JPS5881653A - Auxiliary nozzle jet control apparatus of air jet type loom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an auxiliary nozzle injection control device for an air injection type loom having an auxiliary nozzle.

In this type of air injection loom, as shown in Figure 1, in addition to the main nozzle, there are auxiliary nozzle groups divided into groups each having a predetermined number of auxiliary nozzles, so that the main jet of the main nozzle They work together to make the weft threads fly. Ideally, the jetting timing of the above-mentioned auxiliary nozzle group is as shown in Fig. 2, from when the tip of the weft jetted from the main nozzle reaches near the starting point of the corresponding group until it reaches near the ending point. In other words, the injection may be carried out in a stepwise manner according to the position of the flying weft tip.

By the way, the weft threads that fly through the warp shedding riding on the jet flow from the nozzle are affected by each pick depending on the type of weft thread, the winding amount of the thread feeder, the fluff condition of the warp threads, or uneven rotation of the loom. It is known that flight speed varies greatly. No matter how the weft flight speed varies, whether it is faster or slower than the ideal weft flight speed (Is in Figure 2), the weft tip and the auxiliary airflow cannot be harmonized, causing normal weft flight. I can't do anything. If the weft flying speed is faster than the ideal weft flying speed, as shown in FIG. 4(A), even if the flying weft tip reaches the second group G2, the auxiliary nozzle of the second group G2 has not yet been injected. For this reason, the weft ends cannot be fully stretched. In addition, if the weft flying speed is slower than the ideal weft flying speed, as shown in Fig. 4 (B), even though the jetting of the auxiliary nozzles of the first group Gl has already ended, there is still no jetting. The flying weft tip is the second
Since group G2 has not been reached, the flying weft tips cannot be fully extended in this case as well. If the flying weft tips fly through the warp shedding without being fully stretched, the flying weft tips may come into contact with the warp threads, making weft insertion unstable, causing weft insertion errors, and causing problems in the operation of the loom. This is a major defect in textile quality.

It is known that even if there are such variations in the flying speed of the weft yarn, if the injection timings of each group are overlapped as shown in FIG. 3, the weft yarn can be made to fly normally. However, if the injection timings of the auxiliary nozzles in each group overlap in this way, an extra amount of air is required for the overlapped portion, which is not preferable from the viewpoint of energy saving. This invention was proposed in view of these facts, and the injection timing of each group is set to the second
To provide an auxiliary nozzle injection control device for an air injection type shuttleless loom capable of sufficiently stretching the tip of a flying weft yarn and making it fly even if the flying speed of the weft yarn varies as shown in the figure, without overlapping it. The purpose is to

That is, the gist of the present invention is that the auxiliary nozzles of the group that injects subsequent to the at least one auxiliary nozzle located on the opposite yarn feeding side of the auxiliary nozzle group of the group that injects in advance At least one of these should be placed. In the following description, for convenience of explanation, four auxiliary nozzles are arranged in each group, and four groups are provided, but the present invention is not limited to this. It goes without saying that the number of auxiliary nozzles to be provided in one group and the number of groups to be provided may be determined as appropriate.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The auxiliary nozzle injection control device for an air injection loom according to the present invention will be described in more detail below with reference to the accompanying drawings.

As shown in Figure 5, there are multiple auxiliary nozzles on the sley (not shown)! a~Id, Ia~Id+ Ia~Id, rVa
~IVd are arranged according to the weaving width. The auxiliary nozzles are divided into four groups (1 to GIV), and the last auxiliary nozzle Td of the first group
One of the auxiliary nozzles of the second group GW Ia is on the upstream side (yarn feeding side) of Ic and downstream (anti-yarn feeding side) of Ic.
are arranged at equal intervals to the arrangement interval of the auxiliary nozzles Ia to Id of the first group Gl, and the first group Gl
! The last auxiliary nozzle Id is arranged between the auxiliary nozzle Im of the second group GM and the second auxiliary nozzle Ib of the second group. Further, the first auxiliary nozzle Ia of the third group GW is arranged upstream of the last auxiliary nozzle ld of the second group G1 and downstream of LE, and the first auxiliary nozzle Ia of the third group The difference between the first and second auxiliary nozzles Wb is the group G It of [2].
The last auxiliary nozzle, 1 d, is located. Furthermore, the first auxiliary nozzle IVa of the fourth group GIV is arranged between the auxiliary nozzles Ilc and ld of the third group GW. The last auxiliary nozzle Id in the group that injects in advance in this way , Ild, the first auxiliary nozzle of the group II a tIa, IV which is injected subsequent to the upstream side of Id.
a, even if the flying speed of the weft injected from the main nozzle is faster than the ideal flying speed, the next group, for example the second Although the auxiliary nozzles Ia to Id of group GW have not yet injected, the last auxiliary nozzle Id of the first group GL arranged in the second group is injecting, and the flying weft An auxiliary jet can be applied, and the tip of the flying weft can be sufficiently stretched.

On the other hand, if the flying speed of the weft yarn is slower than the ideal flying speed, for example, the injection of the first group G1 has ended, but the jetting of the first group G1 has ended, as shown in FIG. 6 CB). Group G
Since the auxiliary nozzle Ia of the second group Gl is arranged upstream of the last auxiliary nozzle Id of Gl, the auxiliary jet can be applied to the flying weft tip in this case as well.

In addition, when the flying speed of the weft is the same as the ideal flying speed Is, that is, when the flying is normal, the flying weft ends are The auxiliary nozzle located at is not spraying.

However, even in this case, since the tip of the flying weft is sandwiched between the auxiliary nozzles that eject back and forth, a strong jet flow is generated near the tip of the weft, as shown in Fig. 4 (A).
) A stronger auxiliary jet flow can be applied to the weft tip than that shown in CB).

In the above explanation, one of the auxiliary nozzles for subsequent injection
Although the book is arranged in the auxiliary nozzle row that ejects books in advance, the present invention is not limited thereto, and depending on the situation, the arrangement may be as shown in FIGS. 7 to 9.

According to this invention, the ejection periods of the auxiliary nozzles of each group are overlapped over a long period of time. , Crab Baratti, which has a fast weft flight, is advantageous in that the tip of the flying weft can be fully extended, and the air consumption required for auxiliary jetting can be greatly reduced.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the grouping of auxiliary nozzles in the auxiliary injection device of a conventional air injection loom, and Fig. 2 shows the injection timing of the auxiliary nozzles when the weft runs at the ideal flying speed. An explanatory diagram showing the relationship with the weft tip arrival position, Fig. 3 is an explanatory diagram showing the conventional auxiliary nozzle injection timing, and Figs. 4 (A) and (B) are the cases in which there is no overlapping auxiliary nozzle injection timing. An explanatory diagram showing a case where the flying speed of the weft yarn and the auxiliary jet are not in harmony, FIG. )(B)(C)(D) are explanatory diagrams showing the working state of the present invention, and FIGS. 7, 8, and 9 are explanatory diagrams showing other embodiments of the present invention. MN... Main nozzle IS... Weft tip positions 1a-ld, 2a-2d, 3a-3d when flying at the ideal flying speed. 4 a to 4 d, I a to I d, I a to I
d. Seal a~Id, IVa~
IVd, Ia' to If'. 11a'~If'...Auxiliary nozzle patent applicant Tsudakoma Kogyo Co., Ltd.

Claims (1)

[Scope of Claims] A type in which the weft yarn injected from the main nozzle is caused to fly through cooperation between the jet stream of the main nozzle and the stepwise jet stream of the auxiliary nozzle group divided into each group, which At a predetermined position on the upstream side of at least one auxiliary nozzle located on the opposite yarn feeding side in the auxiliary nozzle group of the group that injects, there is a auxiliary nozzle group of the auxiliary nozzle group of group 1 that injects subsequent to the group. An auxiliary nozzle injection control device for an air injection loom, characterized in that at least one of the following is disposed.