CODE SECTION MARKER

Abstract

An elevator system having an elevator car in an elevator shaft and having a measuring tape in the elevator shaft for determining the position of the elevator car in the elevator shaft. The measuring tape is arranged vertically in the elevator shaft and has optical coding for length measurement. At least one marking element which has optical marking is arranged on the measuring tape. The marking element is fixedly arranged on the measuring tape. A sensor device which comprises a lighting source and a sensor which form a detection field for detecting the measuring tape is attached to the elevator car. The elevator system comprises an evaluation device for decoding the codings in the detection field and a control device for controlling the elevator system as a function of the coding and/or of the position of the at least one marking element on the measuring tape.

Claims

1. An elevator system having an elevator car in an elevator shaft comprising: a measuring tape for determining the position of the elevator car in the elevator shaft, which is arranged vertically in the elevator shaft, and has optical coding for length measurement; at least one marking element that is arranged on the measuring tape and has optical coding; a sensor device which is attached to the elevator car and comprises a lighting source and a sensor which form a detection field for detecting the measuring tape; an evaluation device for decoding the codings in the detection field; and a control device for controlling the elevator system as a function of the at least one marking element, wherein the marking element is fixedly arranged on the measuring tape.

2. The elevator system according to claim 1, wherein the marking element is attached to the measuring tape in a non-displaceable fashion.

3. The elevator system according to claim 1, wherein the coding of the marking element covers the coding of the measuring tape.

4. The elevator system according to claim 1, wherein the coding of the marking element has the same code format as the measuring tape, and/or corresponds to a length specification of the code format of the measuring tape, and/or has a value outside the length range of the measuring tape.

5. The elevator system according to claim 1, wherein the coding of the measuring tape is formed from a plurality of successive position patterns.

6. The elevator system according to claim 1, wherein the coding of the marking element is formed from one or more position patterns which are the same in format and arrangement as the position patterns of the measuring tape.

7. The elevator system according to claim 1, wherein the marking element is embodied as a clip to be fitted over the measuring tape, and/or is embodied sealed in order to provide proof of replacement and/or is embodied as an adhesive strip to be stuck onto the measuring tape.

8. The elevator system according to claim 1, wherein the marking element has a characterization region for sensory identification of its property through color, size, shape or labelling.

9. The elevator system according to claim 1, wherein the control device assigns different properties selected from a permissible maximum speed, an upper or lower shaft end, an upper or lower door zone, or door level to the different examples of coding the marking elements by means of a table in a non-volatile memory in the control device.

10. The elevator system according to claim 1, wherein the elevator system has a plurality of marking elements with different examples of coding on the measuring tape, the coding of which marking elements corresponds to coding for which a property is assigned in the control device, and/or has on the measuring tape a marking element for the permissible maximum speed of the elevator car, which marking element is arranged under the marking element for the lower shaft end, and/or has at specific positions on the measuring tape marking elements with a specific property for these positions in the elevator shaft selected from the upper and the lower shaft ends, the upper and lower inspection limits, the upper and lower door zones and/or the door levels.

11. The elevator system according to claim 1, wherein in the delivery state the control device does not assign any position to the different properties of the codings and/or limits the speed of the elevator car to a specific service speed.

12. The elevator system according to claim 1, wherein in a first learning journey of the elevator car with respect to the marking element for the maximum speed, the control device stores the maximum speed detected from the coding of said marking element in a memory, and/or in the case of a second learning journey via all the marking elements for position specifications the control device stores the property of said marking elements which is assigned to their code and the assigned detected position of the marking elements on the measuring tape in a memory and/or releases the elevator system for normal operation, and/or in the normal operating state, the control device controls the elevator system as a function of the maximum speed, positions and assigned properties which are stored in its memory and have been read in from the marking elements.

13. A marking element with an attachment element for attachment to a measuring tape and having optical coding, wherein the marking element is designed to cover the coding of the measuring tape with its coding after the attachment to the measuring tape, and the coding corresponds to a length specification of over 50 m, over 100 m, over 500 m, over 1 km, or over 1.5 km.

14. The elevator system according to claim 2, wherein the marking element is attached to the measuring tape in a functionally locking or materially joined fashion.

15. The elevator system according to claim 4, wherein the coding of the marking element has a value above the length range of the measuring tape by 1 km or 1.5 km.

16. The elevator system according to claim 5, wherein the successive position patterns are 2D codes.

17. The elevator system according claim 11, wherein in the delivery state the control device limits the speed of the elevator car to a speed lower than the permissible maximum speed in the normal operation state.

18. The elevator system according claim 11, wherein in the delivery state the control device limits the speed of the elevator car to 0.6 m/s.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Exemplary embodiments of the present invention are illustrated in the drawings and are explained in more detail below. Identical reference symbols in the individual figures denote here elements which correspond to one another.

[0045] FIG. 1 shows a marking element on the measuring tape of an elevator system;

[0046] FIG. 2 shows a side view of the marking element with the measuring tape;

[0047] FIG. 3 shows a side view of the marking element with the measuring tape; and

[0048] FIG. 4 shows an alternative marking element with the measuring tape.

DETAILED DESCRIPTION OF THE INVENTION

[0049] FIG. 1 shows a marking element 20 on a measuring tape 10 of an elevator system.

[0050] The measuring tape 10 is arranged continuously from top to bottom in the elevator shaft at least over the entire travel distance of the elevator car. The measuring tape 10 has on its front side two black edge strips between which optical coding 11 is provided. The coding is composed of position patterns which are adjacent without gap and are made of a matrix of 8×3 black or white squares which represent a 27 bit value which represents a length position for the length measurement and therefore for the determination of the position of the elevator car.

[0051] The marking element 20 surrounds the measuring tape 10 in an non-displaceable fashion. The marking part is composed of a rear part behind the measuring tape and a front part over the front side of the measuring tape. A section 21 of the measuring tape is applied to the front side of the marking element in such a way that it is arranged in a line with the measuring tape. The measuring tape section 21 has coding 22 which is also structured like the measuring tape. The coding 22 of the measuring tape section 21 of the marking element 20 has successive position patterns for successive length values of above 1.5 km. The marking element has a characterization region 23 on which the property which is assigned to its coding is written as a marking 24. In the figure shown, this is a specification of the permissible maximum speed of the elevator system of 1.0 m/s.

[0052] FIG. 2 shows the marking element 20 with the measuring tape 10 in a lateral perspective. It is apparent that the coding 22 of the measuring tape section 21 of the marking element 20 covers the coding 11 of the measuring tape 10 precisely.

[0053] FIG. 3 shows the marking element 20 with the measuring tape 10 in a side view. The marking element has a front part 26 which covers the front side of the measuring tape 10 and its coding in a section and which bears the measuring tape section 21. The measuring tape section has precisely the length of the coverage of the measuring tape by the marking element. The rear part 25 of the marking element is held on the front part 26 by a connecting web 27 and a screw 29 and surrounds the measuring tape 10 from the rear. The rear part has a spring element 28 which presses the measuring tape 10 in a non-displaceable fashion against the front part 26.

[0054] FIG. 4 shows an alternative embodiment of a marking element 20. The alternative marking element 20 is composed of a rear part 25 and a front part 26 which of 2 securing elements which engage partially over the measuring tape 10 in the lateral direction and a finger web which extends completely over the measuring tape. The alternative marking element 20 is embodied as a clip and can be fitted around the measuring tape 10 by turning it in and it is secured to the measuring tape 10 in a non-displaceable fashion by independent clamping, without screwing. The finger web of the front part 26 bears a measuring tape section 21 with coding 22 which has just the length of a position pattern. The position pattern is constructed in the same format as the position patterns of the measuring tape 10 and represents a length value of above 1.5 km.

LIST OF REFERENCE NUMBERS

[0055] 10 Measuring tape [0056] 11 Coding [0057] 20 Marking element [0058] 21 Measuring tape section [0059] 22 Coding [0060] 23 Marking region [0061] 24 Marking [0062] 25 Rear part [0063] 26 Front part [0064] 27 Connecting web [0065] 28 Spring element [0066] 29 Screw