DE1947580A1 - Device for the step-by-step advance of a type carrier carriage in electrically operated typewriters - Google Patents

Description

Device for the step-by-step advance of a type carrier trolley in electrically operated typewriters

The invention relates to a device for stepwise Advance of a type carrier carriage along the line of an f, u lettering Aixf drawing carrier in electrically operated Typewriters or teleprinters.

With electric typewriters and teleprinters, the feed movement is along the line -be it on the one to be moved Paper trolleys or be it on the type carrier trolley to be moved Motor-driven step-by-step movement processes are transferred to the part to be moved. At the same time a Spring element pulled up, which the energy stored during the step-by-step feed phases to return the Vv; egte Great things in the starting position at the beginning of a line.

AuiSor the possibility of step-by-step advancement of the to be moved To partially cause Ln writing direction, an indexing mechanism used for this should be suitable for even with Exercise of a drive stroke by the supplying the drive force Drive organ of the advance of the part to be driven is prevented or that a backward directed step-by-step Feed is executable. In known arrangements, these tasks are solved by various Kliüksnschaltwerke which are usually complex in construction, complicated in their mode of operation and usually also subject to increased wear and tear, because during the pawl engagement, the step-by-step drive processes are transmitted in bursts *

It is the object of the present invention to provide a device to create a step-by-step advance of a type carrier trolley,

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which differs from the known devices It is characterized by simplicity and low wear and tear.

Such a device is according to the invention characterized in that a tape tension with one end fixed and with the other end via a spring element elastic with the sohrjttweise to be driven type carrier car connected and between two in the feed direction which do not impede the belt tension and which lock the belt tension against the advance direction Riohtgesperren by an extending the belt route Drive organ can be influenced.

The advantage of a drive device configured in this way is primarily that the step-by-step drive processes do not take place in jumps via a gear shift transmission or other complex transmissions, but only as a path change component to extend the length of the belt tension. The drive element interacts reciprocally with the resilient element via which the belt pull is connected to the type carrier trolley to be driven. If the belt section of the belt tension is extended by the drive element against the forces of this peder element between the two directional locks, the directional lock arranged in front of the drive element in the feed direction is ineffective and the belt tension is tightened from this side while it is pulled by the one behind the feed element Richtgesperre is held. If the belt tension is then relieved again by the drive element, it is stretched again by the spring element acting on it, the belt tension being held on the directional lock arranged in front of the drive element in the feed direction and released for further transport by the other directional lock arranged behind the feed element. After such a work cycle, a feed phase is ended and another can take place in the same way. Compared to this functional sequence, a feed phase can also be carried out with the relieving of the

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Voraohubbandzuges begin through the feed member, whereupon
then again the extension of the tape pulling path through the
Antriobsorgan takes place against the force of the spring. In djoniMTi FaLI, the directional lock gears work in reverse order.

Ka is advantageous in the context of the feed direction according to the invention that the end of the Bani-7.ugoo lying in the feed direction is fixed and the other end of the belt is elastic at the
Type carrier trolley to be driven step by step is attached. I) iettP assumption is advantageous because the part of the belt tension lying in the feed direction has to absorb the tension forces of the Wr, ^vr enrijcki'.ugfoder. This carriage return spring is
So not able to change the desired exact position of the T - trrigor wagon during the type imprint to ν, which would possibly be so if the resilient element between the type carrier car and the belt pull were arranged in the direction of advance of the type carrier car.

According to a preferred embodiment, the device according to the invention is implemented characterized in that means for releasing one of the Directional lock from the belt tension is arranged along the direction of feed are. In this context, the optionally releasable directional lock between the one that extends the belt path is advantageous Organ and the resiliently attached to the type carrier carriage to be driven gradually end of the belt pull.

By releasing one directional lock from the belt tension during a work cycle of the drive member or at least during the phase in which this directional lock would be effective, a feed prevention is achieved, i.e. the length compensation can take place in both directions in the area of this released directional lock, while the second directional lock changes the position of the tape tension fixed. If the directional locking mechanism, which is arranged between the resilient element of the strip tension and the drive member during a pre chubzykluB dissolved, so does the

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Type carrier wagons to be driven during this cycle are none Moving in and out with.

According to another preferred embodiment, the device according to the invention is characterized in that means for ionizing both directional locks from the strip tension are arranged. With a device designed in this way, it is possible to carry out individual backward feed steps on the type carrier carriage. It is necessary that the two directional locks are released alternately during the operating phase, in which the hand 7.ug would be prevented from length compensation by the change in length between the two H ic; h L, "; esperren by the corresponding directional lock - /. ugfeder is transported back in the following way, the type carrier carriage by one step, controlled by the course of movement of the drive element would be, ύοπ this tape tension is released, the other locking mechanism on the tape tension is effective to prevent uncontrolled running back of the tape tension. Both directional locks are only released when a return of the type carrier car is to take place in the initial position of the writing line so that the return spring acting on the type carrier car can pull the type carrier car back unhindered into this starting position.

Kin simple technical structure for the device according to the invention results when this is advantageously characterized by the fact that as a directional lock with the toothed belt trained belt tension via toothed rollers in positive engagement standing ratchet wheels with saw teeth and with these directionally cooperating locking pawls are arranged.

In order to create the possibility to use the type carrier trolley through the with him attacking return spring in the line start position

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to transport back is an extension of the invention Device advantageous in that the latches are mounted on a pivotably mounted lever and through this with their locking tips on in the area of Ras trjirior arranged scenes and thus are displaceable from the area of the teeth of the locking wheels. It is moving on In this context it is advantageous to use the lever carrying the latches via a close to the extended position iο force of a spring applied to a fixed stop, to adjust from this extended position to the dead center deflectable toggle joint. The energy of the in the beginning of the line returning type carrier car and the force

will
against the return spring / to stretch the toggle joint

the force of the spring acting on the pivot lever is used.

The device according to the invention is preferred to that effect further developed that the elastic with the step-by-step to be driven Type carrier trolley connected end of the belt line rigidly with a movably arranged on the type carrier trolley Type carrier is connected. Without separate components oäo: measures is achieved in that the type carrier durcii the interaction of the drive member with the resilient element during the printing phase in front of the printing point of the recording medium is lifted and is otherwise held in a position in which the type carrier releases the view of the pressure point.

Exemplary embodiments of devices constructed according to the invention are described below with reference to the drawing. Show it:

Pig.1 a simplified representation of a structure of the device, '

Pig.2 the control mechanism for the directional lock,

Pig. 3 this control mechanism in the position that it assumes in the event of a carriage return,

Pig. 4 to 7 adjustment stages of the drive element and both Adjacent directional lock at normal feed rate,

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'I' ¹ j K. H b1 R 1] K ins to! Is tad i en of the drive organ and the two d.'i '/ u adjacently arranged directional lock at the Vor-Hchii bun te rb i rid un ^,

Kig.l? bia 1 ') K inn Io 1 in tad i en der. To trietujorgans and both of them adjacently arranged directional lock for execution one directed against the usual feed direction Movement step,

H \ ig.16 a simplified representation of a gear structure, which via the one provided for the feed of the type carrier carriage Tape train allows a height adjustment of the type carrier in the imprint position.

In Pig.1, box 1 represents the type carrier wagon, which is to be transported step by step in the direction of the arrow via a tape pull 2 along the line of a recording medium. This movement a spring 3 counteracts by means of which the type carrier carriage 1 is returned to the starting position at the beginning of a line can be. In the feed direction, the belt pull 2 is attached directly to the type carrier carriage 1, while the other end this belt pull 2 is coupled to the type carrier carriage via a spring 4 in the opposite direction.

The switching mechanism for the step-by-step drive of the type carrier car 1 consists of two tooth alignment locks, each of which consists of a toothed wheel 5,6 meshing with the belt tension 2 and a ratchet wheel 7,8 firmly connected to it, in which, depending on the direction, a ratchet lever 9,10 is spring-loaded , consists, and a drive member 11 which is reciprocated in the direction of the arrow and is designed as a roller.

Tn Fig.2 the storage and influencing possibilities of the latches 9,10 are shown. By means of an armature 12 of an electromagnet (not shown) , the latching pawl 9 and by means of an armature 13 of an electromagnet 14, the latching pawl 10 can be individually pivoted out of its associated ratchet wheel 5 and 6, respectively.

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Heide locking pawls 9,10 are suf a pivot lever I ^r . ■ ·> - la, "!! '!'!." By releasing a stop acting on the lever \ b via a toggle joint 17, the two latches Q, 10 in the area of the pastrMder 7, · ^. · "■ - will hold the knee joint 17 by a trigger member 19 via Meint ¹ Bohwerpunk ti ausseienkt age, so the spring can the lever 1 ^c), and thus 16, the lever locking the two swivel 9,10, wherein the Kasthebel 9,.. 10 run up on Führun ^ skulissen 20,2 1 and are brought out of the range of Ras trader 7,8 by this (Fig. "^). l'a now both directional locks are overridden, the type carrier carriage 1 is returned to its starting position due to the force of the spring 3 acting on it, in which it punctures the two toothed directional locks again by moving on a lever arm of the toggle lever, ^ elenko 17 acts to attach this toggle joint to the Λ η sc hl ag 18 again.

The actual mode of operation of the feed mechanism with a simple step-by-step feed is shown in FIGS. In FIG. 4, the belt tension is strongly deflected against the spring 4, which is no longer shown, between the two gears 5, 6. The two locking ^v el, el 9 "10 are engaged into their associated locking wheels 7.8. When the drive roller 11 is moved in the direction of the arrow (FIG. 5) , the tension belt 2, which is designed as a toothed belt, is held over the tooth alignment lock 8, 10, while it is pulled over the gear 5 by the tensile force of the spring 4, until after a feed division of the locking lever 9 again in the locking wheel 7 engages (Fig. 3). The drive roller is then moved in the opposite direction in the direction of the arrow (FIG. 4) , and thus again deflects the tension band 2 more strongly. The directional lock 7, 9 is now effective and the directional lock 8, 10 ineffective, so that the tension band is pulled over the gear 6 until a position shown in FIG. 4, but advanced by one tooth pitch, is achieved. A feed stroke has now finally been exerted on the type carrier carriage 1.

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the feed on the type carrier carriage 1 during .eines Working cycle of the drive roller 11 are prevented, so it is necessary that the pawl during this working cycle is lifted by the armature 12 during this work cycle from the area of the associated ratchet wheel 7, as this is shown in FIGS. 8 to 11. The compensation of the belt tension during the to-and-fro work cycle the drive roller 11 takes place exclusively via the gearwheel 5, while the type carrier carriage 1 takes place via the gearwheel 6 and the band pull 2 acting directional lock 8,10 remains unchanged in its position.

In the case of a step-by-step carriage return, the drive phases of which are shown in FIGS. 12 to 15, the latch 10 is lifted out of the associated latching wheel 8 by the magnet armature 13 before the drive roller 11 begins to move, until the drive roller 11 is about halfway in the direction of the arrow (Fig. 13). The gear wheel 6 can rotate counterclockwise under the influence of the carriage return spring 3 and the type carrier carriage is set back by one step, while the tooth alignment lock 7, 9 remains effective. Shortly before the reversal of movement of the drive roller, the pawl 10 is released again by the magnet armature 13 and the directional lock 8, 9 becomes effective again. At the same time, the effect of the directional locking mechanism 7, 9 is canceled by the armature 12 lifting the locking lever 9. Without a repeated movement of Type carriage 1 to cause, the return stroke of the drive roller is performed, and the balance of the tape tension is effected unhindered through the gear 12, to the position shown in Fig.12 starting position -jedoch now by one tooth pitch zurückversetzt- is reached again.

16 shows, in simplified form, a gear for advancing the type car 1 step by step along a line to be labeled, expanded by a gear for adjusting the height of the type carrier 22 »PA 9/411/1390 arranged on the type carrier

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In order to be able to raise and lower the type carrier on the type trä; -'- r "" - WiifiPn 1 without additional transmission means, the edge of the belt pull 2, which is plastically connected to the type carrier car via a jjp spring, is rigid nil " connected to the type carrier 22. A lifting movement of the type carrier? '"." is carried out when the drive roller 11 alone yields together with one or both deflection rollers 23, 24, whereby the lifting movement can be carried out by the spring 4. Various lifting movements of the type carrier 22 can thereby be achieved that, if necessary, one of the two Umlonkrollen 23,24 or both deflecting rollers 23,24 by non .Wr- f.tiit said locking members are held so as to n. _t.-hl of the movement of the levers 25,26 in the Nockental of Can follow cam.

11 claims
16 figures

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Claims (1)

Claims, Device for the step-by-step advance of a type carrier trolley along the line of a recording medium to be labeled in electrically operated typewriters or teleprinters characterized in that that a tape pull (2) is fixed at one end and elastic at the other end via a Peder element (4) with the type carrier trolley to be driven step by step (1) connected and between two in the feed direction the tape tension (2) non-hindering and opposite to the feed direction the tape tension (2) arresting directional locks by a die Drive member (11) extending the belt path can be influenced is. 2. Device according to ^A nsprueh 1, characterized in that the end of the strip (2) lying in the feed direction is fixed and the other end of the strip (2) is elastically attached to the type carrier carriage (1) to be driven gradually. 3. Device according to one of claims 1 or 2, characterized characterized in that means (12) for releasing one of the directional locks from the tape pull (2) counter to the feed direction are arranged. 4. Apparatus according to claim 3, characterized in that the optionally releasable directional lock is arranged between the member (11) which extends the belt section and the end of the belt pull (2) which is resiliently attached to the type carrier carriage (1) to be driven step by step. 5. Device according to one of claims 1 or 2, characterized characterized in that means (12, 13) are arranged for the optional release of the two directional locks from the belt tension (2). PA 9/411/1390 -11- 109813/0956. 33AD original. · (>. Device according to one of Claims 1 or 2, characterized in that means are arranged for simultaneously releasing the locking mechanism from the belt pull (2). 7. Device according to one of claims 1 to 5, characterized ρ ο k ennzei chnet that as a directional lock with the belt pull (2) designed as a toothed belt via toothed belt pulleys (5,6) positively engaged Ras trader (7,8) with saw teeth and with these independent of direction cooperating latches (9,10) are arranged. 8. Device according to claims 6 and 7, characterized in that the Rastklihken (9 »10 ^ mounted on a pivoted lever (3) and ' through this with their locking tips on in the area of the locking wheels (7, 8) arranged links (20, 21) and thus are displaceable from the area of the teeth of the ratchet wheels (7, 8). 9. Apparatus according to claim 8, characterized in that the latching pawls (9, 10) carrying the lever (15) via a near the extended position by the force of a spring (16). toggle joint (17) resting against a fixed stop (18) and deflectable from this extended position beyond the dead center position is adjustable. - 10. The device according to claim 9, d ad u rch characterized in that the toggle joint (17) against the force of the spring (16) by the energy of the type lever carriage (1) returning to the line start division can be stretched. PA 9/411/1390 -12- SAD ORIGINAL 109813/0956 11. Device according to one of claims 1 to 6, d adurch marked that the elastic with the type carrier car to be driven step by step (1.) Connected end of the belt pull (2) with a type carrier movably arranged on this (22) is connected. 109813/0956