JPH01124659A - Method for repairing cut warp yarn of loom - Google Patents

Abstract

PURPOSE: To provide the subject method enabling a warp broken between a warp beam and a warp breakage detector to be repaired automatically in an extremely short loom halting time. CONSTITUTION: This method for repairing a broken warp comprises such a practice that, one 14 of both ends 14, 15 of a warp 9A broken between a warp beam 1 mounted on a loom and a warp breakage detector 3 (made up of a drop wire 4 and a drop detective means therefor) is held by a thread holding means 11 (e.g. a suction nozzle 16), a thread 20 wound off a thread feeder 21 is then brought close to the end 14 while holding the thread 20 by the thread guide mechanism 24 of a thread knotter 19 followed by joining both the thread 20 and the end 14 together using the knotter 19, and subsequently the thread left in the guide mechanism 24 is brought close to the other end 15 to knot both the threads together.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application in Industry] The present invention relates to a method for repairing broken warp threads of a loom. In particular, the method is aimed at warp thread repair in case a break occurs between the warp thread winding and the warp thread stopping device.

[Problem to be Solved by the Invention] The present invention is intended to solve the above-mentioned repair problem so that in very many cases, the loom can be restarted after a short stoppage, and restarting of the loom is also carried out between repair cycles. The aim is to provide a method that can be implemented in a short period of time.

[Means and effects for solving the problem] The above object is directed to a method for repairing yarns according to claim 1, that is, a method for repairing broken warp yarns of a loom, especially a method for repairing warp yarns between warp yarns and a warp stopping device. positioning and gripping both ends of the broken warp yarn; taking the gripped first yarn end;
presenting a yarn drawn from a separate yarn feeding device, which is previously equipped with a yarn guiding mechanism and a yarn joining device; operating the yarn joining device to attach the yarn end to the yarn from the separate yarn feeding device; knotting the end of the first end of the thread guide mechanism so that the thread from the separate thread feeding device remains in the thread guide mechanism at the point where the second end of the thread is located; taking the gripped second end and presenting it also to a separate thread feeding device and system joining device; while the threads are knotted together, the thread is under tension; operating the thread joining device to join the second thread end to the thread already joined to the first thread end; a thread joining device or devices and a thread guide; This is accomplished by a thread repair method characterized by: resetting the mechanism so that a new repair cycle can be performed again;

If the first thread gripped is the thread connected to the fabric, a restart of the loom can be performed during the repair cycle.

Since the thread from the separate thread supply device remains in the thread guide mechanism during the period when said thread guide mechanism is moving, the number of threading and positioning operations that have to be performed during the repair cycle is minimized. maintained. This has the advantage that repairs can be carried out in a minimum amount of time.

The thread guide mechanism may be mounted to the side of the thread splicing device and may comprise one or more thread guiding holes, preferably moving in unison. However, the thread guide mechanism can also be constituted by a thread guide body forming part of the thread joining device.

The separate yarn feeding device mentioned above may be of any type. It can, for example, consist of a spool from which the required length of thread is drawn off each time. In a variant, instead of a spool, a loose length of thread of the required length can be used for repair.

[Example] In order to provide a detailed explanation of the present invention, the method according to the present invention will be described below by way of example in a step-by-step manner with reference to the accompanying drawings, but the present invention is not limited thereto. isn't it.

FIG. 1 shows the components that are of in-shell technology: a warp beam 1, a backrest roller 2, several rows of dropWires.
) 4 warp stop mots
ion) 3, shed 5, harness (har
1 is a schematic diagram of a loom having reeds 6, reeds 7, cloth beams 8, warp threads 9 and woven cloth 10; FIG. For clarity, the diagram shows warp spools 1
Only the warp threads 9A to be repaired between the warp thread stop device 3 and the warp thread stop device 3 are shown.

FIG. 1 shows the first and second mechanisms 11 and 12.
are respectively shown, the purpose of which is to position the yarn ends 14 and 15 formed by yarn cutting, to grip both yarn ends, and/or to connect both yarn ends to other warp yarns 9. It consists in separating from The mechanism itself is known.

The first mechanism 11 is, for example, as described in Belgian patent application No. 8700254 filed by the present applicant.
A suction nozzle (s
16, for example.

The mechanism 12 is such that when an adhesive substance, for example an adhesive tape 18, is pressed by the lever mechanism 17 against the warp yarn 9 at a location where the broken warp yarn 9A is located, and the adhesive substance is withdrawn, the corresponding loose yarn 9A can be configured, for example, by a mechanism attached to the adhesive tape 18, as shown in FIG.

Further, as shown in FIG. 1, according to the present invention, the movable device 1
9 is a tying-in device as known, for example, from German Patent No. 599.681.
ce) is used for binding threads.

The method according to the invention essentially consists of various steps illustrated sequentially in FIGS. 1-5.

If a warp yarn break 13 occurs, it is detected by a warp yarn stop device. Belgian patent application No. 87 filed by the applicant
The mechanism described in No. 00983 is used to determine whether a thread break 13 has occurred between the warp thread winder 1 and the warp thread stop device 3. In that case, the mechanisms 11 and 12 for positioning, separating and/or gripping the thread ends 14 and 15 are activated, so that the situation shown in FIG. 1 is reached. It should be noted that the thread knotting device 19 is threaded with a separate thread supply device 21, for example a thread 20 taken from a spool.

The positioning of the thread ends 14 and 15 is preferably carried out in close proximity to the warp thread stopping device 3 and the warp thread windings, respectively.

Once both yarn ends 14 and 15 are positioned, the yarn joining device is moved to one of the yarn ends, for example the first yarn end 14. As schematically shown in FIG. 2, the thread end 14 is
It is gripped by the suction nozzle 16 and introduced with known devices, for example hooks and/or clamps 22, into the thread joining device 19, through which the thread is threaded straight. next,
The thread joining device 19 operates, and the thread 20 is joined to the thread end 4 by a knot or the like, as shown in the third section.

In the next step, as shown schematically in FIG. 3, the yarn joining device 19 is moved to the mechanism 12 which has separated the second yarn end 15 from the warp sheet. During this movement, indicated by the arrow P, the thread 20 from the thread supply device 21 slides through the thread joining device 19 and, in the invention of the type described at the beginning of the Detailed Description section, the thread It is important that the thread 20 is passed through the thread guide mechanism 24, which is a thread guide of the main body of the joining device 19.

The second yarn end 15 is then pulled away from the adhesive tape 18 and attached to the yarn joining device 19 by means of the hook and/or clamp 22 or other device, as also shown in FIG. be introduced. The thread joining device 19 is then in a position to join said thread 20 to the second thread end 15.

In order that after the repair, the corresponding warp thread 9A has the same length as the other warp threads 9, the thread joining device 19 is located on the warp sheet, as shown in FIG. , a tensile force is applied to the yarn end 15 and the yarn 20. The tension on the thread end 15 can be supplied, for example, by a hook or clamping device 22 as described above; - the tension on the tip 20 can be supplied, for example, by a third
As shown in the drawings and FIG. 4, this is achieved by a movable clamp 25 etc. mounted on the mechanism 12.

Once the knot or other knot 26 between the yarn end 15 and the aforementioned yarn 20 has been made, the yarn feeding device 21 is released and
The thread joining device 19 can be returned to the rest position as shown in FIG. The cutting of the thread 20 and the separation of the free end of the thread end 15 can normally be carried out in the thread joining device itself, as is known.

It is clear that once the knots or knots 23 and 26 have been made, the remaining thread ends are cut off and removed, for example by a suction nozzle 27, as shown in FIGS. 2 and 4.

When the thread joining device 19 moves in the direction of the mechanism 12,
It is also clear that at any time only the second thread 15 is arranged.

By using the method according to the invention, the yarn end 14 and the yarn 20 can be moved while the yarn joining device 19 described above is moved.
The tensioned state is reached so that the mechanism can be restarted as soon as the knot or knot 23 is made and the thread end 14 and thread 20 are in the tensioned state. This means that
Once the knot 23 is done, the machine can restart automatically,
This means that the signal from the warp stop device can then be used as a starting signal. When a warp thread is pulled, the corresponding drop wire is lifted and breaks contact (continuity) with the corresponding electrode.

As shown in FIGS. 6 to 10, the above thread guide mechanism 2
4 can also be constituted by clamps 28 and 29, etc., which are mounted on the side of the thread joining device 19 and can be presented together with the thread joining device 19, for example, by means of a common fixture 30 or the like.

To this end, the clamps 28 and 29 are moved by a suitable drive 33 into three positions, as a result of the relative movement of the jaws 31 and 32: in position A, in which the clamps are open; Position B1 where
The configuration shown in FIG. 7 is taken so that the clamp is in the closed position C.

The operating sequence in this case can be inferred from FIGS. 6, 8, 9, and 10. The position shown in FIG. 6 corresponds to the position shown in FIG. Yarn 2 from separate yarn feeding device 21
It is important to note that at point 0, the thread guide mechanism 24 is already in the standby position. In the position shown in FIG. 8, the thread joining device 19 is presented to the two tensioned thread ends 20 and 9A to form a knot 23. During this time, the suction nozzle is, for example, lifted somewhat, keeping the yarn end 14 in tension.

During the movement P of the fixture 30, the thread 20 is moved by the thread guide mechanism 24.
, or at least one clamp, namely clamp 28
remains. At this point, it is clear that the clamp 28 is in the position B described above, as shown in FIG.

During the movement of the fixture 30, the clamp 29, now fully open (FIG. 7, position A), returns to the thread 20. At the end of the thread P, clamps 28 and 29 are closed (FIG. 7, position C), gripping the thread 20 and subsequently pulling it. The second yarn end 15 is simultaneously pulled loose from the adhesive tape 18, for example by a clamp 34 of the same type as shown in FIG.
The sheet is in a stretched state. Next, thread 20
After the threads 20 and the second thread end 15 have been substantially pulled and brought to the (sheet) side of the warp system 9, said threads 20 and the second thread end 15 are knotted, such as by a knot 26. Finally, after the thread clip 29 has again been pinched (position A) and the fixture 30 has rotated 180° in relation to the thread 20, the clamp 29 has again actuated the thread 20, as shown in particular in FIG. let This results in the position shown in FIG. 6, with the clamp 28
The position of & and 29 changes.

It is also clear that the above-described mechanisms 11 and 12 for positioning, separating and gripping the thread ends 14 and 15 can be constructed with a different mechanism than that shown in the accompanying drawings.

The thread feeding device 21 is shown in all figures as a spool, but other f! ! It is clear that similar thread feeding devices can also be used.

As already mentioned at the beginning of the detailed description of the invention, the thread supply device 21 can also be constructed with loose threads, each of which is of sufficient length to carry out the above-mentioned repairs.

It should be noted that according to the invention it is also possible to create the knot 26 first and then the knot 23. in this case,
The 6th movement P of the thread guide mechanism is in the opposite direction to the direction shown in the figure.

The present invention is not limited to the embodiments illustrated and described, but the method for repairing broken warp threads on a loom includes:
Within the scope of the invention, various modifications can be made.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a loom in which warp thread breakage occurred. 2 to 5 show successive steps of the method according to the invention. FIGS. 6-11 show modified embodiments of the embodiment shown in FIGS. 2-5. 1... Warp thread winder 2... Backrest roller 3... Warp thread stopping device 4... Drop wire 5... Shed 6... Harness 7... Lead 8... Cross winding
9... Warp yarn 10... Woven fabric 11, 12
...Mechanism 13...Warp yarn breakage 14,15...
- Yarn end 16.27... Suction nozzle, 17... Lever mechanism 18... Adhesive tape 19
... Movable device 20 ... Thread 21 ... Yarn supply device 22 ... Hook and/or clamp 23 ... Knot or knot 24 ... Thread guide mechanism 25
... movable clamp 26 ... knot or other knot 28.29 ... clamp 30 ... common fitting 31.32 ... jaw 33 ... drive device 34
... Clamp and 3 others Z

Claims (1)

[Claims] 1. A method for repairing broken warp threads of a loom, particularly a method for repairing warp threads between a warp thread winder and a warp stop device, which includes the following steps:
, 15); taking the grasped first thread end (14) and separating it with a separate thread guide mechanism (24) and a thread knotting device (19); presenting the first yarn end (14) from a separate yarn supply device (21) by operating the yarn knotting device (19); thread (20
): connecting the yarn guiding mechanism (24) to the second yarn end such that the yarn (20) from the separate yarn feeding device (21) remains at least in the yarn guiding mechanism (24); Part (15
) is located; taking the gripped second thread (15) and moving it to the location where the second thread (15) is located;
) and a thread knotting device (19); operating said thread knotting device (19) so that it is in tension while the threads are being joined to each other; and joining the second yarn end (15) to the yarn (20) already joined to the first yarn end (14); yarn joining device and joining devices (18); ); and resetting the thread guide mechanism so that a new repair cycle can be performed again. 2. Method according to claim 1, characterized in that the yarn end (14) to be joined is formed by a yarn end connected to the fabric (10). 3 Yarn guide mechanism (24) to the second yarn end (15)
and/or during the movement of the yarn joining device (19), on the one hand said yarn guiding mechanism (24) and/or said yarn joining device (19)
) on the other hand and the warp stop device (3) on the other hand, the threads (20, 14) are in a tensioned state. 4. The same yarn joining device (19) consisting of a knotting device has a separate yarn feeding device (21 )
4. A method according to claim 1, characterized in that the yarn (20) from the yarn is used to join the corresponding yarn ends (14, 20). 5 The clamps (28, 29) are used as thread guiding mechanism (24), and during the movement of the thread guiding mechanism (24), at least one clamp (28), in particular the clamp through which the thread passes, 4. Any one of claims 1 to 3, characterized in that, depending on the position of the jaws (31, 32), the clamp also forms a thread-guiding hole, such that it is held in the hole-forming position (B). The method described in. 6. Claims 1 to 5 characterized in that the positioning, separation and/or gripping of the broken thread ends (14, 15) is carried out at the warp thread stopping device and in close proximity to the warp thread winding (1). The method described in any one of .