EP0082074B1 - Dispositif de contrôle de la surface mobile d'un transporteur continu - Google Patents

Dispositif de contrôle de la surface mobile d'un transporteur continu Download PDF

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Publication number
EP0082074B1
EP0082074B1 EP82402252A EP82402252A EP0082074B1 EP 0082074 B1 EP0082074 B1 EP 0082074B1 EP 82402252 A EP82402252 A EP 82402252A EP 82402252 A EP82402252 A EP 82402252A EP 0082074 B1 EP0082074 B1 EP 0082074B1
Authority
EP
European Patent Office
Prior art keywords
sensor
fact
monitoring device
coil
moving surface
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.)
Expired
Application number
EP82402252A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0082074A1 (fr
Inventor
Serge Pannetrat
Gérard Le Bouquin
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.)
Regie Autonome des Transports Parisiens
Original Assignee
Regie Autonome des Transports Parisiens
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 Regie Autonome des Transports Parisiens filed Critical Regie Autonome des Transports Parisiens
Priority to AT82402252T priority Critical patent/ATE19042T1/de
Publication of EP0082074A1 publication Critical patent/EP0082074A1/fr
Application granted granted Critical
Publication of EP0082074B1 publication Critical patent/EP0082074B1/fr
Expired 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
    • B66B29/005—Applications of security monitors

Definitions

  • a continuous passenger conveyor such as a moving walkway or an escalator, is equipped with numerous safety devices to limit the risk of injury to users.
  • the landing plates constitute the area where the risks of accidents are among the most numerous and the most serious. These plates are therefore usually fitted with an uplift detector sensitive to abnormal deformation of the moving surface or to the presence of a foreign body integral with it.
  • such a detector is not sensitive to a deformation of the mobile surface which would only show a dip compared to the normal level.
  • such a configuration is very dangerous because it can allow, for example, the engagement of a user's foot, the lifting detector acting only after this engagement, therefore too late to avoid injury.
  • the object of the present invention is to detect hollow deformations of the mobile surface.
  • It relates to a device for controlling the mobile surface of a continuous conveyor comprising at least one zone where said mobile surface is not used for transport and where the useful face of the elements which compose it moves in its plane, comprising at least one proximity sensor placed at a point in said zone opposite said movable surface and a logic circuit which triggers a fault signal upon command of said sensor.
  • said logic circuit includes a relay for each sensor, the coil of which is supplied by said sensor, and a time delay which maintains the supply of said coil for a predetermined time in the absence of supply for said sensor.
  • said sensors are carried by a pivoting bar maintained in unstable equilibrium in the working position of said sensors.
  • a contactor detects the maintenance of said bar in its unstable equilibrium position.
  • the floor of an escalator is composed of a succession of steps 1 connected together. When they are on an inclined part they deploy and form the staircase, while at the boarding or landing stages 2 they form a horizontal surface. The steps are returned from below after a turnaround followed by a horizontal landing. It is to the right of this horizontal landing that the control device 3 according to the invention is located, because the upper face of the steps, then turned over, is not used for transport and runs at a constant level, therefore in its own plane, over a length at least equal to its dimension in the direction of travel.
  • This control device essentially comprises one or more proximity sensors 4 maintained at a determined distance from the upper face of the steps 1 when the latter is in its normal position.
  • a support 5 allows the adjustment of this distance for each sensor 4.
  • the monitoring device is intended to detect dips in the upper face of the step 1. However, it may happen that it is a fault in excess thickness which appears. For example when the element which constitutes this upper face is partially detached from the frame of the step and collapses under the action of gravity. This element could then strike the sensor 4 and destroy it. This is why each support 5 has a height which makes it possible to equal or exceed the upper level of the sensor 4 which it contains. This constitutes mechanical protection which prevents any deterioration.
  • each support 5 is mounted on a bar 6 which can pivot inside a bearing 7 fixed to the frame 8 of the escalator, on each side thereof. Each support 5 being located above the axis of rotation defined by the bearings 7, the balance of the assembly is unstable. To reinforce the maintenance in this unstable position, the bar 6 is terminated at at least one of its ends by a disc 9 comprising a notch in which engages a caster 10 (or a ball) pushed by a spring 11.
  • a means detects this tilting and signals the deactivation of the control device.
  • the roller 10 can ensure this detection due to its lifting out of the corresponding notch, when the assembly tips.
  • the upper face of the step 1 can be monitored by a single point detector, or several arranged side by side on the bar 6, or a single strip-shaped.
  • the signal emitted by the sensor 4 is processed by a logic circuit 15 shown diagrammatically in FIG. 3.
  • the proximity sensor 4 is supplied with current by a source marked + and -. It delivers an output signal which supplies the coil 12 of a relay.
  • the output signal from the sensor 4 is such that the coil 12 is supplied with current when the plate 1 is at a suitable distance from the sensor. 4.
  • the sensor 4 stops supplying the coil 12, which causes the actuation of a contact of the corresponding relay and the triggering of a fault signal which can for example cause the stop of the controlled installation.
  • the logic circuit further comprises a time delay, constituted by a capacitor 13 and a resistor 14, ⁇ connected in parallel with the coil 12 of the relay.
  • the output current from the sensor 4 is canceled, but the coil 12 remains supplied by the capacitor 13 which discharges there, the discharge current being controlled by the resistor 14.
  • the discharge time up to the threshold from which the maintenance of the relay corresponding to the coil 12 is no longer guaranteed corresponds to the time it takes for a fault considered acceptable to pass through the detection zone. If the crossing time of the detected fault is greater than the discharge time, the coil 12 is no longer supplied and the corresponding relay produces a fault signal.
  • the logic circuit shown in Figure 3 corresponds to the case where a single sensor 4 is used.
  • the corresponding logic circuit includes as many times the circuit previously described; the contacts of the relays 12 then being grouped, in series or in parallel depending on whether they are working on opening or closing, to produce a single fault signal.
  • the proximity sensors 4 can be electromagnetic induction or capacity effect or any other.
  • the coil relay 12 can be replaced by electronic components ensuring the same function.
  • the control device according to the present invention is applicable in all technical areas where it is important to ensure the presence in good place of an organ. It is particularly advantageous in the case of a passenger transport system because of the seriousness of the risk which it makes it possible to avoid. This is the case, for example, for escalators whose upper face of the steps is constituted by a metal plate attached to a frame, or for moving walkways whose floor consists of a succession of metal plates.

Landscapes

  • Control Of Conveyors (AREA)
  • Escalators And Moving Walkways (AREA)
EP82402252A 1981-12-10 1982-12-09 Dispositif de contrôle de la surface mobile d'un transporteur continu Expired EP0082074B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82402252T ATE19042T1 (de) 1981-12-10 1982-12-09 Ueberwachungsvorrichtung fuer die sich bewegende oberflaeche eines ununterbrochenen foerderbandes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8123128A FR2518074A1 (fr) 1981-12-10 1981-12-10 Dispositif de controle de la surface mobile d'un transporteur continu
FR8123128 1981-12-10

Publications (2)

Publication Number Publication Date
EP0082074A1 EP0082074A1 (fr) 1983-06-22
EP0082074B1 true EP0082074B1 (fr) 1986-04-09

Family

ID=9264885

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82402252A Expired EP0082074B1 (fr) 1981-12-10 1982-12-09 Dispositif de contrôle de la surface mobile d'un transporteur continu

Country Status (4)

Country Link
EP (1) EP0082074B1 (enrdf_load_stackoverflow)
AT (1) ATE19042T1 (enrdf_load_stackoverflow)
DE (1) DE3270507D1 (enrdf_load_stackoverflow)
FR (1) FR2518074A1 (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3863999D1 (de) * 1987-09-01 1991-09-05 Inventio Ag Abschaltvorrichtung fuer eine fahrtreppe.
US5316121A (en) * 1992-11-25 1994-05-31 Otis Elevator Company Escalator missing step detection
US5361887A (en) * 1994-03-14 1994-11-08 Otis Elevator Company Apparatus for detecting an irregularity in the frequency of steps passing a particular point within a passenger conveying device
AU5633396A (en) * 1995-06-30 1997-02-05 Otis Elevator Company Pallet sensor assembly
DE19606317C2 (de) * 1996-02-21 1999-03-25 O & K Rolltreppen Gmbh Sicherheitseinrichtung für Rolltreppen
DE10297787B4 (de) * 2002-09-13 2013-01-31 Otis Elevator Co. Sicherheitsüberwachung für Personenbeförderer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1832204A (en) * 1928-04-14 1931-11-17 Francis G Healy Escalator

Also Published As

Publication number Publication date
FR2518074A1 (fr) 1983-06-17
DE3270507D1 (en) 1986-05-15
EP0082074A1 (fr) 1983-06-22
FR2518074B1 (enrdf_load_stackoverflow) 1984-03-16
ATE19042T1 (de) 1986-04-15

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