JP5215215B2 - Work vehicle with cabin - Google Patents

Description

  The present invention relates to a cabin-equipped work vehicle in which an air conditioning unit is provided in a roof portion of a cabin.

As a work vehicle with a cabin as described above, a vehicle having a structure shown in the following [1] has been known.
[1] The air conditioning unit is supported by a rear cross member provided above the rear end of the cabin frame so that the rear end thereof is located behind the rear window of the cabin, and covers the lower side of the air conditioning unit. The lower cover is provided in a state of being positioned below the side cross member constituting the cabin frame on the front side of the rear cross member (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2007-308028 (paragraph numbers 0044, 0055, FIGS. 1, 2 and 8)

As described above, if the air conditioning unit is provided in a state in which the rear end portion is located behind the cabin rear window and below the side cross member, the air conditioning unit protrudes above the roof portion. There is little possibility of causing problems such as contact with other objects, which is useful in that the overall cabin height can be reduced.
However, in this structure, the part located behind the rear window is located below the side cross member, so if you want to check the rear side from inside the cabin, the field of view on the upper rear side is narrowed. There is a problem that it is.
In order to make it easier to see the rear upper side, it is conceivable that the air conditioning unit accommodating portion is provided in the cabin interior side in front of the rear window to widen the visual field behind the rear window. The ceiling side in the cabin is too low, and the driver's overhead feeling becomes strong, which is not preferable.
In addition, it is possible to eliminate these problems by increasing the overall cabin, but this tends to increase the weight of the vehicle body because the cabin frame is unnecessarily high.

  An object of the present invention is to devise the arrangement of the air-conditioning unit and the roof structure in the cabin roof part, and to ensure the cabin interior height and the wide rear visual field while avoiding an increase in the weight of the vehicle body.

[Solution 1]
The technical means of the present invention taken in order to solve the above problems is a work vehicle with a cabin in which an air conditioning unit is provided in the roof portion of the cabin,
The air conditioning unit is supported by a rear cross member provided at the upper rear end of the cabin frame so that the rear end portion is located behind the rear window of the cabin, and is disposed on the upper side of the rear cross member.
The inner roof of the roof portion is supported by a side cross member provided at the upper part of the lateral side end of the cabin frame at a height position similar to the rear cross member, and the roof portion is configured to cover the upper side of the inner roof. Forming the outer roof so that the rear end functions as an upper cover that covers the upper side of the air conditioning unit;
The vertical width from the rear cross member to the outer roof that covers the upper part of the air conditioning unit and the vertical width from the side cross member to the outer roof are set to the same vertical width, and the inner roof is connected to the outer periphery of the cabin. parts side by low, Ri tare formed into a curved surface central portion of the cabin chamber is projectingly bent upward side so that the high,
The vertical distance between the side cross member and the upwardly curved portion of the inner roof is greater than the vertical distance between the upwardly curved portion of the inner roof and the outer roof. It is configured to be large .

[Operation and effect of invention according to Solution 1]
According to the solution 1, the rear cross member and the side cross member on the upper end side of the cabin frame are set to the same height position, the air conditioning unit is arranged above the rear cross member, and the rear cross member The vertical width from the side cross member to the outer roof and the vertical width from the side cross member to the outer roof covering the upper side of the air conditioning unit are set to the same vertical width.
For this reason, the roof part is also formed on the front side with the same vertical width as the rear side with the vertical width enough to house the air conditioning unit, and the overall thickness in the vertical direction looks somewhat thicker in side view. However, on the front side, the inner roof is formed in a curved surface that curves upward so that the outer peripheral side of the cabin chamber is low and the central side of the cabin chamber is high.
Thereby, the vertical thickness on the front side of the roof portion can also be used as a part of the cabin interior space. As a result, for example, the cabin interior space can be increased with the thickness of the roof that is easier to create with a lighter member than the cabin frame support, compared to the case where the cabin frame support is raised to increase the cabin interior space. The overall weight can be reduced.

Therefore, the air conditioning unit supported above the rear cross member without increasing the vertical height of the column part of the cabin frame, which is a strong member and heavy, as much as possible, Stores using the direction width.
In addition, the inner roof shape can be devised so that the required height of the cabin interior space can be secured so that the vertical width of the roof portion that can store the air conditioning unit can also be used as part of the cabin interior space. Therefore, as described above, there is an advantage that the visual field on the upper rear side can be enlarged while avoiding an increase in cabin weight.
[Solution 2]
The invention according to Solution 2 is characterized in that an extension support member extended rearward is provided on the rear side of the rear cross member, and the air conditioning unit is supported by the extension support member.

[Solution 3 ]
The invention according to the solving means 3, the cabin compartment front side of Lee N'narufu, provided rear side is higher step portion lower front side, the forward face of the step portion, capable of forming an opening portion forming an opening for fixtures mounted There is a feature in that a planned spot is provided and a weak point portion of strength is formed in the planned opening formation spot.

[Operation and effect of invention according to Solution 3 ]
According to this solution 3 , an opening formation scheduled portion capable of forming an opening for mounting fixtures is provided on the front side of the cabin room of the inner roof, and a strength weak point portion is formed at the opening formation planned portion. Therefore, when it is necessary to attach equipment such as optional parts, the opening can be formed by a simple operation such as applying external force to the opening formation planned location, and the equipment can be easily attached. There is an advantage which becomes easy.

[Solution 4 ]
The invention according to the solving means 4, the front end of the duct for blowing air from the air conditioning unit in the front of the cabin chamber, so as to be disposed at a position overlapping the lower fixtures equipped in the step portion, the vertical width It is characterized in that it is formed in a flat cylindrical cross-sectional shape having a wider horizontal width than that.

[Operations and effects of invention according to Solution 4 ]
According to this solution 4 , the front end of the duct that blows air from the air conditioning unit to the front of the cabin is formed in a flat cylindrical shape having a horizontal width wider than the vertical width. Even if equipment is installed in the stepped portion, it can be installed in a state where it overlaps the lower side.
Accordingly, the horizontal area of the space required when the duct front end and the fixture are allowed to coexist is, for example, a structure that must be displaced between the inner roof and the outer roof of the roof part and shifted in the front-rear direction. In comparison, the area in the horizontal direction occupied by the front end of the duct and the fixtures arranged in a state where they overlap in the vertical direction can be reduced.
As described above, a relatively large vertical width is required to store the duct front end portion and fixtures, but the horizontal area of the roof portion is small, so the remaining portion of the roof portion, that is, the vertical width needs to be increased. It is possible to secure a wide horizontal area in the non-existing portion. As a result, there is an advantage that the high range of the ceiling portion in the cabin room is made as wide as possible to easily reduce the feeling of pressure.

[Solution 5 ]
The invention according to the solving means 5 forms a outer roof portion which serves as an upper cover for covering the upper side of the air conditioning unit, the accommodation space of the air conditioning unit in the lower cover for covering the lower side of the air conditioning unit, the outer roof and the lower A facing surface that sandwiches the sealing material is formed at a joint with the cover, and a connecting bolt that fastens and connects the outer roof and the lower cover is provided along one direction along the direction of movement of the facing surfaces. There is a feature in a certain point.

[Operation and effect of invention according to Solution 5 ]
That is, according to this solution 5 , the connecting bolt that fastens and connects the outer roof and the lower cover, which functions as an upper cover that covers the upper side of the air conditioning unit, is provided between the opposing surfaces of the joint portion of the outer roof and the lower cover. It is provided along one direction along the perspective movement direction.
As a result, the perspective movement direction between the opposing surfaces and the tightening direction of the connecting bolt are the same direction along one direction, and the compression direction of the seal member sandwiched between the opposing surfaces is also the same. It will be compressed in one direction.
Therefore, for example, when the lower cover is connected and fixed to the upper cover with a connecting bolt that is tightened in the vertical direction and a tightening connecting bolt that is tightened in the horizontal direction, the opposing surfaces of the joint portions of both covers are There is an advantage that it is difficult to cause a situation in which an external force in both the vertical direction and the horizontal direction is applied to the sealing material that is sandwiched between the two, and the deformation is easily damaged.

Overall side view of tractor Top view of cabin top Disassembled perspective view of the rear upper part of the cabin A perspective view of the cabin top Vertical sectional view of the roof Perspective view of inner roof part Sectional view taken along line VII-VII in FIG. VIII-VIII sectional view in FIG. Bottom view behind the roof Disassembled side view behind the roof Air perspective duct perspective view

[Overall configuration of work vehicle]
FIG. 1 shows an entire side surface of a tractor as an example of a work vehicle with a cabin. This tractor has a pair of left and right power via a traveling transmission system including a transmission (not shown) for traveling, in which the power from the engine 2 mounted on the front frame 1 is anti-vibrated. It is configured as a four-wheel drive type that transmits to the front wheel 4 and the rear wheel 5.

  At the rear part of the transmission case 3, a pair of left and right lift arms 6 that are driven to swing in the vertical direction by the operation of a hydraulic lift cylinder (not shown) installed in the upper part, and takeout of engine power to the outside. It is equipped with a power take-out shaft 7 that enables it. The power take-off shaft 7 is connected to a work transmission system including a work transmission (not shown), a work clutch (not shown), and the like, which are housed in a transmission case 3 that is separate from the traveling transmission system. The power from the engine 2 is transmitted.

  The left and right lift arms 6 are connected to a link mechanism (not shown) connected to the rear part of the transmission case 3 so as to be movable up and down. The power take-out shaft 7 is connected to the link mechanism. A transmission shaft for transmitting power to a working device (not shown) such as a device is connected.

  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 provided. .

[Cabin structure]
As shown in FIGS. 1 to 4, the cabin 11 includes a cabin frame 19, a windshield 20 made of transparent curved glass, a pair of left and right door panels 21 made of transparent flat glass, and a transparent curved surface. A pair of left and right side windows 22 of an outward opening type made of glass and the like, and an outer opening type rear window 23 made of a transparent curved glass or the like are included.

  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 cross members 28 and a rear cross member 29 having a U-shaped cross section are integrated into a frame body by welding. An inner roof 30 and an outer roof 31 are attached to the front cross member 27, the left and right side cross members 28, and the rear cross member 29 to form a roof portion 32.

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 FIGS. 1 and 4, the rear cross member 29, the pair of left and right side cross members 28, and the front cross member 27 are the same on the upper ends of the front pillar 24, the quarter pillar 25, and the rear pillar 26, respectively. It is arrange | positioned in the height position and is formed in linear form by side view.

As shown in FIGS. 3 and 4, an extension support plate 37 (corresponding to an “extension support member”) for mounting and holding the air conditioning unit 36 is welded and fixed to the rear side of the rear cross member 29. In addition, the extended support plate 37 is equipped with three support stays 37a for supporting the left and right ends of the air conditioning unit 36 and the central portion.

As shown in FIG. 5, the roof portion 32 has a vertical width L <b> 1 that can secure an arrangement space for the air conditioning unit 36 between the rear cross member 29 and the rear portion of the outer roof 31.
The inner roof 30 is joined to the lower surface of the front cross member 27, the left and right side cross members 28, and the rear cross member 29, and the inner roof 30 is provided between the peripheral portion and the outer roof 31. In order to make the living space as wide as possible while securing the space, the central portion is formed in a shape that bulges toward the outer roof 31. Accordingly, a space S corresponding to the interior of the cabin 11 is formed by the space L2 between the bulged inner surface of the central portion and the upper surfaces of the left and right side cross members 28, and the feeling of pressure on the ceiling side in the cabin 11 is reduced. For help.

  The outer roof 31 has a peripheral edge supported by the upper surfaces of the front cross member 27 and the left and right side cross members 28, and has an outside air introduction path 38 at the front and rear intermediate portions thereof, and a rear end portion thereof from the rear window 23. Also, it extends rearward and is formed to function as an upper cover that covers the upper part of the air conditioning unit 36.

  A lower cover 39 that covers the rear lower part of the air conditioning unit 36 is connected to the rear part of the outer roof 31 that extends rearward so as to cover the upper part of the air conditioning unit 36 and the extension support plate 37. As a result, the accommodation space 40 for interiorizing the air conditioning unit 36 is formed by the three of the rear end portion of the inner roof 30, the rear portion of the outer roof 31, and the lower cover 39.

As shown in FIGS. 2 to 6, an inside air supply port 41 for supplying room air in the cabin 11 to the air conditioning unit 36 is formed in the center of the rear part of the inner roof 30.
In the center of the rear part of the outer roof 31, an outside air supply port 42 that enables supply of outside air to the air conditioning unit 36 is formed in a state of facing the inside air supply port 41 of the inner roof 30. Outside air introduced from an outside air introduction port 44 formed at the left end portion of the outer roof 31 is guided to the outside air supply port 42 via an outside air introduction path 38 formed in the outer case.
Whether the supply gas to the air conditioning unit 36 is taken in from which side of the inside air supply port 41 or the outside air supply port 42 is not shown, but by using an appropriate route switching means such as a route switching shutter. It is configured to be switched.

As shown in FIGS. 6 and 7, a step portion 30 </ b> A having a low front side and a high rear side is provided at the front portion of the inner roof 30. On the front-facing surface of the stepped portion 30A, there is provided an opening formation scheduled portion 33 for facilitating the formation of an opening for attaching an audio device such as a radio cassette recorder as optional equipment 88.
In the planned opening portion 33 on the forward facing surface of the inner roof 30, the strength weak point portion 34 is configured by forming a cut in advance at a depth of about half the plate thickness of the portion to be cut out as the opening. Therefore, when an optional part is attached later by the dealer, the remaining plate thickness of the cut portion which is the strength weak point portion 34 is cut off to facilitate the formation of the opening.

As shown in FIG. 7, on the front side of the planned opening 33, an opening is formed in the planned opening 33, and equipment 88 (for example, an audio device) is inserted into the opening. At this time, a holder 75 for externally fitting and supporting the inserted equipment 88 is provided. The holder 75 includes a rectangular tubular body 76 that is externally fitted to the fixture 88, and leg portions 77 that extend from the lower part of the rectangular tubular body 76 toward the front cross member 27 on the front side of the machine body. The front end side of the leg portion 77 is welded to the front cross member 27. As a result, the holder 75 is attached and fixed in the roof portion 32 between the inner roof 30 and the outer roof 31.
Therefore, when the equipment 88 is inserted into the opening formed in the planned opening portion 33 from the indoor side of the cabin 11, the insertion end side of the equipment 88 is inserted and fitted into the rectangular tubular body 76 of the holder 75. Is done. At this time, a well-known engaging portion (not shown) that is elastically engaged is formed between the outer peripheral portion of the fitting 88 and the inner peripheral portion of the rectangular tubular body 76 of the holder 75. Thus, the equipment 88 is automatically engaged by the insertion of the equipment 88 so that the equipment 88 does not fall off.

  As shown in FIGS. 5, 6, and 8, a box-shaped bulging portion 45 that bulges upward from the left and right sides is formed at the central portion in the left-right width direction on the front side of the inner roof 30. It is. Then, an L-shaped lid member 46 is mounted on the lower surface side of the inner roof 30 facing the location where the box-shaped bulging portion 45 exists so as to swing up and down around the horizontal axis x as shown in FIG. Has been. The lid member 46 and the box-shaped bulging portion 45 form an openable / closable space having a substantially rectangular cross section, and this space constitutes an accessory storage portion 47 that can store accessories such as tools.

[Air conditioning unit]
As shown in FIGS. 4 to 6, 8, and 9, the air conditioning unit 36 includes a casing 56 in which an 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. The sirocco fan 57, the evaporator 58, the heater 59, etc. are comprised internally. The air conditioning unit 36 is supported by the support stays 37 so that the rear end of the air conditioning unit 36 is located behind the rear window 23 of the cabin 11 between the left and right rear pillars 26. It comes to be located behind.

  As described above, since the air conditioning unit 36 is arranged on the rear side of the cabin 11, the field of view on the front upper side is widened compared to the case where the air conditioning unit 36 is arranged on the front end portion of the roof portion 32. During loader work with a loader (not shown) connected, it is easy to see the raised bucket position and workability is improved.

  The sirocco fan 57 is arranged on the right side of the evaporator 58, and the unadjusted air taken in from the intake portion 54 is passed through an air supply path 61 formed between the evaporator 58 and the rear wall 60 of the casing 56 facing the evaporator 58. To the evaporator 58 and the heater 59.

  The rear wall 60 of the casing 56 has a multi-stage shape that approaches the evaporator 58 toward the left end away from the sirocco fan 57 so as to function as a guide wall that guides unadjusted air from the sirocco fan 57 substantially uniformly throughout the evaporator 58. Is formed.

  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 4, a pair of left and right air-conditioning ducts 63 that guide the adjusted air from the corresponding outlets 55 toward the front end of the cabin 11 are externally fitted to the outlets 55 of the casing 56. ing.

The left and right air-conditioning ducts 63 are made of a resin molded product formed in a substantially L shape so that their front end portions are in positions close to the front cross member 27 and are substantially along the front cross member 27.
A first air outlet 64 and a second air outlet 65 are formed in the middle part of the left and right air-conditioning ducts 63 to blow the guided regulated air toward the operator from the front side of the operator.

At the front ends of the left and right air-conditioning ducts 63, a third air outlet 66 for blowing the guided regulated air downward from the lateral end of the upper front end of the cabin 11, and the left and right middle portions of the upper end of the cabin 11. The 4th blower outlet 67 which blows off toward the downward direction is formed.
As shown in FIG. 6, blowout grills 68 to 71 that are also used as positioning members of the left and right air-conditioning ducts 63 with respect to the inner roof 30 are fitted to the blowout openings 64 to 67, respectively.

  The blow-off grills 68 and 69 provided in the first blow-out port 64 and the second blow-out port 65 are adapted to supply the adjusted air from the first blow-out port 64 or the second blow-out port 65 from the front side and the upper side of the driver. The direction can be changed to a state where the air is blown out toward the side or a state where the air is blown out toward the lower body.

  The blow-out grill 70 equipped in the third blow-out port 66 blows the regulated air from the third blow-out port 66 toward the side mirrors 72 equipped in the left and right front pillars 24 or from the front upper side of the operator. It is configured so that the direction can be changed in such a manner that it is blown out toward the feet of the pilot.

  The blowout grill 71 mounted on the fourth blowout port 67 is suitable for a state in which the adjusted air from the fourth blowout port 67 is blown out from the front view position or the front side of the pilot toward the driver's feet. It is configured to be changeable.

  As shown in FIGS. 2 and 11, in the left and right air conditioning ducts 63, the flow rate of the regulated air forward from the first air outlet 64 is reduced between the first air outlet 64 and the third air outlet 66. Thus, a first throttle 73 that secures the flow rate of the regulated air blown from the first blower outlet 64 is formed, and the second blower outlet 65 is provided between the second blower outlet 65 and the third blower outlet 66. A second throttle portion 74 that secures the flow rate of the regulated air blown out from the second outlet 65 by reducing the flow rate of the regulated air further forward is formed.

  With this configuration, the air conditioning unit 36 is arranged at the rear part of the roof portion 32 to improve the comfortability, but the adjusted air is supplied to the driver, the viewing area of the side mirror 72 in the left and right door panels 21, or the window. It becomes possible to preferentially supply to the front view area of the shield 20 and the like, thereby improving the comfort inside the cabin 11, and the front view area of the windshield 20 and the left and right The side mirror viewing area on the door panel 21 can be cleared, and the front confirmation and the rear confirmation by the side mirror 72 can be easily performed. Therefore, the maneuverability and workability can be improved.

  In particular, the first throttle part 73 is located in front of the first outlet 64 and the second throttle part 74 is located in front of the second outlet 65, so that the first outlet 64 and the second outlet 65 are separated. The control air can be blown out rearward toward the pilot.

[Lower case mounting structure]
As shown in FIG. 10, a seal material 81 is interposed between the outer roof 31 and the lower cover 39. An extension support plate 37 is fixed to the rear cross member 29, and a sealant 82 is provided between the extension support plate 37, which is a member on the rear cross member 29 side, and the lower cover 39 using the extension support plate 37. Is intervening.
By interposing the sealing materials 81 and 82 in this manner, airtightness and waterproofness of the air conditioning unit accommodation 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 ensured. Can do. Note that reference numeral 83 in FIG. 10 denotes a sealing material interposed between the outer roof 31 and the side cross member 28 and the rear cross member 29.

As shown in FIGS. 3 and 10, the lower cover 39 has a linear facing surface 39 a joined to the lower surface side of the extension support plate 37 on the front side, and a rear portion of the outer roof 31 on the rear side. A linear opposing surface 39b joined to the lower surface side and an arcuate opposing surface 39c joined to the lower surface side of the lateral side portion of the outer roof 31 at the lateral side portion are formed.
Further, a linear facing surface 37b joined to the facing surface 39a is also formed on the extended support plate 37 side, and a straight facing surface 31b and a rear side and a lateral side portion of the outer roof 31, respectively. An arcuate facing surface 31c is formed.

  Then, the lower cover 39, the extension support plate 37, and the rear portion of the outer roof 31 are tightened and connected with vertical connecting bolts 87, as shown in FIG. The connecting bolt 87 is compressed along the tightening direction. Therefore, for example, the connecting bolt 87 is tightened in the front-rear direction on the rear cross member 29 side and is tightened in the up-down direction on the outer roof 31 side. Compared with the case of deformation, it is easy to avoid a problem such that unnecessary distortion deformation is given to the sealing materials 81 and 82 to accelerate deterioration. In this embodiment, the sealing materials 81 and 82 are integrally formed.

  As shown in FIG. 2, the outer roof 31 is formed such that the lateral width of the rear end portion is wider than that of the lower cover 39, and thereby, at the lateral side portion of the lower cover 39 at the rear end portion of the outer roof 31, The outside air introduction port 44 having a dust collecting filter mounted on the suction surface is provided.

  As shown in FIG. 2, the left and right air-conditioning ducts 63 are externally fitted from the front side to the corresponding blowing portions 55 of the casing 56, and a single connecting portion 94 integrally formed at the front end portion is connected to each of the left and right air-conditioning ducts 63. By bolt connection to a single connector 95 provided on the side cross member 28, it can be fixed and held at a predetermined position in a predetermined posture.

[Other Embodiment 1]
The air conditioning unit 36 provided in the roof portion 32 is not limited to the one having a function of performing both cooling and heating, and may have a structure for performing only cooling.

[Second embodiment]
The strength weak point portion 34 is not limited to the notch formation in which the plate thickness is partially thinned, and the opening portion can be easily formed by subsequent work such as intermittently forming a through hole along the periphery of the opening. Any structure can be adopted as long as it has a structure.

  The work vehicle with a cabin of the present invention is not limited to a tractor, and may be a combine, a backhoe, a transport vehicle, or the like.

6 Lift arm 11 Cabin 19 Cabin frame 23 Rear window 29 Rear cross member 30 Inner roof 31 Outer roof 32 Roof part 33 Location where opening is to be formed 34 Strength weak point 36 Air conditioning unit
37 Extension support plate (extension support member)
39 Lower cover 63 Air-conditioning duct 81, 82 Sealing material 87 Connecting bolt 88 Equipment

Claims (5)

A work vehicle with a cabin in which an air conditioning unit is arranged on the roof of the cabin,
The air conditioning unit is supported by a rear cross member provided at the upper rear end of the cabin frame so that the rear end portion is located behind the rear window of the cabin, and is disposed on the upper side of the rear cross member.
The inner roof of the roof portion is supported by a side cross member provided at the upper part of the lateral side end of the cabin frame at a height position similar to the rear cross member, and the roof portion is configured to cover the upper side of the inner roof. Forming the outer roof so that the rear end functions as an upper cover that covers the upper side of the air conditioning unit;
The vertical width from the rear cross member to the outer roof that covers the upper part of the air conditioning unit and the vertical width from the side cross member to the outer roof are set to the same vertical width, and the inner roof is connected to the outer periphery of the cabin. parts side by low, Ri tare formed into a curved surface central portion of the cabin chamber is projectingly bent upward side so that the high,
The vertical distance between the side cross member and the upwardly curved portion of the inner roof is greater than the vertical distance between the upwardly curved portion of the inner roof and the outer roof. A work vehicle with a cabin, characterized by being configured to be large . On the rear side of the rear cross member, an extension support member extended rearward is provided,
The work vehicle with a cabin according to claim 1, wherein the air conditioning unit is supported by the extension support member . On the front side of the cabin room of the inner roof, a step portion is provided with a low front side and a high rear side, and an opening formation scheduled portion is provided on the front surface of the step portion so that an opening for mounting fixtures can be formed. The work vehicle with a cabin according to claim 1, wherein a weakened strength portion is formed at a planned formation location . A flat cylinder with a horizontal width wider than the vertical width so that the front end of the duct that blows air from the air conditioning unit to the front of the cabin can be installed on the lower side of the equipment provided in the step The work vehicle with a cabin according to claim 3, wherein the work vehicle is formed in a cross-sectional shape . A housing space for the air conditioning unit is formed by an outer roof that functions as an upper cover that covers the upper side of the air conditioning unit, and a lower cover that covers the lower side of the air conditioning unit,
An opposing surface that clamps a sealing material is formed at a joint between the outer roof and the lower cover, and a connecting bolt that tightens and connects the outer roof and the lower cover is connected in one direction along the direction of movement of the opposing surfaces. The work vehicle with a cabin according to any one of claims 1 to 4, wherein the work vehicle is provided with a cabin.

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