Working vehicle

1. A working vehicle comprising:

a travelling machine body;

a steering seat on the travelling machine body;

an engine on the travelling machine body;

a cabin covering the steering seat and comprising a cabin frame constituting a framework of the cabin, and a roof assembly disposed on an upper end of the cabin frame and comprising a front-side chamber and a rear-side chamber that are partitioned inside the roof assembly by an inner roof and a rear cover;

wherein the cabin frame comprises a pair of left and right front support pillars, a pair of left and right rear support pillars, a front beam coupling upper end portions of the front support pillars, a rear beam coupling upper end portions of the rear support beams, and side beams coupling the upper end portions of the front support pillars and the rear support pillars, which are arranged in a front and rear direction, and wherein

a side door is openably/closably secured to one of the rear support pillars via a pair of upper and lower hinges, and

the roof assembly includes an outer roof as an exterior, the inner roof forming a ceiling of the cabin, and the rear cover which is connected to the rear beam and which protrudes rearward from the rear beam, the working vehicle further comprising an air conditioner inside the rear-side chamber, wherein the rear-side is a rear cover side, and wherein

a tailpipe disposed on one side among a left side and a right side of the travelling machine body extends along one of the front support pillars and is configured to allow exhaust gas from the engine to be discharged to an outside of the working vehicle through the tailpipe; and

an external-air intake opening disposed at a location proximate to the rear cover on one side opposite the tailpipe among a left side and a right side of the outer roof is formed on a ventilation frame assembly, and is configured to bring the rear-side chamber into communication with the outside of the working vehicle.

2. The working vehicle according to claim 1 ,

wherein the rear-side chamber of the roof assembly is disposed so as to protrude from the rear beam, and is supported by the rear beam, and

wherein a rear upper-side working light is attached to a support stay disposed on an upper end side of each of the left and right rear support pillars.

3. The working vehicle according to claim 1 , wherein at least one support stay to each of which at least one light fitment is attached is disposed on the cabin frame.

4. The working vehicle according to claim 3 ,

wherein the at least one support stay comprises a plurality of support stays, and the at least one light fitment comprises a plurality of light fitments,

wherein a first one of the plurality of support stays is disposed on an upper-lower direction intermediate portion of each of the front support pillars, and a front composite light and a front intermediate-side working light that serve as light fitments among the plurality of light fitments are attached to the first one of the plurality of support stays, and

wherein a second one of the plurality of support stays is disposed on a lower portion of each of the rear support pillars, and a rear composite light and a rear lower-side working light that serve as light fitments among the plurality of light fitments are attached to the second one of the plurality of support stays.

5. The working vehicle according to claim 1 ,

wherein a pair of left and right first support stays are each disposed on a corresponding one of long-length direction intermediate portions of the front beam, and front upper-side working lights are each attached to a corresponding one of the left and right first support stays, and

wherein second support stays are disposed on an upper end portion of a corresponding one of the rear support pillars, and rear upper-side working lights are each attached to a corresponding one of the second support stays.

6. The working vehicle according to claim 5 , wherein the front upper-side working lights are located so as to overlap the front beam in a front view.

7. The working vehicle according to claim 1 , wherein the external-air intake opening is positioned above the side door and at a position which is on an opposite corner of the cabin as the tailpipe when the cabin is viewed in plan view.