Bobbin conveying system and bobbin conveying method

The invention provides a bobbin conveying system and a bobbin conveying method. The number of rows of stocker cop latches (26) provided in the stocker (20) is one greater than the number of rows of trolley cop latches (13) provided in the traveling bobbin creel trolley (10). In a state in which one row of stocker cop latches (26) is in a bobbin-free state and all of the remaining rows are suspended with empty bobbins (6), the empty bobbins (6) of a stocker (20) are replaced with full bobbins (5) of a traveling bobbin creel trolley (10) by alternately performing a first process and a second process under the control of a transport control computer (40). In the first step, a full bobbin (5) hung on one row of trolley cop latches (13) can be moved to one row of stocker cop latches (26) in a non-bobbin state. In the second step, one row of empty bobbins (6) hung on the stocker bobbin (26) are moved to one row of trolley bobbins (13) from which the full bobbins (5) have been taken out in the first step. The travel