Jib crane is designed to adapt to the modern production of a new generation of light lifting equipment, with high reliability of the electric chain hoist is especially suitable for short distance, frequent use, intensive lifting operation, high efficiency, energy saving, convenient, small footprint, easy operation and maintenance etc. movable cantilever hanging is more flexible, wide adaptability, high efficiency automatic production line must separate emergency lifting equipment, it can ensure the production line smoothly. The wall jib crane is a new material developed in the foundation wall column cantilever crane on the lifting equipment. The machine running rail is installed on the cement column Workshop on the longitudinal motion along the rail to do at the same time, the lifting electric hoist can finish the selection of cantilever along the vertical and horizontal movement of the machine greatly expands the scope of work, have more Effective use of the workshop space, the use effect is more ideal. Longmen crane from the weight up to 2000 kg, usually by hanging crane is not possible or economic place can be convenient to use. Longmen crane can be simply a few easy transport part is split, can be assembled quickly in another the place, this characteristic is beneficial in many occasions. I-beam trackless crane weight up to 2000 kg. The crank arm series cantilever crane has the advantages of novel structure, flex freely, convenient operation, high efficiency and energy saving. During the operation, press the button to lift the load, the bending and rotational motion of beam in the work area, avoid the control object, the maximum work area. Gently push and pull, can reach any position in the working area.