the central part of the body when viewed from above, to discharge grains, and it is preferable that when the receiving device is located in the storage position, the upper end of the receiving device is located at the same or approximately the same height as the upper end of the horizontal conveying section in the storage state, or the entire receiving device is located lower than the upper end of the horizontal conveying section in the storage state.

[0044] Since the lateral conveyance section of the conveyance device is located at a relatively high position within the work vehicle, when the receiving device is in the first position, it is easy to keep the overall height of the work vehicle at the same level as that of a conventional work vehicle. This prevents interference between the ceiling and the receiving device even if the ceiling of the storage facility where the work vehicle is kept is low.

[0045] In the present invention, the first support frame is swung around a horizontal swing axis to change its state, and when the receiving device is located in the storage position, it is preferable that it is located rearward of the body than the front end of the lateral conveying section in the storage state.

[0046] With this configuration, the receiving device is located behind the lateral transport section when in the storage position, which makes it less likely for the receiving device to come into contact with foreign objects when the work vehicle is stored. [Brief explanation of the drawings]

[0047] [Figure 1] FIG. 1 is an overall side view of a combine harvester. [Figure 2] FIG. 1 is an overall plan view of a combine harvester. [Figure 3] FIG. 2 is a right side view of the fuselage showing the support structure for the passenger section, canopy, and receiving device. [Figure 4] FIG. 2 is a front view of the aircraft showing the support structure for the passenger section, the canopy, and the receiving device. [Figure 5] FIG. 2 is a plan view of the aircraft showing the support structure for the passenger section, the canopy, and the receiving device. [Figure 6] FIG. 2 is a right side view of the fuselage showing the swing support structure and position holding structure of the receiving device. [Figure 7] FIG. 2 is a plan view of the aircraft showing the swing support structure and position holding structure of the receiving device. [Figure 8] FIG. 2 is a front view of the fuselage showing the swing support structure and position holding structure of the receiving device. DETAILED DESCRIPTION OF THE INVENTION

[0048] The work vehicle of this embodiment will be described below using a head-feeding combine as an example.

[0049] FIG. 1 is a left side view of a combine harvester, and FIG. 2 is a plan view of the combine harvester. For ease of understanding, in this embodiment, unless otherwise specified, "front" (the direction of arrow "F" in FIG. 1 ) refers to the front in the longitudinal direction (traveling direction) of the machine body, and "rear" (the direction of arrow "B" in FIG. 1 ) refers to the rear in the longitudinal direction (traveling direction) of the machine body. Furthermore, "up" (the direction of arrow "U" in FIG. 1 ) and "down" (the direction of arrow "D" in FIG. 1 ) refer to a positional relationship in the vertical direction (a direction perpendicular to a horizontal plane) and indicate a relationship at ground level. Furthermore, the left-right direction or lateral direction refers to a transverse direction (width direction) of the machine body perpendicular to the longitudinal direction of the machine body. That is, "left" (the direction of arrow "L" in FIG. 2 ) and "right" (the direction of arrow "R" in FIG. 2 ) refer to the leftward and rightward directions of the machine body, respectively. This also applies to FIG. 3 and subsequent figures.

[0050] [Overall information about combine harvesters] As shown in FIG. 1, the traveling body 1 of the combine harvester comprises a body frame 2, which is formed by connecting a plurality of steel materials such as square pipes. A pair of left and right crawler-type traveling devices 3 are mounted on the lower part of the body frame 2. A riding section 5 is provided on the right side of the front of the traveling body 1. A passenger rides on the riding section 5. Note that since the combine harvester (work vehicle) of this embodiment is configured to be capable of automatic traveling and automatic steering, the passenger riding on the riding section 5 includes both a passenger who operates the combine harvester and a passenger who does not operate the combine harvester. An engine E is located below the riding section 5. The riding section 5 is not covered by a cabin and is open to the outside.

[0051] A reaping unit 4 is provided at the front of the traveling body 1 and is capable of being raised and lowered. The reaping unit 4 has multiple dividers 4a and multiple raising devices 4b. The reaping unit 4 harvests multiple rows of planted rice or wheat stalks (crops) in front of the traveling body 1 while raising them with the raising devices 4b, and transports the harvested stalks toward the rear of the machine body. A threshing device 6 and a grain tank 8 are supported side-by-side at the rear of the machine body frame 2. The threshing device 6 is located behind the reaping unit 4, and the grain tank 8 is located behind the riding unit 5. A feed chain 7 is provided on the left side of the threshing device 6, and the feed chain 7 clamps and transports the harvested stalks harvested by the reaping unit 4 toward the rear. The threshing device 6 threshes the harvested stalks and then separates them into grains and dust. The grain tank 8 stores the grains that have been threshed and transported from the threshing device 6. A transport device 9 that removes the grains from the grain tank 8 is connected to the rear of the grain tank 8.

[0052] The conveying device 9 is equipped with a vertical conveying section 9A and a horizontal conveying section 9B. The vertical conveying section 9A is connected to the rear lower section of the grain tank 8 and vertically conveys the grains stored in the grain tank 8. The horizontal conveying section 9B is connected to the upper end of the vertical conveying section 9A and feeds the grains from the vertical conveying section 9A horizontally. A discharge outlet 9C is provided at the downstream end in the conveying direction of the horizontal conveying section 9B. The horizontal conveying section 9B conveys the grains from the vertical conveying section 9A to the discharge outlet 9C and discharges them from the discharge outlet 9C to the outside of the machine.

[0053] The horizontal conveying section 9B is configured to be able to move up and down and to rotate left and right. As shown in Figures 1 and 2, when the conveying device 9 is not in use, the horizontal conveying section 9B is positioned above the threshing device 6 and the grain tank 8, and extends forward and backward while spanning the center of the machine body in a plan view. The state of the horizontal conveying section 9B in this state is referred to as the "storage state." The position of the horizontal conveying section 9B in this state is referred to as the "home position."

[0054] When the conveying device 9 is in use, the lateral conveying section 9B can extend from its stored state in the home position to the outside of the machine body to discharge grain. Here, "outside of the machine body" means to the left of the left side of the threshing device 6 (lateral outside of the machine body), to the right of the right side of the grain tank 8 (lateral outside of the machine body), and behind the rear ends of the threshing device 6 and the grain tank 8. In other words, when the conveying device 9 is in use, the lateral conveying section 9B extends to the left or right side or rearward from the traveling machine body 1 to discharge grain stored in the grain tank 8.

[0055] The combine harvester of this embodiment is equipped with a satellite positioning receiver 20. The receiver 20 receives signals from GNSS (Global Navigation Satellite Systems, such as GPS, GLONASS, Galileo, QZSS, and BeiDou) from navigation satellites (not shown) to acquire the vehicle's position. The receiver 20 is located on the left side of the vehicle body (one side in the left-right direction) with respect to the lateral center of the riding section 5.

[0056] As shown in Figures 1, 3, and 4, the receiving device 20 receives signals from navigation satellites located within a reception area Ra set in an area closer to the zenith than a preset elevation angle θ relative to the horizontal direction. The area indicated by the elevation angle θ is the lower limit boundary of the reception area Ra of the receiving device 20. Note that an inertial navigation unit (not shown) incorporating a gyro acceleration sensor and a magnetic direction sensor is provided to complement satellite navigation based on signals received by the receiving device 20. The elevation angle θ is set to, for example, 15°, but can be changed as appropriate within a range of, for example, 10° to 30°.

[0057] [Boarding section] The boarding section 5 is provided in a state that it is biased to the right side of the aircraft body with respect to the center of the aircraft body. As shown in Figures 1 to 4, the boarding section 5 is provided with a seat 11, a front panel 12 located in front of the seat 11, and a side panel 13 located to the left of the seat 11. The seat 11 is provided in the central region of the boarding section 5. A passenger sits on the seat 11. A floor section 15 (Figure 3) is provided between the front panel 12 and the seat 11 in the front-to-rear direction. A boarding / alighting step 14 is provided to the right of the seat 11 and the floor section 15. The side panel 13 is provided on the side of the boarding section 5 opposite to the side where the boarding / alighting step 14 is located.

[0058] The front panel 12 is provided with a steering lever 16 and a meter panel (not shown). The steering lever 16 is an operating tool for driving operations, and is provided at the right end of the front panel 12, located in front of the seat 11. A passenger sitting on the riding section 5 can steer the traveling device 3 by operating the steering lever 16. The passenger can also raise and lower the reaping section 4 by operating the steering lever 16. In other words, the steering lever 16 accepts steering operations and work operations. For example, the traveling speed, engine RPM, remaining fuel level, etc. are displayed on the meter panel (not shown). The steering lever 16 corresponds to the "second operating tool" of the present invention.

[0059] The side panel 13 is provided with a main speed change operation lever 18 and other components. The main speed change operation lever 18 is located at the front of the side panel 13. The main speed change operation lever 18 is configured as a lever that can be operated to swing back and forth. A passenger sitting on the riding section 5 can change the speed of a main speed change device (not shown) by operating the main speed change operation lever 18.

[0060] A box-shaped rear box 40 is provided behind the seat 11. The rear box 40 protrudes above the seat surface of the seat 11. The upper surface of the rear box 40 is located at a height corresponding to the upper part of the backrest of the seat 11. Although not described in detail, the rear box 40 houses an air cleaner for intake to the engine E, an electronic control unit (so-called ECU), etc.

[0061] A canopy 41 is provided above the riding section 5. The canopy 41 covers the riding section 5 to provide shade and protection from rain. The canopy 41 has a cover section 41A and a frame section 41B. The cover section 41A covers the riding section 5 from above. The cover section 41A is made of, for example, resin. The frame section 41B is made of metal. The frame section 41B is supported by the traveling vehicle body 1 via telescopic struts 42, and supports the cover section 41A in a state where it overlaps with the cover section 41A in a plan view of the vehicle.

[0062] The canopy 41 is supported by a telescopic strut 42. The telescopic strut 42 supports the frame portion 41B. A handle 42H is provided on the telescopic strut 42. For example, when a rider operates the handle 42H, the telescopic strut 42 extends and retracts in the vertical direction, thereby changing the height position of the canopy 41. As shown in FIGS. 3 and 4 , the telescopic strut 42 supports the canopy 41 so that the position can be changed between a preset low position Lp and a preset high position Hp above the low position Lp. In other words, the telescopic strut 42 allows the position of the canopy 41 to be changed between the low position Lp and the high position Hp. Note that in FIGS. 3 and 4 , the low position Lp and the high position Hp are height positions based on the upper end of the canopy 41. Note that as long as the height difference ΔH between the low position Lp and the high position Hp is constant, the low position Lp and the high position Hp may be based on any position on the canopy 41. When the upper end of the canopy 41 is located at the high position Hp, the upper end of the canopy 41 is located above the upper end of the receiving device 20.

[0063] The frame portion 41B is made of metal. Metal has the property of reflecting radio waves. Therefore, if the frame portion 41B reflects radio waves from a navigation satellite, there is a risk that the receiving device 20 will not be able to accurately receive the signal from the navigation satellite. In this embodiment, the canopy 41 is positioned so that the frame portion 41B is located outside the range of the receiving area Ra of the receiving device 20.

[0064] FIG. 5 is a plan view of the canopy 41 when it is positioned at the high position Hp by the telescopic struts 42. The portion of the canopy 41 that is located within the range of the receiving area Ra of the receiving device 20 is indicated by the hatched area R1 in FIG. 5. In FIGS. 1, 3, and 4, the frame portion 41B appears to be located within the range of the receiving area Ra, but in reality, as shown in FIG. 5, only the front portion of the cover portion 41A of the canopy 41 is located within the range of the receiving area Ra, and the frame portion 41B is located outside the range of the receiving area Ra. In this way, the high position Hp is set so that the frame portion 41B is located in an area below the lower boundary of the receiving area Ra of the receiving device 20. As a result, the frame portion 41B is no longer located within the range of the receiving area Ra.

[0065] A fulcrum portion 42B is provided at the upper end of the telescopic strut 42. The fulcrum portion 42B supports the canopy 41 so that it can rotate about the vertical axis Y1. Figure 2 shows the swing range of the canopy 41. The canopy 41 can swing about the vertical axis Y1 between a position covering the boarding section 5 and a position behind the boarding section 5. The position where the canopy 41 covers the boarding section 5 is referred to as the "covered position." Additionally, the position where the canopy 41 is located behind the boarding section 5 is referred to as the "uncovered position." The telescopic strut 42 is configured so that the position of the canopy 41 can be changed between a covered position where it overlaps with the seat 11 in a plan view of the aircraft, and a uncovered position where it does not overlap with the seat 11 in a plan view of the aircraft.

[0066] When the canopy 41 swings around the vertical axis Y1, the free end of the canopy 41 swings outward laterally from the fuselage. In Figure 2, the movement trajectory of the free end of the canopy 41 when the canopy 41 swings around the vertical axis Y1 is shown as a free end trajectory Rb. The movement trajectory of the canopy 41 is an area surrounded by the free end trajectory Rb and the vertical axis Y1.

[0067] This avoids the risk of the canopy 41 interfering with other parts of the combine harvester, compared to a configuration in which the free end of the canopy 41 swings laterally inward of the vehicle body. In particular, interference between the canopy 41 and the receiving device 20 is avoided. The canopy 41 does not overlap with the receiving device 20 in a plan view, either in the position covering the riding section 5 or in the position behind the riding section 5. Furthermore, even when the canopy 41 swings around the vertical axis Y1, the canopy 41 does not overlap with the receiving device 20 in a plan view. In other words, the movement trajectory of the canopy 41 when moving between the covered position and the uncovered position does not overlap with the receiving device 20 in a plan view of the vehicle body.

[0068] In this embodiment, the area on the zenith side of an elevation angle of 15 degrees relative to the horizontal direction is the reception area Ra of the receiving device 20. The receiving device 20 receives signals from navigation satellites located within the range of this reception area Ra. The canopy 41 is positioned so that the frame portion 41B is located outside the range of the reception area Ra, even when the telescopic struts 42 are extended to their highest position and the canopy 41 is set to its highest position.

[0069] [Regarding the receiving device support structure] In this embodiment, the receiving device 20 is supported by a swingable support frame 25, and the receiving device 20 and the swingable support frame 25 are swingably supported by a support frame 21. The support frame 21, which supports the receiving device 20 and the swingable support frame 25, is provided with front and rear frame members 22, vertical frame members 23, and horizontal frame members 24. The swingable support frame 25 corresponds to the "first support frame" of the present invention. The support frame 21 corresponds to the "second support frame" of the present invention. The vertical frame members 23 correspond to the "first frame members" of the present invention. The front and rear frame members 22 correspond to the "second frame members" of the present invention. The horizontal frame members 24 correspond to the "third frame members" of the present invention.

[0070] The front and rear frame members 22 extend in the front-to-rear direction in a plan view of the aircraft. The vertical frame members 23 extend in the up-down direction. Furthermore, the vertical frame members 23 support the swing support frame 25 and the fulcrum member 26 at their upper parts. The front and rear frame members 22 are connected to the upper parts of the vertical frame members 23 and extend horizontally or approximately horizontally from the vertical frame members 23. In other words, the front ends of the front and rear frame members 22 are connected to the upper ends of the vertical frame members 23. The horizontal frame members 24 extend horizontally in a plan view of the aircraft. The horizontal frame members 24 are connected to the front lower parts of the vertical frame members 23.

[0071] The support frame 21 is formed into an L-shape in a plan view by front and rear frame members 22, vertical frame members 23, and horizontal frame members 24. The support frame 21 is also formed into a gate-like shape by the front and rear frame members 22 and the vertical frame members 23 in a side view of the aircraft body.

[0072] As shown in Fig. 3, a swinging support frame 25 is pivotally supported at the connection portion between the front and rear frame members 22 and the vertical frame members 23. The receiving device 20 is attached to the free end of the swinging support frame 25. A fulcrum member 26 is connected and fixed by a bolt to the connection portion between the front and rear frame members 22 and the vertical frame members 23. The swinging support frame 25 is supported by the front and rear frame members 22 and the vertical frame members 23 via the fulcrum member 26, and also connects and supports the receiving device 20.

[0073] The state in which the swaying support frame 25 is swung upward is shown by the solid line in Fig. 1, and at this time, the position of the receiving device 20 is the use position. Also, the state in which the swaying support frame 25 is swung downward is shown by the dashed line in Fig. 1, and at this time, the position of the receiving device 20 is the storage position.

[0074] The receiving device 20 is configured to be movable between a preset storage position and a preset usage position above the storage position. Specifically, the pivot pin of the swing support frame 25 fits into the boss hole of the fulcrum member 26, and the swing support frame 25 swings around the horizontal axis X1 of the pivot pin. That is, the swing support frame 25 and the fulcrum member 26 swing the receiving device 20 between the storage position and the usage position. In other words, the swing support frame 25 and the fulcrum member 26 allow the position of the receiving device 20 to be changed between the storage position and the usage position. With this configuration, the support frame 21 supports the receiving device 20 so that its position can be changed between the storage position and the usage position. As a result, the receiving device 20 is configured to be movable from the usage position to the storage position by swinging forward.

[0075] The angular difference between the extension direction of the swaying support frame 25 when the receiving device 20 is located in the storage position and the extension direction of the swaying support frame 25 when the receiving device 20 is located in the use position is 90 degrees or approximately 90 degrees (for example, 89 to 91 degrees).

[0076] When the receiving device 20 is located in the use position, the receiving device 20 is less susceptible to the effects of multipath and the like compared to when the receiving device 20 is located in the storage position, and the positioning accuracy of the receiving device 20 during harvesting work is improved. Furthermore, when the receiving device 20 is located in the storage position, interference between the ceiling and the receiving device 20 is avoided even if the ceiling of the storage shed where the combine is kept is low.

[0077] When the receiving device 20 is located in the use position, it is located forward of the riding section 5. Furthermore, as shown in FIG. 2, the receiving device 20 overlaps with the reaping section 4 in a plan view and is located at the center of the left-right width of the reaping section 4, whether it is located in the use position or the storage position. As shown in FIGS. 1 and 2, the receiving device 20 is located within the range of the front-to-rear width W between the tip of the divider 4a and the rear of the lifting device 4b (the upper end of the lifting device 4b in FIGS. 1 and 2). The receiving device 20 is located within the range of this front-to-rear width W, whether it is located in the use position or the storage position.

[0078] When positioned in the use position, the receiving device 20 is located on the left side of the aircraft body relative to the boarding section 5. When positioned in the use position, the receiving device 20 is located almost entirely in front of the canopy 41. Note that when positioned in the use position, the receiving device 20 may be located entirely in front of the canopy 41. Furthermore, when positioned in the use position, the receiving device 20 does not overlap with the canopy 41 in a plan view of the aircraft body. In addition, when positioned in the use position, the receiving device 20 does not overlap with the horizontal conveying section 9B in the stored state in a plan view of the aircraft body.

[0079] 1, when the receiving device 20 is in the use position, the receiving device 20 is located at a position higher than the upper end of the horizontal conveying section 9B in the stored state. Also, when the receiving device 20 is in the stored position, the entire receiving device 20 is located below the upper end of the horizontal conveying section 9B of the conveying device 9 in the stored state. Alternatively, when the receiving device 20 is in the stored position, the upper end of the receiving device 20 may be located at the same height as or approximately the same height as the upper end of the horizontal conveying section 9B in the stored state. When the receiving device 20 is in the stored position, it is located further rearward of the machine body than the horizontal conveying section 9B in the stored state.

[0080] When the receiving device 20 is located in the storage position, the upper end of the receiving device 20 is located at the same or approximately the same height as the upper end of the support frame 21 (specifically, the upper end of the front and rear frame members 22). Alternatively, when the receiving device 20 is located in the storage position, the upper end of the receiving device 20 may be located lower than the upper end of the support frame 21 (specifically, the upper end of the front and rear frame members 22).

[0081] The front and rear frame members 22 and the vertical frame member 23 are supported on the left side of the riding section 5. In other words, the riding section 5 is provided in a state where it is biased to the right side of the body relative to the center of the body, and the front and rear frame members 22 are supported on the end of the riding section 5 on the left-right center side of the body. When located in the usage position, the receiving device 20 is located on the left side of the body relative to the riding section 5. The front portions of the front and rear frame members 22 extend horizontally and in the front-to-rear direction. When viewed from the side of the body, the front portions of the front and rear frame members 22 overlap with the lateral conveying section 9B in the stored state (see Figure 1).

[0082] The front and rear frame members 22 have a rod portion 22a extending in the front-rear direction, a square plate member 22b at the front end, and a square plate member 22c at the rear end. The square plate member 22b is welded to the front end of the rod portion 22a. The square plate member 22c is welded to the rear end of the rod portion 22a. A middle portion between the front and rear of the rod portion 22a is bent. The bottom surface of the square plate member 22c is connected to the upper surface of the rear box 40 with bolts. In other words, the front and rear frame members 22 are supported on the upper surface of the rear box 40. As a result, the rear portion of the rod portion 22a is tilted downward toward the rear. In other words, the rod portion 22a extends horizontally or approximately horizontally from the vertical frame member 23 and is tilted downward toward the rear at its rear. In other words, the rear portion of the rod portion 22a is erected in a forward-leaning position on the left side of the rear of the passenger section 5. The rear of the rod portion 22a is inclined downward toward the rear and is positioned more to the right of the fuselage as it approaches the front in a plan view, thereby preventing interference between the rod portion 22a and the canopy 41. The rectangular plate member 22c corresponds to the "second member" of the present invention.

[0083] The horizontally extending front portion of the rod portion 22a and the square plate member 22b do not overlap with the canopy 41 in the covered state in a plan view of the aircraft. Furthermore, the upper portion of the vertical frame member 23, the swinging support frame 25, and the fulcrum member 26 do not overlap with the canopy 41 in the covered state in a plan view of the aircraft. The lower portion of the vertical frame member 23 and the horizontal frame member 24 are located below the canopy 41 located at the low position Lp. Furthermore, the portion of the support frame 21 that overlaps with the canopy 41 located at the covered position in a plan view of the aircraft does not interfere with either the movement trajectory when the height of the canopy 41 is at the low position Lp or the movement trajectory when the height of the canopy 41 is at the high position Hp.

[0084] The vertical frame member 23 has a rod portion 23a extending vertically, a rectangular plate member 23b at the upper end, and a rectangular member 23c at the lower end. The rectangular member 23c is welded to the lower end of the rod portion 23a. The rectangular plate member 23b is welded to the upper end of the rod portion 23a. The left side portion of the rectangular member 23c, which extends longitudinally on the left side of the vehicle body, is bolted to the left side portion of the front of the side panel 13. In other words, the vertical frame member 23 is supported on the left side of the riding section 5 (the end of the riding section 5 toward the center of the vehicle body). The rod portion 23a is erected in an inclined position (forward leaning position) so that its upper end is positioned closer to the front of the vehicle body. The rectangular plate member 22b of the front and rear frame members 22 and the rectangular plate member 23b of the vertical frame member 23 are bolted together. At this time, the lower surface of the rectangular plate member 22b and the upper surface of the rectangular plate member 23b abut against each other. The square member 23c corresponds to the "first member" of the present invention.

[0085] The left side surface portion of the rectangular member 23c on the left side of the fuselage extends vertically and also front-to-rear. A triangular portion is formed on this left side surface portion. The rear edge of this triangular portion is welded to the rod portion 23a from top to bottom. In other words, the vertical frame member 23 is inclined so that the upper portion is positioned closer to the front of the fuselage, and the rectangular member 23c is formed so that its front-to-rear width increases toward the lower portion in a side view of the fuselage. The distance between the front end of the rectangular member 23c and the rear end of the rectangular member 23c increases toward the lower portion. This increases the rigidity of the rod portion 23a.

[0086] In a plan view, the rectangular member 23c is bent into an L-shape. The front end portion of the rectangular member 23c, which is bent into an L-shape in a plan view, extends from the bent portion to the right side of the aircraft body. The front end portion of the rectangular member 23c has a front surface portion facing forward. This front end portion extends vertically up and down and also extends left and right.

[0087] In addition, a horizontally extending flat surface portion is formed on the upper portion of the rectangular member 23c. This flat surface portion is rectangular in plan view and connects to the upper ends of the front end portion and left side surface portion of the rectangular member 23c, which are bent and formed into an L-shape in plan view. This horizontally extending flat surface portion extends both forward and backward and left and right. The rectangular member 23c is bent and formed into an L-shape in plan view, and the side portion on the left side of the aircraft body of the rectangular member 23c is formed into a triangular shape in side view of the aircraft body. Furthermore, a flat surface portion connecting the front end portion and the left side surface portion is provided on the upper portion of the rectangular member 23c. This results in the rectangular member 23c being formed in an entire box shape, thereby increasing the overall rigidity of the rectangular member 23c. As a result, the rigidity of the rod portion 23a is increased.

[0088] In this way, the rectangular members 23c that reinforce the vertical frame members 23 are provided at the lower ends of the vertical frame members 23. Note that the rectangular members 23c may be provided at the portions above the lower ends of the vertical frame members 23, i.e., at the lower parts of the vertical frame members 23.

[0089] The rod portions 23a of the vertical frame members 23 and the rear portions of the rod portions 22a of the front and rear frame members 22 are arranged side by side in the fore-and-aft direction of the fuselage, so that the front portions of the rod portions 22a of the front and rear frame members 22 extend along the fore-and-aft direction of the fuselage.

[0090] The horizontal frame member 24 includes a rod portion 24a, a handrail frame portion 24b for passengers boarding and disembarking through the boarding / alighting entrance 5A, a square plate member 24c at the right end of the aircraft body, and a flat plate member 24d at the left end of the aircraft body. The rod portion 24a extends laterally in a plan view of the aircraft body. The rod portion 24a is L-shaped in a front and rear view of the aircraft body. The rod portion 24a extends to both the left and right ends of the front panel 12 and extends downward from the right end. The left end of the rod portion 24a is welded to the flat plate member 24d. The flat plate member 24d corresponds to the "third member" of the present invention. The square plate member 24c corresponds to the "fourth member" of the present invention. The rod portion 24a corresponds to the "rod portion" of the present invention. The handrail frame portion 24b corresponds to the "handrail" of the present invention.

[0091] The flat plate members 24d of the horizontal frame members 24 are connected with bolts to the front portions of the square members 23c of the vertical frame members 23. In other words, the vertical frame members 23 and the horizontal frame members 24 are connected to each other at their flat surface portions. This allows the vertical frame members 23 and the horizontal frame members 24 to be firmly connected with a simple configuration. That is, flat surface portions are formed on each of the square members 23c and the flat plate members 24d, and the square members 23c and the flat plate members 24d are connected to each other with their respective flat surface portions flush with each other.

[0092] The square plate member 24c is formed by bending a flat plate member. The upper end of the square plate member 24c is bent into an L-shape when viewed from the front and rear of the aircraft. The square plate member 24c is connected to the rod portion 24a and the handrail frame portion 24b at the right end of the horizontal frame member 24. An upper surface portion is formed at the upper end of the square plate member 24c. The right end of the rod portion 24a is welded to the upper surface portion of the square plate member 24c. In addition, the handrail frame portion 24b is welded to the square plate member 24c. As a result, the handrail frame portion 24b is provided at the right end of the horizontal frame member 24.

[0093] The handrail frame portion 24b is connected to the outer side end portion of the front panel 12. That is, the right end portion of the horizontal frame member 24 is supported by the outer side end portion of the front panel 12 in the boarding section 5, and is adjacent to the boarding / alighting opening 5A of the boarding section 5.

[0094] In this way, the horizontal frame members 24 are connected to the lower portions of the vertical frame members 23 of the front and rear frame members 22 and to the outer lateral end portions of the front panel 12 of the fuselage, and extend along the left-right direction of the fuselage. As a result, the front and rear frame members 22 and the vertical frame members 23 are firmly supported by the horizontal frame members 24.

[0095] The horizontal frame member 24 is located forward of the steering operation lever 16. The horizontal frame member 24 is also located below the upper end of the steering operation lever 16. Therefore, when monitoring the field in front of the vehicle, a passenger seated in the seat 11 can easily check the field without being concerned about the horizontal frame member 24.

[0096] The irradiation unit 32 is also supported by the rectangular plate member 24c. The irradiation unit 32 illuminates the area around the front right portion of the vehicle. The irradiation unit 32 is also swingable around the vertical axis Y2. Therefore, for example, when an operator rotates the irradiation unit 32 backward, the irradiation unit 32 can illuminate the area around the right side of the boarding section 5. In other words, the irradiation unit 32 is supported by the rectangular plate member 24c so as to be swingable back and forth, and can illuminate the area in front of the vehicle and the area around the boarding / alighting opening 5A. When the irradiation unit 32 illuminates the area in front of the vehicle, the right end of the horizontal frame member 24 is positioned laterally outward of the vehicle relative to the irradiation unit 32. Therefore, the horizontal frame member 24 also serves as a protective member for protecting the irradiation unit 32.

[0097] An automatic driving operation unit 31 is bolted to the horizontal frame member 24. In other words, the automatic driving operation unit 31 is supported by the horizontal frame member 24. Although not shown, the combine harvester of this embodiment has a control device for executing automatic driving and automatic steering. The automatic driving operation unit 31 accepts manual operation to output commands to the control device. The automatic driving operation unit 31 is provided with multiple buttons related to automatic steering and automatic driving. Therefore, for example, a rider can operate the automatic driving operation unit 31 to cause the combine harvester (work vehicle) to perform automatic steering or automatic driving. Note that the control device may be configured to perform at least one of automatic driving and automatic steering. The automatic driving operation unit 31 corresponds to the "first operating tool" of the present invention.

[0098] The automatic driving operation unit 31 is disposed laterally outward and forward of the vehicle body relative to the steering operation lever 16. In a plan view of the vehicle body, the automatic driving operation unit 31 does not overlap with the canopy 41, which is positioned in the cover position. In a plan view of the vehicle body, the automatic driving operation unit 31 and the irradiation unit 32 overlap.

[0099] [Regarding the swing support structure and position holding structure of the receiving device] 6 to 8, the swing support structure and position holding structure of the receiving device 20 will be described. The fulcrum member 26 swingably supports the swing support frame 25. The fulcrum member 26 has a boss hole, into which the rotation pin of the swing support frame 25 is inserted. This allows the swing support frame 25 to swing around the horizontal axis X1 of the rotation pin.

[0100] The swing support frame 25 has a rod portion 25a, a plate portion 25b, and a bracket portion 25c. The plate portion 25b is welded to one end of the rod portion 25a. The bracket portion 25c is welded to the other end of the rod portion 25a. The receiving device 20 is fixed with bolts to the flat surface portion of the plate portion 25b. When the receiving device 20 is in the storage position, the flat surface portion of the plate portion 25b faces forward. When the receiving device 20 is in the usage position, the flat surface portion of the plate portion 25b faces upward.

[0101] The pivot pin of the swing support frame 25 is welded to the bracket portion 25c. The swing operation mechanism 27 is connected to the bracket portion 25c between the welded portion of the rod portion 25a and the welded portion of the swing pin. The swing operation mechanism 27 has a leaf spring portion 27a, a handle support portion 27b, and an operation handle 27c. One end of the leaf spring portion 27a is connected to the bracket portion 25c with a bolt, and the other end of the leaf spring portion 27a is connected to the handle support portion 27b with a bolt. Furthermore, the operation handle 27c is connected to the free end of the handle support portion 27b. This allows the receiving device 20, the swing support frame 25, and the swing operation mechanism 27 to swing integrally. The operation handle 27c extends toward the left-right center of the riding portion 5 relative to the swing support frame 25 and the fulcrum member 26. The leaf spring portion 27a corresponds to the "leaf spring" and "elastic body" of the present invention.

[0102] The operating handle 27c swings integrally with the receiving device 20 around the horizontal axis X1, which is the swing axis of the receiving device 20. For example, when a passenger swings the operating handle 27c counterclockwise in Figure 6, the receiving device 20 and the swing support frame 25 swing upward, and the position of the receiving device 20 becomes the use position. When the receiving device 20 is located in the use position, the operating handle 27c is located directly or approximately directly below the horizontal axis X1 as viewed in the axial direction of the horizontal axis X1.

[0103] 6, the receiving device 20 and the swing support frame 25 swing downward, and the receiving device 20 moves to the storage position. When the receiving device 20 is in the storage position, the operating handle 27c is positioned at the same or approximately the same height as the horizontal axis X1.

[0104] In this embodiment, a locking member 28 is provided to hold the receiving device 20 in both the storage position and the use position. The locking member 28 is connected to the right side surface of the square plate member 23b of the vertical frame member 23 by a bolt.

[0105] The locking member 28 is provided with a support surface portion 28a, a first locking portion 28b, a second locking portion 28c, and a surface portion 28d. The support surface portion 28a is formed flat and abuts against the right side portion of the square plate member 23b of the vertical frame member 23. The first locking portion 28b protrudes from the upper rear portion of the support surface portion 28a toward the right side of the vehicle (the opposite side to the side where the square plate member 23b is located). The first locking portion 28b has a flat surface portion extending horizontally. The second locking portion 28c protrudes from the lower front portion of the support surface portion 28a toward the right side of the vehicle (the opposite side to the side where the square plate member 23b is located). The second locking portion 28c has a flat surface portion extending vertically. The surface portion 28d extends between the first locking portion 28b and the second locking portion 28c.

[0106] The leaf spring portion 27a and the handle support portion 27b are formed in a flat plate shape. As shown in Figures 7 and 8, the leaf spring portion 27a and the handle support portion 27b are located between the support surface portion 28a and the surface portion 28d in a front view and a plan view. The leaf spring portion 27a is interposed between the operating handle 27c and the holding mechanism LK (described later).

[0107] A first hole portion 28h is formed in the surface portion 28d near the first locking portion 28b. Furthermore, a second hole portion 28i is formed in the surface portion 28d near the second locking portion 28c. The first hole portion 28h is adjacent to the lower side of the first locking portion 28b. Furthermore, the second hole portion 28i is adjacent to the rear side of the second locking portion 28c. The phase difference between the first hole portion 28h and the second hole portion 28i with respect to the horizontal axis X1 is 90 degrees or approximately 90 degrees (for example, 89 to 91 degrees). The first hole portion 28h corresponds to the "second engagement portion" of the present invention. The second hole portion 28i corresponds to the "third engagement portion" of the present invention.

[0108] An engagement pin 27d is provided in the handle support portion 27b between the connecting portion for the leaf spring portion 27a and the connecting portion for the operating handle 27c. The engagement pin 27d protrudes from the handle support portion 27b to the right of the machine body. The engagement pin 27d can be selectively fitted into (engaged with) the first hole portion 28h and the second hole portion 28i. The engagement pin 27d, the first hole portion 28h, and the second hole portion 28i form a holding mechanism LK. The holding mechanism LK holds the swing support frame 25 in either a state where the receiving device 20 is in the storage position or a state where the receiving device 20 is in the use position. That is, the first hole portion 28h engages with the engagement pin 27d to hold the receiving device 20 in the storage position. The second hole portion 28i engages with the engagement pin 27d to hold the receiving device 20 in the use position. The leaf spring portion 27a biases the holding mechanism LK to a position-holding state. The engagement pin 27d corresponds to the "first engagement portion" of the present invention.

[0109] When the receiving device 20 is in the storage position, at least one of the leaf spring portion 27a and the handle support portion 27b abuts against the first locking portion 28b, and the engagement pin 27d fits into (engages with) the first hole portion 28h. At this time, the engagement pin 27d is biased by the leaf spring portion 27a in the direction of fitting into (engaging with) the first hole portion 28h. This prevents the swinging support frame 25 from swinging, and the receiving device 20 is held in the storage position. In other words, when the engagement pin 27d engages with the first hole portion 28h, the swinging support frame 25 is held in a position where the receiving device 20 is in the storage position.

[0110] When the receiving device 20 is in the use position, at least one of the leaf spring portion 27a and the handle support portion 27b abuts against the second locking portion 28c, and the engagement pin 27d fits into (engages with) the second hole portion 28i. At this time, the engagement pin 27d is urged by the leaf spring portion 27a in the direction of fitting into (engaging with) the second hole portion 28i. This prevents the swinging support frame 25 from swinging, and the position of the receiving device 20 is held in the use position. In other words, when the engagement pin 27d engages with the second hole portion 28i, the swinging support frame 25 is held in a position where the receiving device 20 is in the use position.

[0111] When changing the position of the receiving device 20 from the storage position to the use position, the passenger first presses the operating handle 27c toward the left of the vehicle body. Then, the free end of the leaf spring portion 27a elastically deforms toward the left of the vehicle body, and the handle support portion 27b and the operating handle 27c are displaced toward the left of the vehicle body. This causes the engagement pin 27d to come out of the first hole portion 28h. Next, the passenger swings the operating handle 27c forward. At this time, the free end of the leaf spring portion 27a remains elastically deformed toward the left of the vehicle body. At this time, the engagement pin 27d may be in sliding contact with the left side surface portion of the surface portion 28d.

[0112] When the receiving device 20 is positioned at the use position, at least one of the leaf spring portion 27a and the handle support portion 27b abuts against the second locking portion 28c. This restricts the counterclockwise swing of the swing support frame 25 in FIG. 6. Furthermore, the engaging pin 27d is fitted into the second hole portion 28i by the biasing force of the leaf spring portion 27a. This restricts the clockwise swing of the swing support frame 25 in FIG. 6. In other words, the holding mechanism LK is configured so that when the changing operation of changing the position of the receiving device 20 from the storage position to the use position is completed and the receiving device 20 is positioned at the use position, the engaging pin 27d and the second hole portion 28i are engaged by the biasing force of the leaf spring portion 27a.

[0113] When changing the position of the receiving device 20 from the use position to the storage position, the passenger first presses the operating handle 27c toward the left of the vehicle body. Then, the free end of the leaf spring portion 27a elastically deforms toward the left of the vehicle body, and the handle support portion 27b and the operating handle 27c are displaced toward the left of the vehicle body. This causes the engagement pin 27d to come out of the second hole portion 28i. Next, the passenger swings the operating handle 27c rearward. At this time, the free end of the leaf spring portion 27a remains elastically deformed toward the left of the vehicle body. At this time, the engagement pin 27d may be in sliding contact with the left side surface portion of the surface portion 28d.

[0114] When the receiving device 20 is positioned at the storage position, at least one of the leaf spring portion 27a and the handle support portion 27b comes into contact with the first locking portion 28b. This restricts the clockwise swing of the swing support frame 25 in FIG. 6. Furthermore, the engaging pin 27d is fitted into the first hole portion 28h by the biasing force of the leaf spring portion 27a. This restricts the counterclockwise swing of the swing support frame 25 in FIG. 6. In other words, the holding mechanism LK is configured so that when the changing operation of changing the position of the receiving device 20 from the use position to the storage position is completed and the receiving device 20 is positioned at the storage position, the engaging pin 27d and the first hole portion 28h are engaged by the biasing force of the leaf spring portion 27a.

[0115] With this configuration, the leaf spring portion 27a biases the holding mechanism LK so as to hold the receiving device 20 in position.

[0116] As described above, in this embodiment, the operating handle 27c is configured so that the direction of the operation for changing the position of the receiving device 20 is different from the direction of the operation for switching the holding mechanism LK. Therefore, by operating the operating handle 27c, it is possible to change the position of the receiving device 20 between the storage position and the use position and to switch the holding mechanism LK between a position holding state and a position holding release state. The passenger can release the position holding of the receiving device 20 simply by moving the operating handle 27c sideways, and can switch the position of the receiving device 20 between the storage position and the use position simply by moving the operating handle 27c forward or backward. In other words, in this embodiment, the passenger can change the position of the receiving device 20, hold the position, and release the position holding by simply operating the operating handle 27c continuously. That is, the operating handle 27c accepts a release operation that releases the position holding of the holding mechanism LK against the biasing force of the leaf spring portion 27a, and a change operation that changes the position of the receiving device 20 between the storage position and the use position.

[0117] [Another embodiment] The present invention is not limited to the configurations exemplified in the above-described embodiments, and other representative embodiments of the present invention will be exemplified below.

[0118] (1) Without being limited to the above-described embodiment, the right end of the horizontal frame member 24 may be supported by something other than the front panel 12. Alternatively, the horizontal frame member 24 does not have to be configured to extend across the left and right sides of the riding section 5, and may be configured to be connected to the left end of the riding section 5. In other words, the horizontal frame member 24 may be configured to be connected to the vertical frame member 23 and the end of the riding section 5 in the left-right direction of the aircraft body.

[0119] (2) Without being limited to the above-described embodiment, the receiving device 20 may be provided in a position offset to the right side of the aircraft body with respect to the left-right center of the riding section 5. In other words, the receiving device 20 may be provided in a position offset to one side in the left-right direction with respect to the left-right center of the riding section 5.

[0120] (3) In the above-described embodiment, the operating handle 27c extends toward the center of the left and right of the riding section 5 relative to the swing support frame 25 and the fulcrum member 26. However, this is not limited to this embodiment, and for example, the operating handle 27c may extend in a radial direction from the horizontal axis X1.

[0121] (4) The leaf spring portion 27a may be, for example, a coil spring. For example, the coil spring may be configured to bias the swing support frame 25 so as to hold the swing support frame 25 in either the storage position or the use position, with the dead center being the center region of the swing range of the swing support frame 25.

[0122] (5) The swingable support frame 25 may not swing. For example, instead of the swingable support frame 25, a slide mechanism that supports the receiving device 20 and is extendable and contractible up and down may be provided. In other words, the first support frame of the present application may be configured to slide and change its state between a state in which the receiving device 20 is in the storage position and a state in which the receiving device 20 is in the use position.

[0123] (6) In the above-described embodiment, the receiving device 20 is configured so that its position can be changed from the use position to the storage position by swinging the swing support frame 25 in a forward tilting direction. This embodiment is not limited to this. For example, the receiving device 20 may be configured so that its position can be changed from the use position to the storage position by swinging the swing support frame 25 in a backward tilting direction. Alternatively, the swing support frame 25 may be configured to swing, for example, around a longitudinal axis. For example, the receiving device 20 may be configured so that its position can be changed from the use position to the storage position by swinging the swing support frame 25 in the left-right direction toward the side where the boarding unit 5 is located. In addition, as long as the receiving device 20 is configured so as not to abut against the horizontal conveying unit 9B or other devices, the receiving device 20 may be configured so that its position can be changed from the use position to the storage position by swinging the swing support frame 25 in the left-right direction toward the side where the boarding unit 5 is located. In other words, the swing support frame 25 may be swung around a horizontal swing axis to change its state.

[0124] (7) The operating handle 27c is configured so that the direction of the position change operation of the receiving device 20 is different from the direction of the switching operation of the holding mechanism LK. This is not limited to this, and the operating handle 27c may be configured so that the direction of the position change operation of the receiving device 20 is the same as the direction of the switching operation of the holding mechanism LK. For example, the operating handle 27c may not be configured to include the engagement pin 27d that can be selectively fitted (engaged) into each of the first hole 28h and the second hole 28i. For example, the first locking portion 28b and the second locking portion 28c may each be provided with a friction clamping plate that clamps the handle support portion 27b with elastic force, and the rider may fit the handle support portion 27b into the friction clamping plate. With this configuration, the operating handle 27c is configured so that the direction of the position change operation of the receiving device 20 is the same as the direction of the switching operation of the holding mechanism LK.

[0125] (8) In the above-described embodiment, the steering operation lever 16 accepts both a steering operation and a work operation. However, the present invention is not limited to this, and the steering operation lever 16 may be configured to accept only one of a steering operation and a work operation.

[0126] The configurations disclosed in the above-described embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with the configurations disclosed in other embodiments, unless a contradiction arises. Furthermore, the embodiments disclosed in this specification are merely examples, and the present invention is not limited to these, and can be modified as appropriate within the scope of the present invention. [Industrial Applicability]

[0127] The present invention is applicable to work vehicles equipped with a receiving device that receives signals from satellites. Therefore, the present invention is not limited to the head-feeding combine harvester exemplified in this embodiment, but can also be applied to general-purpose combine harvesters, various harvesters (e.g., corn harvesters, sugarcane harvesters, potato harvesters, beet harvesters, carrot harvesters, etc.), tractors equipped with work devices, rice transplanters, fertilizer management machines, self-propelled spreaders, self-propelled mowers, etc. [Explanation of symbols]

[0128] 5: Boarding section 5A: Entrance / exit 8: Grain tank 9:Transportation device 9A: Vertical conveying section 9B: Horizontal conveying section 9C: Discharge port 11: Sheet 12: Front panel 16: Steering control lever (second operating tool) 20: Receiving device 21: Support frame (second support frame) 22: Frame member (second frame member of second support frame) 22c: Square plate member (second member of second frame member) 23: Vertical frame member (first frame member of second support frame) 23c: Square plate member (first member of first frame member) 24: Horizontal frame member (third frame member of second support frame) 24a: Rod portion (rod portion of third frame member) 24b: Handrail frame part (handrail of the third frame member) 24c: Square plate member (fourth member of the third frame member) 24d: Flat plate member (third member of third frame member) 25: Swing support frame (first support frame) 27a: Leaf spring part (leaf spring, elastic body) 27c: Operating handle 27d: Engagement pin (first engagement part of the holding mechanism) 28h: First hole portion (second engagement portion of the holding mechanism) 28i: Second hole portion (third engagement portion of the holding mechanism) 31: Automatic driving operation unit (first operation tool) 32: Irradiation unit 41B: Frame section LK: Holding mechanism

Claims

1. a receiving device for receiving signals from a satellite; a first support frame that supports the receiving device and is capable of changing the position of the receiving device between a preset storage position and a preset usage position that is located above the storage position; a holding mechanism that holds the first support frame in a state where the receiving device is positioned at the storage position and a state where the receiving device is positioned at the use position; a single operating handle supported by the first support frame and operated by human power; The work vehicle is capable of changing the position of the receiving device between the storage position and the use position and switching the holding mechanism between a position holding state and a position holding release state by operating the operating handle.

2. 2. The work vehicle according to claim 1, wherein the operating handle is configured so that a direction for operating the position of the receiving device is different from a direction for operating the holding mechanism to switch.

3. A boarding section is provided, the receiving device is provided at a position offset to one side in the left-right direction with respect to the left-right center of the riding section, The work vehicle according to claim 2 , wherein the operating handle extends toward the center of the riding portion from the left to the right relative to the first support frame.

4. 2. A work vehicle according to claim 1, further comprising an elastic body for urging said holding mechanism to said position-holding state.

5. 5. The work vehicle according to claim 4, wherein the elastic body is a leaf spring interposed between the operating handle and the holding mechanism.

6. the holding mechanism is provided with a first engagement portion provided on one of the operating handle and the first support frame, and a second engagement portion and a third engagement portion provided on the other of the operating handle and the first support frame, with which the first engagement portion can be selectively engaged; the second engagement portion corresponds to the storage position, and the third engagement portion corresponds to the use position; 2. The work vehicle of claim 1, wherein when the first engagement portion engages with the second engagement portion, the first support frame is held in a position where the receiving device is in the storage position, and when the first engagement portion engages with the third engagement portion, the first support frame is held in a position where the receiving device is in the use position.

7. The first support frame is swung around a horizontal swing axis to change its state, The storage position is set to a position lower and forward of the use position, 4. The work vehicle according to claim 3, wherein the operating handle is positioned rearward and upward when the receiving device is in the storage position compared to when the receiving device is in the use position.

8. The work vehicle according to claim 1 , wherein the first support frame is slidably moved to change its state.

9. a second support frame is provided to support the first support frame; The second support frame is provided with a first frame member that extends vertically and supports the first support frame at an upper portion thereof, 9. The work vehicle according to claim 1, wherein a first member for reinforcing the first frame member is provided at a lower portion of the first frame member.

10. the first frame member is inclined so that an upper side thereof is positioned closer to the front of the aircraft body, The work vehicle according to claim 9, wherein the first member is formed so that its front-to-rear width increases toward the bottom when viewed from the side of the vehicle body.

11. The second support frame is provided with a second frame member that is connected to an upper portion of the first frame member, extends from the first frame member in a horizontal or substantially horizontal direction, and is inclined downward at a rear portion thereof, The work vehicle according to claim 9, wherein a second member connected to a body is provided at a rear portion of the second frame member.

12. The second support frame includes a second frame member connected to an upper portion of the first frame member and extending from the first frame member in a horizontal or substantially horizontal direction; The work vehicle according to claim 9, wherein when the receiving device is located in the storage position, the receiving device is located at the same or approximately the same height as the upper end of the second frame member, or is located lower than the upper end of the second frame member.

13. The second support frame is provided with a third frame member extending in a lateral direction of the airframe in a plan view of the airframe, 10. The work vehicle according to claim 9, wherein a third member is provided at one end of the third frame member and is connected to the first frame member.

14. a flat surface portion is formed on each of the first member and the third member, The work vehicle according to claim 13, wherein the third member and the first member are connected to each other with the respective flat surface portions thereof flush with each other.

15. A boarding section having a boarding / alighting entrance is provided, The other end of the third frame member is supported by the boarding section and is adjacent to the boarding / alighting door, The work vehicle according to claim 13, wherein the other end of the third frame member is provided with a handrail for passengers getting on and off through the access door.

16. The third frame member is provided with a rod portion extending in the lateral direction of the airframe in a plan view of the airframe, and a fourth member connected at the other end to each of the rod portion and the handrail, The work vehicle according to claim 15, further comprising an illumination unit that is supported on at least one of the handrail and the fourth member so as to be swingable back and forth and that is capable of illuminating at least one of the front of the vehicle body and the area around the boarding / alighting opening.

17. a control device that executes at least one of automatic driving and automatic steering; a first operating tool that accepts a manual operation for outputting a command to the control device, The work vehicle according to claim 13, wherein the first operating tool is supported by the third frame member.

18. The vehicle is provided with a seat on which a passenger sits and a riding section having a front panel located in front of the seat, a second operating tool that receives at least one of a steering operation and a working operation is disposed on the front panel; the other end of the third frame member is connected to the fuselage lateral outer end of the front panel; The work vehicle according to claim 17, wherein the first operating tool is arranged laterally outboard of the vehicle body and forward of the second operating tool.

19. A conveying device is provided, which includes a vertical conveying section that vertically conveys grains stored in a grain tank that stores grains, and a horizontal conveying section that is connected to an upper end of the vertical conveying section and has a discharge port, and that horizontally conveys the grains from the vertical conveying section and discharges them from the discharge port, The horizontal conveying unit is configured to be able to move up and down and turn left and right, and is capable of extending outward from the machine body from a storage state in which it is stored in a home position spanning the center portion of the machine body in a plan view of the machine body to discharge grains, A work vehicle as described in any one of claims 1 to 8, wherein when the receiving device is located in the storage position, the upper end of the receiving device is located at the same or approximately the same height as the upper end of the horizontal conveying section in the storage state, or the entire receiving device is located lower than the upper end of the horizontal conveying section in the storage state.

20. The first support frame is swung around a horizontal swing axis to change its state, The work vehicle according to claim 19, wherein the receiving device is located rearward of the vehicle body relative to a front end of the lateral transport section in the stored state when the receiving device is located at the stored position.

Images