EP2278052B1 - Dispositif d'entraînement pour un cadre de lisses d'un métier à tisser - Google Patents

Dispositif d'entraînement pour un cadre de lisses d'un métier à tisser Download PDF

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Publication number
EP2278052B1
EP2278052B1 EP20090165912 EP09165912A EP2278052B1 EP 2278052 B1 EP2278052 B1 EP 2278052B1 EP 20090165912 EP20090165912 EP 20090165912 EP 09165912 A EP09165912 A EP 09165912A EP 2278052 B1 EP2278052 B1 EP 2278052B1
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EP
European Patent Office
Prior art keywords
movement
heald frame
weft insertion
heald
weaving machine
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Not-in-force
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EP20090165912
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German (de)
English (en)
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EP2278052A1 (fr
EP2278052A8 (fr
Inventor
Ulrich Deierlein
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Groz Beckert KG
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Groz Beckert KG
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Priority to EP20090165912 priority Critical patent/EP2278052B1/fr
Publication of EP2278052A1 publication Critical patent/EP2278052A1/fr
Publication of EP2278052A8 publication Critical patent/EP2278052A8/fr
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C5/00—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices
    • D03C5/02—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices operated by rotating cams
    • D03C5/04—Construction or shape of cams
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C5/00—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices
    • D03C5/005—Leveling mechanisms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C5/00—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices
    • D03C5/02—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices operated by rotating cams

Definitions

  • the invention relates to a shaft drive for a heald of a loom.
  • a shaft drive is for example from the EP 1 975 292 A1 out.
  • the shaft drive is designed there as an eccentric cam with cams, wherein a voltage applied to the cam follower is connected to the weaving shank of the loom. According to the contour of the cam, the course of movement of the heald shaft is predetermined.
  • the cam described there has four consecutive sectors, wherein two of the sectors specify a tray change movement from the first to the second open position or vice versa. Between lying lying in each case a cam sector is present, which causes a pendulum motion without rest in the region of the respective open position.
  • the DE 27 44 795 C2 and DE 36 23 016 C1 relate to weaving machines for double-pile weaving with a pile thread.
  • the sheds forming the shed for the upper fabric are continuously moved up and down in their respective positions with a predetermined stroke.
  • the weft insertion for the upper fabric takes place at the level of the lower tissue.
  • the healds for the lower tissue do not perform such a lifting movement, but take a detent position.
  • a detent position of the heald frames for the upper fabric is not provided in contrast.
  • the movement WebMfte for the upper fabric results from the superposition of the lifting movement with a basic movement.
  • the phase position of the stroke relative to the basic movement is adjustable.
  • JP 3987 828 B2 the possibility to combine the weaving shaft movement from predetermined partial movements and to control accordingly. From the detent position there is an abrupt transition to the subject change movement, which generates an acceleration jump and thus a very large acceleration change.
  • the course of movement of the heald shaft is predetermined so that this is transferred after reaching a first reversal point within a first open shed position in a rest section.
  • the heald is preferably caused immediately following the first reversal point to perform a first transitional movement, by which it is transferred to a detent position.
  • the position or the stroke of the heald shaft in the detent position corresponds approximately to the stroke in the first reversal point.
  • the shaft drive gives the heald a movement without a standstill or detent phase.
  • This first transition movement ensures that the change in acceleration when moving the heald from the first reversal point to the rest position does not assume amounts that are above a permissible limit value.
  • acceleration jumps are avoided by the first transition movement.
  • the heald passes through a change of direction between the two open shed positions, in which it changes its direction of movement and is moved into the detent position.
  • this direction change point it follows in a first movement phase of the first transition movement of a first course of motion preset, which is predetermined by the shaft drive.
  • the first movement phase is immediately followed by a second movement phase, which is defined by a second movement history specification that differs from the first movement history specification.
  • the second movement phase is immediately followed by the standstill of the heald frame in the rest position.
  • the heald After reaching the first turning point in the first open shed position, the heald performs a unique one Pendulum movement through the direction change point and is then transferred to the detent position. A continued pendulum movement until the next change of subject can be avoided. Unnecessary lifting movements of the heald and a resulting unnecessary energy consumption are avoided. Nevertheless, there is a smooth transition from the first turning point to the locking position of the first open shed position.
  • Each law of motion specifies a uniform and, in particular, continuous and non-disruptive function according to which the hedge is to move. This function is defined, for example, as a function of the time or the angle of rotation of the drive shaft of the shaft drive.
  • the overall movement of the heald shaft is continuously differentiable at least twice.
  • the Hubpositon the heald is dependent on the rotation angle of the drive shaft of the shaft drive of the loom to understand.
  • the movement course of a change of subject movement from the first reversal point of a first open position to the second reversal point of the other or second open position is predefined on the basis of a harmonic function, in particular a sinusoidal function.
  • the first course of motion and / or the second course of motion are also predefined on the basis of a harmonic function.
  • the duration of a tray change movement from the first reversal point of an open shed position to the second reversal point of the respective other shed refractive position corresponds to the period duration of a weft insertion period from one weft insertion to the next weft insertion.
  • the tray change movement may begin during a weft insertion and end during the subsequent weft insertion.
  • the tray exchange movement coincide exactly with the start or end points of the weft insertion periods P. Decisive is only that the weft entries can take place without interference. This is the case when a minimum shedding stroke is reached at the beginning of the weft insertion and at its end.
  • the heald remains in one of its open shed positions, it is not necessary to synchronize the course of hive movement with other parts of the weaving machine; in particular, the weft insertion does not have to be synchronized with the heald first transitional movement.
  • the duration of the first transition movement is independent of the period of the weft insertion period between two consecutive weft entries. This makes it possible to optimize the first transition movement in terms of jerk and shock-free, to avoid acceleration jumps and also to minimize the amount of the maximum acceleration value.
  • the duration of the first transition movement may be shorter or longer than the period of the weft insertion period.
  • the shaft drive can also during the second open shed position a rest portion having a detent position, wherein the position of the heald substantially corresponds to the position of the heald at the second turning point. This makes sense if the heald should be kept in the corresponding open shed position both after the shedding movement in the first open shed position, and after the shedding change in the second open shed position over several weft entries, for example, at least three weft entries before the next shedding change is performed.
  • the first transitional movement may begin with a weft insertion period and the first movement phase may end before the subsequent weft insertion period. It is also possible that the first transitional movement begins with a weft insertion period and the second movement phase ends only in the subsequent weft insertion period. A synchronization with the weft entries, or the weft insertion periods is not required.
  • the first transitional movement can be optimized with regard to heald shaft accelerations or acceleration changes.
  • the course of motion is predetermined via a cam of the output device.
  • the shaft drive is designed as an eccentric drive.
  • the heald undergoes a second transitional movement.
  • the second transitional movement corresponds to the movement of the described first reverse movement in reverse order. This means that the first transitional movement, which has led from the first reversal point into the latching position is carried out in reverse order during the second transitional movement, so that the heald from the detent position brought to the first reversal point and from there without impermissibly high acceleration a shedding change in can perform the second reversal point of the second open subject position.
  • the same processes can also be performed in a further locking position in the second open shed position, if there should be provided a detent position.
  • the heald In order to synchronize the tray changing movement subsequent to the rest section with the weft insertion, the heald reaches the reversal point of the open shed position adjoining the detent position at the time of commencement of a weft insertion period. The second transitional movement therefore ends at the beginning of a weft insertion period.
  • the weft insertion can be done in the loom depending on the rotation angle of the drive shaft, for example once per revolution.
  • a cam for a shaft drive this can be driven via the drive shaft and connected via the output direction with the heald.
  • the circumferentially changing radius of the cam determines the course of motion of the heald, depending on the angle of rotation of the cam.
  • a first cam sector specifies the transitional movement in which the heald as described during the rest section from the first reversal point of the first open shed position is transferred to the detent position.
  • This first cam sector has two sector sections, the first sector section passing through the first phase of movement defines the reversal point.
  • the adjoining second sector section determines the second movement phase of the heald immediately following the first movement phase into the rest position.
  • FIG. 1 schematically a shaft drive 10 is shown, which is connected via a linkage 11 with a heald 12.
  • the shaft drive 10 is designed as an eccentric drive in the embodiment, wherein the rotational movement of a drive shaft 13 is converted into a reciprocating motion of a rocker 14 which is connected to the linkage 11. In this way, the rotational movement of the drive shaft 13 leads to an oscillating stroke H of the heald 12, which is carried out in particular in the vertical direction.
  • a weaving machine generally comprises a plurality of healds 12, which are each connected via a linkage 11, each with a rocker 14 of the shaft drive 10.
  • a cam 15 is rotatably coupled, as in FIG. 2 is shown schematically.
  • the cam 15 rotates about its axis of rotation 16.
  • a cam follower 17 abuts the outer contour of the cam 15, so that its distance from the axis of rotation 16 is determined by the radius r of the cam 15, wherein the radius r in the circumferential direction of the cam 15 changes ,
  • the rockers 14 of the shaft drive 10 are moved and a corresponding stroke H of the heald 12 caused.
  • the shaft drive 10 causes a predetermined course of movement of the heald 12.
  • the course of motion is defined as a stroke H in dependence on the rotation angle ⁇ of the drive shaft 13 and in Figures 3-5 illustrated by various examples.
  • the heald 12 performs a lifting movement H, being moved back and forth between a first open shed position O1 and a second open shed position 02.
  • the first weaving shank for example, in the open shed position O1 and the second is in the open shed position 02.
  • the open shed position O1, 02 is the position of the weaving shank 12 with a minimum amount H min .
  • the open shed position O1, 02 comprise a stroke range, which may comprise up to one third of the total stroke H ( ⁇ ) of the heald 12.
  • the maximum stroke H max reaches the heald 12 in the reversal points T1, T2 of the open shed positions O1, 02.
  • the first reversal point T1 is the position absolute maximum stroke H max in the first open position O1 and the second reversal point T2 is the position absolute maximum stroke H. max in the second open shed position 02 respectively at the beginning or at the end of a shed change movement F.
  • the course of movement of the shackle 12 is in the embodiment according to FIG. 3 divided into five weft insertion periods P.
  • the weft insertion period P is the time duration between two consecutive weft entries S1, S2, S3, S4, S5.
  • the weft entries S1-S5 take place in the end area of a weft insertion period P and the initial area of the subsequent weft insertion period P, as shown in FIG FIG. 3 is schematically illustrated by the black bars.
  • the shaft drive 10 initiates a tray exchange movement F from the second open shed position 02 to the first open shed position O1 and more precisely from the second reversal point T2 to the first reversal point T1.
  • the subject change movement F as a function of the rotation angle ⁇ is based on a harmonic oscillation and is, for example, sinusoidal.
  • the duration of the tray change movement F corresponds in the embodiment according to FIG.
  • the tray change movement F may differ from the beginning or end points of the weft insertion periods P.
  • the shifter movement F may include a period that is greater or less than the period for the weft insertion. Decisive is only that the weft entries Si can take place smoothly.
  • the rest section Ra corresponds to the duration of three weft insertion periods P.
  • the shaft drive 10 causes a movement which can be composed of several movement phases.
  • the heald 12 moves without stoppage or detent phase by means of a first transitional movement B, which may be formed by one or more superposed harmonic oscillations, within its open shed position O1.
  • the first transitional movement B is independent of the period of the weft insertion period P and may be shorter or longer than the weft insertion period P.
  • the first transitional movement B may include a startup phase B0 and a first movement phase B1 as well as a second movement phase B2.
  • According to the embodiment Figures 3 and 4 is the duration of the first transitional movement B longer than a weft insertion period P.
  • the lifting height H of the detent position R and the lifting height H max could deviate from each other while the minimum stroke H min must not be exceeded in order to keep the shed open in the first open position O1, so that a weft insertion can be done without interference.
  • the heald 12 firstly performs a reversed second transitional movement B ', in order subsequently to change from the first reversal point T1 of the open shed position O1 to the second reversal point T2 of the second open shed position 02.
  • the transitional movement B is defined by three movement history specifications of the shaft drive 10.
  • the movement course specifications correspond to laws of motion B0, B1, B2, which are predetermined in the shaft drive 10 and which follow the heald shaft 12 during the operation of the shaft drive 10.
  • the transition between the movement history specifications takes place independently of the weft entries S1-S5 or independently of the beginning and end of the weft insertion periods P.
  • the first transitional movement B is not synchronized with the weft entries S1-S5.
  • the stroke H of the heald frame 12 in the direction change point U between 60 and 90% and preferably at least 66% of the maximum stroke H can be max.
  • the stroke H U in the direction change point U is greater than the minimum stroke H min required for keeping the shed open, so that the heald 12 is also in the direction change point U in the first open shed position O1.
  • the heald follows a first course of motion in this first movement phase B1, which may be preceded by a start phase B0.
  • a second movement phase B2 which is defined by a second course of motion specification.
  • the first and the second course of motion specification are different from one another and provide different stroke movement functions H as a function of the rotation angle ⁇ .
  • the second movement history specification of the second movement phase B2 serves to move the heald jerk-free into the rest position R.
  • FIG. 4 ends the first movement phase B1 within the weft insertion period P, which has begun with the achievement of the first reversal point T1 of the first open position O1.
  • the second movement phase B2 is executed according to the example during the third weft insertion S3.
  • the heald 12 is in its rest position R, in which it remains.
  • the shaft drive 10 does not directly cause a tray exchange movement F in the second open shed position 02, but it is first a second Transitional movement B 'performed.
  • the second transitional movement B ' corresponds to the course of the first transitional movement B with reversed motion sequence.
  • the second transitional movement B 'thus corresponds to the course of movement that would be obtained if, starting from the latching position R, the direction of rotation of the drive shaft 13 was reversed and the first transitional movement B would again run backwards to the first reversal point T1.
  • the first transitional movement B is defined by three mutually different laws of motion B0, B1 and B2.
  • the movement phase B0 represents the initiation of the first transitional movement B and forms the transition from the first reversal point T1 of the heald shaft 12 in the open shed position O1 to the first movement phase B1.
  • the course of motion specification the law of motion
  • the heald 12 moves through the direction change point U within the first open shed position O1 through to first movement phase B1 according to the same law of motion, for example, a sine function.
  • the heald 12 Starting from the latching position R, during the second transitional movement B 'the heald 12 first passes through the movement phase B2',. Immediately following the movement phase B2 'follows the movement phase B1', which is followed by the movement phase B0 ', which again corresponds to the movement law of the change of subject movement F from the first reversal point T1 of the first open position O1 to the second reversal point T2 of the second open position 02, so that also here the heald 12, starting from its direction change point, performs a movement through the first reversal point T1, without the law of motion changing.
  • FIG. 4 In FIG. 4 are shown in the lower diagram, the acceleration of the heald shaft 12 depending on the rotation angle ⁇ . It can be seen that no acceleration jumps occur and therefore the course of motion is smooth.
  • a jerk-free movement is to be understood as a movement without an impermissibly large change in acceleration. A jerk occurs in particular during acceleration jumps. All motion characteristics are based on harmonic oscillations, such as sine waves. Acceleration changes can be allowed up to a maximum allowable amount at the junctions between two different motion history presets.
  • the entire course of movement H ( ⁇ ) of the heald 12 is preferably twice continuously differentiable, as by FIG. 4 illustrated.
  • the maximum amount a max of the shaft shaft acceleration occurs at the reversal points T1, T2. In the direction change points U, the amount of acceleration is approximately in the range of 60 to 90% and in particular 80% of the maximum amount a max .
  • the second transitional movement B ' ends with the beginning of a weft insertion period P.
  • the second transitional movement B' as well as the first transitional movement B must not take place in synchronism with the weft insertion with regard to the second transitional movement B ', reference can be made to the explanations regarding the first transitional movement B.
  • FIG. 5 a second embodiment of a realizable with the shaft drive movement pattern is shown, the example performs a firing sequence 2/4.
  • the first open shed position O1 is taken in contrast to the previously described embodiment with negative strokes H, while the second open shed position 02 positive stroke values are assigned.
  • a detent position R is required within a rest portion Ra of a weaving sheave drive depends on the conditions of the loom shank drive and the fabric to be produced.
  • the heald frame 12 can adopt a detent position R as an alternative to the illustrated movement progressions H ( ⁇ ) both when the compartment is open in the first open compartment position O1 and when the compartment is open in the second open compartment position 02, if this is sensible or necessary, For example, if the dwell time of the heald frame 12 in both open shed positions O1, 02 is sufficiently long, for example in the case of shots of 3/3 or 4/4.
  • cam 15 of the eccentric drive shaft drive 10 corresponds to the in Figures 3 and 4
  • the cam disk 15 has a first cam sector 20 which predefines the first transition movement B.
  • the first cam sector 20 has a first sector section 21 and a second sector section 22, which adjoin one another directly.
  • the first sector section 21 defines the first movement history or the first movement law according to which the heald 12 moves during the first movement phase B1 of the first transitional movement B.
  • the adjoining second sector section 22 indicates the second course of motion specification during the second course of motion B2.
  • the first cam disk sector 20 is followed by a second cam disk sector 25, during which the radius r of the cam disk 15 is constant.
  • the second cam sector 25 defines the detent position R of the heald 12.
  • a straight line G which extends in the direction of the bisector of the second cam sector 25 and the axis of rotation 16 of the cam 15 intersects, forms an axis of symmetry.
  • the cam 15 is designed mirror-symmetrically to the straight line G. This automatically results in the second transitional movement B 'in a third cam sector 26 adjoining the second cam sector 25 in a clockwise direction.
  • the portion of the cam 15 between the first cam sector 20 and the third cam sector 26 defines the bin exchange movement F from the first open compartment position O1 in FIG second open position 02 and from there back to the first open position O1, as shown in FIG. 3 is illustrated.
  • the cam 15 is an easy way to achieve the movement of the heald 12.
  • Each weaving shank 12 of the loom is assigned a separate cam 15 which defines its course of movement H ( ⁇ ).
  • the shaft drive according to the invention not only determines individual movement phases of the heald 12, but the entire course of movement and the transitions between the individual phases of motion matched, there are significant advantages in the operation of the loom.
  • the inertial forces remain low and the warp threads are less stressed. It can be cheaper Achieve Webschaftkonstrutationen also for high Web achievements. Lower warp stress reduces the yarn breakage and the efficiency of the loom increases. Maximum acceleration and acceleration jumps can be kept low.
  • the horseshoe speed and horseshoe acceleration can be optimized so that their amounts can be limited to small values. As a result, furthermore, the drive power of the shaft drive can be made smaller than in previously known shaft drives.
  • the present invention relates to a shaft drive 10 for a heald 12 of a loom.
  • An output device 17, 14, 11 converts the rotational movement of a drive shaft 13 into an oscillating movement of the heald 12 between a first reversal point T1 of a first open shed position O1 and a second reversal point T2 of a second open shed position 02.
  • the shank drive 10 causes a first transitional movement B of the heald 12 within a rest section Ra through a direction change point U to a detent position R of the heald 12, which has substantially the same stroke value H as FIG the first reversal point T1 within the first open position O1.
  • Both the change of subject movement and the transitional movement B are based on harmonic functions and are continuously differentiable at least twice.
  • the first transitional movement B from the first reversal point T1 of the first open position O1 to the rest position R of the heald 12 is defined by three different laws of motion, whereby the heald 12 passes through three consecutive phases of motion B0, B1, B2 until it has reached the detent position R.
  • the duration of the first transition movement B is not synchronized with the duration of the weft insertion periods P, indicating the length of time between two consecutive weft entries.
  • the shaft drive 10 is preferably embodied as an eccentric drive with a cam 15 which determines the course of movement H as a function of the angle of rotation ⁇ of a rotating drive shaft 13.

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Claims (15)

  1. Métier à tisser mécanique comportant un mécanisme d'entraînement de lame destiné à une lame (12),
    lequel est doté d'un dispositif de sortie (11,14,17) reliant un arbre d'entraînement (13) à la lame (12) qui transforme la rotation de l'arbre d'entraînement (13) en un mouvement oscillant (F) de changement de foule de la lame (12) entre un premier point de retour (T1) d'une première position d'ouverture de foule (O1) et un deuxième point de retour (T2) d'une deuxième position d'ouverture de foule (02),
    le dispositif (10) d'entraîncment de lame fait passer la lame (12) après qu'un premier point de retour (T1) a été atteint dans la première position d'ouverture de foule (O1) dans une section de repos (Ra) dans laquelle la lame (12) reste dans sa première position d'ouverture de foule (O1),
    le dispositif (10) d'entraînement de lame imprimant à la lame (12) pendant la durée de la section de repos (Ra) un premier mouvement de transition (B) par lequel la lame (19) est amenée à une position d'arrêt (R), dans laquelle la position de la lame (12) correspond essentiellement à la position de la lame (12) au premier point de retour (T1), caractérisé en ce que
    le dispositif (10) d'entraînement de lame délivre à la lame (12), pour le premier mouvement de transition (B), dans une première phase de mouvement (B1), un premier ordre de déroulement de mouvement tandis que la lame (12) passe par un premier point de changement de direction (U) à l'intérieur de la première position d'ouverture de foule (O1),
    une deuxième phase de mouvement (B2) du mouvement de transition (B) se raccordant immédiatement à la première phase de mouvement (B1) et le dispositif (10) d'entraînement de lame délivrant à la lame (12) pour la deuxième phase de mouvement (B2) un deuxième ordre de déroulement de mouvement qui se distingue du premier ordre de déroulement de mouvement.
  2. Métier à tisser mécanique selon la revendication 1 caractérisé en ce que le déroulement de mouvement imprimé à la lame (12) peut être différencié au moins deux fois de façon continue.
  3. Métier à tisser mécanique selon la revendication 1 caractérisé en ce que le déroulement de mouvement du mouvement (F) de changement de foule est provoqué en fonction de l'angle de rotation (ϕ) de l'arbre d'entraînement (13) sur la base d'une fonction harmonique.
  4. Métier à tisser mécanique selon la revendication 1 caractérisé en ce que le premier ordre de déroulement de mouvement et/ou le deuxième ordre de déroulement de mouvement est/sont délivré(s) en fonction de l'angle de rotation (ϕ) de l'arbre d'entraînement (13) sur la base d'une fonction harmonique.
  5. Métier à tisser mécanique selon la revendication 1 caractérisé en ce que la durée d'un mouvement (F) de changement de foule d'une position d'ouverture de foule (O1, O2) à l'autre position d'ouverture de foule (O2, O1) correspond à la durée de période d'une période (P) d'introduction de trame entre deux introductions de trame (S1 - S5).
  6. Métier à tisser mécanique selon la revendication 5 le mouvement (F) de changement de foule débute pendant une introduction de trame (S1) et se termine pendant l'introduction de trame (S2) suivante.
  7. Métier à tisser mécanique selon la revendication 1 caractérisé en ce que la durée d'un mouvement (F) de changement de foule depuis une position (O1, O2) d'ouverture de foule jusqu'à l'autre position d'ouverture de foule (O2, O1) est indépendante de la durée de période d'une période (P) d'introduction de trame entre deux introductions de trame (S1 - S5).
  8. Métier à tisser mécanique selon la revendication 7 caractérisé en ce que le mouvement (F) de changement de foule et la période (P) d'introduction de trame débutent et se terminent à des instants différents.
  9. Métier à tisser mécanique selon la revendication 1 caractérisé en ce que la durée du premier mouvement de transition (B) est indépendante de la durée de période de la période (P) d'introduction de trame entre deux introductions de trame.
  10. Métier à tisser mécanique selon la revendication 1 caractérisé en ce que le premier mouvement de transition (B) débute par une période (P d'introduction de trame et en ce que la première phase (B1) de mouvement se termine avant la période (P) d'introduction de trame suivante.
  11. Métier à tisser mécanique selon la revendication 10 caractérisé en ce que le premier mouvement de transition (B) débute par une période (P) d'introduction de trame et en ce que la deuxième phase de mouvement (B2) ne se termine que dans la période (P) d'introduction de trame suivante.
  12. Métier à tisser mécanique selon la revendication 1 caractérisé en ce qu'une lame (12) qui se trouve dans la position d'arrêt (R) exécute un deuxième mouvement de transition (B') en vue d'être déplacée jusqu'à un premier point de retour (T1) avec une course maximum (Hmax) de la première position d'ouverture de foule (O1), le deuxième mouvement de transition étant obtenu par symétrie (B') du premier mouvement de transition (B) par rapport à une parallèle à l'ordonnée.
  13. Métier à tisser mécanique selon la revendication 12 caractérisé en ce que la lame (12) après l'exécution du deuxième mouvement de transition (B') atteint le premier point de retour (T1) à l'instant du début d'une période (P) d'introduction de trame.
  14. Métier à tisser mécanique selon la revendication 1 caractérisé en ce que l'introduction de fil de trame s'effectue en fonction de l'angle de rotation (ϕ) de l'arbre d'entraînement (13), en particulier une fois par rotation.
  15. Métier à tisser mécanique selon la revendication 1 caractérisé en ce que le dispositif d'entraînement de lame présente un disque à came,
    qui peut être entraîné par un arbre d'entraînement (13) et qui peut être relié à la lame (12) par l'intermédiaire d'un dispositif de sortie (11, 14, 17), grâce à quoi un
    mouvement oscillant de la lame (12) est provoqué entre un premier point de retour (T1) d'une première position (O1) d'ouverture de foule et un deuxième point de retour (T2) d'une deuxième position (02) d'ouverture de foule,
    le rayon (r) du disque à came (15) variant dans la direction périphérique de celui-ci, grâce à quoi le déroulement du mouvement (H) en ce qui concerne la lame (12) est redu dépendant de l'angle de rotation du disque à came (15),
    avec un premier secteur (20) de disque à came qui provoque un premier mouvement de transition (B) par lequel la lame (12) passe du premier point de retour (T1) de la première position d'ouverture de foule (O1) à une position d'arrêt (R) à l'intérieur de la première position (O1) d'ouverture de foule,
    le premier secteur (20) de disque à came présentant une première section (21) de secteur qui provoque avec un premier ordre de déroulement de mouvement une première phase de mouvement (B1) la lame dans laquelle la lame (12) passe par un point (U) de changement de direction situé à l'intérieur de la première position (O1) d'ouverture de foule,
    une deuxième section (22) de secteur se raccordant à la première section (21) de secteur, avec un deuxième ordre de déroulement de mouvement qui se distingue du premier ordre de déroulement de mouvement, pour une deuxième phase de mouvement (B2) qui se termine dans la position d'arrêt (R).
EP20090165912 2009-07-20 2009-07-20 Dispositif d'entraînement pour un cadre de lisses d'un métier à tisser Not-in-force EP2278052B1 (fr)

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CN105002621A (zh) * 2015-08-24 2015-10-28 吴江万工机电设备有限公司 一种消极式开口凸轮的余弦运动规律的修正方法
CN105420879A (zh) * 2015-11-09 2016-03-23 吴江万工机电设备有限公司 主回凸轮形状相同的开口共轭凸轮机构的尺度综合方法
CN114990765B (zh) * 2022-07-06 2023-07-21 天津工业大学 一种间隔织物用钢筘运动路径规划及其驱动控制方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1422164A (fr) * 1964-10-16 1965-12-24 Tripette & Renaud Perfectionnements apportés aux machines à tisser
US4170250A (en) * 1977-01-17 1979-10-09 Cone Mills Corporation Loom harness mechanism
DE2744795C2 (de) 1977-10-05 1979-08-02 Lindauer Dornier Gesellschaft Mbh, 8990 Lindau Verfahren zur einschüssigen Herstellung von Doppelflorgeweben
DE3623016C1 (en) 1986-07-09 1987-09-03 Dornier Gmbh Lindauer Shuttleless weaving machine for the single-shot production of double-pile fabric
DE9414192U1 (de) 1994-09-01 1994-10-27 Stäubli & Trumpelt GmbH, 95448 Bayreuth Fachbildungsvorrichtung
KR100476955B1 (ko) 2002-12-03 2005-03-17 삼성전자주식회사 습식 전자사진방식 프린터의 가스 배출장치
DE10343377B3 (de) 2003-09-17 2005-04-28 Groz Beckert Kg Schaftantrieb für Webmaschinenschäfte
US7475708B2 (en) 2004-11-17 2009-01-13 Groz-Beckert Kg Shaft drive for heald shafts of weaving machines
DE502007005459D1 (de) 2007-03-28 2010-12-09 Groz Beckert Kg Kurvenscheibe für eine Fachbildeeinrichtung einer Webmaschine

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EP2278052A8 (fr) 2011-04-20

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