DOOR OPENING AND CLOSING DEVICE

摘要

Provided is a door opening and closing device which is small in width and capable of stabilizing the operation of a retractable arm. The door opening and closing device has an arm block 121 of a retractable arm 104 which is provided in a body case 102 elongated in one direction and rotates from an open state to a closed state. At one side of the body case 102, a first slider 134 is provided which moves linearly in one direction in conjunction with rotation of the arm block 121. At ah opposite side of the body case 102, a second slider 131 is provided to sandwich an arm axis 105 as a rotational center of the arm block 121 between the first slider 134 and the second slider 131. The second slider 131 moves linearly in the one direction in conjunction with rotation of the arm block 121. At the one side of the body case 102, a biasing member 128 is provided for biasing the first slider 134 in one direction, and at the opposite side of the body case 102, a damper is provided for resisting linear movement of the second slider 131.