Reinforcing bar binder, wire reel and method for identifying wire reel

A wire reel utilized in a reinforcing bar binder comprising a control circuit and a storing chamber provided in a main body of the reinforcing bar binder for mounting the wire reel around which a wire for binding a reinforcing-bar is wound, the wire being twisted for binding the reinforcing bar after it is wound around the reinforcing bar, wherein

• the storing chamber is provided with a first detecting apparatus comprising a contact-type sensor and a second detecting apparatus;
• the wire reel is provided with a first to-be-detected portion and a second to-be-detected portion coupled to the control circuit;
• the first detecting apparatus contacts the first to-be-detected portion to detect an amount of rotation of the wire reel;
• and
• the second to-be-detected portion passing the second detecting apparatus during the amount of rotation of the wire reel detected by the first detecting apparatus is counted by the control circuit.

A wire-reel identifying method utilized with a reinforcing bar binder comprising a storing chamber provided in a main body of the reinforcing bar binder for mounting a wire reel around which a wire for binding a reinforcing-bar is wound, the wire being fed by rotating the wire reel and being twisted for binding the reinforcing bar after it is wound around the reinforcing bar, the method comprising:

• detecting with a first detecting apparatus comprising a contact-type sensor an amount of rotation of the wire reel, wherein the first detecting apparatus contacts a first to-be-detected portion provided on the wire reel;
• detecting with a second detecting apparatus a second to-be-detected portion provided on the wire reel during rotation of the wire reel detected by the first detecting apparatus;
• and
• counting the second to-be-detected portion detected by the second detecting apparatus.

A wire-reel identifying method comprising:

• providing a first to-be-detected portion and a second to-be-detected portion on a wire reel;
• detecting the first to-be-detected portion with a first detecting apparatus comprising a contact-type sensor to detect an amount of rotation of the wire reel, wherein the first detecting apparatus contacts a first to-be-detected portion;
• detecting the second to-be-detected portion with a second detecting apparatus during rotation of the wire reel;
• and
• counting with a control circuit the second to-be-detected portion detected with the second detecting apparatus to detect a type of the wire reel.