Work vehicle

Abstract

To improve safety of work for an antenna unit, in a constitution having the antenna unit provided in a height position of an upper part of a cabin.SOLUTION: A work vehicle having a cabin 30 for covering an operation part 12 comprises an antenna unit 60 that is provided in an upper part of a cabin left-side surface part 37 which is one of right and left lateral parts of the cabin 30, and a handrail part 100 that is provided on the cabin left-side surface part 37. The handrail part 100 has an inclined extension part 102 that is constituted to extend in a vertical direction and the axial direction of which is a direction inclined with respect to the vertical direction.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 Art

[0002] Conventionally, a work vehicle equipped with an antenna unit for receiving position information from a satellite is known (see, for example, Patent Document 1). Patent Document 1 discloses a configuration in which, as an antenna unit, a receiving device such as a GNSS (Global Navigation Satellite System) receiver that receives radio waves related to position information from a positioning satellite, an arithmetic unit 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 arithmetic unit are provided, and these devices are housed in a case.

[0003] In the configuration disclosed in Patent Document 1, the antenna unit is disposed at the upper part of the side surface of a cabin that covers the driving part in a combine as a work vehicle. Specifically, the case of the antenna unit is supported via a support frame with respect to the left side portion of the roof of the cabin, which is the upper part of the left side surface portion of the cabin.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] According to the configuration disclosed in Patent Document 1, for example, in a configuration where an antenna unit is provided at the upper part of the side surface of a cabin, such as the side part of the roof of the cabin, since the antenna unit is at a high position, when performing operations such as removal, position adjustment, and maintenance of the antenna unit, the operator has to work while standing on a platform or a stepladder. There are concerns about safety in the work while standing on a platform or a stepladder.

[0006] The present invention has been made in view of the above problems, and an object of the present invention is to provide a work vehicle capable of improving the safety of work on an antenna unit in a configuration where the antenna unit is provided at a height position above the cabin.

Means for Solving the Problems

[0007] The work vehicle according to the present invention is a work vehicle including a cabin that covers a driver's cab, and includes an antenna unit provided at an upper part of one of the left and right side surfaces of the cabin, and a handrail provided on the one side surface and used for performing work on the antenna unit.

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

[0009] In the work vehicle according to the present invention, the work vehicle includes 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 the front end portion and the rear end portion are provided in a state of being fixed to the one side surface. The handrail is configured to extend in the up-down direction, and the upper end portion is connected to the support member and the lower end portion is provided in a state of being fixed to the one side surface.

[0010] In the work vehicle according to the present invention, in the work vehicle, the cab is provided so as to be rotatable about a vertical axis with respect to the traveling body so as to open to the outside in the left-right direction of the body of the work vehicle, and the one side surface portion is the side surface portion located on the inner side in the left-right direction of the body among the left and right side surface portions of the cab.

[0011] In the work vehicle according to the present invention, in the work vehicle, the handrail portion is composed of metal parts and is provided so that the upper end is positioned at a height lower than that of the antenna unit.

[0012] In the work vehicle according to the present invention, in the work vehicle, the antenna unit is provided so that its position can be changed to a first height position where the whole is positioned above the support member and a second height position where at least a part thereof overlaps with the support member, with respect to the height position which is the vertical position.

[0013] In the work vehicle according to the present invention, in the work vehicle, an antenna for acquiring information about the antenna unit is provided, and the antenna is provided at the connecting portion of the handrail portion with respect to the support member.

Advantages of the Invention

[0014] According to the present invention, in the configuration in which the antenna unit is provided at the height position above the cab, the work safety with respect to the antenna unit can be improved.

Brief Description of the Drawings

[0015]

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Embodiments for Carrying Out the Invention

[0016] In the present invention, in a configuration in which an antenna unit for receiving position information from a satellite is provided at a height position above the cabin that covers the driving unit, by providing a handrail portion on the cabin, an attempt is made to improve the safety of work on the antenna unit. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0017] In the embodiments of the present invention described below, a combine harvester will be described as an example of the 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 driving unit. Examples of work vehicles to which the present invention is applied include various combine harvesters such as self-threshing combines and ordinary combines, as well as tractors and wheel loaders for civil engineering work.

[0018] Using FIGS. 1 to 3, the overall configuration of the combine harvester 1 as the work vehicle according to the present embodiment will be described. In the following description, the left and right sides facing the front of the combine harvester 1 are defined as the left and right sides of the combine harvester 1, respectively.

[0019] As shown in FIGS. 1 to 3, the combine harvester 1 includes a traveling unit 2 configured as a crawler-type traveling device having a pair of left and right crawler units 3, 3, and a traveling body 4 supported by the traveling unit 2. The combine harvester 1 includes a cutting unit 5, a threshing unit 6, a grain tank 7, a sorting unit 8, a discharge auger 9, and a straw processing unit 10. An engine 11 as a drive source is mounted on the traveling body 4. Further, the combine harvester 1 includes a cabin 30 that covers the driving unit 12.

[0020] Each crawler section 3 that constitutes the traveling unit 2 includes a track frame 3a extending in the front-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 3b wound around these rotating bodies. The crawler section 3 is driven by receiving the transmission of the power of the engine 11 at the drive sprocket 3c.

[0021] The mowing unit 5 is a device configuration for taking in while mowing the cereal straws in the field, and is provided at the front part of the traveling body 4. The mowing unit 5 is provided over substantially the entire width of the body of the combine 1 on the front side of the traveling body 4. The mowing unit 5 is mounted on the traveling body 4 so as to be rotatable about a predetermined axis via a hydraulic cylinder for lifting, and is provided so as to be adjustable in height by a rotating operation caused by the expansion and contraction operation of the hydraulic cylinder.

[0022] The mowing unit 5 has a mowing support frame 5a as a mowing frame, and a weeding body 5b, a lifting device 5c, a cutting blade device 5e, and a cereal straw conveying device 5f are supported on the mowing support frame 5a. The mowing unit 5 weeds the cereal straws in the field by the weeding body 5b, lifts the weeded cereal straws by the lifting device 5c, and while conveying the lifted cereal straws rearward by the cereal straw conveying device 5f, cuts and mows them by the cutting blade device 5e. The cereal straws mowed by the mowing unit 5 are conveyed to the threshing unit 6. Each device included in the mowing unit 5 operates by receiving the transmission of power from the engine 11.

[0023] The mowing unit 5 is provided so as to be side-openable with respect to the traveling body 4. Specifically, the mowing support frame 5a that constitutes the mowing unit 5 is rotatably supported by the traveling body 4 by a rotation support portion whose axial direction is along the vertical direction. The rotation support portion is provided, for example, on the left side of the traveling body 4. The mowing unit 5 rotates from its normal state facing forward to face leftward about the rotation axis by the rotation support portion, and rotates within an angular range until it reaches a state of facing leftward, for example.

[0024] On the traveling body 4, a threshing unit 6 that threshes the cereal straw cut by the cutting unit 5 and a grain tank 7 as a grain storage unit that stores the grains taken out from the threshing unit 6 are provided side by side horizontally. The threshing unit 6 is disposed on the left side of the body, and the grain tank 7 is disposed on the right side of the body. The combine 1 performs operations such as cutting the cereal straw by the cutting unit 5 and threshing by the threshing unit 6 while traveling by the traveling unit 2.

[0025] The threshing unit 6 includes a handling cylinder 6a having the front-rear direction as the rotation axis direction and a processing cylinder (not shown), and a cereal straw supply device (not shown) provided to the left of the handling cylinder 6a. The cereal straw supply device sandwiches the root of the cereal straw cut by the cutting unit 5 and conveys the cereal straw backward in a lying posture with the spike tip facing the handling cylinder 6a side. The cereal straw supply device includes a feed chain wound around a plurality of sprockets having the left-right direction as the rotation axis direction, and a cereal straw supply clamping body that cooperates with the feed chain to clamp the root of the cereal straw.

[0026] Below the threshing unit 6 on the traveling body 4, a sorting unit 8 that sorts the processed material threshed by the threshing unit 6 is provided. The sorting unit 8 includes a swinging sorting device 8a, a wind sorting device (not shown), and a grain conveying device. The sorting unit 8 swings and sorts the processed material that has fallen from the threshing unit 6 by the swinging sorting device 8a, and wind-sorts the processed material after the swinging sorting by the wind sorting device. Among the processed materials after the wind sorting, the sorting unit 8 conveys the grains rightward toward the grain tank 7 by the grain conveying device, and blows the straw scraps and dust backward by the wind sorting device to discharge them outside the body. The grains conveyed toward the grain tank 7 by the grain conveying device are stored in the grain tank 7.

[0027] On the traveling body 4, a discharge auger 9 as a grain discharge device for discharging the grains in the grain tank 7 to the outside is provided. The discharge auger 9 is provided so as to be pivotable with respect to the traveling body 4 via a vertical extraction conveyor 9b provided on the right rear side of the traveling body 4. Further, the discharge auger 9 is provided so as to be vertically liftable and rotatable about its base.

[0028] The discharge auger 9 is in a stored state in which it extends horizontally from the vertical extraction conveyor 9b on the right rear side of the traveling body 4 toward the left front. In the stored state, the discharge auger 9 is positioned, in plan view, at the left side portion of the cutting unit 5 and extends along the diagonal line of the machine body (see Fig. 3). The discharge auger 9 is placed and supported on the auger rest 27 as an auger receiving part to be in the stored state.

[0029] The auger rest 27 is provided in a state of being supported by a predetermined support member on the left side at the rear part of the cabin 30. The auger rest 27 has a concave shape with the upper side being the open side so as to store and support the cylindrical discharge auger 9 in a positioned state, and supports a predetermined part at the middle part in the extending direction of the discharge auger 9 from below.

[0030] The grains stored in the grain tank 7 are conveyed by the discharge auger 9 equipped with a screw conveyor and discharged from the discharge port 9a provided at the tip of the discharge auger 9. The grains discharged from the discharge port 9a are put into the truck bed, container, etc. The discharge auger 9 rotates in the left - right direction or up - down direction of the machine body from the stored state during the grain discharge operation to move the discharge port 9a to the outside of the machine body.

[0031] On the traveling body 4, behind the threshing unit 6, a straw - discharging processing unit 10 for processing the straw discharged after the threshing process by the threshing unit 6 is provided. The straw - discharging processing unit 10 has a straw - discharging conveyor 10a and a straw - cutting device 10b. The straw - discharging conveyor 10a conveys the threshed straw (stalks) rearward by the threshing unit 6 to discharge them outside the machine body or convey them to the straw - cutting device 10b. The straw - cutting device 10b cuts the stalks conveyed from the straw - discharging conveyor 10a and discharges them outside the machine body.

[0032] On the traveling body 4, on the right side of the cutting unit 5 and in front of the grain tank 7, there is an operating unit 12 covered by a cabin 30. That is, the operating unit 12 is provided in the cabin 30 above the front part of the traveling body 4. At the front part of the operating unit 12, a steering wheel 13 is provided as a steering operation unit, and behind the steering wheel 13, a driver's seat 14 is provided. Also, on the left side of the driver's seat 14, various operating tools including a main transmission lever 15 are arranged.

[0033] Below and behind the operating unit 12, a prime mover unit including an engine 11 is provided. The power of the engine 11 is transmitted through a transmission device and the like to various devices of each part provided in each part of the combine 1, such as the traveling part 2, the cutting unit 5, the threshing unit 6, the sorting unit 8, the discharge auger 9, and the straw treatment unit 10. The engine 11 is a diesel engine. On the right side of the engine 11, an engine cover 16 that covers the right side of the engine room is provided.

[0034] In addition, the combine 1 is provided with an exhaust gas purification device 17 for purifying the 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 introduces the exhaust gas from the engine 11 into these cases to remove particulate matter such as soot and nitrogen oxides (NOx) contained in the exhaust gas, thereby purifying the exhaust gas. The exhaust gas purification device 17 is provided above the main body part of the engine 11 and at the position of the left rear side of the cabin 30.

[0035] The configuration of the cabin 30 will be described with reference to FIGS. 4 to 6. The cabin 30 has a front part 31, a rear part 32, a left side wall part 33, a right side wall part 34, a roof part 35 forming a ceiling part, and a floor part 36, and is configured in a substantially box shape as a whole by these parts.

[0036] The front portion 31 of the cabin 30 has a forwardly inclined front upper surface portion 31a that constitutes the majority of its upper side, and a downwardly inclined front lower surface portion 31b that constitutes approximately the lower half of the front portion 31, and as a whole has a bent shape that is concave towards the rear in a side view. The front upper surface portion 31a is formed as an overall transparent window portion by a rectangular transparent plate made of glass, acrylic resin, polycarbonate resin, or the like. The front lower surface portion 31b is constituted by a metal member such as a steel plate.

[0037] The rear portion 32 of the cabin 30 has a rearwardly inclined shape in a side view. That is, the rear portion 32 is provided as an inclined surface portion that slopes downward from the front side to the rear side and upward from the lower side as a whole.

[0038] The left side wall portion 33 of the cabin 30 has a lower portion as a lower side surface portion 41 that is a sheet metal portion constituted by a steel plate or the like (see FIG. 4). In the left side wall portion 33, a linear left support portion 42 extending along the vertical direction is provided at an intermediate portion in the front-rear direction.

[0039] The left support portion 42 is provided so as to extend substantially throughout the vertical direction in the left side wall portion 33. The left support portion 42 is a hollow column portion having a rectangular shape in a plane cross-sectional view and has a vertical flat left side surface 42a. The left support portion 42 is provided so that the left side surface 42a protrudes slightly to the left with respect to other portions in the left side wall portion 33.

[0040] In the left side wall portion 33, a rectangular left rear window portion 43 is provided above the lower side surface portion 41 and behind the left support portion 42. The left rear window portion 43 is constituted by attaching a rectangular transparent plate 45 such as glass to a frame-shaped portion formed in the upper part of a left side plate 44 that forms a portion behind the left support portion 42 in the left side wall portion 33. The lower side surface portion 41 is formed by the lower part of the left side plate 44.

[0041] In the left side wall portion 33, the portion in front of the left rear window portion 43 is the left front window portion 47. The left front window portion 47 has a substantially inverted trapezoidal shape, with the front edge portion along the forwardly inclined slope of the front upper surface portion 31a of the front surface portion 31 and the rear edge portion along the upper portion of the left support portion 42. The left front window portion 47 is formed of a rectangular transparent plate made of glass, acrylic resin, polycarbonate resin, etc., and is provided in substantially the same range as the front upper surface portion 31a of the front surface portion 31 in the vertical direction.

[0042] In the left side wall portion 33, an upper front side plate 57 is provided above the left front window portion 47. The upper front side plate 57 forms the upper edge portion of the portion in front of the left support portion 42 of the left side wall portion 33. The lower part of the upper front side plate 57 overlaps the upper edge portion of the left front window portion 47 from the inner side (right side).

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

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

[0045] The roof portion 35 has a flat outer shape and is configured to be hollow. The roof portion 35 has a lower panel (not shown) forming the base of the roof portion 35 and a roof panel 50 provided above the lower panel, and a hollow portion is formed by these panels. The roof panel 50 has an upper surface portion 50a and left and right side surface portions 50b bent downward on both the left and right sides of the upper surface portion 50a. The roof panel 50 is a cover member provided so as to entirely cover the lower panel portion from above and both the left and right sides.

[0046] Further, the left side surface portion 50b of the roof panel 50 covers the upper edge portion of the left side 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 side wall portion 34 from the right. Inside the roof portion 35, an indoor unit of an air conditioner or the like provided in the combine 1 is provided.

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

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

[0049] The combine 1 according to the present embodiment includes an antenna unit 60 for receiving position information from a satellite. The antenna unit 60 is provided at the upper part of the cabin left side surface portion 37 among the left and right side surface portions of the cabin 30. The antenna unit 60 is provided in a state of being supported via a predetermined support member with respect to the cabin 30 so as to be located in the vicinity of the upper left of the upper part of the cabin left side surface portion 37.

[0050] The antenna unit 60 has a box-shaped outer shape that is substantially rectangular in plan view, and is provided in a direction in which the longitudinal direction is the front-rear direction. The antenna unit 60 is provided at substantially the same height position as the roof portion 35 in the vertical direction. Specifically, the antenna unit 60 is provided such that the vertical dimension is substantially the same as the vertical dimension of the side surface portion 50b of the roof panel 50, and in the vertical direction, substantially the entire vertical direction is positioned within the height range of the side surface portion 50b of the roof panel 50.

[0051] The antenna unit 60 is located in front of the left support part 42 provided on the left side surface part 37 of the cabin in the front-rear direction. Specifically, the antenna unit 60 has its rear end located in the vicinity of the left support part 42 in the front-rear direction, and is provided along the upper edge part of the left front window part 47 in a left side view. The antenna unit 60 has substantially the same length as the upper edge part of the left front window part 47 in the front-rear direction. The antenna unit 60 has a dimension that is approximately 1 / 3 of the overall length of the roof part 35 in the front-rear direction, and is provided so as to be located on the left front side with respect to the roof part 35 (see Fig. 6).

[0052] The antenna unit 60 is provided so that its right side surface part is located directly to the left of the left side surface part 50b of the roof panel 50 in the left-right direction. In this way, the antenna unit 60 is adjacently arranged to the left of the front part of the roof part 35 with respect to the cabin 30.

[0053] According to such an arrangement configuration of the antenna unit 60, in the configuration where the cabin 30 is provided at the right front part of the combine 1 body, the antenna unit 60 is located at substantially the center part of the body in the left-right direction (see Fig. 3). Further, since the antenna unit 60 is located at the front left of the roof part 35, the light distribution by the lighting unit 51 and the view from inside the cabin 30 are not obstructed by the antenna unit 60.

[0054] Also, a space is formed between the left side of the cabin 30 and the discharge auger 9 in the stored state, and the antenna unit 60 is arranged using that space. The discharge auger 9 rotates to the left or above the body from the stored state. Therefore, the antenna unit 60 does not interfere with the discharge auger 9.

[0055] The antenna unit 60 is configured as a positioning unit for receiving radio waves from positioning satellites to measure the position of the combine 1. The antenna unit 60 includes a receiving device 61 as a receiving unit, an inertial navigation device 62 as a calculation unit, a wireless communication device 63 as a communication unit, and a case 64 for housing these devices. The antenna unit 60 constitutes an automatic steering system for the combine 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 device 62. The receiving device 61 is, for example, a GNSS receiver (GNSS antenna) that receives radio waves from a GNSS satellite group, a GPS (Global Positioning System) receiver (GPS antenna) that receives radio waves from GPS satellites, and the like.

[0057] The inertial navigation device 62 measures three-axis gyroscopes and accelerations in three directions, and calculates attitude and azimuth data. Further, the inertial navigation device 62 calculates position data based on the signals transmitted from the receiving device 61. The inertial navigation device 62 functions as a calculation device that calculates position data based on the position information from the receiving device 61. For example, by mounting a GNSS receiver on the inertial navigation device 62, the reliability of the attitude and azimuth data calculated by the inertial navigation device 62 is improved.

[0058] By including the inertial navigation device 62, the antenna unit 60 can utilize inertial navigation to calculate and position the moving speed, moving distance, etc. based on the accelerations in three directions detected by the inertial navigation device 62 even in a situation where radio waves from positioning satellites cannot be received due to bad weather, radio wave interference, etc.

[0059] The wireless communication device 63 transmits the position data and the attitude and azimuth data calculated by the inertial navigation device 62 to the outside by 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 possessed by an operator or an ECU (Electronic Control Unit) of the combine 1, and is used for position confirmation in the field and confirmation of the attitude of the combine 1 (such as inclination in the front-rear, left-right directions).

[0060] The case 64 has a lower case body 65 forming the lower part of the case 64 and an upper case body 66 forming the upper part of the case 64. These case bodies form a housing space and form the outer shape of the antenna unit 60. The case 64 has a relatively flat box-shaped outer shape with the longitudinal direction being the front-rear direction by the lower case body 65 and the upper case body 66. The lower case body 65 and the upper case body 66 are, for example, resin-made members.

[0061] The lower case body 65 is a box-shaped member with an open upper side, and has a horizontal bottom surface portion 65a and a peripheral wall portion 65b including side surface portions on the front, rear, left, and right and forming a rectangular opening by the upper edge portion. The upper case body 66 is a lid-shaped portion that covers the opening of the lower case body 65 from above. The upper case body 66 forms a rectangular edge by the front, rear, left, and right surface portions, and is provided in a state where this edge is fitted into the rectangular opening of the lower case body 65. The upper case body 66 is fitted to the lower case body 65 in a state where the lower opening edge portion is overlapped with the upper opening edge portion of the lower case body 65 from the outside, and the two case bodies are fixed to each other at a plurality of locations by a fixture 67 such as a bolt passing through their fitting portions.

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

[0063] As described above, the antenna unit 60 is configured as an integrated unit that houses the receiving device 61, the inertial navigation device 62, and the wireless communication device 63 within the case 64. Thereby, for the antenna unit 60, good mountability to the aircraft body and high versatility for a plurality of aircraft models can be obtained.

[0064] Also, regarding the arrangement configuration of the antenna unit 60, by positioning the antenna unit 60 at the left-right center portion of the aircraft body, the error when acquiring the position information and the attitude azimuth information of the combine 1 can be reduced, and good positioning accuracy can be obtained. Further, since the antenna unit 60 is provided at substantially the same height position as the roof portion 35 of the cabin 30 which is at a high position in the combine 1, good positioning accuracy can be obtained.

[0065] The positioning data (position data and attitude azimuth data) acquired by the antenna unit 60 is used for the control of the autonomous combine 1 that performs work while autonomously traveling on a preset path. The position data is used, for example, to determine whether the combine 1 is traveling along a predetermined path. Also, the attitude azimuth data is used, for example, to recognize the inclination of the combine 1 and thereby check the traveling state of the combine 1 and the state of the farm field. Further, by the operator receiving the transmission data from the wireless communication device 63, a real-time instruction can be sent to the combine 1.

[0066] Note that the configuration of the antenna unit 60 is not limited to this embodiment. As the configuration of the antenna unit 60, for example, the inertial navigation device 62 may be omitted by giving the receiving device 61 a function as an arithmetic 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 FIGS. 4 to 13. In FIGS. 7, 8, and 10, a part of the roof panel 50 is shown in a cutout state. Further, in FIG. 10, a part is shown in cross section.

[0068] The combine 1 includes a support frame 70 as a support member for supporting the antenna unit 60. The support frame 70 is a frame portion composed of a round pipe-shaped member having a predetermined bent shape 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-rear direction. Most of the support frame 70 except for both front and rear ends is a frame main body portion extending substantially in the front-rear direction. The support frame 70 has, as a portion forming a bent shape by a pipe-shaped member, in order from the front side to the rear side, a front fixing portion 71, a front-rear extending portion 72, an inclined portion 73, and a rear fixing portion 74.

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

[0071] The front-rear extending portion 72 is a portion having the front-rear direction as the axial direction, and is a portion extending horizontally rearward from the left end portion 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 a curved portion.

[0072] The inclined portion 73 is a portion having the axial direction of the inclined direction rising rearward in side view and the inclined direction gradually going from the left outer side (left side) to the right inner side (right side) from the front side to the rear side in plan view. The inclined portion 73 is a portion extending obliquely rearward and upward to the right from the rear end portion of the front-rear extending portion 72 so as to form an obtuse-angled corner together with the front-rear extending portion 72 in side view and plan view.

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

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

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

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

[0077] The front end portion of the support frame 70 is located in the vicinity of the upper end portion of the front upper surface portion 31a constituting the front surface portion 31 on the left side surface of the cabin 37. The front end portion of the support frame 70 is fixed to the front upper side plate 57 constituting the front upper portion of the left side surface of the cabin 37 via the front mounting plate 76.

[0078] The front mounting plate 76 is a plate-shaped member having a substantially rectangular outer shape. With the plate thickness direction being the left-right direction and the longitudinal direction being the up-down direction, it is fixed to the front upper plate 57. The front mounting plate 76 is fixed to the mounting seat 77 fixed to the front upper plate 57 by a fixing bolt 78. That is, the front mounting plate 76 is fixed to the front upper plate 57 via the mounting seat 77.

[0079] The mounting seat 77 has an upper surface portion, a lower surface portion, and a left side surface portion that are parallel to each other, and is a metal fitting having a substantially "U" shape with the right side (the front upper plate 57 side) being the open side in a front view (see Fig. 8), and is fixed to the front upper plate 57 by welding or the like. The mounting seat 77 has substantially the same dimensions as the front mounting plate 76 in the front-rear direction. In the mounting seat 77, the left side surface portion serves as the surface portion for receiving the mounting of the front mounting plate 76.

[0080] The front mounting plate 76 is fixed to the mounting seat 77 at two locations in the front and rear by the fixing bolt 78. The fixing bolt 78 passes through the left side surface portions of the front mounting plate 76 and the mounting seat 77 and is screwed into a nut portion 79 provided on the back side (right side) of the left side surface portion. The fixing portion by the fixing bolt 78 is located near the front and rear corner portions at 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 bolt 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 left and right outer sides (left side) with respect to the front upper corner portion of the left front window portion 47. The right end portion of the front fixing portion 71 of the support frame 70 is fixed to the lower part of the front mounting plate 76. The right end portion of the front fixing portion 71 is fixed to the front mounting plate 76 by welding or the like in a state of being fitted into a circular opening 76a formed in the lower part of the front mounting plate 76.

[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 substantially the same dimensions as the front mounting plate 76 in the vertical direction, and is provided on the rear side of the front fixing portion 71 with the front-rear direction being the plate thickness direction.

[0083] The reinforcing plate 80 is provided so as to protrude leftward perpendicularly to the front mounting plate 76 at a position in the middle portion of the front mounting plate 76 in the front-rear direction. 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 portion of the front fixing portion 71 by welding or the like. The reinforcing plate 80 has a bulging shape in which the dimension in the left-right direction is made longer than that of other portions for the fixed portion with respect to the front fixing portion 71.

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

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

[0086] The rear mounting plate 81 is a plate-shaped member having an outer shape of a substantially frustum of an isosceles triangle, with the plate thickness direction being the left-right direction and the top side being the lower side, and is fixed to the left side plate 44. The rear mounting plate 81 is fixed to the left side plate 44 by a fixing bolt 82.

[0087] The rear mounting plate 81 is fixed to the left side plate 44 at two locations, front and rear, by the fixing bolts 82. The fixing bolts 82 penetrate the left side plate 44 and are screwed into a female screw portion (not shown) provided on the back side (right side) of the left side plate 44. The fixing portions by the fixing bolts 82 are located near the front and rear corner portions at the upper part of the rear mounting plate 81.

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

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

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

[0091] The support bracket 90 is fixed to the mounting bracket 91 fixed to the support frame 70. That is, 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 symmetric or substantially symmetric about the axial center position of the front and rear extending portion 72 of the support frame 70. Also, the sets of the front and rear support brackets 90 and the mounting brackets 91 are configured to be symmetric or substantially symmetric in the front and rear directions.

[0092] The mounting bracket 91 is a longitudinal member in a form in which a plate-like member is bent, and is provided above the front and rear extending portion 72 so that the longitudinal direction is the left-right direction and is orthogonal to the axial direction of the front and rear extending portion 72 in 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 forms a substantially "U" shape with the lower side open in side view by these surface portions.

[0093] Semicircular cutouts 91d for fitting the front and rear extending portion 72 are formed below the left and right central portions of the front surface portion 91a and the rear surface portion 91b of the mounting bracket 91. The mounting bracket 91 is fixed to the front and rear extending portion 72 by welding or the like in a state where the front and rear extending portion 72 is fitted into the cutouts 91d of the front surface portion 91a and the rear surface portion 91b. The mounting bracket 91 has a length in the longitudinal direction that is shorter than the dimension in the width direction (left-right direction) of the case 64 of the antenna unit 60 and longer than half of the dimension.

[0094] The support bracket 90 is a longitudinal member in a form in which a plate-like member is bent, and is provided above the front and rear extending portion 72 so that the longitudinal direction is the left-right direction and is orthogonal to the axial direction of the front and rear extending portion 72 in plan view. The support bracket 90 has substantially the same length as the mounting bracket 91.

[0095] The support bracket 90 has a fixed surface portion 90a with the front-back direction being the plate thickness direction, a horizontal support surface portion 90b bent at a right angle from the upper end of the fixed surface portion 90a, and left and right side surface portions 90c bent at a right angle from both the left and right ends of the fixed surface portion 90a. In the support bracket 90, the support surface portion 90b serves as a surface for receiving 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 attachment bracket 91 with the fixed surface portion 90a facing the rear side, and in a state where the fixed surface portion 90a is overlapped with the front surface portion 91a of the attachment bracket 91, it is fixed to the attachment bracket 91 at two locations on both the left and right ends by fixing bolts 92. The fixing bolts 92 penetrate through the fixed surface portion 90a and the front surface portion 91a, and are screwed into nut portions 93 provided on the rear side of the front surface portion 91a of the attachment bracket 91.

[0097] The rear support bracket 90 is positioned behind the attachment bracket 91 with the fixed surface portion 90a facing the front side, and in a state where the fixed surface portion 90a is overlapped with the rear surface portion 91b of the attachment bracket 91, it is fixed to the attachment bracket 91 at two locations on both the left and right ends by fixing bolts 94. The fixing bolts 94 penetrate through the fixed surface portion 90a and the rear surface portion 91b, and are screwed into nut portions 95 provided on the front side of the rear surface portion 91b of the attachment bracket 91.

[0098] On the lower side of the left and right central portions of the fixed surface portion 90a of the support bracket 90, a semi-circular notch portion 90d for fitting the front and rear extending portion 72 is formed. The support bracket 90 has an inverted V-shaped concave shape with the notch portion 90d positioned at the central portion in the lower left and right intermediate portions. By fitting the front and rear extending portion 72 into the notch portion 90d, the lower edge portions on both the left and right sides are positioned below the front and rear extending portion 72.

[0099] With respect to such front and rear support brackets 90, the case 64 of the antenna unit 60 is fixed to the support surface portion 90b by fixing bolts 96. The fixing portions by 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 at 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 by the fixing bolts 96 at a total of four locations, two locations each with respect to the front and rear support brackets 90.

[0100] In the antenna unit 60, female screw portions 97 for receiving the screwing of the fixing bolts 96 are provided inside the case 64. The female screw portions 97 are constituted by cylindrical members having screw holes, and are fixedly provided to the case 64 so as to open the screw holes facing the bottom surface portion 65a of the lower case body 65 of the case 64. The female screw portions 97 are provided at four locations corresponding to the fixing portions by the fixing bolts 96. In such a configuration, the fixing bolts 96 penetrate the support surface portion 90b of the support bracket 90 from below, are screwed into the female screw portions 97, and fix the case 64 to the support bracket 90.

[0101] The antenna unit 60 is provided in a state of being supported above the substantially front half portion of the support frame 70. Specifically, the antenna unit 60 is provided with respect to the support frame 70 at a position where, in a plan view, the left and right centers of the outer shape of the case 64 coincide or substantially coincide with the axial center position of the front and rear extension portion 72. Also, with respect to the front - rear direction, the antenna unit 60 positions the front end portion of the case 64 in front of the front fixing portion 71, and positions the rear end portion of the case 64 in front of the bent portion formed by the front and rear extension portion 72 and the inclined portion 73.

[0102] As described above, with respect to the configuration in which the antenna unit 60 is supported by the support frame 70 at the upper left part of the cabin 30, a handrail portion 100 is provided. That is, the combine 1 includes a handrail portion 100 that is used for performing work on the antenna unit 60. The handrail portion 100 is formed of a round pipe-shaped member having a predetermined bent shape or curved shape, and is provided on the left side surface portion 37 of the cabin 30 of the cabin 30.

[0103] The handrail portion 100 is configured to extend vertically. Most of the handrail portion 100 except for the upper and lower end portions is a handrail main body portion that extends in the vertical direction in a side view. The handrail portion 100 has, as a portion forming a bent shape by a pipe-shaped member, a lower fixing portion 101, an inclined extension portion 102, and an upper fixing portion 103 in order from the lower side to the upper side.

[0104] The lower fixing portion 101 is a portion having the left-right direction as the axial direction, and is a portion extending leftward from the left side surface portion 37 of the cabin. The right end portion of the lower fixing portion 101 is the lower end portion of the handrail portion 100.

[0105] The inclined extension portion 102 is a portion having the direction along the vertical direction in a side view and the inclined direction gradually going from the left and right inner side (right side) to the left and right outer side (left side) from the lower side to the upper side in a front view as the axial direction. The inclined extension portion 102 is a portion extending obliquely upward to the left so as to form an obtuse-angled corner portion together with the lower fixing portion 101 in a front view. In a front view, the angle formed by the axial direction of the inclined extension portion 102 with respect to the vertical direction is, for example, about 5 to 10°. The corner portion between the inclined extension portion 102 and the lower fixing portion 101 is a curved portion 104.

[0106] The upper fixing portion 103 is a portion having the vertical direction as the axial direction, and is a portion extending upward from the upper end portion of the inclined extension portion 102 so as to form an obtuse-angled corner portion together with the inclined extension portion 102. The upper end portion of the upper fixing portion 103 is the upper end portion of the handrail portion 100.

[0107] In the handrail portion 100, an inclined extension portion 102 and an upper fixing portion 103 form a handrail main body portion that extends in the vertical direction in a side view. The inclined extension portion 102, which forms most of this handrail main body portion, is the portion mainly gripped by the operator in the handrail portion 100. The handrail portion 100 is provided so as to overlap the upper part of the left support column portion 42 that constitutes the left side surface portion 37 of the cabin in a left side view. The handrail portion 100 is provided over a range of more than half of the left side surface portion 37 of the cabin in the vertical direction. Specifically, the upper end portion of the handrail portion 100 is positioned at substantially the same height as the upper end of the front upper surface portion 31a of the cabin 30, and the lower end portion is positioned at a height lower than the lower end of the front upper surface portion 31a.

[0108] The handrail portion 100 is provided in a state where the upper end portion is connected to the support frame 70 and the lower end portion is fixed to the left side surface portion 37 of the cabin. That is, the handrail portion 100 is provided in a state where the upper end portion of the upper fixing portion 103, which is the upper end portion, is connected and supported by the support frame 70, and the right end portion of the lower fixing portion 101, which is the lower end portion, is fixed to the left side surface portion 37 of the cabin.

[0109] The upper end portion of the handrail portion 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 below the support frame 70 with respect to a portion between the rear support bracket 90 and the corner portion formed by the front-rear extension portion 72 and the inclined portion 73 in the support frame 70.

[0110] The upper support bracket 110 is a member in a form where a plate-shaped member is bent into a predetermined shape. The upper support bracket 110 has a substantially rectangular fixing surface portion 110a with the left-right direction as the plate thickness direction, and front and rear side surface portions 110b that are bent at right angles inward (right side) from the front and rear ends of the fixing surface portion 110a. These surface portions form a substantially "U" shape with the right side as the open side in a top view. In the upper support bracket 110, the fixing surface portion 110a is the surface portion that receives the attachment of the upper end portion of the handrail portion 100.

[0111] On the upper left side of the upper portion of the side faces 110b before and after the upper support bracket 110, a concave notch 110c for fitting the front and rear extension portions 72 of the support frame 70 is formed. The upper support bracket 110 is fixed to the front and rear extension portions 72 by welding or the like with the front and rear extension portions 72 positioned within the notches 110c of the front and rear side faces 110b. The upper support bracket 110 positions the upper edge portion of the fixed face portion 110a to the left of the front and rear extension portions 72.

[0112] The handrail portion 100 fixes the upper end portion of the upper fixing portion 103 to the upper support bracket 110 via the fixing plate 115. The fixing plate 115 is a plate-like member having an outer shape of a substantially frustum-shaped isosceles triangle, is provided with the plate thickness direction as the left-right direction, and with the top side facing downward. The fixing plate 115 is fixed to the left side of the upper end portion of the upper fixing portion 103 by welding or the like.

[0113] The fixing plate 115 is fixed to the fixing face portion 110a of the upper support bracket 110 at two locations in the front and rear by the fixing bolts 116 in a state of overlapping from the back side (right side). The fixing bolts 116 penetrate through the fixing face portion 110a and the fixing plate 115 and are screwed into the nut portions 117 provided on the back side (right side) of the fixing plate 115. The fixing portions by the fixing bolts 116 are located near the front and rear corner portions of the upper portion of the fixing plate 115.

[0114] The handrail portion 100, as well as the upper support bracket 110 and the fixing plate 115 for connecting the upper end portion of the handrail portion 100 to the support frame 70, are configured to be symmetric or substantially symmetric about the axial center position of the handrail portion 100 along the vertical direction in a left side view. Also, in a left side view, the handrail portion 100 is positioned entirely within the width (dimension in the front-rear direction) of the left support column portion 42 that constitutes the left side face portion 37 of the cabin.

[0115] The lower end of the drawer part 100 is fixed to the left support part 42 that constitutes the left side face 37 of the cabin via a lower support bracket 120 which is an attachment member. As shown in Fig. 12, the lower support bracket 120 is a mounting bracket having a substantially "L" - shaped bent configuration. The lower support bracket 120 has a fixed face 121 and a support face 122 as faces forming the bent configuration.

[0116] With the vertical direction as the longitudinal direction, the lower support bracket 120 is fixed to the left support part 42 at two positions above and below by fixing bolts 124 with the fixed face 121 along the left side face 42a of the left support part 42. The fixing bolts 124 penetrate the left face part of the left support part 42 that forms the fixed face 121 and the left side face 42a, and are screwed into a nut part (not shown) provided on the back side of this left face part. The support face 122 protrudes from the front side of the fixed face 121 toward the left, with the front - rear direction being the plate - thickness direction.

[0117] In the lower support bracket 120, a through - shaped opening 123 is formed at the central part in the vertical direction. The opening 123 is formed in a manner of notching the corner part formed by the fixed face 121 and the support face 122. Regarding the forming part on the fixed face 121, the opening 123 has a part that follows a circular shape corresponding to the outer shape of the lower fixing part 101 in a left - side view which is the axial - direction view of the lower fixing part 101 of the drawer part 100. On the fixed face 121, fixing parts by the fixing bolts 124 are provided on both the upper and lower sides of the opening 123.

[0118] For the lower support bracket 120 as described above, the drawer part 100 is fixed to the lower support bracket 120 by welding or the like with the tip of the lower fixing part 101 fitted into the opening 123 in the fixed face 121 and with a part of the lower fixing part 101 and the curved part 104 positioned on the rear - face 122a side of the support face 122. The welding parts of the drawer part 100 to the lower support bracket 120 are, for example, the fitting part of the lower fixing part 101 to the opening 123 and the contact parts of the lower fixing part 101 and the curved part 104 to the rear - face 122a of the support face 122.

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

[0120] In the configuration in which the handrail portion 100 is provided with respect to the support frame 70 of the antenna unit 60 as described above, the antenna unit 60 and the handrail portion 100 are arranged so as to be located in front and rear of each other in plan view.

[0121] As shown in FIG. 6, in the present embodiment, the handrail portion 100 is located behind the antenna unit 60 in the front-rear direction, and the antenna unit 60 and the handrail portion 100 are arranged side by side in the front-rear direction. Specifically, the handrail portion 100, which extends along the left-right direction in plan view, is located in the vicinity behind the rear end of the case 64 with respect to the antenna unit 60.

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

[0123] Further, the handrail portion 100 is composed of metal parts. Specifically, the handrail portion 100 is composed of a steel pipe having a circular cross-sectional shape. And the upper end of the handrail portion 100 is provided so as to be positioned at a height lower than that of the antenna unit 60.

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

[0125] Thus, the upper end of the handrail portion 100 is located below the bottom surface portion 65a which becomes the lower surface portion of the antenna unit 60. Note that the upper end of the handrail portion 100 is the horizontal opening end face of the steel pipe constituting the handrail portion 100.

[0126] As shown in Fig. 13, the cabin 30 is provided so as to be rotatable about the opening and closing axis A1 which is an axis in the vertical direction with respect to the traveling body 4 so as to open to the outside in the left-right direction of the body of the combine 1. In the example shown in Fig. 13, the opening and closing axis A1 is provided at a position slightly to the left of the rear portion of the cabin 30 in plan view.

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

[0128] The rotation support portion of the cabin 30 about the opening and closing axis A1 includes, for example, a support column portion erected on the traveling body 4 and a cylindrical shaft support portion provided on the cabin 30 side and rotatably connected to the support column portion. The cabin 30 is fixed to the traveling body 4 side by a lock mechanism (not shown) in each of 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 its vicinity.

[0129] When the cabin 30 is in the open state, the grain tank 7 rotates outward (side-open state) around the axis of the vertical extraction conveyor 9b (see FIG. 1) of the discharge auger 9 from the normal storage position so that the front side opens to the outside of the machine body. As a result, the arrangement space for the open cabin 30 is secured, and the cabin 30 is prevented from interfering with the grain tank 7. By rotating the grain tank 7 to open it outward (to the right side) of the machine body, the right side of the threshing unit 6, the installation space of the engine 11, etc. are opened. Note that a locking device (not shown) for fixing the grain tank 7 to the storage position is provided for the grain tank 7.

[0130] In the cabin 30 provided to rotate outward in the width direction (left-right direction) of the machine body in this way, the left side face 37 of the cabin, which is the installation surface portion of the antenna unit 60, the support frame 70, and the handrail portion 100, is the side face located on the inner side in the left-right direction of the machine body among the left and right side faces of the cabin 30. That is, the antenna unit 60, the support frame 70, and the handrail portion 100 are provided with respect to the left side face 37 of the cabin, which is the side face on the side opposite to the side where the cabin 30 opens, among the left and right side faces of the cabin 30.

[0131] Therefore, when the cabin 30 rotates to the right around the opening / closing axis A1 and becomes the open state (see FIG. 13, arrow B1), the left side face 37 of the cabin will face substantially forward or forward. That is, for the cabin 30 rotated to the right, the antenna unit 60, the support frame 70, and the handrail portion 100 are located on the front side, and are in an open state on the right side of the machine body.

[0132] Further, the combine 1 includes an auxiliary antenna 130 as an antenna for acquiring auxiliary information for the antenna unit 60 (see FIG. 7). The auxiliary antenna 130 is an antenna for acquiring GPS correction information in the automatic steering system of the combine 1 by the antenna unit 60. The auxiliary antenna 130 is a linear 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 such as a communication carrier, or a fixed base station installed by a local government or the like. The antenna unit 60 corrects the position information from the positioning satellite received by the receiving device 61 with correction information received by the auxiliary antenna 130 by means of an inertial navigation device 62 or the like, and outputs (transmits) the position information of the own aircraft by means of a wireless communication device 63 or the like.

[0134] The auxiliary antenna 130 is provided at the connecting portion of the handrail portion 100 to the support frame 70. Specifically, an antenna support surface portion 110d is provided as a portion for supporting the auxiliary antenna 130 on an upper support bracket 110 as a connecting member constituting the connecting portion of the handrail portion 100 to the support frame 70.

[0135] The antenna support surface portion 110d is a horizontal plate-like portion formed by bending at a right angle from the upper end portion of the fixed surface portion 110a toward the left in the upper support bracket 110. A notch-shaped support recess 110e is formed at the front-rear center portion of the left end portion of the antenna support surface portion 110d. The support recess 110e is a concave portion with the left side as the open side, and is formed to penetrate in the plate thickness direction of the antenna support surface portion 110d.

[0136] The antenna support surface portion 110d serves as a mounting seat for the auxiliary antenna 130, and the auxiliary antenna 130 is supported in an upright state with respect to the portion of the support recess 110e. As a fixing structure of the auxiliary antenna 130 to the antenna support surface portion 110d, for example, as shown in FIG. 7, a diametrically enlarged flange portion 131 is formed at the lower end portion of the auxiliary antenna 130, and a male screw portion is formed at the lower portion thereof, and the antenna support surface portion 110d is clamped and fixed up and down by the flange portion 131 and a nut 132 screwed to the male screw portion. 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 upper and lower intermediate portion 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. Note that the shape of the auxiliary antenna 130 and the configuration for fixing the auxiliary antenna 130 to the antenna support surface portion 110d are not particularly limited. Further, the antenna supported by the upper support bracket 110 is not limited to the auxiliary antenna 130, and the function, shape, etc. are not limited as long as it is an antenna for acquiring information regarding the antenna unit 60.

[0138] According to the combine 1 according to the present embodiment having the above-described configuration, in the configuration in which the antenna unit 60 is provided at the height position above the cabin 30, the safety of the work on the antenna unit 60 can be improved.

[0139] The combine 1 includes a handrail portion 100 on the left side surface portion 37 of the cabin. According to such a configuration, when performing position adjustment such as removal and height adjustment of the antenna unit 60 located at a high position from the ground, or maintenance, etc., in the work on the antenna unit 60 performed with the operator on a platform or a stepladder, etc., the operator can stabilize the body by gripping the handrail portion 100. Thereby, the safety of the work can be improved. Note that when working on the antenna unit 60, the space on the left front side of the cabin 30 is opened by side-opening the cutting unit 5, and such a space is used as an installation space for a platform or a stepladder, etc. and a work space for the operator.

[0140] Further, regarding the form of the handrail portion 100, the handrail portion 100 has a shape that is inclined in a direction approaching the left side surface portion 37 of the cabin from the upper side to the lower side in the inclined extension portion 102 that forms most of it. According to such a configuration, for example, compared with a configuration in which the handrail portion 100 extends the handrail main body portion vertically as a whole, good grip performance can be obtained, and contact between the handrail portion 100 and the rear portion of the cutting unit 5 can be avoided, thereby achieving compactification of the machine body.

[0141] In the combine harvester 1, the antenna unit 60 and the handrail 100 are arranged side by side in the front-rear direction. According to such a configuration, since the arrangement spaces of the antenna unit 60 and the handrail 100 are separated front and rear, good gripability with respect to the handrail 100 can be obtained. As a result, the usability of the handrail 100 is improved, and the work safety with respect to the antenna unit 60 in a state of being mounted on a platform, a stepladder, or the like can be effectively improved.

[0142] In the present embodiment, the handrail 100 is provided on the rear side of the antenna unit 60, but their front-rear relationship may be reversed. That is, in the front-rear direction, a configuration in which the handrail 100 is arranged on the front side of the antenna unit 60 may be employed.

[0143] In the combine harvester 1, the support frame 70 that supports the antenna unit 60 is provided in a manner extending in the front-rear direction, and the front end portion and the rear end portion are fixed to the left side surface portion 37 of the cabin. The handrail 100 is provided in a manner extending in the vertical direction, and the upper end portion is connected to the support frame 70 and the lower end portion is fixed to the left side surface portion 37 of the cabin. According to such a configuration, the antenna unit 60 can be firmly supported with respect to the cabin 30.

[0144] Specifically, as shown in FIG. 4, the support frame 70 that supports the antenna unit 60 is fixedly supported at two locations, front and rear, with respect to the left side surface portion 37 of the cabin by a first fixing portion on the upper front side by the front mounting plate 76 and a second fixing portion on the upper rear side by the rear mounting plate 81. The lower end portion of the handrail 100 having the upper end portion connected to the front-rear intermediate portion of the support frame 70 is fixedly supported with respect to the left side surface portion 37 of the cabin by a third fixing portion by the lower support bracket 120.

[0145] Thus, as a support structure of the antenna unit 60 for the left side surface portion 37 of the cabin, a frame structure is configured in which a support frame 70 supported front and rear by a first fixing portion and a second fixing portion is supported from below by a handrail portion 100 whose one end side is supported by a third fixing portion. According to such a frame structure, with respect to the left side surface portion 37 of the cabin, the antenna unit 60 can be supported firmly and in good balance at three fixing portions located at the vertices of a substantially inverted isosceles triangle in a left side view, that is, at three points of the first fixing portion, the second fixing portion, and the third fixing portion, and sufficient support strength can be obtained.

[0146] Further, regarding the form of the support frame 70, the support frame 70 has an inclined portion 73 that is inclined in a direction approaching the left side surface portion 37 of the cabin from the front side to the rear side in a plan view at the rear portion. According to such a configuration, it is possible to avoid the support frame 70 coming into contact with the discharge auger 9 located in the vicinity of the left side of the support frame 70 in the stored state. In a plan view, the extending direction of the inclined portion 73 is substantially parallel to the extending direction of the discharge auger 9 in the stored state.

[0147] Also, in the combine 1, the cabin 30 is provided so as to rotate to the right and open with respect to the traveling body 4, and the antenna unit 60 and the handrail portion 100 are provided on the left side surface portion 37 of the cabin on the side opposite to the side where the cabin 30 opens. According to such a configuration, when the cabin 30 is in an open state, the left side surface portion 37 of the cabin faces the front side, and the front sides of the antenna unit 60 and the handrail portion 100 become an open space. Thereby, good workability can be obtained for the work on the antenna unit 60 in a state of being on a stand or a stepladder, etc., and the workability can be improved.

[0148] In the combine harvester 1, the handrail portion 100 is composed of metal parts, and the upper end of the handrail portion 100 is located below the antenna unit 60. With such a configuration, it is possible to easily ensure the strength of the handrail portion 100 and obtain good workability in the manufacture of the handrail portion 100. In addition, it is possible to suppress the handrail portion 100 from interfering with the radio wave reception by the antenna unit 60, and good sensitivity can be obtained for the radio wave reception in the antenna unit 60. Thereby, the positioning accuracy of the combine harvester 1 by the antenna unit 60 can be ensured.

[0149] The combine harvester 1 is also provided with an auxiliary antenna 130, and the support portion of the auxiliary antenna 130 is provided on the upper support bracket 110 that constitutes the connecting portion on the upper end side of the handrail portion 100 with respect to the support frame 70. With such a configuration, compared with the case where the auxiliary antenna 130 is provided in the cab 30 in the operation unit 12, the auxiliary antenna 130 can be installed outside the cab 30, so that good communication sensitivity can be obtained.

[0150] In addition, since the auxiliary antenna 130 can be provided by using the connection structure of the handrail portion 100, the auxiliary antenna 130 can be installed with a simple configuration without separately providing a configuration for supporting the auxiliary antenna 130. Further, the connecting portion of the handrail portion 100 with respect to the support frame 70 is a portion that is less affected by the vibration of the machine body compared to other portions of the support frame 70, for example, so that the auxiliary antenna 130 can be provided at a position advantageous for the sway of the auxiliary antenna 130. As described above, according to the configuration in which the auxiliary antenna 130 is erected at the connecting portion of the handrail portion 100 with respect to the support frame 70, the positioning accuracy of the combine harvester 1 by the antenna unit 60 can be ensured with a simple configuration.

[0151] [Configuration of Antenna Unit] The configuration of the antenna unit 60 will be described with reference to FIGS. 14 to 18. Note that FIGS. 14 and 16 show the state in which the upper case body 66 is removed.

[0152] As shown in FIGS. 14 and 15, the antenna unit 60 has a wireless communication device 63, a receiving device 61, and an inertial navigation device 62 provided from the front side to the rear side. These devices are provided in a state of being fixed to a horizontal plate-shaped device mounting plate 68 provided parallel to the bottom surface portion 65a within the case 64.

[0153] The device mounting plate 68 is provided so as to cover substantially the entire bottom surface portion 65a from above inside the case 64, and has a substantially rectangular outer shape with the longitudinal direction in the front-rear direction corresponding to the shape of the bottom surface portion 65a. The device mounting plate 68 has a horizontal mounting surface 68a on its upper surface for receiving the mounting of each device. The four corner portions of the device mounting plate 68 are chamfered inclined side portions. Further, on both long side portions in the short side direction (left-right direction) of the device mounting plate 68, reinforcing bent surface portions 68b bent at a right angle downward with respect to the horizontal main body portion of the device mounting plate 68 are formed (see FIG. 15). The device mounting plate 68 is a member made of metal such as a steel plate, and is fixed to the bottom surface portion 65a of the lower case body 65 by a fixing tool such as a bolt (not shown).

[0154] The wireless communication device 63 is provided on the front end portion of the device mounting plate 68. The wireless communication device 63 has a main body portion 63a having a substantially rectangular parallelepiped outer shape, and two front and rear antenna portions 63b erected on the left side surface portion of the main body portion 63a. The wireless communication device 63 has fixing piece portions 63c for fixing the wireless communication device 63 to the device mounting plate 68 on both front and rear sides of the main body portion 63a. The fixing piece portion 63c is a plate-shaped portion protruding outward along the mounting surface 68a from the lower edge portion of the main body portion 63a.

[0155] The wireless communication device 63 is fixed to the device mounting plate 68 by bolts 151 that penetrate the fixing piece portion 63c and the device mounting plate 68 from above. The bolts 151 are screwed into nut portions 152 located below the device mounting plate 68. The fixing portions of the wireless communication device 63 by the fixing piece portions 63c are provided at a total of four locations, two locations on the left and right on both the front and rear sides of the main body portion 63a (see FIG. 14).

[0156] The inertial navigation device 62 is provided on the rear end portion of the device mounting plate 68. The inertial navigation device 62 has an outer shape that is substantially rectangular in plan view and has a substantially inverted trapezoidal shape that tapers downward at the lower part. The inertial navigation device 62 is fixed to the device mounting plate 68 by bolts 153 that penetrate the device mounting plate 68 from below in a state where it is placed on the device mounting plate 68. The bolts 153 are screwed into female screw portions 154 provided inside the inertial navigation device 62 and opening facing the bottom surface of the inertial navigation device 62. The fixing portions by the bolts 153 are provided at a total of four locations, two locations on each of the left and right sides on both the front and rear sides (see FIG. 14).

[0157] The receiving device 61 has a flat outer shape that is substantially round-cornered equilateral triangular in plan view. Regarding the plan view outer shape, one top side is on the right side, and it is provided in a direction with the side portion located on the left side along the front-rear direction. The receiving device 61 is provided at the middle portion between the front and rear of the device mounting plate 68 via an antenna support base 160 with respect to 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 of being fixed to the device mounting plate 68. The antenna support base 160 forms a support surface 160a that is located at a height spaced upward from the device mounting plate 68 as a surface for supporting the receiving device 61.

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

[0160] The antenna support base 160 has fixing piece portions 165a, 165b, 165c for fixing the antenna support base 160 to the device mounting plate 68 on both the front and rear sides. These fixing piece portions have a predetermined shape so as not to interfere with other devices or the like mounted on the device mounting plate 68. The front fixing piece portions 165a, 165b are plate-like portions protruding outward (front side) along the mounting surface 68a from the lower end portion of the front surface portion 162. The rear fixing piece portion 165c is a plate-like portion protruding outward (rear right side) along the mounting surface 68a from the lower end portion of the right rear side surface portion 164.

[0161] The antenna support base 160 is fixed to the device mounting plate 68 by bolts 167 passing through the device mounting plate 68 and each of the fixing piece portions 165a, 165b, 165c from below. The bolts 167 are screwed into nut portions 168 located above the device mounting plate 68. The fixing portions of the antenna support base 160 by the bolts 167 are provided at four locations in total, one location each in the front fixing piece portions 165a, 165b and two locations in the rear fixing piece portion 165c (see FIG. 16). Hole portions 166 for passing the bolts 167 are formed in each of the fixing piece portions 165a, 165b, 165c (see FIG. 17).

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

[0163] Thus, the antenna support base 160 that constitutes the pedestal of the receiving device 61 with respect to the device mounting plate 68 forms a space portion 170 between itself and the device mounting plate 68 (see Fig. 15). The space portion 170 is a space formed by the device mounting plate 68, the upper surface portion 161, the front surface portion 162, the right side surface portion 163, and the right rear side surface portion 164, with the left side being open.

[0164] For each of the devices of the receiving device 61, the inertial navigation device 62, and the wireless communication device 63 included in the antenna unit 60, a cable (not shown) including a power supply line, a signal line, etc. for receiving power supply is connected. In the wireless communication device 63, a connector 63d for receiving the connection of the cable is provided on the right side surface portion of the main body portion 63a. In the receiving device 61, a connector 61d for receiving the connection of the cable is provided on the rear side surface portion. In the inertial navigation device 62, a connector (not shown) for receiving the connection of the cable is provided on the right side surface portion.

[0165] Among the peripheral wall portions 65b of the lower case body 65, a cable insertion portion 69 that forms a guide hole portion for passing the cable is provided on the right side surface portion of the front part. As the wiring configuration of the cable in the antenna unit 60, for example, an aggregated cable 175 is formed by aggregating into one the branched cables connected to the connectors of each device within the case 64, and the aggregated cable 175 is extended to the outside of the case 64 through the cable insertion portion 69. The aggregated cable 175 extended from the case 64 to the outside is connected to a predetermined cable extended from the main machine side of the combine 1. Thus, in the antenna unit 60, the cable extends to the outside from the left and right inner sides of the case 64, that is, 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 the DC power and converts the DC power into DC power, and has functions for voltage conversion, stabilization, etc.

[0167] Converter 180 has a casing 181 with a substantially rectangular parallelepiped outer shape, and is installed on the device mounting plate 68 within the space 170 by the antenna support base 160. In a plan view, converter 180 is provided in a direction inclined approximately 30° with respect to the left-right direction so that the whole is accommodated in the space 170. Note that the installation direction of converter 180 is not particularly limited.

[0168] Converter 180 is fixed to the device mounting plate 68 by bolts 183 at plate-shaped fixing parts 182 formed in a notch shape at a pair of corner parts located diagonally in a plan view in the casing 181. The bolts 183 penetrate through the fixing parts 182 and the device mounting plate 68, and are screwed into nut parts 184 located below the device mounting plate 68.

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

[0170] Converter 180 has a first terminal which is a terminal of the input power source connected to the power source unit 190, and a second terminal which is a terminal of the output power source that receives the connection of the other end side of a first connection wire 191 whose one end side is connected to the receiving device 61. Further, converter 180 has a third terminal which is a terminal of the input GND that receives the connection of the other end side of a second connection wire 192 whose one end side is connected to the GND of the receiving device 61, and a fourth terminal which is a terminal of the output GND connected to the GND.

[0171] As shown in FIG. 16, converter 180 has a connector 185 including the first to fourth terminals. The connector 185 is provided on the right side surface part of the casing 181 of converter 180. A branch cable for converter 180 branched from the aggregated cable 175 is connected to the connector 185 within the case 64.

[0172] As described above, according to the configuration in which the antenna unit 60 is provided with the converter 180 for the receiving device 61, sufficient voltage can be obtained for the power supplied to the receiving device 61 and the voltage can be stabilized by the boosting action of the converter 180, etc., and a good operating state of the antenna unit 60 can be ensured.

[0173] For example, in a configuration in which the power supply to the receiving device 61 is performed by an auxiliary battery for supplying power to various electronic devices provided in the combine 1, it is difficult to obtain sufficient voltage for the power supplied to the receiving device 61. In particular, at the time of starting the engine, due to the voltage drop caused by cranking, resetting of the receiving device 61 (resetting of the antenna) may occur. In such a case, satellite positioning information and azimuth information are reset, and reconfiguration may be required to position the satellite.

[0174] Therefore, by providing the converter 180 having a boosting function, the voltage of the power supplied to the receiving device 61 can be boosted and the voltage for the receiving device 61 can be stabilized. As a result, problems such as the above-mentioned antenna reset can be suppressed, and a user-friendly antenna unit 60 can be realized.

[0175] Also, in the antenna unit 60, the converter 180 is provided in a space portion 170 formed below the receiving device 61 by the antenna support base 160 on the device mounting plate 68. According to such a configuration, the space in the case 64 can be effectively utilized and the connection lines such as cables connected to the receiving device 61 and the converter 180 can be shortened. Thereby, the antenna unit 60 can be made compact.

[0176] In addition, 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 device 62 and the wireless communication device 63. As a result, good sensitivity can be obtained for radio wave reception in the antenna unit 60, and the positioning accuracy of the combine 1 by the antenna unit 60 can be ensured.

[0177] [Other Embodiments] Other embodiments of the support configuration of the antenna unit 60 will be described with reference to FIGS. 19 to 21. Note that the same reference numerals are given to the configurations common to the above-described embodiments, and the description thereof will be omitted.

[0178] The configuration of this embodiment is different from the above-described embodiment in that the position of the antenna unit 60 can be changed. The antenna unit 60 according to this embodiment is provided so that its position can be changed to a first height position where the whole is located above the support frame 70 and a second height position where at least a part thereof overlaps with the support frame 70 with respect to the height position which is the vertical position.

[0179] As shown in FIGS. 19 to 21, in this embodiment, the antenna unit 60 is provided so as to be rotatable about a rotation axis O1 along the front-rear direction located on the lower right side of the antenna unit 60 as a central axis. That is, as shown in FIGS. 19 and 20, the antenna unit 60 has a horizontal state in which the bottom surface portion 65a is horizontal as a state at the first height position, and rotates in a direction of lowering the left side (the right side in FIG. 20) about the rotation axis O1, and a state in which the bottom surface portion 65a is in an inclined state with a left downward slope is set as a state at the second height position.

[0180] Hereinafter, for the antenna unit 60, the state at the first height position is defined as the normal state, and the state at the second height position is defined as the inclined state. Further, hereinafter, unless otherwise specified, the normal state of the antenna unit 60 is described.

[0181] The antenna unit 60 is supported in a fixed state on support brackets 200 provided at two positions, front and rear, in the front-rear extending portion 72 of the support frame 70. The front support bracket 200 is provided near the corner formed by the front fixing portion 71 and the front-rear extending portion 72 with respect to the support frame 70, and the rear support bracket 200 is provided at the middle portion between the front and rear of the front-rear extending portion 72.

[0182] The support bracket 200 is fixed to a mounting plate 210 fixed to the support frame 70. That is, the support bracket 200 is provided via the mounting plate 210 with respect to the support frame 70. The front and rear support brackets 200 are fixed to the integral mounting plate 210. That is, 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 symmetric or substantially symmetric in the front-rear direction in a left side view. In FIG. 19, the rear support bracket 200 is shown in cross section.

[0183] The mounting plate 210 is a longitudinal member in a form formed by bending a plate-like member, and is provided above the front-rear extending portion 72 with the longitudinal direction as the front-rear direction. The mounting plate 210 has a main body plate portion 211 which is a flat plate portion forming most of it, and mounting plate portions 212 provided at both ends in the longitudinal direction of the main body plate portion 211.

[0184] The main body plate portion 211 has a narrow-width portion 211a having a relatively narrow predetermined width at the middle portion in the longitudinal direction, and widened portions 211b having a wider width than the narrow-width portion 211a at both ends in the longitudinal direction (see FIG. 19). The front and rear widened portions 211b have portions that gradually widen from the narrow-width portion 211a side to the front and rear end sides and form hypotenuses on both sides in the width direction on the narrow-width portion 211a side. The dimension in the width direction of the widened portion 211b is, for example, about the same as the dimension in the longitudinal direction (left-right direction) of the mounting bracket 91 in the above-described embodiment.

[0185] The mounting plate portion 212 is a portion bent at a right angle downward from the front and rear ends of the main body plate portion 211. A semi-circular notch portion 212a for fitting the front and rear extending portion 72 is formed below the left and right central portions of the mounting plate portion 212.

[0186] The mounting plate 210 is fixed to the front and rear extending portion 72 by welding or the like in a state where the front and rear extending portion 72 is fitted into the notch portion 212a of the front and rear mounting plate portions 212. The mounting plate 210 is provided in an inclined manner so as to incline the main body plate portion 211 downward to the left. In the axial direction view of the rotation axis O1, the angle formed by the main body plate portion 211 with respect to the horizontal plane is, for example, about 20°.

[0187] The support bracket 200 is a longitudinal member in a form in which a plate-like member is bent, and is provided above the front and rear extending portion 72 so as to be orthogonal to the axial direction of the front and rear extending portion 72 of the support frame 70 in a plan view with the longitudinal direction being the left-right direction.

[0188] The support bracket 200 has a fixed surface portion 221 with the front-rear direction as the plate thickness direction, a horizontal support surface portion 222 bent at a right angle from the upper end of the fixed surface portion 221, and a side surface portion 223 bent at a right angle from the left end of the fixed surface portion 221. In the support bracket 200, the support surface portion 222 serves as a surface for receiving 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] The fixed surface portion 221 has a shape extending in the left-right direction in the axial direction view of the rotation axis O1, and has a protruding portion 221a protruding downward from the front and rear extending portion 72 in the left side portion, and has a substantially "L" shape as a whole. A concave notch portion 221b for fitting the front and rear extending portion 72 is formed below the left and right central portions of the fixed surface portion 221.

[0190] The front support bracket 200 is positioned in front of the front mounting plate portion 212 of the mounting plate 210 with the fixed surface portion 221 facing rearward. In a state where the fixed surface portion 221 is overlapped with the mounting plate portion 212, it is fixed to the mounting plate 210 at two locations on both the left and right sides by the first bolt 231 and the second bolt 232 as fixed supports. The first bolt 231 and the second bolt 232 penetrate through the fixed surface portion 221 and the mounting plate portion 212 and are screwed into the nut portion 235 provided on the rear side of the mounting plate portion 212. The fixing portion by the first bolt 231 is positioned to the right of the front-rear extending portion 72 of the support frame 70, and the fixing portion by the second bolt 232 is positioned 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 fixed surface portion 221 facing forward. In a state where the fixed surface portion 221 is overlapped with the mounting plate portion 212, it is fixed to the mounting plate 210 at two locations on both the left and right sides by the third bolt 233 and the fourth bolt 234 as fixed supports. The third bolt 233 and the fourth bolt 234 penetrate through the fixed surface portion 221 and the mounting plate portion 212 and are screwed into the nut portion 236 provided on the front side of the mounting plate portion 212. The fixing portion by the third bolt 233 is positioned to the right of the front-rear extending portion 72 of the support frame 70, and the fixing portion by the fourth bolt 234 is positioned to the left of the front-rear extending portion 72.

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

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

[0194] In the support configuration of the antenna unit 60 as described above, the antenna unit 60 is integrally provided with the front and rear support brackets 200 so as to be rotatable about a rotation axis O1 with respect 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 constituted by a fixing portion by the first bolt 231 in the front support bracket 200 and a fixing portion by the third bolt 233 in the rear support bracket 200. That is, the first bolt 231 and the third bolt 233 position the central axis on a common straight line along the front-rear direction, that is, on the rotation axis O1.

[0196] Also, in the front and rear support brackets 200, the second bolt 232 and the fourth bolt 234 position the central axis on a common straight line L1 along the front-rear direction. The second bolt 232 and the fourth bolt 234 respectively penetrate through a long hole 221c formed in the fixing surface portion 221 of the support bracket 200 with the substantially vertical direction as the longitudinal direction. The long hole 221c is formed in the left side portion of the fixing surface portion 221 in a range extending from the upper part to the protruding portion 221a. The long hole 221c has a curved shape along an arc centered on the position of the rotation axis O1 in a view from the axial direction 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 has a fixing portion by the first bolt 231 and the third bolt 233 as a fixed-side support portion, and a fixing portion by the second bolt 232 and the fourth bolt 234 as a movable-side support portion, and is provided so as to be rotatable around the rotation axis O1.

[0198] An example of the procedure for rotating the antenna unit 60 will be described. As shown in FIGS. 19 and 20, from the normal state of the antenna unit 60, the fastening of the first bolt 231, the second bolt 232, the third bolt 233, and the fourth bolt 234 is loosened. The front and rear support brackets 200 and the antenna unit 60 fixed thereto can be rotated around the rotation axis O1.

[0199] Thereafter, the antenna unit 60 and the front and rear support brackets 200 are rotated clockwise (rightward) in a front view until they are in an inclined state, that is, until they reach the second height position from the first height position (see arrow M1 in FIG. 21). Here, the long hole 221c in the front and rear support brackets 200 serves as a guide hole, and the second bolt 232 and the fourth bolt 234 move along the long hole 221c. After moving the antenna unit 60 and the front and rear support brackets 200 to the second height position, the four bolts 1 to 4 are tightened to fix the front and rear support brackets 200 to the mounting plate 210, respectively, so that the antenna unit 60 is in an inclined state.

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

[0201] In the normal state of the antenna unit 60, the second bolt 232 and the fourth bolt 234 are located at the lower end portion of the long hole 221c or in the vicinity thereof. In the inclined state of the antenna unit 60, the second bolt 232 and the fourth bolt 234 are located at the upper end portion of the long hole 221c or in the vicinity thereof. Further, the notch portion 221b of the support bracket 200 is formed so as not to interfere with the front and rear extending portions 72 of the support frame 70 within the rotation range of the antenna unit 60.

[0202] The antenna unit 60 is positioned on the support surface portion 222 of the support bracket 200, which is located at a height above the support frame 70 in the normal state, and the whole is positioned above the support frame 70.

[0203] On the other hand, in the inclined state, the antenna unit 60 has a part positioned within the height range where the support frame 70 is located. Specifically, as shown in FIG. 21, the height range where the support frame 70 is located is the height range ΔH from the height position H1 of the upper end of the rear fixing portion 74 to the height position H2 of the lower end of the front fixing portion 71, which is located below the rear fixing portion 74.

[0204] In contrast, in the inclined state, the antenna unit 60 positions the height position H3 of the lower end of the case 64, which is the lower end of the antenna unit 60, within the range of the height range ΔH. That is, 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 in the inclined state, most of the upper side of the antenna unit 60 is positioned above the support frame 70, that is, above the height position H1.

[0205] According to the support configuration of the antenna unit 60 according to the present embodiment, by inclining the antenna unit 60, the antenna unit 60 can be positioned at a lower position than in the normal state. Thereby, regarding operations such as position adjustment and maintenance such as removal and height adjustment of the antenna unit 60, which are performed by an operator in a state of standing on a platform or a step ladder, etc., the safety can be improved by the handrail portion 100, and the handling of the antenna unit 60 can be facilitated and the workability can be improved.

[0206] In addition, in the present embodiment, as a configuration for changing the height position of the antenna unit 60, a configuration in which the antenna unit 60 is rotated about the rotation axis O1 is adopted. However, the configuration for changing the height position of the antenna unit 60 is not limited to such a 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 translated while maintaining the horizontal state of the antenna unit 60.

[0207] Each of the above-described embodiments is an example of the present invention, and the present invention is not limited to the above-described embodiments. Therefore, it goes without saying that various changes can be made according to the design and the like as long as they are within the scope not departing from the technical idea of the present invention even if they are other than the above-described embodiments. In addition, the effects described in the present disclosure are merely examples and are not limited, and there may be other effects.

[0208] In the above-described embodiment, the support frame 70 as the support member is constituted by a pipe-shaped member. However, the support member is not limited to such a configuration. The support member according to the present invention may be constituted by, for example, a plate-shaped member.

Explanation of Reference Numerals

[0209] 1 Combine (Work Vehicle) 4 Traveling Body 12 Driver's Cab 30 Cabin 35 Roof Portion 37 Left Side Face Portion of Cabin (One Side Face Portion) 50 Roof Panel 60 Antenna Unit 70 Support Frame (Support Member) 76 Front Mounting Plate 81 Rear Mounting Plate 100 Handrail Portion 102 Inclined Extension Portion 110 Upper Support Bracket 115 Fixed Plate 120 Lower Support Bracket 130 Auxiliary Antenna (Antenna) 200 Support Bracket 210 Mounting Plate

Claims

1. A work vehicle having a cabin that covers an operating unit, an antenna unit provided at an upper portion of one of the left and right side surfaces of the cabin, and a handrail portion provided on the one side surface, and the handrail portion is configured to extend vertically and has an inclined extension portion with an axial direction being a direction inclined with respect to the vertical direction. The work vehicle is characterized by the above.

2. The inclined extension portion is inclined in a direction approaching the cabin from the upper side to the lower side. The work vehicle according to Claim 1, characterized by the above.

3. The inclined extension portion has an axial direction along the vertical direction in a side view and is inclined in a direction approaching the cabin from the upper side to the lower side in a front view. The work vehicle according to Claim 2, characterized by the above.

4. The antenna unit and the handrail portion are arranged to be located in front and rear of each other in a plan view. The work vehicle according to any one of Claims 1 to 3, characterized by the above.

5. A support member provided on the one side surface and supporting the antenna unit is provided. 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 of being fixed to the one side surface. The handrail portion is provided in a state where an upper end portion is connected to the support member and a lower end portion is fixed to the one side surface. The work vehicle according to any one of Claims 1 to 4, characterized by the above.

6. The antenna unit is provided so that its position can be changed to a first height position where the whole is located above the support member and a second height position where at least a part thereof overlaps with the support member, with respect to a height position which is a vertical position. The work vehicle according to Claim 5, characterized by the above.

Images