Method for preventing selector hook magnetization of weft selection device used in rapier loom and structure thereof

摘要

The weft selection device returns the selector hook 10 to the return spring. However, since the number of rotations of the loom is increased recently, the residual magnetic force remains in the core 11, so that the selector hook 10, The core 11 is magnetically influenced and can not be released instantaneously. As a result, the operation relationship between the selector hook 10 and the selector lever 16 acts as an error, causing malfunction of the selection of weft yarns. The selector hook 10 which rotates around the selector hook 103 has a problem that operation is not smooth due to friction between the outer periphery of the selector shaft 103 and the inner periphery of the selector hook 10, In order to improve the loss rate of the residual magnetic force of the hook 10 and reduce the coefficient of friction of the selector hook 10 so as not to cause an error in the selection of the weft yarn 10, ) Coil 12 And the coil 12 of the other core 11 which is not selected is supplied with the normal voltage and the reverse voltage is supplied to the coil 12 of the other core 11 in the reverse direction. The needle bearing 13 is assembled to the rotary shaft of the selector hook 10 The selector hook 10 made of pure iron and the one end of the upper portion of the core 11 are provided so as to maintain a small amount of micro clearance and the upper and lower integral spacers are provided between the core 11 and the core 11, And a structure of the weft selection device used for the weft selection device used in the looper loom in which the needle bearing 13 is assembled is provided on the axis of the pivot pin 20 on which the weft selection device 20 is rotated.