Fastening device and fastening system including the same

A fastening device comprising:

• a support portion including a first end portion and a second end portion, and a central portion between the first end portion and the second end portion;
• a first pulley, a second pulley, and a third pulley rotatably disposed about a first shaft, a second shaft, and a third shaft disposed on the central portion, the first end portion, and the second end portion, respectively;
• a first connection portion and a second connection portion respectively rotatably disposed on the first end portion and the second end portion, and respectively connected to the second pulley and the third pulley;
• a first fastening tool and a second fastening tool respectively connected to the first connection portion and the second connection portion;
• and
• a motor generating a force for rotating the first pulley, the second pulley, and the third pulley,
• wherein the force generated by the motor simultaneously rotates the first fastening tool and the second fastening tool relative to the support portion.

A fastening device comprising:

• a support portion including a first end portion and a second end portion, and a central portion between the first end portion and the second end portion;
• a first pulley, a second pulley, and a third pulley rotatably disposed about a first shaft, a second shaft, and a third shaft on the central portion, the first end portion, and the second end portion, respectively;
• a first connection portion and a second connection portion respectively rotatably disposed on the first end portion and the second end portion and respectively connected to the second pulley and the third pulley;
• a first fastening tool and a second fastening tool respectively connected to the first connection portion and the second connection portion;
• a motor generating a force for rotating the first pulley, the second pulley, and the third pulley;
• and
• a motor controller for controlling the motor,
• wherein the force is provided to the first pulley by the motor controller, the force is transmitted from the first pulley to the second pulley and the third pulley, and the first connection portion and the second connection portion rotate, relative to the support portion, by the force transmitted to the second pulley and the third pulley.