Weft withdrawing device of air jet loom

A weft withdrawing device of an air jet loom comprising:

• a blow nozzle blowing a weft that is ejected from a weft insertion main nozzle and determined to be a weft insertion failure to guide the weft to a weft withdrawing passage adjacent to a weft insertion passage;
• a weft introducing duct that is integrally swingable with a sley forward and backward and to which the weft blown and guided to the weft withdrawing passage is introduced;
• a weft withdrawing mechanism provided on the weft withdrawing passage, and withdrawing the weft guided to the weft introducing duct by a pair of rollers;
• and
• a weft sensor optically detecting the weft that is withdrawn through the weft withdrawing passage, wherein
• the weft withdrawing device of the air jet loom includes a weft guide member having a guide recess to which the weft is introduced and supporting the weft sensor at a position where the weft sensor detects the weft introduced to the guide recess,
• the weft guide member includes a cloth fell side top portion having a top portion near a cloth fell and forming the guide recess and a let-off side top portion having a top portion near the warps to be let-off and forming the guide recess, and
• the cloth fell side top portion is located above the weft withdrawing passage in a state before the pair of the rollers is brought into press-contact with the weft.