| 摘要 |
PURPOSE:To improve the holding performance for a bobbin in high-speed revolution and prevent the dropping of thread and prevent the variation of the dynamic balance state by constituting a bobbin holding member from a taper ring, spherical body, and a ring having holes. CONSTITUTION:When pressurized air is introduced from an introducing part 17 in order to release holding, a piston 14 pushes a cap 6 against a supporting spring 13, and each taper spring 2 is moved leftward through a pushing rod 10 by the reaction force of a spring 11, and a ring 4 having holes is pushed by a spring 12, and slidable movement is suppressed, and therefore, a spherical body 3 is set free, and the holding of a bobbin 9 is released. When, the bobbin is held, pressurized air is discharged, and the reverse operation is carried-out. A pin 8 for preventing idle revolution is installed between a bobbin holder shaft 1 and a spacer ring 5 for holding the pushing rod 10 and between the shaft 1 and the cap 6, and the variation of the dynamic balance is prevented. Further, by a pin 7 set between the rings 4 and 5 and between the ring 4 and the cap 6, the dropping of taking-up thread and the turn of the bobbin 9 and the ring 4 can be prevented. |
