Trolley and line system for moving objects

摘要

A trolley for lifting and/or moving a load on one or more lines is disclosed. The trolley comprises: a. first and second spaced plates (10, 12), b. at least two fixed sheaves (30) that are disposed for rotation about respective parallel axes between the first and second plates (10, 12), and c. a removable sheave component (48). The removable sheave component (48) is, while in use, disposed for rotation about an axis parallel to that of the fixed sheaves between or adjacent to the first and second plates (10, 12). The removable sheave components is, while in use, carried on a shaft (24) that is connected to the plates, which connection is capable of being disconnected to permit removal of the removable sheave components from connection with the plates. Also disclosed is an installation for lifting and/or moving a load that includes such a trolley and a method of installing such an installation.