EP3772549B1 - Einziehgreifer, einziehmaschine mit solch einem greifer und verfahren zum einziehen von kettfäden auf solch einer einziehmaschine - Google Patents

Einziehgreifer, einziehmaschine mit solch einem greifer und verfahren zum einziehen von kettfäden auf solch einer einziehmaschine Download PDF

Info

Publication number
EP3772549B1
EP3772549B1 EP19190024.0A EP19190024A EP3772549B1 EP 3772549 B1 EP3772549 B1 EP 3772549B1 EP 19190024 A EP19190024 A EP 19190024A EP 3772549 B1 EP3772549 B1 EP 3772549B1
Authority
EP
European Patent Office
Prior art keywords
yarn
gripper
along
path
receiving cavity
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.)
Active
Application number
EP19190024.0A
Other languages
English (en)
French (fr)
Other versions
EP3772549A1 (de
Inventor
Hanspeter Romagna
Igor Frommelt
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.)
Staeubli Sargans AG
Original Assignee
Staeubli Sargans AG
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
Application filed by Staeubli Sargans AG filed Critical Staeubli Sargans AG
Priority to EP19190024.0A priority Critical patent/EP3772549B1/de
Priority to CN202010779678.XA priority patent/CN112323229B/zh
Publication of EP3772549A1 publication Critical patent/EP3772549A1/de
Application granted granted Critical
Publication of EP3772549B1 publication Critical patent/EP3772549B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00—Auxiliary apparatus combined with or associated with looms
    • D03J1/14—Apparatus for threading warp stop-motion droppers, healds, or reeds

Definitions

  • This invention relates to a drawing-in gripper for drawing warp yarns of warp into several elements of a weaving harness. This invention also relates to a drawing-in machine for drawing-in warp yarns and to a process for drawing-in warp yarns onto such a machine.
  • the technical field of the invention is the field of weaving preparation where a set of warp yarns, typically several thousands of warp yarns, must be drawn into several weaving harness elements, such as heddles, drop wires or a reed, intended to equip a weaving machine for weaving operations.
  • the warp yarns must be drawn-in, into the harness elements, and arranged in parallel to each other, following a specific order, in relation to the heddles whose vertical oscillations will define the shed motion in the weaving loom.
  • EP-A-2 199 443 discloses a mobile threading unit for threading warp yarns coming from two warps into some elements of a weaving harness. Each yarn is threaded via a pulling movement of a gripper through the respective openings of the harness. With this known device, there is a risk that the gripper tip misses a heavy thread or a bouclé-like thread.
  • EP-A-0 460 129 discloses an apparatus for drawing-in warp threads with a gripper having two movable parts.
  • This gripper is rather complicated to manufacture and needs a specific control of its moving part.
  • the gripper opening might not be adapted for heavy/bouclé yarns and the hook may rip a heavy/bouclé yarn.
  • the gripper must be open during the reward motion, in order to free a yarn at the end of a drawing-in cycle, which can lead to synchronization problems and machine stops.
  • the closing of the movable parts can lead to a yarn compressing, to the jam of thread fibers, or worst, to the yarn breaking.
  • This invention aims at solving these problems with a new drawing-in gripper ensuring secure, fast and reliable drawing-in of warp yarns of different types, for instance heavy yarns, bouclé yarns, tapes and ribbons, so that the error rate of a drawing-in machine can be reduced during the weaving preparation.
  • the invention relates to a drawing-in gripper for drawing warp yarns of a warp into elements of a weaving harness along a drawing-in path, the gripper extending longitudinally along a main axis between a gripper nose and a coupling rear end for coupling the gripper to a linear drive.
  • the gripper defines a yarn-receiving cavity, which extends, between the gripper nose and the coupling read end. This cavity also extends through the gripper along a transverse axis perpendicular to the main axis.
  • the gripper forms a bite portion, which extends longitudinally at the rear of the gripper nose.
  • An entry opening of the yarn-receiving cavity is defined between a rear tip of the bite portion and a rectilinear back surface of the yarn receiving cavity.
  • the yarn-receiving cavity in a longitudinal plane perpendicular to the transverse axis, is L-shaped.
  • an angle, defined between the main axis and the rectilinear back surface and measured in the longitudinal plane and within the yarn-receiving cavity, is between 90° and 105°, preferably equal to 90°.
  • a warp yarn can be of any known type, in particular a heavy yarn, with a diameter of 1.5 or 2 mm, a boucl6 yarn, a tape or a ribbon.
  • the rectilinear back surface guarantees that a warp yarn previously introduced into the cavity remains in this cavity when the gripper reaches the first position. This avoids that the warp yarn gets out of the cavity prior to being drawn-in through the weaving harness. Due to the relatively simple geometry of the gripper, the warp yarn does not risk to be ripped or otherwise damaged during the drawing-in process. No movable part needs to be mounted on the gripper, which keeps the gripper simple, economic and reliable.
  • such a drawing-in gripper can incorporate one or several of the following features considered in any technically allowable combination:
  • this invention also relates to a drawing-in machine which benefits from the advantages of the above-mentioned gripper. More precisely, this drawing-in machine is for drawing-in warp yarns of a warp into elements of a weaving harness along a drawing-in path and includes a drawing-in gripper, a drawing-in station, said drawing-in station being part of a linear drive for driving the drawing-in gripper along the drawing-in path, in a backward direction between a first position and a second position and also in a forward direction between the second position and the first position.
  • This drawing-in machine also includes a yarn unit including yarn positioning means for positioning a portion of a yarn to be drawn-in a transfer zone located on the drawing path, near the first position.
  • the drawing-in gripper is as mentioned here above and the yarn unit includes a closing member provided with at least one closing surface located on at least one longitudinal side of the gripper, at least when the gripper is in the first position, these closing surfaces being oriented toward a yarn portion received in the yarn-receiving cavity and designed for preventing an exit movement of the yarn portion out of the yarn-receiving cavity and through the entry opening, at least when the gripper is in the first position.
  • such a drawing-in machine may incorporate one or several of the following features, considered in any technically allowable combination:
  • this invention relates to a process for drawing-in warp yarns which can be of different types, in particular heavy yarns or bouclé yarns.
  • This process is for drawing-in warp yarns into one harness elements, of a weaving harness along a drawing-in path. It is implemented on a drawing-in machine which includes a drawing-in gripper, a drawing-in station belonging to a linear drive for driving the drawing-in gripper along the drawing-in path, in a backward direction between a first position and a second position and also in a forward direction between the second position and the first position, and a yarn unit including yarn positioning means for positioning a portion of a yarn to be drawn-in a transfer zone located on the drawing path, near the first position.
  • This process includes at least the following steps consisting in:
  • the drawing-in machine 2 partially represented on the figures includes a yarn unit 4 for positioning a portion 102 of a yarn 100 taken from a warp 200, which is very schematically represented on figures 1 and 4 only, at a smaller scale, for the sake of simplification.
  • the drawing-in machine 2 also includes a drawing-in station 6 schematically represented by a cubical box on figure 1 but visible on a larger scale and in a more realistic way on figures 2 and 3 .
  • the drawing-in machine 2 also includes a gripper 8 coupled to a ribbon 10 driven by the drawing-in station 6 to move this gripper 8 along an axis X2 of drawing-in machine, between a first position or extended position represented on figure 9 , where the gripper 8 cooperates with some parts of the yarn unit 4, and a second position represented on figure 2 , where the gripper 8 is located within drawing-in station 6.
  • the drawing-in station 6 includes a non-represented motor with a main axis defining a rotating disk coupled to the ribbon 10, which moves the gripper along the axis X2 such that the drawing-in station and the ribbon form a "linear drive" by simplification.
  • the drawing-in station includes another system for driving the ribbon 6 and the gripper in a linear way, for example a linear actuator.
  • the position of figure 2 is an intermediate position, where the gripper 8 is partly retracted and located between the first position and a fully retracted position, which is not represented and located at the opposite of the first position along the drawing path.
  • the drawing-in station 6 and the ribbon 10 form a linear drive for driving the gripper 8 along axis X2.
  • the gripper 8 moves in a forward direction F when going, along axis X2, from the partly retracted position of figure 2 to the extended position of figure 9 and in a backward direction B when going, along axis X2, from the extended position to the partly retracted position.
  • the drawing-in machine 2 includes a non-represented reed module with a movable support member for a reed 150 installed between the yarn unit 4 and the drawing-in station 6, so that the gripper 8 and the ribbon 10 can cross reed gaps 152 defined between adjacent dents 154 of the reed 150 and brought successively at the level of axis X2.
  • This reed module is capable of moving the reed 150 along an axis parallel to its longitudinal direction and perpendicular to axis X2, as shown by arrow A1 on figure 1 .
  • a non-represented heddle module belongs to the drawing-in machine 2 and allows successively feeding heddles between reed 150 and yarn unit 4, one of these heddles being represented with reference 160 on figures 1 , 4 and 11 .
  • Each heddle 160 is held by the heddle module in such a way that its eyelet 162 can be crossed by the gripper 8 and, possibly, by the ribbon 10 when the gripper 8 is moving along axis X2 between its first and second positions.
  • a non-represented drop wire module also belongs to the drawing-in machine 2 and allows successively feeding drop wires between reed 150 and yarn unit 4.
  • One of these drop wires is visible on figures 1 , 4 and 11 with reference 170.
  • Each drop wire 170 is fed by the drop wire module in such a way that its eyelet 172 can be crossed by the gripper 8 and, possibly, by the ribbon 10, when the gripper 8 is moving along axis X2 between its first and second positions.
  • Reed 150, heddles 160 and drop wires 170 belong to the harness of a loom to be equipped with drawn-in warp yarns.
  • the drawing-in machine 2 is configured so that the gripper 8 can pick-up a yarn 100 positioned within the yarn unit 4 and draw it successively through the eyelets 172, 162 and one reed gap 152 when travelling along axis X2 in the backward direction between its first and second positions.
  • axis X2 defines a drawing-in path of the gripper 8 between its first and second positions and vice-versa.
  • the front side of the yarn unit 4 is visible, for instance, on the left of figures 4 and 5 , whereas the front side of the drawing-in station 6 is visible on the left of figure 2 .
  • the front side of the gripper 8 is oriented toward the yarn unit 4 and visible, for instance, on figure 1 .
  • the drawing-in station 6 includes a guiding unit 61 which comprises a main body 62 mounted on a frame 22 of the drawing-in machine 2 and a heddle holder 64, mounted on this body 62 and adapted to hold a heddle 160 with its eyelet 162 aligned on axis X2.
  • This guiding unit is installed within drawing-in machine 2 between reed 150 and heddle 160, along the drawing path.
  • guiding unit 61 is not represented on figure 1 .
  • Two guide rails 63 and 65 are immobilized on the body 62 by screws 67 and define, between them, a channel 68 where the gripper 8 and the ribbon 10 are guided along axis X2.
  • this channel 68 is provided with a lateral slit 682 allowing a portion of a warp yarn 100 drawn by the gripper 8 to circulate along axis X2.
  • the longitudinal edges of the lateral slit 682 are formed by two chamfers 632 and 652 provided on the guide rails 63 and 65, these chamfers being divergent in a direction going away from body 62.
  • the longitudinal edges 632 and 652 of the lateral slit 682 are beveled and diverge in a direction going away from the channel 68, so that they do not risk deteriorating a yarn 100 when it moves along channel 68, together with the gripper 8.
  • ⁇ denotes the divergence angle between the longitudinal edges 632 and 652. This angle has a value between 30 and 150°, preferably between 80 and 100°, more preferably equal to 90° Longitudinal edges 632 and 652 form two longitudinal surfaces parallel to axis X8, which are more than 2mm, or more preferably more than 4mm wide.
  • a body 42 of the yarn unit 4 is made of a front portion 422 and a rear portion 424.
  • the rear portion 424 is represented on figure 4 only.
  • the front portion 422 of the body 42 defines a flat surface 426 adapted to receive a portion 102 of yarn 100 with a linear contact.
  • This surface 426 is inclined with respect to a horizontal plane. This surface 426 can also be horizontal.
  • Two clamps 43 and 45 belong to yarn unit 4.
  • the clamps 43 and 45 are represented, very schematically, on figure 1 only. In practice, they can be selected among known clamps by the designer of the drawing-in machine 2.
  • a groove 428 is made within the front portion 422 of the body 42 and extends along a longitudinal axis X4 of the yarn unit 4, which is aligned with axis X2 when the yarn unit 4 is mounted within the drawing-in machine 2.
  • This groove 428 opens toward the front of the front portion 422 and upwardly into the surface 426.
  • the groove 428 splits the flat surface 426 into two half surfaces 426A and 426B.
  • the groove 428 which has a U-shaped cross-section, forms a guiding receptacle for guiding the gripper 8 toward its first position, at the end of its movement in the forward direction F, and when it leaves its first position, at the beginning of its movement in the backward direction B.
  • the yarn unit 4 includes a proximity sensor 46 for detecting when the gripper 8 reaches its first position.
  • the gripper 8 extends along a longitudinal axis X8 between, a gripper nose 82 and a coupling end or back end 84 provided with a series of through holes 842 adapted to cooperate with corresponding engaging reliefs provided on the ribbon 10, for coupling the gripper and the ribbon.
  • a gripper nose 82 forms the forward or front end of the gripper 8
  • the holes 842 are made within the rearward or back end 84 of this gripper.
  • H8 denotes the height of the gripper 8, which is the longest dimension of the gripper perpendicular to axis X8, as shown on figure 3 .
  • Height H8 is measured along an elevation axis Z8 of the gripper, which is vertical in this embodiment.
  • W8 denotes the width of the gripper 8, which is perpendicular to axis X8 and height H8.
  • Width W8 is smaller than height H8 and measured along a transverse axis Y8.
  • a cavity 86 is provided within gripper 8 for partly accommodating a portion 102 of yarn 100.
  • This cavity 8 is formed by a notch that extends through the gripper 8, between its two lateral sides.
  • Each lateral side of the gripper 8 is parallel to axes X8 and Z8 and perpendicular to axis Y8.
  • the cavity 86 extends between the gripper nose 82 and the coupling end 84. All the edges of the cavity 86 are rounded in order to limit the risks of harming of ripping a yarn.
  • the gripper 8 has, outside of cavity 86, a main body 87 of a rectangular cross-section, with its height H8 parallel to the height of the dents 154 of the reed 150.
  • This main body 87 is located backward of the cavity 86, between this cavity 86 and the back end 84.
  • Figures 2 and 4 respectively show the two longitudinal sides of the gripper 8.
  • a bite portion 88 delimits the cavity 86. This bite portion 88 extends parallel to the longitudinal axis X8 at the rear of the gripper nose 82.
  • a ramp 83 is formed between the nose 82 and the bite portion 88. This ramp is inclined, with respect to axis X8 by an angle ⁇ between 20° and 50°, preferably between 30° and 40°, most preferably equal to 35°. The orientation of ramp 83 is such that it diverges from axis X8 toward the back end 84 of gripper 8.
  • the plane of figure 6 is longitudinal, that is slightly inclined with respect to the longitudinal sides of gripper 8. This plane is parallel to longitudinal axis X8 and inclined with respect to transverse axis Y8 through which cavity 86, extends between the two longitudinal sides of gripper 8.
  • cavity 86 has the shape of an L, with a first longitudinal branch 862 parallel to axis X8 and a second branch 864 perpendicular to axis X8.
  • the branches 862 and 864 are perpendicular to each other in the plane of figure 6 .
  • the branch 864 is parallel to axis Z8 and extends perpendicularly to axis X8, in the height direction of gripper 8, and forms a vertical branch.
  • An entry opening 866 of cavity 86 is defined between a rear tip 882 of the bite portion 88, which forms the back end of this bite portion, and a heel or shoulder 85 formed by the main body 87.
  • the entry opening 866 opens in the second branch 864 of the cavity 86.
  • a shank 89 protrudes from the main body 87 up to the nose 82 and extends parallel to axis X8. This shank defines a side of the longitudinal branch 862 of the cavity 86.
  • 892 denotes a surface of the shank 89 defining a longitudinal side of the cavity 86, at the level of the branch 862.
  • 884 denotes an interior surface of the bite portion 88 defining another longitudinal side of the cavity 86 at the level of the branch 862.
  • Surfaces 884 and 892 together delimit the branch 862 in a longitudinal direction and are parallel to axis X8, so that branch 862 has a globally constant vertical width W862, measured vertically in the longitudinal plane of the gripper, parallel to axis Z8 .
  • the gripper 8 is made of one piece. In other words, it is monobloc, so that parts 85, 87, 88 and 89 are integral.
  • ⁇ denotes an angle measured in the plane of axes X8 and Z8, that is perpendicularly to axis Y8, between axis X8 and the surface 868, within the cavity 86.
  • Angle ⁇ equals 90° in the example of the figures.
  • angle ⁇ can be chosen between 90° and 105°, while still providing the technical effect of the invention.
  • the surface 892 is opposite to and partly in register with the entry opening 866 along axis Z8.
  • L866 denotes the length of the entry opening 866, measured along axis X8.
  • L88 denotes the length of the bite portion 88 measured along axis X8.
  • the length L88 is larger than the length L866. In other words, the bite portion 88 is longer than the entry opening 866 along axis X8.
  • the axial length L866 of the entry opening 866 is preferably between 5 and 7 mm long whereas the axial length L88 of the bite portion 88 is at least 5 mm long, preferably at least 6 mm long, more preferably at least 10 mm long.
  • the axial length L88 is chosen in view of the axial length L866, in order to satisfy the relationship: L88 ⁇ L866.
  • a metallic blade or lamella 44 belongs to the yarn unit 4.
  • This metallic blade 44 is elastic, for instance made of stainless spring steel. It is obtained by laser cutting and bending of a sheet of stainless steel.
  • the metallic blade 44 extends along a longitudinal axis X44, which is parallel to axis X4 when the metallic blade 44 is secured on the body 42.
  • the metallic blade 44 includes a proximal bracket 442 and a distal arc-shaped or bended portion 444. Parts 442 and 444 respectively form the back and front ends of the metallic blade 444.
  • Two legs 445A and 445B extend rearward from the arch-shaped portion 444, toward the proximal bracket 442. These legs 445A and 445B are flat and coplanar and the arc-shaped portion 444 extends in continuation of these two legs, toward the front of the metallic blade 44.
  • the proximal bracket 442 has a T-shape and is provided with two through holes 442A and 442B where mounting screws 48 are inserted in order to secure the metallic blade 44 onto the rear portion 424 of the body 42, as shown on figure 4 where these screws 48 are represented by their respective axes.
  • the proximal bracket 442 extends perpendicularly to two branches 446A and 446B of the metallic blade 44, which respectively connect the proximal bracket 442 with the two legs 445A and 445B.
  • the two branches 446A and 446B extend on either side of a central opening 448 defined through a flat portion of the metallic blade 44, which is perpendicular to the proximal bracket 442.
  • This flat portion of the metallic blade 44 also includes legs 445A and 445B.
  • the legs 445A and 445B and the branches 446A and 446B are coplanar in a plane perpendicular to bracket 442.
  • leg 445A In the plane of parts 445A, 445B, 446A and 446B and perpendicularly to axis X44, leg 445A is wider than branch 446A; to which it is united, and leg 445B is wider that branch 446B, to which it is united.
  • the opening 448 formed between branches 446A and 446B extends, between branches 445A and 445B and up to arc-shaped portion 444, in the form of a slot 449, which is located above groove 428 when the metallic blade 44 is secured onto the body 42, as explained here-above.
  • W449 denotes the width of the slot 449 measured in a direction perpendicular to axis X44 and parallel to a straight-line joining the respective centers of the through holes 442A and 442B. Width W449 is larger than the width W8 of the gripper 8. Thus, an upper part of gripper 8 protruding upwardly, out of groove 428, in particular the bite portion 88, can slide through the slot 449 when the gripper 8 reaches its first position or when it leaves this position.
  • the metallic blade 44 also includes a globally triangular nose 443, which extends opposite to the branches 446A and 446B with respect to the arc-shaped portion 444.
  • the nose 443 has two edges 443A and 443B converging toward a tip 443C, away from the arc-shaped portion 444.
  • Y44 denotes a bending axis of arc-shaped portion 444, which is a geometrical axis around which arc-shaped portion is bent.
  • axes X44 and Y44 define an angle ⁇ between 80 and 100°.
  • angle ⁇ defined here-above which is between 80° and 100°, is also an angle between axes X2 and Y44, in a plane perpendicular to the one of figure 6 and to axis X2.
  • S445A denotes the surface of leg 445A opposite to triangular nose 443.
  • S445B denotes the surface of leg 445B opposite to triangular nose 443.
  • S446A and S446B denote the surfaces of branches 446A and 446B, which respectively extend surfaces S445A and S445B to the rear of metallic blade 44, that is toward proximal bracket 442.
  • the metallic blade 44 is also provided with a tab 447, which extends perpendicularly to the legs 445A and 445B and to the branches 446A and 446B, at the level of a forward edge of the opening 448, in a direction opposite to the arc-shaped portion 444 with respect to the plane of parts 445A, 445B, 446A and 446B.
  • tab 447 extends at the rear end of surface S445B, more specifically along a rear edge of this surface. Alternatively, it can be provided on the rear edge of surface S445A.
  • parts 443 to 449 extend in a cantilever manner with respect to the rear portion 424 of the body 42, above the flat surface 426, at a distance d4 thereof, this distance d4 being measured perpendicularly to this surface 426.
  • surfaces 445A and 446A face half-surface 426A, at distance d4, whereas surfaces 445A and 446A face half-surface 426A, also at distance d4.
  • opening 448 is in register with the proximity sensor 46.
  • opening 448 and sensor 46 are aligned in a direction perpendicular to the surface 426, so that the metallic blade 44 does not prevent the proximity sensor 46 from correctly detecting the gripper 8 when it reaches its first position.
  • the slot 449 is located above the groove 428. If the groove 428 is symmetrical with respect to the longitudinal plane of the gripper, the slot 449 is also symmetrical with respect to this plane. If the groove 428 is inclined with respect to the plane of figure 6 , the slot 449 is inclined in the same direction and located offset with respect to a median plane P44 of the metallic blade 44, perpendicular to the plane of parts 445A, 445B, 446A and 446B and equidistant from the through-holes 442A and 442B. Then, the groove is also inclined with respect to plane P44.
  • metallic blade 44 is symmetrical with respect to plane P44.
  • the tab 447 extends toward the flat surface 426, in order to constitute a stop to the movement of a yarn portion 102 along axis X2, in the forward direction, as explained hereafter.
  • the metallic blade 44 can be made in a relatively thin sheet of stainless spring steel, with a thickness of about 0,3 mm. This provides a good elasticity, so that the metallic blade 44 can be bent upwardly under an effort exerted by a yarn, for example by the passage of a stretched warp portion of yarn under the blade, in a direction going away from the flat surface 426, and immediately reach back its nominal shape when this effort disappears.
  • All edges of metallic blade 44 are preferably rounded, in order not to damage a yarn in its vicinity.
  • L445 defines the length of a leg 445, measured along axis X44, between its most forward part, which is a transition line with arch-shaped portion 444, and its rear edge. This length L445 is larger than the axial length L866 of entry opening 866.
  • the arc-shaped portion 444 has a trace centered on an axis A444 which is inclined with respect to axes X2, by a non-zero angle ⁇ .
  • Angle ⁇ is also the angle between axes A444 and X44 in the plane P44.
  • the value of angle ⁇ is chosen between 30 and 60°, preferably between 40 and 50°, more preferably equal to about 45°.
  • Non-represented sensors allow checking the position of the respective parts needed for a drawing-in process implemented on the drawing-in machine 2 throughout this process, in particular the gripper 8, the ribbon 10, the yarn 100, its portion 102, the reed 150, the heddles 160 and the drop wires 170.
  • a warp beam 200 is prepared and a yarn 100 is taken from the prepared beam and clamped by clamps 43 and 45, so that its portion 102 is presented on the drawing-in path of gripper 8, above and along the flat surface 426.
  • the position of this yarn portion 102 might not be accurately defined, even if it is stretched between the clamps 43 and 45, so that it can move a few millimeters along the drawing-in axis X2 and along metallic blade 44, as can be observed by comparing figures 4 , 5 and 6 .
  • the nose 443 can be used to guide this yarn portion 102 toward this position when the yarn 100 is coming from above or from a side of the yarn unit 4.
  • the yarn portion 102 ends up into a volume V4 defined between flat surface 426 and metallic blade 44, this volume V4 extending along axes X2 and X4, between the forward end of arc-shaped portion 444 and tab 447. Because of the shape of metallic tab 44, this volume V4 converges toward tab 447, that is toward the first position of gripper 8, in the forward direction.
  • This volume V4 is represented in dark on figures 6 , 7 and 10 .
  • the clamps maintain the yarn portion 102 in the volume V4 and apply a stretching force on the yarn portion.
  • the gripper 8 When moving forward, toward its first position, in the direction of arrows F along axis X2, the gripper 8 successively takes the positions represented on figures 1 , 4 and 6 to 9 .
  • the nose 82 of the gripper 8 slides and is guided within the groove 428, that is along the flat surface 426, so that the ramp 83 comes into contact with the yarn portion 102 received within volume V4. Because of the orientation of the ramp 83 and of the value of angle ⁇ , this ramp guides this yarn portion 102 toward the bite portion 88. During this movement, the ramp 83 urges the yarn portion 102 against the surface of metallic blade 44 oriented toward the flat surface 426, which defines the upper limit of the volume V4, on either side of the slot 449. During this movement, the gripper 8 crosses the slot 449, as visible by the comparison of figures 7 and 8 .
  • the yarn portion 102 slides along the gripper 8, on its upper edge formed by the bite portion 88, toward its back end 84.
  • the metallic blade 44 and particularly the arc-shaped portion 444 form a guiding portion for the warp yarn portion 102.
  • the yarn portion 102 is subjected to an effort resulting from its tension and/or the action of the metallic blade 44 which urges this yarn portion 102 toward the back surface 868 and the adjacent surface 892 of the shank 89.
  • the yarn portion 102 reaches the entry opening 866 of the cavity 86, so that it automatically falls within this cavity, in particular because of the its tension between the clamps 43 and 45.
  • this yarn portion 102 abuts against the shoulder 85, at the level of the back surface 868 of the cavity 86, which efficiently prevents this yarn portion 102 from further progressing toward the back end 84 of the gripper 8 during the forward movement of the gripper 8. This is due to the orientation of this back surface 868 with respect to X8, in particular the value of angle ⁇ .
  • portion 102 of yarn 100 is pushed by the back surface 868 of the cavity 86 to the front, up to when the yarn gripper 8 reaches its first position represented on figure 9 .
  • the value of angle ⁇ guarantees that the yarn portion 102 does not accidentally escape from the cavity 86 during this further forward movement.
  • the complementarity of the materials of the yarn portion 102 and the back surface 868 and the inherent friction conditions, when they are in contact during the forward motion of the gripper 8, are satisfactory.
  • this complementarity and these friction conditions to facilitate holding of the yarn portion 102 along the back surface 868 within the gripper cavity 86.
  • transfer of the yarn portion 102 into the cavity 86 occurs within a transfer zone Z4, located between the front edge of the body 42 and the proximity sensor 46, while this yarn portion 102 is maintained within the volume V4 by the metallic blade 44. Transfer of the yarn portion occurs when the yarn portion falls into the cavity 86 through the opening 866.
  • the groove 428 guides the gripper 8 in particular in the transfer zone Z4.
  • d8 denotes the vertical projection, in the plane of axes X8 and Z8, of a distance between one of surfaces S445A and S445B, on the one side, and surface 892, on the other side.
  • Distance d8 is chosen equal to, or smaller than, width W862.
  • the nose 82 reaches a position located in front of the arc-shaped portion 444 of the metallic blade 44, in other words a position located beyond the arc-shaped portion 44 with respect to the forward direction F of the gripper.
  • the back surface 868 of the cavity 86 also reaches a position located in front of this arc-shaped portion and the gripper nose 82 reaches a position beyond the tab 447.
  • the leg 445A of the metallic blade 44 extends along the longitudinal side of the gripper 8 visible on figure 2 , at the level of its cavity 86 along axes X2, X4, X8 and X44.
  • the back surface 868 of the cavity 86 has reached the metallic blade 44 along the drawing-path and prevents the yarn portion 102 to move backward out of the cavity.
  • the leg 445B extends along the longitudinal side of the gripper 8 visible on figure 6 , at the same level.
  • the bite portion 88 is located beyond the tab 447 along axis X2, in the forward direction F, and the surfaces S445A and S445B of the legs 445A and 445B are oriented toward the yarn portion 102 received in the cavity 86. They prevent this yarn portion 102 from exiting this cavity through the entry opening 866.
  • the surfaces S445A and S445B close the volume V4 in a direction going away from the flat surface 426, that is upwardly, on both longitudinal sides of the entry opening 866.
  • the closing surfaces secure the yarn portion in the yarn-receiving cavity in the transfer zone Z4.
  • the yarn portion is secured, blocked, locked, maintained, contained, retained, hold, kept, safeguarded or clamped in the cavity 86 of the gripper 8 by the metallic blade 44, so that the yarn portion cannot exit from the cavity through the opening 866 in the transfer zone Z4.
  • the closing surfaces S445A and S445B are located on the two longitudinal sides of the gripper 8. This means that the closing surfaces S445A and S445B are situated at relative small distance of the gripper with respect to an axis parallel to axis Y8 or in the vicinity of the gripper lateral sides.
  • the possible contact of the closing surfaces on the yarn portion 102 improve the positioning of the yarn and the locking of its portion 102 within the cavity 86.
  • the looseness of the stretched yarn does not permit the yarn to exit the cavity 86 of the gripper after the yarn has been transferred into the cavity, as long as the closing surfaces S445A and S445B are on the sides of the gripper.
  • the closing surfaces S445A and S445B are close by, alongside, next to, at the side of or beside the gripper 8 at least when the gripper is in the first position.
  • the metallic blade 44 forms a closing member and particularly the surfaces S445A and S445B form closing surfaces of the closing member for the warp yarn portion.
  • branches 446A and 446B are designed to close the opening 866 and prevent the exit movement of the yarn through the cavity opening in first position.
  • surfaces S446A and S446B also form closing surfaces for cavity 86.
  • the metallic blade 44 fulfills a closing function for closing upwardly the yarn-receiving cavity 86 at the level of the volume V4 aligned with the cavity 86, in register with the entry opening 866 and on both longitudinal sides of the gripper 8, when the gripper is in its first position represented on figure 9 .
  • gripper 8 starts a backward movement along axis X2, as represented by arrow B on figures 9 , 10 and 11 . Because of this movement, the yarn portion 102 moves freely within the cavity 86 from the vicinity of the back surface 868 toward a dead end 862A of the branch 862 defining the yarn-receiving cavity, opposite to the back surface 868, so that the yarn portion is neither squeezed nor harmed, but secured in the cavity. As a result, and as visible on figure 10 , the bite portion 88 efficiently holds the yarn portion 102 within the cavity 86 and the yarn portion is trapped within the cavity but not compressed.
  • the gripper 8 When leaving the first position, as shown in the configuration of figures 10 and 11 , the gripper 8 escapes from the action of the metallic blade 44. Thus, the metallic blade 44 does not close anymore upwardly the volume V4, at the level of the entry opening 866, on the longitudinal sides of the gripper 8. This is not a problem since, at that time, the yarn portion 102 is already blocked at the level of the dead end 862A of the longitudinal branch 862 of the cavity 86.
  • the metallic blade 44 cooperates with the gripper 8 only when this gripper is in the transfer zone Z4 and this represent a small percentage of the total length of the drawing in path along axis X2.
  • the length of the transfer zone Z4 along axis X2 is at most 10% of the total length of the drawing-in path along axis X2, between the first and second positions of the gripper.
  • one of the clamps 43 or 45 can be released and the gripper 8 can follow the drawing-in path, along axis X2, from the first position of figure 9 to an intermediate position of figure 2 and up to the fully retracted position of its path.
  • the gripper 8 draws the yarn 100 successively through eyelets 172 and 162 and through one of the reed gaps 152.
  • the yarn portion 102 exits from the cavity 86 with non-represented guiding means in the retracted position, before processing another drawing-in cycle with another warp yarn 100.
  • gripper 8 When travelling within channel 68, gripper 8 does not risk to damage the yarn 100, even if this yarn is heavy or bouclé, because of the beveled orientation of edges 632 and 652.
  • the nose 82 pushes this yarn portion 102 under the metallic blade 44, along axis X2 and within the volume V4 into the transfer zone Z4, up to the position of figure 13 , where the yarn portion 102 abuts against the tab 447.
  • the tab 447 forms a stop to the displacement of this portion 102, along axis X2, in the forward direction F.
  • the gripper 8 and the yarn portion 102 together exert onto the metallic blade 44 an effort, which results in an elastic deformation of this blade represented by arrows A2 and A3 on figure 13 , in a direction of separation of the arc-shaped portion 444 from the flat surface 426.
  • the metallic blade 44 takes a flexed shape and deforms in a direction opposite to the entry opening 866 of the yarn-receiving cavity 86.
  • the gripper 8 continues its forward movement toward its first position, going further than the tab 447, the yarn portion 102 remains blocked along axis X2 by the tab 447 and this yarn portion is forced by the tab 447 to move along the bite portion 88 toward its tip 882 and toward the entry opening 866.
  • the portion 102 is urged toward the flat surface 426 by the metallic blade 44, which tends to take back its nominal shape, as represented by arrows A4 and A5 on figure 14 .
  • metallic blade 44 starts to close the volume V4 on both sides of the gripper 8, when the further forward movement of the gripper 8 brings it to its first position represented on figure 9 .
  • the metallic blade 44 takes a flexed shape under the effort exerted by the yarn 100 and reaches back its nominal shape when the yarn portion 102 is received in the cavity 86.
  • Figures 13 and 14 represent alternative steps of the drawing-in process and guarantee that the yarn portion 102 is pushed into the cavity 86 by the metallic blade 44, even if the yarn portion 102 does not slide along the ramp 83 when the gripper is moving in the forward direction F, between the positions of figures 6 and 7 .
  • the steps represented on figures 13 and 14 take place, between the steps represented on figures 6 and 9 , instead of the step represented on figures 7 and 8 .
  • the steps represented on figures 9 to 11 take place.
  • the tab 447 forms a stop that limits a movement of the yarn portion 102 in the forward direction F, before the yarn portion 102 is guided into the yarn-receiving cavity 86.
  • the tab 447 limits a movement of the yarn 100 in the forward direction after the yarn portion 102 has been guided into the yarn receiving cavity 86. This may occur if, in the first position, the yarn portion 102 received within the cavity 86 moves away from the back surface 868.
  • the metallic blade 44 can be made of two separate blade parts 44A and 44B, including each a proximal bracket 442, with a through hole 442A or 442B, a distal arc-shaped portion 444, a leg 445A or 445B and a branch 446A or 446B joining parts 442 and 445A or 442 and 445B.
  • Surfaces S445A, S445B, S446A and S446B are defined as in the first embodiment.
  • This embodiment does not include a nose similar to nose 443 of the first embodiment and the slot 449 opens upwardly, at the end of the arc-shaped portion 444 opposed to legs 445A and 445B.
  • this metallic blades is made as the one of the first embodiment and works in the same way, within a non-further represented drawing-in machine.
  • the drawing-in machine 2 of the invention and the drawing-in process implemented with this machine are particularly suited for heavy or bouclé yarns, for tapes and for ribbons whose width is smaller than, or more or less the same as, the entry opening dimension L866, and since they guarantee efficient transferring of the yarn material within the cavity 86 of the gripper 8 with little risk of damaging this yarn material.
  • the metallic blade 44 can participate in guiding the yarn portion 102 into the cavity entry opening 866 and toward the back surface 868, with flexibility.
  • the metallic blade 44 keeps the yarn portion 102 within the cavity 86 by closing the volume V4 on both longitudinal sides of the gripper 8 at the level of the cavity entry opening 866.
  • the metallic blade 44 helps in maintaining and securing the yarn 100 within the cavity 86 during the end of the forward movement of the gripper 8 toward its first position, in this first position and at the beginning of the backward movement of the gripper.
  • the tab 447 is used as a stop, as explained in conjunction with figures 13 and 14 , the metallic blade 44 participates in stopping the yarn 100 along the drawing-in path, in the forward direction, before it is transferred into the cavity 86.
  • the geometry of the gripper 8 allows it to efficiently guide the yarn portion 102 along its ramp 83 and its bite portion 88, up to the entry opening 866.
  • the geometry and the orientation of the back surface 868 helps confining the yarn in the cavity 86 and hinders an accidental yarn release at the end of the forward movement of the gripper 8.
  • the well-defined geometry of this back surface 868 guarantees an accurate positioning of the yarn portion 102 along the longitudinal axis X8 of the gripper 8, during the forward movement in the direction of arrow F.
  • the geometry of the cavity 86 helps guiding the yarn portion 102 into its branch 862, between the two parallel surfaces 884 and 892 of the bite portion 88 and the shank 89. This contributes to maintaining the yarn portion 102 in the cavity 86 during the backward movement of the gripper, toward its second position, through the harness elements 170, 160 and 150.
  • An efficient drawing-in process can be implemented, without harpooning, ripping or missing a warp yarn and without mixing two yarns together. Because of the simple structure of the gripper 8, no synchronization between two moving parts must be implemented and the drawing-in machine 2 can work at higher speed than the ones of the prior art, while the thickness of the warp yarns to be drawn-in can be increased with respect to the known techniques. Moreover, different yarns or yarns with different thicknesses can be mixed in successive drawing-in operations.
  • the gripper 8 and the metallic blade 44 are economic, simple and light. They do not need any energy input or control in order to work efficiently. With the machine and the process of the invention weaving preparation can be performed semi-automatically. The drawing-in steps are realized automatically, as explained here-above, but the heddle and drop wire selection, the yarn separation and the reed displacement can be made either manually or automatically.
  • the body 42 does not form a yarn support.
  • the yarn unit 4 only includes a gripper guide for guiding the gripper 8 and positioning means similar to clamps 43 and 45.
  • the metallic blade 44 can be provided with two tabs 447, on either side of the plane P44.
  • Alternative guiding means like pneumatic, hydraulic or electronic active means can be secured to the yarn unit 4 and replace the metallic blade 44 in order to guide the yarn portion 102 into the cavity 86 of the gripper 8.
  • the ribbon 10 can be replaced by other means for driving the gripper 8 along axis X2, in particular a rod.
  • the part of the drive means incorporated within drawing-in station 6 can be an engine with transmission means for transforming the rotary motion of its output shaft into a linear motion.
  • the invention is represented when the drawing-in path goes through three different elements 150, 160 and 170 of a weaving harness.
  • the number of weaving harness elements can be different, depending on the configuration of the weaving loom to be equipped.
  • the invention is represented when the metallic blade 44 has a closing surface S445A or S445B on both longitudinal sides of the gripper 8 in the first position. However, it is possible that this metallic blade has one closing surface on one longitudinal side only of this gripper.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
  • Looms (AREA)

Claims (18)

  1. Einziehgreifer (8) zum Einziehen von Kettfäden (100) einer Kette (200) in Elemente (150, 160, 170) eines Webgeschirrs entlang eines Einziehwegs (X2), wobei sich der Greifer längs gerichtet entlang einer Hauptachse (X8) zwischen einer Greifernase (82) und einem koppelnden hinteren Ende (84) erstreckt, um den Greifer mit einem linearen Antrieb (6, 10) zu koppeln, wobei der Greifer einen garnaufnehmenden Hohlraum (86) definiert, der sich zwischen der Greifernase und dem koppelnden hinteren Ende durch den Greifer entlang einer Querachse (Y8) senkrecht zur Hauptachse erstreckt, wobei der Greifer einen Beißabschnitt (88) bildet, der sich längs gerichtet an der Hinterseite der Greifernase erstreckt, und wobei eine Eintrittsöffnung (866) des garnaufnehmenden Hohlraums zwischen einer hinteren Spitze (882) des Beißabschnitt und einer geradlinigen hinteren Fläche (868) des garnaufnehmenden Hohlraums definiert ist, dadurch gekennzeichnet, dass:
    - in einer längs gerichteten Ebene (X8, Z8) senkrecht zur Querachse (Y8) der garnaufnehmende Hohlraum (86) L-förmig ist, und
    - ein Winkel (β), definiert zwischen der Hauptachse (X8) und der geradlinigen hinteren Fläche (868) und gemessen in der längs gerichteten Ebene und innerhalb des garnaufnehmenden Hohlraums (86) zwischen 90° und 105°, vorzugsweise gleich 90° ist.
  2. Einziehgreifer nach Anspruch 1, dadurch gekennzeichnet, dass entlang der Hauptachse (X8) der Beißabschnitt (88) mindestens so lang wie die Eintrittsöffnung (866) des garnaufnehmenden Hohlraums (86) ist.
  3. Einziehgreifer nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass sich der Beißabschnitt (88) längs gerichtet parallel zur Hauptachse (X8) erstreckt, und dadurch, dass der Beißabschnitt eine Innenfläche (884) aufweist, die sich zwischen der Greifernase (82) und der hinteren Spitze (882) des Beißabschnitts erstreckt, der den garnaufnehmenden Hohlraum (86) begrenzt, und der parallel zur Hauptachse ist.
  4. Einziehmaschine (2) zum Einziehen von Kettfäden (100) einer Kette (200) in Elemente (150, 160, 170) eines Webgeschirrs entlang eines Einziehwegs (X2), wobei die Einziehmaschine Folgendes beinhaltet:
    - einen Einziehgreifer (8),
    - eine Einziehstation (6), wobei die Einziehstation Teil eines linearen Antriebs (6, 10) ist, um den Einziehgreifer entlang des Einziehwegs in einer Rückwärtsrichtung (B) zwischen einer ersten Position (Fig. 9) und einer zweiten Position und auch in einer Vorwärtsrichtung (F) zwischen der zweiten Position und der ersten Position anzutreiben,
    - eine Garneinheit (4), darin eingeschlossen Garnpositionierungsmittel (42, 43, 45), um einen Abschnitt (102) eines Garns zu positionieren, der in einen Transferbereich (Z4) eingezogen werden soll, der sich auf dem Einziehweg nahe der ersten Position befindet,
    dadurch gekennzeichnet, dass:
    - der Einziehgreifer (8) gemäß einem der Ansprüche 1 bis 3 ist; und
    - die Garneinheit (4) ein Verschlusselement (44) beinhaltet, das mit mindestens einer Verschlussfläche (S445A, S445B) ausgestattet ist, die sich auf mindestens einer längs gerichteten Seite des Greifers befindet, zumindest wenn sich der Greifer in der ersten Position befindet, wobei diese Verschlussflächen hin zur einem Garnabschnitt (102) ausgerichtet sind, der im garnaufnehmenden Hohlraum (86) aufgenommen ist, und entworfen, um eine Austrittsbewegung des Garnabschnitts aus dem garnaufnehmenden Hohlraum und durch die Eingangsöffnung (866) zu verhindern, zumindest wenn sich der Greifer in der ersten Position befindet.
  5. Einziehmaschine nach Anspruch 4, dadurch gekennzeichnet, dass zumindest wenn sich der Greifer (8) in der ersten Position befindet, sich die Verschlussflächen (S445A, S445B) des Verschlusselements (44) in einem Abstand (d8) von einer längs gerichteten Fläche (892) des Greifers erstrecken, der den garnaufnehmenden Hohlraum (86) begrenzt, und sich gegenüber seiner Eintrittsöffnung (866) befindet, wobei dieser Abstand gleich wie oder kleiner als eine Breite (W862) des garnaufnehmenden Hohlraums (86), gemessen im Hohlraum zwischen dieser längs gerichteten Fläche (892), und einer längs gerichteten Fläche (884) des Beißabschnitts (88), ist.
  6. Einziehmaschine nach einem der Ansprüche 4 und 5, dadurch gekennzeichnet, dass das Verschlusselement (44) einen Führungsabschnitt (444) beinhaltet, der sich in der Verlängerung der Verschlussflächen (S445A, S445B) hin zur Vorderseite des Verschlusselements erstreckt, und dadurch, dass dieser Führungsabschnitt hin zur Greifernase (82) in der Vorwärtsrichtung (F) konvergiert, zumindest wenn sich der Greifer (8) in der ersten Position befindet.
  7. Einziehmaschine nach Anspruch 6, dadurch gekennzeichnet, dass entlang einer Achse (X4), parallel zur Hauptachse (X8) des Greifers (8), die Verschlussflächen (S445A, S445B) des Verschlusselements (44) mindestens so lang (L445) wie die Eintrittsöffnung (866) des garnaufnehmenden Hohlraums (86) des Greifers (8) sind, und dadurch, dass dieser Führungsabschnitt (444) um eine Biegeachse (Y44) gebogen ist, die mit einer Längsachse (X2) des Einziehwegs (X2) einen Winkel (γ) zwischen 80° und 100° bildet.
  8. Einziehmaschine nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, dass die Garneinheit (4) ein Garnstützelement (42) beinhaltet, das eine Nut (428) beinhaltet, die sich entlang des Einziehwegs (X2) erstreckt, um den Greifer (8) im Transferbereich (Z4) zu führen, und dadurch, dass das Verschlusselement (44) an das Garnstützelement gesichert ist.
  9. Einziehmaschine nach einem der Ansprüche 4 bis 8, dadurch gekennzeichnet, dass die Garneinheit (4) mit einem Stopp (447) ausgestattet ist, der sich senkrecht zum Einziehweg (X2) an einem hinteren Ende mindestens einer der Verschlussflächen (S445A, S445B) entlang des Einziehwegs erstreckt, der konfiguriert ist, um eine Bewegung des Garnabschnitts (102) in der Vorwärtsrichtung (F) zu stoppen, wobei dieser Stopp vorzugsweise einstückig mit dem Verschlusselement (44) hergestellt ist.
  10. Einziehmaschine nach Anspruch 9, dadurch gekennzeichnet, dass der lineare Antrieb (6, 10) konfiguriert ist, um den Greifer (8) entlang des Einziehwegs (X2) in der Vorwärtsrichtung (F) anzutreiben, so dass der Beißabschnitt (88) des Greifers eine Position erreicht, die sich jenseits des Stopps (447) der Garneinheit (4) in der Vorwärtsrichtung befindet.
  11. Einziehmaschine nach einem der Ansprüche 4 bis 10, dadurch gekennzeichnet, dass das Verschlusselement (44) mit einem Schlitz (449) ausgestattet ist, der auf dem Einziehweg (X2) zentriert ist, wobei dieser Schlitz zwei Verschlussflächen (S445A, S445B) des Verschlusselements (44) trennt und vorzugsweise eine Breite (W449) aufweist, die groß genug ist, um vom Greifer (8) gequert zu werden, der sich in der Vorwärtsrichtung (F) oder in der Rückwärtsrichtung (B) nahe dem oder durch den Transferbereich (Z4) bewegt.
  12. Einziehmaschine nach einem der Ansprüche 4 bis 11, dadurch gekennzeichnet, dass die Einziehstation (6) einen Kanal (68) beinhaltet, der eine Führung für den Greifer (8) bildet, dadurch, dass dieser Kanal mit einem seitlichen Schlitz (682) ausgestattet ist, und dadurch, dass die zwei längs gerichteten Kanten (632, 652) dieses Schlitzes abgeschrägt sind und in eine Richtung weg vom Kanal divergieren.
  13. Einziehmaschine nach einem der Ansprüche 4 bis 12, dadurch gekennzeichnet, dass das Verschlusselement (44) mit dem Garnabschnitt (102) im Transferbereich (Z4) zusammenarbeitet, und dadurch, dass die Länge des Transferbereichs entlang des Einziehwegs (X2) höchstens 10 % der Länge des gesamten Einziehwegs des Greifers (8) zwischen der ersten und zweiten Position darstellt.
  14. Verfahren zum Einziehen von Kettgarnen in Elemente (150, 160, 170) eines Webgeschirrs entlang eines Einziehwegs (X2), der auf einer Einziehmaschine implementiert ist, der Folgendes beinhaltet:
    - einen Einziehgreifer (8),
    - eine Einziehstation (6), die zu einem linearen Antrieb (6, 10) gehört, um den Einziehgreifer entlang des Einziehwegs in einer Rückwärtsrichtung (B) zwischen einer ersten Position (Fig. 9) und einer zweiten Position und auch in einer Vorwärtsrichtung (F) zwischen der zweiten Position und der ersten Position anzutreiben,
    - eine Garneinheit (4), darin eingeschlossen Garnpositionierungsmittel (42, 43, 45), um einen Abschnitt (102) eines Garns zu positionieren, der in einen Transferbereich (Z4) eingezogen werden soll, der sich auf dem Einziehweg nahe der ersten Position befindet,
    wobei das Verfahren mindestens die folgenden Schritte beinhaltet, bestehend aus:
    a) einem Positionierungsabschnitt (102) eines Garns, der in einen Transferbereich (Z4) eingezogen werden soll;
    b) Transferieren des Garnabschnitts ist einen garnaufnehmenden Hohlraum (86) des Garngreifers (8);
    dadurch gekennzeichnet, dass das Verfahren mindestens einen Schritt beinhaltet, der nach Schritt b) implementiert ist, zumindest wenn sich der Greifer in der ersten Position befindet und bestehend aus:
    c) Sichern des Garnabschnitts (102) im garnaufnehmenden Hohlraum (86) durch Verhindern, wenn ein Verschlusselement (44) an die Garneinheit gesichert ist, einer Austrittsbewegung des Garnabschnitts aus dem garnaufnehmenden Hohlraum durch die Eintrittsöffnung (866).
  15. Verfahren nach Anspruch 14, dadurch gekennzeichnet, dass, wenn sich der Greifer (8) in der Vorwärtsrichtung (F) nach Schritt b) bewegt, eine hintere Fläche (868) des Greifers (8), die den garnaufnehmenden Hohlraum definiert, den Garnabschnitt in die Vorwärtsrichtung schiebt.
  16. Verfahren nach Anspruch 15, dadurch gekennzeichnet, dass Schritt c) implementiert wird, wenn die hintere Fläche (868) des garnaufnehmenden Hohlraums das Verschlusselement (44) entlang dem Einziehweg nahe der ersten Position (Fig. 9) erreicht.
  17. Verfahren nach einem der Ansprüche 14 bis 16, dadurch gekennzeichnet, dass vor Schritt b) der Garnabschnitt (102) vom Greifer (8) geschoben wird und eine Verschiebung des Garnabschnitts in der Vorwärtsrichtung (F) durch ein Stoppelement (447) begrenzt ist.
  18. Verfahren nach einem der Ansprüche 14 bis 17, dadurch gekennzeichnet, dass, das Verschlusselement (44) flexibel ist und zwischen einer nominalen Form und einer gebogenen Form verformbar (A2, A3, A4, A5) ist, wobei dieses Verschlusselement vorzugsweise die Form einer metallischen Klinge aufweist, und dadurch, dass sich das Verschlusselement, während Schritt b) von einer gebogenen Form in seine nominale Form biegt.
EP19190024.0A 2019-08-05 2019-08-05 Einziehgreifer, einziehmaschine mit solch einem greifer und verfahren zum einziehen von kettfäden auf solch einer einziehmaschine Active EP3772549B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19190024.0A EP3772549B1 (de) 2019-08-05 2019-08-05 Einziehgreifer, einziehmaschine mit solch einem greifer und verfahren zum einziehen von kettfäden auf solch einer einziehmaschine
CN202010779678.XA CN112323229B (zh) 2019-08-05 2020-08-05 穿经梭夹，穿经机以及穿引经纱的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19190024.0A EP3772549B1 (de) 2019-08-05 2019-08-05 Einziehgreifer, einziehmaschine mit solch einem greifer und verfahren zum einziehen von kettfäden auf solch einer einziehmaschine

Publications (2)

Publication Number Publication Date
EP3772549A1 EP3772549A1 (de) 2021-02-10
EP3772549B1 true EP3772549B1 (de) 2023-07-12

Family

ID=67544126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19190024.0A Active EP3772549B1 (de) 2019-08-05 2019-08-05 Einziehgreifer, einziehmaschine mit solch einem greifer und verfahren zum einziehen von kettfäden auf solch einer einziehmaschine

Country Status (2)

Country Link
EP (1) EP3772549B1 (de)
CN (1) CN112323229B (de)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1352332A (en) * 1970-02-03 1974-05-08 Wool Ind Res Assoc Production of woven structures
CH680076A5 (en) * 1989-12-22 1992-06-15 Zellweger Uster Ag Assembly to draw warp yarns into harness sections of loom - comprises oscillating warp drawing-in unit of flexible strip carrying gripper with interrupted channel guide
CH679598A5 (de) 1989-12-22 1992-03-13 Zellweger Uster Ag
CH690783A5 (de) * 1995-12-21 2001-01-15 Staeubli Ag Zweigwerk Sargans Verfahren und Vorrichtung zum Einziehen von Kettfäden.
EP2199443B1 (de) 2008-12-19 2016-03-16 Stäubli AG Pfäffikon Mobile Einzieheinheit
CN204417772U (zh) * 2014-11-19 2015-06-24 深圳市海弘装备技术有限公司 一种穿经机上用于出料导杆的定位夹持翻转卸料装置
CN205205391U (zh) * 2015-11-30 2016-05-04 浙江日发纺织机械股份有限公司 一种纱线夹紧及剪断装置
CN109930292B (zh) * 2019-03-21 2024-03-15 诸暨市捷速尔纺织机械有限公司 用于自动穿综机的剑钩驱动装置

Also Published As

Publication number Publication date
CN112323229A (zh) 2021-02-05
EP3772549A1 (de) 2021-02-10
CN112323229B (zh) 2023-08-01

Similar Documents

Publication Publication Date Title
US7810526B2 (en) Insert rapier
US5184380A (en) Method and apparatus for singularizing healds for warp thread drawing-in machine
US5413151A (en) Gripper loom rapier guide arrangement
EP3772549B1 (de) Einziehgreifer, einziehmaschine mit solch einem greifer und verfahren zum einziehen von kettfäden auf solch einer einziehmaschine
US20090293983A1 (en) Apparatus And Method For The Insertion Of A Weft Thread In A Rapier Weaving Machine
EP0259915A1 (de) Verfahren zum Reparieren eines Kettfadenreissens in Webmaschinen und dabei benutzte Vorrichtung zum Wiedereinfädeln
DE3016192A1 (de) Elektronischer schussfadenwaechter an einer webmaschine mit greiferschuetzen
EP0134377B1 (de) Vorrichtung zum Einschlagen der Schussfadenenden bei einer Webmachine
RU2028394C1 (ru) Устройство для проборки нитей основы в галева ремиз ткацкого станка
JP2021123841A (ja) 製織方法、そのような方法を実施するよこ糸選択装置、及びそのようなよこ糸選択装置を組み込んだ織機
JPS61282457A (ja) ひ無織機において担持部材上に交換自在に配設される案内部材の固着装置
US5819812A (en) Giver gripper for a gripper loom
JPS63105148A (ja) 糸緊張装置
USRE35400E (en) Rapier loom having picking tapes and spacers
CN113060600A (zh) 张力保持机构及穿经机
US20030201026A1 (en) Catching and holding apparatus for the catching-side weft thread end in a weaving machine
EP1985732A1 (de) Vorrichtung zur Übergabe von Tuftinggarnen
EP1394302B1 (de) Verbesserungen an Schussfadengreifern für Webmaschinen und an Webmaschinen mit Führungsmitteln dafür
US5441085A (en) Warp thread insertion device for series-shed looms
CN113950544B (zh) 用于操作综框元件的装置和方法
JP3440851B2 (ja) 緯糸挿入方法および装置
JPH04228638A (ja) ドロツパーのドローイングイン装置
US4076052A (en) System for transferring a yarn from one part of a textile machine to another part
GB2058853A (en) Weft inserting device for shuttleless loom
US3088497A (en) Filling carrier for shuttleless looms

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20210712

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20230208

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230509

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602019032434

Country of ref document: DE

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: TR

Payment date: 20230802

Year of fee payment: 5

Ref country code: IT

Payment date: 20230921

Year of fee payment: 5

Ref country code: CH

Payment date: 20230903

Year of fee payment: 5

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20230712

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20230829

Year of fee payment: 5

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1587209

Country of ref document: AT

Kind code of ref document: T

Effective date: 20230712

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230712

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231013

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230712

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231112

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230712

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230712

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231113

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231012

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230712

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230712

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231112

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230712

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231013

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230712

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230712

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230712

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230712

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602019032434

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230805

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230712

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230712

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230805

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230712

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230712

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230712

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230712

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230712

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20230831

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

26N No opposition filed

Effective date: 20240415

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20231012