High-place electrical component attaching / detaching fixture for work vehicle and work machine

Abstract

To provide a high-place electrical component attaching / detaching fixture for a work vehicle, which can easily attach / detach an electrical component to / from the high-place position of the work vehicle.SOLUTION: This high-place electrical component attaching / detaching fixture comprises: a support pillar erected so as to vertically extend in a state where it is installed at a fixed or roughly fixed reference position relative to the work vehicle; an arm body extending in a direction orthogonal to the longitudinal direction of the support pillar and movable along the support pillar; and a holding mechanism capable of holding an electrical component body electrically and physically connectable to an electrical component base fixed to the high-place position of the work vehicle in a connection direction along a virtual plane orthogonal to a vertical direction and supported by the arm. The holding mechanism is configured to be movable along the virtual plane in a state where at least the arm body is raised and to be changeable to a connection position where the held electrical component body and the electrical component base are connected and a release position where the connection between the held electrical component body and the electrical component base is released.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a tool for attaching and detaching electrical equipment at a high altitude on a work vehicle, for attaching and detaching electrical equipment at a high altitude on the work vehicle, and to a work machine equipped with the tool. [Background technology]

[0002] Conventionally, various types of work vehicles for agricultural use, construction use, etc. have been provided. These work vehicles are sometimes equipped with electrical equipment at high locations. Specifically, electrical equipment such as a GPS antenna for positioning, a pole antenna for communication, and lighting devices (headlights and floodlights) are attached to high locations of the work vehicle (for example, above the roof of the cabin that covers the driver's seat) depending on the purpose and function of the work vehicle (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-114925 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, from the standpoint of preventing theft and protecting the vehicle from the external environment, when the vehicle is not in use, it is stored in a roofed building (storage location) such as a warehouse, garage, or shed.

[0005] However, if electrical equipment is attached to a high position on the work vehicle as described above, the electrical equipment will interfere with the entrance and exit of the building. In other words, if the electrical equipment attached to the work vehicle is located at a high position that exceeds the height limit of the building entrance and exit, the work vehicle cannot pass through the building entrance and exit, and the work vehicle cannot be moved in or out of the building. Therefore, when moving the work vehicle in or out of the building (when the work vehicle passes through the building entrance and exit), it is necessary to remove the electrical equipment in advance, but since most work vehicles are large, it is necessary to access the high position using a ladder or stepladder. Therefore, the work of attaching and detaching electrical equipment at a high position on the work vehicle is complicated and dangerous.

[0006] SUMMARY OF THE PRESENT EMBODIMENTS An object of the present invention is to provide a tool for attaching and detaching electrical equipment at high altitudes for a work vehicle, and a work machine, which can easily attach and detach electrical equipment at high altitudes on the work vehicle. [Means for solving the problem]

[0007] The high-altitude electrical equipment mounting / removal jig for a work vehicle of the present invention comprises a support pillar that extends in the vertical direction and is installed at a reference position with a fixed or approximately fixed positional relationship with the work vehicle, an arm body that extends in a direction perpendicular to the longitudinal direction of the support pillar and is movable along the support pillar, and a holding mechanism supported by the arm that can hold an electrical equipment main body that can be electrically and physically connected to an electrical equipment base fixed at a high position on the work vehicle in a connection direction along a virtual horizontal plane perpendicular to the vertical direction, the holding mechanism being configured to be movable along the virtual horizontal plane at least when the arm body is raised, and is configured to be repositionable between a connection position where the held electrical equipment main body and the electrical equipment base are connected, and a release position where the connection between the held electrical equipment main body and the electrical equipment base is released.

[0008] The arm body may have a base end rotatable about an axis extending in the vertical direction, and a tip end opposite the base end, and the holding mechanism may be moved along the virtual horizontal plane by rotation about the axis.

[0009] The arm may rotate around the upright support column.

[0010] The jig for mounting and dismounting electrical equipment at elevated positions for a work vehicle may further include a lifting device for raising and lowering the arm body between a raised position and a lowered position.

[0011] The high-altitude electrical equipment installation and removal jig for a work vehicle may include a support means for supporting the pillar at the reference position, at least the lower end side of the pillar being formed cylindrically, and the support means may be configured to rotatably support at least the lower end side of the pillar.

[0012] The support means may be arranged at a lateral position of the work vehicle.

[0013] The support means may include a first support connected to the work vehicle, the first support receiving a lower end of the upright pillar, and a second support connected to the work vehicle, the second support being installed at a distance in the vertical direction from the first support and supporting a side above the lower end of the upright pillar.

[0014] The first support may have a conical or frustum-shaped support base that is inserted into an inner hole at the lower end of the pillar, and the second support may be configured to surround the pillar while the pillar is rotatable.

[0015] The holding mechanism may be configured so that at least one of its attitude and position can be changed in accordance with the connection between the electrical equipment body and the electrical equipment base.

[0016] The work machine according to the present invention comprises a work vehicle and any of the above-mentioned high-altitude electrical equipment mounting and dismounting jigs for the work vehicle, and the support pillar is supported by the work vehicle in a state where it is installed at the reference position. Effect of the Invention

[0017] According to the present invention, it is possible to obtain an excellent effect that electrical equipment can be easily attached and detached at a high position on a work vehicle. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a side view of a working machine according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a plan view of the working machine according to the embodiment. [Diagram 3] FIG. 3 is a schematic enlarged view of a high position of a work vehicle in the work machine according to the embodiment. [Figure 4] FIG. 4 is a perspective view of electrical equipment mounted at a high position on the work vehicle. [Diagram 5] FIG. 5 is an exploded perspective view of electrical equipment mounted at a high position on the work vehicle. [Figure 6] FIG. 6 is a side view including a partial cross section of electrical equipment mounted at a high position on the work vehicle. [Figure 7] FIG. 7 is a side view including a partial cross section of electrical equipment mounted at a high position on the work vehicle. [Figure 8] FIG. 8 is a side view of the high-place electrical equipment mounting / removal jig for a work vehicle according to the embodiment, showing the state in which the jig is supported by the work vehicle. [Figure 9] FIG. 9 is a front view of the high-place electrical equipment mounting / removal jig for a work vehicle according to the embodiment. [Figure 10] FIG. 10 is a plan view of the holding mechanism of the high-place electrical equipment mounting / removal jig for a work vehicle according to the embodiment, showing a state when an electrical equipment (electrical equipment main body) is being removed. [Figure 11] FIG. 11 is a plan view of the holding mechanism of the high-place electrical equipment mounting / removal jig for the work vehicle according to the embodiment, showing the state when mounting an electrical equipment (electrical equipment main body). [Figure 12] FIG. 12 is a cross-sectional view of a support means (first support) of the high-place electrical equipment mounting / removal jig for a work vehicle according to the embodiment. [Figure 13]FIG. 13 is a plan sectional view of the support means (second support body) of the high-place electrical equipment mounting / removal jig for a work vehicle according to the embodiment. [Figure 14] FIG. 14 is an explanatory diagram of the operation of the jig for attaching and detaching high-place electrical equipment for a work vehicle according to the embodiment. [Figure 15] FIG. 15 is an explanatory diagram of the operation of the jig for attaching and detaching high-place electrical equipment for a work vehicle according to the embodiment. [Figure 16] FIG. 16 is a plan view of the holding mechanism of the high-place electrical equipment mounting / removal jig for a work vehicle according to the embodiment, showing a state in which an electrical equipment (electrical equipment main body) is held. [Figure 17] FIG. 17 is a schematic side view of the holding mechanism of the high-place electrical equipment mounting / removal jig for a work vehicle according to the embodiment, showing a state in which an electrical equipment (electrical equipment main body) is held. [Figure 18] FIG. 18 is a schematic plan view of a holding mechanism of a jig for attaching and detaching high-place electrical equipment for a work vehicle according to another embodiment of the present invention. [Figure 19] FIG. 19 is a schematic plan view including a holding mechanism and its vicinity of a jig for mounting and removing high-placed electrical equipment for a work vehicle according to another embodiment of the present invention. [Figure 20] FIG. 20 is a front view, with a portion thereof omitted, of a jig for attaching and detaching high-placed electrical equipment for a work vehicle according to still another embodiment of the present invention. [Figure 21] FIG. 21 is a front view, with a portion thereof omitted, of a jig for mounting and removing high-placed electrical equipment for a work vehicle according to still another embodiment of the present invention. [Figure 22] FIG. 22 is a partially enlarged cross-sectional view of an electrical component according to still another embodiment of the present invention, showing a mechanism for connecting an electrical component base and an electrical component main body. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0020] As shown in FIGS. 1 and 2, a work machine 1 according to this embodiment includes a work vehicle 2 and a high-place electrical equipment mounting and detaching jig 3 for the work vehicle 2 (hereinafter simply referred to as the mounting and detaching jig).

[0021] As shown in Fig. 1, the work vehicle 2 includes a body frame 20, a traveling device 21 that supports the body frame 20 so that the vehicle can travel, and a prime mover 22 that drives the traveling device 21. The work vehicle 2 further includes an operation unit 23 that operates the work vehicle 2, a driver's seat 24 in which an operator (driver) who operates the operation unit 23 is seated, and a cabin 25 that houses the operation unit 23 and the driver's seat 24. In this embodiment, the work vehicle 2 is an agricultural tractor. Accordingly, the work vehicle 2 includes a three-point linkage mechanism that connects the work device.

[0022] The vehicle body frame 20 is composed of a transmission case that houses a drive transmission mechanism that transmits the drive of the prime mover 22. The vehicle body frame (transmission case) 20 includes a plurality of cases 20a, 20b, 20c, and 20d. The plurality of cases 20a, 20b, 20c, and 20d are connected to each other in a row. The prime mover 22 is connected to one end of the transmission case 20 (the case 20a at the end of the plurality of cases 20a, 20b, 20c, and 20d). Accordingly, the transmission case 20 houses therein a power transmission mechanism of a traveling system that transmits the power of the prime mover 22 to the traveling device 21, and a power transmission mechanism of a working system that transmits the power of the prime mover 22 to a power take-off shaft (PTO shaft).

[0023] The traveling device 21 includes a plurality of wheels 210F, 210R. Specifically, as shown in Fig. 1 and Fig. 2, the traveling device 21 has a pair of wheels 210F, 210F, 210R, 210R at the front and rear, respectively. That is, the traveling device 21 includes a pair of front wheels 210F, 210F provided on the left and right sides of the front of the vehicle body, and a pair of rear wheels 210R, 210R provided on the left and right sides of the rear of the vehicle body, and at least the pair of rear wheels 210R, 210R are driven by the prime mover 22.

[0024] Returning to Fig. 1, the prime mover 22 is a diesel engine. The prime mover 22 is disposed in front of the vehicle body frame 20 in the forward direction of the work vehicle 2. That is, the prime mover 22 is disposed at the front in the forward direction when viewed as a whole of the work vehicle 2. The prime mover 22 is covered by a bonnet 220. That is, the work vehicle 2 is provided with a bonnet 220 that defines a space, and the prime mover 22 is housed within the space defined by the bonnet 220.

[0025] The operation unit 23 is disposed rearward of the prime mover 22 (bonnet 220). The operation unit 23 includes a handle (steering wheel) for steering the front wheels. The operation unit 23 also includes an operation means for operating the three-point linkage mechanism. The driver's seat 24 is disposed rearward of the operation unit 23.

[0026] The cabin 25 defines a space for accommodating the operating unit 23 and the driver's seat 24 on the rear side of the body frame 20 in the forward direction of the work vehicle 2. That is, the cabin 25 is disposed on the rear side with respect to the prime mover 22 (bonnet 220), and accommodates the operating unit 23 and the driver's seat 24.

[0027] More specifically, the cabin 25 includes a roof 250 and support parts (pillars) 251, 251, 252, 252 supporting the four corners of the roof 250 at the left, right, front and rear. A windshield 253 is disposed in a front open part defined by a pair of support parts (a pair of front pillars) 251, 251 at the front and the roof 250, and a rear glass 254 is disposed in a rear open part defined by a pair of support parts (rear pillars) 252, 252 at the rear and the roof 250.

[0028] On each of the left and right sides, a boarding / alighting door 255 is arranged in a side opening defined by a pair of front and rear support parts (front pillar 251, rear pillar 252) and the roof 250. That is, the side opening parts on both the left and right sides of the cabin 25 constitute a boarding / alighting opening 255a through which the operator gets on and off, and the boarding / alighting door 255 for opening and closing the boarding / alighting opening 255a is installed. In this embodiment, the cabin 25 has a rear side glass 256 arranged behind the boarding / alighting opening 255a (boarding / alighting door 255).

[0029] The three-point link mechanism is attached to the rear end portion of the body frame 20. The three-point link mechanism is configured to be capable of swinging up and down.

[0030] 1 to 3, the work vehicle 2 of this embodiment has a roof bar 26 disposed above the roof 250. Specifically, the roof bar 26 is disposed above the front portion of the roof 250 of the work vehicle 2, extending in a lateral direction perpendicular to the front-rear direction.

[0031] The roof bar 26 is for mounting the electrical equipment 4, 5, 6, extends in a direction perpendicular to the front-rear direction (left-right direction), and both ends are directly or indirectly supported by the cabin 25. In this embodiment, the roof bars 26 are arranged in a pair at a distance in the front-rear direction. The heights of the pair of roof bars 26, 26 are set to be the same or approximately the same. That is, the pair of roof bars 26, 26 are arranged side by side in the front-rear direction with the same height level. Of the pair of roof bars 26, 26, both ends in the lateral direction of one roof bar 26 are bent toward the other roof bar 26 and joined to the other roof bar 26. In this embodiment, both ends in the lateral direction of the roof bar 26 arranged on the rear side in the front-rear direction are bent toward the roof bar 26 arranged on the front side in the front-rear direction and joined to the front roof bar 26.

[0032] In this embodiment, side mirrors 27 are attached to both lateral sides (left and right sides) of the cabin 25, and the roof bar 26 is fixed to attachment portions (attachment stays) 270 of the side mirrors 27 relative to the cabin 25.

[0033] In this embodiment, as shown in FIG. 3, the roof bar 26 is provided with electrical equipment 4, 5, 6, such as a GPS antenna 4 for positioning, a floodlight 5, and a pole antenna 6 for communication.

[0034] Of these electrical components 4, 5, and 6, floodlights 5 are provided as a pair with a gap between them on the left and right of roof bar 26, but are located in front of roof bar 26 and therefore are disposed within the height limit of a typical building entrance. A pole antenna 6 for communication is attached to the end of roof bar 26. Accordingly, an operator can access pole antenna 6 from entrance 255a of cabin 25, and can remove it from entrance 255a if the height limit of the building entrance is exceeded.

[0035] In contrast, the GPS antenna 4 is disposed in the center of the roof bar 26 and above the roof bar 26. Therefore, the GPS antenna 4 protrudes upward from the roof bar 26 and is located above the upper surface of the roof 250 of the cabin 25. Therefore, in this embodiment, the upper surface of the GPS antenna 4 is the maximum ground clearance of the work vehicle 2, which may exceed the height limit for the entrance to a typical building.

[0036] However, since the GPS antenna 4 is disposed in the center of the roof bar 26, it is not in a position that the operator can access (within reach of the hand) from the entrance 255a, unlike the pole antenna 6. In particular, as the work vehicle 2 becomes larger, the vehicle width becomes wider and the vehicle height becomes higher, so that the range that the operator can access from the entrance 255a is limited, not just to the center of the roof 250 (roof bar 26).

[0037] Accordingly, the work machine 1 according to this embodiment is provided with an attachment / detachment tool 3 for attaching and detaching electrical equipment 4, 5, 6 that is installed at a high position where the operator cannot access it without using a stepladder, or where the operator cannot access it even using a stepladder due to the presence of a bonnet 220 or the like.

[0038] As described above, there are multiple electrical components 4, 5, 6 that can be attached to the roof bar 26, such as the floodlight 5 and the pole antenna 6. However, in this embodiment, the only electrical component 4 that exceeds the height limit of the building entrance and is in a position that cannot be accessed from the boarding / alighting entrance 255a is the GPS antenna 4, and therefore only the GPS antenna 4 is the target for attachment and detachment using the attachment / detachment jig 3.

[0039] Here, the configuration of the electrical equipment 4 (in this embodiment, the GPS antenna 4) that is attached and detached by the attachment / detachment jig 3 will be described.

[0040] 4 and 5, the electrical equipment 4 to be attached and detached by the attachment and detachment jig 3 includes an electrical equipment base 40 fixed to the center of the roof bar 26, and an electrical equipment main body 41 that is detachable from the electrical equipment base 40. That is, the electrical equipment 4 includes the electrical equipment base 40 disposed on the roof bar 26, and the electrical equipment main body 41 disposed in a superimposed state on the electrical equipment base 40. As a result, the electrical equipment 4 is divided into two parts, an upper part and a lower part, and the height can be reduced (within the entrance restrictions of the building) by removing the electrical equipment main body 41 from the electrical equipment base 40.

[0041] The electrical component base 40 is disposed on the roof bar 26, firmly attached to the roof bar 26 via mounting brackets 42 (see FIGS. 6 and 7), and electrically connected to a control unit that controls the work vehicle 2 and a power source provided in the work vehicle 2. In other words, wiring from the control unit and the power source is introduced into the electrical component base 40.

[0042] More specifically, as shown in Figures 5 to 7, the electrical equipment base 40 is a main body portion 400 that is placed on the roof bar 26, and has a tip end and a base end in the fore-and-aft direction, and a connection portion 401 that hangs down from the tip end of the main body portion 400.

[0043] The main body 400 has a planar upper surface S1 and a planar lower surface S2. In the main body 400, the upper surface S1 and the lower surface S2 are in a front-back relationship and are parallel to each other. The lower surface S2 of the main body 400 contacts the roof bar 26. In this embodiment, since there is a pair of roof bars 26, the size of the main body 400 is set so that it can be disposed across the pair of roof bars 26, 26.

[0044] 5 and 6, the main body 400 is formed with a groove 402 that opens at the top surface S1. The groove 402 extends in the front-rear direction. Accordingly, the groove 402 has one end on the front side in the front-rear direction and the other end opposite the one end, which is on the rear side in the front-rear direction. One end of the groove 402 opens toward the front. In other words, one end of the groove 402 constitutes an open end that opens at a tip surface on the front side of the main body 400.

[0045] In this embodiment, the groove 402 has a straight portion 402a extending straight from the other end to one end, the straight portion 402a having a constant or approximately constant width in a direction perpendicular to the front-rear direction, and an enlarged portion 402b whose width in the direction perpendicular to the front-rear direction increases from the other end to the one end, the enlarged portion 402b being formed from the straight portion 402a to the one end. Accordingly, the enlarged portion 402b includes an open end that opens at a tip surface on the front side of the main body 400 in the front-rear direction.

[0046] The main body 400 has a locking piece 403 for preventing the electrical equipment main body 41 from floating up. The locking piece 403 is disposed corresponding to the other end of the groove 402. That is, the locking piece 403 is disposed at a distance in the up-down direction from the bottom surface of the other end of the groove 402. Accordingly, the locking piece 403 is disposed so as to close a portion of the other end of the groove 402 that is open on the upper surface S1 of the main body 400.

[0047] As described above, the connection part 401 is configured to be physically and electrically connectable to the electrical equipment main body 41. Specifically, as shown in Fig. 5 to Fig. 7, the connection part 401 has a first connection part 404 that can be electrically connected to the electrical equipment main body 41 and a second connection part 405 that can be physically connected to the electrical equipment main body 41.

[0048] The first connecting portion 404 faces forward in the front-rear direction. In this embodiment, the first connecting portion 404 is formed recessed rearward in the front-rear direction from the surrounding area (the second connecting portion 405). That is, the first connecting portion 404 has a first connecting surface SJ1 facing forward at a position recessed in the front-rear direction from the tip surface of the main body portion 400.

[0049] 5 and 6, the first connection portion 404 has primary contacts 406 exposed on the first connection surface SJ1 and connected to wiring from the control unit and the power source. Wires connected to the primary contacts 406 include a power line (electrical power line), a serial line, a CAN line, a signal line, and the like. Accordingly, the first connection portion 404 has a number of primary contacts 406... corresponding to the number of wires from the control unit, the power source, and the like. The multiple primary contacts 406... are aligned and arranged on the first connection surface SJ1 and are electrically connected to the wiring within the connection portion 401.

[0050] As shown in Figs. 5 and 7, the second connection portion 405 has a second connection surface SJ2 facing forward in the front-rear direction. In this embodiment, the second connection portion 405 (second connection surface SJ2) is provided at two locations spaced apart in a direction perpendicular to the front-rear direction. The second connection surface SJ2) is disposed on both sides of the first connection part 404 in the lateral direction perpendicular to the front-rear direction. The second connection part 405 attracts the electrical equipment main body 41 by magnetic force. That is, a magnet 407 is disposed on the second connection surface SJ2 of the second connection part 405.

[0051] As shown in FIGS. 6 and 7, mounting brackets 42 for fixing to the roof bar 26 are attached to the lower surface of the electrical component base 40 (the lower surface S2 of the main body portion 400 and the lower surface of the connection portion 401).

[0052] The mounting bracket 42 is made by bending a plate material and is disposed so as to face the pair of roof bars 26, 26 from below. That is, the mounting bracket 42 has an enclosing portion 420 that is curved in the front-rear direction and protrudes downward so as to surround the pair of roof bars 26, 26 from below, a first connecting portion 421 that extends from one end of the enclosing portion 420 in the front-rear direction and runs along the lower surface S2 of the main body portion 400, and a second connecting portion 422 that extends from the other end of the enclosing portion 420 in the front-rear direction and runs along the lower surface of the connecting portion 401. Each of the first connecting portion 421 and the second connecting portion 422 is fixed to the lower surface of the main body portion 400 via a screw member. As a result, the entire electrical component base 40 is firmly fixed to the roof bar 26.

[0053] In this embodiment, since the electrical equipment 4 that is the object of attachment and detachment is the GPS antenna 4, the electrical equipment body 41 is provided with an antenna unit U including a receiver and the like that receives positioning data from a positioning satellite.

[0054] Specifically, the electrical equipment main body 41 has a unit case portion 410 that overlaps the main body portion 400 of the electrical equipment base 40 from above, and a connected portion 411 that hangs down from the front end of the unit case portion 410 in the front-to-rear direction.

[0055] 6, the unit case part 410 has a downwardly facing installation surface S3. The installation surface S3 is a surface that overlaps with the upper surface S1 of the main body part 400 of the electrical equipment base 40. The electrical equipment main body 41 has a locking claw 412 connected to the installation surface S3 of the unit case part 410, which can be locked with the locking piece 403 of the electrical equipment base 40, and a positioning protrusion 413 connected to the installation surface S3 of the unit case part 410, which performs relative positioning with the electrical equipment base 40 in the lateral direction perpendicular to the up-down direction and the front-rear direction.

[0056] The locking claw 412 is sized so that it can be inserted (loosely inserted) into the groove 402 of the main body 400 of the electrical equipment base 40. In other words, the locking claw 412 is sized so that it can move within the groove 402 in the front-rear direction. The locking claw 412 protrudes from the front side to the rear side in the front-rear direction. This allows the locking claw 412 to be inserted between the locking piece 403 and the bottom of the groove 402.

[0057] The positioning protrusion 413 is sized so as to be insertable (loosely inserted) into the groove 402 of the main body 400 of the electrical equipment base 40. In other words, the positioning protrusion 413 is sized so as to be movable within the groove 402 in the front-rear direction.

[0058] The electrical equipment 4 is formed so as to be able to be held by a holding mechanism 32 (see Figs. 10 and 11) described later. In this embodiment, held portions 414 for holding by the holding mechanism 32 are formed on both side surfaces of the unit case part 410 in a direction perpendicular to the front-rear direction. The held portions 414 are recessed portions. Specifically, the held portions 414 are formed by recessed portions extending in the front-rear direction.

[0059] The connected portion 411 is formed corresponding to the connecting portion 401. That is, the connected portion 411 is As shown in FIGS. 6 and 7, it has a first connected portion 415 corresponding to the first connecting portion 404 and a second connected portion 416 corresponding to the second connecting portion 405.

[0060] Accordingly, the first connected portion 415 has a first connected surface SJ3 corresponding to the first connecting surface SJ1 (see FIG. 6), and the second connected portion 416 has a second connected surface SJ4 corresponding to the second connecting surface SJ2 (see FIG. 7).

[0061] Since the first connecting portion 404 is disposed at a position recessed rearward from the periphery, the first connected portion 415 protrudes rearward in the front-to-rear direction from the periphery (the second connected portion 416) as shown in Fig. 6. This allows the first connecting surface SJ1 and the first connected surface SJ3 to be in surface contact with each other.

[0062] The first connected part 415 has secondary contacts 417 exposed on the first connected surface SJ3, which are connected to wiring from the antenna unit U. Examples of wiring that connect to the antenna unit U include a power line (electrical power line), a serial line, a CAN line, and a signal line. Accordingly, the first connected part 415 has a number of secondary contacts 417... corresponding to the number of wiring from the control part and the power supply part. The multiple secondary contacts 417... are aligned and arranged on the first connected surface SJ3, and are electrically connected to the wiring inside the first connected part 415 (connected part 411).

[0063] In the first connected portion 415, each of the multiple secondary contacts 417... is provided so as to be movable in the front-rear direction, and can be switched between a state in which it protrudes from the first connected surface SJ3 and a state in which it is flush with the first connected surface SJ3. The first connected portion 415 also includes a biasing means (spring) for biasing the multiple secondary contacts 417... toward the rear side, and in a state in which the electrical equipment main body 41 is detached from the electrical equipment base 40, the biasing means biases the secondary contacts 417, causing the secondary contacts 417 to protrude from the first connected surface SJ3. Needless to say, the primary contacts 406... and the secondary contacts 417 are arranged so that the wiring from the control unit and the power source and the wiring from the antenna unit U correspond to each other.

[0064] 7, the second connected portion 416 has a second connected surface SJ4 facing rearward in the front-rear direction. The second connected surface SJ4 faces the second connecting surface SJ2. As described above, since the second connecting portion 405 is provided at two locations spaced apart in the direction perpendicular to the front-rear direction, the second connected portion 416 is also provided at two locations spaced apart in the direction perpendicular to the front-rear direction. That is, the second connected portions 416 are disposed on both sides of the first connected portion 415 in the lateral direction perpendicular to the front-rear direction.

[0065] The second connected portion 416 is configured to be physically connectable to the second connecting portion 405. In this embodiment, the second connecting portion 405 (second connecting surface SJ2) is configured to attract the electrical equipment main body 41 by magnetic force, so that a magnetic body is arranged on the second connected portion 416 (second connecting surface SJ2). In this embodiment, a magnetic metal body 418 is arranged. In this embodiment, the metal body 418 is formed in a plate shape and is attached to the second connected portion 416 so as to be flush with the second connected surface SJ4. Needless to say, a magnet may be arranged on the second connected portion 416 instead of the metal body 418. In this case, the polarity of the magnet arranged on the second connected portion 416 is arranged to be opposite to the polarity of the magnet 407 arranged on the second connecting portion 405 and faces the second connecting portion 405 side (rear side) so that the magnet can be attracted to the magnet 407 of the second connecting portion 405.

[0066] With the above configuration, the electrical equipment body 41 is connected to the electrical equipment base 40 in a direction along a virtual horizontal plane perpendicular to the up-down direction, and is configured to be electrically and physically connectable to the electrical equipment base 40 by approaching or contacting the electrical equipment base 40 from the connection direction. In the electrical equipment main body 41, the connection direction to the electrical equipment base 40 is the front-rear direction, which is a direction along a virtual horizontal plane perpendicular to the up-down direction, but connection is possible from a direction including a front-rear component as well as a linear front-rear direction perpendicular to the up-down direction (vertical direction). That is, even if the electrical equipment main body 41 approaches the electrical equipment base 40 from diagonally forward, it can be connected while correcting its posture. The electrical equipment main body 41 is also configured to be held by a holding mechanism 32, which will be described later.

[0067] 8 and 9, the mounting / removal jig 3 includes a support 30 that extends in the vertical direction and stands upright while being installed at a reference position with a fixed or approximately fixed relative positional relationship with the work vehicle 2, an arm body 31 that extends in a direction perpendicular to the longitudinal direction of the support 30 and is movable along the support 30, and a holding mechanism 32 that is supported by the arm and that can hold an electrical equipment main body 41 that can be electrically and physically connected to an electrical equipment base 40 fixed at a high position of the work vehicle 2 in a connection direction along a virtual horizontal plane perpendicular to the vertical direction. Furthermore, in this embodiment, the mounting / removal jig 3 includes a lifting device 34 that lifts and lowers the arm body 31 between a raised position and a lowered position. Furthermore, the mounting / removal jig 3 includes a support means 35 that supports the support 30 at a reference position (see FIG. 8). That is, the mounting / removal jig 3 is a jig body 36 for mounting / removing electrical equipment 4, and is equipped with the jig body 36 including a support pillar 30, an arm body 31, a holding mechanism 32, and a lifting device 34, and a support means 35 for supporting the jig body 36.

[0068] At least the lower end side of the support 30 is formed into a cylindrical shape. In this embodiment, as shown in Fig. 9, the support 30 is a straight metal tube that extends straight over its entire length. In other words, the support 30 is a metal pipe that is formed into a cylindrical shape over its entire length.

[0069] A convex rib portion 300 is provided on the outer peripheral surface of the support 30 and is arranged along the center of the support 30. The cross-sectional shape of the convex rib portion 300 when viewed from the top-bottom direction is rectangular. In other words, the convex rib portion 300 is formed like a key extending in the top-bottom direction. The convex rib portion 300 is formed to correspond to the movement range of the arm body 31.

[0070] In this embodiment, restricting bodies 301a, 301b that determine the upper limit position (raised position) and the lower limit position (lowered position) of the movement range of the arm body 31 are attached to the support 30. That is, restricting bodies 301a, 301b are attached to the upper limit position and the lower limit position of the movement range of the arm body 31. Each restricting body 301a, 301b is an annular body that surrounds the support 30, and the outer diameter of the restricting bodies 301a, 301b is set to be larger than the outer diameter of the support 30.

[0071] Accordingly, the convex stripe portion 300 is disposed between the restricting body 301a that determines the upper limit position and the restricting body 301b that determines the lower limit position. That is, the convex stripe portion 300 is attached so as to connect the restricting body 301a that determines the upper limit position and the restricting body 301b that determines the lower limit position.

[0072] Although details will be described later, the support pillar 30 having the above configuration stands up when installed in a reference position and is supported by the work vehicle 2.

[0073] The arm 31 has a base end that is rotatable about an axis that extends in the vertical direction, and a tip end on the opposite side to the base end. The arm 31 moves the holding mechanism 32 along a virtual horizontal plane by rotating about the axis.

[0074] More specifically, the arm body 31 includes a guided part 310 which is a base end of the arm body 31 and is movable along the support pillar 30, and an arm part 311 which includes a tip end of the arm body 31 and is connected to the guided part 310. The guided part 310 has a guide hole 312 through which the support pillar 30 and the convex rib part 300 are inserted. The guide hole 312 includes a circular part corresponding to the cross-sectional shape of the support pillar 30 when viewed from the longitudinal direction of the support pillar 30, and a rectangular part which is continuous with the circular part and corresponds to the cross-sectional shape of the convex rib part 300 when viewed from the longitudinal direction of the support pillar 30.

[0075] Accordingly, the support pillar 30 is inserted into the circular portion of the guide hole 312 between the vertically arranged regulating bodies 301a, 301b, and the convex rib portion 300 is inserted into the rectangular portion of the guide hole 312. As a result, the guided portion 310 is restricted from rotating around the cylindrical support pillar 30, while being movable in the longitudinal direction of the support pillar 30 between the regulating bodies 301a, 301b.

[0076] That is, the arm body 31 (guided part 310) is prevented from rotating with respect to the support pillar 30, but rotates around the upright support pillar 30 by rotating together with the support pillar 30 about the support pillar 30 (center line of the support pillar 30) as the rotation axis. Accordingly, a bar handle 302 for rotating the support pillar 30 is attached to the support pillar 30. The bar handle 302 extends in a direction perpendicular to the support pillar 30, and is disposed at a position (height) accessible to an operator from the ground.

[0077] The holding mechanism 32 is configured to be movable along a virtual horizontal plane at least with the arm body 31 raised, and is configured to be positionally changeable between a connection position P1 where the held electrical component main body 41 and the electrical component base 40 are connected, and a release position P2 where the connection between the held electrical component main body 41 and the electrical component base 40 is released (see FIGS. 14 and 15). In this embodiment, the holding mechanism 32 is connected to the arm body 31 (arm portion 311).

[0078] As a result, the arm body 31 rotates about the support 30, and the holding mechanism 32 moves along a virtual horizontal plane. In addition, by rotating forward and backward about the support 30, the holding mechanism 32 changes its position between a connection position P1 where the held electrical component body 41 and the electrical component base 40 are connected and a release position P2 where the connection between the held electrical component body 41 and the electrical component base 40 is released. In this embodiment, the holding mechanism 32 is configured to be able to change at least one of its posture and position in accordance with the connection between the electrical component body 41 and the electrical component base 40 (see FIGS. 14 and 15).

[0079] More specifically, as shown in Figures 10 and 11, the holding mechanism 32 comprises a base portion 320 supported by the arm body 31 (arm portion 311), and a pair of holding bodies 321, 321 arranged on the base portion 320.

[0080] The base portion 320 includes a first base 323 connected to the arm body 31 (arm portion 311 ) and a second base 324 supported by the first base 323 .

[0081] The first base 323 includes a first base plate 325 and a first support shaft 326 fixed onto the first base plate 325 .

[0082] The first base plate 325 is formed in a flat plate shape and has flat surfaces on the front and back sides. One of the pair of flat surfaces on the front and back sides is fixed (connected) to the arm body 31 (arm portion 311) with its lower side facing downward.

[0083] The first support shaft 326 is a stepped rod including a large diameter portion having a base end and a tip end in the axial direction, and a small diameter portion concentrically connected to the tip of the large diameter portion, and a ring-shaped surface (ring-shaped surface) is formed at the boundary between the small diameter portion and the large diameter portion when viewed from the axial direction.

[0084] The large diameter portion of the first support shaft 326 has a base end fixed to the other flat surface (upper surface) facing upward out of a pair of flat surfaces on the front and back of the first base plate 325. As a result, the first support shaft 326 is erected on the first base plate 325 with the annular surface facing upward.

[0085] The second base 324 includes a second base plate 327 and a second support shaft 328 fixed onto the second base plate 327 .

[0086] The second base plate 327 is formed in a flat plate shape, and has flat surfaces on the front and back. The second base plate 327 is formed with an elongated hole 329 into which the small diameter portion of the first support shaft 326 is inserted. The second base plate 327 rests on the annular surface of the first support shaft 326. That is, the annular surface of the first support shaft 326 constitutes a support surface that supports the second base plate 327. The elongated hole 329 is formed to extend in a lateral direction perpendicular to the front-rear direction when the second base plate 327 is placed in a predetermined posture. As a result, the second base 324 (second base plate 327) is configured to be rotatable around the first support shaft 326 and to be movable in the direction in which the elongated hole 329 extends.

[0087] In the holding mechanism 32 of this embodiment, a tension coil spring CS1 is provided for maintaining the second base plate 327 in a predetermined posture. The spring center of this tension coil spring CS1 coincides with the longitudinal direction of the long hole 329, and one end of the tension coil spring CS1 is hooked to a hook member 330a provided in a protruding manner on the lower surface of the second base plate 327, and the other end of the tension coil spring CS1 is hooked to a hook member 330b provided in a protruding manner on the upper surface of the first base plate 325. Thus, the holding mechanism 32 is configured to be able to change at least one of the posture and the position in accordance with the connection between the electrical equipment main body 41 and the electrical equipment base 40, and is also configured to be able to return to a predetermined posture.

[0088] Two second support shafts 328 are provided with a gap between them in the extending direction of long hole 329. Each second support shaft 328 is a stepped rod including a large diameter portion having a base end and a tip end in the axial direction, and a small diameter portion concentrically connected to the tip end of the large diameter portion, and a ring-shaped surface (ring-shaped surface) is formed at the boundary between the small diameter portion and the large diameter portion when viewed from the axial direction.

[0089] The large diameter portion of the second support shaft 328 has a base end fixed to the other flat surface (upper surface) facing upward out of a pair of flat surfaces on the front and back of the second base plate 327. As a result, the second support shaft 328 is erected on the second base plate 327 with the annular surface facing upward.

[0090] Each of the pair of holders 321, 321 has a boss 331 having an axial hole into which the second support shaft 328 (small diameter portion) is inserted, an extension portion 332 extending from the outer periphery of the boss 331, and a claw portion 333 attached to the tip of the extension portion 332.

[0091] In this embodiment, each of the pair of holders 321, 321 has a hook piece 334 extending from the outer periphery of the boss 331, the hook piece 334 extending from the boss 331 in a direction different from the extending portion 332. The pair of holders 321, 321 are installed such that the hook pieces 334 are arranged symmetrically with respect to a center line that extends in a direction perpendicular to the extension direction of the long hole 329 and passes through the middle position between the two second support shafts 328, 328.

[0092] A tension coil spring CS2 is attached to each of the hook pieces 334 of the pair of holding bodies 321, 321 so that the tip side of each of the extension portions 332 of the pair of holding bodies 321, 321 rotates toward the center line (so that a rotational torque acts). One end of the tension coil spring CS2 is hooked to the hook piece 334, and the other end of the tension coil spring CS2 is hooked to a hook body 335 provided in a protruding manner on the upper surface of the second base plate 327.

[0093] A restricting body 336 for restricting the rotation of the holders 321, 321 is provided on the upper surface of the second base plate 327. The restricting body 336 maintains the extension portion 332 in a position along the center line when the holders 321, 321 are biased by the tension coil spring CS2, while a rotational force acts against the bias of the tension coil spring CS2 to rotate the extension portion 332 away from the center line. The electrodes are positioned so that they rotate in the direction away from each other.

[0094] The claw portion 333 is formed so as to be able to fit into the held portion (recess) 414 provided on both lateral sides of the electrical equipment main body 41 (unit case portion 410). In this embodiment, the extension portion 332 and the claw portion 333 each have a flat surface that faces each other in a direction perpendicular to the front-rear direction, and the claw portion 333 is disposed with its own flat surface facing (contacting) the flat surface of the extension portion 332. One end of the claw portion 333 in the direction in which the extension portion 332 extends is configured as a flat surface perpendicular to the direction in which the extension portion 332 extends. The other end side of the claw portion 333 in the direction in which the extension portion 332 extends is formed in a tapered surface or arc surface shape that is spaced apart from the flat surface facing the extension portion 332 as it moves from the other end toward the one end side. That is, at the other end side of the claw portion 333, the thickness in the lateral direction perpendicular to the front-rear direction is gradually decreased from the one end side toward the other end.

[0095] The claw portion 333 according to this embodiment is configured to be rotatable around an axis extending in a direction perpendicular to the extension direction (direction of the center line) of the extension portion 332. That is, the claw portion 333 is attached to the extension portion 332 via a screw member extending in a direction perpendicular to the extension direction (direction of the center line) of the extension portion 332, and is provided to be rotatable around the screw member.

[0096] The claw portion 333 is adapted to switch (change) the arrangement of one end and the other end by rotating it around the screw member (see the aspect of the claw portion 333 in Figs. 10 and 11). More specifically, when the electrical equipment 4 is attached, the flat surface of one end is positioned on the tip side of the extension portion 332 (the tapered other end is positioned on the second support shaft 328 side), and when the electrical equipment 4 is removed, the tapered other end is positioned on the tip side of the extension portion 332 (the flat surface of one end is positioned on the second support shaft 328 side).

[0097] Since the claws 333 are fitted into the held portions 414 of the electrical equipment 4 (electrical equipment main body 41), the electrical equipment 4 is held, and thus the electrical equipment 4 is restricted from falling off or moving. Thus, the holding mechanism 32 in this embodiment is safe and stable in holding the electrical equipment 4, and further includes a support member 380 that supports the electrical equipment 4 (connected portions 411 of the electrical equipment main body 41) from below. The support member 380 is connected to the base portion 320. In this embodiment, since the base portion 320 includes the first base 323 and the second base 324, the support member 380 is connected to the first base 323.

[0098] Returning to Figs. 8 and 9, the lifting device 34 is configured to be able to transmit a force in the vertical direction to the arm body 31. A more specific description will be given. In this embodiment, the lifting device 34 includes a pair of pulleys 340, 341 arranged at an interval in the longitudinal direction of the support 30, and a rope 342 wound around the pair of pulleys 340, 341, the rope 342 having both ends connected to the arm body 31 (guided portion 310). In this embodiment, one pulley 340 of the pair of pulleys 340, 341 is attached to the upper end of the support 30, and the other pulley 341 of the pair of pulleys 340, 341 is attached to a position slightly lower than the middle part of the support 30.

[0099] In this embodiment, since the support 30 is formed of a straight pipe, approximately half of the cable 342 is arranged inside the support 30. Accordingly, in each of the pair of upper and lower pulleys 340, 341, a part in a direction perpendicular to the up-down direction is arranged to overlap with the inside (hole) of the support 30 when viewed from the up-down direction. In other words, an opening is formed on the outer periphery of the support 30, and the lower pulley 341 is arranged to straddle the inside and outside through the opening.

[0100] Accordingly, the cable 342 passes through the inside of the support 30, is wound around the pulleys 340 and 341, and both ends are connected to the guided portion 310. As a result, the cable 342 can be moved up and down. By pulling the guided portion 310 connected to the rope 342, the guided portion 310 moves up and down (along the support 30).

[0101] In this embodiment, one end of the output shaft of an electric motor 343 (geared motor) with a reducer is connected to the shaft of the lower pulley 341. As a result, the cable 342 is moved by electric drive to move the guided part 310 (arm body 31) up and down. In this embodiment, a handle 344 for manually rotating the output shaft is connected to the other end of the output shaft of the electric motor 343. As a result, the lifting device 34 according to this embodiment is capable of lifting and lowering the arm body 31 either manually or electrically. The electric motor 343 may be supplied with power from an external power source or from a battery mounted on the work vehicle 2. In this embodiment, when the attachment / detachment jig 3 is used, the electric motor 343 is connected to a battery mounted on the work vehicle 2 and is supplied with power from the battery. Accordingly, a switch for starting and stopping the electric motor 343 is provided on an electric circuit connected to the battery.

[0102] The support means 35 rotatably supports at least the lower end side of the support pillar 30. In this embodiment, the support means 35 is disposed at a lateral position of the work vehicle 2.

[0103] More specifically, the support means 35 includes a first support 350 connected to the work vehicle 2, which receives the lower end of the upright support 30, and a second support 351 connected to the work vehicle 2, which is installed at a distance in the vertical direction from the first support 350 and supports the upper side of the lower end of the upright support 30.

[0104] The first support body 350 is a first bracket 352 connected to the vehicle body frame (transmission case) 20 of the work vehicle 2, and includes the first bracket 352 extending from the work vehicle 2, and a first support portion 353 connected to a tip of the first bracket 352. The first bracket 352 is a plate-shaped member extending in the vertical direction. As shown in FIG. 12, the first support portion 353 has a cylindrical portion 354 into which the support pillar 30 can be inserted, the cylindrical portion 354 having a center line extending in the vertical direction, and a receiving portion 355 that closes the lower end opening of the cylindrical portion 354 and receives the lower end of the support pillar 30. The receiving portion 355 is formed in a plate shape.

[0105] In this embodiment, the first support 350 has a conical or truncated conical support base 356 that is inserted into an inner hole at the lower end of the support column 30. The support base 356 is connected to the receiving portion 355 and is arranged so as to be concentric with the receiving portion 355 and the cylindrical portion 354.

[0106] As a result, even if the lower end of the support 30 is inserted into the tubular portion 354 in an off-center state, the lower end of the support 30 is guided by the tapered surface formed on the outer periphery of the support base 356, so that the center of the support 30 coincides with the reference position.

[0107] 8, the second support 351 is disposed at a distance in the up-down direction from the first support 350. The second support 351 is disposed so as to support the support column 30 concentrically (coaxially) with the first support 350.

[0108] More specifically, the second support body 351 is connected to the front pillars 251, 251 of the work vehicle 2 and includes a second bracket 357 extending from the front pillars 251, 251, and a second support portion 358 connected to the tip of the second bracket 357.

[0109] The second bracket 357 is a plate-shaped member extending in the vertical direction. As shown in FIG. 13, the second support portion 358 is a first member 359 connected to the second bracket 357, and a second member 361 connected to the first member 359 via a shaft 360 extending in the vertical direction. The first member 359 and the second member 361 are rotatable around the axis 360. The first member 359 and the second member 361 each have a semicircular arc portion 362a, 362b, and the semicircular arc portions 362a, 362b are opposed to each other to form a ring that can surround the support 30. That is, the second support 351 is configured to surround the support 30 in a rotatable state. The center of the ring is concentric with the center of the cylindrical portion 354 of the first support 350 located below. That is, the center line of the cylindrical portion 354 of the first support 350 and the center line of the ring formed by the first member 359 and the second member 361 of the second support 351 are a common center line extending in the vertical direction. The inner diameter of the ring formed by the first member 359 and the second member 361 is the same or approximately the same as the inner diameter of the cylindrical portion 354 of the first support 350.

[0110] The second member 361 has a straight portion 363 extending straight from the tip of the semicircular portion 362b. The straight portion 363 is formed so as to overlap with a second bracket 357 connected to the base end of the first member 359. A shaft body 364 extending in a direction perpendicular to the straight portion 363 is connected to the straight portion 363, and a hole 365 into which the shaft body 364 can be inserted is formed in the second bracket 357.

[0111] The tip of the shaft body 364 is formed to have a larger diameter than the base end side. Specifically, the shaft body 364 has a small diameter portion connected to the straight portion 363 and a large diameter portion connected to the tip of the small diameter portion, and is formed so that a part of the tip side of the large diameter portion and the small diameter portion protrudes from the second bracket 357 when inserted into the hole 365 of the second bracket 357. Accordingly, a drop lock 366 is attached to the second bracket 357. The drop lock 366 is attached so as to be rotatable around an axis perpendicular to the second bracket 357, and has a notch portion corresponding to the small diameter portion of the shaft body 364. The drop lock 366 is configured so that the second member 361 is prevented from moving away from the first member 359 (rotating around the axis 360) by fitting the notch portion from above into the small diameter portion protruding from the hole 365 of the second bracket 357.

[0112] The work machine 1 (attachment / detachment jig 3) in this embodiment is as described above. When the work machine 1 (work vehicle 2) is moved into or out of a building, the attachment / detachment jig 3 is used to attach and detach the electrical equipment 4 (in this embodiment, the electrical equipment main body 41 of the GPS antenna 4) fixed to the roof bar 26.

[0113] Specifically, when storing the work machine 1 (work vehicle 2) in a building, the electrical equipment 4 (in this embodiment, the electrical equipment main body 41 of the GPS antenna 4) fixed to the roof bar 26 is removed. At this time, the tapered side of the claw portion 333 of the holding mechanism 32 is directed toward the tip side of the extension portion 332 (see FIG. 10). Then, the support pillar 30 is placed at the reference position. In this embodiment, since the support means 35 is connected to the work vehicle 2, the support means 35 supports the support pillar 30. Specifically, the drop lock 366 of the second support 351 is unlocked (the drop lock 366 is unlocked so that the cutout portion is separated from the shaft portion), and then the second member 361 is rotated around the shaft 360 to open the second support 351.

[0114] In this state, the support 30 is brought into an upright state, and the lower end of the support 30 is inserted into the cylindrical portion 354 of the first support 350. In a situation where the center of the support 30 does not coincide with the center of the first support 350 (cylindrical portion 354), the lower end of the support 30 rests on the tapered surface of the support base 356 in the cylindrical portion 354 and is guided by the inclination of the tapered surface. As a result, the center of the lower end of the support 30 coincides with the center of the cylindrical portion 354. Then, with the lower end of the support 30 supported by the first support 350, the support 30 is fitted into the semicircular portion 362a of the first member 359 of the second support 351. In this state, the second member 361 is rotated around the shaft 360, and the support 30 is sandwiched between the semicircular portions 362a and 362b of the first member 359 and the second member 361. As a result, the middle portion of the support pillar 30 is surrounded by a ring formed by the first member 359 and the semicircular arc portions 362a, 362b of the second member 361.

[0115] In this state, the second member 361 is prevented from being opened by fitting the notch of the drop lock 366 into the small diameter portion of the shaft. Therefore, the lower end of the support pillar 30 is supported by the first support body 350, and the middle portion of the support pillar 30 is supported by the second support body 351. In this state, the direction (extension direction) of the arm body 31 can be changed by rotating the support pillar 30. Note that when the support pillar 30 is supported by the support means 35, in order to prevent interference with the work vehicle 2 (particularly the bonnet), the support pillar 30 is supported by the support means 35 so that the extension direction of the arm body 31 (arm portion 311) faces forward of the work vehicle 2, as shown in Figures 14 and 15.

[0116] When the arm body 31 is at the lower limit position, the operator rotates the lower pulley 341 by driving the electric motor 343 or by operating the handle 344. In this embodiment, the electric motor 343 is driven by power supplied from the battery of the work vehicle 2, and when the arm body 31 is at the lower limit position, the arm body 31 is raised.

[0117] In this embodiment, since the support means 35 connected to the work vehicle 2 supports the support pole 30, the relative positional relationship between the work vehicle 2 and the support pole 30 is constant or approximately constant. Therefore, by making the upper limit position of the arm body 31 correspond to the holding position of the electrical equipment 4 by the holding mechanism 32, it is only necessary to raise the arm body 31 to the upper limit position without worrying about the height position of the electrical equipment 4. In this embodiment, when the guided part 310 of the arm body 31 comes into contact with the regulating body 301a that determines the upper limit position, the driving of the electric motor 343 is stopped, and the arm body 31 stops rising (moving) at the upper limit position (raised position). When the operator raises the arm body 31 by operating the handle 344, the operation of the handle 344 is stopped in a state in which the guided part 310 of the arm body 31 comes into contact with the regulating body 301a that determines the upper limit position.

[0118] When the arm body 31 reaches the upper limit position, the operator operates the bar handle 302 for rotation to rotate the support 30. Then, as shown in Figs. 14 and 15, the arm body 31 rotates about the support 30, and the holding mechanism 32 approaches the electrical equipment 4. In this embodiment, since the arm body 31 rotates about the support 30, the holding mechanism 32 also moves on an arc-shaped trajectory with the support 30 as the center. Therefore, if the holding mechanism 32 is fixed to the arm body 31, in the process in which the extension parts 332 of the holding bodies 321, 321 approach the electrical equipment 4, the tip of the extension part 332 collides (crashes) with the electrical equipment 4. However, in this embodiment, since the position and posture of the holding mechanism 32 are changeable, the tip of the extension part 332 is prevented from colliding (crashes) with the electrical equipment 4.

[0119] Specifically, since the second base plate 327 is configured to be movable along the long hole 329 and is biased by the tension coil spring CS1, the second base plate 327 is normally displaced toward the base end side of the arm body 31. As a result, when the arm body 31 rotates and the pair of holders 321, 321 approach the electrical equipment 4, the tip of the extension portion 332 on the base end side of the arm body 31 of the extension portions 332 of the two holders 321, 321 first comes into contact with the side surface of the electrical equipment 4 (the side surface of the unit case part 410). Since the claw portion 333 attached to the extension portion 332 has a tapered end portion positioned on the tip side of the extension portion 332, the arc surface or tapered surface of the tapered end portion moves so as to slide on the side surface of the electrical equipment 4 (the side surface of the unit case part 410). Due to the action of the force caused by this, the second base plate 327 moves along the long hole 329 while changing (rotating) its position around the small diameter portion of the first support shaft 326 .

[0120] Accordingly, the pair of holding bodies 321, 321 slide along the tapered or arcuate surfaces on the tip side of the claw portion 333 on both corners or side surfaces (side surfaces of the unit case portion 410) of the electrical equipment 4. 2 rotates about the second support shaft 328. That is, the claws 333 of the pair of holding parts move while being pushed apart (see FIG. 10). Then, as shown in FIGS. 16 and 17, the claws 333 fit into the held parts (recesses) 414 on the side surfaces of the electrical equipment 4 (side surfaces of the unit case part 410).

[0121] In this state, the end face (flat surface) of the claw portion 333 opposite to the tapered tip side faces the surface that defines the inner circumference of the held portion (recess) 414. That is, in the direction opposite to the direction in which the claw portion 333 is fitted into the held portion 414 (the direction in which the electrical equipment main body 41 is removed from the electrical equipment base 40), the claw portion 333 is engaged with the inner surface (surface facing backward in the front-rear direction) that defines the held portion (recess) 414 on the side surface of the electrical equipment 4 (side surface of the unit case portion 410).

[0122] Therefore, when the arm body 31 is rotated in the reverse direction around the support 30, the claw portion 333 gets caught on the side surface of the electrical component 4 (the side surface of the unit case portion 410), and a force is applied to pull the electrical component main body 41 away from the electrical component base 40. In this embodiment, the electrical component base 40 and the electrical component main body 41 are connected by magnetic attraction, so that by applying a rotational force that exceeds this magnetic force, the holding mechanism 32 moves along a virtual horizontal plane, and the electrical component main body 41 is pulled away from the electrical component base 40. At this time, the claw portion 333 fits into the held portion (recess) 414, so that the electrical component main body 41 is also prevented from falling.

[0123] Then, when the operator rotates the support 30 until the arm body 31 reaches a position P2 where it extends in the front-rear direction (the release position of the holding mechanism 32), he starts the lifting device 34 and lowers the arm body 31. That is, the bonnet 220 and the like are moved away from a position where they would interfere with the lowering of the arm body 31, and then the arm body 31 is lowered. This allows the electric equipment 4 that was in a place on the roof bar 26 that was out of the operator's reach to be removed. Then, by performing the steps in reverse when the support 30 was attached, the support 30 is removed from the support means 35, and the building entrance (height) restriction is no longer imposed. Therefore, the work vehicle 2 (work machine 1) can be stored inside the building.

[0124] When using the work machine 1 (work vehicle 2), the work machine 1 (work vehicle 2) is removed from the building, and the electrical equipment main body 41 (in this embodiment, the electrical equipment main body 41 of the GPS antenna 4) is attached to the electrical equipment base 40 fixed to the roof bar 26.

[0125] When attaching the electrical equipment main body 41 (in this embodiment, the electrical equipment main body 41 of the GPS antenna 4) to the electrical equipment base 40, the operator rotates the claw portion 333 of the holding mechanism 32 around the screw member in advance, and faces the tapered side toward the base end side of the extension portion 332 (see FIG. 11). In this state, the operator holds the electrical equipment main body 41 with respect to the holding mechanism 32. That is, the operator separates the extension portions 332 of the pair of holding bodies 321, 321 from each other, and clamps the side surface of the electrical equipment 4 (the side surface of the unit case portion 410) between the pair of holding bodies 321, 321. In this state, the claw portions 333 of the pair of holding bodies 321, 321 are maintained in a state in which the tapered side faces the base end side of the extension portion 332 as described above, and are fitted into the held portion (recess) 414 on the side surface of the electrical equipment 4 (the side surface of the unit case portion 410).

[0126] Next, the operator sets the support pole 30 on the support means 35 and has the support means 35 support the support pole 30. The method of setting the support pole 30 on the support means 35 is the same as when removing the electrical equipment main body 41. Therefore, to avoid repetition, a description of the method of setting the support pole 30 on the support means 35 will be omitted, but when setting the support pole 30, the arm body 31 (arm portion 311) is positioned so as not to interfere with the work vehicle 2. Note that in this embodiment, after the electrical equipment main body 41 is held by the holding mechanism 32, the support pole 30 is set on the support means 35, but when the arm body 31 is in the lower limit position (when the operator has not yet attached the holding mechanism 32 to the support pole 30), In this case, when the electric equipment main body 41 can be easily accessed from the inside of the support means 35, the support pillar 30 may be set on the support means 35, and then the electric equipment main body 41 may be held (clamped) by the holding mechanism 32 supported by the arm body 31 at the lowermost position.

[0127] When the arm body 31 is at the lowest position, the lower pulley 341 is rotated by driving the electric motor 343 or by operating the handle 344. In this embodiment, the electric motor 343 is driven by power supplied from the battery of the work vehicle 2, and when the arm body 31 is at the lowest position, it is raised.

[0128] When the arm body 31 reaches the upper limit position (raised position), the driving of the electric motor 343 is stopped, and the support pillar 30 is rotated by the rotation handle 344 lever. Then, the arm body 31 rotates about the support pillar 30, and the electrical equipment main body 41 held by the holding mechanism 32 together with the holding mechanism 32 approaches the electrical equipment base 40 fixed to the roof bar 26 (in a fixed position). In this case as well, since the arm body 31 rotates about the support pillar 30, the electrical equipment main body 41 together with the holding mechanism 32 moves on an arc-shaped trajectory with the support pillar 30 as the center.

[0129] Accordingly, the locking claw 412 of the electrical equipment main body 41 also moves on an arc-shaped track. Therefore, if the groove width of the groove 402 of the electrical equipment base 40 corresponds to the width (groove width) corresponding to the locking claw 412 over the entire length, the locking claw 412 interferes (collides) with the periphery of the open end of the groove 402. However, in this embodiment, since the open end of the groove 402 of the electrical equipment base 40 constitutes the open end of the enlarged portion 402b, the locking claw 412 enters the groove 402 from the open end of the enlarged portion 402b. When the locking claw 412 hits a side wall that defines the groove 402 (enlarged portion 402b), the force acting due to the contact causes the holding mechanism 32 to change its position and posture. That is, the holding mechanism 32 changes its position and posture so that the locking piece 403 can proceed inside the groove 402.

[0130] As described above, when the locking claw 412 hits the side wall that defines the groove 402 (expanded portion 402b), a force (impact force) acts in the direction opposite to the direction in which the locking claw 412 advances in the groove 402. However, since the end face (flat face) of the claw portion 333 of the holding mechanism 32 opposite to the tapered side faces the tip side of the extension portion 332, the end face (flat face) of the claw portion 333 comes into contact with the surface that defines the inner surface of the held portion (recess) 414 on the side surface of the electrical component 4 (side surface of the unit case portion 410), and transmits the force (pushing force) that causes the electrical component main body 41 (locking claw 412) to advance to the electrical component main body 41. As a result, the locking claw 412 advances in the groove 402 and moves from the expanded portion 402b to the straight portion 402a. Following this, the positioning protrusion 413 also advances in the groove 402. Then, the positioning projection 413 reaches inside the straight portion 402a. In this state, the electrical component main body 41 is aligned with the center of the electrical component base 40 fixed to the roof bar 26.

[0131] In this state, the connecting part 401 (first connecting surface SJ1 and second connecting surface SJ2) and the connected part 411 (first connected surface SJ3 and second non-connected surface) face each other, and the magnetic body (metal body 418) of the second connected part 416 is attracted by the magnetic force of the magnet 407 of the second connecting part 405, and the magnet 407 and the magnetic body are magnetically attracted to each other. In this state, the locking claw 412 also faces the locking piece 403 at the end of the groove 402 (straight portion 402a). This restricts the movement of the electrical equipment main body 41 in the vertical direction and in the direction perpendicular to the vertical direction relative to the electrical equipment base 40.

[0132] In this state, the multiple primary contacts 406... of the first connecting portion 404 (first connecting surface SJ1) and the multiple secondary contacts 417... of the first connected portion 415 (first connected surface SJ3) come into contact with each other, electrically connecting the antenna unit U of the electrical equipment main body 41 to the control unit and power source of the work vehicle 2. This enables power supply to the antenna unit U and signal communication between the antenna unit U and the control unit. Therefore, the electrical equipment main body relative to the electrical equipment base 40 Installation of 41 is complete.

[0133] When the attachment of the electrical component body 41 to the electrical component base 40 is completed, the arm body 31 (arm portion 311) is rotated (reversely rotated) around the support post 30.

[0134] Then, the tapered surface or arc surface of the tapered portion of the claw portion 333 of the holding mechanism 32 comes into contact with an edge that defines the opening (aperture) of the held portion (recess) 414. Accordingly, a component force of the rotational force (force accompanying reverse rotation) of the arm body 31 acts as a force in a direction that separates the pair of holding bodies 321, 321 (claw portions 333) from each other. As a result, while the connection between the electrical equipment main body 41 and the electrical equipment base 40 is maintained, the claw portions 333 attached to the pair of holding bodies 321, 321 come out of the held portion (recess) 414, and the holding of the electrical equipment 4 (electrical equipment main body 41) by the holding mechanism 32 is released.

[0135] When the holding mechanism 32 detaches from the electrical equipment main body 41 and the arm body 31 reaches a position where it does not interfere with the work vehicle 2 (e.g., the bonnet 220) (release position P2: a position where it does not overlap projectively when viewed from the top and bottom), the operator operates the switch to drive the lifting device 34 and lowers the arm body 31 to the lowest position, then releases the electrical connection to the electric motor 343 and removes the support pillar 30 from the support means 35.

[0136] In this state, the work machine 1 (work vehicle 2) is ready to perform work using the electrical equipment 4 (GPS antenna 4). Here, the arm body 31 is lowered to the lowest position and then the support pillar 30 is removed from the support means 35, but the support pillar 30 may be removed from the support means 35 with the arm body 31 at the highest position. Note that when the arm body 31 is at the highest position, the center of gravity is high and handling efficiency is reduced, so it goes without saying that it is preferable to remove the support pillar 30 from the support means 35 after lowering the arm body 31 to the lowest position as described above.

[0137] As described above, the work machine 1 according to this embodiment includes the work vehicle 2 and the attachment / detachment jig 3, and the support pillar 30 is supported by the work vehicle 2 while being installed at the reference position. This provides the excellent effect that the work machine 1 according to this embodiment can easily attach and detach the electrical component 4 to and from a high position on the work vehicle 2.

[0138] Specifically, the attachment / detachment jig 3 in this embodiment comprises a support pillar 30 that extends in the vertical direction and stands upright while being installed at a reference position with a fixed or approximately fixed positional relationship relative to the work vehicle 2, an arm body 31 that extends in a direction perpendicular to the longitudinal direction of the support pillar 30 and is movable along the support pillar 30, and a holding mechanism 32 that is supported by the arm and is capable of holding an electrical main body 41 that is electrically and physically connectable to an electrical base 40 fixed at a high position on the work vehicle 2 in a connection direction along a virtual horizontal plane perpendicular to the vertical direction, the holding mechanism 32 being capable of holding an electrical main body 41 that is electrically and physically connectable to an electrical base 40 fixed at a high position on the work vehicle 2 in a connection direction along a virtual horizontal plane perpendicular to the vertical direction, the holding mechanism 32 being configured to be movable along the virtual horizontal plane at least when the arm body 31 is raised, and is configured to be capable of changing its position between a connection position P1 where the held electrical main body 41 and electrical base 40 are connected, and a release position P2 where the connection between the held electrical main body 41 and electrical base 40 is released.

[0139] In this way, the support pillar 30 is arranged at a reference position whose relative positional relationship with the work vehicle 2 is constant or approximately constant, and therefore the positional relationship with the work vehicle 2 of other components (arm body 31, holding mechanism 32) based on the support pillar 30 is also specified. In other words, the height (vertical distance) and the distance in the direction along the virtual horizontal plane from the holding mechanism 32 (electrical equipment 4) to the position where the electrical equipment 4 is to be attached are determined. Then, by moving the arm body 31 along the support pillar 30, the height of the holding mechanism 32 supported by the arm body 31 can be changed. Accordingly, the electrical equipment 4 to be held by the holding mechanism 32 can be arranged at a height corresponding to the mounting position at a high place on the work vehicle 2. This can be done.

[0140] Since the electrical and physical connection direction of the electrical component main body 41 to the electrical component base 40 is along the imaginary horizontal plane, the electrical component main body 41 is moved toward or away from the electrical component base 40 by moving the holding mechanism 32 along the imaginary horizontal plane. Accordingly, the electrical component main body 41 can be attached (coupled) to the electrical component base 40 by reaching a connection position P1 where the electrical component main body 41 held by the holding mechanism 32 and the electrical component base 40 are connected, and the electrical component main body 41 can be removed from the electrical component base 40 by reaching a release position P2 where the connection between the held electrical component main body 41 and the electrical component base 40 is released.

[0141] In this way, by simply installing the support 30, adjusting the height of the arm body 31, and adjusting the position of the holding mechanism 32 in a direction along the virtual horizontal plane, the electrical equipment 4 can be attached and detached to and from a high position on the work vehicle 2.

[0142] The arm body 31 has a base end that is rotatable around an axis extending in the vertical direction, and a tip end opposite the base end. Rotation around the axis moves the holding mechanism 32 along a virtual horizontal plane.

[0143] In this way, the holding mechanism 32 supported by the arm body 31 can be moved along a virtual horizontal plane simply by rotating the arm body 31. In addition, by rotating the arm body 31 forwards or backwards after disposing it at a predetermined height, the holding mechanism 32 (electrical component 4) can be moved toward or away from the mounting position of the electrical component 4. In other words, the holding mechanism 32 can be moved between a connection position P1 where the held electrical component main body 41 and the electrical component base 40 are connected and a release position P2 where the connection between the held electrical component main body 41 and the electrical component base 40 is released, without complicating the structure.

[0144] The arm body 31 rotates around the erected support 30. In this way, the reference for the vertical movement of the arm body 31 and the reference for the rotation of the arm body 31 become the support 30, so that the movement accuracy of the holding mechanism 32 supported by the arm body 31 is improved and the electrical component main body 41 can be attached and detached to and from the electrical component base 40 reliably.

[0145] The mounting / dismounting jig 3 according to this embodiment includes a lifting device 34 for lifting and lowering the arm body 31 between an elevated position and a lowered position, which makes it easy to move the arm body 31 up and down.

[0146] The attachment / detachment jig 3 in this embodiment is equipped with a support means 35 that supports the support pillar 30 at a reference position, and at least the lower end side of the support pillar 30 is formed in a cylindrical shape, and the support means 35 supports at least the lower end side of the support pillar 30 rotatably.

[0147] In this way, the support 30 can be stably arranged in an upright state, and the reference position for arranging the support 30 is prevented from being displaced. This makes it easier to attach and detach the electrical component main body 41 to and from the electrical component base 40.

[0148] The support means 35 is disposed at a position to the side of the work vehicle 2. In this way, when the support pillar 30 is placed in the reference position, the support pillar 30 can be placed without being hindered by the work vehicle 2.

[0149] The support means 35 includes a first support 350 connected to the work vehicle 2, which receives the lower end of the upright support 30, and a second support 351 connected to the work vehicle 2, which is installed at a distance in the vertical direction from the first support 350 and supports the upper side of the lower end of the upright support 30.

[0150] In this way, the support pillar 30 is supported at two points spaced apart in the vertical direction, so that it can be kept standing in a stable state.

[0151] The first support 350 has a conical or truncated cone-shaped support base 356 that is inserted into an inner hole at the lower end of the support 30, and the second support 351 is configured to be able to surround the support 30 while the support 30 is rotatable.

[0152] In this way, when the support column 30 is disposed, the center of the support column 30 is aligned with the center of the support base 356. This makes it less likely that variation will occur in the placement of the support column 30 in the reference position.

[0153] The holding mechanism 32 is configured to be able to change at least one of the posture and position in accordance with the connection between the electrical component main body 41 and the electrical component base 40. In this way, by changing at least one of the posture and position of the holding mechanism 32, the electrical component main body 41 can be positioned to match the position of the electrical component base 40, and the electrical component main body 41 can be reliably attached to and detached from the electrical component base 40 even if high positional accuracy is required when connecting the electrical component base 40 and the electrical component main body 41.

[0154] It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that appropriate modifications can be made without departing from the gist of the present invention.

[0155] In the holding mechanism 32 of the above embodiment, each of the pair of holding bodies 321, 321 is configured to be rotatable about the second support shaft 328, so that the pair of extension parts 332 (claw parts 333) move (rotate) in the direction of approaching and separating, but this is not limited thereto. For example, as shown in Fig. 18, the pair of holding bodies 321, 321 may move in parallel to move the claw parts 333 in the direction of approaching and separating.

[0156] In this case, the holding mechanism 32 may include a pinion 50 rotatable about an axis extending in the vertical direction, and a pair of racks 51, 51 meshing with the pinion 50, the pair of racks 51, 51 being arranged parallel or approximately parallel across the pinion 50 and connected to corresponding holding bodies 321, 321. In this case, it is preferable that the output shaft of the electric motor or the output shaft of a reduction mechanism driven by the electric motor be the rotation shaft of the pinion 50.

[0157] In this way, by rotating the pinion 50 forward or backward, the racks 51, 51 move linearly in opposite directions. Therefore, the pair of holders 321, 321 (claws 333) connected to the racks 51, 51 move toward and away from each other while maintaining their parallelism. This allows the claws 333 to be fitted into and removed from the held portion (recess) 414 of the electrical equipment 4 in a direction perpendicular to the front-rear direction. In this case, it is preferable to provide a linear guide 52 that guides the linear movement of the rack 51. The linear guide 52 includes a straight rail 52a and a slider 52b that moves along the rail 52a, and the linear movement of the rack 51 can be ensured by connecting the rack 51 to the slider 52b.

[0158] In the above embodiment, the arm body 31 is configured to be rotatable around an axis extending in the vertical direction, and by rotating the arm body 31, the holding mechanism 32 is moved in a direction along a virtual horizontal plane, and is configured to be able to change its position between a connection position P1 where the held electrical equipment main body 41 and the electrical equipment base 40 are connected, and a release position P2 where the connection between the held electrical equipment main body 41 and the electrical equipment base 40 is released, but this is not limited to the above.

[0159] For example, as shown in FIG. 19, a second base 324 (second base plate 325: base plate fixed to the arm body 31) may be mounted on a first base 323 (first base plate 325: base plate fixed to the arm body 31) in the above embodiment. 19) may be connected so as to be linearly movable in the front-rear direction. Even in this case, the attachment / detachment jig 3 may include a pinion 53 attached to either the first base 323 or the second base 324 (the first base 323 in FIG. 19) and rotatable about an axis extending in the vertical direction, and a rack 54 meshing with the pinion 53, attached to the other of the first base 323 or the second base 324 (the second base 324 in FIG. 19) and extending in the front-rear direction.

[0160] In this case, it is preferable that the output shaft of the electric motor or the output shaft of the reduction mechanism driven by the electric motor is the rotation shaft of the pinion 53. In this way, the rack 54 moves linearly in the front-rear direction by rotating the pinion 53 forward and backward. Therefore, the first base 323 and the second base 324 move relatively in the front-rear direction along the imaginary horizontal plane. As a result, the holding mechanism 32 (the pair of holding bodies 321, 321) supported by the second base 324 is configured to be positionally changeable between a connection position P1 where the held electrical equipment main body 41 and the electrical equipment base 40 are connected and a release position P2 where the connection between the held electrical equipment main body 41 and the electrical equipment base 40 is released. In this case, it is preferable to provide a linear guide 55 that guides the relative linear movement of the first base 323 and the second base 324.

[0161] The linear guide 55 includes a straight rail 55a and a slider 55b that moves along the rail 55a, and by connecting the slider 55b to either the first base 323 or the second base 324 (the second base 324 in FIG. 19) and connecting the rail 55a to the other of the first base 323 or the second base 324 (the first base 323 in FIG. 19), it is possible to ensure relative linear movement between the first base 323 and the second base 324. In this case, the required movement distance can be ensured by appropriately setting the length of the rail 55a.

[0162] In the above embodiment, the lifting device 34 includes a pair of pulleys 340, 341 spaced apart from each other in the vertical direction, and a cable 342 wound around the pair of pulleys 340, 341 and connected to the guided portion 310 of the arm body 31, and the cable 342 is moved in the longitudinal direction by rotating the pulleys 340, 341 to lift and lower the arm body 31, but is not limited thereto. For example, as shown in Fig. 20, the lifting device 34 may include a rack 56 attached to the outer surface of the support 30, the rack 56 extending in the vertical direction, and a pinion 57 meshing with the rack 56, the pinion 57 being directly or indirectly supported by the arm body 31 and rotatable around an axis extending in a direction perpendicular to the vertical direction.

[0163] In this case, an electric motor 58 may be provided which directly or indirectly rotates the pinion. In this way, when the pinion 57 is rotated by the driving of the electric motor 58, the pinion 57 meshes with the rack 56, causing the arm body 31 to move up and down. In this case, since a twisting action may occur in the circumferential direction of the support 30 during the vertical movement (raising and lowering) of the arm body 31, it is preferable to provide a linear guide 59 which moves the arm body 31 linearly in the vertical direction. Specifically, it is preferable that a linearly extending rail 59a is fixed to the outer surface of the support 30 so as to extend in the vertical direction, and a slider 59b which moves along the rail 59a is connected to the arm body 31.

[0164] In the above embodiment, the support pillar 30 is formed cylindrically over its entire length and serves as the center of rotation of the arm body 31, but this is not limited thereto. The support pillar 30 may be cylindrical in the range that functions as the axis of rotation (center) (for example, the region from the middle part to the lower side (lower end side)). In other words, the range that does not function as the axis of rotation (center) may be formed in a polygonal shape other than a circle.

[0165] In the above embodiment, the center of rotation of the arm 31 is the support 30, and the arm 31 rotates together with the support 30, but this is not limiting. For example, the arm 31 may be It may be configured to be rotatable about an axis extending in the vertical direction separate from the support column 30. In other words, the arm body 31 may be rotatably connected to a lifting base that is vertically movable (liftable) along the support column 30.

[0166] More specifically, as shown in Fig. 21, the guided portion 310 and the arm portion 311 may be connected to each other so as to be relatively rotatable via a shaft 60 extending in the vertical direction. In this case, the first gear 61 may be connected to either the guided portion 310 or the arm portion 311 (the arm portion 311 in Fig. 21) so as to be concentric or approximately concentric with the shaft 60. A second gear 62 meshing with the first gear 61 may be rotatably supported by the other of the guided portion 310 or the arm portion 311 (the guided portion 310 in Fig. 21).

[0167] In FIG. 21, the arm portion 311 and the first gear 61 are non-rotatably connected to the shaft 60 extending in the vertical direction, and the shaft 60 connected to the arm portion 311 is rotatably supported by the guided portion 310. Accordingly, the second gear 62 meshing with the first gear 61 is supported by the guided portion 310 and is provided rotatably about the shaft extending in the vertical direction. Specifically, the second gear 62 is connected to an output shaft extending in the vertical direction of the electric motor 63, and the electric motor 63 is supported by the guided portion 310. In this way, the rotation of the second gear 62 is transmitted to the first gear 61 non-rotatably connected to the arm portion 311 via the shaft 60, and as a result, the arm portion 311 rotates about the shaft 60 rotatably supported by the guided portion 310.

[0168] Therefore, similarly to the above embodiment, the holding mechanism 32 moves along an arc-shaped trajectory in a virtual horizontal plane. In this case, when the lifting device 34 includes the rack 56 and the pinion 57 as described above, the pinion 57 (or the pinion 57 and the electric motor 58 when the electric motor 58 is included) is supported by the guided portion 310 as shown in FIG. 21. The slider 59b of the linear guide 59 is also supported by the guided portion 310.

[0169] In the above embodiment, the positioning GPS antenna 4 has been described as an example of the electrical equipment 4 to be attached and detached by the attachment / detachment jig 3, but the present invention is not limited thereto. The electrical equipment 4 to be attached and detached by the attachment / detachment jig 3 may be any electrical equipment that is attached to the roof 250 or the roof bar 26, which is the maximum ground clearance, and protrudes upward from the roof 250 or the roof bar 26, and may be, for example, antennas other than the GPS antenna 4 or lighting equipment such as a floodlight (searchlight) 5. However, in any case, the electrical equipment 4 includes an electrical equipment base 40 fixed to the roof 250 or the roof bar 26, and an electrical equipment main body 41 (to be attached and detached) attached to the electrical equipment base 40, and the electrical equipment main body 41 is assumed to have a configuration that can be electrically and physically connected to the electrical equipment base 40 in a connection direction along a virtual horizontal plane perpendicular to the up-down direction.

[0170] Regarding the electric equipment 4, in the above embodiment, the electric equipment base 40 and the electric equipment main body 41 are connected by magnetic force, but the present invention is not limited to this. For example, as shown in Fig. 22, a regulating member 70 may be mounted in either one of the side wall surface defining the groove 402 of the electric equipment base 40 or the side surface of the positioning protrusion 413 so as to be able to move forward and backward, and a spring 71 for biasing the regulating member 70 outward may be mounted in either one of the side wall surface defining the groove 402 of the electric equipment base 40 or the side surface of the positioning protrusion 413 so as to form a recess 72 into which the regulating member 70 fits. In this way, the coupled state between the electric equipment base 40 and the electric equipment main body 41 is maintained by the regulating member 70 fitting into the recess 72, while the regulating member 70 is retracted (pushed in) by a force acting on the regulating member 70 as the electric equipment base 40 and the electric equipment main body 41 move relative to each other in the front-rear direction, and the coupled state between the electric equipment base 40 and the electric equipment main body 41 is released.

[0171] The restricting member 70 may be a pin-shaped member as shown in FIG. 22, but may also be a sphere ( It should be noted that, when the regulating member 70 is formed in a shape other than a sphere (ball), the outer surface of the portion protruding from either the side wall surface defining the groove 402 or the side surface of the positioning protrusion 413 (portion protruding from the recess 72) is configured as a spherical surface or a tapered surface. In other words, the regulating member 70 is formed so as to be pushed in (retracted) by the action of a force in the front-rear direction relative to the electrical equipment main body 41 (a force when attempting to move) or a component force thereof.

[0172] In the above embodiment, the attachment / detachment jig 3 is assumed to be supported by the work vehicle 2 and is treated as one component (accessory) of the work machine 1, but is not limited thereto. For example, the attachment / detachment jig 3 may be configured as a separate and independent component with respect to the work vehicle 2. Also, in the above embodiment, the work vehicle 2 supports the attachment / detachment jig 3 (the support 30), but the support 30 may be free-standing (standing on the ground) without being supported by the work vehicle 2 (independently from the work vehicle 2). However, since the attachment / detachment jig 3 is for attaching and detaching the electrical equipment 4 at a high position on the work vehicle 2, it goes without saying that the relationship (relative positional relationship) with the work vehicle 2 is secured during use (when the electrical equipment 4 is attached or detached). For example, if the jig body 36 (support 30) is installed in a fixed position and the stopping position of the work vehicle 2 (e.g., the wheel arrangement position) is determined with a marker or the like, the relative positional relationship between the support 30 (or other structures based on the support 30) and the work vehicle 2 will be constant, so that even if the support 30 is placed in a fixed position, it can be used as a reference position in relation to the work vehicle 2.

[0173] In the above embodiment, a tractor has been described as the work vehicle 2, but the present invention is not limited to this. The work vehicle 2 may be, for example, an agricultural machine (agricultural vehicle) such as a combine harvester or a transplanter, or a construction machine (construction vehicle) such as a loader.

[0174] In the above embodiment, a diesel engine is used as the prime mover 22 of the work vehicle 2, but this is not limited to this. The prime mover 22 of the work vehicle 2 may be a gasoline engine or an electric motor 343, or may be a hybrid type having an engine and an electric motor 343. [Explanation of symbols]

[0175] 1: Work equipment 2: Work vehicle 3: Attachment / removal jig (for attaching / removing high-rise electrical equipment for work vehicles) 4: Electrical equipment (GPS antenna) 30: Strut 31: Arm body 32: Holding mechanism 34: Lifting device 35 :Support means 40: Electrical base 41: Electrical equipment 350: First support 351:Second support 356 :Support stand P1: Connection position P2: Release position

Claims

1. A support pillar that extends in a vertical direction and stands upright while being installed at a reference position whose relative positional relationship with the work vehicle is constant or approximately constant; an arm extending in a direction perpendicular to the longitudinal direction of the support and movable along the support; a holding mechanism capable of holding an electrical equipment main body that can be electrically and physically connected to an electrical equipment base fixed at a high position of the work vehicle in a connection direction along a virtual horizontal plane perpendicular to the up-down direction, the holding mechanism being supported by the arm; The holding mechanism is configured to be movable along the virtual horizontal plane at least when the arm body is raised, and is configured to be positionable between a connection position where the held electrical equipment main body is connected to the electrical equipment base, and a release position where the connection between the held electrical equipment main body and the electrical equipment base is released. This is a high-altitude electrical equipment attachment / detachment jig for a work vehicle.

2. The arm body is The actuator has a base end portion rotatable around an axis extending in the vertical direction, and a tip end portion opposite the base end portion, 2. The jig for attaching and detaching electrical equipment at elevated positions for a work vehicle according to claim 1, wherein the holding mechanism is moved along the virtual horizontal plane by the rotation about the axis.

3. 3. The jig for attaching and detaching electrical equipment at elevated positions for a work vehicle according to claim 2, wherein the arm body rotates around the erected support column.

4. 4. The jig for attaching and detaching electrical equipment at elevated positions for a work vehicle according to claim 3, further comprising a lifting device for raising and lowering said arm body between an elevated position and a lowered position.

5. a support means for supporting the support column at the reference position; At least the lower end side of the support is formed into a cylindrical shape, 5. The jig for attaching and detaching electrical equipment at elevated positions for a work vehicle according to claim 4, wherein said support means rotatably supports at least a lower end side of said pillar.

6. 6. A jig for attaching and detaching electrical equipment at elevated positions for a work vehicle according to claim 5, wherein said support means is disposed at a lateral position of said work vehicle.

7. The support means is A first support body connected to the work vehicle, the first support body receiving a lower end portion of the upright support pillar; 7. The high-altitude electrical equipment removal jig for a work vehicle as described in claim 6, further comprising: a second support body connected to the work vehicle, the second support body being installed at a distance from the first support body in the vertical direction and supporting an upper side of the lower end of the upright pillar.

8. The first support has a conical or frustum-shaped support base that is inserted into an inner hole at the lower end of the support column, The jig for attaching and detaching high-placed electrical equipment for a work vehicle according to claim 7, wherein the second support body is configured to be able to surround the periphery of the support column while the support column is rotatable.

9. 9. The jig for attaching and detaching electrical equipment at elevated positions for a work vehicle according to claim 8, wherein the holding mechanism is configured so that at least one of an attitude and a position can be changed in accordance with the connection between the electrical equipment body and the electrical equipment base.

10. A work machine comprising: a work vehicle; and a high-altitude electrical equipment mounting / removal jig for a work vehicle as described in any one of claims 1 to 9, wherein the support pillar is installed at the reference position and supported by the work vehicle.

Images