EP0451895A1 - Rollenantriebsvorrichtung an einer Webmaschine - Google Patents

Rollenantriebsvorrichtung an einer Webmaschine Download PDF

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Publication number
EP0451895A1
EP0451895A1 EP91200673A EP91200673A EP0451895A1 EP 0451895 A1 EP0451895 A1 EP 0451895A1 EP 91200673 A EP91200673 A EP 91200673A EP 91200673 A EP91200673 A EP 91200673A EP 0451895 A1 EP0451895 A1 EP 0451895A1
Authority
EP
European Patent Office
Prior art keywords
connecting piece
roller
shaft
control unit
shaft end
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
EP91200673A
Other languages
English (en)
French (fr)
Other versions
EP0451895B1 (de
Inventor
Henry Shaw
Stefaan Vandersyppe
Bart Lefever
Geert Ostyn
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.)
Picanol NV
Original Assignee
Picanol NV
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 Picanol NV filed Critical Picanol NV
Publication of EP0451895A1 publication Critical patent/EP0451895A1/de
Application granted granted Critical
Publication of EP0451895B1 publication Critical patent/EP0451895B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D03D49/04—Control of the tension in warp or cloth
    • D03D49/06—Warp let-off mechanisms

Definitions

  • the present invention relates to a device for driving a roller on a weaving machine.
  • the device is intended primarily for driving a beam.
  • the device according to the invention may however also be used for driving a canvas roller or other elements.
  • Such a device has the disadvantage that the coupling usually leaves play, because the shafts of the gear wheels are never at the ideal distance. Another disadvantage is that the presence of the coupling can hinder the automatic placement of the beam on the weaving machine, and more particularly when two teeth of the respective gears face each other.
  • the beams used in this type of known device also have the disadvantage that the toothed wheel must be removed before the flange on this side of the beam can be removed. When reassembling the assembly, care must be taken to reassemble the toothed wheel at the precise place where it can mesh with the toothed wheel mounted on the weaving machine and driven by a motor.
  • toothed wheel on the beam also has the effect of making it more difficult to transport the beam by means of a transport device.
  • this toothed wheel can be damaged during transport. Due to the presence of this toothed wheel, it is also necessary to use a beam having a large axial length.
  • the present invention relates to a device for driving a roller on a weaving machine which does not offer the disadvantages listed above.
  • the invention provides a device for driving a roller on a weaving machine which makes it possible to engage the roller with the drive in all circumstances, whatever the angle of entry of the roller into the weaving machine.
  • the invention also relates to a device for driving a roller on a weaving machine which enables the roller to be easily and automatically coupled with the drive, the coupling being obtained by engagement of the drive motor.
  • the invention relates to a device for driving a roller on a weaving machine, which consists of a control unit, in fixed mounting on the weaving machine, intended to drive the roller, and coupling means for coupling the roller to the control unit, characterized in that the coupling means consist of a shaft end driven by the control unit; a shaft end secured to the roller; a connecting piece for coupling the ends of the shafts mentioned above, movable in the axial direction relative to the ends of the shafts; optionally devices necessary for the axial movement of the connecting piece; and means making it possible to connect the two ends of the shaft by means of the connecting piece by the rotation of the end of the shaft driven by the control unit.
  • the device intended for axial displacement of the connecting piece consists of threaded elements working in interaction and / or of elastic devices such as a pressure spring.
  • the means making it possible to connect the two ends of the shaft to each other by means of the connecting piece will preferably be composed of threaded elements interacting with each other.
  • the coupling means mentioned above consists of the combination of the following: a shaft end driven by the control unit, such as a motor; a shaft end fixed to the roller, provided with a threaded element; a fixed part also provided with a threaded element; a connecting piece, movable in the axial direction but not rotating, mounted on the end of the shaft driven by the control unit and provided with two threaded elements which can interact respectively with the threaded element of the fixed part and the threaded element of the shaft end of the roller as well as of devices forming a stop limiting the travel of the movable connecting piece towards the shaft end of the roller, the connecting piece being disconnected from the fixed part in the position where the devices forming above mentioned stopper interact with each other.
  • Figure 1 shows a schematic view of a weaving machine 1 on which is installed a roller 2, in this case a beam, driven by a device 3 according to the invention.
  • roller 2 is provided with flanges 4 between which the warp threads 5 are wound. It also has ends shaped at the end of the shaft 6 and 7 on which it rests on each side.
  • the drive device 3 of the roller 2 is composed of a control unit 8, such as a motor, mounted on the weaving machine 1, and coupling means 9 which can connect the roller 2 to the control unit 8.
  • the coupling means 9 used are composed of the following elements: a shaft end 10 driven by the control unit 8; a shaft end 11 fixed to the roller 2 and provided with a threaded element 12; a fixed part 13 also provided with a threaded element 14; and a connecting piece 15, movable in the axial direction but not rotating, mounted on the shaft end 10 mentioned above and provided with two threaded elements 16 and 17 which can interact respectively with the threaded element 14 of the part fixed 13 and the threaded element 12 of the shaft end 11 of the roller 2.
  • the connecting piece 15 is here also provided with a device forming a stop which limits the travel of this connecting piece 15 towards the shaft end 11 of the roller 2, this device being formed, for example, of shoulders 18 and 19 interacting with each other and fixed, respectively, to the connecting piece 15 and to the shaft end 10 driven by the control unit 8, so that when the shoulders 18 and 19 come into contact with one another, the connecting piece 15 is decoupled from the fixed part 13.
  • the two shaft ends 10 and 11 to be coupled are preferably provided with clamping elements which can interact with each other and allow the transmission of a high torque from the control unit 8 to the roller 2.
  • these clamping elements are composed of a conical cutout 20 in the front 21 of the shaft end 11 and a conical projection 22 on the front 23 of the shaft end 10. None prevents the projection from being provided 22 at the end of the shaft 11 and the cutout 20 at the end of the shaft 10.
  • FIGS. 2 to 4 will be preferred because a cutout 20 is less likely to be damaged during transport of the roller. 2 than a projection 22.
  • the connecting piece 15 will preferably be an annular piece placed concentrically around the shaft end 10 and capable of sliding on the shaft end 10 by means of the keyways 24 and 25, formed in the shaft end 10 , on the one hand, and, on the other hand, in the inner wall 26 of the connecting piece 15, and at least one key 27.
  • the threaded elements 12 and 17, interacting with each other, comprise, on the one hand, an external thread on the shaft end 11, and, on the other hand, an internal thread in the cylindrical connecting piece 15.
  • the threaded elements 14 and 16, interacting with each other comprise, on the one hand, an internal thread in the fixed part 13, and, on the other hand, an external thread on the connecting piece 15.
  • the lengths L1 and L2 of the threaded elements 14 and 16, as well as the stroke L3 over which the connecting piece 15 can move in the axial direction, will preferably be chosen such that the threaded element 16 may, under the effect of the axial displacement of the piece of link 15, be brought entirely on one side as on the other of the threaded element 14, as illustrated in FIGS. 2 and 4 respectively.
  • the device also has means which force the connecting piece 15, at least in the position where it is fully engaged on the shaft end 10, in a specific direction, so that the threaded elements 14 and 16 remain positioned l one against the other.
  • these means are a spring system, for example a leaf spring 28, fixed on the front of the connecting piece 15 and bearing on the frame 29.
  • the pitch of the threaded elements 12 and 17 is greater than or equal to the pitch of the threaded elements 14 and 16. As will be explained below, preference will be given to an execution in which the pitch of the threaded elements 12 and 17 is greater than that of the threaded elements 14 and 16.
  • the device 3 is also provided with locking means 30 making it possible to prohibit the rotation of the roller 2 in at least one determined direction.
  • these blocking means 30 consist of cutouts 31 arranged around the periphery of the end 6 of the roller 2 and of a blocking element 32 fixed in pivoting mounting to the fixed part 13 of the frame 29 and which can interact with any of the cutouts 31.
  • the blocking element 32 can be removed by a snap mechanism 33, then keeping the blocking element 32 in position noted.
  • the blocking element 32 is preferably executed in the form of a cleat comprising a bevel 34, so that the roller 2 can rotate in one direction but not in the other. In the position where the locking element 32 is engaged, the roller 2 can only be rotated in the direction where the coupling means 9 are tightened.
  • the roller 2 has at its end 6 two grooved guides 35 and 36, the first guide 35 being intended to interact with an arm 37 of a transport device and the second guide 36 being intended to interact with a support 38, on the weaving machine 1, on which the end 6 of the roller 2 can be deposited and by which the roller 2 can be brought in its place.
  • the guide 36 has a length L4 sufficient to allow the axial displacement of the roller 2 over a determined distance on the support 38.
  • this bearing may consist, for example, of a U-shaped cutout 39 in the frame 29 and d 'a locking element 40 to hold the end 7 in the cutout 39.
  • the guide 36 mentioned above is preferably located outside of a ring 41 screwed with bolts 42 on the shaft end 11, so that this guide 36 is placed concentrically around the threaded element 12 and that the connecting piece 15 has ample play in the ring 41.
  • This construction offers the advantage of limiting the axial length of the shaft end 11 to a minimum.
  • the free end of the ring 41 is is thus placed substantially at the level of the front 21 of the end of the shaft 11.
  • the drive of the shaft end 10, as illustrated in FIG. 1 can be carried out by means of a gear transmission 43 which, unlike the conventional assemblies of beams, can be mounted permanently in a casing 44.
  • a gear transmission 43 which, unlike the conventional assemblies of beams, can be mounted permanently in a casing 44.
  • the shaft end 10 is driven by the control unit 8 so that the threaded element 16 engages in the threaded element 14, thereby sliding the connecting piece 15 towards the roller 2.
  • the threaded element 17 engages in the threaded element 12, creating a situation shown in FIG. 3. It should be noted here that before the engagement of the threaded elements 12 and 17, the shaft ends 10 and 11 can form any angle.
  • threaded elements 12 and 17 will preferably be self-tightening, thus allowing, at the end of the tightening of the coupling means 9, to drive the roller 2 in both directions by means of the control 8. It is clear that the coupling will be free of play.
  • the support 38 will preferably be at a height such that the shaft end 11, and more particularly the guide 36, is detached from the support 38 when the projection 22 is tightened in the cutout 20 , thus allowing the support 38 to no longer act as a bearing.
  • the distance over which the shaft end 11 is moved in height can be limited. It is clear that for this purpose, the threaded elements 12 and 17 have a sufficient reciprocal radial clearance and that the centering of the shaft end 11 relative to the shaft end 10 is effected here thanks to the interaction of the conical projection 22 with conical cutout 20.
  • the roller 2 is first locked to prevent the rotary movement by engaging the locking element 32 in one of the cutouts 31, more particularly as illustrated in broken lines in FIG. 4.
  • This can be achieved, for example, by bringing the locking element 32 against the ring 41 and by driving the shaft end 10 in the opposite direction to the direction of rotation causing the tightening of the roller 2, until this element blocking 32 engages in a cutout 31 under the action of the spring 45.
  • the shaft end 10 is driven further in this direction of counter-rotation; as the roller 2 is locked to prevent it from rotating, the connecting piece 15 will disengage from the threaded element 12 as a result of the interaction of the threaded elements 12 and 17.
  • the threaded elements 14 and 16 will also engage with each other.
  • the connecting piece 15 comes to occupy the position illustrated in FIG. 2, the element threaded 16 being released from the threaded element 14.
  • the end 46 of the connecting piece 15 will be, in the position described above, preferably at the height of the projection 22, so as not to constitute a hindering obstacle during the withdrawal of the roller 2.
  • the effect of the leaf spring 28 is that by reversing the direction of rotation of the shaft end 10, the element threaded 16 engages again in threaded element 14.
  • the threaded elements 12 and 17, as well as the threaded elements 14 and 16 may have square threads. These threaded elements will preferably have a relatively large pitch and can be executed, for example, with a multiple thread. These threaded elements are preferably threaded so as to have sufficient axial play, to facilitate the coupling of these threaded elements. It is clear that the pitch of the threaded elements cannot be chosen too large in relation to the diameter of these threaded elements, so as to allow self-tightening of the threads.
  • end of the shaft 11 can form a one-piece assembly with the roller 2 and that the ring 41 can form a one-piece assembly with the end of the shaft 11.
  • FIG. 6 represents a variant in which the threaded element 12, in the ring 41, mentioned above, has an internal thread and the threaded element 17, on the connecting piece 15, an external thread.
  • the threaded elements 12 and 17 can have a conical thread. This has the advantage that, if the shaft end 11 of the roller 2 and the shaft end 10 are not exactly placed in line, the two shaft ends will align automatically during coupling. Furthermore, it thus becomes possible to lift the roller 2 from the support 38 during the tightening of the coupling means 9.
  • the means for moving the connecting piece 15 in the axial direction consist essentially of a spring 47, which forces the connecting piece 15 towards the end of shaft 11.
  • This spring 47 can cause the connection piece 15 to slide over its entire stroke, that is to say until the shoulders 18 and 19 come into contact with one another.
  • the threaded elements 14 and 16 then have the function of retaining the connecting piece 15 in the retracted position when the coupling is undone.
  • these threaded elements 14 and 16 allow the connecting piece 15 to disengage at the rear of the threaded element 14 when the shaft end 10 rotates, which, finally, has so that the spring 47 mentioned above can move the connecting piece 15 towards the end of the shaft 11.
  • the spring 47 also fulfills the function entrusted to the spring 28 in the embodiment illustrated in FIG. 2.
  • the threaded elements 14 and 16 may optionally be replaced by other locking means intended to retain the connecting piece 15 in the position where it is fully slid over the shaft end 10.
  • the aforementioned spring 47 can also be replaced by other devices, such as for example a pneumatic cylinder, which make it possible to move the connecting piece 15 in the direction described above.
  • other means can be used, such as for example a pneumatic piston, to slide the connecting piece 15 entirely on the shaft end 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Jib Cranes (AREA)
  • Rolls And Other Rotary Bodies (AREA)
EP19910200673 1990-04-13 1991-03-26 Rollenantriebsvorrichtung an einer Webmaschine Expired - Lifetime EP0451895B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9000416A BE1003988A3 (nl) 1990-04-13 1990-04-13 Inrichting voor het aandrijven van een boom bij een weefmachine.
BE9000416 1990-04-13

Publications (2)

Publication Number Publication Date
EP0451895A1 true EP0451895A1 (de) 1991-10-16
EP0451895B1 EP0451895B1 (de) 1994-06-22

Family

ID=3884756

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910200673 Expired - Lifetime EP0451895B1 (de) 1990-04-13 1991-03-26 Rollenantriebsvorrichtung an einer Webmaschine

Country Status (3)

Country Link
EP (1) EP0451895B1 (de)
BE (1) BE1003988A3 (de)
DE (1) DE69102573T2 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0557752A1 (de) 1992-02-27 1993-09-01 Picanol N.V. Geteilte Webmaschine
BE1006485A3 (nl) * 1992-12-01 1994-09-13 Picanol Nv Inrichting voor het aandrijven van een element bij weefmachines.
EP0666345A1 (de) * 1994-02-02 1995-08-09 Picanol N.V. Vorrichtung zum Anbringen eines Antriebselementes auf einer Kettbaumwelle bei einer Webmaschine
EP0882823A2 (de) * 1997-06-07 1998-12-09 Lindauer Dornier Gesellschaft M.B.H Kettbaumkupplung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1232740A (fr) * 1959-08-11 1960-10-11 Webstuhlbau Karl Marx Stadt Dispositif de support d'ensouples de chaîne et de tissu dans les métiers à tisser

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1232740A (fr) * 1959-08-11 1960-10-11 Webstuhlbau Karl Marx Stadt Dispositif de support d'ensouples de chaîne et de tissu dans les métiers à tisser

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0557752A1 (de) 1992-02-27 1993-09-01 Picanol N.V. Geteilte Webmaschine
BE1006485A3 (nl) * 1992-12-01 1994-09-13 Picanol Nv Inrichting voor het aandrijven van een element bij weefmachines.
EP0666345A1 (de) * 1994-02-02 1995-08-09 Picanol N.V. Vorrichtung zum Anbringen eines Antriebselementes auf einer Kettbaumwelle bei einer Webmaschine
BE1008057A3 (nl) * 1994-02-02 1996-01-03 Picanol Nv Inrichting voor het aan elkaar bevestigen van een element en een kettingboom bij weefmachines.
US5511586A (en) * 1994-02-02 1996-04-30 Picanol N.V. Device for affixing a drive element to a loom warp beam shaft
EP0882823A2 (de) * 1997-06-07 1998-12-09 Lindauer Dornier Gesellschaft M.B.H Kettbaumkupplung
EP0882823A3 (de) * 1997-06-07 1999-12-01 Lindauer Dornier Gesellschaft M.B.H Kettbaumkupplung

Also Published As

Publication number Publication date
DE69102573D1 (de) 1994-07-28
BE1003988A3 (nl) 1992-07-28
EP0451895B1 (de) 1994-06-22
DE69102573T2 (de) 1994-10-06

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