WO2025229779A1 - Work vehicle - Google Patents

Abstract

This work vehicle comprises an operation part on which a driver rides, a cabin 10R that covers the operation part, a reception device 20 that receives a signal from a navigation satellite, and a support member 30 that supports the reception device 20. The support member 30 supports the reception device 20 in a state of being attached to the cabin 10F . The reception device 20 is disposed so that an upper end part thereof is positioned lower than an upper end part of the cabin 10R.

Description

Work vehicle

The present invention relates to a work vehicle equipped with a receiving device that receives signals from a navigation satellite.

For example, the work vehicle (referred to as a "combine" in the literature) disclosed in Japanese Patent Publication No. 2018-117613 has a receiving device attached to the cabin that receives signals from navigation satellites.

Japanese Patent Application Publication No. 2018-117613

When the receiving device receives signals from a satellite, it is desirable to position the receiving device as high as possible to improve positioning accuracy. However, work vehicles are stored in storage facilities such as barns during times other than harvest season. The ceilings of storage facilities may be low, which could lead to interference between the ceiling and the receiving device. For this reason, a configuration that allows the position of the receiving device to be changed between use and storage is conceivable, but changing the position of the receiving device between use and storage is often a hassle for workers. The object of the present invention is to provide a work vehicle that achieves both high positioning accuracy of the receiving device and ease of use for workers.

The work vehicle of the present invention is characterized by comprising a driver's section in which the driver sits, a cabin that covers the driver's section, a receiving device that receives signals from a navigation satellite, and a support member that is attached to the cabin and supports the receiving device, with the receiving device being positioned so that its upper end is lower than the upper end of the cabin.

According to the present invention, even if the ceiling of the storage facility is low, there is almost no risk of interference between the ceiling and the receiving device. As a result, workers and managers can store the work vehicle of the present invention in the storage facility in the same way as conventional work vehicles. This makes it possible to realize a work vehicle that combines the positioning accuracy of the receiving device with ease of use for workers.

In the present invention, the cabin preferably has a resin cover that covers the driver's section from above, and a frame that is supported by the aircraft body and supports the cover in a manner that overlaps with the cover in a plan view of the aircraft, and the receiving device is preferably positioned so that at least a portion of the cover is located within the range of the receiving area of the receiving device.

With this configuration, the cover is made of resin, so it is less likely to block signals from navigation satellites. As a result, when using the work vehicle, the receiver can reliably receive signals from navigation satellites without the worker having to go to the trouble of changing the position of the receiver. This makes it possible to create a work vehicle that combines high positioning accuracy with ease of use for the worker.

In the present invention, it is preferable that the receiving device be positioned so that the entire frame portion is located outside the range of the receiving area.

This configuration prevents the frame from interfering with signals from navigation satellites.

In this invention, a conveying device is provided that includes a vertical conveying unit that vertically conveys grains stored in a grain tank that stores grains; and a horizontal conveying unit that is connected to the upper end of the vertical conveying unit and is configured to be able to move up and down and swivel left and right around the upper end of the vertical conveying unit, and that feeds and discharges the grains from the vertical conveying unit laterally; and a control unit that controls the vertical lifting and lateral rotation of the horizontal conveying unit, wherein the receiving device is positioned within a range in which the horizontal conveying unit can swivel left and right in a plan view of the machine body, and is positioned within a range in which the horizontal conveying unit can move up and down in a side view of the machine body, and the control unit is preferably configured to permit the lateral rotation across the receiving device when the entire interfering portion of the horizontal conveying unit that overlaps with the receiving device in a plan view of the machine body is located above the receiving device, and not permit the lateral rotation across the receiving device when the entire interfering portion is not located above the receiving device.

With this configuration, when the horizontal conveying section of the conveying device rotates across the receiving device, the horizontal conveying section can rotate across the receiving device only if the interference area between the horizontal conveying section and the receiving device is located above the receiving device. This prevents the horizontal conveying section from coming into contact with the receiving device.

In the present invention, it is preferable that the cabin overlaps with a straight line connecting the end of the receiving device opposite the side where the cabin is located and the axis of the left and right rotation.

With this configuration, even if the horizontal conveying unit's vertical swing angle is less than a predetermined angle and it is about to rotate across the receiving device, the horizontal conveying unit will come into contact with the cabin before coming into contact with the receiving device, thereby preventing the horizontal conveying unit from rotating. This reliably prevents the horizontal conveying unit from coming into contact with the receiving device.

In the present invention, the lateral conveying unit is capable of extending outward from the machine body to discharge grains from a home position that spans the center of the machine body when viewed from above, and is provided with a holding unit that supports the lateral conveying unit from below to hold it in the home position, and it is preferable that the distance between the holding unit and the cabin is shorter than the distance between the interference portion and the receiving device.

With this configuration, even if the horizontal conveyor supported by the holding part is about to rotate across the receiving device, the holding part will come into contact with the rear of the cabin before the horizontal conveyor comes into contact with the receiving device, thereby preventing the horizontal conveyor from rotating. This reliably prevents contact between the horizontal conveyor and the receiving device.

In the present invention, it is preferable that the receiving device has a connection port for connecting to a terminal of a harness, and that the support member has a first mounting portion on which the harness is placed, and vertical wall portions extending vertically from the front and rear of the first mounting portion to a position corresponding to at least the top of the connection port.

With this configuration, the vertical wall portion extends to a height corresponding to the connection port of the receiving device and the terminals of the harness. This allows the vertical wall portion to protect the connection port and terminals.

In the present invention, it is preferable that at least one of the first mounting portion and the vertical wall portion is provided with a clamp for securing the harness.

With this configuration, the harness is firmly supported by the support member. This prevents the harness terminal from accidentally coming loose from the connection port of the receiving device.

In the present invention, it is preferable that the receiving device is provided with a graphic code indicating information related to the receiving device's management number, and that the support member is formed with an opening through which the graphic code can be seen.

With this configuration, workers and others can view the graphic code written on the receiving device supported by the support member through the opening. This allows workers and others to obtain the information written on the graphic code without having to remove the receiving device attached to the work vehicle.

In the present invention, it is preferable that the graphic code is attached to the bottom surface of the receiving device, the support member has a second mounting portion for mounting and supporting the bottom surface, and the opening is formed in a portion of the second mounting portion facing the graphic code.

With this configuration, openings are formed in the locations necessary for recognizing the graphic code. Therefore, even if the receiving device is placed in a high position, workers can obtain the information written on the graphic code from below.

In the present invention, it is preferable that the receiving device be supported by the support member in a state where it is biased to the left or right with respect to the lateral center of the aircraft.

With this configuration, the precision of the clearance between the receiver and the aircraft can be lower than with a configuration in which the receiver is supported at the center of the aircraft's left and right sides. This improves the ease of assembly for workers.

FIG. 1 is an overall side view of a combine harvester. FIG. 1 is an overall plan view of a combine harvester. FIG. 2 is a front view of the aircraft showing the receiving device and a support structure for the receiving device. FIG. 2 is a plan view of the aircraft showing a receiving device and a support structure for the receiving device. FIG. 2 is a left side view of the aircraft body showing the receiving device and a support structure for the receiving device. FIG. 10 is a block diagram showing the rotation control of the grain discharge device. FIG. 10 is a flowchart showing the rotation control of the grain discharge device. FIG. 2 is a bottom view of the fuselage showing the receiving device and a support structure for the receiving device.

The following describes the work vehicle of this embodiment, using a head-feeding combine as an example.

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

[Overall information about combine harvesters]
As shown in Figure 1, the traveling body 1 of the combine harvester includes a body frame 2, which is formed by connecting a plurality of steel members such as square pipes. A pair of left and right crawler-type traveling devices 3 are mounted on the lower part of the body frame 2. A driving section 5 is provided on the right side of the front of the traveling body 1. An engine E is disposed below the driving section 5. The driving section 5 is covered by a cabin 10.

A reaping unit 4 is mounted at the front of the traveling body 1 and is capable of being raised and lowered. The reaping unit 4 raises and reaps multiple rows of planted rice or wheat stalks (crops) in front of the traveling body 1, and transports the harvested stalks toward the rear of the machine body. A threshing device 6 and a grain tank 8 are supported side-by-side at the rear of the machine body frame 2. The threshing device 6 is located behind the reaping unit 4, and the grain tank 8 is located behind the driver's unit 5. A feed chain 7 is mounted on the left side of the threshing device 6, and the feed chain 7 clamps and transports the harvested stalks harvested by the reaping unit 4 toward the rear. The threshing device 6 threshes the harvested stalks that have been fed in, and then performs a sorting process to separate the grains and dust obtained through the threshing process. The grain tank 8 stores the threshed grain transported from the threshing device 6. A grain discharge device 9 that removes grain from the grain tank 8 is connected to the rear of the grain tank 8. The grain discharge device 9 corresponds to a "conveyor device."

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

The horizontal conveying section 9B is configured to be able to move up and down and pivot left and right by a pivot motor 9M (see Figure 6) and a lifting hydraulic port 9H (see Figure 6). In other words, the horizontal conveying section 9B is configured to be able to move up and down and pivot left and right with the upper end of the vertical conveying section 9A as its base end. The control section 40, described below, controls the vertical movement and left and right pivoting of the horizontal conveying section 9B.

As shown in Figures 1 and 2, when the grain discharge device 9 is not in use, the lateral conveying section 9B is positioned above the threshing device 6 and the grain tank 8, and extends forward and backward while spanning the center of the machine body in a plan view. The state of the lateral conveying section 9B in this state is referred to as the "storage state." The position of the lateral conveying section 9B in this state is referred to as the "home position." The holding section 19 supports the lateral conveying section 9B from below so as to hold it in the home position.

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

The combine harvester of this embodiment is equipped with a receiving device 20. The receiving device 20 receives GNSS (Global Navigation Satellite System, for example, GPS, GLONASS, Galileo, QZSS, and BeiDou) signals from navigation satellites (not shown) to obtain the vehicle's position. To complement the satellite navigation provided by the receiving device 20, the combine harvester is equipped with an inertial navigation unit incorporating a gyro acceleration sensor and a magnetic orientation sensor. The inertial navigation unit is, for example, a gyro acceleration sensor and a magnetic orientation sensor, and detects the angular velocity of the yaw angle of the combine harvester's traveling body 1 and the acceleration in three mutually orthogonal axis directions over time. The inertial navigation unit is located in a separate location from the receiving device 20 on the combine harvester.

The combine harvester of this embodiment is configured to be able to control the traveling device 3 so that it travels straight along a preset target direction. For example, when the traveling body 1 travels straight (including approximately straight) in the same direction for a predetermined distance based on manual operation by the driver, that target direction is set as the target direction, and a virtual line extending linearly along that target direction is set. Then, automatic steering control of the traveling device 3 is executed so that the traveling body 1 travels straight along that virtual line.

[Operation department]
The driver's section 5 is provided in a state where it is biased toward the right side of the aircraft body with respect to the center of the aircraft body. As shown in Figures 1 and 2, the driver's section 5 is covered by a cabin 10. The driver's section 5 is provided with a driver's seat 11, a front panel 12 located in front of the driver's seat 11, and a side panel 13 located to the left of the driver's seat 11. The driver's seat 11 is provided in the central area of the driver's section 5. The driver sits in the driver's seat 11. The side panel 13 is provided to the left of the driver's seat 11. In other words, the side panel 13 is provided on the side of the driver's section 5 opposite to the side where the boarding/alighting door is located.

A steering lever 16 is provided on the front panel 12. The steering lever 16 is an operating tool for driving operations and is provided on the right end of the front panel 12, located in front of the driver's seat 11. The driver in the driver's section 5 can steer the traveling device 3 by operating the steering lever 16.

The side panel 13 is provided with a main transmission control lever 18 and other components. The main transmission control lever 18 is located at the front of the side panel 13. The main transmission control lever 18 is a lever that can be swung back and forth. The driver in the driver's section 5 can change gears in the main transmission (not shown) by operating the main transmission control lever 18. The side panel 13 is adjacent to the left wall of the cabin 10.

The cabin 10 is equipped with a resin cover portion 10R and a frame portion 10F (see Figures 3 and 5) for supporting the cover portion 10R. The cover portion 10R covers the driver's section 5 from above. The frame portion 10F is supported by the aircraft frame 2 and supports the cover portion 10R while overlapping with the cover portion 10R in a plan view of the aircraft.

The receiving device 20 is supported by the frame portion 10F. The frame portion 10F is used to support both the cover portion 10R and the receiving device 20. The receiving device 20 is located above the front panel 12 when viewed from the side of the aircraft. The receiving device 20 is also located rearward of the front end of the cover portion 10R.

Although not described in detail, an electronic control unit (ECU) and other components are located behind the driver section 5. The control section 40, which will be described later, is one component of the electronic control unit. The control section 40 controls the vertical movement and left/right rotation of the horizontal conveyor section 9B.

[Regarding the receiving device and support member]
3 and 5, the receiving device 20 is supported on the frame portion 10F of the cabin 10 via a support member 30. The support member 30 is fixed to the frame portion 10F with bolts. The receiving device 20 is fixed to the support member 30 with bolts.

As shown in FIG. 2, the receiving device 20 is supported by the support member 30 in a state where it is biased to the left side of the machine body relative to the machine body lateral center CL. The machine body lateral center CL is located at the center of the reaping section 4 in the left-right direction. The combine harvester of this embodiment is not an unmanned, automatic traveling combine harvester, but is capable of automatic straight-line travel (including approximately straight-line travel) along a preset target direction. For unmanned, automatic traveling combine harvesters, a configuration in which the receiving device 20 is located at the machine body lateral center CL is preferable, but even with the configuration of this embodiment, automatic straight-line travel is possible along a preset target direction. Therefore, compared to a configuration in which the receiving device 20 is located at the machine body lateral center CL, there is greater freedom in the layout of the receiving device 20, and the installation of the receiving device 20 during the assembly process is easier.

As shown in FIG. 3, in this embodiment, the receiving device 20 is positioned so that its upper end is located higher than the upper end of the frame portion 10F. Therefore, the receiving device 20 is positioned so that the entire frame portion 10F is located outside the range of the receiving area Ra. The receiving device 20 is also positioned so that its upper end is located lower than the upper end of the cover portion 10R. Therefore, the receiving device 20 is positioned so that part of the cover portion 10R is located within the range of the receiving area Ra of the receiving device 20.

The support member 30 of this embodiment is configured so that the placement height of the receiving device 20 does not change. With this configuration, the operator does not need to change the placement height of the receiving device 20. Furthermore, the support member 30 of this embodiment is configured to support the receiving device 20 in a state where it protrudes to the left of the aircraft relative to the cabin 10. With this configuration, the distance between the receiving device 20 and the cover portion 10R increases, making it possible to minimize the overlapping area between the receiving area Ra of the receiving device 20 and the cover portion 10R.

As shown in Figures 3 to 5 and 8, the support member 30 comprises a first flat plate member 30A, a second flat plate member 30B, and a third flat plate member 30C. The first flat plate member 30A is formed by bending using a press and has a bottom surface 30d, a front wall portion 30e, and a left side wall portion 30f. The front wall portion 30e and the left side wall portion 30f are each bent at an angle of approximately 90 degrees relative to the bottom surface 30d. When viewed from the side of the aircraft, the first flat plate member 30A is formed in an L-shape by the front wall portion 30e and the bottom surface 30d. When viewed in the fore-and-aft direction of the aircraft, the first flat plate member 30A is formed in an L-shape by the left side wall portion 30f and the bottom surface 30d. This L-shaped configuration increases the rigidity of the support member 30. The first flat plate member 30A corresponds to the "first mounting portion." The third flat plate member 30C corresponds to the "second mounting portion."

Furthermore, a front-rear extension 30g is formed on the right portion of the bottom surface 30d. Bolt insertion holes are drilled in this front-rear extension 30g, and the front-rear extension 30g is fixed to the frame portion 10F with bolts.

The second flat plate member 30B is welded to each of the left side wall portion 30f and the bottom surface portion 30d. Furthermore, the third flat plate member 30C is welded to each of the upper edges of the front wall portion 30e, the left side wall portion 30f, and the second flat plate member 30B. With this configuration, the third flat plate member 30C is supported by the first flat plate member 30A and the second flat plate member 30B. Four bolt insertion holes are drilled in the third flat plate member 30C, and the receiving device 20 is fixed to the third flat plate member 30C with bolts. In other words, the bottom surface of the receiving device 20 is placed on and supported by the third flat plate member 30C.

As shown in Figure 8, two holes 30j are drilled in the bottom surface 30d. The two holes 30j are drilled at positions corresponding to two bolt insertion holes formed in the rear portion of the third flat plate member 30C. The inner diameter of the two holes 30j is larger than the inner diameter of the two bolt insertion holes formed in the rear portion of the third flat plate member 30C. Therefore, bolts can be inserted into the holes 30j, and a ratchet wrench or the like for tightening the bolts can also be inserted into the holes 30j.

As shown in FIG. 4, the receiving device 20 has a connection port 20B on its right side that connects to the connector terminal of the wire harness 32. The wire harness 32 is placed in a wound state on the bottom surface 30d, in a portion that is located between the frame portion 10F and the third flat plate member 30C in a plan view. A clamp 31 is provided on the bottom surface 30d. The wire harness 32 is fixed by the clamp 31. The connector terminal of the wire harness 32 is inserted into the connection port 20B of the receiving device 20.

The portion on which the wire harness 32 is placed is located between the front wall 30e and the second flat plate member 30B in the front-to-rear direction. Furthermore, the portion on which the wire harness 32 is placed is located between the cover 10R and the receiving device 20 in the left-to-right direction. In other words, a wall is formed around the bottom surface 30d by the cover 10R, the receiving device 20, the front wall 30e, and the second flat plate member 30B. Due to this configuration, the wire harness 32 is placed and supported on the bottom surface 30d without protruding beyond the bottom surface 30d.

With this configuration, even if the length of the wire harness 32 differs when connecting to a receiver 20 with RTK (real-time kinematic)-GNSS specifications and when connecting to a receiver 20 with differential GNSS specifications, the excess length of the wire harness 32 is firmly placed and supported on the bottom surface 30d.

A vertical wall portion 30h is formed on the front wall portion 30e. Furthermore, a vertical wall portion 30i is formed on the second flat plate member 30B. Each of the vertical wall portions 30h and 30i extends in the left-right direction in the area between the cover portion 10R and the receiving device 20 to a position higher than the height corresponding to the connection port 20B of the receiving device 20. Therefore, even when the combine harvester is washed with high-pressure water, for example, the high-pressure water does not directly hit the wire harness 32 or the connection port 20B, but is instead received by the vertical wall portions 30h and 30i.

Although Figure 3 shows only vertical wall portion 30h, vertical wall portion 30i is located behind vertical wall portion 30h and extends to the same height as vertical wall portion 30h. Note that vertical wall portion 30h and vertical wall portion 30i may each be extended to a height corresponding to the upper end of receiving device 20.

As such, the support member 30 has a bottom surface 30d on which the wire harness 32 is placed, and vertical wall portions 30h, 30i that extend vertically from the front and rear of the bottom surface 30d to positions corresponding to the top of the connection port 20B of the receiving device 20.

[Preventing contact between the receiving device and the grain discharge device]
In this embodiment, the receiving device 20 is disposed within a range in which the horizontal conveying unit 9B can swing left and right when viewed from the top of the machine body, and within a range in which the horizontal conveying unit 9B can move up and down when viewed from the side of the machine body. A control unit 40 is provided that controls to limit the swing of the horizontal conveying unit 9B to prevent contact between the receiving device 20 and the grain discharge device 9. As shown in FIG. 6 , a swing angle detection unit 41 and a vertical swing angle detection unit 42 are connected to the control unit 40. The control unit 40 controls the swing motor 9M and the lifting hydraulic port 9H based on the detection results of the swing angle detection unit 41 and the vertical swing angle detection unit 42, respectively.

Referring to the flowchart in Figure 7, the control unit 40 determines whether the rotation angle of the horizontal conveying unit 9B detected by the rotation angle detection unit 41 is within the interference range α shown in Figure 2 (Step #01). If the rotation angle of the horizontal conveying unit 9B is outside the interference range α (Step #01: No), the control unit 40 allows the lifting hydraulic port 9H to drive both the upward and downward directions, and allows the rotation motor 9M to rotate both left and right (Step #04). The home position of the horizontal conveying unit 9B is located to the left of the interference range α. The interference range α is adjacent to the right of the home position.

If the rotation angle of the horizontal conveying unit 9B is within the interference range α (Step #01: Yes), the control unit 40 determines whether the vertical swing angle of the horizontal conveying unit 9B detected by the vertical swing angle detection unit 42 is equal to or greater than a predetermined angle (Step #02). The "predetermined angle" is the lower limit angle at which the entire interfering portion 9D of the horizontal conveying unit 9B that overlaps with the receiving device 20 in a plan view of the machine is located above the receiving device 20, and the interfering portion 9D does not come into contact with the receiving device 20.

Incidentally, within the interference range α shown in Figure 2, if the vertical swing angle of the horizontal conveying section 9B is less than a predetermined angle, the horizontal conveying section 9B will come into contact with the rear of the cover section 10R. Therefore, the "predetermined angle" also means the lower limit angle at which the horizontal conveying section 9B and the rear of the cover section 10R do not come into contact.

If the vertical swing angle of the horizontal conveying section 9B is equal to or greater than a predetermined angle (Step #02: Yes), the control section 40 allows the lifting hydraulic port 9H to drive both the upward and downward directions, and allows the swing motor 9M to swing both left and right (Step #04).

If the vertical swing angle of the horizontal conveying unit 9B is less than a predetermined angle (Step #02: No), the control unit 40 allows the lifting hydraulic port 9H to drive only in the upward direction, and allows the turning motor 9M to drive only in the direction away from the receiving device 20 (Step #03). This prevents contact between the horizontal conveying unit 9B and the receiving device 20 when the horizontal conveying unit 9B turns across the receiving device 20.

The home position of horizontal conveying unit 9B is adjacent to the left side of interference range α. Therefore, when horizontal conveying unit 9B is located at the home position in a plan view of the machine body, horizontal conveying unit 9B can move up and down. However, because the right side of the home position is within interference range α, horizontal conveying unit 9B cannot turn right from the home position unless it is elevated by a predetermined angle or more.

In this way, the control unit 40 is configured to permit left and right turns across the receiving device 20 when the entire interfering portion 9D of the horizontal conveying unit 9B that overlaps with the receiving device 20 in a plan view of the machine body is located above the receiving device 20, and not permit left and right turns across the receiving device 20 when the entire interfering portion 9D is not located above the receiving device 20.

Furthermore, Figure 2 shows a straight line L1 connecting the axis Y of the left-right rotation of the horizontal conveying unit 9B and the end of the receiving device 20 opposite the side where the cabin 10 is located. The rear of the cabin 10 overlaps the middle of the straight line L1. In other words, the straight line L1 and the cabin 10 overlap. Therefore, even if the horizontal conveying unit 9B rotates clockwise when the vertical swing angle of the horizontal conveying unit 9B is less than a predetermined angle, the horizontal conveying unit 9B will come into contact with the rear of the cabin 10 before coming into contact with the receiving device 20, thereby preventing the horizontal conveying unit 9B from rotating clockwise. Furthermore, within the interference range α shown in Figure 2, if the vertical swing angle of the horizontal conveying unit 9B is less than a predetermined angle, the horizontal conveying unit 9B will come into contact with the rear of the cover unit 10R before coming into contact with the receiving device 20, thereby preventing the horizontal conveying unit 9B from descending. This reliably avoids contact between the horizontal conveying unit 9B and the receiving device 20.

Furthermore, as shown in Figure 2, the distance D1 between the holding portion 19 and the cabin 10 is shorter than the distance D2 between the interference portion 9D and the receiving device 20. Therefore, even if an unintended rotational force acts on the horizontal conveying unit 9B supported by the holding portion 19, the holding portion 19 will come into contact with the rear of the cabin 10 before the horizontal conveying unit 9B comes into contact with the receiving device 20, thereby preventing the horizontal conveying unit 9B from rotating clockwise. This reliably prevents contact between the horizontal conveying unit 9B and the receiving device 20.

In this way, the cabin 10 and holding portion 19 of this embodiment also serve as protective members for the receiving device 20.

[Obtaining the control number of the receiving device]
8, in this embodiment, a graphic code 20A is attached to the bottom surface of the receiving device 20. The graphic code 20A is, for example, a barcode or a two-dimensional code (e.g., QR Code (registered trademark), Data Matrix), etc., and indicates information such as the serial number and management number of the receiving device 20.

In this embodiment, openings 30k and 30m through which the graphic code 20A can be seen are formed in the support member 30. Opening 30k is formed in the bottom surface 30d of the first flat plate member 30A, and opening 30m is formed in the third flat plate member 30C. Each of openings 30k and 30m is formed in a portion facing the graphic code 20A. Openings 30k and 30m overlap in a plan view of the aircraft. Opening 30m is located above opening 30k.

For example, when the support member 30 is fixed to the frame portion 10F of the cabin 10 and the receiving device 20 is fixed to the support member 30, a worker or the like can see the graphic code 20A through the openings 30k, 30m. In this state, the worker or the like holds a reading device (a code reader or a smartphone camera can also be used) over the graphic code 20A, and when information such as the serial number and control number of the receiving device 20 is obtained by the reading device, it becomes possible to reliably link the serial number of the combine with information related to the receiving device 20. This simplifies serial number management and quality control of the combine and the receiving device 20, respectively.

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

(1) In the above embodiment, the receiving device 20 is supported by the support member 30 in a state where it is biased to the left with respect to the aircraft's left-right center CL. This embodiment is not limited to this, and the receiving device 20 is supported by the support member 30 in a state where it is biased to the right with respect to the aircraft's left-right center CL. In this case, the receiving device 20 may be configured to be supported by the cabin 10 via the support member 30 in a state where it is located to the right of the cabin 10. In other words, the receiving device 20 may be supported by the support member 30 in a state where it is biased to one side, left or right, with respect to the aircraft's left-right center CL.

(2) In the above embodiment, the cover portion 10R of the cabin 10 is made of resin. This is not limited to this embodiment, and the cover portion 10R may also be made of a flexible hood.

(3) In the above embodiment, the cover unit 10R is positioned so that a portion thereof is located within the reception area Ra of the receiving device 20. This embodiment is not limited to this, and the entire cover unit 10R may be positioned so that it is located within the reception area Ra of the receiving device 20. In other words, the receiving device 20 may be positioned so that at least a portion of the cover unit 10R is located within the reception area Ra of the receiving device 20.

(4) In the above embodiment, the graphic code 20A is attached to the bottom surface of the receiving device 20. This is not limited to this embodiment, and the graphic code 20A may be attached to the side surface of the receiving device 20. In this case, the openings 30k and 30m may not be formed.

Note that the configurations disclosed in the above-described embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with configurations disclosed in other embodiments, provided that no contradictions arise. Furthermore, the embodiments disclosed in this specification are merely examples, and the present invention is not limited to these embodiments, and can be modified as appropriate within the scope of the purpose of the present invention.

The present invention is applicable to work vehicles equipped with a receiving device that receives signals from navigation satellites.

5: Driving section 8: Grain tank 9A: Vertical conveying section 9B: Horizontal conveying section 9D: Interference section 10: Cabin 10F: Frame section 10R: Cover section 19: Holding section 20: Receiving device 20A: Graphic code 20B: Connection port 30: Support member 30A: First flat plate member (first placement section)
30C: Third flat plate member (second mounting part)
30h: Vertical wall portion 30i: Vertical wall portion 30k: Opening 30m: Opening 31: Clamp 32: Wire harness (harness)
40: Control unit CL: Left-right center of the aircraft D1: Distance between the holding unit and the cabin D2: Distance between the interference part and the receiver L1: Straight line connecting the left end of the receiver and the axis of left-right turning Y: Axis of left-right turning

Claims (11)

A driving section in which a driver rides;
a cabin covering the driver's section;
a receiving device for receiving signals from a navigation satellite;
a support member attached to the cabin and supporting the receiving device,
The receiving device is disposed on the work vehicle so that its upper end is positioned lower than the upper end of the cabin. the cabin includes a resin cover portion that covers the driver's section from above, and a frame portion that is supported by an aircraft body and supports the cover portion in a state where the frame portion overlaps with the cover portion in a plane view of the aircraft body;
The work vehicle according to claim 1 , wherein the receiving device is disposed so that at least a portion of the cover portion is located within a receiving area of the receiving device. The work vehicle described in claim 2, wherein the receiving device is positioned so that the entire frame portion is located outside the range of the receiving area. a conveying device including: a vertical conveying section that vertically conveys grains stored in a grain tank that stores grains; and a horizontal conveying section that is connected to an upper end of the vertical conveying section, is configured to be able to move up and down and turn left and right with the upper end of the vertical conveying section as a base end, and conveys the grains from the vertical conveying section horizontally and discharges them;
a control unit that controls the vertical movement and left/right rotation of the horizontal conveying unit,
the receiving device is disposed within a range in which the horizontal conveying unit can turn left and right when viewed from the top of the machine body, and is also disposed within a range in which the horizontal conveying unit can move up and down when viewed from the side of the machine body,
A work vehicle as described in any one of claims 1 to 3, wherein the control unit is configured to permit the left and right turns across the receiving device when the entire interfering portion of the lateral conveying unit that overlaps with the receiving device in a planar view of the vehicle is located above the receiving device, and to not permit the left and right turns across the receiving device when the entire interfering portion is not located above the receiving device. The work vehicle described in claim 4, wherein the cabin overlaps with a straight line connecting the end of the receiving device opposite the side where the cabin is located and the axis of the left and right rotation. The horizontal conveying unit is capable of extending outward from the machine body from a state in which it is stored in a home position spanning the center portion of the machine body in a plan view of the machine body to discharge grains,
a holding portion that supports the lateral conveying portion from below so as to hold the lateral conveying portion at the home position;
6. The work vehicle according to claim 4, wherein the distance between the holding portion and the cabin is shorter than the distance between the interference portion and the receiving device. the receiving device has a connection port for connection to a terminal of a harness,
7. A work vehicle as described in any one of claims 1 to 6, wherein the support member has a first mounting portion on which the harness is placed, and vertical wall portions extending vertically from the front and rear of the first mounting portion to a position corresponding to at least the top of the connection port. The work vehicle according to claim 7, wherein at least one of the first mounting portion and the vertical wall portion is provided with a clamp for securing the harness. a graphic code indicating information relating to the management number of the receiving device is assigned to the receiving device;
The work vehicle according to any one of claims 1 to 8, wherein the support member has an opening through which the graphic code can be seen. the graphic code is attached to a bottom surface of the receiving device;
the support member has a second mounting portion on which the bottom surface portion is mounted and supported,
The work vehicle according to claim 9, wherein the opening is formed in a portion of the second placement section that faces the graphic code. A work vehicle as described in any one of claims 1 to 10, wherein the receiving device is supported by the support member in a state where it is biased to the left or right with respect to the lateral center of the vehicle body.