Work vehicles

Abstract

To improve safety of work with respect to an antenna unit in a configuration installed with the antenna unit in a height position of an upper part of a cabin.SOLUTION: A work vehicle includes: a cabin 30 covering an operation part 12; an antenna unit 60 installed in an upper part of a cabin left side face part 37 which is one of the right and left side face parts of the cabin 30; and a handrail part 100 installed in the cabin left side face part 37 and used for conducting work with respect to the antenna unit 60.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a work vehicle equipped with an antenna unit for receiving position information from a satellite. [Background technology]

[0002] Conventionally, work vehicles equipped with antenna units for receiving position information from satellites are known (see, for example, Patent Document 1). Patent Document 1 discloses a configuration in which the antenna unit includes a receiving device such as a GNSS (Global Navigation Satellite System) receiver that receives radio waves related to position information from positioning satellites, a computing device that calculates position data based on the radio waves received by the receiving device, and a wireless communication device that transmits the position data calculated by the computing device, and these devices are housed in a case.

[0003] In the configuration disclosed in Patent Document 1, the antenna unit is disposed on the upper part of the side of the cabin that covers the driver's section of a combine harvester used as a work vehicle. Specifically, the case of the antenna unit is supported via a support frame on the left part of the roof of the cabin, which is the upper part of the left side of the cabin. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6688545 Summary of the Invention [Problem to be solved by the invention]

[0005] In a configuration such as that disclosed in Patent Document 1, in which the antenna unit is provided on the upper part of the side of the cabin, such as the side of the cabin roof, the antenna unit is located in a high position, so when removing the antenna unit, adjusting its position, performing maintenance, etc., the worker must stand on a platform, stepladder, etc. Working while standing on a platform, stepladder, etc. raises safety concerns.

[0006] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a work vehicle that can improve the safety of working with an antenna unit in a configuration in which the antenna unit is installed at a height position above the cabin. [Means for solving the problem]

[0007] The work vehicle of the present invention is a work vehicle equipped with a cabin that covers the driver's section, and is equipped with an antenna unit provided on the upper part of one of the left and right side sections of the cabin, and a handrail section provided on the one side section and used to perform work on the antenna unit.

[0008] In the work vehicle according to the present invention, the antenna unit and the handrail portion are arranged so as to be positioned in front of and behind each other in a plan view.

[0009] The work vehicle of the present invention is provided with a support member that is provided on one of the side portions of the work vehicle and supports the antenna unit, the support member being configured to extend forward and backward and having its front and rear ends fixed to one of the side portions, and the handrail portion being configured to extend vertically and having its upper end connected to the support member and its lower end fixed to one of the side portions.

[0010] In the work vehicle of the present invention, the cabin is rotatable about an axis in the vertical direction relative to the running body so as to open outward in the left-right direction of the work vehicle's body, and the one side portion is the side portion of the left and right side portions of the cabin that is located inside the left-right direction of the body.

[0011] In the work vehicle of the present invention, the handrail portion is made of a metal part and is arranged so that its upper end is positioned at a height below the antenna unit.

[0012] In the work vehicle of the present invention, the antenna unit is arranged so that its position can be changed between a first height position in which the entire antenna unit is positioned above the support member, and a second height position in which at least a portion of the antenna unit is overlapped with the support member.

[0013] The work vehicle of the present invention is provided with an antenna for acquiring information for the antenna unit, and the antenna is provided at the connection portion of the handrail portion to the support member. [Effects of the Invention]

[0014] According to the present invention, in a configuration in which an antenna unit is provided at a height position above the cabin, the safety of work on the antenna unit can be improved. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a left side view of a combine harvester according to an embodiment of the present invention. FIG. [Figure 2] FIG. 1 is a right side view of a combine harvester according to an embodiment of the present invention. [Figure 3] 1 is a plan view of a combine harvester according to an embodiment of the present invention. [Figure 4] FIG. 2 is a left side view of a cabin according to an embodiment of the present invention. [Figure 5] FIG. 2 is a front view of a cabin according to an embodiment of the present invention. [Figure 6] FIG. 2 is a plan view of a cabin according to an embodiment of the present invention. [Figure 7] 1 is a left side view showing an antenna unit and its supporting structure according to an embodiment of the present invention. FIG. [Figure 8] 1 is a front view showing an antenna unit and its supporting structure according to an embodiment of the present invention; [Figure 9] 1 is a plan view showing an antenna unit and its supporting structure according to an embodiment of the present invention; [Figure 10] 1 is a partially cutaway exploded left side view showing an antenna unit mounting structure according to an embodiment of the present invention; [Figure 11] FIG. 2 is a bottom perspective view showing an antenna unit and its supporting structure according to an embodiment of the present invention. [Figure 12] FIG. 10 is a rear perspective view showing the support configuration for the lower part of the handrail section according to one embodiment of the present invention. [Figure 13] 1 is an explanatory diagram illustrating a rotation configuration of a cabin according to an embodiment of the present invention. FIG. [Figure 14] 1 is a plan view showing the internal configuration of an antenna unit according to an embodiment of the present invention. [Figure 15] FIG. 2 is a left side view showing the internal configuration of the antenna unit according to the embodiment of the present invention. [Figure 16] 2 is a partially enlarged plan view showing the internal configuration of the antenna unit according to the embodiment of the present invention. FIG. [Figure 17] 1 is a perspective view showing an antenna support base of an antenna unit according to an embodiment of the present invention; [Figure 18] 1 is a diagram showing a circuit configuration of a receiving device in an antenna unit according to an embodiment of the present invention; [Figure 19] FIG. 10 is a left side view showing an antenna unit and its supporting structure according to another embodiment of the present invention. [Figure 20] FIG. 10 is a front view showing an antenna unit and its supporting structure according to another embodiment of the present invention. [Figure 21] FIG. 10 is a front view showing a state in which an antenna unit according to another embodiment of the present invention has been moved. DETAILED DESCRIPTION OF THE INVENTION

[0016] The present invention aims to improve the safety of working on an antenna unit that receives positional information from a satellite and is provided at a height above the cabin that covers the driver's section by providing handrails to the cabin. Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0017] In the following embodiments of the present invention, a combine harvester will be used as an example of a work vehicle according to the present invention. However, the work vehicle according to the present invention may be any vehicle equipped with a cabin that covers the driver's section. Work vehicles to which the present invention can be applied include various types of combine harvesters, such as head-feeding combines and conventional combines, as well as tractors and wheel loaders for civil engineering work.

[0018] The overall configuration of a combine harvester 1 as a work vehicle according to this embodiment will be described using Figures 1 to 3. In the following description, the left and right sides of the combine harvester 1 as viewed from the front will be referred to as the left and right sides of the combine harvester 1, respectively.

[0019] As shown in Figures 1 to 3, the combine harvester 1 includes a traveling section 2 configured as a crawler-type traveling device having a pair of left and right crawler sections 3, 3, and a traveling body 4 supported by the traveling section 2. The combine harvester 1 includes a reaping section 5, a threshing section 6, a grain tank 7, a sorting section 8, a discharge auger 9, and a straw disposal section 10. An engine 11 is mounted on the traveling body 4 as a drive source. The combine harvester 1 also includes a cabin 30 that covers the driver's section 12.

[0020] Each crawler unit 3 constituting the traveling unit 2 has a track frame 3a extending in the front-to-rear direction below the traveling body 4, various rotating bodies such as a drive sprocket 3c supported by the track frame 3a, and a crawler belt 3b wound around these rotating bodies. The crawler unit 3 is driven by power transmitted from the engine 11 via the drive sprocket 3c.

[0021] The reaping unit 5 is a device configuration for harvesting and collecting stalks in the field, and is provided at the front of the traveling body 4. The reaping unit 5 is provided in front of the traveling body 4, spanning substantially the entire width of the combine harvester 1. The reaping unit 5 is attached to the traveling body 4 so as to be rotatable about a predetermined axis via a hydraulic cylinder for lifting and lowering, and is provided so that it can be raised and lowered by the rotational movement caused by the extension and contraction of the hydraulic cylinder.

[0022] The reaping unit 5 has a reaping support frame 5a as a reaping frame, and is configured to support a grass dividing body 5b, a raising device 5c, a cutting blade device 5e, and a stalk transport device 5f. The reaping unit 5 divides stalks in the field using the grass dividing body 5b, raises the divided stalks using the raising device 5c, and transports the raised stalks rearward using the stalk transport device 5f while cutting and reaping them using the cutting blade device 5e. The stalks cut by the reaping unit 5 are transported to the threshing unit 6. Each device of the reaping unit 5 operates by power transmitted from the engine 11.

[0023] The reaping unit 5 is provided so as to be side-openable relative to the traveling body 4. Specifically, the reaping support frame 5a constituting the reaping unit 5 is rotatably supported relative to the traveling body 4 by a rotating support part whose axial direction is aligned in the up-down direction. The rotating support part is provided, for example, on the left side of the traveling body 4. The reaping unit 5 rotates from a normal position facing forward to the left about the rotation axis of the rotating support part, and rotates within an angle range until it faces, for example, to the left side.

[0024] A threshing unit 6 that threshes the stalks cut by the reaping unit 5 and a grain tank 7 that serves as a grain storage unit for storing the grains removed by the threshing unit 6 are arranged side by side on the traveling body 4. The threshing unit 6 is located on the left side of the body, and the grain tank 7 is located on the right side of the body. The combine harvester 1 travels on the traveling unit 2 while reaping the stalks with the reaping unit 5 and threshing with the threshing unit 6.

[0025] The threshing section 6 has a threshing drum 6a and a processing drum (not shown) with a rotation axis extending in the front-to-back direction, and a stalk supplying device (not shown) located to the left of the threshing drum 6a. The stalk supplying device clamps the base of the stalks cut by the reaping section 5 and transports the stalks rearward in a lying position with the ears facing the threshing drum 6a. The stalk supplying device has a feed chain wound around multiple sprockets with a rotation axis extending in the left-to-right direction, and a stalk supply clamping body that cooperates with the feed chain to clamp the base of the stalks.

[0026] Below the threshing unit 6 on the traveling machine body 4, there is provided a sorting unit 8 that sorts the material threshed by the threshing unit 6. The sorting unit 8 has a shaking sorting device 8a, a wind sorting device, and a grain conveying device (not shown). The sorting unit 8 shakes and sorts the material that has fallen from the threshing unit 6 using the shaking sorting device 8a, and then winds and sorts the material after shaking and sorting using the wind sorting device. The sorting unit 8 conveys grains from the material after wind sorting to the right toward the grain tank 7 using the grain conveying device, and blows straw dust, dust, etc. backward using the wind sorting device and discharges them outside the machine body. The grains conveyed by the grain conveying device toward the grain tank 7 are stored in the grain tank 7.

[0027] A discharge auger 9 is provided on the traveling body 4 as a grain discharge device for discharging grains from the grain tank 7 to the outside. The discharge auger 9 is provided so as to be rotatable relative to the traveling body 4 via a vertical take-out conveyor 9b provided on the right rear side of the traveling body 4. The discharge auger 9 is also provided so as to be rotatable up and down around its base.

[0028] The discharge auger 9 is in a stored state when it extends horizontally from the vertical take-out conveyor 9b on the right rear side of the traveling body 4 to the left front. In the stored state, the discharge auger 9 is positioned with its tip on the left side of the reaping unit 5 in a plan view, and extends along the diagonal line of the machine body (see Figure 3). The discharge auger 9 is placed and supported on an auger rest 27, which serves as an auger receiving portion, to enter the stored state.

[0029] The auger rest 27 is provided on the left side of the rear of the cabin 30 and is supported by a predetermined support member. The auger rest 27 has a concave shape with an open upper side so that the cylindrical discharge auger 9 can be stored and supported in a positioned state, and supports a predetermined portion of the discharge auger 9 in the middle in the extension direction from below.

[0030] The grains stored in the grain tank 7 are transported by a discharge auger 9 equipped with a screw conveyor, and are discharged from a discharge outlet 9a provided at the tip of the discharge auger 9. The grains discharged from the discharge outlet 9a are dumped into the bed of a truck, a container, or the like. When discharging grains, the discharge auger 9 rotates from its stored state to the left and right or up and down on the body of the machine, thereby moving the discharge outlet 9a to the outside of the machine.

[0031] On the traveling machine body 4, behind the threshing section 6, there is provided a straw waste processing section 10 that processes the straw after threshing by the threshing section 6. The straw waste processing section 10 has a straw waste conveying device 10a and a straw waste cutting device 10b. The straw waste conveying device 10a transports the threshed stalks (discarded stalks) by the threshing section 6 rearward and discharges them outside the machine body or to the straw waste cutting device 10b. The straw waste cutting device 10b cuts the discarded stalks transported from the straw waste conveying device 10a and discharges them outside the machine body.

[0032] A driver's unit 12 covered by a cabin 30 is provided on the traveling body 4 to the right of the reaping unit 5 and in front of the grain tank 7. In other words, the driver's unit 12 is provided inside the cabin 30 above the front of the traveling body 4. A handle 13 serving as a steering operation unit is provided in front of the driver's unit 12, and a driver's seat 14 is provided behind the handle 13. In addition, various operating tools including a main shift lever 15 are provided on the left side of the driver's seat 14.

[0033] A prime mover unit including an engine 11 is provided below and behind the driving unit 12. The power of the engine 11 is transmitted via a transmission and other devices to various parts of the combine harvester 1, such as the traveling unit 2, reaping unit 5, threshing unit 6, sorting unit 8, discharge auger 9, and straw waste treatment unit 10. The engine 11 is a diesel engine. An engine cover 16 that covers the right side of the engine room is provided on the right side of the engine 11.

[0034] The combine 1 also includes an exhaust gas purification device 17 for purifying exhaust gas from the engine 11. The exhaust gas purification device 17 has a DPF case (diesel particulate filter case) and an SCR (selective catalytic reduction) case, and purifies the exhaust gas by introducing the exhaust gas from the engine 11 into these cases and removing particulate matter such as soot and nitrogen oxides (NOx) contained in the exhaust gas. The exhaust gas purification device 17 is provided above the main body of the engine 11, at a position on the left rear side of the cabin 30.

[0035] The configuration of the cabin 30 will be described with reference to Figures 4 to 6. The cabin 30 has a front portion 31, a rear portion 32, a left side wall portion 33, a right side wall portion 34, a roof portion 35 forming the ceiling portion, and a floor portion 36, and these portions form a generally box-like shape as a whole.

[0036] The front portion 31 of the cabin 30 has a forward-inclined upper front surface 31a that constitutes the majority of the upper half of the front portion 31, and a front lower surface 31b that constitutes approximately the lower half of the front portion 31 and is inclined downward toward the front, and has an overall curved shape that is concave toward the rear in a side view. The front upper surface 31a is formed as a transparent window portion entirely using a rectangular transparent plate made of glass, acrylic resin, polycarbonate resin, or the like. The front lower surface 31b is made of a metal member such as a steel plate.

[0037] The rear surface 32 of the cabin 30 has a rearwardly inclined shape in a side view. That is, the rear surface 32 is provided as a downwardly inclined surface portion from the front to the rear as a whole, from the lower side to the upper side.

[0038] The lower portion of the left side wall 33 of the cabin 30 is a lower side surface portion 41 that is a sheet metal portion configured from steel plate or the like (see FIG. 4). A linear left support pillar 42 that extends vertically is provided in the middle portion of the left side wall 33 in the front-to-rear direction.

[0039] The left support column 42 is provided so as to extend over substantially the entire left side wall 33 in the vertical direction. The left support column 42 is a hollow column having a rectangular shape in a cross-sectional plan view, and has a vertical, flat left side surface 42a. The left support column 42 is provided so that the left side surface 42a protrudes slightly to the left relative to the rest of the left side wall 33.

[0040] A rectangular left rear window 43 is provided on the left side wall 33 above the lower side surface 41 and behind the left support pillar 42. The left rear window 43 is configured by attaching a rectangular transparent plate 45 made of glass or the like to a frame-like portion formed on the upper part of a left side plate 44 that forms the rear part of the left support pillar 42 on the left side wall 33. The lower part of the left side plate 44 forms the lower side surface 41.

[0041] The portion of the left side wall 33 in front of the left rear window 43 forms a left front window 47. The left front window 47 has a generally inverted trapezoidal shape, with its front edge aligned with the forward inclination of the front upper surface 31a of the front surface 31 and its rear edge aligned with the upper part of the left support column 42. The left front window 47 is formed from a rectangular transparent plate made of glass, acrylic resin, polycarbonate resin, or the like, and is provided in approximately the same range as the front upper surface 31a of the front surface 31 in the up-down direction.

[0042] A front upper plate 57 is provided on the left side wall 33 above the left front window 47. The front upper plate 57 forms the upper edge of the portion of the left side wall 33 that is forward of the left support pillar 42. The lower portion of the front upper plate 57 overlaps the upper edge of the left front window 47 from the inside (right side).

[0043] A door 48, which is an opening and closing door for getting in and out, is provided on the right side wall 34 of the cabin 30 (see FIG. 2). The door 48 is rotatably supported on the frame portion of the cabin 30 so as to open outward from the front side. A handle 49 is provided on the front of the door 48.

[0044] The roof portion 35 of the cabin 30 has a generally rectangular outer shape with the longitudinal direction extending in the front-to-rear direction in a plan view. The front edge of the roof portion 35 protrudes forward in a canopy-like manner from the upper end of the front portion 31, and the rear edge protrudes rearward in a canopy-like manner from the upper end of the rear portion 32. A plurality of lighting units 51 are provided side by side on the front end surface of the roof portion 35 (see FIG. 5).

[0045] The roof section 35 has a flat outer shape and is hollow. The roof section 35 has a lower panel (not shown) that forms the base of the roof section 35, and a roof panel 50 provided above the lower panel, with these panels forming a hollow section. The roof panel 50 has an upper surface section 50a and left and right side surface sections 50b that are bent downward on both the left and right sides of the upper surface section 50a. The roof panel 50 is a cover member provided to entirely cover the lower panel section from above and both the left and right sides.

[0046] The left side surface portion 50b of the roof panel 50 covers the upper edge portion of the left wall portion 33 from the left, and the right side surface portion 50b of the roof panel 50 covers the upper edge portion of the right wall portion 34 from the right. The roof portion 35 is provided inside with an indoor unit of an air conditioning system provided in the combine harvester 1.

[0047] The floor 36 of the cabin 30 forms a horizontal floor surface 52 in front of and below the driver's seat 14. A substantially horizontal seat support surface 54 is provided on the rear side of the floor surface 52 via a sloped surface 53 that slopes downward toward the front, and the driver's seat 14 is installed on the seat support surface 54 (see FIG. 4).

[0048] In the cabin 30 having the above-described configuration, the left side surface of the cabin 30 is formed by the left side wall 33 and the left portion of the roof 35. The right side surface of the cabin 30 is formed by the right side wall 34 and the right portion of the roof 35. Hereinafter, the left side surface of the cabin 30 including the left side wall 33 and the left portion of the roof 35 will be referred to as the cabin left side surface 37.

[0049] The combine harvester 1 according to this embodiment includes an antenna unit 60 for receiving positional information from a satellite. The antenna unit 60 is provided on the upper part of the cabin left side surface 37, one of the left and right side surfaces of the cabin 30. The antenna unit 60 is provided in a state supported by the cabin 30 via a predetermined support member so as to be located near the left side of the upper part of the cabin left side surface 37.

[0050] The antenna unit 60 has a box-like shape that is generally rectangular in plan view, and is oriented with its longitudinal direction as the front-to-rear direction. The antenna unit 60 is provided at approximately the same height as the roof portion 35 in the vertical direction. Specifically, the vertical dimension of the antenna unit 60 is approximately the same as the vertical dimension of the side portion 50b of the roof panel 50, and the antenna unit 60 is provided so that approximately the entire vertical dimension is located within the height range of the side portion 50b of the roof panel 50.

[0051] The antenna unit 60 is located forward of the left support pillar 42 provided on the cabin left side surface 37 in the front-rear direction. Specifically, the rear end of the antenna unit 60 is located near the left support pillar 42 in the front-rear direction, and is provided along the upper edge of the left front window 47 in a left side view. The antenna unit 60 has approximately the same length in the front-rear direction as the upper edge of the left front window 47. The antenna unit 60 has a dimension in the front-rear direction that is approximately one-third of the overall length of the roof 35, and is provided so as to be located on the left front side of the roof 35 (see FIG. 6).

[0052] The antenna unit 60 is provided so that its right side surface is located immediately to the left of the left side surface 50b of the roof panel 50. In this way, the antenna unit 60 is disposed adjacent to the left of the front part of the roof portion 35 with respect to the cabin 30.

[0053] According to this arrangement of the antenna unit 60, in a configuration in which the cabin 30 is provided at the front right portion of the combine harvester 1 body, the antenna unit 60 is located at approximately the center of the body in the left-right direction (see FIG. 3). In addition, because the antenna unit 60 is located at the front left of the roof portion 35, the light distribution by the lighting unit 51 and the field of view from inside the cabin 30 are not obstructed by the antenna unit 60.

[0054] Furthermore, a space is formed on the left side of the cabin 30 between the discharge auger 9 in the stowed state, and the antenna unit 60 is disposed in this space. The discharge auger 9 rotates from the stowed state to the left or upward of the vehicle body. Therefore, the antenna unit 60 does not interfere with the discharge auger 9.

[0055] The antenna unit 60 is configured as a positioning unit that receives radio waves from positioning satellites and measures the position of the combine harvester 1. The antenna unit 60 includes a receiving device 61 as a receiving section, an inertial navigation system 62 as a computing section, a wireless communication device 63 as a communication section, and a case 64 that houses these devices. The antenna unit 60 configures an automatic steering system for the combine harvester 1.

[0056] The receiving device 61 receives radio waves from positioning satellites, converts the received radio waves into signals, and transmits them to the inertial navigation system 62. The receiving device 61 is, for example, a GNSS receiver (GNSS antenna) that receives radio waves from a group of GNSS satellites, or a GPS receiver (GPS antenna) that receives radio waves from GPS (Global Positioning System) satellites.

[0057] The inertial navigation system 62 measures acceleration in three directions using a three-axis gyro and calculates attitude and orientation data. The inertial navigation system 62 also calculates position data based on signals transmitted from the receiving device 61. The inertial navigation system 62 functions as a calculation device that calculates position data based on position information from the receiving device 61. For example, by incorporating a GNSS receiver in the inertial navigation system 62, the reliability of the attitude and orientation data calculated by the inertial navigation system 62 is improved.

[0058] By including an inertial navigation system 62, the antenna unit 60 can utilize inertial navigation, which calculates and determines positioning by calculating moving speed, moving distance, etc. based on the acceleration in three directions detected by the inertial navigation system 62, even in situations where radio waves from positioning satellites cannot be received due to bad weather, radio interference, etc.

[0059] The wireless communication device 63 transmits the position data and attitude direction data calculated by the inertial navigation system 62 to an external device via wireless communication. The wireless communication device 63 is, for example, a data communication device using a wireless LAN (Local Area Network) or mobile communication. The data transmitted from the wireless communication device 63 is received by, for example, a mobile terminal carried by the operator or an ECU (Electronic Control Unit) of the combine harvester 1, and is used to confirm the position in the field and the attitude of the combine harvester 1 (tilts in the forward, backward, left, and right directions, etc.).

[0060] The case 64 has a lower case body 65 that forms the lower part of the case 64 and an upper case body 66 that forms the upper part of the case 64, and these case bodies form an accommodation space and also form the outer shape of the antenna unit 60. The case 64 has a relatively flat box-like outer shape with the longitudinal direction being the front-to-rear direction, due to the lower case body 65 and the upper case body 66. The lower case body 65 and the upper case body 66 are members made of, for example, resin.

[0061] The lower case body 65 is a box-shaped member with an open top, and has a horizontal bottom surface 65a and a peripheral wall portion 65b including front, rear, left, and right side surfaces and forming a rectangular opening with its upper edge. The upper case body 66 is a lid-like portion that covers the opening of the lower case body 65 from above. The front, rear, left, and right side surfaces of the upper case body 66 form rectangular edges, and this edge is fitted into the rectangular opening of the lower case body 65. The upper case body 66 is fitted into the lower case body 65 with the lower opening edge overlapping the upper opening edge of the lower case body 65 from the outside, and both case bodies are fixed to each other at multiple points with fasteners 67 such as bolts that pass through their fitted portions.

[0062] Inside the case 64, from front to rear, the wireless communication device 63, the receiving device 61, and the inertial navigation system 62 are arranged in this order at predetermined intervals. These devices are fixed to a device mounting plate 68 (see FIG. 16) provided on the upper side of the bottom surface 65a of the lower case body 65 inside the case 64 by fasteners such as bolts.

[0063] As described above, the antenna unit 60 is configured as an integrated unit that houses the receiving device 61, the inertial navigation system 62, and the wireless communication device 63 inside the case 64. This allows the antenna unit 60 to be easily attached to the aircraft and highly versatile for use with multiple models.

[0064] Furthermore, with regard to the arrangement of the antenna unit 60, by positioning the antenna unit 60 in the center of the left and right of the machine body, errors when acquiring position information and attitude direction information of the combine harvester 1 can be reduced, and good positioning accuracy can be obtained. Furthermore, since the antenna unit 60 is provided at approximately the same height as the roof portion 35 of the cabin 30, which is at a high position on the combine harvester 1, good positioning accuracy can be obtained.

[0065] The positioning data (position data and attitude direction data) acquired by the antenna unit 60 is used to control the autonomous combine harvester 1, which performs work while autonomously traveling along a predetermined route. The position data is used, for example, to determine whether the combine harvester 1 is traveling along a predetermined route. The attitude direction data is used, for example, to recognize the inclination of the combine harvester 1 and to check the traveling status of the combine harvester 1 and the state of the field. The operator can also send real-time instructions to the combine harvester 1 by receiving transmission data from the wireless communication device 63.

[0066] The configuration of the antenna unit 60 is not limited to this embodiment. For example, the configuration of the antenna unit 60 may be such that the inertial navigation system 62 is omitted by providing the receiving device 61 with a function as a calculation unit that calculates position data from the position information received by the receiving device 61.

[0067] The support structure of the antenna unit 60 will be described with reference to Fig. 4 to Fig. 13. Note that Fig. 7, Fig. 8 and Fig. 10 show the roof panel 50 in a partially cutaway state. Fig. 10 also shows a partial cross section.

[0068] The combine harvester 1 includes a support frame 70 as a support member for supporting the antenna unit 60. The support frame 70 is a frame portion formed of a round pipe-shaped member having a predetermined bent or curved shape, and is provided on the left side surface portion 37 of the cabin.

[0069] The support frame 70 is configured to extend in the front-to-rear direction. Most of the support frame 70, excluding both front and rear ends, is a frame main body that extends approximately in the front-to-rear direction. The support frame 70 has, from the front to the rear, a front fixing portion 71, a front-to-rear extending portion 72, an inclined portion 73, and a rear fixing portion 74 as a portion that forms a curved shape using a pipe-shaped member.

[0070] The front fixing portion 71 is a portion whose axial direction is the left-right direction and extends leftward from the cabin left side portion 37. The right end of the front fixing portion 71 is the front end of the support frame 70.

[0071] The front-rear extending portion 72 is a portion whose axial direction is the front-rear direction, and extends horizontally rearward from the left end of the front fixing portion 71 so as to form a right-angled corner together with the front fixing portion 71. The corner between the front-rear extending portion 72 and the front fixing portion 71 is curved.

[0072] The inclined portion 73 is a portion whose axial direction is an inclination direction that rises rearward in a side view and gradually inclines from the left and right outer side (left side) to the right and left inner side (right side) from the front to the rear in a plan view. The inclined portion 73 is a portion that extends from the rear end of the front-rear extending portion 72 diagonally toward the upper rear right so as to form an obtuse angle together with the front-rear extending portion 72 in a side view and a plan view.

[0073] In a side view, the angle formed between the inclined portion 73 and the front-rear extending portion 72 is, for example, about 170°. In a plan view, the angle formed between the inclined portion 73 and the front-rear extending portion 72 is, for example, about 170°.

[0074] The rear fixed portion 74 is a portion whose axial direction is the left-right direction, and extends horizontally to the right from the rear end of the inclined portion 73 so as to form an obtuse corner together with the inclined portion 73. In a plan view, the angle formed between the inclined portion 73 and the rear fixed portion 74 is, for example, about 100°. The corner between the inclined portion 73 and the rear fixed portion 74 is curved. The right end of the rear fixed portion 74 is the rear end of the support frame 70.

[0075] In the support frame 70, a frame main body portion extending substantially in the front-rear direction is formed by the front-rear extending portion 72 and the inclined portion 73. In a left side view, the support frame 70 is located near the lower edge of the left side surface portion 50b of the roof panel 50, and is provided so as to fit along the left side surface portion 50b of the roof panel 50.

[0076] The support frame 70 is provided with its front end and rear end fixed to the cabin left side surface 37. That is, the support frame 70 is provided with the right end of the front fixing portion 71, which forms the front end, and the right end of the rear fixing portion 74, which forms the rear end, both fixed to the cabin left side surface 37.

[0077] The front end of the support frame 70 is located in the cabin left side section 37 near the upper end of the front upper surface section 31a that constitutes the front surface section 31. The front end of the support frame 70 is fixed to the front upper side plate 57 that constitutes the front upper section of the cabin left side section 37 via a front mounting plate 76.

[0078] The front mounting plate 76 is a plate-like member having a generally rectangular outer shape, and is fixed to the front upper plate 57 with its thickness direction aligned with the left-right direction and its longitudinal direction aligned with the up-down direction. The front mounting plate 76 is fixed to a mounting seat 77 fixed to the front upper plate 57 with a fixing bolt 78. In other words, the front mounting plate 76 is fixed to the front upper plate 57 via the mounting seat 77.

[0079] The mounting seat 77 is a metal fitting having an upper surface, a lower surface, and a left side surface that are parallel to each other, and is generally U-shaped with the right side (the front upper plate 57 side) open when viewed from the front (see FIG. 8), and is fixed to the front upper plate 57 by welding or the like. The mounting seat 77 has approximately the same dimensions as the front mounting plate 76 in the front-to-rear direction. The left side surface of the mounting seat 77 is the surface that receives the attachment of the front mounting plate 76.

[0080] The front mounting plate 76 is fixed to the mounting seat 77 at two locations, one at the front and one at the rear, by fixing bolts 78. The fixing bolts 78 pass through the left side surface of the front mounting plate 76 and the mounting seat 77 and are threaded into nuts 79 provided on the back side (right side) of the left side surface. The fixing portions provided by the fixing bolts 78 are located near the front and rear corners of the upper part of the front mounting plate 76. The upper part of the front mounting plate 76 is fixed to the mounting seat 77 by the fixing bolts 78, and the lower part extends downward from the mounting seat 77.

[0081] The lower part of the front mounting plate 76 is located near the outer lateral side (left side) of the upper front corner of the left front window 47. The right end part of the front fixing part 71 of the support frame 70 is fixed to the lower part of the front mounting plate 76. The right end part of the front fixing part 71 is fitted into a circular opening 76a formed in the lower part of the front mounting plate 76 and is fixed to the front mounting plate 76 by welding or the like.

[0082] A reinforcing plate 80 is provided between the front mounting plate 76 and the support frame 70. The reinforcing plate 80 is a plate-shaped member having approximately the same dimensions as the front mounting plate 76 in the up-down direction, and is provided on the rear side of the front fixed part 71 with its plate thickness direction oriented in the front-to-rear direction.

[0083] The reinforcing plate 80 is provided at a position intermediate the front mounting plate 76 in the fore-and-aft direction so as to protrude perpendicularly to the left from the front mounting plate 76. The reinforcing plate 80 is fixed to the front mounting plate 76 by welding or the like, and is also fixed to the right end of the front fixing part 71 by welding or the like. The reinforcing plate 80 has a bulging shape in which the portion fixed to the front fixing part 71 is longer in the left-right direction than the other portions.

[0084] The front fixing portion 71 of the support frame 70 is fixed to the front mounting plate 76 at a portion extending downward from the left side surface portion 50b of the roof panel 50. The portion of the front mounting plate 76 fixed to the front upper side plate 57 by the fixing bolts 78 is covered from the left by the left side surface portion 50b of the roof panel 50. Therefore, the portion of the front mounting plate 76 fixed to the front upper side plate 57 is hidden by the left side surface portion 50b of the roof panel 50 in a left side view.

[0085] The rear end of the support frame 70 is located above the rear of the left rear window 43 on the cabin left side surface 37. The rear end of the support frame 70 is fixed via a rear mounting plate 81 to the upper end of the left side plate 44 that forms the rear of the cabin left side surface 37.

[0086] The rear mounting plate 81 is a plate-like member having an outer shape of a roughly truncated isosceles triangle, and is fixed to the left side plate 44 with its plate thickness direction facing left and right and its top side facing downward. The rear mounting plate 81 is fixed to the left side plate 44 with a fixing bolt 82.

[0087] The rear mounting plate 81 is fixed to the left side plate 44 at two locations, one at the front and one at the back, by fixing bolts 82. The fixing bolts 82 pass through the left side plate 44 and are threaded into female threads (not shown) provided on the back side (right side) of the left side plate 44. The fixing portions provided by the fixing bolts 82 are located near the front and rear corners of the upper part of the rear mounting plate 81.

[0088] The right end of the rear fixing portion 74 of the support frame 70 is fixed to the lower portion of the rear mounting plate 81. The right end of the rear fixing portion 74 is fitted into a circular opening 81a formed in the lower portion of the rear mounting plate 81, and is fixed to the rear mounting plate 81 by welding or the like.

[0089] The rear fixing portion 74 of the support frame 70 is fixed to the rear mounting plate 81 at a portion extending downward from the left side surface portion 50b of the roof panel 50. The upper portion of the portion of the rear mounting plate 81 fixed to the left side panel 44 by the fixing bolt 82 is covered from the left by the left side surface portion 50b of the roof panel 50. Therefore, the upper portion of the portion of the rear mounting plate 81 fixed to the left side panel 44 is hidden by the left side surface portion 50b of the roof panel 50 in a left side view.

[0090] As described above, the antenna unit 60 is supported on the front portion of the support frame 70, which is fixedly supported on the cabin 30. The antenna unit 60 is supported in a fixed state by support brackets 90 provided at two locations, front and rear, on the front-rear extension portion 72 of the support frame 70. The front support bracket 90 is provided on the support frame 70 near a corner formed by the front fixed portion 71 and the front-rear extension portion 72, and the rear support bracket 90 is provided in the middle portion between the front and rear of the front-rear extension portion 72.

[0091] The support bracket 90 is fixed to a mounting bracket 91 that is fixed to the support frame 70. In other words, the support bracket 90 is provided to the support frame 70 via the mounting bracket 91. The support bracket 90 and the mounting bracket 91 are configured to be symmetrical or approximately symmetrical about the axis of the front-rear extension 72 of the support frame 70. Furthermore, the front and rear sets of support brackets 90 and mounting brackets 91 are configured to be symmetrical or approximately symmetrical in the front-rear direction.

[0092] The mounting bracket 91 is a longitudinal member formed by bending a plate-like member, and is provided above the front-rear extension portion 72 so that its longitudinal direction is the left-right direction and is perpendicular to the axial direction of the front-rear extension portion 72 in a plan view. The mounting bracket 91 has a front surface portion 91a, a rear surface portion 91b, and an upper surface portion 91c that are parallel to each other, and these surfaces form a roughly "U" shape with the lower side open in a side view.

[0093] Semicircular cutouts 91d for fitting the front-rear extensions 72 are formed on the lower left-right central portions of the front surface 91a and rear surface 91b of the mounting bracket 91. The mounting bracket 91 is fixed to the front-rear extensions 72 by welding or the like, with the front-rear extensions 72 fitted into the cutouts 91d in the front surface 91a and rear surface 91b. The mounting bracket 91 has a longitudinal dimension that is shorter than the widthwise (left-right) dimension of the case 64 of the antenna unit 60, but longer than half that dimension.

[0094] The support bracket 90 is a longitudinal member formed by bending a plate-like member, and is provided above the front-rear extending portion 72 so that its longitudinal direction is the left-right direction and is perpendicular to the axial direction of the front-rear extending portion 72 in a plan view. The support bracket 90 has approximately the same length as the mounting bracket 91.

[0095] The support bracket 90 has a fixed surface portion 90a with its thickness direction aligned in the front-to-rear direction, a horizontal support surface portion 90b formed by bending at a right angle from the upper end of the fixed surface portion 90a, and left and right side surface portions 90c formed by bending at a right angle from both left and right ends of the fixed surface portion 90a. In the support bracket 90, the support surface portion 90b is the surface portion that receives the attachment of the case 64 of the antenna unit 60. The support surface portion 90b is located at approximately the same height as the upper surface portion 91c of the attachment bracket 91.

[0096] The front support bracket 90 is positioned in front of the mounting bracket 91 with the fixed surface portion 90a facing rearward, and is fixed to the mounting bracket 91 at two locations on both the left and right ends with fixing bolts 92, with the fixed surface portion 90a overlapping the front surface portion 91a of the mounting bracket 91. The fixing bolt 92 passes through the fixed surface portion 90a and the front surface portion 91a, and is threaded into a nut portion 93 provided on the rear side of the front surface portion 91a of the mounting bracket 91.

[0097] The rear support bracket 90 is positioned on the rear side of the mounting bracket 91 with the fixed surface 90a facing forward, and is fixed to the mounting bracket 91 at two locations on both the left and right ends with fixing bolts 94, with the fixed surface 90a overlapping the rear surface 91b of the mounting bracket 91. The fixing bolt 94 passes through the fixed surface 90a and the rear surface 91b, and is threaded into a nut 95 provided on the front side of the rear surface 91b of the mounting bracket 91.

[0098] A semicircular cutout 90d for fitting the front-rear extension 72 is formed below the left-right central portion of the fixing surface 90a of the support bracket 90. The support bracket 90 has an inverted V-shaped recess with the cutout 90d located in the center at the lower left-right central portion. By fitting the front-rear extension 72 into the cutout 90d, the lower edge portions on both the left and right sides are positioned below the front-rear extension 72.

[0099] The case 64 of the antenna unit 60 is fixed to the support surface portions 90b of the front and rear support brackets 90 by fixing bolts 96. Fixing portions using the fixing bolts 96 are provided at two locations on both the left and right sides of each support bracket 90. For this reason, holes 90e for passing the fixing bolts 96 are formed in two locations on both the left and right sides of the support surface portion 90b of the support bracket 90 (see FIG. 9). In this way, the antenna unit 60 is fixed to the front and rear support brackets 90 by the fixing bolts 96 at a total of four locations, two locations on each side.

[0100] In the antenna unit 60, a female threaded portion 97 into which a fixing bolt 96 is screwed is provided inside the case 64. The female threaded portion 97 is configured from a tubular member having a threaded hole, and is fixed to the case 64 so that the threaded hole faces the bottom surface 65a of the lower case body 65 of the case 64. The female threaded portions 97 are provided in four locations corresponding to the fixing portions by the fixing bolts 96. In this configuration, the fixing bolts 96 pass through the support surface portion 90b of the support bracket 90 from below and are screwed into the female threaded portions 97, thereby fixing the case 64 to the support bracket 90.

[0101] The antenna unit 60 is provided in a state in which it is supported above approximately the front half of the support frame 70. Specifically, the antenna unit 60 is provided at a position relative to the support frame 70 such that, in a plan view, the left-right center of the outer shape of the case 64 coincides or approximately coincides with the axial position of the front-rear extension portion 72. In addition, in the front-rear direction, the front end of the case 64 of the antenna unit 60 is located forward of the front fixing portion 71, and the rear end of the case 64 is located forward of the bent portion formed by the front-rear extension portion 72 and the inclined portion 73.

[0102] As described above, the antenna unit 60 is supported by the support frame 70 at the upper left side of the cabin 30, and a handrail section 100 is provided. That is, the combine harvester 1 is equipped with the handrail section 100 used to perform work on the antenna unit 60. The handrail section 100 is made up of a round pipe-shaped member having a predetermined bent or curved shape, and is provided on the left side surface section 37 of the cabin 30.

[0103] The handrail section 100 is configured to extend vertically. Most of the handrail section 100, excluding both the upper and lower ends, is a handrail main body that extends vertically in side view. The handrail section 100 has, from bottom to top, a lower fixed section 101, an inclined extension section 102, and an upper fixed section 103 as a curved section made of a pipe-shaped member.

[0104] The lower fixed part 101 is a part whose axial direction is the left-right direction and extends leftward from the cabin left side part 37. The right end part of the lower fixed part 101 is the lower end part of the handrail part 100.

[0105] The inclined extending portion 102 is a portion whose axial direction is a direction along the vertical direction in a side view, and a direction gradually inclined from the inside (right side) to the outside (left side) from the bottom to the top in a front view. The inclined extending portion 102 is a portion that extends diagonally upward to the left so as to form an obtuse angle together with the lower fixing portion 101 in a front view. When viewed from the front, the axial direction of the inclined extending portion 102 is In the vertical direction The angle formed is, for example, about 5 to 10 degrees. The corner between the inclined extending portion 102 and the lower fixed portion 101 forms a curved portion 104.

[0106] The upper fixing portion 103 is a portion whose axial direction is the up-down direction, and extends upward from the upper end of the inclined extending portion 102 so as to form an obtuse angle together with the inclined extending portion 102. The upper end of the upper fixing portion 103 becomes the upper end of the handrail portion 100.

[0107] In the handrail section 100, the inclined extension section 102 and the upper fixed section 103 form a handrail main body section that extends in the vertical direction in a side view. The inclined extension section 102, which forms the majority of the handrail main body section, is the part of the handrail section 100 that is primarily gripped by the worker. In a left side view, the handrail section 100 is provided so as to overlap the upper part of the left support column 42 that constitutes the cabin left side section 37. The handrail section 100 is provided across more than half of the cabin left side section 37 in the vertical direction. Specifically, the upper end of the handrail section 100 is located at approximately the same height as the upper end of the front upper surface section 31a of the cabin 30, and the lower end is located at a height lower than the lower end of the front upper surface section 31a.

[0108] The handrail section 100 is provided with its upper end connected to the support frame 70 and its lower end fixed to the cabin left side surface 37. That is, the handrail section 100 is provided with the upper end of the upper fixed section 103, which is the upper end, connected to and supported by the support frame 70, and the right end of the lower fixed section 101, which is the lower end, fixed to the cabin left side surface 37.

[0109] The upper end of the handrail section 100 is connected to the support frame 70 via an upper support bracket 110, which is an upper connecting member fixed to the support frame 70. The upper support bracket 110 is provided on the lower side of the support frame 70, in the portion of the support frame 70 between the rear support bracket 90 and the corner formed by the front-rear extension section 72 and the inclined section 73.

[0110] The upper support bracket 110 is a member formed by bending a plate-like member into a predetermined shape. The upper support bracket 110 has a substantially rectangular fixing surface portion 110a with the left-right direction being the plate thickness direction, and front and rear side surfaces 110b bent at right angles from the front and rear ends of the fixing surface portion 110a toward the inside of the left and right (right side), forming a substantially "U" shape with the right side open when viewed from above. In the upper support bracket 110, the fixing surface portion 110a is the surface to which the upper end of the handrail portion 100 is attached.

[0111] A concave cutout 110c is formed on the left side of the upper portion of the front and rear side surfaces 110b of the upper support bracket 110, into which the front and rear extensions 72 of the support frame 70 are fitted. The upper support bracket 110 is fixed to the front and rear extensions 72 by welding or the like, with the front and rear extensions 72 positioned within the cutouts 110c of the front and rear side surfaces 110b. The upper edge of the fixing surface 110a of the upper support bracket 110 is positioned to the left of the front and rear extensions 72.

[0112] The handrail section 100 has the upper end of the upper fixed section 103 fixed to the upper support bracket 110 via a fixing plate 115. The fixing plate 115 is a plate-like member having an outline shape of a roughly truncated isosceles triangle, with the thickness direction of the plate facing left and right and the top side facing downward. The fixing plate 115 is fixed to the left side of the upper end of the upper fixed section 103 by welding or the like.

[0113] The fixing plate 115 overlaps the fixing surface portion 110a of the upper support bracket 110 from the back side (right side), and is fixed to the fixing surface portion 110a at two locations, front and rear, by fixing bolts 116. The fixing bolts 116 pass through the fixing surface portion 110a and the fixing plate 115, and are threaded into nuts 117 provided on the back side (right side) of the fixing plate 115. The fixing portions provided by the fixing bolts 116 are located near the front and rear corners of the upper part of the fixing plate 115.

[0114] The handrail portion 100, and the upper support bracket 110 and the fixing plate 115 for connecting the upper end of the handrail portion 100 to the support frame 70 are arranged along the vertical direction when viewed from the left side. Handrail section 1 0 The handrail portion 100 is configured to be symmetrical or approximately symmetrical about the axis of the arrow O. In addition, when viewed from the left side, the entire handrail portion 100 is positioned within the width (front-rear dimension) of the left support pillar 42 that constitutes the cabin left side portion 37.

[0115] The lower end of the handrail section 100 is fixed to the left support column 42 that constitutes the cabin left side section 37 via a lower support bracket 120, which is an attachment member. As shown in Figure 12, the lower support bracket 120 is an attachment fitting that has a bent shape that is roughly like the letter "L". The lower support bracket 120 has a fixing surface section 121 and a support surface section 122 as surfaces that have a bent shape.

[0116] The lower support bracket 120 is fixed to the left support column 42 at two locations, top and bottom, with fixing bolts 124, with the fixing surface 121 aligned along the left side surface 42a of the left support column 42, with the vertical direction as the longitudinal direction. The fixing bolt 124 passes through the fixing surface 121 and the left surface portion of the left support column 42 that forms the left side surface 42a, and is threaded into a nut (not shown) provided on the back side of this left surface portion. The support surface 122 protrudes leftward from the front side of the fixing surface 121, and the front-to-rear direction is the plate thickness direction.

[0117] A through-hole opening 123 is formed in the center of the lower support bracket 120 in the vertical direction. The opening 123 is formed by cutting out the corner formed by the fixing surface portion 121 and the support surface portion 122. The opening 123 has a circular portion formed in a position relative to the fixing surface portion 121 that corresponds to the outer shape of the lower fixing portion 101 when viewed from the left side, which is viewed in the axial direction of the lower fixing portion 101 of the handrail portion 100. Fixing portions are provided on both the top and bottom of the opening 123 in the fixing surface portion 121 using fixing bolts 124.

[0118] With respect to the lower support bracket 120 described above, the handrail section 100 is fixed to the lower support bracket 120 by welding or the like, with the tip of the lower fixing section 101 fitted into the opening 123 in the fixing surface section 121, and with part of the lower fixing section 101 and the curved section 104 positioned on the rear surface 122a side of the support surface section 122. The welded portions of the handrail section 100 to the lower support bracket 120 are, for example, the fitting portion of the lower fixing section 101 with the opening 123 and the contact portions of the lower fixing section 101 and the curved section 104 with the rear surface 122a of the support surface section 122.

[0119] As described above, the handrail section 100 is connected and supported at its upper end to the support frame 70 and at its lower end to the cabin left side section 37, and is installed in a spanning state between the support frame 70 and the cabin left side section 37.

[0120] In the configuration in which the handrail section 100 is provided on the support frame 70 of the antenna unit 60 as described above, the antenna unit 60 and the handrail section 100 are arranged so as to be positioned in front of and behind each other in a plan view.

[0121] 6, in this embodiment, the handrail section 100 is located behind the antenna unit 60 in the front-to-rear direction, and the antenna unit 60 and the handrail section 100 are arranged side by side in the front-to-rear direction. Specifically, the handrail section 100, which extends in the left-to-right direction in a plan view, is located near the rear of the rear end of the case 64 relative to the antenna unit 60.

[0122] In this embodiment, the handrail section 100 is located behind the antenna unit 60 in the front-to-rear direction, but an arrangement in which they are located behind each other in a plan view is not limited to this embodiment. For example, the handrail section 100 located below the antenna unit 60 may be arranged so that a portion (the front portion) overlaps the rear end of the antenna unit 60 in a plan view.

[0123] The handrail section 100 is made of metal parts. Specifically, the handrail section 100 is made of a steel pipe with a circular cross section. The upper end of the handrail section 100 is positioned at a height lower than the antenna unit 60.

[0124] As shown in Figure 7, the upper end of the handrail portion 100 is located lower than the upper end of the fixing plate 115. The upper end of the fixing plate 115 is located lower than the upper end of the fixing surface portion 110a of the upper support bracket 110. The upper support bracket 110 is located lower than the upper end of the front-to-rear extension portion 72 of the support frame 70. The antenna unit 60 is provided above the front-to-rear extension portion 72 via the support bracket 90, with the bottom surface portion 65a of the case 64 supported by the support bracket 90 provided on the upper side of the front-to-rear extension portion 72.

[0125] In this way, the upper end of the handrail section 100 is located below the bottom surface 65a, which is the lower surface of the antenna unit 60. The upper end of the handrail section 100 is the horizontal open end surface of the steel pipe that constitutes the handrail section 100.

[0126] As shown in Fig. 13, the cabin 30 is rotatable about an opening / closing axis A1, which is an axis in the vertical direction relative to the traveling body 4, so as to open outward in the left-right direction of the body of the combine harvester 1. In the example shown in Fig. 13, the opening / closing axis A1 is provided at a position toward the left of the rear of the cabin 30 in a plan view.

[0127] As shown in Fig. 13, the cabin 30 is provided so as to be rotatable from a stored state facing forward to the right within an angle range of approximately 90° about the opening / closing axis A1 (see arrow B1). The state in which the cabin 30 is rotated approximately 90° to the right from the stored state is referred to as the open state. In Fig. 13, the cabin 30 in the open state is indicated by a two-dot chain line.

[0128] The rotation support portion of the cabin 30 around the opening / closing axis A1 is configured to include, for example, a support column provided on the traveling body 4 and a cylindrical pivot support portion provided on the cabin 30 side and rotatably connected to the support column. The cabin 30 is fixed to the traveling body 4 side by a locking mechanism (not shown) in both the stored state and the open state. When the cabin 30 is in the open state, it becomes easier to inspect and repair the engine 11 located below the cabin 30 and the devices in the vicinity.

[0129] When the cabin 30 is opened, the grain tank 7 is rotated outward from its normal storage position around the axis of the vertical take-out conveyor 9b (see Figure 1) of the discharge auger 9 so that the front side opens outward from the machine body (side-open state). This ensures space for the open cabin 30 and prevents the cabin 30 from interfering with the grain tank 7. By rotating the grain tank 7 and opening it outward (to the right), the right side of the threshing section 6 and the installation space for the engine 11 are opened. The grain tank 7 is provided with a locking device (not shown) for fixing the grain tank 7 in the storage position.

[0130] In this way, with the cabin 30 arranged to rotate outward in the width direction (left-right direction) of the aircraft body, the cabin left side surface 37 on which the antenna unit 60, support frame 70, and handrail section 100 are installed is the side surface located on the inside in the left-right direction of the aircraft body, out of the left and right side surfaces of the cabin 30. In other words, the antenna unit 60, support frame 70, and handrail section 100 are provided on the cabin left side surface 37, which is the side surface of the left and right side surfaces of the cabin 30 opposite the side on which the cabin 30 opens.

[0131] Therefore, when the cabin 30 rotates to the right about the opening / closing axis A1 and assumes an open state (see arrow B1 in FIG. 13), the cabin left side portion 37 faces substantially forward or forward. In other words, the antenna unit 60, the support frame 70, and the handrail portion 100 are positioned in front of the cabin 30 that has rotated to the right, and the cabin is in an open state on the right side of the aircraft body.

[0132] The combine harvester 1 also includes an auxiliary antenna 130 (see FIG. 7) as an antenna for acquiring auxiliary information for the antenna unit 60. The auxiliary antenna 130 is an antenna for acquiring GPS correction information in the automatic steering system of the combine harvester 1 using the antenna unit 60. The auxiliary antenna 130 is a straight rod-shaped member.

[0133] The auxiliary antenna 130 receives GPS correction information via a communication means such as an internet line from an independently provided antenna, a communication carrier base station of a communication carrier, or a fixed base station installed by a local government, etc. The antenna unit 60 corrects the position information from the positioning satellite received by the receiving device 61 using the correction information received by the auxiliary antenna 130, using an inertial navigation system 62, etc., and outputs (transmits) the position information of the device using a wireless communication device 63, etc.

[0134] The auxiliary antenna 130 is provided at the connection portion of the handrail section 100 to the support frame 70. Specifically, an antenna support surface portion 110d is provided as a portion that supports the auxiliary antenna 130 on the upper support bracket 110, which serves as a connecting member that constitutes the connection portion of the handrail section 100 to the support frame 70.

[0135] The antenna support surface 110d is a horizontal plate-like portion formed by bending at a right angle from the upper end of the fixing surface 110a to the left on the upper support bracket 110. A notched support recess 110e is formed in the center between the front and rear of the left end of the antenna support surface 110d. The support recess 110e is a recessed portion with an open left side, and is formed to penetrate through the antenna support surface 110d in the plate thickness direction.

[0136] The antenna support surface 110d serves as a mounting seat for the auxiliary antenna 130, and the auxiliary antenna 130 is supported in an upright position relative to the support recess 110e. As a structure for fixing the auxiliary antenna 130 to the antenna support surface 110d, for example, as shown in Fig. 7, an enlarged flange 131 is formed at the lower end of the auxiliary antenna 130, and a male thread is formed on the lower part of the flange 131, and the antenna support surface 110d is clamped and fixed from above and below by a nut 132 threaded onto the flange 131 and the male thread. The height of the auxiliary antenna 130 is, for example, such that the tip (upper end) of the auxiliary antenna 130 is located at the middle between the top and bottom of the case 64.

[0137] In this way, the auxiliary antenna 130 is attached to the upper support bracket 110, and is provided directly above the handrail portion 100. There are no particular limitations on the shape of the auxiliary antenna 130 or the configuration for fixing the auxiliary antenna 130 to the antenna support surface portion 110d. Furthermore, the antenna supported by the upper support bracket 110 is not limited to the auxiliary antenna 130, and there are no limitations on its function, shape, etc. as long as it is an antenna for obtaining information about the antenna unit 60.

[0138] According to the combine harvester 1 of this embodiment having the above-mentioned configuration, the antenna unit 60 is installed at a height position above the cabin 30, thereby improving the safety of working with the antenna unit 60.

[0139] The combine harvester 1 is provided with a handrail 100 on the left side surface 37 of the cabin. With this configuration, when an operator is standing on a platform or stepladder to perform maintenance or remove or adjust the height of the antenna unit 60, which is located high above the ground, the operator can hold onto the handrail 100 to stabilize his or her body. This improves work safety. When working on the antenna unit 60, the side of the reaping unit 5 is opened to open up the space on the left front side of the cabin 30, which can be used as a space to set up a platform or stepladder or as a workspace for the operator.

[0140] Furthermore, with regard to the shape of the handrail section 100, the inclined extension section 102, which constitutes the majority of the handrail section 100, has a shape that is inclined from the top to the bottom in a direction approaching the cabin left side section 37. With this configuration, compared to a configuration in which the handrail section 100 extends the handrail main body section vertically overall, it is possible to obtain good gripping ability, and to prevent the handrail section 100 from contacting the rear section of the reaping section 5, thereby making the machine more compact.

[0141] Furthermore, in the combine harvester 1, the antenna unit 60 and the handrail section 100 are arranged side by side in the front-to-rear direction. With this configuration, the arrangement spaces for the antenna unit 60 and the handrail section 100 are separated into front and rear, respectively, so that the handrail section 100 can be easily gripped. This improves the usability of the handrail section 100 and effectively improves the safety of working on the antenna unit 60 while standing on a platform, stepladder, or the like.

[0142] In this embodiment, the handrail section 100 is provided on the rear side of the antenna unit 60, but the front-to-rear relationship may be reversed. In other words, the handrail section 100 may be disposed on the front side of the antenna unit 60 in the front-to-rear direction.

[0143] In the combine harvester 1, the support frame 70 that supports the antenna unit 60 extends in the front-to-rear direction, with its front and rear ends fixed to the cabin left side surface 37, and the handrail 100 extends in the vertical direction, with its upper end connected to the support frame 70 and its lower end fixed to the cabin left side surface 37. With this configuration, the antenna unit 60 can be firmly supported relative to the cabin 30.

[0144] 4, the support frame 70 that supports the antenna unit 60 is fixed to the cabin left side 37 at two locations, front and rear, by a first fixing portion at the upper front side using a front mounting plate 76 and a second fixing portion at the upper rear side using a rear mounting plate 81. The lower end of a handrail portion 100, whose upper end is connected to the front-to-rear intermediate portion of the support frame 70, is fixed to the cabin left side 37 at a third fixing portion using a lower support bracket 120.

[0145] In this way, the support configuration for antenna unit 60 on cabin left side 37 is a frame structure in which support frame 70, supported at the front and rear by the first and second fixing parts, is supported from below by handrail part 100, one end of which is supported by the third fixing part. With this frame structure, antenna unit 60 can be firmly supported in a balanced manner on cabin left side 37 at three fixing parts located at the vertices of a substantially inverted isosceles triangle when viewed from the left side, that is, at three points: the first fixing part, the second fixing part, and the third fixing part, and sufficient support strength can be obtained.

[0146] Furthermore, with regard to the configuration of the support frame 70, the support frame 70 has an inclined portion 73 at the rear that is inclined from the front to the rear in a plan view in a direction approaching the cabin left side portion 37. With this configuration, it is possible to prevent the support frame 70 from contacting the discharge auger 9 that is located near the left side of the support frame 70 in the stored state. Note that, in a plan view, the extending direction of the inclined portion 73 is approximately parallel to the extending direction of the discharge auger 9 in the stored state.

[0147] Furthermore, in the combine harvester 1, the cabin 30 is configured to rotate to the right relative to the traveling body 4 to open, and the antenna unit 60 and handrail unit 100 are provided on the cabin left side surface 37, which is on the side opposite to the side on which the cabin 30 opens. With this configuration, when the cabin 30 is in the open state, the cabin left side surface 37 faces forward, and the front side of the antenna unit 60 and the handrail unit 100 becomes an open space. This allows for good workability when working on the antenna unit 60 while standing on a platform, stepladder, or the like, and improves workability.

[0148] Furthermore, in the combine harvester 1, the handrail section 100 is made of metal parts, and the upper end of the handrail section 100 is located below the antenna unit 60. With this configuration, the strength of the handrail section 100 can be easily ensured, and good processability can be achieved in manufacturing the handrail section 100. Furthermore, it is possible to prevent the handrail section 100 from interfering with radio wave reception by the antenna unit 60, and good sensitivity can be achieved for radio wave reception by the antenna unit 60. This ensures the accuracy of positioning the combine harvester 1 by the antenna unit 60.

[0149] The combine harvester 1 is also equipped with an auxiliary antenna 130, and the support portion of the auxiliary antenna 130 is provided on the upper support bracket 110 that forms the connection portion on the upper end side of the handrail portion 100 to the support frame 70. With this configuration, the auxiliary antenna 130 can be installed outside the cabin 30, compared to when the auxiliary antenna 130 is provided in the driver's section 12 inside the cabin 30, and therefore good communication sensitivity can be obtained.

[0150] Furthermore, because the auxiliary antenna 130 can be provided by utilizing the connection structure of the handrail section 100, the auxiliary antenna 130 can be installed with a simple configuration without requiring a separate configuration to support the auxiliary antenna 130. Furthermore, the connection portion of the handrail section 100 to the support frame 70 is less susceptible to the vibrations of the vehicle body than, for example, other portions of the support frame 70, so the auxiliary antenna 130 can be provided in a position that is advantageous for preventing vibrations of the auxiliary antenna 130. As described above, the configuration in which the auxiliary antenna 130 is erected at the connection portion of the handrail section 100 to the support frame 70 ensures the positioning accuracy of the combine 1 by the antenna unit 60 with a simple configuration.

[0151] [Antenna unit configuration] The configuration of the antenna unit 60 will be described with reference to Figures 14 to 18. Figures 14 and 16 show a state in which the upper case body 66 has been removed.

[0152] As shown in Figures 14 and 15, the antenna unit 60 has a wireless communication device 63, a receiving device 61, and an inertial navigation device 62 arranged from the front to the rear, and these devices are fixed to a horizontal plate-like device mounting plate 68 arranged parallel to the bottom portion 65a inside the case 64.

[0153] The device mounting plate 68 is provided inside the case 64 so as to cover substantially the entire bottom surface 65a from above, and has a substantially rectangular outer shape with the longitudinal direction extending in the front-to-rear direction to correspond to the shape of the bottom surface 65a. The device mounting plate 68 has an upper surface that serves as a horizontal mounting surface 68a on which various devices are attached. The four corners of the device mounting plate 68 have chamfered inclined edges. Furthermore, on both long sides of the device mounting plate 68 in the short direction (left-right direction), reinforcing bent surface portions 68b are formed that are bent downward at a right angle relative to the horizontal main body portion of the device mounting plate 68 (see FIG. 15 ). The device mounting plate 68 is a metal member, such as a steel plate, and is fixed to the bottom surface 65a of the lower case body 65 by fasteners such as bolts (not shown).

[0154] The wireless communication device 63 is provided on the front end of the device mounting plate 68. The wireless communication device 63 has a main body 63a having a substantially rectangular parallelepiped outer shape and two antenna units 63b, one in front and one in back, erected on the left side surface of the main body 63a. The wireless communication device 63 has fixing pieces 63c on both the front and back of the main body 63a for fixing the wireless communication device 63 to the device mounting plate 68. The fixing pieces 63c are plate-shaped parts that protrude outward from the lower edge of the main body 63a along the mounting surface 68a.

[0155] The wireless communication device 63 is fixed to the device mounting plate 68 by bolts 151 that pass through the fixing pieces 63c and the device mounting plate 68 from above. The bolts 151 are threaded into nuts 152 that are located on the underside of the device mounting plate 68. The fixing pieces 63c fix the wireless communication device 63 at four locations in total, two on each side of the front and rear of the main body 63a (see FIG. 14).

[0156] The inertial navigation system 62 is mounted on the rear end of the device mounting plate 68. The inertial navigation system 62 has a substantially rectangular outer shape in a plan view, and has a substantially inverted rectangular truncated shape that tapers downward. The inertial navigation system 62 is placed on the device mounting plate 68 and fixed to the device mounting plate 68 with bolts 153 that penetrate the device mounting plate 68 from below. The bolts 153 are threaded into female threads 154 that are provided inside the inertial navigation system 62 and open to the bottom surface of the inertial navigation system 62. The fixing points using the bolts 153 are provided in four locations, two on each side, front and rear (see Figure 14).

[0157] The receiving device 61 has a flattened outer shape that is a roughly rounded equilateral triangle in plan view, with one apex side facing right and the left side aligned in the front-to-rear direction. The receiving device 61 is mounted on the device mounting plate 68 via an antenna support base 160, midway between the front and rear of the device mounting plate 68.

[0158] The antenna support base 160 is a box-shaped member formed by bending a plate-shaped member into a predetermined shape. The antenna support base 160 is provided in a state where it is fixed to the device mounting plate 68. The antenna support base 160 forms a support surface 160a, which supports the receiving device 61, and is located at a height spaced above the device mounting plate 68.

[0159] The antenna support base 160 has a horizontal upper surface portion 161 with its upper surface serving as support surface 160a, a front surface portion 162 bent downward at a right angle from the front edge of the upper surface portion 161, a right side surface portion 163 bent downward at a right angle from the right edge of the upper surface portion 161, and a right rear side surface portion 164 bent downward at a right angle from the right rear edge of the upper surface portion 161.

[0160] The antenna support base 160 has fixing pieces 165a, 165b, and 165c on both the front and rear sides for fixing the antenna support base 160 to the device mounting plate 68. These fixing pieces have a predetermined shape so as not to interfere with other devices etc. attached to the device mounting plate 68. The front fixing pieces 165a and 165b are plate-shaped parts that protrude outward (to the front) from the lower end of the front surface portion 162 so as to follow the mounting surface 68a. The rear fixing piece 165c is a plate-shaped part that protrudes outward (to the rear right) from the lower end of the right rear side surface portion 164 so as to follow the mounting surface 68a.

[0161] The antenna support base 160 is fixed to the device mounting plate 68 by bolts 167 that penetrate the device mounting plate 68 and each of the fixing pieces 165a, 165b, and 165c from below. The bolts 167 are threaded into nuts 168 located on the upper side of the device mounting plate 68. The fixing portions of the antenna support base 160 by the bolts 167 are provided at four locations: one location each on the front fixing pieces 165a and 165b and two locations on the rear fixing piece 165c (see FIG. 16). Holes 166 for passing the bolts 167 are formed in each of the fixing pieces 165a, 165b, and 165c (see FIG. 17).

[0162] An opening 161a, which is a through-hole having a substantially equilateral triangle shape corresponding to the outer shape of the receiving device 61 in a plan view, is formed in the upper surface 161 of the antenna support base 160. The receiving device 61 is placed on the support surface 160a and fixed to the upper surface 161 of the antenna support base 160. The receiving device 61 is provided on the upper surface 161 so as to cover the entire opening 161a and is fixed to the upper surface 161 by a bolt 169. The bolt 169 penetrates the upper surface 161 from below and is screwed into a female threaded portion provided inside the receiving device 61 and opening toward the bottom surface of the receiving device 61 (see FIG. 15). The fixing portions using the bolts 169 are provided at three locations near each vertex of the substantially equilateral triangle opening 161a. The upper surface 161 is formed with holes 161b through which the bolts 169 pass.

[0163] In this way, the antenna support base 160, which constitutes a base for the receiving device 61 relative to the device mounting plate 68, forms a space 170 between itself and the device mounting plate 68 (see FIG. 15). The space 170 is a space portion formed by the device mounting plate 68, the top surface portion 161, the front surface portion 162, the right side surface portion 163, and the right rear side surface portion 164, and is open on the left side.

[0164] Cables (not shown) including power supply lines for receiving power, signal lines, etc. are connected to each of the receiving device 61, the inertial navigation system 62, and the wireless communication device 63 of the antenna unit 60. In the wireless communication device 63, a connector 63d for connecting the cable is provided on the right side surface of the main body 63a. In the receiving device 61, a connector 61d for connecting the cable is provided on the rear side surface. In the inertial navigation system 62, a connector (not shown) for connecting the cable is provided on the right side surface.

[0165] A cable insertion portion 69 serving as a guide hole for passing a cable is provided in a side surface on the right side of the front portion of the peripheral wall portion 65b of the lower case body 65. As a cable wiring configuration for the antenna unit 60, for example, a configuration is adopted in which branch cables connected to the connectors of each device inside the case 64 are aggregated into a single cable 175, and the aggregated cable 175 is extended to the outside of the case 64 via the cable insertion portion 69. The aggregated cable 175 extending to the outside from the case 64 is connected to a predetermined cable extending from the main machine side of the combine 1. In this way, in the antenna unit 60, the cables extend to the outside from the left and right inner sides of the case 64, i.e., from the cabin 30 side.

[0166] The antenna unit 60 has a converter 180 provided for the receiving device 61. The converter 180 is a DC / DC converter that controls the voltage of DC power to convert DC power to DC power, and has functions for converting and stabilizing voltage.

[0167] Converter 180 has a casing 181 having a substantially rectangular parallelepiped outer shape, and is installed on device mounting plate 68 within space 170 defined by antenna support base 160. Converter 180 is provided so that the entire converter fits within space 170, tilted at an angle of approximately 30° to the left and right in a plan view. The installation orientation of converter 180 is not particularly limited.

[0168] Converter 180 is fixed to device mounting plate 68 by bolts 183 at plate-shaped fixing portions 182 formed in notches at a pair of diagonally positioned corners of casing 181 in plan view. Bolt 183 passes through fixing portions 182 and device mounting plate 68, and is screwed into nut portions 184 located on the underside of device mounting plate 68.

[0169] The converter 180 controls the power sent from the power source to the receiving device 61. As shown in Fig. 18 , the converter 180 receives DC power supplied from a power source unit 190 such as an auxiliary battery provided in the combine harvester 1, and boosts the voltage of this DC power to generate a high voltage. The DC power converted by the converter 180 is supplied to the receiving device 61.

[0170] Converter 180 has a first terminal which is a terminal for an input power supply connected to power supply unit 190, and a second terminal which is a terminal for an output power supply that receives connection to one end of a first connection line 191, the other end of which is connected to receiving device 61. Converter 180 also has a third terminal which is a terminal for an input GND that receives connection to the other end of a second connection line 192, the other end of which is connected to the GND of receiving device 61, and a fourth terminal which is a terminal for an output GND that is connected to GND.

[0171] 16, converter 180 has connector 185 including first to fourth terminals. Connector 185 is provided on the right side surface of casing 181 of converter 180. A branch cable for converter 180 that branches off from aggregated cable 175 inside case 64 is connected to connector 185.

[0172] As described above, by providing the antenna unit 60 with the converter 180 for the receiving device 61, the boosting action of the converter 180 can ensure that a sufficient voltage is obtained for the power supplied to the receiving device 61 and that the voltage can be stabilized, thereby ensuring good operating conditions of the antenna unit 60.

[0173] For example, in a configuration in which power is supplied to the receiving device 61 from an auxiliary battery that supplies power to various electronic devices provided in the combine harvester 1, it is difficult to obtain a sufficient voltage for the power supplied to the receiving device 61. In particular, when starting the engine, a voltage drop caused by cranking may cause the receiving device 61 to be reset (the antenna to be reset), and in such a case, the satellite positioning information and azimuth angle information may be reset, and resetting may be required to perform satellite positioning.

[0174] Therefore, by providing converter 180 with a boost function, it is possible to boost the voltage of the power supplied to receiving device 61 and stabilize the voltage to receiving device 61. This makes it possible to suppress problems such as resetting the antenna as described above, and to realize an antenna unit 60 that is easy to use.

[0175] Furthermore, in the antenna unit 60, the converter 180 is provided in a space 170 formed below the receiving device 61 by the antenna support base 160 on the device mounting plate 68. This configuration makes it possible to effectively utilize the space within the case 64 and shorten the connecting lines such as cables connected to the receiving device 61 and the converter 180. This allows the antenna unit 60 to be made more compact.

[0176] Furthermore, by installing the receiving device 61 on the antenna support base 160, the receiving device 61 can be placed at a higher position relative to the inertial navigation system 62 and the wireless communication device 63. This allows the antenna unit 60 to obtain good sensitivity for receiving radio waves, thereby ensuring the accuracy of positioning the combine 1 by the antenna unit 60.

[0177] [Other embodiments] Another embodiment of the support structure of the antenna unit 60 will be described with reference to Figures 19 to 21. Note that the same reference numerals will be used to designate the same components as those in the above-described embodiment, and the description thereof will be omitted.

[0178] The configuration of this embodiment differs from the above-described embodiments in that the position of the antenna unit 60 is changeable. The antenna unit 60 according to this embodiment is provided so that its height position, which is the vertical position, can be changed between a first height position where the entire antenna unit 60 is positioned above the support frame 70, and a second height position where at least a portion of the antenna unit 60 overlaps the support frame 70.

[0179] 19 to 21, in this embodiment, the antenna unit 60 is provided to be rotatable about a rotation axis O1 that is located on the lower right side of the antenna unit 60 and that extends in the front-to-rear direction. That is, as shown in Fig. 19 and Fig. 20, the antenna unit 60 is at a first height position when it is horizontal with the bottom surface 65a horizontal, and is at a second height position when it is rotated about the rotation axis O1 in a direction lowering the left side (the right side in Fig. 20) so that the bottom surface 65a is tilted downward to the left.

[0180] In the following, the state of the antenna unit 60 at the first height position is referred to as the normal state, and the state of the antenna unit 60 at the second height position is referred to as the tilted state. Unless otherwise specified, the normal state of the antenna unit 60 will be described below.

[0181] The antenna unit 60 is supported in a fixed state by support brackets 200 provided at two locations, front and rear, on the front-rear extension portion 72 of the support frame 70. The front support bracket 200 is provided on the support frame 70 near the corner formed by the front fixed portion 71 and the front-rear extension portion 72, and the rear support bracket 200 is provided in the front-rear intermediate portion of the front-rear extension portion 72.

[0182] The support bracket 200 is fixed to a mounting plate 210 that is fixed to the support frame 70. In other words, the support bracket 200 is provided to the support frame 70 via the mounting plate 210. The front and rear support brackets 200 are fixed to the integral mounting plate 210. In other words, the front support bracket 200 is fixed to the front side of the mounting plate 210, and the rear mounting plate 210 is fixed to the rear side of the mounting plate 210. The mounting plate 210 and the front and rear support brackets 200 are configured to be symmetrical or approximately symmetrical in the front-to-rear direction when viewed from the left side. Note that in Figure 19, the rear support bracket 200 is shown in cross section.

[0183] The mounting plate 210 is a longitudinal member formed by bending a plate-like member, and is provided above the longitudinal extension portion 72, with its longitudinal direction being the front-to-rear direction. The mounting plate 210 has a main body plate portion 211 which is a flat plate portion that makes up the majority of the mounting plate 210, and mounting plate portions 212 provided on both ends of the main body plate portion 211 in the longitudinal direction.

[0184] The main body plate 211 has a narrow section 211a in the longitudinal middle, which has a relatively narrow predetermined width, and wide sections 211b at both longitudinal ends, which are wider than the narrow section 211a (see FIG. 19). The front and rear wide sections 211b gradually widen from the narrow section 211a toward the front and rear ends, and have oblique sides on both widthwise sides. The widthwise dimension of the wide sections 211b is, for example, approximately the same as the longitudinal (left-right) dimension of the mounting bracket 91 in the above-described embodiment.

[0185] The mounting plate portion 212 is a portion that is bent downward at a right angle from the front and rear ends of the main body plate portion 211. Semicircular cutout portions 212a into which the front and rear extension portions 72 are fitted are formed on the lower side of the central portions on the left and right sides of the mounting plate portion 212.

[0186] The mounting plate 210 is fixed to the front-rear extending portions 72 by welding or the like, with the front-rear extending portions 72 fitted into the cutouts 212a of the front and rear mounting plate portions 212. The mounting plate 210 is provided in an inclined manner so that the main body plate portion 211 is inclined downward to the left. When viewed in the axial direction of the rotation axis O1, the angle that the main body plate portion 211 makes with respect to the horizontal plane is, for example, about 20°.

[0187] The support bracket 200 is a longitudinal member formed by bending a plate-like member, and is provided above the front-to-rear extension portion 72 of the support frame 70 so that its longitudinal direction is the left-to-right direction and is perpendicular to the axial direction of the front-to-rear extension portion 72 when viewed in a plane.

[0188] The support bracket 200 has a fixing surface portion 221 whose plate thickness direction is in the front-to-rear direction, a horizontal support surface portion 222 bent at a right angle from the upper end of the fixing surface portion 221, and a side surface portion 223 bent at a right angle from the left end of the fixing surface portion 221. In the support bracket 200, the support surface portion 222 is the surface portion that receives the attachment of the case 64 of the antenna unit 60. The support surface portion 222 is located at a height above the upper end of the main body plate portion 211 of the mounting plate 210.

[0189] When viewed in the axial direction of the rotation axis O1, the fixing surface portion 221 has a shape that extends in the left-right direction, and has a protruding portion 221a on the left side that protrudes downward further than the front-rear extending portion 72, resulting in a generally L-shaped overall shape. A concave notch 221b is formed below the center of the left and right sides of the fixing surface portion 221, into which the front-rear extending portion 72 is fitted.

[0190] The front support bracket 200 is positioned in front of the front mounting plate portion 212 of the mounting plate 210, with the fixing surface portion 221 facing rearward, and is fixed to the mounting plate 210 at two locations on both the left and right sides by a first bolt 231 and a second bolt 232 serving as fixing supports, with the fixing surface portion 221 overlapping the mounting plate portion 212. The first bolt 231 and the second bolt 232 pass through the fixing surface portion 221 and the mounting plate portion 212 and are threaded into nuts 235 provided on the rear side of the mounting plate portion 212. The fixing portion provided by the first bolt 231 is located to the right of the front-rear extending portion 72 of the support frame 70, and the fixing portion provided by the second bolt 232 is located to the left of the front-rear extending portion 72.

[0191] The rear support bracket 200 is positioned behind the rear mounting plate portion 212 of the mounting plate 210, with the fixing surface portion 221 facing forward, and is fixed to the mounting plate 210 at two locations on both the left and right sides by third bolts 233 and fourth bolts 234 serving as fixing supports, with the fixing surface portion 221 overlapping the mounting plate portion 212. The third bolt 233 and the fourth bolt 234 pass through the fixing surface portion 221 and the mounting plate portion 212 and are threaded into nuts 236 provided on the front side of the mounting plate portion 212. The fixing portion provided by the third bolt 233 is located to the right of the front-rear extending portion 72 of the support frame 70, and the fixing portion provided by the fourth bolt 234 is located to the left of the front-rear extending portion 72.

[0192] The case 64 of the antenna unit 60 is fixed to the support surface portions 222 of these front and rear support brackets 200 by fixing bolts 96. Fixing portions for the fixing bolts 96 are provided at two locations, on both the left and right sides, in each support bracket 200. For this reason, hole portions 222a for passing the fixing bolts 96 are formed in two locations, on both the left and right sides, in the support surface portion 222 of the support bracket 200. The fixing bolts 96 pass through the support surface portion 222 of the support bracket 200 from below and are screwed into the female thread portions 97 (see FIG. 10 ), fixing the case 64 to the support bracket 200.

[0193] In this embodiment, the antenna unit 60 is provided at a height position slightly higher in the vertical direction than the roof portion 35. In other words, the antenna unit 60 has the upper surface portion of the case 64 positioned slightly above the upper surface portion 50a of the roof panel 50.

[0194] In the support structure for the antenna unit 60 as described above, the antenna unit 60 is integrally provided with the front and rear support brackets 200 and is rotatable about a rotation axis O1 relative to a mounting plate 210 fixed to the support frame 70.

[0195] The rotation support portion that supports the antenna unit 60 around the rotation axis O1 is made up of a fixing portion secured by a first bolt 231 on the front support bracket 200 and a fixing portion secured by a third bolt 233 on the rear support bracket 200. That is, the central axes of the first bolt 231 and the third bolt 233 are positioned on a common straight line along the front-to-rear direction, i.e., on the rotation axis O1.

[0196] Furthermore, in the front and rear support brackets 200, the second bolt 232 and the fourth bolt 234 have their central axes positioned on a common straight line L1 along the front-rear direction. The second bolt 232 and the fourth bolt 234 each pass through an elongated hole 221c formed in the fixing surface portion 221 of the support bracket 200, with the longitudinal direction extending approximately in the up-down direction. The elongated hole 221c is formed in the left portion of the fixing surface portion 221, extending from the upper portion to the protruding portion 221a. When viewed in the axial direction of the rotation axis O1, the elongated hole 221c has a curved shape that follows an arc centered at the position of the rotation axis O1.

[0197] In this way, the rotating body including the front and rear support brackets 200 and the antenna unit 60 is rotatably arranged around the rotation axis O1, with the fixed portion formed by the first bolt 231 and the third bolt 233 as the fixed side support portion, and the fixed portion formed by the second bolt 232 and the fourth bolt 234 as the movable side support portion.

[0198] An example of the procedure for rotating the antenna unit 60 will be described. As shown in Figures 19 and 20, from the normal state of the antenna unit 60, the first bolt 231, the second bolt 232, the third bolt 233, and the fourth bolt 234 are loosened. This allows the front and rear support brackets 200 and the antenna unit 60 fixed thereto to rotate about the rotation axis O1.

[0199] Thereafter, the antenna unit 60 and the front and rear support brackets 200 are rotated clockwise (right) when viewed from the front until they are inclined, that is, from the first height position to the second height position (see arrow M1 in FIG. 21). Here, the elongated holes 221c in the front and rear support brackets 200 serve as guide holes, and the second bolt 232 and the fourth bolt 234 move along the elongated holes 221c. After the antenna unit 60 and the front and rear support brackets 200 have been moved to the second height position, the first to fourth bolts are tightened to fix the front and rear support brackets 200 to the mounting plate 210, and the antenna unit 60 is inclined.

[0200] The rotation angle of the antenna unit 60 around the rotation axis O1 from the normal state to the tilted state is, for example, about 20°. The tilt angle of the antenna unit 60 in the tilted state is the same or approximately the same as the tilt angle of the main body plate portion 211 of the mounting plate 210 with respect to the horizontal plane. The rotation angle of the antenna unit 60 is not particularly limited.

[0201] When the antenna unit 60 is in a normal state, the second bolt 232 and the fourth bolt 234 are located at or near the lower end of the elongated hole 221c, and when the antenna unit 60 is in a tilted state, the second bolt 232 and the fourth bolt 234 are located at or near the upper end of the elongated hole 221c. In addition, the notch 221b of the support bracket 200 is formed so as not to interfere with the front-to-rear extending portion 72 of the support frame 70 within the rotation range of the antenna unit 60.

[0202] In a normal state, the antenna unit 60 is positioned on the support surface portion 222 of the support bracket 200 which is positioned at a height higher than the support frame 70 , and the entire antenna unit 60 is positioned higher than the support frame 70 .

[0203] Meanwhile, in the tilted state, the antenna unit 60 has a portion located within the height range of the support frame 70. Specifically, as shown in Fig. 21 , the height range in which the support frame 70 is located is a height range ΔH from a height position H1 of the upper end of the rear fixed part 74 to a height position H2 of the lower end of the front fixed part 71 that is located below the rear fixed part 74.

[0204] In contrast, when the antenna unit 60 is in the tilted state, a height position H3 of the lower end of the case 64, which is the lower end of the antenna unit 60, is located within the height range ΔH. In other words, the height position H3 of the lower end of the antenna unit 60 is located below the height position H1 of the upper end of the support frame 70 and above the height position H2 of the lower end of the support frame 70. Note that when the antenna unit 60 is in the tilted state, most of the upper side is located above the support frame 70, i.e., above the height position H1.

[0205] According to the support configuration of the antenna unit 60 of this embodiment, by tilting the antenna unit 60, the antenna unit 60 can be positioned lower than in the normal state. This allows the handrail 100 to improve safety when a worker is standing on a platform or stepladder, such as when removing the antenna unit 60, adjusting its height, or performing maintenance, and the like, and also makes it easier to handle the antenna unit 60, improving workability.

[0206] In this embodiment, a configuration for rotating the antenna unit 60 around the rotation axis O1 is employed as a configuration for changing the height position of the antenna unit 60, but the configuration for changing the height position of the antenna unit 60 is not limited to this configuration. The configuration for changing the height position of the antenna unit 60 may be, for example, a configuration in which the antenna unit 60 is moved in parallel while maintaining the antenna unit 60 in a horizontal state.

[0207] The above-described embodiments are merely examples of the present invention, and the present invention is not limited to the above-described embodiments. Therefore, even if the embodiments are different from those described above, various modifications can be made depending on the design, etc., as long as they do not deviate from the technical concept of the present invention. Furthermore, the effects described in this disclosure are merely examples and are not limiting, and other effects may also be present.

[0208] In the above-described embodiment, the support frame 70 serving as a support member is configured from a pipe-shaped member, but the support member is not limited to this configuration. The support member according to the present invention may be configured from, for example, a plate-shaped member. [Explanation of symbols]

[0209] 1 Combine (work vehicle) 4 Running body 12 Driving Department 30 Cabin 35 Roof section 37 Cabin left side (one side) 50 roof panel 60 Antenna Unit 70 Support frame (support member) 76 Front mounting plate 81 Rear mounting plate 100 Handrail section 110 Upper support bracket 115 Fixing Plate 120 Lower support bracket 130 Auxiliary Antenna (Antenna) 200 Support Bracket 210 Mounting plate

Claims

1. A work vehicle equipped with a cabin covering the driver's section, an antenna unit provided on an upper portion of one of the left and right side portions of the cabin; a handrail provided on the one side surface and used for performing work on the antenna unit; a support member provided on the one side surface and supporting the antenna unit, The handrail portion is configured to extend vertically, and is provided with an upper end connected to the support member and a lower end fixed to the one side surface portion, The antenna unit and the handrail portion are disposed so as to be positioned in front of and behind each other in a plan view. A work vehicle characterized by:

2. The cabin is rotatable about an axis in the vertical direction relative to the traveling body so as to open outward in the left-right direction of the body of the work vehicle, The one side surface is one of the left and right side surfaces of the cabin that is located on the inner side in the left-right direction of the aircraft.

2. The work vehicle according to claim 1.

3. The handrail is made of a metal part, and its upper end is positioned at a height lower than the antenna unit.

3. The work vehicle according to claim 1 or 2.

4. A work vehicle equipped with a cabin covering the driver's section, an antenna unit provided on an upper portion of one of the left and right side portions of the cabin; a handrail provided on the one side surface and used for performing work on the antenna unit; a support member provided on the one side surface and supporting the antenna unit, The handrail portion is configured to extend vertically, and is provided with an upper end connected to the support member and a lower end fixed to the one side surface portion, The antenna unit is provided so as to be positionable between a first height position where the entire antenna unit is positioned above the support member and a second height position where at least a portion of the antenna unit overlaps the support member. A work vehicle characterized by:

5. A work vehicle equipped with a cabin covering the driver's section, an antenna unit provided on an upper portion of one of the left and right side portions of the cabin; a handrail provided on the one side surface and used for performing work on the antenna unit; a support member provided on the one side surface and supporting the antenna unit, The handrail portion is configured to extend vertically, and is provided with an upper end connected to the support member and a lower end fixed to the one side surface portion, an antenna for acquiring information about the antenna unit; The antenna is provided at a connection portion of the handrail portion to the support member. A work vehicle characterized by:

6. A work vehicle equipped with a cabin covering the driver's section, an antenna unit provided on an upper portion of one of the left and right side portions of the cabin; a handrail provided on the one side surface and used for performing work on the antenna unit; a support member provided on the one side surface and supporting the antenna unit, the support member is configured to extend in the front-rear direction, and a front end portion and a rear end portion are provided in a state where they are fixed to the one of the side surface portions, The handrail portion is configured to extend vertically, and is provided with an upper end connected to the support member and a lower end fixed to one of the side surfaces. A work vehicle characterized by:

Images