| 摘要 |
A marking apparatus is provided to prevent a breakage of a driven pin or a lifting shaft due to an external impact by absorbing the external impact through a rigid body structure including a couple of props and a horizontal shaft between the props. A marking apparatus comprises a single point support structure including a couple of props(8) and a horizontal shaft(10) fixed on the upper part of the props by passing through a lateral through-hole(9) formed on a moving part(2). The lateral through-hole has a diameter larger than that of the horizontal shaft. Conical concaves are formed on the upper surface of the horizontal shaft and the inner lower surface of the lateral through-hole, respectively. A single point support spherical body(13) is installed between the conical concaves. A spring(14) is installed between the lower surface of the horizontal shaft and the inner upper surface of the lateral through-hole to prevent the moving part from being separated.
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