| 摘要 |
<p>The present invention relates to a caster. The caster comprises: an installation plate installed in a transportation tool; a wheel housing installed to be rotated in a lower surface of the installation plate by means of a bearing and a bearing housing and where a wheel is installed to roll; and a fixing bolt coupling the wheel housing and the bearing housing and the installation plate. The wheel housing is made of a stainless steel and has a forming groove protruding toward one side in a bent boundary portion. The caster has a spring installed between the wheel housing and the fixing bolt to provide a returning force to the wheel housing.</p> |
