| 摘要 |
<p>PURPOSE:To reduce parts in number so as to improve reliability by inserting a guide having a lock pin guide hole in an off-set position while being secured thereto in such a way that a plurality of fixing positions can be selected by a step of rotating the guide around the center axis line against a roof installation hole. CONSTITUTION:A rib 50A of a lock base 50 for a roof 22 is formed with an installation hole 108 having an engaging recess 108A in an approximate cross form wherein a guide 30 having a projection 30B to be engaged with the engaging recess 108A, is inserted while being secured thereto. And a guide hole which is off-set with respect to a center axis line, is formed on the guide 30 for guiding a lock pin 38. In this constitution, when any difference in step between the outer surface of the roof and the ordinary surface appears where the roof 22 is locked, the relative position between the projection 30B and the engaging recess 108A of the installation hole 108 is changed with guide 30 rotated thereby the projected position of the lock pin is corrected by making use of the eccentricity of a guide hole 110. Owing to this constitution, the constitution can be simplified so as to improve reliability.</p> |
