Pusher system for a strapping machine

A pusher system for a strapping machine, comprising:

• a housing having a first end, a second end, and a guiding channel, wherein said guiding channel is disposed between said first end and said second end;
• a pair of conveyors disposed on said housing, said guiding channel being positioned between said conveyors for allowing a working object to be moved on said conveyors;
• said working object having a bottom that has a front edge and a rear edge, a length of said working object being defined between said front end and said rear end;
• and
• a driving system mounted in said housing and corresponding to said guiding channel, said driving system having a horizontal moving portion and a vertical moving portion, said horizontal moving portion being able to move between a first position and a second position horizontally, said vertical moving portion being mounted on said horizontal moving portion and is able to move up or down, said vertical moving portion including a pusher for pushing said working object moving forward;
• wherein said pusher system for a strapping machine further comprising a first detector and a controller;
• said first detector being disposed on a top surface of said pusher and said first detector connecting with said controller electrically;
• so that as said horizontal moving portion moves from said second position toward said first position, when said first detector detects said rear edge of said working object, said controller is able to stop said horizontal moving portion and to set an actual pushing position;
• so as to reset that said horizontal moving portion only moving between said actual pushing position and said second position for shortening a moving time and a moving distance of said horizontal moving portion;
• wherein
• said vertical moving portion of said driving system includes a vertical rail so that said pusher can move up or down along said vertical rail;
• said driving system further comprising a horizontal driving portion and a vertical driving portion;
• said horizontal driving portion including:
• a horizontal power device having a motor, a power chain gear, and an auxiliary chain gear, said motor connecting with said controller electrically and being able to drive said power chain gear;
• a chain disposed on said power chain gear and said auxiliary chain gear, said horizontal moving portion being secured on said chain;
• so that said controller can control said motor to drive said chain moving and make said horizontal moving portion being movable among said first position, said second position and said actual position;
• and
• said vertical driving portion including:
• a power cylinder and a protruding rod;
• said power cylinder connecting with said controller electrically, said protruding rod having two ends, one end of said protruding rod being disposed inside said power cylinder, the other end of said protruding rod being connected with said pusher;
• so that said controller can control said power cylinder to make the protruding rod in or out so as to make said pusher moving up or down on said horizontal moving portion.