OPENING/CLOSING DEVICE FOR SLIDING DOOR

PROBLEM TO BE SOLVED: To provide an opening/closing device for a sliding door in which both a pulling device and a self-closing device are incorporated while exhibiting their respective advantages, and capable of opening the sliding door even when the initial opening force is small in the initial operation section in which the sliding door is opened from its fully closed state.SOLUTION: An opening/closing device for a sliding door includes: a self-closing device A that applies a closing force to a sliding door 1 in the closing direction; and a pulling device B that accumulates an elastic force to be applied in the closing direction when the sliding door is opened from its fully closed state to a position away therefrom by an operation distance L and assists a closing operation of the sliding door that has been moved from its opened position in the closing direction such that the accumulated elastic force causes the sliding door to move from its fully closed state to the position away therefrom by the operation distance L. A delay mechanism C is provided between the self-closing device and the sliding door in order that the self-closing device is prevent from applying the closing force when the sliding door is moved from its fully closed state to a position away therefrom by a non-operation distance D and the non-operation distance D is set to be less than the operation distance L.SELECTED DRAWING: Figure 1 【課題】引き込み装置と自閉装置を両方組み込み、それぞれの利点を発揮させつつ、全閉状態から引戸を開く初期動作区間で初期開力が小さくても引戸を開くことが可能な引戸の開閉装置を提供する。【解決手段】閉止方向へ閉止力を引戸１に付与する自閉装置Ａと、全閉状態から作動距離Ｌの位置まで引戸を開く際に閉止方向への弾性力を蓄積し、開状態から閉止方向へ移動してきた引戸を作動距離Ｌの位置から全閉状態まで蓄積弾性力によって閉止動作を支援する引き込み装置Ｂとを備えた引戸の開閉装置であって、自閉装置と引戸の間に、全閉状態から非作動距離Ｄの位置まで引戸を開く際に自閉装置による閉止力が作用しないように遅延機構Ｃを設けるとともに、作動距離Ｌより非作動距離Ｄを短く設定した。【選択図】 図１