CN87107976A

CN87107976A - Reduce the method for weft waste yarn

Info

Publication number: CN87107976A
Application number: CN198787107976A
Authority: CN
Inventors: 海因里希·约瑟夫·克洛卡; 维纳·万宁
Original assignee: Kloecker Entwicklungs GmbH
Current assignee: Kloecker Entwicklungs GmbH
Priority date: 1986-11-20
Filing date: 1987-11-20
Publication date: 1988-06-01
Also published as: DE3704277A1; EP0268195A3; DE3704277C2; EP0268195A2; KR880006399A

Abstract

A kind of method and device that is used for reducing when shuttleless loom is made fabric weft waste yarn.This method comprises that parallel is inserted race retracts certain predetermined length to parallel then before closing the race position.

Description

When the invention system relates to a kind of process and device make the fabric of producing on no shuttle weaving loom, can make weft yarn loose thread waste material reach a small amount of.

When producing fabric with no shuttle weaving loom, parallel pad yarn is finished by air-flow or by an arrow shaft, under these two kinds of situations, if expect a smooth fabric edge, then the tail end of parallel must be returned again and be encased inside fabric, the loose thread that stays like this is very long.

The parallel tail end of this protrusion is cut at last forms waste material.Intact purport of the present invention is to create a kind of technology and device that reaches a small amount of parallel loose thread.

The present invention's the way that can achieve the goal is that weft yarn is drawn back behind the pad yarn again.

According to this specific Process, parallel is to stop latitude device and one by one to be positioned on the line yarn that stops after the latitude device device of pulling back and to draw, entering warp thread then dehisces, after this stopping the latitude device fixes parallel, at this moment the line yarn device of pulling back is started working, thereby the line yarn can be subjected to draw back to a certain degree, and like this, parallel the end of a thread just can reduce.Parallel is drawn with broadwise after stopping the latitude device angledly, and like this, the line yarn is pulled back device can be with parallel easier clamping when retracting motion.

Be used to realize the device of this process, it is characterized in that the line yarn device of pulling back is to be referred to constitute by a guide, this guide refer to can by one surge, the drive unit of pneumatic or power type links to each other, it can refer to guide to retract to a certain degree along weft direction, and can make guide refer to be back to again the home position.

After parallel was to a certain degree drawn back, parallel cut off at leading-in end, so arrow shaft can be introduced a parallel once more.

A kind of similar process is can constitute one section surplus at the end that parallel introducing warp thread is dehisced, and at parallel when warp thread dehisces to draw, parallel is clamped in surplus line front, thereby the surplus line is under the tension force effect and draw in warp thread and dehisce, till pulling force is eliminated.At this moment the surplus line can be introduced along the track of an angle (preferably along a zigzag).

Such as, with an arrow shaft parallel is introduced warp thread and dehisce, after arrow shaft was unclamped, then parallel just retracted a certain degree so, because the surplus parallel under the tension force effect attempts parallel is retracted always, therefore also just can make weft waste yarn reach quite few degree.

Be used to realize that this device in process is to adopt a brake that stops the motion of line yarn and wiring yarn by the line yarn guide frame after the former of being positioned on the direction, their some is that elasticity can be moved back, but also can tighten up motionless.

Concrete structure is explained as follows: the yarn guiding ring that line yarn guide frame is staggered mutually by two positions is formed, in order to form the surplus parallel, one of them yarn guiding ring is the device of pulling back as parallel, a kind of elastic pulling force that removes be applied to it (such as the power by means of spring) that closes.

Here also designed the manipulation device that stops the latitude device, it acts on the parallel mechanism that pulls back simultaneously.This device is to be made of two brakes, and first brake is in order to the braking parallel, and second brake is in order to the mechanism's braking of pulling back of line yarn, and these two brakes are alternating movements during work.These two brakes are to be connected with a common manipulation device (the preferably cam control device of pneumatic actuation).

Followingly describe this process and device in detail with reference to accompanying drawing.

Fig. 1 and Fig. 2 are first kind of processing step schematic diagrames;

Fig. 3 to Fig. 7 is second kind of processing step schematic diagram;

Fig. 8 to Fig. 9 is a device of realizing second kind of process;

Figure 10 is the pull back drive unit of device of the line yarn of working by means of the spring restoring force.

For example when adopting no shuttle weaving loom, parallel 1 can be drawn in warp thread by an arrow shaft 2 and dehisce (this numbering of using on schematic diagram 3 is represented), and 3a represents the fabric that woven.

Be the arrow shaft that is provided with two alternating movements in real work, when an arrow shaft reached the centre position of fabric, second arrow shaft taken over parallel, with the terminal of one vertical pulling to fabric.Shown in Figure 1 is the position of arrow shaft 2 after the pad yarn is finished.

This neoteric process is a parallel 1 after the pad yarn is finished, and after arrow shaft 2 is unclamped parallel simultaneously, is pulled back to a certain degree.

When adopting this process illustrated in figures 1 and 2, parallel 1 is to draw by a line yarn that stops latitude device 4 and one action after it device 5 of pulling back, draw in warp thread and dehisce by means of arrow shaft 2 then, at this moment parallel is by after stopping latitude device 4, and curve an angle at the 1a place and draw, the parallel device 5 of pulling back just can more easily be clamped parallel like this.Pad is after yarn finishes, and then arrow shaft 2 is decontroled parallels, refers to that by guide parallel that 5b constitutes, that be connected with drive unit 6 device 5 of pulling back retracts parallel to a certain degree, as shown in Figure 2.When parallel is pulled back, stop latitude device 4 parallel is tightened up.

Specifically, stop Weft handling device 4 and be the parts movably by a fixed part 4a and, promptly parallel brake 4b forms.When parallel was clamped, parts 4b pushed down parallel, and at this moment parallel is positioned on the fixed part 4a.After parallel 1 cut off, parallel was pulled back device 5 under the effect of drive unit 6 and get back to original position once more.The guide that parallel is used refers to also available yarn guiding ring or similarly part replacement with it.

Adopting another kind of as during process that Fig. 3 is extremely shown in Figure 7, its operation principle is to constitute one section surplus line of representing with circle 7 on the end that the introducing warp thread is dehisced, arrow shaft from warp thread dehisce 3 withdraw from after, at this moment stop latitude device 4 action (see figure 4)s, parallel stops to transmit, meanwhile, surplus line 7 is released, thereby arrow shaft can continue parallel is drawn in the warp thread (see figure 5) of dehiscing, just in the time just will arriving the position that warp thread dehisces to seal, arrow shaft 2 is decontroled parallel, and at this moment the surplus line retracts a certain degree (see figure 6) to parallel under the effect of tension force.This job step is pulled back device 5a by parallel and is realized.Pulling back device during beginning can be movable, when the device of pulling back retracted a certain degree with parallel, then the parallel device of pulling back was stopped (Fig. 7), at this moment gets back to the original position among Fig. 3 again, stop parallel device 4 and unclamp parallel again, after parallel cuts off, introduce a new parallel again then.

Be used to realize the visible schematic diagram 8 of this another kind of process device and 9.Here only its structure has been described with example.

Surplus line 7 forms by parallel leading truck 16, yarn guiding ring 8a and 8b that this leading truck has two positions to stagger mutually, the yarn guiding ring 8b here can be used as the parallel device 5a that pulls back, and it is the active force of spring 9 (for example by means of) of closing under the elastic pulling force effect that removes a kind of.Specifically, a guide post 10 is housed on the yarn guiding ring 8b, it links to each other with spring 9.

Be one in the front of surplus line 7 and stop latitude device 4, its critical piece is a brake block 11, parallel 1 is clamped on the braking surface 12 of fixture 14 with this brake block, the drive unit of brake block can be that employing is pneumatic, also can drive second brake block 13 this moment, it is motionless that guide post 10 is clamped, and be fastened with the parallel device 5a that pulls back at an end of guide post.Working method is an alternative expression.

When stopping latitude device 4 when clamping under the effect of brake block 11 and with parallel 1, the parallel device 5a that pulls back just can freely turn round.

When parallel pulls back to a certain degree, the device 5a that pulls back then is in original position again, tighten up by second brake block 13 then, at this moment stop Weft handling device 4 and loosen parallel 1, thereby can draw in warp thread freely by means of arrow shaft dehisces, until the exit that arrow shaft is dehisced near warp thread, at this moment aforesaid work begins again.

These two

brake block

11 and 13 are to be linked to each other by a common application piston 15, so these two brake block alternately act on the fixed part 14.

Figure 10 is the pull back drive unit schematic diagram of device 5a of the parallel that has a back-moving spring 9.Guide post 10 moves together with the device 5a that pulls back is subjected to turning cam 19 effects, and a teleflex hawser 18 between cam 19 and the guide post 10 acts on as connection.The device of pulling back moves against the anti-power of work of spring 9, and the spring restoring force device of will pulling back sends back to original position again.Certainly, drive unit also can adopt other form, for example use pneumatic, if but its guide post also drive by turning cam.

Certainly, the device 5a that pulls back also can finish by arrow shaft pulling in principle against the motion of spring 9 active forces.In order to reach higher accuracy, then must possess this drive unit.

Claims

1, this process is for the fabric that weaves at no shuttle weaving loom reaches indivisible weft waste yarn, is characterized in that parallel returns a certain part at the pad yarn after finishing.

2, process as claimed in claim 1

Be characterized in that parallel stops latitude device (4) and parallel that is attached thereto by one and returns and draw mechanism (5) and draw, draw in warp thread then and dehisce that parallel (1) clamps by stopping latitude device (4) subsequently, parallel returned and drew mechanism (5) operation this moment.

3, process as claimed in claim 2

Be characterized in that parallel (1) is continuing to introduce along shape track at an angle by stopping latitude device (4) back again.

4, process as claimed in claim 1

Be characterized in that parallel has some surpluses (7) introducing the end that warp thread dehisces, when parallel when shed open is drawn, parallel is clamped at arrival end, has therefore formed tension force in parallel.Parallel is being had no progeny from intake one end-grain cutting, and under the tension force effect and draw in shed open, till pulling force is eliminated, thereby parallel can retract a certain degree.

5, process as claimed in claim 4

Being characterized in having a certain degree one section of parallel surplus along broadwise shape, the track of (as in a zigzag) introduces.

6, realize the device of claim 1 or 2 processes

Be characterized in that the parallel device (5) of pulling back refers to constitute (5b) by the parallel lead, it can by for example surge, pneumatic or electronic mode and being connected with a drive unit (6).

7, realize the device of process in the claim 4

Be characterized in adopting one to stop stop latitude device and one of the motion of line yarn to be contained in the line yarn by the line yarn guider framework (16) on the direction, its some is the elasticity flexible, also can tighten up motionless.

8, device as claimed in claim 7

Be characterized on parallel leading truck (16), being equipped with the yarn guiding ring (8a that staggers mutually two positions, 8b), yarn guiding ring here can be used as the parallel device (5a) of pulling back, and it is in a kind of close under the elastic pulling force effect that the removes active force of spring (for example by means of).

9, device as claimed in claim 7

Be characterized in being equipped with the device that a manipulation stops latitude device (4) usefulness, it returns parallel and draws mechanism and also work.

10, device as claimed in claim 9

The manipulation that is characterized in stopping latitude device (4) is to be made of two brakings partly, and first brake (11) is with so that the parallel stop motion, and second brake (13) is used for fixing the parallel device (5a) of pulling back, and these two brakes are alternating movements during work.

11, as the device of claim 10

Be characterized in two brakes by a common manipulation device control, for example by same application piston control.

12, device as claimed in claim 8

Be characterized in that parallel pulls back device (5a) under the effect of a back-moving spring (9), nationality helps a drive unit (for example rotating cam) and carries out work.