EP0613532A1 - Dispositif de transmission du mouvement rotatif d'un arbre de commande a un arbre mene afin d'imprimer a celui-ci une vitesse angulaire variable en fonction de celle de l'arbre de commande - Google Patents

Dispositif de transmission du mouvement rotatif d'un arbre de commande a un arbre mene afin d'imprimer a celui-ci une vitesse angulaire variable en fonction de celle de l'arbre de commande

Info

Publication number
EP0613532A1
EP0613532A1 EP92902202A EP92902202A EP0613532A1 EP 0613532 A1 EP0613532 A1 EP 0613532A1 EP 92902202 A EP92902202 A EP 92902202A EP 92902202 A EP92902202 A EP 92902202A EP 0613532 A1 EP0613532 A1 EP 0613532A1
Authority
EP
European Patent Office
Prior art keywords
curve
shaft
driven
driving wheel
wheel
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.)
Ceased
Application number
EP92902202A
Other languages
German (de)
English (en)
Inventor
Gösta LIDMAN
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.)
PMB Holding BV
Original Assignee
PMB Holding BV
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 PMB Holding BV filed Critical PMB Holding BV
Publication of EP0613532A1 publication Critical patent/EP0613532A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H27/00—Step-by-step mechanisms without freewheel members, e.g. Geneva drives
    • F16H27/04—Step-by-step mechanisms without freewheel members, e.g. Geneva drives for converting continuous rotation into a step-by-step rotary movement
    • F16H27/06—Mechanisms with driving pins in driven slots, e.g. Geneva drives
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C1/00—Elements of cigar manufacture
    • A24C1/26—Applying the wrapper
    • A24C1/28—Wrapper transferring mechanisms

Definitions

  • the present invention relates to a device for trans ⁇ mitting a rotational movement from a driving shaft to a driven shaft, where the driven shaft, in accordance with a predetermined sequence is imparted an angular velocity which varies during its rotation relative to the driving shaft.
  • a certain process may require that a driven operating shaft be rotated at an angular velocity which varies during its rotation.
  • a driven operating shaft be rotated at an angular velocity which varies during its rotation.
  • One example of such industrial activity is cigar manu ⁇ facturing, where a gripper carried by a driven shaft must capture a wrapper from a pick-up station and transport the wrapper to an apparatus where the wrapper is to be wrapped at a varying wrapping speed about a cigar body and be fixed thereto, whereafter the gripper returns to the pick-up station to pick up a new wrapper.
  • the wrapper gripper consists of a suction box adapted to the shape of the wrapper, carried on the outer end of a carrying arm extending radially from an oscillating working shaft, said arm being articulated at its centre portion.
  • the working shaft is driven via a bevel gear which engages a driving toothed segment which supports a cam roller which engages a continuous curve groove in a rotating disc.
  • the toothed segment and thus the working shaft are imparted, via an angle transmission, an oscillating movement by the engagement of the cam roller in the curve groove in the disc.
  • the angular velocity of the oscillation movement is thus controlled by the slope of the curve groove relative to the centre of the disc.
  • the carrier arm for the suction box can be caused to swing back and forth in accordance with a desired pattern of motion, between a pick-up position for the wrappers and a delivery station where the wrapper can be gradually released from the suction box and be wrapped on a cigar body at the same time as the box is moved with varying speed over the length of the body.
  • the driving shaft have a driving wheel, which on one end side has a plurality of curve grooves, which are disposed in a plane normal to the shaft of the driving wheel and have pre ⁇ determined curve shapes with a varying slope towards the centre of the driving wheel dependent on the predeter ⁇ mined variation of the angular velocity of the driven shaft, and in that the driven shaft has a driven wheel which lies in a plane parallel and adjacent to the driving wheel and partially overlapping the driving wheel, and has a plurality of peripherally spaced curve rollers, which are axially biased to a retractive position in the driven wheel but which, by means of a cam follower in contact with an axial curve can be sequent ⁇ ially brought into axial insertion into a respective
  • This design of the device for transmission of rotational movement makes it possible to control the rotation of the driven working shaft and thus the swing movement of the two carrying arms with an angular velocity varying between standing still and a maximum speed during each rotation of the working shaft in accordance with a pre ⁇ determined pattern of movement as required by the respective carrying arms with suction boxes.
  • the driving wheel has four curve grooves which have pairs with different predetermined curve shapes, the curves with the same curve shape having curve entrances which are located diametrically opposite to each other on the driving wheel and alternating with the two other curve grooves.
  • the curve grooves in one pair are formed so that when in engagement with a cooperating curve roller said roller will rotate the driven working shaft during the phase, when the carrying arms are carrying out their respective conveyance movements between the pick-up station and the wrapping station, while the curve grooved in the other pair lying alternatingly between the first pair of curve grooves are formed to perform, when engaged with a cooperating curve roller, a pattern of movement deter ⁇ mined by the wrapping process.
  • the driven wheel has suitably eight curve rollers spaced circumferentially about a common circle. This provides a gear ratio of 1:2 between the continuously rotating driving wheel and the wheel driven with variable angular velocity.
  • the device according to the invention is especially suited for use in a machine for wrapping wrappers about cigar bodies to increase capacity, the invention is not exclusively limited thereto but can be used in other industrial activities.
  • Fig. 1 is a schematic composite view of a device accord ⁇ ing to the present invention used in a machine for trans ⁇ porting wrappers to cigar bodies between a pick-up station and a wrapping station
  • Fig. 2 is a schematic view in perspective of the device according to the invention
  • Fig. 3 is a partially sectioned side view of the device according to the invention.
  • Fig. 4 is a partially sectioned side view of a curve roller unit, and
  • Fig. 5 is an end view of the unit in Fig. 4.
  • Fig. 1 shows a portion of an installation for transport ⁇ ing wrappers from a pick-up station to a wrapping station in a cigar wrapping machine.
  • This installation consists in principle of a vertical centre pillar 10 which is fixed to a machine table 12 and houses a rotatably journalled working shaft 14.
  • the upper end of the working shaft 14 has two carrying arms 16 extending in an opposite direction which are non-rotatably mounted thereon.
  • Each arm 16 is articulated at 18 in its centre portion, so that the arm has an inner arm portion 20 and an outer arm portion 22.
  • the outer arm portion 22 supports a suction box 24 rotatably journalled about a vertical axis, the underside of said suction box having a shape which essentially corresponds to the shape of the wrapper to be conveyed.
  • a suction box 24 rotatably journalled about a vertical axis, the underside of said suction box having a shape which essentially corresponds to the shape of the wrapper to be conveyed.
  • the left hand carrying arm in Fig. 1 only a portion of its inner arm portion 20 is shown, but despite the fact that it is not shown, it is to be understood that the left-hand carrying arm is identical to the right-hand carrying arm and carries a suction box at its outer end.
  • the pivot movement of the outer arm portion 22 about the joint 18 is controlled in a manner known per se by the upper fixed curve disc 26 which cooperates with a cam roller (not shown) which engages therein.
  • An additional overlying fixed curve disc 28 controls in a manner known per se the rotary movement of the suction box 24 about its own vertical axis by means of a curve roller (not shown) engaging in the curve disc 28.
  • the curve roller via a lever 30, causes the suction box 24 to rotate in accordance with a curve configuration in the curve disc 28.
  • the conveyor installation is so arranged in the machine so that when one suction box 24 is in a pick-up position for picking up a wrapper from a feed conveyor, the other suction box 24 will be at a wrapping station where one end of the wrapper is moved, by means of a wrapper needle (not shown) down against a cigar body which is in an underlying rolling apparatus.
  • a drive motor 32 shown schematically in Fig. 1, is joined via a drive shaft 34 to a drive wheel 36 which has an end flange 38 onto which there is fixed a curve disc 40 provided with curve grooves.
  • the disc in the embodi ⁇ ment shown has four finite curve grooves 42, 44, 46, 48, running in the radial plane, curve grooves 42, 44 and 46, 48 respectively being identical pairs and arranged alter ⁇ nating with each other around the disc.
  • Grooves 42, 44 have groove openings 50 and 52, respectively, at the periphery of the curv disc 40, while grooves 46, 48 have groove openings 54 and 56, respectively.
  • Curve grooves 42, 44 follow an essentially spirally shaped path towards the centre of the curve disc counter to the rotational direction of the disc 40, the slope of each groove varying between the outer groove opening 50 or 52, respectively, and the inner end of the groove depending on the desired variation in angular velocity of the driven work shaft 14 and the speed of swing of the carrier arms 16 and the conveyance speed of the wrappers from the pick-up station to the wrapping station and the return of the empty suction box 24 to the pick-up station.
  • the two other curve grooves 46, 48 also follow an essentially spiral path towards the centre of the disc in the same direction as the curve grooves 42, 44.
  • the curve grooves 46, 48 also have a slope which can vary between the groove opening 54, 56 and the inner end of the groove depending on the desired variation of the angular velocity of the driven shaft 14 and thus the swing speed of the carrier arm 16 and the suction boxes 24 during the phase when a cigar body is wrapped with a wrapper at the wrapping station or a new wrapper is picked up at the pick-up station.
  • the drive wheel 36 is arranged to rotate a driven wheel 58 disposed in an adjacent radial plane and which parti ⁇ ally overlaps the drive wheel 36.
  • the driven wheel 58 has an output shaft 60 lying parallel to the drive shaft 34.
  • the driven wheel 58 has in the embodiment shown eight curve roller units 62 distributed evenly about a common circle.
  • each curve roller unit 62 has a cylindrical housing 64 with a round mounting flange 66 at one end.
  • the flange 66 has four through- holes 67 (Fig. 5) for fixing each housing 64 to an end flange 61 of the driven wheel by means of screws (not shown).
  • Through the housing 64 there extends a rod 70, one end of which (the left hand end in Fig. 4) supports a rotatable driver curve roller 72, and the other end of which supports a cam follower roller 74.
  • the rod 70 is biased by a spring 76 to a retracted position in the housing 64 as is shown with solid lines in Fig. 4.
  • the cam follower rollers 74 of the curve roller unit 62 are disposed, as the driven wheel 58 rotates, to be in rolling contact with a cam element 78 running angularly in the radial plane.
  • the cam element 78 has two sloping ramp portions 80 and 82 and a raised portion 84 lying therebetween.
  • the cam element 78 is so disposed that when a cam roller unit 62 is in a position such that its cam follower roller 74 is up on the raised portion 84 of the cam element 78, its curve roller 72 is in a projecting position such as shown in Fig. 3 and with dash-dot lines in Fig. 4, thus bringing the curve roller 72 into rolling contact with a cooperating curve groove in the curve disc 40 on the drive wheel 36.
  • a curve roller 72' which is in rolling contact with the curve groove 42 and is thus acted on by the rotation of the drive wheel 36 and transmits the rotation to the driven wheel 58, has almost reached the end of the groove 42.
  • the next curve roller 72" has been raised by the ramp 80 and has, when the curve roller 72' has left its groove 42 by moving down the sloping ramp 82 on the cam element 78, been brought via the groove opening 54 into rolling engagement with the curve groove 46, the con ⁇ figuration of which primarily controls the movement of the carrier arm 16 during the wrapping phase at the wrapping station.
  • the next curve roller 72"' is lifted by the ramp 80 and is inserted into the curve groove 46 via the groove opening 52, so that the carrier arm 60 can be moved to or from the wrapping station or the pick-up station for wrappers.
  • the curve rollers 72 are brought one by one into rolling engagement with the respective curve grooves 42, 44, 46 and 48 to thus transmit the rotation to the driven wheel 58 at varying angular velocity in accordance with the desired predetermined pattern of movement as determined by the shapes of the curve grooves. Only during a short period do the rolling engagements overlap each other, and there ⁇ fore only one driver roller 72 at a time normally trans ⁇ mits the force from the drive wheel 36.
  • the driven wheel 58 has eight curve roller units 62, which means that the gear ratio between the weels 32 and 58, which rotate in opposite directions, will be 2:1.
  • the wheel 58 drives the working shaft 14 via the shaft 60 and a bevel-gear 86 of suitable gear ratio, so that the working shaft 14 is imparted the desired rotational speed, e.g. 30 rpm.
  • the device for transmitting motion according to the invention has been described above in connection with an installation for conveying wrappers from a pick ⁇ up station to a wrapping station in a cigar manufacturing machine in order to increase the production capacity thereof, the invention is not limited to this specific application but can be used for other industrial activity.
  • the number of curve grooves on the drive wheel and the number of curve roller units on the driven wheel, as well as the curve configuration of the curve grooves can be varied to fullfil desires made at each occasion for each individual application.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Specific Conveyance Elements (AREA)

Abstract

L'invention se rapporte à un dispositif de transmission du mouvement rotatif d'un arbre de commande (34) à un arbre mené (60), où ledit arbre mené reçoit, en fonction d'une séquence prédéterminée, une vitesse angulaire pendant sa rotation variable par rapport à l'arbre de commande. L'arbre de commande (34) possède une roue d'entraînement (36) comportant une pluralité de rainures incurvées (42, 44, 46, 48), dont les formes d'incurvation sont prédéterminées avec une inclinaison variable en fonction de la variation prédéterminée de la vitesse angulaire de l'arbre mené (60). Celui-ci recouvre partiellement la roue d'entraînement (36) et possède une pluralité de galets d'entraînements incurvés (72), répartis périphériquement et situés de façon à s'insérer séquentiellement dans une rainure incurvée respective de la roue d'entraînement, afin d'être entraînés par cette dernière pendant une partie de la rotation, jusqu'à ce que le galet incurvé suivant (72), dans le sens de rotation, vienne en contact de roulement avec la rainure incurvée suivante.
EP92902202A 1991-11-19 1991-11-19 Dispositif de transmission du mouvement rotatif d'un arbre de commande a un arbre mene afin d'imprimer a celui-ci une vitesse angulaire variable en fonction de celle de l'arbre de commande Ceased EP0613532A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE1991/000783 WO1993010375A1 (fr) 1991-11-19 1991-11-19 Dispositif de transmission du mouvement rotatif d'un arbre de commande a un arbre mene afin d'imprimer a celui-ci une vitesse angulaire variable en fonction de celle de l'arbre de commande

Publications (1)

Publication Number Publication Date
EP0613532A1 true EP0613532A1 (fr) 1994-09-07

Family

ID=20382175

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92902202A Ceased EP0613532A1 (fr) 1991-11-19 1991-11-19 Dispositif de transmission du mouvement rotatif d'un arbre de commande a un arbre mene afin d'imprimer a celui-ci une vitesse angulaire variable en fonction de celle de l'arbre de commande

Country Status (2)

Country Link
EP (1) EP0613532A1 (fr)
WO (1) WO1993010375A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009095895A2 (fr) * 2008-02-01 2009-08-06 Ben Cornelius Agencement de transmission pour une machine rotative
KR102982700B1 (ko) * 2021-01-22 2026-06-25 트럼프 레이저시스템즈 포 세미컨덕터 매뉴팩처링 에스이 가변 빔 변조

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918336A (en) * 1974-03-28 1975-11-11 Harris Intertype Corp Trimmer drive assembly
GB8428644D0 (en) * 1984-11-13 1984-12-19 Mead Corp Cam assembly for feeder mechanism
DE3509182A1 (de) * 1985-03-14 1986-09-18 Brockfeld & Meyer GmbH & Co KG, 4980 Bünde Verfahren und vorrichtung zum maschinellen ueberrollen eines zigarren-, zigarillo- oder stumpenwickels mit einem deckblatt

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9310375A1 *

Also Published As

Publication number Publication date
WO1993010375A1 (fr) 1993-05-27

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