| 摘要 |
PROBLEM TO BE SOLVED: To provide a lock bolt capable of preventing the looseness of a bolt by using an active type looseness preventive means, and adjusting a looseness preventive effect of the bolt.SOLUTION: A lock bolt has a head portion and a screw shaft. The screw shaft includes a bolt connected to the head portion at an upper end, and provided with a thread on a peripheral surface; a passage provided on the bolt, having at least one opening end, and positioned at one end of the bolt; at least one storage space provided on a peripheral surface of the screw shaft of the bolt, and communicated with the passage; at lease one locking tool arranged in the storage space, capable of displacing in an axial direction of the screw shaft; and a pressing tool arranged in the passage, and capable of displacing in the passage.SELECTED DRAWING: Figure 3 |
