JP2006008075A - Cabin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cabin for which an internal air circulation duct for introducing the internal air to an air-conditioner main body does not become an obstacle for the arranging space for the air-conditioner main body. <P>SOLUTION: An air-conditioner main body housing chamber 59 which houses the air-conditioner main body 60 under a driver's seat 44 which is arranged in the rear section of this cabin 9 is formed into a sealed state. A wall section 57a constituting the air-conditioner main body housing chamber 59 is provided with an internal air intake section 61 which takes air in the cabin 9 chamber into the air-conditioner main body housing chamber 59 through a filter 63. Also, an internal air introducing port 65 which introduces air in the air-conditioner main body housing chamber 59 to the air-conditioner main body 60 is provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cabin mounted on a vehicle such as a tractor.

Conventionally, a tractor has been provided with an air conditioner that adjusts the air in the cabin of the cabin mounted on the tractor. If an air conditioner body equipped with an evaporator and a blower of this air conditioner is placed in the roof of the cabin, the roof becomes large. Therefore, there is a tractor in which the air conditioner main body is arranged below the floor seat below the driver's seat (see Patent Document 1).
JP-A-11-91636

In the case where the air conditioner main body is disposed below the floor seat below the driver's seat, when introducing air (inside air) into the cabin interior to the air conditioner body, a filter is provided in the cabin interior, and the floor from the filter is provided. If a duct that passes through the seat and is connected to the air conditioner main body is disposed, the space for the air conditioner main body is narrowed by the duct, and the degree of freedom in designing the arrangement of the air conditioner main body is reduced. There is.
In particular, when an inside air introduction port is provided on the back side of the air conditioner body, the duct connected to the inside air introduction port becomes an obstacle and the air conditioner body cannot be brought to the very back of the cabin, thereby reducing the operator's foot space. There's a problem.

  Therefore, an object of the present invention is to solve the above problems.

The technical means of the present invention for solving this technical problem is that an air conditioner main body accommodating chamber for accommodating an air conditioner main body is formed in a sealed manner on the lower side of a driver seat arranged at the rear of the cabin, and this air conditioner main body is accommodated. The interior of the air conditioner main body is provided with an air intake section for introducing the air in the cabin into the air conditioner main body accommodation chamber through a filter, and the air conditioner main body is provided with an internal air introduction port for introducing the air in the air conditioner main body accommodation chamber. And
Further, an outside air intake portion is provided on the roof of the cabin and a pillar constituting the cabin skeleton is formed in a hollow shape so that air outside the cabin chamber taken in from the outside air intake portion is guided downward through the pillar, It is preferable to connect the other end side of the outside air circulation duct whose one end side is connected to the lower end side of the pillar to the air conditioner body through the wall portion constituting the air conditioner body accommodation chamber.

In addition, an outside air introduction port that communicates with the other end of the outside air circulation duct is provided near the inside air introduction port of the air conditioner body, and an outside air introduction state and an outside air introduction port that closes the inside air introduction port and introduces outside air are installed in the air conditioner body. You may provide the switching damper which switches to the inside air introduction state which closes and introduces inside air.
Further, it is preferable to provide an inside air introduction port on the back side of the air conditioner body and provide an outside air introduction port on a side portion of the air conditioner body adjacent to the inside air introduction port.

  According to the present invention, the air conditioner main body accommodating chamber for accommodating the air conditioner main body is formed in a hermetically sealed manner, and the air in the cabin room is taken into the air conditioner main body accommodating chamber through the filter in the wall portion constituting the air conditioner main body accommodating chamber. Since the inside air intake section is provided and air in the air conditioner body accommodation chamber is introduced into the air conditioner body, and the air conditioner body accommodation room is a duct for introducing the inside air into the air conditioner body, the degree of freedom of the arrangement position of the inside air intake section is large. Also, the inside air circulation duct for introducing inside air into the air conditioner body does not interfere with the air conditioner body arrangement space.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a tractor (vehicle), which has a vehicle body 1 formed by connecting an engine 2 and a transmission case 3 including a flywheel housing, a clutch housing, a transmission case, and the like. The front part is supported by a pair of left and right front wheels 6, the rear part is supported by a pair of left and right rear wheels 7, and a cabin 9 is mounted on the rear part of the vehicle body 1.
The engine 2, the radiator 4, the battery 10, etc. are arranged at the front part of the tractor and are covered with a bonnet 5.

This tractor is equipped with an air conditioner (air conditioner) that adjusts the air in the cabin 9, and this air conditioner includes a cooling device and a heating device.
The cooling device is, for example, a compressor that compresses the refrigerant, a condenser (heat radiator) that condenses and liquefies the refrigerant compressed by the compressor, and a state in which the refrigerant liquefied by the condenser is decompressed and easily vaporized. And an evaporator (evaporator) that evaporates the refrigerant and removes heat from the surroundings to bring the surroundings into a low-temperature state.
As the heating device, for example, a structure in which the heating medium heated by the heat of the engine 2 is sent to the heater and the heating medium is circulated so as to return from the heater to the engine 2 side is employed.

The air conditioner main body 60 of this air conditioner has an evaporator, a heater, a blower (blower) and the like housed in a casing and is disposed in the cabin 9, and a compressor, a radiator, an expansion valve, etc. are disposed in the hood 5. Are arranged.
In addition, the air conditioner main body 60 should just be provided with the evaporator and air blower of a cooling device at the minimum.
1 to 8, the cabin 9 has a cabin frame 11 serving as a skeleton. The cabin frame 11 includes a pair of left and right front pillars 12 disposed at a front portion and a pair of left and right rear pillars disposed at a rear portion. 13, the upper ends of the left and right rear pillars 13 are set to the same height as the left and right front pillars 12, and the lower ends of the left and right rear pillars 13 are located at positions corresponding to the middle portions of the left and right front pillars 12 in the vertical direction. Further, the left and right rear pillars 13 are located in front of the upper rear surface of the cabin 9.

Further, the front pillar 12 and the rear pillar 13 have a hollow structure in which upper and lower ends are opened, and the rear pillar 13 is formed by overlapping a pair of constituent members in the left and right direction formed by sheet metal. It is formed thicker than 12.
The left and right front pillars 12 are curved so as to move outward in the left-right direction from the upper and lower ends toward the center in the vertical direction, and are formed in a curved shape that protrudes outward in the left-right direction.
Each of the left and right front pillars 12 is curved to be inclined rearward so that the upper side from the center in the up-down direction gradually goes rearward as it goes to the upper end.

Each of the left and right rear pillars 13 is formed in a curved shape corresponding to the upper half of the front pillar 12 so as to go outward in the left-right direction from the upper end to the lower end.
The upper ends of the left and right front pillars 12 are connected by a front roof beam 15, the upper ends of the left and right rear pillars 13 are connected by a rear roof beam 16, and the lower ends of the left and right rear pillars 13 are connected by a rear middle beam 21. The upper ends of the front pillar 12 and the rear pillar 13 that are on the same side in the direction are connected to each other by a side roof beam 17.

The front roof beam 15 is curved so as to move upward as it goes from the left and right ends to the center in the left-right direction, and is formed in a curved shape (arc shape) that protrudes upward. For example, when the front loader bucket attached to the front part is raised, the front diagonally upward visibility is improved, and the loader operation is easy.
Further, since the front pillar 12 is curved so as to be inclined rearward so that the upper side gradually goes to the upper end, the front roof beam 15 is located rearward as compared with the conventional structure. Is configured to have good visibility.

The rear roof beam 16 and the rear middle beam 21 are formed in a U-shape in plan view in which a middle portion is formed in the left-right direction and both left and right sides are extended forward, and the left-right direction portion is It is formed in a curved shape so as to move backward as it goes from the left and right ends to the center in the left-right direction, and convex backward.
The side roof beam 17 is curved so as to move outward in the left-right direction as it goes from the front and rear ends toward the center in the front-rear direction, and is curved so as to protrude outward in the left-right direction.

A pair of left and right upper and lower pillars 25 located on the inner side in the left-right direction with respect to the side surface of the cabin 9 are arranged on the upper rear surface of the cabin 9 (between the rear roof beam 16 and the rear middle beam 21). The rear pillar 25 is arranged in an inclined shape that moves backward as it goes downward. The upper rear pillar 25 has an upper end connected to the rear roof beam 16 and a lower end connected to the rear middle beam 21.
In addition, a pair of left and right lower back pillars 27 positioned on the inner side in the left and right direction with respect to the side surface of the cabin 9 are disposed on the lower side rear face of the cabin 9, and the lower back pillar 27 moves forward as it goes downward. The lower rear pillar 27 is arranged in an inclined manner, and the upper end side of the lower back pillar 27 is connected to the rear middle beam 21, and the lower end is substantially at the same height as the lower end of the front pillar 12.

A front panel 23 that partitions the cabin 9 from the outside (becomes a partition wall that separates the cabin 9 from the engine 2 side) is disposed at the center in the left-right direction at the lower front side of the cabin frame 11. A front floor beam 24 is disposed between the lower end side of the left and right side portions of the panel 23 and the lower end side of the left and right front pillars 12, and the inner side of the front floor beam 24 in the left and right direction is a side portion of the front panel 23. The left and right direction outer end side is connected to the lower end side and is connected to the lower end side of the front pillar 12.
The left and right side upper portions of the front panel 23 and the left and right front pillars 12 are connected to each other by a connecting frame 18.

A pair of left and right side floor beams 28 arranged in the front-rear direction are arranged on the bottom side of the cabin 9, and the left and right side floor beams 28 are located on the inner side in the left-right direction with respect to the side surface of the cabin 9. The front end side of each side floor beam 28 is connected to the middle part of the front floor beam 24 on the same side in the left-right direction, and the rear end side of the side floor beam 28 is on the same side in the left-right direction. The lower back pillar 27 is connected to the lower end side.
The front end side of each of the left and right side floor beams 28 is attached and supported to a bracket 48 provided on the front side of the transmission case 3 via a mount rubber (anti-vibration rubber) 47, and below the left and right lower back pillars 27. The fixed bracket 51 is mounted and supported via a mount rubber 49 on a support base 50 that is mounted and fixed to a rear axle case that supports the rear axle, whereby the cabin 9 is supported by the tractor vehicle body 1.

Further, the cabin frame 11 includes a side frame 22 extending from the lower end side of each of the left and right rear pillars 13 toward the front lower side to the bottom of the cabin 9. The side frame 22 faces the front upper side substantially along the rear wheel 7. The rear end side (upper end side) is connected to the lower end side of the rear pillar 13 and the front end side (lower end side) is connected to the lower end side of the front pillar 12 via a connecting member 22b and the like. The
The side frame 22 is formed in a curved shape that moves outward in the left-right direction as it goes from the front-rear end to the center in the front-rear direction, and is formed in a curved shape that protrudes outward in the left-right direction in plan view. Yes.

  A roof 39 is provided on the upper part of the cabin frame 11, a windshield 34 is provided between the left and right front pillars 12, and the entrance / exit is between the front pillar 12 and the rear pillar 13 on the same side in the left / right direction. A door 35 is provided between the front pillar 12 and the rear pillar 13, and a rear side glass 36 is provided between the rear pillar 13 and the upper and lower pillars 25 on the same side in the left and right direction. A rear glass 37 is provided therebetween, a floor sheet 31 is provided at the bottom and lower back of the cabin frame 11, and a side panel 32 is provided at the rear rear of the cabin frame 11.

The roof 39 is formed in a hollow shape from an inner roof 40 disposed on the cabin 9 indoor side and constituting a ceiling portion in the cabin 9 interior, and an outer roof 41 disposed on the upper side of the inner roof 40. An outside air intake portion 53 that protrudes outward is provided at the left and right sides of the roof 39, in the present embodiment, at the rear portion of the left side portion. The outside air intake portion 53 is connected to the cabin 9 from an outside air intake port 54 provided on the lower surface thereof. Outdoor air (outside air) is configured to be taken into the hollow portion 42 in the roof 39 through the filter 55.
Further, the upper end opening of the left rear pillar 13 is communicated with the inside of the roof 39, and the outside air taken into the roof 39 from the outside air intake 53 is guided downward through the rear pillar 13. The rear pillar 13 is used as a duct.

  The left and right doors 35 are formed in a curved shape that protrudes outward in the left-right direction in accordance with the curved shape of the side roof beam 17, the side frame 22, the front pillar 12, and the rear pillar 13, and the rear side glass 36 and the rear glass 37. Also, the rear roof beam 16 and the rear middle beam 21 are formed in a curved shape in accordance with the curved shape, thereby effectively widening the living space in the cabin 9 and improving maneuverability and operation of various devices. Good quality. In addition, since the cabin 9 is enlarged as a whole, there is no problem such that the air conditioner becomes less effective and becomes larger.

  Each of the left and right side panels 32 is formed of a plate material, and is formed in a straight line along the side floor beam 28 and from the rear end side of the side floor beam 28 to the portion corresponding to the position of the lower end of the side frame 22. A lower edge portion, a rear edge portion formed linearly along the lower back pillar 27 and from the lower end side to the upper end side of the lower back pillar 27, and from the lower edge front end to the rear edge upper end. And a side wall 22 and an arcuate edge formed in a substantially arc shape along the side of the rear middle beam 21, and a substantially fan-shaped main wall portion in a side view, and the side frame 22 from the arcuate edge portion of the main wall portion. And an extending wall portion extending outward in the left-right direction toward the side portion of the rear middle beam 21, and a lower edge portion of the main wall portion is fixed to the side floor beam 28 by welding or the like, The trailing edge of the wall portion is fixed by welding or the like under the rear pillar 27 are fixed by welding or the like extending wall portion to the side frame 22 and the rear middle beam 21 side or the like.

A rear wheel fender is provided on the outer surface side of the side panel 32 in the left-right direction.
The floor sheet 31 includes a bottom wall portion 31a that constitutes the bottom portion of the cabin 9, and a back wall 31b that extends in an inclined direction that moves upward from the rear end edge of the bottom wall portion 31a toward the rear.
The bottom wall portion 31a of the floor seat 31 is formed so that its front-rear direction extends from the lower ends of the front pillar 12 and the front panel 23 to the lower end of the lower back pillar 27 (the rear end of the side floor beam 28). Is formed so that the rear side extends between the left and right side floor beams 28 (side panels 32), and the front side extends from the left and right side floor beams 28 outward in the left-right direction to reach the lower end of the entrance. ing.

The back wall 31b of the floor seat 31 is formed to have a width extending between the left and right lower back pillars 27 and extends obliquely upward along the lower back pillar 27 from the rear end of the side floor beam 28. An opening 64 that is formed so as to reach the middle beam 21 and is closed by a glass panel is formed in the upper portion of the back wall 31 b of the floor sheet 31.
The left and right lower back pillars 27 are connected to each other by a connecting frame 56 below the opening 64.
A cabin chamber 43 is formed by the front glass 34, the roof 39, the door 35, the rear side glass 36, the rear glass 37, the floor sheet 31, the side panel 32, the front panel 23, and the like.

At the rear of the cabin 9 interior, there is an upper wall 57a that is vertically spaced from the floor seat 31, and a front wall 57b that extends downward from the front edge of the upper wall portion 57a to the floor seat 31. Is provided.
The left and right side edges of the seat base 57 are fixed to the side panel 32 by welding or the like, the rear edge of the upper wall portion 57a is fixed to the back wall 31b of the floor seat 31 by welding or the like, and the lower edge of the front wall portion is welded. It is fixed to the floor sheet 31 by, for example.
In the present embodiment, the floor seat 31, the left and right side panels 32, and the seat base 57 form an air conditioner body housing chamber 59 for housing the air conditioner body 60 of the air conditioner.

Further, a driver's seat 44 is supported on the upper surface side of the upper wall portion 57a of the seat base 57 via a cushion device, a front / rear position adjusting device, and the like, and an air conditioner main body chamber 59 is provided below the driver's seat 44. It has been.
A steering handle 45 is provided in front of the driver's seat 44, and the steering handle 45 is supported by a handle post 88 fixed to the front panel 23. The front panel 23 includes a clutch pedal and a pair of left and right. A brake pedal is supported.

A wall portion constituting the air conditioner main body accommodation chamber 59, in the present embodiment, on the rear side on the left side of the upper wall portion 57 a of the seat base 57 (the rear left side of the driver's seat 44), is provided inside the cabin 9 through the filter 63. An inside air intake portion 61 is provided for taking in air (inside air) into the air conditioner main body accommodation chamber 59.
The inside air intake portion 61 is configured so that a filter 63 covers the inside of the inside air intake port 62 formed through the left rear portion of the upper wall portion 57a of the seat base 57.
In addition, on the rear left side (right and left sides) of the air conditioner body 60, an inside air introduction port 65 for introducing the air in the air conditioner body housing chamber 59 into the air conditioner body 60 is provided. The inside air taken into the air conditioner main body chamber 59 through the filter 63 is sucked into the air conditioner main body 60 from the inside air introduction port 65.

Therefore, the entire air conditioner main body accommodating chamber 59 is a duct that guides the inside air that has passed through the filter 63 to the air conditioner main body 60, and the inside air intake portion 61 that includes the filter 63 is a wall that constitutes the air conditioner main body accommodating chamber 59. It is configured so that it may be provided at any position in the cabin facing the cabin 9 (the degree of freedom in designing the arrangement position of the inside air intake portion 61 is great).
Further, since the entire air conditioner body accommodation chamber 59 is a duct, there is no need for a space for connecting the duct or a space for arranging a filter on the rear side of the inside air inlet 65 formed on the back surface of the air conditioner body 60. As much as possible, it can be brought close to the back surface side of the cabin 9, whereby a space on the front side of the bottom wall portion 31 a of the floor sheet 31 (step, operator footrest space) can be widened.

On the inner surface side (inside the cabin 9) of the left side panel 32, there is provided an outside air circulation duct 68 whose upper end side is connected to the lower end side (inner side surface) of the left rear pillar 13 (connected to the left rear pillar 13). It has been.
The lower end side of the outside air circulation duct 68 is inserted into the air conditioner main body accommodation chamber 59 through the wall portion constituting the air conditioner main body 60, in this embodiment, the left side portion of the upper wall portion 57a of the seat base 57. The outside air that is connected to the connection port on the left side on the upper surface side of the air conditioner main body 60 from above and that is taken in through the filter from the outside air intake portion 53 of the roof 39 by the blower of the air conditioner main body 60 flows through the left rear pillar 13 and the outside air flow. It is configured to be sucked into the air conditioner main body 60 through the duct 68.

The outside air introduction duct 68 is preferably formed as flat as possible in the left-right direction so as not to disturb the living space of the cabin 9.
In addition, an outside air introduction port 66 is provided in the vicinity of the inside air introduction port 65 in the air conditioner body 60, and this outside air introduction port 66 communicates with the lower end side opening of the outside air circulation duct 68. In the present embodiment, the outside air introduction port 66 is disposed so as to be adjacent to the left side of the inside air introduction port 65 and is formed to be open toward the right side.
In addition, between the inside air introduction port 65 and the outside air introduction port 66 in the air conditioner main body 60, the inside air introduction state where the inside air introduction port 65 is closed and outside air is introduced, and the inside air where the outside air introduction port 66 is blocked and the inside air is introduced. A switching damper 70 for switching to the introduction state is provided.

The switching damper 70 is swingably supported around a vertical support shaft 69 located on the left side of the inside air introduction port 65 and behind the outside air introduction port 66, and is swung around the support shaft 69. Thus, it is possible to switch between an outside air introduction state and an inside air introduction state.
A pair of left and right outlets 67A and 67B for sending conditioned air from the air conditioner main body 60 are provided on the right side of the front surface side of the air conditioner main body 60. The air outlets 67A and 67B are sent from the air conditioner main body 60, respectively. Left and right delivery side ducts 73 and 74 for guiding conditioned air are connected, and one (right side) delivery side duct (first delivery side duct) 73 is conditioned air near the steering handle 45 via a relay duct 77. The other side (left side) delivery side duct (second delivery side duct) 74 is connected to a defroster duct 82 that blows conditioned air toward the inner surface side of the windshield 34. Has been.

The pair of outlets 67A and 67B face an inclination direction that shifts to the left as going forward, and the rear end sides of the left and right delivery side ducts 73 and 74 are connected to the front wall 57b of the seat base 57. An opening 89 is formed to be inserted into the air conditioner main body 60 and connected to the outlets 67A and 67B. The opening 89 is closed in a sealed manner by a lid.
The left and right delivery-side ducts 73 and 74 extend forward along the bottom wall portion 31a of the floor sheet 31 (the bottom portion of the cabin 9), and the rear portion shifts to the left as going forward. It is formed in an inclined shape, and the front portion is located on the center side in the left-right direction and is formed in a direction along the front-rear direction.

The front part of one delivery side duct 73 is formed in an inclined shape that moves upward along the shape of the center part on the front end side in the left-right direction of the bottom wall part 31a of the floor sheet 31, and the front end part is made of conditioned air. The connection port 73a is an outlet, and the connection port 73a is directed forward and passes through a lower duct insertion port 72 formed in the lower portion of the front panel 23.
Further, a concave portion 91 formed by denting the floor sheet 31 downward from above is formed on the center side in the left-right direction of the front portion of the bottom wall portion 31a of the floor sheet 31, and left and right delivery-side ducts 73, 74 is bent so as to protrude downward so as to be accommodated in the recess 91, and the delivery side ducts 73 and 74 are configured not to largely protrude upward from the upper surface (step upper surface) of the floor sheet 31. Has been.

The recess 91 may be formed so that the delivery side ducts 73 and 74 are completely immersed in the recess 91. A floor mat made of rubber or the like is laid on the front of the bottom wall portion 31a of the floor sheet 31.
The blowout-side main duct 76 includes a pair of left and right first duct portions 76a, a pair of left and right second duct portions 76b, and a connection port 76c that serves as an inlet for conditioned air.
The connection port 76c of the blow-out side main duct 76 is located above the base portion of the handle post 88, is directed to the front side, and is connected to the upper duct insertion port 71 formed on the upper side of the front panel 23. It is inserted.

The left and right first duct portions 76a extend outward in the left-right direction from the connection port 76c side and outward in the left-right direction toward the extension side end portion (end portion on the outer side in the left-right direction). A blow-out port 80 is provided in the direction of shifting to the above.
The second duct portion 76b extends from the connection port 76c side to the rear side through the side of the handle post 88, and moves to the extension side end portion (rear end side) toward the rear as it goes upward. It has a blowout port 79 facing in the direction.
Each of the outlets 79 and 80 is provided with a wind direction changing member that changes the wind direction.

The relay duct 77 is formed in a cylindrical shape having connection ports 77a and 77b in the upper and lower portions, is arranged on the front side of the front panel 23, and is detachably attached and fixed to the front panel 23 with screws or the like.
The upper and lower connection ports 77a and 77b of the relay duct 77 are bent so as to face rearward, and the upper connection port 77a of the relay duct 77 is connected to the connection port 76c of the blow-out side main duct 76 and is The connection port 77 b is connected to the front connection port 73 a of the one delivery side duct 73, and connects the connection port 76 c of the outlet side main duct 76 and the front connection port 73 a of the one delivery side duct 73. .

  When the relay duct 77 is provided in the cabin 9, the space in the cabin 9 is taken by the relay duct 77 and the cabin 9 space is reduced. However, as in the present embodiment, the connection port 76c of the outlet side main duct 76 is provided. And the front connection port 73a of one delivery-side duct 73 are communicated by a relay duct 77 located outside the cabin 9 room of the front panel 23, so that the space in the cabin 9 room is not narrowed. There is an advantage that the degree of freedom in designing the members provided on the cabin 9 indoor side of the front panel 23 in the cabin 9 is large.

If the relay duct 77 is provided in the cabin 9, the structure of the relay duct 77 may be complicated due to restrictions imposed by members on the cabin 9 interior side. If the relay duct 77 is bent into a complicated shape, the air Although there is a problem that the resistance is increased, in this embodiment, the duct structure can be simplified and the air resistance can be reduced.
Further, since the relay duct 77 is detachably attached from the outside of the cabin 9, the relay duct 77 can be easily connected and the inside of the relay duct 77 can be easily cleaned.
The relay duct 77 does not necessarily have a cylindrical shape, and is formed so that the connection port 76c of the outlet side main duct 76 communicates with the front connection port 73a of the one delivery side duct 73. For example, it may be constituted by a cover body that covers the connection port 76c of the blowout side main duct 76 and the front side connection port 73a of one delivery side duct 73 (in this case, the front panel 23 is also a duct). Part of).

The defroster duct 82 is formed in a gate shape along the outer shape of the front panel 23 from a pair of left and right side portions 83 and an upper portion 84 connecting the upper ends of the left and right side portions 83, and is attached to the front panel 23. The lower end side of the right side portion 83 is closed, and the front end side of the other delivery side duct 74 is connected to the lower end side of the left side portion 83.
The left and right side portions 83 of the defroster duct 82 are provided with outlets 85 that are directed outward in the left-right direction, and the upper portions 84 are provided with outlets 85 that are directed upward. Air is blown out from each outlet 85 to the inner surface side of the windshield 34.

By attaching and fixing the defroster duct 82 to the front panel 23, the rigidity of the front panel 23 can be increased by utilizing the strength of the defroster duct 82.
The defroster duct 82 is provided with an instrument panel 87 that covers the base side of the handle post 88 that supports the steering handle 45, the blowout main duct 76, and the like and is attached with an instrument panel and the like. 82 also serves as a mounting member for the instrument panel 87, and is configured such that the mounting member for the instrument panel 87 can be omitted.

  In the cabin 9 having the above-described configuration, when the outside air introduction port 66 is closed by the switching damper 70 and the inside air is circulated, the air conditioner blown from the blowout ports 79, 80, and 85 of the blowout side main duct 76 and the defroster duct 82. The air smoothly flows rearward along the curved door 35 and the rear side glass 36 and flows along the inner surface of the inner roof 40 to reach the inside air intake 61 at the rear of the cabin 9. 59 is sucked into the air conditioner main body 60 through the outlets 67A and 67B of the air conditioner main body 60 to the outlet side main duct 76 and the defroster duct 82 through the outlet side ducts 73 and 74, and the outlets 79, 80, It is comprised so that it may blow out from 85, and internal air circulation is performed efficiently.

It is a side view of a tractor. It is a perspective view of a cabin. It is a front view of a cabin. It is a top view of a cabin. It is a right view of a cabin. It is a left view of a cabin. It is a rear view of the front lower center side of a cabin. It is the perspective view which looked at the front lower center side of the cabin from the cabin room. It is a plane sectional view of an air-conditioner body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 9 Cabin 13 Rear pillar 39 Roof 44 Driver's seat 53 Outside air intake part 57a Wall part 59 Air-conditioner main body accommodating chamber 60 Air-conditioner main body 61 Inside air intake part 63 Filter 65 Inside air introduction port 66 Outside air introduction port 68 Outside air distribution duct 70 Switching damper

Claims (4)

An air conditioner main body accommodating chamber (59) for accommodating the air conditioner main body (60) is formed in a sealed state below the driver seat (44) disposed at the rear of the cabin (9). An air intake section (61) for taking in the air in the cabin (9) through the filter (63) into the air conditioner main body accommodating chamber (59) is provided on the wall (57a) constituting the air conditioner main body (60). A cabin provided with an inside air introduction port (65) through which air in the main body accommodation chamber (59) is introduced. The roof (39) of the cabin (9) is provided with an outside air intake portion (53) and the pillar (13) constituting the skeleton of the cabin (9) is formed in a hollow shape and is taken from the outside air intake portion (53). The air outside the cabin (9) is guided downward through the pillar (13), and the other end of the outside air circulation duct (68) connected at one end to the lower end of the pillar (13) is connected to the air conditioner main body accommodating chamber. The cabin according to claim 1, wherein the cabin (59a) is connected to the air conditioner body (60) through the wall (57a). An outside air introduction port (66) communicating with the other end of the outside air circulation duct (68) is provided in the vicinity of the inside air introduction port (65) of the air conditioner body (60), and the inside air introduction port (65) is provided in the air conditioner body (60). A switching damper (70) is provided for switching between an outside air introduction state in which the outside air is introduced by closing the outside air introduction port and an inside air introduction state in which the outside air introduction port (66) is closed and the inside air is introduced. cabin. An inside air introduction port (65) is provided on the back side of the air conditioner body (60), and an outside air introduction port (66) is provided on a side portion of the air conditioner body (60) adjacent to the inside air introduction port (65). The cabin according to any one of claims 1 to 3.

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