| 摘要 |
<p>A bolt has an inner end threaded into a door body. A sleeve surrounds the bolt, and a locking bar surrounds the sleeve. A spring is supported by the bolt and urges the sleeve and locking bar toward the outer end of the bolt. A nut is threaded onto the outer end of the bolt and contacts the sleeve, so that rotation of the nut moves the sleeve axially of the bolt to adjust the pressure of the spring on the locking bar. A lock nut is screwed onto the outer end of the bolt and is locked to the nut, so that rotation of the lock nut rotates the bolt and adjusts the circumferential position of the locking bar.</p> |
