What is the rope?
The rope pickup is often referred to as block and tools and consists of one rope that runs several times between two sets of flaps in a large block, each of which is usually equipped with a steel hook. When the free end of the rope is pulled out, it goes through a number of steps on two pulleys. Crossing by rope with a pulley system increases the lifting or pulling force of the rope of the jack, while maintaining the tensile force needed to lift the weight very low. Modern versions, originally made with wooden blocks and pulleys operating in accordance with hemp type rope, often use metal blocks complemented by plastic pulleys and nylon rope.
Long before electric jacks, when a heavy object required lifting, the selection tool was. Occasionally the item was so heavy that the rope was tied to a horse or mule to ensure the pulling force needed to lift the object. Finally, the block and tools or a rope jack and lifting heavy objects were much easier. By browsing the rope back and forth between two blocks on the séRii of stacked mamins increase significantly. The more passages are the rope, the greater the lifting force of the rope jack.
The problem with the rope jack is that the more lifting force the jack, the slower the speed of lifting. With large block and tools, the load is often raised only a small amount of every long rope. This can create a time -consuming elevator if it moves a very heavy object. By attaching the free end of the rope jack to the horse or mule, the load easily rises; However, the animal may have to travel for a long distance to complete the elevator. This can often create a problem with the universe unless there is enough space to travel an animal.
In addition to vertical lifting, the rope stroke can also be used very efficiently to tighten two objects together horizontal application. This is often useful in tying two posts together or trying to straighten the OPof a particular post or barn. A rope lifter was often used in the construction of a barn or other large structures. This technology made it possible to build a wall on the ground and then lifted it to the position by running the rope jack up and over the beam and pulling the rope of the gap or horse.