JPH01124662A - Shuttle - Google Patents

Abstract

PURPOSE: To maintain a relatively large tube cop in a trough securely by installing a special thread braking device on the way of a thread-feeding slit from the trough to a thread-drawing port of a shuttle. CONSTITUTION: This shuttle 10 is provided by installing a thread braking device 13 equipped with a braking slit 29 consisting of a pair of braking claws 21, 22 on the way of a thread-feeding slit 16 installed from a trough 11 to its tip as linearly penetrated and positioned at an opposite side to a cop clumping device 12 of the shuttle 10. The thread-braking device 13 is preferably installed so as to be in contact with the trough 11.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a trough, particularly for a weaving machine for processing tubular tops, comprising an upwardly open trough and a clamping device for fitting an exchangeable weft bobbin mounted near the end therein. Regarding Shirttle.

Shirttles of this type for weft reels have been known for some time in many embodiments. However, weft thread reels of this type are only used in limited lengths for reasons of weaving technology and, because of the full length reel core, only relatively small amounts of weft thread can be accommodated. Therefore, especially in shirttles for wide looms with a working width of less than 30 meters, the carried weft length is consumed in a very short time, so that the replacement points in the fabric are close to each other, and the weft ends of the old weft reel and For the new weft, the points of overlap of the weft start of the yarn reel must be distributed over the width of the fabric.

Because of this process, called weft expansion, the loom has to be stopped and some of the last weft taken in is pulled out through the upper channel and cut, and then the shirttle fed on the new weft reel is approximately 1-2 The weft ends of the fabric overlap slightly as they are pushed through the upper channel at centimeters apart and manually fed into the shirttle box. This mode of operation not only requires very intensive work, but also leads to significant downtime of the loom, so that the loom can only be operated at an efficiency of 50 to 60 percent.

Due to the relatively large weft length of tubecot tops, attempts have already been made to use shirttles for tubecot tops in order to extend the time available for the production of endlessly woven paper machine overlays, in this case for internal drawers. To retain the tube tip, the side wall of the trough is provided with brush ears, toothed rails, or a tin plate, which engage the outer periphery of the tube tip. These attempts were not successful, however, as the undesirable displacement and early collapse of the tube-cot tip could not be prevented by the shuttle reciprocating at high speeds, and the This is because the uncontrollable ballooning that occurs in the shuttlecock further causes malfunctions. It has also not been possible to achieve a sufficiently reliable automatic exchange of tube tips in shuttles.

The object of the invention is to create a shirt tor of the type mentioned at the outset, which allows a reliable retention of relatively large tube tips in the shirt tor in a simple manner and an automatic, almost trouble-free replacement of the tubing tips. .

In order to solve this problem, a shirttle of the type mentioned at the outset is provided according to the invention with the features of claim 1.

The yarn feed slit, which runs straight through the trough of the brake slit of the yarn brake device in line with the yarn feed slit, enables a reliable automatic insertion of the yarn of a new weft bobbin. When using a tube tip that is tied down and has a starting end that can be fitted into a tightening device and a tip end for external withdrawal, the positive seating of the tube tip that is held on one end in the trough and the clearly extended This allows for less trouble-free operation with replacement intervals and higher efficiency of the loom.

Other advantageous configurations of this shuttlecock are as described in the following claims.

Preferred embodiments of the shuttlecock will be further described below with reference to the accompanying drawings.

The shirttle 10 shown in FIG. 1 has smooth walls,
It has an elongated upwardly open trough 11 with two spring-loaded clamping pawls 15 opposite each associated side wall of the shuttlecock 10. At the other end of the trough 11 a thread brake 13 is inserted into the shuttlecock 10. The yarn feed slit 16, which is recessed at the upper side in the adjacent end portion of the shirt handle 10, is aligned with the longitudinal axis of the tube tip placed in the trough 11, and this tube tip is separated from the conical tip end 1 for external withdrawal. an extension 4 which is firmly tied to the tip spool at the distal end of the spool;
The tubular tip is fitted into a clamping pawl 15, whereby the tubular tip is held in alignment with one end in the trough 11. The cot spun yarn 17 coming out of the tubular spp is put into the yarn feeding slit 16 and the slit of the yarn braking device 13 arranged in the same row as this. A conventional yarn feeding device 14 branches off laterally from the yarn feeding slit 16, into which the thread spool 17 snaps itself together with a tightening device 12 at the end of the shirt tulle during movement of the shirt tulle IO.

The trough 11 has a remaining part between the thread braking device 13 and the tip end 10, in which, in the case of automatic tip changing, the trough 11 has a part which, in the case of automatic tip changing, is described in the applicant's parallel European patent application relating to a tube tip changing device of the same filing date. The thread gripper descends,
The spun yarn 17 is automatically introduced into the yarn brake 13 and the yarn feed slit 16.

The thread braking device 13, which is shown enlarged in FIG. It forms a braking slit. The brake pawls 21 and 22 are pressed together by a coil spring 25, the spring force of which can be adjusted by means of an adjusting screw 26 which can be twisted in a threaded hole in the casing 20.

A brake slit and a brake pawl 2 are provided at both ends of the casing 20.
Each spring retainer 27 is arranged with retainer slits 29 aligned between 1 and 22. Each spring retainer 27 has guide bolts 2 on opposite sides of the retainer slit 29.
8, which include two closing springs 30 with extended free end portions 31, which pass laterally through the retainer slit 29 in opposite directions and resist the force of the closing springs 30. It can be deflected downward by turning.

The exchange of the tube tip is advantageously carried out by a tube tip changer of the type described in a parallel European patent application by the applicant of the same filing date. In this case, the retaining pivot of the deflated tip, which is held by a spring in the clamping pawl 15, is provided by a tip release punch that can exit through a through hole at the bottom of the shuttlecock 10.
It is ejected from the shirt bolt 10 and then a new tube tip is pushed into the clamping pawl 15 with its holding pivot by a tip push punch. The new tube tip thread 17 is captured by two spaced apart thread grippers, one of which is lowered into the part of the trough 11 between the thread brake 13 and the tube tip;
The other is lowered outside the shirttle end, so that the thread 17, which is tightly tensioned between them, is introduced into this time feed thread slit 16 and into the braking slit and into the retainer slit 29 of the thread braking device 13; The downwardly pivoted end portion 31 of the closure spring 30 springs back into its rest position, thus preventing an undesired slippage of the spun yarn 17 from the yarn brake 13.

The shuttlecock described above using a preferred embodiment is
Depending on the requirements of the individual case, a person skilled in the art can tailor this in various ways, as long as a yarn brake device is used, with a yarn feed slit running straight from the trough to the end of the shirttle and a brake slit in the same row. be able to.

[Brief explanation of the drawing]

FIG. 1 shows a schematic plan view of the shuttlecock, and FIG. 2 shows a schematic plan view of the thread braking device. 11...Trough 12...Tightening device 13
... Yarn braking device 16 ... Yarn feeding slit 17 ...
・Kop thread 21.22...Brake pawl 25...
Spring device (coil spring) 26... Adjustment element (8-section screw) 27... Spring retainer 29... Retainer slit 3
0... Closing spring 27-30... Device 3 receives first
1... terminal part

Claims (9)

[Claims] (1) A shuttle, especially for a loom processing tube cops, comprising an upwardly open trough and a clamping device mounted near the end therein for fitting an exchangeable weft bobbin, the trough ( 11) to the end of the shuttle farthest from the tightening device (12), and a yarn feeding slit (16) extending almost linearly through the shuttle end distal to the tightening device (12);
2) and a yarn braking device (13) comprising a braking slit (29) formed between the yarn feeding slit (16) and the same line as the yarn feeding slit (16). 2. Shuttle according to claim 1, characterized in that the yarn brake (13) is arranged in the end part of the trough (11) adjoining the yarn feed slit (16). (3) A patent characterized in that the yarn feed slit (16) and the brake slit (29) of the yarn brake device (13) are aligned with the longitudinal axis of the tube cup that is inserted into the clamping device (12). A shuttle according to claim 1 or 2. (4) A trough (11) for accommodating a tube cup, which is snapped into the clamping device (12) with a tied starting end for external removal, has a smooth side wall and a cop thread (17). ) into the yarn feed slit (16) and the yarn brake device (13), with a portion remaining between the cop end and the yarn brake device (13) or the yarn brake device (16) for lowering the yarn gripper. A shuttle according to any one of claims 1 to 3, characterized in that: (5) Any one of claims 1 to 4, characterized in that the thread brake device (13) comprises brake pawls (21, 22) pressed together by a spring device (25). Shuttle as described in. (6) The thread braking device (13) comprises at least one thread receiving device (27-30) arranged before and/or after the brake pawls (21, 22), the thread receiving device being able to handle the cop thread (17). The closing spring (3) is displaced during insertion into the thread braking device (13) and then springs back blocking the outlet.
0) The shuttle according to any one of claims 1 to 5, characterized in that the shuttle comprises: 0). (7) The thread braking device (13) is provided with spring retainers (27) installed before and after the brake pawls (21, 22), each of which has one retainer slit (29) in the same row as the brake slit.
, or each with two closing springs (30) arranged on opposite sides thereof, the free end part (31) of which in the rest position passes transversely through the retainer slit (29) in the opposite direction and is fitted into a cup. 7. Shuttle according to claim 6, characterized in that it can be pivoted elastically downwards from the thread (17) to its penetration. (8) Claims 5 to 7 characterized by a coil spring (25) pressing the brake pawls (21, 22) together and an adjusting element (26) for adjusting the spring force thereof. Shuttle listed in any one. (9) characterized in that the trough (11) is designed to accommodate a tube cup with a cup spool having a length of at least 30 centimeters, with a shrink-fit jacket cover made of plastic shrink foil; A shuttle according to any one of claims 1 to 8.