Clip treatment tool

A clip treatment tool comprising:

• an operating part;
• a clip;
• a sheath part;
• and
• a clip removal part,
• wherein the clip is attachably and detachably disposed at a distal end of the sheath part and the operating part is attached to a proximal end of the sheath part,
• wherein the clip includes
• a clip body having two or more arms that are opened and closed,
• a clip locking part that locks the two or more arms to a closed state after the two or more arms of the clip body are brought into an open state by an operation of the operating part, the two or more arms are brought into the closed state in a state where distal ends of the two or more arms brought into the open state are pressed against a treatment part, and the treatment part is ligated by the distal ends of the two or more arms brought into the closed state,
• a tubular retaining pipe that houses a proximal end of the clip body,
• a spring member that biases the clip body housed within the retaining pipe to a distal side of the retaining pipe, and
• a movement regulating part that restricts the clip body from jumping out of a distal end of the retaining pipe in a case where the clip removal part releases the locking and the spring member is extended to relatively move the clip body to the distal side of the retaining pipe,
• wherein the clip removal part releases the locking to the closed state of the two or more arms of the clip indwelled in the treatment part after the clip of which the two or more arms are locked to the closed state by the clip locking part are separated from the sheath part and indwelled in the treatment part by the operation of the operating part, to bring the two or more arms into the open state as the locking is released, and holds and removes the clip removed from the treatment part,
• wherein the two or more arms are protruded from the distal end of the retaining pipe to be in the open state and the two or more arms protruded from the distal end of the retaining pipe are housed within the retaining pipe to be in the closed state by the operation of the operating part,
• wherein the clip locking part has protruding parts provided in the two or more arms, and an opening part provided in a proximal end of the retaining pipe,
• wherein, in a case where the clip body is relatively moved to a proximal side of the retaining pipe, and an external diameter of the protruding parts that is a diameter of a circumscribed circle circumscribed on distal ends of the protruding parts of the two or more arms becomes smaller than an internal diameter of the opening part that is a diameter of an inscribed circle inscribed on an opening of the opening part, so that the protruding parts exceeds the opening part, the external diameter of the protruding parts becomes larger than the internal diameter of the opening part, and the protruding parts and the opening part are engaged with each other, so that the two or more arms are locked to the closed state,
• wherein the spring member is compressed as the clip body is relatively moved to the proximal side of the retaining pipe, and the two or more arms are locked to the closed state in a state where the clip body is biased to the distal side of the retaining pipe by the spring member,
• wherein the spring member is extended to relatively move the clip body to the distal side of the retaining pipe in a case where the locking is released, and the two or more arms are protruded from the distal end of the retaining pipe to be in the open state,
• wherein the clip removal part reduces the external diameter of the protruding parts to be equal to or less than the internal diameter of the opening part, releases the locking by releasing the engagement between the protruding parts and the opening part, and the spring member is extended to relatively move the clip body to the distal side of the retaining pipe in a case where the locking is released, and the two or more arms are protruded from the distal end of the retaining pipe to be in the open state.