DE2023362A1 - Printing device, in particular typewriter or receipt printer - Google Patents

Description

Printing device, in particular typewriter or receipt printer "Die The invention relates to a printing device, in particular a typewriter or receipt printer, namely with electronic control, with at least one type carrier, one Paper carriers and a paper conveyor as well as with moving devices for direct or indirect displacement and / or rotation and / or pivoting these parts.

Such printing devices are known which have a central Have drive for all moving parts. This is necessary because of the large number Transmission systems very complicated to deal with the diversity of the individual movements between the moving parts and the central drive. Such a facility is very involved as a result built up, cumbersome to operate and very prone to failure. An adaptation of the movement processes to changed working conditions is only possible with difficulty, if at all. An automatic control the workflow is also difficult to achieve.

The task of the invention is to provide a printing device of the type described at the beginning To create a way that is simply structured, works quickly and precisely, and is simple Way is automatically controllable.

The object is achieved according to the invention in that each movement device for each linear or rotary or

Pivoting movement has its own electric stepper drive device assigned.

In the printing device according to the invention, each movement device is directly or at close range by means of a simple transmission element from the respective stepper drive device moved here. This reduces the number and size of the transmission elements to a minimum.

This makes the printing device simpler in structure and considerable less susceptible to disturbance. It also works quieter. One particular advantage is to see in the fact that the individual movements are much faster, some of them even can take place at the same time. Furthermore, all stepper drive devices switch from an electronic control system, creating a perfect automatic Operation is guaranteed. This is even easier than a stepper drive device precisely limited movements allowed.

A changeover of the Druckeinrichtudg to other work tasks is easy to achieve by reprogramming the workflow.

It is already known one or the other sequence of movements to be effected by a separate drive during a printing process. In particular for setting the desired types are already provided by stepper drive devices adjustable type carrier known.

As long as the majority of the movement sequences during the printing process are driven centrally, the advantages described above cannot be achieved.

It is advantageous to have at least for all movement devices variable step numbers the stepper drive devices from stepper motors. These can be interpreted in their services according to the respective needs and allow a simple transmission of motion with a simple structure and precise operation.

For the movement devices, each only having one movement step cause constant size, the stepper drive devices can act as electromagnets be trained.

Their structure and their control is thereby further simplified and the speed of movement increased.

In a preferred embodiment of the printing device according to the invention is a known cylindrical type carrier on the shaft of a type setting stepper motor arranged and the type setting stepper motor for printing movement around a transverse axis pivoted. The rotary motion of the type setting stepping motor thus becomes transferred to the type carrier without translation. Because of that, and because of the type setting stepper motor takes part in the pressure movement, the period between two attacks is advantageous small.

In one embodiment of the printing device according to the invention, which is intended in particular for printing receipts, is on the shaft of the type setting stepper motor One type carrier is arranged on both sides of the transverse axis. Both type carriers are at the same time by moving the type setting stepper motor to the same or different types that are permanently assigned to each other can be set. With a double swivel of the type setting stepper motor around the transverse axis only one can and then brought the other type carrier to the stop and thus in a faster time As a result, a double pressure can be achieved The type setting stepper motor is advantageous associated with its pivoting movement about the transverse axis causing electromagnet. The pressure movement, which requires a constant angular deflection, can be applied to this Way to steer particularly quickly.

The type carrier can be adjusted axially to the type setting stepper motor be. Two or more series of types can then be arranged one below the other on the type carrier of which the one having the desired character due to the axial displacement is brought into the stop position. The axial displacement can be simple Wise cause by the fact that the type carrier is rotatably attached to a lifting rod and this is slidable in the hollow shaft of the type setting stepper motor. the The lifting rod can be displaceable by means of an electromagnet, in particular if the type carrier has only two type series, the axial displacement in both Directions is therefore only a constant distance.

In a preferred embodiment of the invention Printing facility is to transfer the rotary movement of the type setting stepper motor to the type carrier a carrier wheel is fixedly arranged on the shaft of the motor and the type carrier is with this carrier wheel can be detachably connected. If the printing task is changed, the type carrier is easily exchangeable in this way. Furthermore, the connection between the Train the carrier wheel and the type carrier in a simple manner so that an exact take-away of the type carrier guaranteed during the rotary movement without hindering the axial adjustment is. In the preferred embodiment, the carrier wheel and the type carrier for this purpose each cooperating plug-in elements. The plug-in elements can be arranged arbitrarily asymmetrically in order to achieve a distinctive assignment between the type carrier and the type setting stepper motor.

In addition to transmitting the rotary motion, the carrier wheel can also transmit further Perform functions. It can have notches on the circumference, in which the pressure stop suitable braking elements can intervene to absorb the vibrations that occur. It can also be used for feedback and control of the type setting that has taken place one or more indicators have cooperating projections.

The type setting stepper motor is advantageous by means of its Transverse axis stored on a sliding carriage. The slide takes over the linear one Displacement of the type carrier, for example along a paper carrier. Since all stepper drive devices necessary for type setting the shifting movement participate, i.e. be able to work during the shifting step, the result is a economic use of time. Furthermore, there is no need for complicated adjustable transmission devices. If the carriage movement along a paper carrier is used to form lines, then takes place the shift favorably in the direction of the transverse axis.

For sliding, rotating and / or moving the slide of the paper carrier relative to the type carrier as well as for the paper feed are also each has its own stepper motor. The paper conveyor has a toothed belt drive moved by means of a stepping motor. The timing belt can advantageously have attack knobs at intervals on its outside, which corresponds to a longitudinal perforation of the paper strip to be conveyed. In order to an exact paper feed without slippage is guaranteed.

In a preferred embodiment for a receipt printer Paper along the length of the shaft of the type setting stepper motor at led along this. Together with the embodiment described above, in the case of the type setting stepper motor on both sides of the transverse axis a type carrier is arranged, double receipts can be printed. To complete these receipts the paper conveyor is arranged after the type carrier in the conveying direction Associated transverse perforation device and / or a separating device. Here can the transverse perforation device is arranged transversely to the paper conveying device, have a height-adjustable saw knife by means of an electromagnet. When lifting of the saw knife in a certain height relative to the paper strip cause the tooth tips perforating the paper. However, it is also optional by means of the electromagnet movable into a position causing the complete severing of the paper. The device thus allows the production of paper strips perforated at intervals, the production of individual pieces of paper or the production of individual receipts, which in turn has an additional perforation. For other printing tasks any perforation or separation can of course be omitted.

The printing device according to the invention can be a programmable, fully automatic have electronic control device for all stepper motors and magnets.

Each printing process can thus be carried out in an economical manner. By exchanging the programs, the printing device can be used for the most varied Purposes.

Embodiments of the invention are shown in the drawing. 1 shows a construction diagram of a printing device according to the invention in FIG perspective, partially broken view, FIG. 2 a supplementary detail 1 and 3 show a structural diagram of another embodiment of an inventive Printing device in a perspective view, FIG. 4 is a side view of a Printing device according to the invention, which essentially corresponds to the construction scheme according to Fig. 1 corresponds, and FIG. 5 shows a section through the printing device according to FIG. 4.

The printing device characterized in FIG. 1 by its structure has a cylindrical type carrier 1, on the jacket of which there are two circumferential series of types 2 are arranged one above the other. The type carrier 1 is rotatable on a hub rod 3 stored and by means of recesses 4 arranged on its underside on plug pins 5 of a carrier wheel 6 can be placed. The carrier wheel 6 is fixed to a hollow shaft 7 a type setting stepper motor 8 is attached.

The lifting rod 3 is in the hollow shaft 7 and through the carrier wheel 6 axially displaceable by a step that corresponds to the distance between the type series 2 is equivalent to. The shifting movement is effected by means of a stepping motor 9, which engages the lifting rod 3 via an eccentric 10 and a linkage 11. Of the For the sake of clarity, this arrangement is shown separately in FIG Fig. 1 only the stepping motor 9 and the eccentric 10 can be seen.

The type setting stepper motor 8 is rotated by means of a transverse axis 12 this is mounted pivotably on a slide 13. The pivoting movement through which the type carrier 1 to the stop with a type, against one acting as a paper carrier Roller 14 is pressed, is effected by a stepping motor 15.

It is coupled to a gear 16 that has a toothed belt 17th a gear 18 is moved, which is firmly seated on a stop shaft 19. The stop shaft 19, which has an asymmetrical profile, is on the slide 13 in a bearing 20 and acts on the type setting stepper motor 8 via a lever 21. The lever 21 and the bearing 20 are longitudinally displaceable on the stop shaft 19.

The carriage 13 is on guides 22 by means of bearings 23 parallel to Axis of the roller 14 is arranged displaceably. The drive for the sliding movement takes place by means of a stepping motor 24 via a belt drive composed of gears 25 and 26 and a toothed belt 27. The printing device also includes a stepper motor 28, which moves the roller 14 via a belt drive 29. Via the same belt drive 29 a paper conveyor, designated as a whole as 30, is driven, which has a special toothed belt 31 for the paper movement. He points to his Outside attack knobs 32, the spacing of which is not the longitudinal perforation the drawn paper strip. The attack knobs engage in this perforation and thus cause an exact paper feed.

The mode of operation of the printing device shown schematically in this structure is as follows: To print a certain type, a non-drawn programmable electronic control device the various driving step devices in such a way switched that the type setting stepper motor 8 the type carrier 1 via the carrier wheel 6 turns so far that the desired type comes into the stop position. Is the one you want Type arranged in a different type series than in the z. Currently located at the height of the stop, so the stepper motor 2 adjusts the type carrier in its height. The stepper motor 24 moves the carriage 13 into the desired position relative to the roller 14, for example the width of a letter. After this adjustment movement has elapsed, which can be carried out simultaneously or in any chronological order, the stepper motor 15 causes the type setting stepper motor to pivot via the stop shaft 19 8 around the transverse axis 12 and the type carrier 1 counteracts the set type the roller 14. Between the type and the roller, depending on the mode of operation of the Device or a color carrier can be arranged in a known manner.

For the exact implementation of the printing process, the one shown in FIG. 1 The printing device shown also has additional auxiliary devices. An indicator 33 is arranged so that it indicates the left end position of the carriage 13. That Carrier wheel 6 has cams 34 which cooperate with an indicator 35, the the type setting is monitored. Furthermore, the carrier wheel 6 has tooth-like on its circumference Notches 36, in which a wedge 37 for braking the pivoting movement intervenes.

Fig. 3 shows the construction diagram of another embodiment of a printing device intended in particular for printing receipts. A type setting motor 8 carries a type carrier 1 at each end of its shaft 74.

The type setting stepper motor is also in the rest position in this version arranged approximately horizontal shaft.

Each type carrier has only one type series 2 - so that none Lifting rod is necessary. The type carriers 1 4 are each firmly connected to the shaft 7. This eliminates the need for a carrier wheel.

The type setting stepper motor 1 can be pivoted about a transverse axis 12 4, which is mounted on a suspension 38 fixedly connected to the carriage 13 4. The swivel movement of the type setting stepper motor, in which both type carriers can be brought to the stop is driven by a stepping motor 15 4. It acts on the type stepper motor via a toothed wheel 165 and a toothed belt 17 a gear 18 on a stop shaft 19. This is in a bearing 20 'on the slide 13 stored and acts through its asymmetrical profile on a lever 21, whose one end attached to type setting stepper motor 84 is.

The slide 13 is displaceable on guides 22 by means of bearing positions 23 stored in the direction of the transverse axis 12 * that is approximately perpendicular to the longitudinal direction of the shaft 7 and the conveying direction of the paper strip 39. The drive for the displacement of the carriage 13 'is carried out by a stepping motor 24 via a gear 25' and a toothed belt 27 5 which is fastened to the carriage 13 and which is deflected on a toothed wheel 26 will.

The paper strip 39 is indicated as a whole by 30 'by means of a Moved paper conveyor, the drive of which is carried out by a stepping motor 40. It drives a conveyor roller 44 via a belt drive 41 with gear wheels 42 and 43, respectively. It has a row of attack knobs on both end edges of its coat 32 occupied? which engage in the perforation holes 45 of the paper strip 39 and cause its advance. The paper strip 39 moves in the stop area the two type carrier 1 each via a pad 46 as an abutment for the Stop is used.

Simultaneously with the paper feed there is a rigid with the gear 43 coupled gear 47, a belt 48 and a profile wheel 49 an esser stop 50 rotated.

It belongs to a transverse perforation designated as a whole with 51- - and separator. This also has a saw blade 52, which by means of a Electromagnet 53 is adjustable in height. The saw knife 52 and the knife stop 50 extend transversely to the conveying direction of the paper strip 39, the saw knife 52 below, the esser stop 50 is arranged above the paper strip. The knife stop 50 has two longitudinal grooves arranged approximately opposite one another 54 and 55 of different depths into which the saw knife can be moved. For the transverse perforation of the paper strip 39, the longitudinal groove 54 with the smaller one is used Depth turned down. This position is shown in FIG. 3. If the saw knife 52 is moved upward into this groove by the electromagnet 53, cause the Tips of the teeth a perforation of the paper strip. The deeper longitudinal groove 55 cooperates with the saw blade 52 as a separating device.

When the longitudinal groove 55 is rotated downward, the electromagnet 53 move the saw blade 52 further upwards so that the paper strip 39 is completely is severed.

The printing device shown in FIG. 3 also has one Cliché roller 56, which synchronously via a belt drive 57 from the stepping motor 40 is driven with the paper feed. It is in front of the in the paper feed direction Type carrier 1 arranged and brings a constant on the paper strip Form.

4 and 5 show in a side view, and in one in the Sectional view seen in the same direction of view, one serving as a typewriter Embodiment of a device according to the invention. It is the same in the structure largely the embodiment shown in FIG.

Parts of the same function and corresponding training are therefore included are given the same reference numerals. From the Fig.

4 and 5 the arrangement of the individual parts of a housing 58 can be seen. A ribbon 59, which is omitted in FIG. 1 for the sake of clarity, is more common Way by means of drive and deflection rollers 60 and 61 between the paper carrier 14 and the type carrier 1 carried out. It is designated as a whole with 62 by means of a Drive moves.

In Fig. 4 is also by means of dash-dotted lines and parts A the paper conveying direction indicated, with the paper over to a support structure 63 mounted deflection rollers 64 and 65 are moved by means of the paper conveyor 30 will.

The embodiment of the printing device according to FIGS. 4 and 5 differs also differs from the structure of FIG. 1 in that the height adjustment of the Type carrier 1 by means of the hub rod 3 not by a stepper motor (Fig. 1 with 9), but by means of an electromagnet acting directly on the lifting rod 3 66 takes place.

The invention is not restricted to the exemplary embodiments. she can print devices for a wide variety of purposes and thus with include a variety of movable devices. Furthermore, for each movement process instead of the stepper motors, optionally other stepper drive devices, in particular Electromagnets are used. It is particularly useful for program-controlled printing devices also possible in the exemplary embodiments via mechanical drives coupled movement processes, for example paper carrier and paper conveyor, each to be provided with its own stepper drive device.

All from the description and the drawings Features can also be essential to the invention in other combinations.

Claims (24)

Claims 1. Printing device, in particular typewriter or receipt printer, namely with electronic control, with at least one type carrier, one Paper carriers and a paper conveyor as well as with moving devices for direct or indirect shifting and / or rotating and / or pivoting of these parts, indicated by the fact that each movement device for each linear or rotary or. Pivoting movement has its own electric stepper drive device assigned. 2. Printing device according to claim 1, characterized in that g e k e n n -z e i c That is, at least pay for all moving devices with a variable step the stepper drive devices consist of stepper motors. 3. Printing device according to claim 1 and 2, characterized in that g e -k e n n z E i c h n e t that for the movement devices, each only one movement step effect constant size, the stepper drive devices as Electromagnets are formed. 4. Printing device according to at least one of claims 1 to 3, characterized it is not indicated that a known cylindrical type carrier (1) arranged on the shaft (7) of a type setting stepper motor (8) and the type setting stepper motor (8) is mounted pivotably about a transverse axis (12) for the pressure movement. 5. Printing device according to claim 4, characterized in that g e k e n n -z e i c h n e t that on the shaft (7) of the type setting stepper motor (8 ') on both sides of the A type carrier (1 ') is arranged in each case at the transverse axis (12). 6. Printing device according to claim 4 or 5, characterized in that g e -k e n n z e i c h n e t that the type setting stepper motor (8) has its S (hwenkbewegung is assigned to the transverse axis (12) causing electromagnet. 7. Printing device at least according to claim 4, characterized g e k e n n z e i c h n e t that the type carrier (1) is axial to the type setting stepper motor (8) is adjustable. 8. Printing device according to claim 7, characterized in that g e k e n n -z e i c h n e t that the type carrier (1) rotatably attached to a lifting rod (3) and this is displaceable in the hollow shaft (7) of the type setting stepper motor (8). 9. Printing device according to claim 8, characterized in that g e k e n n -z e i c h n e t that the lifting device (3) is displaceable by means of an electromagnet (66) is. lo. Printing device according to at least one of Claims 4 to 9, as a result, that on the shaft (7) of the type carrier stepper motor (8) a carrier wheel (6) and the type carrier (1) with this carrier wheel (6) is releasably connectable. 11. Printing device according to claim 10, characterized in that g e k e n n -z e i c h n e t that the carrier wheel (6) and the type carrier (1) each cooperate Plug-in elements (5 resp. 4). 12. Printing device according to claim 10 and 11, characterized in that g e -k e n n z e i c h n e t that the carrier wheel (6) has notches (36) on the circumference. 13. Printing device according to at least one of claims 10 to 121 characterized in that the carrier wheel (6) with one or more Indicators (35) having cooperating projections (34). 14. Printing device according to at least one of claims 4 to 13, in that the type setting stepper motor (8) by means of its transverse axis (12) is mounted on a displaceable slide (13). 15. Printing device according to claim 14, characterized in that g e k e n n -z e i c h n e t that the carriage (13) is arranged displaceably in the direction of the transverse axis (12) is. 16. Printing device according to claim 14 and 15, characterized in that g e -k e n n z e i c h ne t that the carriage (13) has its displacement by means of transmission elements (25 to 27) effecting stepping motor (24) is assigned. 17. Printing device according to at least one of claims 1 to 16, in that the paper carrier (14) by means of corresponding Stepper motors are arranged to be rotatable and / or displaceable relative to the type carrier (1) is. 18. Printing device according to at least one of claims 1 to 17, in that the paper conveying device (3) has a having a toothed belt drive (31) moved by means of a stepping motor (28 or 40). 19. Printing device according to claim 18, characterized in that g e k e n n -z e i c h n e t that the toothed belt (31) on its outside attack cams (32) in Has distances that correspond to a longitudinal perforation of the paper strip to be conveyed (39). 20. Printing device according to at least one of claims 1 to 19, in that the paper is drawn in the longitudinal direction of the shaft (7) of the type setting stepper motor (8 *) is guided along it. 21. Printing device according to at least one of claims 1 to 20, in that the paper conveying device (30t) has an in Direction of conveyance after the type carrier (1 ') arranged transverse perforation device (51) and / or a separating device is assigned. 22. Printing device according to claim 21, characterized in that g e -k e n n z e i c h n e t that the transverse perforation device (51) is transverse to the paper conveying direction arranged saw knife (52) adjustable in height by means of an electromagnet (53) having. 23. Printing device according to claim 22, characterized in that it is -k e n n z e i c h ne t that the saw knife (52) by means of the electromagnet (53) optionally in a position causing the complete severing of the paper (39) can be brought is. 24. Printing device according to at least one of claims 1 to 23, in that it is a programmable, fully automatic Has electronic control device for all stepper motors and magnets.