PROBLEM TO BE SOLVED: To make it possible to easily adapt for a step surface generated on a travel surface such as a road surface, a site area surface or the like.SOLUTION: In a step adaptable type caster device, an elevation guide 2 having a guide surface 2b1 is fixed to a holding body 1 which is attached to a load-carrying platform B, a crank stay 3 is connected to the holding body 1 through a main axle 4 to which a main wheel 5 is attached, and an auxiliary wheel 7 having an auxiliary axle 6 as a rotation center, which is rotatably supported on the crank stay 3 to which a return elastic force is given is provided. The main axle 4 is movable in a guide hole 1b1 of the holding body 1, and a guide roller 7A, which has the main axle 4 as a rotation center and travel of which is guided by the guide surface 2b1, is provided. The auxiliary wheel 7 has a diameter smaller than a diameter of the main wheel 5, is set to a level above a step surface G2 while being located on a front side with respect to the main wheel, and can be grounded on a step passing ground surface G3 against a return spring force.SELECTED DRAWING: Figure 1
【課題】 路面や敷地面などの走行地面に生じている段差面に対して容易に対応可能にする。【解決手段】 荷台Bに取り付けている保持本体1にガイド面2b1を有する昇降ガイド2を固定し、保持本体1に主車輪5を取り付けている主車軸4を通じてクランクステイ3を連結し、戻り弾性力が付与されているクランクステイ3に回転可能に支持されている補助車軸6を回転中心とする補助車輪7を設け、主車軸4が保持本体1のガイド孔1b1内を移動可能であり、主車軸4を回転中心としかつガイド面2b1に走行案内されるガイドローラー7Aを設け、補助車輪7はその径が主車輪5の径より小であり、主車輪より前側に配置されていると共に段差面G2を越えるレベルに設定されており、戻りばね力に抗して段差通過地面G3に接地可能である。【選択図】 図1
STEP ADAPTABLE TYPE CASTER DEVICE
段差対応型のキャスター装置
2016-12-08
Patent
Electronic Resource
Japanese