DE1042281B - Control and drive device for the printing and deletion mechanism of a receipt or control strip printer - Google Patents

Description

Control and drive device for the printing and erasing mechanism a receipt or control strip printer. The invention relates to a Receipt or control strip printer, in particular on the control and drive device for the printing and deleting mechanism of a telephone charge printer, which is on the subscriber side can be looped into the self-dialing network and is used next at least the indication of the date and time of a conversation the number of the called subscriber and the call charges - either in accounting units or as a total fee - to be recorded.

The use of such charge printers for participants who are guest speakers need a billing basis, for example hotels or the like, has long been known and several types of printers have been used to do this developed, in which either the information to be registered, such as phone number, date, Time of the start and end of the call and, if applicable, the call charge, one after the other or at the same time on a control strip or a receipt get to the imprint. The printer according to the invention falls under the latter Group in which all information is printed at the same time, and in a known manner Way with a printing unit in one operation both on a receipt as also on a control strip, with the receipt either from a strip cut off or formed by an invoice form to be inserted can.

In the case of such subscriber-side fee printers, which are not or are seldom operated and serviced by specialists, there is often a risk incorrect operation, be it unintentional or intentional, for example by Interruption of the power supply. The present invention is therefore the object based on a control and drive device for such a fee printer to provide which, on the one hand, works quickly and safely and, on the other hand, in the event of unintentional or more intentional, e.g. B. fraudulent incorrect operation identifies the malfunction power.

According to the invention it is proposed to use the printer as a function to provide printing unit control means that can be triggered by the fee registration device, due to the printing unit switch-on linkage when at least one charge pulse is received can be brought into a preparatory position and that is effective when the call is terminated extinguishing control means are provided through which the prepared printing unit switch-on linkage can be released and the extinguishing device can be triggered, which automatically depends on whether a print has been prepared or not, after the printing process or immediately resets the register counters to their original position.

Further features of the invention emerge from the following description of an embodiment shown in the drawings. It shows Fig. 1 the right side wall of the charge printer with the electromagnetically triggered mechanical part of the control and drive device according to the invention, FIG. 2 a view of the switch-on control linkage according to a section II-II in Fig. 1, Fig. 3 a part of the control and drive device on an enlarged scale, 4 shows the switching arrangement controlling the triggering of the drive device in one simplified block diagram.

The invention is illustrated on a telephone billing printer, in which the information to be recorded is simultaneously on a receipt and a control strip can be printed. Both the printing and the deleting process will be carried out by an electric motor in the example shown.

According to Fig. 1, which shows only the parts directly related to the invention, a rail 2 is attached to the right side wall 1, which carries three switching magnets DM, LM and DDM. The switching magnet DM is used to prepare for printing, the magnet LM to trigger the printing and erasing process and the magnet DDM to prepare a control or double pressure. Each of these switching magnets has an armature 3 or 4 or 5, which is pivoted counterclockwise by spring force. At the end, the anchors 3 to 5 have claws 6, 7 and 8 which can be adjusted via elongated holes and which are angled approximately vertically downwards. The claw 6 engages over a tab 9 on a switch rail 10, the claw 7 a tab 11 on a switch rail 12 and also a tab 13 on the switch rail 10, but the tab 13 does not rest on the claw 7 because it is somewhat narrower when the tab 11 and the rail 10 are held on the claw 6 via the tab 9. Finally, a rail 14 is also provided, the tab 15 of which is held by the claw 8 of the armature 5. A spring 16, 17, 18 (FIG. 2) engages on each rail 10, 12 and 14 and strives to pull its rail to the left into the effective position. On the other hand, the springs are anchored to a pin 19 of the side wall 1. Another pin 20 in the side wall 1 is used to jointly support the rails 10, 12 and 14, which are guided in elongated holes on the pin 20. As can be seen from FIG. 1, the rails 10 and 12 are of the same design and are mounted tilted only by 180 °. The tab 22 is made somewhat narrower, for example ground off. The tab 21 on the rail 12 has no function. The tabs 22 and 23 on the rails 10 and 12 close a contact 24 for the circuit of an electric motor, not shown, when they are moved to the left. While, as already mentioned, the rails 10, 12, 14 are on the one hand slidably guided on the pin 20, they are hinged with their left end to levers, namely the rail 10 on a switching lever 25, the rail 12 on one of the switching lever 25 the same lever 26 and the rail 14 on a release lever 27. The lever 27 is in turn mounted on the shaft 28 of the armature 3 and has a cleat 29 with which it engages under the armature 3 and lifts it when the rail 14 is released from its spring 18 is pulled to the left. The levers 25 and 26 are pivotably mounted on the side wall 1 and are used to switch on and off clutches 30 and 31, which are designed as single-turn ratchet clutches. These clutches 30, 31 are driven counterclockwise by an electric motor via a common gear reduction (not shown here) when the above-mentioned contact 24 is closed. The clutch 3.0 is used for the pressure Zverlcsantrieb, the clutch 31 to clear the counter.

The formation of the two drive couplings 30 and 31 for the pressure and extinguishing device as well as its switching lever 25 and 26 can be seen in FIG. 3, in which, however, only the clutch 30 and the shift lever 25 are shown in full, since the clutch 31 and the shift lever 26 are the same as those shown. Of the The clutch 30 is driven by a gear 32 which is loosely rotatable on the Coupling drive shaft 33rd mounted on the side wall 1 and with a toothed wheel 34 is firmly connected. With this toothed wheel 34 is a pawl 35 of a pawl lover 36 by the force of a between the lever 36 and a shoulder on the locking lever 39 tensioned spring 37 can be brought into engagement when the hook 38 on the locking lever 39 is released will. The ratchet lever 36 and the locking lever 39 are pivotable on a disc 40 attached, which is rotatable on the output shaft 33, upstream of the toothed wheel 3.4 is arranged. In addition, the disk 40 also has an opening 41 into which a pin 42 attached to the locking lever 39 protrudes and that together with the opening 41 limits the pivoting path of the locking lever 39. The connection between this the Coupling parts 35 to 39 supporting disk 40 and the output shaft 33 is over an adjustable and tightenable clamping lever 43 pushed onto the latter is produced, at the end of the disc 40 a stud 44 is attached, which in a Slot 45 of the disk 40 engages. On the run-up side 46 - the couplings 30, 31 rotate counterclockwise - cleat 44 is preferred slightly beveled.

The shift lever 25 has, as FIG. 5 illustrates, not only the task of its engaging in the rest position in the locking hook 38 nose 47 the Coupling 30 in accordance with the commands given to it via shift rail 10 switch it on, but switch it off again after one turn and the switch linkage 10 to return to the starting position. To do this, it protrudes with a margin 48 in the circumferential area of the cleat 44, through the run-up edge 46 of the when switching on the clutch counterclockwise pivoted shift lever 25 during the The clutch rotation is pushed away shortly before the end of the full rotation and clockwise is pivoted back. Furthermore, the projection is shaped so that, after the Stollen 44 has passed, falls behind it and thereby counteracts the clutch Turning back secures. Since the nose 47 and the projection 48 in different planes have to attack, the shift lever 25 is bent below its pivot point.

However, there are also devices on the shift levers 25 and 26 available in order to be able to lock each other so that only one of the Clutches 30, 31 is switched on, namely the lever 26 has this one of the Nose 47 'adjacent upwardly angled tab 49' and the shift lever 25 one of the Point of the shift rail 10 adjacent locking hook 50 on. By arrows The movement paths of the tab 49 ′ and of the hook 50 are illustrated in FIG. 3 by x and y. If the hook 50 pivots in the direction x, it lies under the tab 49 ', the lever 26 cannot pivot in direction y. On the other hand, if the tab 49 'pivots in the direction y, so he sits under the hook 50, and the lever 25 cannot move in the direction x pan.

4 shows a simplified basic circuit diagram of the control device, insofar as it is related to the subject matter of the invention, in the de-energized state. The hook switch GU, the dial contact Wsk and a relay A are located in the speech circuit. It has a delayed relay B, a relay S, which is used to monitor the voltage and is kept under current via a resistor R when the power supply is connected, and a relay C which also operates delayed. The switching magnets DM, LM and D'DM shown correspond to the release magnets shown in FIG. 1. The switching magnet GM is used to register the charge pulses sent by the office in a counter of the printer. An electromechanical counter can also be connected in parallel to this in a known manner, which is used for monitoring the printing counter and for billing after a longer period of time. The a-contact in the device circuit is controlled by relay A in the speech circuit. The B relay has the contacts bi and b2. The S relay acts on the contacts sl to s3 and the C relay on the c-Iiontakt. A contact i is also provided, which is briefly attracted by an I relay (not shown) when a charge pulse arrives. The contact u is used in a known manner for the temporary separation of circuits, for example while the engine is running, and can be operated mechanically together with the contact 24 shown in FIG.

As has already been mentioned, in the idle state there is always voltage on the relay S via the s, -contact and the resistor R, which is turned to the right, so that it is constantly attracted. Contacts s2 and s3 are open, all other relays A, B and C are de-energized, as are the switching magnets GM. DII, LM and DDM. If the handset is picked up at the beginning of a conversation, the contact GU closes the speech circuit, the A relay is energized and switches contact a to the left. The B relay is thus also energized and its contacts b1 and b2 are closed. Closing b1 has no effect, since s3, located in the course of the line, is open. Likewise, turning the contact b2 to the right has no effect for the time being, since the contact a is pivoted to the left. Since the B-relay drops out with a delay, its contacts b1 and b2 also remain in the assumed position during the subsequent dialing process. When dialing, the dialing pulses are detected and stored in a dialing number counter in a manner not shown here. If the receiver is hung up without a charge pulse causing the i-contact to respond, the following process takes place: The GU contact is interrupted, the A relay drops out. Voltage is applied to contact b2 via contact a, which returns to the rest position shown. However, since the B relay drops out with a delay, the C relay receives voltage and closes the C contact. The B relay now drops out and moves contact b2 to the left. However, since it also drops out with a delay, the C relay is still picked up, so that its contact c is still closed. This gives the switching magnet LAl, which is the extinguishing trigger magnet, voltage and picks up until the circuit is interrupted when the C relay drops out by the C contact; that is, the switching magnet LM receives a brief response pulse.

As can be seen from Fig. 1, the armature 4 is attracted by the LM release magnet. His claw 7 releases the tab 11 on the rail 12, and under the action of the spring 17, the rail 12 snaps to the left. Here, the shift lever 26 is pivoted counterclockwise, and its nose 47 'releases the hook 38' of the coupling 31. At the same time, the tab 23 on the rail 12 has closed the contact 24, the electric motor drives the drive wheels of the clutches 30, 31 in the direction of the arrow via a reduction gear. If the clutch 3: 1 has now carried out almost a full rotation, the stud 44 ′ pushes the shift lever 26 away again, as has already been explained in detail in the preceding description for the clutch 30, ie it swivels it clockwise, with below When the spring 17 is tensioned, the rail 12 is pushed back into its starting position with a little overstroke, in which the claw 7 can collapse again in front of the tab 11, since the release magnet LlVI is now de-energized again and its armature 4 thus dropped. When the entire revolution has been completed, the shift lever 26 is positioned behind the stud 44 'in such a way that the coupling 31 can no longer turn back. When the rail 12 is reset, the tab 23 has also released the contact 24 again, and the electric motor is de-energized.

If, after establishing the connection, as described above, a charge pulse arrives at the subscriber, an I relay is energized in a manner not shown here, which briefly closes contact i. Since the a-contact is turned to the left, the charge switching magnet GM and at the same time the switching magnet DM receive a short response pulse. The fee switching magnet GM, which works on printing type wheels, and a possibly present fee pulse counter, not shown here, are rotated one unit further. As can be seen from FIG. 1, the armature 3 is raised by the pulse on the magnet DM. The claw 6 releases the tabs 9 on the rail 10, and under the action of the spring 16 the rail 10 can move to the left, but only by a short distance, which is just enough for the hook 50 shown in FIG. 3 to move can slide something under the tab 49 ', but the nose 47 does not yet release the locking hook 3.8. This limitation of the path of the rail 10 is achieved by the tab 13, which is somewhat narrower than the tab 11 and can therefore cover a certain distance before it rests on the claw 7 of the extinguishing trigger magnet LM. Since the tab 22 is also narrower than the tab 23, the contact 24 is not yet closed for the time being. The described switching measures prepare the pressure. However, the print command is stored until the call is ended, during which time several charge pulses still arrive and can be recorded by the charge recording devices. The rail 10 is fully switched on only after the conversation has ended, when the armature 4 is attracted by the above-described excitation of the extinguishing trigger magnet LM, the tabs 11 and 13 being released by the claw 7 at the same time. Since the hook 50 of the switching lever 25 has already slid under the tab 49 'of the lever 26 with the preparation for printing, the rail 10 can indeed snap to the left under the tension of the spring 16, but the rail 12 is initially held in an inoperative position , since the tab 49 'rests firmly on the hook 50. The claw 7 can, however, no longer hold the tab 11, since it is held in its raised position by the tab 13 on the one hand and the rail 12 has already been shifted a bit on the other hand.

As the rail 10 rushes forward, however, the tab 22 now moves the contact 24 is closed, whereby the motor drives the clutches 30, 31. the Nose 47 has left the hook 38, the locking lever 39 swings up and leaves the on the ratchet lever 36 arranged pawl 35 under the tension of the spring 37 in a Engage the gap in the toothed wheel 34. Via the slot 45 in the disc 40 and the cleat 44, the lever 43 clamped to the output shaft 33 is taken along. After a Rotation of the cleat 44 runs with its incline 46 on the projection 48 of the lever 25 and returns the lever 25 to its starting position. This is where the nose comes in 47 in the circulation area of the locking hook 38 and pulls over the locking lever 39 and the pawl lever 36 against the force of the spring 37, the pawl 35 from the toothed wheel 34 out, whereby the drive connection is interrupted again. The one behind the edge of the cleat 44 falling projection 48 secures the coupling 30th against turning back. With the pivoting back of the lever 25, however, the rail is also 10 pushed back against the force of the spring 16 and over the flap 9 by the Claw 6 latched.

As soon as the lever 25 has been pivoted back so far that the hook 50 has emerged under the tab 49 ', the splint 12 is free and through its Spring 17 pulled to the left, whereby the shift lever 26 the locking necks 38 'of the Clutch 31 releases. The threshold rotation now takes place in the previous work cycle already described way. After the clutch 31 via the shift lever 26 the Rail 12 has pushed back so far under tensioning the spring 17 that the Claw 7 can collapse in front of the tab 11, the electric motor is also de-energized again, the clutch drive wheels stand still.

The two working methods described correspond to normal operation. If no charge pulse is given while the connection is established, only deleted, d. H. the counter for the calling and / or called subscriber is reset. There is no printing. But if you get a charge impulse during the call to the subscriber, the DM solenoid is triggered and the one at the end of the call printing of all information important for call accounting prepared. Once the printout has been made, the deletion is activated, which is now in addition to the previously described Also delete the printer counter for the charge impulses or a possibly resets the intended charge result counter to zero.

But now there is the possibility that the power supply fails during the call or when the charge printer is idle. With the devices described so far, it would be possible, for example, with fraudulent intent to interrupt the power supply immediately after a connection has been established in order to suppress the recording of charge pulses. The S relay is provided so that you can immediately visually check such malfunctions. If there is a power interruption during a call, for example after the first charge pulse, which has already prepared the pressure via the switching magnet DiV, all relays drop out. The S relay closes its contacts s1, s2 and s3. If the current is switched on again after some time, the magnet DDM responds immediately, since s2 is closed. The contacts, and s-, are follow-up contacts, ie s3 only opens when s1 has closed the circuit via resistor R. However, since current had already reached the B relay via contact u and contact a, which was placed to the left, bi is closed, as does b2. When you hang up the receiver, the C relay responds again; the extinguishing trigger magnet LM attracts its armature 4. Since the print preparation magnet DM has already responded before, the printing process is first switched on in the manner already described; the printer registers the values stored in the counters both on the receipt and on the control strip. The control strip is advanced one column, the receipt remains. Then, as described above, the counters are cleared. Now, however, when the magnet DDAT is triggered, the claw 8 has released the tab 15 of the rail 14. Under the tension of the spring 18, the lever 27 could lie against the pin 51 of the rail 12 on which the spring 17 is suspended. The cleat 29 was pivoted against the anchor 3 from below. As the extinguishing switch rail 12 rushed forward, the pin 51 also released the lever 27 and thus the rail 14 so that it could slide freely to the left, whereby the stud 29 now lifted the armature 3 so far that the claw 6 released the tab 9 and immediately following the pivoting back of the printing unit switch lever 25, a new printing unit was triggered. However, since the extinguishing switch rail 12 already jumped into the switched-on position when the rail 10 was reset, the tab 49 'of the switch lever 26, following the direction of arrow y in FIG. 3, lay under the hook 50 of the switch lever 25 stored for a long time until after one full revolution of the extinguishing clutch 31, the shift lever 26 is pivoted back in a clockwise direction. If this has taken place, the switching lever 25 , which has meanwhile been released, has already switched on the printing unit drive again. Since the number and charge counters were reset to their original position before this second print, the receipt is now overprinted with invalid characters, for example dashes or zeros, which the counters have in the starting position, so that the charge printer does not provide a valid receipt. On the control strip, however, this print appears in the next column; The power interruption and its exact time of occurrence are immediately visible here, since the counters are not printed in the rest position during normal operation. The claw 7 is lifted so high by the pre-accelerated printing mechanism switch bar 10 over its tabs 13. that a further deletion is automatically triggered following the printing.

In a similar way, a warning is also printed if a power interruption occurs outside of a call, ie when the charge printer is in the idle state. The tripping proceeds as follows: When the current returns, the magnet DDM is excited via contact s2. This brings the rail 14 into preparation. The contact s1 gives voltage to the B relay, which closes its contacts bi and b2. The S relay is excited via the contact s3 and bi, which now opens the contacts s2 and sg, the latter only when s1 has closed the holding circuit via the resistor R. When the b2 contact is closed, the C relay is also energized, and this closes the c contact. If the B relay is de-energized when the contact s1 is switched over, its contact b2 turns to the left and the magnet LM receives voltage via the c contact until the C relay also de-energizes with a delay. When the current is switched on again, the magnet DDA7 is excited first and then the magnet LM. With the latter, however, the extinguishing rail 12 is released, which snaps to the left and the extinguishing clutch 31 switches on. Since the pin 51 releases the lever 27, the rail 14, following the pull of the spring 18, can jump to the left. The lever 27 with its cleat 29 lifts the armature 3 of the pressure release magnet DM mechanically, the rail 10 jumps slightly to the left, but its switching lever 25 is locked by the switching lever 26 , so it can only switch on its printing unit clutch 30 after the extinguishing rotation has been completed, which executes an invalid or zero print as in the previously described work cycle. Then, as already described there, there is another erase rotation. The receipt slip As the control strip shows, the invalid print, a sign that a malfunction -present and therefore possibly -the time switch of the printer, driven by the same network, has to be checked and readjusted. The last-mentioned method, namely a brief power interruption, also allows a functional check of the charge printer at any time, for example after a paper or ribbon change or after the date and time have been reset.

Claims (12)

PATENT CLAIMS: 1. Control and drive device for the printing and deletion mechanism of a receipt or control strip printer, in particular a fee printer that can be looped into a telephone network on the subscriber side, in which the printing and deletion of the counters set during the connection setup and the duration of the call is in a work sequence is carried out, characterized by printing unit control means (DM, 3) which can be triggered as a function of the charge registration device (a ), by means of which the printing unit switch-on linkage (10) can be brought into a preparatory position when at least one charge pulse arrives, and that when the call is terminated, the extinguishing control means (LM , 4) are provided, by means of which the prepared printing unit switch linkage (10) can be released and the extinguishing device can be triggered, which automatically, depending on whether a print has been prepared or not, following the printing process or immediately resets the register counters to their original position. 2. Control device according to claim 1, characterized in that in addition to the pressure-preparing and the pressure and deletion triggering control means (DM, LM) auxiliary control means (DDM) are provided through which when a fault occurs, in particular an intentional or unintentional Suppression of charge pulses by interrupting the device power supply, a switching device (14) can be triggered, which causes the invalid printing of the receipt. 3. Control device according to claim 2, characterized in that by triggering the protective switching device (14) automatically following the first extinguishing process the printer switching device is triggered, so that the receipt with Invalid characters provided when the counters are in the idle position is overprinted. 4. Control device according to claim 1, characterized in that two delayed falling relays (B, C) are provided for generating the extinguishing pulse, of which the second (C) is controlled by the first and whose contacts (b, c) so one behind the other. are switched so that when the first relay (B) drops out while the second relay (C) is still picked up, a short-term current impulse depending on the drop-out delay time of the second relay (C) is applied to the extinguishing trigger magnet (LM). 5. Control device according to claim 1 to 3, characterized by a continuously attracted relay (S) in the idle state, which when the failure. Device power supply closes a circuit for the auxiliary control means (DDM;, 3; 15), so that immediately when the current arrives at the tripping magnet (DDM) of the auxiliary control means, a short current impulse is given until the relay (S) responds. 6. Control device according to claim 5, characterized in that the relay (S) which triggers the auxiliary device is a Contact (s1) actuated, through which the working relay when the power returns (B, C) are brought into their working position. 7. Control device according to claim 2 and 3, characterized in that a lying in the speech circuit, the dial number transmission to the printer serving relay (A) interrupts the circuit for the extinguishing trigger magnet (LM) so that during a conversation when the power returns after an interruption the device power supply is not switched on, but only after the handset has been hung up, with the first deletion process automatically being followed by an "invalid print". B. Control device according to claim 7, characterized in that in the event of a power failure during a work break, d. i.e., if no call is in progress, and during a call if there is no one Charge pulse has reached the charge pressure meter, the first deletion process does not Pressure precedes, with the "empty pressure" outside of a conversation about the idle located contact (a) of the relay (A) in the speech circuit immediately at the Restoring the power supply, but not until after a call is in progress When the receiver is hung up, the relay (A) has its contact (a) in the rest position kills. 9. Control device according to claim 7 and 8, characterized in that in the event of a power interruption after the charge pulse has been received, this is indicated on the receipt registered information is invalidly overstamped by the blank print without shifting it while the control strip is transported that far after the first print that the blank appears in the next column. 10. Control and drive device according to claim 1, characterized in that the printing unit switch linkage (10) via a switch-on lever (25) to a one-turn ratchet clutch, Electrically driven clutch (30) acts, which is automatically after a full turn and the switch linkage (10) preferably with Overtravel resets to the switch-off position. 11. Drive device according to claim 10, characterized in that the drive of the extinguishing device via one of the printing unit coupling (30) the same one-turn clutch (31) takes place, which is effected by the extinguishing switch linkage (12) triggered via a switching lever (26) identical to the lever (25) for switching on the pressure and switched off after one revolution while resetting the extinguisher switch linkage will. 12. Drive device according to claim 10 and 11, characterized by the engagement levers (25, 26) for the clutches (30, 31) associated locking means (49 ', 50), which enable the simultaneous engagement of both clutches. (30, 31) prevent. 13. @ Control and drive device according to. Claims 2 and 3, characterized in that the switching linkage (14, 27) causing the double pressure in the event of malfunctions engages under the release armature (3) of the pressure release magnet (DM) in such a way that it is mechanically raised into the release position when the pre-released switch linkage (14, 27) is released when the extinguishing switch linkage (12, 51) becomes effective. Considered publications: German patent specifications 733 603, 740 029, 879258.