WO1986007102A1

WO1986007102A1 - Constructional arrangement and yarn magazine for a weaving loom with pneumatic introduction of the weft

Info

Publication number: WO1986007102A1
Application number: PCT/HU1986/000033
Authority: WO
Inventors: Miklós JEDERÁN; László MÁNDOKY; Péter RÁCZ
Original assignee: Budapesti Mu^"Szaki Egyetem
Priority date: 1985-05-24
Filing date: 1986-05-26
Publication date: 1986-12-04
Also published as: HU191794B

Abstract

Arrangement for a weaving loom with pneumatic introduction of the weft, comprising a four articulation drive mechanism of a weaving batten, a yarn magazine (20), at least one main nozzle (13) for introducing the wefts into an opening of the shed, as well as elements for guiding the airflow, particularly a series of air baffles (12). The arrangement is characterized in that the orientation elements of the airflow, particularly the series of air baffles (12) enabling the guiding of the yarns, the main nozzle (13) as well as the yarn magazine (20) are arranged on a same support (9, 9') which forms a medial link of the four articulation drive mechanism of the batten, mechanism with which it is formally connected by a coupling rod (3) and is movable therewith. The yarn magazine (20) has an inlet orifice (21) corresponding to an auxiliary nozzle (24) provided for the yarn insertion, a cover (22) parallel to a foot plate (36), as well as a retainer space which, in the yarn guiding direction, is delimited by a sidewall departing from a cross-section bisector symmetry plane, and presents in the yarn conveying direction a zone having a widening inner cross-section. The yarn magazine (20) must also be provided with an outlet orifice (23) enabling the extraction of the yarn and provided in the symmetry plane on the outer surface with respect to the inlet orifice (21). The retainer space has a zone with a cross-section which narrows into a portion contiguous to the enlarging cross-section, and it is provided with a sidewall having additional orifices (25) provided for the air supply.

Description

CONSTRUCTIONAL ARRANGEMENT AND THREAD STORAGE UNIT FOR WEAVING CHAIRS WITH PNEUMATIC INSERTION OF THE SHOT

The invention relates to a structural arrangement for looms with pneumatic insertion of the weft, which has a four-joint drive mechanism for a sley, a thread storage device, at least one main nozzle which introduces the weft into an opening of a shed, and elements for guiding air flow , in particular a series of co -fusors, the elements guiding the air flow. arranged on a vibrating Blattelemeπt, or are formed. The subject of the invention ^{• also} forms a ¹ thread storage unit, which is particularly useful in the proposed structural arrangement of looms and an input opening which is assigned to an auxiliary nozzle provided for thread insertion, a cover and a footplate parallel to it contains, furthermore, is formed with a storage space which is delimited in the direction of guiding the thread with a side wall distancing the plane of symmetry bisecting the cross-section and has an area with a widening internal cross-section in the direction of the weft thread transfer . It is known that the possibilities of ever cheaper use are a result of the development of technology loom been exhausted of protecting ^'. The looms working without shooters can always find more

Distribution. At the current state of the art, the looms provided with shooters are limited because of them Rotation speed and / or performance as well as the high workload of operation in the highly developed and in the other industrial countries practically unusable. The looms that are still working are constantly being replaced by machines without protection.

The perhaps most dynamic development has been shown in the ^' looms working with nozzles. This type of loom working without shooters is suitable for securing the width of the blade in the range from 155 to 165 cm and for ensuring that the weft thread is guided in an air duct to the opening of the shed, the air duct being passed through a Opening protruding row of confusors is secured by nozzles, and there are gaps of a few mm-π in the row of confusors. Such arrangements can be seen in the international publication of WIPO No. 80/00087, in US Pat. No. 4,371,007, and in British Laid-Open Publications 2,050,443 and 2,060,008.

An important common feature of the designs currently being developed is that, in order to ensure the undisturbed measurement of the thread length, the pull-off elements for pulling off the thread and / or the measuring drums and the nozzle, which generally lies in the line of the pull-off elements, on the machine body are arranged so that there is no coupling between them and the sley. The result of the constructional solution presented is that the shutter should be in a quasi-stationary idle state during the weft impact, since otherwise the nozzle and the air duct caused by the nozzle and the row of confusers cannot lie in a line. D _a in a complicated drive input mechanism of the batten is necessary, the Führuπgsglieder requires higher number of joints.

The known solutions are therefore complicated and labor-intensive, which is why the prices of one Looms fitted with a confuser are significantly higher than those of the classic looms.

A new stage of development is associated with the appearance of the profiled blades and the nozzle. In these arrangements, the air duct is one. It is opened in such a way that the other side is delimited by special teeth. As an example, the solutions shown in Swiss Patent Nos. 625 563 and 637 707 can be mentioned. With these constructions, the

Nozzles that arrange the weft into the main opening of the shed, as well as the staircase nozzles protruding into the shed opening on the sley. The Stafetendüseπ are, for example, according to the British disclosure s _. chrift No. 2 050 443, US Pat. No. 4,369,817 or according to DE-0S No. 31 22 139. The nozzle systems which can be moved together with the sley allow the use of simple structural designs which are similar in structure to the leaf construction of the classic looms. However, the known solutions are burdened with the disadvantage that the profiled sheet is extraordinarily expensive and that the step-by-step control of the nozzle systems requires more complex and ^' mechanical and / or electronic control elements.

Various thread withdrawal elements and thread storage units have been developed for the weft insertion systems implemented with air flow. A common feature of such constructions is that the weft is pulled off at a uniform speed and the weft is introduced into the shed opening not continuously but periodically. The thread drawn off during the pause of the weft stop is in the form of a U-shaped loop or along a helix on the jacket of a Rolled body of given dimensions stored. A nozzle connected to the machine body or movable together with the sheet serves to blow the weft into the shed opening. The specialist literature presents many different examples, on the basis of which it is possible to design the traditional looms provided with shooters in such a way that the shooter is no longer necessary. With these looms, however, the use of the air streams is not known, but rather for the weft attack. compliant or firm attack arm is used. It can be seen from the specialist literature that the conversion of the known looms for the arrangement of pneumatic units has not yet been proposed. The object of the present invention is to obtain, in the looms, the partial elements which are independent of the movement of the weft and to develop such a mechanism for moving the blade and such a storage unit for pneumatic operation, whereby a structural arrangement can be achieved, in which a series of an air stream leading and movable together with the sheet members for the introduction of the shot gun is rom provides in a Luftst ^'. Another objective is to develop a fadeπ storage unit and a trigger element synchronized therewith, whereby the shot insertion can be secured in an air stream if the entire rifle system is completely omitted.

The invention is based on the finding that by arranging the rifle track and the blade fastening mechanism on a drive arm instead of an oscillating link - as is the case with the known classic looms - a mechanism can be developed, with a row of confusors instead of the rifle is arranged, with the shed open in the The shed opening forms an air channel and when the weft is moved below the plane of the woven fabric, it does not form an obstacle in the weft process.

In order to achieve the stated goal, a constructional arrangement for use in the looms was developed, which with a four-bar drive mechanism, a sley, a thread storage device, at least one main nozzle introducing the weft thread into an opening of a shed, and elements for guiding air flow, in particular a confuser ¬ row is equipped, and according to the invention the elements directing the air flow, in particular the row of confusors guiding the thread, the main nozzle and the thread store are arranged on a common holding element, which forms a central link of the four-joint drive mechanism of the sley and with this means a Kuppelstaπge firmly connected and movable together.

It has been shown to be an advantageous embodiment if the fade store, the main nozzle and the row of confusors are arranged on the common holding element in such a way that the outlet opening of the storage area of the yarn store, the central axis of the main nozzle and the center line of the row of confusers are arranged in a line .

Another advantageous further development of the invention is the solution where the center line of the row of confusors is arranged on the common holding element, which is movably connected to the coupling rod of the drive mechanism of the sley, in such a way that it is in a preselected position trajectory regions describes that the viergeleπkigen drive at a Wiπkelverdrehung from 130 to 160 °, in particular of 140 to 150 ° of the main shaft provided with a crank ^• Mechanism - the sley cross the shed opening and lie under the plane of the woven fabric during the process of striking (pushing in) the weft.

It is to be regarded as expedient if at least the confusion row is arranged on a shop block, which is movable together with the coupling rod of the drive mechanism and is designed as the common holding element.

For the constructional arrangement according to the invention, a thread storage unit was also developed, which can be used both as an independent unit of other looms, and as an advantageous addition to the proposed arrangement, and an input opening, which is assigned to an auxiliary nozzle provided for the insertion of a thread, a cover and a cover contains parallel footplate, is further formed with a storage space, which is delimited in the direction of the guiding of the thread with a side wall which moves away from a plane of symmetry bisecting the cross-section, and in the direction of the transfer of the weft thread an area with a widening area Cross section, wherein according to the invention has an exit opening for removing the thread, which is located in the plane of symmetry on the end face opposite the entrance opening, the storage space is formed with an area whose cross section is in one with the the enlarged cross section marked area tapered part, and the storage space is formed with a side wall containing additional openings, which are provided for supplying the air.

It is advantageous if the side wall of the storage space is formed from wall elements which consist of a base plate, a cover and a variable number of interchangeable insert plates arranged in layers between them. and in the area of the side wall. the additional openings are formed by means of shim plates which are arranged between the insert plates, furthermore that the cover is preferably made of transparent material.

Another alternative possibility is that the additional openings are designed as channels which are at least partially delimited by toothed plates that overlap one another, the toothed plates being arranged on top of one another in a variable number at least partially forming the side wall of the storage space.

Yet another advantageous arrangement arises in such a way that the side wall of the storage space consists at least partially of a metallic or other screen material.

Based on practical experience, it is expedient to design the proposed thread storage unit in such a way that it is formed with an enlarging storage space area, the side wall of which is arranged in the direction of the thread transfer from the plane of symmetry bisecting the cross section, wherein the angle of the distance is expediently variable and is preferably in the acute angle range of 1 to 2 °.

In order to ensure the optical control of the formation of the thread reserve and the possibility of easy cleaning of the storage space, it is advantageous if the lid is made of glass or other transparent material and is connected to a band hinge by rotation for opening.

The inventively proposed constructional arrangement as well as the novel fade storage unit can be considered as components of looms of new construction to be projected, as well as elements in Remodeling of existing looms can be used to realize the pneumatic insertion of the weft. The solutions according to the invention are shown in more detail below with reference to the accompanying drawing. 5 The drawing contains some advantageous examples of the embodiments of the solutions according to the invention, namely shows

1 shows the drive mechanism of the loom of a loom of a traditional construction with 10 a shooter, the relative position of the katte, the weave and the blade construction being visible, FIG. 2 shows the construction according to the invention

Arrangement of a loom, the l ^~ system of pneumatic insertion of the

Shot was shown in side view, '-' ^*

3 shows the kinematic diagram of the drive mechanism with four joints of a sley,

4 shows a fragmentary illustration of a part of the arrangement according to the invention, with an example of an installation of the important elements,

25 Fig. 5 is the top view of a proposed

Thread storage unit with pneumatic parts, as well as the associated auxiliary nozzle, partly in cross section,

6 shows the cross section A-A of the thread storage unit of FIG. 5.

7 shows the working diagram of a construction containing fadeπabzugelemeπte and feed elements with a conical drum,

8 shows the arrangement of the provisionally stored 5 thread reserve in the thread storage unit, 9 shows the diagram of a thread storage unit proposed according to the invention with additional openings in the side wall, in cross section, and

10 shows another embodiment variant of the side wall of the fade storage unit, in cross section. As can be seen in FIG. 1, a blade 6 in the known looms with shooters ensures the engagement or stop of the weft. The blade 6 is provided with a shutter swivel 4, which can be rotated about a shutter swivel shaft 5 as the axis of rotation, the shutter swivel 4 forming the swing arm of a four-joint drive mechanism of a sley. In the _5 weft stop, the upper level of a holding element (block) 9 is close to a weave, parallel to it. In such a sheet construction, which makes the above-mentioned movement, no row of confusors can be arranged before the sheet 6, since that in the case of the sheet

20 of the sheet 6 below the level of the woven fabric could not submerge sufficiently. Using the constructional arrangement according to the invention, the above-described construction, as was shown in FIG. 2, is converted into a loom, which the

25 Introduction of the shot on a pneumatic principle secures. It is clearly visible that the sheet 6 and a row of confusors 12 guiding the air flow are arranged in a common holding element 9. The holding element 9 is firmly connected to a coupling rod 3, which

30 middle link of the four-joint drive mechanism of the sley forms. In this way there is a common movement. In the space which also moves with the coupling rod 3, the location of the center line of the confuser row 12 is selected such that it moves along a path.

35 is loaned, which has areas which during a Guide the angular rotation from 130 to 160, and in particular from 140 to 150 °, one of the main shafts 1, which is designed with a crank 2, through the opening of the shed and underneath during the working shot

5. the level of the woven fabric 8. Therefore, the Konfusor¬ row 12 when opening the shed in the opening thereof (period of weaving) and at the stop it counts under the end region of the inverted woven fabric 8, the moving sheet 6 impressing the weft.

10 The kinematic scheme of the inventive

The arrangement can be seen in FIG. 3, the sley with a four-articulated drive mechanism also being visible. The coupling rod BC has the following characteristic positions: in the position B _j Cγ the con ¬

15 row 12 for guiding the air flow in position I under the

Edge of the woven fabric 8 and thus the front dead center position of the sheet 6 is created and during this the weft is carried out. This position includes the angular position 0 ° of the main shaft 1. In the position B _T yC _ττ the * 20 inner opening of the confuser row 12 as a whole is in the opening which arises from shed branches 7 and this position corresponds to the beginning of the weft, whereby the main shaft 1 can be marked with angular position 110. In the place BTTTCTTT is the Konusorzeile 12

25 for guiding the air flow in the opening of the woven fabric, the sheet 6 being in the back rest position. In this position, the insertion of the weft can be carried out or continued without obstacles. The

The main shaft 1 is assigned to the angular position 174. In the

30 position B _j Cr, the inner opening of the confuser row 12 can touch the plane of the warp shed of the lower shed branch 7. This means the end of the insertion of the shot, which includes the angular position 258 ° of the main shaft 1. From the above it is clear that the means

35 line of the confuser row - 12 along such a path moves between the positions Ba -rC ,,. and B _TV C _{TV of} the cupola 3, ie during the angular rotation of 258-110 = 148 ° of the main shaft, has such web areas that are always present in the opening of the shed or are guided thereby. Under such conditions, the injection can be carried out or continued without any background. In position B C., the row of confusors 12 for guiding the air flow falls under the edge of the woven fabric. The trajectory curves of the tip of the elements shown in the figure show that there is a distance a_ between the edge of the woven fabric 8 and the point in the layer V, and therefore the row of confusors 12 can be shifted under the woven fabric with a high degree of certainty.

In Fig. 4 are some important Koπstruktioπsieile the proposed arrangement and their relative location. see. The figure it may be that an auxiliary nozzle 24, a Fadeπspeicher 2G, a main nozzle 23 and the sheet member 6 associated Konfusorreihe 12 for guiding the air stream on a common Halte¬ 9 arranged be kl _^ ar entnomme "', in such a way that the center axis of the auxiliary nozzle 24, an outlet opening 23 of the thread store 20 for executing a weft thread 14 from the storage space of the latter, the center axis of the main nozzle 13 and the center line of the row of confusors 12 are in a line Before the auxiliary nozzle, a unit known per se for pulling off the thread is advantageously used, which consists of a feed drum 15 and a feed roller 16, the feed drum 15 being able to move at constant rotational speed 17 and an air space 18 surrounding the latter is used, for which purpose by an air lei tion 19 compressed air can be introduced. The Storage space of the Fadeπspeicher 20 is closed from above with a cover 22, which is preferably made of transparent material and is arranged to be rotatable about an axis. The auxiliary nozzle 24 works continuously, it blows the weft thread into the storage space of the fade memory 20, in which such flow conditions have been ensured that the inflowing thread is deposited in the form of aft in the manner shown in FIG. 8. A Fadeπreserye 27 is thus created, the length of which corresponds to the width of the woven fabric. This thread reserve 27 is formed after each entry.

The proposed thread storage unit can be used both in the constructional arrangements of the looms according to the above and in looms of different construction. Some designs can be seen, for example, in FIGS. 5 and 6, a partial cross section also being visible. The Figures, the 20 Falleπspeicher a Eingangsöffπuπ ^'g 21, a lid 22, and a Parallel to base plate 36. The entry opening 21 is assigned to the auxiliary nozzle 24 for feeding the thread, the cover 22 is expediently produced from a transparent material and is arranged to be rotatable about a band hinge 26. The see-through are z. B. organic or aπ- organic glass. A storage space is provided in the thread store 20, the height of which is h_ and is designed with a widening cross section in the direction of the transfer of the weft thread, and another area is connected to this area, the cross section of which tapers in the direction of the exit opening 23 of the thread. A side wall is used in the storage space, which moves away from the symmetry plane, which halves the cross-section, in the direction of the continuation of the thread. The side wall of the storage space is provided with additional openings 25, as a result of which air can be fed in. While the loom is working, between two shots The length of the thread fed continuously through the auxiliary nozzle 24 into the storage space of the thread store 20 can be adjusted by means of a unit for pulling off the thread. This deduction unit is visible in FIG. 7 and the principle of operation has also been shown there. If the feed roller 16 is displaced in the direction of the arrow 28 (shown by a broken line), the length of the thread introduced increases in accordance with the increase in the circulating speed, since the radius R is increased in this way. A displacement of the feed roller 16 in the direction of arrow 29 has a counteracting effect and leads to a reduction in the length of the thread. 8 shows the design of the thread of the thread reserve 27 in the thread store 20. The length of the thread stored in the storage space corresponds to the

Inclusion requirements. The thread is practically without through the main nozzle 13 from the storage space

Resistance pulled out and blown through the confuser row 12. The main nozzle 13 moves together with the sley. Experience has shown that the height 1_ of the inner storage space should be selected depending on the thread fineness. If the fineness is from 20 to 40 tex, the height h = 1.5 to 2 mm is particularly favorable. Experience has also shown that in the case of the thread stores 20, the area of the storage space with an increasing cross-section is to be limited with a side wall that extends from one another in the direction of the thread's continuation at an acute angle of 1 to 2 °, measured from the bisecting the cross-section Plane of symmetry, removed. Since the latter value and the optimal angle values depend on the fineness and quality of the thread, it is expedient to design and use the thread storage units with a controllable extension. In the storage space of the Fadeπ storage unit, the regular shape of the stored stored thread can only be guaranteed in the event that the air blown by means of the auxiliary nozzle 24 can flow out through the additional openings 25.

According to the invention, thread storage units according to FIG. 5 can be formed, the additional openings 25 being produced as bores. However, it has proven to be very expedient to build up and use fadeπspeichereiπ- heiteπ- with variable heights from such elements, the sideπwaπdungeπ consisting of insert plate 32. The latter are arranged on the base plate 36 from 0.2 to 0.8 mm thick by means of screws 30 and nuts 34, the additional openings 25 being secured by means of shim 33. As can be seen in FIG. 9, the latter enable the production of free airways. In another advantageous embodiment of the proposed thread storage unit, the side wall of the thread storage 20 consists of several layers of toothed plates 35, the teeth of which are arranged opposite one another in the adjacent layers. The teeth of the toothed plates 35 are to be formed with such a depth that the plates lying one on top of the other may only partially overlap one another and in this way channels are formed which form the additional openings 25 and thus the necessary air passages. In such an embodiment, the height h_ of the storage space can be set to the optimum value by selecting a necessary number of toothed plates 35 with a thickness of 0.2 to 0.8 mm. Likewise, it has proven to be advantageous to use such solutions, the side wall of the storage space consisting at least partially of a screen material, the base material of which can be metal, for example. The most important advantage of the invention The arrangement is that the traditional looms equipped with a shooter can be easily converted to pneumatic work looms, which increases the speed by 50 to 100%, eliminates the need to wind up the weft and insert the bobbin, so it increases

Productivity of work. Using the pneumatic thread storage unit according to the invention, the field of application of the pneumatic (working with air flow) looms can advantageously be enlarged, since these can also be made suitable for processing continuous thread.

Claims

Claims:

1. Konstruktioπelle arrangement for weaving looms with pneumatic introduction of the shot, the charging with a \ iergelenkigen Antriebsmechaπismus a web, a Fadeπspeicher, at least one thread to Schuss¬ in an opening of a shed introductory HauptdL ^'se, as well as elements for guiding air flow, in particular a Kon usorzeile is equipped, wherein the elements guiding the air flow are arranged or formed on a vibrating sheet ice, characterized geker nze i chn et that the elements directing the air flow, in particular the Konfusor¬ row 12) leading the thread, the The main nozzle (13) and the fadeπspeicher (20) ai-f a common holding element (9, 9 ') are arranged, which forms a central link of the four-joint drive mechanism of the sley and firmly connected to this by means of a coupling rod (3) and common : is movable ..

2. Konstruktioπelle assembly of claim 1, dadLrch gekennze ichnet that the thread store (20), cie main nozzle (13) and the Konfusorreihe (12) on the common support element (9, 9 ¹⁾ is arranged are ^'cass the Ausgaπgsöffnung (23 ) of the memory space of the face memory (20), the central axis of the main nozzle (13) and the center line of the row of confusors (12) are arranged in a line.

3. Konstruktioπelle arrangement according to claim 2, characterized geke nnz e i chnet that the Mittel¬ line cer Konfusorreihen (12) on the common holding element (9, 9 ') which with the coupling rod (3) of

Aπtrietsmechaπismus the sley is movably connected, is arranged such that is located in a preselected position that describes such trajectory areas that at an angular rotation of 130 to 160 °, in particular 140 to 150 °, that with a crank (2) the main shaft (1) provided the viergelenkigeπ drive input mechanism of the sley cross the Webfachoffnung and weft lie during Arbeitsgaπges of the stop _(^ swage below the plane of the woven fabric.

4. Constructional arrangement according to one of the

Claims 1 to 3, characterized in that at least the row of confusors (12) is arranged on a loading block, which together with the coupling rod

(3) of the drive mechanism is movable and is designed as the common holding element (9, 9 ').

5. Fadenspeicherereiπheit for looms with pneumatic insertion of the weft, in particular for looms with a structural arrangement according to one of claims 1 to 4, which further includes an inlet opening which is associated with an auxiliary nozzle provided for the introduction of a thread, a cover and a footplate parallel thereto is formed with a storage space which is delimited in the direction of the guidance of the thread with a side wall which is distant from a plane of symmetry bisecting the cross section and which has an area with a widening cross section in the direction of the transfer of the weft thread, characterized in that has a Ausgangπgs- opening (23) for removing the thread, which in the Symmetrieebeπe on the end face opposite

Input opening (21) is located, the storage space is formed with an area, the cross section of which tapers in the part connected with the increasing cross-section, and the storage space is designed with an additional opening (25) containing side wall, which for Air supply is provided.

6. Thread storage unit according to claim 5, characterized in that the side wall of the storage space is made from Wandelemeπteπ. which consist of a base plate (36), a cover (21) and a variable number of interchangeable insert plates (32) arranged in layers between them, and in the area of the side wall the additional openings (25) by means of shims (33) are formed, which are arranged between the insert plates - (32), furthermore that the cover - (22) is preferably made of transparent material.

7. Fadeπspeichereiπheit according to claim 5, characterized thereby that the additional openings (25) are designed as channels, which are at least partially delimited by tooth slots (35) overlapping tooth slots, the toothed plates (35 ) arranged on top of one another in a variable number at least partially form the side wall of the storage space.

8. Fadeπ storage unit, according to claim 5, characterized by the fact that the side of the storage space consists at least partially of a metallic or other sieve material.

9. Thread storage unit according to * one of claims 5 to 8, characterized in that a storage space area is formed with a larger area, the side wall of which is arranged in the direction of the transfer of the thread away from the plane of symmetry bisecting the cross section, the The angle of the distance is expediently variable and is preferably in the acute angle range of 1 to 2 °.

10. Fadeπspeichereiπheit according to any one of claims 5 to 9, characterized in that the

Cover (22) consists of glass or other transparent material and is connected to open by rotation with a band hinge (26).