Thick plate type joint lock for ladder connection
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United States of America Patent
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Nov 26, 2019
Grant Date -
Jul 20, 2017
app pub date -
Apr 4, 2017
filing date -
Jan 18, 2013
priority date (Note) -
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Abstract
The utility model provides a thick-plate hinge for ladder jointing, comprising an inner plate and outer plates that are rotatably connected to each other; the thick-plate hinge further comprises a positioning shaft sleeve designed to lock up and position the inner plate and outer plates, the outer plate is provided with a stop stub designed to limit the relative rotation angle of the inner plate, the inner plate is provided with a slot designed to stop the stop stub. Compared to the prior art, when the thick-plate hinge for ladder jointing provided in the utility model is used on a ladder, the ladder will have improved bearing performance, and will be safer and more reliable. In addition, the present utility model is simple in structure, easy to manufacture, and low in cost.
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