(57) Provided is a threading device (20) for an air jet loom (1) including a plurality
of weft insertion nozzles (5, 7) each including a nozzle body (14) in which an insertion
hole (14a) is formed and a thread guide (15) that is disposed in the insertion hole
(14a) of the nozzle body (14) and in which a thread guide hole (18) extending therethrough
in an axial direction is formed, each weft insertion nozzle (5, 7) performing weft
insertion of a weft yarn (2), which is inserted into the thread guide hole (18) of
the thread guide (15), by using a jet of compressed air that is formed when the compressed
air is supplied to the insertion hole (14a) and ejected from an ejection hole at an
end of the weft insertion nozzle (5, 7) through a space around the thread guide (15)
in the insertion hole (14a). The air jet loom (1) performs one weft insertion by cooperation
of the plurality of weft insertion nozzles (5, 7). For at least one of the plurality
of weft insertion nozzles (5, 7), the weft yarn (2) is threaded into the thread guide
hole (18) by using compressed air ejected toward the thread guide hole (18) of the
thread guide (15) from a nozzle (9) disposed behind the at least one of the weft insertion
nozzles (5, 7). The threading device (20) includes a guide unit that has a through-hole
(27) and that is provided so that a center of the through-hole (27) coincides with
a center of the thread guide hole (18) when viewed in the axial direction of the thread
guide (15) into which the weft yarn (2) is threaded by using the compressed air, and
an air discharging unit that is provided so as to be continuous with the guide unit
with respect to the axial direction and in which an inner space portion that is continuous
with a space in the through-hole (27) of the guide unit is formed so as to be connected
to the outside. The threading device (20) is disposed so as to be continuous with
a back end of the thread guide (15) with respect to the axial direction. The threading
device (20) includes the guide unit in at least an end portion thereof on an opposite
side to the thread guide side in the axial direction.
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