EP1419487B1 - Gear arrangement for alternatively actuating two reading/writing units for chip cards arranged essentially on a plane in a tachograph for the purpose of respectively transporting a chip card to a withdrawal position - Google Patents

Abstract

The present invention relates to a gear arrangement actuated by a control motor. The motor can be reversed in its rotational direction in order to emit a chip card of a tachograph for example. The gear arrangement is provided with a slide-rod for each reading/writing unit, the slide-rod being embodied in the form of a toothed rack being able to be displaced in the direction of movement of the chip card. A control slider which is actuated by the control motor is coupled gearwise to the slide rods so that when the control slider is displaced, the slide rods carry out a movement in opposite directions.

Description

The invention relates to a gear arrangement for alternately operating two arranged in a tachograph substantially in a plane reading / writing units for smart cards in the sense of transport each chip card in the removal position with a reversible in its direction servomotor and a getrieblich operatively connected to the servomotor standing spool, each read / write unit is associated with a displaceable in the direction of movement of the smart card push rod.

Tachographs of the generic type are generally designed as built-in appliances with a flat, cuboid installation housing. The read / write units and the drive means, which cause that in the read / write position and locked in this state smart cards are moved to the removal positions, therefore, there is a very small space available. On the other hand, during use, deformed, ie curved or corrugated chip cards, require considerable force to be able to be brought into the removal position. Cost barriers and the fact that there is considerable space shortage on the board, which is based on the tachograph housing, however, forces not every actuator to be assigned a servomotor, but rather a single one for the two read / write units Servomotor must be provided, which, controlled in a suitable manner and with the interposition of a power flow deflecting gear arrangement, alternately causes the transport of one or the other chip card in the removal position.

Of course, the said restrictive conditions also influence the choice of the servomotor in terms of its performance, wherein the torque demand on the servomotor can be reduced by providing a high gear reduction between the servomotor and the actuators associated with the read / write aggregates. This leads to an optionally unacceptably long waiting time for the output of a chip card and requires an increased transmission costs with correspondingly large space requirements.

One in this regard from the DE-U-200 15 100.2 Known transmission arrangement provides between a driven by a servomotor control spool and mounted in the respective read / write units, the smart card associated carriage wedge gear means to redirect the movement of the spool in the direction of outputting the smart cards. Such a drive connection makes due to high friction losses, by lateral forces and the systemic power division increased power of the servo motor required and due to the necessary guidance accuracy of the components on which the wedge-gear elements are formed, a very high production cost.

The object of the present invention was therefore to provide a generic transmission arrangement with as few as possible producible and assemble components an optimal use of the available power of the servomotor with high reliability offers.

The solution to this problem provides that the spool is so gearingly engaged with each push rod, that perform during a movement of the spool, the push rods opposite movements.

A preferred embodiment is characterized in that preferably two identically designed carriers are provided, that on the carriers guides for the push rods and the spool are formed, that the spool is designed as a rack with opposing teeth and that in the carriers each with the respective Thrust rod and with a toothing of the spool engaging gear is mounted.

Further advantageous embodiments of the invention describe the non-cited subclaims.

The decisive advantage of the invention is to be seen in particular in that it can be realized with technically simple, robust and easily assembled means and due to the positive connection of the transmission components and the fact that the thrust acts exclusively in the direction of movement of the smart cards, a good efficiency and high Functional reliability offers. Furthermore, the solution found is largely insensitive to tolerances and allows a smoother running of the servomotor and thus a better use of the available engine power or the use a power demand adapted actuator relatively low power.

It should also be emphasized that two completely identical, consisting of the carriers and the respective associated covers bearing housing are provided, the serving as a spool rack but arranged and guided in such different ways in the bearing housings and is in engagement with the gear pairs that in each direction of movement of the Control slide an opposite movement of the provided for outputting the smart card push rods takes place and thus each push rod with respect to the transport of a smart card remains ineffective. In this case, the invention is applicable regardless of whether in the read / write units using a Kippsprungwerkes an automatic transport of the input smart card takes place in the read / write position or whether the smart card by hand, optionally using a carriage or a drawer into which the Chip cards are inserted, inserted into the read / write position and locked in this position in a suitable manner.

With the gear assembly found it is also meaningless whether the read / write units are arranged close to each other or relatively far apart. In addition, it should also be noted that at least the carrier can be formed as a component on which optionally also the bearing points of the reduction gear are formed and thus passes through the arranged on the opposite side of the circuit board actuator only with the mounted on the motor shaft pinion in the gear assembly.

• Figur 1 eine Draufsicht auf die erfindungsgemäße, teilweise schematisch dargestellte Getriebeanordnung, wobei die den Trägern zugeordneten Abdeckungen abgenommen sind,
• Figur 2 eine dem Überblick dienende Frontansicht eines Fahrtschreibers mit in einer Ebene angeordneten Lese-/Schreibaggregaten für Chipkarten,
• Figur 3 einen Teilschnitt der Getriebeanordnung gemäß der Schnittlinie A in Figur 1 zur Darstellung der Zuordnung von Stellmotor und Getriebeanordnung zur Leiterplatte eines Fahrtschreibers gemäß Figur 2 und des zur Verfügung stehenden Bauraumes.

In the following the invention will be explained in more detail with reference to drawings. Show it:

• FIG. 1 shows a plan view of the gear arrangement according to the invention, shown partially in schematic form, with the covers assigned to the carriers being removed,
• FIG. 2 shows an overview of a front view of a tachograph with read / write units for chip cards arranged in a plane;
• 3 shows a partial section of the gear arrangement according to the section line A in Figure 1 to illustrate the assignment of servomotor and gear assembly to the circuit board of a tachograph according to Figure 2 and the available space.

As can be seen from FIG. 1, the gear arrangement consists of two identically designed carriers 1 and 2, in which guide grooves 5 and 6 provided for push rods 3 and 4 are formed. With 7 and 8 are a spool 9 associated, serving as lateral guide elements supporting pillar. The interchangeability of the carrier 1 and 2 requires that in each case a further buttress 10 and 11 is formed. With 12 and 13 are designated axes which are formed directly on the carriers 1 and 2. On the axes 12, 13 a pair of gears 14 and 15 is mounted in each case. The gear pair 14, 15 engage with sprockets 16 and 17 in each case one of the push rods 3, 4 formed teeth 18 and 19, the sprockets 20 and 21 of the tooth pairs 14, 15 mesh with the spool 9 alternately formed, preferably in a plane lying teeth 22 and 23 at this point it should be noted that the Gear pairs 14, 15 may each be formed as an equally toothed gear and thus no translation between the spool 9 and the push rods 3, 4 must be made when the given installation width of the relevant tachograph the spool 9 sufficient hub for the transport of a smart card from the Read / write position is available, ie the read / write units, in contrast to the selected embodiment are closer to each other.

Breakthroughs 24, 25, 26, 27, 28 and 29 and slots 30, 31, 32 and 33 are used to attach also identically designed covers 34 (Figure 3) on the carriers 1 and 2. The covers 34 are not only as a handle protection, in each case by completing a bearing housing, but as a guide part with respect to the push rods 3 and 4 and the control slide 9 and as an axial securing with respect to the gear pairs 14, 15th

The figure 1 can be further seen that on the spool 9 at right angles to the plane of the teeth 22, 23 a flag 35 is formed, in cooperation with two forked light barriers, not shown, the control of a reduction gear 36 and the pinion 37 with the spool. 9 operatively connected servomotor 38 is used. Depending on the controlled direction of rotation of the servomotor 38, starting from the neutral rest position of the gear arrangement according to FIG. 1, either the push rod 3 or the push rod 4 is actuated in the direction of outputting a chip card and returned to the rest position in order to ensure a reentering of a chip card. At the same time, due to the positive connection in the form of a gear, the respective other push rod 3 or 4 performs an opposite movement, ie a movement that takes place without influencing the chip card assigned to this push rod.

With 39, 40, 41 and 42 are provided for the attachment of the carrier 1, 2 on the circuit board 43 (Figure 3) provided spacer bolts. Lugs 48, 49, 50 and 51 provided with through holes 44, 45, 46 and 47 on the supports 1, 2 are used for aligning the supports 1, 2 and the read / write units, wherein in each case on a bearing part 52 and 53 of the read - / writing units trained, unspecified pin in the through holes 44, 45, 46, 47 engage. On in the bearing parts 52, 53 guided, the smart card associated carriage 54 and 55 tongues 56 and 57 are formed, via which the push rods 3, 4 to the carriage 54, 55 attack, i. the assignment of the read / write units and the gear assembly is tuned such that after assembly of the modules, the end faces of the tongues 56, 57 directly opposite the end faces of the push rods 3, 4.

With the figure 2, a tachograph 58 is shown, in which the transmission arrangement described above is applicable. It has a front panel 59 connected to a cuboid housing, behind which a display 60 is arranged and from which keys 61 and 62 protrude. 63 denotes a window cutout assigned to the display 60, a cover 64 to which a seal 65 is assigned closes a stray detection device provided for diagnosis and parameterization purposes. Designated at 66 and 67 are slots which provide access to the readers / writers provided for the personal smart cards associated with the drivers. The slots 66, 67 are for facilitated insertion of smart cards with funnel-shaped Countersinks 68 and 69 and provided with centrally shaped finger hollows 70 and 71 such that the smart cards are inserted into the respective read / write position. A designated 72 slot is provided for the passage of the print carrier of a tachograph 58 arranged in the receipt printer. Further keys 73, 74 and 75 of the tachograph 58 which are guided in the front panel 59 or through the front panel serve in combination with the keys 61 and 62 to select the most important working time data of the driver, the forward and backward scrolling in the data records of a selected data type, the triggering of the pressure and the release of the chip cards.

The partial section Figure 3, shows the relatively low, on the order of 10 mm amount space between the circuit board 43 and the bottom plate 76 of the tachograph, within which the gear assembly according to the invention is realized. With 77 and 78, the spacer bolts 40, 42 associated screws are designated. A pair of screws 79/80 is used to attach one of the read / write units, wherein integrally formed on the bearing part 53 supports 81/82 with extensions 83/84 in the through holes 45/47 aligning. A designated recess 85 in the cover 34 is provided for the flag 35. From Figure 3 is also apparent that due to the full use of the available height, the gear assembly for stiffening the tachograph housing, especially with regard to its handling before and during installation in a motor vehicle contributes.

Claims (7)

1. Gear arrangement for alternately actuating two reading/writing units for chip cards, these units being arranged essentially in one plane in a tachograph (58), for the purpose of transporting a respective chip card into the withdrawal position, having a servomotor (38), of which the direction of rotation can be reversed, and a control slide (9), which is in operative connection, in terms of gearing, with the servomotor (38), each reading/writing unit being assigned a push-rod (3, 4) which can be displaced in the direction of the movement of the chip cards, characterized in that the control slide (9) engages, in terms of gearing, with each push rod (3, 4) such that, when the control slide (9) moves, the push rods (3, 4) execute movements in opposite directions.
2. Gear arrangement according to claim 1, characterized in that preferably two identically configured carriers (1, 2) are provided, and in that guide grooves (5, 6) for the push rods (3, 4) and the control slide (9) are formed on the carriers (1, 2).
3. Gear arrangement according to claim 2, characterized in that the control slide (9) is designed as a rack with opposite toothing formations (22, 23), and in that mounted in the carriers (1, 2) is in each case one gearwheel which engages with the respective push rod (3, 4) and with a toothing formation of the control slide (9).
4. Gear arrangement according to claim 3, characterized in that the gearwheels are designed as pairs of gearwheels (14, 15) provided with different numbers of teeth and in each case one toothed ring (20, 21) of the pairs of gear wheels (14, 15) engages with the control slide (9) and the other toothed ring (16, 17) engages with the respective push rod (3, 4).
5. Gear arrangement according to claim 2, characterized in that it is possible to connect to each carrier (1, 2) a covering (34) which completes the carriers (1, 2) to form bearing housings, and in that means (44, 48/46, 50 and 45, 49/47, 51) for aligning bearing housings and reading/writing units in relation to one another are integrally formed on the carriers.
6. Gear arrangement according to claim 2, characterized in that at least the carriers (1, 2) are designed as a single component which can be fastened in the tachograph.
7. Gear arrangement according to claim 6, characterized in that the bearing means of the reduction gear (36, 37), which is provided between the servomotor (38) and the control slide (9), are formed in the component comprising the carriers (1, 2).

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