| 摘要 |
Tongs for lifting heavy members such as structural steel, wheels, pipes and the like. The tongs are provided with a pair of opposed arms which are pivoted at one end about a shaft member. The opposite ends of the arms provide a gripping means for lifting members. The shaft member is provided with a bail member which may be secured to a crane or similar device to lift the tongs. A threaded member is also pivotally mounted on the shaft between the arms and carries a locking member which is movable on the threaded member and has sides which engage the exterior of the arms to lock them in lifting engagement with an object to be lifted. A nut is provided on the threaded member and may be threaded into contact with the locking member to hold it in a locked position.
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