防災・減災を目的とした傾斜すべり支承の開発
2011年東北地方太平洋沖地震の後、BCPの観点から自動ラック倉庫には荷崩れ防止対策が求められた。そこで、軽量な上に積載荷重が変動する自動ラック倉庫の免震化に適用可能な傾斜すべり支承を開発した。本稿は、傾斜すべり支承の開発経緯、メカニズム、開発内容を述べた上、自動ラック倉庫のほか、キュービクルへの適用、実施例を紹介する。更にアスペクト比の高い架構へ適用拡大することを目的とし、傾斜すべり支承の摺動子に積層ゴムを挟んだ傾斜弾性すべり支承を開発した。ここでは、免震エレベーターへの適用について述べる。
Development of Sloped Sliding-Type Bearing for Disaster Prevention and Mitigation
The Great East Japan Earthquake of 2011 demonstrated the need for measures to prevent the collapse of products stored in warehouses with automatic racking systems from the perspective of BCP. A sloped sliding-type bearing has been developed that is lightweight and suitable for automatic warehouses with fluctuating loading capacity. This paper explains the development history of this sliding bearing, its mechanism, and its mechanical details. Application to cubicle-type high voltage receiving equipment as well as automatic rack warehouses is described, and details of some implementation cases are given. Furthermore, with the aim of expanding application to frames with a high aspect ratio, an elastic version of the bearing in which laminated rubber is sandwiched between the sliders of this sliding bearing is also described. The application of this bearing to the seismic isolation of elevators is described.