JPH0253930A - Method for forming yarn crossing in warping machine and separation part - Google Patents

Abstract

PURPOSE: To simplify crossing formation and to reduce the working time necessary for a crossing formation stage by making plural separating parts easily connectable to the corresponding to separating parts of a preceding band. CONSTITUTION: A shed is formed after a first taking up on the yarn of a first warping band 3 on a warping drum 5 and the separating parts 1 formed with front portions as a flat rod are inserted therein to prevent the fall of the upper yarn by the transverse facing teeth in the rear portion of the separating parts 1. After the warping band 3a is completely taken up, the same stage is iterated by another separating parts. As to the second warping band 3b and all of the subsequent warping bands, the separating parts 1b... having the insertion type and engagement type front portions are inserted into the flared sheds 2 of the yarn 4 and are connected to the already rolled in separating parts 1, etc.

Description

Description: TECHNICAL FIELD The invention relates to a method, in particular for the formation of yarn crossings in a warping machine, as defined in the preamble of claim 1.

The invention also relates to means for implementing this method.

A warping machine, such as a drum-type warping machine, which prepares warp beams for weaving (spools around which warp threads are wound), cuts the windings of the threads so that individual warp threads can be identified after warping. It is known that a targeted yarn separation (yarn sectioning) must be carried out on the drum at the beginning and/or at the end and possibly also in the middle.

This separation, consisting essentially of the separation of the individual threads, ie of the even-numbered threads and the odd-numbered threads, is carried out by mutual spreading of the threads and insertion of a separating part, also referred to as an insertion operation. In this case, for example, a cross reed or other element provided with suitable teeth is, for example, first moved upwards and then penetrated into the opening made by the expanded thread thus formed. the separation string is inserted. Subsequently, the sideways are moved downwards and the second
A separation string is inserted.

In general, the winding of the yarn on the warping drum is carried out while the warp yarns required in the loom are separated into a number of homogeneous or non-uniform bands, in which case the first band or first section is usually conical. wrapped around the drum end area. The second band is wound in direct succession next to it, and then the last band is wound in the same way, but in this case the band does not necessarily reach the other end of the drum after all the warp bands have been wound. There's no need to be there. Correspondingly, reading or thread separation must be carried out at the beginning and/or end of each warping band and in the middle thereof.

The two transverse cords used today for manual reading are fixed with their free ends to elastic rings wrapped around the drum at the beginning of the first warping zone present in the structure. and the ring is located at the head end of the drum opposite the first band. At the start of the second warping band and all subsequent warping bands, the portion of the transverse string remaining outside the last wrapped warping band is wrapped around the existing warping band in the structure. The expanded thread is inserted into the corresponding opening and the free end is likewise fixed in the aforementioned elastic ring. Two tufts of transverse cords are fixed at the end of each warping zone to the existing zone directly alongside it.

Manual thread cross-forming, as traditionally practiced, presents several significant drawbacks attributable to the characteristics of the wefts used. The first disadvantage is that each ridge cord is untied each time it is wound before the cord is passed through the corresponding opening in the band present in the structure. The tuft of the transverse cord must then be drawn into the so-called shed, since this is always longer than the width of the shaping band. Each ridge cord must then be tensioned and its free end re-secured. Other disadvantages are the time and labor costs this manual process requires;
This has a negative effect on production costs. Finally, a further disadvantage is that it is difficult to mechanize or automate the cross-forming process using means that are compatible with existing warping machine types.

SUMMARY OF THE INVENTION It is therefore an object of the invention to eliminate the above-mentioned drawbacks and to provide a method and means for carrying out the method, in particular replacing the traditional cross-strings to facilitate and streamline this process. This is the subject of the present invention. The working time required for the cross-forming process should be reduced and furthermore the possibility of automating this process should be provided.

This problem is solved according to the invention by a method with the features of patent claim 1. The proposed solution is such that at the beginning and/or end of each warping zone and possibly in the middle, two or more separating parts can be connected by simple movements with the corresponding separating parts of the preceding band. It allows for simplification and rationalization of the cross-forming, in which case the component is suitable for warping bands of various widths. This results in the mechanization of the entire operation, since the separated parts do not have a detrimental effect on the winding process, and the parts chained together can be easily and simultaneously extracted from one end. It becomes possible. After use, the interconnected separation parts can be disassembled again so that they can be used to form a new yarn cross.

Each separate part can be composed of one type of unit or multiple types of identical or different units which are connected to each other during insertion or after insertion. The division of the separating part into a plurality of individual parts has the advantage that the separating part can be adapted to the warping band width.

The insertion of the separation part takes place in particular by feeding it into the expanded yarn shed parallel to the winding axis of the warper and/or perpendicular to the yarn and parallel to the plane.

However, as an alternative, the separation part can also be inserted into the shed by a horizontal rotational movement about a vertical axis. It is therefore natural that, for example, in an automated process, the insertion could be carried out by means of a swinging arm with a rotating movement.

The precise positioning of the warping band adjacent to the separating part to be inserted in the shed with respect to the already inserted separating part is carried out in particular by a movement in the yarn direction, in which case the separating part is parallel to the winding axis of the yarn. is maintained.

In this way, tilting of the separate parts is prevented when they approach each other or are joined together.

Insertion of the separating part into the shed is in principle carried out by fixing one end manually or mechanically, for example with pliers. However, it would of course also be conceivable to introduce the separation part over its entire length into the shed, for example through a guide pipe.

The connection of the separate parts of adjacent warping zones takes place by a particularly simple displacement into one another. This connection is particularly removable, so that the connected separation parts can be disassembled individually again. The separation parts are moved into each other in such a way that the parts protruding from each separation part have a length corresponding to the width of the warping strips present in the winding arrangement. It is therefore clear that the respective utilization width of the separation part can be determined by the insertion depth. It is therefore natural that a particular type of separation part can be adapted to multiple swath widths. The actual mechanical connection of the separating parts can be effected by an actual hook engagement or also by only a loose engagement, such as for example by a friction fit. For example, a front side magnetic connection of the individual separating parts could also be considered.

The method described above can be carried out particularly advantageously using a separating part having the features according to claim 10. Separate parts formed in this way are easy to handle and simple to manufacture.

The front part of the separation part can be formed flat and relatively flexible. This separating part is used to separate the first warping strip which rests on the cone of the warping drum, the flat part resting on the cone.

Interconnection of the separate parts is simply possible because the front part is provided with a row of longitudinally arranged pawl teeth. This pawl is engageable into the rear part of the adjacent separating part, in which case the tooth divisions form an interlock that allows different penetration depths. Thus, for example, the rear part can be provided with pawls that can engage in the preparation teeth present in the front part of the adjacent separating element to be inserted. In this case, the connection takes place independently at the desired insertion depth, and any attempt to pull out the connected separation part here is prevented from breaking the connection.

However, it is also possible to connect the individual separate parts in ways other than using pawls and pawls. It is therefore possible for the front part to have a side wall and for the side wall to be provided with at least one fastening element, the fastening element being engageable into a mating element in the rear part of the adjacent separating part. In this case, for example, a forwardly projecting fastening element or a rearwardly restraining fastening element, such as a spring-like vane projecting from the side wall and engaging in an opening in an adjacent separating part, can be an example.

In particular, at the end of the rear part, at least one transverse tooth is provided, in which a thread which tends to slip off on the free side of the warping zone present in the winding arrangement can be restrained.

The separating part can be manufactured particularly easily if it is manufactured in one piece as a plastics material molding. It may also be a metal molding.

Other features and advantages of the invention are apparent from the following description of an embodiment and from the drawings.

Embodiment As can be seen from FIGS. 4 and 9, the separating part 1 consists of an elongated straight body and preferably consists of a plastic molded part, and furthermore, the separating part 1 has a front part 1 in the longitudinal direction.
0 and a rear portion 11. Both sections are of substantially the same length.

The rear part 11 of the separation part 1 is box-shaped, substantially shaped like a single character, and open at the top. An opening 19 is provided in the end 18 through which a subsequent separation part can be inserted into the rear part.

The end 18 is also provided with an oscillating pawl 14 which is bias-loaded in the direction of the bottom 9 of the separating part. This pawl is connected as an integral part with the rest of the body. However, in this case, it is natural that it may be used as a separate component.

A plurality of pawls 15 are provided on the front part 10 of the separation part, the pawls 15 being serrated, directed upwards and arranged between the side walls 16 . The rear portion 11 is a tapered portion 7
It moves to the front part 10 via the . As can be seen in particular from FIGS. 8 and 9, the side walls 16 are lower and the bottom 9 is narrower in the front part than in the rear part. The outer cross-section of the front part 10 is dimensioned in such a way that it is slightly smaller than the inner cross-section of the rear part 11, so that the separating parts can be inserted into each other, in which case separating rods with identical cross-sections can be inserted into each other. material is constructed.

Furthermore, it is preferred that the front part 10 is provided with a pointed end 8, which facilitates insertion. The insertion process is described in FIGS. 10 and 10-, where according to FIG. 10 the pawl pawl 14 is pushed upwards and the pawl 1
Slide on 5. The pawl pawl 14 meshes between the two pawl teeth at the desired position, thereby preventing the inserted separation part from being pulled out in the opposite direction. It is possible to insert the separating parts into each other up to the stone hole 12, in which case only the rear parts 11 directly connected to each other are still visible.

At the end 18 of the rear part 11 smaller transverse teeth 17 are provided on the upper side. This is because, as will become clearer from the following description, the single wrap prevents the threads from sliding sideways on the free side of the warping zone within the structure.

Intersection of the threads of the first warping zone at the conical end of the warping drum (
The first part is the separated part used to form the cradling.
1 to 15. The rear part 11 is constructed substantially identically to the separation part for the trailing band described above. However, the front part 10 is longer and has the shape of a flexible flat bar 16. This flat bar rests against the cone of the warping drum and forms an angle with the rear section 11, as can be seen in FIG.

The method of using the separated parts will be explained below with reference to FIGS. 1 to 6. Here, it is assumed that the means for expanding the yarn or the means for forming the shed (weft thread insertion opening) are known to those skilled in the art. The first yarn 4 of the first warping belt 3a is transferred to the warping drum 5.
After winding up, a shed 2 is formed in which the even-numbered threads and the odd-numbered threads are spread out in a known manner in such a way that they are pulled apart from each other. Into the shed formed in this way is a first part whose front part is formed as a flat rod.
The separating part 1 is inserted and the flat rod rests against the conical part 6 of the warping drum. The end 18 of the rear section can then extend slightly beyond the warp band or be exactly flush with its outermost thread.

At this time, the above-mentioned horizontal teeth 17 prevent the upper yarn on the outer side of the warping drum from slipping onto the warping drum 5. Subsequently, the spreading of the threads is alternated in a known manner in order to insert another separating part 1 into the opening formed by the new spreading in order to complete the crossing of the threads. This step is not shown. Instead of the usual crossing using two separating parts, it is also possible to form a six-fold crossing using six separating parts arranged one after the other in the band direction. Subsequently, the warping drum 5 is further rotated,
As a result, the two separate parts for the thread crossing are surrounded by the thread. After the first warping band 3a has been completely wound up, the same process is repeated with the separating part 1a at the end of the warping band, so that the first separating part approximately as shown in FIG. placement is obtained.

For the second warping band and all subsequent warping bands, a separate part with an insertable or engaging front part 10 is used. As is clear from FIG. 2, the threads 4 of the second warp band 3b are firstly and again spread out, thereby forming the shed 2.

The second separating part 1b is then inserted into the shed 2 parallel to the warping drum 5 and connected to the already wound separating part 1. The part of the second separating part 1b that projects from the first separating part 1 has an actual utilization width which in this case corresponds approximately to the width of the warping band.

As is clear from FIG. 6, at the end of the second warping zone, exactly the same process as the beginning is carried out again using the separating part 1c. Depending on the application, it is of course also conceivable for other thread crossings to be formed between the beginning and the end of the warping band.

In this way, as many separate parts as there are warp bands in the yarn group are interconnected linearly in a row.

In order to pull out the mutually connected separated parts from the warping group after winding, the separated parts can be pulled out laterally from the warping group in the opposite direction to the joining direction or in the opposite direction to the restraining force of the pawl 14. .

Since the outer surface of the part is finished smooth, the warp threads will not be damaged. To disassemble the separate parts,
It is sufficient to lift the pawl 14 slightly, after which the front part 10 can be pulled out of the opening 19. When withdrawing the interconnected separating parts, it would also be conceivable to use the last separating part to insert the other separating parts, regardless of whether it is on a warping drum or in the rolled-up state.

This is the case, for example, with transverse strings, continuous flat bands, etc.

In practice, the details of the method and of the separating parts used will vary widely in all cases, in particular with respect to the shape and dimensions of the separating parts, their arrangement or the materials used, but the basic idea of the invention remains in this case as well. do not have.

[Brief explanation of the drawing]

FIG. 1 is a schematic partial sectional view of a first warping band with a separating element according to the invention; FIG. Schematic diagram FIG. 6 is a schematic diagram of the formation of thread crossings at the ends of the warping zone according to FIG. 4 is a plan view of a subsequent borrowed separation part according to the invention; FIG. 5 is a sectional view taken along plane E--E of FIG. 4;
FIG. Figure 7 is a sectional view taken along plane B-B in Figure 5;
Cross-sectional view taken along plane C-C in the figure: Figure 9 is plane D-D in Figure 5.
Figures 10 and 10a are partial views of the two separated parts when inserted into each other; Figure 11 is a plan view of the separated parts of the first warping process; Figure 12
The figure is a cross-sectional view taken along plane B--B in FIG. 11, and FIG. 16 is a cross-sectional view taken along plane A-A in FIG. 12. 1...Separated part-1a...First separated part, Ib,
1c... Other separation parts, 2... Shelter, 6/2.
...First warping zone-3b... Adjacent warping zone, 7... Tapered part, 10... Front part, 11... Back part, 1
4... Pawl pawl - 15... Pawl tooth, 16... Side wall, 17... Sideways tooth, 18... End part -19...
Opening. (4 people)

Claims (1)

[Claims] 1. Formation of yarn crossings, especially in warping machines, where the yarns (4) of warping bands (3a, 3b) are spread out for shed formation and for insertion of separation parts In the method for: a first separation in the shed (2) of the first warping band (3a) whose utilized length approximately corresponds to the width of the first warping band (3a); the part (1a) is inserted; the winding process continues; the first separating part (1a) is inserted into the other separating part (1b) arranged in the adjacent warping zone (3b); In particular, the method of intersecting threads in warping machines is characterized by being connected in the longitudinal direction; and that such a number of separate parts are sometimes assembled in one row as long as mutually adjacent warping bands are present; Method for formation. 2. Method according to claim 1, characterized in that each separate part consists of one type of unit or several types of identical or different units, which are connected to each other during or after insertion. 3. Method according to claim 1, characterized in that the separating parts are inserted in the shed by being fed parallel to the winding axis of the warper and/or perpendicular to the threads and parallel to the plane. 4. Method according to claim 1, characterized in that the separating part is inserted in the shed by a horizontal rotational movement about a vertical axis. 5. The warping band adjacent to the separating part to be inserted in the shed is positioned relative to the already inserted separating part by moving in the thread direction, in which case the separating part is parallel to the winding axis of the thread. 4. A method according to claims 1 and 3, characterized in that: 6. Method according to claim 5 or 4, characterized in that the insertion of the separation part into the shed is carried out by manual or mechanical fixation at one end. 7. Method according to claim 1, characterized in that the connection of the separating parts of adjacent warping zones takes place by movement into one another, in which case the connection is preferably removable. 8. The separating parts are moved into each other such that the parts protruding from each separating part have a length corresponding to the width of the warping strip in the winding arrangement.
Method described. 9. Method according to claim 1, characterized in that the connection of the separation parts is carried out by hook engagement, by loose coupling or also by opposite front magnetic abutment. 10, in particular in a separate part for the formation of thread crossings for carrying out the method according to claim 1: it is an elongated body which is longitudinally divided into a front part and a rear part (10, 11); , in which case the rear part (11) has at least one opening (19) on its front side and the rear part (11) is arranged such that the front part (10) of the adjacent separating part can be inserted through the opening (19). (11) A separation part for forming a thread intersection, characterized in that the cross section is formed. 11. The separating part according to claim 10, characterized in that the front part is formed flat. 12. Separation part according to claim 10, characterized in that the front part (10) is provided with at least one row of longitudinally arranged pawl teeth (15). 16, the front portion (10) comprises a side wall (16);
11. Separation part according to claim 10, characterized in that 16) is provided with at least one fastening element, which fastening element is engageable into a mating element in the rear part of an adjacent separation part. 14. The rear part (11) is provided with a pawl (14), which can engage in a prepared tooth present in the front part (10) of the adjacent separation part to be inserted. The separation component according to claim 10 or 12, characterized in that: 15. The separation component according to claim 10, wherein the relative insertion depth with respect to the adjacent separation component is variable. 16, at least one at the end (18) of the rear part (11)
Separating part according to claim 10, characterized in that two transverse teeth (17) are provided. 17. Separate part according to any of claims 10 to 16, characterized in that it is formed in one piece as a molded part. 18. It has a substantially ■-shaped cross section;
and the outer shape of the front part (10) is reduced relative to the rear part (11) so that the front part (10) can be inserted into the rear part (11) without any gaps in the adjacent separated parts. The separation component according to claim 10, characterized in that: