KR20170023793A - Working vehicle - Google Patents

Abstract

And to improve the rigidity of a horizontally sliding type side door such as a one piece glass provided on the right and left sides of the cabin. The working vehicle of the present invention comprises a cabin (7) which covers a steering seat (8) on a traveling vehicle (2). The cabin 7 has a cabin frame 300 constituting a frame and a side door 323 closing the right and left portions of the cabin 7 so as to be openable and closable. A C-shaped reinforcing frame 401 is arranged on the inner surface side of the side door 323 when viewed from the side where the strength of the side door 323 is increased. The reinforcing frame 401 includes a vertical frame portion 402 extending along the rear edge side of the side door 323 and a lower frame portion 402 extending forward from the upper end side of the vertical frame portion 402 along the upper edge side of the side door 323 And a lower lateral frame portion 404 extending forward to divide the upper and lower sides of the side door 323 from the lower end side of the vertical frame portion 402. [

Description

Working vehicle {WORKING VEHICLE}

The present invention relates to a working vehicle called a tractor for agricultural work or a wheel loader for civil works.

Conventionally, a working vehicle such as an agricultural tractor has a cabin that covers a steering seat on a traveling vehicle (see, for example, Patent Documents 1 and 2, etc.). The cabin described in Patent Documents 1 and 2 has a cabin frame constituting a frame structure and a roof structure disposed on the upper side of the cabin frame. The cabin frame has a so-called frame structure in which a support (filler) or a beam member (beam) is combined, and a rigidity is secured by a support and a beam member.

Japanese Utility Model Publication No. 58-171715 Japanese Patent Application Laid-Open No. 2002-67657 Japanese Patent Application Laid-Open No. 2004-257036

In a working vehicle with this type of cabin, a horizontal turning type side door is provided at the right and left sides of the cabin. Side doors are often made of a piece of glass to secure the watch. In the side doors described in Patent Documents 1 and 2, a door lock member for switching the lock door to a lock state and a lock release state and a pair of upper and lower hinges for connecting the side door to the cabin frame so as to be able to open and close are directly attached. As a result, there has been a possibility that the support load of the side door or the impact load at the time of opening and closing are concentrated on the connection portion between the upper and lower hinges and the door lock member, and the side door may be twisted or broken.

In addition, since the conventional door lock member is located on the front side of the side door, when the operator moves down from the cabin, he must stand up from the steering seat and release the indoor lever of the door lock member and then push and open the side door. There was room for improvement in view of operability.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and provides a working vehicle in which improvements are made.

The present invention provides a working vehicle having a cabin for covering a steering seat on a traveling vehicle, the cabin including a cabin frame constituting a frame and a side door for closing the left and right portions of the cabin so as to be openable and closable, Wherein a reinforcing frame having a C shape is arranged on the inner side of the door so as to increase the strength of the side door and the reinforcing frame has a vertical frame portion extending along the rear edge side of the side door, An upper horizontal frame portion extending forwardly along the upper edge side of the side door and a lower lateral frame portion extending forwardly so as to divide the upper and lower sides of the side door from the lower end side of the vertical frame portion.

According to a second aspect of the present invention, there is provided a working vehicle according to the first aspect, further comprising: a door lock member for switching the side door to a locked state and a lock released state; And the reinforcing frame is connected.

According to a third aspect of the present invention, in the working vehicle according to the second aspect of the present invention, among the lower horizontal frame portions, a grip portion for switching the door lock member in the unlocking direction by manually pressing the portion of the operator seat, It is said that the sieve is installed.

According to a fourth aspect of the present invention, in the working vehicle according to any one of the first to third aspects, the hinge includes a hinge for connecting the side door to the cabin frame so that the side door can be opened and closed, And a hinge cover pivotally pivotally mounted on the hinge stay. The hinge stay is provided with a stopper member that contacts the inner surface of the hinge cover and restricts the maximum opening angle of the side door.

According to a fifth aspect of the present invention, in the working vehicle according to the fourth aspect of the present invention, the stopper member is a stopper bolt for screwing the stopper member into the hinge stay, and changes the contact position with the hinge cover by adjusting the screw- The maximum opening angle of the side door is controlled.

(Effects of the Invention)

According to the present invention, there is provided a working vehicle having a cabin for covering a steering seat on a traveling vehicle, the cabin including a cabin frame constituting a frame and a side door for closing the left and right portions of the cabin so as to be able to open and close, A reinforcing frame having a C shape is arranged on the inner surface side of the side frame so as to increase the strength of the side door and the reinforcing frame has a vertical frame portion extending along the rear edge side of the side door, And a lower lateral frame portion extending forward so as to divide upper and lower portions of the side door from a lower end side of the longitudinal frame portion. Therefore, the upper side of the side door And the reinforcing frame It is. Therefore, it is possible to improve the rigidity of the side door, which is often composed of one piece of glass by using the reinforcing frame as a strength member of the side door itself while securing a clock on the side of the cabin. Further, the lower transverse frame portion can be used as a railing at the time of raising and lowering the cabin.

According to the invention of claim 2, since the door frame member for switching the side door to the locked state and the unlocked state and the reinforcing frame are connected to the upper and lower pairs of hinges that openably and closably connect the side door to the cabin frame, The side door can be sandwiched by the door lock member, the upper and lower pairs of hinges and the reinforcing frame, and the reinforcing frame can be connected to the side door with simple and high strength. Therefore, the assembly work of the side door can be facilitated and the manufacturing cost can be reduced.

According to the invention of claim 3, since the grip body for switching operation of the door lock member in the unlocking direction is provided by manually pressing the hand side of the operator seated on the steering seat among the lower side horizontal frame parts, The door lock member can be unlocked only by a very simple operation of gripping the grip body, for example, in the frame body while sitting on the steered seat, so that the operability of opening the side door can be improved.

According to a fourth aspect of the present invention, there is provided a cabin frame including a hinge for opening and closing the side door so as to be openable and closable with respect to the cabin frame, wherein the hinge comprises a hinge stay provided on the cabin frame, a hinge stay pivotally rotatable on the hinge stay, The hinge stay is provided with a stopper member which is in contact with the inner surface side of the hinge cover and restricts the maximum opening angle of the side door so that only the stopper member attached to the hinge stay is used, The regulation of the maximum opening angle can be achieved. Therefore, it can be manufactured at a lower cost than the above-mentioned prior art, and cost reduction can be achieved.

According to a fifth aspect of the present invention, the stopper member is a stopper bolt for screwing the hinge stay into the hinge stay. By adjusting the screw insertion amount of the stopper bolt, the contact position with the hinge cover is changed to adjust the maximum opening angle of the side door The adjustment of the maximum opening angle of the side door can be performed very simply.

1 is a left side view of a tractor.
2 is a plan view of the tractor.
3 is a right side view of the tractor.
Fig. 4 is a perspective view of the tractor as seen from the right side oblique rear side. Fig.
5 is a left side view of the traveling vehicle.
6 is a left side view illustrating the detailed structure of the traveling vehicle.
Fig. 7 is a perspective view of the running vehicle as seen from the left tilted rear side. Fig.
8 is a right side view of the running vehicle.
9 is a right side view illustrating the detailed structure of the traveling vehicle.
10 is a perspective view of the running vehicle as seen from the right side oblique rear side.
11 is a left side view of the cabin.
12 is a plan view of the cabin.
13 is a front view of the cabin.
14 is a right side view of the cabin.
15 is a rear view of the cabin.
16 is a bottom view of the cabin.
17 is a left side view of the cabin frame.
18 is a plan view of the cabin frame.
19 is a front view of the cabin frame.
20 is a right side view of the cabin frame.
21 is a rear view of the cabin frame.
Fig. 22 is a perspective view of the cabin frame viewed from the left obliquely from the front. Fig.
Fig. 23 is a perspective view of the cabin frame as seen from the left side inclined rear side. Fig.
24 is a perspective view of the vibration-damping support structure of the cabin as seen from the left side obliquely from the front.
Fig. 25 is a perspective view of the vibration-damping support structure of the cabin as viewed from the rear of the right side inclined.
26 is an enlarged perspective view of right front strut and front beam member.
27 is an enlarged perspective view of the right rear support column and the rear side beam member.
28 is a plan view of the roof.
29 is a perspective view showing an inner loop.
Fig. 30 (a) is an enlarged cross-sectional view of the front beam member, Fig. 30 (b) is an enlarged sectional view of the rear beam member, Fig. 5 is an enlarged sectional view of the beam member.
31 (a) is an explanatory view showing a connection structure of a front beam member, a left beam member, and a left front beam, FIG. 31 (b) Fig.
32 (a) is an explanatory view showing the connection structure of the rear beam member, the left beam member and the left post support, and FIG. 32 (b) is a view showing the connection structure of the rear beam member, the right beam member, Fig.
Fig. 33 (a) is a side view of the base bracket, and Fig. 33 (b) is a rear perspective view of the base bracket.
34 is a left side view of the cabin showing the structure of the reinforcing frame.
35 is an inner view of the left side door showing the structure of the reinforcing frame.
36 is an enlarged perspective view of the cabin frame showing the attachment structure of the hinge.
37 is a plan sectional view of the hinge.
38 is a rear view of the rear glass.
39 is an inner view of the rear glass.
40 is a perspective view of the pivotable handle and the locked block.
41 is a plan sectional view of the pivotable handle and the locked block;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings as an example of a tractor as a work vehicle.

First, the outline of the tractor 1 will be described first with reference to Figs. 1 to 10. Fig. The running vehicle 2 of the tractor 1 in the embodiment is supported by a pair of left and right rear wheels 4 like a pair of left and right front wheels 3 as a running section. The tractor 1 is driven by driving the rear wheel 4 and the front wheels 3 with a common rail type diesel engine 5 (hereinafter simply referred to as an engine) as a power source mounted on the front portion of the traveling base 2 And is configured to travel forward and backward. The engine 5 is covered with a bonnet 6. A cabin 7 is provided on the upper surface of the traveling base 2 and a steering seat 8 is provided in the cabin 7 and a steering handlebar 8 for steering the steering direction of the front wheels 3 by steering, Round handles) 9 are disposed. At the lower left and right portions of the cabin 7, there are provided steps 10 in which the operator moves up and down. A fuel tank 11 for supplying fuel to the engine 5 is provided below the bottom of the cabin 7.

The traveling base 2 is constituted by an engine frame 14 having a front bumper 12 and a train axle case 13 and left and right base frames 15 detachably fixed to the rear portion of the engine frame 14 have. And the electric train shaft 16 is rotatably projected from the left and right ends of the electric train shaft case 13 in the outward direction. The front wheels 3 are attached to the right and left ends of the case 13 of the electric vehicle via the electric train shaft 16. [ A transmission case for the transmission of the rotational force from the engine 5 to the front and rear four wheels 3, 3, 4, 4 is connected to the rear portion of the base frame 15. A rectangular frame plate-like tank frame 18 is bolted to the bottom surfaces of the left and right base frame 15 and the mission case 17 as seen from a bottom surface protruding in left and right outward directions. The fuel tank 11 of the embodiment is divided into two right and left sides. The left and right fuel tanks 11 are mounted on the upper surface side of the left and right projecting portions of the tank frame 18 in a divided manner. The left and right outer side surfaces of the transmission case 17 are mounted so as to protrude outward from the left and right rear axle cases 19. The left and right rear axles 20 are rotatably inserted into the left and right rear axle cases 19. And the rear wheel 4 is attached to the transmission case 17 via the rear axle 20. The upper portions of the left and right rear wheels 4 are covered by the left and right rear fenders 21.

On the upper surface of the rear portion of the mission case 17, for example, a hydraulic lifting mechanism 22 for lifting and moving a working machine called a rotary tiller is detachably attached. A rotary tiller or the like is connected to the rear portion of the mission case 17 through a three-point link mechanism composed of a pair of right and left lower links 23 and a top link 24. A PTO shaft 25 for transmitting a PTO driving force to a working machine such as a rotary tiller or the like is provided on the rear side of the transmission case 17 so as to protrude rearward.

The flywheel 26 is attached directly to an engine output shaft (not shown) protruding rearward from the rear side of the engine 5. A main shaft 27 projecting backward from the flywheel 26 via a power transmission shaft 29 having a material shaft coupling at both ends and a peripheral speed input shaft 28 projecting forwards from the front surface of the mission case 17 (See Figs. 1, 7 and 10). In the transmission case 17, a hydraulic CVT, a forward / backward switching mechanism, a traveling portion transmission gear mechanism, and a rear differential gear mechanism are disposed. The rotational power of the engine 5 is transmitted to the peripheral speed input shaft 28 of the transmission case 17 via the main shaft 27 and the power transmission shaft 29 and is transmitted to the input shaft 28 via the hydraulic CVT and transmission gear mechanism It is shifted moderately. Then, the transmission power is transmitted to the left and right rear wheels 4 through the rear differential gear mechanism.

The front wheel output shaft 30 protruding forward from the lower portion of the front face of the transmission case 17 is moved rearward from the front wheel axle case 13 housing the front wheel differential gear mechanism (not shown) via the front wheel drive shaft 31 And connects the protruded whole wheel transmission shaft (not shown). The transmission power of the hydraulic CVT and transmission gear mechanism in the transmission case 17 is transmitted from the front wheel output shaft 30, the front wheel drive shaft 31 and the front wheel transmission shaft to the front differential gear And transmitted to the left and right front wheels 3 via the mechanism.

Next, the structure inside the cabin 7 will be described with reference to Figs. 1 to 4. Fig. The steering column 32 is disposed in front of the steering seat 8 in the cabin 7. The steering column 32 is installed to stand on the backside of the dashboard 33 disposed on the front side in the cabin 7. A steering handle 9 of a substantially round shape as viewed from the top is attached to the upper end side of the steering shaft projecting upward from the upper surface of the steering column 32.

A one-touch lift lever 34 for forcibly moving a working machine such as a rotary tiller or the like to the highest position or the lowest position is provided on the right side of the steering column 32 and a pair of left and right brake pedals 35 for braking the traveling vehicle 2 ). On the left side of the steering column 32, forward and backward switching levers 36 (reverser levers) for switching the traveling direction of the traveling base 2 forward and backward, and clutches (not shown) And a clutch pedal 37 for operating.

A manipulation preventing member 38 (reverser guard) extending along the forward / backward switching lever 36 is disposed below the forward / backward switching lever 36 on the left side of the steering column 32. The erroneous operation preventing member 38 is disposed below the forward and backward switching levers 36 to prevent the operator from inadvertently touching the forward and backward switching levers 36 when ascending and descending to the tractor 1. [ An operation display panel 39 incorporating a liquid crystal panel is provided on the backside of the dashboard 33.

An accelerator pedal 41 for controlling the rotational speed or the vehicle speed of the engine 5 is disposed on the right side of the steering column 32 in the bottom plate 40 in front of the steering seat 8 in the cabin 7. Further, substantially the entire upper surface of the bottom plate 40 is formed on a flat surface. Side columns 42 are disposed on both left and right sides of the steering seat 8. A parking brake lever 43 for performing an operation of maintaining the left and right rear wheels 4 in a braked state is provided between the steering seat 8 and the left side column 42, An auxiliary speed change lever 45 for switching the output range of the transmission side speed change gear mechanism in the transmission case 17 and a PTO shaft 25 for reducing the output range of the transmission side speed change gear mechanism in the transmission case 17, And a PTO shift lever 46 for switching the drive speed of the PTO shift lever 46 are disposed. A defense lock pedal 47 for turning on and off the differential drive of the left and right rear wheels 4 is disposed below the steering seat 8. On the rear left side of the steering seat 8, there is disposed a reverse PTO lever 48 for performing an operation of reversely driving the PTO shaft 25. [

Between the steering seat 8 and the left side column 42, there is provided an armrest 49 for placing an arm or an elbow of an operator seated on the steering seat 8. The arm rest 49 is constructed separately from the steering seat 8 and is provided with a peripheral speed lever 50 for increasing or decreasing the traveling speed of the tractor 1, And a dial position dial 51 (elevation dial) for dialing. In addition, the armrest 49 is structured so as to be able to be lifted up in a plurality of steps with the rear lower end as a point.

The left side column 42 is provided with a throttle lever 52 for setting and maintaining the rotational speed of the engine 5 in order from the front side and a PTO shaft 52 for stepping the power transmission from the PTO shaft 25 to a working machine such as a rotary tiller. A clutch switch 53 and a plurality of hydraulic operating levers 54 (SCV levers) for switching operation of a hydraulic external withdrawal valve (sub-control valve, not shown) disposed on the upper surface side of the transmission case 17 have. Here, the hydraulic external draw-out valve is for supplying and controlling the operating oil to a separate working machine called a front loader, which is mounted on the tractor 1 afterwards. In the embodiment, four oil pressure operating levers 54 are arranged in accordance with the number of hydraulic external draw-out valves (four wheels).

Next, the detailed structure of the cabin 7 will be described with reference to Figs. 11 to 27. Fig. The cabin 7, which covers the steering seat 8 on the traveling base 2, is provided with a cabin frame 300 constituting a frame. The cabin frame 300 includes a pair of left and right front struts 301 positioned in front of the steering seat 8, a pair of right and left rear struts 302 positioned at the rear of the steering seat 8, A rear beam member 304 connecting the upper ends of the rear struts 302 to each other and a front strut 301 and a rear strut 302 arranged back and forth, And a left side and a right side beam member 305 connecting the upper ends of the frame members 302. The roof member 306 is detachably mounted on the upper end side of the cabin frame 300, that is, on the rectangular frame composed of the front side beam member 303, the rear side beam member 304, and the left and right side beam members 305 have.

On the lower end side of each of the front struts 301, the left and right outer end sides of the front lower plate plate 307 extending in the left and right inward directions are connected. A vertical board support plate 308 for fixing and supporting the dashboard 33 is connected to the left and right inner end sides of the left and right front lower plate plates 307 and a board support plate 308 is provided between the left and right front supports 301 I installed it standing up. On the other hand, a rear intermediate beam member 309 extending in parallel with the rear beam member 304 is connected between the lower ends of the left and right rear supports 302. The rear intermediate beam member 309 is connected to the upper ends of a pair of left and right rear lower frames 310 extending downward. The front lower plate plate 307 and the rear lower frame 310, which are arranged in the front and rear directions, connect the respective longitudinal ends of the bottom frame 311 extending in the front and rear direction.

The lower end of each rear support 302 is connected to the rear upper end side of the fender frame 312, which is curved forwardly and upwardly as viewed from the side along the shape of the rear fender 21. [ The front end lower side of each fender frame 312 is connected to the rear end side of the side frame 313 protruding backward from the lower portion of the corresponding front support 301. The left and right outer end sides of the front lower plate plate 307 are also connected to the respective side frames 313. Left and right rear fenders 21 are attached to left and right outer sides of the respective fender frames 312 and left and right outer sides of the rear lower frame 310 corresponding thereto.

A rear cover plate 314 is attached to the rear intermediate beam member 309 and the left and right rear lower frames 310 to cover a region surrounded by the rear intermediate beam member 309 and the left and right rear lower frames 310. An L-shaped seat support plate 315 is attached to the lower end side of the rear cover plate 314 and the left and right bottom frames 311 when viewed from the side. A steering seat 8 is disposed on the seat support plate 315. The fender inner plate 316 of the bulging shape along the inner surface of the front portion of the rear wheel 4 is attached to the left and right fender frame 312, the rear lower frame 310 and the bottom frame 311. [ The side columns 42 are disposed on the left and right fender inner plates 316. A bottom plate supporting plate 317 is attached and supported on the front end side of the left and right front lower plate plates 307, the front frame side of the bottom frame 311, the side frames 313 and the seat support plate 315. A bottom plate 40 is disposed on the left and right bottom plate support plates 317. [ The front lower end side of the left and right fender frame 312 and the front and rear intermediate portions of the bottom frame 311 corresponding thereto are connected by an auxiliary frame 318 of left and right width.

The front glass 321 is disposed in a region surrounded by the front side of the cabin frame 300, that is, the left and right front struts 301, the front side beam member 303, and the left and right front lower plate plates 307. The rear glass 322 is disposed in a region surrounded by the rear side of the cabin frame 300, that is, the left posterior support 302, the rear beam member 304 and the rear intermediate beam member 309. The area surrounded by the front strut 301 and the rear strut 302, the side beam member 305, the fender frame 312, and the side frame 313 arranged on the left and right sides of the cabin frame 300, And a side door 323 made of glass is disposed. Each side door 323 is attached to a corresponding rear support 302 via a pair of upper and lower hinges 324 so as to be openable and closable.

As is apparent from the arrangement structure of the front glass 321, the rear glass 322 and the left and right side doors 323, the struts 301 and 302 and the respective beam members 303, 304, Cabin frame 300). As a result, it is possible to take a wide window on the front, rear, left and right sides of the cabin frame 300. In the embodiment, the front glass 321, the rear glass 322, and the left and right side doors 323 (made of transparent glass) are arranged on the front, rear, left and right sides of the cabin frame 300. As a result, both the securing of the front, rear, left and right clocks of the operator, and ensuring the rigidity of the cabin frame 300 are achieved.

As shown in Figs. 22 to 25, the front side of the left and right front lower plate plates 307 is provided with a front support plate 96 attached to the left and right base frames 15 via a front anti- ). Further, a base bracket 327 protruding leftward and rightward is provided at a connecting portion (a base portion) between the left and right rear lower frames 310 and the bottom frame 311. The left and right base brackets 327 are connected to a rear support 97 attached to the left and right rear axle cases 19 via a rear anti-vibration rubber member 99 as an anti-vibration member. Therefore, the traveling base 2 is supported by the vibration-proof rubber members 98, 99 in a vibration-proof manner to the cabin 7.

11 to 27, the cabin frame 300 is provided with various support stays 331, 335, 338, and 343 for attaching a lug member. In other words, a pair of right and left front upper support stays 331 are welded to the center portion of the front side beam member 303. Each front upper support stay 331 is of a thin plate shape projecting obliquely forward and upward. A front upper work lamp 333, which is an example of a lamp member, is attached to each front upper support stay 331 via a front attachment piece 332 extending forward and downward. The left and right front upper work lamps 333 illuminate the front of the tractor 1. The left and right front upper work lamps 333 are positioned so as to overlap with the front side beam member 303 when viewed from the front so as not to interfere with the front watch of the operator. A depression 334 (also referred to as a swelling portion) which is depressed upward is formed on the front side of the roof body 306 so as to sandwich the front upper work lamps 333 therebetween. Since the front upper work lamp 333 is accommodated in each of the depressed portions 334 on the front side when the roof body 306 is attached to the upper end side of the cabin frame 301, (333) does not interfere.

On the other hand, on the upper end side of the left and right rear pillars 302, rearward and leftward outward directions away from both the rear side beam member 304 and the left and right side beam members 305 as viewed from the plane are provided so as not to interfere with the front watch of the operator And the proximal end side of the upper support stay 335 is welded and fixed. And a rear upper work lamp 337, which is an example of a lamp member, is attached to the front end side of each rear upper end support stay 335 via a rear attachment piece 336 extending backward. The left and right rear upper work lamps 337 illuminate the rear of the tractor 1 (such as a working machine). The rear upper support stay 335 is provided on the upper end side of each rear support 302 rather than the rear side beam member 304 so as to secure the rear view of the operator. (Arrangement space of the rear cover 363 for accommodating the air conditioner 364) at the rear side of the roof body 306 is secured.

The proximal end side of the front interrupted support stay 338 is welded to the upper and lower portions of the right and left front supports 301. A front composite lamp 339 and a forward stop work lamp 340, which are examples of lamp members, are attached to the front end side of each front interchangeable stay 338. [ Each front interrupting stay 338 includes a front side beam member 303 and a left side beam member 303 and a right side beam member 314 when seen from the plane so that the front composite light 339 and the front interrupting operation lamps 340 do not interfere with the operator & 305, and is curved so as to extend forward from the lengthwise middle portion. The front composite lamp 339 indicates the intentions such as the width of the tractor 1 and the turning of the tractor 1 relative to a person or a person in front of the tractor 1. The front composite lamp 339 is a light source Respectively. The left and right forward interruption work lamps 340 illuminate the front of the tractor 1. In the embodiment, upper and lower length attachment brackets 341 are provided on the front end side of the front interchangeable support stay 338, respectively, and a front composite light 339 is attached to the front face side of the attachment bracket 341. A front interrupting operation lamp 340 is attached to the upper end of the attaching bracket 341. In the left and right front struts 301, a side mirror 342 is attached above the front interrupted support stays via mirror stays 341. The mirror stay 341 also extends forward in the left and right outward directions away from both the front side beam member 303 and the left and right side beam members 305 when seen from the plane so as not to interfere with the front view of the operator.

And the front side of the rear lower end support stay 343 of the upper and lower lengths is welded to the lower portion of the right and left rear supports 302. [ A rear composite light 344 and a rear lower work light 345, which are examples of lamp members, are attached to the rear surface side of each rear lower stage support stay 343. Each rear lower support stay 343 projects left and right outward from the left and right rear supports 302 as viewed from the rear so that the rear composite lamp 344 and the rear lower work lamp 345 do not interfere with the rear view of the operator have. The rear composite lamp 344 indicates the intention of the tractor 1 to decelerate, stop, retract, and turn to the left or to the rear of the tractor 1, A brake light, a retraction light, and a turn signal lamp. The left and right rear lower work lights 345 illuminate the right and left chambers of the tractor 1. In the embodiment, a rear composite lamp 344 is attached to the front surface side of each rear lower stage support stay 343. And a rear lower end work lamp 345 is attached to an upper end side of the rear lower end support stay 343. The front composite light 339 and the rear composite light are set to substantially the same height up and down positions.

Although not shown in detail, in the embodiment, the cabin frame 300 is formed in a hollow shape, and the inside of the hollow shape is formed in the wiring passage for inserting and passing the cable flow. Then, cables are drawn out from notches (not shown) formed in the respective struts 301 and 302, the beam members 303 and 304 and the support stay, and the cables are wound around the respective lighting member members 333, 337, 339, 340 and 344 And 345, respectively.

11 to 27, the cabin 7 covers the cabin frame 300 which constitutes the frame, and the cabin 7 covers the cabin frame 8 on the running vehicle 2. The cabin 7, And a roof member (306) disposed on the upper end side of the cabin frame (300), wherein the support stay (333, 337, 339, 340, 344, 345) 333, 337, 339, 340, 344, and 345 can be directly attached to the cabin frame 300 because the cabin frames 331, 335, 338, and 343 are installed in the cabin frame 300. This contributes to an improvement in assembling workability in the manufacturing line, thereby reducing cost.

The cabin frame 300 includes a pair of left and right front supports 301, a pair of right and left rear supports 302 and a front side beam member 303 connecting between the upper ends of the front supports 301 A rear beam member 304 connecting between the upper ends of the rear struts 302 and a side beam member 305 connecting between the front strut 301 and the upper ends of the rear struts 302, A front composite lamp 339 and a front interrupting operation lamp 340 as the lighting member are attached to the support stay 338 provided at the upper and lower parts of the front support columns 301, Since the rear composite lamp 344 and the rear lower work lamp 345 as the lamp members are attached to the support stay 343 provided at the lower portion of the rear support 302, The front composite lamp 339 and the front interruption lamp 340 are arranged and attached And the rear composite lamp 344 and the rear lower work lamp 345 can be collectively attached to the support stay 343 on the side of each of the rear supports 302. [ That is, each of the support stays 338, 343 can be used also as a support member for the plurality of fixture members 339, 340, 344, 345, contributing to the reduction in the number of parts. Also, the treatment of the cable flow to the plurality of lighting fixture members 339, 340, 344, and 345 can be simplified. It is easy to secure the front, back, right, and left timepieces from within the cabin 7.

11 to 27, the cabin 7 covers the cabin frame 300 which constitutes the frame, and the cabin 7 covers the cabin frame 8 on the running vehicle 2. The cabin 7, And a roof member (306) disposed on an upper end side of the cabin frame (300), wherein the cabin frame (300) includes a pair of left and right front supports (301) A front side beam member 303 connecting between the upper ends of the front struts 301 and a rear side beam member 304 connecting between the upper ends of the rear struts 302, And a side beam member 305 connecting the front strut 301 and the upper end of the rear strut 302 arranged in the front and rear directions, The front upper work lamp 333 is attached to the support stay 331 while the front upper work lamp 333 is attached to the upper end side of each of the rear supports 302 Since the rear upper work lamp 337 is attached to the installed support stay 335, the front upper work lamp 333 can be directly attached to the front side beam member 303, And the rear upper work lamp 337 can be directly attached to the rear upper work lamp 304. This contributes to an improvement in assembling workability in the manufacturing line, thereby reducing cost. In addition, since it is not necessary to attach the upper work lamps 333 and 337 to the roof body 306 or to crawl cables, it is also possible to simplify the assembly work of the roof body 306 with respect to the cabin frame 300 can do. This also contributes to improvement in assembling workability in a manufacturing line.

Further, since the front upper work lamps 333 are positioned so as to overlap with the front side beam member 303 when seen from the front, the front watch of the operator seated on the steering seat 8 is positioned at each of the front upper work lamps It is possible to remarkably reduce the possibility of shutting off the power supply 333, and thus it is possible to ensure a good front watch of the operator.

Next, with reference to Figs. 11 to 23, the detailed structure of the step 10 provided at the lower left and right of the cabin 7 will be described. As shown in Figs. 11 to 23, a step 10 in which an operator moves up and down is hung on the left and right lower sides of the cabin 7 between the front wheel 3 and the rear wheel 4 arranged front and rear. The step 10 of the embodiment includes a plurality of foot stepped sections 351 (two steps in the embodiment) and front and rear side plate sections 352 and 353 connected to the foot step sections 351. The plurality of foot stepped portions 351 are shifted from each other in the front-rear direction so as to move away from the rear wheel 4 toward the lower end. In the embodiment, the foot stepped portion 351 on the lower end side is shifted forward from the foot stepped portion 351 on the upper end side.

In this case, the front side plate portion 352 is formed in a substantially L shape when viewed from the front side. The upper end side of the vertical length portion 354 of the front side plate portion 352 is bolted to a bracket piece 355 welded and fixed to the lower end side of each front support 301. The front end side of the step portion 351 of the upper end side is fixed to the vertically long portion of the longitudinal portion 354 of the front side plate portion 352. The lower end side horizontal portion 356 of the front side plate portion 352 fixes the front end side of the foot step portion 351 on the lower side. The lower end horizontal portion 356 of the front side plate portion 352 protrudes forward than the vertical length portion.

The upper end side of the rear side plate portion 353 is bolted to an auxiliary frame 318 for connecting the left and right fender frames 312 to the bottom frame 311. And the rear end side of the step portion 351 of the upper end side is fixed to the upper and lower portions of the rear side plate portion 353. [ And the rear end side of the lower step side step portion 351 is fixed to the lower end side of the rear side plate portion 353. The rear side plate portion 353 is inclined downward in an obliquely forward direction and is further bent forward in the vicinity of the vertical midway portion. With this configuration, the moving direction of the operator riding on the cabin 7 can be easily directed upward obliquely rearwardly toward the steering seat 8 (by shifting the arrangement of the foot stepped portions 351) It is possible to direct the light to the light source. Therefore, the elevation of the cabin 7 can be remarkably improved.

As shown in Figs. 13, 19, 22, and 23, the lateral width of the rear side plate portion 353 is set wider than the width of the front side plate portion 352 (the longitudinal portion 354) in the lateral direction have. In this configuration, the presence of the front side plate portion 352 (the longitudinal portion 354) is not disturbed when the operator puts the foot on each foot stepped portion 351, and the elevation of the elevation of the cabin 7 . Further, since the rear side plate portion 353 is wide, the presence of the rear side plate portion 353 can effectively suppress the soil of the rear wheel 4.

11-23, the traveling vehicle 2 on which the engine 5 is mounted, a pair of left and right front wheels 3 and rear wheels 4 for supporting the traveling vehicle 2, A work vehicle (1) comprising a cabin (7) covering a steering seat (8) on a traveling base (2) and a step (10) for ascending and descending in the cabin (7) The step 10 is provided between the wheel 3 and the rear wheel 4 by hanging the step 10 on the left and right lower sides of the cabin 7. The step 10 includes a plurality of stepped steps 351, And the front and rear side plate portions 352 and 353 connected to the foot step portions 351. The plurality of foot step portions 351 are arranged in the forward and rearward directions so as to move away from the rear wheel 4 toward the lower end So that the foot stepped portions 351 are located above the stepped portions 351 along the copper lines of the operator facing the inside and the outside of the cabin 7 Thereby it is possible to highly improve the rigidity of the W to the cabin (7).

Since the lateral width of the rear side plate portion 353 is set wider than the width of the front side plate portion 352 (the longitudinal portion 354) in the lateral direction, The presence of the front side plate portion 352 is not disturbed when the foot is placed on the cabin 7 and contributes to the elevation of the cabin 7 in elevation. Further, since the rear side plate portion 353 is wide, the presence of the rear side plate portion 353 can effectively suppress the soil of the rear wheel 4.

Next, the air conditioning structure inside and outside the roof body 306 will be described with reference to Figs. 1, 2, 11, 14, 28, and 29. Fig. The roof member 306 attached to the upper end side of the cabin frame 301 includes an outer loop 361 which is an outer case, an inner loop 362 which constitutes a ceiling of the cabin 7, And a rear cover 363 protruding rearward. The inner roof 362 and the rear cover 363 are covered with the outer loop 361 from above so that the inside of the roof body 306 is hollow. Therefore, the rear side of the outer loop 361 also extends rearward beyond the rear side beam member 304. [ The depressed portion 334 (swollen portion) in which the front upper work lamps 333 are fitted is formed on the front side of the outer loop 361.

The interior of the roof body 306 is partitioned into two front and rear chambers by an inner loop 362 and a rear cover 363. The space on the inner loop 362 side corresponds to the front chamber and the space on the side of the rear cover 363 corresponds to the rear chamber. An air conditioner 364 for managing the air conditioning in the cabin 7 is accommodated in the rear room side (the rear cover 363 side) inside the roof body 306. The air conditioner 364 adjusts the air conditioning (room temperature) in the cabin 7 by cooling using the cooling water of the engine 5, cooling using a compressor, a condenser, and a distributor driven by the engine . The air conditioner 364 is disposed on the side of the rear cover 363 protruding rearward from the rear beam member 304 to prevent the height of the cabin 7 from becoming higher than necessary. Particularly, in the embodiment, the rear upper support stay 335 is provided on the upper end side of each rear support 302 rather than the rear side beam member 304, so that the rear right support stay (Space for disposing the rear cover 363 for accommodating the air conditioner 364) between the front roof cover 331 and the rear roof cover 335 is secured.

The rear cover 363 is connected to the rear side beam member 304 of the cabin frame 300. Therefore, the rear cover 363 and the air conditioner 364 are supported by the rear side beam member 304 of the cabin frame 300. A sealing member 365 is attached to the edge of the rear cover 363. [ The seal member 365 is brought into close contact with the inner surface of the outer loop 361 and the inner surface of the inner surface of the rear roof 361 (On the side of the rear cover 363) becomes a sealed shape.

The left and right portions of the outer loop 361 are inclined such that they are cut obliquely downward toward the inside and the outside. 1 to 10) for discharging the exhaust gas of the engine 5 out of the left and right portions of the outer loop 361 to the rear side of the roof body 306 (The side of the sub cover 363) is made to communicate with the outside. In this case, the tail pipe 229 is provided so as to extend upward from the lower side on the front right side of the cabin 7 (extending along the right front support 301). On the other hand, the outside air inlet 366 is formed at the rear side of the left side portion of the outer loop 361 (the portion corresponding to the rear side cover 363). The outside air inlet 366 faces the air conditioner 364 in the rear cover 363 through a communication hole (not shown) formed in the left side wall of the rear cover 363 from the left side. A lattice-shaped ventilation frame body 367 is attached to the outside-air introduction port 366. Although a detailed illustration is omitted, a dust filter is attached to the communication hole formed in the left side wall portion of the rear cover 363. On the other hand, an inner air inlet 368 for communicating the inside of the rear cover 363 and the inside of the cabin 7 is provided at the rear side of the inner loop 362, which is opposed to the rear head portion of the operator seated on the steering seat 8 . A ventilation frame body 369 on the lattice is mounted on the inside air inlet 368.

An inside / outside switching shutter plate 370 for opening / closing a communication hole formed in the left side wall of the rear cover 363 is disposed in the rear cover 363. The internal and external switching shutter plate 370 is configured to be opened and closed by driving of the actuator 371. When the indoor / outdoor switching shutter plate 370 is opened, the communication port of the rear cover 363 is opened so that the air conditioner 364 in the rear cover 363 is driven to communicate with the ambient air introducing port 366 Outside air is introduced into the rear cover 363 through the opening. When the indoor / outdoor switching shutter plate 370 is removed and closed, the communication hole of the rear cover 363 is closed so that outside air does not enter from the outdoor air inlet 366. By driving the air conditioner 364 The air in the cabin 7 is guided from the air introduction port 368 into the rear cover 363. In the embodiment, the ratio of the outside air to the inside air introduced into the air conditioner 364 in the rear cover 363 can be adjusted by the opening (opening and closing degree) of the inside / outside switching shutter plate 370.

The adjustment air discharge port 372 formed on the front surface side of the air conditioner 364 is connected to the adjustment air discharge port 372 from the plane that guides the adjustment air from the rear chamber side (the rear cover 363 side) to the front chamber side (the inner loop 362 side) The upstream side of the air duct 373 having a bifurcated shape is connected. The upstream side of the air conditioning duct 373 is located above the air inlet opening 368 and is branched into a bifurcate shape passing through the front side of the rear cover 363 and the rear side of the inner loop 362 have. The bifurcated duct portion 374 of the air conditioning duct 373 is formed in a rectangular shape as viewed from a plane along a rectangular frame constituted by the front side beam member 303, the rear side beam member 304 and the left and right side beam members 305 And extends in a rectangular shape. A regulating shutter plate 370 for regulating the communicating state of the air blowing vent 375 and the duct portion 374 provided on both left and right sides of the inner loop 362 is provided at the middle portion of each duct portion 374 of the air conditioning duct 373 376 are disposed. The left and right adjusting shutter plates 376 are configured to rotate in cooperation with the actuator 377 and the push-pull wire 378. The downstream side of each duct portion 374 of the air conditioning duct 373 is communicated with the front portion of the inner loop 362 to the fog removal spouting port 379. [ Each of the air blow-out ports 375 and 379 is provided with a pin (not shown) for changing the air flow rate or direction of the air to be adjusted from the air conditioner 364.

The flow of the conditioned air from the air conditioner 364 to the downstream side of each of the duct portions 374 is blocked by the left and right adjusting shutter plates 376, And blows into the cabin 7 only from the cooling / heating jet port 375. The control air from the air conditioner 364 is supplied to the cabin 7 only from the left and right fog removing spouts 379. In this case, Lt; / RTI > It is possible to adjust the air volume of the conditioned air from the cooling / heating spray port 375 and the air volume of the conditioned air from the fog removal spray port 379 according to the rotation angle of the left and right adjustment shutter plate 376. [

A cabin 7 which covers the steering seat 8 on the running vehicle 2 as is evident from the above description and Figs. 1, 2, 11, 14, 28 and 29, 7 is a working vehicle 1 having a cabin frame 300 constituting a frame and a roof body 306 arranged on the upper end side of the cabin frame 300. The working vehicle 1 includes a cabin frame 300, A tail pipe 135 for discharging the exhaust gas of the engine 5 to the outside is provided on one of right and left sides of the traveling base 2 and the inside of the roof body 306 is divided into two front and rear chambers, And an outside air inlet 366 for communicating the rear chamber 363 with the outside is formed on the opposite side of the tail pipe 229 from the right and left side portions of the roof body 306 It is possible to prevent the exhaust gas from the tail pipe 229 from being introduced into the outside-air introduction port 366 without fail.

The cabin frame 300 includes a pair of left and right front supports 301, a pair of right and left rear supports 302 and a front side beam member 303 connecting between the upper ends of the front supports 301 A rear beam member 304 connecting between the upper ends of the rear struts 302 and a side beam member 305 connecting the front strut 301 and the upper end of the rear strut 302 arranged forward and backward The rear chamber 363 of the roof body 306 is projected rearward from the rear side beam member 304 to support the rear chamber 363 with the rear side beam member 304, Since the rear upper work lamp 337 is attached to the support stay 335 provided on the upper end side of the rear support 302, The air conditioner 364 can be disposed in the front chamber 362 of the roof body 306, 64), it is possible to avoid the problem of limiting the front clock of the operator. A rear upper work lamp 337 is attached to a support stay 335 provided on the upper end of each of the rear supports 302 so that the arrangement space of the roof body 306 on the rear room 363 side It can be formed between the support stay 335 for the upper work lamp 337 and the back watch of the operator can be secured well.

Next, the detailed structure of the beam members 303, 304, and 305 will be described with reference to Figs. 30 (a) to 30 (d), Figs. 31 and 32. Fig. As described above, the rectangular frame supporting the roof body 306 is provided with the front side beam member 303, the rear side beam member 304, and the left and right side beam members 305. The front side beam member 303, the rear side beam member 304, and the left and right side beam members 305 correspond to a frame member constituting the cabin frame 300. As shown in Fig. 30 (a), the front beam member 303 is made of a pipe material having a hollow shape (rectangular in cross section), and is elongated in the lateral direction. As shown in Figs. 31 (a) and 31 (b), the left and right end surfaces of the front beam member 303 are welded and fixed to the upper surface of the front strut 301. [

The rear beam member 304 and the left and right side beam members 305 are both made of a C-shaped (groove-shaped) steel material. The rear beam member 304 extends in the left-right direction and the left and right side beam members 305 extend in the front-rear direction. The reinforcing plates 304a and 305a extending along the respective longitudinal directions are inserted and welded to the openings of the rear side beam member 304 and the side beam members 305. [ Therefore, at least the longitudinal middle portion of the rear beam member 304 and each lateral beam member 305 is hollow (cross-sectional rectangular in shape) like the square pipe.

 The left and right end surfaces of the rear beam member 304 are welded and fixed to the upper side surface of the rear support 302 as shown in Figs. 32 (a) and 32 (b). As shown in Figs. 31 (a) and 31 (b), the front end surfaces of the respective side beam members 305 are welded and fixed to the upper side surface of the front strut 301. [ Thus, the left and right end surfaces of the front beam member 303 and the front end surface of one of the right and left side beam members 305 are opposed to each other at the upper end of the front strut 301. The reinforcing brackets 319 having an oblique shape are welded to the inside of the front side beam member 303 and the left and right side beam members 305. The presence of the reinforcing bracket 319 secures the connection strength between the front beam member 303 and the left and right side beam members 305 and the front support column 301.

32 (a) and 32 (b), the rear end surface of each side beam member 305 is welded and fixed to the upper side surface of the rear support 302. Thus, one end surface of the right and left rear beam members 304 and the rear end surface of one of the right and left side beam members 305 are opposed to the upper end side of the rear support 302. The reinforcing brackets 319 having an oblique shape are welded to the inside of the rear beam member 304 and the left and right side beam members 305. [ The presence of the reinforcing bracket 319 ensures the connection strength between the rear beam member 304 and the left and right side beam members 305 and the rear support 302.

30 and 32, the cabin 7 covers the cabin frame 300 constituting the frame. The cabin 7 covers the cabin frame 8 on the running vehicle 2, Wherein at least one frame member (304, 305) of the cabin frame (300) is formed in a C-shape in cross section and extends along the longitudinal direction of the frame members (304, 305) 305 of the frame members 304, 305 are welded and fixed to the openings of the frame members 304, 305, at least the lengthwise middle portion of the frame members 304, 305 is hollow. The rigidity of the frame members 304 and 305, and hence the cabin frame 300, can be improved without using ash, and the cost can be reduced.

Next, details of the anti-vibration support structure on the lower rear side of the cabin 7 will be described with reference to Figs. 22 to 25, Figs. 33A and 33B. The base bracket 327 is attached to the left and right butt portions on the rear lower side of the cabin frame 300 so as to protrude leftward and rightward. In this case, as shown in Figs. 22 to 25 and Figs. 33 (a) and 33 (b), protruded leftward and rightward from the connecting portion (abutting portion) between the left and right rear lower frames 310 and the bottom frame 311 A base bracket 327 is provided. The rear support member 97 on the rear axle case 19 projecting from the transmission case 2 of the traveling vehicle 2 in the left and right outward directions is supported by a base bracket 327). In the embodiment, the lower end face of the rear lower frame 310 is welded to the upper end face of the rear end of the bottom frame 311. A base bracket 327 is previously welded to the rear end side of the bottom frame 311 to form a unit.

The base bracket 327 includes a base plate 328 on which the rear anti-vibration rubber body 99 is suspended, a pair of front and rear support pieces 329 that complement the connection strength between the base plate 328 and the bottom frame 311, (330). The substrate plate 328 is welded and fixed so as to protrude in the right and left outward directions with respect to the rear bottom side of the bottom frame 311. The pair of post members 329 connect the upper surface of the substrate plate 328 and the rear end side of the bottom frame 311. The rear supporting piece 329 blocks the rear opening cross section of the bottom frame 311, which is a hollow pipe (rectangular in cross section). The front support piece 329 supports the rear end side face of the bottom frame 311 with the reinforcing plate piece 330 interposed therebetween. The reinforcing plate pieces 330 are disposed so as to overlap from the side at the butt portion of the rear lower frame 310 and the bottom frame 311. The reinforcing plate piece 330 is formed with an opening hole 330a facing the base portion of the rear lower frame 310 and the bottom frame 311. The presence of the opening hole 330a makes it possible to weld the reinforcing plate piece 330 to a portion of the buttock portion of the rear lower frame 310 and the bottom frame 311 covered by the reinforcing plate piece 330 .

According to the above configuration, after the base bracket 327 with the reinforcing plate piece 330 attached to the bottom frame 311 is previously assembled into a unit, the rear lower frame 310 is welded back to the bottom frame 311 . In addition, in welding and fixing the rear lower frame 310 to the bottom frame 311, the reinforcing plate piece 330 among the butt portions of the bottom frame 311 and the rear lower frame 310, due to the presence of the opening hole 330a, The welding length of the covering portion can be sufficiently secured. It is therefore possible to improve the joining workability of the bottom frame 311 and the rear lower frame 310 and to improve the joint strength of the bottom frame 311 and the rear lower frame 310, Rigidity can be improved.

The base bracket 327 is attached to the right and left butt portions of the rear lower side of the cabin frame 300 so as to protrude in the left and right outward directions and protrudes leftward and rightward from the mission case 17 of the traveling base 2 Since the base bracket 327 is connected to the support base 97 on the rear axle case 19 via the anti-vibration member 99, the rear lower side of the cabin frame 300 can be supported from the left and right sides, The rear lower side of the frame 300 can be connected to the traveling base 2 in a dustproof and stable manner.

Next, the details of the anti-vibration support structure on the rear lower side of the cabin 7 will be described with reference to Figs. 34 and 35. Fig. As described above, a transparent one-piece glass side door 323 is disposed on each of the left and right sides of the cabin 7 (right and left sides of the cabin frame 300) so as to openably close the opening. The side door 323 is attached to the corresponding rear support 302 via a pair of upper and lower hinges 324 so as to be openable and closable. A door lock member 400 for switching the side door 323 between a locked state and a lock released state is provided on the front side of the side door 323. [ The door lock member 400 is locked or unlocked by operating the knob 400a provided on the outer surface side of the door lock member 400 so that the side door 323 is opened and closed. On the inner surface side of the side door 323, a C-shaped reinforcing frame 401 is disposed when viewed from the side where the strength of the side door 323 is increased.

The reinforcing frame 401 has a vertical frame portion 402 extending along the rear edge side of the side door 323 and a lower frame portion 402 extending forward from the upper end side of the vertical frame portion 402 along the upper edge side of the side door 323 And a lower lateral frame portion 404 extending forward so as to divide upper and lower portions of the side door 323 from the lower end side of the vertical frame portion 402. [ The lower transverse frame portion 404 is located at the vertically middle portion of the inner surface of the side door 323 and corresponds to a frame body of a longitudinal length that increases the strength of the side door 323. [ In the embodiment, the reinforcing frame 401 is positioned so as to surround the upper side of the side door 323.

The reinforcing frame 401 is connected to the door lock member 400 and a pair of upper and lower hinges 324. In the embodiment, the front end side of the lower lateral frame portion 404 is connected to the door lock member 400. [ The corner portions of the lower lateral frame portion 404 and the vertical frame portion 402 are connected to the front end side of the lower hinge 324 and the upper end side of the vertical frame portion 402 is connected to the upper hinge 324. [ That is, the side door 323 is sandwiched by the door lock member 400 and the upper and lower pairs of hinges 324 and the reinforcing frame 401. The front end side of the upper horizontal frame portion 403 is directly connected to the upper front portion of the side door 323. The lower hinge 324 and the fender frame 312 are connected to each other via an air cylinder 405.

The door lock member 400 is moved in the direction of unlocking by hand to the front and rear intermediate portions of the lower lateral frame portion 404, that is, the portion of the lower lateral frame portion 404, A grip body 406 for switching operation is provided. The grip body 406 is linked to the door lock member 400 through a wire member embedded in the lower lateral frame portion 404, although not shown in detail. For example, when the lower transverse frame part 404 is gripped by the grip body 406, the door lock member 400 is operated to switch in the unlock direction through the wire member. As a result, the door lock member 400 is unlocked. The operator can unlock the door lock member 400 only by a very simple operation of gripping the grip body 406, for example, the lower lateral frame portion 404 while sitting on the steering seat 8. [ When the side door 323 is pressed as it is, the side door 323 smoothly opens.

34 and 35, the cabin 7 covers the steering seat 8 on the running vehicle 2. The cabin 7 is a cabin frame 300 which constitutes the frame, And a side door (323) that closes left and right portions of the cabin (7) so as to be openable and closable, wherein a side surface (323) of the side door (323) A reinforcing frame 401 having a C shape is disposed in the longitudinal frame part 402. The reinforcing frame 401 includes a longitudinal frame part 402 extending along the rear edge side of the side door 323, An upper horizontal frame portion 403 extending forward from the upper end side of the side door 323 along the upper edge side of the side door 323 and a lower horizontal frame portion 403 extending upward and downward from the lower end side of the vertical frame portion 402 The lower side extending forward to divide Because it has a frame portion 404, wherein the reinforcing frame (401) so as to surround the upper side of the side door 323 is positioned. The reinforcing frame 401 is used as a strength member of the side door 323 itself while securing a clock on the side of the cabin 7 so that the stiffness of the side door 323, Improvement is achieved. Further, the lower lateral frame portion 404 can be used as a railing when the cabin 7 is lifted and lowered.

A door lock member 400 for switching the side door 323 to a locked state and a unlocked state and a pair of upper and lower hinges 324 for connecting the side door 323 to the cabin frame 300 for opening and closing The side door 323 can be sandwiched by the door lock member 400 and the upper and lower pairs of hinges 324 and the reinforcing frame 401, The reinforcing frame 401 can be connected to the door 323 easily and with high strength. Therefore, the assembly work of the side door 323 can be facilitated and the manufacturing cost can be reduced.

34 and 35, the cabin 7 covers the steering seat 8 on the running vehicle 2. The cabin 7 is a cabin frame 300 which constitutes the frame, And a side door (323) that closes left and right portions of the cabin (7) so as to be openable and closable, characterized in that the side door (323) A frame body 404 having a longitudinal length for improving the strength of the side door 323 is disposed on the upper and lower portions of the inner surface of the side door 323, The door lock member 400 is connected to the front end side of the steering lock member 404 and the door lock member 400 is fixed by hand to a portion of the frame body 404, A grip body 406 for performing switching operation in the lock release direction, The operator unlocks the door lock member 400 with only a very simple operation of holding the grip body 406 for the frame body 404 while sitting on the steering seat 8 And the opening operability of the side door 323 can be improved.

Next, a detailed structure of the hinge 324 for rotatably supporting the side door 323 will be described with reference to Figs. 36 and 37. Fig. The upper and lower angled hinges 324 that openably and closably connect the side door 323 to the rear support 302 of the cabin frame 300 include a hinge stay 408 provided on the rear support 302 and a hinge stay 408 And a hinge cover 409 which pivotally rotatably pivots on the hinge cover 409. And the front half of the hinge cover 409 is bolted to the rear edge side of the side door 323. The hinge stay 408 includes a flat plate portion 408a projecting from the rear support 302 and a pivoting portion 408b formed on the front end side of the flat plate portion 408a. A stopper bolt 410 as a stopper member for restricting the maximum opening angle of the side door 323 is attached to the flat plate portion 408a of the hinge stay 408 in contact with the rear side of the inner surface of the hinge cover 409. [ The stopper bolt 410 is provided with a metal contact plate 411 on the rear side of the inner surface of the hinge cover 409. The state in which the head portion or the front end portion of the stopper bolt 410 is brought into contact with the contact plate 411 of the hinge cover 409 by opening the side door 323 becomes the maximum opening angle of the side door 323. [ The contact position between the contact plate 411 of the hinge cover 490 and the stopper bolt 410 is changed by adjusting the amount of screw insertion of the stopper bolt 410 so that the maximum opening angle of the side door 323 is adjusted.

36 and 37, the cabin 7 covers the steering seat 8 on the running vehicle 2. The cabin 7 is a cabin frame 300 which constitutes the frame, And a side door (323) for closing the left and right side portions of the cabin (7) so as to open and close the cabin (7), characterized in that the cabin frame (300) And the hinge 324 has a hinge stay 408 provided on the cabin frame 300 and a hinge cover 409 pivotally pivotable on the hinge stay 408, The hinge stay 408 is provided with a stopper member 410 which contacts the inner surface of the hinge cover 409 and restricts the maximum opening angle of the side door 323, Only the simple structure using the stopper member 410 Id it is possible to achieve the maximum opening angle control of the door (323). Therefore, the structure for regulating the maximum opening angle of the side door 323 can be manufactured at low cost, and cost reduction can be achieved.

The stopper member 410 is a stopper bolt that screws the hinge stay 408 and adjusts a screw insertion amount of the stopper bolt 410 to change the contact position with the hinge cover 409, Since the maximum opening angle of the door 323 is adjusted, the adjustment of the maximum opening angle of the side door 323 can be performed very simply.

Next, a structure for switching the open / close position of the rear glass 322 as an opening / closing window in a plurality of steps will be described with reference to Figs. 38 to 41. Fig. On the rear side of the cabin 7 (the rear side of the cabin frame 300), a transparent rear glass 322 made of transparent glass is disposed so as to open and close the cabin 7 as described above. The rear glass 322 is attached to the rear side beam member 304 via a pair of right and left hinges 413 so as to be openable / closable (lifting-up rotatable). A locked block 414 as a locked portion for determining the opening and closing positions of the rear glass 322 is bolted to the left and right central portions of the upper surface of the rear intermediate beam member 309 among the cabin frames 300. The locked block 414 is formed in a U-shape when viewed from a plane opened toward one of the rear supports 302.

A rotatable handle 415 is attached to the free end side of the inner surface of the rear glass 322. The rotary type handle 415 includes a handle base portion 416 fastened to the free end side of the inner surface of the rear glass 322, a rotary shaft portion 417 projecting forward from the handle base portion 416, a rotary shaft portion 417, And a handle portion 418 projecting in a direction intersecting with the direction of the arrow. The pivot shaft portion 417 is formed with a plurality of downward protruding engagement protrusions 420a and 420b which are positioned at appropriate intervals in the longitudinal direction thereof. The opening and closing positions of the rear glass 322 including the full closing position by the combination of the engaging projections 420a and the locking blocks 414 are two As shown in FIG.

That is, in a state in which the first engagement protrusions 420a on the rear end side of the pivot shaft portion 417 are in contact with the inner side front side surface 414a of the inside of the cabin 7 of the locked block 414, The side portion is closed by the rear glass 322 (the rear glass 322 becomes the full closing position). The rear glass 322 is at least a half distance position slightly away from the rear side of the cabin 7 in a state where the first engaging protrusion 420a is fitted into the concave recess 414b of the locked block 414. [ The rear glass 322 is brought into contact with the front surface 414a of the locked block 414 so that the rear engaging protrusion 420b on the front end side of the rotating shaft 417 is in contact with the rear engaging protrusion 420b of the cabin 7 It is in the middle half position away from the rear side. The rear glass 322 becomes the maximum opening position that is the farthest from the rear side of the cabin 7 in a state where the second engaging projection 420b is fitted in the recess 414b of the locked block 414. [ The opening / closing window is not limited to the rear glass 322. The opening / closing window is not limited to the lifting up pivoting type, and may be a vertical pivoting type or a horizontal pivoting type.

On the upper side of the outer surface of the rear glass 322, a wiper 421 for cleaning the rear glass 322 is provided (see FIG. 38). On the other hand, a wiper drive case 422 accommodating a wiper motor (not shown) for driving the wiper 421 is mounted on the inner surface of the rear glass (see Fig. 39). Since the wiper 421 protrudes outward from the upper side of the outer surface of the rear glass 322, when the rear glass cover 323 is largely lifted up to the rear cover 363 of the roof body 306, the wiper 421 Is prevented from interfering with the rear cover (see Fig. 29). As shown in Fig. 38, a reflection plate 427 is provided on the fixing bracket 424 attached to the left side of the rear glass 322. Fig. The right bracket 424 and the left rear bracket 302 are connected via a damper body 425 such as an air cylinder and the right side portion and the rear side bracket 302 of the rear glass 322 are connected to each other by an air cylinder And is connected via a damper body 426 (see Fig. 39).

38 to 41, the cabin 7 includes a cabin frame 300 which constitutes a frame, and a cabin 7 which covers the cabin 7 on the cabin 7, The work vehicle (1) has a rotatable opening / closing window (322) for closing one side of the cabin (7) so as to be able to open and close. In the cabin frame (300) The locking portion 414 is attached to the locking portion 414 and the rotatable handle 415 provided on the free end side of the opening and closing window 322 is selectively attached to the locking portion 414 by the turning operation of the rotatable handle 415 It is possible to switch the open / close position of the opening / closing window 322 to a plurality of stages by only a very simple (one-touch operation) operation of rotating the pivoting handle 415 because a plurality of engaging projections 420a, Closing operation for opening or closing the opening / closing window 322 And can be easily performed.

In addition, the configuration of each part in the present invention is not limited to the illustrated embodiment, and various modifications are possible within the scope of the present invention.

1: tractor 2: running vehicle
3: front wheel 4: rear wheel
7: Cabin 8: Pilot seat
300: cabin frame 301: front seat
302: rear support 303: front side beam member
304: rear side beam member 304a, 305a: reinforcing plate
305: side beam member 327: base bracket
330: reinforcing plate piece 330a: opening hole
400: door lock member 401: reinforcing frame
406: Grip body 408: Hinge stay
409: Hinge cover 410: Stopper bolt
414: Locked block 415: Rotary handle
420a: first engaging projection 420b: second engaging projection

Claims (5)

1. A working vehicle having a cabin for covering a steering seat on a traveling vehicle, the cabin having a cabin frame constituting a frame and a side door for closing the left and right portions of the cabin so as to be able to open and close,
A reinforcing frame having a C shape is arranged on the inner surface side of the side door when viewed from a side for increasing the strength of the side door, the reinforcing frame including a vertical frame portion extending along the rear edge side of the side door, An upper horizontal frame portion extending forwardly from the upper end side of the side door toward the upper edge side of the side door and a lower side horizontal frame portion extending forward to partition the upper and lower sides of the side door from the lower end side of the vertical frame portion, . The method according to claim 1,
A door lock member for switching the side door to a locked state and a lock released state; and a reinforcing frame connected to upper and lower pairs of hinges for opening and closing the side door with respect to the cabin frame. 3. The method of claim 2,
And a grip body for switching operation of the door lock member in the unlocking direction by means of a hand on a portion of the lower side horizontal frame portion which is seated by the operator sitting on the steering seat. 4. The method according to any one of claims 1 to 3,
And a hinge which opens and closes the side door with respect to the cabin frame. The hinge includes a hinge stay provided on the cabin frame and a hinge cover pivotally rotatable on the hinge stay,
Wherein the hinge stay is provided with a stopper member which comes into contact with the inner surface side of the hinge cover and restricts the maximum opening angle of the side door. 5. The method of claim 4,
Wherein the stopper member is a stopper bolt that screws into the hinge stay and adjusts the maximum opening angle of the side door by changing a contact position with the hinge cover by adjusting a screw insertion amount of the stopper bolt.

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