Pulley device

A pulley device comprising:

• a loop string including a loop portion formed in a ring shape on one side and first and second string extension portions extending to the other side in a form bifurcated from the loop portion, the loop portion extending downward together with the first and second string extension portions when the loop string is hung on a support located on an upper side;
• a loop fixing stopper having first and second through-hole rows through which the first and second string extension portions pass, and forming a knot for fixing the loop string when the loop portion is hung on a rear surface;
• and
• a pulley including a pulley housing to which end portions of the first and second string extension portions extended through the loop fixing stopper are connected, and a pulley wheel rotatably mounted between two connecting plates of the pulley housing by a connecting shaft and having a circumference around which a groove around which a moving string passes while rotating is formed.