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Wire rope spooling-Technology is the technology to prevent wire rope getting snagged when spooled especially in ''multiple layers'' on a drum. ==History== Ever since the development of wire rope, comprising multiple wire strands, spooling it has presented technical challenges. When wrapped in multiple layers, the upper layers have a tendency to crush the lower layers, while the lower layers have a tendency to pinch upper layers. The rubbing of rope against rope also has a tendency to cause wear. These problems were addressed by Frank L. LeBus Sr., a supplier of drilling equipment to the oilfields of Texas, USA, who in 1937, patented the use of a groove bar on hoisting drums to guide the spooling of rope. Grooved shape steel segments were simply welded or screwed to existing plain steel drums. Ever since then, drum groovings have been widely used to guide the spooling of wire rope onto and off winch drums. Introducing a continuous helical groove onto the drum, like the thread of a screw, provides a way to guide the rope when spooling onto or off a drum. However this has been shown to work effectively only when the rope is wrapped in a single layer. When the rope is wrapped in multiple layers, problems remain. Frank LeBus introduced a grooving pattern that put the groove parallel to the flanges of the drum, except for a single slanted section across the drum face to act as crossover point, moving the rope along by the width of the groove with every revolution. In the U.S.A. Lebus is currently a registered trademark of Lebus International Inc, when the name 'Lebus" is used for "Cable or Wire Spooling on Rotary Drums of All Kinds', 'Registration Date November 21, 1961' . 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「Wire rope spooling technology」の詳細全文を読む スポンサード リンク
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