Operation device and work vehicle

Abstract

In an operation device (18) for a work vehicle (1) equipped with a front loader (4), the operability of the work vehicle (1) is improved when using the front loader (4).　The operation device (18) is installed in a driver cabin (7S) of the work vehicle (1) to operate the front loader (4), which is attached to a vehicle body (2) of the work vehicle (1). The operation device (18) comprises: a lever shaft (44) extending in the driver seat cabin(7S); a grip portion (43) provided at a distal end (44A) of the lever shaft (44); and a plurality of operation switches (45) provided in the grip portion (43) to cause the work vehicle (1) to execute various actions. The operation switches (45) include a shuttle toggling switch (45a) for toggling between advancing and reversing of the work vehicle (1), and a shuttle restraining switch (45e) for restraining or releasing the restraining of a toggling operation by the shuttle toggling switch (45a).

Description

[Technical field]

[0001] The present invention relates to an operating device mounted on a work vehicle such as a tractor, and to a work vehicle equipped with the same. [Background technology]

[0002] 2. Description of the Related Art Conventionally, an operating device disclosed in Patent Document 1 is known.

[0003] The work vehicle (tractor) disclosed in Patent Document 1 is equipped with a first operating device (multifunction operating tool) for increasing or decreasing the travel speed of the vehicle, and a second operating device (multi-operation operating tool) for operating optional functions such as a front loader attached to the front of the vehicle body. The first operating device and the second operating device are provided in an armrest section beside the driver's seat of the work vehicle (tractor). The grip of the first operating device is provided with a shuttle changeover switch (forward / reverse button) for switching between forward and backward movement of the vehicle. The second operating device is a joystick-type operating device, and a push button-type operating switch (first fingertip operating tool) is provided on the top of the grip (joystick body). A dial-type operating switch (first fingertip operating tool) is provided on the side of the grip. All of these operating switches are optional switches, and for example, a function for storing the lifting position of a bucket attached to the front end of the front loader can be assigned to them. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication "JP Patent Publication No. 2016-41565" Summary of the Invention [Problem to be solved by the invention]

[0005] However, with the conventional operating device, when working with a front loader, switching between forward and reverse of the vehicle and operating the front loader must be performed with separate operating devices (first operating device and second operating device), which requires the user to take the time to change grips. There is also a risk of failing to grip the grip in the correct position and operating the wrong operating switch.

[0006] The present invention has been made to solve such problems with the conventional technology, and aims to provide an operating device and a work vehicle that can easily and appropriately switch the work vehicle between forward and reverse, even when working using a front loader. [Means for solving the problem]

[0007] The present invention employs the following technical means to achieve the above object.

[0008] An operating device according to one aspect of the present invention is an operating device provided in a driver's seat section of a work vehicle for operating a front loader mounted on a body of the work vehicle, the operating device comprising: Side position of the seat To Swingable stand Be for moving the front loader up and down by a swinging operation; a lever shaft; a grip portion provided at a tip end of the lever shaft; and a plurality of operation switches provided at the grip portion for causing the work vehicle to perform various operations, The grip portion has a substantially horizontally elongated columnar horizontal extension portion extending toward the seat side at an upper portion of the grip portion, The operation switch is Provided in the transverse extension portion, a shuttle changeover switch for switching between forward and reverse of the work vehicle; Provided in the transverse extension portion, and a shuttle check switch for checking and releasing the switching operation by the shuttle changeover switch.

[0009] The shuttle changeover switch may be provided in a position where it can be operated by the thumb of the hand holding the gripping portion, and the shuttle check switch may be provided in a position where it can be operated by fingers other than the thumb of the hand holding the gripping portion.

[0010] The above Horizontal sectionThe shuttle changeover switch has a recess that is recessed inward from the surface portion, and the operation surface portion of the shuttle changeover switch is Horizontal section The recess may be provided so as not to protrude outside the surface of the device.

[0011] The operation switch may include a work tool operation switch to which an operation function of a work tool of the front loader can be assigned, and the shuttle changeover switch may be disposed adjacent to the work tool operation switch.

[0012] The implement operation switch may be capable of allocating an operation function of an implement that is attached instead of or in addition to a bucket of the front loader.

[0013] The grip portion has a substantially vertically elongated columnar base end portion extending upward from a tip end portion of the lever shaft, The above A transverse extension portion, The lateral extension portion extends from an upper end of the base end portion toward the seat side, The shuttle changeover switch and the shuttle check switch may be provided on an outer circumferential surface portion of the lateral extension portion.

[0014] The seat-side tip surface portion of the horizontal extension portion is inclined from the leading edge side, which is the tip side of the hand holding the horizontal extension portion, toward the opposite rear edge side so as to face the seat side, and at least one of the operating switches other than the shuttle changeover switch and the shuttle restraint switch may be provided on the tip surface portion.

[0015] The lateral extension portion may be inclined upward as it extends from the tip side of the lever shaft toward the seat side.

[0016] A raised portion capable of hooking and holding the thumb of a hand holding the horizontal extension portion may be provided at a position on the outer circumferential surface portion closer to the tip than the middle position in the extension direction of the horizontal extension portion.

[0017] The operation switch may include a gear change switch for changing a gear position of the work vehicle, and the gear change switch may be provided on a tip surface portion of the lateral extension portion on the seat side.

[0018] The operation switch may include a loader light switch for switching on and off an illumination light provided on the front loader, and the loader light switch may be provided on a tip surface portion on the seat side of the lateral extension portion.

[0019] A work vehicle according to one aspect of the present invention includes a vehicle body capable of travelling, The driver's seat and A front loader attached to the vehicle body; A driver's seat is provided in a swingable manner, For operating the vehicle body It is an operating lever. A first operating device; A vehicle seat is provided in a manner that allows the vehicle to swing in the driver's seat section and adjacent to the first operating device. for operating the front loader It is an operating lever. A second operating device, the first operating device and the second operating device each have a plurality of operating switches for causing the work vehicle to perform various operations, The first operating device The above The operation switch is a first shuttle changeover switch for switching the forward and reverse of the work vehicle. a first shuttle check switch for checking and releasing the switching operation by the first shuttle changeover switch; The above The operation switch includes a second shuttle changeover switch for switching between forward and reverse of the work vehicle, and a second shuttle check switch for checking and releasing the check on the switching operation by the second shuttle changeover switch.

[0020] The first operating device and the second operating device may be arranged on one side of a seat provided in the vehicle body and in a position where a driver sitting in the seat can grasp and operate the gripping portion with the hand on the one side, the first shuttle selector switch and the second shuttle selector switch may be provided in a position where they can be operated with the thumb of the hand grasping the gripping portion, and the first shuttle check switch and the second shuttle check switch may be provided in a position where they can be operated with fingers other than the thumb of the hand grasping the gripping portion. Effect of the Invention

[0021] According to the above-described operating device and work vehicle, the work vehicle can be switched between forward and reverse motion while operating the front loader, so that the operability of the work vehicle when using the front loader is significantly improved. [Brief description of the drawings]

[0022] [Figure 1] FIG. 2 is a side view of the work vehicle with the front loader lowered. [Diagram 2] FIG. 2 is a side view of the work vehicle with the front loader raised. [Diagram 3] FIG. 2 is a front perspective view of the upper periphery of the cabin. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. 2 is a side perspective view of the vicinity of the middle part of the boom. [Figure 7] FIG. 2 is a side perspective view of the periphery of a second illuminator. [Figure 8] FIG. 4 is a partially exploded perspective view of a second illuminating lamp. [Figure 9] FIG. 4 is a rear perspective view of the periphery of the loader operating lever. [Figure 10] FIG. [Figure 11] FIG. [Figure 12A] 4 is a schematic vertical cross-sectional view of the periphery of a first operation switch of a loader operation lever. FIG. [Figure 12B] 4 is a schematic vertical cross-sectional view of the periphery of a second operation switch of the loader operation lever. FIG. [Figure 13A] 4 is a schematic vertical cross-sectional view of the periphery of a third operation switch of the loader operation lever. FIG. [Figure 13B] 11 is a schematic vertical cross-sectional view of the periphery of a fourth operation switch of the loader operation lever. FIG. [Figure 14] FIG. 2 is a schematic configuration diagram of a control device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0024] <Work vehicle> 1 and 2 are side views of a work vehicle 1 according to an embodiment of the present invention. The work vehicle 1 in this embodiment is a tractor. Note that the work vehicle 1 is not limited to a tractor, and may be another type of work vehicle.

[0025] In the following, the direction in which the work vehicle 1 moves forward and backward (left and right direction in Figs. 1 and 2) will be referred to as the front-rear direction, the direction horizontally perpendicular to the direction in which the work vehicle 1 moves forward and backward (the direction toward the front and rear in Figs. 1 and 2) as the left and right direction, and the direction vertically perpendicular to the direction in which the work vehicle 1 moves forward and backward (the up and down direction in Figs. 1 and 2) as the up and down direction. Additionally, the left and right direction of the work vehicle 1 will be referred to as the width direction of the vehicle body 2, the direction in the width direction of the vehicle body 2 that moves away from the center of the width direction will be referred to as the outside of the vehicle body 2, and the direction in the width direction of the vehicle body 2 that moves closer to the center of the width direction will be referred to as the inside of the vehicle body 2.

[0026] The work vehicle 1 comprises a vehicle body 2 and a traveling device 3. A front loader 4 is attached to the front of the vehicle body 2. The vehicle body 2 is configured to be capable of traveling. More specifically, a bonnet 5 is provided at the front of the vehicle body 2. An engine and the like are housed inside the bonnet 5. A clutch housing, a transmission case, a lifting device and the like are provided at the rear of the vehicle body 2. The traveling device 3 has front wheels 3F provided at the front of the vehicle body 2 and rear wheels 3R ​​provided at the rear of the vehicle body 2. The rear wheels 3R ​​are supported by an output shaft of a rear wheel differential. The rear wheels 3R ​​may be tires or crawlers.

[0027] A headlamp 6 is provided at the front of the bonnet 5. A cabin 7 in which a driver sits is provided at the top of the vehicle body 2. That is, the vehicle body 2 is equipped with the cabin 7. The vehicle body 2 is also equipped with a control device 2C that controls the traveling system and the working system. The control device 2C is equipped with a calculation unit (CPU, etc.), a storage unit (memory), etc., and executes various controls of the work vehicle 1 based on a program stored in the storage unit. More specifically, the control device 2C controls the traveling system and the working system of the work vehicle 1 based on operation signals when various operating devices (operating levers, switches, dials, etc.) installed in the cabin 7 are operated, and detection signals of sensors installed in various places on the vehicle body 2. For example, the control device 2C executes control of the engine speed based on detection signals from an accelerator pedal sensor, control related to the shifting of the transmission based on operation signals from the operating devices, control related to the operation of the front loader 4, etc.

[0028] As shown in Figs. 1 to 3, a work light 21 is provided on the upper part of the cabin 7. The work light 21 is a lighting lamp (first lighting lamp) provided on the vehicle body 2 and illuminates the front of the vehicle body 2. The work lights 21 are provided on the left and right front parts of the roof 7T of the cabin 7. In detail, the work lights 21 are provided on the left and right positions on the front part of the roof 7T that covers the seat 14 from above, and when turned on, illuminate the work area in front of the vehicle body 2 from a position above the viewpoint of the driver who is in the cabin 7. As shown in Fig. 4, the seat 14, the armrest 15, the steering wheel 16, the multifunction operation lever 17, and the loader operation lever 18 are provided inside (driver's seat) 7S of the cabin 7.

[0029] The seat 14 is provided in approximately the center between the left and right sides of the cabin 7, and the driver sits in the seat 14 facing forward. The armrest 15 is provided adjacent to one side of the seat 14. In this embodiment, the armrest 15 is provided on the right side of the seat 14. The armrest 15 extends in the front-to-rear direction of the seat 14.

[0030] <Front loader> As shown in FIG. 1, FIG. 2, and FIG. 5, the front loader 4 includes a mounting frame 8, a boom 9, a bucket 10, a boom cylinder 11, and a bucket cylinder 12. The front loader 4 is also provided with a loader light (second lighting) 22. In the present embodiment, the loader light 22 is provided on the lower edge 9U of the boom 9. However, the loader light 22 may be provided at a position other than the lower edge 9U of the boom 9 (for example, on the side of the boom 9). The front loader 4 is not limited to the present embodiment as long as it has the boom 9 and a working tool (bucket 10). The working tool is not limited to the bucket 10, and may be other types of working tools such as a pallet fork, a sweeper, a mower, and a snow blower.

[0031] 5, the mounting frame 8 has a left frame 8L and a right frame 8R. The left frame 8L and the right frame 8R are detachably attached to the left and right sides, respectively, of the vehicle body 2. The front loader 4 is attached to the vehicle body 2 via the mounting frame 8.

[0032] The boom 9 is provided on the vehicle body 2 so as to be able to swing up and down. The boom 9 has a left boom 9L arranged on the left side of the vehicle body 2 and a right boom 9R arranged on the right side of the vehicle body 2. In this embodiment, the left boom 9L and the right boom 9R are long, approximately rectangular tubular bodies, and are formed in an approximately V-shape in a side view with an obtuse angle at the approximately central portion in the front-rear direction. The left boom 9L and the right boom 9R are not limited to being approximately rectangular tubular bodies, and may have other shapes. The rear end of the left boom 9L is connected and supported so as to be able to swing around a pivot 23 provided on the left frame 8L. The rear end of the right boom 9R is connected and supported so as to be able to swing around a pivot 23 provided on the right frame 8R. The left boom 9L and the right boom 9R are connected to each other by a connecting frame 9J at a position closer to the front end than the center in the front-rear direction. As a result, the left boom 9L and the right boom 9R swing integrally with the pivot 23 as a fulcrum. In this embodiment, the boom 9 (left boom 9L, right boom 9R) is configured to be able to swing up and down within a range of approximately 90 degrees from a lower position where the bucket 10 is arranged below and in front of the vehicle body 2 to an upper position where the bucket 10 is arranged above the vehicle body 2.

[0033] A bucket (working tool) 10 is attached to the front of the boom 9. The bucket 10 is used primarily for scooping up and pushing forward earth and sand in a work area in front of the vehicle body 2, and is connected and supported by a connecting bracket 13 provided at the rear of the bucket 10 so as to be swingable around a pivot 24 provided at the front end of the boom 9.

[0034] The boom cylinders 11 are provided on the undersides of the left boom 9L and the right boom 9R, respectively, and connect the mounting frame 8 and the boom 9. One end of the boom cylinder 11 is rotatably supported on the mounting frame 8. The other end of the boom cylinder 11 is rotatably supported at a middle portion of the boom 9 in the front-to-rear direction. The boom cylinder 11 is constituted by a hydraulic cylinder, and swings the boom 9 upward about the pivot 23 by extending, and swings the boom 9 downward about the pivot 23 by shortening. In the case of this embodiment, a hydraulic hose 25 connected to the boom cylinder 11 is arranged along a lower edge portion (boom lower edge portion) 9U of the boom 9.

[0035] The bucket cylinders 12 are provided on the upper surfaces of the left boom 9L and the right boom 9R, respectively, and connect the bucket 10 to the booms 9. One end of the bucket cylinder 12 is rotatably supported by a connecting bracket 13 at the rear of the bucket 10. The other end of the bucket cylinder 12 is rotatably supported by a middle part of the boom 9 in the fore-and-aft direction. The bucket cylinder 12 is constituted by a hydraulic cylinder, and when it extends, it swings the bucket 10 downward about the pivot 24 (dumping operation), and when it contracts, it swings the bucket 10 upward about the pivot 24 (scooping operation).

[0036] <Second lighting> The loader light 22 is an illumination light (second illumination light) provided on the boom 9 to illuminate the periphery of the bucket 10. As shown in Figs. 5 to 7, the loader light 22 is provided on each of the left boom 9L and the right boom 9R. In detail, the loader light 22 is provided on each of the left boom 9L and the right boom 9R at approximately the center lower edge (boom lower edge 9U) in the front-to-rear direction, and illuminates the periphery of the bucket 10 from a position below the boom 9 when turned on.

[0037] As shown in Figures 7 and 8, the loader light 22 includes a light body 30, a light bracket (bracket) 31, a spacer 32, a bracket fixing bolt 33 and a bracket fixing nut 34, a light fixing bolt 35 and a light fixing nut 36.

[0038] The light body 30 has a light emitting portion 30A, a cord connection terminal 30B, and a bracket connection portion 30C. A bearing hole 30D is provided through the bracket connection portion 30C from left to right. The light body 30 is formed in a generally rectangular shape when viewed from the front. The light emitting portion 30A is provided on the front portion of the light body 30. The cord connection terminal 30B is provided on the rear portion of the light body 30. The bracket connection portion 30C is provided on the upper portion of the light body 30. A power cable 26 that supplies electricity to the light body 30 is connected to the cord connection terminal 30B. In this embodiment, the power cable 26 is arranged from the cord connection terminal 30B along the boom lower edge portion 9U and is connected to a power supply device mounted on the vehicle body 2.

[0039] The light bracket 31 is connected to the boom 9 and supports the loader light 22. The light bracket 31 is provided with flanges 31F, 31B on the outer edge of the surface facing the boom 9 to prevent the cables from contacting the loader light 22. The flanges 31F, 31B extend outwardly from the outer edge at an incline in a direction to widen a gap S2 described later.

[0040] More specifically, as shown in FIG. 8, the light bracket 31 has an upper plate 31T, a left side plate 31L, a right side plate 31R, a front plate 31F, and a rear plate 31B. The upper plate 31T is formed in a substantially rectangular plate shape long in the front-rear direction, and is disposed at a position facing the lower end of the boom lower edge 9U. The left side plate 31L is formed in a substantially trapezoidal plate shape in a side view with a rear edge shorter than the front edge, and is extended substantially vertically downward from the left edge of the upper plate 31T. The right side plate 31R is formed in a substantially trapezoidal plate shape in a side view with a rear edge shorter than the front edge, and is extended substantially vertically downward from the right edge of the upper plate 31T. In this way, the left side plate 31L and the right side plate 31R are extended substantially parallel to each other with a predetermined width of gap S1 along the left and right outer edges of the upper plate 31T.

[0041] The front plate 31F is formed in a substantially rectangular plate shape and extends obliquely downward and forward from the front edge (outer edge) of the upper plate 31T (surface facing the boom 9). The rear plate 31B is formed in a substantially rectangular plate shape and extends obliquely downward and rear from the rear edge (outer edge) of the upper plate 31T (surface facing the boom 9). In this way, the front plate 31F and the rear plate 31B are respectively extended obliquely downward in the extension direction of the boom 9 from the front and rear outer edges of the upper plate 31T so as to gradually move away from the boom lower edge 9U.

[0042] The upper plate 31T is provided with a generally circular shaft insertion hole 37A. The shaft insertion hole 37A is provided at a position rearward of the center of the upper plate 31T in the front-rear direction. The bracket fixing bolt 33 is inserted into the shaft insertion hole 37A from above the light bracket 31.

[0043] The left side plate 31L and the right side plate 31R are provided with a generally circular shaft insertion hole 37B. The shaft insertion holes 37B are provided facing each other at positions closer to the front than the center in the front-rear direction of the left side plate 31L and the right side plate 31R. The light fixing bolt 35 is inserted into each of the shaft insertion holes 37B from the outer side of the light bracket 31.

[0044] A substantially circular harness fixing hole 37C is provided in the left side plate 31L. The harness fixing hole 37C is provided at a position rearward of the center in the front-rear direction of the left side plate 31L. In the present embodiment, a harness (not shown) for fixing a cable is attached to the harness fixing hole 37C, and the power cable 26 is connected and held to the light bracket 31 by the harness. The power cable 26 may be held to the light bracket 31 by being inserted through the harness fixing hole 37C.

[0045] The left side plate 31L and the right side plate 31R are provided at their respective approximately central portions in the front-rear direction with punch holes 37D each having a generally trapezoidal plate shape in a side view with a rear edge shorter than the front edge. In the present embodiment, the left boom 9L and the right boom 9R are also provided at their respective approximately central portions in the front-rear direction with recesses 38 each having a generally trapezoidal plate shape in a side view with a rear edge shorter than the front edge (see FIG. 6). The recesses 38, punch holes 37D, and the left side plate 31L and the right side plate 31R are each made to have a generally similar shape, thereby unifying the design in the vicinity of the middle portion of the boom 9. In addition, when mounting the bracket 31, the bracket 31 can be mounted accurately without making a mistake in the front-rear direction by mounting the bracket 31 while comparing the shape of the recess 38 with the shape of the punch holes 37D, or the shape of the recess 38 with the shape of the left side plate 31L and the right side plate 31R.

[0046] The left-right width dimension (inner dimension) of the gap S1 between the left and right side plates 31L, 31R is set to be approximately the same as the left-right width dimension of the bracket connecting portion 30C of the light body 30. The bracket connecting portion 30C is inserted into the gap S1 and is sandwiched from the left and right by the side plates 31L, 31R.

[0047] The spacer 32 is a vertically long cylindrical body, and is fitted around the bolt shaft 33S of the bracket fixing bolt 33. The spacer 32 is disposed between the boom lower edge 9U and the upper plate 31T of the light bracket 31 at a position where the axis passing through the center of the hollow portion 32D of the spacer 32 is coaxial with the shaft insertion hole 37A of the upper plate 31T.

[0048] The bracket fixing bolt 33 has a substantially circular bolt head 33H and a bolt shaft 33S having a diameter smaller than that of the bolt head 33H. An engagement protrusion 33P having a substantially square shape when viewed from below is provided on the lower surface of the bolt head 33H. The bolt shaft 33S is formed longer than the vertical length of the spacer 32 that is annularly mounted on the outer periphery, and protrudes downward from the lower end of the spacer 32. The engagement protrusion 33P is formed to have a width substantially equal to the diameter of the bolt shaft 33S. The bracket fixing bolt 33 is connected and held in a bolt mounting hole 39 provided in the boom lower edge portion 9U. More specifically, the bolt mounting hole 39 has a circular hole 39A having a diameter larger than that of the bolt head 33H, and an elongated hole 39B extending forward from the peripheral portion of the circular hole 39A. The elongated hole 39B is formed to have a width substantially equal to that of the engagement protrusion 33P. When mounting the bracket fixing bolt 33 in the bolt mounting hole 39, the bolt head 33H is inserted into the circular hole 39A from below, and then slid forward along the elongated hole 39B. This causes the bolt head 33H to engage with the side edge of the elongated hole 39B from above, and the engaging protrusion 33P is inserted into the elongated hole 39B. As a result, the bracket fixing bolt 33 is connected and held in a non-rotational state with respect to the boom lower edge 9U.

[0049] The spacer 32 is fitted from below around the bolt shaft 33S of the bracket fixing bolt 33 connected to the boom lower edge 9U as described above. The light bracket 31 is screwed from below onto the bolt shaft 33S protruding downward from the hollow portion 32D of the spacer 32. The bracket fixing nut 34 is screwed from below onto the bolt shaft 33S protruding downward from the shaft insertion hole 37A of the light bracket 31. As a result, as shown in FIG. 7, a gap S2 is defined between the opposing surfaces of the boom 9 and the light bracket 31, through which cables arranged along the boom 9 can be inserted. In detail, the light bracket 31 is fixed to the boom lower edge 9U with a predetermined gap S2 remaining between the opposing surfaces of the upper plate 31T and the boom lower edge 9U, and cables such as the hydraulic hose 25 and the power cable 26 arranged along the boom lower edge 9U are extended to the vehicle body 2 side through the gap S2. In this way, the spacer 32 forms a constant gap S2 between the light bracket 31 and the lower edge 9U of the boom 9, and by passing the hydraulic hose 25 through this gap S2, it is possible to prevent the hydraulic hose 25 from being compressed between the light bracket 31 and the lower edge 9U of the boom 9, thereby preventing the flow of hydraulic oil from being obstructed.

[0050] The light fixing bolt 35 has a bolt head 35H and a bolt shaft 35S. The bolt shaft 35S is inserted from the outside into a shaft insertion hole 37B provided in the side plates 31L, 31R of the light bracket 31. The bracket connecting portion 30C of the light body 30 is inserted from below the light bracket 31 into the gap S2 between the side plates 31L, 31R at a position where the bearing hole 30D is coaxial with the shaft insertion hole 37B of the side plates 31L, 31R. Therefore, the bolt shaft 35S is inserted into the bearing hole 30D of the bracket connecting portion 30C through the shaft insertion hole 37B. The light fixing nut 36 is screwed from the side to the bolt shaft 35S protruding outward from one of the shaft insertion holes 37B. As a result, the light body 30 is supported so as to be swingable back and forth around the bolt shaft 35S relative to the light bracket 31. Furthermore, by increasing the fastening force of the light fixing nut 36 to the bracket fixing bolt 33, the bracket connecting portion 30C is tightly clamped from the left and right directions by the left and right side plates 31L, 31R. As a result, the light body 30 is fixed at a predetermined angle to the light bracket 31. In this way, by arbitrarily changing the angle of the light body 30, the lighting direction of the loader light 22 can be adjusted in the fore-and-aft direction of the bucket 10. That is, the loader light 22 is provided so that the lighting direction can be adjusted in the fore-and-aft direction of the bucket (work tool) 10.

[0051] <Operating device> The steering wheel 16 is provided in the driver's seat section 7S, and is a steering device for controlling the traveling direction of the work vehicle 1. As shown in Fig. 4, the steering wheel 16 is rotatably connected to and supported by a steering post 19 provided in front of the seat 14, and the turning angle of the front wheels 3F is adjusted by turning the steering wheel 16 left and right.

[0052] The multifunction operation lever 17 and the loader operation lever 18 are disposed on one side (right side) of the seat 14 provided on the vehicle body 2 of the work vehicle 1, and at a position where the driver sitting on the seat 14 can hold and operate the grips 41, 43 with the hand on the one side (right side). In detail, the multifunction operation lever 17 is connected to a base 27 provided on the upper front end of the armrest 15 so as to be able to swing back and forth. The loader operation lever 18 is connected to a base 28 provided on the right side of the front end of the armrest 15 so as to be able to swing back and forth. This allows the driver to operate the multifunction operation lever 17 and the loader operation lever 18 in a position where his / her right arm is placed on the armrest 15. As a result, the driver's fatigue during driving is reduced. In the present embodiment, a work light switch (not shown) for manually turning on and off the work light 21 is provided at at least one or more locations on the steering post 19, the armrest 15, the multifunction operation lever 17, and / or the loader operation lever 18.

[0053] The multifunction operation lever 17 is provided in the driver's seat section 7S of the work vehicle 1, and is an operation device (first operation device) for operating the vehicle body 2. The multifunction operation lever 17 is equipped with a grip 41 which is a portion grasped by the driver, a lever shaft (not shown) which supports the grip 41, and a plurality of operation switches 42. The lever shaft of the multifunction operation lever 17 extends into the inside of the pedestal 27. The lever shaft of the multifunction operation lever 17 is erected inside the pedestal 27 so as to be swingable back and forth. The transmission mounted on the vehicle body 2 is configured to change the gear ratio based on an operation signal when the lever shaft is operated to swing back and forth.

[0054] The grip 41 of the multifunction operation lever 17 is provided on the upper extension of a lever shaft (not shown). As shown in Figs. 9 to 11, the grip 41 is formed in an irregular block shape with a width dimension larger than the width dimension from front to back, and is provided on the tip of the lever shaft (not shown). The surface portion (grip surface portion) 41A of the grip 41 is inclined downward from the right front portion to the left rear portion so as to face the driver seated on the seat 14. The grip surface portion 41A is provided with a grip portion 41R and an operation panel portion 41L. The operation panel portion 41L is formed in a substantially flat shape and is provided on the left side (seat 14 side) across the approximate center between the left and right sides of the grip surface portion 41A. The grip portion 41R is formed in a protruding shape of a substantially arcuate convex curved surface, and is provided on the right side (opposite the seat 14 side) across the approximate center between the left and right sides of the grip surface portion 41A. The edge (grip front edge) 41B of grip 41R extending from the front to the right side is formed in a generally arc shape when viewed from above. The side surface (grip side surface) 41C of grip 41R on the operation panel 41L side is formed to stand up along the right side of operation panel 41L. In the case of this embodiment, the basic gripping state when operating multifunction operation lever 17 is to place the palm of the hand on grip 41R, place the thumb along grip side surface 41C, and hold grip 41 diagonally from the front right side while hooking the four fingers other than the thumb on grip front edge 41B.

[0055] The operation switches 42 are provided on the grip 41 and are used to execute various operations on the vehicle body 2. A plurality of operation switches 42 are provided on an operation panel section 41L of the grip 41. Operation switches 42 are also provided on a gripping portion side section 41C of the grip 41 and a back section (grip back section) 41D of the grip 41, respectively.

[0056] The operation switches 42 provided on the operation panel section 41L include a shuttle changeover switch (first shuttle changeover switch) 42a for manually switching between forward and reverse travel of the work vehicle 1, a pumper switch 42b for manually operating the lifting and lowering of a work tool attached to a lifting device (not shown) at the rear of the vehicle body 2, and an automatic gear changeover switch 42c for manually switching between an automatic gear change mode and a manual gear change mode. In the automatic gear change mode, an optimal vehicle gear is automatically selected by electronic control within a range of vehicle gears preset by the driver. In the manual gear change mode, the driver can manually switch vehicle gears.

[0057] The operation switch 42 provided on the grip side surface 41C is a shift assist switch 42d for manually operating the switching of the shift unit of the transmission. In this embodiment, the transmission has a main shift unit that suppresses shocks when changing gear stages by proper control of hydraulic pressure, and a normal synchromesh type sub-shift unit, and a shift operation involving switching of the sub-shift unit can be performed by swinging the multi-function operation lever 17 back and forth while pressing the shift assist switch 42d. On the other hand, if the multi-function operation lever 17 is swinged back and forth without pressing the shift assist switch 42d, a shift operation of only the main shift unit can be performed without switching of the sub-shift unit.

[0058] The operation switch 42 provided on the grip back surface 41D is a shuttle check switch (first shuttle check switch) 42e for manually operating check and release of the switching operation by the shuttle changeover switch 42a. In the case of this embodiment, the forward and reverse travel of the work vehicle 1 is switched by pressing the shuttle changeover switch 42a while pressing the shuttle check switch 42e. Therefore, even if the shuttle changeover switch 42a is pressed without pressing the shuttle check switch 42e, the forward and reverse travel of the work vehicle 1 is not switched.

[0059] The shuttle changeover switch 42a, the pumper switch 42b, the automatic speed changeover switch 42c, and the speed change assist switch 42d are provided on a surface portion (grip surface portion) 41A of the grip 41. The shuttle check switch 42e is provided on a back portion (grip back portion) 41D of the grip 41.

[0060] The shuttle changeover switch 42a is a seesaw switch, and is provided on the right side (the grip 41R side) of the center between the left and right sides of the upper half of the operation panel 41L so that it can be swung back and forth. The pump switch 42b is a seesaw switch, and is provided on the approximate center between the left and right sides of the upper half of the operation panel 41L so that it can be swung back and forth. The automatic speed changeover switch 42c is a push switch, and is provided on the left side (the opposite side to the grip 41R) of the center between the left and right sides of the upper half of the operation panel 41L. The upper half of the operation panel 41L is located at a position where the fingertip of the thumb can fully reach when the grip 41 is held in the basic grip. That is, the shuttle changeover switch 42a, the pump switch 42b, and the automatic speed changeover switch 42c are provided at positions where they can be operated by the thumb of the hand holding the grip 41 (grip 41R). Therefore, the shuttle changeover switch 42 a, the pumper switch 42 b, and the automatic speed changeover switch 42 c can all be appropriately operated with the thumb while gripping the grip 41.

[0061] The gear shift assist switch 42d is a push switch, and is provided in approximately the center between the front and rear of the grip side surface 41C. In this embodiment, the center between the front and rear of the grip side surface 41C is the part that is most easily touched by the fingertip of the thumb when gripping the grip 41 in the basic gripping position. In other words, the gear shift assist switch 42d is provided in a position that can be operated by the thumb of the hand holding the grip 41 (grip portion 41R). Therefore, the gear shift assist switch 42d can be appropriately operated with the thumb while gripping the grip 41.

[0062] The shuttle check switch 42e is a push switch, and is provided at a position near the front end of the grip front edge 41B on the grip back surface 41D. That is, the shuttle check switch 42e is provided at a position where it can be operated with the fingertips of the fingers (index finger or middle finger) other than the thumb of the hand holding the grip 41 (grip 41R). Therefore, the shuttle check switch 42e can be appropriately operated with the index finger or middle finger while holding the grip 41.

[0063] The loader operation lever 18 is provided in the driver's seat section 7S of the work vehicle 1, and is an operation device (second operation device) for operating the front loader 4 mounted on the vehicle body 2 of the work vehicle 1. That is, the loader operation lever 18 is a boom operation section for manually operating the boom 9. The loader operation lever 18 includes a grip 43 to be held by the driver, a lever shaft 44 supporting the grip 43, and a plurality of operation switches 45. The lever shaft 44 of the loader operation lever 18 is extended to the driver's seat section 7S. The lever shaft 44 is supported inside the base 28 so as to be swingable back and forth. In the case of this embodiment, the lever shaft 44 is a substantially S-shaped cylinder that extends upward from inside the base 28, extends substantially horizontally toward the seat 14 in the middle, and further extends upward. An upper extension (tip) 44A of the lever shaft 44 is inserted and fixed to the grip 43 of the loader operation lever 18. The lower extension 44B of the lever shaft 44 is connected and supported by a link mechanism inside the base 28. The boom 9 of the front loader 4 is configured to move up and down based on an operation signal generated when the lever shaft 44 is operated to swing back and forth.

[0064] 10 and 11, the grip 43 of the loader operation lever 18 is provided at a position above the grip 41 of the multifunction operation lever 17. Also, as shown in Fig. 4, the grip 43 of the loader operation lever 18 is provided at a position rearward of the grip 41 of the multifunction operation lever 17. That is, the grip 43 of the loader operation lever 18 and the grip 41 of the multifunction operation lever 17 are arranged side by side in the front-to-rear direction.

[0065] The grip 43 of the loader operation lever 18 is provided on the upper extension 44A of the lever shaft 44. As shown in Figs. 9 to 11, the grip 43 is formed in a generally inverted L-shape extending to the upper left of the driver's seat section 7S. In detail, the grip 43 has a generally vertically elongated columnar base end (grip base end) 43V extending upward from the upper extension 44A of the lever shaft 44, and a generally horizontally elongated columnar lateral extension (grip lateral extension) 43W extending from the upper end of the grip base end 43V to the seat 14 side of the driver's seat section 7S. In the case of this embodiment, the basic gripping state when operating the loader operation lever 18 is to cover the upper approximately half of the outer peripheral surface section (grip outer peripheral surface) 43A of the grip lateral extension 43W with the palm, and to grip the grip lateral extension 43W from above to the side so that the thumb and other four fingers are aligned along the lower approximately half of the grip lateral surface 43A. As shown in Fig. 11, the grip horizontal extension 43W is inclined at a predetermined angle to the left (seat 14 side) with respect to the axis CL passing through the center of the upper extension 44A of the lever shaft 44 at an angle that is upward from the horizontal direction. That is, the grip horizontal extension 43W of the loader operation lever 18 is inclined so as to face upward as it extends from the upper position (upper end of the grip base end 43V) of the upper extension (tip portion) 44A of the lever shaft 44 toward the seat 14 side of the driver's seat portion 7S. This allows the driver to hold the grip 43 in a natural posture with the wrist twisted sideways and slightly outward (to the right side).

[0066] As shown in Fig. 9 and Fig. 11, the grip outer peripheral surface 43A is formed in a substantially arcuate concave curved shape so that the right end of the upper half (grip top surface) 43S shrinks toward the center, and the center is formed in a substantially arcuate convex curved shape so that the center bulges toward the outer peripheral side. That is, the grip outer peripheral surface 43A is formed in a streamlined shape such that the grip top surface 43S, which is the surface on which the palm is placed, gradually sinks from the right end to the left, turns into a gently raised surface at the center and bulges, and then gradually sinks again toward the left, and reaches the left end. As a result, when the grip 43 is gripped, the vicinity of the little finger ball of the hand abuts along the concave curved surface on the right side of the grip top surface 43S and engages with the right end of the grip top surface 43S from the left, and the vicinity of the base of the index finger abuts along the concave curved surface on the left side of the grip top surface 43S and engages with the left end of the grip top surface 43S from the right. As a result, the hand is less likely to slip left and right (in the direction in which the grip horizontal extension portion 43W extends), making it possible to reliably operate the loader operation lever 18. In addition, since there is no need to tightly grip the grip 43 when operating it, hand fatigue is also reduced.

[0067] The grip outer peripheral surface 43A is provided with an anti-slip portion 43D. In this embodiment, the anti-slip portion 43D is provided over substantially the entire surface of the upper approximately half surface (grip upper surface) 43S of the grip outer peripheral surface 43A that the palm contacts when the grip 43 is gripped, and is not provided on the lower approximately half surface of the grip outer peripheral surface 43A that the fingertips contact. The anti-slip portion 43D is formed of a material having an anti-slip function such as rubber, and generates a larger friction force between the palm gripping the grip horizontal extension portion 43W than the lower approximately half surface of the grip outer peripheral surface 43A on which the anti-slip portion 43D is not provided. This makes it difficult for the hand gripping the grip 43 to slip in the extension direction or circumferential direction, allowing for more reliable operation of the loader operation lever 18. In addition, the anti-slip portion 43D does not hinder the movement of the fingers when operating the operation switch 45 provided on the grip 43.

[0068] A plurality of irregularities are formed on the surface of the non-slip portion 43D. In the case of this embodiment, the above-mentioned irregularities are formed in the shape of intersecting grooves extending diagonally in the circumferential direction at a predetermined interval. This can further prevent the hand holding the grip 43 from slipping in the extension direction or the circumferential direction. The non-slip portion 43D is formed by attaching or embedding a member formed of a material having a non-slip function to the grip outer peripheral surface 43A. Note that, as long as the slippage of the hand holding the grip 43 can be sufficiently prevented, the non-slip portion 43D may be formed of the same material as the grip outer peripheral surface 43A, or may not have irregularities on its surface. In addition, the non-slip portion 43D may be formed integrally with the grip outer peripheral surface 43A, rather than being separate from the grip outer peripheral surface 43A. In addition, the above-mentioned irregularities are not limited to intersecting grooves, and may be other shapes such as a wave shape, a plurality of parallel ribs, a group of dimples, a group of small protrusions, irregular undulations, or a combination thereof.

[0069] As shown in Figs. 9 to 11, the grip outer peripheral surface 43A is provided with a raised portion 43E. More specifically, the raised portion 43E capable of hooking and holding the thumb of the hand gripping the grip 43 is provided at a position closer to the tip (grip tip surface) 43T than the middle position in the extension direction of the grip horizontal extension portion 43W on the outer peripheral surface portion (grip outer peripheral surface) 43A of the grip horizontal extension portion 43W. The raised portion 43E is formed in a mountain shape in vertical section and extends in the circumferential direction along the grip outer peripheral surface 43A. The raised portion 43E is provided adjacent to the right side of the outer peripheral edge portion (grip tip edge portion) 43C of the grip tip surface 43T. In this embodiment, the raised portion 43E extends over approximately the entire circumference of the grip outer peripheral surface 43A. Therefore, when the grip horizontal extension portion 43W is gripped, the thumb and index finger of the hand are likely to come into contact with the raised portion 43E. This allows the driver to easily grasp the position of the operation switch 45 provided on the grip outer peripheral surface 43A by only the sense of touch of the thumb and index finger without visually checking the grip 43. Also, while gripping the grip 43, the area from the base of the thumb (thenar eminence) to the fingertip can be hooked on the upper part of the raised portion 43E. As a result, hand fatigue is further reduced.

[0070] The surface (finger rest surface) 43F between the raised portion 43E at the lower left of the grip outer peripheral surface 43A and the grip tip edge portion 43C is formed in a substantially arc-shaped concave curved shape. Therefore, the tip of the thumb hooked on the raised portion 43E is supported by the finger rest surface 43F. This makes it difficult for the driver's hand to get tired even if the driver hooks the thumb on the raised portion 43E for a long time.

[0071] The tip surface portion (grip tip surface) 43T of the grip horizontal extension portion 43W is inclined from the front edge side, which is the tip side of the hand gripping the grip horizontal extension portion 43W, toward the rear edge side on the opposite side. More specifically, the grip tip surface 43T is inclined from the left front to the right rear so as to face the driver seated in the seat 14. This allows the driver to easily operate the operation switch 45 provided on the grip tip surface 43T with the tip of his thumb.

[0072] The operation switch 45 is provided on the grip 43 and is an operation switch for executing various operations of the work vehicle 1 (the vehicle body 2 and the front loader 4). A plurality of operation switches 45 are provided on each of the grip tip surface 43T, the grip outer circumferential surface 43A, and the grip base end portion 43V.

[0073] The operation switch 45 provided on the grip tip surface 43T includes a third function switch 45b as an implement operation switch to which an operation function of an implement (such as the bucket 10) of the front loader 4 can be assigned, a speed change switch 45d for manually changing the gear ratio of the speed change device, and a loader light switch (second illumination switch) 45f for manually turning on and off the loader light (second illumination lamp) 22. The third function switch 45b is a switch to which an operation function of an implement attached instead of or in addition to the bucket 10 of the front loader 4 can be assigned.

[0074] The operation switch 45 provided on the grip outer peripheral surface 43A includes a shuttle changeover switch (second shuttle changeover switch) 45a for manually switching between forward and reverse of the work vehicle 1, a fourth function switch 45c as a work tool operation switch to which an operation function of the work tool (bucket 10, etc.) of the front loader 4 can be assigned, and a shuttle check switch (second shuttle check switch) 45e for manually checking and releasing the check on the switching operation by the shuttle changeover switch 45a. The fourth function switch 45c is a switch to which an operation function of the work tool attached instead of or in addition to the bucket 10 of the front loader 4 can be assigned.

[0075] The operation switch 45 provided on the grip base end portion 43V includes a first option switch 45g and a second option switch 45h to which predetermined functions of the front loader 4 can be assigned.

[0076] Of the operation switches 45, the third function switch 45b, the speed change switch 45d, and the loader light switch 45f are provided on the tip surface portion (grip tip surface) 43T of the grip 43. The loader light switch 45f may be provided on the grip base end portion 43V. Also, the operation function for manually turning on and off the loader light (second illumination lamp) 22 may be assigned to the first option switch 45g or the second option switch 45h, instead of the loader light switch 45f.

[0077] The third function switch 45b is a push switch and is provided in a pair vertically adjacent to each other at a position near the front left of the grip tip surface 43T. The speed change switch 45d is a push switch and is provided in a pair vertically adjacent to each other at a position approximately in the center between the left and right of the grip tip surface 43T. The loader light switch 45f is a push switch and is provided in a position near the rear right of the grip tip surface 43T.

[0078] In this embodiment, the grip tip surface 43T is located at a position where the fingertip of the thumb can reach when the grip horizontal extension portion 43W is gripped in the basic gripping manner. That is, the third function switch 45b, the speed change switch 45d, and the loader light switch 45f are provided at positions where they can be operated by the thumb of the hand gripping the grip horizontal extension portion 43W. Therefore, the third function switch 45b, the speed change switch 45d, and the loader light switch 45f can all be appropriately operated by the thumb while gripping the grip 43. The third function switch 45b arranged on the grip tip surface 43T is used more frequently than the other operation switches 45 when working with the front loader 4.

[0079] Of the operation switches 45, the shuttle changeover switch 45a, the fourth function switch 45c, and the shuttle check switch 45e are provided on the outer circumferential surface portion (grip outer circumferential surface) 43A of the grip 43.

[0080] The shuttle changeover switch 45a is a push switch and is provided at a position near the left end (tip) of the lower part of the grip outer peripheral surface 43A. In this embodiment, the shuttle changeover switch 45a is provided on the finger placement surface 43F of the grip outer peripheral surface 43A. The shuttle changeover switch 45a is also provided below and adjacent to the third function switch (tool operation switch) 45b. The fourth function switch 45c and the shuttle check switch 45e are both push switches and are provided side by side at a position near the front left end (tip) of the grip outer peripheral surface 43A. The shuttle check switch 45e is provided to the left (tip side) of the fourth function switch 45c. In this embodiment, only the shuttle changeover switch 45a is provided on the finger placement surface 43F, but any of the above-mentioned operation switches 45 or an operation switch 45 having another function may be provided as necessary.

[0081] In this embodiment, the left lower part (finger placement surface 43F) of the grip outer peripheral surface 43A is the part that is most easily touched by the fingertip of the thumb when the grip horizontal extension 43W is gripped in the basic gripping manner. That is, the shuttle changeover switch 45a is provided at a position that can be operated by the thumb of the hand gripping the grip horizontal extension 43W. Therefore, the shuttle changeover switch 45a can be quickly and appropriately operated by the thumb while gripping the grip 43. In addition, the left front part of the grip outer peripheral surface 43A (left front position of the front edge of the non-slip part 43D) is the part that is most easily touched by the fingertip of the index finger or middle finger when the grip horizontal extension 43W is gripped in the basic gripping manner. That is, the fourth function switch 45c and the shuttle check switch 45e are provided at a position that can be operated by the fingertip of the other fingers (index finger or middle finger) other than the thumb of the hand gripping the grip horizontal extension 43W. Therefore, the fourth function switch 45c and the shuttle check switch 45e can be quickly and appropriately operated with the index finger or middle finger while gripping the grip 43. Also, a substantially hemispherical protrusion is formed in the center of the operation surface portion 48 of the shuttle check switch 45e. This allows the driver to easily grasp the position of the shuttle check switch 45e by touch alone with the index finger or middle finger without having to visually check the grip 43. The shuttle changeover switch 45a and the fourth function switch 45c arranged on the grip outer peripheral surface 43A are used more frequently than the other operation switches 45 when working with the front loader 4.

[0082] Of the operation switches 45, a first option switch 45g and a second option switch 45h are provided at the grip base end portion 43V.

[0083] The first option switch 45g and the second option switch 45h are both push switches, and are arranged vertically on the rear surface of the grip base end 43V. In this embodiment, the rear surface of the grip base end 43V is located at a position where the fingertip of the thumb can reach it by lowering the thumb while gripping the grip horizontal extension 43W in the basic gripping manner. In other words, the first option switch 45g and the second option switch 45h are provided at a position where they can be operated by the thumb of the hand placed on the grip horizontal extension 43W. Therefore, both the first option switch 45g and the second option switch 45h can be appropriately operated by the thumb while gripping the grip 43.

[0084] The shuttle changeover switch 45a of the loader operation lever 18 has a common function with the shuttle changeover switch 42a provided on the multifunction operation lever 17, and the shuttle check switch 45e of the loader operation lever 18 has a common function with the shuttle check switch 42e provided on the multifunction operation lever 17. Therefore, while gripping the loader operation lever 18, the work vehicle 1 can be switched between forward and reverse travel by pressing the shuttle check switch 45e with the index finger and the shuttle changeover switch 45a with the thumb.

[0085] As shown in Figs. 12A to 13B, the grip 43 of the loader operation lever 18 is provided with a recess 47 recessed from the surface toward the inside. More specifically, the recess 47 is provided on the mounting portion of each operation switch 45 on the grip tip surface 43T, the grip outer peripheral surface 43A, and the grip base end 43V. As shown in Figs. 12A and 12B, the recess 47a provided on each mounting portion of the third function switch 45b, the first option switch 45g, and the second option switch 45h among the operation switches 45 is formed in a substantially E-shaped cross section. The third function switch 45b is provided in the recess 47a with the operation surface portion 48 protruding outward from the grip tip surface 43T. Also, the first option switch 45g and the second option switch 45h are provided in the recess 47a with the operation surface portion 48 protruding outward from the surface of the grip base end 43V.

[0086] On the other hand, as shown in FIG. 13A and FIG. 13B, the recesses 47b provided on the mounting parts of the speed change switch 45d, the shuttle changeover switch 45a, the fourth function switch 45c, the shuttle check switch 45e, and the loader light switch 45f among the operation switches 45 are formed in a substantially mortar shape. The speed change switch 45d is provided in the recess 47b so that the operation surface part 48 does not protrude outside the grip tip surface 43T. Similarly, the shuttle changeover switch 45a, the fourth function switch 45c, the shuttle check switch 45e, and the loader light switch 45f are also provided in the recess 47b so that the operation surface part 48 does not protrude outside the surface of the grip 43. Therefore, when the grip 43 is gripped, the fingers do not inadvertently touch the operation switch 45. This prevents erroneous operation of the vehicle body 2 and the front loader 4. It also prevents the operation switch 45 from impairing the operation feeling when operating the loader operation lever 18.

[0087] <Control device> As shown in FIG. 14, the control device 2C is connected to a plurality of detection devices 50 provided at various locations on the work vehicle 1 and detecting various states, and switches of the operation device. The detection devices 50 are, for example, an engine rotation sensor 50a that detects the engine speed, a vehicle speed sensor 50b that detects the traveling speed of the work vehicle 1, an accelerator pedal sensor 50c that detects the amount of accelerator operation, a steering angle sensor 50d that detects the steering angle of the steering wheel 16, and a boom position sensor 50e that detects the amount of extension of the boom cylinder 11. The boom position sensor 50e functions as a boom position detection unit that detects the position of the boom 9. The switches of the operation device are, for example, the operation switch 42 of the multifunction operation lever 17, the operation switch 45 of the loader operation lever 18, and the like. However, the detection devices 50 and the operation switches 42, 45 are merely examples, and are not limited to the above-mentioned sensors and switches.

[0088] The control device 2C also includes an operation control unit 51 that controls the operation of the work vehicle 1 and the front loader 4 based on signals from the detection device 50 and the operation switches 42, 45, and a memory unit 52 that stores various programs and data tables related to the operation of the work vehicle 1 and the front loader 4. In the case of this embodiment, the operation control unit 51 includes a lighting control unit 51a that controls the lighting operation of the work light (first lighting lamp) 21 and the loader light (second lighting lamp) 22.

[0089] The lighting control unit 51a can execute lighting restriction to automatically turn off or dim the work light (first lighting) 21 when the loader light (second lighting) 22 is in a lighting state. The lighting control unit 51a controls turning on and off the work light 21 and the loader light 22 based on a signal indicating the lighting state of the work light 21, a signal indicating the lighting state of the loader light 22, a position detection signal output from the boom position sensor 50e, an operation signal output in response to the operation of the loader light switch 45f, etc. That is, the lighting control unit 51a controls the lighting state of the work light 21 and the loader light 22 based on the operation of the loader light switch 45f and the extension amount of the boom cylinder 11 (height position of the boom 9).

[0090] In this embodiment, the lighting control unit 51a switches between execution and release of the lighting restriction in response to position detection information from the boom position sensor (boom position detection unit) 50e. In detail, the lighting control unit 51a calculates the actual extension amount of the boom cylinder 11 based on the position detection signal output from the boom position sensor 50e and a data table stored in the storage unit 52, and determines the height position of the boom 9 based on the actual extension amount. In addition, when the lighting control unit 51a detects an ON operation of a work light switch (not shown), it turns on the work light 21, and when the lighting control unit 51a detects an ON operation of the loader light switch 45f, it turns on the loader light 22.

[0091] Furthermore, the lighting control unit 51a executes the above-mentioned lighting restriction when the boom 9 is raised to a predetermined position or higher. In detail, when an on operation of a work light switch (not shown) is detected or after the work light 21 is turned on, if the boom 9 is raised to a predetermined position or higher and the above-mentioned actual extension amount is a predetermined threshold value or more, the lighting control unit 51a executes lighting restriction to maintain the work light 21 in an off state (turns it off if it is on).

[0092] On the other hand, when the boom 9 is lowered below the predetermined position, the lighting control unit 51a releases the lighting restriction. In detail, when the boom 9 is lowered below the predetermined position and the actual extension amount is less than a predetermined threshold, the lighting control unit 51a turns on the work light 21 (if it is on, it keeps it on). That is, the lighting restriction is released.

[0093] The predetermined position can be set at a position where the height of at least a part of the boom 9 is the same as the height of the loader light (first illuminating lamp) 21. In the case of this embodiment, the position of the boom 9 that is the reference when switching between the illumination restriction and the restriction release is set to approximately the upper center (upper edge of the bent portion) 9T in the front-to-rear direction of the boom 9, and the height position (threshold value) where the switching is performed is set to a position where the upper edge 9T of the bent portion is the same height as the work light 21 (horizontally in front of the work light 21).

[0094] 2, when the upper edge 9T of the bent portion of the boom 9 is raised above the height position of the work light 21, the restriction on turning on the work light 21 is implemented, and only the loader light 22 is turned on. As a result, the front of the boom 9, i.e., the periphery of the bucket 10, is illuminated by the loader light 22. On the other hand, when the upper edge 9T of the bent portion of the boom 9 is lower than the height position of the work light 21, as shown in FIG. 1, the restriction on turning on the work light 21 is released, and both the work light 21 and the loader light 22 are turned on. As a result, the work area in front of the vehicle body 2 and the periphery of the bucket 10 are illuminated by the work light 21 and the loader light 22.

[0095] <Other embodiments> In the above embodiment, the work light 21 is configured to be turned off if the boom 9 is raised to a predetermined position or higher when the loader light 22 is on, but instead of turning off the work light 21 completely, the illuminance of the work light 21 may be reduced (dimmed) to a degree that does not impair visibility around the bucket 10 due to light reflected by the boom 9 or the connecting frame 9J. In other words, in the present invention, the lighting control unit 51a is capable of executing a lighting restriction that automatically dims the work light 21 when the loader light 22 is on.

[0096] In the above embodiment, the lighting restriction and release of the restriction of the work light 21 are switched depending on whether the upper edge 9T of the bent portion of the boom 9 is raised above the height of the work light 21. However, the position of the boom 9 that is the reference for the switching is not limited to the upper edge 9T of the bent portion, and may be set, for example, to the front edge of the boom 9 or to the mounting position of the loader light 22 at the lower edge 9U of the boom. The height position at which the switching is performed is not limited to the height of the work light 21, and may be set to a position below the height of the work light 21 (for example, the height position of the top surface of the bonnet 5) or may be set to a position above the height of the work light 21 (for example, the top of the movable range of the boom 9). Alternatively, a setting operation unit consisting of an operation switch, an operation dial, or the like may be provided on the steering post 19, the armrest 15, the multifunction operation lever 17, the loader operation lever 18, or the like, and the height position (threshold value) at which the switching is performed may be manually changed by operating the setting operation unit. With this configuration, the driver can arbitrarily adjust the timing at which the work light 21 is switched between limiting illumination and releasing the limit in accordance with the lighting direction and arrangement of the work light 21, the shape of the front loader 4, etc.

[0097] In the above embodiment, the lighting restriction and the lifting of the restriction on the work light 21 are executed according to the height position of the boom 9, but the lighting control unit 51a may be configured to execute a lighting restriction for automatically turning off or dimming the work light (first lighting light) 21 according to an operation to turn on the loader light (second lighting light) 22. Specifically, the lighting control unit 51a may be configured to execute a lighting restriction on the work light 21 according to an ON operation of the loader light switch 45f (an operation to turn on the loader light 22) and to lift the lighting restriction according to an OFF operation of the loader light switch 45f (an operation to turn off the loader light 22).

[0098] In the above embodiment, when the boom 9 is lowered below a predetermined position, the restriction on turning on the work light 21 is released, and both the work light 21 and the loader light 22 are in a turned-on state. However, when the boom 9 is lowered below a predetermined position, the restriction on turning on the work light 21 may be released and the restriction on turning on the loader light 22 may be executed. Specifically, when the loader light 22 is in a turned-on state and the boom 9 is lowered below a predetermined position, the illumination control unit 51a releases the restriction on turning on the work light 21 (turns on or increases the light) and executes the restriction on turning on the loader light 22 (turns off or decreases the light). That is, the illumination of the loader light 22 is restricted, and the work light 21 illuminates the periphery of the bucket 10. On the other hand, when the boom 9 is raised above the predetermined position, the illumination control unit 51a executes the restriction on turning on the work light 21 (turns off or decreases the light) and releases the restriction on turning on the loader light 22 (turns on or increases the light). That is, illumination of the work light 21 is restricted, and the area around the bucket 10 is illuminated by the loader light 22.

[0099] In the above embodiment, the actual extension amount of the boom cylinder 11 is calculated based on the position detection signal output from the boom position sensor 50e, and the height position of the boom 9 is linearly determined from the actual extension amount. However, the work vehicle 1 may be provided with a boom position detection unit that detects the position of the boom 9, and the lighting control unit 51a may be configured to switch between execution and release of the lighting restriction in accordance with position detection information by the boom position detection unit. Specifically, the pivot 23 or the like may be provided with a rotation angle sensor as a boom position detection unit that detects the position of the boom 9, and the actual angle of the boom 9 may be calculated based on the angle detection signal output from the rotation angle sensor, and the height position of the boom 9 may be linearly determined from the actual angle. Alternatively, the vehicle body 2 or the front loader 4 may be provided with a detection sensor such as an infrared detection sensor, a magnet switch, or a seesaw switch as a boom position detection unit that detects the position of the boom 9, and the actual position of the boom 9 may be detected at a fixed point by the detection sensor. Alternatively, an imaging device may be provided inside the cabin 7, on the roof 7T, etc. as a boom position detection unit that detects the position of the boom 9, and configured to analyze and determine the position of the boom 9 based on an image captured by the imaging device.

[0100] In the above embodiment, the loader light 22 is provided on the lower edge 9U of each of the left and right booms 9 (the left boom 9L and the right boom 9R), but as long as the area around the bucket 10 can be appropriately illuminated, the loader light 22 may be provided on only one of the left and right booms 9R (the left boom 9L or the right boom 9R), or may be provided on one or both of the left and right side surfaces of the boom 9 instead of the lower edge 9U of the boom 9. Alternatively, the loader light 22 may be provided on the upper part of the boom 9 (for example, the upper edge 9T of the bent portion), or may be provided at a plurality of these locations.

[0101] In addition, in the above embodiment, the driver is configured to manually switch the work light 21 on and off using a work light switch (not shown), but the work vehicle 1 may also be equipped with an illuminance sensor that detects the illuminance outside the vehicle body 2, and an automatic driving control unit that automatically turns the work light 21 on and off based on the detection of the illuminance sensor, and the automatic driving control unit may be configured to automatically turn on the work light 21 if the illuminance outside the vehicle body 2 falls below a reference value, and to automatically turn off the work light 21 if the illuminance outside the vehicle body 2 exceeds the reference value.

[0102] <Effects> Thus, the work vehicle 1 of the above embodiment comprises a drivable body 2, a boom 9 mounted on the body 2 so as to be able to swing up and down, a bucket (work tool) 10 attached to the front of the boom 9, a work light (first lighting lamp) 21 mounted on the body 2 and illuminating the front of the body 2, a loader light (second lighting lamp) 22 mounted on the boom 9 and illuminating the area around the bucket 10, and a lighting control unit 51a that controls the lighting operation of the work light 21 and the loader light 22, and the lighting control unit 51a is capable of executing a lighting restriction that automatically turns off or dims the work light 21 when the loader light 22 is turned on.

[0103] According to this configuration, when the loader light 22 is used, the work light 21 can be automatically turned off or dimmed, preventing the light of the work light 21 from reflecting off the boom 9 or the connecting frame 9J and obstructing visibility. This makes it possible to properly view the work area in front of the vehicle body 2 and the conditions around the bucket 10, even when working with a front loader 4 or the like having a boom 9 attached to the vehicle body 2.

[0104] Furthermore, the lighting control unit 51a executes the above-mentioned lighting restriction when the boom 9 is raised to a predetermined position or higher.

[0105] According to this configuration, if the boom 9 is raised to a predetermined position or higher while the loader light 22 is on, the work light 21 is automatically turned off or dimmed, so that the light of the work light 21 can be prevented from reflecting off the boom 9 or the connecting frame 9J at an appropriate timing. This further improves visibility around the work area and the bucket 10 when the lighting is in use.

[0106] Furthermore, the lighting control unit 51a releases the lighting restriction when the boom 9 is lowered below a predetermined position.

[0107] According to this configuration, if the boom 9 is lowered below a predetermined position while the loader light 22 is on, the restriction on turning on the work light 21 is lifted, making it possible to illuminate the front of the vehicle body 2 (around the bucket 10) with the loader light 22 and the work light 21. This further improves visibility of the work area and around the bucket 10 when the lighting is in use.

[0108] Moreover, the predetermined position is set at a position where the height of at least a part of the boom 9 is the same as the height of the work light 21.

[0109] According to this configuration, when the loader light 22 is turned on, if at least a portion of the boom 9 is raised to the height of the work light 21, the work light 21 is automatically turned off or dimmed, so that the light of the work light 21 can be prevented from reflecting off the boom 9 or the connecting frame 9J at an appropriate timing. This further improves visibility around the work site and the bucket 10 when the lighting is in use.

[0110] In addition, a loader light switch (second lighting switch) 45f is provided for manually turning on and off the loader light 22, and the lighting control unit 51a can be configured to execute the above-mentioned lighting restriction in response to the lighting operation of the loader light switch 45f.

[0111] According to this configuration, the work light 21 is automatically turned off or dimmed in response to the loader light 22 being turned on by the loader light switch 45f, so that the light of the work light 21 is more reliably prevented from being reflected on the boom 9 or the connecting frame 9J. This makes it possible to properly view the conditions around the work site and the bucket 10 when the lighting is in use.

[0112] Also, a boom position sensor (boom position detection unit) 50e that detects the position of the boom 9 is provided, and the lighting control unit 51a switches between execution and release of the lighting restriction in accordance with position detection information by the boom position sensor 50e.

[0113] According to this configuration, switching between limiting and releasing the illumination of the work light 21 is performed in response to position detection information of the boom 9, so that the light of the work light 21 can be prevented from reflecting off the boom 9 or the connecting frame 9J at an appropriate timing. This further improves visibility around the work area and the bucket 10 when the lighting is in use.

[0114] In addition, a loader operation lever (second operation device) 18 for manually operating the boom 9 is provided, and the loader light switch 45f is provided on the loader operation lever 18.

[0115] According to this configuration, the loader light 22 can be manually turned on and off while holding the loader operation lever 18, so the loader light 22 can be quickly turned on and off depending on the situation. This makes it possible to more appropriately view the conditions around the work site and the bucket 10 when using the light. Also, usability is improved significantly.

[0116] Further, the loader light 22 is provided on the lower edge portion 9U of the boom 9.

[0117] According to this configuration, the work area and the area around the bucket 10 can be illuminated from below the boom 9, so that the work area and the area around the bucket 10 can be illuminated more appropriately than when the loader light 22 is provided at another location on the boom 9. This further improves visibility of the work area and the area around the bucket 10 when the lighting is in use.

[0118] The loader light 22 is provided so that the lighting direction can be adjusted to the front or rear of the bucket 10 .

[0119] According to this configuration, the driver can arbitrarily adjust the lighting direction of the loader light 22 in accordance with the arrangement of the loader light 22 relative to the bucket 10 and the shape of the front loader 4, etc., making it possible to more appropriately view the conditions of the work area and the area around the bucket 10 when the lighting is in use.

[0120] Also, a bracket 31 is provided which is connected to the boom 9 and supports the loader light 22, and a gap S2 is defined between the opposing surfaces of the boom 9 and the bracket 31, through which cables arranged along the boom 9 can be inserted.

[0121] According to this configuration, cables such as the hydraulic hose 25 and the power cable 26 can be routed along the gap S2 defined between the boom 9 and the bracket 31, so that it is possible to prevent the cables from rubbing against or getting caught on the loader light 22 when the boom 9 is operated, causing the mounting orientation (lighting direction) of the loader light 22 to shift. This makes it possible to properly view the conditions of the work site and the area around the bucket 10 when the lighting is in use. It is also possible to prevent malfunctions of the cables caused by the above-mentioned rubbing or getting caught.

[0122] In addition, the bracket 31 is provided with a front plate 31F and a rear plate 31B (flanges) on the front and rear edges (outer edges) of the upper plate (facing surface) 31T that faces the boom 9 to prevent the cables from contacting the loader light 22.

[0123] According to this configuration, even if the cables arranged along the gap S2 move or bend when the boom 9 is operated, the front plate 31F and the rear plate 31B provided on the front and rear outer edges of the upper plate 31T of the bracket 31 prevent the cables from contacting the loader light 22, so that the mounting direction of the loader light 22 can be more reliably prevented from shifting. This makes it possible to more appropriately view the conditions of the work site and the surroundings of the bucket 10 when the lighting is in use. Also, malfunctions of the cables caused by contact with the loader light 22 can be more reliably prevented. The front plate 31F and the rear plate 31B also function as guides (hose guides) that support the hydraulic hose 25 curved in the gap S2 from below.

[0124] Further, the front plate 31F and the rear plate 31B extend obliquely toward the outside of the front edge and the rear edge (outer edge) of the upper plate 31T in a direction that widens the gap S2.

[0125] According to this configuration, even if the cables arranged along the gap S2 move or bend significantly outside the front and rear edges of the upper plate 31T, they are unlikely to come into contact with the end faces in the extending direction of the front plate 31F and the rear plate 31B of the bracket 31. This makes it possible to more reliably prevent malfunctions of the cables caused by contact with the front plate 31F and the rear plate 31B.

[0126] It also has a cabin 7 mounted on the vehicle body 2, and the boom 9 includes a left boom 9L arranged on the left side of the vehicle body 2 and a right boom 9R arranged on the right side of the vehicle body 2, with work lights 21 provided respectively on the left front and right front parts of the roof 7T of the cabin 7, and loader lights 22 provided respectively on the left boom 9L and the right boom 9R.

[0127] With this configuration, the work area and the area around the bucket 10 can be illuminated from both the left and right sides of the roof 7T and the left and right sides of the boom 9, so that the work area and the area around the bucket 10 can be illuminated more appropriately than with a work light 21 provided at a predetermined location on the roof 7T or a loader light 22 provided at a predetermined location on the boom 9. This further improves visibility of the work area and the area around the bucket 10 when the lighting is in use.

[0128] In addition, the loader operating lever (second operating device) 18 in the above embodiment is an operating device provided in the driver's seat section 7S of the work vehicle 1 and for operating the front loader 4 mounted on the body 2 of the work vehicle 1, and comprises a lever shaft 44 extending to the driver's seat section 7S, a grip (grip) 43 provided on the upper extension (tip) 44A of the lever shaft 44, and a plurality of operating switches 45 provided on the grip 43 for causing the work vehicle 1 to perform various operations, and the operating switch 45 includes a shuttle changeover switch 45a for switching between forward and reverse of the work vehicle 1, and a shuttle check switch 45e for checking and releasing the check on the switching operation by the shuttle changeover switch 45a.

[0129] According to this configuration, even when working using the front loader 4, the shuttle changeover switch 45a and the shuttle check switch 45e can be operated while holding the grip 43 of the loader operation lever 18. In other words, the work vehicle 1 can be easily and appropriately switched between forward and reverse while operating the front loader 4 with the loader operation lever 18. This significantly improves the operability of the work vehicle 1 when using the front loader 4.

[0130] In addition, the shuttle changeover switch 45a is provided in a position where it can be operated with the thumb of the hand holding the grip 43, and the shuttle check switch 45e is provided in a position where it can be operated with fingers other than the thumb of the hand holding the grip 43.

[0131] According to this configuration, the work vehicle 1 can be switched between forward and reverse by pressing the shuttle check switch 45e with a finger other than the thumb (for example, the middle finger) while pressing the shuttle changeover switch 45a with the thumb, thereby further improving the operability of the work vehicle 1 when the front loader 4 is in use.

[0132] In addition, the grip 43 of the loader operating lever 18 is provided with a recess 47 that recesses inward from the surface portion (grip outer peripheral surface 43A), and the shuttle changeover switch 45a is provided in the recess 47 so that the operating surface portion 48 does not protrude outside the surface of the grip 43.

[0133] With this configuration, the fingers or palm of the hand gripping the grip 43 are less likely to accidentally come into contact with the shuttle changeover switch 45a, preventing the shuttle changeover switch 45a from being unintentionally pressed and switching between forward and reverse travel of the work vehicle 1. It is also possible to prevent the shuttle changeover switch 45a from impairing the operational feel when operating the loader operation lever 18. This further improves the operability of the work vehicle 1 when the front loader 4 is in use.

[0134] The operation switch 45 also includes a third function switch (work implement operation switch) 45b to which an operation function of the bucket (work implement) 10 of the front loader 4 can be assigned, and the shuttle changeover switch 45a is disposed adjacent to the third function switch 45b.

[0135] According to this configuration, because the shuttle changeover switch 45a and the third function switch 45b are disposed adjacent to each other, the work vehicle 1 can be smoothly switched between forward and reverse while operating the bucket 10. This further improves the operability of the work vehicle 1 when using the front loader 4. Moreover, because the shuttle changeover switch 45a and the third function switch 45b are used more frequently than the other operating switches 45, usability is also significantly improved.

[0136] Moreover, the third function switch 45b is a switch to which an operating function of a work tool attached instead of or in addition to the bucket 10 of the front loader 4 can be assigned.

[0137] According to this configuration, by allocating an operating function for another implement to the third function switch 45b, it becomes possible to operate various types of front loaders 4 using the loader operating lever 18, thereby improving versatility.

[0138] In addition, the grip 43 has a grip base end (base end) 43V which is approximately vertically elongated and columnar extending upward from the upper extension (tip end) 44A of the lever shaft 44, and a grip lateral extension (lateral extension) 43W which is approximately horizontally elongated and columnar extending from the upper end of the grip base end 43V toward the seat 14 of the driver's seat section 7S, and the shuttle changeover switch 45a and the shuttle check switch 45e are provided on the grip outer peripheral surface (outer peripheral surface portion of the grip lateral extension 43W) 43A.

[0139] According to this configuration, by gripping the grip horizontal extension portion 43W sideways so as to cover the grip outer peripheral surface 43A with the palm of the hand, the fingertip of the thumb of the hand naturally grips the grip. Outer surface 43A The thumb is positioned near the shuttle changeover switch 45a provided on the grip outer circumferential surface 43A, and fingers other than the thumb (for example, the middle finger) are naturally positioned near the shuttle check switch 45e provided on the grip outer circumferential surface 43A. As a result, it becomes possible to more easily switch between forward and reverse travel of the work vehicle 1. This further improves the operability of the work vehicle 1 when the front loader 4 is in use.

[0140] In addition, the grip tip surface (the tip surface portion of the grip horizontal extension portion 43W on the seat 14 side) 43T is inclined downward from the front edge side, which is the tip side of the hand holding the grip horizontal extension portion 43W, to the opposite rear edge side so as to face the seat 14, and at least one of the operating switches 45 other than the shuttle changeover switch 45a and the shuttle check switch 45e is provided on the grip tip surface 43T.

[0141] According to this configuration, by gripping the grip horizontal extension portion 43W sideways so as to cover the grip outer peripheral surface 43A with the palm of the hand, the operation switch 45 provided on the grip tip surface 43T can be operated more naturally and easily with the fingertip of the thumb of the hand. Also, the driver can easily see the operation switch 45 provided on the grip tip surface 43T. This further improves the operability of the work vehicle 1 when using the front loader 4.

[0142] Further, the grip horizontal extension portion 43W is inclined upward as it extends from the upper extension portion (tip portion) 44A of the lever shaft 44 toward the seat 14 of the driver's seat portion 7S.

[0143] According to this configuration, when the grip horizontal extension 43W is gripped sideways with the palm covering the grip outer peripheral surface 43A, the grip 43 can be gripped in a natural posture with the wrist twisted slightly outward (toward the opposite side to the seat 14), thereby reducing fatigue when operating the loader operating lever 18. This further improves the operability of the work vehicle 1 when the front loader 4 is in use.

[0144] In addition, a raised portion 43E capable of engaging and holding the thumb of the hand holding the grip horizontal extension portion 43W is provided at a position closer to the grip tip surface (tip) 43T than the midpoint in the extension direction of the grip horizontal extension portion 43W on the grip outer peripheral surface (outer peripheral surface portion) 43A.

[0145] According to this configuration, when the grip horizontal extension portion 43W is gripped sideways with the palm covering the grip outer peripheral surface 43A, the thumb of the hand can be engaged and held on the raised portion 43E, further reducing fatigue when operating the loader operating lever 18. This further improves the operability of the work vehicle 1 when the front loader 4 is in use.

[0146] The operation switch 45 also includes a gear change switch 45d for changing the gear ratio of the work vehicle 1, and the gear change switch 45d is provided on the grip tip surface (the tip surface portion on the seat 14 side of the grip horizontal extension portion 43W) 43T.

[0147] According to this configuration, the speed change switch 45d can be operated while holding the grip 43 of the loader operation lever 18. That is, the gear shift of the work vehicle 1 can be changed while operating the front loader 4 with the loader operation lever 18. This further improves the operability of the work vehicle 1 when the front loader 4 is in use.

[0148] The operation switch 45 also includes a loader light switch 45f for switching on and off the loader light (illumination lamp) 22 provided on the front loader 4, and the loader light switch 45f is provided on the grip tip surface (the tip surface portion on the seat 14 side of the grip horizontal extension portion 43W) 43T.

[0149] According to this configuration, the loader light switch 45f can be operated while holding the grip 43 of the loader operation lever 18. That is, the loader light 22 can be switched on and off while operating the front loader 4 with the loader operation lever 18. This further improves the operability of the work vehicle 1 when the front loader 4 is in use.

[0150] In addition, the work vehicle 1 in the above embodiment is equipped with a drivable body 2, a front loader 4 attached to the body 2, a multifunction operation lever (first operation device) 17 having an operation switch 42 for operating the body 2, and a loader operation lever (second operation device) 18 having an operation switch 45 for operating the front loader 4, and the operation switch 42 of the multifunction operation lever 17 includes a shuttle changeover switch (first shuttle changeover switch) 42a for switching between forward and reverse of the work vehicle 1, and a shuttle check switch (first shuttle check switch) 42e for checking and releasing the check on the switching operation by the shuttle changeover switch 42a, and the operation switch 45 of the loader operation lever includes a shuttle changeover switch (second shuttle changeover switch) 45a for switching between forward and reverse of the work vehicle 1, and a shuttle check switch (second shuttle check switch) 45e for checking and releasing the check on the switching operation by the shuttle changeover switch 45a.

[0151] According to this configuration, the work vehicle 1 can be switched between forward and reverse by the multifunction operation lever 17, and can also be switched between forward and reverse by the loader operation lever 18. That is, the work vehicle 1 can be switched between forward and reverse by either the multifunction operation lever 17 or the loader operation lever 18. Moreover, when using the loader operation lever 18, the work vehicle 1 can be switched between forward and reverse while operating the front loader 4. This significantly improves the operability of the work vehicle 1 when working using the front loader 4.

[0152] In addition, in the above-mentioned work vehicle 1, the multifunction operation lever 17 and the loader operation lever 18 are arranged on one side of the seat 14 provided on the vehicle body 2 and in a position where the driver sitting in the seat 14 can grasp and operate the grips 41, 43 with the hand on that side, the shuttle changeover switches (first shuttle changeover switch and second shuttle changeover switch) 42a, 45a are provided in a position where they can be operated with the thumb of the hand holding the grips 41, 43, and the shuttle check switch (first shuttle check switch and second shuttle check switch) 42e, 45e are provided in a position where they can be operated with fingers other than the thumb of the hand holding the grips 41, 43.

[0153] According to this configuration, when the multifunction operation lever 17 is used, the forward and reverse motion of the work vehicle 1 can be switched by pressing the shuttle check switch 42e with a finger (e.g., index finger) other than the thumb of the hand gripping the grip 41 and pressing the shuttle changeover switch 42a with the thumb. On the other hand, when the loader operation lever 18 is used, the forward and reverse motion of the work vehicle 1 can be switched by pressing the shuttle check switch 45e with a finger (e.g., index finger) other than the thumb of the hand gripping the grip 43 and pressing the shuttle changeover switch 45a with the thumb. In other words, whether the multifunction operation lever 17 or the loader operation lever 18 is used, the forward and reverse motion of the work vehicle 1 can be switched by the same finger operation. This further improves the operability of the work vehicle 1 when the front loader 4 is used.

[0154] Although the present invention has been described above, the embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the scope and meaning equivalent to the claims. [Explanation of symbols]

[0155] 1 Work vehicle 2. Body 4 Front Loader 7S Driver's seat 10 Bucket (work tool) 14 seats 17 Multi-function operation lever (first operation device) 18 Loader operation lever (operation device, second operation device) 22 Roadlight (lighting) 41 Grip (holding part) 42 Operation switch 42a Shuttle selector switch (first shuttle selector switch) 42e Shuttle Check Switch (1st Shuttle Check Switch) 43 Grip (holding part) 43A Grip outer surface (outer surface part) 43E Elevation 43T Grip tip surface (tip surface) 43V Grip base end (base end) 43W Grip horizontal extension (horizontal extension) 44 Lever shaft 44A Upper extension (tip) 45 Operation switch 45a Shuttle switch (second shuttle switch) 45b 3rd function switch (tool operation switch) 45c 4th function switch (tool operation switch) 45d gear shift switch 45e Shuttle Check Switch (Second Shuttle Check Switch) 45f Loader Light Switch 47 recess 48 Operation face

Claims

1. An operating device provided in a driver's seat of a work vehicle for operating a front loader mounted on a body of the work vehicle, a lever shaft that is pivotally provided to the side of the driver's seat and that moves the front loader up and down by a pivoting operation; A grip portion provided at a tip end of the lever shaft; a plurality of operation switches provided on the grip portion for causing the work vehicle to perform various operations; The grip portion has a substantially horizontally elongated columnar horizontal extension portion extending toward the seat side at an upper portion of the grip portion, The operation switch is A shuttle changeover switch provided on the lateral extension portion for switching between forward and reverse of the work vehicle; An operating device including a shuttle check switch provided on the lateral extension portion for checking and releasing the switching operation by the shuttle changeover switch.

2. the shuttle changeover switch is provided at a position operable by the thumb of a hand holding the grip portion, The operating device according to claim 1 , wherein the shuttle check switch is provided at a position operable by fingers other than the thumb of a hand holding the grip portion.

3. The transverse extension portion is provided with a recess that is recessed inward from the surface portion, The operating device according to claim 1 or 2, wherein the shuttle changeover switch is provided in the recess so that an operating surface portion does not protrude outside a surface of the horizontal extending portion.

4. The operation switch includes a work tool operation switch to which an operation function of a work tool of the front loader can be assigned, The operating device according to any one of claims 1 to 3, wherein the shuttle changeover switch is disposed adjacent to the tool operation switch.

5. The implement operation switch is attached instead of or in addition to the bucket of the front loader.

5. The operating device according to claim 4, which is a switch to which an operating function of a work tool to be operated can be assigned.

6. The grip portion has a base end portion having a generally vertically elongated columnar shape extending upward from a tip end portion of the lever shaft, and the horizontal extension portion, The lateral extension portion extends from an upper end of the base end portion toward the seat side, The operating device according to any one of claims 1 to 5, wherein the shuttle changeover switch and the shuttle check switch are provided on an outer peripheral surface of the horizontal extension portion.

7. The seat-side tip surface portion of the horizontal extension portion is inclined from a front edge side, which is the tip side of the hand that grasps the horizontal extension portion, to a rear edge side on the opposite side so as to face the seat side, The operating device according to claim 6 , wherein at least one of the operating switches other than the shuttle changeover switch and the shuttle check switch is provided on the tip surface portion.

8. The operating device according to claim 6 or 7, wherein the lateral extension portion is inclined upward as it extends from the tip side of the lever shaft toward the seat side.

9. The operating device according to any one of claims 6 to 8, wherein a raised portion capable of holding the thumb of a hand holding the horizontal extension portion is provided at a position closer to the tip than the middle position of the extension direction of the horizontal extension portion on the outer peripheral surface portion.

10. The operation switch includes a gear shift switch for changing a gear position of the work vehicle, The operating device according to any one of claims 6 to 9, wherein the speed change switch is provided on a tip surface portion of the horizontal extension portion on the seat side.

11. the operation switch includes a loader light switch for switching on and off an illumination light provided on the front loader, The operating device according to any one of claims 6 to 10, wherein the loader light switch is provided on a tip surface portion of the horizontal extension portion on the seat side.

12. A vehicle that can be driven; The driver's seat and A front loader attached to the vehicle body; A first operating device which is an operating lever provided in the driver's seat portion so as to be capable of swinging and which operates the vehicle body; a second operating device that is an operating lever for operating the front loader, the second operating device being provided in a swingable manner in the driver's seat portion and adjacent to the first operating device, the first operating device and the second operating device each have a plurality of operating switches for causing the work vehicle to execute various operations, the operation switch of the first operation device includes a first shuttle changeover switch for switching between forward and reverse of the work vehicle, and a first shuttle check switch for checking and releasing the check on the switching operation by the first shuttle changeover switch, A work vehicle, wherein the operation switch of the second operating device includes a second shuttle changeover switch for switching between forward and reverse of the work vehicle, and a second shuttle check switch for checking and releasing the check on the switching operation by the second shuttle changeover switch.

13. The first operating device and the second operating device are disposed on one side of a seat provided in the vehicle body and at a position where a driver sitting on the seat can grasp and operate a grip portion with a hand on the one side, the first shuttle changeover switch and the second shuttle changeover switch are provided at positions operable by the thumb of a hand holding the grip portion, The work vehicle according to claim 12 , wherein the first shuttle check switch and the second shuttle check switch are provided at positions operable with fingers other than the thumb of a hand holding the grip portion.

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