showstack / glossary / chain-hoist
Chain hoist / chain motor 電動葫蘆
A powered or hand-chain hoist built to raise and lower a suspended load, used in entertainment rigging as point hoists for trussing, scenery or effects. "Chain motor" usually means the electric version run from a pendant or network control; a plain "chain hoist" can be manual. What makes it a hoist under the entertainment standard is not the chain — it is a locking brake built to hold a suspended load. A winch is a different class of machine.
中文
以鏈條升降吊掛負載的葫蘆，可為電動或手拉。台灣多稱「電動吊車」或「電動葫蘆」，香港常直接說 motor 或「摩打」。
Easy to get wrong
ANSI E1.6-1's own annex draws the line: a hoist lifts with a locking brake for suspension; a winch pulls, and a capstan winch is explicitly outside the standard's scope.
Crews use "hoist," "chain motor" and "winch" almost interchangeably. If it's actually a winch under that truss, it may not be rated to hold a static load the way a purpose-built hoist is.
Next to this
Winch捲揚機A powered drum that spools wire rope to pull a load, mounted so the rope can run over sheaves at an angle rat…Fly吊桿／拉 flyTo move scenery, lighting bars or people vertically on a suspension system, and by extension the bar itself. …Safe working load (SWL) / working load limit (WLL)安全操作負荷The maximum load a piece of rigging hardware is rated to carry in normal service — not its breaking strength,…
Sources
- ANSI E1.6-1 – 2019: Entertainment Technology – Powered Hoist Systems — ESTA Technical Standards Program primary
- What is the difference between a chain motor and a manual chain hoist? — 4Wall Entertainment
Understand the mechanism
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