To provide a wheel structure capable of smoothly performing a running-on action with small force from the start of running onto a step to its completion.SOLUTION: A wheel structure includes a frame provided with a main wheel of a large diameter, an auxiliary wheel of a small diameter and an object placing table installation part. The wheel structure is configured such that after the main wheel makes contact with a step, the auxiliary wheel abuts against an upper surface of the step and the main wheel runs onto the upper surface of the step. The frame supports the auxiliary wheel in a front lower end part thereof, and the frame has a hole portion of a shape that connects a short length hole extending backward and downward and a long length hole extending backward and upward via a curved hole part such that a main wheel shaft can be inserted into the hole portion. By movement of the main wheel shaft inserted into the hole portion through the hole portion, the main wheel runs onto the upper surface of the step while forming a predetermined path, and by movement of the main wheel shaft through the hole portion in an opposite direction to that in running on, the wheel structure returns to a state before contact with the step.SELECTED DRAWING: Figure 1
【課題】段差乗り上げの開始から完了まで、小さな力で、スムーズに乗り上げ動作を行うことができる車輪構造体を提供する。【解決手段】大径の主輪、小径の補助輪、および運搬物載置台取付部が設けられたフレームを有し、主輪の段差接触後、補助輪が段差上面に当接して、主輪が段差上面に乗り上げるように構成されている車輪構造体であって、フレームは、前方下端部に前記補助輪を支持していると共に、フレームには、後下方に伸びる短尺孔部と、後上方に伸びる長尺孔部とが湾曲孔部で接続された形状の孔部が、主輪軸が挿通できるように形成されており、孔部に挿通された主輪軸が孔部を移動することにより、主輪が所定の軌道を形成しながら段差上面に乗り上げ、主輪軸が孔部を、乗り上げ時と逆方向に移動することにより、段差接触前の状態に戻るように構成されている車輪構造体。【選択図】図1
WHEEL STRUCTURE
車輪構造体
11.10.2023
Patent
Elektronische Ressource
Japanisch
IPC: | B60B VEHICLE WHEELS , Räder für Fahrzeuge |
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