JP2007231520A - Cab for working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cab for a working vehicle, which surely guides cooling air from air conditioning equipment to a desired place, without an increase in the cost of the manufacture of a die for an interior finishing liner. <P>SOLUTION: The cab for the working vehicle comprises: a cab body 5 which is constituted in a box shape, and in which an operator gets; an air-conditioner 6 which is provided on the upper outside of a back panel 57; a duct 7 which is formed on the indoor side of a ceiling panel 58 in such a shape as to be integral with the ceiling panel 58, which is almost equal in width to an air outlet of the air-conditioner 6, and which is extended in the longitudinal direction of the working vehicle so as to send the air, issued from the air-conditioner 6, in the forward direction of the working vehicle; and a pair of rear openings for blowoff, which are formed on both the sides of the duct along the back panel 57, and which blow the air, issued from the air-conditioner 6, along the back panel 57. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a work vehicle cab provided on a work vehicle including a work machine.

Since work vehicles such as bulldozers work on uneven ground, ROPS (Roll-Over Protective Structures) has been adopted to protect operators in the cab for work vehicles in the event of a fall. Conventionally, work vehicles By enclosing the cab with a frame called a ROPS guard, a large external force is not applied to the work vehicle cab during a fall.
However, in recent years, for the purpose of simplifying the number of parts and simplifying the structure, it has been considered to improve the rigidity of the work vehicle cab itself and protect the operator in the cab without using such a ROPS guard. Has been.

Such a work vehicle cab having improved rigidity is configured to use a member having sufficient strength as a skeleton member constituting the cab, and to ensure the strength of the entire frame body constituted by the skeleton member. .
By the way, in such a work vehicle cab having improved rigidity, air conditioning equipment such as an air conditioner is often provided in order to improve the working conditions of the operator in the cab, and such rigidity is high. Inside the work vehicle cab, it is necessary to route a duct or the like in order to send air from the air conditioning equipment to the operator.
Here, it is preferable that the cab for the work vehicle is made as compact as possible from the viewpoint of manufacturing cost, etc., and in order to circulate the cooling air from the air conditioning equipment throughout the cab room evenly while ensuring rigidity, A structure has been proposed in which a synthetic resin-molded liner is doubly attached inside the ceiling surface of the cab, and cooling air from an air conditioning facility is circulated between the liners (see, for example, Patent Document 1).
According to such a structure, since the cooling air can be widely circulated between the double liners, there arises a problem that the overhead space is reduced by arranging a dedicated duct on the ceiling surface as in the past. There is no.

US Pat. No. 6,279,978

However, the technique described in Patent Document 1 has a problem in that a dedicated mold is created for each of the double liners, and the manufacturing cost of the mold for molding increases.
In addition, the shape of the combination part of the double liner is complicated, it is difficult to ensure the sealing of the duct formed by the two liners, the cooling air from the air conditioning equipment is likely to leak, and the cooling efficiency There is a problem that can be worse.

  The objective of this invention is providing the cab for work vehicles which can guide | invade the cooling air from an air conditioning equipment to a desired location reliably, without the metal mold | die manufacturing cost for interior liners rising.

A work vehicle cab according to a first aspect of the present invention is a work vehicle cab provided in a work vehicle including a work machine,
A cab body that is configured in a box shape including a front panel, a side panel, a back panel, and a ceiling panel, on which an operator who operates the work vehicle rides,
An air conditioner provided on the upper outside of the back panel;
Air that is integrally formed with the ceiling panel on the indoor side of the ceiling panel, has substantially the same width as the air outlet of the air conditioner, extends in the front-rear direction of the work vehicle, and is blown from the air conditioner A duct for blowing air in front of the work vehicle;
A pair of rear blowing openings formed on both sides of the duct along the back panel and blowing the air blown from the air conditioner along the back panel.

A work vehicle cab according to a second invention is the first invention,
The duct is a straight duct having substantially the same air cross-section from the rear to the front.
A work vehicle cab according to a third invention is the first invention or the second invention,
The duct is formed with a front-side air blowing opening that is opened on the front end surface in the extending direction, and a ceiling-side air blowing opening that is opened on the lower surface of the intermediate portion of the duct.
The duct is covered by an interior liner provided on the cab body indoor side,
In this interior liner, three air outlets provided at positions corresponding to the front-side air outlet openings, two air outlets provided at positions corresponding to the ceiling-side air outlet openings, And two air outlets provided at positions corresponding to the rear outlet openings.

A work vehicle cab according to a fourth invention is any one of the first invention to the third invention,
The duct is composed of a sheet metal material, and is joined to the metal ceiling panel room by intermittent welding,
A contact portion between the duct and the ceiling panel is covered with a seal member.

According to the first invention, since the duct is configured to have substantially the same width as the air outlet of the air conditioner, most of the air blown from the air conditioner can be blown forward. The front of the vehicle cab can be efficiently cooled and heated, and a part of the air blown from the air conditioner can be provided on the rear panel by the rear blowing openings formed on the left and right sides of the duct. It is possible to prevent the glass window from being fogged by spraying on the glass window or the like.
Also, by integrating the duct with the cab body, the number of duct components can be reduced, and the duct can be made thinner without increasing manufacturing costs. Even in this case, the air blown from the air conditioner can be guided to a desired position in the cab without causing the upper space to become unnecessarily narrow and without causing air leakage.

According to the second aspect of the present invention, the duct blower cross-section is configured as a straight duct that is substantially equal from the rear to the front, so that there is no reduction in the blowing efficiency due to pressure loss in the duct, and the front side of the cab Air can be sent reliably.
According to the third aspect of the present invention, the front blowing opening is formed in the front end surface of the duct in the extending direction, the ceiling blowing opening is formed in the lower surface of the intermediate portion of the duct, and the interior liner is opened in each opening. By providing an air outlet according to the position, it is possible to prevent the window glass provided in front of the cab for the work vehicle from being fogged by blowing air from the air outlet in the front part. Since air can be blown to the operator, air can be blown at an appropriate position of the work vehicle cab to improve the operating environment.

  According to the fourth invention, since the duct is intermittently welded to the ceiling panel and joined, it is possible to prevent the ceiling panel from being distorted by welding or the like, and the contact portion of the duct and the ceiling panel is sealed. By being covered with the member, the airtightness of the duct can be ensured and the air from the air conditioner can be reliably guided to the target.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
(1) Overall Configuration FIG. 1 shows a bulldozer 1 as a work machine according to an embodiment of the present invention. The bulldozer 1 includes a vehicle main body 2, a traveling device 3, a work implement 4, and a cab 5. It is prepared for.
The vehicle main body 2 includes a steel main frame, and includes a driving engine 21 mounted in front of the main frame in the traveling direction, and a hydraulic circuit that is operated by the engine 21 (not illustrated). Is provided with a cab 5.
The traveling device 3 includes a pair of traveling bodies 31 provided on the lower side of the main frame. The traveling bodies 31 are provided at a track frame 32 extending along the traveling direction and a rear end of the track frame 32. Drive wheels 33 driven by a hydraulic motor, idle wheels 34 provided at the front end of the track frame 32, and crawler belts 35 wound around the drive wheels 33 and idle wheels 34 are provided.

The work machine 4 is provided at the front end of the main frame of the vehicle main body 2 and includes an earthwork plate 41, a lift cylinder 42, and a frame (not shown). The frame and the lift cylinder 42 are arranged with respect to the vehicle main body 2. The earthwork plate 41 is provided so as to be swingable in the vertical direction, and an earthwork plate 41 is provided at the tip of the earthwork plate 41 so as to be swingable with respect to the frame.
An operator who operates such a traveling device 3 and work implement 4 gets into the cab 5 and travels the bulldozer 1 and operates the work implement 4 to perform leveling work such as leveling on the bulldozer 1. Make it.

(2) Structure of Cab 5 As shown in FIG. 1, the bulldozer 1 according to the present embodiment is not provided with a conventional ROPS guard on the main frame, and therefore the cab 5 falls with its own structure. A structure that can withstand external forces is used.
Specifically, as shown in FIG. 2, the cab 5 includes a substantially base-type hexagonal frame 51 in a plan view, and the frame 51 is made of a steel pipe standing on the main frame of the vehicle body 2. Two main pillars 52, two steel pipe pillars 53 erected on the side surface, a pillar 54 erected on the front side, and the pillars 52, 53, 54 which are not shown in FIG. And a beam connecting the upper and lower ends.

The front part of the frame 51 is covered with the front panel 55, the side part is covered with the side panel 56, the back part is covered with the back panel 57, the top surface is covered with the ceiling panel 58, and the cab 5 is a box. Configured.
Each of the front panel 55, the side panel 56, and the rear panel 57 is formed with openings, and the window glasses 551, 552, 561, and 571 are fitted therein. The bulldozer 1 is steered while confirming the front, side, and rear. In addition, although illustration was abbreviate | omitted in FIG. 2, a door is provided in the traveling direction left side panel so that rotation is possible with respect to the pillar 53, and an operator gets on and off from this door.

(3) Structure of Air Conditioning Device 6 As shown in FIG. 2, an air conditioner 6 is provided at the upper end on the back side of the cab 5 as described above.
As shown in FIG. 3, the air conditioner 6 includes a device main body 61 provided on the upper back of the cab 5, a heater device 62 provided on the main frame of the vehicle main body 2, and the device main body 61 and the heater device 62. And a piping member 63 that connects the cooling water circulation piping and the compressor provided in the engine 21 (not shown).
Although not shown in FIG. 3, the apparatus main body 61 is fixed to the upper end side surface of the main column 52 that constitutes the frame 51 of the cab 5, and includes an air conditioner unit 611 and a condenser 612.

The air conditioner unit 611 is formed with an air outlet 613 and an air intake 614 so as to face the interior of the cab 5. Air in the cab 5 is taken in from the air intake 614, and heat is exchanged by the condenser 612. Thereafter, cool air is blown out from the air outlet 613. Although not shown, an outside air intake port for taking in outside air is formed on the lower surface of the air conditioner unit 611.
The capacitor 612 is configured as a heat exchanger that performs heat exchange using a refrigerant supplied via the piping member 63.

The heater device 62 includes a foot heater 621 and a water valve 622.
The foot heater 621 is a heater that warms the operator's foot portion in the cabin of the cab 5, and although not shown in FIG. 3, a hot water outlet pipe is connected to the water valve 622, and the tip of the hot water outlet pipe is A part of the cooling water that is connected to the cooling water circulation pipe of the engine 21 and has cooled the engine 21 flows through these hot water outlet pipes, and heat is exchanged by the foot heater 621 to warm the indoor lower space of the cab 5.

The piping member 63 is composed of a plurality of pipings for supplying hot water from the engine 21 and refrigerant from a compressor provided in the vicinity of the engine 21 to the apparatus main body from the side surface of the main column 52 of the cab 5 through the lower part of the cab 5. The relay pipe 631, the hot water return pipe 632, the refrigerant discharge pipe 633, the refrigerant suction pipe 634, and the drain pipe 635 are configured.
The hot water relay pipe 631 is a relay member that sends a part of the hot water supplied to the water valve 622 of the heater device 62 to the air conditioner unit 611, and a part of the hot water taken out from the engine 21 passes through the hot water relay pipe 631. Via the air conditioner unit 611.

The hot water return pipe 632 is a pipe member that is supplied to the air conditioner unit 611 via the hot water relay pipe 631 and returns the hot water after heat exchange is performed in the air conditioner unit 611 to the engine 21.
Although not shown in FIG. 3, the refrigerant discharge pipe 633 is a pipe that sends the refrigerant compressed by the compressor provided in the vicinity of the engine 21 to the condenser 612, and the heater device from the front of the vehicle body where the compressor is disposed. The side wall 62 extends upward from the side surface of the main column 52 at the rear end of the side surface of the cab 5 and is connected to the capacitor 612.

The refrigerant suction pipe 634 is a pipe that returns the refrigerant after the air in the cab 5 is cooled by heat exchange due to a change from the liquid phase to the gas phase, and returns to the compressor, and is opposite to the refrigerant discharge pipe 633 from the air conditioner unit 611. 3 extends downward along the main pillar 52 (not shown in FIG. 3), extends along the refrigerant discharge pipe 633 at a substantially lower central portion of the cab 5, and is connected to the compressor.
The drain pipe 635 is a pipe that discharges condensed water generated by heat exchange between the air conditioner unit 611 and the condenser 612 to the outside. The drain pipe 635 extends downward from the lower side surface of the air conditioner unit 611 along the main pillar 52 and extends below the main pillar 52. Condensate is discharged outside in the vicinity.

(4) Indoor structure of cab 5 As shown in FIG. 4, a duct having a width dimension corresponding to the air outlet 613 and the air inlet 614 of the air conditioner 6 is provided in the indoor portion of the cab 5 having the above-described structure. 7 and an interior liner 8 that further covers the duct 7 are provided.
The duct 7 is provided at a distal end of the duct body 71 and a duct body 71 that closes the air outlet 613 of the air conditioner 6 and sends the air blown from the air conditioner 6 to the front of the cab 5. A branch portion 72 that distributes the air sent from the duct main body 71 to the left and right and supplies the air to the front of the cabin 5 is configured.

The duct body 71 is formed as a straight member having a C-shaped cross section obtained by bending a sheet metal member, and is welded to the indoor side surface of the ceiling panel 58 of the cab 5. In this embodiment, since the reinforcing beam 581 that connects the upper ends of the columns 53 is provided on the indoor side surface of the ceiling panel 58, the substantial center of the duct main body 71 is the portion of the reinforcing beam 581. Projecting outward from the lower surface of the beam 581.
The branch portion 72 is also configured as a box-like body formed by bending a sheet metal member, is mounted so as to cover the tip portion of the duct body 71, and is fixed to the lower surface of the ceiling panel 58 by welding.

The interior liner 8 is configured by combining a molded product obtained by kneading a fibrous material such as kenaf and a synthetic resin as a binder into a substantially base shape in plan view, and has an appropriate elasticity. It functions as a member that protects the operator's head when he falls.
The interior liner 8 is formed with a protruding portion 81 at the base end portion, and a bulging portion 82 is formed so as to cross the side edge portion at the side edge portion and the substantially central portion. The protruding portion 81 and the bulging portion 82 are described in detail. As will be described later, a plurality of openings for attaching an air outlet and a steering device for the bulldozer 1 are formed.

(5) Detailed configuration of the air outlet in the cabin 5
(5-1) Air outlet layout As shown in FIG. 5, the interior ceiling surface of the cab 5 has a duct 7 disposed substantially in the center in the front-rear direction, and an interior liner 8 is formed so as to cover it. In the liner 8, a plurality of air blowing openings are formed on the inner side in the width direction of the duct 7.
Air outlets 811 and 812 are formed at both ends of the projecting portion 81 of the interior liner 8.
These air outlets 811 and 812 open at the side lower part of the duct 7, blow air along the window glass 571 provided on the back panel 57, and prevent fogging, frost, and the like from adhering to the window glass 571. .

Air outlets 821 and 822 are formed in the bulging portion 82 at positions corresponding to the lower portion of the duct body 71.
These air outlets 821 and 822 are disposed along the inclined surface of the bulging portion 82, open obliquely below the cab 5, and are formed to blow air to the operator when the operator is seated in the cab 5 chamber. Yes.
Air outlets 831 and 832 are formed at the front portion of the interior liner 8 along the inclined surface of the window glass 552 provided on the front panel, and an air outlet 833 is formed at the center of the front side of the rearview mirror. .
The air outlets 831 and 832 blow air to the window glass 552 to prevent fogging and frost from adhering to the window glass 552, and the air outlet 833 blows air to the window glass 551 and fogs the window glass 551. Prevents frost and so on from adhering.

  The interior liner 8 in which such air outlets 811, 812, 821, 822, 831, 832, and 833 are formed further has an opening on the inner side surface of the bulging portion 82, and this opening has a bulldozer An operation panel of one steering device 84, 85 is provided exposed. In other words, these devices 84 and 85 are provided at the indoor upper end side edge of the cab 5 avoiding the position where the duct 7 is disposed, and the cab 5 is reduced in size by not providing a steering device at the lower portion of the cab 5. I am trying.

(5-2) Retention of each outlet and duct 7 Next, a description will be given of a portion where the outlet and duct 7 formed in the interior liner 8 described above are accommodated.
FIG. 6 shows a cross-sectional view taken along line VI-VI in FIG.
The duct body 71 has an opening width that is substantially the same as the width of the air outlet 613 of the air conditioner 6, and is configured in a straight tube shape in which no branching portion or the like is formed. Openings for blowing out air from the air conditioner 6 are formed at positions corresponding to the outlets 811, 812, 821, 822 of the 71 interior liner 8, and louvers for adjusting the wind direction are provided at each opening. It has been. In addition, an opening is formed at a position corresponding to the outlets 831, 832, and 833 in the branch portion 72 on the distal end side, and a louver is provided in each opening.

Air outlets 811 and 812 for blowing air onto the window glass 571 of the back panel 57 are formed at the lower side end of the duct 7 as shown in FIG. 7 which is a cross-sectional view taken along the line VII-VII in FIG.
For this reason, the duct main body 71 is provided along the lower surface of the ceiling panel 58, and a main blower 711 that sends air blown out from the air outlet of the air conditioner 6 to the front of the cab 5, and the main blower 711. And a branch part 712 for blowing out part of the air blown out from the air conditioner 6 from the blowout openings 811 and 812. .

The branch portion 812 has a recess formed in the center of the lower portion, and although not shown in FIG. 7, an air intake port 614 of the air conditioner 6 opens into the interior of the cab 5 at this portion.
As shown in FIG. 8 which is a cross-sectional view taken along the line VIII-VIII in FIG. 7, the branch portion 812 branches the air from the air conditioner 6 in the horizontal direction by the upper branch pipe 712A, and the bent portion 712B. Therefore, the flow is bent downward so that air flows from the blowout port 812 along the indoor surface of the window glass 571.

As shown in FIG. 6, the air outlets 821 and 822 are formed on the inclined surface of the bulging portion 82 of the interior liner 8, and the air outlets 821 and 822 are provided with louvers for adjusting the air direction as described above. It has been. A reinforcing beam 581 traverses in the width direction of the cab 5 inside the bulging portion 82 and closes a part of the flow path of the duct body 71.
The air blown out from the air outlet 613 of the air conditioner 6 flows in front of the duct main body 71, hits the side surface of the reinforcing beam 581, forms a turbulent flow, and part of the air is blown out from the outlets 821 and 822. The The other part of the air flows along the lower surface of the reinforcing beam 581 and is supplied to the branch portion 72 disposed in front of the cab 5.

As shown in FIG. 6, the air outlet 833 has an opening formed on the lower surface side of the interior liner 8 at the approximate center of the branch portion 72, and a louver is provided in the lower opening of the branch portion 72 as described above. .
On the other hand, the air outlets 831 and 832 are along the inclined surface of the lower window glass 552 at positions shifted to both sides of the air outlet 833 as shown in FIG. 9 which is a cross-sectional view taken along the line IX-IX in FIG. An opening is formed in the direction, and a louver is similarly provided.
As shown in FIG. 4, the branch portion 72 is formed with a wall whose tip portion becomes gradually narrower. The direction of the air supplied from the duct body 71 is changed by the wall, and the outlets 831, 832 are formed. , 833 is blown out downward in the cabin of the cab 5.

(6) Joining Structure of Duct 7 and Ceiling Panel 58 and Manufacturing Procedure of Cab 5 As shown in FIG. 10, the duct body 71 and the ceiling panel 58 constituting the duct 7 are bent of the duct body 71. The front end surface and the interior surface of the ceiling panel 58 are welded by intermittent welding 91, and the outside of the contact portion between the duct main body 71 and the ceiling panel 58 is covered with the seal member 92 from the outside of the duct main body 71. The branch part 72 and the ceiling panel 58 are also welded and joined by the same structure.

  When manufacturing the cab 5 having such a duct 7, the frame 51 is first assembled by welding or the like, and then the front panel 55, the side panel 56, the back panel 57, and the ceiling panel 58 are welded to the frame 51. Further, after the duct 7 is joined and fixed to the indoor side surface of the ceiling panel 58 by intermittent welding 91 and the seal member 92 is applied, the devices 84 and 85 are attached to the frame 51, and finally the duct 7 is attached by the interior liner 8. Cover and attach to frame 51 as appropriate.

(7) Operation and effect of the present embodiment According to the present embodiment described above, the straight duct 7 having substantially the same width as the air outlet 613 of the air conditioner 6 is directly fixed to the ceiling panel 58. Most of the air blown out from the air outlet 613 can be blown forward, and the front of the cab 5 can be efficiently cooled and heated. In addition, since air can be blown out from the outlets 811 and 812 by the branch portion 712 of the duct body 71, cooling and heating on the rear side of the cab 5 are not impaired.

In addition, by adopting a configuration in which the duct 7 is directly fixed to the ceiling panel 58, the space with the interior liner 8 can be reduced and the thickness can be reduced. As shown in FIG. R can be secured sufficiently, and downsizing of the cab 5 can be promoted.
Furthermore, by joining the duct main body 71 and the ceiling panel 58 by the intermittent welding 91, it is possible to prevent the ceiling panel 58 from being distorted by welding, so that the appearance design of the ceiling surface of the cab 5 is not impaired.
Further, by covering the portion of the intermittent weld 91 with the seal member 92, the airtightness of the duct body 71 can be ensured and air can be reliably sent forward in the duct body 71.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the following description, the same parts as those already described are denoted by the same reference numerals and the description thereof is omitted.
In the first embodiment described above, the duct 7 and the ceiling panel 58 are joined by intermittent welding 91 as shown in FIG.
In contrast, the duct / ceiling panel joining structure according to the second embodiment, as shown in FIG. 11, forms a folded portion 101 on the contact surface of the duct 10 with the ceiling panel 58, The difference is that a weld bond 102 is used to bond and fix the ceiling panel 58.
The weld bond 102 is a two-component reaction curing type adhesive such as an epoxy resin. The weld bond 102 is applied to the folded portion 101 of the duct 10 and adhered to the ceiling panel 58, and then the weld bond 102 is cured by heat or the like. By doing so, the duct 10 is bonded and fixed to the ceiling panel 58.

According to such this embodiment, since the same operation and effect as the first embodiment described above can be enjoyed and the number of welding processes can be reduced, the manufacturing process can be simplified. Moreover, since it has not joined by the welding process, the attachment of the duct 10 is not particularly limited as long as it is before the interior liner 8 is attached.
Further, if the weld bond 102 is used, the contact surface between the duct 10 and the ceiling panel 58 can be blocked along the adhesive surface, and thus a sealing member as in the first embodiment is not required.

[Third Embodiment]
Next, a third embodiment of the present invention will be described.
In the first embodiment described above, as shown in FIG. 10, the sheet metal portion is exposed at the side surface portion of the duct 7.
In contrast, the duct configuration according to the third embodiment is different in that a heat insulating material 11 is provided on a side surface portion of the duct 7 as shown in FIG.
The heat insulating material 11 is made of a synthetic resin foam such as polyurethane foam, and is provided so as to cover the side surface portion along the extending direction of the duct 7.

  According to such 3rd Embodiment, in addition to the effect described in 1st Embodiment mentioned above, when cooling air from an air conditioner is ventilated by the duct 7, dew condensation arises in the side part of the duct 7. Can be prevented. Thereby, it is possible to prevent the dew condensation water from accumulating in the space between the ceiling panel 58 and the interior liner 8, and the control device provided on the upper side surface of the cab is not wetted by the dew condensation water.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described.
In the first embodiment described above, as shown in FIG. 10, the duct 7 and the ceiling panel 58 are joined by intermittent welding 91.
On the other hand, the joint structure of the duct 7 and the ceiling panel 58 according to the fourth embodiment is intermittently welded to a bracket 93 having a folded portion on the ceiling panel 58 as shown in FIG. As described above, there is a difference in that a space is provided between the ceiling panel 58 and the duct 7 and the duct 7 is fixed to the folded portion of the bracket 93 by a bolt and nut 94.

According to such this embodiment, since the same operation and effect as the first embodiment described above can be enjoyed, and a space is formed between the ceiling panel 58 and the duct 7, a heat insulating layer is provided by air. In other words, the air adjusted by the air conditioner 6 is not easily affected by the outside air, and it is possible to prevent condensation from forming in the duct.
In the present embodiment, a space is formed between the ceiling panel 58 and the duct main body 71. However, a heat insulating material mainly composed of cellulose or glass wool may be disposed in the space.

[Modification of Embodiment]
It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the above embodiment, the present invention is adopted as the cab 5 of the bulldozer 1. However, the present invention is not limited to this, and the present invention may be adopted as a cab of a hydraulic excavator or other construction machines.
Moreover, in the said embodiment, although the duct 7 was comprised from the duct main body 71 and the branch part 72, it may not be restricted to this but it may be an integral structure as much as possible by sheet metal processing, and it depends on easiness to manufacture. A duct may be configured by combining a plurality of sheet metal parts.
In addition, the specific structure, shape, and the like in the implementation of the present invention may be other structures as long as the object of the present invention can be achieved.

  INDUSTRIAL APPLICABILITY The present invention can be used for a work vehicle cab on which an operator of a bulldozer or a hydraulic excavator gets.

1 is a schematic perspective view showing a work vehicle according to a first embodiment of the present invention. The outline perspective view showing the structure inside the cab in this embodiment. The outline perspective view showing the structure of the air conditioner provided in the cab in this embodiment. The exploded perspective view showing the structure inside the cab in this embodiment. The top view showing the layout of the air blower outlet of the ceiling part in this embodiment. Sectional drawing in the VI-VI line of FIG. Sectional drawing in the VII-VII line of FIG. Sectional drawing in the VIII-VIII line of FIG. Sectional drawing in the IX-IX line of FIG. The fragmentary perspective view showing the joining structure of the duct and ceiling panel in this embodiment. The fragmentary perspective view showing the junction structure of the duct which concerns on 2nd Embodiment of this invention. The fragmentary perspective view showing the junction structure of the duct concerning a 3rd embodiment of the present invention. The exploded perspective view showing the junction structure of the duct concerning a 4th embodiment of the present invention. Sectional drawing showing the junction structure of the duct which concerns on 4th Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 5 ... Cab (cab main body), 6 ... Air conditioner, 7 ... Duct, 8 ... Interior liner, 58 ... Ceiling panel, 91 ... Intermittent welding, 92 ... Seal member, 811, 812 ... Outlet (rear outlet) ), 821, 822... Outlet (ceiling side air outlet opening), 831, 832, 833... Outlet (front side air outlet opening)

Claims (4)

A work vehicle cab provided in a work vehicle equipped with a work machine,
A cab body that is configured in a box shape including a front panel, a side panel, a back panel, and a ceiling panel, on which an operator who operates the work vehicle rides,
An air conditioner provided on the upper outside of the back panel;
Air that is integrally formed with the ceiling panel on the indoor side of the ceiling panel, has substantially the same width as the air outlet of the air conditioner, extends in the front-rear direction of the work vehicle, and is blown from the air conditioner A duct for blowing air in front of the work vehicle;
A pair of rear blowing openings formed on both sides of the duct along the back panel and for blowing air blown from the air conditioning device along the back panel; Cab. The work vehicle cab according to claim 1,
The work vehicle cab according to claim 1, wherein the duct is a straight duct having a substantially equal cross-section from the rear to the front. In the work vehicle cab according to claim 1 or 2,
The duct is formed with a front-side air blowing opening that is opened on the front end surface in the extending direction, and a ceiling-side air blowing opening that is opened on the lower surface of the intermediate portion of the duct.
The duct is covered by an interior liner provided on the cab body indoor side,
The interior liner includes three air outlets provided at positions corresponding to the front-side air outlet openings, two air outlets provided at positions corresponding to the ceiling-side air outlet openings, A work vehicle cab comprising: two air outlets provided at positions corresponding to a rear outlet opening. In the work vehicle cab according to any one of claims 1 to 3,
The duct is composed of a sheet metal material, and is joined to the metal ceiling panel room by intermittent welding,
A work vehicle cab, wherein a contact portion between the duct and the ceiling panel is covered with a seal member.

Images