JPS6328951A - Method and apparatus for facilitating repairing of warp yarn of loom equipped with warp yarn detection piece - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a loom having a small number of warp detection pieces,
The present invention relates to a method for facilitating repair of warp threads and a device used for that purpose.

[Prior Art] It is already known that the warp detection piece described above is used in a conventional warp detection system. In this case, each warp thread is passed through a warp detection piece, and if a warp thread breaks, the corresponding warp detection piece falls, and this event is detected by an appropriate method and the m machine is stopped. Installed as follows.

Taking into account the high density of the warp yarns, that is, 40 to 60 yarns per 1 cl11, it is quite obvious that an extremely tight and dense warp detection piece assembly is produced. In this way, the warp detection pieces are always attached in several rows, and the warp detection pieces in the same row can come into contact with a common electrode when they fall. Since this warp detection piece assembly is extremely dense, it is obvious that it is extremely difficult to locate and repair the broken thread. Improvements aimed at significantly facilitating their repair are already known, as described in Dutch Patent Application No. 3,600,372 of the applicant.

This patent application describes a method for grasping a fallen warp detection piece with a gripper and presenting it above an assembly of warp detection pieces so that a weaving operator can easily carry out repairs. In order to have direct access to the warp detection strip in question, adjacent warp detection strips are laterally pushed apart from each other by a pivotable arm.

[Problem to be Solved by the Invention] This type of device allows for a significant improvement over known warp detection systems, but it is difficult to carry out automatic threading due to the position of the warp detection strips presented. The problem is that it is difficult.

Measures to solve problem C] The above problems are solved by the present invention described below.

The invention is particularly suitable for automatic warp detection strip rethreading. However, this does not exclude that it is also suitable for facilitating manual repairs.

The method according to the present invention mainly consists of detecting a fallen warp detection piece, grasping the fallen warp detection piece, and turning at least one end of the warp detection piece by a predetermined angle. The turning of the warp detection piece has the following advantages that can be used simultaneously or cannot be used simultaneously.

The main advantage of the invention is that the pivoting of the warp detection piece is immediately and clearly visible to the loom operator when a yarn break occurs.

Adjacent warp detection pieces are locally pushed apart from each other, thereby improving the operator's access to the warp detection piece in question, such as by reaching out, and possible auxiliary elements further push adjacent warp detection pieces away from each other. Another advantage is that the warp detection strips can be introduced between the warp detection strip assemblies for this purpose.

The following advantage is that, by turning, a gap is created between the warp detection piece and the thread in the same plane located perpendicularly or almost perpendicularly to the direction of the warp, which makes threading easier. Threading can be carried out more easily using automated equipment. It is quite obvious that it also facilitates the removal of broken warp threads.

[Examples] In order to better understand the opening color of the present invention, a few preferred embodiments will be described below as examples with reference to the accompanying drawings, but the present invention is not limited thereto. isn't it.

As shown in the side view of FIG. 1, the warp detector 1 mainly consists of a large number of warp detection pieces 2, each of which is provided in three to five rows, as is already known. It is suspended from warp thread 7.

A common guide element is provided for each row of warp detection strips 2, generally made of electrodes 8. There is a support shaft 9 below the warp 7.
Support elements such as can also be attached. Warp 7
If one of the pieces breaks, the corresponding warp detection piece 2 will fall and contact will occur on the electrode 8. The fallen warp detection piece will be indicated by symbol 2A below. This warp thread detection piece can later be located in accordance with well-known methods, for example by means of a mobile detection device mounted below the piece, as already described in Dutch Patent Application No. 8600372 of the applicant.

The method according to the invention can be used to facilitate the repair of broken threads. For this purpose, the fallen warp detection piece 2A is caught below, for example by a clamping device 10, as shown in FIG. Thereafter, the tightening device 10 and also the lower end 11 of the warp detection piece 2A are pivoted through a predetermined angle equal to 90', for example as shown in FIG. In this way, an opening 12 of a predetermined width is provided at the position of the adjacent warp detection piece 2A (FIG. 3), which provides the advantage that the fallen warp detection piece 2A can be easily reached.

The auxiliary elements 13'BL and 14 are then preferably introduced into the aperture 12, but this is not always necessary. After introduction into the aperture 12, the auxiliary elements 13 and 14 move away from each other, as shown in FIGS. 3 and 4, respectively. Therefore, the warp detection piece 2A in which the warp 7 passing through the adjacent warp detection pieces 2 and these warp detection pieces further falls
The opening 12 becomes even larger. These auxiliary elements 13 and I4 can of course be of any number and type.

According to the embodiment shown in FIGS. 3 and 4, these auxiliary elements consist of forks 15 and 16, which are arranged in the correct position above the support element. In other words, cylinders 17 and 18 and 8 (not shown) are located within the opening 12.
The forks 15 and 16 are positioned by the locking device.

To achieve the above effect, after the forks 15 and 16 are placed in the opening 12, the forks move away from each other.

Subsequently, the fallen warp detection piece 2AT is lifted up by the tightening device 10 as shown by the dashed line in FIG. Since the fallen warp detection piece 2A is rotated by about 90 degrees with respect to its normal posture at the height of the thread opening 6,
Threading can be performed manually or automatically with relative ease.

The reason for this is that this threading is done in the direction 1 parallel to the direction of the warp threads 7.
9. During the upward operation, the corresponding warp detection piece 2A desirably
When the warp detecting piece 2A is rotated back to its normal position, excessive friction may occur between the rotated warp detection piece 2A and the corresponding electrode 8, and the tightening device may be subject to an unnecessarily large load and/or be damaged. avoid possible occurrences. In this embodiment, before threading is carried out, the clamping device 10 returns it to its pivoted position in its highest position.

Since the possible threading element has to move above the support element 9 and through the thread opening 6 during rethreading, the corresponding warp thread detection piece 2A reaches its highest position and normally moves the warp thread 7.
shall be placed higher than when suspended in the This situation is shown by the symbol H in FIG.

In a further embodiment of the method described above, the pivoting is performed only in the highest position on the warp detection strips 2, and thus not in order to push adjacent warp detection strips 2 apart from each other, but primarily to facilitate rethreading. , will be implemented. The warp detection pieces can be pushed apart from each other in practice in other ways. Figures 5 and 6
As shown in the figure, it is, for example, a wedge-shaped base 20.
This can also be achieved by using a tightening device 10 with 21 and 21.

In the above embodiment, the warp detection piece 2A is always twisted with respect to the turning angle, but this is not always the case.

As shown in FIG. 7, when the warp detection pieces 2 and 2A are mounted on the guide element or electrode 8 with a sufficient gap between them, these elements do not necessarily cause the warp detection piece 2A that falls to be twisted. Automatic fishing can already be swiveled over a sufficiently large angle without the need. The latter element is the eighth
It is shown in the figure. Very clearly fallen warp detection piece 2
A rotates throughout its entire length.

The resulting advantage is that the warp detection piece can be gripped, for example, at one end thereof to perform an ia-upward swivel. On the other hand, at the other end of the warp detection piece, the advantage of the invention is that rethreading can be carried out below the electrodes.

It is quite clear that the fixing, pivoting and rethreading can take place at the upper or lower end of the warp detection piece 2 according to various different embodiments, and the method chosen depends on the type of warp detection piece used. It is.

The angle at which the warp detection piece 2A is swiveled, in particular at the height of the thread opening 6, does not necessarily have to be 911", but rather depends on the direction of rethreading and on the size of the threading element used. Generally speaking, the gripped warp detection piece is pivoted or rotated in such a way that its vertical projection of the thread opening 6 onto a plane perpendicular to the rethreading direction is greater than or equal to the width of the threading element. The re-threading direction is in the direction 19 parallel to the warp direction, but it is not necessarily the same. is the diameter of the selected needle.

As far as FIGS. 3 to 8 are concerned, it should be noted that the warp detection pieces 2 are illustrated with a relatively large distance from each other for clarity. In reality, they are positioned almost in contact with each other.

9 and 10 schematically show an apparatus for carrying out the method of the invention. This device mainly consists of a rotary tightening table 22, on which a tightening device 10 with ferrules 20 and 21 is rotatably mounted.

The base 20 is moved by a lever 23, for example by a pneumatic cylinder 24.

The rotary tightening table 22 can be moved by means of a transmission 25, as shown for example in FIG.

The tightening device IO can be raised and lowered by a device such as a carriage 26 that moves vertically. On the other hand, the rotary tightening table 22 is mounted on a horizontal carriage 27 that can rotate in a direction perpendicular to the moving direction of a carriage 28 that is driven or slid below the warp detection piece assembly. On this cart 28, there is a warp detection piece 2 that has fallen.
Also included is a sensing element 29 for determining the position of the .

A carriage 28 of this type and a corresponding detection element 29 are well known from the applicant's Dutch Patent Application No. 8600372.

The operation of the device according to the invention can be clearly understood by looking at the accompanying drawings. It is quite obvious that the whole system can be automated and that when a fallen warp detection piece 2A is detected, the tightening device 10 is automatically placed under this warp detection piece.

However, the gripping of the warp detection piece 2 does not necessarily have to be carried out by the tightening device.

In other embodiments, this result can also be achieved, for example, by means of groove-shaped cutout elements provided around the circumference of the warp thread detection piece 2^. Meanwhile, a pivoting motion is then applied to this element.

It is quite obvious that the invention is also applicable if other types of warp detection pieces are used, for example when the threads are pulled up above the electrodes, if the device is appropriately designed.

The above description also includes the case where the cut warp thread 7A no longer remains in the fallen warp detection piece 2A. However, in most cases, the broken warp threads 7A, or at least a portion thereof, remain passed through the warp detection piece 2A, as particularly shown in FIG. 11. In such a case, the method according to the invention is preferably carried out in stages as shown in FIGS.
The direction of rotation is extremely important.

In the first stage shown in FIG. 12, the legs 30 of the fallen warp detection piece 2A are turned in the direction of the broken warp 7A passing through the warp detection piece. Warp detection piece 2A where the broken thread fell, adjacent warp 7 and warp detection piece 2
The broken thread runs in such a way that it does not get caught or caught between the

As a result, the two spatial regions A and B are sufficiently free of threads and also free of broken warp threads 78. Spatial area A
, B can be provided with the above-mentioned auxiliary elements 13 and 14, which may be made of forks, need not be solid and can engage with the support shaft 9 mentioned above. These spatial regions occur in a direction diagonal to the fallen warp detection piece.

As shown in FIG. 13, the auxiliary elements 13 and 14 move away from each other, so that, as described above, a large opening is created around the fallen warp detection piece 2.

As far as FIG. 13 is concerned, the position of the broken warp thread 7A is
It should be noted that the sides B31 and 32 of the pivoted warp detection piece 2A are clearly defined, so that the broken warp threads 7A can be captured in these positions by the capture means for further operation.

Finally, the warp detection piece can be swiveled back in the opposite swiveling direction as shown in FIG. 14. Therefore, the leg 30 rotates away from the broken warp thread 7A, and the broken thread becomes completely free and can be removed from the warp detection piece 2A without any problem. Therefore, this warp thread detection pressure piece 2A is in the position where it has already been re-threaded.

The invention is in no way limited to the embodiments described by way of example and shown in the attached figures, but the method for facilitating warp repair, these warp detection pieces and the devices used in this method are in accordance with the invention. Many alternative solutions can be implemented without leaving the framework.

[Brief explanation of drawings]

Figures 1 and 2 are explanatory diagrams of grasping and turning the warp detection piece;
FIG. 3 is a sectional view taken along the line III-II+ of FIG. 2;
FIG. 4 is a view similar to FIG. 3 in which an auxiliary element is introduced to further push adjacent warp detection pieces apart from each other, FIGS. 5 and 6 are explanatory views of another embodiment of the present invention, and FIG. 7 8 is an explanatory diagram of another embodiment according to the present invention, FIG. 9 is an explanatory diagram of an apparatus according to the present invention, FIG. 10 is a sectional view taken along the line XX in FIG. 11 to 14 are explanatory views of the rotation of the warp detection piece, and in this case, a portion of the broken warp still exists on the warp detection pressure piece that has fallen. 1...Warp detector 2...-Warp detection piece 2A...
・(Falled) warp detection pieces 3 to 5... Row of warp detection pieces 6... Yarn opening 7... Warp 7A... (broken) warp 8... Electrode 9... Support shaft 1
0... Tightening device 11... Lower end of warp detection piece 12...
・Opening (of warp threads) 13.14... Auxiliary elements 15.
15... Fork 17.18... Cylinder 19... Direction parallel to the warp direction 20.21... Mouthpiece 22... Rotary table 23... L/bar 24... Pressure gas cylinder 25
...Transmission device 26...Vertical carriage 27...
・Horizontal carriage 28... Carriage 29... Detection element 30... Leg 31. 32... Side edge

Claims (1)

[Claims] 1. Warp repair of a loom equipped with a warp detection piece, characterized in that a fallen warp detection piece (2A) is grasped, and at least one end of the fallen warp detection piece is turned at a predetermined angle. How to make it easier. 2 The fallen warp detection piece (2A) is rotated in the fallen state, and at that time, the adjacent warp detection pieces (2) are pushed apart from each other to create an opening (12), and then the fallen warp detection piece (2A) is rotated. 2A) is pushed upwards, and then the warp detection piece (2A) is threaded again in the above-mentioned pivoted state. 3 After turning the fallen warp detection piece (2A), the auxiliary element (
13, 14) are introduced into the aperture (12) provided in a pivot, and then adjacent warp detection pieces (2) are further pushed apart from each other. 4 The fallen warp detection piece (2A) is turned back to its normal position just before being pushed upward, and after being pushed upward, it is turned back to the turned position again before being threaded through the threads again. The method according to claim 3, characterized in that: 5. The method according to claim 1, wherein the fallen warp detection piece (2A) is pushed upward before being turned by a predetermined angle. 6. The method according to any one of claims 1 to 5, characterized in that the gripped portion of the fallen warp detection piece (2A) is rotated by about 90 degrees. 7. The warp detecting piece (2A) that has fallen and is grasped is such that the vertical projection of the thread opening (6) of this warp detecting piece (2A) onto a plane perpendicular to the re-threading direction is larger than the width of the threading element, or 7. A method as claimed in claim 1, characterized in that it is equally pivoted or twisted. 8 Warp detection piece (2A) where broken warp (7A) has fallen
If the warp thread detection piece (2A) is located within the warp thread (7A), the warp thread detection piece (2A) is initially pivoted in a direction such that its leg (30) is turned toward the broken warp thread (7A). The method described in section. 9 The auxiliary elements (13, 14) are connected to the rotated warp detection piece (
2A), the adjacent warp threads (7) are then attached to these auxiliary elements (13
, 14). 9. A method according to claim 8, characterized in that they are further pushed apart from each other by . 10 Following the mutual pushing apart of the adjacent warp threads (7), the fallen and gripped warp detection piece (2A) is rotated in the opposite direction, and the broken warp thread (7A) is completely freely attached to the warp detection piece. 10. A method as claimed in claim 9, characterized in that the method comprises the steps of: 11. A device used for carrying out a method for facilitating warp repair of a loom equipped with a warp detection piece, characterized in that it has a pivotable tightening device (10). 12. Device according to claim 11, characterized in that the pivotable tightening device (10) is provided for raising and lowering. 13. Claim 11, characterized in that the pivotable tightening device (10) is mounted on a carriage (28) or on a carriage, the latter being movable under the collection of warp detection strips (2). The device according to item 1 or item 12.