Uses of Overhead Cranes
A Crane is a lifting machine, generally equipped with a winder (also called a wire rope drum), wire ropes or chains and sheaves that can be used both to lift and lower materials and to move them horizontally. It uses one or more simple machines to create mechanical advantage and thus move loads beyond the normal capability of a human. Cranes are commonly employed in the transport industry for the loading and unloading of freight, in the construction industry for the movement of materials and in the manufacturing industry for the assembling of heavy equipment.
An Overhead Crane is a type of crane where the hook-and-line mechanism runs along a horizontal beam that runs along two widely separated rails. Often it is in a long factory building and runs along rails along the building's two long walls. It is similar to a gantry crane. Overhead cranes typically consist of a hoist to lift the items, the bridge, which spans the area covered by the crane, and a trolley to move along the bridge.
The most common Overhead Crane use is in the steel industry. Every step of steel, until it leaves a factory as a finished product, the steel is handled by an overhead crane. Raw materials are poured into a furnace by crane, hot steel is stored for cooling by an overhead crane, the finished coils are lifted and loaded onto trucks and trains by overhead crane, and the fabricator or stamper uses an overhead crane to handle the steel in his factory. The automobile industry uses overhead cranes for handling of raw materials. Smaller workstation cranes handle lighter loads in a work-area, such as CNC mill or saw
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CONCRETE BLOCK MACHINE – PART 4
Complete range of semi and fully automatic block making machine for the production of concrete hollow blocks, solid bricks, ceiling blocks, paving stones, curb stones etc. Depending on the design of the concrete products, a production height from 40mm up to 400mm can be manufactured. The machine can be supplied with face mix filling device and equipped with different options of handling systems from simple rope conveyor and gantry hoist system, rack & forklift system up to fully automatic finger car and palletizing with cubing and strapping devices. For more information, please contact as follows:- Katz McCathy Pte Ltd, email: kmccathy@singnet.com.sg, website: www.katzmccathy.com
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CONCRETE BLOCK MACHINE – PART 3
Complete range of semi and fully automatic block making machine for the production of concrete hollow blocks, solid bricks, ceiling blocks, paving stones, curb stones etc. Depending on the design of the concrete products, a production height from 40mm up to 400mm can be manufactured. The machine can be supplied with face mix filling device and equipped with different options of handling systems from simple rope conveyor and gantry hoist system, rack & forklift system up to fully automatic finger car and palletizing with cubing and strapping devices. For more information, please contact as follows:- Katz McCathy Pte Ltd, email: kmccathy@singnet.com.sg, website: www.katzmccathy.com
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Overhead Crane Project
Not my neatest video making but you get the idea 
made entirely of free scrap metal!
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CONCRETE BLOCK MACHINE – PART 2
Complete range of semi and fully automatic block making machine for the production of concrete hollow blocks, solid bricks, ceiling blocks, paving stones, curb stones etc. Depending on the design of the concrete products, a production height from 40mm up to 400mm can be manufactured. The machine can be supplied with face mix filling device and equipped with different options of handling systems from simple rope conveyor and gantry hoist system, rack & forklift system up to fully automatic finger car and palletizing with cubing and strapping devices. For more information, please contact as follows:- Katz McCathy Pte Ltd, email: kmccathy@singnet.com.sg, website: www.katzmccathy.com
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CONCRETE BLOCK MACHINE – PART 1
Complete range of semi and fully automatic block making machine for the production of concrete hollow blocks, solid bricks, ceiling blocks, paving stones, curb stones etc. Depending on the design of the concrete products, a production height from 40mm up to 400mm can be manufactured. The machine can be supplied with face mix filling device and equipped with different options of handling systems from simple rope conveyor and gantry hoist system, rack & forklift system up to fully automatic finger car and palletizing with cubing and strapping devices. For more information, please contact as follows:- Katz McCathy Pte Ltd, email: kmccathy@singnet.com.sg, website: www.katzmccathy.com
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SEMI-AUTOMATIC CONCRETE BLOCK MACHINE
Complete range of semi and fully automatic block making machine for the production of concrete hollow blocks, solid bricks, ceiling blocks, paving stones, curb stones etc. Depending on the design of the concrete products, a production height from 40mm up to 400mm can be manufactured. The machine can be supplied with face mix filling device and equipped with different options of handling systems from simple rope conveyor and gantry hoist system, rack & forklift system up to fully automatic finger car and palletizing with cubing and strapping devices. For more information, please contact: Katz McCathy Pte Ltd, Steven Yuen, email: kmccathy@singnet.com.sg, website: www.katzmccathy.com
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Concrete Block Machine-Model KMC-30.M
Complete range of semi and fully automatic block making machine for the production of concrete hollow blocks, solid bricks, ceiling blocks, paving stones, curb stones etc. Depending on the design of the concrete products, a production height from 40mm up to 400mm can be manufactured. The machine can be supplied with face mix filling device and equipped with different options of handling systems from simple rope conveyor and gantry hoist system, rack & forklift system up to fully automatic finger car and palletizing with cubing and strapping devices. For more information, please contact: Katz McCathy Pte Ltd, Steven Yuen, Email: kmccathy@singnet.com.sg, website: www.katzmccathy.com
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Getting Big Jobs Done With Small Jib Cranes
There are many different varieties of cranes on the market today, both in terms of size and type. Each type and size serves a different function. In essence, a crane is a machine, which lifts materials up and down as well as horizontally. They are most often used in the construction, manufacturing and transport industries. Cranes are typically used to move and assemble heavy equipment. Crane sizes run the gamut from the enormous ones all the way to much smaller ones which tend to be used in factories and workshops. There are also really tall ones typically used in the construction of tall buildings. The three most common crane types are overhead cranes, gantry cranes and jib cranes.
Jib cranes are a type in which there is a horizontal portion, known as a jib or a boom that supports a hoist, which is moveable. The horizontal member of this type of crane is fixed either to a wall or floor-mounted pillar. Jib cranes are most often used on military vehicles or in industrial facilities. The horizontal jib can either be fixed, or it can swing through in an arcing movement, which provides more lateral movement.
Jib cranes are typically smaller in size, which make them perfect for industrial purposes. Jib cranes are often referred to simply as hoists. This is because they are often installed on an upper floor area of warehouses so they can lift material in the warehouse to any and all floors.
There are several different types of jib cranes, including the wall crane and the hammerhead crane, both of which share many similarities with the boom crane. All of these varieties consist of an arm that suspends a hoist rope, hook and block. The difference between the majority of boom cranes and the jib crane is the fact that jib cranes are not adjustable to maneuver at a specific angle. Rather, a jib crane is locked in a fixed horizontal position.
With all types of cranes, taking the proper safety measures prior to and during operation is vital. This is because cranes can be very dangerous if used improperly by untrained operators, with the consequence being the potential for accidents causing serious injury or even death. Even though jib cranes are among the smaller breed of cranes, proper use and safety is still extremely important. Before engaging in use of a jib crane, you must check it to ensure there are no bent supports and that it is not misaligned at all. Anyone operating a jib crane must be knowledgeable in the jib arm's range of motion, as well as the location of the Emergency Stop Button and Overload Indicators. An operator must be trained in when and how to use these buttons, along with overall training on the operator of the jib crane.
With the proper experience and training, jib cranes can be extremely safe and useful on any job. Due to their size, they can fit inside many large indoor premises, which require the use of a crane to lift materials onto or from many different levels. Remember to always put safety first when getting the job done.
Using proper equipment ensures speedy completion of work. For all your requirements for New and Used Telehandlers, digger attachment, Forklifts, Jib cranes, and all equipment and Telehandler training courses, please do visit our site and Call or Contact us - http://www.liftingsolutions.com.au/
Paul Gray is the MD of YG Lifting Solutions which deals and supplies New and USed Construction equipment like Telehandlers, Digga Attachments, Manitou Forklift, Tower Cranes, Forklift attachments, Telehandler Training and more - http://www.liftingsolutions.com.au/
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Level luffing crane
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A level luffing crane is a crane mechanism where the hook remains at the same level whilst luffing; moving the jib up and down, so as to move the hook inwards and outwards relative to the base.
Some types of crane are inherently level luffing: those with a fixed horizontal jib, such as gantry, hammerhead or the fixed-jib tower cranes commonly used in construction. Usually though, the description is only applied to those with a luffing jib that have some additional mechanism applied to keep the hook level when luffing.
Level luffing is most important when careful movement of a load near ground level is required, such as in construction or shipbuilding. This partially explains the popularity of fixed horizontal jibs in these fields.
Toplis cable luffing
Stothert & Pitt crane with Toplis gear
An early form of level luffing gear was the "Toplis" design, invented by a Stothert & Pitt engineer in 1914. This is also a purely mechanical linkage, arranged by the reeving of the hoist cables to the jib over pulleys at the crane's apex above the cab, so that luffing the jib upwards allows more free cable and lowers the hook to compensate.
Horse-head jibs
Horse-head design
The usual mechanism for level luffing in modern cranes is to add an additional "horse head" section to the top of the jib. By careful design of the geometry, this keeps level merely by the linked action of the pivots.
Powered level luffing
As cranes and their control systems became more sophisticated, it became possible to control the level of luffing directly, by winching the hoist cable in and out as needed. The first of these systems used mechanical clutches between luffing and hoist drums, giving simplicity and a "near level" result.
Later systems have used modern electronic controls and quickly reversible motors with good slow-speed control to the hoist winch motors, so as to give a positioning accuracy of inches. Some early systems used controllable hydraulic gearboxes to achieve the same result, but these added complexity and cost and so were only popular where hgih accuracy was needed, such as for shipbuilding.
Luffing cabs
Luffing mechanisms have also been applied to the driver's cab being mounted on its own jib, following the movement of the crane's main jib These are used for tasks such as ship unloading, where the view from the driver's cab is greatly improved by cantilevering it forwards and over the ship.
Meccano models
Cranes have long been a popular subject for Meccano models, and luffing cranes are no exception.
References
^ "Level luffing crans" (pdf). Konecranes. http://www.konecranes.com/attachments/brochures/level_luffing_low.pdf.
^ "Dockside crane: Stothert and Pitt's DD2". Design 1968 Journal. 1968. http://vads.ahds.ac.uk/diad/article.php?year=1968&title=233&article=d.233.47.
^ a b "Toplis level luffing crane". http://www.btinternet.com/~a.esplen/models/pic12.htm.
^ Molian, Samuel (1982). Mechanism Design: An Introductory Text. CUP. p.p61. ISBN 0521231930.
^ Convertible level luffing crane USpatent3685668
^ Double link level luffing crane USpatent4606469
^ Joseph N. Attard. "Level luffing crane model". http://www.patbelford.com/toys/library/level-luffing-crane/index.html.
^ "Level Luffing Port Crane" (pdf). South East London Meccano club. http://www.selmec.org.uk/Downloads/article_0008_level_luffing_port_crane.pdf.
v?d?eTypes of Cranes
Container crane Crane vessel Gantry crane Level luffing crane Sidelift Straddle carrier Tow truck
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