Patent ID: 7252585

Claim:
A work-vehicle cabin having an air-conditioning unit, comprising: a roof unit, wherein said roof unit includes an inner roof portion located on the under side and an outer roof portion located on the outer side of the inner roof portion, the roof unit includes on a lateral side thereof a lateral air-supply opening for feeding the conditioned air to the inside of the cabin and a lateral air-conditioning duct for guiding the conditioned air to the lateral air-supply opening bound between the inner roof portion and the outer roof portion; a downwardly bulging ceiling portion constituting a part of the roof unit; a heater provided in the ceiling portion; an evaporator provided in the ceiling portion and arranged adjacently rearwardly of the heater; and a pair of forward air-supply openings provided in the ceiling portion and respectively disposed laterally of the heater for feeding conditioned air to the inside of the cabin, wherein forwardly of the lateral air-conditioning duct, there is provided a forward air-conditioning duct for guiding the conditioned air from the air-conditioning unit, a feeding portion of the forward air-conditioning duct and a forward receiving portion of the lateral air-conditioning duct are respectively formed as cylindrical portions, a cutout is formed at a leading end of a large-diameter one of the cylindrical portions of the feeding portion of the forward air-conditioning duct and the forward receiving portion of the lateral air-conditioning duct, the small-diameter one of the cylindrical portions of the feeding portion of the forward air-conditioning duct and the forward receiving portion of the lateral air-conditioning duct is inserted and engaged into the other large-diameter cylindrical portion, and a cover member for covering said cutout fixes said feeding portion or said forward introducing portion acting as said large-diameter cylindrical portion under said inserted engaged condition.