JPH11263122A - Cabin of working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the comfortableness and working effectiveness of a driver in the cabin of a working vehicle covering the operation part of a machine body. SOLUTION: A windshield 21 of the cabin 8 of a working vehicle and a seam frame 24 are installed on a straight line tying the view line of the driver 25 to a front axle 26, and a duct of an air-conditioner device 12 is configured so as to have such a side elevation that the part near the windshield becomes a defrostor blowoff approx. in the center blowoff of the cabin. A projection is provided in the area to a blowoff hole in the side duct, and part of a roof 11 is formed in an inner/outer air lead-in duct, and a door window 9 is fitted with hinge 81 to work also as a hinge for a side window 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cabin of a work vehicle mounted on a work vehicle such as a tractor so as to cover a driving section of the work vehicle.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Utility Model Laid-Open No.
As shown at 176, a cabin mounted on a work vehicle such as a tractor so as to cover a driving unit of the work vehicle is known, and a side window at a rear side portion of the cabin is provided with a cabin frame constituting the cabin. According to the specifications described above, one of an openable window configured to be openable and a fixed window configured to be always closed is determined.

In such cabins, there is a cabin in which an air conditioner is installed in a cabin roof or the like.
The outlets for blowing the cooling air from the air conditioner, the warm air of the defroster, etc. into the cabin are provided on both sides of a sun visor provided at the front of the cabin roof. This outlet and the air conditioner are connected by a dedicated duct,
The duct was formed separately from the cabin roof.

[0004]

However, in the above-described cabin, it is difficult to obtain a forward and downward view due to the blind spot formed by the joint between the front window and the lower glass and the blind spot formed by the front axle case.

[0005] Further, since the air outlets of the air conditioner are provided on both sides of the sun visor, the air outlets cannot be formed large. In some cases, the effect of the defroster could not be sufficiently obtained.
The air outlet and the air conditioner are connected by a dedicated duct, and the duct is formed separately from the cabin roof.Therefore, a lot of dedicated space is required in the cabin, and the number of parts and the number of assembly steps are reduced. It was increasing.

Since the hinge of the door window and the hinge of the side window are provided by different members, the number of parts is large, the number of steps for removing and assembling is large, and the time required for maintenance work is long.

[0007]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. That is, in a cabin of a work vehicle that covers a driving unit of an airframe, an air conditioner is provided above the cabin, and a blowing duct of the air conditioner is viewed from a side,
A substantially central portion of the cabin is blown out, and a vicinity of the front window of the cabin is configured as a defroster blowout. A cooling / heating distribution plate is provided at a substantially central portion in the vertical direction of the duct, and a cold wind is provided on the driver's head. And the wind can be distributed so that a warm wind is blown to the feet.

Further, in a cabin of a work vehicle that covers a driving unit of an airframe, an air conditioner is provided above the cabin, and a part of a hollow roof is formed of a permeable member to introduce the inside and outside air of the air conditioner. It was formed in a duct, and a blower motor was arranged near the inside / outside air switching duct.

Further, in a cabin of a work vehicle that covers a driving unit of an airframe, a side window that can be opened and closed is provided at a rear portion of the cabin of the work vehicle, and a front portion of the side window is provided on a side of the cabin of the work vehicle. An openable and closable door window is provided, and a door window hinge that also serves as a side window hinge is provided.

Further, in a cabin of a work vehicle that covers a driving unit of an airframe, a front window is provided at a front portion of the cabin of the work vehicle, and a front lower window is provided at lower left and right sides of the front portion of the cabin. The joint frame between the front window and the front lower window is arranged on a straight line connecting the driver's eyes and the front axle case.

[0011]

Next, an embodiment of the present invention will be described. FIG. 1 is an overall side view showing a tractor equipped with a cabin of the present invention, FIG. 2 is a front view showing the configuration of a front window and a lower glass, FIG. 3 is a plan view showing an air duct, and FIG. Side view, FIG. 5 showing
6 is a side view showing the side air duct, FIG. 6 is a plan view showing the side air duct, FIG. 7 is a front sectional view of the side air duct, FIG. 8 is a side sectional view showing the front duct, and FIG. 9 is a side view showing the inside / outside air switching duct. , FIG. 10 is a rear view showing an outside air introduction portion of the cabin roof, FIG. 11 is a side view showing a door hinge, FIG. 12 is a partial cross-sectional view of the same, FIG. 13 is a side view showing a fender, and FIG. is there.

First, the overall structure of a tractor equipped with a cabin according to the present invention will be described with reference to FIG. A hood 4 is disposed at the front of the machine which suspends the front wheel 2 and the rear wheel 3 at the front and rear, and an engine 5 is built in the hood 4.
A steering handle 6 is provided behind the hood 4, and a seat 7 is provided behind the steering handle 6. Steering handle 6 and seat 7
Are covered by the cabin 8.

The cabin 8 is fixed to the machine body through an elastic member such as a vibration-proof rubber, so that vibration of the machine body is hardly transmitted to the cabin 8 and noise in the cabin 8 is reduced. Is configured. The cabin has a so-called floating structure. Also,
A door window 9 is formed on a side portion of the cabin 8, and a side window 10 is formed behind the door window 9. An air conditioner 12 is provided inside a cabin roof 11 of the cabin 8. ing.

A clutch housing 13 is connected to the rear of the engine 5, and a transmission case 14 is connected to the rear of the clutch housing 13.
To be driven. The driving force of the engine 5 is transmitted to a power take-off shaft 15 protruding from the rear end of the transmission case 14 to drive the power take-out shaft (hereinafter referred to as a PTO shaft) 15, and a work machine mounting device 16 at the rear end of the machine body. It is configured to drive the working machine connected to the. The front wheel 2 is mounted on a front axle 26.

Next, the front window 21 formed at the front of the cabin will be described. In FIGS. 1 and 2, a front frame 23 constituting an edge peripheral portion is disposed on the front surface of the cabin 8, and a lower portion of the front frame 23 is
One end of the joint frame 24 is fixed. The joint frame 24 is provided laterally between a connecting portion 27 for connecting the hood 4 forward and the front frame 23. The front window 21 is fitted and held by the front frame 23, the joint frame 24, the cabin roof 11, and the joint 27. The front window 21 has a shape in which the lower center portion is located above the lower ends on both sides.
3 and the joint frame 24, the cabin roof 11, and the joint portion 27. In addition, a hole is provided in the central portion to which a front wiper (not shown) can be attached.

A lower glass 22 is provided below the front window 21. The lower glass 22 is fitted and held by a front frame 23, a joint frame 24, and a joint 27. The lower glass 22 is surrounded by the front frame 23, the joint frame 24, the joint 27, and the step of the cabin 8 (not shown), and is formed in a shape corresponding to a pentagon to be formed. The vicinity of the front wheel 2 is configured to be visible.

In this configuration, the joint frame 24 is arranged on a straight line connecting the line of sight of the driver 25 sitting on the seat 7 and the front axle 26.
When the driver 25 sitting in the seat 7 turns his / her gaze downward to the right or left and looks near the front wheel 2, a part of the field of view is hidden by the front axle 26. In this case, the driver's 25 Since the joint frame 24 is arranged on a straight line connecting the axle 26, the field of view is not further obstructed by the joint frame 24. That is, since the blind spot of the joint frame 24 and the blind spot of the front axle 26 overlap, the blind spot can be reduced. Thereby, the visibility near the front wheel 2 is improved, the visibility of the ground in front is improved, and the driver 25 can visually check the ground condition and perform work, thereby improving the workability.

Next, the duct mechanism 30 of the air conditioner 12 provided in the cabin roof 11 will be described. 3 to 10, the duct mechanism 30 includes a blower motor 3
2 comprises an inside / outside air switching duct 31 and a cooling duct 33, a heating duct 34, a front duct 35, and side ducts 36, 36, which are disposed at the front. Further, outside air is introduced into the cabin roof 11 by an inside / outside air introduction duct 37 provided at a rear portion of the cabin roof 11.

At the rear of the cabin roof 11, air introduced into the air conditioner 12 is supplied to inside air, which is air in the cabin 8,
Alternatively, a blower motor 32 is provided in front of an inside / outside air switching duct 31 configured to be able to switch between outside air, which is air outside the cabin 8, or both inside and outside air, and is introduced by the inside / outside air switching duct 31. The supplied gas is sent forward. A cooling duct 33 is provided in front of the blower motor 32.
Is fitted and fixed.

The cooling duct 33 is provided with a cooler (not shown) to which a cooling pipe 39 connected to a compressor (not shown) provided inside the hood 4 is connected.
By operating the compressor, the air introduced into the cooling duct 33 can be cooled.
In the cooling duct 33, a cooler (not shown) is disposed above the cooling duct 33, so that the cooled air is supplied from the upper part of the cooling duct 33 to the heating duct 34 located further forward.

A heating duct 34 is provided in front of the cooling duct 33.
Are arranged and fixedly fitted to the cooling duct 33. In the heating duct 34, the heat generated by the engine 5 is introduced by a heat hose 38, and the air can be heated by a heater (not shown). In the heating duct 34, the heater is provided at a lower part in the heating duct 34, and the air heated by the heater is configured to be sent forward in the lower part of the heating duct 34. .

A front duct 35 is provided in front of the cooling duct 34.
And is fitted and fixed to the front of the heating duct 34. A defroster port 41 is provided at the bottom of the front duct 35.
Is provided, and the blown air is blown out to the front window 21, and the inside of the cabin 8 is moved along the front window 21.
The air is supplied to the feet of the driver 25. Therefore, by sending warm air from the defroster port 41,
The fogging inside the front window 21 can be eliminated. A wind direction adjuster 47 is attached to the defroster port 41 so that the direction of air sent from the defroster port 41 can be adjusted. An air mix chamber 42 is formed at the front of the front duct 35, and the air supplied to the front duct 35 from the rear is supplied to the side ducts 36 and left and right of the front duct 35. 36.

Side ducts 36 are fitted and fixed to both left and right sides of the front duct 35, and extend right and left from the center front portion of the cabin 8 in the cabin roof 11 so that the cabin 8 At the side of the rear. On the side surface of the side duct 36, there are provided two outlets 45 facing the inside of the cabin. Further, the central portion of the side duct 36, the outlet 45
A convex portion 43 is provided between 45. The convex part 4
Numeral 3 is configured to protrude inward from below the side duct 36 so that the air supplied to the side duct 36 can be distributed to the outlets 45. The cabin roof 11 is located below the projection 43.
And a strength member 48 for improving the strength of the cabin 8 is disposed. The air outlet 45 is provided with a wind direction adjuster 46 so that the direction of air sent from the air outlet 45 can be adjusted.

At the center of the front duct 35, a pivot 51 pivotally supported on the side wall of the front duct 35 is provided horizontally, and a cooling / heating distribution plate 52 is fixed to the pivot 51. Have been. The air cooled by the cooling duct 33 and the air heated by the heating duct 34 are supplied to the front duct 35. The cooled air (cold air) is sent above the front duct 35, and the heated air (warm air) is sent below the front duct 35.

In this configuration, the air supply to the defroster port 41 and the air mix chamber 42 can be distributed by rotating the cooling / heating distribution plate 52 up and down. By rotating the cooling / heating distribution plate 52 to the uppermost position, all air can be supplied to the defroster port 41, and by rotating to the lowermost position, all air supply can be supplied to the air mix chamber 42. It is possible to supply air to the outlet 45 of the ducts 36. Further, by rotating the neutral position, air can be supplied to both the defroster port 41 and the air mix chamber 42. Further, by rotating upward from the neutral position, the amount of air supplied to the defroster port 41 can be made larger than the amount of air supplied to the air mix chamber 42. By rotating below the neutral position, the amount of air supplied to the defroster port 41 can be made smaller than the amount of air supplied to the air mix chamber 42.

For this reason, in a situation where warm air and cool air are supplied to the front duct 35, the cool air is supplied above the front duct 35 and the warm air is supplied below the front duct 35. By rotating the plate 52 to the neutral position, warm air can be sent from the defroster port 41 and blown to the front window 21 to prevent fogging.
While warming the feet of the driver 5, cool air is supplied to the air mix chamber 42 and supplied to the outlet 45 of the side duct 36, so that the head of the driver 25 can be cooled. Further, the pivot 51 of the cooling / heating distribution plate 52 is linked to a turning means such as a rod or a wire (not shown) so that the driver can turn inside the cabin 8. Further, the ratio of the cool air and the warm air sent to the air mix chamber 42 is adjusted by the rotation position of the cooling / heating distribution plate 52, the cool air and the warm air are mixed in the air mix chamber 42, and the air discharged from the outlet 45 is mixed. The temperature of is adjustable.

A blower motor 32 is mounted in front of the inside / outside air switching duct 31 so that air introduced into the inside / outside air switching duct 31 can be sent to a cooling duct 33 disposed in front. Have been. The blower motor 3
2 is provided in the vicinity of the inside / outside air switching duct 31, the distance from the blower motor 32 to the outside air introduction port 65 and the inside air introduction port 66 can be shortened, and the resistance during intake can be reduced. 32 can improve the intake efficiency. Further, the space required for the inside / outside air switching duct 31 and the blower motor 32 can be reduced, and the space inside the cabin roof 11 can be used effectively. Thereby, the degree of freedom in designing the duct mechanism 30 can be improved.

Behind the inside / outside air switching duct 31, there is provided an inside / outside air introduction duct 37 formed on the rear side surface of the cabin roof 11 by a permeable member, so that outside air can be introduced into the cabin roof 11. I have. An outside air introduction port 65 is provided on a rear side surface of the inside / outside air switching duct 31 so that outside air introduced from the inside / outside air introduction duct 37 can be introduced into the inside / outside air switching duct 31. An inside air introduction port 66 is provided on the bottom surface of the inside / outside air switching duct 31 so that inside air in the cabin 8 can be introduced into the inside / outside air switching duct 31.

Behind the inside / outside air switching duct 31,
A pivot 63 pivotally supported on the side wall of the inside / outside air switching duct 31 is pivotally supported, and an inside / outside air switching plate 64 is fixed to the pivot 63. The inside / outside air switching plate 6
4 is provided between the inside air introduction port 66 and the outside air introduction port 65, and the ratio between the inside air and the outside air introduced into the inside / outside air switching duct 31 can be adjusted by rotating the inside / outside air switching plate 64. Is configured. By rotating the inside / outside air switching plate 64 to the uppermost position, the outside air introduction port 65 is closed, and only the inside air in the cabin 8 is introduced into the inside / outside air switching duct 31. Further, by rotating the inside / outside air switching plate 64 to the lowermost position, the inside air introduction port 6 is opened.
6 can be closed and only outside air can be introduced into the inside / outside air switching duct 31.

The inside / outside air introduction duct 37 is constituted by an iron plate 71 provided with a large number of holes in the present embodiment, and a filter 72 is provided behind the outside iron plate 71. It prevents dust and insects from entering. Further, the inside / outside air introduction duct 37 may be a member having air permeability and not easily deformed, and is not limited to the present embodiment.

Next, the structure of the door hinge will be described.
In FIGS. 1, 11, and 12, two upper and lower door hinges 81 are provided on the outer side surface of the center pillar 91.
A door window 9 is provided in front of the center pillar 91, and a side window 10 is provided behind the center pillar 91. The door hinge 81
Is constituted by a fixing portion 81a for fixing the door hinge 81 to the center pillar 91, a pin 92 of the door support stay 82, and a pivot portion 81b for pivotally supporting the pin 93 of the side window support stay 88. The fixing portion 81a is provided with long holes 94. A bolt is inserted into the long hole 94, and the bolt is screwed on the outer surface of the center pillar 91 so that the door hinge 81 can be fixed. Since the long hole 94 is configured to be long in the front-rear direction, the fixed position of the door hinge 81 can be finely adjusted in the front-rear direction.

At the rear end of the door support stay 82, a collar 82 is provided.
a is fixed by welding, and the pin 92 is connected to the pivot 81b.
Is inserted into the collar 82a through the
1b is pivotally supported. Door support stay 82
Are provided with holes at the front and rear of the bolt 84.8.
4 can be inserted. The door window 9 can be sandwiched between the door support stay 82 and the door holding plate 83 by inserting the door support stay 82, the door window 9, and the door holding plate 83 into the bolt 84 and screwing the nut 85. With the above configuration, the door support stay 8
2 is a pin 9 pivotally supported by a pivot portion 81b of the door hinge 81.
2 about the door window 9.
Can be opened and closed.

A pin 93 inserted into the front end of the side window support stay 88 is rotatably supported at the rear end of the pivot 81b. The side window 10 is fixedly screwed to the side window support stay 88 by screwing bolts and nuts (not shown) together with a holding plate (not shown). For this reason, the side window 10 is configured to be openable and closable by rotating the side window support stay 88 about a pin 93 rotatably supported at the rear end of the pivot portion 81b of the door hinge 81. That is, since the front part of the side window 10 is supported, the opening degree of the rear part of the side window 10 can be made large.

As described above, since the door support stay 82 and the side window support stay 88 are supported by the door hinge 81, the number of components can be reduced, and the members for supporting the door support stay 82 and the side window support stay 88 can be reduced. Since the space occupied can be reduced, the degree of freedom in design can be improved, and the area occupied by the members supporting the door support stay 82 and the side window support stay 88 in the center pillar 91 can be reduced, so that the external appearance can be reduced. Performance can be improved. Further, screw holes for screwing and fixing members supporting the door support stay 82 and the side window support stay 88 provided on the center pillar 91 can be omitted, and the number of manufacturing steps can be reduced. Can be improved in strength. Further, with the above configuration, the rear portion of the side window 10 can be opened, so that the driver 2
5 can open the side window 10 and improve the visibility for viewing the working machine mounted on the rear part of the work vehicle 1.

Next, the fender 101 will be described.
1, 13, and 14, the fender 101 is fixed above the rear wheel 3 by screwing a screw (not shown) on a lower side surface of the cabin 8. The fender 101 is formed by resin molding. In this configuration,
The mud and gravel wound by the rear wheel 3 can be prevented from scattering. Further, a rear combination lamp case 101b integrally formed with the fender 101 is provided at a rear portion of the fender 101, and the rear combination lamp 102 can be mounted on the rear combination lamp case 101b. A hollow portion 101a is provided inside the fender 101. The hollow portion is a rear combination lamp case 101b at a rear end of the fender 101 from a front end of the fender 101.
It is provided inside the fender 101 in a range up to the vicinity. A harness (not shown) of the rear combination lamp 102 is provided in the hollow portion 101a.

Since the fender 101 is made of resin as described above, the shape of the fender 101 can be easily manufactured, and the design can be improved. The rear combination lamp case 101b can be integrally formed with the fender 101, and the harness (not shown) of the rear combination lamp 102 can be protected by passing the rear combination lamp 102 through the hollow portion 101a of the fender 101.

[0037]

As described above, the present invention has the following advantages. That is, in the cabin of the work vehicle that covers the driving unit of the body,
An air-conditioning device is provided above the cabin, and a blowing duct of the air-conditioning device is configured such that a portion near the center of the cabin serves as a blowing device and a portion near the front window of the cabin serves as a defroster blowing device in a side view. A cooling / heating distribution plate is provided at the approximate center of the vertical direction to blow cold wind to the driver's head and to distribute warm air to the feet so that warm air is blown out. In the blowout in the vicinity of the center of the cabin, the lower part is configured to be a defroster blowout, and a cooling / heating distribution plate is provided at the center in the vertical direction of the duct,
The wind was blown out to the driver's head, and the wind was distributed to the feet so as to blow out the warm wind.Therefore, the fogging of the front window was blown with warm air from the defroster port, and the wind was eliminated. Even when the temperature inside the cabin rises due to warm air for eliminating fogging, cool air is blown to the driver's head, it is possible to ensure the comfort of the driver and improve workability. . By the rotation position of the cooling / heating distribution plate provided in the front duct, the ratio of the cool air and the warm air sent to the air mix chamber was adjusted, and the cool air and the warm air were mixed and uniformized in the air mix chamber. Thereafter, the temperature of the air discharged from the outlet can be adjusted. Further, since the above effects can be realized by one air conditioner, the weight of the work vehicle can be reduced, the load on the engine can be reduced, and the space occupied by the air conditioner can be reduced. Therefore, the degree of freedom in design can be improved.

According to a second aspect of the present invention, in a cabin of a work vehicle that covers a driving unit of an airframe, an air conditioner is provided above the cabin, and a part of a hollow roof is formed of a permeable member. Formed in the inside and outside air introduction duct of the device and the blower motor is arranged near the inside and outside air switching duct, so there is no need to separately configure the inside and outside air introduction duct, and the number of components can be reduced, reducing production costs It is possible. In addition, since a part of the roof is made of a breathable member and formed in the inside and outside air introduction duct of the air conditioner, the space inside the cabin roof can be used effectively, and the degree of freedom in design is improved. Is possible. Since air can be taken in from the entire cabin roof, a large intake area can be configured. Further, since the blower motor is provided near the inside / outside air switching duct, the distance from the blower motor to the outside air inlet and the inside air inlet of the inside / outside air switching duct can be shortened, and the resistance during intake can be reduced. Therefore, the intake efficiency by the blower motor can be improved, the energy required for the air conditioner can be reduced, and the load on the engine can be reduced. Further, the space required for the inside / outside air switching duct and the blower motor can be reduced, and the space in the cabin roof can be used effectively. Thereby, the degree of freedom in designing the duct mechanism can be improved.

According to a third aspect of the present invention, in a cabin of a work vehicle that covers a driving unit of an airframe, a side window that can be opened and closed is provided at a rear portion of the cabin of the work vehicle, and the work vehicle is provided at a front portion of the side window. The door window that can be opened and closed is provided on the side of the cabin, and the hinge of the door window that also serves as the hinge of the side window is provided, so that the number of components can be reduced, and the member that supports the door support stay and the side window support stay The space occupied by the door support stays and the side window support stays in the center pillar can be reduced, so that the external space can be reduced. Can be improved.
Further, the number of screw holes for screwing and fixing members supporting the door support stay and the side window support stay provided on the center pillar can be reduced, so that the number of manufacturing steps can be reduced, and the strength of the center pillar can be reduced. Can also be improved. Further, with the above configuration, the rear portion of the side window can be opened, so that the driver can open the side window and improve the visibility for viewing the working machine mounted on the rear portion of the work vehicle. is there. Since the front portion of the door window opens, and the above-described side window can open rearward, by opening the door window and the side window, outside air is introduced from a gap where the door window is opened, and the side window is opened. By discharging from the opened gap, it is possible to naturally generate a flow of wind in the cabin,
It is possible to improve the driver's comfort.

According to a fourth aspect of the present invention, in a cabin of a work vehicle that covers a driving unit of an airframe, a front window is provided at a front portion of the cabin of the work vehicle, and a front lower window is provided at a left and right lower portion of the front portion of the cabin. A window is provided, and the joint frame between the front window and the front lower window of the cabin is disposed on a straight line connecting the driver's line of sight and the front axle case, so that the blind spot by the joint frame and the blind spot by the front axle overlap, The blind spot at the bottom can be reduced. As a result, the visibility near the front wheels is improved, the visibility of the ground in front is improved, and the driver can visually check the ground conditions,
Work can be performed, and workability can be improved. In addition, since the front window has a shape in which the lower end extends downward, the sound insulating effect of the front window can be improved.

[Brief description of the drawings]

FIG. 1 is an overall side view showing a tractor equipped with a cabin of the present invention.

FIG. 2 is a front view showing a configuration of a front window and a lower glass.

FIG. 3 is a plan view showing an air duct.

FIG. 4 is a side view showing a cabin roof equipped with an air conditioner.

FIG. 5 is a side view showing a side air duct.

FIG. 6 is a plan view showing a side air duct.

FIG. 7 is a front sectional view of a side air duct.

FIG. 8 is a side sectional view showing a front duct.

FIG. 9 is a side view showing the inside / outside air switching duct.

FIG. 10 is a rear view showing an outside air introduction portion of the cabin roof.

FIG. 11 is a side view showing a door hinge.

FIG. 12 is a partial plan sectional view of the same.

FIG. 13 is a side view showing a fender.

FIG. 14 is a plan view of the same.

[Explanation of symbols]

 Reference Signs List 11 Cabin roof 24 Seam full frame 27 Front axle 31 Inside / outside air switching duct 35 Front duct 36 Side duct 81 Door hinge

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B62D 25/06 B60J 1/02 K 33/06 B62D 33/06 A

Claims (4)

[Claims] An air conditioner is provided above a cabin in a cabin of a work vehicle that covers a driving unit of an airframe, and a blow-out duct of the air conditioner is formed such that a substantially central portion of the cabin is blown out in a side view. The vicinity of the front window is configured to be a defroster blowout, a cooling and heating distribution plate is provided at a substantially central portion in the vertical direction of the duct, so that a cold wind is blown to the driver's head, and a warm wind is blown to the feet. A cabin of a work vehicle, wherein a wind is configured to be distributable. 2. A cabin of a working vehicle that covers a driving unit of an airframe, an air conditioner is provided above the cabin, and a part of a hollow roof is formed of a permeable member, thereby introducing inside and outside air of the air conditioner. A cabin for a working vehicle, wherein the cabin is formed in a duct, and a blower motor is arranged near the inside / outside air switching duct. 3. A cabin of a work vehicle that covers a driving unit of an airframe, a side window that can be opened and closed is provided at a rear portion of the cabin of the work vehicle, and a front portion of the side window is provided on a side of the cabin of the work vehicle. A cabin for a working vehicle, comprising a door window that can be opened and closed, and a door window hinge that also serves as a side window hinge. 4. A cabin of a work vehicle that covers a driving unit of an airframe, a front window is provided at a front portion of the cabin of the work vehicle, and a front lower window is provided at lower left and right sides of the front portion of the cabin. A cabin for a working vehicle, wherein a seam frame between a front window and a front lower window is disposed on a straight line connecting a driver's eyes and a front axle case.