EP2100842A1 - Dispositif de sécurité pour un escalier mécanique - Google Patents

Dispositif de sécurité pour un escalier mécanique Download PDF

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Publication number
EP2100842A1
EP2100842A1 EP09154929A EP09154929A EP2100842A1 EP 2100842 A1 EP2100842 A1 EP 2100842A1 EP 09154929 A EP09154929 A EP 09154929A EP 09154929 A EP09154929 A EP 09154929A EP 2100842 A1 EP2100842 A1 EP 2100842A1
Authority
EP
European Patent Office
Prior art keywords
sensor
handrail
safety device
escalator
electrode
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.)
Withdrawn
Application number
EP09154929A
Other languages
German (de)
English (en)
Inventor
Michael Dr.-Ing. Tilkorn
Frank Neerhut
Ronny Ischganeit
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.)
ThyssenKrupp Fahrtreppen GmbH
Original Assignee
ThyssenKrupp Fahrtreppen GmbH
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 ThyssenKrupp Fahrtreppen GmbH filed Critical ThyssenKrupp Fahrtreppen GmbH
Publication of EP2100842A1 publication Critical patent/EP2100842A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B29/00—Safety devices of escalators or moving walkways
    • B66B29/02—Safety devices of escalators or moving walkways responsive to, or preventing, jamming by foreign objects
    • B66B29/04—Safety devices of escalators or moving walkways responsive to, or preventing, jamming by foreign objects for balustrades or handrails

Definitions

  • the invention relates to a safety device for an escalator or moving walks with a handrail, according to the preamble of claim 1.
  • Such a handrail is guided by a handrail insertion, wherein the handrail insertion comprises a forehead base with an insertion point for the handrail and the handrail insertion is provided with a sensor for detecting a body part or an object that represents a Einklemmgefahr.
  • Electric escalators include a handrail that is driven via a handrail entry in synchronism with the moving steps of the escalator.
  • a forehead base with an opening for the handrail is placed in the area of the handrail insertion.
  • the handrail When an exit of the escalator stairwell occurs, the handrail turns its direction of travel and is guided by a handrail entry. As the handrail enters through the handrail entry, it moves along an invisible area in the opposite direction to the free area of the handrail.
  • the DE 690 04 395 T2 describes a safety device in a reentry housing of the handrail of an escalator. This is to prevent objects from being pulled into the re-entrant housing by the moving handrail or injuring an escalator user.
  • a bumper base has a passage for the handrail.
  • the end cap is provided with a hub and a recess for a arranged in the re-entry housing base part with a locking projection.
  • the base part is movable relative to the end base in the handrail direction, so that the end cap is easily displaced.
  • the base part is provided downstream with a plurality of elongate pins which are guided by a guide member are. Another hub engages telescopically in a counterpart in the base part.
  • a housing part with a flange which engages with the end cap.
  • the housing part can slide together with the end cap.
  • the movable pins terminate at switches so that they can actuate the switches when the end cap is pressed.
  • radial pressure sensors are provided between an outer side of a hub of the end base and an inner surface of the base part. Disadvantage of this solution is that relatively many moving parts are required and that the sensors can react only relatively late to a dangerous situation. In addition, the required construction is complex.
  • Another from the EP 0 960 847 A1 known safety device comprises an inductive proximity switch.
  • the handrail is provided with a steel cable insert. At a distance to the handrail of the proximity switch is arranged, which can be triggered by the steel cable insert.
  • the switch is attached to a balustrade profile. If the handrail is raised, so the distance of the proximity switch increases, so that an error signal is carried out, which is evaluated by a controller.
  • the controller switches a main contactor that shuts off an escalator motor and a handrail motor.
  • This safety device primarily protects against vandalism, which can also lead to accidents and damage.
  • the invention has for its object to provide a safety device with which the end base can be equipped as possible without moving components, with a triggering should already be made when reaching the danger area, ie before touching the handrail insertion.
  • the device according to the invention has the advantage that the end base can be firmly fixed because it does not have to act on pins which are operatively connected with safety switches. Because the sensor is arranged on an end face of the end cap in the region of the insertion point, objects or a hand, for example, are detected even before they can penetrate into a gap between the handrail and end cap and can be clamped there.
  • the arrangement of the sensor also allows the end cap can be performed without moving components.
  • the end cap can be practically firmly connected to a reentrant housing of the handrail and screwed for example with this.
  • the construction and assembly in the area behind the handrail insertion simplifies.
  • the sensor can basically be an electromechanical sensor, which is provided, for example, with movable flaps which trigger a signal when actuated.
  • the sensor is designed as a non-contact sensor.
  • This can be embodied as an electromagnetic sensor, as a radar sensor, as a light barrier, as a video camera or as an infrared sensor.
  • This has the advantage that the safety-relevant area before handrail insertion without moving components for a low wear solution is low maintenance.
  • the contactless detection ensures low wear of the sensor.
  • the senor detects a change in an electrical and / or magnetic field in the forehead socket area. If a hand or other object gets close to the handrail, the rapid change in the electrical and / or magnetic field can be used to trigger an error signal or an error message.
  • the field can be set permanently in its propagation, wherein the field can be adjusted individually by appropriate parameterization of a transmitter to the respective environmental parameters of the escalator or the moving walk.
  • the senor has an electrode device with a frequency, in particular a sinusoidal frequency, which detects a change in a near-field coupling.
  • a near field can be defined. As soon as a person or other object enters the effective area of the near field, this can be detected by the system.
  • the senor is integrated in the end cap. It is very advantageous that first and second electrodes are integrated in the sensor.
  • the electrodes are part of the end socket and can be designed so that a field from the end base in the direction of the handrail propagates.
  • the first electrode is designed as a transmitting antenna and the second electrode as a receiving antenna.
  • the transmitting antenna is part of a radio transmitter which emits electromagnetic waves received by the radio receiver equipped with the receiving antenna. If a hand or other object reaches the effective range between the transmitting and receiving antenna, the amplitude of the receiver changes. As soon as this change exceeds a threshold value or passes outside a signal window, this can be considered a triggering criterion.
  • the sinusoidal radio frequency is 50 kHz to 200 kHz. On the one hand, this frequency is less susceptible to interference and on the other hand there are significant signal changes in the present application.
  • the voltage required for transmitting and receiving operation as well as the voltage of the other electronics can also be in the low-voltage range, for example 5 to 12 volts.
  • a further preferred development of the invention is characterized in that the sensor is connected to an information bus.
  • a bus-oriented transmission of the information for the shutdown and a diagnosis has the advantage that a relatively large number of sensors can be connected to a central evaluation electronics or control unit. Therefore, it is advantageous if a plurality of sensors can be connected to the transmitter or control unit.
  • the senor is connected to an alarm device with an optical and / or an acoustic warning means. Since the sensor reports a possible dangerous situation at a very early stage, a warning signal can prevent a hand from coming into contact with the handrail entry. A person can be warned in advance and can take his hand off in time before a stop is initiated.
  • the senor is connected to a device for switching off the escalator or moving walks, which initiates a stop process upon detection of a body part or object.
  • a monitoring electronics connected to the sensor can work according to stop category 0 according to EN60204 and may be self-monitoring.
  • the transmitter and / or the control unit may be connected to a switching device, in particular a main contactor, which shuts off an escalator motor and / or a handrail motor in case of danger.
  • gaps between the end base and the handrail are present, which are 1.5 to 3 mm, in particular 1.8 to 2.3 mm, preferably about 2 mm.
  • This gap dimensions which are possible by the invention, make the handrail insertion finger-safe, with sufficient freedom of movement for the handrail is given and assembly tolerances can be considered.
  • Fig. 1 illustrates a preferred embodiment of a safety device according to the invention 1. This is provided for an escalator, not shown, or moving walks.
  • the escalator is provided with a handrail 2, which is guided by a handrail insertion 3.
  • the handrail 2 is driven synchronously with the moving steps of the escalator.
  • the handrail inlet 3 is located on a front socket 4. This is mounted on a reentry housing of the handrail 2 of the escalator.
  • the end cap consists of an elastic material. For entry of the handrail 2 of the end cap is provided with an insertion point 5.
  • a sensor 6 is provided. This prevents a mechanism of the handrail 2 from being damaged or even injuring a person.
  • the sensor 6 detects early, for example, the fingers of a hand or an object that could be pinched.
  • the senor 6 is arranged on an end face 7 of the end base in the region of the insertion point.
  • the sensor 6 is designed as a contactless sensor, so that a sensor or near field 8 is detected by the sensor 6.
  • a sensor or near field 8 is detected by the sensor 6.
  • the sensor 6 becomes active and outputs a signal.
  • the dashed lines mark the area detectable by the sensor 6.
  • the senor 6 can use an electric field for detection.
  • electrodes similar to capacitor electrodes may be present. If a voltage is applied to the electrodes, an electric field is created between the electrodes. This is influenced by a conductive object.
  • the sensor behaves like a capacitance in this case. From this capacity, a resonant circuit can be constructed, wherein the capacitance is changed by an object in the sensor field.
  • non-contact sensors can alternatively be used. It is also possible to use sensors based on radar technology or infrared technology.
  • the senor works on the transmitter-receiver principle.
  • the transmitter builds up a magnetic field that changes at a high frequency.
  • the frequency can be received by the receiver. Only one carrier frequency is used here.
  • the senor has an electrode device with a frequency that detects a change in a Nahfeldkopplung, wherein in the sensor 6, a first electrode 10 and a second electrode 11 is present, such as Fig. 2 shows.
  • the first electrode 10 is designed as a transmitting antenna and the second electrode as a receiving antenna 11. In particular, they run parallel to one another and are arranged laterally of the handrail 2, wherein they completely grasp the handrail insertion 3.
  • the antennas 10, 11 are fixedly connected to the end base 4, so that the antennas 10, 11 are integrated in the base. They may be positively and / or non-positively connected to the base 4, for example with retaining means 12, 13, such as retaining clips, locking elements or the like. They can also be glued or cast in the base material.
  • the sensor 6 is in particular part of the end cap 4.
  • the electrode spacing is in particular 10 mm to 20 mm and must be greater than the width of the handrail 2.
  • a suitable sensor or radio frequency is in the range of 50 kHz to 200 kHz.
  • the waveform is preferably sinusoidal. This short-wave range is well suited for the electrode spacing of 10 mm to 20 mm.
  • Fig. 2 shows an embodiment of the sensor 6 as a transceiver unit.
  • the transmission antenna 10 is connected to a transmitter 14 or a transmission circuit.
  • the receiving antenna 11 is connected to a receiver 15 and a receiver circuit, respectively.
  • the transmitter sends, for example, a 100 kHz signal. This is received by the antenna and amplified by an amplifier.
  • the transmitter 14 and the receiver 15 may be located on a common circuit board. Both are electrically connected to a transmitter 16 and an evaluation circuit 16.
  • This circuit 16 may also be arranged on the same board. If, for example, the received signal falls below a previously defined threshold value, this can be determined by a comparator or another comparison unit, so that an alarm signal can be triggered.
  • detection algorithms can be used in the transmitter 16, which can detect a change in the near field coupling between the transmitting and receiving electrodes and thus detect the approach of a person or a conductive object.
  • the electrodes 10, 11 are preferably designed rod-shaped or rod antennas.
  • the sensor 6 is connected to an information bus 17 via a corresponding interface.
  • the bus 17 may be implemented as a two-wire bus with conventional bus protocols.
  • a central control unit 18 is connected on the bus. For example, it works according to stop category 0 according to EN60204.
  • the sensor 6 is thus connected to the control unit 18 or to a device for switching off the escalator or moving walks, which initiates a stop process upon detection of a body part or object.
  • the sensor 6 is connected to the evaluation electronics 16 or includes an evaluation, wherein a plurality of sensors via the bus 17 to the control unit 18 are connected. Preferably, up to four sensors can be connected to the evaluation electronics 16 or to the control unit 18.
  • the sensor 6 is connected to an alarm device 20 with an optical and / or an acoustic warning means 20. Preferably, this connection is via bus 17. This signal alerts the user to dangerous situations. For example, a potential-free switching contact can be activated.
  • Fig. 4 schematically shows the insertion point 5 of the handrail and the gap S of the gap 21 between the end cap 4 and the handrail 2.
  • the gap dimensions S are 1.5 to 3 mm, in particular 1.8 to 2.3 mm, preferably about 2 mm.
  • the invention is not limited to this example, so the sensor does not necessarily have to be arranged in the region of the handrail insertion.
  • it may also be mounted on the underside of the end base or may be attached only indirectly to the base 4.
  • a sensor operating as a light barrier can also be used. Also described or shown individual features can be combined with each other.

Landscapes

  • Escalators And Moving Walkways (AREA)
EP09154929A 2008-03-12 2009-03-11 Dispositif de sécurité pour un escalier mécanique Withdrawn EP2100842A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200820003486 DE202008003486U1 (de) 2008-03-12 2008-03-12 Sicherheitsvorrichtung für eine Fahrtreppe

Publications (1)

Publication Number Publication Date
EP2100842A1 true EP2100842A1 (fr) 2009-09-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP09154929A Withdrawn EP2100842A1 (fr) 2008-03-12 2009-03-11 Dispositif de sécurité pour un escalier mécanique

Country Status (2)

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EP (1) EP2100842A1 (fr)
DE (1) DE202008003486U1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2404860A1 (fr) 2010-07-08 2012-01-11 Thyssen Fahrtreppen GmbH Dispositif de sécurité pour escaliers roulants ou trottoirs roulants et escalier roulant ou trottoir roulant
EP3309108A1 (fr) * 2016-10-14 2018-04-18 Otis Elevator Company Trottoir roulant et procédé de fonctionnement d'un trottoir roulant

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6480352B2 (ja) * 2016-01-07 2019-03-06 株式会社日立製作所 乗客コンベア及びその制御方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4447807A (en) * 1981-06-22 1984-05-08 The B. F. Goodrich Company Signal to noise ratio improvement for rip detectors
US5001459A (en) * 1990-05-23 1991-03-19 Otis Elevator Company Escalator handrail guard warning device
US5259493A (en) * 1992-12-30 1993-11-09 Otis Elevator Company Roller handrail entry guard assembly
DE69004395T2 (de) 1989-09-29 1994-05-05 Otis Elevator Co Behinderungsvorrichtung für die Handleiste einer Fahrtreppe mit Detektoren.
EP0960847A1 (fr) 1998-05-27 1999-12-01 Inventio Ag Escalier ou tapis roulant avec un système de surveillance de la main-courante
JP2003212470A (ja) * 2001-11-15 2003-07-30 Toshiba Elevator Co Ltd 接近検知センサ、このセンサを用いた接近警報装置、接近警報システムおよび接近警報装置取付構造
US20030150692A1 (en) * 2002-02-08 2003-08-14 Thyssen Fahrtreppen Escalator or moving step assembly
US20060016666A1 (en) * 2004-07-26 2006-01-26 Walter Thierer Escalator or moving walkway with handrail entry, handrail entry of such an escalator or moving walkway, and method of reducing a gap in the handrail entry

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4447807A (en) * 1981-06-22 1984-05-08 The B. F. Goodrich Company Signal to noise ratio improvement for rip detectors
DE69004395T2 (de) 1989-09-29 1994-05-05 Otis Elevator Co Behinderungsvorrichtung für die Handleiste einer Fahrtreppe mit Detektoren.
US5001459A (en) * 1990-05-23 1991-03-19 Otis Elevator Company Escalator handrail guard warning device
US5259493A (en) * 1992-12-30 1993-11-09 Otis Elevator Company Roller handrail entry guard assembly
EP0960847A1 (fr) 1998-05-27 1999-12-01 Inventio Ag Escalier ou tapis roulant avec un système de surveillance de la main-courante
JP2003212470A (ja) * 2001-11-15 2003-07-30 Toshiba Elevator Co Ltd 接近検知センサ、このセンサを用いた接近警報装置、接近警報システムおよび接近警報装置取付構造
US20030150692A1 (en) * 2002-02-08 2003-08-14 Thyssen Fahrtreppen Escalator or moving step assembly
US20060016666A1 (en) * 2004-07-26 2006-01-26 Walter Thierer Escalator or moving walkway with handrail entry, handrail entry of such an escalator or moving walkway, and method of reducing a gap in the handrail entry

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2404860A1 (fr) 2010-07-08 2012-01-11 Thyssen Fahrtreppen GmbH Dispositif de sécurité pour escaliers roulants ou trottoirs roulants et escalier roulant ou trottoir roulant
DE102010017802A1 (de) 2010-07-08 2012-01-12 Thyssenkrupp Fahrtreppen Gmbh Sicherheitsvorrichtung für Fahrtreppen oder Fahrsteige sowie Fahrtreppe oder Fahrsteig
EP3309108A1 (fr) * 2016-10-14 2018-04-18 Otis Elevator Company Trottoir roulant et procédé de fonctionnement d'un trottoir roulant
CN107954302A (zh) * 2016-10-14 2018-04-24 奥的斯电梯公司 载人运送器和操作载人运送器的方法
US10053337B2 (en) 2016-10-14 2018-08-21 Otis Elevator Company People conveyor and method of operating a people conveyor

Also Published As

Publication number Publication date
DE202008003486U1 (de) 2008-05-15

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