Abstract: An overhead traveling crane system has cylindrical guide members (16d, 18d) and guide bars (15a, 16a) installed on a moving device (18) and a lifting device (15), respectively. The guide bars (15a, 16a) are inserted nestably into the cylindrical guide members (16d, 18d) so [as to move] that the lifting device (15) can be raised and lowered by wires only substantially vertically relative to the moving device (18) when wires (15b, 16b) are wound up and down. The lower end parts of the cylindrical guide members (16d, 18d) are expanded in a flared shape so that the upper end parts of the guide bars (15a, 16a) can be moved minutely horizontally in the period between the start of engagement and the completion of engagement. Similarly, a flared position guide means may be provided on a lower part of the lifting device for engagement with positioning means located on the target on the ground.

Abstract: An overhead traveling crane system, wherein at least two locking members (25a) are mounted vertically slidably on a lifting device (15), a stopper (25b) and a contact member are fixed to the upper and lower end parts of each locking member (25a), respectively. A non-contact sensing device is fixed to the underside of the lifting device (15), and a sensor element (27) is fixed to the locking members (25a). The lowering of the locking members (25a) is stopped when the contact means is brought into contact with a reference position, and the lowering of the lifting device (15) is stopped when the lifting device (15) is lowered further so as to move the sensing device on the lifting device (15) side closely to the sensor element on the locking members (25a). Even though a general-purpose overhead traveling crane is used, the vertical positioning accuracy of the lifting device installed on the overhead traveling crane is increased.

Abstract: Multi-purpose in-line direct heat treating equipment for hot-rolled steel wire rod has, in combination, a front stage transport conveyor portion and a holding furnace both positioned on a front traveling skid carriage, a quenching tank and a holding tank both positioned on a rear traveling skid carriage, each of the traveling skid carriages being able to travel in direction transverse to the direction of conveying of the hot-rolled steel wire rod emerging from a hot rolling mill for the purpose of direct heat treating the wire rod by taking advantage of the heat retained in the wire rod.