| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a crime prevention sensor having high elasticity and high biasing force when used as a raising means for a sensor coping though its size is small and capable of preventing an excessive deformation (permanent strain) from occurring when an excessive load acts on the sensor coping. <P>SOLUTION: A leaf spring member 11 for raising the sensor coping 5 is installed between the top portion of a spandrel wall 1 or the like of a balcony and the lower surface of the sensor coping 5. The leaf spring member 11 is extended in the longitudinal direction of the sensor coping 5. Both ends 11a thereof are fitted to the top portion of the spandrel wall 1 or the like of the balcony. The projection 11c of the leaf spring member in contact with the lower surface of the sensor coping 5 is formed at the intermediate part thereof in the longitudinal direction. The recess 11d of the plate spring member is formed at both sides of the projection 11c. The recess 11d is raised from the mounting surface of the leaf spring member 11 by the pushed down stroke of the sensor coping 5. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
