To provide a buffer capable of making a spring characteristic of a spring member into a two-stage characteristic, the spring member configured to energize the buffer so as to contract in a predetermined stroke region.SOLUTION: A buffer comprises: a cylinder 30; a piston rod 32 inserted into the cylinder 30 so as to be movable in an axis direction; and a spring member 4 provided between a piston 31 and a rod guide 33, and configured to, when it is compressed, energize the piston 31 and the rod guide 33 so as to separate them from each other, wherein the piston and the rod guide are provided on an outer periphery of the piston rod 32, and approach each other when the spring member is extended. The spring member 4 has a first spring 5, a second spring 6 arranged in series with the first spring 5, and a regulation unit 7 configured to regulate the first spring 5 from contracting before heights of the first spring 5 and second spring 6 become an adhesion height.SELECTED DRAWING: Figure 2
【課題】 所定のストローク領域で緩衝器を収縮方向へ附勢するばね部材のばね特性を二段特性にできる緩衝器を提供する。【解決手段】 シリンダ30と、シリンダ30内に軸方向へ移動可能に挿入されるピストンロッド32と、ピストンロッド32の外周であって伸長時に接近するピストン31とロッドガイド33の間に設けられ、圧縮されるとピストン31とロッドガイド33を離間させる方向へ附勢するばね部材4とを備え、ばね部材4は、第一ばね5と、第一ばね5に直列配置される第二ばね6と、第一ばね5と第二ばね6が密着高さになるより前に第一ばね5の収縮を規制する規制部7とを有する。【選択図】 図2
BUFFER
緩衝器
2019-01-10
Patent
Electronic Resource
Japanese