Clipping instrument for an endoscopic surgical device

A clipping instrument for an endoscope, comprising:

• a flexible sheath to be inserted into an instrument channel of the endoscope;
• an operation wire, which is configured to be forwarded and retracted in an axial direction of the flexible sheath;
• and
• at least one detachable clip assembly, including a pair of openable and closable clipping arms and a fastening ring to encircle proximal portions of the clipping arms, arranged in vicinity of a distal end portion of the flexible sheath with the clipping arms closed, the clipping arms being configured to be projected forward and rotated in opening directions to open outside the flexible sheath to self-openable positions, in which the clipping arms are opened by an effect of the fastening ring to their self-openable extent, and to be rotated in closing directions to clip onto a treatment object outside the flexible sheath according to forwarding and retracting movements of the fastening ring through the operation wire,
• wherein the pair of clipping arms are configured to be respectively rotatable about an axis independently from the movement of the fastening ring by external force;
• and
• wherein at least one of the clipping arms can be further opened extendedly from the self-openable position by the external force.