A transport system including a plurality of transport vehicles is provided. Each of the plurality of transport vehicles includes: a distance detecting portion configured to detect a distance D to a preceding transport vehicle, which is another transport vehicle traveling in front of the corresponding transport vehicle; a signal transmitting portion capable of transmitting a start signal to a subsequent transport vehicle, which is another transport vehicle traveling behind the corresponding transport vehicle; and a signal receiving portion capable of receiving the start signal that is transmitted from the preceding transport vehicle. Each of the plurality of transport vehicles is configured to transmit, when starting to travel, the start signal using the signal transmitting portion, to start to travel upon receiving the start signal from the preceding transport vehicle using the signal receiving portion, and to stop when the distance D to the preceding transport vehicle that is detected by the distance detecting portion is equal to or smaller than a set distance TH1.

The lifting device according to the invention comprises a carriage (16) and a lifting unit (17), which are connected to each other by means of linear guides (29, 30). The carriage (16) comprises two side parts (19, 20) that can be adjusted in view of their distance relative to each other by means of a distance adjustment device (36). In doing so, they are centered by means of a centering device (45) with respect to the lifting unit (17), in particular with respect to the pulling means originating from the lifting unit (17).

The lifting device according to the invention comprises a carriage (16) and a lifting unit (17), which are connected to each other by means of linear guides (29, 30). The carriage (16) comprises two side parts (19, 20) that can be adjusted in view of their distance relative to each other by means of a distance adjustment device (36). In doing so, they are centered by means of a centering device (45) with respect to the lifting unit (17), in particular with respect to the pulling means originating from the lifting unit (17).

A system and method for construction of a framed structure which permits on-site storage and relocation of construction materials using trolleys and cranes supported by the framed structure. The system provides a runway surface for removable attachment of trolleys, crane bridges, and platforms by offsetting the first longitudinal beam and a second longitudinal beam from a cross beam and where the first longitudinal beam, second longitudinal beam, and cross beam of the system provide components for the framed structure.

Motorized carriage (1) that is able to move in translation along a longitudinal axis (X) along a horizontal rail, said carriage (1) comprising at least one wheel (4), in particular of the friction wheel type, that is driven in rotation by an electric motor (5) and is mounted so as to pivot about a transverse axis (Y) on a holder (3) which carries said motor (5), said carriage (1) comprising a chassis (2) incorporating guide means (23, 24) mounted so as to slide on the chassis (2) along a vertical axis (Z) orthogonal to the longitudinal axis (X) and transverse axis (Y) and cooperating with elastic stressing means (25, 26) that are designed to move the guide means (23, 24) in the direction of the rail, where the holder (3) is in sliding contact with said guide means (23, 24) along the longitudinal axis (X) and vertical axis (Z), this sliding contact being designed to convert a movement of the holder (3) along the longitudinal axis (X) into a concurrent movement of the holder (3) along the vertical axis (Z) in the direction of the rail. Said carriage (1) can be used in video surveillance systems.

A low-construction trolley for a wire rope hoist is arranged to travel along a lower flange of a horizontal rail, on both longitudinal edges thereof The trolley includes a trolley frame; bearing wheels that are attached to the trolley frame and arranged to travel on an upper surface of the lower flange of the rail; a hoisting mechanism including a rope drum for a hoisting rope, a hoisting member in cooperation with the hoisting rope for hoisting a load, a hoisting motor for driving the rope drum, and a gear to interconnect the hoisting motor and the rope drum; whereby the rope drum is supported to one side of the trolley frame and the hoisting member is arranged to travel under the rail in a vertical plane (A) passing substantially through the middle of the beam. For balancing the trolley without using a counterweight, the hoisting motor is placed under the rail and at least partly on a different side than the rope drum in relation to a vertical plane (B) passing through contact lines of the bearing wheels that touch the lower flange of the rail on the rope drum side.

Disclosed is a system or kit for forming an assembly comprising a rail trolley engageable with a rail to be moveable therealong, the system or kit comprising: at least one portion which a body of the trolley is to comprise (body portion), the body portion(s) being configured to define at least one slot in said body; and one or more wheels connectable or connected to at least one said body portion, or connectable to said body, the system or kit including at least one component connectable to the body through at least one said slot in the body and/or in one or more said body portions, or connected to at least one said body portion through at least one said slot therein, such that the position of a resulting interconnection between the/each component and the body in the assembly is variable along the slot(s) through which that component is connected.