Jib Crane


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jib crane

[′jib ‚krān]
(mechanical engineering)
Any of various cranes having a projecting arm (jib).

Jib Crane

 

a hoisting crane of the bridge variety, in which a telpher moves along a drive beam.

The running wheels of the beam rest on rails, which are usually set on the upper racks of subcrane beams, situated under the ceiling of an installation, covered platform, or construction area. In certain structures the running wheels rest on lower racks of subcrane H-beams. Jib cranes of such a design are called suspended or rolling. Jib cranes are single-span (width of a span is 6-15 m) and multispan (up to 100 m). Jib crane mechanisms are activated by electric motors running on a power network (overhead wire or cable). The mechanisms are controlled by an operator in a cabin perched on the drive beam or from the floor of the installation by means of a push-button console connected by cable with the jib crane mechanisms. The lifting capacity of jib cranes is generally 1-5 tons.

Jib cranes (cat davits) on ships are very basic hoisting and sluing cranes for the lifting and lowering of main (bow) anchors. They are shaped in the form of a curved beam with a pulley at the end or jibs with struts. The anchor is lifted manually or by means of a windlass. One jib crane is positioned on the forecastle and two along the sides of the forecastle. On wooden sailing ships the role of the jib crane is assumed by two stationary wooden outriggers (beams on the bilges of the forecastle), referred to as catheads.

E. I. RIDEL

jib crane

A crane having a swinging boom.
References in periodicals archive ?
Raimondi Cranes is taking a transformative approach to heavy lifting technology with a new generation of luffing jib cranes, entirely different from it existing products.
Showcased to Raimondi's exclusive agent network ahead of wider release, the LR330 luffing jib crane will officially begin shipping this month to fulfill agent pre-sale orders, and is now available for wider purchase, said the company.
Pelloby prides itself on being the UK's leading jib crane manufacturer and was therefore able to produce a fast and accurate quotation for this rotating jib crane, while tailoring every aspect of it - from the power slewing operating system to the choice of hoist and paint colour - precisely to the client's requirements.
Tholen then left the area with Cahoon to secure power to the hot rails feeding two bridge cranes they initially were assigned to inspect, located directly above the jib crane.
A machine-mounted jib crane and the low film alarm system simplify film roll replacement.
The company also added a jib crane and trolley system for easy removal of dredge pump components and an air-conditioned level room and machinery enclosure.
The judges were impressed by a fresh approach which included replacing the gantry crane with a jib crane, reducing the scale and cost of the building.
The entire front of the cabin, its sides and the front sections of the floor and roof are all made of glass, which ensure proper visibility of the working area below as well as above when installed in luffing jib crane models.
Free standing, the plug-and-play lifting solution incorporates the supplier's electrical servo-powered and programmable G-Force lift technology with an ergonomic, articulating jib crane to give an operator responsive, flexible and precise handling.
The unit incorporates the supplier's G-force intelligent lifting technology with an ergonomic articulating jib crane.
In order to accommodate the biggest sizes and allow them to be loaded by fork lift truck or jib crane, the cabinet has a pair of doors and a hinged top at the front.
Raimondi Cranes has launched a new luffing jib crane with a maximum jib length of 60m and a capacity of 18,000kg.