EP0138895B1 - Antriebsvorrichtung für einen zwischen ein rollenpaar mit rillen geklemmten steifen draht - Google Patents

Antriebsvorrichtung für einen zwischen ein rollenpaar mit rillen geklemmten steifen draht Download PDF

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Publication number
EP0138895B1
EP0138895B1 EP84901199A EP84901199A EP0138895B1 EP 0138895 B1 EP0138895 B1 EP 0138895B1 EP 84901199 A EP84901199 A EP 84901199A EP 84901199 A EP84901199 A EP 84901199A EP 0138895 B1 EP0138895 B1 EP 0138895B1
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EP
European Patent Office
Prior art keywords
pressure
jack
slide
roller
frame
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.)
Expired
Application number
EP84901199A
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English (en)
French (fr)
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EP0138895A1 (de
Inventor
René GRENON
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Publication of EP0138895A1 publication Critical patent/EP0138895A1/de
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Publication of EP0138895B1 publication Critical patent/EP0138895B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/02—Rotary devices, e.g. with helical forwarding surfaces
    • B65H51/04—Rollers, pulleys, capstans, or intermeshing rotary elements
    • B65H51/08—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate in groups or in co-operation with other elements
    • B65H51/10—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate in groups or in co-operation with other elements with opposed coacting surfaces, e.g. providing nips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B13/00—Bundling articles
    • B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B65B13/22—Means for controlling tension of binding means

Definitions

  • the invention relates to a device for driving in its longitudinal direction a rigid wire moved by two rollers between which it is clamped.
  • Devices of this type are already known, in particular for driving metal wires in many machines, for example in machines for bundling various articles, which are linked together using a stretched metal wire and then knotted by a twist of its ends.
  • the wire is driven by the friction which exists between it and the groove of a drive roller in which it is clamped by a pressure roller.
  • this wire is tightened by the pressure roller with a force which is greater than the product of the resistant driving force by the coefficient of friction of the wire in the groove of the roller engine.
  • the resistance of the wire to the drive is variable, we adopt for safety its maximum foreseeable value to determine the clamping force exerted by the pressure roller. As a result, the device operates frequently with an excessive clamping force which is detrimental to performance and which is the cause of faster wear of the parts.
  • the main object of the invention is to provide a device for driving a rigid wire clamped between two rollers with which the clamping force produced by the pressure roller is constantly maintained at a value just necessary for the proper driving of this wire.
  • a device for driving a rigid wire comprises a pressure roller mounted to rotate freely at a fixed position on a frame; a receiving pulley locked in rotation with a grooved roller cooperating with the pressure roller is mounted to rotate freely on the same frame, a motor group with a driving pulley is supported from this frame, a belt joins this driving pulley and the receiving pulley of the grooved roller, an elastic member exerts on the pivoting arm a force of approach of the grooved roller and the pressure roller in correspondence with a minimum value of the clamping force exerted by the pressure roller on the grooved roller.
  • the receiving pulley and the grooved roller are mounted on an arm pivoting freely relative to the frame and the power unit is supported by a parallelogram articulated relative to the same frame.
  • a jack is arranged between the motor unit and a fixed point of the frame to act in the direction of approaching or moving away from the pressure roller and the grooved roller.
  • the pressure chamber of this jack is connected by a channel to a distributor connected to a hydraulic circuit of fluid under low pressure and to a hydraulic circuit of fluid under high pressure.
  • a drawer mounted in this distributor can occupy a first extreme position putting the cylinder in communication with the fluid circuit under low pressure, a second extreme position putting the cylinder in communication with the fluid circuit under high pressure, a neutral intermediate position isolating the cylinder of both circuits.
  • This drawer is pushed to one of its ends by a relatively weak constant force pressing it by its opposite end against the carrying axis of the receiving pulley.
  • the distributor drawer In the balanced operating position of the assembly, for the drive between the rollers of a wire of a given diameter, the distributor drawer is pressed against the axis of the receiving pulley, however it found in its neutral intermediate position. In this state, the pressure of the fluid in the chamber of the jack is that which corresponds to the tension of the belt just necessary for the proper tightening of the wire driven between the grooved roller and the pressure roller.
  • any variation in the diameter of the wire corresponds to a relative displacement of the grooved roller with respect to the pressure roller, as well as a displacement of the distributor drawer towards one of its extreme positions.
  • the cylinder receives or loses fluid and the motor unit moves relative to the frame until the drawer returns to its neutral intermediate position.
  • the assembly comprising the motor unit, the receiving pulley and the grooved roller is moved relative to the frame, therefore relative to the pressure roller, while the distance between the motor unit and the drive pulley keeps a constant value.
  • a means of counting the number of turns of the grooved roller is incorporated in the device of the invention.
  • This means can be arranged on the grooved roller itself or on any other part rotating at the same time as it, with a constant ratio.
  • the counting means is incorporated in the motor unit.
  • the signals provided by this counting means are useful for monitoring any malfunction: accidental blocking of the device, exit of the wire from its guide, etc., for more precise control of the operation: slowing down before stopping. predetermined thread, as well as for checking the wear of parts and the execution of various. maintenance operations.
  • the device of the invention comprises conventional members which it is not necessary to describe in detail.
  • a pressure roller 2 is mounted to rotate freely, at a fixed location.
  • This roller cooperates for the drive of a rigid wire with a grooved roller 3 on a part 4 of a path 5 for passage of the wire which must be pushed in the direction indicated by an arrow F in FIG. 1.
  • the roller grooved 3 is locked in rotation with a receiving pulley 6 which is connected by a toothed belt 7, or by a chain, to a driving pulley 8 fixed in rotation on the shaft of a power unit 9.
  • This power unit 9 has with the driving pulley 8 a common geometric axis 10; the receiving pulley 6 has with the grooved roller 3 a common geometric axis 11. Between these two geometric axes 10, 11 there is a distance L to which corresponds the normal operating tension of the belt 7.
  • the receiving pulley 6 and the grooved roller 3 are mounted to rotate freely on an axis 12 (coaxial with the geometric axis 11) which is itself carried by an arm 13 mounted to pivot freely at 14, relative to the frame 1.
  • the motor unit 9 and the driving pulley 8 are supported by two branches of an articulated parallelogram itself mounted free in pivoting, at 15 and 16, relative to the frame 1. Consequently, the assembly of the motor group 9, the driving pulleys 8, the receiving pulley 6 and the grooved roller 3 can pivot relative to the pressure roller 2 in a fixed position, without changing the length L between the geometric axes 10, 11 except for slight variations due to operating clearances, bending of the parts, low elasticity of the belt 7.
  • the arm 13 which carries the axis 12 of the grooved roller 3 also supports a lateral extension 17, which is preferably an extension of this axis 12, parallel to the power unit 9. On the latter is fixed, in the direction of the lateral extension 17 , a body 18 which is common to a jack 19 and to a distributor 20.
  • the cylinder 19 is of the single-acting type; it has a piston 21 which comes out to be applied against the frame 1 opposite to a pressure chamber 22 situated on the side of the motor unit 9. It is clear that any higher pressure produced in the chamber 22 of the jack 19 forces the entire motor unit 9, pulleys 8, 6 and the grooved roller 3 to move in the direction of bringing the grooved roller 3 closer to the pressure roller 2. Conversely, any reduction in pressure in the chamber 22 of the cylinder 19 allows the same assembly to move in the direction of the separation of the grooved roller 3 relative to the pressure roller 2. Any constant pressure, to any value, of the fluid inside the chamber 22 of the cylinder 19 is opposed to any additional spacing of the grooved roller 3 and the pressure roller 2. This constant value of the pressure may be zero. Any increase in this spacing is made impossible except to the extent permitted by the operating clearances, the seepage of the fluid, the “compressibility of this fluid although it is a theoretically incompressible hydraulic fluid.
  • the value of the constant pressure in the jack 19 determines the force with which the two rollers 3 and 2 are applied against each other, empty, in the absence of wire between them. If a pressure of low value but insufficient to produce the necessary force is chosen, for a reason which will appear later, the two rollers 3 and 2 are kept in contact using a tension spring 23 arranged for example between the frame 1 and the free terminal end of the arm 13 which is extended above the axis 12 of the receiving pulley 6.
  • the chamber 22 of the jack 19 communicates by a T-shaped channel 24 formed in the piston 21 with a corresponding channel 25 drilled in the distributor 20, and leading to an internal volume 26.
  • the latter is traversed by a distribution drawer 27 (FIG. 3 ) which has an end portion 28 playing the role of a piston in a jack 29 so that its opposite end 30 is constantly held applied against the free end of an adjustment screw 31. This is screwed in the extension side 17, towards the power unit 9.
  • a channel 32 of a fluid under low pressure and a channel 33 of a fluid under high pressure arrives via a pipe 34 which is also joined by a channel 35 to the jack 29.
  • the drawer 27 In its middle part located between the channels 32, 33, the drawer 27 has a diametrical narrowing 36. It can occupy three positions. In a first extreme position, it discovers the channel 32 and allows the fluid of the pressure chamber 22 of the jack 19 to pass from the channel 25 to the channel 32 using the T-channel 24. In a second extreme position, the drawer 27 discovers the channel 33 and allows the pressurized fluid to pass from the channel 33 to the channel 25 then into the pressure chamber 22 of the jack 19. In an intermediate position or neutral position, at which it is found in FIGS. 1 and 3, the drawer 27 closes the channels 32 and 33 so that it isolates the chamber 22 of the jack 19 from these channels.
  • the device of the invention operates as follows.
  • the adjustment is made, using the adjusting screw 31, as a function of the pressure chosen to be constant in the pressure chamber 22 of the jack 19, so that the center distance L is at its normal value and that the distributor 27 is in its neutral position.
  • the spring 23 applies the rollers 2, 3 against each other with a force which can be weak enough so that the introduction between them of a wire pushed by hand can be done easily.
  • the tension exerted by the belt 7 tends to decrease while bringing the roller 3 closer to the roller 2, which corresponds to a displacement of the mobile assembly during which the drawer 27 which is stopped by the screw 31 against which it is pushed by its jack 29 undergoes a relative displacement towards its second extreme position. It puts the chamber 22 of the jack 19 into communication with the channel 33 and the high pressure circuit, so that the piston 21 remains pressed against the frame 1 and that the pressurized fluid contributes to the movement in progress. This movement is interrupted when the drawer 27 is again in its neutral position. In other words, the slide 27 is disturbed from its neutral intermediate position each time the distance L between the geometric axes 10, 11 tends to take another value. It is disturbed in a direction such that it intervenes on the fluid contained in the jack 19 in a corrective manner. The jack 19 then acts in the direction of restoring the distance L of this center distance.
  • the weight of the power unit 9 does not intervene; it is negligible in comparison with the tensile force exerted by the belt 7.
  • the device can therefore operate in any position.
  • the direction of rotation of the rollers 2, 3 also has no influence on the state of equilibrium of the device, so that the latter operates equally in the two directions of advance and retreat of the driven wire.
  • the support of the piston 21 against the frame is established automatically in direct proportion to the dynamic tension of the belt, however the center distance L keeps a constant value since the position in equilibrium of the piston 21 in the movable assembly is always the same.
  • two stop screws 38, 29 are mounted on the body 18 of the jack 19 and of the distributor 27 which are arranged to cooperate, in opposite directions, with corresponding stop faces 40, 41 provided on the lateral extension 17 of axis 12.
  • the position adjustment which is automatically established at the necessary value means that the parts of the device are not subjected to unnecessarily exaggerated stresses and that no sliding is to be feared. Consequently, it is possible and advantageous, within the framework of the invention, to incorporate into the device a means of counting the number of revolutions of the grooved roller, or of a rotating part with which it is linked in rotation, as the motor unit 9. This means can be of any type known per se. It brings considerable advantages to the use of the device of the invention. At a given diameter of the entrained wire, the length of the wire effectively displaced corresponds to a determined number of turns of the grooved roller 3.
  • the drawer 27 of the distributor 20 could be pushed by a spring replacing the jack 29. In this case, its position could be more easily reversed, its end 30 being held pressed against the motor unit 9 and the spring being interposed between the extension 17 and the drawer 27.
  • the jack 19 could be of the double-acting type and supplied accordingly by an appropriate distributor so that it plays the role described above.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Manipulator (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Claims (9)

1. Antriebsvorrichtung für einen steifen Draht mit einer an einem Rahmen (1) frei drehbar gelagerten Anpreßrolle (2), mit einer mit der Anpreßrolle (2) zur Mitnahme des Drahtes zusammenwirkenden, auf einer Achse (12) frei drehbar gelagerten und drehfest mit einer Aufnahmerolle (6) verkeilten Nutenrolle (3), mit einem die Aufnahmerolle (6) mit einer Antriebsscheibe (8) eines Motoraggregats (9) verbindenden Riemen (7) und mit einem elastischen Organ (23), welches bestrebt ist, die beiden Rollen (2. 3) gegeneinander abzustützen, dadurch gekennzeichnet, daß die Aufnahmerolle (6) und die Nutenrolle (3) auf einem bezüglich des Rahmens (1) frei schwenkbaren Arm (13) gelagert sind, daß das Motoraggregat (9) auf einem bezüglich des Rahmens (1) frei schwenkbar angelenkten Parallelogramm gelagert ist, daß zwischen dem Rahmen (1) und dem Motoraggregat (9) ein Arbeitszylinder (19) angeordnet ist, der durch seinen Kolben (21) im Sinne einer gegenseitigen Annäherung oder Entfernung der Rollen (2, 3) gegen den Rahmen (1) wirkt, daß der Arbeitszylinder (19) durch Zwischenschaltung eines Verteilers (20) funktionell mit einem ein Medium unter schwachem Druck enthaltenden Hydraulikkreis oder einem ein Medium unter erhöhtem Druck enthaltendem Hydraulikkreis verbunden ist, daß der Verteiler (20) einen beweglichen Steuerschieber (27) aufweist, dessen Relativstellung durch den Abstand zwischen der geometrischen Achse (10) des Motoraggregats (9) und der geometrischen Achse (11) der Aufnahmerolle (6) bestimmt ist, und daß die Neutralstellung dieses Steuerschiebers (27) einem vorbestimmten Wert (L) dieses Achsabstandes (10, 11) entspricht.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Verteiler (20) zwischen dem Motoraggregat (9rund einer seitlichen Erweiterung (17) des schwenkbaren, die Aufnahmerolle (6) und die Nutenrolle (3) tragenden Armes (13) angeordnet ist, und daß ein Endteil (28) des Steuerschiebers (27) ständig einer Kraft unterliegt, die den Steuerschieber in Kontakt gegen eines der beiden Teile : Motoraggregat (9) - seitliche Erweiterung (17) drückt.
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die seitliche Erweiterung (17) diejenige der Achse (12) der Nutenrolle (3) ist, und der Steuerschieber (27) in Kontakt gegen eine Regulierschraube (31) gehalten ist, die auf diese seitliche Erweiterung (17) aufgeschraubt ist.
4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Arbeitszylinder (19) ein einfach wirkender Zylinder ist, und daß dann, wenn der Steuerschieber (27) in seiner Neutralstellung ist, die Druckkammer (22) des Arbeitszylinders (19) derart verschlossen ist, daß sein Kolben (21), der gegen den Rahmen (1) angelegt gehalten ist, sich jeder Bewegung widersetzt, die bestrebt ist, die beiden Rollen (2, 3) voneinander zu entfernen.
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Druckkammer (22) ein Medium mit einem solchen Druckwert enthält, der ausreicht, die beiden Rollen (2, 3) in Abwesenheit des Drahtes zwischen ihnen gegeneinander anzulegen.
6. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Druckkammer (22) ein Medium mit einem solchen Druckwert enthält, der nicht ausreicht, die beiden Rollen (2, 3) in Abwesenheit des Drahtes zwischen ihnen gegeneinander anzulegen, und daß in diesem Falle eine Feder (23) zwischen dem Rahmen (1) und dem schwenkbaren Arm (13) angeordnet ist, um die Annäherung hervorzurufen.
7. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Steuerschieber (27) beidseits seiner Neutralstellung eine erste Extremstellung einnehmen kann, in welcher er die Kammer (22) des Arbeitszylinders (19) in Verbindung mit einem Kanal (32) des ein Medium unter schwachem Druck enthaltenden Kreises setzt, sowie eine zweite Extremstellung, in welcher er diese Kammer (22) in Verbindung mit einem Kanal (34) des ein Medium unter erhöhtem Druck enthaltenden Kreises setzt, und daß der Steuerschieber (27) bestrebt ist, seine zweite Stellung einzunehmen, sobald sich die Nutenrolle (3) der Anpreßrolle (2) nähert und der Abstand (L) zwischen den Achsen (10, 11) abnimmt, und seine erste Stellung einzunehmen, sobald die Nutenrolle (3) sich von der Anpreßrolle (2) entfernt und der Abstand (L) zwischen den Achsen (10, 11) zunimmt.
8. Vorrichtung nach den Ansprüche 3 oder 6, dadurch gekennzeichnet, daß der Endteil (28) des Steuerschiebers (27), der dem in Kontakt mit der Regulierschraube (31) gehaltenen Ende (30) gegenüberliegt, einen Kolben eines Arbeitszylinders (29) bildet, der durch den gleichen, unter erhöhtem Druck stehenden Kreis gespeist ist, wie die Kammer (22) des Arbeitszylinders (19).
9. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Nutenrolle (3) oder einer der Teile, die mit ihr drehschlüssig verbunden sind, wie beispielsweise das Motoraggregat (9) mit einem Mittel zur Zählung der Umläufe versehen ist.
EP84901199A 1983-03-16 1984-03-15 Antriebsvorrichtung für einen zwischen ein rollenpaar mit rillen geklemmten steifen draht Expired EP0138895B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8304305 1983-03-16
FR838304305A FR2542719B1 (fr) 1983-03-16 1983-03-16 Dispositif d'entrainement d'un fil rigide serre entre deux galets a gorge

Publications (2)

Publication Number Publication Date
EP0138895A1 EP0138895A1 (de) 1985-05-02
EP0138895B1 true EP0138895B1 (de) 1986-12-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP84901199A Expired EP0138895B1 (de) 1983-03-16 1984-03-15 Antriebsvorrichtung für einen zwischen ein rollenpaar mit rillen geklemmten steifen draht

Country Status (10)

Country Link
US (1) US4629105A (de)
EP (1) EP0138895B1 (de)
JP (1) JPS60500526A (de)
AU (1) AU567739B2 (de)
BR (1) BR8406448A (de)
DE (1) DE3461774D1 (de)
FR (1) FR2542719B1 (de)
IT (1) IT1173827B (de)
SU (1) SU1268102A3 (de)
WO (1) WO1984003688A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9100028A (nl) * 1991-01-10 1992-08-03 Hoogovens Groep Bv Draadtransportinrichting.
US5384945A (en) * 1993-04-21 1995-01-31 United States Surgical Corporation Device for forming drilled needle blanks
US8701555B2 (en) 2012-04-25 2014-04-22 Illinois Tool Works Inc. Tension head for modular steel strapping machine
US9651053B2 (en) * 2014-01-24 2017-05-16 Pratt & Whitney Canada Corp. Bleed valve

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE664993C (de) * 1934-05-09 1938-09-10 Eduard Meyer Selbsttaetige hydraulische Nachstellvorrichtung fuer Walzwerke
US3093285A (en) * 1959-04-28 1963-06-11 M & T Chemicals Inc Electrode feeding mechanism for welding apparatus
US3396888A (en) * 1966-09-15 1968-08-13 Henry V. Rygiol Wire feeder
DE1777022C3 (de) * 1968-08-23 1975-06-12 Usm Corp. (N.D.Ges.D.Staates New Jersy), Boston, Mass. (V.St.A.) Hydraulische Nachstellvorrichtung für Walzgerüste
US3675837A (en) * 1970-09-03 1972-07-11 Weld Motion Inc Wire feeder
US3657940A (en) * 1970-11-19 1972-04-25 William S Wagner Adjustable roll drive
AU478287B2 (en) * 1972-07-26 1974-11-28 Evola Industries Limited wire TENSIONING DEVICE
DE2338583C3 (de) * 1973-07-30 1978-12-21 Bosch-Siemens Hausgeraete Gmbh, 7000 Stuttgart Einrichtung zum Transportieren eines Umreifungsbandes
AT349861B (de) * 1976-05-25 1979-04-25 Evg Entwicklung Verwert Ges Bindewerkzeug zum verdrillen der freien enden eines bindedrahtes und gitterbindemaschine mit solchen werkzeugen
JPS6023060B2 (ja) * 1977-07-15 1985-06-05 株式会社アワクメ 牽引装置
SE451806B (sv) * 1979-10-08 1987-11-02 Esab Ab Anordning for frammatning av en svetstrad
DE3021673C2 (de) * 1980-06-10 1983-07-21 Philipp Holzmann Ag, 6000 Frankfurt Einschubgerät für Spannglieder

Also Published As

Publication number Publication date
JPH0364421B2 (de) 1991-10-07
US4629105A (en) 1986-12-16
IT1173827B (it) 1987-06-24
EP0138895A1 (de) 1985-05-02
JPS60500526A (ja) 1985-04-18
IT8420032A0 (it) 1984-03-13
FR2542719A1 (fr) 1984-09-21
AU567739B2 (en) 1987-12-03
AU2815384A (en) 1984-10-09
FR2542719B1 (fr) 1985-07-26
WO1984003688A1 (fr) 1984-09-27
SU1268102A3 (ru) 1986-10-30
DE3461774D1 (en) 1987-02-05
BR8406448A (pt) 1985-03-12

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