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The rolling hitch is a knot (see also Magnus hitch) used to attach a rope to a rod, pole, or another rope. A simple friction hitch, it is used for lengthwise pull along an object rather than at right angles. The rolling hitch is designed to resist lengthwise movement for only a single direction of pull.〔Clifford W. Ashley, ''The Ashley Book of Knots'' (New York: Doubleday, 1944), 292.〕 A common usage while sailing is for rigging a stopper to relax the tension on a sheet so that a jammed winch or block can be cleared. == Naming == At the turn of the 19th Century the knot now known as the "rolling hitch" was called the Magnus or Magner's hitch, and the name rolling hitch referred to two round turns and two half hitches. In 1841 Richard Henry Dana, Jr. used the present-day names in his work ''The Seaman's Friend'', and subsequent authors have continued to use this terminology.〔〔Richard Henry Dana, Jr., ''The Seaman's Friend: A Treatise on Practical Seamanship, 14th Edition'' (Boston: Thomas Groom & Co., 1879; Dover Republication 1997), 49.〕 There are two slightly different hitches commonly known by the name of "rolling hitch". ''The Ashley Book of Knots'' identifies these two variations as "Rolling Hitch(1)" and "Rolling Hitch(2)" and numbers them #1734 and #1735, respectively. Despite the potential for confusion with the older usage, Ashley chose the name "Magnus Hitch" to refer to knot #1736, which is simply #1734 tied with the final hitch made in the opposite direction.〔Ashley, 298.〕 Since two distinct variations of the rolling hitch are widely referred to by the same name, and Magnus hitch now may refer to a different knot than it used to, the use of Ashley reference numbers for these related hitches can eliminate ambiguity when required. These hitches are pictured at the right. When a rolling hitch or Magnus hitch is tied around the standing part of the rope to form an adjustable loop it is often referred to as a taut-line hitch or one of several other names, although some sources fail to differentiate by using a separate name. ==Tying== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rolling hitch」の詳細全文を読む スポンサード リンク
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