JP2000251103A - Tachograph provided with electronic clock and running mechanism for driving chart disk working as record carrier whiel relating to time - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep labor for automatic following of a chart disk storage body as small as possible, especially to construct a given running mechanism concept and to make structure height a short as possible in this case. SOLUTION: An adjustment motor 37 provided with a pinion 48 fixed to a motor shaft 38 acts upon the 1st gear 23 of running mechanism directly, a slit 35 is formed in the 2nd gear 25 of the running mechanism, and pulse generators 25/35/36 are formed in such a manner that the gear 25 acts upon and is connected to a light barrier 36. A 3rd gear 30 which engages with a chart disk storage body 14 as signal generators 30/33/34, is provided with a slit 33 and has the same tooth array and a light barrier 34 arranged while corresponding to the gear 30 are arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises an electronic timepiece, a traveling mechanism for driving a chart disk serving as a record carrier in relation to time, and a chart disk housing for centering and entraining the chart disk. When the discrepancy occurs between the time display and the time scale printed on the chart disc relative to the tachograph recording mechanism acting on the chart disc, the chart disc is stored. Means for following the body are provided, and an adjusting motor is further provided, and the adjusting motor is transmission-coupled to the traveling mechanism, and between the adjusting motor and the step motor driving the traveling mechanism, A freewheel device is arranged, a signal generator indicating the zero-time position of the chart disk container, and a time A pulse generator that supplies a pulse proportional to the peak is provided, and a comparison circuit is further provided.When the count value of the pulse supplied by the pulse generator corresponds to the current time, the comparison circuit The present invention relates to a type configured to cut off power supply to an adjustment motor.

[0002]

BACKGROUND OF THE INVENTION Tachograph recordings must be able to correspond to the current time, as is known. In tachographs (unlike the recording method, in which the time mark is recorded together on a "neutral" record carrier), in general, the chart disc is provided with a time scale. This means that the chart disk container arranged corresponding to the chart disk is driven in relation to time, and according to the measured value,
The result is that the tachograph's recording mechanism, which is moved radially with respect to the mounted chart disk, must correspond in time. By the entraining mandrel eccentrically formed in the chart disk container,
A non-rotatable connection between the chart disc housing and the mounted chart disc is guaranteed.

[0003] When the tachograph is first started, after a voltage interruption based on repair work, when switching between summer time and winter time, or when the inaccuracy of the operation of the traveling mechanism increases, the time conversion based on the calendar is controlled by the processor. The electronic timepiece as it is performed is buffered or buffered, and thus continues to function when the tachograph voltage supply is interrupted, so that, for example, the time shown on the tachograph display and the inserted tachograph is currently operating. A time lag occurs between the time scale value of the radial line of the chart disk and the time scale value.

Conventionally, a general tachograph having an electronic timepiece and a traveling mechanism for transporting a chart disk related to time has a manually operable means for compensating for a time lag. That is, there is a transmission connection between the transmission element of the traveling mechanism and the adjusting element that is accessible outside the traveling mechanism. In this case, the traveling mechanism includes
A clutch means or freewheel means must be provided. These measures make it possible to adjust the movement of the chart disc mounting part independently of the running mechanism motor and with a still acceptable adjusting force.

[0005] Apart from the fact that such interventions in the running mechanism also allow unauthorized manipulation, the manual follow-up of the chart disc mounting requires a considerable amount of time and subjective attention. There is a risk that the follow-up by a troublesome hand may not be performed intentionally or may be forgotten. Because the tachograph display always shows the correct time,
This is because the position of the chart disk mounting portion cannot be seen from the outside. A time display with hands having a drive branching off from the running mechanism of the chart disc housing provides a position indication that cannot be overlooked, and in the selected tachograph concept such a solution is no longer relevant. It is not something with. However, at the same time,
The lack of an extremely legible position display for the chart disk container is also the reason why the manual follow-up of the chart disk container and the proper time adjustment are inadequate. In this case, the work becomes even more difficult, with the addition of an unfavorable installation position of the tachograph and often insufficient lighting in the driver's cabin.

Accordingly, the time lag between the display of the electronic timepiece and the position of the chart disk container is automatically followed in the type described at the outset. When the tachograph is opened for the insertion or replacement of the chart disk, as in the case of tracking, the tachograph is automatically tracked to avoid overwriting the record already made on the chart disk. It is easily conceivable that is necessary.

[0007]

It is therefore an object of the present invention to keep the effort for the automatic follow-up of the chart disc housing as small as possible, and in particular to be able to incorporate it into a given traveling mechanism concept. It is to reduce the height of the structure as far as possible.

[0008]

In order to solve this problem, according to the present invention, an adjusting motor having a pinion fixed to a motor shaft directly acts on a first gear of a traveling mechanism. A slit is formed in the second gear of the traveling mechanism, and the second gear is operatively connected to the light barrier to form a pulse generator. With a slit that meshes
A third gear having the same tooth row, and a light barrier corresponding to the third gear are provided. Advantageous configurations are set out in claim 2.

[0009]

The present invention advantageously solves the above-described problem by requiring no additional components other than one adjusting motor and two light barriers formed as optical pass sensors. That is, only the existing gears of the traveling mechanism have been modified and utilized multiple times, and the number of axes remains unaffected. In addition, a general microprocessor for controlling an electronic timepiece is additionally utilized in the tachograph to realize the present invention. Therefore, the number of components and the required space are reduced, the following speed is increased, and the adjustment accuracy is significantly improved, as compared with a traveling mechanism that is followed manually. Furthermore, trying to lower the height of the structure
This is achieved in that the adjusting motor is arranged in the traveling mechanism such that the motor shaft is arranged transversely to the axis of the traveling mechanism. In this case, the pinion of the adjustment motor is
It meshes with a crown tooth row formed on a gear having a tooth row on the peripheral end surface of the traveling mechanism. The optimization is based on the fact that the selected concept results in the minimum required current by means of an additional regulating motor, and which, when unpowered, is forced to rotate together by the stepping motor of the drive mechanism, which is selected as regulating motor. It can also be seen that the motor does not effectively add torque to the stepper motor.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS The invention is explained in more detail below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a tachograph rectangular parallelepiped casing selected as an embodiment. In the front wall 2 of the casing, a window cutout 3 for a display 4 corresponding to the front wall 2 is formed. Reference numeral 5 denotes the casing 1
2 shows a shield plate on the front side of a drawer 6 guided inside. Keys 7, 8, supported on the front wall 2,
Among the keys 9, 10, 11, 12 the keys 7, 8 and the key 9, called the menu key, correspond to the driver or the driving assistant in order to select at least the most important working time data. The keys 10, 11 serve for forward / backward scrolling of the respectively selected data record. The key 12 is provided for unlocking and releasing the drawer 6. The seal indicated by the numeral 13 prevents unauthorized intervention in the diagnostic socket.

As is apparent from FIG. 2, the chart disk housing 14 has a plurality of gear pairs starting from a step motor 15 or a pinion 18 mounted on a shaft 16 of a rotor 17 of the step motor 15. It is driven via a transmission coupling. For details, see Pinion 18
Are gear pairs 19/20, each having a tooth row on the peripheral end face.
21/22, 23 (first gear) / 24, 25 (second gear) / 26, 27/28, and are gear-coupled to a tooth row 29 formed in the chart disk housing 14. A spring barrel (Federhaus) 31 is formed on the third gear 30, which also meshes with the tooth row 29, but is located outside the force transmission path between the step motor 15 and the chart disk housing 14. In this spring barrel, a drag spring (Schle
ppfeder) is working. This drag spring serves in a manner known per se to compensate for the play of the transmission coupling described above. According to the invention, the third gear 30 has the same tooth row as the chart disk housing 14. Further, a non-circular entraining mandrel 32 is formed in the chart disk container 14 in a general manner. That is, a 1: 1 transmission ratio is provided between the third gear 30 and the chart disk housing 14.
A slit 33 mounted on the third gear 30, together with a light barrier 34, serves to generate a signal for the zero position of the chart disc receptacle 14. That is, in such a position, the recording mechanism of the tachograph is located on the zero-time radial line of the chart disk accommodated in the chart disk accommodating body 14. The zero hour signal controls the pulse generator pulse counting.
This pulse generator is assigned to gear pair 25/26. That is, the second gear 25 includes, for example, 60 slits 35, and these slits are detected by the light barrier 36.

At 37, a regulating motor, preferably a DC motor, is shown. The motor shaft 38 of this DC motor
Is the shaft 16 of the rotor 17 or the axis 39 of the traveling mechanism,
It is arranged on the bottom 46 of the drawer 6 transversely to 40, 41, 42, 43, 44, 45. This contributes to the fact that the structural height of the traveling mechanism, which has already been conceived to be distributed flat, can be kept as low as possible, and that this height is substantially defined by the height of the entraining mandrel 32. I do. The transmission connection of the adjusting motor 37 to one gear of the traveling mechanism, in this case the first gear 23, takes place via a crown toothing 47 formed on the first gear 23. A pinion 48 of the adjustment motor 37 fixed to the motor shaft 38 meshes with the crown tooth row. An annular bulge formed at the bottom 46 of the drawer 6, indicated by the reference numeral 49, serves for lateral support of the first gear 23. The adjustment driving device provided for following the chart disk housing 14 can be superimposed on the clock driving device of the step motor 15 by the freewheel device 50 arranged corresponding to the gear pair 21/22. in this case,
The freewheel device 50 is embodied as a wrap spring coupling or wrap spring clutch. This lap spring clutch
The spring wire used for the lap spring 51 has a preferably rectangular cross section. As a result, high functional reliability is compensated for with few components and assembly. Specifically, the gear 22 has a shaft 52. On one side of the shaft, an unlabeled cylindrical running surface is formed. This running surface serves for the bearing of the gear 21. On the other hand, a tongue piece 53 having a rectangular cross section is integrally formed at the end of the shaft. This tongue is provided for non-rotatable reception of the bush 54. The bush is formed with a cylindrical surface 55. Moreover, the surface 55 has the same diameter as the cylindrical surface 57 formed integrally with the running collar 56 of the gear 21. Both sides 55, 57 serve as seats or friction surfaces for the lap spring 51. At 58, a plate is shown that at least partially covers the traveling mechanism. Reference numeral 59 indicates a side wall of the drawer 6.

The follow-up process of the chart disk container 14 is substantially as follows: the switching from winter time to daylight saving time by the tachograph microprocessor and vice versa; When it is confirmed or detected that the clock has been adjusted or that the tachograph supply voltage has been cut off based on the repair work of the vehicle, it is necessary to follow up to avoid overwriting the conventional record. Given the preconditions of
That is, at least when the drawer 6 is open, or in particular when both chart discs have been removed or not yet inserted in the equipment for two drivers, a signal, e.g. ,
It is reported to the driver that the tracking of the chart disk container 14 is performed while the vehicle is stationary. In any case, the necessary insertion control device can be used to recognize the presence of the chart disk.

When the start condition is satisfied, the light barrier 3
4 and 36 are switched on, and the adjusting motor 37 is supplied with power. When the zero position is reached, the signal generator 30,
Fired by the zero hour signals at 33 and 34, the time counter is reset and the pulses supplied by the pulse generators 25/35/36, in this embodiment minute pulses, are counted. The contents of the time counter are always compared with the target value of the electronic timepiece, and if they match, the adjusting motor 37 is stopped and the light barriers 34, 36 are switched off.

For the sake of completeness, let's just say:
Under the condition that the light barrier 36 is always switched on, the minute timing is appropriately converted. For example, the running display is realized by blinking the hour / minute-division scale symbol on the time display device of the display 4. As a result, the pulse generators 25/35/36 can also be used for functional control of the traveling mechanism.

[Brief description of the drawings]

FIG. 1 is a front view showing a tachograph equipped with a drawer as a carrier for a chart disk, selected as an example.

FIG. 2 is a plan view showing a traveling mechanism for driving a chart disk in a state in which a contour of a drawer is made to correspond to the traveling mechanism.

FIG. 3 is a development view of a part of the traveling mechanism taken along section line A of FIG. 2;

[Explanation of symbols]

1 casing, 2 front wall, 3 window cutout, 4 display, 5 front side shield plate,
6 drawer, 7, 8, 9, 10, 11, 12 key, 13 sealing part, 14 chart disk container, 15 step motor, 16 axis, 17 rotor, 18 pinion, 19/20, 21/22,
23/24, 25/26, 27/28 gear pairs (23
1st gear, 25 second gear), 29 teeth, 3
0 third gear, 31 spring barrel, 32
Entraining mandrel, 33 slit, 34 light barrier, 3
5 slits, 36 light barriers, 37 adjustment motors,
38 motor shafts, 39, 40, 41, 42, 43,
44, 45 axis, 46 bottom, 47 crown dentition, 48 pinion, 49 annular bulge, 50
Freewheel device, 51 lap spring, 52
Shaft, 53 tongue piece, 54 bush, 55,
57 cylindrical surface, 56 running collar, 58 plate, 59 side wall

 ──────────────────────────────────────────────────続 き Continuation of front page (71) Applicant 390009416 Kruppstrobe 105, Franckfurt am Main, BRD

Claims (6)

[Claims] 1. A tachograph comprising an electronic timepiece, a traveling mechanism for driving a chart disk serving as a record carrier in relation to time, and a chart disk container for centering and entraining the chart disk, When the time display and the time scale printed on the chart disk are inconsistent with the position relative to the tachograph recording mechanism acting on the chart disk, the chart disk container is made to follow. Means are provided, further provided with an adjusting motor, wherein the adjusting motor is operatively connected to the traveling mechanism, and a freewheel device is arranged between the adjusting motor and a step motor for driving the traveling mechanism. And a signal generator indicating the zero-time position of the chart disk container, and a pulse proportional to the time scale Is provided, and a comparison circuit is further provided.When the count value of the pulse supplied by the pulse generator corresponds to the current time, the comparison circuit supplies power to the adjustment motor. A motor (37) provided with a pinion (48) fixed to a motor shaft (38) is provided with a first gear (2) of a traveling mechanism.
3), and a slit (35) is formed in the second gear (25) of the traveling mechanism.
Gear (25) is operatively coupled to the light barrier (36) to form a pulse generator (25/35/36), and serves as a signal generator (30/33/34) as a chart disk housing (30/33/34). A third gear (30) having the same toothing, with a slit (33) meshing with 14), and
The light barrier (3) arranged corresponding to the third gear (30).
4) an electronic timepiece, wherein:
A tachograph having a traveling mechanism for driving a chart disk serving as a record carrier in relation to time. 2. An adjusting motor (37) comprising: a motor shaft (3);
8) is the axis of the traveling mechanism (39, 40, 41, 42, 4).
3, corresponding to the traveling mechanism so as to be located in a plane intersecting at a right angle to (3, 44, 45).
The tachograph described. 3. A third signal generator (30, 33, 34).
Gear (30) and a spring barrel (31) working for play compensation of the traveling mechanism are integrally formed.
The tachograph according to claim 1. 4. The pinion (48) of the adjusting motor (37).
3. The tachograph according to claim 2, wherein the first gear (23) with which the gears mesh is formed as both a spur gear and a crown gear. 5. The tachograph according to claim 1, wherein a DC motor is used as the adjusting motor. 6. The tachograph according to claim 1, wherein the freewheel device is formed as a lap spring clutch.