| 摘要 |
A coupling device that requires no manual actuation to achieve coupling features a lacking bait movable slang a hale extending into a mouth of a hook body to secure a coupling pin therein. A control lever pivotally connected to the locking bolt opposite the mouth end is biased toward a locked position i n which motion of the locking bolt is blocked. To engage the coupling pin and the ho ok mouth, the coupling pin and an operable pin extending through the hollow locking bolt are brought into contact. This causes an end of the operable pin opposi te the mouth to push against the control lever to unlock it from the latching position. The coupling pin pushes the locking bolt out of the mouth so that it can pass by further into it, at which point the lever and bolt return to the lacked positions to secure the coupling pin inside.
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