EP0311731B1 - Dispositif pour tendre un élément de traction dans une imprimante, notamment dans une imprimante à matrice - Google Patents

Dispositif pour tendre un élément de traction dans une imprimante, notamment dans une imprimante à matrice Download PDF

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Publication number
EP0311731B1
EP0311731B1 EP87730130A EP87730130A EP0311731B1 EP 0311731 B1 EP0311731 B1 EP 0311731B1 EP 87730130 A EP87730130 A EP 87730130A EP 87730130 A EP87730130 A EP 87730130A EP 0311731 B1 EP0311731 B1 EP 0311731B1
Authority
EP
European Patent Office
Prior art keywords
deflection roller
housing
eccentric
traction element
printer
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 - Lifetime
Application number
EP87730130A
Other languages
German (de)
English (en)
Other versions
EP0311731A1 (fr
Inventor
Günter Dipl.-Ing. Gomoll (FH)
Wolfgang Dipl.-Ing. Hauslaib (Fh)
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Priority to EP87730130A priority Critical patent/EP0311731B1/fr
Priority to DE8787730130T priority patent/DE3769651D1/de
Priority to AT87730130T priority patent/ATE62870T1/de
Priority to US07/248,659 priority patent/US4883445A/en
Publication of EP0311731A1 publication Critical patent/EP0311731A1/fr
Application granted granted Critical
Publication of EP0311731B1 publication Critical patent/EP0311731B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J19/00—Character- or line-spacing mechanisms
    • B41J19/005—Cable or belt constructions for driving print, type or paper-carriages, e.g. attachment, tensioning means

Definitions

  • the invention relates to a device for tensioning a tension element in a printer, in particular in a matrix printer, which is fastened at one end to a reciprocating component, guided via a driven first deflection roller mounted in a frame-fixed manner and via a second deflection roller and with the other end is in turn attached to the reciprocating component, the second deflecting roller being rotatably mounted on a pivotable lever which is mounted in the printer frame about an axis parallel to the second deflecting roller axis and which bears against a wedge surface which, when the slope increases, is parallel to one displaceable on the tensile direction of the frame surface and is under the force of a tension spring, which acts in the sense of increasing the tensile force.
  • Such a tension device is known from document DE-C-33 19 671.
  • the rope is tensioned by pulling (pulling the rope strand).
  • the component bearing the wedge surface yields.
  • the component carrying the wedge surface slides back and should dampen back and forth vibrations due to this behavior;
  • Such effects are, however, only sought for type wheel printers, so that the same characters are congruent when the printing carriage is moved in and out, i.e. without striking offset. Not all types of printer require such a solution.
  • the known solution is therefore only for type wheel printers.
  • the present invention is therefore based on the object of modifying the known device to the effect that a basic voltage can be applied which, after reaching the set voltage, remains at its specific level.
  • the stated object is achieved according to the invention by means of the device described in the introduction in that the second deflection roller with its roller bearings is rotatably mounted in a lever designed as a covering housing, in that an adjustable eccentric is rotatably mounted in the housing on the wedge surface, and in that the eccentric position can be fixed. After setting a basic tension, this lever maintains the specified minimum tension, which is ensured by the eccentric resting on the wedge surface.
  • the invention therefore functionally combines the advantages of an eccentric with those of a wedge surface.
  • a recess is provided in the housing opposite the eccentric and that a detent toothing is arranged on the circumference of the eccentric, in which engages a relatively stationary detent finger.
  • the locking finger is arranged on the inside of the housing and can be actuated from the outside through an additional opening in the housing. With this design, the position of the eccentric can be seen from the outside and thus the basic voltage position.
  • the device for tensioning a tension element 1 is located in the area of the side boards 2 and 3, which form a printer frame 4. Between these side boards 2 and 3, a reciprocating component 5, which here consists of a print head carriage, is guided on guide axes 6 and 7, respectively.
  • the component 5 carries a print head 8, by means of which characters are generated on a record carrier, which is itself transported via a print abutment 9.
  • a first deflection roller 11 which is rotatably mounted in a pillow block 10, is provided on the printer frame 4.
  • a second deflection roller 12 which is arranged to be adjustable.
  • the second deflection roller 12 is functionally mounted on a lever 13 so that it can rotate.
  • the lever 13 is mounted on a pair of support projections 14a and 14b on the side plate 3, a hinge projection 13a (FIG. 3) arranged between the support projections 14a, 14b being provided.
  • the second deflection roller 12 runs with its deflection roller axis 12a parallel to an axis of rotation 14, which is formed in the printer frame 4.
  • the lever 13 is indirectly against a wedge surface 15.
  • the bevel 16 extends with respect to a frame surface 17 so that the lever 13 is pivoted by the printer frame 4 about the axis of rotation 14, ie that the second deflection roller 12 is moved in the pulling direction 18.
  • a wedge body 19 having the wedge surface 15 or the bevel 16 is moved in a guide 20 by means of a guide projection 21, this movement being supported on the basis of a tension spring 22 fastened to the printer frame 4.
  • the force of the tension spring 22 acts parallel to the frame surface 17.
  • the slope 16 therefore increases the tensile force in the direction of tension 18.
  • the lever 13 is now designed as a covering housing 23, the second deflection roller 12 with its roller bearings 24 being arranged in the covering housing 23 and also carrying out all movements of the housing 23 or the lever 13.
  • the covering housing 23 also receives an adjustable eccentric 25, the eccentric position of which can be fixed.
  • a recess 26 is provided in the housing 23 opposite the eccentric 25, through which the eccentric 23 passes with its eccentric circumference 23a on the wedge surface 15.
  • the eccentric circumference 23a has in one section a locking toothing 27 into which a locking finger 28, which is relatively fixed to the lever 13, engages.
  • the locking finger 28 is arranged on the inside 29 and can be actuated from the outside through a further opening 30 in the housing 23.
  • the eccentric 25 (FIG. 2) has an eccentricity "e".
  • the basic tension (a minimum tension) in the tension element 1 is set via this eccentricity "e”.
  • the rope friction value determined from experience is used in a known manner. It should be noted here that the basic tension is set as low as possible in order to keep the bearing forces of the first deflection roller 11 and the second deflection roller 12 as small as possible, which is a small one Drive power means. In printers, drive forces are often also diverted from the drive of the deflection rollers 11 and 12, so that the drive power increases as a result. Different friction conditions can also occur within a line length.
  • the tension spring 22 has no effect in the case of the exemplary embodiment in the manner described above.
  • the observation of FIG. 2 shows that with a very large spring constant of the system tending towards “infinite”, the path change of the deflection roller 12 becomes almost zero.
  • the setting of a basic tension in the tension element 1 is important. It should be noted here that steel cables made from strands each have two different elongation states, on the one hand an elongation in the relatively thin individual strands themselves and on the other hand in the stranding of the rope during manufacture. In practice, this stretch in production manifests itself as a gradual process, i.e. the rope tension decreases continuously within certain limits. For this reason, a basic voltage in the form of a minimum voltage is required. It would be possible to increase the basic voltage in order to obtain a necessary minimum voltage when the setting process is involved. However, a too high final voltage leads to an increase in the drive power and may result in Lifetime problems due to overloading the tension element.
  • the invention takes these aspects into account in that the eccentric 25 creates a rigid suspension of the tension element system with a self-adjusting device. Here, the self-adjusting device only serves to compensate for the so-called production stretch in the tension element 1.

Claims (3)

  1. Dispositif pour tendre un élément de traction (1) dans une imprimante, en particulier dans une imprimante à matrice, qui est fixé, à une extrémité (1a), à une pièce (5) mobile en va-et-vient, est guidé par un premier rouleau de renvoi (11) entraîné, monté rotatif en étant fixé au bâti et par un second rouleau de renvoi (12), et qui est fixé, par l'autre extrémité (1b), à nouveau à la pièce (5) mobile en va-et-vient, le second rouleau de renvoi (12) étant monté rotatif sur un levier pivotant (13), qui est monté, dans le bâti (4) de l'imprimante, sur un axe (14) s'étendant parallèlement à l'axe (12a) du second rouleau de renvoi et repose contre une surface inclinée (15), qui, en remontant (16), est déplaçable parallèlement à une surface de bâti (17) s'étendant perpendiculairement au sens de traction (18) et se trouve sous l'action d'un ressort de traction (22), qui agit dans le sens d'une augmentation de la force de traction,
    caractérisé en ce que le second rouleau de renvoi (12) est monté rotatif, par ses paliers (24), dans un levier (13) réalisé en tant que carter de recouvrement (23), en ce qu'un excentrique (25) réglable est monté rotatif dans le carter (23) en s'appuyant sur la surface inclinée (15), et en ce que la position de l'excentrique peut être fixée.
  2. Dispositif selon la revendication 1,
    caractérisé en ce qu'un évidement (26) est prévu, dans le carter (23), vis-à-vis de l'excentrique (25), et en ce que, à la périphérie (23a) de l'excentrique (25), est disposée une denture d'encliquetage (27), dans laquelle s'engage un doigt d'encliquetage (28) relativement fixe.
  3. Dispositif selon les revendications 1 et 2,
    caractérisé en ce que le doigt d'encliquetage (28) est agencé du côté interne (29) du carter (23) et peut être actionné, de l'extérieur, à travers une ouverture supplémentaire (30) dans le carter (23).
EP87730130A 1987-10-16 1987-10-16 Dispositif pour tendre un élément de traction dans une imprimante, notamment dans une imprimante à matrice Expired - Lifetime EP0311731B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP87730130A EP0311731B1 (fr) 1987-10-16 1987-10-16 Dispositif pour tendre un élément de traction dans une imprimante, notamment dans une imprimante à matrice
DE8787730130T DE3769651D1 (de) 1987-10-16 1987-10-16 Vorrichtung zum spannen eines zugelementes in einem drucker, insbesondere in matrixdrucker.
AT87730130T ATE62870T1 (de) 1987-10-16 1987-10-16 Vorrichtung zum spannen eines zugelementes in einem drucker, insbesondere in matrixdrucker.
US07/248,659 US4883445A (en) 1987-10-16 1988-09-26 Device for tensioning of a pulling element of a printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87730130A EP0311731B1 (fr) 1987-10-16 1987-10-16 Dispositif pour tendre un élément de traction dans une imprimante, notamment dans une imprimante à matrice

Publications (2)

Publication Number Publication Date
EP0311731A1 EP0311731A1 (fr) 1989-04-19
EP0311731B1 true EP0311731B1 (fr) 1991-04-24

Family

ID=8198371

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87730130A Expired - Lifetime EP0311731B1 (fr) 1987-10-16 1987-10-16 Dispositif pour tendre un élément de traction dans une imprimante, notamment dans une imprimante à matrice

Country Status (4)

Country Link
US (1) US4883445A (fr)
EP (1) EP0311731B1 (fr)
AT (1) ATE62870T1 (fr)
DE (1) DE3769651D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1803576A1 (fr) * 2005-12-28 2007-07-04 Brother Kogyo Kabushiki Kaisha Appareil de formation d'images capable de supporter stablement un chariot

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU650650B2 (en) * 1990-05-04 1994-06-30 Rover Mowers Limited Belt tension adjustment mechanism
JP2919650B2 (ja) * 1991-06-28 1999-07-12 キヤノン株式会社 キャリッジ移動装置及びシリアル記録装置
EP0605906B1 (fr) * 1993-01-08 1997-10-08 Agfa-Gevaert N.V. Dispositif de serrage
US5902202A (en) * 1996-12-16 1999-05-11 Maytag Corporation Belt tensioning system
US6485207B1 (en) 2001-03-07 2002-11-26 Eugene David Allen Printer assembly providing tension for idler pulley
US6966882B2 (en) 2002-11-25 2005-11-22 Tibion Corporation Active muscle assistance device and method
US7811189B2 (en) * 2005-12-30 2010-10-12 Tibion Corporation Deflector assembly
US8353854B2 (en) 2007-02-14 2013-01-15 Tibion Corporation Method and devices for moving a body joint
WO2009099671A2 (fr) 2008-02-08 2009-08-13 Tibion Corporation Appareil orthopédique et d’assistance à la mobilité adaptable
US20090306548A1 (en) 2008-06-05 2009-12-10 Bhugra Kern S Therapeutic method and device for rehabilitation
US8274244B2 (en) 2008-08-14 2012-09-25 Tibion Corporation Actuator system and method for extending a joint
US8058823B2 (en) 2008-08-14 2011-11-15 Tibion Corporation Actuator system with a multi-motor assembly for extending and flexing a joint
US8639455B2 (en) 2009-02-09 2014-01-28 Alterg, Inc. Foot pad device and method of obtaining weight data
US8888625B2 (en) * 2010-09-28 2014-11-18 Oxbo International Corporation Quick release tensioner
EP3352007B1 (fr) * 2012-04-30 2020-12-23 Threat Spectrum Inc. Ensemble de motorisation
DE102012213062A1 (de) * 2012-07-25 2014-01-30 Siemens Aktiengesellschaft Ketten- oder Riementrieb
WO2014151584A1 (fr) 2013-03-15 2014-09-25 Alterg, Inc. Système et procédé de commande d'un dispositif d'orthèse

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5769082A (en) * 1980-10-20 1982-04-27 Ricoh Co Ltd Tension mechanism for space wire and the like
US4395151A (en) * 1981-11-02 1983-07-26 Zenith Radio Corporation Print head drive belt tensioning means and method for line printer
DE3319671A1 (de) * 1983-05-31 1984-12-06 Olympia Werke Ag, 2940 Wilhelmshaven Spannvorrichtung fuer ein seilfoermiges uebertragungsglied einer antriebsvorrichtung in schreib- oder aehnlichen bueromaschinen
US4678354A (en) * 1985-12-02 1987-07-07 Xerox Corporation Typewriter cable tensioning mechanism
US4761154A (en) * 1987-05-28 1988-08-02 Hewlett-Packard Company Belt tensioner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1803576A1 (fr) * 2005-12-28 2007-07-04 Brother Kogyo Kabushiki Kaisha Appareil de formation d'images capable de supporter stablement un chariot
US7726774B2 (en) 2005-12-28 2010-06-01 Brother Kogyo Kabushiki Kaisha Image forming device capable of stably supporting carriage

Also Published As

Publication number Publication date
EP0311731A1 (fr) 1989-04-19
DE3769651D1 (de) 1991-05-29
US4883445A (en) 1989-11-28
ATE62870T1 (de) 1991-05-15

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