Work vehicle

Abstract

To provide a work vehicle which can prevent interference of an antenna.SOLUTION: A tractor 1 includes an antenna device 500 which is capable of communication using an antenna 510. The antenna device 500 has a mounting portion 520 which is mounted on a cabin 10 of the tractor 1, and an antenna fixing portion 530 to which the antenna 510 is fixed and which is connected to the mounting portion 520 so as to be movable between a use position, in which and the antenna 510 is supported to be positioned higher than the height of a roof 11 of the cabin 10, and a storage position, in which the antenna 510 is supported to be positioned lower than the height of the roof 11.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Conventionally, technology for a work vehicle equipped with an antenna device has been publicly known, as described in Patent Document 1, for example.

[0003] Patent Document 1 describes a tractor equipped with a GPS antenna for receiving signals from an artificial satellite. The GPS antenna is erected on the ceiling of the cabin.

[0004] However, when the tractor is stored in a shipping container or the like, the GPS antenna as described above may interfere with the ceiling of the container, etc. For this reason, a work vehicle that can prevent antenna interference is required. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2022-191872 A Summary of the Invention [Problem to be solved by the invention]

[0006] One aspect of the present disclosure has been made in consideration of the above-mentioned circumstances, and a problem to be solved is to provide a work vehicle that is capable of preventing antenna interference. [Means for solving the problem]

[0007] The problem to be solved by one embodiment of the present disclosure has been described above. Next, the means for solving this problem will be described.

[0008] A work vehicle according to one embodiment of the present disclosure is a work vehicle equipped with an antenna device capable of communication using an antenna, the antenna device comprising: a mounting portion that is attached to a cabin of the work vehicle; a utilization position to which the antenna is fixed and which supports the antenna so as to be positioned above the height of the roof of the cabin; a storage position to which the antenna is supported so as to be positioned below the height of the roof; and an antenna fixing portion that is movably connected to the mounting portion. According to one aspect of the present disclosure, antenna interference can be prevented.

[0009] A work vehicle according to one embodiment of the present disclosure is provided with a fastening portion capable of fastening the antenna fixing portion to the mounting portion when the work vehicle is positioned in the utilization position and when the work vehicle is positioned in the storage position, and the fastening portion is formed so that the antenna fixing portion can be fastened and detached by manual operation. According to one aspect of the present disclosure, the mounting portion and the antenna fixing portion can be manually fastened together using the fastening portion.

[0010] According to one aspect of the present disclosure, the antenna fixing portion is connected to the mounting portion so as to be slidable in the vertical direction between the utilization position and the storage position. According to one aspect of the present disclosure, when changing the attitude of the antenna, interference between the antenna and structures around the cabin can be avoided.

[0011] The antenna fixing portion according to one aspect of the present disclosure includes an engaging portion that engages with the mounting portion when the antenna fixing portion is located at the utilization position. According to one aspect of the present disclosure, it is possible to prevent the antenna fixing part from unintentionally moving from the utilization position to the storage position due to the fastening of the antenna fixing part being released due to vibration of the work vehicle or the like.

[0012] In one embodiment of the antenna fixing portion of the present disclosure, when positioned in the utilization position, the longitudinal direction of the antenna is arranged so as to follow the vertical direction, and when positioned in the storage position, the longitudinal direction of the antenna is arranged so as to be inclined relative to the vertical direction. According to one aspect of the present disclosure, by tilting the antenna in the storage position, the amount of vertical sliding of the antenna fixing part can be made relatively small.

[0013] In one embodiment of the present disclosure, the antenna device is provided at the rear of the cabin, and the fastening portion is located below the opening of the rear hatch of the cabin when the antenna fixing portion is positioned in the utilization position and when it is positioned in the storage position. According to one aspect of the present disclosure, it is possible to improve the operability of the antenna device from inside the cabin.

[0014] According to one aspect of the present disclosure, the antenna fixing portion is rotatably connected to the mounting portion between the utilization position and the storage position. According to one aspect of the present disclosure, the attitude of the antenna can be changed by rotating the antenna fixing portion relative to the mounting portion. Effect of the Invention

[0015] According to one aspect of the present disclosure, antenna interference can be prevented. [Brief description of the drawings]

[0016] [Figure 1] 1 is a side view showing an overall configuration of a tractor according to one embodiment of the present disclosure. [Diagram 2] FIG. 2 is a plan view showing the overall configuration of the tractor. [Diagram 3] FIG. 4 is a rear perspective view showing the rear part of the cabin roof and the antenna device. [Figure 4] FIG. 4 is a rear perspective view showing the stay and the antenna device. [Diagram 5] FIG. 2 is an exploded perspective view showing the antenna device. [Figure 6] (a) is an enlarged rear cross-sectional view showing the support piece, the second piece, and the connecting portion, (b) is an enlarged right side view showing the support piece, the second piece, the connecting portion, and the fastening portion. [Figure 7] FIG. 4 is a right side view showing the antenna device with the antenna fixing part positioned at the utilization position. [Figure 8] FIG. 4 is a right side view showing the antenna device with the antenna fixing part positioned at the storage position. [Figure 9] 1A is a left side view showing an antenna device according to a modified example, in which the antenna fixing part is located at a utilization position, and FIG. 1B is a left side view showing an antenna device in which the antenna fixing part is located at a storage position. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] In the following description, the directions indicated by arrows U, D, F, B, L and R in the figures are defined as upward, downward, forward, backward, leftward and rightward, respectively.

[0018] First, the overall configuration of a tractor 1 according to one embodiment of the present disclosure will be described.

[0019] The tractor 1 shown in FIG. 1 mainly comprises a machine frame 2, an engine 3, a bonnet 4, a transmission case 5, front wheels 6, rear wheels 7, a fender 8, a lifting device 9, a cabin 10, a seat 20, a steering wheel 21, and the like.

[0020] The machine body frame 2 is a frame-like member formed by appropriately combining a plurality of plate materials. The machine body frame 2 is formed in a generally rectangular shape when viewed from above. The machine body frame 2 is disposed at the front of the tractor 1 with its longitudinal direction facing the front-to-rear direction. An engine 3 is fixed to the rear of the machine body frame 2. The engine 3 is covered by a bonnet 4. A transmission case 5 is fixed to the rear of the engine 3. A muffler 4a that discharges exhaust gas from the engine 3 is disposed on the right side of the bonnet 4.

[0021] The front portion of the vehicle frame 2 is supported by a pair of left and right front wheels 6 via a front axle mechanism (not shown). The rear portion of the transmission case 5 is supported by a pair of left and right rear wheels 7 via a rear axle mechanism (not shown). The pair of left and right rear wheels 7 are covered by fenders 8 from roughly above.

[0022] A lifting device 9 is provided at the rear of the transmission case 5. Various types of working equipment (e.g., a tiller) can be attached to the lifting device 9. The lifting device 9 can raise and lower the attached working equipment by an actuator such as a hydraulic cylinder. Power from the engine 3 can be transmitted to the lifting device 9 via a PTO shaft (not shown).

[0023] The power of the engine 3 is changed in speed by a transmission (not shown) housed in a transmission case 5, and then can be transmitted to front wheels 6 via the front axle mechanism, and can be transmitted to rear wheels 7 via the rear axle mechanism. The front wheels 6 and rear wheels 7 are driven to rotate by the power of the engine 3, allowing the tractor 1 to travel. In addition, a working device attached to a lifting device 9 can be driven by the power of the engine 3.

[0024] A cabin 10 is provided behind the engine 3. The cabin 10 is mounted on the vehicle body (transmission case 5, etc.). Inside the cabin 10, a living space is formed for a driver to sit in.

[0025] 1, the cabin 10 has left and right front pillars 12 that support a roof 11 at the front, and left and right rear pillars 13 that support the roof 11 at the rear.

[0026] As shown in FIG. 2, the cabin 10 has a front beam 14 that connects the upper ends of the front pillars 12. A windshield is provided within a frame formed by the front beam 14 and the left and right front pillars 12. The cabin 10 also has a rear beam 15 that connects the upper ends of the rear pillars 13. As shown in FIG. 1 and FIG. 3, a rear hatch 16 that can be opened and closed is provided at the rear of the cabin 10. The rear hatch 16 is rotatably supported at the rear end of the rear beam 15. As shown in FIG. 2, a pair of stays 15a to which appropriate members can be attached are provided at a distance in the left-right direction on the rear surface of the rear beam 15. A work light 15b, a low-speed vehicle mark 15c, etc. are provided on the stay 15a (see FIG. 3).

[0027] As shown in Fig. 1, a seat 20 for a driver to sit on is disposed approximately in the center of the cabin 10. The cabin 10 is also provided with an auxiliary step 20a for getting on and off the seat 20. The auxiliary step 20a is provided on at least the left side of the cabin 10. The auxiliary step 20a can be provided on both sides of the cabin 10. A steering wheel 21 for adjusting the turning angle of the front wheels 6 is also disposed in the front of the cabin 10.

[0028] As shown in Figures 1 and 2, the tractor 1 is equipped with a position detection device 30 capable of detecting the position of the vehicle body, cameras (front camera 51, side camera 52, and rear camera 53) capable of capturing images of the area around the vehicle body, a radar unit 100 capable of detecting objects around the vehicle body, and an antenna device 500 capable of communication.

[0029] The position detection device 30 is a device capable of detecting the position of the vehicle body (position information including latitude and longitude) by using a satellite positioning system such as GPS, various sensors, etc. The tractor 1 can execute control for automatically steering the vehicle body based on the position information detected by the position detection device 30. The above control includes, for example, control for automatically steering the vehicle body so as to travel straight in parallel with a set predetermined travel reference line, and control for automatically traveling the vehicle body along a created target travel route.

[0030] The position detection device 30 is supported by a support mechanism 40 attached to the cabin 10. The support mechanism 40 is disposed so as to span the left and right front pillars 12. The support mechanism 40 is disposed so as to be located in front of the roof 11. The support mechanism 40 is also provided rotatably with respect to the left and right front pillars 12, via left and right connecting parts, about a central axis facing in the left and right direction. As shown in FIG. 2, the position detection device 30 is disposed approximately in the center of the support mechanism 40 in the left and right direction.

[0031] A plurality of cameras (a front camera 51, a side camera 52, and a rear camera 53) shown in Figs. 1 and 2 are provided for the cabin 10 (five in this embodiment). Specifically, the front camera 51 is provided at the front of the cabin 10 (more specifically, at a portion corresponding to a front side of the cabin 10 formed in a rectangular shape in a plan view). A pair of left and right side cameras 52 are provided at both left and right sides of the cabin 10 (more specifically, at portions corresponding to left and right sides of the cabin 10 formed in a rectangular shape in a plan view). A pair of left and right rear cameras 53 are provided at the rear of the cabin 10 (more specifically, at portions corresponding to a rear side of the cabin 10 formed in a rectangular shape in a plan view).

[0032] Each camera is positioned so that it faces approximately 45 degrees downward. By standardizing the angles in this way, it is possible to improve the distance measurement performance of each camera and optimize the field of view of each camera.

[0033] By using the above-mentioned cameras, it is possible to capture images of the front, both left and right sides, and the rear of the tractor 1. The tractor 1 can control the operation of the vehicle body based on the images captured by each camera. For example, it is possible to learn the appearance of a person based on the images captured by each camera, and control the tractor 1 to stop when a person is approaching the vicinity of the tractor 1 based on the image capture results of each camera. Note that the use of each camera is not limited to this, and the captured images can be used for various purposes.

[0034] The radar unit 100 is capable of detecting a detection target within a predetermined detection range. Examples of detection targets include structures made of metal or concrete, other vehicles, people, etc.

[0035] As shown in Figs. 1 and 2, in this embodiment, a plurality (four) of radar units 100 (front radar unit 100F, rear radar unit 100B, left radar unit 100L, and right radar unit 100R) are provided on the tractor 1. Specifically, the front radar unit 100F is provided in the front of the bonnet 4 of the tractor 1. Furthermore, the rear radar unit 100B is provided in the rear of the cabin 10. Furthermore, the left radar unit 100L is provided in the left of the cabin 10, and the right radar unit 100R is provided in the right of the cabin 10.

[0036] The front radar unit 100F is attached to the body of the tractor 1 (the front part of the body frame 2) by a front support member 200. In addition, the front surface of the front support member 200 is covered by a design cover 300.

[0037] The rear radar unit 100B is attached to the body (rear beam 15) of the tractor 1 by a rear support member 400. The rear support member 400 is formed in a shape that is long in the left-right direction. Both left-right ends of the rear support member 400 are fixed to a pair of stays 15a provided on the rear beam 15 by bolts or the like.

[0038] By using the above-mentioned multiple radar units 100, it is possible to detect a wide range around the tractor 1. Furthermore, the detection results by each radar unit 100 can be utilized for controlling the traveling of the vehicle, etc.

[0039] The antenna device 500 will be described below. The antenna device 500 is capable of communication using an antenna 510 described later. The antenna device 500 is provided on the upper part of the cabin 10 of the tractor 1 (near the roof 11). In this embodiment, an example is shown in which the antenna device 500 is provided on the left stay 15a of a pair of stays 15a of the rear beam 15. As shown in FIG. 3, the antenna device 500 is disposed between the work light 15b and the low-speed vehicle mark 15c located on the left side and the rear hatch 16 located on the right side.

[0040] Here, when the tractor 1 is used, it is desirable to set the height of the antenna 510 sufficiently higher than the roof 11. On the other hand, when the tractor 1 is stored in a shipping container or the like, it is desirable to set the antenna 510 lower in order to prevent the antenna 510 from interfering with the ceiling of the container or the like.

[0041] Therefore, the antenna device 500 is formed so as to be displaceable between a state in which the antenna 510 is located above the height of the roof 11 (as shown in FIG. 7, a state in which an antenna fixing part 530, described later, is located in a usage position) and a state in which the antenna 510 is located below the height of the roof 11 (as shown in FIG. 8, a state in which the antenna fixing part 530 is located in a storage position). The configuration of the antenna device 500 will be described below with reference to the antenna device 500 in the usage position shown in FIGS. 3 to 7. The usage position and storage position will be described in detail later. The antenna device 500 includes an antenna 510, an attachment part 520, and an antenna fixing part 530.

[0042] The antenna 510 shown in Figures 4, 5 and 7 transmits and receives (communicates) radio waves. The antenna 510 is formed to extend in the vertical direction. Appropriate wiring (not shown) is connected to the antenna 510. The antenna 510 includes a first antenna 511 and a second antenna 512. The first antenna 511 and the second antenna 512 are arranged with an interval between them in the front-rear direction.

[0043] The first antenna 511 is for communicating with a remote controller used for remotely controlling the tractor 1 (starting, stopping, moving forward, moving backward, etc.).

[0044] The second antenna 512 transmits and receives information wirelessly. Specifically, the second antenna 512 transmits and receives information on the position of the tractor 1, the imaging results of the camera, and information for checking the status of automatic driving. The second antenna 512 is provided forward of the first antenna 511. The positional relationship between the first antenna 511 and the second antenna 512 is not limited to the example described above. For example, the second antenna 512 may be provided rearward of the first antenna 511. The first antenna 511 and the second antenna 512 may be disposed in approximately the same front-to-rear position (side-by-side, left and right).

[0045] The mounting portion 520 shown in Figures 4, 5 and 7 is attached to the stay 15a of the rear beam 15 and supports an antenna fixing portion 530, which will be described later. The mounting portion 520 is formed in a substantially L-shape in a plan view. The mounting portion 520 is formed of a metal plate. The mounting portion 520 includes a mounting piece portion 521 and a support piece portion 522.

[0046] The mounting piece portion 521 shown in FIG. 5 is a portion that is attached to the stay 15a. The mounting piece portion 521 constitutes one side of an L-shape in a plan view. The mounting piece portion 521 is provided so that its thickness direction faces the front-rear direction. The mounting piece portion 521 is formed with a fixing hole 521a that penetrates in the front-rear direction. A pair of fixing holes 521a are formed with a gap between them in the left-right direction. The mounting piece portion 521 is fixed to the stay 15a using fasteners such as bolts that are inserted into the fixing holes 521a (see FIG. 4).

[0047] The support piece portion 522 shown in Figs. 5 to 7 is a portion that supports the antenna fixing portion 530. The support piece portion 522 supports the antenna fixing portion 530 so as to be slidable in the up-down direction. The sliding of the antenna fixing portion 530 will be described later. The support piece portion 522 extends rearward from the right end portion of the mounting piece portion 521 so as to form the other side of the L-shape in plan view. The support piece portion 522 is provided so that the thickness direction faces the left-right direction. The support piece portion 522 is formed in a shape that is elongated in the up-down direction. The support piece portion 522 has a slide hole 522a and an engagement hole 522b.

[0048] The slide hole 522a is a portion that guides the vertical sliding of the antenna fixing portion 530 described later. The slide hole 522a is formed in a long hole shape that penetrates the support piece portion 522 in the left-right direction and extends in the up-down direction. The slide hole 522a is formed over almost the entire support piece portion 522 in the up-down direction.

[0049] 5 and 6(b) is a portion that engages with the antenna fixing portion 530 (fastening portion 534 described later) in the usage position. As shown in Fig. 6(b), the engagement hole 522b has a first portion 522c that extends rearward from a vertical middle portion of the slide hole 522a, and a second portion 522d that extends downward from a rear end portion of the first portion 522c. That is, the engagement hole 522b is formed in a substantially L-shape in a side view.

[0050] 5, the antenna 510 is fixed to the antenna fixing portion 530, which is supported by the mounting portion 520. The antenna fixing portion 530 is connected to the mounting portion 520 so as to be slidable along the slide hole 522a. The antenna fixing portion 530 is formed in a substantially L-shape when viewed from the front (rear). The antenna fixing portion 530 is formed of a metal plate. The antenna fixing portion 530 includes a first piece 531, a second piece 532, a connecting portion 533, and a fastening portion 534.

[0051] The first piece 531 is a portion to which the antenna 510 is fixed. The first piece 531 constitutes one side of an L-shape in a front view. The first piece 531 is provided so that the thickness direction faces the up-down direction. The first antenna 511 and the second antenna 512 are fixed to the first piece 531 with a gap therebetween in the front-rear direction.

[0052] The second piece 532 is a portion that is connected to the support piece 522. The second piece 532 is disposed along the left surface of the support piece 522. The second piece 532 extends downward from the right end of the first piece 531 so as to form the other side of the L-shape in front view. The second piece 532 is provided so that the thickness direction faces the left-right direction. The second piece 532 is formed in a shape that is elongated in the vertical direction. The second piece 532 is formed so as to bend at a middle portion in the vertical direction in side view. Specifically, the second piece 532 is formed so as to extend downward until it reaches a middle portion in the vertical direction, and extend obliquely backward and downward from the middle portion. The second piece 532 has a connecting hole 532a and a fastening hole 532c.

[0053] The connecting hole 532a is for attaching the connecting portion 533 described later. The connecting hole 532a is formed so as to penetrate in the left-right direction through a vertical intermediate portion (bent portion) of the second piece 532. As shown in Figs. 5 and 6(a), in this embodiment, a nut 532b having a screw hole is provided on the left surface of the portion of the second piece 532 where the connecting hole 532a is formed. The nut 532b is fixed to the second piece 532 by welding or the like so that the screw hole and the second piece 532 overlap in a side view.

[0054] The fastening hole 532c is for attaching a fastening hole 532c described later. The fastening hole 532c is formed so as to penetrate the lower end portion of the second piece 532 in the left-right direction.

[0055] 5 and 6 slidably connects the antenna fixing part 530 to the mounting part 520. In this embodiment, a bolt (step bolt) that can be engaged with the nut 532b is used as the connecting part 533. As shown in FIG. 6(a), the connecting part 533 has a shaft part 533a that can be engaged with the nut 532b, a step part 533b that is enlarged in diameter relative to the shaft part 533a and has an outer diameter larger than the inner diameter of the connecting hole 532a, and a head part 533c that is enlarged in diameter relative to the step part 533b and engages with a tool such as a wrench.

[0056] With the shaft portion 533a of the connecting portion 533 inserted into the slide hole 522a of the mounting portion 520 and the connecting hole 532a of the antenna fixing portion 530, the connecting portion 533 can be fastened to the nut 532b using a tool such as a wrench engaged with the head portion 533c, thereby connecting the antenna fixing portion 530 to the mounting portion 520.

[0057] As shown in Fig. 6(a), when the above-mentioned members are connected, the step portion 533b abuts against the right surface of the second piece portion 532. In this state, a small gap is formed between the head portion 533c of the connecting portion 533 and the support piece portion 522. An appropriate washer is provided in the gap. By connecting the above-mentioned members so as to form the gap, the antenna fixing portion 530 becomes slidable along the slide hole 522a relative to the mounting portion 520.

[0058] 5 and 6(a) fastens the antenna fixing part 530 to the attachment part 520. The fastening part 534 is formed so that the antenna fixing part 530 can be fastened and released by manual operation. The fastening part 534 includes a bolt 534a and an operation part 534b.

[0059] 5 is inserted from the left through the fastening hole 532c of the second piece 532 and the slide hole 522a or the engagement hole 522b of the support piece 522. The bolt 534a is formed with a threaded portion that engages with an operation portion 534b (described later). The bolt 534a is fixed to the second piece 532 by welding or the like in a state where it is inserted through the fastening hole 532c.

[0060] The operation part 534b is operated manually. The operation part 534b is held by an operator who changes the position of the antenna fixing part 530. The operation part 534b has a screw hole formed therein to engage with the screw part of the operation part 534b. The operation part 534b is disposed to the right of the support piece part 522. A general knob nut can be adopted as the operation part 534b. The operation part 534b is provided rotatably around a rotation axis (bolt 534a) along the left-right direction.

[0061] The worker rotates the operating portion 534b and tightens the operating portion 534b against the bolt 534a inserted through the second piece 532 and the support piece 522, thereby fastening the antenna fixing portion 530 to the mounting portion 520. In this state, the antenna fixing portion 530 cannot slide relative to the mounting portion 520. The worker also rotates the operating portion 534b in the direction opposite to the tightening direction and loosens the operating portion 534b against the bolt 534a, thereby releasing the fastening of the antenna fixing portion 530 to the mounting portion 520. In this state, the antenna fixing portion 530 can slide relative to the mounting portion 520.

[0062] In the antenna device 500 as described above, the attachment part 520 and the antenna fixing part 530 are connected by the connecting part 533 and the fastening part 534. Moreover, the antenna device 500 is formed so that the antenna fixing part 530 can be moved relative to the attachment part 520 between a usage position shown in Fig. 7 and a storage position shown in Fig. 8.

[0063] 7 shows the antenna device 500 with the antenna fixing part 530 in the utilization position. In this state, the upper end of the antenna 510 is located above the horizontal overall height line L1. Here, the horizontal overall height line L1 indicates the maximum height (height of the upper end) of the roof 11 of the tractor 1 in a substantially horizontal position. Moreover, the antenna fixing part 530 and the antenna 510 in the utilization position are arranged so that their longitudinal directions are aligned in the vertical direction.

[0064] As shown in FIG. 6(b), when the antenna fixing part 530 is located at the utilization position, the bolt 534a of the fastening part 534 is engaged with the engagement hole 522b of the support piece part 522. Specifically, the bolt 534a is located at the lower part of the second part 522d of the engagement hole 522b. In this state, the bolt 534a abuts against the front, rear and lower parts of the second part 522d, thereby restricting the movement of the antenna fixing part 530 in the front-rear direction and downward. As a result, even if the fastening by the fastening part 534 loosens due to vibration of the tractor 1 or the like, it is possible to prevent the antenna fixing part 530 at the utilization position from moving unintentionally.

[0065] 8 shows the antenna device 500 with the antenna fixing part 530 in the storage position. In this state, the upper end of the antenna 510 is located below the horizontal overall height line L1. In addition, the antenna fixing part 530 and the antenna 510 in the storage position are arranged so that the longitudinal direction is inclined with respect to the up-down direction. With the antenna fixing part 530 in the storage position, the bolt 534a of the operation part 534b is located at the lower end of the slide hole 522a.

[0066] A method for moving antenna fixing portion 530 between the use position and the storage position will be described below with reference to FIGS.

[0067] First, a method of moving antenna fixing part 530 from the usage position to the storage position will be described. The worker first rotates operation part 534b and loosens operation part 534b from bolt 534a, thereby releasing the fastening of antenna fixing part 530 to mounting part 520. Note that at this time, the worker loosens operation part 534b to an extent that it does not come completely out of bolt 534a. By releasing the fastening, antenna fixing part 530 becomes movable with respect to mounting part 520.

[0068] Next, the worker, while holding the operating portion 534b, moves the fastening portion 534 along the engagement hole 522b to release the engagement of the fastening portion 534 with the support piece portion 522 (see FIG. 6(b)). Specifically, the worker moves the antenna fixing portion 530 so that the bolt 534a located at the lower portion of the second portion 522d moves upward along the second portion 522d. Next, the worker moves the antenna fixing portion 530 upward so as to move the bolt 534a forward along the first portion 522c, and positions the bolt 534a in the slide hole 522a. With the movement of the bolt 534a, the antenna fixing portion 530 rotates counterclockwise in a right side view around the shaft portion 533a of the connecting portion 533 as the rotation center (see FIG. 8).

[0069] By moving antenna fixing part 530 as described above, both shaft part 533a of connecting part 533 and bolt 534a of fastening part 534 are positioned in slide hole 522a, and fastening part 534 is disengaged from support piece part 522. In this state, antenna fixing part 530 becomes slidable up and down along slide hole 522a.

[0070] Next, the worker slides antenna fixing part 530 along slide hole 522a until bolt 534a of fastening part 534 is positioned at the lower end of slide hole 522a (see FIG. 8). Next, the worker rotates operating part 534b of fastening part 534 to fasten antenna fixing part 530 to attachment part 520. This completes the movement of antenna fixing part 530 to the storage position.

[0071] Next, a method of moving the antenna fixing part 530 from the storage position to the usage position will be described. The worker can move the antenna fixing part 530 to the usage position by performing the steps in reverse to the steps of moving the antenna fixing part 530 to the storage position described above.

[0072] Specifically, the worker first rotates the operating portion 534b of the fastening portion 534 to release the fastening of the antenna fixing portion 530 to the attachment portion 520. Next, the worker slides the antenna fixing portion 530 upward along the slide hole 522a, and rotates the antenna fixing portion 530 clockwise as viewed from the right side with the shaft portion 533a of the connecting portion 533 as the rotation center, thereby engaging the fastening portion 534 with the engagement hole 522b. Next, the worker rotates the operating portion 534b of the fastening portion 534 to fasten the antenna fixing portion 530 to the attachment portion 520. This completes the movement of the antenna fixing portion 530 to the usage position.

[0073] The tractor 1 according to this embodiment has been described above. According to this embodiment, the antenna fixing part 530 can be formed to be movable between a usage position and a storage position while being connected to the mounting part 520. This makes it possible to easily change the attitude of the antenna 510 without removing the antenna fixing part 530 from the mounting part 520.

[0074] Furthermore, the position of the antenna 510 of the antenna device 500 can be manually changed without using a tool such as a wrench. The antenna device 500 is arranged so as not to interfere with surrounding components such as the work light 15b, the slow vehicle mark 15c, and the rear hatch 16 in both the use position and the storage position (see FIG. 3).

[0075] The antenna device 500 is provided so that an operator inside the cabin 10 can change the attitude of the antenna fixing part 530 through the opening of the rear hatch 16 with the rear hatch 16 open. As shown in Fig. 7 and Fig. 8, the fastening part 534 of the antenna device 500 is located below the upper end part (rear beam 15) of the opening of the rear hatch 16 in both the utilization position and the storage position. This allows the fastening part 534 to be easily operated from inside the cabin 10 with the rear hatch 16 open, improving the operability of the antenna device 500 when changing the attitude of the antenna 510.

[0076] Although one embodiment of the present disclosure (one aspect of the present disclosure) has been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims.

[0077] Fig. 9 shows another embodiment (modification) of the present disclosure. Unlike the present embodiment (see Figs. 7 and 8 etc.) in which the antenna fixing part 530 is slid relative to the mounting part 520, the antenna device 500A according to this modification employs a configuration in which the antenna fixing part 530A is rotated relative to the mounting part 520A to change the attitude of the antenna 510.

[0078] Antenna device 500A is disposed at the front of roof 11 where there are relatively few surrounding components and where it is easy to ensure space for changing the attitude of antenna 510. More specifically, antenna device 500A is disposed at a right or left corner of the front end portion of roof 11, for example.

[0079] The antenna device 500A is formed so that the antenna fixing part 530 can be rotated between a use position shown in Fig. 9(a) and a storage position shown in Fig. 9(b). The antenna 510 in the use position is arranged so that its longitudinal direction is along the up-down direction. The antenna 510 in the storage position is arranged so that its longitudinal direction is along the front-rear direction. The configuration of the antenna device 500A will be described below with reference to the antenna device 500A in the use position state shown in Fig. 9(a).

[0080] The mounting portion 520A according to the modified example has the antenna fixing portion 530A fixed in the utilization position and the storage position. The mounting portion 520A includes a first mounting portion 523 to which the antenna fixing portion 530A in the utilization position is fixed, and a second mounting portion 524 to which the antenna fixing portion 530A in the storage position is fixed. The first mounting portion 523 and the second mounting portion 524 are provided on the cabin 10 side (for example, the support mechanism 40 or the front pillar 12). The first mounting portion 523 and the second mounting portion 524 are provided with holes 523a and 524a, respectively. The holes 523a and 524a are formed so that a screw portion of a fastening portion 534A described later can be engaged therewith.

[0081] The antenna fixing portion 530A has a first piece 531A to which the antenna 510 is fixed, and a second piece 532A fixed to the mounting portion 520A (first mounting portion 523 and second mounting portion 524). The antenna fixing portion 530A is formed in a substantially L-shape in which the first piece 531A and the second piece 532A are perpendicular to each other in a side view. The second piece 532A is formed with a hole 532Aa penetrating in the front-rear direction. The hole 532Aa overlaps with the hole 523a of the first mounting portion 523 in the utilization position, and overlaps with the hole 524a of the second mounting portion 524 in the storage position.

[0082] A fastening portion 534A is inserted into the hole 532Aa. The fastening portion 534A includes a shaft portion 534Aa having a threaded portion that can be engaged with the hole 523a and the hole 524a, and an operation portion 534Ab that can be manually operated to engage the shaft portion 534Aa with the hole 523a and the hole 524a. A general knob bolt can be used as the fastening portion 534A.

[0083] Antenna fixing portion 530A is provided to be rotatable about a rotation shaft 535 having an axis in the left-right direction as a rotation center. Rotation shaft 535 connects a lower end portion of second piece 532A of antenna fixing portion 530A to the cabin 10 side (for example, support mechanism 40 or front pillar 12).

[0084] As shown in Figure 9(a), the fastening portion 534A inserted into the hole 532Aa of the antenna fixing portion 530A can be engaged with the hole 523a of the first mounting portion 523, thereby fastening the antenna fixing portion 530A positioned in the utilization position to the first mounting portion 523.

[0085] Furthermore, by removing the fastening portion 534A from the first mounting portion 523, the engagement of the antenna fixing portion 530A with the first mounting portion 523 is released, and the antenna fixing portion 530A is allowed to rotate toward the storage position.

[0086] As shown in FIG. 9(b), the antenna fixing part 530A is rotated toward the storage position and the fastening part 534A inserted into the hole 532Aa of the antenna fixing part 530A is engaged with the hole 524a of the second mounting part 524, so that the antenna fixing part 530A positioned in the storage position can be fastened to the second mounting part 524.

[0087] In the above modification, the attitude of antenna 510 can be easily changed in substantially the same manner as in this embodiment (see FIGS. 7 and 8, etc.).

[0088] As described above, the tractor 1 (work vehicle) according to this embodiment has the following features: A tractor 1 equipped with antenna devices 500, 500A capable of communication using an antenna 510, The antenna devices 500 and 500A include: Mounting parts 520, 520A to be attached to the cabin 10 of the tractor 1; an antenna fixing portion 530, 530A connected to the mounting portion 520, 520A so as to be movable between a usage position where the antenna 510 is fixed and where the antenna 510 is supported so as to be positioned above the height of the roof 11 of the cabin 10, and a storage position where the antenna 510 is supported so as to be positioned below the height of the roof 11; It is equipped with the following. This configuration can prevent interference with the antenna 510. Specifically, by positioning the antenna fixing parts 530, 530A at the storage position, it is possible to prevent the antenna 510 from interfering with the ceiling of a container or the like when storing the tractor 1 in a container or the like for transport. In addition, by forming the antenna devices 500, 500A so that the antenna fixing parts 530, 530A can be moved between the utilization position and the storage position while the antenna fixing parts 530 are connected to the mounting parts 520, 520A, it is possible to change the attitude of the antenna 510 without removing the antenna fixing parts 530, 530A from the mounting parts 520, 520A.

[0089] In addition, Tractor 1 is The antenna fixing portion 530, 530A is provided with fastening portions 534, 534A capable of fastening the antenna fixing portion 530, 530A to the mounting portion 520, 520A in each of the state in which the antenna is located at the utilization position and the state in which the antenna is located at the storage position, The fastening portions 534 and 534A are The antenna fixing portions 530 and 530A are configured so that they can be fastened and released by manual operation. With this configuration, the mounting parts 520, 520A and the antenna fixing parts 530, 530A can be manually fastened together using the fastening parts 534, 534A, making it possible to fasten each part together without using a tool such as a wrench.

[0090] In addition, the antenna fixing part 530 is It is connected to the mounting portion 520 so as to be slidable in the up and down direction between the utilization position and the storage position. With this configuration, it is possible to avoid interference between antenna 510 and structures around cabin 10 when changing the attitude of antenna 510.

[0091] In addition, the antenna fixing part 530 is The fastening portion 534 (engagement portion) is provided to engage with the mounting portion 520 when the fastening portion 534 is located at the utilization position. By configuring it in this manner, the antenna fixing part 530 positioned in the utilization position can be engaged with the mounting part 520, thereby preventing the antenna fixing part 530 from unintentionally moving to the storage position in response to vibration of the tractor 1 or the like that releases the fastening of the antenna fixing part 530.

[0092] In addition, the antenna fixing part 530 is When the antenna 510 is positioned at the use position, the longitudinal direction of the antenna 510 is aligned along the vertical direction. When in the stored position, the antenna 510 is disposed so that its longitudinal direction is inclined with respect to the vertical direction. With this configuration, by tilting antenna 510 at the storage position, the vertical sliding distance of antenna fixing part 530 can be made relatively small. Specifically, by tilting antenna 510, the height of antenna 510 at the storage position can be made lower. This makes it possible to reduce the sliding distance of antenna fixing part 530 compared to the case where antenna fixing part 530 is moved to the utilization position and the storage position only by sliding in the vertical direction.

[0093] In addition, by reducing the sliding distance of the antenna fixing portion 530, it becomes easier to avoid interference with surrounding structures. Therefore, as in the above embodiment, the antenna device 500 can be suitably disposed in the rear of the cabin 10 where there are relatively many surrounding structures (such as the work lights 15b, the low-speed vehicle mark 15c, and the rear hatch 16).

[0094] Moreover, the antenna device 500 has It is provided at the rear of the cabin 10, The fastening portion 534 is The antenna fixing portion 530 is located below the opening of the rear hatch 16 of the cabin 10 when it is in the utilization position and when it is in the storage position. Such a configuration can improve the operability of the antenna device 500 from within the cabin 10. Specifically, by forming the fastening portion 534 to be easily operable from within the cabin 10 with the rear hatch 16 open, the operability of the antenna device 500 when changing the attitude of the antenna 510 can be improved.

[0095] In addition, the antenna fixing portion 530A is It is connected to the mounting portion 520A so as to be rotatable between the use position and the storage position. With this configuration, the attitude of antenna 510 can be changed by rotating antenna fixing portion 530A with respect to mounting portion 520A.

[0096] The tractor 1 according to this embodiment is one embodiment of a work vehicle according to the present invention. Moreover, the fastening portion 534 according to this embodiment is one embodiment of an engagement portion according to the present invention.

[0097] Although one embodiment of the present invention has been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims.

[0098] For example, in the antenna device 500 according to the above embodiment, an example has been shown in which the antenna fixing part 530 is provided so as to be rotatable and slidable with respect to the mounting part 520, but the present invention is not limited to this. For example, the antenna fixing part 530 may be formed so as to be movable only by sliding.

[0099] In addition, in the antenna device 500 according to the above embodiment, an example has been shown in which the antenna device 500 is provided on the stay 15a of the rear beam 15, but the present invention is not limited to this. The antenna device 500 may be provided in another location at the rear of the cabin 10, or in the front, left, right, or other part of the cabin 10.

[0100] In addition, in the antenna device 500 according to the above embodiment, an example in which the first antenna 511 and the second antenna 512 are provided as the antenna 510 has been shown, but the present invention is not limited to this. For example, one antenna may be provided as the antenna 510, or three or more antennas may be provided. In addition, the uses and functions of the first antenna 511 and the second antenna 512 are not particularly limited, and can be changed as desired.

[0101] In the above embodiment, the fastening parts 534, 534A are fastened and released by manual operation, but the present invention is not limited to this. For example, the fastening parts 534, 534A may be fastened and released by using a tool.

[0102] Furthermore, the shapes, structures, etc. of each part exemplified in the above embodiment are merely examples, and the configuration of each part can be changed as desired.

[0103] In the above embodiment, the tractor 1 is used as an example of a work vehicle, but the work vehicle is not limited to this. For example, the work vehicle may be other agricultural vehicles, construction vehicles, industrial vehicles, etc. [Explanation of symbols]

[0104] 1 Tractor 500 Antenna Equipment 510 Antenna 520 Mounting part 530 Antenna fixing part

Claims

1. A work vehicle equipped with an antenna device capable of communication using an antenna, The antenna device comprises: A mounting portion that is attached to a cabin of the work vehicle; an antenna fixing portion connected to the mounting portion so as to be movable between a usage position to which the antenna is fixed and which supports the antenna so as to be positioned above a roof height of the cabin and a storage position to which the antenna is supported so as to be positioned below a roof height; A work vehicle equipped with the above.

2. a fastening portion capable of fastening the antenna fixing portion to the attachment portion when the antenna is positioned at the utilization position and when the antenna is positioned at the storage position, The fastening portion is The antenna fixing part is configured to be fastened and released by manual operation. A work vehicle according to claim 1.

3. The antenna fixing portion is The mounting portion is connected to the mounting portion so as to be slidable in the up-down direction between the utilization position and the storage position. A work vehicle according to claim 1.

4. The antenna fixing portion is The device further includes an engagement portion that engages with the mounting portion when the device is positioned at the utilization position. The work vehicle according to claim 2.

5. The antenna fixing portion is When the antenna is positioned at the utilization position, the antenna is disposed so that the longitudinal direction of the antenna is aligned along the up-down direction, When the antenna is in the stored position, the longitudinal direction of the antenna is inclined with respect to the vertical direction. A work vehicle according to claim 4.

6. The antenna device comprises: The cabin is provided at the rear of the cabin. The fastening portion is a rear hatch opening of the cabin being located below the antenna fixing portion when the antenna fixing portion is located at the utilization position and when the antenna fixing portion is located at the storage position; The work vehicle according to claim 2.

7. The antenna fixing portion is The attachment portion is rotatably connected to the use position and the storage position. A work vehicle according to claim 1 or 2.

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