A method of assembling a tower section of a wind turbine tower is provided. The method includes arranging the tower section of the wind turbine tower in a horizontal orientation; transporting a damper unit to a position inside the tower section while the tower section is arranged in the horizontal orientation; and mounting the damper unit to the tower section, wherein the damper unit is configured to damp motions of the wind turbine tower. Further, a horizontal transport system is provided that is supported at least at one position by the tower section and that includes a movable part configured to support a damper unit and to transport the damper unit in a horizontal direction from a position adjacent to an end of the tower section to a position at or adjacent to a mounting position of the damper unit inside the tower section.

The zip line rail system can be connected to a challenge course, a zip line, a zip track system, or any combination thereof. The zip line rail system of the present invention can have two rails that a member slide's two wheels rollably engage with, and the zip line rail system can be configured in any of a variety of directions.

The zip line rail system can be connected to a challenge course, a zip line, a zip track system, or any combination thereof. The zip line rail system of the present invention can have two rails that a member slide's two wheels rollably engage with, and the zip line rail system can be configured in any of a variety of directions.

An overhead transport vehicle includes a fall prevention mechanism including a first rotary member, a fall prevention member, and a second rotary member. The first rotary member includes a base end portion supported so as to be rotatable about a first rotation shaft extending along direction Y. The fall prevention member is provided in a tip end portion of the first rotary member and is movable to a space below a cassette. The second rotary member includes a base end portion supported so as to be rotatable about a second rotation shaft extending along direction Z, and a tip end portion to which the first rotary member is attached.

An overhead transport vehicle includes a fall prevention mechanism including a first rotary member, a fall prevention member, and a second rotary member. The first rotary member includes a base end portion supported so as to be rotatable about a first rotation shaft extending along direction Y. The fall prevention member is provided in a tip end portion of the first rotary member and is movable to a space below a cassette. The second rotary member includes a base end portion supported so as to be rotatable about a second rotation shaft extending along direction Z, and a tip end portion to which the first rotary member is attached.

A stop for stopping a trolley on a rail is described. The trolley comprises a set of wheels, including a first wheel and the rail provides, at least in part, a running surface, including a first portion and a second portion thereof, for the first wheel. The stop comprises an actuator providing a third portion of the running surface between the first portion and the second portion and an arm, coupled to the actuator. The stop is arrangeable in a first configuration, wherein the arm is arranged to block the trolley therepast. The stop is arrangeable in a second configuration, wherein the arm is arranged to allow the trolley therepast. The stop is arranged to move from the first configuration to the second configuration by actuation of the actuator, preferably by a movement of the actuator in a direction transverse to the third portion of the running surface.

A cable car system has vehicles which are coupled to a conveying cable between stations. The vehicles are decoupled from the conveying cable in the stations and are moved through the stations along guide rails. The vehicles are formed with current collectors and the stations have associated power rails. In at least one of the vehicles there is located a circuit with at least one electrical load which is supplied with electrical energy via the current collector and the power rails. At least one second circuit with at least one further electrical load is located in at least one vehicle. The second circuit is supplied with electrical energy via a single further current collector and a power rail assigned thereto. The two circuits are connected to a common current collector to which a single power rail is assigned.

An overhead guide track system for automated material handling and storage facilities wherein at least one transfer unit is suspended from carriages that travel along the track system, the track system including a plurality of first and second support beams being assembled in an X-Y manner such that the first and second support beams intersect with one another in perpendicular relationship and wherein each of the first and second support beams includes a horizontal flange connected to a central vertical web, each of the vertical webs of the first and second beams having opposite ends connected to vertically oriented pedestals at a plurality of intersections of the first and second support beams and which pedestals support transfer plates over which the carriages are supported as the carriages pass over open gaps between the horizontal flanges at the intersections of the first and second support beams.

An overhead guide track system for automated material handling and storage facilities wherein at least one transfer unit is suspended from carriages that travel along the track system, the track system including a plurality of first and second support beams being assembled in an X-Y manner such that the first and second support beams intersect with one another in perpendicular relationship and wherein each of the first and second support beams includes a horizontal flange connected to a central vertical web, each of the vertical webs of the first and second beams having opposite ends connected to vertically oriented pedestals at a plurality of intersections of the first and second support beams and which pedestals support transfer plates over which the carriages are supported as the carriages pass over open gaps between the horizontal flanges at the intersections of the first and second support beams.

A carriage for a rail-guided conveying system, in particular a gravity conveyor, in which a plurality of similar carriages are mounted one behind the other in the rail-longitudinal direction and displaceable in the rail-longitudinal direction, on a running rail extending in the rail-longitudinal direction. A first and a second set of upright rollers are arranged one behind the other for guiding the running rail in the rail-longitudinal direction and which in each case are rotatably mounted on a carriage body transversely to the rail-longitudinal direction about an associated axis and are spaced apart from one another along the associated axis.