EP0002796B1 - Mécanisme de transport pour feuilles de papier ou bandes de papier continues dans une imprimante - Google Patents

Mécanisme de transport pour feuilles de papier ou bandes de papier continues dans une imprimante Download PDF

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Publication number
EP0002796B1
EP0002796B1 EP78101786A EP78101786A EP0002796B1 EP 0002796 B1 EP0002796 B1 EP 0002796B1 EP 78101786 A EP78101786 A EP 78101786A EP 78101786 A EP78101786 A EP 78101786A EP 0002796 B1 EP0002796 B1 EP 0002796B1
Authority
EP
European Patent Office
Prior art keywords
ratchet wheel
pins
print roll
shaft
gear arrangement
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
EP78101786A
Other languages
German (de)
English (en)
Other versions
EP0002796A1 (fr
Inventor
Manfred Schmidt
Rainer Jürgen Kratzert
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of EP0002796A1 publication Critical patent/EP0002796A1/fr
Application granted granted Critical
Publication of EP0002796B1 publication Critical patent/EP0002796B1/fr
Expired 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/24—Detents, brakes, or couplings for feed rollers or platens
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/26—Pin feeds
    • B41J11/30—Pin traction elements other than wheels, e.g. pins on endless bands
    • 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
    • B41J19/76—Line-spacing mechanisms
    • B41J19/78—Positive-feed mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/20—Advancing webs by web-penetrating means, e.g. pins

Definitions

  • the invention relates to a paper transport device for the transport of single and continuous forms in a writing device, in particular for transport in terminal printers, according to the preamble of claim 1.
  • a desktop computing device is known from German utility model 7 333 837, which contains a printing roller for transporting the paper to be printed, which serves on the one hand as a support for the printing unit and on the other hand as a friction drive.
  • this desktop computing device can be provided with a transport device having pins in the form of spiked rollers.
  • This spiked roller is by constant angular steps through one.
  • Stepper drive is drivable, which comprises a one-way stepping mechanism which is also actuated by the step-by-step lifting element which drives the platen roller.
  • This known transport device for forms in a desktop computing device either works only with the pressure roller as a friction drive or so that the spike roller is also driven by the drive for the pressure roller.
  • both parts are driven at the same time, there is always a puffing of the paper web between the two transport devices due to inaccuracies, particularly in the case of mechanical drives, so that a clean printed image cannot be achieved. So there are so-called imprecise line spacings.
  • due to the mechanical drive such an arrangement is not suitable for achieving the relatively high paper feed speeds required in terminal printers and the flexibility in the lengths of the paper feed.
  • US Pat. No. 3,880,016 describes a paper transport device according to the preamble of claim 1.
  • This paper transport device contains a feed roller, which is also used for support or feed purposes, and a transport device with pins for edge-punched forms.
  • a controllable stepper drive is provided for the application of the feed force.
  • a free-wheeling gear arrangement is provided on the shaft of the pressure roller and can be driven by a step-by-step mechanism which has a first and second clutch part which can be brought into engagement with it. If the gearwheel arrangement is engaged, then both the pressure roller and the transport device having pins are connected in terms of drive to the stepping drive.
  • the combination formed from the printing roller and pins can be moved or rotated together using a handwheel to align forms with the printing line.
  • a disadvantage of this known arrangement is that the pressure roller and the transport device having pins are always coupled to one another and are advanced either by hand or via the stepping drive. They are structurally related to one another and are therefore not intended and suitable for an independent advance of the forms by the transport device having the pins or the pressure roller or a decoupling of these two parts.
  • the object of the present invention is therefore to provide, in a paper transport device of the type according to the preamble of claim 1, the possibility that such a paper transport device can be easily adapted to various tasks, is simple in design, works safely and reliably and is simple to use is to be handled.
  • the invention advantageously makes it possible to design a simple paper transport device in such a way that it is very flexible in its use, so that both individual and continuous forms can be fed securely, these can be easily inserted and are fed in such a way that even at relatively high feed speeds an attractive and reliable print image with constant line spacing can certainly be achieved. Further advantages result from the description of the exemplary embodiment.
  • FIG. 1 contains the parts essential for the inventive function. Share the z. B. serve the storage, are not shown for better clarity, but they are clearly obvious to a specialist.
  • the shaft 3 is rotatably supported in bearings, not shown.
  • the paper web 2 can be wrapped around the printing roller 1 at an angle of more than 90 ° and is then, as in the exemplary embodiment shown in FIG. 1, an endless form with a perforated edge tion holes is guided by a transport device formed from two tractors 4 and 5, pins.
  • the tractors 4 and 5 each consist essentially of a belt 8 and 9, which is provided with teeth on the inside, and each is guided around two toothed wheels 11 and 12 or 13 and 14.
  • the belts 8 and 9 have pins 15 on the outside, which engage in the perforated edges of the paper web 2 at a corresponding distance and thus advance them when driven.
  • the tractors can also be provided with hinged covers 16, by means of which the paper web is held on the pins 15 or the belts 8 and 9.
  • a drive gear 17 is arranged, which is driven by an intermediate wheel 18 in the direction T, the transport direction of the paper web 2.
  • the intermediate gear 18 meshes with a gear 19 of a gear arrangement which is arranged freely on the shaft 3 of the printing roller 1.
  • the gear 19 running freely on the shaft 3 can be driven directly by a stepper motor 20 with a drive gear 21, or, as shown in the illustration in FIG. 1, via a further gear 22 which is in engagement with the drive gear 21 of the stepper motor 20.
  • the two gears 19 and 22 are then rigidly connected to one another via a sleeve 23.
  • the gear wheel 22 has a first coupling part 24, which is provided with slots 25, into which lugs 27 attached there can engage in order to connect the two coupling parts to one another in a rotationally fixed manner.
  • the second clutch part 26 is attached to a toothed ratchet wheel 28 on the side of the first clutch part 24 of the gear wheel 22.
  • the ratchet wheel 28 is rotatably connected to a handwheel 30 via a sleeve 29.
  • the ratchet wheel 28 together with the sleeve 29 and the handwheel 30 are arranged on the shaft 3 of the roller 1 so as to be displaceable in the axial direction. For this displacement in the axial direction, an elongated hole 31 is provided in the sleeve 29 on both sides.
  • a pin 32 is arranged, past which the sleeve 29 together with the handwheel 30 and the ratchet wheel 28 can be moved in the axial direction on the shaft 3 of the pressure roller 1, limited by the length of the elongated hole 31.
  • the ratchet wheel 28 In the position shown in FIG. 1, in which the ratchet wheel 28 together with the handwheel 30 is located on the right at the extreme end of the shaft 3, the ratchet wheel 28 is locked in rotation by a catch 33.
  • the two coupling parts 24 and 26 are not in engagement with each other.
  • Fig. 2 shows a side view of a sectional view along the plane 2-2 of Fig. 1. It can be clearly seen how the paper web 2 is guided at a wrap angle of more than 90 ° around the pressure roller 1 and of the transport device having pins, such as For example, the tractor 5 can be advanced in the direction of arrow T.
  • the printing roller 1 serves as a support for a printing device 34, which can be designed, for example, as a wire pen printer.
  • the paper lies well in the printing position in the printing device 34 on the printing roller 1, so that a clean print image is ensured from the paper guide.
  • paper brakes 35 formed from leaf springs are provided which, in an arc, bear against the printing roller 1 and thus press the paper web 2 against the printing roller 1.
  • paper pressure rollers 36 are provided, which can be placed on arms 37 in the direction of arrow 38 by an actuating device (not shown in more detail) on the printing roller 1 or can be held raised by the latter. For example, when the paper is fed through the tractors 4 and 5, it is convenient to keep the paper pinch rollers 36 in the lifted condition shown in FIG. Otherwise the braking effect would be too great.
  • the transport device comprising pins formed from the two tractors 4 and 5 and the gears 17 and 18 is expediently designed as an associated assembly and can be inserted and locked in a simple manner in the frame (not shown in the figures).
  • the drive coupling when such a pin having a transport device is attached to the intended roller drive then takes place via the gear arrangement, which in the exemplary embodiment consists of the gears 19 and 22, connected via a fixed sleeve 23.
  • a single gearwheel can also be provided for this, if the transmission ratios and the space conditions permit or necessitate this.
  • the paper transport device designed according to the invention serves various purposes. Let us first consider the case where an endless form web with perforations in the edge is to be inserted into the transport device shown in the figures. For this purpose, the handwheel 30 with the ratchet wheel 28 is shifted to the left by the operator into a position in which this is released by the detent 33, but not so far that the two coupling parts 24 and 26 are in engagement with one another.
  • the handwheel 30 Due to the non-rotatable connection via the slot 31 and the pin 32, the handwheel 30 is connected to the shaft 3 in a rotationally fixed manner. As a result, the pressure roller 1 is rotated when the handwheel 30 is rotated, without the need for the non-coupled gear connection 21, 23, 22 and the intermediate wheel 18 and the drive gear 17, the two tractors 4 and 5 are rotated. This is because the gear connection, consisting of the two gear wheels 19 and 22, is arranged freely on the shaft 3. Thus, in this intermediate position of the ratchet wheel 28, there is the possibility of enabling the pressure roller 1 via the handwheel 30 to thread the paper web, which is fed from behind, without the transport device having the pins being rotated at the same time.
  • the paper pressure rollers 36 are expediently lifted off the printing roller 1 in this operation. This makes it easy to insert and insert paper by hand. If you have fed enough paper over the pressure roller 1 serving as a friction drive, the edge-perforated paper web 2 can be inserted into the pins 15 in the correct position with the lid 16 open.
  • the handwheel 30 with the ratchet wheel 28 is moved so far in the axial direction to the left (see FIG. 1) that the lugs 27 of the second coupling part 26 engage in the slots 25 of the first coupling part 24 and thus a connection between the gear 22 and via the connection consisting of slot 31 and pin 32 are connected in a rotationally fixed manner to the shaft 3 and thus to the pressure roller 1.
  • both the pressure roller 1 and the tractors 4 and 5 can still be rotated together by hand using the handwheel 30.
  • the pressure roller 1 as a paper brake if the paper web 2 provided with perforations at the edge is advanced by the two tractors 4 and 5 alone.
  • the handwheel 30 is brought with the locking wheel 28 into the position shown in FIG. 1, in which the shaft 3 and thus the pressure roller 1 are locked and stand still due to the engagement of the detent 33 in a tooth gap of the locking wheel 28.
  • the stepper motor 20 can drive the two tractors 4 and 5 via its drive gear 21 and the gear arrangement 19, 22 that freewheels on the shaft 3, the idler gear 18 and the drive gear 17 via the square drive shaft 6.
  • the stepper motor 20 is driven via its drive gear 21 in such a way that the gear 22 1, or in the intermediate position, transmits the driving force via the elongated hole 31 and the pin 32 to the shaft 3 of the pressure roller 1 via the coupled coupling parts 24 and 26, when the handwheel 30 is in the position on the left in FIG. 1, or in the intermediate position.
  • the paper pressure rollers 36 are expediently in contact with the printing roller 1. It thus serves as a pure friction drive on the one hand and on the other hand as a support for the printing device 34.
  • the transport device shown in the figures has two tractors 4 and 5. Instead of these tractors, a so-called spiked roller transport device can also be used, which contains rolls of relatively large diameters with perforations on the edges for guiding perforated paper webs. Furthermore, the gear arrangement consisting of the two gear wheels 19 and 22 can be replaced by a single gear wheel running freely on the shaft 3, which meshes with the drive pinion 21 of the stepping motor 20 and is driven thereby.
  • the stepping motor 20 is used in a known manner to gradually feed the paper web in the desired manner during printing.
  • the paper transport device designed according to the invention can be used in various ways in devices which write data or recordings, as was described above.
  • a particularly suitable field of application are the so-called terminal printers, which, due to the flexibility of the transport device according to the invention, can be used for various purposes, such as for example the continuous form feed with perforated webs or the single sheet feeding and feeding with the printing roller solely as a friction drive.
  • the paper transport device designed according to the invention is very flexible in its possible uses, comfortable and easy to use for the operator and structurally simple and functional.

Claims (10)

1. Mécanisme d'entraînement de papier pour le transport de papier en feuilles séparées ou en rouleaux dans un dispositif d'impression, en particulier une imprimante de terminal, comprenant un rouleau d'impression (1) utilisé pour l'avancement du papier et comme support de celui-ci, des moyens d'entraînement munis de tétons (15) pour des formulaires à perforations latérales qui, vus dans le sens du défilement de papier, sont disposés en amont du rouleau d'impression (1), des moyens de commande pas-à-pas fournissant la force d'entraînement, un ensemble de pignons montés fous sur l'axe (3) du rouleau d'impression (1) commandés par un mécanisme pas-à-pas, avec lequel le mécanisme d'entraînement muni de tétons (15) peut, pour les besoins de la commande, être engrêné par l'intermédiaire de l'ensemble de pignons, caractérisé en ce que
a) une roue dentée (28) est montée, fixe en rotation et de façon à pouvoir être déplacée axialement, sur l'axe (3) du rouleau d'impression (1),
b) la roue dentée (28) est munie d'un second organe d'accouplement (26, 27) destiné à s'engager avec un premier organe d'accouplement (24,25),
c) lorsque la roue dentée (28) est découplée et enclenchée de façon à l'immobiliser en rotation dans un doigt (33), le mécanisme d'entraînement (4, 5) muni de tétons (15) est uniquement couplé avec la commande pas-à-pas (20, 21) au moyen de l'ensemble de pignons (19, 23, 22) montés fous, le rouleau d'impression (1) étant alors au repos, et
d) lorsque l'ensemble de pignons (19,23,22) et la roue dentée (28) sont accouplés, ce qui implique que la roue dentée (28) est alors libre en rotation, la commande pas-à-pas (20, 21) commande le rouleau d'impression (1) par l'intermédiaire de l'axe (3), ainsi que le mécanisme d'entraînement (4, 5) muni de tétons (15).
2. Dispositif selon la revendication 1, caractérisé en ce que, lorsque la roue dentée (28) est dans une position intermédiaire dans laquelle elle n'est ni couplée avec l'ensemble de pignons (19, 23, 22) ni couplée avec le doigt (33), seul le mécanisme d'entraînement (4, 5) muni de tétons est connecté à la commande pas-à-pas (20, 21).
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que l'ensemble de pignons (19, 23, 22) montés fous est composé d'une ou deux roues dentées (19, 22) rigidement connectées au moyen d'un manchon de connexion (23) et espacées axialement.
4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la roue dentée (28) est couplée avec une roue à actionnement manuel (30) au moyen d'un manchon (29).
5. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la connexion entre la roue dentée (28) et l'axe (3) du rouleau d'impression (1) est établie par un ergot (32) et pas des fentes axiales (31) pratiquées dans un manchon solidaire de la roue dentée (28).
6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le mécanisme d'entraînement (4,5) muni de têtons (15) est connecté au dispositif de telle sorte qu'il constitue un module amovible ou enfichable.
7. Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que la commande pas-à-pas est constituée par un moteur d'entraînement pas-à-pas (20).
8. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le premier organe d'accouplement (24) comporte des échancrures (25) et le second oegane d'accouplement (26) des dents (27) pouvant s'insérer dans les échancrures (25).
9. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le mécanisme d'entraînement (4, 5) muni de tétons (15) est connecté à l'ensemble de pignons (19, 23, 22) au moyen de deux roues dentées (17, 18).
10. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on a prévu des ressorts de freinage du papier (35) en forme d'arc, adjacents au rouleau d'impression (1), et/ou des rouleaux de pression (36) appliquant le papier contre le rouleau d'impression (1).
EP78101786A 1977-12-27 1978-12-20 Mécanisme de transport pour feuilles de papier ou bandes de papier continues dans une imprimante Expired EP0002796B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2758148 1977-12-27
DE2758148A DE2758148C2 (de) 1977-12-27 1977-12-27 Papiertransportvorrichtung für den Transport von Einzel- oder Endlosformularen in einem schreibenden Gerät

Publications (2)

Publication Number Publication Date
EP0002796A1 EP0002796A1 (fr) 1979-07-11
EP0002796B1 true EP0002796B1 (fr) 1981-09-02

Family

ID=6027374

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78101786A Expired EP0002796B1 (fr) 1977-12-27 1978-12-20 Mécanisme de transport pour feuilles de papier ou bandes de papier continues dans une imprimante

Country Status (5)

Country Link
EP (1) EP0002796B1 (fr)
JP (1) JPS5492815A (fr)
CA (1) CA1085426A (fr)
DE (2) DE2758148C2 (fr)
IT (1) IT1202808B (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH022604Y2 (fr) * 1981-01-21 1990-01-22
JPS5833486A (ja) * 1981-04-09 1983-02-26 セントロニクス・デ−タ・コンピユ−タ−・コ−ポレ−シヨン プリンタ−用給紙システム
JPS5829446U (ja) * 1981-08-20 1983-02-25 セイコーエプソン株式会社 プリンタの紙送り装置
DE3214549C2 (de) * 1982-04-20 1985-01-17 Siemens AG, 1000 Berlin und 8000 München Transportvorrichtung für randgelochtes Faltpapier und für Rollenpapier
DE3230190C2 (de) * 1982-08-13 1984-12-06 Siemens AG, 1000 Berlin und 8000 München Papiereinzugsvorrichtung für Druckereinrichtungen
DE3232875A1 (de) * 1982-09-02 1984-03-08 Mannesmann AG, 4000 Düsseldorf Papiertransportvorrichtung fuer drucker, insbesondere fuer matrixdrucker
GB2139149B (en) * 1983-03-04 1986-06-25 Canon Kk Sheet advancing device
SE446839B (sv) * 1984-03-01 1986-10-13 Philips Norden Ab Anordning for matning av kvitto och/eller journalremsa
DE3621512A1 (de) * 1986-06-25 1988-01-07 Siemens Ag Verfahren zur herstellung einer papiertransportwalze und deren verwendung in einer druckvorrichtung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1561310A1 (de) * 1967-03-10 1970-04-02 Sis S A Vorrichtung an Schreibmaschinen
US3753483A (en) * 1970-03-20 1973-08-21 Memorex Corp Typewriter dual feed apparatus
GB1369518A (en) * 1972-03-14 1974-10-09 Int Computers Ltd Web feeding apparatus
US3880016A (en) * 1974-03-07 1975-04-29 Qume Corp Variable displacement apparatus for platen and tractor feed
IT1022388B (it) * 1974-09-27 1978-03-20 Honeywell Inf Systems Meccanismo di trasporto carta per stampante a piu copie

Also Published As

Publication number Publication date
DE2861046D1 (en) 1981-11-26
DE2758148B1 (de) 1979-05-10
JPS5492815A (en) 1979-07-23
IT1202808B (it) 1989-02-09
CA1085426A (fr) 1980-09-09
DE2758148C2 (de) 1980-01-10
EP0002796A1 (fr) 1979-07-11
IT7830727A0 (it) 1978-12-12

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