The invention relates to an arrangement for attaching a switch control shaft to a switch pipe shaft, where the control shaft is mounted partly in the switch pipe shaft and tightened to the switch pipe shaft by a screw. The fungicidal solution is comprised of between about one-third to two-third cup of an organic plant matter to every two-third gallon of a fermented solution. The roof RF 20 and the pillar RF 30 are connected to each other so that an end 22a of a lower side wall 22 of the roof RF 20 abuts an end 32a of the outer side wall 32 of the pillar RF 30 in the front-to-rear direction of the car body and an end 23a of an upper side wall 23 of the roof RF 20 overlaps an end 33a of an inner side wall 33 of the pillar RF 30.