EP0884410A1 - Vierstellungs-Offenfach-Jacquardmaschine - Google Patents

Vierstellungs-Offenfach-Jacquardmaschine

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Publication number
EP0884410A1
EP0884410A1 EP98201902A EP98201902A EP0884410A1 EP 0884410 A1 EP0884410 A1 EP 0884410A1 EP 98201902 A EP98201902 A EP 98201902A EP 98201902 A EP98201902 A EP 98201902A EP 0884410 A1 EP0884410 A1 EP 0884410A1
Authority
EP
European Patent Office
Prior art keywords
hook
height
jacquard machine
forming mechanism
shed forming
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.)
Granted
Application number
EP98201902A
Other languages
English (en)
French (fr)
Other versions
EP0884410B1 (de
Inventor
André Dewispelaere
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0884410A1 publication Critical patent/EP0884410A1/de
Application granted granted Critical
Publication of EP0884410B1 publication Critical patent/EP0884410B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/06—Double-lift jacquards
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/12—Multiple-shed jacquards, i.e. jacquards which move warp threads to several different heights, e.g. for weaving pile fabrics
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/24—Features common to jacquards of different types

Definitions

  • This invention relates to a shed forming mechanism for a jacquard machine, comprising two hooks both of which can be held in a bottom and a top position and through upwardly and downwardly movable raising means can be taken out of each position into the other position, a selecting device provided for maintaining or allowing the raising means to change each position of each hook as desired, and a pulley device working together with the hooks provided for bringing warp threads to four different heights, whereby the height of the warp threads is changed by a change in the position of each respective hook in proportion to the change of height of the hook.
  • Weaving with a weaving machine is principally effected by repeatedly forming a shed between warp threads and inserting into this shed one or more weft threads running in transverse direction.
  • the successive sheds are formed by, in each case prior to every pick (i.e. the simultaneous insertion of one or more weft threads) and in accordance with the properties of the fabric to be made, bringing various warp threads to different heights.
  • jacquard machines are provided with shed forming mechanisms.
  • the shed forming mechanism used must be capable of bringing the warp threads to two, three, four or more different positions.
  • This invention in particular relates to a shed forming mechanism for a jacquard machine which is provided for bringing the warp threads to four different heights.
  • a jacquard machine is called a four-position jacquard machine.
  • This invention more especially relates to a shed forming mechanism for a four-position open-shed jacquard machine.
  • a four-position jacquard machine which is provided for operating according to the open-shed principle the four positions of the warp threads are achievable with each pick. This signifies that a warp thread in each case prior to every pick and irrespective of the height at which this warp thread is can as desired be held at the same height or can be brought to the first, the second, or the third of the three other heights.
  • the Belgian amendment patent no. 529 019 describes (with reference to figure 1) such a shed forming mechanism with a first and a second hook which can be held in a bottom and a top position, a first pulley element with two wheels which is suspended from the second hook, a second pulley element which is connected to a fixed part of the mechanism, and a pulley cord which is attached by one extremity to the first hook, is successively passed round a wheel of the second pulley element and a wheel of the first pulley element, and is connected by the other extremity to warp threads via a harness cord.
  • This mechanism can operate according to the open-shed principle as every jacquard hook operates according to this principle, in other words if each position of each hook can be held or be changed prior to every pick. If the first hook is brought from the bottom to the top position and is moreover brought up over a well-defined height (H), then the harness cord is raised over the same height (H). One and the same raising (H) of the second hook will result in a raising (2 x H) of the harness cord over twice the aforementioned height. If both hooks are raised together over this height (H) then the harness cord is raised over a height (3 x H) which is three times as great.
  • This device is therefore capable of bringing the warp threads to four different heights (0, H, 2 x H, 3 x H), respectively by placing both hooks in their bottom position, only the first hook in its top position, only the second hook in its top position, and both hooks in their top position.
  • BE-529 019 a mechanism is also described (with reference to fig. 2) with two sets of two complementary hooks.
  • the hooks of each set are connected to each other by a respective cord which is passed under the upper wheel of respectively a first and second pulley element with two wheels.
  • a third pulley element is connected to a fixed part.
  • a pulley cord is attached by one extremity to the first pulley element, successively passed round a wheel of the third pulley element and a wheel of the second pulley element and by the other extremity connected to warp threads via a harness cord.
  • four positions can also be obtained according to the open-shed principle.
  • This mechanism also comprises many parts - four hooks and three pulley elements - and is therefore very voluminous and costly.
  • the pulley cord also runs round two wheels resulting in great wear and tear and breakage of the pulley cord.
  • a shed forming mechanism is described with two sets of two complementary hooks, two electromagnetic selection elements, two pulley elements and two reversal wheels in order to create a four-position open-shed jacquard machine.
  • a raising (H) of one of the hooks of the left-hand set causes a raising (2 x H) of the harness cord (fig. 1) which is twice as great.
  • One and the same raising (H) of one of the hooks of the right-hand set causes a raising (H) of the harness cord over the same height.
  • One and the same raising (H) of both hooks causes a raising (3 x H) of the harness cord which is three times as great. This device can therefore generate four positions.
  • the object of this invention is to provide a shed forming mechanism for a four-position jacquard machine without the above mentioned disadvantages of the known mechanisms.
  • This object is achieved by providing a shed forming mechanism with the characteristics mentioned in the first paragraph of this specification, whereby the height difference between the top and the bottom position is greater for one hook than for the other hook.
  • a four-position mechanism can be obtained by passing the height changes from both one and the other hook on to one and the same cord. This is for example possible by means of one pulley element.
  • both hooks are in their bottom position a warp thread working together with the mechanism is in a first position.
  • the aforementioned warp thread comes up to a second height.
  • the hook with the greater height difference between both positions into the top position that warp thread comes up to a third height.
  • the warp thread comes up to a fourth height, since the change in height of the warp thread which is the result of the raising of one hook and the change in height of the warp thread which is the result of the raising of the other hook are combined.
  • This mechanism can therefore be implemented with less parts than the known mechanisms.
  • a mechanism according to this invention can consequently be made for a lower cost price than the existing mechanisms.
  • a jacquard machine with shed forming mechanisms according to this invention can also be built much more compactly than the known mechanisms. Because of the fact that each mechanism also takes up less room large numbers of shed forming mechanisms can be provided next to each other in one and the same jacquard machine without any problem.
  • the mechanism can be so implemented that the pulley cord only has to pass round one wheel, so that the wear and tear of the pulley cord can be appreciably limited.
  • each hook can be engaged by each of two in opposition upwardly and downwardly movable blades so that the position of each hook can be changed during every half movement cycle of the blades.
  • the mechanism according to this invention has a preferred embodiment with a selecting device which is provided in order to move each hook brought into the bottom position either up and down as desired in a non-selection position in which the hook cannot be engaged by a raising means, or to hold it at a fixed height so that the hook takes on a pre-selection position at this fixed height in which the hook is ready to be taken along by an upward moving raising means to the top position, while each hook in a non-selection position can be retained at the fixed height for each cycle of its upward and downward movement in order to bring the hook into the pre-selection position.
  • Such a selecting device operates very efficiently and is quite simple.
  • the selecting device comprises at least one upwardly and downwardly movable motive element provided with at least one wing with a sloping top surface
  • each hook comprises at least one supporting element provided in order to rest on the sloping top surface of a wing of a motive element in order to perform the aforementioned up and down movement in a non-selection position, so that each hook which, being in a pre-selection position, arrives with a supporting element on the sloping top surface of a wing, slides on this sloping surface to a non-selection position.
  • each hook is provided with a protrusion while at least one motive element comprises at least one wing with a sloping underside, so that each hook which, being in a non-selection position, is held at the fixed height, is moved during a downward movement of the motive element to a pre-selection position because of the fact that the aforementioned sloping underside presses against the aforementioned protrusion.
  • Each hook is preferably provided in order to be retained at more than two different heights. This is particularly advantageous if a so-called progressive shed is to be formed. Since the hooks of different shed forming mechanisms have moreover to be capable of being brought to different top and bottom positions.
  • the selecting device for each hook comprises a holding means that can be brought into a holding position or into a non-holding position as desired, while each hook comprises a series of teeth provided one above the other, which can hook into a holding means brought into the holding position.
  • each hook a set of two mutually in opposition upwardly and downwardly movable blades, and a set of two motive elements mutually movable in opposition to and in phase with a respective blade are provided, while these blades and motive elements are so provided that each hook when in its bottom position which is not held at a fixed height, is alternately moved up and down by one and the other motive element of its set in a non-selection position at a rate which is almost twice the rate of the up and down movement of each blade.
  • the mechanism according to this invention is in one of its most preferred embodiments provided with a pulley device which comprises a pulley element with a first and a second wheel, while the hooks are connected to each other by a first cord that is passed round a first wheel of the pulley element, and while a second cord is passed round the second wheel of the pulley element, on the one hand is attached to a fixed part of the mechanism, and on the other hand is provided for the connection to a harness cord on at least one warp thread.
  • a pulley device which comprises a pulley element with a first and a second wheel, while the hooks are connected to each other by a first cord that is passed round a first wheel of the pulley element, and while a second cord is passed round the second wheel of the pulley element, on the one hand is attached to a fixed part of the mechanism, and on the other hand is provided for the connection to a harness cord on at least one warp thread.
  • the second cord is only passed round one wheel and is therefore less subject to wear and tear.
  • This shed forming mechanism comprises two identical, narrow, elongated parts (1), (2), called hooks, which extending almost in vertical direction, can be held in a top and a bottom position, and can be brought from one position to the other position by means of up and down moving blades (13, 14), (15, 16).
  • each hook On the flanks of the hooks (1), (2) directed towards each other a series of sawtooth-shaped protrusions (3), (4) are provided, which extend according to the longitudinal direction of the hook over a specific length of the hook from the upper extremity of the hook.
  • a respective extremity of one and the same cord (21) On the lower extremity of each hook (1), (2) a respective extremity of one and the same cord (21) is attached so that both hooks are connected to each other by means of the cord (21).
  • each hook also comprises a supporting element (5), (6) that forms a protruding nose (40) on both sides of the hook, of which the underside slopes downwards from the flank of the hook.
  • the shed forming mechanism furthermore also comprises a pulley element (22) that principally consists of two wheels (24), (25) which are rotatably attached one above the other to one and the same body (23).
  • the cord (21) that connects both hooks (1), (2) to each other is passed round the upper wheel (24) of the pulley element (22) so that the down-hanging loop formed by the cord (21) carries the pulley element.
  • a pulley cord (26) is attached by one extremity to a fixed part (28) of the mechanism, and is passed round the lower wheel (25) of the pulley element (22).
  • the free part of the pulley cord (26) hanging down from the wheel (25) is connected to a harness cord (27), which in turn is provided for bringing one or more warp threads (not shown in the figure) upwards or downwards.
  • each hook On both sides of each hook (1), (2) an almost horizontally disposed blade (13, 14), (15, 16) is provided.
  • the two blades of each hook can move up and down mutually in opposition along the opposite flanks of the hook.
  • Each blade (13, 14) of one hook (1) moreover moves in phase with a respective blade (15), (16) of the other hook (2).
  • Each blade has a lower edge (41) along the side of the hook (1), (2) working together therewith which slopes upwards in the direction of the hook so that the lower part of each blade has a hook-shaped profile.
  • the edge (41) is provided for supporting the hook working together with the blade.
  • the underside of the nose (40) of the hook directed towards the edge then rests on the edge (41), and the hook is engaged by the blade.
  • the blades (13, 14), (15, 16) of each hook (1), (2) are provided in order to move up and down mutually in opposition between an upper and a lower dead point.
  • the vertical distance (29) between the upper and the lower dead point of the blades is called "the raising" of the blades.
  • the blades (15, 16) of the right hook (2) have a raising (29) which is twice the raising (29) of the blades (13, 14) of the left hook (1).
  • Each hook (1), (2) can be taken along by each of its blades (13, 14), (15, 16) from its bottom position to its top position, or vice versa, during the upward or downward movement of these blades. Between the two positions of each hook (1), (2) there is a difference in height which is almost equal to the raising (29) of the blades which can engage this hook.
  • Each selector has a holding means (9), (10) underneath that can as desired be placed in a holding position (the right holding means (10) in the figure) or in a non-holding position (the left holding means (9) in the figure) by means of an electromagnetic element that can be actuated in order automatically to take on the desired successive positions.
  • Each holding means (9), (10) has a lower hook-shaped part that is provided in order - when the holding means is in the holding position - to retain a respective hook by hooking under one of its sawtooth-shaped protrusions (3), (4).
  • Each hook (1), (2) can with each sawtooth-shaped protrusion (3), (4) rest on a holding means (9), (10) placed in the holding position, so that each hook can be retained at a rather large number of different heights (as many as the number of sawtooth-shaped protrusions). Because of this it is possible to use the mechanism according to this invention for forming a so-called progressive shed, whereby the hooks of different mechanisms, depending on the position of the mechanism in the jacquard machine, must be capable of being retained at different heights.
  • each hook two motive elements (17, 18), (19, 20) are also provided which are movable in opposition up and down along the hook.
  • the motive elements move up and down with an amplitude (z) which is much smaller than the raising (29) of the blades (13, 14) of the left hook.
  • Each motive element moves in phase with a respective blade and is under that blade at every moment during its movements.
  • the upper dead point of each motive element almost corresponds to the lower dead point of the blades.
  • Each motive element has two wings (30) extending sideways in opposite directions which in the direction of their free extremity have an upwardly sloping top surface (31) and an upwardly sloping underside (32).
  • the wing (30) directed towards a hook is provided for supporting this hook.
  • the underside of the nose (40) of the hook directed towards the edge then rests on the aforementioned top surface (31) of this wing (30), and the hook is engaged by the motive element.
  • each hook (1), (2) can either be moved up and down by its two motive elements (17, 18), (19, 20) (like the left hook (1) in the figure), of be retained at a fixed height by the holding element (9, 10) of its selector (7, 8) (like the right hook (2) in the figure).
  • the frequency of motion of the hook is therefore twice the frequency of motion of the blades (13, 14), (15, 16) and of the motive elements (17, 18), (19, 20), and it moves up and down with an amplitude which is almost half the vertical distance (z) between the upper and lower dead point of the motive elements (13, 11), (15, 16).
  • a hook taken along by a motive element (17, 18), (19, 20) is in a non-selection position because of the fact that the hook each time slides down as far as possible with its nose (40) on to the sloping top surface (31) of the wing (30) of the motive element, so that the opposite nose (40) remains out of reach of the edge (41) of the blade moving along that side of the hook.
  • the selector (7), (8) is actuated in order to bring the holding element (9), (10) of the hook into the holding position at the time that the hook (1), (2) is brought by one of its motive elements (17, 18), (19, 20) approximately to the upper dead point of its up and down movement. Because of this the hook (1), (2) with a sawtooth-shaped protrusion (3), (4) will be able to hook on to the hook-shaped extremity of this holding means (9), (10), and remain suspended at a fixed height while the motive element that brought the hook up moves downwards.
  • the holding element (9), (10) When the holding element (9), (10) is placed in its non-holding position the hook (1), (2) will rest on the blade and it will be taken back down. If the holding element (9), (10) remains in the non-holding position the hook (1), (2) arrives with a nose (40) on one of its motive elements (17, 18), (19, 20) and it slides downwards on the sloping top surface (31) of the wing (30) until it is in the non-selection position. If the holding element (9), (10) on the other hand is placed in the holding position the hook continues to be retained, through which it cannot slide down on the sloping top surface (31) of the wing (30), and remains in the pre-selection position, ready to be taken upwards by the next upward movement of a blade.
  • Each hook (1), (2) can therefore after every half movement cycle of the blades (13, 14), (15, 16) be in a bottom and a top position as desired.
  • This mechanism can therefore operate according to the open-shed principle.
  • both hooks (1), (2) are in their bottom position (as shown in the figure)
  • the harness cord (27) is at a first height (I), through which the warp threads (not shown in the figure) come into a first position.
  • the harness cord (27) is at a second height (II), one and the same vertical distance (h) higher than the first height (I). The warp threads then come into a second position.
  • the harness cord (27) is at a third height (III), a vertical distance (2 x h) higher than its bottom position. Because of this the warp threads come into a third position.
  • the harness cord (27) is at a fourth height (IV), a vertical distance (3 x h) higher than in its bottom position. With that a fourth position of the warp threads is obtained.
  • warp threads can therefore be placed as desired in one of four possible positions prior to every insertion of weft threads.
  • This mechanism can therefore be used for the implementation of a four-position open-shed jacquard machine.
  • This four-position jacquard machine can be built compactly and only has two hooks and one pulley device, whereby the pulley cords in each case only run round one reversal wheel just as with the known three-position devices. There are therefore fewer pulley cords subject to wear and tear and the jacquard machine can be built for a lower cost than the known four-position open-shed mechanisms.
  • the mechanism according to this invention can be converted into a three-position open-shed mechanism if the raising (29) of at least one of the blade systems (13, 14), (15, 16) can be so altered that both blade systems operate with one and the same raising (29).

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Load-Engaging Elements For Cranes (AREA)
EP19980201902 1997-06-12 1998-06-08 Vierstellungs-Offenfach-Jacquardmaschine Expired - Lifetime EP0884410B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9700507 1997-06-12
BE9700507A BE1011210A3 (nl) 1997-06-12 1997-06-12 Vierstanden-opengaap-jacquardmachine.

Publications (2)

Publication Number Publication Date
EP0884410A1 true EP0884410A1 (de) 1998-12-16
EP0884410B1 EP0884410B1 (de) 2001-12-19

Family

ID=3890569

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980201902 Expired - Lifetime EP0884410B1 (de) 1997-06-12 1998-06-08 Vierstellungs-Offenfach-Jacquardmaschine

Country Status (4)

Country Link
EP (1) EP0884410B1 (de)
BE (1) BE1011210A3 (de)
DE (1) DE69803007T2 (de)
TR (1) TR199801085A2 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001073177A1 (de) * 2000-03-27 2001-10-04 Textilma Ag Jacquardmaschine
EP1217112A2 (de) * 2000-12-21 2002-06-26 NV Michel van de Wiele Dreistand-Jacquardmaschine
US6858923B2 (en) 1999-08-17 2005-02-22 Applied Materials Inc. Post-deposition treatment to enhance properties of Si-O-C low films
FR2910495A1 (fr) * 2006-12-26 2008-06-27 Staubli Lyon Soc Par Actions S Mecanique d'armure et metier a tisser de type jacquard equipe d'une telle macanique.

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE529019A (de) *
WO1987001142A1 (en) * 1985-08-14 1987-02-26 Lauritsen William E N Device for individual control of yarn guiding means
DE4101778C1 (de) * 1991-01-18 1992-04-02 Fa. Oskar Schleicher, 4050 Moenchengladbach, De
EP0627511A1 (de) * 1993-04-23 1994-12-07 N.V. Michel Van de Wiele Jacquardmaschine
EP0665312A1 (de) * 1994-01-28 1995-08-02 Staubli-Verdol S.A. Fachbildungsmechanismus zur Erzielung von vier Positionen der Kettfäden in einer Webmaschine
EP0723041A1 (de) * 1995-01-17 1996-07-24 N.V. Michel Van de Wiele Dreistand-Offenbach-Jacquardmaschine
EP0736621A1 (de) * 1995-04-04 1996-10-09 N.V. Michel Van de Wiele Dreistand offenfach Jacquardmaschine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE529019A (de) *
WO1987001142A1 (en) * 1985-08-14 1987-02-26 Lauritsen William E N Device for individual control of yarn guiding means
DE4101778C1 (de) * 1991-01-18 1992-04-02 Fa. Oskar Schleicher, 4050 Moenchengladbach, De
EP0627511A1 (de) * 1993-04-23 1994-12-07 N.V. Michel Van de Wiele Jacquardmaschine
EP0665312A1 (de) * 1994-01-28 1995-08-02 Staubli-Verdol S.A. Fachbildungsmechanismus zur Erzielung von vier Positionen der Kettfäden in einer Webmaschine
EP0723041A1 (de) * 1995-01-17 1996-07-24 N.V. Michel Van de Wiele Dreistand-Offenbach-Jacquardmaschine
EP0736621A1 (de) * 1995-04-04 1996-10-09 N.V. Michel Van de Wiele Dreistand offenfach Jacquardmaschine

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6858923B2 (en) 1999-08-17 2005-02-22 Applied Materials Inc. Post-deposition treatment to enhance properties of Si-O-C low films
WO2001073177A1 (de) * 2000-03-27 2001-10-04 Textilma Ag Jacquardmaschine
US6941977B2 (en) 2000-03-27 2005-09-13 Textilma Ag Jacquard machine
EP1217112A2 (de) * 2000-12-21 2002-06-26 NV Michel van de Wiele Dreistand-Jacquardmaschine
EP1217112A3 (de) * 2000-12-21 2002-07-31 NV Michel van de Wiele Dreistand-Jacquardmaschine
BE1013880A3 (nl) * 2000-12-21 2002-11-05 Wiele Michel Van De Nv Driestanden-jacquardmachine.
US6581646B2 (en) 2000-12-21 2003-06-24 N.V. Michel Van De Wiele Three-position-jacquard machine
FR2910495A1 (fr) * 2006-12-26 2008-06-27 Staubli Lyon Soc Par Actions S Mecanique d'armure et metier a tisser de type jacquard equipe d'une telle macanique.
EP1939338A1 (de) * 2006-12-26 2008-07-02 Staubli Lyon Vorrichtung zur Herstellung von Jacquard-Webmustern, und Jacquard-Webmaschine mit einer solchen Vorrichtung
CN101240472B (zh) * 2006-12-26 2011-11-09 施托布利里昂公司 织造机构和配备有这种织造机构的提花机型织机

Also Published As

Publication number Publication date
EP0884410B1 (de) 2001-12-19
DE69803007T2 (de) 2002-05-02
BE1011210A3 (nl) 1999-06-01
TR199801085A2 (xx) 1998-12-21
DE69803007D1 (de) 2002-01-31

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