EP0026492A1 - Procédé et dispositif pour la confection de tapis ou analogues par insertion de boucles de fil dans un tissu de fond - Google Patents

Procédé et dispositif pour la confection de tapis ou analogues par insertion de boucles de fil dans un tissu de fond Download PDF

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Publication number
EP0026492A1
EP0026492A1 EP80105898A EP80105898A EP0026492A1 EP 0026492 A1 EP0026492 A1 EP 0026492A1 EP 80105898 A EP80105898 A EP 80105898A EP 80105898 A EP80105898 A EP 80105898A EP 0026492 A1 EP0026492 A1 EP 0026492A1
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EP
European Patent Office
Prior art keywords
thread
needle
hollow needle
base fabric
needles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP80105898A
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German (de)
English (en)
Inventor
Hartmut Scholz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19792939851 external-priority patent/DE2939851A1/de
Priority claimed from DE19792941903 external-priority patent/DE2941903A1/de
Application filed by Individual filed Critical Individual
Publication of EP0026492A1 publication Critical patent/EP0026492A1/fr
Withdrawn legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C15/00—Making pile fabrics or articles having similar surface features by inserting loops into a base material

Definitions

  • the invention is directed to a method for tufting carpets or the like. Goods on a prestressed and to a goods tree or the like. moving base fabric with a hollow needle forming the two-legged knob by double piercing from the back of the fabric along the stitch length, which guides the thread from which the thread length forming the knob is cut off by a cutting device.
  • a double needle has also already been used, in the lugs of which are aligned with one another, the cut thread is inserted into the base fabric before the needles are inserted.
  • the thread is generally introduced with compressed air from the needle foot in the direction of the needle tip in the case of hollow needles and cut to the predetermined length by a cutting device arranged on the needle or upstream of its foot.
  • All previously known devices can process only one thread per needle, so that practically only single-colored tufted products are obtained, at most with several needles arranged in parallel next to each other, strips of the same color in the longitudinal direction of the goods. It has so far not been possible to produce colorful tufting goods by successively processing different colored threads from one and the same needle, possibly alternating from pimple to pimple. The same applies to the production of structured goods if you want to process differently constructed threads or threads of different thicknesses at the same time.
  • the object of the invention is to provide a solution to this problem, which opens up completely new possibilities for tufting technology, and this also applies to single-needle and multi-needle devices.
  • the basic principle of this method is to be seen first of all in that the thread used for forming the knobs is inserted from the tip, so that the needle itself is largely relieved of the thread transport in addition to the thread entry into the base fabric. As a result, it is also possible to make a selection from a plurality of available threads by means of a measure that is independent of the needle.
  • Another particular advantage of this method is the fact that one leg of the knob is inserted into the base tissue within the hollow needle, and does not come into contact with the tissue at all.
  • the individual needles successively carry out a certain number of work steps in a direction transverse to the direction of movement of the basic tissue, then a work step opposite to this direction of movement and then an identical plurality of work steps in the opposite direction to the direction of movement of the basic tissue.
  • This method is suitable both for single-needle devices and preferably for devices with a large number of needles lined up next to one another, which, which of course relieves the design of the device for this purpose, can be arranged at a correspondingly large distance, for example six knobs or approximately 2 cm .
  • the basic feature of the method according to the invention lies less in the particular way in which the thread is sucked into the hollow needle, but in the insertion of the thread from the front, i.e. out of the nub side of the base fabric and not, as was previously the case, through the rear shaft of the needle.
  • this insertion of the thread from the nub side of the base fabric obviously does not require vacuum suction, but can also be solved in another way, provided that a gripper device mounted longitudinally displaceably in the needle has the additional advantage that the dimensioning device, which is intended to interrupt the thread pulling in, when / a desired thread section corresponding to approximately twice the nub length has been drawn in, can be assigned to the transport device of the gripper device. It therefore does not need to be assigned to the thread store, which in practice means a higher construction effort.
  • the invention also relates to a device which is preferably suitable for carrying out this method.
  • this essentially consists in that, parallel to the plane of the base fabric on the rear side, a needle carrier with a row of hollow needles arranged at the same distance and extending transversely to the direction of tissue movement can be raised and lowered and the base fabric and the needle carrier in the direction the row of needles relative to each other are gradually moved back and forth by an amount corresponding to the distance between each two needles, and that each needle is assigned a thread store on the nub side of the base fabric, each of which has a plurality of ends that open in a plane common to the needle has a thread-fed thread guide, one of which is adjustable in a top position aligned with the hollow needle, that further in the movement path of the company dens on the knob side of the base fabric between the thread store and the hollow needle, the cutting device is arranged and that finally the drives for the movement of the base fabric, the needle carrier, the thread store, the cutting device and for the vacuum to be applied
  • the needle carrier extends practically over the entire width of the goods, which enables highly efficient production, and it is mounted so that it can be raised and lowered at least in a vertical plane in order to enable the needles to be inserted into the base fabric when the knobs are formed.
  • the further movement between the needle carrier and the base fabric can be accomplished both by a gradual movement of the needle carrier relative to the fixed base fabric, or, in reverse of this principle, by the fact that the base fabric relative to the fixed needle carrier gradually or transversely to its to the goods tree or the like. leading direction of movement is reciprocable. Which embodiment is preferred depends on the circumstances of the individual case.
  • the basic principle according to the invention is fully realized in both cases.
  • Another essential feature of the invention is the assignment of a thread store to each needle, namely the thread store is arranged on the knob side of the base fabric and thus independently of the needle.
  • the thread guides can carry threads that are the same as well as different colors, as well as threads of different strengths, as well as threads of different materials, which allows a great variety of possibilities when carrying out the method.
  • By arranging the cutting device on the knob side an exact cut is made, which makes it unnecessary to subsequently level the knob height.
  • the common control of practically all movable elements that can have a common or separate drives, specifically in the form of electric motors, hydraulic or pneumatic motors, magnetic drives and the like. They are managed by a controller influenced by a data carrier.
  • Such a data carrier can be, for example, a punched card, but also, which is a particular advantage of the invention, an optical scanning device which, for example, reads the colors from a colored sample that is scanned step by step and inputs the control, in particular the thread memory.
  • the needle carrier consists of a bar spanning the maximum fabric width, which has a longitudinal channel connected to a vacuum source and a plurality of bores opening into it, each of which has a hollow needle inserted therein. If the full machine width is not used, e.g. for products of smaller width, these holes or the needles can be closed in order to maintain the vacuum on the working needles.
  • a first alternative of the invention provides that the base fabric is guided over a known tensioning device acting on both sides of the tensioning device and a tensioning beam running transversely to the latter, the trailing edge of which is arranged directly next to and parallel to the row of needles. This ensures that the hollow needles are correctly inserted into the tissue without this causing the needle to move. can dodge.
  • the tensioning device can be mounted so that it can be moved step by step in the direction of the needle row with the tensioning bar and the fabric tree.
  • the needle carrier is mounted in a vertical guide for the piercing movement of the hollow needles into the base fabric.
  • the needle carrier is mounted in a longitudinal guide for a movement lying in its longitudinal extension or in a direction corresponding to the row of needles, and the longitudinal guide is mounted in a vertical guide directed perpendicularly thereto.
  • the two movements are assigned to the needle carrier, and the base fabric only takes over the transport movement in the direction of the goods tree, in each case when a further row of knobs has been completed.
  • the cutting device consists of a number of pairs of cutting edges corresponding to the number of hollow needles, of which one cutting edge is fastened to a stationary cutting edge and the other cutting edge is fastened to a cutting beam that can be pushed back and forth.
  • a scissor-like cutting device deserves preference for practical reasons, other cutting knife devices are also possible, but are known per se.
  • each thread store has a number of thread guides that corresponds at least to the number of different threads to be processed simultaneously.
  • a number of about five to six thread guides is sufficient, but more thread guides can of course also be arranged in a thread store, although this complicates the construction of the device.
  • each thread is guided independently in such a thread guide, so that a perfect thread guidance and thus trouble-free working of the device is guaranteed.
  • the thread guide according to the invention consists of a tube, the mouths of which lie on a circular arc and the feed openings on an axis through the center of the circular arc, perpendicular to its plane.
  • the thread store is preceded by a device that measures the thread length required for the formation of knobs. Since this device for cutting the respective thread is independent of the needle and other parts of the device, there is an exact nub length.
  • the Be horrseirnichtung can in two spaced apart, opposed alternately opening and closing F adenbremsen and have adenmineer between two yarn brakes a F, the side opposite the closed yarn store the yarn brake causes the yarn feeding and has an adjustable stroke.
  • Such a device works in such a way that first the path of the thread from the bobbin to the measuring device is released by closing the needle-side thread brake and the thread conveyor, which according to another feature of the invention a between the two thread brakes transverse to the thread course in the path of movement of the thread engaging and reciprocating slide with adjustable stroke can deform the thread into a loop which, when the needle-side thread brake is open and at the same time the thread brake facing the thread supply is closed, is free to the thread retraction into the needle caused by the vacuum at the needle tip is available.
  • the N oppen length is then in any case exactly the same Trouch here it is crucial that these measures, the needle and its associated components remain unloaded.
  • the thread store is pivotably mounted about an axis of rotation cut through an axis through the hollow needle and has a magnetic control corresponding to the angular positions of the thread guide orifices.
  • a control works extremely precisely and sufficiently smoothly, so that the necessary adjustment of the thread store can take place in a very short time, so that the thread guide guiding the respectively desired thread can be brought into the upper position aligned with the hollow needle.
  • the transverse guide of the needle carrier, the cutting device and the thread store have a common frame, which is arranged in a longitudinal guide transversely to the direction of movement of the base fabric and can be pushed back and forth.
  • the combination of these elements which can be moved step by step contributes to the precise work of the device.
  • a crank drive, eccentric drive, servomotor or the like acting on the needle carrier be arranged.
  • the individual case determines the respective choice of drive. It is particularly expedient if the drive simultaneously actuates a control valve in the vacuum line to the needle carrier.
  • the invention provides that the data carrier for the control is a punch card, i.e. a punch card-controlled drive is used and / or that the control for the thread memory has a device for optically scanning a color sample of the goods by means of an exposure meter, the pointer deflection of which is the magnet for controls the pivoting movement of the thread store, this exposure meter assigned to the individual needle being arranged so as to be movable over the template in the work cycle of the needles.
  • the data carrier for the control is a punch card, i.e. a punch card-controlled drive is used and / or that the control for the thread memory has a device for optically scanning a color sample of the goods by means of an exposure meter, the pointer deflection of which is the magnet for controls the pivoting movement of the thread store, this exposure meter assigned to the individual needle being arranged so as to be movable over the template in the work cycle of the needles.
  • the hollow needle can thus also be slit laterally over at least part of its length. This slitting makes it possible, for example, for the gripper device to have larger dimensions in a transverse direction than the diameter of the hollow needle.
  • Another advantage of the gripper device according to the invention is that the thread is not drawn into the needle and its return stroke does not have to be carried out in succession. Instead, it is also possible that the return movement of the gripper device overlaps at least partially in time with the return stroke of the hollow needle, in extreme cases both return movements are carried out simultaneously.
  • a sleeve that can be connected to a vacuum source can be provided as the gripper device, at the front end of which the thread protrudes from the hollow needle is sucked in and held in place when the sleeve is pulled back.
  • the inner diameter of the sleeve is either smaller than the outer diameter of the thread, so that the thread can not be fully pulled into the sleeve, but is only held at its front tip by suction, or the sleeve is provided with a perforated cover to which the Thread is then sucked in regardless of its thickness.
  • the gripper device has a mechanical clamping device that detects the end of the thread like a pliers tion detected, the necessary transverse movement of such a clamping movement, as well as the larger lateral dimension required for this is ensured on the one hand by the possible slitting of the hollow needle.
  • the hollow needle can be widened in its base section, which remains below the base fabric, for receiving the displacement and / or actuation mechanism of the gripper device.
  • the base fabric 1 forming the basis of the goods is drawn off from a supply roll (not shown) and is guided in the direction of arrow 2 via a tensioning bar 3 to the goods tree 4 or another take-off device.
  • the formation of a knob consisting of two legs 6 and 7 connected by the web 5 proceeds as follows, as explained with reference to FIGS. 1 and 2 in a first exemplary embodiment:
  • the hollow needle 10 which can be raised and lowered directly on the rear side 8 of the tensioning beam, is in the starting position a) below the base fabric 1.
  • the needle 10 is guided upwards in the direction of arrow 11 and thereby pierces the base fabric 1. It is aligned with the one Extending thread end 12 to be explained later.
  • the hollow needle 10 is connected to a vacuum source and the thread 13 used to form a knob is drawn into the hollow needle 10 as far as the previously measured free thread length allows (position c).
  • the needle 10 returns to its starting position, the (not yet separated) thread 13 not following this movement, so that the knob leg 7 is already in its fixed position with respect to the base fabric 1.
  • each of the hollow needles 10 located next to one another in a row initially carries out a step 18 in a direction transverse to the withdrawal movement 2 of the goods, and a knob is introduced in each of these steps 18.
  • the diagram shown is four such successive steps 18.
  • the fabric tree 4 leads the woven fabric 1 or the finished goods by a step 19 in the direction of the arrow 2, so that a knob is now created in this direction.
  • This is now followed by four working steps 18 of the hollow needle 10 in the opposite direction. This process is repeated any number of times over the entire length of the goods.
  • the total path of the needle 10 transverse to the direction of movement 2 of the base fabric 1 in this scheme consisting of four individual steps corresponds to the distance between two needles arranged next to one another, so that the entire width of the base fabric is provided with corresponding knobs.
  • a series of bores 21 are made at regular intervals, into each of which a hollow needle 10 is inserted with its base 22.
  • the holes 21 open into a channel 23 which is closed at one end and at the other end with one not in the individual reproduced vacuum source is connected, with a closing valve being interposed.
  • This needle carrier 20 is mounted at its front ends in a vertical guide 24, for example a dovetail guide, in the direction of the double arrow 25 so that it can be raised and lowered so that the needle carrier 20 can perform the piercing movement of the needles 10.
  • the two-sided vertical Guided Tours 24 are of a generally designated 26 on the limb 27, is secured over the entire apparatus width extending frame, which in turn in a dovetail guide 28 transversely to the movement direction 2 of the base fabric 1 - is displaceably mounted.
  • a crank or eccentric or servomotor drive is mounted, which on the other hand engages the needle carrier 20 and causes its lifting and lowering movement 25 relative to the frame 27. The transverse displacement makes the needle carrier 20 together with the frame 27.
  • a cutting device 30 is also attached to the frame 27, the stationary cutting bar 31 of which is mounted directly on the frame 27 and carries the cutting edges 32.
  • the movable cutting bar 33 is mounted for longitudinal displacement in a guide on the cutting bar 31. It carries the movable cutting edges 34 of the cutting device.
  • the cutting movement can in turn be effected by an eccentric or crank drive which is mounted on the frame 27 or on the fixed cutting bar 31.
  • the cut is, as shown in FIG. 3 only approximately, in the nub height 36, so that a later leveling cut is generally unnecessary as a result of this and by exact dimensioning of the thread 13 forming the nub.
  • a thread store 40 is arranged on an upper leg 37 of the frame 27 for each needle 10 and is guided on two circular-shaped guides 41. In the embodiment shown, it has six tubular thread guides 42, which open out on an arc 49 in a common plane perpendicular to the course of the row of needles. In contrast, the feed openings 43 of these thread guides 42 lie in a row which corresponds to the pivot axis of the thread store 40, which is approximately sector-shaped.
  • a control head 45 is attached to a leg 44 molded onto the thread storage device 40 and moves on an arc opposite the control magnets 46, the arrangement of which corresponds to the position of a mouth 47 of a thread guide 42 in alignment with the hollow needle 10. The plane in which the openings 47 lie also has the needle 10.
  • a dimensioning device 50 for the thread length 13 required to form a knob is connected upstream of this thread store 40.
  • the latter has an outer thread brake 52 and an inner thread brake 53, each of which consists of a fixed bar 54 and a bar 55 that is movable relative thereto.
  • the movable bars 55 can be moved alternately by means of a linkage 58 which can be pivoted about the articulation point 56 in the direction of the double arrow 57 such that one of the two thread brakes 52, 53 is always closed.
  • a linkage 58 which can be pivoted about the articulation point 56 in the direction of the double arrow 57 such that one of the two thread brakes 52, 53 is always closed.
  • a linkage 58 which can be pivoted about the articulation point 56 in the direction of the double arrow 57 such that one of the two thread brakes 52, 53 is always closed.
  • a slide 60 can be pushed back and forth in the direction of arrow 61 with an adjustable stroke in a guide 59.
  • the thread brakes 52, 53 or their brake shoes 54 and 55 are mounted in a side frame 62. guided. Since each thread store 40 has to hold a plurality of threads 51, these are each separated by a partition wall 63, which is interrupted only for the passage of the slide 60.
  • an optical reading device 70 can be provided, on the screen 71 of which a possibly colored sample template 72 of the product to be manufactured is placed. This is thrown onto the visible surface 73, which is scanned by an exposure meter 74, which is highly sensitive and responds to different shades of gray even in the case of color samples of the pattern.
  • the display shows a deflection of the pointer 75, which then acts on one of the photocells 76, which actuate the magnets 46 and thus cause a movement of the thread store 40 in such a way that the mouth 47 of the thread guide 42 carrying the desired thread with the tip the needle 10 is aligned.
  • the desired thread pattern can be obtained by any change of, available from a selection of bene when n householdgege- embodiment, six strands in the produced goods are to be reproduced, which is displayed in the template 72nd
  • the thread 12 which is brought into alignment with the tip 15 of the hollow needle 10 by a thread store, is not sucked into the fixed hollow needle 10 by a vacuum applied to the back of this hollow needle, but instead is one Gripper device 80a or 80b is provided.
  • the gripper device 80a is a sleeve, which can be connected on its rear side 81 to a suction source in order to suck the end of the thread 12 onto the tip 82 of the sleeve 80a and to hold it in this contact position by means of suction.
  • the hollow needle is widened in its base section 10 'remaining below the base fabric 1 in order to be able to accommodate this area in the displacement and / or actuation mechanism of the gripper device 80b.
  • This adjustment and actuation mechanism has only been indicated schematically in FIG. 9 with the aid of double arrows which represent the directions of movement.
  • the detailed design of the adjustment and actuation mechanisms can be carried out in the most varied of ways with the aid of conventional adjustment arrangements and is therefore not shown in detail. It is only indicated schematically how the clamping device 80b is moved inside the hollow needle 10 to pull in the desired thread length with the aid of the rod 83.
  • FIG. 8 and 10 show variants of the needle formation, the needle 10 in each case being provided with a longitudinal slot 84.
  • This longitudinal slot 84 is of particular importance when using a mechanical pincer-type clamping device, as shown in FIG. 9, since it is possible through this slot 84 that the clamping device is wider in the direction of its spreading movement than the hollow needle diameter.
  • the invention is not restricted to the exemplary embodiments shown. All that is essential for the present invention is the introduction of the thread into the hollow needle from the knob side of the base fabric with the aid of a gripping device that can be moved within the needle and grips the thread end.
  • the hollow needle can be arranged to be non-rotatable as well as rotatable about its longitudinal axis. This latter rotatability of the needle enables so-called single-needle machines to work from left to right and vice versa, a certain orientation of the needle obliquely cut off at the front end evidently being required for the correct guiding of the thread when piercing the base fabric a second time.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
EP80105898A 1979-10-02 1980-09-29 Procédé et dispositif pour la confection de tapis ou analogues par insertion de boucles de fil dans un tissu de fond Withdrawn EP0026492A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE2939851 1979-10-02
DE19792939851 DE2939851A1 (de) 1979-10-02 1979-10-02 Verfahren und vorrichtung zum tuften von teppichen o.dgl.
DE19792941903 DE2941903A1 (de) 1979-10-17 1979-10-17 Verfahren und vorrichtung zum tuften von teppichen o. dgl.
DE2941903 1979-10-17

Publications (1)

Publication Number Publication Date
EP0026492A1 true EP0026492A1 (fr) 1981-04-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP80105898A Withdrawn EP0026492A1 (fr) 1979-10-02 1980-09-29 Procédé et dispositif pour la confection de tapis ou analogues par insertion de boucles de fil dans un tissu de fond

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EP (1) EP0026492A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1855175A (en) * 1930-05-21 1932-04-26 Clarence A Braudes Looping and tufting machine
GB919904A (en) * 1960-12-22 1963-02-27 William Hill Kidderminster Ltd A method of and apparatus for manufacturing tufted pile carpets
FR1590747A (fr) * 1967-11-06 1970-04-20

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1855175A (en) * 1930-05-21 1932-04-26 Clarence A Braudes Looping and tufting machine
GB919904A (en) * 1960-12-22 1963-02-27 William Hill Kidderminster Ltd A method of and apparatus for manufacturing tufted pile carpets
FR1590747A (fr) * 1967-11-06 1970-04-20

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