| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a door auto-closer capable of precisely detecting hook rotation positions. <P>SOLUTION: This door auto-closer consists of a detection means provided at a hook 17 to detect its rotation position, first and second protrusions 45 and 47 protruding toward a pin 21 of the hook 17 (toward a rotation shaft) and located centering around the pin 21 of the hook 17 (the rotation shaft), a lever that can contact the first and second protrusions 45 an 47, and first and second switches 55 and 57 which respond and move when the lever strikes the first or second protrusion 45 or 47. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
