A method for steering a gantry crane having wheel assemblies includes the steps of: initiating movement of the gantry crane; and rotating the wheel assemblies wherein the front wheel assemblies rotate in a first rotational direction and the rear wheel assemblies rotate in a second rotational direction. The first rotational direction is opposite to the second rotational direction. First side wheel assemblies rotate at a first rotational speed and second side wheel assemblies rotate at a second rotational speed, such that the gantry crane moves from a linear path to an arcuate path with a turning radius decreasing to substantially zero for rotation about a central axis.

Object is to provide a travel facility in which a travel member, that became incapable of traveling due to a cause other than a power supply failure, can be moved to another location on a travel path. A second travel member, provided separately from the first travel member, includes an external signal generating portion for generating an external travel control signal to be sent to a first travel actuator and a connecting portion which can transmit the external travel control signal. The first travel member includes a first connecting portion which can receive the external travel control signal and can transmit the external control signal to the first travel actuator. A connecting member for receiving and transmitting the external travel control signal is removably connected to, and between, the first connecting portion and the second connecting portion.

Object is to provide a travel facility in which a travel member, that became incapable of traveling due to a cause other than a power supply failure, can be moved to another location on a travel path. A second travel member, provided separately from the first travel member, includes an external signal generating portion for generating an external travel control signal to be sent to a first travel actuator and a connecting portion which can transmit the external travel control signal. The first travel member includes a first connecting portion which can receive the external travel control signal and can transmit the external control signal to the first travel actuator. A connecting member for receiving and transmitting the external travel control signal is removably connected to, and between, the first connecting portion and the second connecting portion.

A transport vehicle travels on first and second paths orthogonally or diagonally crossing each other and each including an opening at a center and treads on both sides of the opening. The transport vehicle includes a vehicle in an upper portion; a transport in a lower portion to hold an article; and a column extending downward from the vehicle to the transport. The vehicle includes on front and rear of the column along the first path, at least a pair of first traveling units each including a first traveling wheel that travels on the tread of the first path, and first auxiliary wheels on front and rear of the first traveling wheel along the first path; on front and rear of the column along the second path, at least a pair of second traveling units each including a second traveling wheel that travels on the tread of the second path, and second auxiliary wheels on front and rear of the second traveling wheel along the second path; and a lifting mechanism that raises and lowers one of the at least the pair of first traveling units and the at least the pair of second traveling units.

A transport vehicle travels on first and second paths orthogonally or diagonally crossing each other and each including an opening at a center and treads on both sides of the opening. The transport vehicle includes a vehicle in an upper portion; a transport in a lower portion to hold an article; and a column extending downward from the vehicle to the transport. The vehicle includes on front and rear of the column along the first path, at least a pair of first traveling units each including a first traveling wheel that travels on the tread of the first path, and first auxiliary wheels on front and rear of the first traveling wheel along the first path; on front and rear of the column along the second path, at least a pair of second traveling units each including a second traveling wheel that travels on the tread of the second path, and second auxiliary wheels on front and rear of the second traveling wheel along the second path; and a lifting mechanism that raises and lowers one of the at least the pair of first traveling units and the at least the pair of second traveling units.

A traveling vehicle system includes a track including a first gap, a partial track, and a second gap, a traveling vehicle including a drive wheel and first and second auxiliary wheels, a first auxiliary track on a near side of the first gap in a traveling direction and in contact with a lower end of the first auxiliary wheel while a lower end of the drive wheel passes through the first gap when the drive wheel enters the partial track, and a second auxiliary track on a far side of the second gap in the traveling direction and in contact with a lower end of the second auxiliary wheel while the lower end of the drive wheel passes through the second gap when the drive wheel leaves the partial track.

A traveling vehicle system includes a track including a first gap, a partial track, and a second gap, a traveling vehicle including a drive wheel and first and second auxiliary wheels, a first auxiliary track on a near side of the first gap in a traveling direction and in contact with a lower end of the first auxiliary wheel while a lower end of the drive wheel passes through the first gap when the drive wheel enters the partial track, and a second auxiliary track on a far side of the second gap in the traveling direction and in contact with a lower end of the second auxiliary wheel while the lower end of the drive wheel passes through the second gap when the drive wheel leaves the partial track.

A lifting and transporting device for lifting a load and transporting the same transversely to the lifting direction. The lifting and transporting device being for use in manufacturing a screwed flange connection. The lifting and transporting device having a frame for picking up and lifting a load, a holder for holding the load and comprising a hoist for lifting and lowering the holder with the load attached thereto, includes a tensile anchor which is operatively connected with the bolting tool and in a state of the lifting and transporting device mounted on a flange can releasably be connected with the flange or with at least one screw bolt connection and is designed to limit the lift-off path of the bolting tool in the hoisting direction to a specified amount in the case of a fracture of the screw bolt connection to be pretensioned or of the connection of the bolting tool with the screw bolt connection to be pretensioned during the pretensioning of this screw bolt connection.

A lifting and transporting device for lifting a load and transporting the same transversely to the lifting direction. The lifting and transporting device being for use in manufacturing a screwed flange connection. The lifting and transporting device having a frame for picking up and lifting a load, a holder for holding the load and comprising a hoist for lifting and lowering the holder with the load attached thereto, includes a tensile anchor which is operatively connected with the bolting tool and in a state of the lifting and transporting device mounted on a flange can releasably be connected with the flange or with at least one screw bolt connection and is designed to limit the lift-off path of the bolting tool in the hoisting direction to a specified amount in the case of a fracture of the screw bolt connection to be pretensioned or of the connection of the bolting tool with the screw bolt connection to be pretensioned during the pretensioning of this screw bolt connection.

A lifting and transporting device for lifting a load and transporting the same transversely to the lifting direction. The lifting and transporting device being for use in manufacturing a screwed flange connection. The lifting and transporting device having a frame for picking up and lifting a load, a holder for holding the load and comprising a hoist for lifting and lowering the holder with the load attached thereto, includes a tensile anchor which is operatively connected with the bolting tool and in a state of the lifting and transporting device mounted on a flange can releasably be connected with the flange or with at least one screw bolt connection and is designed to limit the lift-off path of the bolting tool in the hoisting direction to a specified amount in the case of a fracture of the screw bolt connection to be pretensioned or of the connection of the bolting tool with the screw bolt connection to be pretensioned during the pretensioning of this screw bolt connection.