| 摘要 |
<p>The present invention relates to a ladder wherein a foothold is formed to be rotated, comprising: a foothold wherein user′s feet are supported; a frame installed on both sides of the foothold; a ratchet installed inside the frame and formed on a side of the foothold; a fixing pin fixating the ratchet; a handle unit formed to be rotated in the frame; and a rotational shaft connecting the center between the foothold and the ratchet. When the handle unit is rotated, the rotational shaft is rotated while the ratchet is rotated.</p> |
