Jib Crane


Also found in: Dictionary, Wikipedia.

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 ?
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. After de-energizing the disconnect for the bridge cranes, they installed their individual safety locks in the proper location but again didn't perform the initial voltage check.
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.
Italian tower crane specialist Raimondi has launched a new luffing jib crane, LR330, which uses an equilateral triangular jib design described by the company as a "breakthrough that enhances several different aspects of the machine".
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.
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.
Tenders are invited for procurement of jib crane for gas cracker unit-ii at gail pata
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.
The unit incorporates the supplier's G-force intelligent lifting technology with an ergonomic articulating jib crane. Flexible, responsive and freestanding, the device places objects precisely within a span of 14 feet.
The high-tech portal jib crane is scheduled to be taken into operation in August 2014.
As part of its programme of investment the company is currently setting up a specialised jib crane manufacturing area at East Kilbride to enable it to service the growing UK and export market.
Contract notice: contract regarding portal mobile jib crane with hydraulic controlled fixed boom and stick (not a wire crane) with minimum 37 m outreach