Stapling apparatus

1. A stapling apparatus comprising:

a base frame including:

a horizontal slot;

branch slots that branch from inner portions of the horizontal slot while being spaced apart from both end portions of the horizontal slot by a predetermined distance;

rotation restricting plates protruding from a branch portion between the branch slots and the horizontal slot, respectively; and

a movement guide shaft provided in parallel to the horizontal slot;

a driving belt coupled with a driving wheel of a driving motor to rotate the driving belt while being installed parallel to the movement guide shaft;

a movable frame having one side fixed to the movement guide shaft and an opposite side fixed to the driving belt so that the movable frame is movable to a left or a right along the movement guide shaft mounted on the base frame and provided at a central portion of a horizontal plane thereof with a guide passage having a substantially C shape;

a bucket for rotating a stapler, in which a pair of first guide rollers fitted into the horizontal slot through both end portions of the substantially C-shape guide passage formed in the movable frame, and a second guide roller protruding to an outside of the horizontal slot through a central portion of the substantially C-shape guide passage formed in the movable frame are fixed to a lower portion of the bucket, and one of the first guide rollers moving along the horizontal slot is guided to move to the branch slot from the horizontal slot when the second guide roller makes contact with the rotation restricting plate so that the bucket is rotated to rotate the stapler; and

a stapler coupled with and fixed onto the bucket for rotating the stapler while being mounted on the bucket, the stapler configured to perform stapling.

2. The stapling apparatus of claim 1 , wherein the substantially C-shape guide passage formed in the movable frame is configured to restrict movement of the first guide rollers and one second guide roller fixed to the lower portion of the bucket for rotating the stapler.

3. The stapling apparatus of claim 1 , wherein the substantially C-shape guide passage formed in the movable frame is configured to allow the first guide rollers to move while making contact with both end portions of the substantially C-shape guide passage when the second guide roller fixed to the lower portion of the bucket for rotating the stapler is positioned at the central portion of the substantially C-shape guide passage.

4. The stapling apparatus of claim 1 , wherein each branch slot branching from the horizontal slot includes an inclined portion inclined with respect to the horizontal slot at a predetermined angle and a parallel portion parallel to the horizontal slot.

5. The stapling apparatus of claim 1 , further comprising a driving belt installed on the base frame to rotate in parallel to the movement guide shaft, and the movable frame is fixed to the driving belt to reciprocate along the movement guide shaft.

6. The stapling apparatus of claim 1 , wherein the second guide roller maintains a predetermined distance from the base frame if the second guide roller is positioned out of a region of the rotation restricting plate.

7. The stapling apparatus of claim 1 , wherein the substantially C-shape guide passage formed in the movable frame is an angle change passage on which the pair of first guide rollers and one second guide roller fixed to the lower portion of the bucket are movable to rotate.