TENSION ADJUSTMENT DEVICE

To provide a tension adjustment device of a moving handrail capable of keeping optimal pressing force for a long period of time and preventing damage when sudden impact force is applied to the tension adjustment device during driving.SOLUTION: A tension adjustment device includes a substrate, a roller, a roller support member, a first energization member, a lock mechanism having a locking part and a locked part, and an oscillating mechanism having an engaging part and an engaged part. When upward tension exceeding the energization force of the energization member is received from the roller, the engaging part engages with the engaged part to serve as an oscillating fulcrum and the roller support member is oscillated such that the locking part is locked to the locked part.SELECTED DRAWING: Figure 2 【課題】 最適な押圧力を長期間維持し続けることができ且つ駆動中に急激な衝撃力が作用したときには損傷を防止できる移動手すりの張力調整装置を提供する。【解決手段】 張力調整装置は、基板と、ローラと、ローラ支持部材と、第１付勢部材と、係止部と被係止部とを有するロック機構と、係合部と被係合部とを有する揺動機構と、を備え、前記ローラから前記付勢部材の前記付勢力を超える上向きの張力を受けたときに、前記係合部は前記被係合部と係合して揺動支点となり、前記ローラ支持部材が揺動して前記係止部が前記被係止部に係止する。【選択図】 図２