| 主权项 |
1. A quick coupler comprising:
a coupler body including a first hook; a movable member including a second hook and supported in a movable manner on the coupler body; a hydraulic cylinder including a first end portion connected to the coupler body and a second end portion connected to the movable member, the hydraulic cylinder causing the movable member to move so that the second hook moves away from the first hook due to expansion of the hydraulic cylinder, and the hydraulic cylinder causing the movable member to move so that second hook moves closer to the first hook due to contraction of the hydraulic cylinder; a second connecting pin connecting the second end portion of the hydraulic cylinder and the movable member, a second lock member configured to move to a locked position and an unlocked position, the second lock member protruding into an opening of the second hook in the locked position, and the second lock member retracting from the locked position in the unlocked position; and an urging member urging the second lock member toward the locked position, the movable member including a second support hole that supports the second connecting pin in a movable manner between a lock release position and a lock actuation position along an expansion and contraction direction of the hydraulic cylinder, the second connecting pin moves from the lock release position to the lock actuation position due to the expansion of the hydraulic cylinder, the second connecting pin moves from the lock actuation position to the lock release position due to the contraction of the hydraulic cylinder, the second lock member includes a guide hole disposed so as to overlap the second support hole, the second connecting pin is inserted into the second support hole and the guide hole, and an edge of the guide hole including:
a first contact portion that is in contact with the second connecting pin while the second connecting pin is positioned in the lock actuation position,a second contact portion that is in contact with the second connecting pin while the second connecting pin is positioned in the lock release position, anda guide portion that extends in a direction that intersects a movement direction of the second connecting pin between the first contact portion and the second contact portion, and the guide portion being pressed by the second connecting pin that moves from the lock actuation position to the lock release position in order to resist an urging force of the urging member and cause the second lock member to move from the locked position to the unlocked position. |
