#$%^&*AU2019101439B420200409.pdf#####Abstract The invention relates to a drop deck hook design, belonging to the field of semi-trailer. The drop deck hook including a bolt hook which is fixedly connected with the trailer. The bolt hook is provided with a hook wrench for controlling the opening and closing of the bolt hook. The trailer has a deck, the end of the deck is provided with a groove, and the hook wrench is matched with the groove; a groove is applied on the deck and the hook wrench can be operated from the top of the deck. Therefore, the center position of the hook is moved upward so that the distance from the ground to the center of the hook can meet the requirements of Australian standard. Furthermore, When the hook wrench is perpendicular to the deck, the bolt hook is opened, and when the hook wrench is parallel to the deck, the bolt hook will close. It can prevent the cargo from accidentally hitting the vertical hook wrench, avoiding a potential risk of bolt hook accidently unlocks, ensuring its safety.
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