Weft insertion method and weft insertion device of rapier loom

Abstract

The invention discloses a weft insertiion method of a rapier loom. An object of the present invention is, in a rapier loom, to markedly reduce bending of a weft or sliding of the weft on a reed etc. occurring because of a positional relationship between the reed and a weft guide member which causes a selected weft to be arranged at a position, at which a rapier head can catch the weft, and prevent the weft from being damaged because of bending and sliding. In a weft insertion device (1) of a rapier loom, to insert a weft (2) through a guide hole (4) at a tip end part of a weft guide lever (3)and to guide the weft (2) connected to a woven fabric (6) to a catchable position of a rapier head (7), the weft guide lever can reciprocate between first and second positions (P1: retreat position, P2: guide position). The guide hole (4) is located at the second position (P2) at start of weft insertion so that the rapier head (7) catches the weft (2). Then, before beating up, the weft guide lever (3) is driven to move the guide hole (4) toward the first position (P1), thereby markedly reducing bending of the warp (2) and sliding thereof on a reed (12) etc. because of a positional relationship between the weft guide lever (3) and the reed (12) and preventing the weft (2) from being damaged because of bending and sliding.

Description

technical field [0001] The invention relates to a weft insertion method and a device thereof for preventing weft yarns from being damaged during the weft insertion process of a rapier loom. Background technique [0002] In the rapier loom, the next weft-inserted weft is guided to a position where it can be caught by the rapier head (inserted into the rapier) (hereinafter also referred to as "capturable position"). At this time, the weft yarn connected to the weaving end on the yarn supply side of the woven fabric intersects the running path of the rapier head at the captureable position. Then, the rapier head catches the weft yarn at a position where it can be captured as it moves forward for weft insertion, and transports the weft yarn into the opening of the warp yarn for weft insertion. And, after finishing the weft insertion, the reed begins to advance toward the cloth fall (beating-up action), and the weft yarn of weft insertion is beaten at the cloth fall by the reed....

AI Technical Summary

Problems solved by technology

The weft yarn located near the guide hole may remain in the opening of the warp yarn during the next weft insertion, so the weft yarn in this part will be piled up, resulting in a decrease in the quality of the fabric

Moreover, when a yarn breakage occurs, the next weft insertion based on the weft yarn cannot be performed, so it is necessary to stop the loom and repair it.

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