EP2184389B1 - Procédé d'insertion de trame et dispositif d'insertion de trame d'une machine à tisser à lances - Google Patents

Procédé d'insertion de trame et dispositif d'insertion de trame d'une machine à tisser à lances Download PDF

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Publication number
EP2184389B1
EP2184389B1 EP20090013498 EP09013498A EP2184389B1 EP 2184389 B1 EP2184389 B1 EP 2184389B1 EP 20090013498 EP20090013498 EP 20090013498 EP 09013498 A EP09013498 A EP 09013498A EP 2184389 B1 EP2184389 B1 EP 2184389B1
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EP
European Patent Office
Prior art keywords
weft
guide
guide lever
lever
weft insertion
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.)
Not-in-force
Application number
EP20090013498
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German (de)
English (en)
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EP2184389A1 (fr
Inventor
Hidetomo Yoneda
Magoshiro Higashi
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Tsudakoma Corp
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Tsudakoma Industrial Co Ltd
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Publication of EP2184389A1 publication Critical patent/EP2184389A1/fr
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Publication of EP2184389B1 publication Critical patent/EP2184389B1/fr
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/38—Weft pattern mechanisms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means

Definitions

  • the present invention relates to a weft insertion method and a weft insertion device for preventing a weft from being damaged in a weft insertion process of a rapier loom.
  • a weft to be inserted next is guided to a position (hereinafter, also referred to as "catchable position") at which a rapier head (insert rapier) can catch the weft.
  • the weft connected to a selvage of a woven fabric at a weft-supply side intersects with a running path of the rapier head at the catchable position.
  • the rapier head catches the weft at the catchable position when the rapier head is advanced for weft insertion, carries the weft into a shed of warps, and thus performs the weft insertion.
  • a reed starts its advancement (beating-up motion) toward a cloth fell, and the inserted weft is beaten up by the reed to the cloth fell.
  • Japanese Unexamined Patent Application Publication No. 9-217248 discloses a rapier loom including a selection device which inserts a weft selectively supplied from one of at least two weft-supply members.
  • the selection device includes at least two selection bars as weft guide members to guide the weft let off from the corresponding weft-supply member to a catchable position of a rapier head.
  • Each selection bar has a guide hole at a tip end part of the selection bar. A weft is inserted through the guide hole.
  • the selection bar is driven by a rotary solenoid to be advanced and retracted between two positions including a selection position, at which the weft is guided to the rapier head at the catchable position of the rapier head, and a retreat position, at which the weft is held at a position that the rapier head cannot catch the weft.
  • a guide hole through which a weft is inserted is constant in a warp direction.
  • the selection bars are advanced and retracted substantially vertically (in up-down direction).
  • the position of the guide hole is substantially constant in a substantially horizontal warp direction.
  • the guide hole has to guide the weft at a side farther from a cloth fell than a running path of the rapier head (i.e., closer to a let-off side of the warp than the cloth fell).
  • the weft In the state where the weft is catchable, the weft is let off from the weft-supply member, extends across the-running path of the rapier head through the guide hole of the selection bar, and is connected to the cloth fell of a woven fabric.
  • the guide hole guides the weft at the position father from the cloth fell than the running path of the rapier head, the weft is guided in a bending manner toward the cloth fell at the position of the guide hole. Also, the weft located within the shed of the warps engages with (contacts) a weft-supply side end part of the reed, and bends toward the position far from the cloth fell at the engagement position. After the weft insertion, the weft in the shed of the warps is carried toward the cloth fell by the beating-up motion of the reed. As the reed moves closer to the cloth fell, bending degrees of the weft at the two positions (the position of the guide hole, the position of the weft-supply side end part of the reed) increase.
  • the weft contacts an inner peripheral surface of the guide hole and the weft-supply side end part of the reed and slides thereon while the weft receives large resistances because of bending at the two bending positions. Therefore, the weft may be damaged, resulting in the weft being fluffed. In some cases yarn breakage may occur. The weft located close to the guide hole may remain in the shed of the warps at the next weft insertion. Hence, if the weft at that part is fluffed, the quality of a woven fabric may be degraded. If the yarn breakage occurs, the weft cannot be used for a next weft insertion. The loom has to be stopped and recovered.
  • the flat weft when a flat yarn such as a yarn made of carbon fiber is used as a weft, the flat weft may be pressed in a width direction and deformed by being bent at the end part of the reed, and the deformation may affect the part of the weft located within the shed of the warps.
  • the part of the weft close to the selvage at the weft-supply side may have a smaller width than the other part. Consequently, the woven fabric to be produced may be defective in quality.
  • WO 2008/009332 shows a weft guide mechanism comprising a weft supply member acting as a presenting element and cooperating with a moveable feeder which can move between a rest position and a working position in order to grip the weft thread between a stop and the presenting element and to move it into an acceptance position for the gripper and comprising at least one fixed guiding device which is provided between the stop line and the presenting element, wherein the weft thread can be removed from the rest position into the working position on the guiding device during the movement of the presenting element with the result that the weft thread is supported by the feeder during gripping.
  • an object of the present invention is, in a rapier loom, to markedly reduce bending of a weft or sliding of the weft on a reed etc. occurring because of a positional relationship between the reed and a weft guide member which causes a selected weft to be arranged at a position, at which a rapier head can catch the weft, and prevent the weft from being damaged because of bending and sliding.
  • the present invention provides a weft insertion device.
  • a weft insertion device In a rapier loom including the weft insertion device, to insert a weft through a guide hole at a tip end part of a weft guide lever (weft guide member) and guide the weft connected to a woven fabric to a catchable position at which a rapier head can catch the weft, the weft guide lever can reciprocate between a first position and a second position, the first position being a retreat position closer to a cloth fell, the second position being a guide position closer to a running path of the rapier head.
  • the guide hole of the weft guide lever is moved toward the second position, so that the weft is guided at the catchable position of the rapier head.
  • the weft guide lever is driven in a direction of an advancement motion of a reed to move the guide hole toward the first position, so that bending of the warp and sliding of the warp on the reed etc. occurring because of a positional relationship between the weft guide lever and the reed, are markedly reduced, and the weft is prevented from being damaged because of bending and sliding of the weft.
  • the expression “beating up” does not represent an advancement motion of the reed toward the cloth fell, but represents a motion of beating up a weft to the cloth fell.
  • the expression “beating-up motion” represents the advancement motion of the reed to carry the weft to the cloth fell.
  • a weft insertion method of a rapier loom includes a weft insertion device.
  • the weft insertion device includes a weft guide mechanism.
  • the weft guide mechanism includes a weft guide lever having a guide hole at a tip end part of the weft guide lever, a weft being inserted through the guide hole.
  • the weft guide mechanism guides the weft connected to a woven fabric to a catchable position, at which a rapier head is capable of catching the weft.
  • the weft guide mechanism is capable of causing the weft guide lever to reciprocate to selectively locate the guide hole between a first position and a second position, the first position being a retreat position closer to a cloth fell than a running path of the rapier head in a warp direction, the second position being a position farther from the cloth fell than the first position in the warp direction, the second position being also a guide position closer to the running path of the rapier head than the cloth fell.
  • the method includes the step of driving the weft guide lever to move such that the guide hole, which is arranged at the second position at start of weft insertion, moves toward the first position before a reed performs beating up.
  • a weft insertion device of a rapier loom includes a weft guide mechanism.
  • the weft guide mechanism includes a weft guide lever having a guide hole at a tip end part of the weft guide lever, a weft being inserted through the guide hole; and a drive mechanism driving the weft guide lever.
  • the weft guide mechanism guides the weft connected to a woven fabric to a catchable position at which a rapier head is capable of catching the weft.
  • the drive mechanism causes the weft guide lever to reciprocate to selectively locate the guide hole between a first position and a second position, the first position being a retreat position closer to a cloth fell than a running path of the rapier head in a warp direction, the second position being a position farther from the cloth fell than the first position in the warp direction, the second position being also a guide position closer to the running path of the rapier head than the cloth fell, the drive mechanism also driving the weft guide lever such that the guide hole arranged at the second position starts moving toward the first position before a reed performs beating up.
  • the operation mode of the weft guide lever may be determined such that a relative positional relationship between the reed and the guide hole is within a weaving allowable range.
  • the drive mechanism drives the weft guide lever with the operation mode.
  • the operation mode of the weft guide lever is a start timing and/or a movement speed at which the weft guide lever starts the movement to move the guide hole from the second position toward the first position.
  • the weaving allowable range of the relative positional relationship is an allowable range relating to weaving in view of the relative positional relationship between the reed and the guide hole in the warp direction.
  • the range of the relative positional relationship between both components allows a woven cloth with a desired quality to be woven. The details will be given below.
  • an operation timing of the reed is basically constant.
  • the relative positional relationship between the reed and the guide hole varies depending on the operation mode of the weft guide lever.
  • the relationship between a weft insertion period and a beating-up motion is constant.
  • the above-mentioned relative positional relationship can represent the relationship between the weft insertion period and the position of the guide hole.
  • the weft and warp may be damaged and the quality of a woven cloth to be produced may be affected. For example, example cases will be described as follows.
  • sliding between the weft and the warp in the weft insertion direction i.e., setting the operation mode of the weft guide lever such that the relative distance between the reed and the guide hole causes sliding
  • sliding with a certain degree may be allowable, or sliding may not affect the quality of the woven cloth.
  • bending of the weft at the weft-supply side end part of the reed at the as a result of the increase in the relative distance between the guide hole and the reed while the guide hole is farther from the cloth fell than the reed may be allowable with a certain degree in view of the quality of the woven cloth.
  • the relative positional relationship between the guide hole and the reed the relationship which is variable in relation to the beating-up motion of the reed, the effect of the relative positional relationship to the quality of a woven cloth may be taken into account, and the operation mode of the weft guide lever may be determined such that the relative positional relationship falls within a range in which the level of effect satisfies the desired quality of the woven cloth.
  • This range is the above-described weaving allowable range.
  • the relative positional relationship between the reed and the guide hole corresponds to not only the distance (relative distance) between the reed and the guide hole, but also a timing at which the reed and the guide hole have a certain positional relationship.
  • the movement of the weft guide lever toward the first position may be started when the rapier head is exited from a shed of warps or later, before beating up of the rapier head is performed.
  • the drive mechanism may start driving the weft guide lever in a period from when the rapier head is exited from the shed of the warps or later until beating up of the reed is performed.
  • the weft insertion mechanism may further include a second guide lever in addition to the weft guide lever, which serves as a first guide lever, the second guide lever being farther from the cloth fell than the first guide lever and guiding the weft to the catchable position of the rapier head in cooperation with the first guide lever.
  • the second guide lever may be driven to reciprocate between a third position as a retreat position and a fourth position as a guide position at the start of the weft insertion.
  • the weft insertion mechanism may include a second drive mechanism for driving the second guide lever between the third and fourth positions, in addition to the drive mechanism, which serves as a first drive mechanism for driving the first guide lever between the first and second positions.
  • the second guide lever which guides the weft at the fourth position at the start of the weft insertion, is moved toward the third position as the retreat position when the rapier head catches the weft or later.
  • the second drive mechanism may perform the movement of the second guide lever.
  • the aspects of the present invention mainly use multi-color weft insertion; however, the present invention can be applied to weft insertion of a single color.
  • the weft guide mechanism guides selected one of a plurality of wefts to the catchable position (second position).
  • the weft guide mechanism drives the weft guide lever, the guide hole of which is located at the second position at the start of the weft insertion, to move the guide hole toward the first position before the reed performs beating up.
  • the weft guide mechanism is configured such that the guide hole arranged at the second position at the start of the weft insertion is moved toward the first position in the warp direction by the movement operation of the guide lever.
  • an angle defined by the weft located between the warp array and the weft guide lever and the weft in the shed of the warps in the warp direction during the beating-up motion of the reed can be decreased as compared with related art. Consequently, bending of the weft at the weft-supply side end part and at the guide hole can be decreased. The weft can be prevented from being damaged because of sliding of the weft on the weft-supply side end part of the reed and the guide hole.
  • the operation mode of the weft guide lever is determined such that the relative positional relationship between the reed and the guide hole in the warp direction is within the weaving allowable range, the weft and warp would not be markedly damaged because of bending of the weft and sliding of the weft and warp in the weft insertion direction. Hence, a defectively woven part does not appear.
  • the operation mode of the weft guide lever in particular, the timing, the speed, the acceleration, etc., when the guide hole is displaced from the second position to the first position are more freely determined.
  • the movement of the weft guide lever may be started when the rapier head is exited from the shed of the warps or later, that is, when the weft insertion into the shed of the warps is almost completed or later. Accordingly, after the reed starts the beating-up operation, the weft in the shed of the warps engages with the reed in a manner substantially parallel to the reed. Hence, picking of the weft to the cloth fell is stably performed.
  • the operation to arrange the weft to the catchable position may be performed by cooperation of the first guide lever (weft guide lever) and the second guide lever. Accordingly, loads of the drive mechanisms for driving the levers can be decreased, and the weft insertion can be stably performed.
  • the first position is close to the cloth fell to markedly decrease bending of the weft
  • the movement amount of the weft guide lever (first guide lever) is increased, and the load applied to the driving mechanism is increased.
  • the drive mechanism drives the weft guide lever by using a dedicated rotation drive source, it becomes difficult to follow a target operation as the speed of the loom is increased. Thus, insertion error may occur, and the error may interrupt an increase in speed of the loom.
  • weft guide mechanism is arranged to cause the weft to be arranged at the catchable position by cooperation of the two guide levers, that is, since the movement amount of the first guide lever is decreased and the second guide lever handles the residual movement of the weft to the catchable position, the loads applied to the drive mechanisms of the guide levers are decreased. Even when the loom is operated at a high speed, weft insertion can be stably performed.
  • the second guide lever which guides the weft at the fourth position at start of the weft insertion, toward the third position (standby position) when the rapier head catches the weft or later, the weft can be prevented from rubbing on the weft-supply side end part of the reed during the weft insertion.
  • the weft has to be guided to intersect with the running path of the rapier head.
  • the second guide lever which guides the weft at the catchable position, may guide the weft at the position farther from the cloth fell than the running position of the rapier head during the weft insertion.
  • the running path of the rapier head is arranged at a position close to the reed in the warp direction. Accordingly, the guide position of the second guide lever is located at the position farther from the cloth fell than the front surface of the reed.
  • the weft is hence let off while rubbing on the weft-supply side end part of the reed during the weft insertion. Consequently, the weft may be fluffed, and the quality of the woven fabric to be produced may be degraded.
  • the weft is the flat yarn as described above, the yarn may be twisted, resulting in a defective of the woven fabric.
  • the second guide lever which guides the weft at the position farther from the cloth fell than the running path of the rapier head at the start of the weft insertion, may be moved to be restored to the standby position when the rapier head catches the weft or later. Accordingly, the guide position of the weft can be a position closer to the cloth fell than the front surface of the reed. Thus, rubbing between the weft-supply side end part and the weft can be prevented during the weft insertion.
  • Figs. 1 to 4 illustrate a weft insertion device 1 of a rapier loom according to an embodiment of the present invention.
  • the rapier loom is a both-side rapier loom, in which, for example, a rapier head 7 for insertion is advanced from a weft-supply side, and a rapier head 71 for carriage is advanced from a non-weft-supply side into a shed 10 of warps 9.
  • a weft 2 is transferred from the rapier head 7 to the rapier head 71 to perform weft insertion.
  • the illustrated weft insertion device 1 of the rapier loom is an example for weft insertion of a single color, in which a single weft-supply member supplies a weft 2 and the rapier heads 7 and 71 insert the weft 2.
  • the weft 2 is, for example, a flat yarn.
  • the weft insertion device 1 includes a weft guide mechanism 5 and a drive mechanism 11.
  • the weft guide mechanism 5 guides the weft 2 connected to a salvage of a woven fabric 6 toward a catchable position of the rapier head 7.
  • the drive mechanism 11 drives the weft guide mechanism 5.
  • the weft guide mechanism 5 includes a first guide lever 31 and a second guide lever 32.
  • the first guide lever 31 is a weft guide lever 3 having a guide hole 4 at a tip end part of the weft guide lever 3.
  • the weft 2 is inserted through the guide hole 4.
  • the second guide lever 32 guides the weft 2 to the catchable position of the rapier head 7 in cooperation with the first guide lever 31.
  • the first guide lever 31 can linearly reciprocate in a warp direction, and is driven by a first drive mechanism 51 which is the drive mechanism 11.
  • the first drive mechanism 51 includes a first drive motor 21 and a rotatable lever 27.
  • the first drive mechanism 51 transmits reciprocative rotation of an output shaft 25 of the first drive motor 21 to the first guide lever 31 through the rotatable lever 27.
  • the first drive mechanism 51 drives the first guide lever 31 to selectively locate the guide hole 4 between a first position P1 and a second position P2.
  • the first position P1 is a retreat position closer to a cloth fell 8 than a running path of the rapier head 7 in the warp direction.
  • the second position P2 is a position farther from the cloth fell 8 than the first position P1 in the warp direction and serves as a guide position closer to the running path of the rapier head 7 than the cloth fell 8.
  • the first position P1 is determined such that an end part of the guide hole 4 close to a reed 12 is located close to the cloth fell 8 in the warp direction
  • the second position P2 is determined such that an intermediate part of the guide hole 4 is located on the running path of the rapier head 7.
  • the first drive mechanism 51 drives the first guide lever 31, which is arranged such that the guide hole 4 is located at the second position P2 at start of weft insertion, to start movement of the first guide lever 31 such that the guide hole 4 moves toward the first position P1 before the reed 12 performs beating up.
  • a drive mode of the first drive mechanism 51 is determined such that the movement of the first guide lever 31 is started after the weft insertion of the weft 2 into the shad 10 of the warps 9 is completed.
  • the movement of the first guide lever 31 is started after the beating-up motion of the reed 12 is started after the rapier heads 7 and 71 are exited from the shed 10, and when the reed 12 reaches the second position P2 in the warp direction and the reed 12 engages with the inserted weft 2.
  • the first guide lever 31 has a movement speed corresponding to a movement speed of the reed 12.
  • an operation mode of the first guide lever 31, as the weft guide lever 3 of this embodiment is determined such that the movement is started after the movement of the beating-up motion of the reed 12 is started, and that the first guide lever 31 is moved with the reed 12 in a state where the position of the first guide lever 31 correspond to the position of the reed 12 in the warp direction.
  • the second guide lever 32 is driven to swing in a reciprocating manner in the warp direction.
  • the second guide lever 32 is driven by a second drive mechanism 52.
  • the second drive mechanism 52 causes swinging movement in a reciprocating manner of the second guide lever 32 by reciprocative rotation of an output shaft 26 of a second drive motor 22.
  • the second guide lever 32 is driven to reciprocate between a third position P3 and a fourth position P4.
  • the third position P3 is a retreat position.
  • the fourth position P4 is a position at the start of the weft insertion and serves as a guide position at which the second guide lever 32 guides the weft 2 at a position farther from the cloth fell 8 than a front surface of the reed 12 in the warp direction.
  • the second guide lever 32 engages with the weft 2 guided to the guide hole 4 of the first guide lever 31 at the second position P2, and guides the weft 2 to the catchable position of the rapier head 7 at the fourth position P4.
  • the third position P3 is a position achieved when the second guide lever 32 swings toward the cloth fell 8 from the fourth position P4.
  • the second guide lever 32 does not engage with the weft 2 which moves toward the cloth fell 8 by the beating-up motion of the reed 12.
  • the second guide lever 32 located at the fourth position P4 at the start of the weft insertion is moved toward the third position P3 as the retreat position when the rapier head 7 catches the weft 2 or later.
  • the second drive motor 22 drives the second guide lever 32 to retract the second guide lever 32 from the fourth position P4 toward the third position p3 at a predetermined timing when the rapier head 7 catches the weft 2 or later.
  • the first guide lever 31 includes a main body, which is a rod-like member with a circular cross section, and a guide member 13 attached to a tip end of the main body.
  • the guide member 13 guides the weft 2.
  • the guide member 13 is formed of a plate member, and has the rectangular guide hole 4 which guides a flat yarn as the weft 2. Before the weft insertion, the weft 2 let off from a weft-supply member (not shown) is passing through the guide hole 4 at the first position P1 and is being connected to a salvage of the woven fabric 6.
  • the first guide lever 31 is supported movably substantially in parallel to a warp line by a guide hole of a guide member 16 which is attached to a first support bracket 14 with an attachment bolt 15.
  • the guide member 16 is attached to a surface of the first support bracket 14 close to the woven fabric 6.
  • Two guide members 16 are provided to guide the first guide lever 31 at two positions in a sliding manner.
  • the first support bracket 14 is adjustably attached to an L-shaped bracket 23 through a long hole 17 and an adjustment bolt 19.
  • the L-shaped bracket 23 is adjustably attached to a base bracket 24 through a long hole 18 and an adjustment bolt 20.
  • the first support bracket 14 is attached in an adjustable manner in a height direction and the warp direction.
  • the first drive mechanism 51 includes the rotatable lever 27 which couples the output shaft 25 of the first drive motor 21 with the first guide lever 31, an engagement pin 29 attached to the first guide lever 31, and a roller 30 which is rotatably held by the engagement pin 29 and engages with an engagement groove 28 of the rotatable lever 27, in addition to the first drive motor 21 and the guide member 16.
  • the first drive mechanism 51 drives the weft guide lever 3 to reciprocate, by swinging movement of the rotatable lever 27 because of the reciprocative rotation of the output shaft 25 of the first drive motor 21.
  • the first drive motor 21 is supported by the first support bracket 14 while the direction of the output shaft 25 is parallel to the weft insertion direction.
  • An end of the rotatable lever 27 is attached and fixed to the output shaft 25 of the first drive motor 21 at a predetermined phase.
  • the rotatable lever 27 is fixed to the output shaft 25 of the first drive motor 21 by fixing with a split clamp.
  • the rotatable lever 27 can be fixed to the output shaft 25 at a desirable phase.
  • the engagement pin 29 is fixed to a rear end of the first guide lever 31.
  • the engagement pin 29 rotatably holds the spherical roller 30.
  • the roller 30 is formed such that opposite parts of spherical members are chamfered to be flat surfaces.
  • Another end of the rotatable lever 27 is split into two parts such that a pair of coupling legs faces one another.
  • the split parts define the engagement groove 28.
  • the facing surfaces of the engagement groove 28 are arcuate to fit with a spherical surface of the roller 30.
  • Fig. 1 uses a solid line to illustrate a state where the guide hole 4 is located at the second position P2 (the guide position at the weft insertion) because of the advancement of the first guide lever 31. Also, Fig. 1 uses a two-dot chain line to illustrate a state where the guide hole 4 is located at the first position P1 (retreat position) because of the retraction of the first guide lever 31.
  • the second guide lever 32 includes an attachment member 33 which is fixed to the output shaft 26 of the second drive motor 22, and a weft engagement member 34 which is fixed to the attachment member 33.
  • the weft engagement member 34 engages with the weft 2 and guides the weft 2 to the catchable position.
  • the attachment member 33 is fixed to the output shaft 26 of the second drive motor 22 by fixing with a split clamp similarly to the rotatable lever 27. Hence, the second guide lever 32 can be fixed to the output shaft 26 at a desirable phase.
  • the second drive motor 22 and the attachment member 33 define the second drive mechanism 52 which drives the second guide lever 32. That is, the attachment member 33 is a member that defines part of the second guide lever 32 and also part of the second drive mechanism 52.
  • the second drive motor 22 is attached to a second support bracket 39 through a long hole 35 and an adjustment bolt 37 such that the position of the second drive motor 22 is adjustable in the up-down direction.
  • the second support bracket 39 is attached to the base bracket 24 through a long hole 36 and an adjustment bolt 38 such that the position of the second support bracket 39 is adjustable in the warp direction. Consequently, the second drive motor 22 is attached such that the position thereof is adjustable in the height direction and the warp direction.
  • Fig. 1 uses a slid line to illustrate a state where the second guide lever 32 is located at the fourth position P4 (the guide position at which the weft 2 is guided at the catchable position at the start of the weft insertion). Also, Fig. 1 uses a two-dot chain line to illustrate a state where the second guide lever 32 is located at the third position P3 (retreat position).
  • Figs. 3A and 3B , and Figs. 4A to 4E are explanatory views showing an operation and an action of the weft insertion device 1 of the rapier loom shown in Figs. 1 and 2 .
  • Fig. 3A is a displacement diagram of the first guide lever 31.
  • Fig. 3B is a displacement diagram of the second guide lever 32.
  • the horizontal axis of both diagrams. is a rotation angle of a main shaft of the loom (crank angle of the loom).
  • the vertical axis of Fig. 3A is an operation angle (rotation angle) of the rotatable lever 27 which causes the first guide lever 31 to reciprocate, with reference the first position P1 (retreat position).
  • FIG. 3B is an operation angle (rotation angle) of the second guide lever 32 with reference to the third position P3 (retreat position).
  • Figs. 4A to 4E are explanatory diagrams showing a weft insertion operation. The operation will be described with reference to Figs. 1 , 3A, 3B etc. on the basis of the operation order shown in Figs. 4A to 4E .
  • the reed 12 After the reed 12 starts its advancement toward the cloth fell 8, the reed 12 engages with (contacts) the inserted weft 2, and thereafter, the weft 2 starts moving to the cloth fell 8 with the reed 12 because of the advancement of the reed 12.
  • the first guide lever 31 is driven toward the first position P1 in correspondence with the movement of the weft 2. Accordingly, the guide hole 4 of the first guide lever 31 moves toward the cloth fell 8 together with the weft 2.
  • the weft 2 arranged between the reed 12 and the first guide lever 31 is carried to the cloth fell 8 because of the advancement of the reed 12 while the weft 2 does not substantially bend in the warp direction at the end part of the reed 12.
  • Part of the inserted weft 2 at the non-weft-supply side is released when the weft insertion is completed because the weft catching portion of the carrier rapier head 71 releases the weft 2.
  • the weft 2 does not bend at the non-weft-supply side.
  • Part of the weft 2 at the weft-supply side is guided at a fixed position by other member or device (for example, a sensor which detects running of a yarn) in an area farther from a warp array than the first guide lever 31.
  • the weft 2 bends to be away from the warp array at the position of the first guide lever 31 because the first guide lever 31 moves, the bending amount is small because the guide position by the other member and the first guide lever 31 in the weft insertion direction and the guide position can be desirably determined.
  • the weft 2 is not damaged by the bending.
  • the movement of the first guide lever 31 toward the first position P1 after the rapier head 7 holds the weft 2 is performed such that, as the most preferred embodiment, the guide hole 4 of the first guide lever 31 moves in an advancement direction of the reed 12 in synchronization with that the weft 2 is carried by the reed 12 toward the cloth fell 8.
  • An operation start timing at which the first guide lever 31 starts moving is determined as a timing at which the weft 2 engages with the reed 12 because of the reed 12 is advanced by the beating-up motion, and the weft 2 starts moving toward the cloth fell 8 together with the reed 12 (hereinafter, also referred to as "movement start timing"). With the operation mode, bending of the weft 2 can be minimized, which is advantageous.
  • the operation mode of the first guide lever 31 is not limited thereto.
  • An operation mode of a first guide lever may be determined such that the movement of the guide hole 4 is started before or after the movement start timing of the weft 2 as long as the relative positional relationship between the reed 12 and the guide hole 4 is within the above-mentioned weaving allowable range.
  • the operation mode can be any of the following modes.
  • the first guide lever 31 may perform the operation (movement to the retreat position) performed by the second guide lever 32 after the rapier head 7 catches the weft 2 in the above-described embodiment.
  • the operation of the first guide lever 31 at this time does not provide movement to the retreat position (first position P1).
  • the first guide lever 31 is temporarily stopped at the second position P2 (intermediate position) of the above-described embodiment, and then the movement to the first position P1 is started in synchronization with the beating-up motion.
  • a load to be applied to the drive mechanism may increase because of an increase in speed of the loom. Owing to this, in the case of motor drive type, the weft guide lever 3 (first guide lever 31) may not follow a target operation. In the case of mechanical drive type, the drive mechanism may be damaged. Therefore, a preferred embodiment may be the above-described embodiment, in which the weft 2 is guided by cooperation of the two guide levers (first guide lever 31 and second guide lever 32).
  • the present invention is not limited to a both-side rapier loom as the embodiment, and may be applied to a one-side rapier loom in which weft insertion is performed such that a single rapier head runs from the weft-supply side to the non-weft-supply side.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Claims (8)

  1. Procédé d'insertion de trame d'une machine à tisser à lances, la machine à tisser à lances comprenant un dispositif d'insertion de trame (1), le dispositif d'insertion de trame (1) comprenant un mécanisme de guidage de trame (5), le mécanisme de guidage de trame (5) comprenant un premier levier de guidage (31) possédant un trou de guidage (4) dans une partie d'extrémité de pointe du premier levier de guidage (31), une trame (2) acheminée par un organe d'acheminement de trame étant insérée dans le trou de guidage (4), le mécanisme de guidage de trame (5) guidant la trame (2) reliée à un tissu non tissé (6) jusqu'à une position attrapable, dans laquelle une tête de lance (7) peut attraper la trame (2),
    dans lequel le mécanisme de guidage de trame (5) peut amener le premier levier de guidage (31) à effectuer un mouvement de va-et-vient pour placer sélectivement le trou de guidage (4) entre une première position (P1) et une deuxième position (P2), la première position (P1) étant une position de retrait plus proche de la ligne de serrage de duite (8) qu'un chemin de déplacement de la tête de lance (7) dans un sens de chaîne, la deuxième position (P2) étant une position plus éloignée de la ligne de serrage de duite (8) que la première position (P1) dans le sens de la chaîne, la deuxième position (P2) étant également une position de guidage plus proche du chemin de déplacement de la tête de lance (7) que la ligne de serrage de duite (8), et le mécanisme de guidage de trame (5) comprend en outre un second levier de guidage (32) plus éloigné de la ligne de serrage de duite (8) que le premier levier de guidage (31) et guidant la trame (2) jusqu'à la position attrapable de la tête de lance (7) en coopération avec le premier levier de guidage (31), le second levier de guidage (32) étant entraîné pour effectuer un mouvement de va-et-vient entre une troisième position (P3) qui est une position de retrait et une quatrième position (P4) qui est une position de guidage au début de l'insertion de trame,
    le procédé comprenant l'étape consistant à entraîner le déplacement du premier levier de guidage (31) de sorte que le trou de guidage (4), qui est agencé dans la deuxième position (P2) au début de l'insertion de trame, se déplace vers la première position (P1) avant qu'un peigne (12) n'effectue une frappe.
  2. Procédé d'insertion de trame de la machine à tisser à lances selon la revendication 1, dans lequel un mode de fonctionnement du premier levier de guidage (31) est un moment de démarrage auquel le premier levier de guidage (31) commence le déplacement et/ou une vitesse de déplacement à laquelle le premier levier de guidage (31) se déplace, pour déplacer le trou de guidage de la deuxième position vers la première position et est déterminé de sorte qu'une relation positionnelle relative entre le peigne (12) et le trou de guidage (4) dans le sens de la chaîne se trouve dans une plage de tissage admissible.
  3. Procédé d'insertion de trame de la machine à tisser à lances selon la revendication 1 ou 2, dans lequel le déplacement du premier levier de guidage (31) vers la première position (P1) commence lorsque la tête de lance (7) quitte une foule (10) de chaînes (9) ou après.
  4. Procédé d'insertion de trame de la machine à tisser à lances selon la revendication 1, dans lequel le second levier de guidage (32), qui guide la trame (2) à la quatrième position (P4) au début de l'insertion de trame, est déplacé vers la troisième position (P3) servant de position de retrait lorsque la tête de lance (7) attrape la trame (2) ou après.
  5. Dispositif d'insertion de trame (1) d'une machine à tisser à lances, comprenant :
    un mécanisme de guidage de trame (5),
    dans lequel le mécanisme de guidage de trame (5) comprend
    un premier levier de guidage (31) comportant un trou de guidage (4) dans une partie d'extrémité de pointe du premier levier de guidage (31), une trame (2) acheminée par un organe d'acheminement de trame étant insérée dans le trou de guidage (4) ; et
    un premier mécanisme d'entraînement (51) entraînant le premier levier de guidage (31),
    dans lequel le mécanisme de guidage de trame (5) guide la trame (2) reliée à un tissu non tissé (6) jusqu'à une position attrapable, dans laquelle une tête de lance (7) peut attraper la trame (2), et
    dans lequel le premier mécanisme d'entraînement (51) amène le premier levier de guidage (31) à effectuer un mouvement de va-et-vient pour placer sélectivement le trou de guidage (4) entre une première position (P1) et une deuxième position (P2), la première position (P1) étant une position de retrait plus proche de la ligne de serrage de duite (8) qu'un chemin de déplacement de la tête de lance (7) dans un sens de chaîne, la deuxième position (P2) étant une position plus éloignée de la ligne de serrage de duite (8) que la première position (P1) dans le sens de la chaîne, la deuxième position (P2) étant également une position de guidage plus proche du chemin de déplacement de la tête de lance (7) que la ligne de serrage de duite (8), le mécanisme d'entraînement (11) entraînant également le premier levier de guidage (31) de sorte que le trou de guidage (4), dans la deuxième position (P2), commence à se déplacer vers la première position (P1) avant qu'un peigne (12) n'effectue une frappe, et
    un second levier de guidage (32) plus éloigné de la ligne de serrage de duite (8) que le premier levier de guidage (31) et guidant la trame (2) jusqu'à la position attrapable, dans laquelle la tête de lance (7) peut attraper la trame (2) en coopération avec le premier levier de guidage (31), et
    un second mécanisme d'entraînement (52) amenant le second levier de guidage (32) effectuer un mouvement de va-et-vient entre une troisième position (P3) servant de position de retrait et une quatrième position (P4) qui est une position de guidage sélectionnée au début de l'insertion de trame.
  6. Dispositif d'insertion de trame (1) de la machine à tisser à lances selon la revendication 5, dans lequel le premier mécanisme d'entraînement (51) entraîne le levier de guidage de trame (3) avec un mode de fonctionnement qui est un moment de démarrage auquel le premier levier de guidage (31) commence le déplacement et/ou une vitesse de déplacement à laquelle le premier levier de guidage (31) se déplace, pour déplacer le trou de guidage de la deuxième position (P2) vers la première position (P1) et est déterminé de sorte qu'une relation positionnelle relative entre le peigne (12) et le trou de guidage (4) dans le sens de la chaîne se trouve dans une plage de tissage admissible.
  7. Dispositif d'insertion de trame (1) de la machine à tisser à lances selon la revendication 5 ou 6, dans lequel le premier mécanisme d'entraînement (51) amène le premier levier de guidage (31) à commencer à se déplacer vers la première position (P1) lorsque la tête de lance (7) quitte une foule (10) de chaînes (9) ou après.
  8. Dispositif d'insertion de trame (1) de la machine à tisser à lances selon la revendication 5, dans lequel le second mécanisme d'entraînement (52) amène le second levier de guidage (32), qui guide la trame (2) à la quatrième position (P4) au début de l'insertion de trame, à se déplacer vers la troisième position (P3) qui sert de position de retrait lorsque la tête de lance (7) attrape la trame (2) ou après.
EP20090013498 2008-11-07 2009-10-26 Procédé d'insertion de trame et dispositif d'insertion de trame d'une machine à tisser à lances Not-in-force EP2184389B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008286347A JP5731098B2 (ja) 2008-11-07 2008-11-07 レピア織機の緯入れ方法及びその装置

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EP2184389A1 EP2184389A1 (fr) 2010-05-12
EP2184389B1 true EP2184389B1 (fr) 2012-12-05

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Country Link
EP (1) EP2184389B1 (fr)
JP (1) JP5731098B2 (fr)
CN (1) CN101736493B (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE1650986A1 (en) * 2016-07-06 2018-01-07 Iro Ab Weft yarn feeding arrangement with motor drive

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5153335Y2 (fr) * 1971-09-25 1976-12-20
JPS5522578B2 (fr) * 1971-11-19 1980-06-18
NL8600857A (nl) * 1986-04-03 1987-11-02 Picanol Nv Werkwijze voor het klemmen, vasthouden en presenteren van inslagdraden bij grijperweefmachines en inrichting hiertoe aangewend.
KR940009396A (ko) * 1992-10-02 1994-05-20 고시바 헤이지 다색용 레피아 직기에 있어서의 불량위사 분리장치
JPH09217248A (ja) 1996-02-08 1997-08-19 Toyota Autom Loom Works Ltd 織機における緯糸選択装置
JPH09268453A (ja) * 1996-03-27 1997-10-14 Toyota Autom Loom Works Ltd 織機における緯糸選択装置
IT1303764B1 (it) * 1998-11-17 2001-02-23 S M I T S R L Societa Macchine Pinza di condotti per telai senza navetta particolarmente adatta perl'introduzione contemporanea di piu' trame nella bocca di ordito
DE10349645A1 (de) * 2003-10-21 2005-06-02 Picanol N.V. Verfahren zum Auswählen und Zustellen von Schussfäden und Greiferwebmaschine mit einer Vorrichtung zum Auswählen und Zustellen von Schussfäden
DE10349644A1 (de) * 2003-10-21 2005-06-02 Picanol N.V. Vorrichtung zum Auswählen und Zustellen von Schussfäden zu einem Greifer einer Greiferwebmaschine
DE102006034262A1 (de) * 2006-07-18 2008-01-24 Picanol N.V. Vorrichtung zum Zustellen von Schussfäden für eine Webmaschine

Also Published As

Publication number Publication date
JP2010111973A (ja) 2010-05-20
CN101736493A (zh) 2010-06-16
EP2184389A1 (fr) 2010-05-12
JP5731098B2 (ja) 2015-06-10
CN101736493B (zh) 2013-03-13

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