Abstract: A sewing device (13) consists of a basic unit (13) comprising the main motor, the needle bar (27), and the take-up lever (31), and a shuttle block (24) detachably mounted thereto which comprises the shuttle (35) with the thread bobbin (36) for the lower thread. For changing an empty thread bobbin, the sewing machine mounted to a robot arm is inserted into a reception unit (21) in which the shuttle block (24) remains, whereas the basic unit (23) is moved to another shuttle block with full thread bobbin (36a) and receives it. The sewing machine does not require a time-consuming manual change of the thread bobbin for the lower thread.