エレベータ釣合車の巻上機ブレーキ制動時における上下変位評価

摘要

Most elevators applied to tall buildings include compensating ropes to satisfy the balanced rope tension between the car and the counter weight. The compensating ropes receive tension by the compensating sheave, which is installed at the bottom space of the elevator shaft. It is important to evaluate the vertical displacement of the compensating sheave, because the displacement is one of the key factor to determine the pit depth of the elevator shaft. This paper shows an elevator dynamic model that calculates the compensating sheave motion during a brake activation of the traction machine. Firstly, an elevator system model is proposed to evaluate the vertical motion of each component. The derived simulation model indicates that the vertical static displacement of the compensating sheave depends on the car position and the car loading condition. Secondary, the vertical vibration induced by the brake of the traction machine is evaluated numerically. It is concluded that the maximum vibration occurs when the vertical vibration by the car stop timing synchronizes the phase of the vibration by the brake activation. The maximum vibration is also evaluated by a mathematical formulation and it shows that the vertical vibration is proportional to the building height.%高層ビルに適用されるエレべータでは，かごと釣合おもリを駆動するメインロープの重量アンバランスを補正するために，釣合ロープをかごと釣合おもりに吊り下げている.また釣合ロープは，昇降路ピットに設けた釣合車によって張力が付与されている.この釣合車は，ピットに対して水平方向の動きが規制されているが，上下方向については釣合ロープやメインロープの経年伸びに対応するため，自由に動くことが可能である.