All Topics  
Grapple (tool)

 

 
   Email Print
   Bookmark   Link
 

 

Grapple (tool)
 
 
  Topics Grapple (tool) Topic Home

A grapple is a hook
Hook

Hook may refer to:...
 or claw
Claw (disambiguation)

A claw is a sharp growth at the end of a toe or finger.Claw may also refer to:*Claw hammer, a common carpentry tool*Bear claw , a sweet pastry often served for breakfast...
 used to catch or hold something. A ship's anchor
Anchor

An anchor is an object, often made out of metal, that is used to attach a ship to the bottom of a body of water at a specific point. There are two primary classes of anchors?temporary and permanent....
 is a type of grapple, especially the "grapnel" anchor
Anchor

An anchor is an object, often made out of metal, that is used to attach a ship to the bottom of a body of water at a specific point. There are two primary classes of anchors?temporary and permanent....
.

A throwing grapple (or "grappling hook
Grappling hook

A grappling hook is a hook attached to a rope, designed to be thrown or projected a distance, where its hooks will engage with the target. Grappling hooks were originally used in naval warfare to catch the rigging of an enemy ship so that it could be drawn in and boarded....
")is a multi-pronged hook that is tied to a rope and thrown to catch a grip, as on a parapet or branch of a tree. It may also be used in a boat to "drag" the bottom of a waterway to hook debris or to find missing objects.

In logging
Logging

Logging is the process in which certain trees are cut down for forest management and timber....
 and other engineering vehicle
Engineering vehicle

Engineering vehicles, known by the other terms: construction equipment, earth movers, heavy equipment or just plain equipment, are machines,vehicle machines, in the most basic form, are compound machines composed of simple machines....
s, a grapple is a hydraulic
Hydraulic machinery

Hydraulic machinery are machines and tools which use fluid power to do work. Engineering vehicle is a common example.In this type of machine, high-pressure liquid ? called hydraulic fluid ? is transmitted throughout the machine to various hydraulic motors and hydraulic cylinders....
ally powered claw
Claw (disambiguation)

A claw is a sharp growth at the end of a toe or finger.Claw may also refer to:*Claw hammer, a common carpentry tool*Bear claw , a sweet pastry often served for breakfast...
 with two or more opposing lever
Lever

In physics, a lever is a rigid object that is used with an appropriate fulcrum or wiktionary:pivot point to multiply the mechanical force that can be applied to another object....
s that pinch
Pinch

Pinch may refer to:* Pinch , a very small amount of an ingredient, typically salt or a spice* Pinch, West Virginia...
 a log
Log

Selfref|For Wikipedia's logs, see...
 or other materials, usually to lift
Forwarder

A forwarder is a vehicle that carries Timbers from the stump to a roadside landing. Unlike a skidder, a forwarder carries logs clear of the ground, which can reduce soil impacts but tends to limit the size of the logs it can move....
 or drag them.

The logging grapple used in swing yarding is not moved by hydraulics but by cables.






Discussion
Ask a question about 'Grapple (tool)'
Start a new discussion about 'Grapple (tool)'
Answer questions from other users
Full Discussion Forum



Encyclopedia


A grapple is a hook
Hook

Hook may refer to:...
 or claw
Claw (disambiguation)

A claw is a sharp growth at the end of a toe or finger.Claw may also refer to:*Claw hammer, a common carpentry tool*Bear claw , a sweet pastry often served for breakfast...
 used to catch or hold something. A ship's anchor
Anchor

An anchor is an object, often made out of metal, that is used to attach a ship to the bottom of a body of water at a specific point. There are two primary classes of anchors?temporary and permanent....
 is a type of grapple, especially the "grapnel" anchor
Anchor

An anchor is an object, often made out of metal, that is used to attach a ship to the bottom of a body of water at a specific point. There are two primary classes of anchors?temporary and permanent....
.

A throwing grapple (or "grappling hook
Grappling hook

A grappling hook is a hook attached to a rope, designed to be thrown or projected a distance, where its hooks will engage with the target. Grappling hooks were originally used in naval warfare to catch the rigging of an enemy ship so that it could be drawn in and boarded....
")is a multi-pronged hook that is tied to a rope and thrown to catch a grip, as on a parapet or branch of a tree. It may also be used in a boat to "drag" the bottom of a waterway to hook debris or to find missing objects.

In logging
Logging

Logging is the process in which certain trees are cut down for forest management and timber....
 and other engineering vehicle
Engineering vehicle

Engineering vehicles, known by the other terms: construction equipment, earth movers, heavy equipment or just plain equipment, are machines,vehicle machines, in the most basic form, are compound machines composed of simple machines....
s, a grapple is a hydraulic
Hydraulic machinery

Hydraulic machinery are machines and tools which use fluid power to do work. Engineering vehicle is a common example.In this type of machine, high-pressure liquid ? called hydraulic fluid ? is transmitted throughout the machine to various hydraulic motors and hydraulic cylinders....
ally powered claw
Claw (disambiguation)

A claw is a sharp growth at the end of a toe or finger.Claw may also refer to:*Claw hammer, a common carpentry tool*Bear claw , a sweet pastry often served for breakfast...
 with two or more opposing lever
Lever

In physics, a lever is a rigid object that is used with an appropriate fulcrum or wiktionary:pivot point to multiply the mechanical force that can be applied to another object....
s that pinch
Pinch

Pinch may refer to:* Pinch , a very small amount of an ingredient, typically salt or a spice* Pinch, West Virginia...
 a log
Log

Selfref|For Wikipedia's logs, see...
 or other materials, usually to lift
Forwarder

A forwarder is a vehicle that carries Timbers from the stump to a roadside landing. Unlike a skidder, a forwarder carries logs clear of the ground, which can reduce soil impacts but tends to limit the size of the logs it can move....
 or drag them.

The logging grapple used in swing yarding is not moved by hydraulics but by cables. To open and close the tongs of the grapple, two cables are used. One is tensioned and the other is slacked off to move the tongs. A third cable goes back to the tail hold then to the yarder. This third cable is used to pull the grapple out into the setting and to create tension for lifting the grapple in the air.

A grapple can be mounted to a tractor
Tractor

File:John Deere 3350 tractor cut.JPGA tractor is a vehicle specifically designed to deliver a high tractive effort at slow speeds, for the purposes of hauling a trailer or machinery used in agriculture or construction....
 or excavator
Excavator

An excavator is an engineering vehicle consisting of an articulated arm , bucket and cab mounted on a pivot atop an undercarriage with Caterpillar track or wheels....
 with a movable arm that may lift, extend/retract, and move side-to-side (pivot or rotate). Some machines also have a separate control for rotating the grapple.

Simpler grapple machines consist of a hydraulically liftable fork, rake ("grapple rake"), or bucket and a movable, opposing "thumb" (one or more hooks or levers) that enclose and grip materials for lifting or dragging. A "demolition bucket" or "multi-purpose bucket" on a loader may also operate as a grapple whereby the bottom and rear side of the bucket are hinged and can be forced apart or together with hydraulic
Hydraulics

Hydraulics is a topic of science and engineering dealing with the mechanical properties of liquids. Hydraulics is part of the more general discipline of fluid power....
 cylinders.

A lifting grapple is a type of hardware
Hardware

Hardware is a general term that refers to the physical cultural artifacts of a technology. It may also mean the physical components of a computer system, in the form of computer hardware....
 that can attached to most large, heavy or bulky object to provide a feature on the item to which material handling equipment can attach. Lifting grapples sometimes double as tie downs, allowing heavy items to be held firmly in place by providing a point to which ropes or chains can be attached to the item to hold it in place.

See also

  • Robotic end effector
  • Skidder
    Skidder

    A skidder is any type of heavy vehicle used in a logging operation for pulling cut timber out of a forest in a process called "skidding", in which the logs are transported from the cutting site to a landing....
    , especially with a grapple claw