EP1091031A2 - Mechanismus zur Betätigung der Weblade und der Greiferbänder in eine Webmaschine - Google Patents

Mechanismus zur Betätigung der Weblade und der Greiferbänder in eine Webmaschine Download PDF

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Publication number
EP1091031A2
EP1091031A2 EP00120738A EP00120738A EP1091031A2 EP 1091031 A2 EP1091031 A2 EP 1091031A2 EP 00120738 A EP00120738 A EP 00120738A EP 00120738 A EP00120738 A EP 00120738A EP 1091031 A2 EP1091031 A2 EP 1091031A2
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EP
European Patent Office
Prior art keywords
actuating
grippers
sley
rocker arm
pair
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Withdrawn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
EP00120738A
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English (en)
French (fr)
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EP1091031A3 (de
Inventor
Stefano Nanni
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.)
Promatech SpA
Original Assignee
Promatech SpA
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 Promatech SpA filed Critical Promatech SpA
Publication of EP1091031A2 publication Critical patent/EP1091031A2/de
Publication of EP1091031A3 publication Critical patent/EP1091031A3/de
Withdrawn legal-status Critical Current

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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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/271—Rapiers
    • D03D47/272—Rapier bands
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/275—Drive mechanisms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/60—Construction or operation of slay

Definitions

  • the present invention relates to a mechanism for actuating the sley and the belts of grippers in a weaving loom.
  • Said secondary shaft is provided with a first pair of conjugate cams which engage with a first rocker arm, for conversion of the continuous circular movement into an alternating circular movement, about an axis parallel to the main axis, suitable for actuating the sley.
  • a second pair of conjugate cams are also keyed onto said secondary shaft and engage with a second rocker arm, the movement of which, via a kinematic multiplication chain and then an angular transmission comprising a bevel gear pair, is converted into an alternating circular movement, about an axis perpendicular to the main axis, suitable for actuating the grippers.
  • FIG. 1 An example of a kinematic chain of this type is illustrated in Fig. 1.
  • the main motor M of the loom which rotatably drives the main shaft A of the loom and therefore the secondary shaft B via the pair of gear wheels G.
  • a first pair of cams C1 is keyed onto the shaft B and, by means of a rocker arm L1 (only partially visible in the drawing), causes the alternating rotation of the shaft P of the sley.
  • a second pair of conjugate cams C2 is also keyed onto the secondary shaft B and, by means of a second rocker arm L2 and a kinematic chain comprising a connecting-rod/crank assembly V, a train of gears T and an angular transmission R, causes the alternating rotation of the gear wheel D driving the belt N of one of the weft insertion grippers.
  • a corresponding mechanism is normally arranged on the other side of the loom so as to provide bilateral actuation of the sley P as well as driving of the other loom gripper.
  • the mechanisms of the known type also have other disadvantages.
  • the kinematic chains composed of gear wheels with an alternating rotary movement - such as those arranged between the second rocker arm and the gear wheel actuating the grippers - create noise-related problems when they are operated at the high speeds required for modern-day looms.
  • the wear of the gear wheels is much more rapid and the adjustment and the elimination of the slack represents an important part of maintenance of the loom.
  • These problems are even more accentuated when the gear wheels performing a mutual alternating movement do not have parallel axes; the abovementioned angular transmission comprising a bevel gear pair is therefore particularly critical, especially due to the high speeds involved.
  • the object of the present invention is therefore that of providing a mechanism for actuating the sley and the grippers which is simplified compared to the known mechanisms and in particular which allows the number of gear wheels in the kinematic chain with an alternating rotary movement to be reduced drastically and is able to eliminate completely the presence of angular transmissions with an alternating rotary movement which, as seen above, are the main sources of drawbacks in the known mechanisms.
  • a mechanism for actuating the sley and the belts of grippers in weaving looms characterized in that the continuous rotary movement of the main axis of the loom is transferred, by means of an angular transmission comprising a bevel gear pair, to a secondary shaft which is perpendicular thereto and on which a pair of conjugate radial cams is keyed, said cams causing, by means of an associated rocker arm, the movement of the gear wheel driving the belts of the grippers, and in that a spherical cam is also axially mounted on said secondary shaft, said cam actuating a rocker arm, the fulcrum of which is directly connected to the shaft of the sley.
  • the rocker arm actuated by the pair of conjugate radial cams is connected, by means of a crank/connecting-rod assembly, to an oscillating toothed crown which meshes with an axial pinion of the gear wheel actuating the belts of the grippers.
  • Fig. 3 shows in schematic form the basic elements of the mechanism for actuating the sley and the belts of the grippers according to the present invention.
  • This mechanism consists of a secondary shaft 1 perpendicular to the main shaft A or - which is the same thing - to a shaft branched from the latter and parallel thereto.
  • the shaft 1 receives its movement from the shaft A via a bevel gear pair 2 and therefore performs a continuous rotary movement.
  • the spherical cam 4 is provided with two rolling tracks, i.e. an outer track 4e and inner track 4i, on which rollers 5e and 5i, i.e. an outer roller and inner roller, of a rocker arm 6 provided with a counterweight 6a travel.
  • rollers 5e and 5i i.e. an outer roller and inner roller
  • the fulcrum of the rocker arm 6 is rigidly fixed to the axis of rotation P of the sley 7 which supports the reed 8 to which the desired alternating oscillating movement about the axis P, parallel to the main shaft A of the loom, is therefore imparted in a direct manner.
  • the radial cams 3 co-operate, in a manner known per se, with a rocker arm 9 comprising rollers, as illustrated in Fig. 4.
  • a rocker arm 9 comprising rollers, as illustrated in Fig. 4.
  • the oscillating movement of this second rocker arm may be used immediately and directly to impart the alternating rotary movement to the gear wheel D driving the belt N of the grippers Z.
  • This system comprises, in fact, the rocker arm 9 which converts the continuous rotary movement of the conjugate cams 3 with which it is engaged into an alternating rotary movement; this movement is then transmitted to a crank 10 which is rigidly associated with the fulcrum of the rocker arm 9.
  • the free end of the crank 10 then causes in turn the oscillating movement, by means of a connecting rod 11, of the vertex of a toothed sector 12 pivotably mounted on the loom at 13.
  • the toothed crown 12a of the sector 12 engages with a pinion 14 which is integral and coaxial with the hub 15 of the gear wheel D.
  • the desired multiplication ratio between the oscillating movement of the rocker arm 9 and that of sector 12 is obtained by adjusting the position of the base of the connecting rod 11 on the crank 10, while the choice in the position of the fulcrum 13 of the sector 12 determines the desired multiplication ratio between the travel of the connecting rod 11 and the much greater travel of the toothed crown 12a, thereby eliminating completely the train of gears provided for this purpose in the mechanisms of the known type, which is replaced by the single coupling between the toothed crown 12a and the pinion 14 of the gear wheel D.
  • the actuating mechanism according to the present invention therefore consists of a single secondary shaft - the shaft 1, which is arranged perpendicularly with respect to the main shaft A - and is entirely devoid of angular transmissions between shafts performing an alternating movement; it therefore has minimum dimensions, a high degree of compactness and an optimum transmission efficiency.
  • the actuating mechanism according to the present invention may therefore be used with particular success both in an asymmetrical arrangement on one side only of the loom, where the height of the loom is low, and in a symmetrical arrangement - in which the said mechanism is duplicated and symmetrically arranged on both sides of the loom, as illustrated in Fig.
  • the sley may have a very lightweight structure, to the advantage of the maximum speeds which can be achieved, while maintaining limited lateral dimensions of the loom owing to the compactness of the said mechanism.
  • the actuating mechanism according to the present invention is also able to achieve an excellent balance between the internal stresses of the various components of the mechanism, such as to minimise the stresses transmitted to the support bearings of the mechanism which are fixed to the loom structure.
  • the inclination of the helix of the bevel gear pair 2 may in fact be designed so that the component F - parallel to the shaft 1 - of the force exchanged in the gearing has a value equal to the minimum value assumed by the component S of the variable force exchanged in the engagement between the spherical cam 4 and the rollers 5 of the rocker arm 6. In this way, the resultant of the forces S and F will never have an excessively high value and moreover will always have the direction of the force S, thus avoiding in the most absolute manner any possible longitudinal oscillation or vibration of the shaft 1.
  • rollers 5 of the rocker arm 6 should preferably occur with a predefined preloading force.
  • Preloading of the rollers 5 is achieved, in a manner known per se, by means of an eccentric pin on the outer roller 5b, or by using rollers 5e and 5i of different sizes or, finally, by axially displacing the spherical cam 4 with the insertion of suitable spacers.
  • the form of the lateral surface of the rollers 5 must also be designed with particular care. Since, in fact, the rolling tracks of the rollers 5 on the cam 4 are inclined with respect to the axis of the shaft 1, the peripheral speed of the cam 4 is obviously variable at different points of the track simultaneously making contact with each roller 5.
  • the lateral surface of the said rollers is shaped so as to have a convex instead of a cylindrical profile; in this way, in fact, the area of contact between roller and cam is an elliptical area having its greater axis - albeit with smaller dimensions - arranged tangentially with respect to the cam such that the problem of partial slipping between these components in relative movement is greatly reduced.
  • the mechanism according to the present invention is in fact extraordinarily compact and is able to achieve direct actuation both of the sley and of the gripper belts, eliminating entirely the presence of angular transmissions between gearings with an alternating rotary movement - the sole angular transmission being in fact that, with a continuous rotary movement, between the main shaft and the secondary shaft - and reducing the number of coupling between gearings with an alternating rotary movement to only one, i.e. that between the toothed sector and pinion of the gear wheel driving the gripper belts.
  • This mechanism owing to its features, is therefore particularly suitable for use in high-speed looms, thus ensuring an excellent performance, a high degree of compactness and a reduced noise level.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
  • Moulding By Coating Moulds (AREA)
  • Woven Fabrics (AREA)
EP00120738A 1999-09-23 2000-09-22 Mechanismus zur Betätigung der Weblade und der Greiferbänder in eine Webmaschine Withdrawn EP1091031A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1999MI001976A IT1313377B1 (it) 1999-09-23 1999-09-23 Cinematismo di comando del battente e dei nastri delle pinze in untelaio di tessitura.
ITMI991976 1999-09-23

Publications (2)

Publication Number Publication Date
EP1091031A2 true EP1091031A2 (de) 2001-04-11
EP1091031A3 EP1091031A3 (de) 2003-09-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP00120738A Withdrawn EP1091031A3 (de) 1999-09-23 2000-09-22 Mechanismus zur Betätigung der Weblade und der Greiferbänder in eine Webmaschine

Country Status (2)

Country Link
EP (1) EP1091031A3 (de)
IT (1) IT1313377B1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020014382A (ko) * 2000-08-17 2002-02-25 방광배 레피어 직기용 구동장치
DE10137183A1 (de) * 2001-07-31 2003-02-20 Staeubli Gmbh Antriebsvorrichtung für Arbeitselemente an Webmaschinen
DE102005039738A1 (de) 2005-08-23 2007-03-01 Schaeffler Kg Betätigungsmechanismus einer Greifer-Webmaschine
CN100453721C (zh) * 2006-09-30 2009-01-21 苏州鸿仁窗饰有限公司 帘片编织机的传动机构
CN101696528B (zh) * 2009-10-22 2011-05-25 浙江理工大学 非圆齿轮行星轮系打纬机构
WO2012065316A1 (zh) * 2010-11-19 2012-05-24 北京光华纺织集团有限公司 引纬装置
CN104404696A (zh) * 2014-11-26 2015-03-11 浙江理工大学 一种剑杆织机空间凸轮引纬以及打纬机构
CN105714454A (zh) * 2016-03-23 2016-06-29 浙江万利纺织机械有限公司 一种带有静平衡结构的剑杆织机主轴组件及初始相位的定位方法
CN115074894A (zh) * 2022-07-06 2022-09-20 天津工业大学 一种间隔织物用双层刚性剑杆驱动与控制方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101603232B (zh) * 2009-05-14 2011-01-26 经纬纺织机械股份有限公司 剑杆织机非圆齿轮引纬装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3320064C2 (de) * 1983-06-03 1988-06-16 Lindauer Dornier Gmbh, 8990 Lindau Einrichtung zur zwangsläufigen Betätigung der Klemmvorrichtung von Schußfadeneintragorganen bei schützenlosen Webmaschinen
FR2584425A1 (fr) * 1985-07-04 1987-01-09 Saurer Diederichs Sa Mecanisme de commande pour machine a tisser sans navette a rubans flexibles.
IT1204675B (it) * 1987-06-03 1989-03-10 Colombo Filippetti Srl Dispositivo per la trasformazione di un moto rotatorio uniforme in un moto rotatorio alternativo,particolarmente adatto per telai tessili

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020014382A (ko) * 2000-08-17 2002-02-25 방광배 레피어 직기용 구동장치
DE10137183A1 (de) * 2001-07-31 2003-02-20 Staeubli Gmbh Antriebsvorrichtung für Arbeitselemente an Webmaschinen
DE102005039738B4 (de) 2005-08-23 2018-07-26 Schaeffler Technologies AG & Co. KG Betätigungsmechanismus einer Greifer-Webmaschine
DE102005039738A1 (de) 2005-08-23 2007-03-01 Schaeffler Kg Betätigungsmechanismus einer Greifer-Webmaschine
CN100453721C (zh) * 2006-09-30 2009-01-21 苏州鸿仁窗饰有限公司 帘片编织机的传动机构
CN101696528B (zh) * 2009-10-22 2011-05-25 浙江理工大学 非圆齿轮行星轮系打纬机构
WO2012065316A1 (zh) * 2010-11-19 2012-05-24 北京光华纺织集团有限公司 引纬装置
CN104404696A (zh) * 2014-11-26 2015-03-11 浙江理工大学 一种剑杆织机空间凸轮引纬以及打纬机构
CN104404696B (zh) * 2014-11-26 2016-01-20 浙江理工大学 一种剑杆织机空间凸轮引纬以及打纬机构
CN105714454A (zh) * 2016-03-23 2016-06-29 浙江万利纺织机械有限公司 一种带有静平衡结构的剑杆织机主轴组件及初始相位的定位方法
CN105714454B (zh) * 2016-03-23 2017-08-04 浙江万利纺织机械有限公司 一种带有静平衡结构的剑杆织机主轴组件及初始相位的定位方法
CN115074894A (zh) * 2022-07-06 2022-09-20 天津工业大学 一种间隔织物用双层刚性剑杆驱动与控制方法
CN115074894B (zh) * 2022-07-06 2024-03-22 天津工业大学 一种间隔织物用双层刚性剑杆驱动与控制方法

Also Published As

Publication number Publication date
ITMI991976A1 (it) 2001-03-23
EP1091031A3 (de) 2003-09-03
ITMI991976A0 (it) 1999-09-23
IT1313377B1 (it) 2002-07-23

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