JP2587968B2 - Multicolor weft insertion device for fluid jet loom - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to an improvement in a multicolor weft insertion device for a fluid jet loom.

BACKGROUND OF THE INVENTION In multicolor weft insertion, a plurality of weft injection nozzles are used, depending on the number of multicolor weft insertions. These injection nozzles eject the weft yarn near the extension of the weft flight path formed on the front surface of the leg and substantially toward the center of the weft flight path.

However, when the number of multicolor weft insertions increases, some of the plurality of injection nozzles fall outside the effective area of the weft flight path, so that the weft yarn is not guided to the center of the weft flight path at the time of weft insertion. . Further, since the weft yarn injected from the injection nozzle approaches the auxiliary nozzle group along the weft flight path and is easily interfered, it is difficult to stably insert the weft.

Prior art Therefore, the inventions of JP-A-60-252753 and JP-A-61-160459 show that a plurality of weft insertion nozzles are arranged on the plane toward the entrance side of the weft flight path. . However, when the number of multicolor wefts increases, the weft insertion nozzles on the weave front side have a larger inclination angle with respect to the weft flight path, and the crossing angle between the weft insertion nozzles increases. For this reason, when the crossing angle between any of the weft insertion nozzles exceeds 15 °, the injected weft passes near the tip of the adjacent weft insertion nozzle, thereby causing the weft to enter the standby weft. A problem arises in that the insertion nozzle is entangled with the tip of the weft thread protruding from the tip. On the other hand, it is conceivable that the weft insertion nozzle is moved to the yarn feeding side in the direction of the extension of the weft flight path to reduce the intersection angle of the weft insertion nozzle. However, moving the tip of the weft insertion nozzle away from the weft flight path is not preferable because weft insertion becomes unstable, and conversely, the spacing between the yarn feed cutter and the weft insertion nozzle becomes large, so that weft insertion is not possible. There has been a problem that the length of the weft thread tip protruding from the nozzle tip also increases.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-described problem caused when a plurality of weft yarn injection nozzles are provided near the extension of the weft yarn flight path without impairing the stability of the weft insertion. Another object of the present invention is to prevent the weft from being entangled from the tip of each weft injection nozzle.

Means for Solving the Problems Under the above object, the present invention provides a plurality of weft insertion nozzles substantially parallel to each other near the extension of the weft flight path formed on the front surface of a leg, When the weft is injected by the weft injection nozzle deviating from the weft flight path on the weaving front side, a fluid control nozzle whose tip is provided at a position separated by a predetermined distance on the front side of the weaving from the axis of the weft injection nozzle. A fluid is ejected toward the inlet side of the weft flight path by the above-described method, and a combined flow of the fluid from the weft thread ejection nozzle and the fluid from the fluid control nozzle is formed by a predetermined distance from the tip of the weft thread ejection nozzle. The weft thread is formed at a distance in the direction, so that the leading end portion of the weft thread is guided into the entrance of the weft thread travel path. And the fluid control nozzle,
It is controlled by a fluid controller and preferably supplies a pressure fluid of an appropriate pressure value depending on the position of the weft injection nozzle in operation.

Configuration of the Invention FIGS. 1 and 2 are related to a fluid jet loom 1,
1 shows a multicolor filling device 2 of the present invention.

The fluid jet loom 1 includes multi-color, for example, three-color weft yarns 31, 32,
Injection nozzles 41, 42, 43 are provided to insert 33. These injection nozzles 41, 42, 43 are arranged in a plane in the opening of the warp yarn 8, near the center extension of the front open weft flight path 6 formed on the front surface of the braid 5, It is directed toward the entrance side of the weft flight path 6. Of these, the injection nozzle 41 is provided substantially on the center line of the weft flight path 6, and the other two injection nozzles 42,
43 is provided substantially parallel to the injection nozzle 41, specifically, so that the maximum crossing angle formed between any one of the injection nozzles is 10 ° or less. The two injection nozzles 42 and 43 are displaced slightly forward from the center position of the weft flight path, that is, toward the weave front 7, and as a result, are out of the substantial effective area of the weft flight path 6.

In addition, between the injection nozzles 41, 42, 43 and the warp 8,
A cutter 20 for cutting the weft thread end inserted is provided. A number of auxiliary nozzles 9 are attached along the weft flight path 6. The injection nozzles 41, 42, 43, the auxiliary nozzle 9 and the like are
It is attached to the sleigh etc.

The multicolor filling device 2 of the present invention is assembled by a fluid control nozzle 10 and a fluid controller 11.
The fluid control nozzle 10 has a tip located forward of the axis of the injection nozzle 43 closest to the weave 7 and at a position separated by a predetermined distance, and is directed toward the entrance side of the weft flight path 6. , Crossing the centerline of the weft flight path 6. The fluid controller 11 is branched by piping 14 to pressure fluid sources 12 and 13 having different pressure values, and is connected by check valves 15 and 16 and solenoid valves 17 and 18, respectively. These solenoid valves 17 and 18 operate together with the injection nozzles 42 and 43 by the weft insertion selection command device 19.

When the injection nozzle 41 injects the weft insertion fluid A, the weft yarn 31 is injected substantially toward the center of the weft flight path 6 as shown in FIG. While being urged, the warp yarn 8 is inserted into the opening.
In addition, as shown in FIG. 3, the auxiliary nozzle 9 performs a relay (sequential) injection for each group and pulls the weft yarn 31 in tension.

When the injection nozzle 42 is operated based on a command from the weft insertion selection command unit 19, the weft yarn 32 is moved together with the fluid B, as shown in FIG. From the position shifted to the side, it is inserted into the open side of the weft flight path 6. At this time, weft selection commander
19, the solenoid valve 17 is opened, and an appropriate control fluid D from the fluid control nozzle 10 is shifted from the injection nozzle 42 by a predetermined distance toward the opening side of the weft flight path 6 at a speed V1.
Inject with. As a result, after the weft thread 32 is ejected by the fluid B to a distance that does not interfere with the tip of the weft thread protruding from the tips of the standby ejection nozzles 41 and 43, the weft thread 32 and the fluid B from the ejection nozzle 42 By the combined flow with the control fluid D from the control nozzle 10, the weft flight path 6
, And are subsequently inserted substantially along the center of the weft flight path 6 while being urged by the auxiliary nozzle 9. At this time, the injection period of the fluid control nozzle 10 is slightly shorter than the injection period of the injection nozzle 42 as shown by a hatched portion in FIG. It is set to the period until you are towed.

Similarly, the next weft 33 is injected to a predetermined distance by the fluid C of the injection nozzle 43, and then guided to the entrance side of the weft flight path 6 by the combined flow of the injection nozzle 43 and the fluid control nozzle 10. After that, it is urged by the auxiliary nozzle 9 to be inserted. Here, the pressure of the pressure fluid source 13 is set slightly higher than the pressure of the pressure fluid source 12. For this reason, as shown in FIG. 5, the speed V2 is higher than the speed V1, and the injection nozzle 43 is located ahead of the adjacent injection nozzle 42,
Further, even if the weft yarn 33 is parallel to the injection nozzle 42, the weft yarn 33 is reliably guided to the center position on the entrance side of the weft yarn flight path 6 by the synthetic flow.

Thereafter, the auxiliary nozzle 9 repeats the relay injection sequentially for each group in the same manner as in the related art, so that the wefts 31, 3
Mainly pull the tip of 2, 33 in the weft insertion direction. Therefore, portions other than the leading ends of the flying weft yarns 31, 32, and 33 are not affected by the control fluid D from the fluid control nozzle 10 for a period in which the ejection period of the fluid control nozzle 10 is shorter than the ejection period of the ejection nozzle. Will fly in a straight line.

Other Embodiments of the Invention Although the above embodiment is intended for the insertion of three colors, the number of multicolors is not limited to that of this embodiment. Also,
The plurality of injection nozzles 41, 42, 43 and the fluid control nozzle 10 may be provided not three-dimensionally but three-dimensionally. At this time, the fluid control nozzles 10 are not limited to one, and the fluid control nozzles are respectively directed to the respective injection nozzles deviating forward from the weft flight path so that the synthetic flow is directed toward the inlet side center position of the weft flight path. Is provided.

Further, although the fluid control nozzle 10 stops the control fluid D during the injection period of the injection nozzle, the fluid may be continued until the end of the injection period of the injection nozzle with the pressure reduced instead of stopping. Alternatively, it may be set in the same manner as the injection period of the injection nozzle without stopping.

Effects of the Invention In the present invention, the following specific effects can be obtained.

At the time of weft insertion by the injection nozzle that is displaced forward from the weft flight path among the plurality of injection nozzles provided substantially parallel to each other, the fluid control nozzle on the weave front side injects the control fluid, and the injection nozzle and the fluid By the combined flow with the control nozzle, the leading end of the weft yarn is guided to the entrance side of the weft yarn flight path after the predetermined processing is injected by the injection nozzle. The formed crossing angle can be reduced without impairing the stability of the weft insertion, so that the entanglement of the weft yarns at the tip of the injection nozzle can be prevented.

Furthermore, since the liquid control nozzle can be set to operate only in the initial stage of the weft injection operation, the middle part of the running weft is not affected by the jet having an incident angle with respect to the weft flight path. , And will fly stably in an almost straight posture.

[Brief description of the drawings]

FIG. 1 is a plan view of the multi-color filling device of the present invention, FIG. 2 is a horizontal sectional view of the device, FIG. 3 is an explanatory view of the operation sequence of injection, and FIG. 4 and FIG. FIG. 1 ... Fluid injection loom, 2 ... Multicolor weft insertion device, 31, 3
2, 33 ... weft, 41, 42, 43 ... injection nozzle, 5 ...
Osa, 6 ... weft flight path, 10 ... fluid control nozzle,
11: Fluid controller, 19: Horizontal insertion selection commander.

Claims (1)

(57) [Claims] A plurality of weft insertion nozzles are provided substantially in parallel with each other near an extension of a weft flight path formed on a front surface of a leg. In a fluid jet loom that is displaced forward from the weft flight path, the leading end is located at a position separated by a predetermined distance in front of the axis of the weft injection nozzle on the weaving front side, and on the entrance side of the weft flight path. And a fluid controller that supplies a control fluid to the fluid control nozzle in conjunction with weft insertion by an injection nozzle that is out of the weft flight path. Multicolor weft holder.