PROBLEM TO BE SOLVED: To solve the problem that it is desirable to realize a caster that can get over a step, which is most difficult in operating an instrument such as a wheelchair and a carriage that carries and moves a person and an article, and can be easily and safely operated by anyone and mounted on a wheel chair, a carriage and the like, which are commercially available.SOLUTION: An auxiliary wheel assembly 4 for getting over a step is provided at a front position of a caster type front wheel 8. Because the auxiliary wheel assembly 4 gets caught in a step 9 when using only the front wheel 8 and the auxiliary wheel assembly 4 and therefore cannot get over the step 9, a link mechanism 12 is provided between a screw for fixing a front wheel part and a portion for revolving the front wheel. In the front wheel 8 is provided a front wheel cover 19 and arranged the auxiliary wheel assembly 4 constituted of an auxiliary wheel 1, an auxiliary wheel 2, an auxiliary wheel frame and a return spring 23 for the auxiliary wheel assembly, with a B shaft 6 at a front part of the front wheel cover 19 as a fulcrum. Even if the auxiliary wheel assembly 4 gets caught in the step 9, centers of gravity of a wheelchair, a carriage and the like are retreated by retreating and floating up the front wheel 8 and the auxiliary wheel assembly 4 by oscillation of the link mechanism 12, allowing the wheelchair, the carriage and the like to easily get over the step 9.

    【課題】車椅子や台車等、人や物を乗せて移動する機器の操作でもっとも大変なのは段差の乗り越えである。誰もが簡単に、かつ、安全に操作でき、市販の車椅子や台車等に取り付けられるものが求められている。【解決手段】キャスター型の前輪8の前方位置に段差乗り越え用の補助輪組立4を設ける。前輪8と補助輪組立4だけでは段差9に補助輪組立4が噛み込みを起こして段差9を乗り越えることはできないので、前輪部取付ネジと前輪旋回部の間にリンク機構12を設ける。前輪8に前輪カバー19を設け、前輪カバー19前部のB軸6を支点として、補助輪1と補助輪2と補助輪フレームと補助輪組立復帰バネ23で構成される補助輪組立4を配する。段差9に補助輪組立4が噛み込みを起こしても、リンク機構12の揺動で前輪8と補助輪組立4を後退させながら浮き上がらせることで、車椅子や台車等の重心を後退させ、簡単に段差9を乗り越えるようにした。【選択図】図12


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    Title :

    CASTER CAPABLE OF GETTING OVER STEP


    Additional title:

    段差乗越えキャスター


    Contributors:

    Publication date :

    2015-07-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60B VEHICLE WHEELS , Räder für Fahrzeuge / A61G TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS , Transport, persönliche Beförderungsmittel, oder Lagerung besonders ausgebildet für Kranke oder Behinderte



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