Pivoting connection structure and crane, which is provided with a pivotable connection structure

摘要

A pivotal connection structure is provided which is capable of releasably and easily connecting a first component and a second component. The pivotable connection structure has a first component, a second component and a pivot support member and the second component is pivotally connected to the first component. The first member has a pivot shaft defining a pivot axis of the second member, and the second member has a pivotally received portion which receives the pivot shaft. The pivot support member is mounted in a rotatable manner on a side surface of the second member, and the pivot support member is provided with a restricting hole which allows insertion from an end portion of the pivot shaft received by the pivotally supported portion.