EP0223036A2 - Couplage pour dispositif d'alimentation en papier dans une machine de bureau et dispositif en faisant usage - Google Patents

Couplage pour dispositif d'alimentation en papier dans une machine de bureau et dispositif en faisant usage Download PDF

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Publication number
EP0223036A2
EP0223036A2 EP86113766A EP86113766A EP0223036A2 EP 0223036 A2 EP0223036 A2 EP 0223036A2 EP 86113766 A EP86113766 A EP 86113766A EP 86113766 A EP86113766 A EP 86113766A EP 0223036 A2 EP0223036 A2 EP 0223036A2
Authority
EP
European Patent Office
Prior art keywords
rotation
driver
cutouts
clutch
cutout
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.)
Withdrawn
Application number
EP86113766A
Other languages
German (de)
English (en)
Other versions
EP0223036A3 (fr
Inventor
René Steinmetz
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.)
Rutishauser Data AG
Original Assignee
Rutishauser Data 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 Rutishauser Data AG filed Critical Rutishauser Data AG
Publication of EP0223036A2 publication Critical patent/EP0223036A2/fr
Publication of EP0223036A3 publication Critical patent/EP0223036A3/fr
Withdrawn legal-status Critical Current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
    • B41J23/00—Power drives for actions or mechanisms
    • B41J23/02—Mechanical power drives
    • B41J23/025—Mechanical power drives using a single or common power source for two or more functions
    • 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

Definitions

  • the invention relates to a coupling according to the preamble of claim 1 and a device with a plurality of such couplings.
  • the record carriers can be single sheets or envelopes, for example, and are simply referred to below as sheets for simplification.
  • a separating device usually has at least one separating roller which frictionally engages the stack of sheets and, as is known, also serves for feeding the sheets into the feed nip of the platen roller.
  • Such a device containing clutches is intended to be placed on an office machine, for example on a typewriter or on a typewriter, and is also driven by the drive of the platen roller.
  • the platen is coupled to a reversible drive, the direction of rotation of the platen in the sheet feeding direction is referred to as the forward direction of rotation and the opposite direction of rotation as the reverse direction of rotation.
  • the directions of rotation mentioned in the explanation of the coupling correspond to those of the platen roller.
  • a coupling of the type mentioned in the preamble of claim 1 is known from DE-PS 29 50 707.
  • This known coupling between the driver and the output shaft has connecting elements for engaging a locking lever, a control disc, a driving pin arranged on the control disc, a driving disc and an associated overrunning clutch. If it is taken into account that the overrunning freewheel also consists of a number of individual parts, the outlay on connecting elements is relatively great.
  • this known clutch is not suitable for producing graphical representations in which the platen roller has to be turned back and forth for the recording process, because the clutch would engage again after one revolution in the reverse direction, for example.
  • the device known from the cited publication is furthermore disadvantageous in that the platen roller has to be reversed three times in order to drive the separating device after the third reversal while the platen roller is running in reverse.
  • Such a function means that the sheet that is fed cannot be drawn in by the platen during the feeding process, so that it is stopped at the platen of the platen and bulged out by the feed of the separating device. Only when the platen roller is reversed further in the forward direction of rotation is the sheet transported by the platen roller.
  • the invention has for its object to provide a clutch of the type mentioned, but in a simple and space-saving design, which allows a reverse rotation over several revolutions without engaging.
  • the coupling should be suitable for plotting and its diameter should not depend on the number of revolutions possible in the reverse direction of rotation.
  • a device suitable for several magazines is to be created, in which the separating device after only reversing the platen roller twice during the forward run.
  • the coupling according to the invention according to claim 1 ensures that a state in which the driver does not cause a clutch is produced in the event of a reverse rotation beyond said predetermined angle of rotation, so that the platen roller can be rotated back and forth to produce a graphic representation.
  • the pawl arrangement not only forms a link of the drive connection, but also replaces the overrunning clutch required in the known embodiment.
  • An embodiment according to claim 3 enables the driver to engage the steep driving flanks to produce a rotary connection and to come out of the cutouts on the inclined outlet flanks.
  • the first release cutout in the blocking element serves in the same sense as the first take-out cutout in the intermediate element for producing a starting position by the driver for both elements.
  • the steep entrainment flank in the second release cutout of the locking element serves to entrain the locking element in the reverse direction of rotation.
  • the inclined The outlet flank of the second release cutout serves to return the driver in the direction of its starting position.
  • An embodiment according to claim 5 enables the entrainment to take at least two full revolutions in the backward direction, with the locking element being adjusted by one step for each revolution, both in the forward and in the backward direction of rotation.
  • Such an embodiment makes it possible, for example, to move the platen roller in the reverse as well as in the forward direction of rotation by a full sheet length without actuating the clutch.
  • the intermediate element can be rotated in the forward direction as desired at the input position of the driver without a drive connection to the output shaft.
  • An embodiment according to claim 7 ensures that one of the three pawls engages within a smaller pitch than the pitch of the toothing. This ensures extremely little play when the latch arrangement engages.
  • An embodiment according to claim 8 describes an advantageous structure of the coupling elements, wherein the friction of the gear element on the other elements is low, but there is a frictional connection between the locking element and the intermediate element in order to ensure the relative position produced by the driver between the intermediate element and the locking element.
  • the control element is on both sides bordering elements freely rotatable within its functional area.
  • the gear element forms a termination for the remaining coupling elements, so that they are protected without an additional housing.
  • Claim 11 describes a device with a plurality of couplings, which enable the selective feeding of, for example, letterhead and envelopes from different magazines.
  • An embodiment of the device according to claim 11 ensures an exact positioning of the supplied recording medium at the feed nip of the platen roller.
  • the coupling to be set to different predetermined angles of rotation has completely identical parts except for the locking element.
  • the coupling 12 shown in longitudinal section in an enlarged scale in FIG. 1 is used to selectively establish a drive connection from a platen roller 16, which can be driven by a drive 14, to a separating device 18, which is represented by a friction wheel, around the top sheet of a magazine 20 arranged stack 22 to feed the platen.
  • a separating device 18 which is represented by a friction wheel, around the top sheet of a magazine 20 arranged stack 22 to feed the platen.
  • the clutch can be engaged and disengaged by reversing the direction of rotation of the actuator 14.
  • the platen roller is connected on the one hand via gear elements 24 to the drive 14 and on the other hand via gear elements 26 and 28 to the clutch 12.
  • the gear element 28 is a pinion meshing with a gear 30 of the clutch 12.
  • the clutch 12 has an output shaft 34 which is mounted in a frame 32 and is connected in a rotationally fixed manner to the separating device 18.
  • a hub 38 having a flange 36 is arranged in a rotationally fixed manner, which serves as a carrier for the coupling elements.
  • the following elements are freely rotatably mounted on the hub 38 in sequence: the gear wheel, 30 a locking disk 40, a control disk 42 and a switching wheel 44. These elements are prestressed against a locking ring 48 by a friction spring disk 46 arranged on the hub 38. Between the gear 30 and the locking disk 40, a spherical ring 50 is arranged to reduce friction between these two elements.
  • the ratchet wheel 44 has axial extensions 52 extending through the control disk 42, the end faces of which produce a friction connection with the locking disk 40. Three pieces of the axial extensions 52 are evenly distributed over the circumference and also serve as spacers, so that the control disk 42 is freely supported between the switching wheel 44 and the locking disk 40.
  • the gear wheel 30 has a jacket-shaped extension 54, with which it encloses the other elements of the coupling.
  • a pin 56 is arranged on the locking disk 40, which protrudes into a recess 58 arranged in the control disk 42, so that the relative movement between the locking disk 40 and the control disk 42 is limited by the size of the recess 58.
  • the recess 58 ends with a stop surface 60.
  • a toothing 62 is arranged on the circumference, which for driving connection in one direction of rotation by means of three clinches 44 mounted in the switching wheel 44 ken is determined, of which only one pawl 64 is visible in cross-section at its bearing point.
  • a pin 66 arranged on the switching wheel 44 is used for storage.
  • a spring 68 can be seen, which generates the pretension for a driver to be described in connection with FIG. 2.
  • the profile 45 of the switching wheel 44 can be seen in the cross section according to FIG. 2. Of this profiling, only the three axial extensions 52, 52 ⁇ and 52 ⁇ extend through the cross-sectional area.
  • a total of three pawls arranged at 120 ° from one another are provided, of which the two not shown are mounted around the bearing journals 66 ⁇ and 66 ⁇ .
  • the arrangement of these pawls 64 and the toothing 62 are coordinated with one another in such a way that only one pawl is in engagement in each case in order to maintain a finer division.
  • the pawls 64 can be disengaged from the toothing 62 by actuating arms 72, 72 ⁇ and 72 ⁇ if the actuating arms which extend in the axial direction are moved clockwise relative to the switching wheel 44.
  • the actuating arms 72, 72 ⁇ and 72 ⁇ extend according to FIG. 1 from the control disk 42 through the cross-sectional area of FIG. 2.
  • the cross section according to FIG. 3 also represents a top view of the control disk 42.
  • the axial extensions 52, 52 ⁇ and 52 ⁇ of the switching wheel 44 extend through recesses 76 in the control disk 42, which recesses the spaces are between the three operating arms 72, 72 ⁇ and 72 ⁇ .
  • 3 shows the circumferential extent of the recess 58, into which the pin 56 of the locking disk 40 projects, which pierces the cross-sectional area.
  • FIG. 3 also shows the relative position between the stop surface 60 of the control disk 42 and the flank 81 defining the starting position on the switching wheel 44.
  • the distance of the abutment surface 60 from the flank 81 reveals that the control disk 42 is adjusted counterclockwise relative to the starting position, so that the pawls 64 are in engagement. If the control disk 42 is turned clockwise until its stop surface 60 lies in one plane with the flank 81 of the switching wheel 44, then the pawl 64 is disengaged from the toothing 62 by the actuating arm 72. Such a state is brought about by the driver 74 when it has left its illustrated position and is moved clockwise in the direction of the flank 81.
  • the circumferential extension 58 in the control disk 42 sets the scope within which the pin 56 and with it the locking disk 40 (not shown in FIG. 3) can be moved.
  • the cross section according to FIG. 4 shows a top view of the locking disk 40 with the spherical ring 50 inserted.
  • 5 has a first driving cutout 80, a second driving cutout 82 and further driving cutouts 84 and 86.
  • the clockwise arrow 88 indicates the forward direction of rotation, which corresponds to the sheet feed direction of the platen roller 16 shown in FIG. 1.
  • the driver cutouts 80, 82, 84 and 86 have 88 driver flanks 81, 83, 85 and 87 in the forward direction of rotation.
  • the assigned inclined discharge flanks arranged in the reverse direction of rotation are designated 81 ⁇ , 83 ⁇ , 85 ⁇ , and 87 ⁇ .
  • the flanks 81 correspond to the starting position indicated in FIG. 3.
  • the driving cutout 80 serves to establish a relative position between the driver 74 and the switching disc 44.
  • the second driving cutout 82 is offset from the first driving cutout 80 by a predetermined angle of rotation and, with its steep flank 83, is used for engaging.
  • the other driving cutouts 84 and 86 have different predetermined rotation angles and are intended for the production of individually controllable clutches in one and the same device, for example if recording media, such as letterhead and envelopes, are made from different Magazines of the platen roller are to be fed selectively. However, only a single one of the driving cutouts 82, 84 or 86 is determined for each clutch. As will be explained below, only the driving cutout that can be released by the locking disk is effective.
  • the ratchet wheel 44 has a further cutout 90 with flanks 91 and 91 ⁇ which are inclined on both sides at a point offset on the circumferential side relative to the above-mentioned points.
  • Line 0 in FIG. 5 denotes the starting position of the switching wheel 44.
  • 6 shows the locking disk 40, the diameter of which corresponds to that of the ratchet wheel 44. With 0 ⁇ the reference line is designated, which corresponds in the starting position of the driver 44 with the reference line 0 according to FIG. 5.
  • the locking disk 40 has release cutouts 92 and 94 which correspond to the drive cutouts 82 and 84 of the ratchet wheel 44 according to FIG. 5.
  • first release cutout 92 is circumferentially shorter than the first take-out cutout 80 in the switching wheel 44, its flanks 93 and 93 ⁇ are arranged in the same way as those of the first take-out cutout 80.
  • the flanks 95 and 95 ⁇ of the second release Cutout 94 are arranged opposite to those of the second takeout cutout 82.
  • the locking disks 40 are the only different components of the clutches in a device with multiple clutches.
  • the release cutout 94 corresponds to the take-out cutout 82 of the shift wheel 44.
  • the locking disk 40 can thus have either only the release cutout 94 or one of the release cutouts 96 or 98, for example shown and indicated by dashed lines, to prevent the driver 74 from engaging in one of the drive cutouts 82, 84 or 86 of the ratchet 44 to allow.
  • the specified predetermined angle of rotation for each clutch is dependent on the arrangement of the corresponding release cutout.
  • the locking disk 40 has two entrainment cutouts 100 and 102, offset on the circumference, each with steep entrainment flanks 101 and 101 ⁇ or 103 and 103 ⁇ on both sides.
  • FIG. 7 shows the starting position in which the driver 74 engages in the driver cutout 80 of the ratchet wheel 44 released by the release cutout 92 of the locking disk 40 and in the case of forward rotation 88 of the gearwheel 30 with its driver element 75 ′ both on the driving flank 81 of the driver cutout 80 as well as on the flank 93 of the release cutout 92.
  • the driver 74 presses with its driver element 75 ⁇ against the stop surface 60 of the control disk 42, which in turn, with its actuating arms 72, 72 ⁇ and 72 ⁇ , disengages the pawl arrangement 64 against the action of the springs 70 from the toothing 62 of the hub 38.
  • This is the normal operating position, in which the platen roller 16 can be rotated forward as desired according to FIG. 1 without the clutch 12 responding.
  • the driver With a further backward rotation of the gearwheel 30, the driver now engages in the cutout 102 in the locking disk 40 in order to turn it back according to FIG. 9 by a further angle of rotation. 9 that the driver 74 is prevented from engaging in the cutout 80 of the switching wheel 44 by the locking disk during a further backward rotation.
  • the driver After a second rotation, the driver now engages in the recess 100 of the locking disk in order to move it back by a further step according to FIG. 10 close.
  • the driver can now be turned back again by almost a full revolution according to FIG. 10, but may no longer engage in the cutout 100, since otherwise one revolution is lost during the subsequent forward rotation. If the driver is rotated from the position shown in FIG. 10 again in the forward direction, then the locking disk 40 is gradually reset by engaging in the cutout 100 and after a further rotation in the cutout 102 Fig. 8 corresponds. 8 that the driver 74 can now reach its starting position again.
  • the permissible reverse angle of rotation of the gearwheel 30 without the clutch engaging within this range with any forward and backward movements corresponds to the length of a sheet to be labeled, so that any graphic representations on the platen roller are possible within this range.
  • the clutch can be used wherever a control for engaging and disengaging is to be effected solely by reversing the direction of rotation and turning back by a predetermined angle of rotation.

Landscapes

  • Mechanical Operated Clutches (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
EP86113766A 1985-11-19 1986-10-04 Couplage pour dispositif d'alimentation en papier dans une machine de bureau et dispositif en faisant usage Withdrawn EP0223036A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4933/85A CH673322A5 (fr) 1985-11-19 1985-11-19
CH4933/85 1985-11-19

Publications (2)

Publication Number Publication Date
EP0223036A2 true EP0223036A2 (fr) 1987-05-27
EP0223036A3 EP0223036A3 (fr) 1989-01-18

Family

ID=4285059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113766A Withdrawn EP0223036A3 (fr) 1985-11-19 1986-10-04 Couplage pour dispositif d'alimentation en papier dans une machine de bureau et dispositif en faisant usage

Country Status (3)

Country Link
US (1) US4799813A (fr)
EP (1) EP0223036A3 (fr)
CH (1) CH673322A5 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0422794A3 (en) * 1989-10-13 1991-11-21 Hewlett-Packard Company Printer with carriage-actuated clutch and paper-feed mechanism

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4940348A (en) * 1988-09-15 1990-07-10 International Business Machines Corporation Platen controlled sheetfeed permitting back-up for erasure
JPH03238242A (ja) * 1990-02-09 1991-10-24 Chinon Ind Inc 給紙装置
US5178378A (en) * 1990-02-09 1993-01-12 Chinon Kabushiki Kaisha Paper feeder

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2816442C2 (de) * 1978-04-15 1981-12-17 Helmut 7210 Rottweil Steinhilber Vorrichtung zum Zuführen von Einzelblättern von einem in einem Magazin gespeicherten Papierstapel zur Schreibwalze einer Büromaschine
DE2950707C3 (de) * 1979-03-20 1981-12-10 Helmut 7210 Rottweil Steinhilber Vorrichtung zum Zuführen von Einzelblättern von einem in einem Magazin gespeicherten Papierstapel zur Schreibwalze einer Büromaschine
US4475731A (en) * 1982-12-17 1984-10-09 Centronics Data Computer Corp. Programmable, mechanical system for feeding cut sheet paper to a printer
EP0157735A3 (fr) * 1984-04-02 1988-09-14 Kurt Rünzi Dispositif d'alimentation de feuilles vers le rouleau d'une machine de bureau
US4570919A (en) * 1984-05-23 1986-02-18 Qume Corporation Selector for multibin sheet feeder
DE3441487A1 (de) * 1984-11-13 1986-05-22 Ricoh Co., Ltd., Tokio/Tokyo Papierbogen-zufuehrvorrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0422794A3 (en) * 1989-10-13 1991-11-21 Hewlett-Packard Company Printer with carriage-actuated clutch and paper-feed mechanism

Also Published As

Publication number Publication date
EP0223036A3 (fr) 1989-01-18
CH673322A5 (fr) 1990-02-28
US4799813A (en) 1989-01-24

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Inventor name: STEINMETZ, RENE