EP0423638B1 - Sicherheitsschaltung für elektromotorisch angetriebene und elektrisch brems- oder arretierbare Schwungmassen oder Maschinenteile - Google Patents

Sicherheitsschaltung für elektromotorisch angetriebene und elektrisch brems- oder arretierbare Schwungmassen oder Maschinenteile Download PDF

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Publication number
EP0423638B1
EP0423638B1 EP19900119589 EP90119589A EP0423638B1 EP 0423638 B1 EP0423638 B1 EP 0423638B1 EP 19900119589 EP19900119589 EP 19900119589 EP 90119589 A EP90119589 A EP 90119589A EP 0423638 B1 EP0423638 B1 EP 0423638B1
Authority
EP
European Patent Office
Prior art keywords
relay
safety
switch
circuit
contact
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 - Lifetime
Application number
EP19900119589
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0423638A2 (de
EP0423638A3 (en
Inventor
Thomas Gallenschütz
Gerhard Oberle
Roland Ebert
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.)
Gallenschuetz Metallbau GmbH
Original Assignee
Gallenschuetz Metallbau 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 Gallenschuetz Metallbau GmbH filed Critical Gallenschuetz Metallbau GmbH
Publication of EP0423638A2 publication Critical patent/EP0423638A2/de
Publication of EP0423638A3 publication Critical patent/EP0423638A3/de
Application granted granted Critical
Publication of EP0423638B1 publication Critical patent/EP0423638B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002—Monitoring or fail-safe circuits
    • H01H47/004—Monitoring or fail-safe circuits using plural redundant serial connected relay operated contacts in controlled circuit
    • H01H47/005—Safety control circuits therefor, e.g. chain of relays mutually monitoring each other

Definitions

  • the invention relates to a safety circuit for electromotively driven and electrically switchable braking or locking devices for flywheels or machine parts, in particular a revolving door, in which at least one of two converging edges is provided with a touch-sensitive or pressure-sensitive electrical switching element or the like malfunctions occurring malfunctions of an electronic control unit, in particular a programmable microprocessor, and are used by the latter by means of an electronic switch to switch off the drive motor and / or to switch on the braking or locking device.
  • an electronic control unit in particular a programmable microprocessor
  • Such safety circuits are generally used to ensure that people or objects between the both come together and are caught by these, cannot be injured or damaged, the main task being to stop the part on which the moving edge is located as soon as the touch or pressure-sensitive switching element emits a corresponding fault signal. See, for example, DE-A-3 444 213.
  • This stopping of the motor-driven part can take place in two ways, namely by switching off the drive motor and simultaneously switching on a braking or locking device or only by switching on the electrical braking or locking device . In the latter case, however, this must be able to apply such a strong braking torque that cannot be overcome by the driving torque of the motor and the moment of inertia of the moving mass. However, this condition is also important in the event that the motor drive is not switched off by any switching disturbances.
  • the invention is therefore based on the object to improve a safety circuit of the type mentioned in such a way that the movement of the movable edge provided part, in particular a machine part or the revolving door is also stopped if the electronic switch of the control unit or the microprocessor does not interrupt the circuit of the drive motor when an interference signal is present and / or the control unit or the microprocessor does not switch on the braking or locking device .
  • the reliability of the improved safety circuit should be continuously checked by the microprocessor.
  • the electronic control unit is preceded by an electronic switching unit which receives the pending fault signals of the switching element and forwards it to the control unit, which, in accordance with the length of the fault signals, independently of the control unit, the continuous excitation of a safety relay, which is at least three, only jointly operated, positively driven or partially positively driven relay contact switches has at least one normally open contact, interrupts, one normally open contact in series with the electronic switch of the control unit in the circuit of the drive motor, one of the two other relay contact switches in a secondary circuit of the braking or locking device provided with a timing element lies and wherein the third relay contact switch is in a control circuit of the control unit to this in the form of a confirmation signal di e to confirm the correct functioning of the safety relay or the switching unit.
  • a safety relay which is at least three, only jointly operated, positively driven or partially positively driven relay contact switches has at least one normally open contact, interrupts, one normally open contact in series with the electronic switch of the control unit in the circuit of the drive motor, one of the two other relay contact switches in
  • the additional relay contact switches in the circuit of the drive motor and in a secondary circuit of the braking or locking device and their control by a switching unit independent of the control unit or the microprocessor ensures that even in the event of a partial or total failure of the electronic switch of the motor circuit and switching on the brake or locking device-related control part of the control unit or the microprocessor, the moving flywheel mass is stopped as soon as a fault signal is present at the switching unit.
  • the selected operating mode of the safety relay namely by the constant current supply, also ensures that the motor circuit is also interrupted and the braking or locking device is switched on if the switching unit fails. So a certain self-control is already created.
  • the correct operation of the safety relay is reported to the control unit or the microprocessor by the additional relay contact switch located in the control circuit, so that the functionality of the safety relay and its two working contacts are subject to continuous monitoring.
  • the configuration according to claim 6 provides an additional safety factor insofar as a check of the functionality of the safety relay if no fault signal occurs over a long period of time and its contacts can be carried out at shorter intervals.
  • Revolving door systems generally consist of a cylindrical stand body 20 with two shell-like, fixed sectors 21 and 23, between which an access opening 26 or an exit opening is provided on the outside and inside, through which people can enter or exit.
  • So-called safety strips 27 are arranged on the vertical delimitation bars 22 and 24 of these access and exit openings 26, which are provided with electrical switching elements 3 that react to pressure.
  • These switching elements 3 generate a fault signal if, for example, during the rotation of the three-leaf rotating door 25, which is rotatably mounted in the center and which is driven by a motor 10, an object gets between the outer edge of a door leaf and one of the delimitation bars 22, 24 and is clamped there.
  • the braking or locking force of the braking or locking device must be so great that the drive torque of the drive motor 10 cannot overcome it.
  • the braking or locking device must therefore be able to stop the revolving door even if the drive motor is not or not immediately switched off in the event of a fault in the control system despite the fault signal.
  • Such a braking or locking device 7 is shown schematically in FIGS. 2 to 4.
  • a microprocessor 1 is generally provided which opens and closes the circuit 9 of the electric motor 10 with the aid of an electronic switch 8 and which also controls the electrical braking or locking device 7 via a control line 12.
  • the electric braking or locking device 7 So after the drive motor 10 has been switched off and stopped the revolving door 25 by the electric braking or locking device 7 a jammed between a door leaf and a limiting member 22 or 24 object can be released again, the electric braking or locking device 7 after a short, z. B. lasting two seconds, delay time can be switched off again so that the revolving door 25 can be rotated again in the opposite direction.
  • the microprocessor 1 in its circuit of the electrical braking or locking device 7 is equipped with a timer which fulfills this task.
  • the microprocessor 1 While in the previously known switching devices of the generic type, the fault signals of the switching elements 3 are fed directly to the microprocessor 1 and therefore malfunctions in the microprocessor 1 when such a fault occurs can result in the drive motor 10 not being switched off and / or the electrical braking and locking device 2 to 4, the microprocessor 1 is preceded by a control unit 2 which on the one hand forwards the malfunction signals of the switching element 3 to the microprocessor 1 and causes the latter to switch on the electrical braking or locking device and through it electronic switch 8 to interrupt the motor circuit 9 and which on the other hand controls a safety relay 4.
  • This safety relay 4 is provided with at least three relays contact switches, a , b , c or a , b , d , which can only be actuated together, positively driven or partly forced guided relay switches or a , d , e are provided, of which at least one is a normally open contact a and is used to additionally switch off or interrupt the motor circuit 9. For this purpose, it is connected in series with the electronic switch 8 of the microprocessor 1 in the motor circuit 9.
  • the second relay contact switch b or e is located in a secondary circuit 6 of the electrical braking or locking device 7, which is additionally equipped with a timer 5 because it takes over the function of the aforementioned timer in the microprocessor 1 in the event of a fault.
  • the third relay contact switch c or d is located in a control circuit 11 and is used to report the correct functioning of the safety relay 4 or the switching unit 2 to the microprocessor each time a fault signal occurs in the form of a confirmation signal.
  • the safety relay 4 is operated in continuous excitation, so that it is switched off and drops when a fault signal arrives in the switching unit 2. This operating mode also ensures that a malfunction in the switching unit 2 or a malfunction in the safety relay 4 itself is reported to the microprocessor 1 if this leads to the safety relay 4 dropping out without a fault signal being present.
  • the safety strips 27 and their switching elements 3 are constructed in such a way that they act similarly to an NC contact when the described fault occurs, that is to say that a continuous current is interrupted or reduced.
  • Safety relays with positively driven or partially positively driven relay contact switches have the property that their contact switches can only be brought together into the other switching position by means of an actuating web 28.
  • Forced operation means that as long as a contact is closed at a certain switching position, no contacts in the opposite switching position may be closed.
  • Full force guidance is the state that when a contact is welded (not opened) within a spring set, the welded contact defines the switching state in the entire spring set. Since this fully synchronized state is only guaranteed with 100% contact reliability, it cannot be guaranteed in practice.
  • Partial forced operation means that a normally closed contact cannot be closed when a normally closed contact is welded and that no normally closed contact can be closed when a normally closed contact is welded.
  • the safety circuits shown schematically in FIGS. 2 to 4 operate as follows: As soon as a fault signal is received in the switching unit 2 by the switching element 3, this is passed on to the microprocessor 1, and this interrupts the motor circuit 9 through its electronic switch 8. At the same time, the switching unit 2 also switches off the safety relay 4, so that all the relay contact switches a , b , c and d and e each jump in their opposite switching position, ie open the relay contact switches a , b and c , while the relay contact switches d and e close at the same time. The opening of the relay contact switch a takes place in the normal case, i.e. if the electronic switch 8 is functioning properly, without power, because the mechanical relay contact switches are slower than the electronic switch 8.
  • the electrical braking or locking device 7 is switched off again after approximately two seconds by the timer 5 located in the microprocessor 1 or in the secondary circuit 6.
  • the dropout of the safety relay 4 is reported to the microprocessor 1 by the relay contact switches c and d .
  • a corresponding test circuit or a corresponding test program can prevent the microprocessor 1 from restarting the drive motor 10 in the absence of this confirmation signal or block the use of the revolving door by switching on the electrical braking or locking device.
  • the control circuit with the contact switch c or d thus serves to monitor the functionality of the so-called safety line, which represents the relay 4 with its relay contact switches a to e .
  • the safety relay 4 in the embodiment of FIG. 2 is equipped with three normally open contacts a , b , c
  • the safety relay 4 in the embodiment according to FIG. Fig. 3 equipped with two normally open contacts a and b and with a normally closed contact d
  • the safety relay 4 is only equipped with one normally open contact a and with two normally closed contacts d and e . In all cases, however, the normally open contact a is arranged in series with the electronic switch 8 of the motor circuit 9.
  • the so-called safety line can be used in this embodiment do not offer 100% security on their own.
  • the relay contact switch d located in the control circuit is designed as a break contact and takes the opposite switching position with respect to the make contact a
  • the partial positive guidance provided can guarantee that when the welded part is welded, i.e. it does not open incorrectly Relay contact switch a the relay contact switch d does not close and therefore cannot give a confirmation signal for the correct functioning to the microprocessor 1.
  • the embodiment of FIG. 4 which also the relay contact switch e located in the secondary circuit 6 of the electrical braking and locking device is designed as a break contact.
  • the two embodiments of FIGS. 2 and 4 can in principle also be used, however, because the contact reliability is never 100%, even with fully forced operation of the relay contact switch, the optimal functional reliability is not guaranteed, as in the embodiment of FIG. 3.
  • the safety circuit not only has the operational safety of the revolving door system been improved to a high degree of reliability by simple means, but it also has ensures that the additional so-called safety line can be continuously monitored for its functionality.
  • This safety switching device can be used wherever motorized flywheels have to be stopped immediately when an interference signal occurs. Their application is therefore not only limited to revolving doors and automatic door and gate systems in general, but can also be used with machines and machine parts.

Landscapes

  • Power-Operated Mechanisms For Wings (AREA)
  • Braking Arrangements (AREA)
  • Stopping Of Electric Motors (AREA)
  • Control Of Direct Current Motors (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Centrifugal Separators (AREA)
  • Control Of Position Or Direction (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
EP19900119589 1989-10-18 1990-10-12 Sicherheitsschaltung für elektromotorisch angetriebene und elektrisch brems- oder arretierbare Schwungmassen oder Maschinenteile Expired - Lifetime EP0423638B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3934662A DE3934662A1 (de) 1989-10-18 1989-10-18 Sicherheitsschaltung fuer elektromotorisch angetriebene und elektrisch brems- oder arretierbare schwungmassen oder maschinenteile
DE3934662 1989-10-18

Publications (3)

Publication Number Publication Date
EP0423638A2 EP0423638A2 (de) 1991-04-24
EP0423638A3 EP0423638A3 (en) 1992-04-22
EP0423638B1 true EP0423638B1 (de) 1995-01-11

Family

ID=6391661

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900119589 Expired - Lifetime EP0423638B1 (de) 1989-10-18 1990-10-12 Sicherheitsschaltung für elektromotorisch angetriebene und elektrisch brems- oder arretierbare Schwungmassen oder Maschinenteile

Country Status (6)

Country Link
US (1) US5159203A (da)
EP (1) EP0423638B1 (da)
AT (1) ATE117126T1 (da)
DE (1) DE3934662A1 (da)
DK (1) DK0423638T3 (da)
ES (1) ES2069648T3 (da)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4134016C1 (da) * 1991-10-14 1993-04-15
DE4136881A1 (de) * 1991-11-09 1993-05-13 Butzbacher Weichenbau Gmbh Verfahren zum verstellen einer ersten schiene zu einer zweiten schiene
DE9307326U1 (da) * 1993-05-14 1993-07-29 Siemens Ag, 80333 Muenchen, De
EP0645667A1 (en) * 1993-06-30 1995-03-29 Eastman Kodak Company Door safety system for storage phosphor cassette autoloader
US5647173A (en) * 1994-02-02 1997-07-15 Dorma Gmbh + Co. Kg Operating method for the operation of a revolving door
DE4402899C1 (de) * 1994-02-02 1995-08-17 Dorma Gmbh & Co Kg Betriebsverfahren für den Betrieb einer Karusselltür
JP3262988B2 (ja) * 1996-06-12 2002-03-04 本田技研工業株式会社 スライドドアの開閉制御装置
JP3323167B2 (ja) * 1999-11-02 2002-09-09 株式会社ナブコ 回転扉の扉支持機構
DE102004029767A1 (de) * 2004-06-21 2006-01-26 Dorma Gmbh + Co. Kg Karusselltür
GB2438644C (en) * 2006-06-02 2014-11-26 Knorr Bremse Rail Sys Uk Ltd Platform screen door

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678623A (en) * 1970-06-26 1972-07-25 Rush Ltd C J Control system for revolving door
DE2227184C2 (de) * 1972-06-03 1976-08-26 Adolf Riedl Ohg, 8580 Bayreuth Schutzschaltung für Schneidmaschinen für flexibles Schneidgut
GB1594577A (en) * 1978-02-03 1981-07-30 Herga Electric Control apparatus
CH639788A5 (en) * 1979-03-23 1983-11-30 Bircher Ag Safety device for prompt de-activation or switchover of an installation when a dangerous situation occurs
US4289995A (en) * 1979-08-01 1981-09-15 Keane Monroe Corporation Electric door operator with slip clutch and dynamic braking
DE3048989A1 (de) * 1980-12-24 1982-07-15 SWF-Spezialfabrik für Autozubehör Gustav Rau GmbH, 7120 Bietigheim-Bissingen Schaltanordnung zum antrieb eines beweglichen elementes, insbesondere zum antrieb von scheiben o.dgl. in kraftfahrzeugen
US4627193A (en) * 1983-09-20 1986-12-09 Milan Schwarz Revolving door control system
US4534131A (en) * 1983-10-31 1985-08-13 Heise Manufacturing Revolving door security system
DE3444213A1 (de) * 1984-12-04 1986-06-12 Gustav Riexinger Sicherheitssteuerung fuer ein zwischen zwei endlagen durch kraftbetaetigung hin- und herbewegliches bauelement, insbesondere fuer ein fenster, eine tuer oder ein tor

Also Published As

Publication number Publication date
DE3934662C2 (da) 1991-08-01
EP0423638A2 (de) 1991-04-24
DE3934662A1 (de) 1991-04-25
ES2069648T3 (es) 1995-05-16
EP0423638A3 (en) 1992-04-22
DK0423638T3 (da) 1995-06-19
ATE117126T1 (de) 1995-01-15
US5159203A (en) 1992-10-27

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