Problem to be solved: to provide an electric open door which can be installed without any adverse effects on the strength of the frame.Solution: a fulcrum pipe is fastened to a base Q located at the corner of the prismatic column a, and a single open door frame is attached through an axial pipe fitted in the fulcrum pipe, and a needle roller bearing is arranged at the corner of the prismatic column a symmetrical position with the fulcrum pipe One end of the second vertical square bar t is fixed to the second pipe to be fitted into the second pipe, and the second vertical square bar t is interlocked with the first square bar l fixed to the fulcrum pipe, and the string is attached to the right and left sides of the tip of the second vertical square bar t, and the left string is fixed to the column CThe ring is hung to the ring ring ring CR with the outer ring, and the right string is hung to the ring ring ring br which is adhere to the column B, and the weight is hung, and the weight is put on the power string to which the electric motor on the base Q rolls down, and the open door is opened By stopping the positioning switch and pressing the electromagnetic brake release switch, the open door is closed by the weight difference between the left and right sides.Diagram【課題】増改築工事等で骨組み強度に悪影響なく設置できる電動開き戸を提供する。【解決手段】角柱Aの角に位置する基盤Qに支点パイプを旋回自在に固定し、その支点パイプに嵌合された軸パイプ等を介して片開き戸枠組みを取付け、支点パイプと対称位置の角柱Aの角にニードルローラベアリングを配置し、それに嵌め被せる第2パイプに第2縦平角棒Tの一端を固着し、その第2縦平角棒Tと支点パイプに固着する第1平角棒Lとを連動させ第2縦平角棒Tの先端の左右それぞれに紐を取付け、左の紐は間柱Cに隣接固定する外輪溝付きリングCRに架け下げて重しを吊り下げ、右の紐は間柱Bに隣接固定する外輪溝付きリングBRに架け下げて重しを吊り下げし、基盤Q上の電動機が巻き下げる動力紐に付けた重しを吊り上げる事で片開き戸は開いて位置決めスイッチにより停止し、電磁ブレーキ解除スイッチを押す事で左右の重しの重量差により片開き戸を閉める。【選択図】図1
