< Topic >As it is possible, compared to maintain a state where it is locked firmly the fixed installation of the operation instrument tool whose it is possible to miniaturize the fixed part, is offered.SolutionsIn this contact surface section of short cylindrical shape base 12a and 12b, respectively, engaging mutually, the engagement section which can regulate the mutual time motion of tubular arm 15a and 15b is formed, as pushing pressure block 22of a pair and 22b this touching to inclined section 23a and 23b with the fixing operation of final controlling element, 17 rod 21of a pair and 21b alienate mutually, lock husband Various and adjustable joint section 14a and 14b to lock the tubular arm of pair due to the fact that the engagement section engages mutually, the rod of pair is mutual by the cancellation operation of the final controlling elementAs fixing of the adjustable joint section is cancelled, in order to make the time motion of the tubular arm of pair possible due to the fact that engagement of the engagement section is cancelled, it is constituted.< Selective figure >Drawing 3【課題】固定された状態をより強固に維持することができると共に、固定部を小型化することが可能な手術用器具の固定装置を提供する。【解決手段】短円筒状基部12a,12bの当接面部に、それぞれ、互いに係合して管状アーム部15a,15bの相互の回動を規制しうる係合部が形成され、操作部17の固定操作により一対の押圧ブロック22a,22bが傾斜部23a,23bに当接して一対のロッド21a,21bが互いに離間し、夫々、自在継手部14a,14bを固定すると共に係合部が互いに係合することにより一対の管状アーム部を固定し、操作部の解除操作により一対のロッドが互いに自在継手部の固定を解除すると共に係合部の係合が解除されることにより一対の管状アーム部の回動を可能とするように構成されている。【選択図】図3
