Industrial vehicle

Abstract

To provide an industrial vehicle that is able to reduce a burden on a foot of an operator during driving.SOLUTION: An industrial vehicle has a rotation transmission mechanism including: a plurality of sprockets installed on a floor 19 of a driver's seat; a movable sprocket 28 included in the plurality of sprockets and capable of changing a position with respect to the floor; a plurality of chains wound around the plurality of sprockets; an adjustment member supporting the movable sprocket 28 and capable of adjusting the position of the movable sprocket 28; and a fixing member fixing the adjustment member to the floor 19. In the industrial vehicle, a cover member 26 has: a side plate rising from the floor 19; and an upper plate connected to an upper edge of the side plate. The fixing member is located below the movable sprocket 28 so as to overlap the movable sprocket 28 in a plan view. The side plate has an extension portion extending along an outer peripheral edge of the movable sprocket and the fixing member.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] This invention relates to an industrial vehicle.

Background Art

[0002] As an industrial vehicle, a tractor that can tow a trolley has been conventionally known. For example, in the tractor 100 shown in FIG. 10, a driver's seat 102 is provided on a vehicle body 101, and a driver's seat 103 is provided on the vehicle body 101. The vehicle body 101 is provided with a steering device 104 for steering a front wheel (not shown). A steering wheel 105 for steering the front wheel is provided in front of the driver's seat 102. As shown in FIG. 11, the steering device 104 includes a steering shaft 106 connected to the steering wheel 105, a rotation transmission mechanism 107 that transmits the rotation of the steering shaft 106 to the front wheel, and a cover member 109 that is installed on the floor 108 of the driver's seat 102 and covers the rotation transmission mechanism 107.

[0003] The steering shaft 106 extends toward the front of the floor 108 of the driver's seat 102. The rotation transmission mechanism 107 is provided on the floor of the driver's seat 102. The rotation transmission mechanism 107 includes a steering sprocket 110 provided on the steering shaft 106, a movable sprocket 111 provided on the floor 108, and a steering wheel side sprocket 113 provided on a support shaft 112 that supports the front wheel. A first sprocket chain 114 is mounted on the steering sprocket 110 and the movable sprocket 111. A second sprocket chain 115 is mounted on the movable sprocket 111 and the steering wheel side sprocket 113. Therefore, the rotation of the steering shaft 106 is transmitted to the front wheel support shaft 112 via the rotation transmission mechanism 107. The rotation transmission mechanism 107 is covered by the cover member 109. The cover member 109 covers the rotation transmission mechanism 107 and also covers brake system wiring provided near the rotation transmission mechanism 107. The cover member 109 occupies a corresponding portion at the front of the floor 108.

[0004] On the one hand, as a prior art related to industrial vehicles, for example, a traveling vehicle disclosed in Patent Document 1 is known. In the traveling vehicle of Patent Document 1, most of the steering mechanism is housed in the front cowl. And it is stated that a wide space is provided for the feet of the person sitting in the front seat.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, in the prior art shown in FIGS. 10 and 11, since the cover member occupies a considerable portion at the front of the floor, the space for the operator to place their feet on the floor is restricted. Also, although it is possible to place the feet on the cover member with the heels on the floor, the configuration of the cover member has a problem that the burden on the feet becomes large. On the other hand, the traveling vehicle disclosed in Patent Document 1 is only a technology for widening the space for the feet depending on the shape of the front cowl.

[0007] The present invention has been made in view of the above problems, and an object of the present invention is to provide an industrial vehicle capable of reducing the burden on the operator's feet during operation.

Means for Solving the Problems

[0008] In order to solve the above problems, the present invention has a vehicle body provided with a steering wheel, a steering device for steering the steering wheel, and a driver's seat provided on the vehicle body. The steering device includes a steering shaft provided on the driver's seat and connected to a steering wheel, a rotation transmission mechanism connected to the steering shaft for transmitting the rotation of the steering shaft to the steering wheel, and a cover member installed on the floor of the driver's seat for covering the rotation transmission mechanism. The rotation transmission mechanism includes a plurality of sprockets installed on the floor, a movable sprocket included in the plurality of sprockets and capable of changing its position relative to the floor, a chain suspended from the plurality of sprockets, an adjustment member for supporting the movable sprocket and making it possible to adjust the position of the movable sprocket, and a fixing member for fixing the adjustment member to the floor. In the industrial vehicle, the cover member has a side plate rising from the floor and an upper plate connected to the upper edge of the side plate. The fixing member is located below the movable sprocket so as to overlap the movable sprocket in plan view, and the side plate has an extending portion extending along the outer peripheral edge of the movable sprocket and the fixing member.

[0009] In the present invention, the fixing member for fixing the adjustment member to the floor is located below the movable sprocket, and the extending portion of the side plate extends along the outer peripheral edge of the movable sprocket and the fixing member. Therefore, it is possible to bring the extending portion of the cover member close to the outer peripheral edge of the movable sprocket, creating a space on the front part of the floor that is not occupied by the cover member. The space on the front part of the floor that is not occupied by the cover member becomes a space where the operator can place their feet. By being able to place the feet in this space, it is possible to reduce the burden on the operator's feet during operation.

[0010] Also, in the above industrial vehicle, the upper plate may be configured to have an inclined portion that rises from the rear to the front. In this case, since the upper plate has an inclined portion that rises from the rear to the front, the entire foot can be placed on the inclined portion. And even when the foot is placed on the upper plate, the sole of the foot is supported by the surface of the inclined portion, so the burden on the foot during driving can be reduced.

[0011] Also, in the above industrial vehicle, the upper plate may have a stepped portion with a height difference in the front-rear direction so as to follow the upper part of the rotation transmission mechanism, and the rear of the stepped portion may be lower than the front of the stepped portion. In this case, the upper plate has a stepped portion with a height difference in the front-rear direction so as to follow the upper part of the rotation transmission mechanism, and the rear of the stepped portion on the upper plate is lower than the front of the stepped portion. Therefore, even when the operator's foot is placed on the upper plate, there is a height difference between the front and rear of the stepped portion, and the burden on the foot is reduced.

[0012] Also, in the above industrial vehicle, the rotation transmission mechanism includes a fixed sprocket that is included in the plurality of sprockets and is fixed in position with respect to the floor, a steering shaft, and a steering sprocket attached to the steering shaft, and the axis of the fixed sprocket and the axis of the steering sprocket may be positioned front and rear. In this case, since the center of the fixed sprocket and the center of the steering sprocket are positioned front and rear, the position of the movable sprocket can be made more appropriate, which in turn contributes to an increase in the space not occupied by the cover member.

Advantages of the Invention

[0013] According to the present invention, it is possible to provide an industrial vehicle capable of reducing the burden on the operator's foot during driving.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Mode for Carrying Out the Invention

[0015] (First Embodiment) Hereinafter, a small tractor (small tractor) as an industrial vehicle according to the first embodiment will be described with reference to the drawings. In the present embodiment, with respect to "front-rear", "left-right", and "up-down" for specifying directions, it is based on the state where an operator is seated in the driver's seat of the tractor and facing forward.

[0016] As shown in FIG. 1, a steering wheel 12 as a front wheel is provided at the front of the vehicle body 11 of the tractor 10, and a drive wheel 13 as a rear wheel is provided at the rear of the vehicle body 11. A driver's seat 14 is provided near the center of the vehicle body 11. As shown in FIGS. 1 and 2, the driver's seat 14 is provided with a driver's seat 15 for an operator to sit on. A front cover 16 is provided at the front of the driver's seat 14. A steering wheel 17 is provided at the rear of the front cover 16, and the steering wheel 17 is connected to a steering shaft 18 that supports the steering wheel 17.

[0017] The steering shaft 18 extends toward the front part of the floor 19 of the driver's seat 14. The steering shaft 18 has an upper shaft part 18A that tilts backward and a lower shaft part 18B that is connected to the lower end of the upper shaft part 18A via a universal joint part 18C. The upper shaft part 18A is pivotally supported above the front cover 16, and the lower shaft part 18B extends in a substantially right-angled direction and is rotatably supported on the floor 19 via a bearing 20. In this embodiment, with respect to the floor 19, the axis of the steering shaft 18 is located at the center in the width direction of the vehicle body 11. The operator operates the steering wheel 17 to steer the steered wheels 12. The floor 19 of the driver's seat 14 is formed of a plate member and it is possible to place the operator's feet thereon.

[0018] A battery room (not shown) is located behind the driver's seat 14 in the vehicle body 11. The battery room is a space capable of accommodating the battery 21. The upper part of the battery room is covered by an openable and closable cover 11A provided on the vehicle body 11. A drawbar device 22 for connecting a towed vehicle (not shown) such as a trolley is provided at the rear part of the vehicle body 11. By the operator operating the drawbar device 22, the connection or disconnection of the transport trolley, which is the towed vehicle with respect to the towing vehicle 10, is performed.

[0019] A drive motor (not shown) for traveling as a traveling drive source that generates a driving force for driving the drive wheels 13 and a motor driver (not shown) for driving the drive motor for traveling are accommodated at the rear part of the vehicle body 11. In addition to the motor driver, an in-vehicle controller 23 for controlling each part of the vehicle body 11 is mounted on the vehicle body 11.

[0020] Incidentally, the steering wheel 12 is steered by operating the steering wheel 17. As shown in FIGS. 3 and 4, a steering device 24 for steering the steering wheel 12 is provided at the front part of the floor 19 of the driver's seat 14. The steering device 24 includes a steering shaft 18, a rotation transmission mechanism 25 connected to the steering shaft 18 and transmitting the rotation of the steering shaft 18 to the steering wheel 12, and a cover member 26 installed on the floor 19 of the driver's seat 14 and covering the rotation transmission mechanism 25.

[0021] The rotation transmission mechanism 25 includes a steering sprocket 27 attached to the lower shaft portion 18B, a movable sprocket 28 whose position relative to the floor 19 can be changed, and a steering wheel side sprocket 29 serving as a fixed sprocket whose position is fixed relative to the floor 19. As shown in FIG. 4, the movable sprocket 28 has a large-diameter sprocket portion 28A with a large sprocket diameter and a small-diameter sprocket portion 28B with a small sprocket diameter. The large-diameter sprocket portion 28A is attached to a movable shaft 30 so as to be located above the small-diameter sprocket portion 28B. The movable shaft 30 is rotatably supported by an adjustment plate 31 via a bearing 32. The upper end of the movable shaft 30 penetrates the large-diameter sprocket portion 28A and projects upward. The adjustment plate 31 is a plate member slidable relative to the floor 19 and corresponds to an adjustment member for adjusting the position of the movable sprocket 28. Details of the adjustment plate 31 will be described later.

[0022] The steering wheel side sprocket 29 is a sprocket attached to a steering shaft 33 that supports the steering wheel 12, and its position is fixed relative to the floor 19 and does not change. The steering shaft 33 is a shaft that penetrates the floor 19 and is rotatably supported by the vehicle body 11 via a bearing (not shown). The axis of the steering shaft 33 is located at the center in the width direction of the vehicle body 11 and in front of the axis of the lower shaft portion 18B.

[0023] The rotation transmission mechanism 25 has a first steering chain 35 and a second steering chain 36. The first steering chain 35 is an endless chain suspended from the steering sprocket 27 and the large-diameter sprocket portion 28A of the movable sprocket 28. The second steering chain 36 is an endless chain suspended from the small-diameter sprocket portion 28B of the movable sprocket 28 and the steering wheel side sprocket 29. Therefore, the rotation transmission mechanism 25 has a plurality of sprockets installed on the floor 19 of the driver's seat 14 and a plurality of chains suspended from the plurality of sprockets. The rotation of the steering wheel 17 by the operator is transmitted as the rotation of the steering shaft 33 for steering the steering wheel 12 via the rotation transmission mechanism 25.

[0024] By the way, the tensions of the first steering chain 35 and the second steering chain 36 need to be adjusted. The adjustment of the tensions of the first steering chain 35 and the second steering chain 36 can be achieved by adjusting the position of the adjustment plate 31 with respect to the floor 19. The adjustment plate 31 will be described in detail.

[0025] The adjustment plate 31 is formed of a metal plate so as to be substantially rhombic in plan view. As shown in FIG. 3, the outer peripheral edge of the adjustment plate 31 has a first outer peripheral edge 31A facing rightward from the front and a second outer peripheral edge 31B facing leftward from the rear. The first outer peripheral edge 31A is formed to bulge rightward and forward, and the second outer peripheral edge 31B is formed to bulge leftward and rearward. In a state where the adjustment plate 31 is fixed to the floor 19, most of the second outer peripheral edge 31B is hidden below the movable sprocket 28 in plan view.

[0026] The adjustment plate 31 has a plate main body portion 37 and an arm portion 38 extending leftward from the front portion of the plate main body portion 37. As shown in FIG. 4, near the center of the plate main body portion 37 of the adjustment plate 31, a cylindrical mounting portion 39 for rotatably supporting the movable shaft 30 is provided with a bearing 32 mounted thereon. The mounting portion 39 protrudes from the back surface of the adjustment plate 31, and an opening 40 through which the mounting portion 39 can be inserted is formed in the floor 19. The opening 40 is a hole having a diameter larger than the outer diameter of the mounting portion 39. Since the opening 40 has a diameter larger than the outer diameter of the mounting portion 39, the position of the adjustment plate 31 relative to the floor 19 can be changed by sliding.

[0027] As shown in FIG. 3, three through holes 42, 43, and 44 through which bolts 41 for fixing to the floor 19 are inserted are formed in the adjustment plate 31. The bolts 41 correspond to fixing members. The through hole 42 is a front through hole formed near the tip of the arm portion 38. The through hole 43 is a rear through hole formed on the left rear of the plate main body portion 37. The through hole 44 is an intermediate through hole formed near the middle between the through hole 42 and the through hole 43 and near the second outer peripheral edge 31B. The through holes 42 to 44 are holes sufficiently larger than the outer diameter of the shaft portion of the bolt 41. The bolts 41 inserted through the through holes 42 and 43 are exposed in a plan view when the adjustment plate 31 is fixed to the floor 19. On the other hand, when the adjustment plate 31 is fixed to the floor 19, the bolt 41 inserted through the through hole 44 is hidden by the movable sprocket 28 in a plan view. That is, the bolt 41 inserted through the through hole 44 is located below the movable sprocket 28 so as to overlap with the movable sprocket 28. Since the bolt 41 inserted through the through hole 44 is hidden by the movable sprocket 28 in a plan view, the cover member 26 can be provided close to the movable sprocket 28. On the other hand, a plurality of screw holes 45 into which the bolts 41 can be screwed are formed in the floor 19.

[0028] The second outer periphery 31B of the adjustment plate 31 is provided with an adjustment bolt 46. The adjustment bolt 46 is a bolt for changing the position of the adjustment plate 31. The floor 19 is provided with an upright piece 19A standing upright (see FIG. 3). By rotating the adjustment bolt 46 with the tip of the shaft portion of the adjustment bolt 46 in contact with the upright piece 19A, the position of the adjustment plate 31 can be adjusted. By adjusting the position of the adjustment plate 31, the tensions of the first steering chain 35 and the second steering chain 36 are adjusted.

[0029] Next, the cover member 26 will be described. The cover member 26 is a metal cover that covers the rotation transmission mechanism 25. By covering the rotation transmission mechanism 25 with the cover member 26, interference between the operator's foot and the sprockets and the chain is prevented. The cover member 26 of the present embodiment has a first cover body 47 and a second cover body 48. As shown in FIGS. 5 and 6, the first cover body 47 covers the right part of the rotation transmission mechanism 25, and the second cover body 48 covers the left part of the rotation transmission mechanism 25.

[0030] The first cover body 47 has a first side plate 51 rising from the floor 19 and a first upper plate 52 connected to the upper edge of the first side plate 51. The first side plate 51 has a right side plate portion 53 facing rightward, a rear side plate portion 54 facing rearward, and a right connection side plate portion 55. The right side plate portion 53 faces the steering sprocket 27 and the steering wheel side sprocket 29. The lower end of the right side plate portion 53 is bent along the floor 19, and a right attachment portion 56 enabling attachment to the floor 19 is formed. The right attachment portion 56 is fixed to the floor 19 by bolts 60. The rear side plate portion 54 extends in the width direction of the vehicle body 11 and faces the steering wheel side sprocket 29. The right connection side plate portion 55 is a portion connecting the right end of the rear side plate portion 54 and the rear end of the right side plate portion 53, and obliquely extends right forward from the rear side plate portion 54.

[0031] The first upper plate 52 is a flat plate formed in a substantially L shape connected to the right side plate portion 53, the rear side plate portion 54, and the right connection side plate portion 55. As shown in FIG. 5, the left end of the first upper plate 52 has an edge portion 57 extending in the front-rear direction from the front, an edge portion 58 extending leftward from the rear end of the edge portion 57, and an edge portion 59 extending left-rearward from the left end of the edge portion 58. The edge portions 57 and 59 are each provided with a connection piece (not shown) that rises from the first upper plate 52 by bending.

[0032] Next, the second cover body 48 will be described. The second cover body 48 has a second side plate 61 rising from the floor 19 and a second upper plate 62 as an upper plate connected to the upper edge of the second side plate 61. In the present embodiment, as shown in FIG. 6, the second side plate 61 is set higher than the first side plate 51. The second side plate 61 has a left side plate portion 63, a rear side plate portion 64 facing rearward, an extending side plate portion 65, and a left connection side plate portion 66. The left side plate portion 63 faces leftward and faces the movable sprocket 28, the arm portion 38, and the adjustment bolt 46. The lower end of the left side plate portion 63 is bent along the floor 19, and a left attachment portion 67 enabling attachment to the floor 19 is formed. The left attachment portion 67 is fixed to the floor 19 by a bolt 60. The rear side plate portion 64 faces rearward and faces the movable sprocket 28 and the steering wheel side sprocket 29.

[0033] The extending side plate portion 65 is a portion extending along the outer periphery of the movable sprocket 28 from the left end of the rear side plate portion 64 and extends left-forward from the rear side plate portion 64. The extending side plate portion 65 is bent. The extending side plate portion 65 corresponds to an extending portion extending along the outer peripheral edge of the movable sprocket 28 and the bolt 41. The left connection side plate portion 66 is a portion connecting the front end of the extending side plate portion 65 and the rear end of the left side plate portion 63 and extends in the width direction. To the left of the extending side plate portion 65 and behind the left connection side plate portion 66, there exists a foot-puttable area 70 as a part of the floor 19 where the left foot L extended forward from the floor 19 can be placed.

[0034] Incidentally, in the conventional tractor 100 shown in FIGS. 10 and 11, the position of the steering wheel 105 is located to the left of the center in the width direction, so that the driver's seat 103 is installed to the left of the center in the width direction of the vehicle body 101. For this reason, the cover member 109 covering the rotation transmission mechanism 107 is provided in a shape shifted to the left, and there is no space for providing a footrest area on the left side of the cover member 109. Although it is possible to place the left foot on the cover member 109, the cover member 109 has a structure in which it is impossible to avoid the heel of the left foot from contacting the floor 108. In the present embodiment, the axis of the steering sprocket 27 is set as the center in the width direction of the vehicle body 11, and further, by arranging the steering sprocket 27 and the steering wheel side sprocket 29 in the front-rear direction, the movable sprocket 28 can be appropriately arranged, making it easier to secure the footrest area 70.

[0035] Next, the second upper plate 62 as the upper plate will be described. The second upper plate 62 has an upper plate main body portion 68 and an inclined body portion 69 provided on the upper surface of the upper plate main body portion 68 and rising from the rear to the front (see FIG. 6). The inclined body portion 69 functions as an inclined portion. The upper plate main body portion 68 is a flat plate connected to the left side plate portion 63, the rear side plate portion 64 facing rearward, the extending side plate portion 65, and the left connection side plate portion 66. The right end of the upper plate main body portion 68 is provided with a connection plate portion 71 bent downward along the left end of the first cover body 47 (see FIG. 6). The front end 72 of the upper plate main body portion 68 is formed along the inner wall of the front cover 16. A notch 73 cut out from the front end 72 toward the rear is formed on the front right of the upper plate main body portion 68. The lower shaft portion 18B is inserted into the notch 73. Another notch 74 is formed on the front right of the upper plate main body portion 68. The notch 74 allows the harness of the parking brake (not shown) to be inserted.

[0036] A circular opening 75 is formed at a position corresponding to the position of the movable shaft 30 of the movable sprocket 28 in the upper plate body portion 68. The inclined body portion 69 is provided on the upper surface of the upper plate body portion 68 so as to conceal the opening 75. The inclined body portion 69 has an inclined plate 76 that rises from the rear to the front, and the inclined plate 76 can support the operator's foot. The inclined plate 76 is set at an inclined angle (about 10°) that can reduce the burden on the operator's foot. A front plate 77 is formed at the front end of the inclined plate 76, and the rear end of the inclined plate 76 is fixed to the rear end of the upper plate body portion 68. Inclined body side plates 78 are formed on both sides of the inclined plate 76. The inclined angle of the inclined plate 76 is preferably an angle at which it is difficult for the burden to be applied to the ankle of the operator's left foot. Specifically, for example, an inclined angle of 5 to 25° is preferable.

[0037] Thus, the upper surface of the cover member 26 is formed by the first upper plate 52, the second upper plate 62, and the inclined body portion 69. The first side plate 51 and the second side plate 61 correspond to the side plates rising from the floor 19. The height of the first upper plate 52 with respect to the floor 19 is lower than that of the second upper plate 62. Also, the inclined body portion 69 is higher than the second upper plate 62. Note that an accelerator pedal 79 and a brake pedal 80 are disposed to the right of the cover member 26.

[0038] Next, the driving state of the operator in the tractor 10 according to the present embodiment will be described. When the operator drives the tractor 10, the operator sits on the driver's seat 15 and holds the steering wheel 17 with both hands. The operator's right foot operates the accelerator pedal 79 and the brake pedal 80. As shown in FIGS. 7(a) and 7(b), the operator's left foot L is placed on the floor 19 or on the inclined plate 76 of the cover member 26. The tractor 10 travels on the road surface F when the accelerator pedal 79 is depressed by the operator's right foot (not shown).

[0039] In this embodiment, the foot-placement possible area 70 is located in front of the rear side plates 54 and 64 of the cover member 26 in the front-rear direction as a part of the floor 19. More specifically, a part of the foot-placement possible area 70 exists to the left of the extending side plate portion 65 and behind the left connecting side plate portion 66. As shown in FIG. 7(a), by increasing the space for placing the left foot of the operator as a part of the floor 19 in the foot-placement possible area 70, the left foot L can be extended further forward, and the load on the left foot L is reduced. Further, as shown in FIG. 7(b), when the left foot L is placed on the inclined plate 76, the inclination angle of the inclined plate 76 and the height of the second side plate 61 cooperate to place the heel of the left foot L on the inclined plate 76 without placing it on the floor 19, and the load on the left foot L is reduced. However, it is possible to place the left foot L on the inclined plate 76 with the heel of the left foot L touching the floor 19.

[0040] The tractor 10 of this embodiment has the following effects. (1) The bolts 41 for fixing the adjustment plate 31 to the floor 19 are located below the movable sprocket 28, and the extending side plate portion 65 of the second side plate 61 extends along the outer peripheral edge of the movable sprocket 28 and the bolts 41. Therefore, it becomes possible to bring the extending side plate portion 65 of the cover member 26 close to the outer peripheral edge of the movable sprocket 28, and a space that the cover member 26 does not occupy is generated at the front portion of the floor 19. The space that the cover member 26 does not occupy at the front portion of the floor 19 becomes a space where the operator's foot can be placed. By being able to place the foot in this space, it is possible to reduce the burden on the left foot of the operator during driving.

[0041] (2) Since the second upper plate 62 has the inclined plate 76 that rises from the rear to the front, the left foot of the operator can be entirely placed on the inclined plate 76. And even when the operator's foot is placed on the second upper plate 62, the sole of the foot is supported by the surface of the inclined plate 76, so it is possible to reduce the burden on the left foot of the operator during driving.

[0042] (3) The rotation transmission mechanism 25 includes a steering wheel side sprocket 29 whose position is fixed relative to the floor 19, a steering shaft 18 connected to the steering wheel 17, and a steering sprocket 27 mounted on the steering shaft 18. The axis of the steering wheel side sprocket 29 and the axis of the steering sprocket 27 are positioned one behind the other. Therefore, the position of the movable sprocket 28 can be set to a more appropriate position, which in turn contributes to an increase in the space not occupied by the cover member 26. Also, since the steering sprocket 27 mounted on the steering shaft 18 is disposed on the front side of the vehicle body 11 with respect to the axis of the steering wheel side sprocket 29, a wider space can be secured at the operator's feet.

[0043] (Second Embodiment) Next, the tractor according to the second embodiment will be described. In this embodiment, the configuration of the cover member is different from that of the first embodiment. For the configurations that are the same as those in the first embodiment in this embodiment, the description of the first embodiment is incorporated by reference and common reference numerals are used.

[0044] As shown in FIG. 8, in the tractor 90, the steering device 24 includes a rotation transmission mechanism 25 and a cover member 91 installed on the floor 19 of the driver's seat 14 and covering the rotation transmission mechanism 25. The cover member 91 includes a first cover body 47 and a second cover body 92. The second cover body 92 covers the left portion of the rotation transmission mechanism 25. The second cover body 92 includes a second side plate 61 and a second upper plate 93 as an upper plate connected to the upper edge of the second side plate 61.

[0045] The second upper plate 93 has an upper plate main body portion 68 and a box body portion 94 provided on the upper surface of the upper plate main body portion 68 and rising from the rear to the front. The box body portion 94 has a box body side plate 95 rising from the upper plate main body portion 68 and a top plate 96 connected to the upper end of the box body side plate 95. The top plate 96 is square in plan view. A stepped portion is formed by the box body side plate 95 on the rear surface of the box body portion 94 and the upper plate main body portion 68. That is, the second upper plate 93 has a stepped portion with a height difference in the front-rear direction so as to follow the upper portions of the movable sprocket 28 and the movable shaft 30 of the rotation transmission mechanism 25, and the rear of the stepped portion in the second upper plate 93 is lower than the rear of the stepped portion in the second upper plate 93.

[0046] In the present embodiment, as shown in FIG. 9(a), the left foot L can be placed in the foot-placement possible area 70, and the same effects as the effects (1) and (3) of the first embodiment are achieved. Further, as shown in FIG. 9(b), by providing the box body portion 94, the height of the upper plate main body portion 68 can be suppressed, and it is also possible to place the left foot L of the operator on the second cover body 92 without touching the floor 19 with the heel. That is, the second upper plate 93 has a stepped portion with a height difference in the front-rear direction, and the rear of the stepped portion in the second upper plate 93 is lower than the rear of the stepped portion in the second upper plate 93. Therefore, even when the left foot L of the operator is placed on the second upper plate 93, there is a height difference between the front and the rear of the stepped portion, and the burden on the left foot L of the operator is reduced.

[0047] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the gist of the invention. For example, the following modifications may be made.

[0048] ○ In the above-described embodiment, the cover member is assumed to have the first cover body and the second cover body, but the present invention is not limited to this. The cover member may be, for example, a single cover member, or may have three or more cover bodies. ○ In the above-described embodiment, the axis of the fixed sprocket and the axis of the steering sprocket are positioned in the front-rear direction, but the present invention is not limited to this. The axis of the fixed sprocket and the steering sprocket may be positioned other than in the front-rear direction. ○ In the above-described embodiment, the upper plate has an inclined portion that rises from the rear to the front or a stepped portion with a height difference in the front-rear direction following the upper part of the rotation transmission mechanism, but it is not limited thereto. The upper plate may be, for example, an upper plate without an inclined portion or a stepped portion. ○ In the above-described embodiment, it is assumed that the operator's foot can be placed on the upper plate without the heel contacting the floor, but it is not limited to this. For example, it does not prevent the heel from contacting the floor and placing the foot on the cover member. 〇 In the above-described embodiment, among the plurality of fixing members for fixing the adjustment member, it is assumed that a specific fixing member overlaps with the movable sprocket in a plan view and is completely hidden, but it is not limited to this. A part of the fixing member may overlap with the movable sprocket. Also, some or all of the other fixing members may similarly overlap with the movable sprocket. ○ In the above-described embodiment, a tractor as an industrial vehicle is exemplified, but it is not limited thereto. As long as the industrial vehicle has a rotation transmission mechanism of a steering device, an adjustment member for adjusting the position of a sprocket included in the rotation transmission mechanism, and a cover for covering the rotation transmission mechanism at the front part of the floor, the type of the industrial vehicle is not particularly limited.

Explanation of Reference Numerals

[0049] 10, 90, 100 Tractor 11, 101 Vehicle body 12 Steering wheel 13 Driving wheel 14, 102 Driver's seat 17, 105 Steering wheel 18, 106 Steering shaft 19, 108 Floor 24, 104 Steering device 25, 107 Rotation transmission mechanism 26, 90, 109 Cover member 27, 110 Steering sprocket 28, 111 Movable sprocket 29 Steering wheel side sprocket 30 Movable shaft 31 Adjustment plate (adjustment member) 33 Steering Shaft 35, 114 First Steering Chain 36, 115 Second Steering Chain 46 Adjusting Bolt 47 First Cover Body 48, 92 Second Cover Body 51 First Side Plate 52 First Upper Plate 61 Second Side Plate 62, 93 Second Upper Plate (Upper Plate) 65 Extended Side Plate Portion (Extended Portion) 68 Upper Plate Main Body Portion 69 Inclined Body Portion 70 Foot Placeable Area 75 Opening 76 Inclined Plate (Inclined Body Portion) 79 Accelerator Pedal 80 Brake Pedal 94 Box Body Portion 113 Steering Wheel Side Sprocket F Road Surface L Foot

Claims

1. A vehicle body having a steering wheel, A steering device for steering the steering wheel, A driver's seat provided on the vehicle body, and having, The steering device is, A steering shaft provided on the driver's seat and connected to a steering wheel, A rotary transmission mechanism connected to the steering shaft for transmitting the rotation of the steering shaft to the steering wheel, A cover member installed on the floor of the driver's seat for covering the rotary transmission mechanism, And having, The rotary transmission mechanism is, A plurality of sprockets installed on the floor, A movable sprocket included in the plurality of sprockets and capable of changing its position relative to the floor, A chain suspended from the plurality of sprockets, An adjustment member for supporting the movable sprocket and enabling adjustment of the position of the movable sprocket, A fixing member for fixing the adjustment member to the floor, in an industrial vehicle having, The cover member is, A side plate rising from the floor, An upper plate connected to the upper edge of the side plate, and having, The fixing member is located below the movable sprocket so as to overlap the movable sprocket in plan view, The side plate has an extending portion extending along the outer peripheral edge of the movable sprocket and the fixing member. An industrial vehicle characterized by this.

2. The upper plate has an inclined portion that rises from the rear to the front. The industrial vehicle according to Claim 1, characterized by this.

3. The upper plate has a stepped portion having a height difference in the front-rear direction so as to follow the upper part of the rotary transmission mechanism, The rear of the stepped portion is lower than the front of the stepped portion. The industrial vehicle according to Claim 1, characterized by this.

4. The rotary transmission mechanism is, A fixed sprocket included in the plurality of sprockets and having a fixed position relative to the floor, The steering shaft, A steering sprocket mounted on the steering shaft, and having, The axis of the fixed sprocket and the axis of the steering sprocket are located in the front-rear direction. The industrial vehicle according to any one of Claims 1 to 3, characterized by this.

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