Work vehicles

Abstract

The present invention provides a work vehicle that can ensure sufficient visibility through the skylight, regardless of the installation of an air conditioning unit in the cabin. [Solution] The tractor 1 is a work vehicle equipped with a cabin 12 having a driver's seat 30, and includes a skylight 52 located in the roof portion 42 of the cabin 12, and an air conditioning duct front portion 49b located at the front of the roof portion 42, and the skylight frame 53 which opens to the skylight 52 is formed having a first frame portion 53a located behind the duct front portion 49b, and a second frame portion 53b which is continuous with the first frame portion 53a in a region that overlaps with the duct front portion 49b in the front-rear direction at least in part, and in a region where the duct front portion 49b is not located in a plan view.

Description

Technical Field

[0001] The present invention relates to a work vehicle.

Background Art

[0002] Conventionally, some work vehicles such as tractors are equipped with a cabin having a driver's seat. The cabin covers the space including the driver's seat, and some work vehicles have a skylight (sunroof) for lighting and ventilation inside the cabin provided on the roof of the cabin.

[0003] For example, in Patent Document 1, a cabin device attached to a tractor body is disclosed. In the cabin device, a skylight frame is installed at the upper front part of the cabin skeleton body.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Also, conventionally, some work vehicles are equipped with an air conditioning unit for conditioning the air in the interior space of the cabin. In order to discharge the conditioned air from the front side inside the cabin toward the driver's seat, an air conditioning duct and an outlet are provided at the front part of the roof of the cabin. Therefore, in the roof of the cabin, the space for securing the skylight is narrow, and the skylight becomes small, so there is a risk that the visibility through the skylight is reduced, or the amount of light and ventilation is reduced.

[0006] An object of the present invention is to provide a work vehicle that can sufficiently ensure the visibility of the skylight regardless of the installation of the air conditioning unit in the cabin.

Means for Solving the Problems

[0007] To solve the above problems, a work vehicle having a cabin with a driver's seat is provided, comprising a skylight positioned on the roof of the cabin and an air conditioning duct front positioned on the front of the roof, wherein the skylight frame opening to the skylight is formed having a first frame portion provided behind the duct front and a second frame portion that is continuous with the first frame portion in a region that overlaps with the duct front in the front-rear direction by at least a portion and in a region where the duct front is not positioned in a plan view. [Effects of the Invention]

[0008] The present invention provides a work vehicle that can ensure sufficient visibility through the skylight, regardless of the installation of an air conditioning unit in the cabin. [Brief explanation of the drawing]

[0009] [Figure 1] This is a schematic side view showing a tractor according to an embodiment of the present invention. [Figure 2] This is a perspective view showing the cabin of a tractor according to an embodiment of the present invention, viewed from the front. [Figure 3] This is a front view showing the cabin of a tractor according to an embodiment of the present invention. [Figure 4] This is a rear view showing the cabin of a tractor according to an embodiment of the present invention. [Figure 5] This is a side view showing the cabin of a tractor according to an embodiment of the present invention. [Figure 6] This is a top view showing the cabin of a tractor according to an embodiment of the present invention. [Figure 7] This is a perspective view showing the roof portion of the tractor cabin according to an embodiment of the present invention, viewed from above. [Figure 8] This is a perspective view showing the roof portion of the tractor cabin according to an embodiment of the present invention, viewed from the inside. [Figure 9] This is a top view showing the roof portion of the tractor cabin according to an embodiment of the present invention, with the upper portion removed. [Figure 10] This is a perspective view showing the roof portion of the tractor cabin according to an embodiment of the present invention, with the upper portion removed. [Figure 11] This is a side view showing the skylight and shielding member of the tractor cabin according to an embodiment of the present invention. [Figure 12] This is a side view showing the skylight and shielding member of the tractor cabin according to an embodiment of the present invention. [Figure 13] This is a bottom view showing a shielding member in a full light-shielding mode for the cabin of a tractor according to an embodiment of the present invention. [Figure 14] This is a bottom view showing a shielding member in a partial light-shielding mode for the cabin of a tractor according to an embodiment of the present invention. [Figure 15] This is a perspective view showing a shielding member in a partial light-shielding mode for the cabin of a tractor according to an embodiment of the present invention. [Figure 16] This is a perspective view showing a shielding member fixing portion for fixing a shielding member to the cabin of a tractor according to an embodiment of the present invention. [Modes for carrying out the invention]

[0010] The work vehicle of the present invention is designed to perform work while traveling in a field using an implement. One embodiment of the work vehicle of the present invention, a tractor 1, will be described with reference to the drawings. Figure 1 is a side view of the tractor 1.

[0011] As shown in Figure 1, the tractor 1 comprises a body 2 and implements (not shown), and is configured to perform tasks such as tilling using the implements while moving on the body 2. Various implements such as rotary tillers, harrows, loaders, and box scrapers are attached to the body 2 of the tractor 1 as needed to perform various tasks.

[0012] A pair of left and right front wheels 10 are provided on the lower front side of the vehicle body 2, and a pair of left and right rear wheels 11 are provided on the lower rear side of the vehicle body 2. In the present embodiment, as shown in FIG. 1, an example in which the front wheels 10 are composed of tires and the rear wheels 11 are composed of tires will be described, but the present invention is not limited to this example. In other examples, a so-called half crawler in which the front wheels 10 are tires and the rear wheels 11 are crawlers may be provided, or a so-called full crawler composed of crawlers instead of the tires of the front wheels 10 and the rear wheels 11 may be provided.

[0013] A cabin 12 for a driver to board is provided on the upper part of the vehicle body 2. Inside the cabin 12, a driver's seat 30 on which the driver sits is provided, and various operating tools are provided around the driver's seat 30.

[0014] For example, as an operating tool, a steering wheel 31 for operating the steering of the front wheels 10 is provided in front of the driver's seat 30. Around the steering wheel 31, a lift lever (not shown) for forcibly moving the working machine to the uppermost position or the lowermost position and a forward / backward switching lever (not shown) for switching the traveling direction of the vehicle body 2 between forward and backward are provided. On the floor surface below the steering wheel 31, various pedals (not shown) operated by the driver are provided. The various pedals (not shown) include a brake pedal for braking the vehicle body 2, a clutch pedal for operating a clutch (not shown) for switching the transmission / interruption of power, an accelerator pedal for increasing or decreasing the rotational speed of the engine 13 (the vehicle speed of the vehicle body 2), and the like.

[0015] An engine 13 as a power source is built in the front part of the vehicle body 2, and the engine 13 is covered by a bonnet 18. A transmission 14 is provided between a pair of left and right rear wheels 11 behind the engine 13. The power of the engine 13 is transmitted to the transmission 14, is shifted by the transmission 14, and is transmitted to each of the front wheels 10 and each of the rear wheels 11. A working machine lifting mechanism 15 and a working machine angle changing mechanism 16 for driving the working machine by the hydraulic pressure of hydraulic oil are provided at the rear part of the vehicle body 2, and a traction part 17 for towing the working machine is provided.

[0016] At the rear of the transmission 14 are a pair of left and right lower links 20, a top link 21, and a PTO shaft 22, with each lower link 20, top link 21, and PTO shaft 22 extending to the rear. The implement is connected to the rear ends of each lower link 20, top link 21, and PTO shaft 22, and the implement's drive shaft is connected to the PTO shaft 22, thereby being driven by the PTO shaft 22 via the drive shaft.

[0017] Next, we will describe the cabin 12. Figure 2 is a perspective view of the cabin 12 from the front, Figure 3 is a front view of the cabin 12, Figure 4 is a rear view of the cabin 12, Figure 5 is a side view of the cabin 12, and Figure 6 is a top view of the cabin 12.

[0018] The cabin 12 has a frame configuration that includes a pair of left and right front pillars 40 positioned in front of the driver's seat 30, a pair of left and right rear pillars 41 positioned behind the driver's seat 30, a front beam (not shown) positioned across the upper ends of the pair of front pillars 40, a rear beam (not shown) positioned across the upper ends of the pair of rear pillars 41, and side beams (not shown) positioned on each side across the upper ends of the front pillars 40 and the rear pillars 41.

[0019] The cabin 12 has a roof section 42 positioned on top of a roughly rectangular roof frame composed of a front beam section, a rear beam section, and left and right side beam sections. The cabin 12 has a windshield 43 positioned in the front area composed of the front beam section and a pair of front pillar sections 40, and a rear glass 44 positioned in the rear area composed of the rear beam section and a pair of rear pillar sections 41. The cabin 12 has side doors 45 positioned in the side area composed of the side beam sections, front pillar sections 40, and rear pillar sections 41, and the side doors 45 are supported by the rear pillar sections 41 so as to be openable and closable.

[0020] The roof section 42 is formed by combining the lower section 42a and the upper section 42b, and has a shape that is roughly rectangular in plan view and flattened in the vertical direction. Figure 7 is a perspective view of the front of the roof section 42 from above, and Figure 8 is a perspective view of the front of the roof section 42 from inside the cabin 12. Figure 9 is a top view of the roof section 42 with the upper section 42b removed, and Figure 10 is a perspective view of the rear of the roof section 42 with the upper section 42b removed, from above.

[0021] An air conditioning unit 47 is provided in the roof section 42 between the lower section 42a and the upper section 42b. The air conditioning unit 47 has an air conditioning body 48, an air conditioning duct 49, a front outlet 50, and a side outlet 51. Figure 9 shows the air conditioning body 48 removed. The roof section 42 is also provided with a skylight 52 formed on a flat surface of glass or acrylic, and a skylight frame 53 that opens to the skylight 52.

[0022] The air conditioning unit 48 is located at the rear of the roof section 42 and is housed in a storage compartment enclosed by a bulkhead 42c erected on the lower section 42a, for example. The front outlet 50 opens towards the interior of the cabin 12 at the front end of the roof section 42 in order to discharge conditioned air from the front of the cabin 12 towards the driver's seat 30. The side outlets 51 open towards the interior of the cabin 12 on both the left and right sides of the roof section 42 in order to discharge conditioned air from the sides of the cabin 12 towards the driver's seat 30. Although not shown, the air conditioning unit 47 may also have a rear outlet that discharges conditioned air from the rear of the cabin 12 towards the driver's seat 30.

[0023] The air conditioning duct 49 is piped from the air conditioning unit 48 to the front outlet 50 and the side outlet 51. Specifically, it has a pair of duct side sections 49a that are piped forward from the air conditioning unit 48 along the left and right sides of the roof section 42, and a pair of duct front sections 49b that are piped from the front ends of each of the pair of duct side sections 49a along the front side of the roof section 42. The air conditioning unit 47 has a front outlet 50 that communicates with each duct front section 49b. The left front outlet 50 and the right front outlet 50 may each have one front outlet 50, or they may each have two or more front outlets 50. The air conditioning unit 47 also has a side outlet 51 that communicates with each duct side section 49a. The left-side lateral discharge port 51 and the right-side front lateral discharge port 51 may each have one lateral discharge port 51, or they may each have two or more lateral discharge ports 51.

[0024] The skylight frame 53 is located at the front of the roof section 42 and penetrates vertically into an area that avoids the air conditioning unit 47. For example, the skylight frame 53 is formed with a first frame section 53a that is wider in the left-right direction behind the front of the duct 49b, and a second frame section 53b that is continuous with the first frame section 53a in an area that overlaps with the front of the duct 49b in the front-rear direction, but where the front of the duct 49b is not located in a plan view.

[0025] Specifically, the first frame portion 53a is formed in a roughly rectangular shape in plan view between the air conditioning unit 48 and the front duct portion 49b, and the second frame portion 53b is formed to protrude forward from the left-right center of the front end of the first frame portion 53a and to fit between the pair of front duct portions 49b and the left front discharge port 50 and the right front discharge port 50. As a result, the skylight frame 53 is formed in a convex shape that protrudes forward in plan view.

[0026] The skylight 52 is formed from a flat plate having a larger area than the skylight frame 53 in plan view, and is formed, for example, in a roughly rectangular shape in plan view. The skylight 52 is made of a transparent material such as glass or acrylic.

[0027] The skylight 52 is positioned above the skylight frame 53 and is attached to the upper part 42b of the roof section 42 via a skylight support 54 so as to close off the skylight frame 53 from above (outside). The upper part 42b has a skylight mounting section 65 at a position higher than the bottom surface of the drainage channel 60, which will be described later, and the skylight support 54 is attached to the skylight mounting section 65. The skylight support 54 is attached in a position that avoids the skylight frame 53 in a plan view, in particular a position that avoids the second frame section 53b, and spans from the front end of the skylight 52 to the skylight mounting section 65 on the upper part 42b of the roof section 42.

[0028] The skylight support portion 54 rotatably supports the skylight 52 with respect to the upper portion 42b and is composed of, for example, a spring plate that supports the front end of the skylight 52 while biasing the rear end of the skylight 52 upward. The skylight 52 rotates between an open state and a closed state relative to the skylight frame 53 by the skylight support portion 54. The open state is maintained by the upward bias of the skylight 52. The skylight 52 has an operating portion 52a, such as a handle, which is operated by the driver to switch between the open state and the closed state of the skylight 52. Depending on the operation of the operating portion 52a, the state of maintaining and releasing the closed state is switched, and when the closed state is released, it becomes possible to rotate to the open state.

[0029] The roof section 42 supports the skylight frame 53 with its upper section 42b and lower section 42a, while also providing a reinforcing frame 55, which is a reinforcing member that reinforces the support of the skylight frame 53. The reinforcing frame 55 is attached to the lower section 42a of the skylight frame 53, extending in the left-right direction, at a position close to the operating section 52a, and supports the rear end of the skylight frame 53. The reinforcing frame 55 is preferably longer than the rear end of the skylight frame 53 in the left-right direction. For example, if the operating section 52a is located near the rear edge of the skylight frame 53, the reinforcing frame 55 is provided behind the skylight frame 53 to reinforce the support of the rear side of the skylight frame 53. Alternatively, the reinforcing frame 55 may be provided in front of the skylight frame 53.

[0030] As shown in Figures 11, 12, 13, 14, and 15, the roof section 42 is provided with a shielding member 56 that shields the skylight 52 from the inside of the cabin 12. Figure 11 is a side view showing the skylight 52 and shielding member 56 in a closed state, Figure 12 is a side view showing the skylight 52 and shielding member 56 in an open state, Figure 13 is a bottom view showing the shielding member 56 in a fully shading mode, Figure 14 is a bottom view showing the shielding member 56 in a partially shading mode, and Figure 15 is a perspective view showing the shielding member 56 in a partially shading mode from below.

[0031] The shielding member 56 is attached to the underside of the lower part 42a of the roof section 42. The shielding member 56 is configured to change the shielding area of ​​the skylight 52 by being displaced in the front-rear direction, for example, by applying a sliding light-blocking plate (shade) or a retractable roller screen. Figures 11 and 12 illustrate an example in which the shielding member 56 is composed of a retractable roller screen, with the screen wound around a shaft. The screen is pulled out from the shaft by pulling it, and automatically wound back around the shaft by a spring or the like when the pulling is stopped. For example, the shielding member 56 is stored in a position corresponding to the rear of the skylight 52, and the tip of the shielding member 56 is displaced from a position corresponding to the rearmost end of the skylight 52 (fully open position) to a position corresponding to the foremost end of the skylight 52 (fully shielded position).

[0032] The shielding member 56 changes to one of several light-shielding modes by being displaced in the front-rear direction. Specifically, the shielding member 56 has at least three light-shielding modes: a fully open mode in which it is displaced to the fully open position to eliminate the shielding area and fully open the skylight 52; a fully shielded mode in which it is displaced to the fully shielded position to shield the entire area of ​​the skylight 52 as a shielding area; and a partial shielding mode in which it is displaced to a predetermined partial shielding position (for example, a position corresponding to the rear end of the second frame portion 53b) to shield the area of ​​the skylight 52 excluding the front part (second frame portion 53b) as a shielding area.

[0033] Furthermore, the roof section 42 is provided with a shielding member fixing section 57 that fixes the shielding member 56 to the skylight 52 at one of a plurality of different fixing positions in the front-rear direction. Regardless of the shielding member fixing section 57, the shielding member 56 is normally maintained in the fully open mode and stored in the roof section 42. As shown in Figures 11, 12 and 16, the shielding member fixing section 57 has at least a first fixing section 57a ​​that fixes the shielding member 56 in the partially shading position when it has changed to the partially shading mode, and a second fixing section 57b that fixes the shielding member 56 in the fully shading position when it has changed to the fully shading mode. Figure 16 is a perspective view of the shielding member fixing section 57 from the rear.

[0034] For example, the shielding member 56 has a rod-shaped supported member 56a that is long in the left-right direction, and the shielding member fixing part 57 has a pair of first fixing parts 57a and a pair of second fixing parts 57b that engage with both left and right ends of the supported member 56a. For example, the shielding member fixing part 57 may be composed of a stay 57c in which the first fixing part 57a and the second fixing part 57b are integrally formed in a stepped manner, as shown in Figures 11, 12 and 16. Alternatively, the shielding member fixing part 57 may have the first fixing part 57a and the second fixing part 57b as separate members.

[0035] Furthermore, the roof section 42 has a drainage groove 60 (drainage section) recessed in the upper surface of the upper part 42b of the roof section 42, as shown in Figures 2, 6, and 7, in order to drain water that accumulates on the upper surface of the roof section 42 due to rainfall, etc. The roof section 42 has its apex further back than the center in the front-rear direction, and slopes downward toward the front and rear from the apex. The roof section 42 also has its apex in the center in the left-right direction, and slopes downward toward the left and right from the apex. The drainage groove 60 is sloped in the same way as the roof section 42.

[0036] The drainage channel 60 has a first groove 61 formed in the front-rear direction, for example, having a first groove 61 on each of the left and right sides. The front end of the first groove 61 is directed toward both the left and right ends of the windshield 43 (the upper ends of the pair of front pillars 40) and leads to drainage outlets 61a formed on both the left and right ends of the front surface of the roof 42. The rear end of the first groove 61 is directed toward both the left and right ends of the rear window 44 (the upper ends of the pair of rear pillars 41) and leads to drainage outlets 61b formed on both the left and right ends of the rear surface of the roof 42. As a result, drainage is directed toward the pair of front pillars 40 and the pair of rear pillars 41, so that drainage does not splash onto the driver when getting in or out of the side door 45, and as drainage is directed away from the center of the windshield 43 and the rear window 44, deterioration of the driver's forward and rearward visibility can be suppressed.

[0037] The outer edge of the first groove 61, which extends in the front-rear direction, is formed with a raised, mountain-like shape, which prevents water accumulated in the first groove 61 from overflowing outwards in the left-right direction and prevents drainage from splashing onto the driver when getting in or out of the side door 45. For example, the left edge of the left first groove 61 is raised with a mountain-like shape, and the right edge of the right first groove 61 is raised with a mountain-like shape.

[0038] Furthermore, the drainage channel 60 has a second groove 62 formed in the left-right direction, for example, the roof section 42 has a second groove 62 on both the front and rear sides. The left and right ends of the front second groove 62 face the left and right ends of the windshield 43 (the upper ends of the pair of front pillars 40) and lead to drainage outlets 61a formed on both the left and right ends of the front surface of the roof section 42. The left and right ends of the rear second groove 62 face the left and right ends of the rear window 44 (the upper ends of the pair of rear pillars 41) and lead to drainage outlets 61b formed on both the left and right ends of the rear surface of the roof section 42.

[0039] The drainage channel 60 has a third groove 63 formed around the skylight frame 53, and the upper end of the skylight frame 53 is positioned higher than the bottom surface of the third groove 63, and the skylight 52 is supported by the skylight frame 53 at a position higher than the bottom surface of the third groove 63. A second groove 62 is formed on the front side of the skylight frame 53, and the third groove 63 is connected to the second groove 62. A skylight mounting portion 65 for attaching the skylight support portion 54 of the skylight 52 is formed in the second groove 62 at a position higher than the bottom surface. The bottom surface of the third groove 63 around the skylight frame 53 is positioned higher than the bottom surface of the second groove 62, and water accumulating around the skylight frame 53 flows into the second groove 62.

[0040] The outer edges of the second grooves 62, which extend in the left-right direction, are formed with a raised, mountain-like shape to prevent water accumulated in the second grooves 62 from overflowing outwards in the front-rear direction. For example, the front edge of the front second groove 62 is raised in a mountain-like shape, and the rear edge of the rear second groove 62 is also raised in a mountain-like shape.

[0041] Furthermore, in the roof section 42, the storage section for the air conditioning unit 47's air conditioning body 48 is formed by a partition wall 42c erected on the lower section 42a, and it is necessary to seal the space between the upper section 42b and the partition wall 42c to seal the storage section. Here, the drainage channel 60 has a fourth groove 64 formed along the partition wall 42c of the storage section. The lower surface of the fourth groove 64 recessed in the upper surface of the upper section 42b is close to the partition wall 42c, which allows the sealing member between the upper section 42b and the partition wall 42c to be made relatively thin, thereby simplifying and reducing the cost of the internal sealing structure. The fourth groove 64 is connected to the first groove 61, and the bottom surface of the fourth groove 64 is set at a higher position than the bottom surface of the first groove 61, so that water accumulating in the fourth groove 64 flows into the first groove 61.

[0042] As described above, according to this embodiment, the tractor 1 is a work vehicle equipped with a cabin 12 having a driver's seat 30, and is equipped with a skylight 52 located in the roof portion 42 of the cabin 12, and an air conditioning duct front portion 49b located in the front of the roof portion 42, and the skylight frame 53 which opens to the skylight 52 is formed having a first frame portion 53a located behind the duct front portion 49b, and a second frame portion 53b which is continuous with the first frame portion 53a in a region that overlaps with the duct front portion 49b in the front-rear direction at least in part, and in a region where the duct front portion 49b is not located in a plan view.

[0043] As a result, in tractor 1, by providing the skylight frame 53 while avoiding the front part 49b of the air conditioning duct, the opening area of ​​the skylight frame 53 can be maximized, and the amount of light and ventilation through the skylight 52 can be increased. In addition, a wide upward field of view can be obtained through the skylight 52, ensuring maximum visibility performance and improving usability. For example, when a front loader is attached to the front of tractor 1, the bucket attached to the tip of the arm can be seen through the skylight 52 when the arm of the front loader is raised.

[0044] According to this embodiment, the tractor 1 is provided with a skylight support portion 54 that supports the skylight 52 at a position that overlaps with the front part 49b of the duct in a plan view.

[0045] As a result, in tractor 1, by positioning the skylight support parts 54, such as hinges, in a location invisible to the driver, the deterioration of visibility caused by the skylight support parts 54 can be reduced, thereby improving usability. Furthermore, although the skylight frame 53 is sealed by being closed from above by the skylight 52, if a member supporting the skylight 52 is provided on the inside of the skylight frame 53 in a plan view, there is a problem of water leakage from the joint between that member and the skylight 52. Even if a member supporting the skylight 52 is provided on the outside of the skylight frame 53 in a plan view, if that member is positioned across the outside and inside of the skylight frame 53 in a plan view, there is a problem of the seal of the skylight frame 53 being impaired by that member. In contrast, by providing a skylight mounting part 65 on the outside of the cabin 12 to which the skylight 52 is attached via the skylight support parts 54, the above problems can be avoided, and water leakage caused by the arrangement of the skylight support parts 54 and the skylight mounting part 65 can be suppressed.

[0046] According to this embodiment, the tractor 1 is provided with a drainage groove 60 (drainage section) formed on the upper surface of the roof section 42, and the skylight support section 54 supports the skylight 52 at a position higher than the drainage groove 60.

[0047] As a result, the tractor 1 can improve the drainage performance of the skylight support 54 and suppress the occurrence of rust in the skylight support 54.

[0048] According to this embodiment, the tractor 1 is equipped with an operating unit 52a for switching between an open state and a closed state of the skylight 52, and a reinforcing frame 55 is provided on the roof portion 42 to reinforce the support of the skylight frame 53 on the operating unit 52a side of the skylight frame 53.

[0049] As a result, in tractor 1, when the driver operates the control unit 52a up and down to open and close the skylight 52, a load is applied to the skylight frame 53 and roof section 42 near the control unit 52a. However, since the reinforcing frame 55 supports the skylight frame 53 on the control unit 52a side, the load applied to the skylight frame 53 and roof section 42 when opening and closing the skylight 52 can be suppressed. Furthermore, since the skylight frame 53 opens into the roof section 42, providing the reinforcing frame 55 near the skylight frame 53 can suppress vibrations of the roof section 42 near the skylight frame 53. Compared to a configuration with a frame that reinforces the entire skylight frame 53, the configuration with the reinforcing frame 55 only on the control unit 52a side simplifies the structure and reduces costs while reinforcing the support of the skylight 52 and skylight frame 53.

[0050] According to this embodiment, the reinforcing frame 55 is arranged across the left-right direction of the skylight frame 53.

[0051] This makes it possible to reduce the load on the skylight frame 53 and the roof section 42 when opening and closing the skylight 52 in the tractor 1.

[0052] According to this embodiment, the tractor 1 includes a shielding member 56 that shields the skylight 52, and a shielding member fixing part 57 that fixes the shielding member 56 at a predetermined position relative to the skylight 52.

[0053] As a result, the amount of light entering through the skylight 52 can be limited by the shielding member 56 in the tractor 1.

[0054] According to this embodiment, the shielding member 56 is configured to be displaced in the front-rear direction to change the shielding area of ​​the skylight 52, and the shielding member fixing part 57 fixes the shielding member 56 at one of at least two or more fixing positions in the front-rear direction.

[0055] This allows the tractor 1 to change its shielding area depending on the situation, thereby improving comfort.

[0056] In the embodiments described above, an example was shown in which the work vehicle of the present invention is composed of a tractor 1. However, the present invention is not limited to this example, and the work vehicle of the present invention may be composed of other agricultural machinery or other work vehicles.

[0057] Furthermore, the present invention may be modified as appropriate, provided that it does not contradict the gist or idea of ​​the invention as can be read from the claims and the specification as a whole, and work vehicles with such modifications are also included in the technical concept of the present invention.

[0058] [Notes on the invention] The following is an overview of the invention extracted from the above-described embodiments. Note that each configuration and processing function described below can be selected and combined as desired.

[0059] <Note 1> A work vehicle equipped with a cabin having a driver's seat, A skylight is located in the roof of the cabin, The roof section is equipped with an air conditioning duct front section located at the front of the roof section, The skylight frame opening to the skylight is formed having a first frame portion provided behind the front of the duct, and a second frame portion that is continuous with the first frame portion in a region that overlaps with the front of the duct in the front-to-back direction, at least in part, and in a region where the front of the duct is not located in a plan view. A work vehicle characterized by the following features.

[0060] <Note 2> The work vehicle according to Appendix 1, characterized in that it is provided with a skylight support portion that supports the skylight at a position that overlaps with the front of the duct in a plan view.

[0061] <Note 3> The roof section is equipped with a drainage section formed on the upper surface of the roof section, The work vehicle according to Appendix 2, characterized in that the skylight support portion supports the skylight at a position higher than the drainage portion.

[0062] <Note 4> The skylight is equipped with an operating unit for switching between an open state and a closed state. A work vehicle according to any one of the appendices 1 to 3, characterized in that a reinforcing member is provided on the roof portion to reinforce the support of the skylight frame on the operating portion side of the skylight frame.

[0063] <Note 5> The work vehicle according to Appendix 4, characterized in that the reinforcing member is arranged across the left-right direction of the skylight frame.

[0064] <Note 6> A shielding member that blocks the aforementioned skylight, A work vehicle according to any one of the appendices 1 to 5, characterized by comprising a shielding member fixing part for fixing the shielding member at a predetermined position relative to the skylight.

[0065] <Note 7> The shielding member is configured to be displaced in the front-rear direction to change the shielding area of ​​the skylight. The work vehicle according to Appendix 6, characterized in that the shielding member fixing portion fixes the shielding member at one of at least two or more fixing positions in the front-rear direction. [Explanation of Symbols]

[0066] 1. Tractor (work vehicle) 2 car bodies 12 cabins 13 Engine 14. Transmission 30 Driver's seat 31 Handle 40 Anterior column 41 Posterior column 42 Roof section 42a Lower part 42b Upper part 42c Bulkhead 43 Windshield 44 Rear window 45 Side Door 47 Air conditioning unit 48 Air conditioning unit 49. Air conditioning ducts 49a Duct side 49b Front of the duct 50 Front exhaust outlet 51 Side discharge port 52 Skylight 52a Operation section 53 Skylight frame 53a 1st frame part 53b 2nd frame part 54 Skylight support 55 Reinforcement frame (reinforcement member) 56 Shielding member 56a Supported member 57 Shielding member fixing part 57a 1st fixed part 57b 2nd fixed part 60 Drainage channel (drainage section) 61 First groove 62 Second groove 63 Third groove 64. Fourth groove 65 Skylight mounting section

Claims

1. A work vehicle equipped with a cabin having a driver's seat, A skylight is located in the roof of the cabin, The roof section is equipped with an air conditioning duct front section located at the front of the roof section, The skylight frame opening to the skylight is formed having a first frame portion provided behind the front of the duct, and a second frame portion that is continuous with the first frame portion in a region that overlaps with the front of the duct in the front-rear direction, at least in part, and in a region where the front of the duct is not located in a plan view. A work vehicle characterized by the following features.

2. The work vehicle according to claim 1, further comprising a skylight support portion that supports the skylight at a position overlapping with the front of the duct in a plan view.

3. The roof section is equipped with a drainage section formed on the upper surface of the roof section, The work vehicle according to claim 2, characterized in that the skylight support portion supports the skylight at a position higher than the drainage portion.

4. The skylight is equipped with an operating unit for switching between an open state and a closed state. The work vehicle according to claim 1, characterized in that a reinforcing member is provided on the roof portion to reinforce the support of the skylight frame on the operating portion side of the skylight frame.

5. The work vehicle according to claim 4, characterized in that the reinforcing member is arranged in the left-right direction.

6. A shielding member that blocks the aforementioned skylight, The work vehicle according to claim 1, further comprising a shielding member fixing part for fixing the shielding member at a predetermined position relative to the skylight.

7. The shielding member is configured to be displaced in the front-rear direction to change the shielding area of ​​the skylight. The work vehicle according to claim 6, characterized in that the shielding member fixing portion fixes the shielding member at one of at least two or more fixing positions in the front-rear direction.

Images