| 摘要 |
PURPOSE: An attachment exchange device including a safety fixing structure is provided to prevent the separation of an attachment due to the accidental secession of the attachment and imperfect installation. CONSTITUTION: An attachment exchange device including a safety fixing structure includes a first hook(211), a fixing bar(212), and a driving means. The first hook is coupled to a second coupling device(200) on the upper portion of a first coupling member(210) by a first hook coupling portion(211(b)). The first hook restrains a first round bar(240) in the first coupling member by hinge rotation when an attachment rotates. The rear side of the first hook is equipped with a latching portion(211(a)). The fixing bar is coupled to the second coupling device on the upper side of the first hook by a fixing bar coupling portion(212(a)). When the attachment rotates, the end portion of the first hook is latched on the latching portion by hinge rotation so that the fixing bar fixes the first hook. Together with a fixing bar support(212(b)) which is formed on the other end with the fixing bar as the center. The driving means restrains the fixing bar. The driving means separates the fixing bar by moving when the attachment rotates, thereby rotating the fixing bar by a hinge. |
