JPS5932382B2 - Weft feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a weft feeding device in a needle loom or the like.

This type of weft thread feeding device generally winds the weft thread around a spool and rotates the spool in synchronization with the movement of the feel carrier to feed the weft thread by a certain amount.

However, when changing the weave D width of a woven product, for example a zipper tape. It is necessary to adjust the feed amount accordingly, and since the elongation of the weft yarn changes depending on the influence of temperature and humidity, it is necessary to adjust the feed amount accordingly to maintain a constant tension. . The present invention is a weft feeding device in which the feed amount can be adjusted while keeping the number of rotations constant by changing the winding diameter of the feeding device, and in particular, the weft thread can be wound steplessly and accurately using a gear mechanism. To provide a yarn feeding device in which the diameter can be finely adjusted, the winding diameter can be finely adjusted even if a driven gear is omitted, and the winding diameter does not differ in the axial direction.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic plan view of a needle loom equipped with a weft feeding device according to the present invention, in which 1 is a weft, 2 is a reed, 3 is a warp, 4 is a feeling carrier, 5 is a latch needle,
6 is a weft feeding device, 1 is a tension absorbing device, and 8 is a weft. The weft feeding device 6 is driven in synchronization with the feeling carrier 4, and supplies the weft at a feeding amount corresponding to the amount of weft driven by the feeling carrier 4. Details of the weft feeding device are shown in FIG. 2 and below.

In FIG. 3, reference numeral 9 denotes a spool body consisting of a hollow shaft portion 10 and flange portions Ila and Ilb on both sides. The flange portions 11a, Ilb are provided with a protruding edge 12 on the periphery, and covers 13a, 13b are fitted and fixed to the outer periphery of the protruding edge 12, whereby the flange portions Ila, Ilb and the cover 13 are fitted and fixed.
Space portions 14a and 14b are formed between a and 13b. A shaft 15 is inserted into the hollow shaft portion 10 of the spool body 9 . Both ends of the shaft 15 are rotatably supported by the covers 13a and 13b, and the shaft 15 is provided with the space 1.
Main drive gears 16a, 16b are fixed to 4a, 14b. One end of the shaft 15 projects outward from the cover 13b to form a threaded portion IT, and a lock nut 18 and a knob 19 are fixed to this threaded portion IT. The main drive gears 16a and 16b have a flange portion 1 with a shaft 20.
A plurality of driven gears 21a and 21b (six on one side in the illustrated embodiment) supported by gears 1a and Ilb are in mesh with each other.

Each of the driven gears 21a, 21b has a flange portion 10a,
The inner driven gears 21a', 21b' on the 10b side and the outer driven gears 21a', 21b' on the cover 13a, 13b side are alternately combined so that the driven gears do not mesh with each other. A pin 22 is fixed to each of these driven gears 21a and 21b.
, 21b, a winding bar 23 is rotatably or fixedly supported between the pins 22, 22 of the pins 22, 21b. The flange portion 10
On the inner surfaces of a and 10b, there is an arcuate hole 24 through which the pin 22 passes.
and an arcuate guide groove 25 through which the winding bar 23 passes. A mounting hole 26 is provided in the one cover 13a.
is formed, and is fixed to the rotating shaft 27 via this mounting hole 26. With the configuration described above, when the locking nut 18 is loosened and the shaft 15 is rotated with the knob 19, the main drive gear 16
Driven gears 21a and 21b rotate via a and 16b,
As a result, the winding pin 23 moves along the guide groove 25, and the winding diameter can be varied steplessly.

As described above, according to the present invention, the meshing positions of adjacent driven gears with respect to the main drive gear are shifted in the axial direction to prevent the driven gears from interfering with each other. Even if the driven gear is rotated, the driven gear can be made to rotate only slightly, and therefore the winding diameter can be easily and finely adjusted.

In addition, since the winding bar of all degrees Celsius is supported by the gear at both ends, both ends of the winding bar move equally when the diameter is changed, and therefore, unreasonable deformation force is applied to the winding bar. The diameter can be changed smoothly and evenly on the left and right sides. Further, since the winding bar is supported between the pair of driven gears, there is no possibility of mistakes in attaching the winding bar and the assembly is simple. Furthermore, since the winding diameter is adjusted by rotating the gear, the diameter can be changed continuously and steplessly, allowing fine adjustment of the diameter.

[Brief explanation of drawings]

Fig. 1 is a schematic plan view of a needle loom equipped with a weft feeding device of the present invention, Figs. 2 to 6 show an embodiment of the weft feeding device of the present invention, and Fig. 2 is a perspective view. Figure 3 is a vertical side view, Figure 4 A is a cross-sectional view of Figure 3, Figure 4 is a sectional view corresponding to Figure 4 A in the expanded diameter state, Figures 5 and 6. are a cross-sectional view taken along line V-V and -, respectively, in FIG. 3. 9: Spool body, 10: Hollow shaft portion, 15: Shaft, 11a,
11b: Flange portion, 16a, 16b: Main drive gear, 21
a, 21b: driven gear, 23: winding bar, 25: guide groove.

Claims (1)

[Claims] 1. A spool body having flanges at both ends of a hollow shaft part, a pair of drive gears fixed on both sides of the spool body to a shaft inserted through the hollow shaft part, and a drive gear supported by the flange parts. multiple pairs of driven gears that mesh;
A winding bar supported by a pair of driven gears and disposed outside the hollow shaft part, and a guide groove in which the winding bar can move, formed in the flange part, A weft feeding device characterized in that the meshing position of the driven gear with respect to the main driven gear is shifted in the axial direction so that the driven gear does not interfere with each other.