JPH0431261Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a selvage assembly device for a shuttleless loom, and particularly to a selvage assembly device of a planetary gear type.

<Conventional technology> As a selvage device for conventional shuttleless looms,
Some are described in Publication No. 20126.

This consists of a holder that is rotationally driven, a pair of hollow shafts fixed to this holder, and a pair of planetary gears rotatably attached to one end of these hollow shafts and driven by a fixed gear (for example, a sun gear). , a selvage thread guide piece fixed to these planetary gears, and a pair of selvage thread bobbins provided on the opposite side of the holder to the side where the selvage thread guide piece is disposed, and a selvage thread guide piece fixed to these planetary gears, and a selvage thread bobbin provided on the side opposite to the side where the selvage thread guide piece is disposed. After the selvage thread is passed through the hollow shaft, the selvage thread is threaded through the thread guide hole of the selvage thread guide piece, thereby opening and closing the selvage thread and giving twist to the selvage thread.

Therefore, in this case, the selvage thread is pulled out while slidingly contacting the inner circumferential surface of the fixed hollow shaft.

<Problem to be solved by the invention> However, when the selvage thread is pulled out while slidingly contacting the inner peripheral surface of the fixed hollow shaft, that is, as the selvage thread guide piece rotates, the selvage thread moves against the hollow shaft. When rotated around the inner circumferential surface, the selvage thread is twisted. For this reason, the selvage threads are either twisted or de-twisted. If this twisting or twist reduction is performed excessively, there is a problem in that the strength of the selvage thread is reduced, causing breakage of the selvage thread.

The present invention was devised in view of such conventional problems, and an object of the present invention is to make it possible to prevent selvage thread breakage, etc.

<Means for solving the problem> For this reason, the present invention fixes the planetary gear to which the selvedge thread guide piece is fixed to a hollow shaft, and rotatably attaches this hollow shaft to a holder. is rotated together with the selvage thread guide piece, and a guide portion that ultimately guides the selvage thread from the selvage thread bobbin to the inlet end of the hollow shaft is arranged approximately on an extension of the hollow portion of the hollow shaft. The selvage thread from the selvage thread bobbin is guided so as not to come into sliding contact with the entrance side end of the hollow shaft.

<Function> According to this configuration, the selvage thread does not come into contact with the entrance side end of the hollow shaft, and the hollow shaft rotates together with the selvage thread guide piece, so there is no part that causes relative movement with the selvage thread. This eliminates the possibility of twisting.

<Example> An example of the present invention will be described below based on FIGS. 1 to 4.

In FIG. 4, Y rows of warp yarns are sent through backrest rollers 2 rotatably attached to the frame 1 of the loom, are opened by healds 3, weft yarns are inserted therein, and then reeded by a reed 4. The woven fabric C is woven by striking and is wound up via the breast beam 5.

The selvage yarn device 10 according to the present invention is provided on both sides of the woven fabric C to form selvages on the woven fabric C.

As shown in FIGS. 1 to 3, a shaft 12 is fixed to a stay 11 fixed to a frame 1 of the loom with, for example, a nut 13, and a pin 14 is attached to this fixed shaft 12.
A sun gear 15 as a fixed gear is fixed via the. The fixed shaft 12 further includes a bearing 16.
A planetary gear holder 17 is rotatably attached via the. The outer teeth 17a of this planetary gear holder 17 are connected to the drive shaft 1 which rotates in conjunction with the operation of the loom.
It meshes with the gear 19 attached to 8. The hub portion of the planetary gear holder 17 includes a first planetary gear 20a,
20b is rotatably mounted, and these planetary gears 20a, 20b are meshed with the sun gear 15, respectively. Further, second planetary gears 21a, 21b are rotatably attached to the hub portion of the planetary gear holder 17, and these second planetary gears 21a, 21
b is the bearing 4 in the hub part of the planetary gear holder 17.
0a, 40b (40a is not shown) are fixed to rotatably provided hollow shafts 22a, 22b, and selvage thread guide pieces 24a, 24b having thread guide holes 23a, 23b are attached. There is.

As the drive shaft 18 rotates, the planetary gear holder 17
rotates around the fixed shaft 12, the first and second planetary gears 20a, 20b, 21a, 21b attached to the planetary gear holder 17 revolve while rotating, but this second planetary gear 21
a, 21b are 2:2 relative to the sun gear 15 so that they rotate once in the opposite direction to the revolution during one revolution.
It is made with a gear ratio of 1. Therefore, the thread guiding hole 2
3a and 23b are spaced apart from each other at the top and bottom positions, as shown by solid lines in FIG. 3, and are close to each other at left and right positions, shown by imaginary lines in FIG.

A pair of bobbin frames 25a, 25b are attached to the back surface of the planetary gear holder 17, and these bobbin frames 25a, 25b support the rotary shafts 27a, 27b of the selvage bobbins 26a, 26b. The selvage threads a, b from the selvage bobbins 26a, 26b pass through tension adjusting devices 30a, 30b, respectively, and then pass through hollow shafts 22a, 22b of the second planetary gears 21a, 21b, and enter the yarn guide holes 23 of the selvage thread guide pieces 24a, 24b.
a, 23b reach the edge portion of the woven fabric C.

The tension adjustment device 30b includes an arm 33b rotatably attached to a shaft 31b and biased by a spring 32b, and an arm 34b rotatably attached to the shaft 31b. Guide portion 35b at the tip of arm 34b,
The guide part 36b at the tip of the arm 33b is pulled through in this order, and when the tension of the selvage thread 26a increases, the arm 33b rotates counterclockwise in FIG. The ratchet 37b, which is integrated with the ratchet 34b, is operated to rotate the selvage thread bobbin 26b in the selvage thread delivery direction. The same applies to the tension adjustment device 30a.

Here, the guide portions that ultimately guide the selvage yarn from the selvage yarn bobbins 26a, 26b to the hollow shafts 22a, 22b, that is, the guide portions 36a, 36b,
The selvage threads a, b are positioned on the extension of the hollow portions of the hollow shafts 22a, 22b, and are guided so as not to come into contact with the entrance side ends of the hollow shafts 22a, 22b. In addition, tension adjustment devices 30a and 30b are used as the final guide parts.
Alternatively, a fixed guide may be provided just before the entrance of the hollow shafts 22a, 22b.

With this configuration, the hollow shafts 22a, 2
2b rotates together with the second planetary gears 21a, 21b and therefore the selvage thread guide pieces 24a, 24b, so the selvage threads a, b and the exit portions of the hollow shafts 22a, 22b do not rotate relative to each other. The selvage threads a and b at the part
There is no twist applied to the

Furthermore, the guide portions 31a, 31 are arranged so that the selvage threads a, b do not come into sliding contact with the entrance portions of the hollow shafts 22a, 22b.
Since it is guided by b, twisting is not applied to this part either.

Therefore, since the selvage threads a and b are not twisted by sliding contact, they are not cut as described above.

The manner in which the selvage threads a and b weave the selvage fabric is similar to known techniques.

In this embodiment, the sun gear 15 is used as the fixed gear, but the design can be changed to a ring-shaped internal gear. In that case, the planetary gear holder 17 has a structure that allows it to rotate around the central axis,
The planetary gear is internally engaged with the fixed ring-shaped internal gear.

<Effects of the invention> As explained above, according to the present invention, the selvage thread is not twisted when passing through the hollow shaft, so the strength of the selvage thread does not decrease, and the selvage thread is not twisted. The effect of eliminating the occurrence of cuts can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a side view of a selvedge device showing one embodiment of the present invention, FIG. 2 is a rear view thereof, FIG. 3 is a front view thereof, and FIG. 4 is a plan view of the entire loom. 15 ... sun gear, 17 ... planetary gear holder,
18: drive shaft; 20a, 20b: first planetary gears; 21a, 21b: second planetary gears; 22:
a, 22b... hollow shaft, 23a, 23b... yarn guide hole, 24a, 24b... selvedge yarn guide piece, 26a, 2
6b... Selvage bobbin, 30a, 30b... Tension adjusting device, 36a, 36b... Guide portion, 40b...
…bearing.

Claims (1)

[Scope of utility model registration request] A rotationally driven holder 17 and this holder 17
A pair of planetary gears 21a, 21b are rotatably attached to via a pair of hollow shafts 22a, 22b and driven by the fixed gear 15, and a lug thread guide piece 24a fixed to these planetary gears 21a, 21b.
24b, and a pair of selvage thread bobbins 26 provided on the side of the holder 17 opposite to the side where the selvage guide piece is disposed.
a, 26b, these selvage thread bobbins 26
The selvage threads pulled out from a and 26b are attached to the hollow shaft 22.
After passing through the selvage thread guide pieces 24a, 22b,
4b, the planetary gears 21a,
21b to the hollow shafts 22a and 22b,
The hollow shafts 22a and 22b are rotatably attached to the holder 17, and the selvage thread bobbin 26
The guide portions 36a, 36b that ultimately guide the selvage yarn from a, 26b to the inlet end of the hollow shafts 22a, 22b are arranged substantially on the extension of the hollow portions of the hollow shafts 22a, 22b. Features a selvedge device for shuttleless looms.