The ice spike for mountaineering is composed of a front frame and a rear frame joined to one another by a joining strip which comprises two parallel rows of holes spaced at regular intervals. During cleaning stages between operational stages, a cleaning substance is forced through the feed line. Further, a remaining amount indicating member moved with the upward movement of the sheet stacking portion to indicate the remaining amount of sheets is held at a position before the sheet stacking portion is moved down, by a holding mechanism, when the sheet feeding operation is completed and the sheet stacking portion is moved down. The vertical acceleration signal is processed to determine an inclination angle of the vehicle.