Work vehicles

Abstract

To allow a positioning device to be easily detached from and attached to a work vehicle without using a tool (non-tool).SOLUTION: A work vehicle includes: a vehicle body; a positioning device for detecting the position of the vehicle body based on signals transmitted from positioning satellites; a support structure portion attached to the vehicle body; a mounting stay to which the positioning device is fixed; and a base stay fixed to the support structure portion. One of the mounting stay and the base stay has a projecting piece. The other of the mounting stay and the base stay has a hole portion into which the projecting piece is inserted and locked.SELECTED DRAWING: Figure 8

Description

[Technical field]

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

[0002] Conventionally, a technology has been proposed in which a positioning device that detects the position of the vehicle body is provided above the cabin of a tractor. For example, Patent Document 1 discloses a technology in which a mounting stay on which a positioning device is attached is fixed to a base stay provided on the vehicle body side with a bolt. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-041745 Summary of the Invention [Problem to be solved by the invention]

[0004] In the configuration of Patent Document 1, when attaching or detaching the positioning device to or from the vehicle body, it is necessary to use a tool to loosen or tighten the bolts. This poses a problem that the work of attaching or detaching the positioning device is cumbersome, and there is room for improvement.

[0005] The present invention has been made to solve the above-mentioned problems, and its object is to provide a work vehicle that can easily attach and detach a positioning device without the use of tools (non-tool). [Means for solving the problem]

[0006] A work vehicle according to one aspect of the present invention is a work vehicle comprising a vehicle body and a positioning device that detects the position of the vehicle body based on a signal transmitted from a positioning satellite, and comprises a support structure attached to the vehicle body, a mounting stay to which the positioning device is fixed, and a base stay fixed to the support structure, one of the mounting stay and the base stay having a protrusion portion, and the other of the mounting stay and the base stay having a hole portion into which the protrusion portion is inserted and engaged. Effect of the Invention

[0007] According to the above configuration, the positioning device can be easily attached to and detached from the work vehicle without using tools (without tools). [Brief description of the drawings]

[0008] [Figure 1] 1 is a side view showing a schematic configuration of a tractor that is an example of a work vehicle according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a block diagram of a vehicle driving system including the tractor. [Diagram 3] FIG. 2 is a perspective view of the cabin from above. [Figure 4] FIG. 4 is a perspective view showing a configuration of a support portion. [Diagram 5] 1 is a perspective view of the mounting stay from below before the antenna unit is attached. FIG. [Figure 6] FIG. 4 is a perspective view from below of the mounting stay after the antenna unit has been mounted. [Figure 7] FIG. 2 is a perspective view of the base stay from above. [Figure 8] 10 is a perspective view showing a schematic diagram of a step of fixing the mounting stay, to which the antenna unit is fixed, to the base stay. FIG. [Figure 9] 11 is a cross-sectional view of the mounting stay and the base stay in a state in which the mounting stay is released from gripping. FIG. [Figure 10] 10 is a cross-sectional view showing a schematic diagram of another fixed state between the mounting stay and the base stay. FIG. [Figure 11] FIG. 11 is a cross-sectional view showing a schematic configuration of the mounting stay and the base stay. [Figure 12] FIG. 11 is a perspective view showing another configuration of the base stay as viewed from below. [Figure 13] 4 is a perspective view of the fixing member as viewed obliquely from below. FIG. [Figure 14] 10 is a cross-sectional view showing a state before a second projecting piece portion of the mounting stay is fixed by the fixing member. FIG. [Figure 15] 10 is a cross-sectional view showing a state after the second projecting piece is fixed by the fixing member. FIG. [Figure 16] FIG. 4 is a side view showing another configuration of the tractor. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The following is an explanation of an embodiment of the present invention with reference to the drawings. In this embodiment, a tractor is used as an example of a work vehicle, but other ride-on work vehicles such as rice transplanters, combine harvesters, civil engineering and construction work equipment, and snowplows can also be considered as work vehicles.

[0010] In addition, in this specification, directions are defined as follows. First, the direction in which a tractor, which is a work vehicle, travels during work is defined as "front", and the opposite direction is defined as "rear". Furthermore, the right side of the tractor's travel direction is defined as the right, and the left side is defined as the left. The direction perpendicular to the front-to-rear and left-to-right directions of the tractor is defined as the up-down direction. In this case, the direction of gravity is defined as down, and the opposite side is defined as up. In the drawings, the front direction is indicated as F, the rear direction as B, the left direction as L, the right direction as R, the up direction as U, and the down direction as D, as appropriate.

[0011] [1. Overview of the vehicle driving system] Fig. 1 is a side view showing a schematic configuration of a tractor 1 which is an example of a work vehicle according to the present embodiment. Fig. 2 is a block diagram of a vehicle driving system including the tractor 1.

[0012] As shown in Fig. 2, the vehicle travel system of this embodiment is configured to include a tractor 1, a wireless communication terminal 30, and a reference station 40. The tractor 1 can travel according to the operation of a driver, and can also travel autonomously based on instructions from the wireless communication terminal 30. The wireless communication terminal 30 is a terminal for issuing various instructions to the tractor 1. The reference station 40 is provided to acquire position information of the tractor 1.

[0013] As shown in Fig. 1, the tractor 1 includes a vehicle body 2. A ground work implement (not shown) can be attached to the rear side of the vehicle body 2. Examples of the ground work implement that can be used include, but are not limited to, a cultivator, a plow, and a fertilizer applicator.

[0014] The front part of the vehicle body 2 is supported by a pair of left and right front wheels 3. The rear part of the vehicle body 2 is supported by a pair of left and right rear wheels 4. A bonnet 5 is disposed at the front part of the vehicle body 2. An engine 6 is disposed below the bonnet 5 as a drive source. The engine 6 is formed of, for example, a diesel engine, but is not limited to this and may be formed of, for example, a gasoline engine. Furthermore, in addition to or instead of the engine 6, an electric motor may be used as a drive source.

[0015] A cabin 7 for a driver (operator) to board is provided on the upper part of the vehicle body 2 behind the bonnet 5. A door 7a that pivots to open forward is provided on the left side of the cabin 7. The driver can get in and out of the cabin 7 by opening and closing the door 7a. The door 7a may be provided on the right side of the cabin 7.

[0016] A steering wheel 8 for the driver to steer and a driver's seat 9 for the driver are provided inside the cabin 7. The cabin 7 has a windshield FG (see Figs. 3 and 4) in front of the driver's seat 9. Note that the windshield FG and the door 7a may be omitted.

[0017] A three-point link mechanism is provided on the rear side of the vehicle body 2. The three-point link mechanism includes a pair of left and right lower links 10 and an upper link 11. The above-mentioned ground work machine is configured to be mountable to the three-point link mechanism. Also, a lifting device (not shown) having a hydraulic device such as a lifting cylinder is provided on the rear side of the vehicle body 2. The lifting device raises and lowers the three-point link mechanism, thereby raising and lowering the ground work machine.

[0018] 2, the tractor 1 is provided with a governor device 21 capable of adjusting the rotation speed of the engine 6, and a transmission device 22 that changes the speed of the rotational driving force from the engine 6 and transmits it to the drive wheels. The governor device 21 and the transmission device 22 are controlled by a control unit 23.

[0019] The tractor 1 includes a steering device 24. The steering device 24 is provided, for example, midway along the rotation axis of the steering handle 8, and is configured to be able to adjust the rotation angle (steering angle) of the steering handle 8. By the control unit 23 controlling the steering device 24, the tractor 1 can not only travel straight ahead, but also adjust the rotation angle of the steering handle 8 to a desired angle and turn with a desired turning radius.

[0020] The tractor 1 further includes an antenna unit 50. The antenna unit 50 is a positioning device that detects the position of the vehicle body 2 based on a signal transmitted from a positioning satellite (navigation satellite) 45 shown in FIG.

[0021] The antenna unit 50 and the control unit 23 are electrically connected by a harness WH. This enables various information or instructions to be transmitted between the antenna unit 50 and the control unit 23 via the harness WH. For example, position information of the vehicle body 2 detected by the antenna unit 50 is input to the control unit 23 via the harness WH.

[0022] Next, a detailed description will be given of the above-mentioned antenna unit 50. The antenna unit 50 includes an inertial measurement unit (IMU) 25, a global navigation satellite system (GNSS) antenna 26, a wireless communication unit 27, a wireless communication antenna 28, and a base station antenna 29.

[0023] The inertial measurement unit 25 is equipped with a three-axis gyro sensor and a three-directional accelerometer, thereby detecting three-dimensional angular velocity and acceleration. The detection values ​​of the inertial measurement unit 25 are input to the control unit 23. The control unit 23 can obtain attitude information of the tractor 1 based on the above detection values. The attitude information includes, for example, information on the azimuth angle (yaw angle) of the vehicle, the left and right tilt angle (roll angle) of the vehicle, and the front and rear tilt angle (pitch angle) in the traveling direction of the vehicle.

[0024] The GNSS antenna 26 receives radio signals transmitted from positioning satellites 45 that constitute a satellite positioning system (GNSS). In the satellite positioning system, in addition to the Global Positioning System (GPS; USA), quasi-zenith satellites (Japan), GLONASS satellites (Russia), and the like can be used as positioning satellites.

[0025] The wireless communication unit 27 transmits and receives various signals via a wireless communication network established with the wireless communication terminal 30 and the like. In this embodiment, the wireless communication unit 27 is configured as a Wifi (registered trademark) unit with a frequency band of 2.4 GHz. A signal transmitted from the wireless communication terminal 30 is received by a wireless communication antenna 28 and input to the control unit 23 via the wireless communication unit 27. In addition, a signal from the control unit 23 is transmitted to the wireless communication device 31 of the wireless communication terminal 30 and the like via the wireless communication unit 27 and the wireless communication antenna 28.

[0026] Here, in this embodiment, for example, RTK (Real Time Kinematic) positioning is used as a positioning method using a satellite positioning system. In RTK positioning, a carrier phase (satellite positioning information) from a positioning satellite 45 is measured by both a reference station positioning antenna 42 of a reference station 40 installed at a reference point and a GNSS antenna 26 of the tractor 1 which is a mobile station side for which position information is to be obtained. The reference station 40 generates correction information every time it measures satellite positioning information from the positioning satellite 45 or every time a set period elapses. The correction information is transmitted from the reference station wireless communication device 41 to the base station antenna 29 of the tractor 1. The control unit 23 of the tractor 1 corrects the satellite positioning information measured by the GNSS antenna 26 using the correction information transmitted from the reference station 40 to obtain current position information of the tractor 1. The control unit 23 obtains, for example, latitude information and longitude information as the current position information of the tractor 1.

[0027] The positioning method used is not limited to the above-mentioned RTK positioning, and other positioning methods such as DGPS (differential GPS positioning) may be used. The reference station 40 is capable of transmitting and receiving various information not only to the tractor 1 but also to the wireless communication terminal 30.

[0028] The wireless communication terminal 30 is configured, for example, by a tablet-type personal computer having a touch panel. The wireless communication terminal 30 is provided with a wireless communication device 31 and a route generating unit 32 that generates a target travel route. The route generating unit 32 can generate a target travel route for autonomously traveling the tractor 1 based on various information inputted via the touch panel. The route generating unit 32 is configured, for example, by a CPU (Central Processing Unit) of a personal computer.

[0029] The wireless communication terminal 30 transmits various information for autonomously driving the tractor 1, such as a target driving route, to the tractor 1. The control unit 23 of the tractor 1 obtains the current position information of the tractor 1 from a signal received by the GNSS antenna 26, and obtains displacement information and orientation information of the vehicle body 2 from values ​​detected by the inertial measurement unit 25, and controls the transmission 22, the steering device 24, etc., based on this information. This makes it possible to autonomously drive the tractor 1 along the target driving route generated by the route generation unit 32.

[0030] [2. Antenna unit mounting structure] Next, a structure for mounting the above-mentioned antenna unit 50 to the tractor 1 will be described. Fig. 3 is a perspective view of the cabin 7 of the tractor 1 from above. The tractor 1 includes a support structure 100. The support structure 100 is mounted to the vehicle body 2.

[0031] (2-1.Support structure) The support structure 100 includes the above-mentioned cabin 7 provided on the vehicle body 2 and a support part 101 attached to the cabin 7.

[0032] The cabin 7 includes a roof 70 and a number of pillars. The roof 70 is located above the driver's seat 9 (see FIG. 1). The plurality of pillars are legs that support the roof 70 on the vehicle body 2. The plurality of pillars include pillars that support at least the four corners of the roof 70. FIG. 3 illustrates, of the plurality of pillars, a right front pillar 71R that supports the right corner of the roof 70 and a left front pillar 71L that supports the left corner of the roof 70.

[0033] The support portion 101 includes a support pipe 102, a right stay 103R, and a left stay 103L. The support pipe 102 extends in the left-right direction, and both ends thereof are bent downward. The right stay 103R is fixed to a right front pillar 71R of the cabin 7 by a bolt or the like. The left stay 103L is fixed to a left front pillar 71L of the cabin 7 by a bolt or the like. The right end and the left end of the support pipe 102 are fixed to the right stay 103R and the left stay 103L by a bolt or the like, respectively. As a result, the support pipe 102 is fixed to the right front pillar 71R and the left front pillar 71L via the right stay 103R and the left stay 103L. That is, the support portion 101 is attached to the cabin 7.

[0034] The right stay 103R supports a rearview mirror (not shown) via a right mirror support rod 104R. The left stay 103L supports a work lamp WL and also supports a rearview mirror (not shown) via a left mirror support rod 104L. The right stay 103R may support a work lamp in the same manner as the left stay 103L.

[0035] 4 is a perspective view showing another configuration of the support part 101. The support part 101 may be formed of a support stay 105. The support stay 105 is formed long in the left-right direction, and is directly fixed onto the roof 70 of the cabin 7 by bolts or the like. In this way, the support part 101 is attached to the cabin 7.

[0036] (2-2. Mounting stay) 5 and 6 are perspective views from below of the mounting stay 200. The tractor 1 is equipped with the mounting stay 200. The antenna unit 50 is fixed to the mounting stay 200. Note that FIG. 5 shows the mounting stay 200 before the antenna unit 50 is attached, and FIG. 6 shows the mounting stay 200 after the antenna unit 50 is attached. The mounting stay 200 has a main body portion 201, a first protruding piece portion 202, and a second protruding piece portion 203.

[0037] The main body 201 is formed of, for example, a metal flat plate, and has through holes 201a penetrating in the thickness direction (for example, the up-down direction). That is, the mounting stay 200 has through holes 201a. In Fig. 5, the through holes 201a are provided in three places, two at the left and right rear parts of the main body 201 and one at the center of the front part, but the number of through holes 201a may be one, two, or four or more.

[0038] The antenna unit 50 is positioned on the mounting stay 200, and a bolt 204 (fastening member) shown in FIG. 6 is inserted into the through hole 201a of the mounting stay 200 from below. Then, the bolt 204 is screwed into a nut provided on the housing side of the antenna unit 50. This fixes the bolt 204 and the antenna unit 50, and the antenna unit 50 is fixed to the mounting stay 200. Note that the above-mentioned "screwed" refers to rotating the bolt to couple it with the nut. In this manner, the mounting stay 200 has a main body portion 201 to which the antenna unit 50 is attached.

[0039] It can also be said that the tractor 1 of this embodiment includes a fastening member (for example, bolt 204) that fastens the antenna unit 50 to the mounting stay 200. The bolt 204 is inserted into the through hole 201a and fixed to the antenna unit 50.

[0040] Incidentally, a substantially triangular hole 201b is formed in the center of the main body 201 of the mounting stay 200 for the purpose of reducing the weight of the mounting stay 200, but the hole 201b may be omitted.

[0041] The first protrusion 202 is connected to the rear of the main body 201, and is inclined diagonally downward (at an acute angle) toward the rear. That is, the first protrusion 202 is connected to the main body 201 at an incline with respect to the up-down direction, which is the direction of gravity. In this embodiment, the inclination angle of the first protrusion 202 with respect to the direction of gravity is, for example, 45°, but is not limited to this angle and can be appropriately set within an angle range, for example, greater than 0° and less than 90°.

[0042] The second protrusion 203 is connected to the front of the main body 201, and is inclined diagonally downward (at an acute angle) toward the front. That is, the mounting stay 200 has the second protrusion 203 connected to the main body 201 on the side opposite to the side connected to the first protrusion 202. In this embodiment, the inclination angle of the second protrusion 203 with respect to the direction of gravity is, for example, 45°, but is not limited to this angle and can be appropriately set within an angle range greater than 0° and less than 90°, for example.

[0043] (2-3. Base stay) 7 is a perspective view of the base stay 300 from above. The tractor 1 is equipped with the base stay 300. The base stay 300 is fixed to the support pipe 102 by welding or the like. That is, the base stay 300 is fixed to the support structure 100. Therefore, the base stay 300 is attached to the vehicle body 2 via the support structure 100.

[0044] The base stay 300 has a base portion 301. The base portion 301 is formed, for example, by bending downward the vicinity of the left and right edges of a metal flat plate. The base portion 301 contacts the support pipe 102 at the left and right edge portions bent downward. The base portion 301 has a substantially pentagonal shape when viewed from above, but is not limited to this shape.

[0045] Such a base portion 301 has a hole portion 302 penetrating in the up-down direction. That is, the hole portion 302 is positioned by penetrating an upper surface 301Su and a lower surface 301Sd (see FIG. 9) of the base stay 300 (base portion 301). The hole portion 302 is positioned at the rear of the base stay 300. The hole portion 302 is formed in an elongated shape in the left-right direction, and is formed in a shape that allows the first protruding piece portion 202 of the mounting stay 200 (see FIG. 5, etc.) to be inserted therein.

[0046] The base portion 301 further has an opening 303. The opening 303 is formed in a shape into which the second protruding piece 203 of the mounting stay 200 fits. That is, the base stay 300 has the opening 303 into which the second protruding piece 203 fits. In this embodiment, the opening 303 is located in the front of the base stay 300. The opening 303 is formed as a notch that is open to the front. The opening 303 may be a hole that penetrates in the vertical direction.

[0047] The base portion 301 further has a receiving portion 304. The receiving portion 304 is provided at a position overlapping with the through hole 201a (see FIG. 5) of the mounting stay 200 when viewed from above, when the first projecting piece portion 202 of the mounting stay 200 is inserted into the hole portion 302 of the base stay 300, thereby fixing the mounting stay 200 to the base stay 300. The receiving portion 304 receives a part (e.g., the head portion 204a (see FIG. 9)) of the bolt 204 (see FIG. 6) protruding from the through hole 201a toward the base stay 300 side. That is, the base stay 300 has the receiving portion 304 that receives a part of the fastening member protruding from the through hole 201a toward the base stay 300 side.

[0048] Such receiving portions 304 are provided at two locations on the left and right of the base portion 301 in correspondence with the positions of the two through holes 201a on the left and right of the rear of the mounting stay 200. Each receiving portion 304 is formed as a hole penetrating the base portion 301 in the vertical direction, but may be formed as a recess with a closed lower portion. Particularly, in this embodiment, the receiving portion 304 is formed as an elongated hole that is long in the front-rear direction of the base stay 300. Also, the hole portion 302 and the opening portion 303 are arranged side by side in the front-rear direction of the base stay 300. The hole portion 302 is arranged on the front side of the base stay 300, and the opening portion 303 is arranged on the rear side of the base stay 300.

[0049] An opening 303 is formed at a position corresponding to one through hole 201a in the front part of the mounting stay 200. Therefore, not only the second projecting piece 203 of the mounting stay 200 but also a part of the bolt 204 inserted into the through hole 201a fits into the opening 303. In other words, the opening 303 also functions as a receiving part that receives a part of the bolt 204.

[0050] [3. How to install the antenna unit] Next, a procedure for attaching the antenna unit to the tractor 1 will be described. It is assumed here that the antenna unit 50 has already been fixed to the mounting stay 200 by the bolt 204. It is also assumed that the base stay 300 is fixed to the support pipe 102, and the support pipe 102 is fixed to the right front pillar 71R and the left front pillar 71L via the right stay 103R and the left stay 103L. It is to be noted that even if the base stay 300 is fixed to the support stay 105 (see FIG. 4), the mounting stay 200 can be attached to the base stay 300 by applying the method described below.

[0051] 8 is a perspective view that shows a schematic diagram of one step of fixing the mounting stay 200 to which the antenna unit 50 is fixed to the base stay 300. First, a user (e.g., a driver) holds the mounting stay 200 and lowers the rear part of the mounting stay 200, thereby inserting the first protruding piece 202 of the mounting stay 200 from above into the hole 302 of the base stay 300. Then, with the first protruding piece 202 inserted into the hole 302, the front part of the mounting stay 200 is lowered. This causes the second protruding piece 203 of the mounting stay 200 to enter the opening 303 of the base stay 300. In this state, the user releases the grip of the mounting stay 200.

[0052] 9 is a cross-sectional view of the mounting stay 200 and the base stay 300 in a state where the grip of the mounting stay 200 is released. As described above, the first protruding piece 202 is connected to the rear part of the main body part 201 so as to be inclined with respect to the up-down direction. Therefore, when the grip of the mounting stay 200 is released in a state where the second protruding piece 203 is inserted into the opening 303, the front part of the mounting stay 200 tries to further lower due to the weight of the mounting stay 200, and as a result, the first protruding piece 202 is caught and locked on the edge of the hole part 302. This causes the mounting stay 200 to be fixed to the base stay 300. In other words, the antenna unit 50 fixed to the mounting stay 200 is fixed to the tractor 1.

[0053] On the other hand, when the antenna unit 50 is to be removed from the tractor 1, the front of the mounting stay 200 is lifted. This causes the second protrusion 203 to leave the opening 303, and the first protrusion 202 at the rear of the mounting stay 200 to move down. This releases the engagement between the first protrusion 202 and the hole 302. Then, the mounting stay 200 is moved upward to pull the first protrusion 202 out of the hole 302, thereby releasing the fixation between the mounting stay 200 and the base stay 300. In other words, the antenna unit 50 fixed to the mounting stay 200 is removed from the tractor 1.

[0054] In Fig. 9, when the first protruding piece 202 is locked in the hole 302, the lower surface 201Sd of the mounting stay 200 (particularly the main body part 201) and the upper surface 301Su of the base stay 300 (particularly the base part 301) are separated from each other, but the positional relationship between the mounting stay 200 and the base stay 300 when fixed is not limited to the state shown in Fig. 9. For example, Fig. 10 is a cross-sectional view showing a schematic diagram of another fixed state between the mounting stay 200 and the base stay 300. As shown in the figure, when the first protruding piece 202 is locked in the hole 302, the lower surface 201Sd of the main body part 201 of the mounting stay 200 may be positioned in close contact with the upper surface 301Su of the base stay 301.

[0055] Figure 11 is a cross-sectional view showing a schematic configuration of the mounting stay 200 and the base stay 300. The configuration of the mounting stay 200 and the base stay 300 may be reversed from the configuration shown in Figure 9 etc. The configuration of Figure 11 will be briefly described as follows.

[0056] The base stay 300 has a first protruding piece 305 and a second protruding piece 306. The first protruding piece 305 is connected to the rear of the base part 301 and is inclined obliquely upward (at an acute angle) toward the rear. The second protruding piece 306 is connected to the front of the base part 301 and is inclined obliquely upward (at an acute angle) toward the front.

[0057] The mounting stay 200 has a hole 205 and an opening 206. The hole 205 is located at the rear of the mounting stay 200. The hole 205 is formed long in the left-right direction and is formed in a shape that allows the first protrusion 305 of the base stay 300 to be inserted. The opening 206 is formed in a shape that allows the second protrusion 306 of the base stay 300 to fit in. The opening 206 is located at the front of the mounting stay 200. The opening 206 is formed as a notch that is open to the front. The opening 206 may be a hole that penetrates in the up-down direction.

[0058] Even with such a configuration of the mounting stay 200 and the base stay 300, by inserting the hole 206 of the mounting stay 200 relative to the first protrusion 305 of the base stay 300, the hole 206 and the first protrusion 305 can be engaged by utilizing the weight of the mounting stay 200. Also, by lifting the front part of the mounting stay 200 to relatively separate the opening 206 from the second protrusion 306 and releasing the engagement between the first protrusion 305 and the hole 206, the fixing of the mounting stay 200 and the base stay 300 can be released.

[0059] 4. Effects As described above, in this embodiment, one of the mounting stay 200 and the base stay 300 has a protruding piece (first protruding piece 202 or first protruding piece 305). In addition, the other of the mounting stay 200 and the base stay 300 has a hole (hole 302 or hole 205) into which the protruding piece is inserted and locked.

[0060] For example, when the protruding piece (first protruding piece 202) of the mounting stay 200 is inserted into the hole (hole 302) of the base stay 300 and the protruding piece is engaged with the hole, the mounting stay 200 is fixed to the base stay 300. The antenna unit 50 is fixed to the mounting stay 200. Meanwhile, the base stay 300 is fixed to the vehicle body 2 via the support structure 100. Therefore, the antenna unit 50 is attached to the tractor 1 by fixing the mounting stay 200 to the base stay 300. Also, by releasing the engagement of the protruding piece with the hole and pulling out the protruding piece from the hole, the fixing of the mounting stay 200 to the base stay 300 is released. That is, the antenna unit 50 fixed to the mounting stay 200 is removed from the tractor 1.

[0061] In this way, by inserting and removing the protruding piece into and from the hole, the antenna unit 50 can be attached to and detached from the tractor 1. This allows the antenna unit 50 to be easily attached to and detached from the tractor 1 without using tools (non-tool).

[0062] 5 to 10, the mounting stay 200 has the above-mentioned protrusion (first protrusion 202), and the base stay 300 has the above-mentioned hole (hole 302). In this configuration, the antenna unit 50 can be easily attached to and detached from the tractor 1 by inserting and removing the first protrusion 202 of the mounting stay 200 into and from the hole 302 of the base stay 300.

[0063] The above-mentioned protrusion (first protrusion 202) is engaged with the above-mentioned hole (hole 302) by the weight of the mounting stay 200. In this case, the first protrusion 202 can be easily engaged and fixed in the hole 302 without using any dedicated member for fixing the first protrusion 202 to the hole 302. In addition, the weight of the mounting stay 200 stably engages the first protrusion 202 with the hole 302. This can also suppress rattling of the mounting stay 200 with respect to the base stay 300.

[0064] The protruding piece (first protruding piece 202) of the mounting stay 200 is connected to the main body 201 and is inclined with respect to the up-down direction. The hole (hole 302) of the base stay 300 is positioned penetrating the upper and lower surfaces of the base stay 300. In this configuration, when a user holds the mounting stay 200 and inserts the first protruding piece 202 into the hole 302 of the base stay 300 from above and releases the grip, even if the mounting stay 200 tries to fall down due to its own weight, the first protruding piece 202 is caught and locked in the hole 302. In other words, the weight of the mounting stay 200 can be used to reliably lock the first protruding piece 202 into the hole 302.

[0065] 10, when the first protruding piece portion 202 is locked in the hole portion 302, the lower surface 201Sd of the mounting stay 200 and the upper surface 301Su of the base stay 300 are in close contact with each other. In this case, the fixing of the mounting stay 200 to the base stay 300 can be stabilized by the surface contact between the lower surface 201Sd and the upper surface 301Su.

[0066] The mounting stay 200 further has a second protruding piece 203 in addition to the first protruding piece 202 as the above-mentioned protruding piece. The base stay 300 has an opening 303. The second protruding piece 203 of the mounting stay 200 fits into the opening 303 of the base stay 300, so that the second protruding piece 203 can be positioned relative to the base stay 300. This makes it possible to suppress positional deviation when the mounting stay 200 is fixed to the base stay 300.

[0067] Particularly, in this embodiment, the opening 303 is a notch. In this configuration, the second projecting piece 203 can easily enter the opening 303 by crossing the notched portion of the opening 303. For example, as shown in Figs. 7 and 8, when the front of the base stay 300 is notched to form the opening 303, after the first projecting piece 202 is inserted into the hole 302, the front of the mounting stay 200 is lowered (the mounting stay 200 is rotated), and the second projecting piece 203 can easily enter the opening 303 from the front. This makes it easy to position the mounting stay 200 relative to the base stay 300.

[0068] In this embodiment, the base stay 300 has a receiving portion 304 that receives a part of the bolt 204 as a fastening member. In this configuration, even if a part (e.g., a head 204a) of the bolt 204 fixed to the antenna unit 50 (see Figs. 6 and 8) protrudes from the mounting stay 200 toward the base stay 300 as shown in Figs. 9 and 10, the protruding head 204a enters the receiving portion 304 of the base stay 300. This prevents the head 204a from interfering with the base stay 300. If the interference occurs, the first protruding piece 202 will not come into contact with the edge of the hole 302, and there is a risk that the engagement of the first protruding piece 202 in the hole 302 will be hindered. By avoiding the interference by having the head 204a enter the receiving portion 304, the risk that the engagement will be hindered due to the interference can be reduced.

[0069] Furthermore, when the first protruding piece 202 is locked in the hole 302, a part of the bolt 204 protruding from the mounting stay 200 (e.g., the head 204a) enters the receiving portion 304, so that the lower surface 201Sd and the upper surface 301Su can be brought into surface contact with each other, as shown in Fig. 10. This ensures that the above-mentioned effect of stabilizing the fixation of the mounting stay 200 to the base stay 300 can be obtained.

[0070] 7, the receiving portion 304 is formed as a long hole that is long in the front-rear direction. In this case, as shown in FIG. 8, when the second projecting piece 203 is rotated in a direction approaching the base stay 300 while inserting the first projecting piece 202 of the mounting stay 200 into the hole 302 (when the front part of the base stay 300 is lowered), a part (e.g., the head 204a) of the bolt 204 projecting from the mounting stay 200 toward the base stay 300 moves from the front to the rear and enters the receiving portion 304. As a result, the mounting stay 200 can be smoothly rotated relative to the base stay 300 while avoiding interference between the base stay 300 and the bolt 204, and the first projecting piece 202 can be engaged with the hole 302.

[0071] 3 and 4, the support structure 100 includes a cabin 7 attached to the vehicle body 2, and a support part 101 attached to pillars (right front pillar 71R, left front pillar 71L) of the cabin 7 or to the roof 70. In this configuration, the antenna unit 50 can be easily attached to and detached from the tractor 1 having the cabin 7 (for example, above the roof 70). Note that the support part 101 may be composed of a right stay 103R, a left stay 103L, and a support pipe 102 as shown in FIG. 3. The support part 101 may be composed of a support stay 105 attached directly to the roof 70 as shown in FIG. 4.

[0072] [5. About fixing parts] FIG. 12 is a perspective view from below showing another configuration of the base stay 300. The base stay 300 may be provided with a fixing member 310. The fixing member 310 fixes the mounting stay 200 to the base stay 300 by hooking the second protruding piece portion 203 of the mounting stay 200. Such a fixing member 310 is configured, for example, as a snap lock (draw latch). Details of the fixing member 310 will be described below with reference to FIG. 12 and FIG. 13. FIG. 13 is a perspective view of the fixing member 310 when viewed obliquely from below. Note that the configuration of the fixing member 310 shown below is an example. Therefore, the fixing member 310 is not limited to the configurations of FIG. 12 and FIG. 13, and may have other configurations.

[0073] The fixed member 310 includes a locking rod 311, a pair of left and right support members 312, 312, and a rotating member 313. The locking rod 311 is formed of a small-diameter rod or hollow pipe that is long in the left-right direction.

[0074] Each support member 312 supports the locking bar 311. That is, one support member 312 is positioned on the right side of the locking bar 311 and supports the right end of the locking bar 311. The other support member 312 is positioned on the left side of the locking bar 311 and supports the left end of the locking bar 311. The support members 312 are positioned opposite each other in the left-right direction and sandwich the locking bar 311 from the left and right directions.

[0075] Each of the support members 312 is composed of two arm members (not shown) positioned side by side in the left-right direction. The two arm members are each long and can slide relative to each other. A biasing member 314 such as a spring is positioned around the two arm members. The biasing member 314 is expandable in the longitudinal direction of the two arm members, with one end connected to one arm member and the other end connected to the other arm member. In this configuration, when one arm moves to one side in the longitudinal direction, the biasing member 314 extends or contracts in conjunction with the movement. Then, due to the reaction force (reaction) of the extension or contraction of the biasing member 314, the other arm member also moves in the same direction as the one arm member (to one side in the longitudinal direction). Therefore, the two arm members can be moved in the same direction while the entire support member 312 is given the longitudinal stretchability (flexibility) due to the biasing member 314.

[0076] The rotating member 313 rotates about a fixed shaft P (see FIG. 14) extending in the left-right direction. The rotating member 313 has a hole 313a (see FIG. 14) penetrating in the left-right direction, and the fixed shaft P is inserted into the hole 313a. This allows the rotating member 313 to rotate about the fixed shaft P. The fixed shaft P is fixed to the lower surface 301Sd of the base stay 300 via a connecting member (not shown).

[0077] A grip portion 315 is connected to the end of the rotating member 313 opposite to the end where the hole 313a is formed. Therefore, a user can grip the grip portion 315 and manually rotate the rotating member 313.

[0078] Further, a shaft portion 313b extending in the left-right direction is rotatably inserted through the rotating member 313. An end portion (an end portion of one of the arm members) of each supporting member 312 opposite to the supporting side of the locking rod 311 is rotatably connected to the shaft portion 313b.

[0079] Fig. 14 is a cross-sectional view showing a state before the second protrusion 203 of the mounting stay 200 is fixed by the fixing member 310. Fig. 15 is a cross-sectional view showing a state after the second protrusion 203 is fixed by the fixing member 310. When the fixing member 310 is in the position shown in Fig. 14, the locking rod 311 of the fixing member 310 can be hooked onto the second protrusion 203 of the mounting stay 200.

[0080] After hooking the locking rod 311 on the second protrusion 203, the user grips the gripping portion 315 of the fixed member 310 and rotates it backward. Then, the rotating member 313 rotates counterclockwise in FIG. 14 about the fixed axis P. This rotation pulls the support members 312 connected to the rotating member 313 via the shafts 313b backward. As a result, the locking rod 311 supported by the support members 312 pulls the second protrusion 203 backward.

[0081] 15, when the rotating member 313 is rotated 90° around the fixed axis P from the state in FIG. 14, the pulling of the second protrusion 203 rearward by the locking rod 311 is completed. As a result, the second protrusion 203 is locked and fixed by the fixing member 310 (particularly the locking rod 311).

[0082] In this way, the base stay 300 is provided with a fixing member 310 that hooks and fixes the second protruding piece 203 of the mounting stay 200. When the mounting stay 200 is fixed to the base stay 300, not only is the first protruding piece 202 engaged with the hole 302 as described above, but the second protruding piece 203 is fixed by the fixing member 310. This makes the mounting stay 200 more stable when fixed to the base stay 300. In addition, the mounting stay 200 can be reliably fixed to the base stay 300 by fixing the first protruding piece 202 and the second protruding piece 203 at two locations. This reliably prevents the mounting stay 200 from easily coming off the base stay 300 due to vibrations or the like caused when the tractor 1 is traveling.

[0083] [6. Other configurations of the tractor] FIG. 16 is a side view showing another configuration of the tractor 1. As shown in the figure, the tractor 1 may be configured to have a ROPS (Roll-Over Protection Structure) frame 60. The ROPS frame 60 is a safety frame (guard) provided for the purpose of protecting the driver when the tractor 1 of a type that does not have the above-mentioned roof 70 and pillars supporting the roof 70 rolls over. The ROPS frame 60 is formed, for example, of a hollow frame. The ROPS frame 60 is erected in an inverted U-shape behind the driver's seat 9 in the vehicle body 2. In this case, the support structure 100 attached to the vehicle body 2 may include the ROPS frame 60.

[0084] In this case, as shown in the figure, if the base stay 300 is fixed to the top of the ROP frame 60, the mounting stay 200 to which the antenna unit 50 is fixed can be made detachable from the base stay 300 in the same manner as above. Therefore, the antenna unit 50 can be easily attached and detached even to a tractor 1 that does not have a roof 70 and pillars.

[0085] Although the embodiment of the present invention has been described above, the scope of the present invention is not limited to this, and the invention can be expanded or modified without departing from the spirit of the invention. [Industrial Applicability]

[0086] The present invention can be used in work vehicles such as tractors. [Explanation of symbols]

[0087] 1 Tractor (work vehicle) 2. Body 7 Cabin 45 Positioning Satellites 70 Roof 71R Right front pillar 71L Left front pillar 45 Positioning Satellites 50 Antenna unit (positioning device) 60 Rops Frame 100 Support structure 101 Support part 200 Mounting stay 201 Main body 201a Through hole 201Sd bottom side 202 1st protruding piece (protruding piece) 203 Second projecting piece 204 Bolts (fastening members) 300 Base Stay 301Su top 301Sd bottom side 302 Hole 303 Opening 304 Acceptance Department 310 Fixing member

Claims

1. The car body and A work vehicle including a positioning device that detects a position of the vehicle body based on a signal transmitted from a positioning satellite, A support structure attached to the vehicle body; a mounting stay to which the positioning device is fixed; A base stay fixed to the support structure, Either the mounting stay or the base stay has a protruding piece portion, The other of the mounting stay and the base stay, excluding the one stay, has a hole portion into which the protruding piece is inserted and engaged.

2. The mounting stay has the protruding piece, The work vehicle according to claim 1 , wherein the base stay has the hole.

3. The work vehicle according to claim 2 , wherein the protruding piece is engaged with the hole by a weight of the mounting stay.

4. The mounting stay further includes a main body to which the positioning device is attached, The protruding piece is connected to the main body at an angle with respect to the direction of gravity, The work vehicle according to claim 3 , wherein the hole is positioned so as to penetrate through an upper surface and a lower surface of the base stay.

5. The work vehicle according to claim 4 , wherein when the protruding piece is engaged in the hole, a lower surface of the main body is positioned in close contact with an upper surface of the base stay.

6. When the protruding piece is a first protruding piece, The mounting stay further includes a second protruding piece, The second protruding piece is connected to the main body of the mounting stay on a side opposite to a side connected to the first protruding piece, The work vehicle according to claim 4 or 5, wherein the base stay has an opening into which the second projecting piece portion fits.

7. The work vehicle according to claim 6 , wherein the opening is a notch.

8. The work vehicle according to claim 6 or 7, wherein the base stay is provided with a fixing member for hooking and fixing the second protruding piece.

9. A fastening member for fastening the positioning device to the mounting stay is further provided, The mounting stay has a through hole, The fastening member is inserted into the through hole of the mounting stay and fixed to the positioning device, The work vehicle according to claim 6 , wherein the base stay has a receiving portion that receives a part of the fastening member that protrudes from the through hole toward the base stay.

10. The hole is located at a rear portion of the base stay, The opening is located at a front portion of the base stay, The work vehicle according to claim 9 , wherein the receiving portion is an elongated hole that is long in the front-rear direction of the base stay.

11. The support structure includes: A cabin provided in the vehicle body; The work vehicle according to claim 1 , further comprising: a support portion attached to a pillar or a roof of the cabin.

12. 11. The work vehicle according to claim 1, wherein the support structure includes a rope frame that is erected behind a driver's seat on the vehicle body.

Images