PROBLEM TO BE SOLVED: To provide a rotary arm bearing structure that prevents any electric wire from being caught between a rotary arm and a stopper plate.SOLUTION: The bearing structure includes: a bearing 2 opening forward with a side piece 1 installed at both sides the rotary arm 3 whose base is vertically rotatably pivoted within the bearing 2 and whose end protrudes forward from the bearing 2 a stopper plate 4 provided within the lower part of the bearing 2 located below the rotary arm 3 and a contact plate 5 provided at the rotary arm 3 and protrudes downward therefrom, with its lower surface to contact the upper surface of the stopper plate 4 when the rotary arm 3 rotates to reach its lowest position. When the rotary arm 3 is in the state of having rotated to its lowest position, the contact plate 5 is attached to the rotary arm 3 so that its leading end cannot protrude from the front end of the side piece 1, and the protrusion length of the contact plate 5 from the lower surface of rotary arm 3 is made longer than the diameter of the electric wire 6.COPYRIGHT: (C)2010,JPO&INPIT【課題】回動アームとストッパー板の間に電線が挟まれることを防ぐことができる回動アームの軸受け構造を提供する。【解決手段】両側に側片1を設けて前方へ開口する形状に形成される軸受け2と、基部が軸受け2内において上下回動自在に枢支され、先部が軸受け2内から前方へ突出する回動アーム3と、回動アーム3の下側位置において軸受け2の下部内に設けられたストッパー板4と、回動アーム3に下方へ突出して設けられ、回動アーム3が下限位置に回動したときに下面がストッパー板4の上面に当接する当て板5を備える。そして回動アーム3が下限位置に回動した状態で、当て板5の前端部が側片1の前端よりも前方へ突出しない位置に当て板5を回動アーム3に取り付けると共に、当て板5の回動アーム3の下面からの突出寸法を電線6の直径よりも大きい寸法に形成する。【選択図】図1
