EP1662029A2 - Antriebsverfahren für die Bewegungsteile für die Plüschhenkelbildung in einer Frottierwebmaschine mit bewegbarem Tuch - Google Patents

Antriebsverfahren für die Bewegungsteile für die Plüschhenkelbildung in einer Frottierwebmaschine mit bewegbarem Tuch Download PDF

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Publication number
EP1662029A2
EP1662029A2 EP05025225A EP05025225A EP1662029A2 EP 1662029 A2 EP1662029 A2 EP 1662029A2 EP 05025225 A EP05025225 A EP 05025225A EP 05025225 A EP05025225 A EP 05025225A EP 1662029 A2 EP1662029 A2 EP 1662029A2
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EP
European Patent Office
Prior art keywords
driving
pile loom
cloth
pile
terry motion
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Withdrawn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
EP05025225A
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English (en)
French (fr)
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EP1662029A3 (de
Inventor
Hideki Banba
Akihiko Yamamoto
Hiroshi Kakuda
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.)
Tsudakoma Corp
Original Assignee
Tsudakoma Industrial Co Ltd
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 Tsudakoma Industrial Co Ltd filed Critical Tsudakoma Industrial Co Ltd
Publication of EP1662029A2 publication Critical patent/EP1662029A2/de
Publication of EP1662029A3 publication Critical patent/EP1662029A3/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D39/00—Pile-fabric looms
    • D03D39/22—Terry looms
    • D03D39/223—Cloth control

Definitions

  • the present invention relates to methods for driving terry motion members, and particularly, to a method for driving at least one of let-off-side and take-up side terry motion members in a cloth-shifting-type pile loom with designated driving means.
  • activation period refers to a period extending from a point at which the pile loom is activated to a point at which the rotational speed of the pile loom reaches a steady rotational speed.
  • Japanese Unexamined Patent Application Publication No. 2-47334 discloses a cloth-shifting-type pile loom in which a back roller defining a let-off-side terry motion member and a breast beam defining a take-up-side terry motion member are driven by single driving means or are driven individually by a plurality of designated driving means.
  • the single driving means or the plurality of designated driving means is independent of a main driving motor of the pile loom and may be, for example, a driving motor or driving motors.
  • Such a difference in pile heights may be caused by a low rotational speed of the pile loom during the activation period.
  • the shifting rate of a reed driven by the main shaft of the pile loom is also low in the activation period.
  • an inertia force acting upon, for example, a driving mechanism of the reed during a beating motion of the reed i.e. a force acting in a reverse direction of the shifting direction of the reed
  • the bending amount of the reed itself in the activation period are lower than those in the steady operation mode.
  • the most advanced position of the reed in the activation period becomes located posterior to that in the steady operation mode.
  • the second loose-pick weft yarn is not completely beaten against the first loose-pick weft yarn, such that the two weft yarns are separated from each other by a certain distance. Consequently, when a new weft yarn is shifted towards the cloth fell in the subsequent fast-pick beating operation, incomplete piles are formed since the restraining force of the pile warp yarns by the weft yarn is weak. This may result in a low height of the piles.
  • Japanese Unexamined Patent Application Publication No. 7-173743 discloses a technique for preventing the height of piles formed in the activation period from being different from the height of piles formed under steady operation.
  • the distance between the beating position and the cloth fell is adjusted by changing the shifting distance of the reed.
  • the target beating distance for the activation period of the pile loom is set different from that for the steady operation mode.
  • the shifting distance of the reed is adjusted in order to correct the height of piles formed in the activation period, or more specifically, to correct the distance between the beating position and the cloth fell for the activation period.
  • this is problematic in that the setting process for a new target beating distance is difficult.
  • the difference in pile heights between the activation period and the steady operation period is mainly caused by the inertia force generated in response to the shifting process of the reed and the bending of the reed itself. If the shifting distance of the reed is changed in order to solve this problem, the inertia force and the bending of the reed also change. This means that if the shifting distance of the reed is adjusted simply in view of the change in the pile height, the beating position will not reach its target position. As a result, the piles cannot be formed to a desired height, that is, the same height as the piles formed under steady operation. Moreover, numerous tests must be performed in order to obtain the setting value for the desired pile height.
  • the present invention provides a method for driving at least one of a let-off-side terry motion member and a take-up-side terry motion member of a cloth-shifting-type pile loom with designated driving means.
  • the method includes one of the steps of driving at least one of the let-off-side terry motion member and the take-up-side terry motion member in a first driving mode for a predetermined period using the driving means, the first driving mode being different from a second driving mode performed under a steady operation of the pile loom, the predetermined period starting from a point at which the pile loom is activated after the pile loom is stopped; and driving the driving means prior to the activation of the pile loom in the stopped state so that a cloth fell in the stopped state of the pile loom is shifted towards a let-off-side of warp yarns, and subsequently activating the pile loom.
  • each of the first and second driving modes is preferably defined by a driving distance of at least one of the let-off-side terry motion member and the take-up-side terry motion member driven by the driving means.
  • a driving operation of the driving means may be controlled in a manner such that a position of the cloth fell at the time of a loose-pick beating operation performed in an activation period of the pile loom is closer towards the let-off-side of the warp yarns than a position of the cloth fell at the time of a loose-pick beating operation performed under steady operation of the pile loom, or may be controlled in a manner such that a position of the cloth fell at the time of a fast-pick beating operation performed in the activation period of the pile loom is different from a position of the cloth fell at the time of a fast-pick beating operation performed under steady operation of the pile loom.
  • At least one of the terry motion members is driven in a mode different from the mode performed under steady operation of the pile loom. Specifically, since at least one of the terry motion members is driven so that the distance between the reed and the cloth fell at the time of a beating operation in the activation period is substantially equal to that in the steady operation mode, the height of piles formed in the activation period is prevented from being different from the height of piles formed under steady operation.
  • the driving distance of at least one of the terry motion members may be set and adjusted based on, for example, the difference in beating positions between the activation period and the steady operation period, the adjustment of the driving distance does not adversely affect the beating position, as in the conventional techniques. Accordingly, an easy setting process is achieved.
  • FIGs. 1 to 3 illustrate a first embodiment according to the present invention.
  • a pile loom 1 shown in Fig. 1 to which the present invention is applied is a cloth-shifting type which shifts the cloth fell during a pile-weaving operation in order to form a pile fabric.
  • the cloth-shifting-type pile loom 1 includes an upper pile-warp beam 2 around which a plurality of pile warp yarns 4 are wound in a sheet-like manner, and a lower ground-warp beam 3 around which a plurality of ground warp yarns 5 are wound in a sheet-like manner.
  • the pile warp yarns 4 are fed from the pile-warp beam 2 and are wound around two guide rollers 6, 6 and a pile-warp tension roller 7 disposed at a downstream side of the guide rollers 6, 6 so as to be supplied to a cloth fell 9 of cloth 8 via a heald (not shown) and a reed 10.
  • the ground warp yarns 5 are fed from the ground-warp beam 3 and are wound around a ground-warp tension roller 15, which defines a let-off-side terry motion member. Similar to the pile warp yarns 4, the ground warp yarns 5 guided by the tension roller 15 are then supplied to the cloth fell 9 of the cloth 8 via the heald and the reed 10.
  • the pile warp yarns 4 and the ground warp yarns 5 form the cloth 8.
  • the cloth 8 is subsequently guided by a cloth guide roller 16, which defines a take-up-side terry motion member, towards a take-up roller 11 and guide rollers 12, 13 so as to be finally taken up by a cloth roller 14.
  • the let-off-side terry motion member i.e. the ground-warp tension roller 15
  • the take-up-side terry motion member i.e. the cloth guide roller 16
  • driving motors such as servomotors and stepping motors, defining driving means.
  • opposite ends of the ground-warp tension roller 15 are supported by a pair of supporting levers 24 (only one of which is shown in Fig. 1).
  • the supporting levers 24 are respectively supported by opposite side frames of the pile loom 1 in a rocking manner.
  • the supporting levers 24 are linked with a rocking lever unit 22 via a linking rod 26.
  • the rocking lever unit 22 is driven in a rocking motion by a driving motor m1.
  • the driving motor m1 drives the rocking lever unit 22 in a rocking motion
  • the supporting levers 24 become rocked around a rocking shaft 24a, whereby the tension roller 15 moves in a rocking motion in a front-back direction.
  • the cloth guide roller 16 is supported between the opposite side frames of the pile loom 1 via a pair of supporting levers 34.
  • the supporting levers 34 are linked with a rocking lever unit 32 via a linking rod 36.
  • the rocking lever unit 32 is driven in a rocking motion by a driving motor m2.
  • the driving motor m2 drives the rocking lever unit 32 in a rocking motion
  • the supporting levers 34 become rocked around a rocking shaft 34a, whereby the cloth guide roller 16 moves in a rocking motion in the front-back direction.
  • the two driving motors m1, m2 are driven in the same rotational direction in synchronization with a main shaft of the pile loom 1 (i.e. a main driving motor which is not shown).
  • a main driving motor which is not shown.
  • the ground-warp tension roller 15 and the cloth guide roller 16 are rocked forward or backward at a predetermined timing in each pile formation cycle, whereby the cloth fell 9 of the cloth 8 is shifted at the predetermined timing.
  • the two terry motion members can be driven in an asynchronous manner.
  • the two terry motion members can be driven at different drive-start timings and different drive-end timings and by different driving distances.
  • the ground-warp tension roller 15 may be driven in a manner such that the fluctuation of the ground warp tension is moderate during each cycle of the pile loom 1.
  • each pile formation cycle consists of two loose-pick beating operations and one fast-pick beating operation. In other words, one pile formation cycle includes three sub-cycles.
  • the cloth guide roller 16 is driven forward or backward at a predetermined timing in each pile formation cycle, such that the cloth guide roller 16 is driven back and forth between a position F (i.e. a most retreated position) indicated by a dotted line in Fig. 2 and a position L (i.e. a most advanced position) indicated by a solid line in Fig. 2.
  • a position F i.e. a most retreated position
  • a position L i.e. a most advanced position
  • the cloth guide roller 16 is located at the position L, and in this state, the cloth fell 9 of the cloth 8 is located at a position 9L.
  • the cloth guide roller 16 is located at the position F, and in this state, the cloth fell 9 is located at a position 9F.
  • the pile warp yarns 4 between the reed 10 and the cloth fell 9 at the position 9L form the piles. Accordingly, for every loose-pick beating operation, a distance P between the position 9L of cloth fell 9 and the most advanced position of the reed 10 is directly related to the height of piles that are formed. In other words, the pile height is large when the distance P is long, whereas the pile height is small when the distance P is short.
  • Fig. 3B illustrates an example in which the activation angle is set near the end of a second sub-cycle of one pile formation cycle.
  • the cloth guide roller 16 is located at its most advanced position, that is, the position L at the time of a loose-pick beating operation.
  • the rotational speed of the pile loom 1 increases from this activation point and then reaches a steady rotational speed after a second beating operation from the activation point.
  • Fig. 3A illustrates a state in which the reed 10, whose most advanced position is normally located at a position indicated by a dashed line during the steady operation of the pile loom 1, only reaches a position indicated by a solid line during the activation period due to the low rotational speed of the pile loom 1.
  • a distance P' between the position 9L of the cloth fell 9 and the most advanced position of the reed 10 is greater than the distance P in the steady operation mode.
  • the height of piles to be formed becomes larger or smaller in comparison with the height of piles formed under steady operation.
  • the cloth guide roller 16 prior to the activation of the pile loom 1, the cloth guide roller 16 is shifted backward to a position L', and the pile loom 1 is subsequently activated in this state.
  • the shifting distance of the cloth guide roller 16 may be set based on the difference between the most advanced position of the reed 10 in the activation period and the most advanced position of the reed 10 under steady operation. Specifically, such a difference may be determined by performing, for example, test weaving.
  • a mathematical function may be preliminarily determined from the relationship between the rotational speed of the pile loom 1 and the most advanced position of the reed 10, and the shifting distance may be derived from the mathematical function based on the rotational speed of the pile loom 1 at the point of a beating operation performed in the activation period.
  • the cloth fell 9 in the activation period becomes located at a position 9L', which is posterior to the position 9L of the cloth fell 9 in the stopped state of the pile loom 1. Consequently, in the first loose-pick beating operation performed after the activation point, the most advanced position of the reed 10 and the position 9L' of the cloth fell 9 are separated from each other by a distance P'', which is substantially equal to the distance P in the steady operation mode. In this case, instead of being located at the most advanced position L, the cloth guide roller 16 during the activation period is located at the position L', which is posterior to the position L. Consequently, for the subsequent fast-pick beating operation, the shifting distance of the cloth guide roller 16 towards the position F, namely, the driving distance of the cloth guide roller 16 by the driving motor m2, is smaller than that in the steady operation.
  • the cloth guide roller 16 is driven in a manner such that the cloth guide roller 16 at the time of the fast-pick beating operation following the first loose-pick beating operation after the activation point is positioned posterior to the position of the cloth guide roller 16 at the time of a fast-pick beating operation performed under steady operation of the pile loom 1.
  • the purpose of driving the cloth guide roller 16 in this manner is to prevent the pile height from becoming smaller. Specifically, as shown in Figs. 3A and 3B, this is caused by the rotational speed of the pile loom 1 not reaching the steady rotational speed at the time of the fast-pick beating operation in the activation period, meaning that the most advanced position of the reed 10 in this fast-pick beating operation has not yet reached the most advanced position of the reed 10 for the steady operation.
  • the cloth guide roller 16 is driven by the driving motor m2 in a manner such that the cloth guide roller 16 at the time of this fast-pick beating operation of the activation period is positioned posterior to the position of the cloth guide roller 16 at the time of a fast-pick beating operation under steady operation.
  • the rotational speed of the pile loom 1 is different between the first loose-pick beating operation performed after the activation point and the fast-pick beating operation following the first loose-pick beating operation. Specifically, the rotational speed at the time of the fast-pick beating operation is higher than the rotational speed at the time of the first loose-pick beating operation.
  • the difference in the most advanced position of the reed 10 between the activation period and the steady operation period is smaller for the fast-pick beating operation, which similarly means that the difference in the position of the cloth guide roller 16 between the activation period and the steady operation period is smaller for the fast-pick beating operation.
  • the driving distance of the cloth guide roller 16 during the activation period is different from (smaller than) the driving distance of the cloth guide roller 16 under steady operation.
  • the cloth guide roller 16 defining the take-up-side terry motion member is driven by the driving motor m2 prior to the activation so that the cloth fell 9 is shifted towards the let-off-side of the warp yarns.
  • the driving distance of the cloth guide roller 16 within a predetermined period, i.e. the activation period is set different from (smaller than) the driving distance of the cloth guide roller 16 under steady operation.
  • this advantageously prevents the height of piles formed in the activation period from being different from the height of piles formed under steady operation, which is caused by the most advanced position of the reed 10 during the activation period being posterior to the most advanced position of the reed 10 under steady operation due to the pile loom 1 operating at a lower rotational speed in the activation period than in the steady operation period.
  • the quality of the cloth 8 is prevented from deteriorating.
  • the present invention is not limited to the first embodiment.
  • the ground-warp tension roller 15 defining the let-off-side terry motion member may also be driven in a similar manner.
  • the let-off-side terry motion member may be shifted towards the rear prior to the activation so that the let-off-side terry motion member in the activation period is driven by a driving distance different from the driving distance in the steady operation mode.
  • the take-up-side and the let-off-side terry motion members may each be driven in different driving modes between the activation period and the steady operation period, or only the let-off-side terry motion member may be driven in different driving modes between the activation period and the steady operation period.
  • this driving process may be omitted depending on, for example, the activation angle.
  • this driving process prior to the activation is not necessary, and therefore, only the driving distance after the activation point may be set different from the driving distance in the steady operation mode.
  • the abovementioned driving process prior to the activation may alternatively be omitted.
  • one of or each of the terry motion members may be shifted to a desired position by driving the corresponding driving motor after the activation point.
  • the rotational speed of the pile loom 1 reaches the steady rotational speed before the subsequent fast-pick beating operation, as shown in Fig.
  • the driving distance of the terry motion member driven by the driving motor between the activation point and the fast-pick beating operation is the same as the driving distance of the terry motion member under steady operation.
  • the terry motion member is driven at different drive-start timings and different driving patterns between the activation period and the steady operation period.
  • Such a driving mode is included in the scope of the present invention.
  • take-up-side terry motion member in the above embodiment is driven such that the cloth fell 9 at the time of the fast-pick beating operation performed in the activation period is positioned posterior to the position of the cloth fell 9 at the time of a fast-pick beating operation under steady operation
  • one of or each of the terry motion members may alternatively be driven such that the cloth fell 9 at the time of the fast-pick beating operation performed in the activation period is positioned in front of the position of the cloth fell 9 at the time of a fast-pick beating operation under steady operation.
  • the cloth fell 9 of the cloth 8 is pushed forward from its original position in response to a beating force generated by the beating motion. Due to a repulsive force of the cloth fell 9, the cloth fell 9 returns to its original position simultaneously with a retreating motion of the reed 10.
  • the repulsive force of the cloth fell 9 pushed forward is also weak.
  • the position of the cloth fell 9 after a fast-pick beating operation in the activation period may be located in front of the position of the cloth fell 9 located after a fast-pick beating operation performed under steady operation. This may cause the height of subsequent piles to be larger than the height of piles formed under steady operation.
  • one of or each of the terry motion members may be driven such that the position of the cloth fell 9 at the time of the fast-pick beating operation in the activation period is located in front of the position of the cloth fell 9 for a fast-pick beating operation under steady operation and that the most advanced position of the reed 10 is located posterior to the position of the cloth fell 9.
  • predetermined period refers to the activation period, that is, a period extending from the activation point of the pile loom 1 to a point at which the rotational speed of the pile loom 1 reaches the steady rotational speed
  • predetermined period is not limited to the activation period, and may alternatively be directed to any desired period, such as a period extending between the point at which the rotational speed of the pile loom 1 reaches the steady rotational speed and a point at which one or more picks are woven.
  • the take-up side terry motion member (cloth guide roller 16) is driven such that the cloth fell 9 at the time of the fast-pick beating operation in the activation period is positioned posterior to the position of the cloth fell 9 for a fast-pick beating operation under steady operation.
  • This is intended to prevent the height of piles formed in the activation period from becoming smaller, which is caused by the most advanced position of the reed 10 at the time of the fast-pick beating operation in the activation period being posterior to the most advanced position of the reed 10 for a fast-pick beating operation under steady operation.
  • Figs. 5A and 5B illustrate an alternative embodiment to the first embodiment.
  • the cloth fell 9 at the time of the fast-pick beating operation in the activation period may be located at the same position as in the steady operation mode.
  • one of or each of the terry motion members may be driven such that the cloth fell 9 at the time of the first loose-pick beating operation performed after the rotational speed of the pile loom 1 reaches the steady rotational speed is positioned posterior to the usual position of the cloth fell 9 in the steady operation mode.
  • the position of the cloth fell 9 may at times be unstable shortly after the activation period even when the rotational speed of the pile loom 1 has reached the steady rotational speed. If such unstableness can be found preliminarily by test weaving, the position of the cloth fell 9 may be adjusted for several picks after the point at which the rotational speed has reached the steady rotational speed by driving one of or each of the terry motion members by, for example, a driving distance different from the usual driving distance in the steady operation mode.
  • the pile loom 1 to which the present invention is applied is a type in which the let-off-side terry motion member and the take-up-side terry motion member are driven individually by the designated driving means (driving motors) independent of the main driving motor of the pile loom 1.
  • the present invention is not necessarily limited to this type of a pile loom, and may alternatively be directed to a type in which the two terry motion members are driven with a single driving motor (for example, the pile loom disclosed in Fig. 9 of Japanese Unexamined Patent Application Publication No. 2-47334).
  • the let-off-side and the take-up-side terry motion members are both driven by the designated driving means
  • at least one of the let-off-side and the take-up-side terry motion members may be driven by the designated driving means.
  • the terry motion member that is driven in different driving modes between the activation period and the steady operation period must be driven by the designated driving means.
  • the designated driving means is defined by one or more driving motors, such as servomotors and stepping motors
  • the driving means according to the present invention may alternatively be, for example, one or more rotary actuators, such as rotary solenoids.
  • the driving means may be one or more direct-acting actuators, such as linear motors.
  • the driving distance for the driving process of one of or each of the terry motion members performed prior to the activation and the driving distance during the activation period may be set in view of the stretched condition of the warp yarns. For example, these driving distances may be set in accordance with a period of time in which the pile loom 1 is stopped.
  • the warp tension may be loosened in the stopped state of the pile loom 1. This can be achieved by applying a known technique in which the warp beams are rotated forward and/or the cloth roller is rotated backward when the pile loom 1 is stopped.
  • the let-off-side terry motion member and/or the take-up-side terry motion member may be driven towards each other when the pile loom 1 is stopped so as to effectively utilize the characteristic of the present invention in that at least one of the let-off-side terry motion member and the take-up-side terry motion member can be driven by the designated driving means. Accordingly, the warp tension can be loosened.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP05025225A 2004-11-25 2005-11-18 Antriebsverfahren für die Bewegungsteile für die Plüschhenkelbildung in einer Frottierwebmaschine mit bewegbarem Tuch Withdrawn EP1662029A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004340486A JP2006152455A (ja) 2004-11-25 2004-11-25 布移動式パイル織機におけるテリーモーション部材の駆動制御方法

Publications (2)

Publication Number Publication Date
EP1662029A2 true EP1662029A2 (de) 2006-05-31
EP1662029A3 EP1662029A3 (de) 2007-08-01

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EP05025225A Withdrawn EP1662029A3 (de) 2004-11-25 2005-11-18 Antriebsverfahren für die Bewegungsteile für die Plüschhenkelbildung in einer Frottierwebmaschine mit bewegbarem Tuch

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EP (1) EP1662029A3 (de)
JP (1) JP2006152455A (de)
CN (1) CN1782152A (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0247334A (ja) 1988-07-08 1990-02-16 Gebr Sulzer Ag テリー織機を運転する方法及びテリー織機
JPH07173743A (ja) 1993-10-14 1995-07-11 Sulzer Rueti Ag 織機における筬打ち制御方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5392817A (en) * 1991-06-11 1995-02-28 Sulzer Brothers Limited Apparatus for altering the loop length of terry cloth
JPH10317254A (ja) * 1997-05-14 1998-12-02 Toyota Autom Loom Works Ltd パイル織機における緯糸認識装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0247334A (ja) 1988-07-08 1990-02-16 Gebr Sulzer Ag テリー織機を運転する方法及びテリー織機
JPH07173743A (ja) 1993-10-14 1995-07-11 Sulzer Rueti Ag 織機における筬打ち制御方法

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EP1662029A3 (de) 2007-08-01
CN1782152A (zh) 2006-06-07
JP2006152455A (ja) 2006-06-15

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