EP1390284A1 - Dispositif de determination de la position d'une cabine d'ascenseur sur rails au moyen d'un porteur de code - Google Patents

Dispositif de determination de la position d'une cabine d'ascenseur sur rails au moyen d'un porteur de code

Info

Publication number
EP1390284A1
EP1390284A1 EP02727141A EP02727141A EP1390284A1 EP 1390284 A1 EP1390284 A1 EP 1390284A1 EP 02727141 A EP02727141 A EP 02727141A EP 02727141 A EP02727141 A EP 02727141A EP 1390284 A1 EP1390284 A1 EP 1390284A1
Authority
EP
European Patent Office
Prior art keywords
code
guide rail
receiving groove
code carrier
elevator car
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02727141A
Other languages
German (de)
English (en)
Other versions
EP1390284B1 (fr
Inventor
René Kunz
Eric Birrer
Matthias Lorenz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inventio AG
Original Assignee
Inventio AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inventio AG filed Critical Inventio AG
Priority to EP02727141A priority Critical patent/EP1390284B1/fr
Publication of EP1390284A1 publication Critical patent/EP1390284A1/fr
Application granted granted Critical
Publication of EP1390284B1 publication Critical patent/EP1390284B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/02—Guideways; Guides
    • B66B7/022—Guideways; Guides with a special shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
    • B66B1/3492—Position or motion detectors or driving means for the detector

Definitions

  • the invention relates to a device for determining the absolute position of a rail-guided elevator car according to the definition of the claims.
  • Such position sensors are known. In elevator systems, these are used to determine the absolute position of an elevator car and to derive information signals therefrom for the control of the elevator system.
  • the position information is fixed in a coded form along the entire travel path of the elevator car and is read in coded form by means of a code reading device and processed in a control-understandable manner in an evaluation device.
  • a device is known from German utility model G 92 10 996.9, in which a magnetic strip is attached laterally to a cabin guide rail as a code carrier.
  • the magnetic stripe contains a length coding and coded information about stops or the like in the direction of displacement of the elevator car.
  • a magnetic head attached to the elevator car and movable with it in the direction of the coding relative to the magnetic strip reads the coded information and forwards it for evaluation.
  • Disadvantages of the known device consist in the hitherto usual attachment of the magnetic strip on or on the cabin guide rail, as well as in the design of the Magnetic stripe itself.
  • the magnetic stripe must be mounted on the guide rail in the correct position and without overstretching, in order to avoid falsifying the coding and resulting inaccuracies in the positioning of the elevator car.
  • uneven thermal expansions of the magnetic tape compared to the cabin guide rail occur, which results in a relative displacement of the. Coding to the guide rail.
  • the exposed position of the magnetic stripe on the side of the guide rail also harbors the risk of mechanical damage to the magnetic stripe due to parts moving in the shaft, such as the magnetic head when horizontal movements of the elevator car occur.
  • the known magnetic tape is clogged with lubricating oil and dust particles whirled up in the shaft, which impairs the reading of the coding.
  • the object of the invention is to provide a low-maintenance position transmitter device for elevators, which ensures permanent, exact reading of the absolute coding.
  • the non-magnetic cover also acts as a mechanical one Reinforcement for the code carrier and thereby prevents the coding from being falsified by uneven stretching of the code carrier in the reading direction.
  • a further increase in the reliability and accuracy of the position determination can be achieved with a code carrier, which is designed as a magnetic tape carrying the coding and a non-agnizable cover firmly connected thereto, in the form of a metallic masking tape.
  • a code carrier which is designed as a magnetic tape carrying the coding and a non-agnizable cover firmly connected thereto, in the form of a metallic masking tape.
  • a favorable heat balance between the code carrier and the guide rail is achieved with such a code carrier. This counteracts the temperature-related, unequal thermal expansions that occur over the length of the code carrier with respect to the guide rail, or evenens the expansion differences that occur.
  • the code carrier is inserted into a receiving groove of the guide rail with the cover facing outward.
  • the receiving groove enables simple and exact assembly of the code carrier because it can only be inserted into the constructively provided receiving groove without additional aids.
  • the magnetic tape carrying the coding is covered on all sides for protection.
  • the code carrier inserted in the receiving groove is embedded in the guide rail and covered on the outside by the cover and therefore essentially assumes its temperature. There are therefore no temperature-related differences in expansion between the code carrier and the guide rail.
  • the receiving groove is expediently formed on the end face of a guide flange of the cabin guide rail.
  • the production of the receiving groove is simple and the code carrier is very easily accessible for reading the coding for the code reading device.
  • a compact and space-saving design of the elevator is possible in an embodiment in which the receiving groove is formed on the side of a guide flange of the car guide rail. This arrangement also favors an exact reading of the coding with the aid of the code reading device.
  • cover is designed as a band with essentially two mutually parallel surfaces and side boundaries, with at least the side boundaries projecting laterally beyond the code carrier, and advantages with regard to a quick and exact assembly of the code carrier and the manufacture of the device according to the invention
  • Groove flanks of the receiving groove are complementary to the side boundaries of the masking tape.
  • the code carrier is preferably attached to the guide rail in a magnetically self-adhesive manner. This enables easy and time-saving assembly. At the same time, the code carrier lies directly on the guide rail and promotes heat transfer between the two. The code carrier follows all movements of the guide rail without the connection becoming detached or the code carrier experiencing local swellings.
  • the receiving groove lies in a region of the guide flange which is subject to high dynamic stresses when the elevator car is moving. In order to avoid notch stresses arising from the receiving groove in this area, it is expedient to machine the foot area of the guide flange by hot rolling.
  • Figure 1 schematically an elevator with an embodiment of the position transmitter device according to the invention
  • Figure 2a a first embodiment of the magnetic tape according to the invention and its attachment to the guide rail in section according to section line II-II in Fig. 1
  • Figure 2b a second embodiment of the magnetic tape and its attachment to the side
  • FIG. 2b Figure 3c, a third embodiment of the magnetic tape and its attachment to the guide rail;
  • Figure 4a a fourth embodiment of a receiving groove on the side of the guide rail;
  • Figure 4b a fifth embodiment of the receiving groove on the side of the guide rail;
  • FIG. 5 a detailed view V of the receiving groove from Fig. 4b.
  • Fig. 1 shows an elevator with a shaft 1, in which an elevator car 2 and a counterweight 3 are suspended on a common support cable 4.
  • the supporting cable 4 is guided over a non-driven deflection roller 5 and a driven traction sheave 6 and is driven by the latter.
  • the traction sheave 6 transmits the driving forces of a drive motor, not shown here, for lifting and lowering the elevator car 2 and the counterweight 3 to the supporting cable 4 driven by it.
  • the elevator car 2 can be displaced vertically along a guide rail 7.
  • a code tape 9 is attached along the guide rail 7 parallel to the direction of movement 8 of the elevator car 2. In the direction of movement 8 of the elevator car 2, the code tape 9 contains coded length or position information and coded information about stops or the like.
  • the coded information is read from a sensor head 10 and passed on to the evaluation unit 11.
  • the sensor head 10 is arranged on the elevator car 2 and is moved together with the latter along the code band 9.
  • the sensor head 10 is equipped with suitable sensors. Suitable for this purpose are, for example, Hall sensors, induction transmitters or — as in the exemplary embodiment shown — magnetoresitive sensors that detect the magnetic field direction, so-called MR sensors. Either several individual and / or a group of different sensors can be provided from each of these sensors.
  • the coded information read from the sensor head 10 is forwarded to an evaluation unit 11.
  • the evaluation unit 11 translates the coded information into a form that is understandable for the elevator control 12, before it is forwarded, for example, to the elevator control 12 via a hanging cable 13 for positioning the elevator car 2.
  • the code tape 9 consists of a magnetic tape 14 and a metallic masking tape 15.
  • the magnetic tape 14 is glued centrally to the metallic cover tape 15, the cover tape 15 projecting beyond the magnetic tape 14 on both sides.
  • the magnetic tape 14 is inserted into a receiving groove 16 on the end face 17 of the guide flange 18 of the guide rail 7 and is covered towards the shaft 1 by the metallic cover tape 15.
  • the magnetic tape 14 consists of vulcanized nitrile rubber as a binder, in which aligned barium ferrite is embedded.
  • the magnetic tape can be formed from a plastic or rubber material in which any magnetizable material can be embedded.
  • the magnetizable material is magnetized in an alternating order in the form of sections extending transversely to the longitudinal direction of the magnetic tape, either as a magnetic north pole or as a magnetic south pole.
  • the magnetized sections form correspondingly oriented magnetic fields on the outside and represent the code marks of the magnetic tape 14.
  • two different values "0" and "1" can thus be represented as basic components of the coding.
  • the non-magnetic metallic cover 15 is for protection against mechanical damage of the "magnetic tape 14 by the shaft 1 of moving parts, including the sensor head 10, and the balance of alstetenden over the strip length dissimilar thermal expansions of the magnetic tape 14 relative to the guide rail 7. As mechanical reinforcement of the magnetic tape 14 prevents an uneven stretching of the magnetic tape 14 and thus a falsification of the coding during assembly .. Because of its non-magnetic property, the magnetic code marks of the magnetic tape 14 also remain readable for the sensor head 10 through the cover tape 14.
  • the receiving groove 16 is milled over the entire length of the end face 17 of the guide flange 18 and has a cross section which is complementary to the shape of the magnetic tape 14 and is here rectangular.
  • the code tape 9 is with With the help of the magnetic coding of the magnetic tape 14 held magnetically self-adhesive in the receiving groove 16 stationary.
  • a fixed connection for example by means of a screw connection at the upper end of the guide section, serves to secure the position of the magnetic tape 14.
  • adhesive points can be used at regular intervals over the length of the receiving groove 16 to fix the magnetic tape (not shown). However, one is. Gluing is not absolutely necessary with sufficient magnetic self-adhesion of the magnetic tape.
  • FIG. 2b shows an embodiment of the device according to the invention in which a code tape 19 is inserted flush into a receiving groove 23 formed laterally on the foot 20 of the guide flange 21 of a guide rail 22.
  • a sensor head 24 is moved together with the elevator car 2 in the vertical direction 8.
  • a sensor 27 is arranged on a carrier 26 of the sensor head 24 and reads the coded information from the code tape 19, which is then forwarded to an evaluation unit 28.
  • FIG. 3b shows a detailed view IIb of the embodiment from FIG. 2b.
  • the code tape 19 with a substantially rectangular cross section is inserted flush with a metallic non-magnetic cover tape 29 facing outward into a complementary receiving groove 23 of the guide flange.
  • a magnetic tape 30 is firmly bonded to the code tape 19 with the metallic non-magnetic cover tape 29.
  • the code tape 31 again consists of a magnetic tape 33 and a cover tape 34 firmly adhered to it.
  • the magnetic tape 33 corresponds in structure and function to the magnetic tape 14 of the embodiment shown in FIG. 3a.
  • the cover tape 34 has a trapezoidal cross section and projects symmetrically on both sides beyond the magnetic tape 33. The side boundaries 35, 36 of the cover tape 34 are chamfered towards the magnetic tape 33.
  • the groove depth 37 of the receiving groove 38 is greater than the thickness 39 of the code tape 34.
  • the width 40 of the receiving groove 38 is selected to be greater than the width 41 of the magnetic tape 33, while the width 42 of the masking tape 34 is basically the clear width 40 of the receiving groove 38
  • Side surfaces 43, 44 of the receiving groove 38 and the side boundaries 35, 36 of the cover tape 34 are complementary to one another. In the assembled state, the cover band 34 is flush with the surface of the guide rail 32. The position of the magnetic tape 33 is clearly specified by the firmly connected cover tape 34.
  • the receiving groove 38 can be manufactured inexpensively with large manufacturing tolerances, because only the side surfaces 43, 44 on the easily accessible upper edge of the receiving groove 38 are to be designed to be complementary to the side boundaries 35, 36 of the cover tape 34.
  • the receiving groove lies in a region of the guide flange which is subject to high dynamic stresses when the elevator car is moving. To come from the receiving groove in this area To avoid notch stresses, the foot area of the guide flange can be pre-machined by hot rolling.
  • a bead 48 with tension-favorable transitions 49 is formed in the foot region 45 of the guide flange 46 over the length of the guide rail 47.
  • the receiving groove 50 is then machined into this bead 48.
  • An alternative embodiment to the bead 48 without weakening the foot area 45 provides for the receiving groove to be limited laterally at least on one side by a rolled-on rib.
  • 4b shows a receiving groove 51 with rounded transitions of the groove flanks 52, 53, which is rolled into the guide flange 54. 5 that two mutually parallel channels 55, 56 are rolled over the length of the guide rail.
  • the area 57 between the grooves 55, 56 is machined, e.g. milled, and forms a flat support surface 58 for a code tape (not shown).

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

L'invention vise à déterminer la position d'une cabine d'ascenseur sur rails. A cet effet, le dispositif de détection de position comporte un porteur de code (9) présentant des marques de code de perméabilités différentes, disposé sur le rail de guidage de manière fixe sur le trajet de ladite cabine. Une lecture précise et durable des codes est mise en oeuvre par liaison fixe du porteur de code (9) à un capot amagnétique (15), les marques de code étant recouvertes vers l'extérieur au moyen d'un capot amagnétique (15). Dans un mode de réalisation avantageux, le porteur de code (9) est logé dans une rainure de réception (16) du rail de guidage de cabine (7) avec le capot amagnétique (15) dirigé vers l'extérieur. Ainsi, il est possible de mettre en oeuvre une construction simple et fiable et d'éviter par ailleurs des écarts de dilatation dépendant de la température entre le porteur de code et le rail de guidage.
EP02727141A 2001-05-31 2002-05-22 Dispositif de determination de la position d'une cabine d'ascenseur sur rails au moyen d'un porteur de code Expired - Lifetime EP1390284B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02727141A EP1390284B1 (fr) 2001-05-31 2002-05-22 Dispositif de determination de la position d'une cabine d'ascenseur sur rails au moyen d'un porteur de code

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP01810528 2001-05-31
EP01810528 2001-05-31
PCT/CH2002/000273 WO2002096788A1 (fr) 2001-05-31 2002-05-22 Dispositif de determination de la position d'une cabine d'ascenseur sur rails au moyen d'un porteur de code
EP02727141A EP1390284B1 (fr) 2001-05-31 2002-05-22 Dispositif de determination de la position d'une cabine d'ascenseur sur rails au moyen d'un porteur de code

Publications (2)

Publication Number Publication Date
EP1390284A1 true EP1390284A1 (fr) 2004-02-25
EP1390284B1 EP1390284B1 (fr) 2005-11-09

Family

ID=8183938

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02727141A Expired - Lifetime EP1390284B1 (fr) 2001-05-31 2002-05-22 Dispositif de determination de la position d'une cabine d'ascenseur sur rails au moyen d'un porteur de code

Country Status (9)

Country Link
US (1) US6886667B2 (fr)
EP (1) EP1390284B1 (fr)
CN (1) CN1233543C (fr)
CA (1) CA2446419C (fr)
DE (1) DE50204874D1 (fr)
HK (1) HK1065020A1 (fr)
MY (1) MY136401A (fr)
TW (1) TWI257369B (fr)
WO (1) WO2002096788A1 (fr)

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Also Published As

Publication number Publication date
EP1390284B1 (fr) 2005-11-09
CN1233543C (zh) 2005-12-28
US20040129504A1 (en) 2004-07-08
HK1065020A1 (en) 2005-02-08
TWI257369B (en) 2006-07-01
MY136401A (en) 2008-09-30
CA2446419A1 (fr) 2002-12-05
CA2446419C (fr) 2010-07-20
US6886667B2 (en) 2005-05-03
DE50204874D1 (de) 2005-12-15
WO2002096788A1 (fr) 2002-12-05
CN1512955A (zh) 2004-07-14

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