TENSION ADJUSTMENT DEVICE

To provide a tension adjustment device of a movable handrail capable of continuously keeping optimal pressing force for a long time.SOLUTION: A tension adjustment device is arranged on an endless movable handrail provided on a passenger conveyor for conveying passengers to adjust the tension of the movable handrail. The tension adjustment device includes a fixed frame fixed to a skeleton, a roller support frame supporting a roller abutting on the movable handrail, an intermediate support frame provided to be vertically movable between the fixed frame and the roller support frame, and an engagement mechanism detachably engaging the intermediate support frame to the fixed frame at a predetermined position in the vertical direction. The intermediate support frame is downwardly energized to the fixed frame by a first elastic body. The roller support frame is downwardly energized to the intermediate support frame by a second elastic body. After releasing the engagement state in which the intermediate support frame is engaged with the fixed frame at a predetermined timing, the engagement mechanism makes the intermediate support frame be engaged with the fixed frame again.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、乗客を搬送する乗客コンベアに設けた無端状の移動手すりに配置され、前記移動手すりの張力を調整する張力調整装置であって、躯体に固定した固定枠と、前記移動手すりに当接するローラを支持するローラ支持枠と、前記固定枠と前記ローラ支持枠との間を上下方向に移動自在に設けた中間支持枠と、前記中間支持枠を上下方向の所定位置で前記固定枠に係脱自在な係合機構と、を備え、前記中間支持枠は前記固定枠に対して第１弾性体で下方に付勢力されており、前記ローラ支持枠は前記中間支持枠に対して第２弾性体で下方に付勢されており、前記係合機構は所定のタイミングで前記固定枠に前記中間支持枠を係合した状態から係合を解除した後、再度係合する。【選択図】図２