Changeover device and method for changing over winding of web

A changeover method of changing over winding of a web wound about a first spindle to winding about a second spindle in a web winder of a turret winding type, wherein said first spindle is secured to a first drive shaft, said second spindle is secured to a second drive shaft, positions of said first and second drive shafts are changeable in said web winder, said changeover method comprising steps of:

• using a cutting drum and a receiving drum, said cutting drum being disposed on a first side with respect to a web path of said web, and having a cutter for cutting said web in a width direction thereof, and a small-radius portion free from contact with said web, said receiving drum being disposed on a second side with respect to said web path opposite to said first side, and having a small-radius portion free from contact with said web;
• supporting said cutting and receiving drums with a drum support mechanism in a rotatable manner and in a manner of contacting drum peripheral surfaces of said cutting and receiving drums on each other;
• stopping said cutting and receiving drums when said drum peripheral surfaces thereof are opposed to each other, to form a space for passage of said web in a non-contact manner;
• shifting said drum support mechanism between a changeover position for causing said drum peripheral surface of said receiving drum to contact said second spindle, and a ready position for keeping said drum peripheral surface of said receiving drum away from said web becoming wound about said second spindle;
• upon setting said drum support mechanism in said changeover position, causing said cutting and receiving drums to make one rotation, to cut said web;
• and
• securing a front end of said web being formed by cutting to said second spindle, for changing over winding.