JP2008080871A - Drainage structure for work vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drainage structure for a work vehicle, capable of sufficiently discharging even during traveling on an inclined land, while employing a simple drainage structure. <P>SOLUTION: An air conditioning unit is provided in a roof portion projecting out from a rear pillar 26 to a rear side. In the drainage mechanism A, an instrument side draining hose is provided in a rood portion 32 while taking a posture horizontal from the air conditioning unit and extending toward a lateral side. A metallic pipe 66 connected to the instrument side draining hose 65 projected from the roof portion 32 is arranged in a slanting downward posture toward a machine body front side. A tip end side hose 67 connected to the metallic pipe 66 is disposed along the rear pillar 26 while taking a vertical posture. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a drainage structure for a work vehicle in which an air conditioning unit is provided in a roof portion of a cabin and a drainage mechanism that discharges moisture generated from the air conditioning unit to the outside of the machine.

  In order to discharge the drain water generated by the air conditioning unit as an air conditioning unit, four drain pipes are arranged on the front, rear, left and right sides of the air conditioning unit housed in the roof of the cabin. Drain water was exhausted outside the machine by turning the drain pipe along the column (see Patent Document 1).

Japanese Utility Model Publication No. 7-27215 (line 4 of the gazette, line 46 to line 3 of column 5 and FIG. 1)

As described above, the drain drain pipes are arranged before and after the air conditioning unit because the pipes are arranged through the pillars as the rear pillars or the front pillars constituting the cabin frame arranged before and after the air conditioning unit. It is intended to search, and it is considered that drain water is discharged without hindrance even if the machine body tilts back and forth when the work vehicle runs on a slope and performs work.
However, it is necessary to provide drainage drainage pipes at the front and rear, and there is a large burden in securing piping arrangement space and manufacturing work for the arrangement work.
In addition, if there are only columns on the drainage drainage pipe in the vertical orientation, the pipes can be routed only in the front and back direction, and the pipes are simply placed in the front and back direction. It was thought that drainage was not sufficient when running on sloping terrain just by laying it toward the road.

  An object of the present invention is to provide a drainage structure for a work vehicle that can discharge sufficiently even when traveling on an inclined land while adopting a drainage structure having a simple structure.

〔Constitution〕
According to a first aspect of the present invention, the air conditioning unit is provided in a roof portion that protrudes rearward from the rear pillar, and the drainage mechanism is arranged in a horizontal and lateral direction from the air conditioning unit. And a second drainage portion connected to the first drainage portion projecting from the roof portion in an obliquely downward posture toward the front side of the machine body and connected to the second drainage portion. The third drainage portion to be arranged is arranged along the rear pillar in an upright posture, and the operation and effects thereof are as follows.

[Action]
The 1st drainage part which takes out a water | moisture content from an air-conditioning unit is wired with the attitude | position which is substantially horizontal and goes to the side. With this configuration, even if the work vehicle tilts backward, the posture of the first drainage portion does not change, so the drainage function is unlikely to deteriorate.
Since the third drainage section is routed in a vertical orientation along the rear pillar, in this case, the work vehicle is tilted rearward, and the attitude of the third drainage section is also changed to the rearward tilted attitude. However, since the function of draining downward is maintained, the drainage function is rarely degraded.
The second drainage unit connecting the first drainage unit and the third drainage unit is not arranged in a posture toward the front-rear direction of the fuselage as in the conventional configuration, but is arranged in a downward oblique posture toward the front. did. As a result, even if the work vehicle is tilted rearward and the posture of the second drainage section changes, the second drainage section can maintain a downward state, so that the drainage function is unlikely to deteriorate.

  On the other hand, when the work vehicle is tilted forward, the first drainage portion is routed in a substantially horizontal and lateral orientation, so that the orientation does not change. The second drainage unit arranged in a diagonally downward posture toward the front changes to a posture close to the vertical posture by changing the posture, and the drainage function is not deteriorated. Although the 3rd drainage part arranged in the up-and-down posture changes a little to the leaning-down posture, since the downward inclined posture can be maintained, the drainage function is hardly reduced.

〔effect〕
Regardless of the forward / backward inclination of the traveling vehicle body, by providing the first connection portion that is substantially horizontal and laterally laterally and the second connection portion that is obliquely downward in order to connect to the third discharge portion that discharges in the vertical orientation. The drainage function was not deteriorated, and it was possible to avoid malfunction of the storage device due to the decline of the drainage function.

The characteristic configuration of the invention according to claim 2 is a drainage structure for a work vehicle provided with an air conditioning unit in the roof portion of the cabin and provided with a drainage mechanism for discharging moisture generated from the air conditioning unit to the outside of the machine,
The air conditioning unit is provided in a roof portion that protrudes forward from the front pillar, and the drainage mechanism is provided with a first drainage portion in the roof portion that is horizontal and laterally directed from the air conditioning unit, and A second drainage portion connected to the first drainage portion protruding from the roof portion is disposed in an obliquely downward posture toward the rear side of the machine body, and a third drainage portion connected to the second drainage portion is arranged in an upright posture. The operation and effect are as follows, which are arranged along the front pillar.

[Function and effect]
That is, the 1st drainage part which takes out a water | moisture content from an air-conditioning unit is wired with the attitude | position which goes to a horizontal direction substantially horizontal. With this configuration, even if the work vehicle is tilted forward, the posture of the first drainage portion does not change, so the drainage function is unlikely to deteriorate.
Since the third drainage section is routed in a vertical orientation along the front pillar, in this case, the work vehicle is tilted forward and the attitude of the third drainage section is also changed to the backward tilted position. However, since the function of draining downward is maintained, the drainage function is rarely degraded.

The second drainage unit connecting the first drainage unit and the third drainage unit is not arranged in a posture toward the front-rear direction of the aircraft as in the conventional configuration, but is arranged in an obliquely downward posture toward the rear. did. As a result, even if the work vehicle is tilted forward and the attitude of the second drainage section changes, the second drainage section can maintain a downward state, so that the drainage function is unlikely to deteriorate.
When the work vehicle is inclined rearward, the first drainage portion is routed in a substantially horizontal and lateral orientation, so that the orientation does not change. The second drainage unit arranged in a downward oblique posture toward the rear is switched to a posture close to the vertical posture by changing the posture, and the drainage function is not deteriorated. Although the 3rd drainage part arranged in the up-and-down posture changes a little to a back-falling posture, since it can maintain a downward inclination posture, this also rarely falls a drainage function.

〔effect〕
Regardless of the front / rear inclination of the work vehicle, by providing a first connection portion that is substantially horizontal and laterally laterally and a second connection portion that is obliquely downward in order to connect to the third discharge portion that discharges in a vertical posture. The drainage function was not deteriorated, and it was possible to avoid malfunction of the storage device due to the decline of the drainage function.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the second drainage portion is made of a metal pipe, and the metal pipe is a bracket that supports a work lamp. The function and effect are as follows.

[Function and effect]
In other words, since the second drainage part is made of metal piping, even if the second drainage part is provided in an inclined posture, the posture of the second drainage part can be maintained well, and the drainage function is reduced. In addition to being able to suppress, it is possible to share the bracket, and there is no need to provide a dedicated bracket for supporting the metal pipe.

  FIG. 1 shows an overall side view of a tractor that mainly performs tillage work as an example of a work vehicle. This tractor uses power from an engine 2 mounted on a front frame 1 for vibration isolation as a transmission for a frame. The vehicle is configured as a four-wheel drive type that transmits to a pair of left and right front wheels 4 and rear wheels 5 via a traveling transmission system including a traveling transmission (not shown) installed in the case 3.

  As shown in FIGS. 1 and 2, a pair of left and right lift arms 6, which are driven to swing up and down by the operation of a hydraulic lifting cylinder (not shown) housed in the upper portion, are disposed at the rear of the transmission case 3. And a power take-out shaft 7 that allows the engine power to be taken out to the outside.

  The power take-off shaft 7 is a work in which the power from the engine 2 is composed of a work transmission (not shown), a work clutch (not shown), etc., which are housed in a transmission case 3 separate from the traveling transmission system. It is transmitted through the transmission system.

  Although not shown, the left and right lift arms 6 are connected to a link mechanism that is connected to the rear portion of the transmission case 3 so as to be movable up and down, and the power take-out shaft 7 is connected to a rotary mechanism connected to the link mechanism. An input shaft provided in a working device such as a tillage device is connected via a transmission shaft or the like.

  As shown in FIGS. 1 and 2, a boarding operation unit 10 including a steering wheel 8 and a driver seat 9 is formed in the rear half of the tractor, and a cabin 11 covering the boarding operation unit 10 is equipped. .

  As shown in FIG. 1, the cabin 11 includes a cabin frame 19 that includes a windshield 20 made of transparent curved glass, a pair of left and right door panels 21 made of transparent flat glass, a transparent curved glass, and the like. And a pair of left and right side windows 22 of an outward opening type and an outward opening type rear window 23 made of a transparent curved glass or the like.

  The cabin frame 19 includes a pair of left and right front pillars 24 made of deformed pipes, a pair of left and right quarter pillars 25, a pair of left and right rear pillars 26 made of square pipes, a front cross member 27 having a U-shaped cross section, and a U-shaped cross section. A pair of left and right side members 28 and a rear cross member 29 having a U-shaped cross section are welded to each other, and the front cross member 27, the left and right side members 28, and the rear cross member 29 are The roof portion 32 is formed by attaching the inner roof 30 and the outer roof 31.

The left and right door panels 21 are connected to corresponding quarter pillars 25 via a pair of upper and lower hinges 33 so as to be openable and swayable.
The left and right side windows 22 are connected to corresponding rear pillars 26 via a pair of upper and lower hinges 34 so as to be openable and swingable.
The rear window 23 is connected to the rear cross member 29 through a pair of left and right hinges 35 so as to be capable of opening and closing.
The left and right rear pillars 26 are set so that the distance between them is narrower than the distance between the left and right front pillars 24 and the distance between the left and right quarter pillars 25.

  As shown in FIG. 3, the rear cross member 29 is placed and set at a height position that is lowered by a predetermined distance from the upper ends of the left and right rear pillars 26 in order to secure an arrangement space for the air conditioning unit 36 between the rear cross member 29 and the outer roof 31. In addition, three support stays 37 for supporting the air conditioning unit 36 are provided on the upper portion thereof.

  As shown in FIGS. 1 to 3, the inner roof 30 is joined to the lower surface of the front cross member 27, the left and right side members 28, and the rear cross member 29. In order to make the living space as wide as possible while securing a space for air-conditioning duct arrangement between them, the central part is formed in a shape that bulges toward the outer roof 31.

  The outer roof 31 is supported by the upper surfaces of the front cross member 27 and the left and right side members 28 at the periphery thereof, and has an outside air introduction path 38 at the front and rear intermediate portions thereof, and the rear end portion thereof is more than the rear window 23. It extends rearward and functions as an upper cover that covers the upper part of the air conditioning unit 36.

  A lower cover 39 that covers the rear lower portion of the air conditioning unit 36 is connected to the outer roof 31 and the support stay 37, and the storage space 40 of the air conditioning unit 36 is formed by the rear end portion of the inner roof 30, the rear portion of the outer roof 31, and the lower cover 39. Is formed.

As shown in FIGS. 2 to 6, a pair of left and right inside air supply ports 41 that allow supply of cabin inside air to the air conditioning unit 36 are formed in the rear center of the inner roof 30.
As shown in FIGS. 9 and 10, a pair of left and right outside air supply ports 42 that allow supply of outside air to the air conditioning unit 36 are opposed to the inside air supply ports 41 of the inner roof 30 at the center of the rear portion of the outer roof 31. It is formed with.

As shown in FIGS. 1, 9, and 10, a pair of left and right ridges 43 that prevent rainwater from entering the cabin when the left and right side windows 22 are opened are formed in the rear portion of the outer roof 31. .
The left and right saddles 43 are formed in a hollow shape communicating with the outside air introduction path 38, and the outside air introduction port 44 is formed only on the bottom wall of the left side saddle 43, and an air filter 45 is provided.
In this way, the outside air inlet 44 is formed only in the left ridge 43 and the air filter 45 is provided, so that when the air filter 45 is cleaned or replaced in the field, the left side of the vehicle body is adjacent to the ridge. If the vehicle body is stopped in such a state, the air filter 45 can be cleaned or replaced on the eaves that can easily reach the eaves 43 as soon as it gets off the eaves from the left entrance and exit.

  As shown in FIGS. 2, 9, and 10, the outside air supply port 42 is opened between the inside air supply port 41 and the outside air supply port 42 to allow the supply of outside air to the air conditioning unit 36, and the inside air supply The outside air mixing state in which the opening area of the opening 41 is reduced to suppress the supply of the cabin inside air from the inside air supply port 41, and the outside air supply port 42 is closed to prevent the outside air from being supplied to the air conditioning unit 36 and the inside air supply port A vertically swinging shutter 46 configured to be switched to an inside air circulation state in which 41 is largely opened is provided.

  As shown in FIGS. 2, 9, and 10, the shutter 46 is an electric shaft that swings up and down around a support shaft 48 that is directed to the left and right by the operation of the electric motor 47, and is a linkage shaft provided at the free end thereof. 49 is linked to the operating arm 53 of the electric motor 47 through a crank arm 51 that swings around a fulcrum pin 50 that faces in the front-rear direction and a connecting wire 52, and is returned to the inside air circulation state by a spring (not shown). It is energized.

  As shown in FIGS. 2 and 3, the air conditioning unit 36 includes a sirocco fan 57 and an evaporator in a casing 56 in which an air intake portion 54 is opened at an upper right portion and a pair of left and right pipe-shaped blowout portions 55 are formed at a front portion. 58, a heater 59, and the like, and are supported by the respective support stays 37 so that the rear end portion thereof is positioned rearwardly larger than the rear window 23 of the cabin 11 between the left and right rear pillars 26, 26. As a result, the entirety is positioned behind the driver seat 9.

  As shown in FIGS. 2 and 3, the arrangement of the air conditioning unit 36 allows the living space to be reduced while making the overall height of the cabin 11 as low as possible as compared with the case where the air conditioning unit 36 is arranged at the front end portion of the roof portion 32. It is possible to secure a large air conditioning unit 36 having a high capacity, and it is possible to equip with a large capacity air conditioning unit 36. Further, since the field of view to the front and upper side is widened, for example, a front loader (not shown) is connected and equipped. During loader work, it is easy to visually recognize the raised bucket position, and workability is improved.

  As shown in FIGS. 2 and 3, the sirocco fan 57 is arranged on the right side of the evaporator 58, and unadjusted air taken in from the intake portion 54 is transferred between the evaporator 58 and the rear wall 60 of the casing 56 facing the evaporator 58. Then, the air is supplied to the evaporator 58 and the heater 59 through the air supply path 61 formed in the above.

  As shown in FIGS. 2 and 3, the rear wall 60 of the casing 56 is separated from the sirocco fan 57 so as to function as a guide wall that guides the unadjusted air from the sirocco fan 57 substantially uniformly throughout the evaporator 58. The left end side is formed in a multi-stage shape approaching the evaporator 58.

  Thus, by forming the rear wall 60 of the casing 56 in a multistage shape, a relatively large space 62 is formed between the outer surface of the left end portion of the rear wall 60 and the rear wall surface of the roof portion 32. It will be.

  Therefore, by effectively utilizing this space, the rear wall 60 of the casing 56 is equipped with an electric motor 47 for operating the shutter, thereby forming a dedicated space for housing the electric motor 47. It is possible to avoid complication of the part shape and enlargement of the roof part 32.

  Further, since the sirocco fan 57 is disposed on the right side of the evaporator 58, the sirocco fan 57 is positioned at the right end opposite to the outside air introduction port 44 formed at the left end of the outer roof 31, thereby In the mixed state, the outside air introduced from the outside air introduction port 44 is supplied to the evaporator 58 and the heater 59 through the outside air introduction path 38 and the air supply path 61 while being preheated at the internal temperature of the cabin 11. Therefore, compared with the case where the sirocco fan 57 is disposed in the vicinity of the outside air introduction port 44, the air conditioning efficiency can be improved.

  As shown in FIGS. 2 and 3, a pair of left and right air-conditioning ducts 63 that guide the adjusted air from the corresponding blowing portions 55 toward the front end portion of the cabin 11 are externally fitted to each blowing portion 55 of the casing 56. ing.

  As shown in FIGS. 2 to 6, the evaporator 58 is provided with a drainage mechanism A for discharging condensed water generated in the case. The drainage mechanisms A are respectively provided corresponding to drainage outlets 75 and 76 for discharging condensed water formed at both left and right ends of the bottom of the evaporator 58.

  As shown in FIGS. 3 to 6, the drainage mechanism A is connected to the left and right drainage ports 75, 76, and the left and right device side drainage hoses 65, 65 as the first drainage unit in a posture that is substantially horizontal and sideways. Is provided. The left and right device side drain holes 65, 65 have base end portions 65A, 65A connected to the left and right drain ports 75, 76 positioned in the internal space of the lower cover 39, and are in a state along the bottom surface in the internal space. As shown in FIG. 7, the lower cover 39 is provided with mounting grooves 39 </ b> C and 39 </ b> C. The distal end portions of the left and right device side drain hoses 65, 65 protrude from the outlets 39D, 39D formed in the lower case 39, and extend obliquely forward and downward.

As shown in FIGS. 3 to 6, left and right elbow-shaped metal pipes 66, 66 are arranged in a diagonally downward posture toward the front lower side on the lower side of the drainage direction from the left and right equipment side drain hoses 65, 65. The 2nd drainage part is comprised.
Left and right tip hoses 67, 67 are arranged in a vertically oriented position on the lower side of the drain direction from the left and right metal pipes 66, 66, and are connected to the left and right metal pipes 66, 66, respectively.

As shown in FIGS. 3 to 6, left and right work lights 84, 84 described later are disposed above the left and right metal pipes 66, 66, respectively, and the left and right brackets 68 that support the left and right work lights 84, 84. , 68 are provided. Plate portions 68A and 68A are suspended downward from the left and right brackets 68 and 68, and left and right metal pipes 66 and 66 are integrally fixed to the lower ends of the plate portions 68A and 68A, respectively.
In the figure, 83 is a blinker.

  As shown in FIGS. 3 to 6, the left and right tip-side hoses 67, 67 externally fitted to the lower ends of the left and right metal pipes 66, 66 are joined to the outer surfaces of the corresponding left and right rear pillars 26, 26. It extends between the window 22 and the rear window 23 to the lower side of the aircraft. As shown in FIG. 12, the cross-sectional shape of the left and right tip side hoses 67, 67 is a cylindrical part, and the base end portion bonded to the rear pillars 26, 26 is attached to the mounting seats 67A, 67A having a certain lateral width. Thus, the mounting state to the rear pillars 26 and 26 is stabilized.

  That is, as shown in FIGS. 3 to 6, the drainage ports 75 and 76 are provided at both the left and right ends of the bottom of the evaporator 58, so that the dew condensation water generated in the evaporator 58 is discharged to the drainage port corresponding to the horizontal inclination of the vehicle body. 75, 76 can be guided to the outer surfaces of the left and right rear pillars 26 via the left and right drainage mechanisms A, A, and as shown in FIG. 1, the inner surfaces of the left and right rear fenders 80 from the lower ends of the left and right rear pillars 26. Can be quickly discharged outside the vehicle.

  Further, the left and right tip-side hoses 67, 67 can be made inconspicuous by passing between the side window 22 and the rear window 23, and deterioration in appearance due to the use of an external piping structure can be suppressed. .

  The waterproof seal mechanism B formed between the outer roof 31 and the lower cover 39 will be described. As shown in FIGS. 3, 7, and 8, the waterproof seal mechanism B is provided on a connection surface between the outer roof 31 and the lower cover 39, and includes a first seal member 69 disposed on the first mating surface. The second seal member 70 is disposed on the second mating surface formed on the inner side of the first mating surface, and the water replenishment space C is formed between the first seal member 69 and the second seal member 70. Is done.

  As shown in FIGS. 7 and 8, the water replenishment space C includes an outer wall portion 39 </ b> A in the lower cover 39 and an inner wall portion 39 </ b> B that branches from the outer wall portion 39 </ b> A and stands on the inner side of the outer wall portion 39 </ b> A. Between the first seal member 69 and the moisture entering the first seal member 69 is collected.

With such a configuration, water is less likely to enter the air conditioning unit storage space even during high-pressure car washing.
In addition, the water collected in the replenishment space C is discharged as follows. As shown in FIGS. 7 and 8, the water replenishment space C is formed along the first mating surface so that the bottom surface of the water replenishment space C is located at lower positions on both side ends of the water replenishment space C. And the discharge port Cc and Cc which discharge | emit out of the machine from the lower cover 39 in the lowest part corresponding to both above-mentioned both ends is provided, and it is comprised so that the water leak captured by the water replenishment space C may be discharged | emitted.

  The first seal member 69 and the second seal member 70 will be described. As shown in FIGS. 7 and 8, the first seal member 69 is provided along the peripheral edge of the lower cover 39 disposed behind the left and right rear pillars 26, 26, and is formed as a first mating surface. It is formed in a flat plate shape having a constant width along the flat surface, and is provided with a hole 69A through which a connecting fixture or the like passes at predetermined intervals.

  The second seal member 70 will be described. As shown in FIG. 1, the outer roof 31 is mainly supported by a front cross member 27 and left and right side members 28, 28 constituting the cabin 11, and a portion protruding from the rear of the rear pillar 26 is supported by a lower cover 39. ing. As shown in FIGS. 7 to 9, the second seal member 70 includes a rear seal portion 70A provided corresponding to the second mating surfaces of the outer roof 31 and the lower cover 39, the front cross member 27, the left and right And a main body seal portion 70B provided in a state extending over the mating surfaces with the side members 28, 28. That is, the second seal member 70 is an endless connection between the rear seal portion 70 </ b> A and the main body seal portion 70 </ b> B, and is mounted in a holding groove formed corresponding to the peripheral edge portion of the outer roof 31.

  As shown in FIG. 3, the rear cross member 29 is subsequently formed with a step at the upper edge, and a sealing material 82 is interposed between the rear cross member 29 and the lower cover 39 using this step. .

  By interposing the waterproof mechanism B and the sealing material 82 in this manner, the airtightness and waterproofness of the air conditioning unit storage space 40 formed by the rear end portion of the inner roof 30, the rear portion of the outer roof 31, and the lower cover 39 are improved. Can be secured.

[Another embodiment]
[1] The work vehicle may be a combine, a backhoe or a transport vehicle.
[2] The air conditioning unit 36 may be arranged on the front side of the roof portion 32.
In this case, although not shown, a configuration is adopted in which the air conditioning unit 36 is arranged so as to protrude forward from the front pillar 24. Then, as the drainage mechanism A in this case, the equipment-side drainage hose 65 as the first drainage section is provided in a posture that is horizontal and laterally directed from the air conditioning unit 36 and is connected to the equipment-side drainage hose 65. A pipe 66 made of steel is arranged in an obliquely downward posture toward the rear side of the machine body, and a front end side hose 67 is arranged along the rear pillar in a vertical posture.
[3] The first to third drainage sections may be all constituted by a drainage hose, or may be entirely constituted by a metal pipe, and are not limited to any of them.

Overall side view of tractor Plan view showing the rear of the cabin Longitudinal side view showing the air conditioning unit storage state at the rear of the cabin Rear view of cabin with drainage mechanism Left side view showing the drainage mechanism on the left side of the aircraft Right side view showing the drainage mechanism on the right side of the aircraft Plan view showing the inner surface of the lower cover Vertical side view showing the first seal member and the second seal member interposed between the lower cover and the outer roof A bottom view showing the second seal member mounted on the outer roof A longitudinal side view showing a shutter provided between the inside air supply port and the outside air supply port The block diagram which shows the crank arm etc. which drive the shutter provided between the inside air supply port and the outside air supply port Cross-sectional plan view showing the state of attachment of the hose at the tip of the drainage mechanism to the rear pillar

Explanation of symbols

11 cabin 24 front pillar 26 rear pillar 32 roof part 36 air conditioning unit 65 first drainage part (equipment side hose)
66 Second drainage section (metal piping)
67 Third drainage section (tip hose)
68 Bracket 84 Work light A Drainage mechanism

Claims (3)

A drainage structure for a work vehicle provided with an air conditioning unit in the roof portion of the cabin and provided with a drainage mechanism for discharging moisture generated from the air conditioning unit to the outside of the machine,
The air conditioning unit is provided in a roof portion that protrudes rearward from the rear pillar, and the drainage mechanism is provided with a first drainage portion in the roof portion in a horizontal and lateral orientation from the air conditioning unit, and the roof The second drainage portion connected to the first drainage portion protruding from the portion is disposed in an obliquely downward posture toward the front side of the machine body, and the third drainage portion connected to the second drainage portion is arranged in the vertical orientation in the rear pillar. The drainage structure of work vehicles that are arranged along A drainage structure for a work vehicle provided with an air conditioning unit in the roof portion of the cabin and provided with a drainage mechanism for discharging moisture generated from the air conditioning unit to the outside of the machine,
The air conditioning unit is provided in a roof portion that protrudes forward from the front pillar, and the drainage mechanism is provided with a first drainage portion in the roof portion that is horizontal and laterally directed from the air conditioning unit, and A second drainage portion connected to the first drainage portion protruding from the roof portion is disposed in an obliquely downward posture toward the rear side of the machine body, and a third drainage portion connected to the second drainage portion is arranged in an upright posture. A drainage structure for work vehicles that is arranged along the front pillar.   3. The drainage structure for a work vehicle according to claim 1, wherein the second drainage portion is constituted by a metal pipe, and the metal pipe is integrally formed on a bracket that supports a work lamp.

Images